Revert "Reconnect"

Reconnect

.Rbuildignore

@@ -6,7 +6,13 @@
 ^shiny\.cmd$
 ^run\.R$
 ^\.gitignore$
+^smoketests$
 ^res$
 ^man-roxygen$
 ^\.travis\.yml$
 ^staticdocs$
+^tools$
+^srcjs$
+^CONTRIBUTING.md$
+^cran-comments.md$
+^.*\.o$

.gitattributes

@@ -0,0 +1,4 @@
+/NEWS merge=union
+/inst/www/shared/shiny.js -merge -diff
+*.min.js -merge -diff
+*.js.map -merge -diff

.gitignore

@@ -8,3 +8,4 @@
 /src-x86_64/
 shinyapps/
 README.html
+.*.Rnb.cached

.travis.yml

@@ -1,27 +1,8 @@
-# it is not really python, but there is no R support on Travis CI yet
-language: python
+language: r
+sudo: false
+cache: packages
 
-# environment variables
-env:
-  - R_LIBS_USER=~/R R_MY_PKG="$(basename $TRAVIS_REPO_SLUG)"
-
-# install dependencies
-install:
-  - sudo apt-add-repository -y "deb http://cran.rstudio.com/bin/linux/ubuntu `lsb_release -cs`/"
-  - sudo apt-key adv --keyserver keyserver.ubuntu.com --recv-keys E084DAB9
-  - sudo apt-add-repository -y ppa:marutter/c2d4u
-  - sudo apt-get update
-  - sudo apt-get install r-base-dev r-cran-shiny r-cran-cairo r-cran-markdown
-  - "[ ! -d ~/R ] && mkdir ~/R"
-  - Rscript -e "install.packages(c('xtable'), repos = 'http://cran.rstudio.org')"
-  - Rscript -e "install.packages('knitr', repos = c('http://rforge.net', 'http://cran.rstudio.org'))"
-  - Rscript -e "install.packages('$R_MY_PKG', dep = TRUE, repos = 'http://cran.rstudio.org')"
-
-# run tests
-script:
-  - cd ..; rm -f *.tar.gz; R CMD build $R_MY_PKG
-  - R CMD check $R_MY_PKG*.tar.gz --no-manual
-
-after_failure:
-  - cat $R_MY_PKG.Rcheck/00install.out || true
-  - cat $R_MY_PKG.Rcheck/00check.log || true
+notifications:
+  email:
+    on_success: change
+    on_failure: change

CONTRIBUTING.md

@@ -0,0 +1,10 @@
+
+We welcome contributions to the **shiny** package. To submit a contribution:
+
+1. [Fork](https://github.com/rstudio/shiny/fork) the repository and make your changes.
+
+2. Ensure that you have signed the [individual](http://www.rstudio.com/wp-content/uploads/2014/06/RStudioIndividualContributorAgreement.pdf) or [corporate](http://www.rstudio.com/wp-content/uploads/2014/06/RStudioCorporateContributorAgreement.pdf) contributor agreement as appropriate. You can send the signed copy to jj@rstudio.com.
+
+3. Submit a [pull request](https://help.github.com/articles/using-pull-requests).
+
+We'll try to be as responsive as possible in reviewing and accepting pull requests. We appreciate your contributions!

DESCRIPTION

@@ -1,64 +1,142 @@
 Package: shiny
 Type: Package
 Title: Web Application Framework for R
-Version: 0.9.1.9008
-Date: 2014-03-19
-Author: RStudio, Inc.
-Maintainer: Winston Chang <winston@rstudio.com>
-Description: Shiny makes it incredibly easy to build interactive web
+Version: 0.13.1.9002
+Date: 2016-02-17
+Authors@R: c(
+    person("Winston", "Chang", role = c("aut", "cre"), email = "winston@rstudio.com"),
+    person("Joe", "Cheng", role = "aut", email = "joe@rstudio.com"),
+    person("JJ", "Allaire", role = "aut", email = "jj@rstudio.com"),
+    person("Yihui", "Xie", role = "aut", email = "yihui@rstudio.com"),
+    person("Jonathan", "McPherson", role = "aut", email = "jonathan@rstudio.com"),
+    person(family = "RStudio", role = "cph"),
+    person(family = "jQuery Foundation", role = "cph",
+    comment = "jQuery library and jQuery UI library"),
+    person(family = "jQuery contributors", role = c("ctb", "cph"),
+    comment = "jQuery library; authors listed in inst/www/shared/jquery-AUTHORS.txt"),
+    person(family = "jQuery UI contributors", role = c("ctb", "cph"),
+    comment = "jQuery UI library; authors listed in inst/www/shared/jqueryui/1.10.4/AUTHORS.txt"),
+    person("Mark", "Otto", role = "ctb",
+    comment = "Bootstrap library"),
+    person("Jacob", "Thornton", role = "ctb",
+    comment = "Bootstrap library"),
+    person(family = "Bootstrap contributors", role = "ctb",
+    comment = "Bootstrap library"),
+    person(family = "Twitter, Inc", role = "cph",
+    comment = "Bootstrap library"),
+    person("Alexander", "Farkas", role = c("ctb", "cph"),
+    comment = "html5shiv library"),
+    person("Scott", "Jehl", role = c("ctb", "cph"),
+    comment = "Respond.js library"),
+    person("Stefan", "Petre", role = c("ctb", "cph"),
+    comment = "Bootstrap-datepicker library"),
+    person("Andrew", "Rowls", role = c("ctb", "cph"),
+    comment = "Bootstrap-datepicker library"),
+    person("Dave", "Gandy", role = c("ctb", "cph"),
+    comment = "Font-Awesome font"),
+    person("Brian", "Reavis", role = c("ctb", "cph"),
+    comment = "selectize.js library"),
+    person("Kristopher Michael", "Kowal", role = c("ctb", "cph"),
+    comment = "es5-shim library"),
+    person(family = "es5-shim contributors", role = c("ctb", "cph"),
+    comment = "es5-shim library"),
+    person("Denis", "Ineshin", role = c("ctb", "cph"),
+    comment = "ion.rangeSlider library"),
+    person("Sami", "Samhuri", role = c("ctb", "cph"),
+    comment = "Javascript strftime library"),
+    person(family = "SpryMedia Limited", role = c("ctb", "cph"),
+    comment = "DataTables library"),
+    person("John", "Fraser", role = c("ctb", "cph"),
+    comment = "showdown.js library"),
+    person("John", "Gruber", role = c("ctb", "cph"),
+    comment = "showdown.js library"),
+    person("Ivan", "Sagalaev", role = c("ctb", "cph"),
+    comment = "highlight.js library"),
+    person(family = "R Core Team", role = c("ctb", "cph"),
+    comment = "tar implementation from R")
+    )
+Description: Makes it incredibly easy to build interactive web
     applications with R. Automatic "reactive" binding between inputs and
     outputs and extensive pre-built widgets make it possible to build
     beautiful, responsive, and powerful applications with minimal effort.
-License: GPL-3
+License: GPL-3 | file LICENSE
 Depends:
-    R (>= 2.14.1),
+    R (>= 3.0.0),
     methods
 Imports:
-    tools,
     utils,
-    httpuv (>= 1.2.0),
-    caTools,
-    RJSONIO,
+    httpuv (>= 1.3.3),
+    mime (>= 0.3),
+    jsonlite (>= 0.9.16),
     xtable,
-    digest
+    digest,
+    htmltools (>= 0.3.5),
+    R6 (>= 2.0),
+    sourcetools
 Suggests:
     datasets,
-    markdown,
     Cairo (>= 1.5-5),
     testthat,
-    knitr
-URL: http://www.rstudio.com/shiny/
+    knitr (>= 1.6),
+    markdown,
+    rmarkdown,
+    ggplot2
+URL: http://shiny.rstudio.com
 BugReports: https://github.com/rstudio/shiny/issues
-Roxygen: list(wrap = FALSE)
+VignetteBuilder: knitr
 Collate:
     'app.R'
     'bootstrap-layout.R'
+    'conditions.R'
     'map.R'
     'globals.R'
     'utils.R'
-    'htmltools.R'
     'bootstrap.R'
     'cache.R'
+    'diagnose.R'
     'fileupload.R'
+    'stack.R'
     'graph.R'
     'hooks.R'
     'html-deps.R'
+    'htmltools.R'
+    'image-interact-opts.R'
+    'image-interact.R'
     'imageutils.R'
+    'input-action.R'
+    'input-checkbox.R'
+    'input-checkboxgroup.R'
+    'input-date.R'
+    'input-daterange.R'
+    'input-file.R'
+    'input-numeric.R'
+    'input-password.R'
+    'input-radiobuttons.R'
+    'input-select.R'
+    'input-slider.R'
+    'input-submit.R'
+    'input-text.R'
+    'input-utils.R'
     'jqueryui.R'
     'middleware-shiny.R'
     'middleware.R'
+    'modules.R'
+    'notifications.R'
     'priorityqueue.R'
+    'progress.R'
     'react.R'
     'reactive-domains.R'
     'reactives.R'
+    'render-plot.R'
+    'render-table.R'
     'run-url.R'
+    'server-input-handlers.R'
     'server.R'
     'shiny.R'
     'shinyui.R'
     'shinywrappers.R'
     'showcase.R'
-    'slider.R'
-    'tags.R'
     'tar.R'
     'timer.R'
     'update-input.R'
+RoxygenNote: 5.0.1

NAMESPACE

@@ -1,8 +1,10 @@
-# Generated by roxygen2 (4.0.0): do not edit by hand
+# Generated by roxygen2: do not edit by hand
 
 S3method("$",reactivevalues)
+S3method("$",session_proxy)
 S3method("$",shinyoutput)
 S3method("$<-",reactivevalues)
+S3method("$<-",session_proxy)
 S3method("$<-",shinyoutput)
 S3method("[",reactivevalues)
 S3method("[",shinyoutput)
@@ -13,23 +15,22 @@ S3method("[[",shinyoutput)
 S3method("[[<-",reactivevalues)
 S3method("[[<-",shinyoutput)
 S3method("names<-",reactivevalues)
-S3method(as.character,shiny.tag)
-S3method(as.character,shiny.tag.list)
 S3method(as.list,reactivevalues)
 S3method(as.shiny.appobj,character)
 S3method(as.shiny.appobj,list)
 S3method(as.shiny.appobj,shiny.appobj)
-S3method(format,html)
-S3method(format,shiny.tag)
-S3method(format,shiny.tag.list)
+S3method(as.tags,shiny.appobj)
+S3method(as.tags,shiny.render.function)
 S3method(names,reactivevalues)
-S3method(print,html)
 S3method(print,reactive)
 S3method(print,shiny.appobj)
-S3method(print,shiny.tag)
-S3method(print,shiny.tag.list)
 S3method(str,reactivevalues)
+export("conditionStackTrace<-")
+export(..stacktraceoff..)
+export(..stacktraceon..)
 export(HTML)
+export(NS)
+export(Progress)
 export(a)
 export(absolutePanel)
 export(actionButton)
@@ -38,31 +39,48 @@ export(addResourcePath)
 export(animationOptions)
 export(as.shiny.appobj)
 export(basicPage)
+export(bootstrapLib)
 export(bootstrapPage)
 export(br)
+export(browserViewer)
+export(brushOpts)
+export(brushedPoints)
+export(callModule)
+export(cancelOutput)
+export(captureStackTraces)
 export(checkboxGroupInput)
 export(checkboxInput)
+export(clickOpts)
 export(code)
 export(column)
+export(conditionStackTrace)
 export(conditionalPanel)
+export(createWebDependency)
 export(dataTableOutput)
 export(dateInput)
 export(dateRangeInput)
+export(dblclickOpts)
+export(dialogViewer)
 export(div)
 export(downloadButton)
 export(downloadHandler)
 export(downloadLink)
 export(em)
+export(eventReactive)
 export(exprToFunction)
+export(extractStackTrace)
 export(fileInput)
+export(fillCol)
+export(fillPage)
+export(fillRow)
 export(fixedPage)
 export(fixedPanel)
 export(fixedRow)
 export(flowLayout)
 export(fluidPage)
 export(fluidRow)
+export(formatStackTrace)
 export(getDefaultReactiveDomain)
-export(getProvidedHtmlDependencies)
 export(h1)
 export(h2)
 export(h3)
@@ -71,11 +89,14 @@ export(h5)
 export(h6)
 export(headerPanel)
 export(helpText)
+export(hoverOpts)
 export(hr)
 export(htmlOutput)
+export(htmlTemplate)
 export(icon)
 export(imageOutput)
 export(img)
+export(incProgress)
 export(includeCSS)
 export(includeHTML)
 export(includeMarkdown)
@@ -86,7 +107,11 @@ export(installExprFunction)
 export(invalidateLater)
 export(is.reactive)
 export(is.reactivevalues)
+export(is.shiny.appobj)
+export(is.singleton)
 export(isolate)
+export(knit_print.html)
+export(knit_print.reactive)
 export(knit_print.shiny.appobj)
 export(knit_print.shiny.render.function)
 export(knit_print.shiny.tag)
@@ -98,17 +123,24 @@ export(maskReactiveContext)
 export(navbarMenu)
 export(navbarPage)
 export(navlistPanel)
+export(nearPoints)
 export(need)
+export(ns.sep)
 export(numericInput)
 export(observe)
+export(observeEvent)
 export(onReactiveDomainEnded)
 export(outputOptions)
 export(p)
 export(pageWithSidebar)
+export(paneViewer)
 export(parseQueryString)
+export(passwordInput)
 export(plotOutput)
 export(plotPNG)
 export(pre)
+export(printError)
+export(printStackTrace)
 export(radioButtons)
 export(reactive)
 export(reactiveFileReader)
@@ -123,6 +155,7 @@ export(reactiveValues)
 export(reactiveValuesToList)
 export(registerInputHandler)
 export(removeInputHandler)
+export(removeNotification)
 export(renderDataTable)
 export(renderImage)
 export(renderPlot)
@@ -131,17 +164,23 @@ export(renderTable)
 export(renderText)
 export(renderUI)
 export(repeatable)
+export(req)
 export(runApp)
 export(runExample)
+export(runGadget)
 export(runGist)
 export(runGitHub)
 export(runUrl)
 export(selectInput)
 export(selectizeInput)
+export(serverInfo)
+export(setProgress)
 export(shinyApp)
 export(shinyAppDir)
+export(shinyAppFile)
 export(shinyServer)
 export(shinyUI)
+export(showNotification)
 export(showReactLog)
 export(sidebarLayout)
 export(sidebarPanel)
@@ -152,6 +191,7 @@ export(splitLayout)
 export(stopApp)
 export(strong)
 export(submitButton)
+export(suppressDependencies)
 export(tabPanel)
 export(tableOutput)
 export(tabsetPanel)
@@ -166,10 +206,13 @@ export(textInput)
 export(textOutput)
 export(titlePanel)
 export(uiOutput)
+export(updateActionButton)
 export(updateCheckboxGroupInput)
 export(updateCheckboxInput)
 export(updateDateInput)
 export(updateDateRangeInput)
+export(updateNavbarPage)
+export(updateNavlistPanel)
 export(updateNumericInput)
 export(updateRadioButtons)
 export(updateSelectInput)
@@ -182,12 +225,15 @@ export(validateCssUnit)
 export(verbatimTextOutput)
 export(verticalLayout)
 export(wellPanel)
+export(withLogErrors)
 export(withMathJax)
+export(withProgress)
 export(withReactiveDomain)
 export(withTags)
-import(RJSONIO)
-import(caTools)
+import(R6)
 import(digest)
+import(htmltools)
 import(httpuv)
 import(methods)
+import(mime)
 import(xtable)

NEWS

@@ -1,9 +1,406 @@
-shiny 0.9.1.9XXX
+shiny 0.13.1.9001
+--------------------------------------------------------------------------------
+* Improved `renderTable()` function to make the tables look prettier and also
+  provide the user with a lot more parameters to customize their tables with.
+
+* Added `updateActionButton()` function, so the user can change an Action Button's
+  (or Link's) label and/or icon. Also check that the icon argument (for both
+  creation and updating of a button) is valid and throw a warning otherwise.
+
+* Fixed #1056: Upgraded Bootstrap to 3.3.6.
+
+* Updated ion.RangeSlider to 2.1.2.
+
+* Fixed #561: DataTables might pop up a warning when the data is updated
+  extremely frequently.
+
+* Fixed #776: In some browsers, plots sometimes flickered when updated.
+
+* When resized, plots are drawn with `replayPlot()`, instead of re-executing
+  all plotting code. This results in faster plot rendering.
+
+* Added `cancelOutput` function, and a `cancelOutput` parameter to `req`. The
+  function causes the currently executing output to cancel its execution, and
+  leave its previous state alone (as opposed to clearing the output). The `req`
+  parameter similarly modifies the behavior of `req`.
+
+* Added code diagnostics: if there is an error parsing ui.R, server.R, app.R,
+  or global.R, Shiny will search the code for missing commas, extra commas,
+  and unmatched braces, parens, and brackets, and will print out messages
+  pointing out those problems.
+
+shiny 0.13.1
+--------------------------------------------------------------------------------
+
+* `flexCol` did not work on RStudio for Windows or Linux.
+
+* Fixed RStudio debugger integration.
+
+* BREAKING CHANGE: The long-deprecated ability to pass functions (rather than
+  expressions) to reactive() and observe() has finally been removed.
+
+shiny 0.13.0
+--------------------------------------------------------------------------------
+
+* Fixed #962: plot interactions did not work with the development version of
+  ggplot2 (after ggplot2 1.0.1).
+
+* Fixed #902: the `drag_drop` plugin of the selectize input did not work.
+
+* Fixed #933: `updateSliderInput()` does not work when only the label is
+  updated.
+
+* Multiple imageOutput/plotOutput calls can now share the same brush id. Shiny
+  will ensure that performing a brush operation will clear any other brush with
+  the same id.
+
+* Added `placeholder` option to `textInput`.
+
+* Improved support for Unicode characters on Windows (#968).
+
+* Fixed bug in `selectInput` and `selectizeInput` where values with double
+  quotes were not properly escaped.
+
+* `runApp()` can now take a path to any .R file that yields a `shinyApp` object;
+  previously, the path had to be a directory that contained an app.R file (or
+  server.R if using separately defined server and UI). Similarly, introduced
+  `shinyAppFile()` function which creates a `shinyApp` object for an .R file
+  path, just as `shinyAppDir()` does for a directory path.
+
+* Introduced Shiny Modules, which are designed to 1) simplify the reuse of
+  Shiny UI/server logic and 2) make authoring and maintaining complex Shiny
+  apps much easier. See the article linked from `?callModule`.
+
+* `invalidateLater` and `reactiveTimer` no longer require an explicit `session`
+  argument; the default value uses the current session.
+
+* Added `session$reload()` method, the equivalent of hitting the browser's
+  Reload button.
+
+* Added `shiny.autoreload` option, which will automatically cause browsers to
+  reload whenever Shiny app files change on disk. This is intended to shorten
+  the feedback cycle when tweaking UI code.
+
+* Errors are now printed with stack traces! This should make it tremendously
+  easier to track down the causes of errors in Shiny. Try it by calling
+  `stop("message")` from within an output, reactive, or observer. Shiny itself
+  adds a lot of noise to the call stack, so by default, it attempts to hide all
+  but the relevant levels of the call stack. You can turn off this behavior by
+  setting `options(shiny.fullstacktrace=TRUE)` before or during app startup.
+
+* Fixed #1018: the selected value of a selectize input is guaranteed to be
+  selected in server-side mode.
+
+* Added `req` function, which provides a simple way to prevent a reactive,
+  observer, or output from executing until all required inputs and values are
+  available. (Similar functionality has been available for a while using
+  validate/need, but req provides a much simpler and more direct interface.)
+
+* Improve stability with Shiny Server when many subapps are used, by deferring
+  the loading of subapp iframes until a connection has first been established
+  with the server.
+
+* Upgrade to Font Awesome 4.5.0.
+
+* Upgraded to Bootstrap 3.3.5.
+
+* Switched to an almost-complete build of jQuery UI with the exception of the
+  datepicker extension, which conflicts with Shiny's date picker.
+
+* Added `fillPage` function, an alternative to `fluidPage`, `fixedPage`, etc.
+  that is designed for apps that fill the entire available page width/height.
+
+* Added `fillRow` and `fillCol` functions, for laying out proportional grids in
+  `fillPage`. For modern browsers only.
+
+* Added `runGadget`, `paneViewer`, `dialogViewer`, and `browserViewer`
+  functions to support Shiny Gadgets. More detailed docs about gadgets coming
+  soon.
+
+* Added support for the new htmltools 0.3 feature `htmlTemplate`. It's now
+  possible to use regular HTML markup to design your UI, but still use R
+  expressions to define inputs, outputs, and HTML widgets.
+
+shiny 0.12.2
+--------------------------------------------------------------------------------
+
+* GitHub changed URLs for gists from .tar.gz to .zip, so `runGist` was updated
+  to work with the new URLs.
+
+* Callbacks from the session object are now guaranteed to execute in the order
+  in which registration occurred.
+
+* Minor bugs in sliderInput's animation behavior have been fixed. (#852)
+
+* Updated to ion.rangeSlider to 2.0.12.
+
+* Added `shiny.minified` option, which controls whether the minified version
+  of shiny.js is used. Setting it to FALSe can be useful for debugging. (#826,
+  #850)
+
+* Fixed an issue for outputting plots from ggplot objects which also have an
+  additional class whose print method takes precedence over `print.ggplot`.
+  (#840, 841)
+
+* Added `width` option to Shiny's input functions. (#589, #834)
+
+* Added two alias functions of `updateTabsetPanel()` to update the selected tab:
+  `updateNavbarPage()` and `updateNavlistPanel()`. (#881)
+
+* All non-base functions are now explicitly namespaced, to pass checks in
+  R-devel.
+
+* Shiny now correctly handles HTTP HEAD requests. (#876)
+
+shiny 0.12.1
+--------------------------------------------------------------------------------
+
+* Fixed an issue where unbindAll() causes subsequent bindAll() to be ignored for
+  previously bound outputs. (#856)
+
+* Undeprecate `dataTableOutput` and `renderDataTable`, which had been deprecated
+  in favor of the new DT package. The DT package is a bit too new and has a
+  slightly different API, we were too hasty in deprecating the existing Shiny
+  functions.
+
+shiny 0.12.0
+--------------------------------------------------------------------------------
+
+* Switched from RJSONIO to jsonlite. This improves consistency and speed when
+  converting between R data structures and JSON. One notable change is that
+  POSIXt objects are now serialized to JSON in UTC8601 format (like
+  "2015-03-20T20:00:00Z"), instead of as seconds from the epoch).
+
+* In addition to the existing support for clicking and hovering on plots
+  created by base graphics, added support for double-clicking and brushing.
+  (#769)
+
+* Added support for clicking, hovering, double-clicking, and brushing for
+  plots created by ggplot2, including support for facets. (#802)
+
+* Added `nearPoints` and `brushedPoints` functions for easily selecting rows of
+  data that are clicked/hovered, or brushed. (#802)
+
+* Added `shiny.port` option. If this is option is set, `runApp()` will listen on
+  this port by default. (#756)
+
+* `runUrl`, `runGist`, and `runGitHub` now can save downloaded applications,
+  with the `destdir` argument. (#688)
+
+* Restored ability to set labels for `selectInput`. (#741)
+
+* Travis continuous integration now uses Travis's native R support.
+
+* Fixed encoding issue when the server receives data from the client browser.
+  (#742)
+
+* The `session` object now has class `ShinySession`, making it easier to test
+  whether an object is indeed a session object. (#720, #746)
+
+* Fix JavaScript error when an output appears in nested uiOutputs. (Thanks,
+  Gregory Zhang. #749)
+
+* Eliminate delay on receiving new value when `updateSliderInput(value=...)` is
+  called.
+
+* Updated to DataTables (Javascript library) 1.10.5.
+
+* Fixed downloading of files that have no filename extension. (#575, #753)
+
+* Fixed bug where nested UI outputs broke outputs. (#749, #750)
+
+* Removed unneeded HTML ID attributes for `checkboxGroupInputs` and
+  `radioButtons`. (#684)
+
+* Fixed bug where checkboxes were still active even after `Shiny.unbindAll()`
+  was called. (#206)
+
+* The server side selectize input will load the first 1000 options by default
+  before users start to type and search in the box. (#823)
+
+* renderDataTable() and dataTableOutput() have been deprecated in shiny and will
+  be removed in future versions of shiny. Please use the DT package instead:
+  http://rstudio.github.io/DT/ (#807)
+
+shiny 0.11.1
+--------------------------------------------------------------------------------
+
+* Major client-side performance improvements for pages that have many
+  conditionalPanels, tabPanels, and plotOutputs. (#693, #717, #723)
+
+* `tabPanel`s now use the `title` for `value` by default. This fixes a bug
+  in which an icon in the title caused problems with a conditionalPanel's test
+  condition. (#725, #728)
+
+* `selectInput` now has a `size` argument to control the height of the input
+  box. (#729)
+
+* `navbarPage` no longer includes a first row of extra whitespace when
+  `header=NULL`. (#722)
+
+* `selectInput`s now use Bootstrap styling when `selectize=FALSE`. (#724)
+
+* Better vertical spacing of label for checkbox groups and radio buttons.
+
+* `selectInput` correctly uses width for both selectize and non-selectize
+  inputs. (#702)
+
+* The wrapper tag generated by `htmlOutput` and `uiOutput` can now be any type
+  of HTML tag, instead of just span and div. Also, custom classes are now
+  allowed on the tag. (#704)
+
+* Slider problems in IE 11 and Chrome on touchscreen-equipped Windows computers
+  have been fixed. (#700)
+
+* Sliders now work correctly with draggable panels. (#711)
+
+* Fixed arguments in `fixedPanel`. (#709)
+
+* downloadHandler content callback functions are now invoked with a temp file
+  name that has the same extension as the final filename that will be used by
+  the download. This is to deal with the fact that some file writing functions
+  in R will auto-append the extension for their file type (pdf, zip).
+
+shiny 0.11
+--------------------------------------------------------------------------------
+
+* Changed sliders from jquery-slider to ion.rangeSlider. These sliders have
+  an improved appearance, support updating more properties from the server,
+  and can be controlled with keyboard input.
+
+* Switched from Bootstrap 2 to Bootstrap 3. For most users, this will work
+  seamlessly, but some users may need to use the shinybootstrap2 package for
+  backward compatibility.
+
+* The UI of a Shiny app can now have a body tag. This is useful for CSS
+  templates that use classes on the body tag.
+
+* `actionButton` and `actionLink` now pass their `...` arguments to the
+  underlying tag function. (#607)
+
+* Added `observeEvent` and `eventReactive` functions for clearer, more concise
+  handling of `actionButton`, plot clicks, and other naturally-imperative
+  inputs.
+
+* Errors that happen in reactives no longer prevent any remaining pending
+  observers from executing. It is also now possible for users to control how
+  errors are handled, with the 'shiny.observer.error' global option. (#603,
+  #604)
+
+* Added an `escape` argument to `renderDataTable()` to escape the HTML entities
+  in the data table for security reasons. This might break tables from previous
+  versions of shiny that use raw HTML in the table content, and the old behavior
+  can be brought back by `escape = FALSE` if you are aware of the security
+  implications. (#627)
+
+* Changed the URI encoding/decoding functions internally to use `encodeURI()`,
+  `encodeURIComponent()`, and `decodeURIComponent()` from the httpuv package
+  instead of `utils::URLencode()` and `utils::URLdecode()`. (#630)
+
+* Shiny's web assets are now minified.
+
+* The default reactive domain is now available in event handler functions. (#669)
+
+* Password input fields can now be used, with `passwordInput()`. (#672)
+
+shiny 0.10.2.2
+--------------------------------------------------------------------------------
+
+* Remove use of `rstudio::viewer` in a code example, for R CMD check.
+
+shiny 0.10.2.1
+--------------------------------------------------------------------------------
+
+* Changed some examples to use \donttest instead of \dontrun.
+
+shiny 0.10.2
+--------------------------------------------------------------------------------
+
+* The minimal version of R required for the shiny package is 3.0.0 now.
+
+* Shiny apps can now consist of a single file, app.R, instead of ui.R and
+  server.R.
+
+* Upgraded DataTables from 1.9.4 to 1.10.2. This might be a breaking change if
+  you have customized the DataTables options in your apps. (More info:
+  https://github.com/rstudio/shiny/pull/558)
+
+* File uploading via `fileInput()` works for Internet Explorer 8 and 9 now. Note
+  IE8/9 do not support multiple files from a single file input. If you need to
+  upload multiple files, you have to use one file input for each file.
+
+* Switched away from reference classes to R6.
+
+* Reactive log performance has been greatly improved.
+
+* Added `Progress` and `withProgress`, to display the progress of computation
+  on the client browser.
+
+* Fixed #557: updateSelectizeInput(choices, server = TRUE) did not work when
+  `choices` is a character vector.
+
+* Searching in DataTables is case-insensitive and the search strings are not
+  treated as regular expressions by default now. If you want case-sensitive
+  searching or regular expressions, you can use the configuration options
+  `search$caseInsensitive` and `search$regex`, e.g. `renderDataTable(...,
+  options = list(search = list(caseInsensitve = FALSE, regex = TRUE)))`.
+
+* Added support for `htmltools::htmlDependency`'s new `attachment` parameter to
+  `renderUI`/`uiOutput`.
+
+* Exported `createWebDependency`. It takes an `htmltools::htmlDependency` object
+  and makes it available over Shiny's built-in web server.
+
+* Custom output bindings can now render `htmltools::htmlDependency` objects at
+  runtime using `Shiny.renderDependencies()`.
+
+* Fixes to rounding behavior of sliderInput. (#301, #502)
+
+* Updated selectize.js to version 0.11.2. (#596)
+* Added `position` parameter to `navbarPage`.
+
+shiny 0.10.1
+--------------------------------------------------------------------------------
+
+* Added Unicode support for Windows. Shiny apps running on Windows must use the
+  UTF-8 encoding for ui.R and server.R (also the optional global.R) if they
+  contain non-ASCII characters. See this article for details and examples:
+  http://shiny.rstudio.com/gallery/unicode-characters.html (#516)
+
+* `runGitHub()` also allows the 'username/repo' syntax now, which is equivalent
+  to `runGitHub('repo', 'username')`. (#427)
+
+* `navbarPage()` now accepts a `windowTitle` parameter to set the web browser
+  page title to something other than the title displayed in the navbar.
+
+* Added an `inline` argument to `textOutput()`, `imageOutput()`, `plotOutput()`,
+  and `htmlOutput()`. When `inline = TRUE`, these outputs will be put in
+  `span()` instead of the default `div()`. This occurs automatically when these
+  outputs are created via the inline expressions (e.g. `r renderText(expr)`) in
+  R Markdown documents. See an R Markdown example at
+  http://shiny.rstudio.com/gallery/inline-output.html (#512)
+
+* Added support for option groups in the select/selectize inputs. When the
+  `choices` argument for `selectInput()`/`selectizeInput()` is a list of
+  sub-lists and any sub-list is of length greater than 1, the HTML tag
+  `<optgroup>` will be used. See an example at
+  http://shiny.rstudio.com/gallery/option-groups-for-selectize-input.html (#542)
+
+shiny 0.10.0
 --------------------------------------------------------------------------------
 
 * BREAKING CHANGE: By default, observers now terminate themselves if they were
   created during a session and that session ends. See ?domains for more details.
 
+* Shiny can now be used in R Markdown v2 documents, to create "Shiny Docs":
+  reports and presentations that combine narrative, statically computed output,
+  and fully dynamic inputs and outputs. For more info, including examples, see
+  http://rmarkdown.rstudio.com/authoring_shiny.html.
+
+* The `session` object that can be passed into a server function (e.g.
+  shinyServer(function(input, output, session) {...})) is now documented: see
+  `?session`.
+
 * Most inputs can now accept `NULL` label values to omit the label altogether.
 
 * New `actionLink` input control; like `actionButton`, but with the appearance
@@ -12,20 +409,39 @@ shiny 0.9.1.9XXX
 * `renderPlot` now calls `print` on its result if it's visible (i.e. no more
   explicit `print()` required for ggplot2).
 
+* Introduced Shiny app objects (see `?shinyApp`). These essentially replace the
+  little-advertised ability for `runApp` to take a `list(ui=..., server=...)`
+  as the first argument instead of a directory (though that ability remains for
+  backward compatibility). Unlike those lists, Shiny app objects are tagged with
+  class `shiny.appobj` so they can be run simply by printing them.
+
 * Added `maskReactiveContext` function. It blocks the current reactive context,
   to evaluate expressions that shouldn't use reactive sources directly. (This
   should not be commonly needed.)
 
 * Added `flowLayout`, `splitLayout`, and `inputPanel` functions for putting UI
-  elements side by side. `flowPanel` lays out its children in a left-to-right,
+  elements side by side. `flowLayout` lays out its children in a left-to-right,
   top-to-bottom arrangement. `splitLayout` evenly divides its horizontal space
   among its children (or unevenly divides if `cellWidths` argument is provided).
   `inputPanel` is like `flowPanel`, but with a light grey background, and is
   intended to be used to encapsulate small input controls wherever vertical
   space is at a premium.
 
+* Added `serverInfo` to obtain info about the Shiny Server if the app is served
+  through it.
+
+* Added an `inline` argument (TRUE/FALSE) in `checkboxGroupInput()` and
+  `radioButtons()` to allow the horizontal layout (inline = TRUE) of checkboxes
+  or radio buttons. (Thanks, @saurfang, #481)
+
 * `sliderInput` and `selectizeInput`/`selectInput` now use a standard horizontal
-  size instead of filling up all available horizontal space.
+  size instead of filling up all available horizontal space. Pass `width="100%"`
+  explicitly for the old behavior.
+
+* Added the `updateSelectizeInput()` function to make it possible to process
+  searching on the server side (i.e. using R), which can be much faster than the
+  client side processing (i.e. using HTML and JavaScript). See the article at
+  http://shiny.rstudio.com/articles/selectize.html for a detailed introduction.
 
 * Fixed a bug of renderDataTable() when the data object only has 1 row and 1
   column. (Thanks, ZJ Dai, #429)
@@ -36,6 +452,10 @@ shiny 0.9.1.9XXX
 * Fixed #220: the zip file for a directory created by some programs may not have
   the directory name as its first entry, in which case runUrl() can fail. (#220)
 
+* `runGitHub()` can also take a value of the form "username/repo" in its first
+  argument, e.g. both runGitHub("shiny_example", "rstudio") and
+  runGitHub("rstudio/shiny_example") are valid ways to run the GitHub repo.
+
 shiny 0.9.1
 --------------------------------------------------------------------------------
 

R/app.R

@@ -3,11 +3,16 @@
 #' Create a Shiny app object
 #'
 #' These functions create Shiny app objects from either an explicit UI/server
-#' pair (\code{shinyApp}), or by passing the path of a directory that
-#' contains a Shiny app (\code{shinyAppDir}). You generally shouldn't need to
-#' use these functions to create/run applications; they are intended for
-#' interoperability purposes, such as embedding Shiny apps inside a \pkg{knitr}
-#' document.
+#' pair (\code{shinyApp}), or by passing the path of a directory that contains a
+#' Shiny app (\code{shinyAppDir}). You generally shouldn't need to use these
+#' functions to create/run applications; they are intended for interoperability
+#' purposes, such as embedding Shiny apps inside a \pkg{knitr} document.
+#'
+#' Normally when this function is used at the R console, the Shiny app object is
+#' automatically passed to the \code{print()} function, which runs the app. If
+#' this is called in the middle of a function, the value will not be passed to
+#' \code{print()} and the app will not be run. To make the app run, pass the app
+#' object to \code{print()} or \code{\link{runApp}()}.
 #'
 #' @param ui The UI definition of the app (for example, a call to
 #'   \code{fluidPage()} with nested controls)
@@ -22,55 +27,50 @@
 #'   request to determine whether the \code{ui} should be used to handle the
 #'   request. Note that the entire request path must match the regular
 #'   expression in order for the match to be considered successful.
-#' @return An object that represents the app. Printing the object will run the
-#'   app.
+#' @return An object that represents the app. Printing the object or passing it
+#'   to \code{\link{runApp}} will run the app.
 #'
 #' @examples
-#' \dontrun{
-#' shinyApp(
-#'   ui = fluidPage(
-#'     numericInput("n", "n", 1),
-#'     plotOutput("plot")
-#'   ),
-#'   server = function(input, output) {
-#'     output$plot <- renderPlot( plot(head(cars, input$n)) )
-#'   },
-#'   options=list(launch.browser = rstudio::viewer)
-#' )
+#' ## Only run this example in interactive R sessions
+#' if (interactive()) {
+#'   shinyApp(
+#'     ui = fluidPage(
+#'       numericInput("n", "n", 1),
+#'       plotOutput("plot")
+#'     ),
+#'     server = function(input, output) {
+#'       output$plot <- renderPlot( plot(head(cars, input$n)) )
+#'     }
+#'   )
 #'
-#' shinyAppDir(system.file("examples/01_hello", package="shiny"))
+#'   shinyAppDir(system.file("examples/01_hello", package="shiny"))
+#'
+#'
+#'   # The object can be passed to runApp()
+#'   app <- shinyApp(
+#'     ui = fluidPage(
+#'       numericInput("n", "n", 1),
+#'       plotOutput("plot")
+#'     ),
+#'     server = function(input, output) {
+#'       output$plot <- renderPlot( plot(head(cars, input$n)) )
+#'     }
+#'   )
+#'
+#'   runApp(app)
 #' }
 #'
 #' @export
-shinyApp <- function(ui, server, onStart=NULL, options=list(), uiPattern="/") {
+shinyApp <- function(ui=NULL, server=NULL, onStart=NULL, options=list(),
+                     uiPattern="/") {
+  if (is.null(server)) {
+    stop("`server` missing from shinyApp")
+  }
+
   # Ensure that the entire path is a match
   uiPattern <- sprintf("^%s$", uiPattern)
 
-  httpHandler <- function(req) {
-    if (!identical(req$REQUEST_METHOD, 'GET'))
-      return(NULL)
-
-    if (!isTRUE(grepl(uiPattern, req$PATH_INFO)))
-      return(NULL)
-
-    textConn <- textConnection(NULL, "w")
-    on.exit(close(textConn))
-
-    uiValue <- if (is.function(ui)) {
-      if (length(formals(ui)) > 0)
-        ui(req)
-      else
-        ui()
-    } else {
-      ui
-    }
-    if (is.null(uiValue))
-      return(NULL)
-
-    renderPage(uiValue, textConn)
-    html <- paste(textConnectionValue(textConn), collapse='\n')
-    return(httpResponse(200, content=html))
-  }
+  httpHandler <- uiHttpHandler(ui, uiPattern)
 
   serverFuncSource <- function() {
     server
@@ -91,10 +91,7 @@ shinyApp <- function(ui, server, onStart=NULL, options=list(), uiPattern="/") {
 #'   file and either ui.R or www/index.html)
 #' @export
 shinyAppDir <- function(appDir, options=list()) {
-  # Most of the complexity here comes from needing to hot-reload if the .R files
-  # change on disk, or are created, or are removed.
-
-  if (!file.exists(appDir)) {
+  if (!utils::file_test('-d', appDir)) {
     stop("No Shiny application exists at the path \"", appDir, "\"")
   }
 
@@ -102,6 +99,29 @@ shinyAppDir <- function(appDir, options=list()) {
   # affected by future changes to the path)
   appDir <- normalizePath(appDir, mustWork = TRUE)
 
+  if (file.exists.ci(appDir, "server.R")) {
+    shinyAppDir_serverR(appDir, options = options)
+  } else if (file.exists.ci(appDir, "app.R")) {
+    shinyAppDir_appR("app.R", appDir, options = options)
+  } else {
+    stop("App dir must contain either app.R or server.R.")
+  }
+}
+
+#' @rdname shinyApp
+#' @param appFile Path to a .R file containing a Shiny application
+#' @export
+shinyAppFile <- function(appFile, options=list()) {
+  appFile <- normalizePath(appFile, mustWork = TRUE)
+  shinyAppDir_appR(basename(appFile), dirname(appFile), options = options)
+}
+
+# This reads in an app dir in the case that there's a server.R (and ui.R/www)
+# present, and returns a shiny.appobj.
+shinyAppDir_serverR <- function(appDir, options=list()) {
+  # Most of the complexity here comes from needing to hot-reload if the .R files
+  # change on disk, or are created, or are removed.
+
   # uiHandlerSource is a function that returns an HTTP handler for serving up
   # ui.R as a webpage. The "cachedFuncWithFile" call makes sure that the closure
   # we're creating here only gets executed when ui.R's contents change.
@@ -112,9 +132,7 @@ shinyAppDir <- function(appDir, options=list()) {
         # If not, then take the last expression that's returned from ui.R.
         .globals$ui <- NULL
         on.exit(.globals$ui <- NULL, add = FALSE)
-        ui <- source(uiR,
-          local = new.env(parent = globalenv()),
-          keep.source = TRUE)$value
+        ui <- sourceUTF8(uiR, envir = new.env(parent = globalenv()))
         if (!is.null(.globals$ui)) {
           ui <- .globals$ui[[1]]
         }
@@ -137,11 +155,7 @@ shinyAppDir <- function(appDir, options=list()) {
       # server.R.
       .globals$server <- NULL
       on.exit(.globals$server <- NULL, add = TRUE)
-      result <- source(
-        serverR,
-        local = new.env(parent = globalenv()),
-        keep.source = TRUE
-      )$value
+      result <- sourceUTF8(serverR, envir = new.env(parent = globalenv()))
       if (!is.null(.globals$server)) {
         result <- .globals$server[[1]]
       }
@@ -165,14 +179,18 @@ shinyAppDir <- function(appDir, options=list()) {
   }
 
   oldwd <- NULL
+  monitorHandle <- NULL
   onStart <- function() {
     oldwd <<- getwd()
     setwd(appDir)
+    monitorHandle <<- initAutoReloadMonitor(appDir)
     if (file.exists(file.path.ci(appDir, "global.R")))
-      source(file.path.ci(appDir, "global.R"), keep.source = TRUE)
+      sourceUTF8(file.path.ci(appDir, "global.R"))
   }
   onEnd <- function() {
     setwd(oldwd)
+    monitorHandle()
+    monitorHandle <<- NULL
   }
 
   structure(
@@ -186,6 +204,110 @@ shinyAppDir <- function(appDir, options=list()) {
   )
 }
 
+# Start a reactive observer that continually monitors dir for changes to files
+# that have the extensions: r, htm, html, js, css, png, jpg, jpeg, gif. Case is
+# ignored when checking extensions. If any changes are detected, all connected
+# Shiny sessions are reloaded.
+#
+# Use option(shiny.autoreload = TRUE) to enable this behavior. Since monitoring
+# for changes is expensive (we are polling for mtimes here, nothing fancy) this
+# feature is intended only for development.
+#
+# You can customize the file patterns Shiny will monitor by setting the
+# shiny.autoreload.pattern option. For example, to monitor only ui.R:
+# option(shiny.autoreload.pattern = glob2rx("ui.R"))
+#
+# The return value is a function that halts monitoring when called.
+initAutoReloadMonitor <- function(dir) {
+  if (!getOption("shiny.autoreload", FALSE)) {
+    return(function(){})
+  }
+
+  filePattern <- getOption("shiny.autoreload.pattern",
+    ".*\\.(r|html?|js|css|png|jpe?g|gif)$")
+
+  lastValue <- NULL
+  obs <- observe({
+    files <- sort(list.files(dir, pattern = filePattern, recursive = TRUE,
+      ignore.case = TRUE))
+    times <- file.info(files)$mtime
+    names(times) <- files
+
+    if (is.null(lastValue)) {
+      # First run
+      lastValue <<- times
+    } else if (!identical(lastValue, times)) {
+      # We've changed!
+      lastValue <<- times
+      for (session in appsByToken$values()) {
+        session$reload()
+      }
+    }
+
+    invalidateLater(getOption("shiny.autoreload.interval", 500))
+  })
+
+  obs$destroy
+}
+
+# This reads in an app dir for a single-file application (e.g. app.R), and
+# returns a shiny.appobj.
+shinyAppDir_appR <- function(fileName, appDir, options=list()) {
+  fullpath <- file.path.ci(appDir, fileName)
+
+  # This sources app.R and caches the content. When appObj() is called but
+  # app.R hasn't changed, it won't re-source the file. But if called and
+  # app.R has changed, it'll re-source the file and return the result.
+  appObj <- cachedFuncWithFile(appDir, fileName, case.sensitive = FALSE,
+    function(appR) {
+      result <- sourceUTF8(fullpath, envir = new.env(parent = globalenv()))
+
+      if (!is.shiny.appobj(result))
+        stop("app.R did not return a shiny.appobj object.")
+
+      return(result)
+    }
+  )
+
+  # A function that invokes the http handler from the appObj in app.R, but
+  # since this uses appObj(), it only re-sources the file when it changes.
+  dynHttpHandler <- function(...) {
+    appObj()$httpHandler(...)
+  }
+
+  dynServerFuncSource <- function(...) {
+    appObj()$serverFuncSource(...)
+  }
+
+  wwwDir <- file.path.ci(appDir, "www")
+  fallbackWWWDir <- system.file("www-dir", package = "shiny")
+
+  oldwd <- NULL
+  monitorHandle <- NULL
+  onStart <- function() {
+    oldwd <<- getwd()
+    setwd(appDir)
+    monitorHandle <<- initAutoReloadMonitor(appDir)
+  }
+  onEnd <- function() {
+    setwd(oldwd)
+    monitorHandle()
+    monitorHandle <<- NULL
+  }
+
+  structure(
+    list(
+      httpHandler = joinHandlers(c(dynHttpHandler, wwwDir, fallbackWWWDir)),
+      serverFuncSource = dynServerFuncSource,
+      onStart = onStart,
+      onEnd = onEnd,
+      options = options
+    ),
+    class = "shiny.appobj"
+  )
+}
+
+
 #' @rdname shinyApp
 #' @param x Object to convert to a Shiny app.
 #' @export
@@ -208,7 +330,16 @@ as.shiny.appobj.list <- function(x) {
 #' @rdname shinyApp
 #' @export
 as.shiny.appobj.character <- function(x) {
-  shinyAppDir(x)
+  if (identical(tolower(tools::file_ext(x)), "r"))
+    shinyAppFile(x)
+  else
+    shinyAppDir(x)
+}
+
+#' @rdname shinyApp
+#' @export
+is.shiny.appobj <- function(x) {
+  inherits(x, "shiny.appobj")
 }
 
 #' @rdname shinyApp
@@ -224,6 +355,34 @@ print.shiny.appobj <- function(x, ...) {
   do.call(runApp, args)
 }
 
+#' @rdname shinyApp
+#' @method as.tags shiny.appobj
+#' @export
+as.tags.shiny.appobj <- function(x, ...) {
+  # jcheng 06/06/2014: Unfortunate copy/paste between this function and
+  # knit_print.shiny.appobj, but I am trying to make the most conservative
+  # change possible due to upcoming release.
+  opts <- x$options %OR% list()
+  width <- if (is.null(opts$width)) "100%" else opts$width
+  height <- if (is.null(opts$height)) "400" else opts$height
+
+  path <- addSubApp(x)
+  deferredIFrame(path, width, height)
+}
+
+# Generate subapp iframes in such a way that they will not actually load right
+# away. Loading subapps immediately upon app load can result in a storm of
+# connections, all of which are contending for the few concurrent connections
+# that a browser will make to a specific origin. Instead, we load dummy iframes
+# and let the client load them when convenient. (See the initIframes function in
+# init_shiny.js.)
+deferredIFrame <- function(path, width, height) {
+  tags$iframe("data-deferred-src" = path,
+    width = width, height = height,
+    class = "shiny-frame shiny-frame-deferred"
+  )
+}
+
 #' Knitr S3 methods
 #'
 #' These S3 methods are necessary to help Shiny applications and UI chunks embed
@@ -234,26 +393,33 @@ print.shiny.appobj <- function(x, ...) {
 #' @param ... Additional knit_print arguments
 NULL
 
+# If there's an R Markdown runtime option set but it isn't set to Shiny, then
+# return a warning indicating the runtime is inappropriate for this object.
+# Returns NULL in all other cases.
+shiny_rmd_warning <- function() {
+  runtime <- knitr::opts_knit$get("rmarkdown.runtime")
+  if (!is.null(runtime) && runtime != "shiny")
+    # note that the RStudio IDE checks for this specific string to detect Shiny
+    # applications in static document
+    list(structure(
+      "Shiny application in a static R Markdown document",
+      class = "rmd_warning"))
+  else
+    NULL
+}
+
 #' @rdname knitr_methods
 #' @export
 knit_print.shiny.appobj <- function(x, ...) {
   opts <- x$options %OR% list()
   width <- if (is.null(opts$width)) "100%" else opts$width
   height <- if (is.null(opts$height)) "400" else opts$height
-  shiny_warning <- NULL
-  # if there's an R Markdown runtime option set but it isn't set to Shiny, then
-  # emit a warning indicating the runtime is inappropriate for this object
+
   runtime <- knitr::opts_knit$get("rmarkdown.runtime")
   if (!is.null(runtime) && runtime != "shiny") {
-    # note that the RStudio IDE checks for this specific string to detect Shiny
-    # applications in static document
-    shiny_warning <- list(structure(
-      "Shiny application in a static R Markdown document",
-      class = "rmd_warning"))
-
-    # create a box exactly the same dimensions as the Shiny app would have had
-    # (so the document continues to flow as it would have with the app), and
-    # display a diagnostic message
+    # If not rendering to a Shiny document, create a box exactly the same
+    # dimensions as the Shiny app would have had (so the document continues to
+    # flow as it would have with the app), and display a diagnostic message
     width <- validateCssUnit(width)
     height <- validateCssUnit(height)
     output <- tags$div(
@@ -265,59 +431,38 @@ knit_print.shiny.appobj <- function(x, ...) {
   }
   else {
     path <- addSubApp(x)
-    output <- tags$iframe(src=path, width=width, height=height,
-                          class="shiny-frame")
+    output <- deferredIFrame(path, width, height)
   }
 
   # If embedded Shiny apps ever have JS/CSS dependencies (like pym.js) we'll
   # need to grab those and put them in meta, like in knit_print.shiny.tag. But
   # for now it's not an issue, so just return the HTML and warning.
 
-  knitr::asis_output(html_preserve(format(output, indent=FALSE)),
-                     meta = shiny_warning, cacheable = FALSE)
+  knitr::asis_output(htmlPreserve(format(output, indent=FALSE)),
+                     meta = shiny_rmd_warning(), cacheable = FALSE)
 }
 
-#' @rdname knitr_methods
-#' @export
-knit_print.shiny.tag <- function(x, ...) {
-  output <- surroundSingletons(x)
-  deps <- getNewestDeps(findDependencies(x))
-  content <- takeHeads(output)
-  head_content <- doRenderTags(tagList(content$head))
-
-  meta <- if (length(head_content) > 1 || head_content != "") {
-    list(structure(head_content, class = "shiny_head"))
-  }
-  meta <- c(meta, deps)
-
-  knitr::asis_output(html_preserve(format(content$ui, indent=FALSE)), meta = meta)
-}
-
-knit_print.html <- function(x, ...) {
-  deps <- getNewestDeps(findDependencies(x))
-  knitr::asis_output(html_preserve(as.character(x)),
-                     meta = if (length(deps)) list(deps))
-}
-
-#' @rdname knitr_methods
-#' @export
-knit_print.shiny.tag.list <- knit_print.shiny.tag
-
-
-# Lets us use a nicer syntax in knitr chunks than literally
+# Let us use a nicer syntax in knitr chunks than literally
 # calling output$value <- renderFoo(...) and fooOutput().
 #' @rdname knitr_methods
+#' @param inline Whether the object is printed inline.
 #' @export
-knit_print.shiny.render.function <- function(x, ...) {
+knit_print.shiny.render.function <- function(x, ..., inline = FALSE) {
+  x <- htmltools::as.tags(x, inline = inline)
   output <- knitr::knit_print(tagList(x))
   attr(output, "knit_cacheable") <- FALSE
+  attr(output, "knit_meta") <- append(attr(output, "knit_meta"),
+                                      shiny_rmd_warning())
   output
 }
 
-html_preserve <- function(x) {
-  x <- paste(x, collapse = "\r\n")
-  if (nzchar(x))
-    sprintf("<!--html_preserve-->%s<!--/html_preserve-->", x)
-  else
-    x
+# Lets us drop reactive expressions directly into a knitr chunk and have the
+# value printed out! Nice for teaching if nothing else.
+#' @rdname knitr_methods
+#' @export
+knit_print.reactive <- function(x, ..., inline = FALSE) {
+  renderFunc <- if (inline) renderText else renderPrint
+  knitr::knit_print(renderFunc({
+    x()
+  }), inline = inline)
 }

R/bootstrap-layout.R

@@ -11,8 +11,8 @@
 #' @param ... Elements to include within the page
 #' @param title The browser window title (defaults to the host URL of the page).
 #'   Can also be set as a side effect of the \code{\link{titlePanel}} function.
-#' @param responsive \code{TRUE} to use responsive layout (automatically adapt
-#'   and resize page elements based on the size of the viewing device)
+#' @param responsive This option is deprecated; it is no longer optional with
+#'   Bootstrap 3.
 #' @param theme Alternative Bootstrap stylesheet (normally a css file within the
 #'   www directory). For example, to use the theme located at
 #'   \code{www/bootstrap.css} you would use \code{theme = "bootstrap.css"}.
@@ -24,9 +24,8 @@
 #'   alternative to low-level row and column functions you can also use
 #'   higher-level layout functions like \code{\link{sidebarLayout}}.
 #'
-#' @note See the
-#'   \href{https://github.com/rstudio/shiny/wiki/Shiny-Application-Layout-Guide}{
-#'    Shiny-Application-Layout-Guide} for additional details on laying out fluid
+#' @note See the \href{http://shiny.rstudio.com/articles/layout-guide.html}{
+#'   Shiny-Application-Layout-Guide} for additional details on laying out fluid
 #'   pages.
 #'
 #' @seealso \code{\link{column}}, \code{\link{sidebarLayout}}
@@ -69,7 +68,7 @@
 #'
 #' @rdname fluidPage
 #' @export
-fluidPage <- function(..., title = NULL, responsive = TRUE, theme = NULL) {
+fluidPage <- function(..., title = NULL, responsive = NULL, theme = NULL) {
   bootstrapPage(div(class = "container-fluid", ...),
                 title = title,
                 responsive = responsive,
@@ -80,7 +79,7 @@ fluidPage <- function(..., title = NULL, responsive = TRUE, theme = NULL) {
 #' @rdname fluidPage
 #' @export
 fluidRow <- function(...) {
-  div(class = "row-fluid", ...)
+  div(class = "row", ...)
 }
 
 #' Create a page with a fixed layout
@@ -95,8 +94,8 @@ fluidRow <- function(...) {
 #'
 #' @param ... Elements to include within the container
 #' @param title The browser window title (defaults to the host URL of the page)
-#' @param responsive \code{TRUE} to use responsive layout (automatically adapt
-#'   and resize page elements based on the size of the viewing device)
+#' @param responsive This option is deprecated; it is no longer optional with
+#'   Bootstrap 3.
 #' @param theme Alternative Bootstrap stylesheet (normally a css file within the
 #'   www directory). For example, to use the theme located at
 #'   \code{www/bootstrap.css} you would use \code{theme = "bootstrap.css"}.
@@ -109,8 +108,7 @@ fluidRow <- function(...) {
 #'   layout functions like \code{sidebarLayout}, rather, all layout must be done
 #'   with \code{fixedRow} and \code{column}.
 #'
-#' @note See the
-#'   \href{https://github.com/rstudio/shiny/wiki/Shiny-Application-Layout-Guide}{
+#' @note See the \href{http://shiny.rstudio.com/articles/layout-guide.html}{
 #'   Shiny Application Layout Guide} for additional details on laying out fixed
 #'   pages.
 #'
@@ -131,7 +129,7 @@ fluidRow <- function(...) {
 #'
 #' @rdname fixedPage
 #' @export
-fixedPage <- function(..., title = NULL, responsive = TRUE, theme = NULL) {
+fixedPage <- function(..., title = NULL, responsive = NULL, theme = NULL) {
   bootstrapPage(div(class = "container", ...),
                 title = title,
                 responsive = responsive,
@@ -186,9 +184,9 @@ column <- function(width, ..., offset = 0) {
   if (!is.numeric(width) || (width < 1) || (width > 12))
     stop("column width must be between 1 and 12")
 
-  colClass <- paste0("span", width)
+  colClass <- paste0("col-sm-", width)
   if (offset > 0)
-    colClass <- paste0(colClass, " offset", offset)
+    colClass <- paste0(colClass, " col-sm-offset-", offset)
   div(class = colClass, ...)
 }
 
@@ -210,7 +208,7 @@ column <- function(width, ..., offset = 0) {
 titlePanel <- function(title, windowTitle=title) {
   tagList(
     tags$head(tags$title(windowTitle)),
-    h2(style = "padding: 10px 0px;", title)
+    h2(title)
   )
 }
 
@@ -310,8 +308,8 @@ verticalLayout <- function(..., fluid = TRUE) {
 #'
 #' Lays out elements in a left-to-right, top-to-bottom arrangement. The elements
 #' on a given row will be top-aligned with each other. This layout will not work
-#' well with elements that have a percentage-based width (e.g. `plotOutput` at
-#' its default setting of `width = "100%"`).
+#' well with elements that have a percentage-based width (e.g.
+#' \code{\link{plotOutput}} at its default setting of \code{width = "100\%"}).
 #'
 #' @param ... Unnamed arguments will become child elements of the layout. Named
 #'   arguments will become HTML attributes on the outermost tag.
@@ -320,7 +318,7 @@ verticalLayout <- function(..., fluid = TRUE) {
 #'
 #' @seealso \code{\link{verticalLayout}}
 #'
-#' #' @examples
+#' @examples
 #' flowLayout(
 #'   numericInput("rows", "How many rows?", 5),
 #'   selectInput("letter", "Which letter?", LETTERS),
@@ -370,7 +368,7 @@ inputPanel <- function(...) {
 #' @param cellArgs Any additional attributes that should be used for each cell
 #'   of the layout.
 #'
-#' #' @examples
+#' @examples
 #' # Equal sizing
 #' splitLayout(
 #'   plotOutput("plot1"),
@@ -419,3 +417,197 @@ splitLayout <- function(..., cellWidths = NULL, cellArgs = list()) {
     }, SIMPLIFY = FALSE)
   ))
 }
+
+#' Flex Box-based row/column layouts
+#'
+#' Creates row and column layouts with proportionally-sized cells, using the
+#' Flex Box layout model of CSS3. These can be nested to create arbitrary
+#' proportional-grid layouts. \strong{Warning:} Flex Box is not well supported
+#' by Internet Explorer, so these functions should only be used where modern
+#' browsers can be assumed.
+#'
+#' @details If you try to use \code{fillRow} and \code{fillCol} inside of other
+#'   Shiny containers, such as \code{\link{sidebarLayout}},
+#'   \code{\link{navbarPage}}, or even \code{tags$div}, you will probably find
+#'   that they will not appear. This is due to \code{fillRow} and \code{fillCol}
+#'   defaulting to \code{height="100\%"}, which will only work inside of
+#'   containers that have determined their own size (rather than shrinking to
+#'   the size of their contents, as is usually the case in HTML).
+#'
+#'   To avoid this problem, you have two options:
+#'   \itemize{
+#'     \item only use \code{fillRow}/\code{fillCol} inside of \code{fillPage},
+#'       \code{fillRow}, or \code{fillCol}
+#'     \item provide an explicit \code{height} argument to
+#'       \code{fillRow}/\code{fillCol}
+#'   }
+#'
+#' @param ... UI objects to put in each row/column cell; each argument will
+#'   occupy a single cell. (To put multiple items in a single cell, you can use
+#'   \code{\link{tagList}} or \code{\link{div}} to combine them.) Named
+#'   arguments will be used as attributes on the \code{div} element that
+#'   encapsulates the row/column.
+#' @param flex Determines how space should be distributed to the cells. Can be a
+#'   single value like \code{1} or \code{2} to evenly distribute the available
+#'   space; or use a vector of numbers to specify the proportions. For example,
+#'   \code{flex = c(2, 3)} would cause the space to be split 40\%/60\% between
+#'   two cells. NA values will cause the corresponding cell to be sized
+#'   according to its contents (without growing or shrinking).
+#' @param width,height The total amount of width and height to use for the
+#'   entire row/column. For the default height of \code{"100\%"} to be
+#'   effective, the parent must be \code{fillPage}, another
+#'   \code{fillRow}/\code{fillCol}, or some other HTML element whose height is
+#'   not determined by the height of its contents.
+#'
+#' @examples
+#' \donttest{
+#' # Only run this example in interactive R sessions.
+#' # NOTE: This example should be run with example(fillRow, ask = FALSE) to
+#' # avoid being prompted to hit Enter during plot rendering.
+#' if (interactive()) {
+#'
+#' ui <- fillPage(fillRow(
+#'   plotOutput("plotLeft", height = "100%"),
+#'   fillCol(
+#'     plotOutput("plotTopRight", height = "100%"),
+#'     plotOutput("plotBottomRight", height = "100%")
+#'   )
+#' ))
+#'
+#' server <- function(input, output, session) {
+#'   output$plotLeft <- renderPlot(plot(cars))
+#'   output$plotTopRight <- renderPlot(plot(pressure))
+#'   output$plotBottomRight <- renderPlot(plot(AirPassengers))
+#' }
+#'
+#' shinyApp(ui, server)
+#'
+#' }
+#' }
+#' @export
+fillRow <- function(..., flex = 1, width = "100%", height = "100%") {
+  flexfill(..., direction = "row", flex = flex, width = width, height = height)
+}
+
+#' @rdname fillRow
+#' @export
+fillCol <- function(..., flex = 1, width = "100%", height = "100%") {
+  flexfill(..., direction = "column", flex = flex, width = width, height = height)
+}
+
+flexfill <- function(..., direction, flex, width = width, height = height) {
+  children <- list(...)
+  attrs <- list()
+
+  if (!is.null(names(children))) {
+    attrs <- children[names(children) != ""]
+    children <- children[names(children) == ""]
+  }
+
+  if (length(flex) > length(children)) {
+    flex <- flex[1:length(children)]
+  }
+
+  # The dimension along the main axis
+  main <- switch(direction,
+    row = "width",
+    "row-reverse" = "width",
+    column = "height",
+    "column-reverse" = "height",
+    stop("Unexpected direction")
+  )
+  # The dimension along the cross axis
+  cross <- if (main == "width") "height" else "width"
+
+  divArgs <- list(
+    class = sprintf("flexfill-container flexfill-container-%s", direction),
+    style = css(
+      display = "-webkit-flex",
+      display = "-ms-flexbox",
+      display = "flex",
+      .webkit.flex.direction = direction,
+      .ms.flex.direction = direction,
+      flex.direction = direction,
+      width = validateCssUnit(width),
+      height = validateCssUnit(height)
+    ),
+    mapply(children, flex, FUN = function(el, flexValue) {
+      if (is.na(flexValue)) {
+        # If the flex value is NA, then put the element in a simple flex item
+        # that sizes itself (along the main axis) to its contents
+        tags$div(
+          class = "flexfill-item",
+          style = css(
+            position = "relative",
+            "-webkit-flex" = "none",
+            "-ms-flex" = "none",
+            flex = "none"
+          ),
+          style = paste0(main, ":auto;", cross, ":100%;"),
+          el
+        )
+      } else if (is.numeric(flexValue)) {
+        # If the flex value is numeric, we need *two* wrapper divs. The outer is
+        # the flex item, and the inner is an absolute-fill div that is needed to
+        # make percentage-based sizing for el work correctly. I don't understand
+        # why this is needed but the truth is probably in this SO page:
+        # http://stackoverflow.com/questions/15381172/css-flexbox-child-height-100
+        tags$div(
+          class = "flexfill-item",
+          style = css(
+            position = "relative",
+            "-webkit-flex" = flexValue,
+            "-ms-flex" = flexValue,
+            flex = flexValue,
+            width = "100%", height = "100%"
+          ),
+          tags$div(
+            class = "flexfill-item-inner",
+            style = css(
+              position = "absolute",
+              top = 0, left = 0, right = 0, bottom = 0
+            ),
+            el
+          )
+        )
+      } else {
+        stop("Unexpected flex argument: ", flexValue)
+      }
+    }, SIMPLIFY = FALSE, USE.NAMES = FALSE)
+  )
+  do.call(tags$div, c(attrs, divArgs))
+}
+
+css <- function(..., collapse_ = "") {
+  props <- list(...)
+  if (length(props) == 0) {
+    return("")
+  }
+
+  if (is.null(names(props)) || any(names(props) == "")) {
+    stop("cssList expects all arguments to be named")
+  }
+
+  # Necessary to make factors show up as level names, not numbers
+  props[] <- lapply(props, paste, collapse = " ")
+
+  # Drop null args
+  props <- props[!sapply(props, empty)]
+  if (length(props) == 0) {
+    return("")
+  }
+
+  # Replace all '.' and '_' in property names to '-'
+  names(props) <- gsub("[._]", "-", tolower(gsub("([A-Z])", "-\\1", names(props))))
+
+  # Create "!important" suffix for each property whose name ends with !, then
+  # remove the ! from the property name
+  important <- ifelse(grepl("!$", names(props), perl = TRUE), " !important", "")
+  names(props) <- sub("!$", "", names(props), perl = TRUE)
+
+  paste0(names(props), ":", props, important, ";", collapse = collapse_)
+}
+
+empty <- function(x) {
+  length(x) == 0 || (is.character(x) && !any(nzchar(x)))
+}

R/cache.R

@@ -2,18 +2,15 @@
 # files changes on disk. Each time the cache is dirtied, the set of files is
 # cleared. Therefore, the set of files needs to be re-built each time the cached
 # code executes. This approach allows for dynamic dependency graphs.
-CacheContext <- setRefClass(
+CacheContext <- R6Class(
   'CacheContext',
-  fields = list(
-    .dirty = 'logical',
-    .tests = 'list'
-  ),
-  methods = list(
-    initialize = function() {
-      .dirty <<- TRUE
-      # List of functions that return TRUE if dirty
-      .tests <<- list()
-    },
+  portable = FALSE,
+  class = FALSE,
+  public = list(
+    .dirty = TRUE,
+    # List of functions that return TRUE if dirty
+    .tests = list(),
+
     addDependencyFile = function(file) {
       if (.dirty)
         return()
@@ -53,7 +50,7 @@ CacheContext <- setRefClass(
     },
     with = function(func) {
       oldCC <- .currentCacheContext$cc
-      .currentCacheContext$cc <- .self
+      .currentCacheContext$cc <- self
       on.exit(.currentCacheContext$cc <- oldCC)
 
       return(func())

R/conditions.R

@@ -0,0 +1,333 @@
+#' Stack trace manipulation functions
+#'
+#' Advanced (borderline internal) functions for capturing, printing, and
+#' manipulating stack traces.
+#'
+#' @return \code{printError} and \code{printStackTrace} return
+#'   \code{invisible()}. The other functions pass through the results of
+#'   \code{expr}.
+#'
+#' @examples
+#' # Keeps tryCatch and withVisible related calls off the
+#' # pretty-printed stack trace
+#'
+#' visibleFunction1 <- function() {
+#'   stop("Kaboom!")
+#' }
+#'
+#' visibleFunction2 <- function() {
+#'   visibleFunction1()
+#' }
+#'
+#' hiddenFunction <- function(expr) {
+#'   expr
+#' }
+#'
+#' # An example without ..stacktraceon/off.. manipulation.
+#' # The outer "try" is just to prevent example() from stopping.
+#' try({
+#'   # The withLogErrors call ensures that stack traces are captured
+#'   # and that errors that bubble up are logged using warning().
+#'   withLogErrors({
+#'     # tryCatch and withVisible are just here to add some noise to
+#'     # the stack trace.
+#'     tryCatch(
+#'       withVisible({
+#'         hiddenFunction(visibleFunction2())
+#'       })
+#'     )
+#'   })
+#' })
+#'
+#' # Now the same example, but with ..stacktraceon/off.. to hide some
+#' # of the less-interesting bits (tryCatch and withVisible).
+#' ..stacktraceoff..({
+#'   try({
+#'     withLogErrors({
+#'       tryCatch(
+#'         withVisible(
+#'           hiddenFunction(
+#'             ..stacktraceon..(visibleFunction2())
+#'           )
+#'         )
+#'       )
+#'     })
+#'   })
+#' })
+#'
+#'
+#' @name stacktrace
+#' @rdname stacktrace
+#' @keywords internal
+NULL
+
+getCallNames <- function(calls) {
+  sapply(calls, function(call) {
+    if (is.function(call[[1]])) {
+      "<Anonymous>"
+    } else if (inherits(call[[1]], "call")) {
+      paste0(format(call[[1]]), collapse = " ")
+    } else if (typeof(call[[1]]) == "promise") {
+      "<Promise>"
+    } else {
+      paste0(as.character(call[[1]]), collapse = " ")
+    }
+  })
+}
+
+getLocs <- function(calls) {
+  sapply(calls, function(call) {
+    srcref <- attr(call, "srcref", exact = TRUE)
+    if (!is.null(srcref)) {
+      srcfile <- attr(srcref, "srcfile", exact = TRUE)
+      if (!is.null(srcfile) && !is.null(srcfile$filename)) {
+        loc <- paste0(srcfile$filename, "#", srcref[[1]])
+        return(paste0(" [", loc, "]"))
+      }
+    }
+    return("")
+  })
+}
+
+#' @details \code{captureStackTraces} runs the given \code{expr} and if any
+#'   \emph{uncaught} errors occur, annotates them with stack trace info for use
+#'   by \code{printError} and \code{printStackTrace}. It is not necessary to use
+#'   \code{captureStackTraces} around the same expression as
+#'   \code{withLogErrors}, as the latter includes a call to the former. Note
+#'   that if \code{expr} contains calls (either directly or indirectly) to
+#'   \code{try}, or \code{tryCatch} with an error handler, stack traces therein
+#'   cannot be captured unless another \code{captureStackTraces} call is
+#'   inserted in the interior of the \code{try} or \code{tryCatch}. This is
+#'   because these calls catch the error and prevent it from traveling up to the
+#'   condition handler installed by \code{captureStackTraces}.
+#'
+#' @param expr The expression to wrap.
+#' @rdname stacktrace
+#' @export
+captureStackTraces <- function(expr) {
+  withCallingHandlers(expr,
+    error = function(e) {
+      if (is.null(attr(e, "stack.trace", exact = TRUE))) {
+        calls <- sys.calls()
+        attr(e, "stack.trace") <- calls
+        stop(e)
+      }
+    }
+  )
+}
+
+#' @details \code{withLogErrors} captures stack traces and logs errors that
+#'   occur in \code{expr}, but does allow errors to propagate beyond this point
+#'   (i.e. it doesn't catch the error). The same caveats that apply to
+#'   \code{captureStackTraces} with regard to \code{try}/\code{tryCatch} apply
+#'   to \code{withLogErrors}.
+#' @rdname stacktrace
+#' @export
+withLogErrors <- function(expr,
+  full = getOption("shiny.fullstacktrace", FALSE),
+  offset = getOption("shiny.stacktraceoffset", TRUE)) {
+
+  withCallingHandlers(
+    captureStackTraces(expr),
+    error = function(cond) {
+      # Don't print shiny.silent.error (i.e. validation errors)
+      if (inherits(cond, "shiny.silent.error"))
+        return()
+      printError(cond, full = full, offset = offset)
+    }
+  )
+}
+
+#' @details \code{printError} prints the error and stack trace (if any) using
+#'   \code{warning(immediate.=TRUE)}. \code{printStackTrace} prints the stack
+#'   trace only.
+#'
+#' @param cond An condition object (generally, an error).
+#' @param full If \code{TRUE}, then every element of \code{sys.calls()} will be
+#'   included in the stack trace. By default (\code{FALSE}), calls that Shiny
+#'   deems uninteresting will be hidden.
+#' @param offset If \code{TRUE} (the default), srcrefs will be reassigned from
+#'   the calls they originated from, to the destinations of those calls. If
+#'   you're used to stack traces from other languages, this feels more
+#'   intuitive, as the definition of the function indicated in the call and the
+#'   location specified by the srcref match up. If \code{FALSE}, srcrefs will be
+#'   left alone (traditional R treatment where the srcref is of the callsite).
+#' @rdname stacktrace
+#' @export
+printError <- function(cond,
+  full = getOption("shiny.fullstacktrace", FALSE),
+  offset = getOption("shiny.stacktraceoffset", TRUE)) {
+
+  warning(call. = FALSE, immediate. = TRUE, sprintf("Error in %s: %s",
+    getCallNames(list(conditionCall(cond))), conditionMessage(cond)))
+  printStackTrace(cond, full = full, offset = offset)
+  invisible()
+}
+
+#' @rdname stacktrace
+#' @export
+printStackTrace <- function(cond,
+  full = getOption("shiny.fullstacktrace", FALSE),
+  offset = getOption("shiny.stacktraceoffset", TRUE)) {
+
+  stackTrace <- attr(cond, "stack.trace", exact = TRUE)
+  tryCatch(
+    if (!is.null(stackTrace)) {
+      message(paste0(
+        "Stack trace (innermost first):\n",
+        paste0(collapse = "\n",
+          formatStackTrace(stackTrace, full = full, offset = offset,
+            indent = "    ")
+        )
+      ))
+    } else {
+      message("No stack trace available")
+    },
+
+    error = function(cond) {
+      warning("Failed to write stack trace: ", cond)
+    }
+  )
+  invisible()
+}
+
+#' @details \code{extractStackTrace} takes a list of calls (e.g. as returned
+#'   from \code{conditionStackTrace(cond)}) and returns a data frame with one
+#'   row for each stack frame and the columns \code{num} (stack frame number),
+#'   \code{call} (a function name or similar), and \code{loc} (source file path
+#'   and line number, if available).
+#' @rdname stacktrace
+#' @export
+extractStackTrace <- function(calls,
+  full = getOption("shiny.fullstacktrace", FALSE),
+  offset = getOption("shiny.stacktraceoffset", TRUE)) {
+
+  srcrefs <- getSrcRefs(calls)
+  if (offset) {
+    # Offset calls vs. srcrefs by 1 to make them more intuitive.
+    # E.g. for "foo [bar.R:10]", line 10 of bar.R will be part of
+    # the definition of foo().
+    srcrefs <- c(utils::tail(srcrefs, -1), list(NULL))
+  }
+  calls <- setSrcRefs(calls, srcrefs)
+
+  callnames <- getCallNames(calls)
+
+  # Hide and show parts of the callstack based on ..stacktrace(on|off)..
+  if (full) {
+    toShow <- rep.int(TRUE, length(calls))
+  } else {
+    # Remove stop(), .handleSimpleError(), and h() calls from the end of
+    # the calls--they don't add any helpful information. But only remove
+    # the last *contiguous* block of them, and then, only if they are the
+    # last thing in the calls list.
+    hideable <- callnames %in% c("stop", ".handleSimpleError", "h")
+    # What's the last that *didn't* match stop/.handleSimpleError/h?
+    lastGoodCall <- max(which(!hideable))
+    toRemove <- length(calls) - lastGoodCall
+    # But don't remove more than 5 levels--that's an indication we might
+    # have gotten it wrong, I guess
+    if (toRemove > 0 && toRemove < 5) {
+      calls <- utils::head(calls, -toRemove)
+      callnames <- utils::head(callnames, -toRemove)
+    }
+
+    # This uses a ref-counting scheme. It might make sense to switch this
+    # to a toggling scheme, so the most recent ..stacktrace(on|off)..
+    # directive wins, regardless of what came before it.
+    # Also explicitly remove ..stacktraceon.. because it can appear with
+    # score > 0 but still should never be shown.
+    score <- rep.int(0, length(callnames))
+    score[callnames == "..stacktraceoff.."] <- -1
+    score[callnames == "..stacktraceon.."] <- 1
+    toShow <- (1 + cumsum(score)) > 0 & !(callnames %in% c("..stacktraceon..", "..stacktraceoff.."))
+  }
+  calls <- calls[toShow]
+
+  calls <- rev(calls) # Show in traceback() order
+  index <- rev(which(toShow))
+  width <- floor(log10(max(index))) + 1
+
+  data.frame(
+    num = index,
+    call = getCallNames(calls),
+    loc = getLocs(calls),
+    stringsAsFactors = FALSE
+  )
+}
+
+#' @details \code{formatStackTrace} is similar to \code{extractStackTrace}, but
+#'   it returns a preformatted character vector instead of a data frame.
+#' @param indent A string to prefix every line of the stack trace.
+#' @rdname stacktrace
+#' @export
+formatStackTrace <- function(calls, indent = "    ",
+  full = getOption("shiny.fullstacktrace", FALSE),
+  offset = getOption("shiny.stacktraceoffset", TRUE)) {
+
+  st <- extractStackTrace(calls, full = full, offset = offset)
+  if (nrow(st) == 0) {
+    return(character(0))
+  }
+
+  width <- floor(log10(max(st$num))) + 1
+  paste0(
+    indent,
+    formatC(st$num, width = width),
+    ": ",
+    st$call,
+    st$loc
+  )
+}
+
+getSrcRefs <- function(calls) {
+  lapply(calls, function(call) {
+    attr(call, "srcref", exact = TRUE)
+  })
+}
+
+setSrcRefs <- function(calls, srcrefs) {
+  mapply(function(call, srcref) {
+    structure(call, srcref = srcref)
+  }, calls, srcrefs)
+}
+
+stripStackTrace <- function(cond) {
+  conditionStackTrace(cond) <- NULL
+}
+
+#' @details \code{conditionStackTrace} and \code{conditionStackTrace<-} are
+#'   accessor functions for getting/setting stack traces on conditions.
+#'
+#' @param cond A condition that may have previously been annotated by
+#'   \code{captureStackTraces} (or \code{withLogErrors}).
+#' @rdname stacktrace
+#' @export
+conditionStackTrace <- function(cond) {
+  attr(cond, "stack.trace", exact = TRUE)
+}
+
+#' @param value The stack trace value to assign to the condition.
+#' @rdname stacktrace
+#' @export
+`conditionStackTrace<-` <- function(cond, value) {
+  attr(cond, "stack.trace") <- value
+  invisible(cond)
+}
+
+#' @details The two functions \code{..stacktraceon..} and
+#'   \code{..stacktraceoff..} have no runtime behavior during normal execution;
+#'   they exist only to create artifacts on the stack trace (sys.call()) that
+#'   instruct the stack trace pretty printer what parts of the stack trace are
+#'   interesting or not. The initial state is 1 and we walk from the outermost
+#'   call inwards. Each ..stacktraceoff.. decrements the state by one, and each
+#'   ..stacktraceon.. increments the state by one. Any stack trace frame whose
+#'   value is less than 1 is hidden, and finally, the ..stacktraceon.. and
+#'   ..stacktraceoff.. calls themselves are hidden too.
+#'
+#' @rdname stacktrace
+#' @export
+..stacktraceon.. <- function(expr) expr
+#' @rdname stacktrace
+#' @export
+..stacktraceoff.. <- function(expr) expr

R/diagnose.R

@@ -0,0 +1,157 @@
+# Analyze an R file for possible extra or missing commas. Returns FALSE if any
+# problems detected, TRUE otherwise.
+diagnoseCode <- function(path = NULL, text = NULL) {
+  if (!xor(is.null(path), is.null(text))) {
+    stop("Must specify `path` or `text`, but not both.")
+  }
+
+  if (!is.null(path)) {
+    tokens <- sourcetools::tokenize_file(path)
+  } else {
+    tokens <- sourcetools::tokenize_string(text)
+  }
+
+  find_scopes <- function(tokens) {
+    # Strip whitespace and comments
+    tokens <- tokens[!(tokens$type %in% c("whitespace", "comment")),]
+
+    # Replace various types of things with "value"
+    tokens$type[tokens$type %in% c("string", "number", "symbol", "keyword")] <- "value"
+
+    # Record types for close and open brace/bracket/parens, and commas
+    brace_idx <- tokens$value %in% c("(", ")", "{", "}", "[", "]", ",")
+    tokens$type[brace_idx] <- tokens$value[brace_idx]
+
+    # Stack-related function for recording scope. Starting scope is "{"
+    stack <- "{"
+    push <- function(x) {
+      stack <<- c(stack, x)
+    }
+    pop <- function() {
+      if (length(stack) == 1) {
+        # Stack underflow, but we need to keep going
+        return(NA_character_)
+      }
+      res <- stack[length(stack)]
+      stack <<- stack[-length(stack)]
+      res
+    }
+    peek <- function() {
+      stack[length(stack)]
+    }
+
+    # First, establish a scope for each token. For opening and closing
+    # braces/brackets/parens, the scope at that location is the *surrounding*
+    # scope, not the new scope created by the brace/bracket/paren.
+    for (i in seq_len(nrow(tokens))) {
+      value <- tokens$value[i]
+
+      tokens$scope[i] <- peek()
+      if (value %in% c("{", "(", "[")) {
+        push(value)
+
+      } else if (value == "}") {
+        if (!identical(pop(), "{"))
+          tokens$err[i] <- "unmatched_brace"
+        # For closing brace/paren/bracket, get the scope after popping
+        tokens$scope[i] <- peek()
+
+      } else if (value == ")") {
+        if (!identical(pop(), "("))
+          tokens$err[i] <- "unmatched_paren"
+        tokens$scope[i] <- peek()
+
+      } else if (value == "]") {
+        if (!identical(pop(), "["))
+          tokens$err[i] <- "unmatched_bracket"
+        tokens$scope[i] <- peek()
+      }
+    }
+
+    tokens
+  }
+
+  check_commas <- function(tokens) {
+    # Find extra and missing commas
+    tokens$err <- mapply(
+      tokens$type,
+      c("", tokens$type[-length(tokens$type)]),
+      c(tokens$type[-1],  ""),
+      tokens$scope,
+      tokens$err,
+      SIMPLIFY = FALSE,
+      FUN = function(type, prevType, nextType, scope, err) {
+        # If an error was already found, just return it. This could have
+        # happened in the brace/paren/bracket matching phase.
+        if (!is.na(err)) {
+          return(err)
+        }
+        if (scope == "(") {
+          if (type == "," &&
+              (prevType == "(" || prevType == "," || nextType == ")"))
+          {
+            return("extra_comma")
+          }
+
+          if ((prevType == ")" && type == "value") ||
+              (prevType == "value" && type == "value")) {
+            return("missing_comma")
+          }
+        }
+
+        NA_character_
+      }
+    )
+
+    tokens
+  }
+
+
+  tokens$err <- NA_character_
+  tokens <- find_scopes(tokens)
+  tokens <- check_commas(tokens)
+
+  # No errors found
+  if (all(is.na(tokens$err))) {
+    return(TRUE)
+  }
+
+  # If we got here, errors were found; print messages.
+  if (!is.null(path)) {
+    lines <- readLines(path)
+  } else {
+    lines <- strsplit(text, "\n")[[1]]
+  }
+
+  # Print out the line of code with the error, and point to the column with
+  # the error.
+  show_code_error <- function(msg, lines, row, col) {
+    message(paste0(
+      msg, "\n",
+      row, ":", lines[row], "\n",
+      paste0(rep.int(" ", nchar(as.character(row)) + 1), collapse = ""),
+      gsub(perl = TRUE, "[^\\s]", " ", substr(lines[row], 1, col-1)), "^"
+    ))
+  }
+
+  err_idx <- which(!is.na(tokens$err))
+  msg <- ""
+  for (i in err_idx) {
+    row <- tokens$row[i]
+    col <- tokens$column[i]
+    err <- tokens$err[i]
+
+    if (err == "missing_comma") {
+      show_code_error("Possible missing comma at:", lines, row, col)
+    } else if (err == "extra_comma") {
+      show_code_error("Possible extra comma at:", lines, row, col)
+    } else if (err == "unmatched_brace") {
+      show_code_error("Possible unmatched '}' at:", lines, row, col)
+    } else if (err == "unmatched_paren") {
+      show_code_error("Possible unmatched ')' at:", lines, row, col)
+    } else if (err == "unmatched_bracket") {
+      show_code_error("Possible unmatched ']' at:", lines, row, col)
+    }
+  }
+  return(FALSE)
+}

R/fileupload.R

@@ -20,18 +20,19 @@
 # form upload, i.e. traditional HTTP POST-based file upload) doesn't work with
 # the websockets package's HTTP server at the moment.
 
-FileUploadOperation <- setRefClass(
+FileUploadOperation <- R6Class(
   'FileUploadOperation',
-  fields = list(
-    .parent = 'ANY',
-    .id = 'character',
-    .files = 'data.frame',
-    .dir = 'character',
-    .currentFileInfo = 'list',
-    .currentFileData = 'ANY',
-    .pendingFileInfos = 'list'
-  ),
-  methods = list(
+  portable = FALSE,
+  class = FALSE,
+  public = list(
+    .parent = NULL,
+    .id = character(0),
+    .files = data.frame(),
+    .dir = character(0),
+    .currentFileInfo = list(),
+    .currentFileData = NULL,
+    .pendingFileInfos = list(),
+
     initialize = function(parent, id, dir, fileInfos) {
       .parent <<- parent
       .id <<- id
@@ -78,33 +79,49 @@ FileUploadOperation <- setRefClass(
 )
 
 #' @include map.R
-FileUploadContext <- setRefClass(
+FileUploadContext <- R6Class(
   'FileUploadContext',
-  fields = list(
-    .basedir = 'character',
-    .operations = 'Map'
+  class = FALSE,
+  private = list(
+    basedir = character(0),
+    operations = 'Map',
+    ids = character(0)  # Keep track of all ids used for file uploads
   ),
-  methods = list(
+  public = list(
     initialize = function(dir=tempdir()) {
-      .basedir <<- dir
+      private$basedir <- dir
+      private$operations <- Map$new()
     },
     createUploadOperation = function(fileInfos) {
       while (TRUE) {
         id <- paste(as.raw(p_runif(12, min=0, max=0xFF)), collapse='')
-        dir <- file.path(.basedir, id)
+        private$ids <- c(private$ids, id)
+        dir <- file.path(private$basedir, id)
         if (!dir.create(dir))
           next
 
-        op <- FileUploadOperation$new(.self, id, dir, fileInfos)
-        .operations$set(id, op)
+        op <- FileUploadOperation$new(self, id, dir, fileInfos)
+        private$operations$set(id, op)
         return(id)
       }
     },
     getUploadOperation = function(jobId) {
-      .operations$get(jobId)
+      private$operations$get(jobId)
     },
     onJobFinished = function(jobId) {
-      .operations$remove(jobId)
+      private$operations$remove(jobId)
+    },
+    # Remove the directories containing file uploads; this is to be called when
+    # a session ends.
+    rmUploadDirs = function() {
+      # Make sure all_paths is underneath the tempdir()
+      if (!grepl(normalizePath(tempdir()), normalizePath(private$basedir), fixed = TRUE)) {
+        stop("Won't remove upload path ", private$basedir,
+          "because it is not under tempdir(): ", tempdir())
+      }
+
+      all_paths <- file.path(private$basedir, private$ids)
+      unlink(all_paths, recursive = TRUE)
     }
   )
 )

R/globals.R

@@ -5,5 +5,19 @@
   # R's lazy-loading package scheme causes the private seed to be cached in the
   # package itself, making our PRNG completely deterministic. This line resets
   # the private seed during load.
-  withPrivateSeed(set.seed(NULL))
+  withPrivateSeed(reinitializeSeed())
+}
+
+.onAttach <- function(libname, pkgname) {
+  # Check for htmlwidgets version, if installed. As of Shiny 0.12.0 and
+  # htmlwidgets 0.4, both packages switched from RJSONIO to jsonlite. Because of
+  # this change, Shiny 0.12.0 will work only with htmlwidgets >= 0.4, and vice
+  # versa.
+  if (system.file(package = "htmlwidgets") != "" &&
+      utils::packageVersion("htmlwidgets") < "0.4") {
+    packageStartupMessage(
+      "This version of Shiny is designed to work with htmlwidgets >= 0.4. ",
+      "Please upgrade your version of htmlwidgets."
+    )
+  }
 }

R/graph.R

@@ -1,5 +1,11 @@
-writeReactLog <- function(file=stdout()) {
-  cat(RJSONIO::toJSON(.graphEnv$log, pretty=TRUE), file=file)
+writeReactLog <- function(file=stdout(), sessionToken = NULL) {
+  log <- .graphStack$as_list()
+  if (!is.null(sessionToken)) {
+    log <- Filter(function(x) {
+      is.null(x$session) || identical(x$session, sessionToken)
+    }, log)
+  }
+  cat(toJSON(log, pretty=TRUE), file=file)
 }
 
 #' Reactive Log Visualizer
@@ -37,15 +43,15 @@ writeReactLog <- function(file=stdout()) {
 #'
 #' @export
 showReactLog <- function() {
-  browseURL(renderReactLog())
+  utils::browseURL(renderReactLog())
 }
 
-renderReactLog <- function() {
+renderReactLog <- function(sessionToken = NULL) {
   templateFile <- system.file('www/reactive-graph.html', package='shiny')
   html <- paste(readLines(templateFile, warn=FALSE), collapse='\r\n')
   tc <- textConnection(NULL, 'w')
   on.exit(close(tc))
-  writeReactLog(tc)
+  writeReactLog(tc, sessionToken)
   cat('\n', file=tc)
   flush(tc)
   html <- sub('__DATA__', paste(textConnectionValue(tc), collapse='\r\n'), html, fixed=TRUE)
@@ -55,8 +61,13 @@ renderReactLog <- function() {
 }
 
 .graphAppend <- function(logEntry, domain = getDefaultReactiveDomain()) {
-  if (isTRUE(getOption('shiny.reactlog', FALSE)))
-    .graphEnv$log <- c(.graphEnv$log, list(logEntry))
+  if (isTRUE(getOption('shiny.reactlog'))) {
+    sessionToken <- if (is.null(domain)) NULL else domain$token
+    .graphStack$push(c(logEntry, list(
+      session = sessionToken,
+      time = as.numeric(Sys.time())
+    )))
+  }
 
   if (!is.null(domain)) {
     domain$reactlog(logEntry)
@@ -74,7 +85,7 @@ renderReactLog <- function() {
 .graphCreateContext <- function(id, label, type, prevId, domain) {
   .graphAppend(list(
     action='ctx', id=id, label=paste(label, collapse='\n'),
-    srcref=attr(label, "srcref"), srcfile=attr(label, "srcfile"),
+    srcref=as.vector(attr(label, "srcref")), srcfile=attr(label, "srcfile"),
     type=type, prevId=prevId
   ), domain = domain)
 }
@@ -91,7 +102,7 @@ renderReactLog <- function() {
   .graphAppend(list(
     action = 'valueChange',
     id = label,
-    value = paste(capture.output(str(value)), collapse='\n')
+    value = paste(utils::capture.output(utils::str(value)), collapse='\n')
   ))
 }
 
@@ -99,5 +110,5 @@ renderReactLog <- function() {
   .graphAppend(list(action='invalidate', id=id), domain)
 }
 
-.graphEnv <- new.env()
-.graphEnv$log <- list()
+#' @include stack.R
+.graphStack <- Stack$new()

R/html-deps.R

@@ -1,5 +1,17 @@
-pathPattern <- "^(~|/|[a-zA-Z]:[/\\\\]|\\\\\\\\)"
-
+#' Create a web dependency
+#'
+#' Ensure that a file-based HTML dependency (from the htmltools package) can be
+#' served over Shiny's HTTP server. This function works by using
+#' \code{\link{addResourcePath}} to map the HTML dependency's directory to a
+#' URL.
+#'
+#' @param dependency A single HTML dependency object, created using
+#'   \code{\link{htmlDependency}}. If the \code{src} value is named, then
+#'   \code{href} and/or \code{file} names must be present.
+#'
+#' @return A single HTML dependency object that has an \code{href}-named element
+#'   in its \code{src}.
+#' @export
 createWebDependency <- function(dependency) {
   if (is.null(dependency))
     return(NULL)
@@ -7,53 +19,29 @@ createWebDependency <- function(dependency) {
   if (!inherits(dependency, "html_dependency"))
     stop("Unexpected non-html_dependency type")
 
-  # Does it look like a path on disk? Register it as a resource and replace the
-  # disk-based path with a relative URL
-  if (grepl(pathPattern, dependency$path, perl = TRUE)) {
+  if (is.null(dependency$src$href)) {
     prefix <- paste(dependency$name, "-", dependency$version, sep = "")
-    addResourcePath(prefix, dependency$path)
-    dependency$path <- prefix
+    addResourcePath(prefix, dependency$src$file)
+    dependency$src$href <- prefix
   }
 
   return(dependency)
 }
 
-# Given a list of dependencies, choose the latest versions and return them as a
-# named list in the correct order.
-getNewestDeps <- function(dependencies) {
-  result <- list()
-  for (dep in dependencies) {
-    if (!is.null(dep)) {
-      other <- result[[dep$name]]
-      if (is.null(other) || compareVersion(dep$version, other$version) > 0) {
-        # Note that if the dep was already in the result list, then this
-        # assignment preserves its position in the list
-        result[[dep$name]] <- dep
-      }
-    }
-  }
-  return(result)
-}
 
-# Remove `remove` from `dependencies` if the name matches.
-# dependencies is a named list of dependencies.
-# remove is a named list of dependencies that take priority.
-# If warnOnConflict, then warn when a dependency is being removed because of an
-# older version already being loaded.
-removeDeps <- function(dependencies, remove, warnOnConflict = TRUE) {
-  matches <- names(dependencies) %in% names(remove)
-  if (warnOnConflict) {
-    for (depname in names(dependencies)[matches]) {
-      loser <- dependencies[[depname]]
-      winner <- remove[[depname]]
-      if (compareVersion(loser$version, winner$version) > 0) {
-        warning(sprintf(paste("The dependency %s %s conflicts with",
-          "version %s"), loser$name, loser$version, winner$version
-        ))
-      }
-    }
-  }
+# Given a Shiny tag object, process singletons and dependencies. Returns a list
+# with rendered HTML and dependency objects.
+processDeps <- function(tags, session) {
+  ui <- takeSingletons(tags, session$singletons, desingleton=FALSE)$ui
+  ui <- surroundSingletons(ui)
+  dependencies <- lapply(
+    resolveDependencies(findDependencies(ui)),
+    createWebDependency
+  )
+  names(dependencies) <- NULL
 
-  # Return only deps that weren't in remove
-  return(dependencies[!matches])
+  list(
+    html = doRenderTags(ui),
+    deps = dependencies
+  )
 }

R/htmltools.R

@@ -1,97 +1,8 @@
-
-
-# Define an HTML dependency
-#
-# Define an HTML dependency (e.g. CSS or Javascript and related library). HTML
-# dependency definitions are required for \code{\link{html_output}} that
-# require CSS or JavaScript within the document head to render correctly.
-#
-# @param name Library name
-# @param version Library version
-# @param path Full path to library
-# @param meta Named list of meta tags to insert into document head
-# @param script Script(s) to include within the document head (should be
-#   specified relative to the \code{path} parameter).
-# @param stylesheet Stylesheet(s) to include within the document (should be
-#   specified relative to the \code{path} parameter).
-# @param head Arbitrary lines of HTML to insert into the document head
-#
-# @return An object that can be included in the list of dependencies passed to
-#   \code{\link{html_print}} or \code{\link{html_knit_print}}.
-#
-# @details See the documentation on
-#   \href{http://rmarkdown.rstudio.com/developer_html_widgets.html}{R
-#   Markdown HTML Widgets} for examples and additional details.
-#
-html_dependency <- function(name,
-  version,
-  path,
-  meta = NULL,
-  script = NULL,
-  stylesheet = NULL,
-  head = NULL) {
-  structure(class = "html_dependency", list(
-    name = name,
-    version = version,
-    path = path,
-    meta = meta,
-    script = script,
-    stylesheet = stylesheet,
-    head = head
-  ))
-}
-
-
-# Given a list of HTML dependencies produce a character representation
-# suitable for inclusion within the head of an HTML document
-html_dependencies_as_character <- function(dependencies, lib_dir = NULL) {
-
-  html <- c()
-
-  for (dep in dependencies) {
-
-    # copy library files if necessary
-    if (!is.null(lib_dir)) {
-
-      if (!file.exists(lib_dir))
-        dir.create(lib_dir)
-
-      target_dir <- file.path(lib_dir, basename(dep$path))
-      if (!file.exists(target_dir))
-        file.copy(from = dep$path, to = lib_dir, recursive = TRUE)
-
-      dep$path <- file.path(basename(lib_dir), basename(target_dir))
-    }
-
-    # add meta content
-    for (name in names(dep$meta)) {
-      html <- c(html, paste("<meta name=\"", name,
-        "\" content=\"", dep$meta[[name]], "\" />",
-        sep = ""))
-    }
-
-    # add stylesheets
-    for (stylesheet in dep$stylesheet) {
-      stylesheet <- file.path(dep$path, stylesheet)
-      html <- c(html, paste("<link href=\"", stylesheet, "\" ",
-        "rel=\"stylesheet\" />",
-        sep = ""))
-    }
-
-    # add scripts
-    for (script in dep$script) {
-      script <- file.path(dep$path, script)
-      html <- c(html,
-        paste("<script src=\"", script, "\"></script>", sep = ""))
-    }
-
-    # add raw head content
-    html <- c(html, dep$head)
-  }
-
-  html
-}
-
-attach_dependency <- function(x, dependency) {
-  structure(x, html_dependency = dependency)
-}
+#' @export a br code div em h1 h2 h3 h4 h5 h6 hr HTML img p pre span strong
+#' @export includeCSS includeHTML includeMarkdown includeScript includeText
+#' @export is.singleton singleton
+#' @export tag tagAppendAttributes tagAppendChild tagAppendChildren tagList tags tagSetChildren withTags
+#' @export validateCssUnit
+#' @export knit_print.html knit_print.shiny.tag knit_print.shiny.tag.list
+#' @export htmlTemplate suppressDependencies
+NULL

R/image-interact-opts.R

@@ -0,0 +1,139 @@
+#' Create an object representing click options
+#'
+#' This generates an object representing click options, to be passed as the
+#' \code{click} argument of \code{\link{imageOutput}} or
+#' \code{\link{plotOutput}}.
+#'
+#' @param id Input value name. For example, if the value is \code{"plot_click"},
+#'   then the click coordinates will be available as \code{input$plot_click}.
+#' @param clip Should the click area be clipped to the plotting area? If FALSE,
+#'   then the server will receive click events even when the mouse is outside
+#'   the plotting area, as long as it is still inside the image.
+#' @export
+clickOpts <- function(id = NULL, clip = TRUE) {
+  if (is.null(id))
+    stop("id must not be NULL")
+
+  list(
+    id = id,
+    clip = clip
+  )
+}
+
+
+#' Create an object representing double-click options
+#'
+#' This generates an object representing dobule-click options, to be passed as
+#' the \code{dblclick} argument of \code{\link{imageOutput}} or
+#' \code{\link{plotOutput}}.
+#'
+#' @param id Input value name. For example, if the value is
+#'   \code{"plot_dblclick"}, then the click coordinates will be available as
+#'   \code{input$plot_dblclick}.
+#' @param clip Should the click area be clipped to the plotting area? If FALSE,
+#'   then the server will receive double-click events even when the mouse is
+#'   outside the plotting area, as long as it is still inside the image.
+#' @param delay Maximum delay (in ms) between a pair clicks for them to be
+#'   counted as a double-click.
+#' @export
+dblclickOpts <- function(id = NULL, clip = TRUE, delay = 400) {
+  if (is.null(id))
+    stop("id must not be NULL")
+
+  list(
+    id = id,
+    clip = clip,
+    delay = delay
+  )
+}
+
+#' Create an object representing hover options
+#'
+#' This generates an object representing hovering options, to be passed as the
+#' \code{hover} argument of \code{\link{imageOutput}} or
+#' \code{\link{plotOutput}}.
+#'
+#' @param id Input value name. For example, if the value is \code{"plot_hover"},
+#'   then the hover coordinates will be available as \code{input$plot_hover}.
+#' @param delay How long to delay (in milliseconds) when debouncing or
+#'   throttling, before sending the mouse location to the server.
+#' @param delayType The type of algorithm for limiting the number of hover
+#'   events. Use \code{"throttle"} to limit the number of hover events to one
+#'   every \code{delay} milliseconds. Use \code{"debounce"} to suspend events
+#'   while the cursor is moving, and wait until the cursor has been at rest for
+#'   \code{delay} milliseconds before sending an event.
+#' @param clip Should the hover area be clipped to the plotting area? If FALSE,
+#'   then the server will receive hover events even when the mouse is outside
+#'   the plotting area, as long as it is still inside the image.
+#' @param nullOutside If \code{TRUE} (the default), the value will be set to
+#'   \code{NULL} when the mouse exits the plotting area. If \code{FALSE}, the
+#'   value will stop changing when the cursor exits the plotting area.
+#' @export
+hoverOpts <- function(id = NULL, delay = 300,
+                      delayType = c("debounce", "throttle"), clip = TRUE,
+                      nullOutside = TRUE) {
+  if (is.null(id))
+    stop("id must not be NULL")
+
+  list(
+    id = id,
+    delay = delay,
+    delayType = match.arg(delayType),
+    clip = clip,
+    nullOutside = nullOutside
+  )
+}
+
+#' Create an object representing brushing options
+#'
+#' This generates an object representing brushing options, to be passed as the
+#' \code{brush} argument of \code{\link{imageOutput}} or
+#' \code{\link{plotOutput}}.
+#'
+#' @param id Input value name. For example, if the value is \code{"plot_brush"},
+#'   then the coordinates will be available as \code{input$plot_brush}. Multiple
+#'   \code{imageOutput}/\code{plotOutput} calls may share the same \code{id}
+#'   value; brushing one image or plot will cause any other brushes with the
+#'   same \code{id} to disappear.
+#' @param fill Fill color of the brush.
+#' @param stroke Outline color of the brush.
+#' @param opacity Opacity of the brush
+#' @param delay How long to delay (in milliseconds) when debouncing or
+#'   throttling, before sending the brush data to the server.
+#' @param delayType The type of algorithm for limiting the number of brush
+#'   events. Use \code{"throttle"} to limit the number of brush events to one
+#'   every \code{delay} milliseconds. Use \code{"debounce"} to suspend events
+#'   while the cursor is moving, and wait until the cursor has been at rest for
+#'   \code{delay} milliseconds before sending an event.
+#' @param clip Should the brush area be clipped to the plotting area? If FALSE,
+#'   then the user will be able to brush outside the plotting area, as long as
+#'   it is still inside the image.
+#' @param direction The direction for brushing. If \code{"xy"}, the brush can be
+#'   drawn and moved in both x and y directions. If \code{"x"}, or \code{"y"},
+#'   the brush wil work horizontally or vertically.
+#' @param resetOnNew When a new image is sent to the browser (via
+#'   \code{\link{renderImage}}), should the brush be reset? The default,
+#'   \code{FALSE}, is useful if you want to update the plot while keeping the
+#'   brush. Using \code{TRUE} is useful if you want to clear the brush whenever
+#'   the plot is updated.
+#' @export
+brushOpts <- function(id = NULL, fill = "#9cf", stroke = "#036",
+                      opacity = 0.25, delay = 300,
+                      delayType = c("debounce", "throttle"), clip = TRUE,
+                      direction = c("xy", "x", "y"),
+                      resetOnNew = FALSE) {
+  if (is.null(id))
+    stop("id must not be NULL")
+
+  list(
+    id = id,
+    fill = fill,
+    stroke = stroke,
+    opacity = opacity,
+    delay = delay,
+    delayType = match.arg(delayType),
+    clip = clip,
+    direction = match.arg(direction),
+    resetOnNew = resetOnNew
+  )
+}

R/image-interact.R

@@ -0,0 +1,437 @@
+#' Find rows of data that are selected by a brush
+#'
+#' This function returns rows from a data frame which are under a brush used
+#' with \code{\link{plotOutput}}.
+#'
+#' It is also possible for this function to return all rows from the input data
+#' frame, but with an additional column \code{selected_}, which indicates which
+#' rows of the input data frame are selected by the brush (\code{TRUE} for
+#' selected, \code{FALSE} for not-selected). This is enabled by setting
+#' \code{allRows=TRUE} option.
+#'
+#' The \code{xvar}, \code{yvar}, \code{panelvar1}, and \code{panelvar2}
+#' arguments specify which columns in the data correspond to the x variable, y
+#' variable, and panel variables of the plot. For example, if your plot is
+#' \code{plot(x=cars$speed, y=cars$dist)}, and your brush is named
+#' \code{"cars_brush"}, then you would use \code{brushedPoints(cars,
+#' input$cars_brush, "speed", "dist")}.
+#'
+#' For plots created with ggplot2, it should not be necessary to specify the
+#' column names; that information will already be contained in the brush,
+#' provided that variables are in the original data, and not computed. For
+#' example, with \code{ggplot(cars, aes(x=speed, y=dist)) + geom_point()}, you
+#' could use \code{brushedPoints(cars, input$cars_brush)}. If, however, you use
+#' a computed column, like \code{ggplot(cars, aes(x=speed/2, y=dist)) +
+#' geom_point()}, then it will not be able to automatically extract column names
+#' and filter on them. If you want to use this function to filter data, it is
+#' recommended that you not use computed columns; instead, modify the data
+#' first, and then make the plot with "raw" columns in the modified data.
+#'
+#' If a specified x or y column is a factor, then it will be coerced to an
+#' integer vector. If it is a character vector, then it will be coerced to a
+#' factor and then integer vector. This means that the brush will be considered
+#' to cover a given character/factor value when it covers the center value.
+#'
+#' If the brush is operating in just the x or y directions (e.g., with
+#' \code{brushOpts(direction = "x")}, then this function will filter out points
+#' using just the x or y variable, whichever is appropriate.
+#'
+#' @param brush The data from a brush, such as \code{input$plot_brush}.
+#' @param df A data frame from which to select rows.
+#' @param xvar,yvar A string with the name of the variable on the x or y axis.
+#'   This must also be the name of a column in \code{df}. If absent, then this
+#'   function will try to infer the variable from the brush (only works for
+#'   ggplot2).
+#' @param panelvar1,panelvar2 Each of these is a string with the name of a panel
+#'   variable. For example, if with ggplot2, you facet on a variable called
+#'   \code{cyl}, then you can use \code{"cyl"} here. However, specifying the
+#'   panel variable should not be necessary with ggplot2; Shiny should be able
+#'   to auto-detect the panel variable.
+#' @param allRows If \code{FALSE} (the default) return a data frame containing
+#'   the selected rows. If \code{TRUE}, the input data frame will have a new
+#'   column, \code{selected_}, which indicates whether the row was inside the
+#'   brush (\code{TRUE}) or outside the brush (\code{FALSE}).
+#'
+#' @seealso \code{\link{plotOutput}} for example usage.
+#' @export
+brushedPoints <- function(df, brush, xvar = NULL, yvar = NULL,
+                          panelvar1 = NULL, panelvar2 = NULL,
+                          allRows = FALSE) {
+  if (is.null(brush)) {
+    if (allRows)
+      df$selected_ <- FALSE
+    else
+      df <- df[0, , drop = FALSE]
+
+    return(df)
+  }
+
+  if (is.null(brush$xmin)) {
+    stop("brushedPoints requires a brush object with xmin, xmax, ymin, and ymax.")
+  }
+
+  # Which direction(s) the brush is selecting over. Direction can be 'x', 'y',
+  # or 'xy'.
+  use_x <- grepl("x", brush$direction)
+  use_y <- grepl("y", brush$direction)
+
+  # Try to extract vars from brush object
+  xvar      <- xvar      %OR% brush$mapping$x
+  yvar      <- yvar      %OR% brush$mapping$y
+  panelvar1 <- panelvar1 %OR% brush$mapping$panelvar1
+  panelvar2 <- panelvar2 %OR% brush$mapping$panelvar2
+
+  # Filter out x and y values
+  keep_rows <- rep(TRUE, nrow(df))
+  if (use_x) {
+    if (is.null(xvar))
+      stop("brushedPoints: not able to automatically infer `xvar` from brush")
+    # Extract data values from the data frame
+    x <- asNumber(df[[xvar]])
+    keep_rows <- keep_rows & (x >= brush$xmin & x <= brush$xmax)
+  }
+  if (use_y) {
+    if (is.null(yvar))
+      stop("brushedPoints: not able to automatically infer `yvar` from brush")
+    y <- asNumber(df[[yvar]])
+    keep_rows <- keep_rows & (y >= brush$ymin & y <= brush$ymax)
+  }
+
+  # Find which rows are matches for the panel vars (if present)
+  if (!is.null(panelvar1))
+    keep_rows <- keep_rows & panelMatch(brush$panelvar1, df[[panelvar1]])
+  if (!is.null(panelvar2))
+    keep_rows <- keep_rows & panelMatch(brush$panelvar2, df[[panelvar2]])
+
+  if (allRows) {
+    df$selected_ <- keep_rows
+    df
+  } else {
+    df[keep_rows, , drop = FALSE]
+  }
+}
+
+# The `brush` data structure will look something like the examples below.
+# For base graphics, `mapping` is empty, and there are no panelvars:
+# List of 8
+#  $ xmin   : num 3.73
+#  $ xmax   : num 4.22
+#  $ ymin   : num 13.9
+#  $ ymax   : num 19.8
+#  $ mapping: Named list()
+#  $ domain :List of 4
+#   ..$ left  : num 1.36
+#   ..$ right : num 5.58
+#   ..$ bottom: num 9.46
+#   ..$ top   : num 34.8
+#  $ range  :List of 4
+#   ..$ left  : num 58
+#   ..$ right : num 429
+#   ..$ bottom: num 226
+#   ..$ top   : num 58
+#  $ log    :List of 2
+#   ..$ x: NULL
+#   ..$ y: NULL
+#  $ direction: chr "y"
+#
+# For ggplot2, the mapping vars usually will be included, and if faceting is
+# used, they will be listed as panelvars:
+# List of 10
+#  $ xmin     : num 3.18
+#  $ xmax     : num 3.78
+#  $ ymin     : num 17.1
+#  $ ymax     : num 20.4
+#  $ panelvar1: int 6
+#  $ panelvar2: int 0
+#  $ mapping  :List of 4
+#   ..$ x        : chr "wt"
+#   ..$ y        : chr "mpg"
+#   ..$ panelvar1: chr "cyl"
+#   ..$ panelvar2: chr "am"
+#  $ domain   :List of 4
+#   ..$ left  : num 1.32
+#   ..$ right : num 5.62
+#   ..$ bottom: num 9.22
+#   ..$ top   : num 35.1
+#  $ range    :List of 4
+#   ..$ left  : num 172
+#   ..$ right : num 300
+#   ..$ bottom: num 144
+#   ..$ top   : num 28.5
+#  $ log      :List of 2
+#   ..$ x: NULL
+#   ..$ y: NULL
+#  $ direction: chr "y"
+
+
+#'Find rows of data that are near a click/hover/double-click
+#'
+#'This function returns rows from a data frame which are near a click, hover, or
+#'double-click, when used with \code{\link{plotOutput}}. The rows will be sorted
+#'by their distance to the mouse event.
+#'
+#'It is also possible for this function to return all rows from the input data
+#'frame, but with an additional column \code{selected_}, which indicates which
+#'rows of the input data frame are selected by the brush (\code{TRUE} for
+#'selected, \code{FALSE} for not-selected). This is enabled by setting
+#'\code{allRows=TRUE} option. If this is used, the resulting data frame will not
+#'be sorted by distance to the mouse event.
+#'
+#'The \code{xvar}, \code{yvar}, \code{panelvar1}, and \code{panelvar2} arguments
+#'specify which columns in the data correspond to the x variable, y variable,
+#'and panel variables of the plot. For example, if your plot is
+#'\code{plot(x=cars$speed, y=cars$dist)}, and your click variable is named
+#'\code{"cars_click"}, then you would use \code{nearPoints(cars,
+#'input$cars_brush, "speed", "dist")}.
+#'
+#'@inheritParams brushedPoints
+#'@param coordinfo The data from a mouse event, such as \code{input$plot_click}.
+#'@param threshold A maxmimum distance to the click point; rows in the data
+#'  frame where the distance to the click is less than \code{threshold} will be
+#'  returned.
+#'@param maxpoints Maximum number of rows to return. If NULL (the default),
+#'  return all rows that are within the threshold distance.
+#'@param addDist If TRUE, add a column named \code{dist_} that contains the
+#'  distance from the coordinate to the point, in pixels. When no mouse event
+#'  has yet occured, the value of \code{dist_} will be \code{NA}.
+#'@param allRows If \code{FALSE} (the default) return a data frame containing
+#'  the selected rows. If \code{TRUE}, the input data frame will have a new
+#'  column, \code{selected_}, which indicates whether the row was inside the
+#'  selected by the mouse event (\code{TRUE}) or not (\code{FALSE}).
+#'
+#'@seealso \code{\link{plotOutput}} for more examples.
+#'
+#' @examples
+#' \dontrun{
+#' # Note that in practice, these examples would need to go in reactives
+#' # or observers.
+#'
+#' # This would select all points within 5 pixels of the click
+#' nearPoints(mtcars, input$plot_click)
+#'
+#' # Select just the nearest point within 10 pixels of the click
+#' nearPoints(mtcars, input$plot_click, threshold = 10, maxpoints = 1)
+#'
+#' }
+#'@export
+nearPoints <- function(df, coordinfo, xvar = NULL, yvar = NULL,
+                       panelvar1 = NULL, panelvar2 = NULL,
+                       threshold = 5, maxpoints = NULL, addDist = FALSE,
+                       allRows = FALSE) {
+  if (is.null(coordinfo)) {
+    if (addDist)
+      df$dist_ <- NA_real_
+
+    if (allRows)
+      df$selected_ <- FALSE
+    else
+      df <- df[0, , drop = FALSE]
+
+    return(df)
+  }
+
+  if (is.null(coordinfo$x)) {
+    stop("nearPoints requires a click/hover/double-click object with x and y values.")
+  }
+
+  # Try to extract vars from coordinfo object
+  xvar      <- xvar      %OR% coordinfo$mapping$x
+  yvar      <- yvar      %OR% coordinfo$mapping$y
+  panelvar1 <- panelvar1 %OR% coordinfo$mapping$panelvar1
+  panelvar2 <- panelvar2 %OR% coordinfo$mapping$panelvar2
+
+  if (is.null(xvar))
+    stop("nearPoints: not able to automatically infer `xvar` from coordinfo")
+  if (is.null(yvar))
+    stop("nearPoints: not able to automatically infer `yvar` from coordinfo")
+
+  # Extract data values from the data frame
+  x <- asNumber(df[[xvar]])
+  y <- asNumber(df[[yvar]])
+
+  # Get the pixel coordinates of the point
+  coordPx <- scaleCoords(coordinfo$x, coordinfo$y, coordinfo)
+
+  # Get pixel coordinates of data points
+  dataPx <- scaleCoords(x, y, coordinfo)
+
+  # Distances of data points to coordPx
+  dists <- sqrt((dataPx$x - coordPx$x) ^ 2 + (dataPx$y - coordPx$y) ^ 2)
+
+  if (addDist)
+    df$dist_ <- dists
+
+  keep_rows <- (dists <= threshold)
+
+  # Find which rows are matches for the panel vars (if present)
+  if (!is.null(panelvar1))
+    keep_rows <- keep_rows & panelMatch(coordinfo$panelvar1, df[[panelvar1]])
+  if (!is.null(panelvar2))
+    keep_rows <- keep_rows & panelMatch(coordinfo$panelvar2, df[[panelvar2]])
+
+  # Track the indices to keep
+  keep_idx <- which(keep_rows)
+
+  # Order by distance
+  dists <- dists[keep_idx]
+  keep_idx <- keep_idx[order(dists)]
+
+  # Keep max number of rows
+  if (!is.null(maxpoints) && length(keep_idx) > maxpoints) {
+    keep_idx <- keep_idx[seq_len(maxpoints)]
+  }
+
+  if (allRows) {
+    # Add selected_ column if needed
+    df$selected_ <- FALSE
+    df$selected_[keep_idx] <- TRUE
+
+  } else {
+    # If we don't keep all rows, return just the selected rows, sorted by
+    # distance.
+    df <- df[keep_idx, , drop = FALSE]
+  }
+
+  df
+}
+
+# The coordinfo data structure will look something like the examples below.
+# For base graphics, `mapping` is empty, and there are no panelvars:
+# List of 7
+#  $ x      : num 4.37
+#  $ y      : num 12
+#  $ mapping: Named list()
+#  $ domain :List of 4
+#   ..$ left  : num 1.36
+#   ..$ right : num 5.58
+#   ..$ bottom: num 9.46
+#   ..$ top   : num 34.8
+#  $ range  :List of 4
+#   ..$ left  : num 58
+#   ..$ right : num 429
+#   ..$ bottom: num 226
+#   ..$ top   : num 58
+#  $ log    :List of 2
+#   ..$ x: NULL
+#   ..$ y: NULL
+#  $ .nonce : num 0.343
+#
+# For ggplot2, the mapping vars usually will be included, and if faceting is
+# used, they will be listed as panelvars:
+# List of 9
+#  $ x        : num 3.78
+#  $ y        : num 17.1
+#  $ panelvar1: int 6
+#  $ panelvar2: int 0
+#  $ mapping  :List of 4
+#   ..$ x        : chr "wt"
+#   ..$ y        : chr "mpg"
+#   ..$ panelvar1: chr "cyl"
+#   ..$ panelvar2: chr "am"
+#  $ domain   :List of 4
+#   ..$ left  : num 1.32
+#   ..$ right : num 5.62
+#   ..$ bottom: num 9.22
+#   ..$ top   : num 35.1
+#  $ range    :List of 4
+#   ..$ left  : num 172
+#   ..$ right : num 300
+#   ..$ bottom: num 144
+#   ..$ top   : num 28.5
+#  $ log      :List of 2
+#   ..$ x: NULL
+#   ..$ y: NULL
+#  $ .nonce   : num 0.603
+
+
+
+# Coerce various types of variables to numbers. This works for Date, POSIXt,
+# characters, and factors. Used because the mouse coords are numeric.
+asNumber <- function(x) {
+  if (is.character(x)) x <- as.factor(x)
+  if (is.factor(x)) x <- as.integer(x)
+  as.numeric(x)
+}
+
+# Given a panelvar value and a vector x, return logical vector indicating which
+# items match the panelvar value. Because the panelvar value is always a
+# string but the vector could be numeric, it might be necessary to coerce the
+# panelvar to a number before comparing to the vector.
+panelMatch <- function(search_value, x) {
+  if (is.numeric(x)) search_value <- as.numeric(search_value)
+  x == search_value
+}
+
+#  ----------------------------------------------------------------------------
+# Scaling functions
+# These functions have direct analogs in Javascript code, except these are
+# vectorized for x and y.
+
+# Map a value x from a domain to a range. If clip is true, clip it to the
+# range.
+mapLinear <- function(x, domainMin, domainMax, rangeMin, rangeMax, clip = TRUE) {
+  factor <- (rangeMax - rangeMin) / (domainMax - domainMin)
+  val <- x - domainMin
+  newval <- (val * factor) + rangeMin
+
+  if (clip) {
+    maxval <- max(rangeMax, rangeMin)
+    minval <- min(rangeMax, rangeMin)
+    newval[newval > maxval] <- maxval
+    newval[newval < minval] <- minval
+  }
+  newval
+}
+
+# Scale val from domain to range. If logbase is present, use log scaling.
+scale1D <- function(val, domainMin, domainMax, rangeMin, rangeMax,
+                    logbase = NULL, clip = TRUE) {
+  if (!is.null(logbase))
+    val <- log(val, logbase)
+  mapLinear(val, domainMin, domainMax, rangeMin, rangeMax, clip)
+}
+
+# Inverse scale val, from range to domain. If logbase is present, use inverse
+# log (power) transformation.
+scaleInv1D <- function(val, domainMin, domainMax, rangeMin, rangeMax,
+                       logbase = NULL, clip = TRUE) {
+    res <- mapLinear(val, rangeMin, rangeMax, domainMin, domainMax, clip)
+    if (!is.null(logbase))
+      res <- logbase ^ res
+    res
+}
+
+# Scale x and y coordinates from domain to range, using information in
+# scaleinfo. scaleinfo must contain items $domain, $range, and $log. The
+# scaleinfo object corresponds to one element from the coordmap object generated
+# by getPrevPlotCoordmap or getGgplotCoordmap; it is the scaling information for
+# one panel in a plot.
+scaleCoords <- function(x, y, scaleinfo) {
+  if (is.null(scaleinfo))
+    return(NULL)
+
+  domain <- scaleinfo$domain
+  range <- scaleinfo$range
+  log <- scaleinfo$log
+
+  list(
+    x = scale1D(x, domain$left, domain$right, range$left, range$right, log$x),
+    y = scale1D(y, domain$bottom, domain$top, range$bottom, range$top, log$y)
+  )
+}
+
+# Inverse scale x and y coordinates from range to domain, using information in
+# scaleinfo.
+scaleInvCoords <- function(x, y, scaleinfo) {
+  if (is.null(scaleinfo))
+    return(NULL)
+
+  domain <- scaleinfo$domain
+  range <- scaleinfo$range
+  log <- scaleinfo$log
+
+  list(
+    x = scaleInv1D(x, domain$left, domain$right, range$left, range$right, log$x),
+    y = scaleInv1D(y, domain$bottom, domain$top, range$bottom, range$top, log$y)
+  )
+}

R/imageutils.R

@@ -33,20 +33,31 @@ plotPNG <- function(func, filename=tempfile(fileext='.png'),
   # Otherwise, if the Cairo package is installed, use CairoPNG().
   # Finally, if neither quartz nor Cairo, use png().
   if (capabilities("aqua")) {
-    pngfun <- png
-  } else if (getOption('shiny.usecairo', TRUE) &&
+    pngfun <- grDevices::png
+  } else if ((getOption('shiny.usecairo') %OR% TRUE) &&
              nchar(system.file(package = "Cairo"))) {
     pngfun <- Cairo::CairoPNG
   } else {
-    pngfun <- png
+    pngfun <- grDevices::png
   }
 
   pngfun(filename=filename, width=width, height=height, res=res, ...)
-  # Call plot.new() so that even if no plotting operations are performed
-  # at least we have a blank background
-  plot.new()
-  dv <- dev.cur()
-  tryCatch(shinyCallingHandlers(func()), finally = dev.off(dv))
+  # Call plot.new() so that even if no plotting operations are performed at
+  # least we have a blank background. N.B. we need to set the margin to 0
+  # temporarily before plot.new() because when the plot size is small (e.g.
+  # 200x50), we will get an error "figure margin too large", which is triggered
+  # by plot.new() with the default (large) margin. However, this does not
+  # guarantee user's code in func() will not trigger the error -- they may have
+  # to set par(mar = smaller_value) before they draw base graphics.
+  op <- graphics::par(mar = rep(0, 4))
+  tryCatch(
+    graphics::plot.new(),
+    finally = graphics::par(op)
+  )
+
+  dv <- grDevices::dev.cur()
+  on.exit(grDevices::dev.off(dv), add = TRUE)
+  func()
 
   filename
 }

R/input-action.R

@@ -0,0 +1,70 @@
+#' Action button/link
+#'
+#' Creates an action button or link whose value is initially zero, and increments by one
+#' each time it is pressed.
+#'
+#' @inheritParams textInput
+#' @param label The contents of the button or link--usually a text label, but
+#'   you could also use any other HTML, like an image.
+#' @param icon An optional \code{\link{icon}} to appear on the button.
+#' @param ... Named attributes to be applied to the button or link.
+#'
+#' @family input elements
+#' @examples
+#' \dontrun{
+#' # In server.R
+#' output$distPlot <- renderPlot({
+#'   # Take a dependency on input$goButton
+#'   input$goButton
+#'
+#'   # Use isolate() to avoid dependency on input$obs
+#'   dist <- isolate(rnorm(input$obs))
+#'   hist(dist)
+#' })
+#'
+#' # In ui.R
+#' actionButton("goButton", "Go!")
+#' }
+#'
+#' @seealso \code{\link{observeEvent}} and \code{\link{eventReactive}}
+#'
+#' @export
+actionButton <- function(inputId, label, icon = NULL, width = NULL, ...) {
+  tags$button(id=inputId,
+    style = if (!is.null(width)) paste0("width: ", validateCssUnit(width), ";"),
+    type="button",
+    class="btn btn-default action-button",
+    list(validateIcon(icon), label),
+    ...
+  )
+}
+
+#' @rdname actionButton
+#' @export
+actionLink <- function(inputId, label, icon = NULL, ...) {
+  tags$a(id=inputId,
+    href="#",
+    class="action-button",
+    list(validateIcon(icon), label),
+    ...
+  )
+}
+
+
+# Check that the icon parameter is valid:
+# 1) Check  if the user wants to actually add an icon:
+#    -- if icon=NULL, it means leave the icon unchanged
+#    -- if icon=character(0), it means don't add an icon or, more usefully,
+#       remove the previous icon
+# 2) If so, check that the icon has the right format (this does not check whether
+# it is a *real* icon - currently that would require a massive cross reference
+# with the "font-awesome" and the "glyphicon" libraries)
+validateIcon <- function(icon) {
+  if (is.null(icon) || identical(icon, character(0))) {
+    return(icon)
+  } else if (inherits(icon, "shiny.tag") && icon$name == "i") {
+    return(icon)
+  } else {
+    stop("Invalid icon. Use Shiny's 'icon()' function to generate a valid icon")
+  }
+}

R/input-checkbox.R

@@ -0,0 +1,26 @@
+#' Checkbox Input Control
+#'
+#' Create a checkbox that can be used to specify logical values.
+#'
+#' @inheritParams textInput
+#' @param value Initial value (\code{TRUE} or \code{FALSE}).
+#' @return A checkbox control that can be added to a UI definition.
+#'
+#' @family input elements
+#' @seealso \code{\link{checkboxGroupInput}}, \code{\link{updateCheckboxInput}}
+#'
+#' @examples
+#' checkboxInput("outliers", "Show outliers", FALSE)
+#' @export
+checkboxInput <- function(inputId, label, value = FALSE, width = NULL) {
+  inputTag <- tags$input(id = inputId, type="checkbox")
+  if (!is.null(value) && value)
+    inputTag$attribs$checked <- "checked"
+
+  div(class = "form-group shiny-input-container",
+    style = if (!is.null(width)) paste0("width: ", validateCssUnit(width), ";"),
+    div(class = "checkbox",
+      tags$label(inputTag, tags$span(label))
+    )
+  )
+}

R/input-checkboxgroup.R

@@ -0,0 +1,45 @@
+#' Checkbox Group Input Control
+#'
+#' Create a group of checkboxes that can be used to toggle multiple choices
+#' independently. The server will receive the input as a character vector of the
+#' selected values.
+#'
+#' @inheritParams textInput
+#' @param choices List of values to show checkboxes for. If elements of the list
+#'   are named then that name rather than the value is displayed to the user.
+#' @param selected The values that should be initially selected, if any.
+#' @param inline If \code{TRUE}, render the choices inline (i.e. horizontally)
+#' @return A list of HTML elements that can be added to a UI definition.
+#'
+#' @family input elements
+#' @seealso \code{\link{checkboxInput}}, \code{\link{updateCheckboxGroupInput}}
+#'
+#' @examples
+#' checkboxGroupInput("variable", "Variable:",
+#'                    c("Cylinders" = "cyl",
+#'                      "Transmission" = "am",
+#'                      "Gears" = "gear"))
+#'
+#' @export
+checkboxGroupInput <- function(inputId, label, choices, selected = NULL,
+  inline = FALSE, width = NULL) {
+
+  # resolve names
+  choices <- choicesWithNames(choices)
+  if (!is.null(selected))
+    selected <- validateSelected(selected, choices, inputId)
+
+  options <- generateOptions(inputId, choices, selected, inline)
+
+  divClass <- "form-group shiny-input-checkboxgroup shiny-input-container"
+  if (inline)
+    divClass <- paste(divClass, "shiny-input-container-inline")
+
+  # return label and select tag
+  tags$div(id = inputId,
+    style = if (!is.null(width)) paste0("width: ", validateCssUnit(width), ";"),
+    class = divClass,
+    controlLabel(inputId, label),
+    options
+  )
+}

R/input-date.R

@@ -0,0 +1,102 @@
+#' Create date input
+#'
+#' Creates a text input which, when clicked on, brings up a calendar that
+#' the user can click on to select dates.
+#'
+#' The date \code{format} string specifies how the date will be displayed in
+#' the browser. It allows the following values:
+#'
+#' \itemize{
+#'   \item \code{yy} Year without century (12)
+#'   \item \code{yyyy} Year with century (2012)
+#'   \item \code{mm} Month number, with leading zero (01-12)
+#'   \item \code{m} Month number, without leading zero (01-12)
+#'   \item \code{M} Abbreviated month name
+#'   \item \code{MM} Full month name
+#'   \item \code{dd} Day of month with leading zero
+#'   \item \code{d} Day of month without leading zero
+#'   \item \code{D} Abbreviated weekday name
+#'   \item \code{DD} Full weekday name
+#' }
+#'
+#' @inheritParams textInput
+#' @param value The starting date. Either a Date object, or a string in
+#'   \code{yyyy-mm-dd} format. If NULL (the default), will use the current
+#'   date in the client's time zone.
+#' @param min The minimum allowed date. Either a Date object, or a string in
+#'   \code{yyyy-mm-dd} format.
+#' @param max The maximum allowed date. Either a Date object, or a string in
+#'   \code{yyyy-mm-dd} format.
+#' @param format The format of the date to display in the browser. Defaults to
+#'   \code{"yyyy-mm-dd"}.
+#' @param startview The date range shown when the input object is first
+#'   clicked. Can be "month" (the default), "year", or "decade".
+#' @param weekstart Which day is the start of the week. Should be an integer
+#'   from 0 (Sunday) to 6 (Saturday).
+#' @param language The language used for month and day names. Default is "en".
+#'   Other valid values include "bg", "ca", "cs", "da", "de", "el", "es", "fi",
+#'   "fr", "he", "hr", "hu", "id", "is", "it", "ja", "kr", "lt", "lv", "ms",
+#'   "nb", "nl", "pl", "pt", "pt-BR", "ro", "rs", "rs-latin", "ru", "sk", "sl",
+#'   "sv", "sw", "th", "tr", "uk", "zh-CN", and "zh-TW".
+#'
+#' @family input elements
+#' @seealso \code{\link{dateRangeInput}}, \code{\link{updateDateInput}}
+#'
+#' @examples
+#' dateInput("date", "Date:", value = "2012-02-29")
+#'
+#' # Default value is the date in client's time zone
+#' dateInput("date", "Date:")
+#'
+#' # value is always yyyy-mm-dd, even if the display format is different
+#' dateInput("date", "Date:", value = "2012-02-29", format = "mm/dd/yy")
+#'
+#' # Pass in a Date object
+#' dateInput("date", "Date:", value = Sys.Date()-10)
+#'
+#' # Use different language and different first day of week
+#' dateInput("date", "Date:",
+#'           language = "de",
+#'           weekstart = 1)
+#'
+#' # Start with decade view instead of default month view
+#' dateInput("date", "Date:",
+#'           startview = "decade")
+#'
+#' @export
+dateInput <- function(inputId, label, value = NULL, min = NULL, max = NULL,
+  format = "yyyy-mm-dd", startview = "month", weekstart = 0, language = "en",
+  width = NULL) {
+
+  # If value is a date object, convert it to a string with yyyy-mm-dd format
+  # Same for min and max
+  if (inherits(value, "Date"))  value <- format(value, "%Y-%m-%d")
+  if (inherits(min,   "Date"))  min   <- format(min,   "%Y-%m-%d")
+  if (inherits(max,   "Date"))  max   <- format(max,   "%Y-%m-%d")
+
+  attachDependencies(
+    tags$div(id = inputId,
+      class = "shiny-date-input form-group shiny-input-container",
+      style = if (!is.null(width)) paste0("width: ", validateCssUnit(width), ";"),
+
+      controlLabel(inputId, label),
+      tags$input(type = "text",
+                 # datepicker class necessary for dropdown to display correctly
+                 class = "form-control datepicker",
+                 `data-date-language` = language,
+                 `data-date-weekstart` = weekstart,
+                 `data-date-format` = format,
+                 `data-date-start-view` = startview,
+                 `data-min-date` = min,
+                 `data-max-date` = max,
+                 `data-initial-date` = value
+      )
+    ),
+    datePickerDependency
+  )
+}
+
+datePickerDependency <- htmlDependency(
+  "bootstrap-datepicker", "1.0.2", c(href = "shared/datepicker"),
+  script = "js/bootstrap-datepicker.min.js",
+  stylesheet = "css/datepicker.css")

R/input-daterange.R

@@ -0,0 +1,113 @@
+#' Create date range input
+#'
+#' Creates a pair of text inputs which, when clicked on, bring up calendars that
+#' the user can click on to select dates.
+#'
+#' The date \code{format} string specifies how the date will be displayed in
+#' the browser. It allows the following values:
+#'
+#' \itemize{
+#'   \item \code{yy} Year without century (12)
+#'   \item \code{yyyy} Year with century (2012)
+#'   \item \code{mm} Month number, with leading zero (01-12)
+#'   \item \code{m} Month number, without leading zero (01-12)
+#'   \item \code{M} Abbreviated month name
+#'   \item \code{MM} Full month name
+#'   \item \code{dd} Day of month with leading zero
+#'   \item \code{d} Day of month without leading zero
+#'   \item \code{D} Abbreviated weekday name
+#'   \item \code{DD} Full weekday name
+#' }
+#'
+#' @inheritParams dateInput
+#' @param start The initial start date. Either a Date object, or a string in
+#'   \code{yyyy-mm-dd} format. If NULL (the default), will use the current
+#'   date in the client's time zone.
+#' @param end The initial end date. Either a Date object, or a string in
+#'   \code{yyyy-mm-dd} format. If NULL (the default), will use the current
+#'   date in the client's time zone.
+#' @param separator String to display between the start and end input boxes.
+#'
+#' @family input elements
+#' @seealso \code{\link{dateInput}}, \code{\link{updateDateRangeInput}}
+#'
+#' @examples
+#' dateRangeInput("daterange", "Date range:",
+#'                start = "2001-01-01",
+#'                end   = "2010-12-31")
+#'
+#' # Default start and end is the current date in the client's time zone
+#' dateRangeInput("daterange", "Date range:")
+#'
+#' # start and end are always specified in yyyy-mm-dd, even if the display
+#' # format is different
+#' dateRangeInput("daterange", "Date range:",
+#'                start  = "2001-01-01",
+#'                end    = "2010-12-31",
+#'                min    = "2001-01-01",
+#'                max    = "2012-12-21",
+#'                format = "mm/dd/yy",
+#'                separator = " - ")
+#'
+#' # Pass in Date objects
+#' dateRangeInput("daterange", "Date range:",
+#'                start = Sys.Date()-10,
+#'                end = Sys.Date()+10)
+#'
+#' # Use different language and different first day of week
+#' dateRangeInput("daterange", "Date range:",
+#'                language = "de",
+#'                weekstart = 1)
+#'
+#' # Start with decade view instead of default month view
+#' dateRangeInput("daterange", "Date range:",
+#'                startview = "decade")
+#'
+#' @export
+dateRangeInput <- function(inputId, label, start = NULL, end = NULL,
+    min = NULL, max = NULL, format = "yyyy-mm-dd", startview = "month",
+    weekstart = 0, language = "en", separator = " to ", width = NULL) {
+
+  # If start and end are date objects, convert to a string with yyyy-mm-dd format
+  # Same for min and max
+  if (inherits(start, "Date"))  start <- format(start, "%Y-%m-%d")
+  if (inherits(end,   "Date"))  end   <- format(end,   "%Y-%m-%d")
+  if (inherits(min,   "Date"))  min   <- format(min,   "%Y-%m-%d")
+  if (inherits(max,   "Date"))  max   <- format(max,   "%Y-%m-%d")
+
+  attachDependencies(
+    div(id = inputId,
+      class = "shiny-date-range-input form-group shiny-input-container",
+      style = if (!is.null(width)) paste0("width: ", validateCssUnit(width), ";"),
+
+      controlLabel(inputId, label),
+      # input-daterange class is needed for dropdown behavior
+      div(class = "input-daterange input-group",
+        tags$input(
+          class = "input-sm form-control",
+          type = "text",
+          `data-date-language` = language,
+          `data-date-weekstart` = weekstart,
+          `data-date-format` = format,
+          `data-date-start-view` = startview,
+          `data-min-date` = min,
+          `data-max-date` = max,
+          `data-initial-date` = start
+        ),
+        span(class = "input-group-addon", separator),
+        tags$input(
+          class = "input-sm form-control",
+          type = "text",
+          `data-date-language` = language,
+          `data-date-weekstart` = weekstart,
+          `data-date-format` = format,
+          `data-date-start-view` = startview,
+          `data-min-date` = min,
+          `data-max-date` = max,
+          `data-initial-date` = end
+        )
+      )
+    ),
+    datePickerDependency
+  )
+}

R/input-file.R

@@ -0,0 +1,51 @@
+#' File Upload Control
+#'
+#' Create a file upload control that can be used to upload one or more files.
+#'
+#' Whenever a file upload completes, the corresponding input variable is set
+#' to a dataframe. This dataframe contains one row for each selected file, and
+#' the following columns:
+#' \describe{
+#'   \item{\code{name}}{The filename provided by the web browser. This is
+#'   \strong{not} the path to read to get at the actual data that was uploaded
+#'   (see
+#'   \code{datapath} column).}
+#'   \item{\code{size}}{The size of the uploaded data, in
+#'   bytes.}
+#'   \item{\code{type}}{The MIME type reported by the browser (for example,
+#'   \code{text/plain}), or empty string if the browser didn't know.}
+#'   \item{\code{datapath}}{The path to a temp file that contains the data that was
+#'   uploaded. This file may be deleted if the user performs another upload
+#'   operation.}
+#' }
+#'
+#' @family input elements
+#'
+#' @inheritParams textInput
+#' @param multiple Whether the user should be allowed to select and upload
+#'   multiple files at once. \bold{Does not work on older browsers, including
+#'   Internet Explorer 9 and earlier.}
+#' @param accept A character vector of MIME types; gives the browser a hint of
+#'   what kind of files the server is expecting.
+#'
+#' @export
+fileInput <- function(inputId, label, multiple = FALSE, accept = NULL,
+  width = NULL) {
+
+  inputTag <- tags$input(id = inputId, name = inputId, type = "file")
+  if (multiple)
+    inputTag$attribs$multiple <- "multiple"
+  if (length(accept) > 0)
+    inputTag$attribs$accept <- paste(accept, collapse=',')
+
+  div(class = "form-group shiny-input-container",
+    style = if (!is.null(width)) paste0("width: ", validateCssUnit(width), ";"),
+    label %AND% tags$label(label),
+    inputTag,
+    tags$div(
+      id=paste(inputId, "_progress", sep=""),
+      class="progress progress-striped active shiny-file-input-progress",
+      tags$div(class="progress-bar")
+    )
+  )
+}

R/input-numeric.R

@@ -0,0 +1,37 @@
+
+#' Create a numeric input control
+#'
+#' Create an input control for entry of numeric values
+#'
+#' @inheritParams textInput
+#' @param min Minimum allowed value
+#' @param max Maximum allowed value
+#' @param step Interval to use when stepping between min and max
+#' @return A numeric input control that can be added to a UI definition.
+#'
+#' @family input elements
+#' @seealso \code{\link{updateNumericInput}}
+#'
+#' @examples
+#' numericInput("obs", "Observations:", 10,
+#'              min = 1, max = 100)
+#' @export
+numericInput <- function(inputId, label, value, min = NA, max = NA, step = NA,
+  width = NULL) {
+
+  # build input tag
+  inputTag <- tags$input(id = inputId, type = "number", class="form-control",
+                         value = formatNoSci(value))
+  if (!is.na(min))
+    inputTag$attribs$min = min
+  if (!is.na(max))
+    inputTag$attribs$max = max
+  if (!is.na(step))
+    inputTag$attribs$step = step
+
+  div(class = "form-group shiny-input-container",
+    style = if (!is.null(width)) paste0("width: ", validateCssUnit(width), ";"),
+    label %AND% tags$label(label, `for` = inputId),
+    inputTag
+  )
+}

R/input-password.R

@@ -0,0 +1,20 @@
+#' Create a password input control
+#'
+#' Create an password control for entry of passwords.
+#'
+#' @inheritParams textInput
+#' @return A text input control that can be added to a UI definition.
+#'
+#' @family input elements
+#' @seealso \code{\link{updateTextInput}}
+#'
+#' @examples
+#' passwordInput("password", "Password:")
+#' @export
+passwordInput <- function(inputId, label, value = "", width = NULL) {
+  div(class = "form-group shiny-input-container",
+    style = if (!is.null(width)) paste0("width: ", validateCssUnit(width), ";"),
+    label %AND% tags$label(label, `for` = inputId),
+    tags$input(id = inputId, type="password", class="form-control", value=value)
+  )
+}

R/input-radiobuttons.R

@@ -0,0 +1,54 @@
+#' Create radio buttons
+#'
+#' Create a set of radio buttons used to select an item from a list.
+#'
+#' If you need to represent a "None selected" state, it's possible to default
+#' the radio buttons to have no options selected by using
+#' \code{selected = character(0)}. However, this is not recommended, as it gives
+#' the user no way to return to that state once they've made a selection.
+#' Instead, consider having the first of your choices be \code{c("None selected"
+#' = "")}.
+#'
+#' @inheritParams textInput
+#' @param choices List of values to select from (if elements of the list are
+#' named then that name rather than the value is displayed to the user)
+#' @param selected The initially selected value (if not specified then
+#' defaults to the first value)
+#' @param inline If \code{TRUE}, render the choices inline (i.e. horizontally)
+#' @return A set of radio buttons that can be added to a UI definition.
+#'
+#' @family input elements
+#' @seealso \code{\link{updateRadioButtons}}
+#'
+#' @examples
+#' radioButtons("dist", "Distribution type:",
+#'              c("Normal" = "norm",
+#'                "Uniform" = "unif",
+#'                "Log-normal" = "lnorm",
+#'                "Exponential" = "exp"))
+#' @export
+radioButtons <- function(inputId, label, choices, selected = NULL,
+  inline = FALSE, width = NULL) {
+
+  # resolve names
+  choices <- choicesWithNames(choices)
+
+  # default value if it's not specified
+  selected <- if (is.null(selected)) choices[[1]] else {
+    validateSelected(selected, choices, inputId)
+  }
+  if (length(selected) > 1) stop("The 'selected' argument must be of length 1")
+
+  options <- generateOptions(inputId, choices, selected, inline, type = 'radio')
+
+  divClass <- "form-group shiny-input-radiogroup shiny-input-container"
+  if (inline)
+    divClass <- paste(divClass, "shiny-input-container-inline")
+
+  tags$div(id = inputId,
+    style = if (!is.null(width)) paste0("width: ", validateCssUnit(width), ";"),
+    class = divClass,
+    controlLabel(inputId, label),
+    options
+  )
+}

R/input-select.R

@@ -0,0 +1,174 @@
+#' Create a select list input control
+#'
+#' Create a select list that can be used to choose a single or multiple items
+#' from a list of values.
+#'
+#' By default, \code{selectInput()} and \code{selectizeInput()} use the
+#' JavaScript library \pkg{selectize.js}
+#' (\url{https://github.com/brianreavis/selectize.js}) to instead of the basic
+#' select input element. To use the standard HTML select input element, use
+#' \code{selectInput()} with \code{selectize=FALSE}.
+#'
+#' In selectize mode, if the first element in \code{choices} has a value of
+#' \code{""}, its name will be treated as a placeholder prompt. For example:
+#' \code{selectInput("letter", "Letter", c("Choose one" = "", LETTERS))}
+#'
+#' @inheritParams textInput
+#' @param choices List of values to select from. If elements of the list are
+#'   named then that name rather than the value is displayed to the user.
+#' @param selected The initially selected value (or multiple values if
+#'   \code{multiple = TRUE}). If not specified then defaults to the first value
+#'   for single-select lists and no values for multiple select lists.
+#' @param multiple Is selection of multiple items allowed?
+#' @param selectize Whether to use \pkg{selectize.js} or not.
+#' @param size Number of items to show in the selection box; a larger number
+#'   will result in a taller box. Not compatible with \code{selectize=TRUE}.
+#'   Normally, when \code{multiple=FALSE}, a select input will be a drop-down
+#'   list, but when \code{size} is set, it will be a box instead.
+#' @return A select list control that can be added to a UI definition.
+#'
+#' @family input elements
+#' @seealso \code{\link{updateSelectInput}}
+#'
+#' @examples
+#' selectInput("variable", "Variable:",
+#'             c("Cylinders" = "cyl",
+#'               "Transmission" = "am",
+#'               "Gears" = "gear"))
+#' @export
+selectInput <- function(inputId, label, choices, selected = NULL,
+                        multiple = FALSE, selectize = TRUE, width = NULL,
+                        size = NULL) {
+  # resolve names
+  choices <- choicesWithNames(choices)
+
+  # default value if it's not specified
+  if (is.null(selected)) {
+    if (!multiple) selected <- firstChoice(choices)
+  } else selected <- validateSelected(selected, choices, inputId)
+
+  if (!is.null(size) && selectize) {
+    stop("'size' argument is incompatible with 'selectize=TRUE'.")
+  }
+
+  # create select tag and add options
+  selectTag <- tags$select(
+    id = inputId,
+    class = if (!selectize) "form-control",
+    size = size,
+    selectOptions(choices, selected)
+  )
+  if (multiple)
+    selectTag$attribs$multiple <- "multiple"
+
+  # return label and select tag
+  res <- div(
+    class = "form-group shiny-input-container",
+    style = if (!is.null(width)) paste0("width: ", validateCssUnit(width), ";"),
+    controlLabel(inputId, label),
+    div(selectTag)
+  )
+
+  if (!selectize) return(res)
+
+  selectizeIt(inputId, res, NULL, nonempty = !multiple && !("" %in% choices))
+}
+
+firstChoice <- function(choices) {
+  if (length(choices) == 0L) return()
+  choice <- choices[[1]]
+  if (is.list(choice)) firstChoice(choice) else choice
+}
+
+# Create tags for each of the options; use <optgroup> if necessary.
+# This returns a HTML string instead of tags, because of the 'selected'
+# attribute.
+selectOptions <- function(choices, selected = NULL) {
+  html <- mapply(choices, names(choices), FUN = function(choice, label) {
+    if (is.list(choice)) {
+      # If sub-list, create an optgroup and recurse into the sublist
+      sprintf(
+        '<optgroup label="%s">\n%s\n</optgroup>',
+        htmlEscape(label, TRUE),
+        selectOptions(choice, selected)
+      )
+
+    } else {
+      # If single item, just return option string
+      sprintf(
+        '<option value="%s"%s>%s</option>',
+        htmlEscape(choice, TRUE),
+        if (choice %in% selected) ' selected' else '',
+        htmlEscape(label)
+      )
+    }
+  })
+
+  HTML(paste(html, collapse = '\n'))
+}
+
+# need <optgroup> when choices contains sub-lists
+needOptgroup <- function(choices) {
+  any(vapply(choices, is.list, logical(1)))
+}
+
+#' @rdname selectInput
+#' @param ... Arguments passed to \code{selectInput()}.
+#' @param options A list of options. See the documentation of \pkg{selectize.js}
+#'   for possible options (character option values inside \code{\link{I}()} will
+#'   be treated as literal JavaScript code; see \code{\link{renderDataTable}()}
+#'   for details).
+#' @param width The width of the input, e.g. \code{'400px'}, or \code{'100\%'};
+#'   see \code{\link{validateCssUnit}}.
+#' @note The selectize input created from \code{selectizeInput()} allows
+#'   deletion of the selected option even in a single select input, which will
+#'   return an empty string as its value. This is the default behavior of
+#'   \pkg{selectize.js}. However, the selectize input created from
+#'   \code{selectInput(..., selectize = TRUE)} will ignore the empty string
+#'   value when it is a single choice input and the empty string is not in the
+#'   \code{choices} argument. This is to keep compatibility with
+#'   \code{selectInput(..., selectize = FALSE)}.
+#' @export
+selectizeInput <- function(inputId, ..., options = NULL, width = NULL) {
+  selectizeIt(
+    inputId,
+    selectInput(inputId, ..., selectize = FALSE, width = width),
+    options
+  )
+}
+
+# given a select input and its id, selectize it
+selectizeIt <- function(inputId, select, options, nonempty = FALSE) {
+  res <- checkAsIs(options)
+
+  selectizeDep <- htmlDependency(
+    "selectize", "0.11.2", c(href = "shared/selectize"),
+    stylesheet = "css/selectize.bootstrap3.css",
+    head = format(tagList(
+      HTML('<!--[if lt IE 9]>'),
+      tags$script(src = 'shared/selectize/js/es5-shim.min.js'),
+      HTML('<![endif]-->'),
+      tags$script(src = 'shared/selectize/js/selectize.min.js')
+    ))
+  )
+
+  if ('drag_drop' %in% options$plugins) {
+    selectizeDep <- list(selectizeDep, htmlDependency(
+      'jqueryui', '1.11.4', c(href = 'shared/jqueryui'),
+      script = 'jquery-ui.min.js'
+    ))
+  }
+
+  # Insert script on same level as <select> tag
+  select$children[[2]] <- tagAppendChild(
+    select$children[[2]],
+    tags$script(
+      type = 'application/json',
+      `data-for` = inputId, `data-nonempty` = if (nonempty) '',
+      `data-eval` = if (length(res$eval)) HTML(toJSON(res$eval)),
+      if (length(res$options)) HTML(toJSON(res$options)) else '{}'
+    )
+  )
+
+  attachDependencies(select, selectizeDep)
+}

R/input-slider.R

@@ -0,0 +1,234 @@
+#' Slider Input Widget
+#'
+#' Constructs a slider widget to select a numeric value from a range.
+#'
+#' @inheritParams textInput
+#' @param min The minimum value (inclusive) that can be selected.
+#' @param max The maximum value (inclusive) that can be selected.
+#' @param value The initial value of the slider. A numeric vector of length one
+#'   will create a regular slider; a numeric vector of length two will create a
+#'   double-ended range slider. A warning will be issued if the value doesn't
+#'   fit between \code{min} and \code{max}.
+#' @param step Specifies the interval between each selectable value on the
+#'   slider (if \code{NULL}, a heuristic is used to determine the step size). If
+#'   the values are dates, \code{step} is in days; if the values are times
+#'   (POSIXt), \code{step} is in seconds.
+#' @param round \code{TRUE} to round all values to the nearest integer;
+#'   \code{FALSE} if no rounding is desired; or an integer to round to that
+#'   number of digits (for example, 1 will round to the nearest 10, and -2 will
+#'   round to the nearest .01). Any rounding will be applied after snapping to
+#'   the nearest step.
+#' @param format Deprecated.
+#' @param locale Deprecated.
+#' @param ticks \code{FALSE} to hide tick marks, \code{TRUE} to show them
+#'   according to some simple heuristics.
+#' @param animate \code{TRUE} to show simple animation controls with default
+#'   settings; \code{FALSE} not to; or a custom settings list, such as those
+#'   created using \code{\link{animationOptions}}.
+#' @param sep Separator between thousands places in numbers.
+#' @param pre A prefix string to put in front of the value.
+#' @param post A suffix string to put after the value.
+#' @param dragRange This option is used only if it is a range slider (with two
+#'   values). If \code{TRUE} (the default), the range can be dragged. In other
+#'   words, the min and max can be dragged together. If \code{FALSE}, the range
+#'   cannot be dragged.
+#' @param timeFormat Only used if the values are Date or POSIXt objects. A time
+#'   format string, to be passed to the Javascript strftime library. See
+#'   \url{https://github.com/samsonjs/strftime} for more details. The allowed
+#'   format specifications are very similar, but not identical, to those for R's
+#'   \code{\link{strftime}} function. For Dates, the default is \code{"\%F"}
+#'   (like \code{"2015-07-01"}), and for POSIXt, the default is \code{"\%F \%T"}
+#'   (like \code{"2015-07-01 15:32:10"}).
+#' @param timezone Only used if the values are POSIXt objects. A string
+#'   specifying the time zone offset for the displayed times, in the format
+#'   \code{"+HHMM"} or \code{"-HHMM"}. If \code{NULL} (the default), times will
+#'   be displayed in the browser's time zone. The value \code{"+0000"} will
+#'   result in UTC time.
+#' @inheritParams selectizeInput
+#' @family input elements
+#' @seealso \code{\link{updateSliderInput}}
+#'
+#' @export
+sliderInput <- function(inputId, label, min, max, value, step = NULL,
+                        round = FALSE, format = NULL, locale = NULL,
+                        ticks = TRUE, animate = FALSE, width = NULL, sep = ",",
+                        pre = NULL, post = NULL, timeFormat = NULL,
+                        timezone = NULL, dragRange = TRUE)
+{
+  if (!missing(format)) {
+    shinyDeprecated(msg = "The `format` argument to sliderInput is deprecated. Use `sep`, `pre`, and `post` instead.",
+                    version = "0.10.2.2")
+  }
+  if (!missing(locale)) {
+    shinyDeprecated(msg = "The `locale` argument to sliderInput is deprecated. Use `sep`, `pre`, and `post` instead.",
+                    version = "0.10.2.2")
+  }
+
+  # If step is NULL, use heuristic to set the step size.
+  findStepSize <- function(min, max, step) {
+    if (!is.null(step)) return(step)
+
+    range <- max - min
+    # If short range or decimals, use continuous decimal with ~100 points
+    if (range < 2 || hasDecimals(min) || hasDecimals(max)) {
+      step <- pretty(c(min, max), n = 100)
+      step[2] - step[1]
+    } else {
+      1
+    }
+  }
+
+  if (inherits(min, "Date")) {
+    if (!inherits(max, "Date") || !inherits(value, "Date"))
+      stop("`min`, `max`, and `value must all be Date or non-Date objects")
+    dataType <- "date"
+
+    if (is.null(timeFormat))
+      timeFormat <- "%F"
+
+  } else if (inherits(min, "POSIXt")) {
+    if (!inherits(max, "POSIXt") || !inherits(value, "POSIXt"))
+      stop("`min`, `max`, and `value must all be POSIXt or non-POSIXt objects")
+    dataType <- "datetime"
+
+    if (is.null(timeFormat))
+      timeFormat <- "%F %T"
+
+  } else {
+    dataType <- "number"
+  }
+
+  step <- findStepSize(min, max, step)
+
+  if (dataType %in% c("date", "datetime")) {
+    # For Dates, this conversion uses midnight on that date in UTC
+    to_ms <- function(x) 1000 * as.numeric(as.POSIXct(x))
+
+    # Convert values to milliseconds since epoch (this is the value JS uses)
+    # Find step size in ms
+    step  <- to_ms(max) - to_ms(max - step)
+    min   <- to_ms(min)
+    max   <- to_ms(max)
+    value <- to_ms(value)
+  }
+
+  range <- max - min
+
+  # Try to get a sane number of tick marks
+  if (ticks) {
+    n_steps <- range / step
+
+    # Make sure there are <= 10 steps.
+    # n_ticks can be a noninteger, which is good when the range is not an
+    # integer multiple of the step size, e.g., min=1, max=10, step=4
+    scale_factor <- ceiling(n_steps / 10)
+    n_ticks <- n_steps / scale_factor
+
+  } else {
+    n_ticks <- NULL
+  }
+
+  sliderProps <- dropNulls(list(
+    class = "js-range-slider",
+    id = inputId,
+    `data-type` = if (length(value) > 1) "double",
+    `data-min` = formatNoSci(min),
+    `data-max` = formatNoSci(max),
+    `data-from` = formatNoSci(value[1]),
+    `data-to` = if (length(value) > 1) formatNoSci(value[2]),
+    `data-step` = formatNoSci(step),
+    `data-grid` = ticks,
+    `data-grid-num` = n_ticks,
+    `data-grid-snap` = FALSE,
+    `data-prettify-separator` = sep,
+    `data-prefix` = pre,
+    `data-postfix` = post,
+    `data-keyboard` = TRUE,
+    `data-keyboard-step` = step / (max - min) * 100,
+    `data-drag-interval` = dragRange,
+    # The following are ignored by the ion.rangeSlider, but are used by Shiny.
+    `data-data-type` = dataType,
+    `data-time-format` = timeFormat,
+    `data-timezone` = timezone
+  ))
+
+  # Replace any TRUE and FALSE with "true" and "false"
+  sliderProps <- lapply(sliderProps, function(x) {
+    if (identical(x, TRUE)) "true"
+    else if (identical(x, FALSE)) "false"
+    else x
+  })
+
+  sliderTag <- div(class = "form-group shiny-input-container",
+    style = if (!is.null(width)) paste0("width: ", validateCssUnit(width), ";"),
+    if (!is.null(label)) controlLabel(inputId, label),
+    do.call(tags$input, sliderProps)
+  )
+
+  # Add animation buttons
+  if (identical(animate, TRUE))
+    animate <- animationOptions()
+
+  if (!is.null(animate) && !identical(animate, FALSE)) {
+    if (is.null(animate$playButton))
+      animate$playButton <- icon('play', lib = 'glyphicon')
+    if (is.null(animate$pauseButton))
+      animate$pauseButton <- icon('pause', lib = 'glyphicon')
+
+    sliderTag <- tagAppendChild(
+      sliderTag,
+      tags$div(class='slider-animate-container',
+        tags$a(href='#',
+          class='slider-animate-button',
+          'data-target-id'=inputId,
+          'data-interval'=animate$interval,
+          'data-loop'=animate$loop,
+          span(class = 'play', animate$playButton),
+          span(class = 'pause', animate$pauseButton)
+        )
+      )
+    )
+  }
+
+  dep <- list(
+    htmlDependency("ionrangeslider", "2.1.2", c(href="shared/ionrangeslider"),
+      script = "js/ion.rangeSlider.min.js",
+      # ion.rangeSlider also needs normalize.css, which is already included in
+      # Bootstrap.
+      stylesheet = c("css/ion.rangeSlider.css",
+                     "css/ion.rangeSlider.skinShiny.css")
+    ),
+    htmlDependency("strftime", "0.9.2", c(href="shared/strftime"),
+      script = "strftime-min.js"
+    )
+  )
+
+  attachDependencies(sliderTag, dep)
+}
+
+hasDecimals <- function(value) {
+  truncatedValue <- round(value)
+  return (!identical(value, truncatedValue))
+}
+
+#' @rdname sliderInput
+#'
+#' @param interval The interval, in milliseconds, between each animation step.
+#' @param loop \code{TRUE} to automatically restart the animation when it
+#'   reaches the end.
+#' @param playButton Specifies the appearance of the play button. Valid values
+#'   are a one-element character vector (for a simple text label), an HTML tag
+#'   or list of tags (using \code{\link{tag}} and friends), or raw HTML (using
+#'   \code{\link{HTML}}).
+#' @param pauseButton Similar to \code{playButton}, but for the pause button.
+#'
+#' @export
+animationOptions <- function(interval=1000,
+                             loop=FALSE,
+                             playButton=NULL,
+                             pauseButton=NULL) {
+  list(interval=interval,
+       loop=loop,
+       playButton=playButton,
+       pauseButton=pauseButton)
+}

R/input-submit.R

@@ -0,0 +1,28 @@
+#' Create a submit button
+#'
+#' Create a submit button for an input form. Forms that include a submit
+#' button do not automatically update their outputs when inputs change,
+#' rather they wait until the user explicitly clicks the submit button.
+#'
+#' @param text Button caption
+#' @param icon Optional \code{\link{icon}} to appear on the button
+#' @param width The width of the button, e.g. \code{'400px'}, or \code{'100\%'};
+#'   see \code{\link{validateCssUnit}}.
+#' @return A submit button that can be added to a UI definition.
+#'
+#' @family input elements
+#'
+#' @examples
+#' submitButton("Update View")
+#' submitButton("Update View", icon("refresh"))
+#' @export
+submitButton <- function(text = "Apply Changes", icon = NULL, width = NULL) {
+  div(
+    tags$button(
+      type="submit",
+      class="btn btn-primary",
+      style = if (!is.null(width)) paste0("width: ", validateCssUnit(width), ";"),
+      list(icon, text)
+    )
+  )
+}

R/input-text.R

@@ -0,0 +1,30 @@
+#' Create a text input control
+#'
+#' Create an input control for entry of unstructured text values
+#'
+#' @param inputId The \code{input} slot that will be used to access the value.
+#' @param label Display label for the control, or \code{NULL} for no label.
+#' @param value Initial value.
+#' @param width The width of the input, e.g. \code{'400px'}, or \code{'100\%'};
+#'   see \code{\link{validateCssUnit}}.
+#' @param placeholder A character string giving the user a hint as to what can
+#'   be entered into the control. Internet Explorer 8 and 9 do not support this
+#'   option.
+#' @return A text input control that can be added to a UI definition.
+#'
+#' @family input elements
+#' @seealso \code{\link{updateTextInput}}
+#'
+#' @examples
+#' textInput("caption", "Caption:", "Data Summary")
+#' @export
+textInput <- function(inputId, label, value = "", width = NULL,
+  placeholder = NULL) {
+
+  div(class = "form-group shiny-input-container",
+    style = if (!is.null(width)) paste0("width: ", validateCssUnit(width), ";"),
+    label %AND% tags$label(label, `for` = inputId),
+    tags$input(id = inputId, type="text", class="form-control", value=value,
+      placeholder = placeholder)
+  )
+}

R/input-utils.R

@@ -0,0 +1,105 @@
+controlLabel <- function(controlName, label) {
+  label %AND% tags$label(class = "control-label", `for` = controlName, label)
+}
+
+
+# Before shiny 0.9, `selected` refers to names/labels of `choices`; now it
+# refers to values. Below is a function for backward compatibility.
+validateSelected <- function(selected, choices, inputId) {
+  # drop names, otherwise toJSON() keeps them too
+  selected <- unname(selected)
+  # if you are using optgroups, you're using shiny > 0.10.0, and you should
+  # already know that `selected` must be a value instead of a label
+  if (needOptgroup(choices)) return(selected)
+
+  if (is.list(choices)) choices <- unlist(choices)
+
+  nms <- names(choices)
+  # labels and values are identical, no need to validate
+  if (identical(nms, unname(choices))) return(selected)
+  # when selected labels instead of values
+  i <- (selected %in% nms) & !(selected %in% choices)
+  if (any(i)) {
+    warnFun <- if (all(i)) {
+      # replace names with values
+      selected <- unname(choices[selected])
+      warning
+    } else stop  # stop when it is ambiguous (some labels == values)
+    warnFun("'selected' must be the values instead of names of 'choices' ",
+            "for the input '", inputId, "'")
+  }
+  selected
+}
+
+
+# generate options for radio buttons and checkbox groups (type = 'checkbox' or
+# 'radio')
+generateOptions <- function(inputId, choices, selected, inline, type = 'checkbox') {
+  # generate a list of <input type=? [checked] />
+  options <- mapply(
+    choices, names(choices),
+    FUN = function(value, name) {
+      inputTag <- tags$input(
+        type = type, name = inputId, value = value
+      )
+      if (value %in% selected)
+        inputTag$attribs$checked <- "checked"
+
+      # If inline, there's no wrapper div, and the label needs a class like
+      # checkbox-inline.
+      if (inline) {
+        tags$label(class = paste0(type, "-inline"), inputTag, tags$span(name))
+      } else {
+        tags$div(class = type,
+          tags$label(inputTag, tags$span(name))
+        )
+      }
+    },
+    SIMPLIFY = FALSE, USE.NAMES = FALSE
+  )
+
+  div(class = "shiny-options-group", options)
+}
+
+
+# Takes a vector or list, and adds names (same as the value) to any entries
+# without names.
+choicesWithNames <- function(choices) {
+  # Take a vector or list, and convert to list. Also, if any children are
+  # vectors with length > 1, convert those to list. If the list is unnamed,
+  # convert it to a named list with blank names.
+  listify <- function(obj) {
+    # If a list/vector is unnamed, give it blank names
+    makeNamed <- function(x) {
+      if (is.null(names(x))) names(x) <- character(length(x))
+      x
+    }
+
+    res <- lapply(obj, function(val) {
+      if (is.list(val))
+        listify(val)
+      else if (length(val) == 1 && is.null(names(val)))
+        val
+      else
+        makeNamed(as.list(val))
+    })
+
+    makeNamed(res)
+  }
+
+  choices <- listify(choices)
+  if (length(choices) == 0) return(choices)
+
+  # Recurse into any subgroups
+  choices <- mapply(choices, names(choices), FUN = function(choice, name) {
+    if (!is.list(choice)) return(choice)
+    if (name == "") stop('All sub-lists in "choices" must be named.')
+    choicesWithNames(choice)
+  }, SIMPLIFY = FALSE)
+
+  # default missing names to choice values
+  missing <- names(choices) == ""
+  names(choices)[missing] <- as.character(choices)[missing]
+
+  choices
+}

R/jqueryui.R

@@ -82,7 +82,7 @@ absolutePanel <- function(...,
     return(tagList(
       # IMPORTANT NOTE: If you update jqueryui, make sure you DON'T include the datepicker,
       # as it collides with our bootstrap datepicker!
-      singleton(tags$head(tags$script(src='shared/jqueryui/1.10.4/jquery-ui.min.js'))),
+      singleton(tags$head(tags$script(src='shared/jqueryui/jquery-ui.min.js'))),
       divTag,
       tags$script('$(".draggable").draggable();')
     ))
@@ -97,8 +97,8 @@ fixedPanel <- function(...,
                        top = NULL, left = NULL, right = NULL, bottom = NULL,
                        width = NULL, height = NULL,
                        draggable = FALSE,
-                       cursor = c('move', 'default', 'inherit')) {
+                       cursor = c('auto', 'move', 'default', 'inherit')) {
   absolutePanel(..., top=top, left=left, right=right, bottom=bottom,
-                width=width, height=height, draggable=draggable, cursor=cursor,
+                width=width, height=height, draggable=draggable, cursor=match.arg(cursor),
                 fixed=TRUE)
 }

R/map.R

@@ -9,58 +9,68 @@
 # Remove of unknown key does nothing
 # Setting a key twice always results in last-one-wins
 # /TESTS
-Map <- setRefClass(
+Map <- R6Class(
   'Map',
-  fields = list(
-    .env = 'environment'
-  ),
-  methods = list(
+  portable = FALSE,
+  public = list(
     initialize = function() {
-      .env <<- new.env(parent=emptyenv())
+      private$env <- new.env(parent=emptyenv())
     },
     get = function(key) {
-      if (.self$containsKey(key))
-        base::get(key, pos=.env, inherits=FALSE)
+      env[[key]]
     },
     set = function(key, value) {
-      assign(key, value, pos=.env, inherits=FALSE)
+      env[[key]] <- value
       value
     },
+    mget = function(keys) {
+      base::mget(keys, env)
+    },
     mset = function(...) {
       args <- list(...)
-      for (key in names(args))
-        set(key, args[[key]])
+      if (length(args) == 0)
+        return()
+
+      arg_names <- names(args)
+      if (is.null(arg_names) || any(!nzchar(arg_names)))
+        stop("All elements must be named")
+
+      list2env(args, envir = env)
     },
     remove = function(key) {
-      if (.self$containsKey(key)) {
-        result <- .self$get(key)
-        rm(list = key, pos=.env, inherits=FALSE)
-        result
-      }
+      if (!self$containsKey(key))
+        return(NULL)
+
+      result <- env[[key]]
+      rm(list=key, envir=env, inherits=FALSE)
+      result
     },
     containsKey = function(key) {
-      exists(key, where=.env, inherits=FALSE)
+      exists(key, envir=env, inherits=FALSE)
     },
     keys = function() {
-      ls(envir=.env, all.names=TRUE)
+      # Sadly, this is much faster than ls(), because it doesn't sort the keys.
+      names(as.list(env, all.names=TRUE))
     },
     values = function() {
-      mget(.self$keys(), envir=.env, inherits=FALSE)
+      as.list(env, all.names=TRUE)
     },
     clear = function() {
-      .env <<- new.env(parent=emptyenv())
+      private$env <- new.env(parent=emptyenv())
       invisible(NULL)
     },
     size = function() {
-      length(.env)
+      length(env)
     }
+  ),
+
+  private = list(
+    env = 'environment'
   )
 )
 
 as.list.Map <- function(map) {
-  sapply(map$keys(),
-         map$get,
-         simplify=FALSE)
+  map$values()
 }
 length.Map <- function(map) {
   map$size()

R/middleware-shiny.R

@@ -5,13 +5,15 @@ reactLogHandler <- function(req) {
   if (!identical(req$PATH_INFO, '/reactlog'))
     return(NULL)
 
-  if (!getOption('shiny.reactlog', FALSE)) {
+  if (!isTRUE(getOption('shiny.reactlog'))) {
     return(NULL)
   }
 
+  sessionToken <- parseQueryString(req$QUERY_STRING)$s
+
   return(httpResponse(
     status=200,
-    content=list(file=renderReactLog(), owned=TRUE)
+    content=list(file=renderReactLog(sessionToken), owned=TRUE)
   ))
 }
 
@@ -35,37 +37,7 @@ sessionHandler <- function(req) {
   subreq$PATH_INFO <- subpath
   subreq$SCRIPT_NAME <- paste(subreq$SCRIPT_NAME, matches[[1]][2], sep='')
 
-  return(shinysession$handleRequest(subreq))
-}
-
-dynamicHandler <- function(filePath, dependencyFiles=filePath) {
-  lastKnownTimestamps <- NA
-  metaHandler <- function(req) NULL
-
-  if (!file.exists(filePath))
-    return(metaHandler)
-
-  cacheContext <- CacheContext$new()
-
-  return (function(req) {
-    # Check if we need to rebuild
-    if (cacheContext$isDirty()) {
-      cacheContext$reset()
-      for (dep in dependencyFiles)
-        cacheContext$addDependencyFile(dep)
-
-      clearClients()
-      if (file.exists(filePath)) {
-        local({
-          cacheContext$with(function() {
-            sys.source(filePath, envir=new.env(parent=globalenv()), keep.source=TRUE)
-          })
-        })
-      }
-      metaHandler <<- joinHandlers(.globals$clients)
-      clearClients()
-    }
-
-    return(metaHandler(req))
+  withReactiveDomain(shinysession, {
+    shinysession$handleRequest(subreq)
   })
 }

R/middleware.R

@@ -21,7 +21,7 @@ httpResponse <- function(status = 200,
   # Make sure it's a list, not a vector
   headers <- as.list(headers)
   if (is.null(headers$`X-UA-Compatible`))
-    headers$`X-UA-Compatible` <- "chrome=1"
+    headers$`X-UA-Compatible` <- "IE=edge,chrome=1"
   resp <- list(status = status, content_type = content_type, content = content,
                headers = headers)
   class(resp) <- 'httpResponse'
@@ -203,8 +203,7 @@ staticHandler <- function(root) {
     if (is.null(abs.path))
       return(NULL)
 
-    ext <- tools::file_ext(abs.path)
-    content.type <- getContentType(ext)
+    content.type <- getContentType(abs.path)
     response.content <- readBin(abs.path, 'raw', n=file.info(abs.path)$size)
     return(httpResponse(200, content.type, response.content))
   })
@@ -222,11 +221,12 @@ staticHandler <- function(root) {
 # return value of `createHttpuvApp` to httpuv's `startServer` function.
 #
 ## ------------------------------------------------------------------------
-HandlerList <- setRefClass("HandlerList",
-  fields = list(
-    handlers = "list"
-  ),
-  methods = list(
+HandlerList <- R6Class("HandlerList",
+  portable = FALSE,
+  class = FALSE,
+  public = list(
+    handlers = list(),
+
     add = function(handler, key, tail = FALSE) {
       if (!is.null(handlers[[key]]))
         stop("Key ", key, " already in use")
@@ -256,12 +256,18 @@ HandlerList <- setRefClass("HandlerList",
   )
 )
 
-HandlerManager <- setRefClass("HandlerManager",
-  fields = list(
+HandlerManager <- R6Class("HandlerManager",
+  portable = FALSE,
+  class = FALSE,
+  public = list(
     handlers = "HandlerList",
-    wsHandlers = "HandlerList"
-  ),
-  methods = list(
+    wsHandlers = "HandlerList",
+
+    initialize = function() {
+      handlers <<- HandlerList$new()
+      wsHandlers <<- HandlerList$new()
+    },
+
     addHandler = function(handler, key, tail = FALSE) {
       handlers$add(handler, key, tail)
     },
@@ -281,7 +287,7 @@ HandlerManager <- setRefClass("HandlerManager",
     createHttpuvApp = function() {
       list(
         onHeaders = function(req) {
-          maxSize <- getOption('shiny.maxRequestSize', 5 * 1024 * 1024)
+          maxSize <- getOption('shiny.maxRequestSize') %OR% (5 * 1024 * 1024)
           if (maxSize <= 0)
             return(NULL)
 
@@ -304,9 +310,9 @@ HandlerManager <- setRefClass("HandlerManager",
         },
         call = .httpServer(
           function (req) {
-            return(handlers$invoke(req))
+            withLogErrors(handlers$invoke(req))
           },
-          getOption('shiny.sharedSecret', NULL)
+          getOption('shiny.sharedSecret')
         ),
         onWSOpen = function(ws) {
           return(wsHandlers$invoke(ws))
@@ -314,7 +320,7 @@ HandlerManager <- setRefClass("HandlerManager",
       )
     },
     .httpServer = function(handler, sharedSecret) {
-      filter <- getOption('shiny.http.response.filter', NULL)
+      filter <- getOption('shiny.http.response.filter')
       if (is.null(filter))
         filter <- function(req, response) response
 
@@ -326,18 +332,39 @@ HandlerManager <- setRefClass("HandlerManager",
             headers=list('Content-Type' = 'text/html')))
         }
 
+        # Catch HEAD requests. For the purposes of handler functions, they
+        # should be treated like GET. The difference is that  they shouldn't
+        # return a body in the http response.
+        head_request <- FALSE
+        if (identical(req$REQUEST_METHOD, "HEAD")) {
+          head_request <- TRUE
+          req$REQUEST_METHOD <- "GET"
+        }
+
         response <- handler(req)
         if (is.null(response))
           response <- httpResponse(404, content="<h1>Not Found</h1>")
-        
+
         if (inherits(response, "httpResponse")) {
           headers <- as.list(response$headers)
           headers$'Content-Type' <- response$content_type
-  
+
           response <- filter(req, response)
-          return(list(status=response$status,
-            body=response$content,
-            headers=headers))
+          if (head_request) {
+            headers$`Content-Length` <- nchar(response$content, type = "bytes")
+            return(list(
+              status = response$status,
+              body = "",
+              headers = headers
+            ))
+          } else {
+            return(list(
+              status = response$status,
+              body = response$content,
+              headers = headers
+            ))
+          }
+
         } else {
           # Assume it's a Rook-compatible response
           return(response)

R/modules.R

@@ -0,0 +1,57 @@
+# Creates an object whose $ and $<- pass through to the parent
+# session, unless the name is matched in ..., in which case
+# that value is returned instead. (See Decorator pattern.)
+createSessionProxy <- function(parentSession, ...) {
+  e <- new.env(parent = emptyenv())
+  e$parent <- parentSession
+  e$overrides <- list(...)
+
+  structure(
+    e,
+    class = "session_proxy"
+  )
+}
+
+#' @export
+`$.session_proxy` <- function(x, name) {
+  if (name %in% names(x[["overrides"]]))
+    x[["overrides"]][[name]]
+  else
+    x[["parent"]][[name]]
+}
+
+#' @export
+`$<-.session_proxy` <- function(x, name, value) {
+  x[["parent"]][[name]] <- value
+  x
+}
+
+#' Invoke a Shiny module
+#'
+#' Shiny's module feature lets you break complicated UI and server logic into
+#' smaller, self-contained pieces. Compared to large monolithic Shiny apps,
+#' modules are easier to reuse and easier to reason about. See the article at
+#' \url{http://shiny.rstudio.com/articles/modules.html} to learn more.
+#'
+#' @param module A Shiny module server function
+#' @param id An ID string that corresponds with the ID used to call the module's
+#'   UI function
+#' @param ... Additional parameters to pass to module server function
+#' @param session Session from which to make a child scope (the default should
+#'   almost always be used)
+#'
+#' @return The return value, if any, from executing the module server function
+#' @seealso \url{http://shiny.rstudio.com/articles/modules.html}
+#'
+#' @export
+callModule <- function(module, id, ..., session = getDefaultReactiveDomain()) {
+  childScope <- session$makeScope(id)
+
+  withReactiveDomain(childScope, {
+    if (!is.function(module)) {
+      stop("module argument must be a function")
+    }
+
+    module(childScope$input, childScope$output, childScope, ...)
+  })
+}

R/notifications.R

@@ -0,0 +1,96 @@
+#' Show or remove a notification
+#'
+#' These functions show and remove notifications in a Shiny application.
+#'
+#' @param ui Content of message.
+#' @param duration Number of seconds to display the message before it
+#'   disappears. Use \code{NULL} to make the message not automatically
+#'   disappear.
+#' @param closeButton If \code{TRUE}, display a button which will make the
+#'   notification disappear when clicked. If \code{FALSE} do not display.
+#' @param id An ID string. This can be used to change the contents of an
+#'   existing message with \code{showNotification}, or to remove it with
+#'   \code{removeNotification}. If not provided, one will be generated
+#'   automatically. If an ID is provided and there does not currently exist a
+#'   notification with that ID, a new notification will be created with that ID.
+#' @param type A string which controls the color of the notification. One of
+#'   "default" (gray), "message" (blue), "warning" (yellow), or "error" (red).
+#' @param session Session object to send notification to.
+#'
+#' @return An ID for the notification.
+#'
+#' @examples
+#' if (interactive()) {
+#' # Show a message when button is clicked
+#' shinyApp(
+#'   ui = fluidPage(
+#'     actionButton("show", "Show")
+#'   ),
+#'   server = function(input, output) {
+#'     observeEvent(input$show, {
+#'       showNotification("Message text")
+#'     })
+#'   }
+#' )
+#'
+#' # App with show and remove buttons
+#' shinyApp(
+#'   ui = fluidPage(
+#'     actionButton("show", "Show"),
+#'     actionButton("remove", "Remove")
+#'   ),
+#'   server = function(input, output) {
+#'     # A queue of notification IDs
+#'     ids <- character(0)
+#'     # A counter
+#'     n <- 0
+#'
+#'     observeEvent(input$show, {
+#'       # Save the ID for removal later
+#'       id <- showNotification(paste("Message", n), duration = NULL)
+#'       ids <<- c(ids, id)
+#'       n <<- n + 1
+#'     })
+#'
+#'     observeEvent(input$remove, {
+#'       if (length(ids) > 0)
+#'         removeNotification(ids[1])
+#'       ids <<- ids[-1]
+#'     })
+#'   }
+#' )
+#' }
+#' @export
+showNotification <- function(ui, duration = 5, closeButton = TRUE,
+  id = NULL, type = c("default", "message", "warning", "error"),
+  session = getDefaultReactiveDomain())
+{
+
+  if (is.null(id))
+    id <- randomID()
+
+  res <- processDeps(ui, session)
+
+  session$sendNotification("show",
+    list(
+      html = res$html,
+      deps = res$deps,
+      duration = if (!is.null(duration)) duration * 1000,
+      closeButton = closeButton,
+      id = id,
+      type = match.arg(type)
+    )
+  )
+
+  id
+}
+
+#' @rdname showNotification
+#' @export
+removeNotification <- function(id = NULL, session = getDefaultReactiveDomain()) {
+  if (is.null(id)) {
+    stop("id is required.")
+  }
+  session$sendNotification("remove", id)
+  id
+}

R/priorityqueue.R

@@ -4,15 +4,19 @@
 # elements have the same priority, they are served according to their order in
 # the queue." (http://en.wikipedia.org/wiki/Priority_queue)
 
-PriorityQueue <- setRefClass(
+PriorityQueue <- R6Class(
   'PriorityQueue',
-  fields = list(
+  portable = FALSE,
+  class = FALSE,
+  public = list(
     # Keys are priorities, values are subqueues (implemented as list)
     .itemsByPriority = 'Map',
     # Sorted vector (largest first)
-    .priorities = 'numeric'
-  ),
-  methods = list(
+    .priorities = numeric(0),
+
+    initialize = function() {
+      .itemsByPriority <<- Map$new()
+    },
     # Enqueue an item, with the given priority level (must be integer). Higher
     # priority numbers are dequeued earlier than lower.
     enqueue = function(item, priority) {

R/progress.R

@@ -0,0 +1,283 @@
+#' Reporting progress (object-oriented API)
+#'
+#' Reports progress to the user during long-running operations.
+#'
+#' This package exposes two distinct programming APIs for working with
+#' progress. \code{\link{withProgress}} and \code{\link{setProgress}}
+#' together provide a simple function-based interface, while the
+#' \code{Progress} reference class provides an object-oriented API.
+#'
+#' Instantiating a \code{Progress} object causes a progress panel to be
+#' created, and it will be displayed the first time the \code{set}
+#' method is called. Calling \code{close} will cause the progress panel
+#' to be removed.
+#'
+#' \strong{Methods}
+#'   \describe{
+#'     \item{\code{initialize(session, min = 0, max = 1)}}{
+#'       Creates a new progress panel (but does not display it).
+#'     }
+#'     \item{\code{set(value = NULL, message = NULL, detail = NULL)}}{
+#'       Updates the progress panel. When called the first time, the
+#'       progress panel is displayed.
+#'     }
+#'     \item{\code{inc(amount = 0.1, message = NULL, detail = NULL)}}{
+#'       Like \code{set}, this updates the progress panel. The difference is
+#'       that \code{inc} increases the progress bar by \code{amount}, instead
+#'       of setting it to a specific value.
+#'     }
+#'     \item{\code{close()}}{
+#'       Removes the progress panel. Future calls to \code{set} and
+#'       \code{close} will be ignored.
+#'     }
+#'   }
+#'
+#' @param session The Shiny session object, as provided by
+#'   \code{shinyServer} to the server function.
+#' @param min The value that represents the starting point of the
+#'   progress bar. Must be less tham \code{max}.
+#' @param max The value that represents the end of the progress bar.
+#'   Must be greater than \code{min}.
+#' @param message A single-element character vector; the message to be
+#'   displayed to the user, or \code{NULL} to hide the current message
+#'   (if any).
+#' @param detail A single-element character vector; the detail message
+#'   to be displayed to the user, or \code{NULL} to hide the current
+#'   detail message (if any). The detail message will be shown with a
+#'   de-emphasized appearance relative to \code{message}.
+#' @param value A numeric value at which to set
+#'   the progress bar, relative to \code{min} and \code{max}.
+#'   \code{NULL} hides the progress bar, if it is currently visible.
+#' @param amount Single-element numeric vector; the value at which to set
+#'   the progress bar, relative to \code{min} and \code{max}.
+#'   \code{NULL} hides the progress bar, if it is currently visible.
+#' @param amount For the \code{inc()} method, a numeric value to increment the
+#'   progress bar.
+#'
+#' @examples
+#' \dontrun{
+#' # server.R
+#' shinyServer(function(input, output, session) {
+#'   output$plot <- renderPlot({
+#'     progress <- shiny::Progress$new(session, min=1, max=15)
+#'     on.exit(progress$close())
+#'
+#'     progress$set(message = 'Calculation in progress',
+#'                  detail = 'This may take a while...')
+#'
+#'     for (i in 1:15) {
+#'       progress$set(value = i)
+#'       Sys.sleep(0.5)
+#'     }
+#'     plot(cars)
+#'   })
+#' })
+#' }
+#' @seealso \code{\link{withProgress}}
+#' @format NULL
+#' @usage NULL
+#' @export
+Progress <- R6Class(
+  'Progress',
+  portable = TRUE,
+  public = list(
+
+    initialize = function(session = getDefaultReactiveDomain(), min = 0, max = 1) {
+      if (is.null(session$progressStack))
+        stop("'session' is not a ShinySession object.")
+
+      private$session <- session
+      private$id <- randomID()
+      private$min <- min
+      private$max <- max
+      private$value <- NULL
+      private$closed <- FALSE
+
+      session$sendProgress('open', list(id = private$id))
+    },
+
+    set = function(value = NULL, message = NULL, detail = NULL) {
+      if (private$closed) {
+        warning("Attempting to set progress, but progress already closed.")
+        return()
+      }
+
+      if (is.null(value) || is.na(value)) {
+        value <- NULL
+      } else {
+        # Normalize value to number between 0 and 1
+        value <- min(1, max(0, (value - private$min) / (private$max - private$min)))
+      }
+
+      private$value <- value
+
+      data <- dropNulls(list(
+        id = private$id,
+        message = message,
+        detail = detail,
+        value = value
+      ))
+
+       private$session$sendProgress('update', data)
+    },
+
+    inc = function(amount = 0.1, message = NULL, detail = NULL) {
+      value <- min(self$getValue() + amount, private$max)
+      self$set(value, message, detail)
+    },
+
+    getMin = function() private$min,
+
+    getMax = function() private$max,
+
+    # Return value (not the normalized 0-1 value, but in the original range)
+    getValue = function() {
+      private$value * (private$max - private$min) + private$min
+    },
+
+    close = function() {
+      if (private$closed) {
+        warning("Attempting to close progress, but progress already closed.")
+        return()
+      }
+
+      private$session$sendProgress('close', list(id = private$id))
+      private$closed <- TRUE
+    }
+  ),
+
+  private = list(
+    session = 'environment',
+    id = character(0),
+    min = numeric(0),
+    max = numeric(0),
+    value = NULL,
+    closed = logical(0)
+  )
+)
+
+#' Reporting progress (functional API)
+#'
+#' Reports progress to the user during long-running operations.
+#'
+#' This package exposes two distinct programming APIs for working with progress.
+#' Using \code{withProgress} with \code{incProgress} or \code{setProgress}
+#' provide a simple function-based interface, while the \code{\link{Progress}}
+#' reference class provides an object-oriented API.
+#'
+#' Use \code{withProgress} to wrap the scope of your work; doing so will cause a
+#' new progress panel to be created, and it will be displayed the first time
+#' \code{incProgress} or \code{setProgress} are called. When \code{withProgress}
+#' exits, the corresponding progress panel will be removed.
+#'
+#' The \code{incProgress} function increments the status bar by a specified
+#' amount, whereas the \code{setProgress} function sets it to a specific value,
+#' and can also set the text displayed.
+#'
+#' Generally, \code{withProgress}/\code{incProgress}/\code{setProgress} should
+#' be sufficient; the exception is if the work to be done is asynchronous (this
+#' is not common) or otherwise cannot be encapsulated by a single scope. In that
+#' case, you can use the \code{Progress} reference class.
+#'
+#' @param session The Shiny session object, as provided by \code{shinyServer} to
+#'   the server function. The default is to automatically find the session by
+#'   using the current reactive domain.
+#' @param expr The work to be done. This expression should contain calls to
+#'   \code{setProgress}.
+#' @param min The value that represents the starting point of the progress bar.
+#'   Must be less tham \code{max}. Default is 0.
+#' @param max The value that represents the end of the progress bar. Must be
+#'   greater than \code{min}. Default is 1.
+#' @param amount For \code{incProgress}, the amount to increment the status bar.
+#'   Default is 0.1.
+#' @param env The environment in which \code{expr} should be evaluated.
+#' @param quoted Whether \code{expr} is a quoted expression (this is not
+#'   common).
+#' @param message A single-element character vector; the message to be displayed
+#'   to the user, or \code{NULL} to hide the current message (if any).
+#' @param detail A single-element character vector; the detail message to be
+#'   displayed to the user, or \code{NULL} to hide the current detail message
+#'   (if any). The detail message will be shown with a de-emphasized appearance
+#'   relative to \code{message}.
+#' @param value Single-element numeric vector; the value at which to set the
+#'   progress bar, relative to \code{min} and \code{max}. \code{NULL} hides the
+#'   progress bar, if it is currently visible.
+#'
+#' @examples
+#' \dontrun{
+#' # server.R
+#' shinyServer(function(input, output) {
+#'   output$plot <- renderPlot({
+#'     withProgress(message = 'Calculation in progress',
+#'                  detail = 'This may take a while...', value = 0, {
+#'       for (i in 1:15) {
+#'         incProgress(1/15)
+#'         Sys.sleep(0.25)
+#'       }
+#'     })
+#'     plot(cars)
+#'   })
+#' })
+#' }
+#' @seealso \code{\link{Progress}}
+#' @rdname withProgress
+#' @export
+withProgress <- function(expr, min = 0, max = 1,
+                         value = min + (max - min) * 0.1,
+                         message = NULL, detail = NULL,
+                         session = getDefaultReactiveDomain(),
+                         env = parent.frame(), quoted = FALSE) {
+
+  if (!quoted)
+    expr <- substitute(expr)
+
+  if (is.null(session$progressStack))
+    stop("'session' is not a ShinySession object.")
+
+  p <- Progress$new(session, min = min, max = max)
+
+  session$progressStack$push(p)
+  on.exit({
+    session$progressStack$pop()
+    p$close()
+  })
+
+  p$set(value, message, detail)
+
+  eval(expr, env)
+}
+
+#' @rdname withProgress
+#' @export
+setProgress <- function(value = NULL, message = NULL, detail = NULL,
+                        session = getDefaultReactiveDomain()) {
+
+  if (is.null(session$progressStack))
+    stop("'session' is not a ShinySession object.")
+
+  if (session$progressStack$size() == 0) {
+    warning('setProgress was called outside of withProgress; ignoring')
+    return()
+  }
+
+  session$progressStack$peek()$set(value, message, detail)
+  invisible()
+}
+
+#' @rdname withProgress
+#' @export
+incProgress <- function(amount = 0.1, message = NULL, detail = NULL,
+                        session = getDefaultReactiveDomain()) {
+
+  if (is.null(session$progressStack))
+    stop("'session' is not a ShinySession object.")
+
+  if (session$progressStack$size() == 0) {
+    warning('incProgress was called outside of withProgress; ignoring')
+    return()
+  }
+
+  p <- session$progressStack$peek()
+  p$inc(amount, message, detail)
+  invisible()
+}

R/react.R

@@ -1,19 +1,17 @@
-Context <- setRefClass(
+Context <- R6Class(
   'Context',
-  fields = list(
-    id = 'character',
-    .label = 'character',      # For debug purposes
-    .invalidated = 'logical',
-    .invalidateCallbacks = 'list',
-    .flushCallbacks = 'list',
-    .domain = 'ANY'
-  ),
-  methods = list(
+  portable = FALSE,
+  class = FALSE,
+  public = list(
+    id = character(0),
+    .label = character(0),      # For debug purposes
+    .invalidated = FALSE,
+    .invalidateCallbacks = list(),
+    .flushCallbacks = list(),
+    .domain = NULL,
+
     initialize = function(domain, label='', type='other', prevId='') {
       id <<- .getReactiveEnvironment()$nextId()
-      .invalidated <<- FALSE
-      .invalidateCallbacks <<- list()
-      .flushCallbacks <<- list()
       .label <<- label
       .domain <<- domain
       .graphCreateContext(id, label, type, prevId, domain)
@@ -23,10 +21,8 @@ Context <- setRefClass(
       withReactiveDomain(.domain, {
         env <- .getReactiveEnvironment()
         .graphEnterContext(id)
-        tryCatch(
-          env$runWith(.self, func),
-          finally = .graphExitContext(id)
-        )
+        on.exit(.graphExitContext(id), add = TRUE)
+        env$runWith(self, func)
       })
     },
     invalidate = function() {
@@ -56,7 +52,10 @@ Context <- setRefClass(
     addPendingFlush = function(priority) {
       "Tell the reactive environment that this context should be flushed the
         next time flushReact() called."
-      .getReactiveEnvironment()$addPendingFlush(.self, priority)
+      if (!is.null(.domain)) {
+        .domain$incrementBusyCount()
+      }
+      .getReactiveEnvironment()$addPendingFlush(self, priority)
     },
     onFlush = function(func) {
       "Register a function to be called when this context is flushed."
@@ -64,33 +63,32 @@ Context <- setRefClass(
     },
     executeFlushCallbacks = function() {
       "For internal use only."
-      lapply(.flushCallbacks, function(func) {
-        withCallingHandlers({
-          func()
-        }, warning = function(e) {
-          # TODO: Callbacks in app
-        }, error = function(e) {
-          # TODO: Callbacks in app
-        })
+
+      on.exit({
+        if (!is.null(.domain)) {
+          .domain$decrementBusyCount()
+        }
+      }, add = TRUE)
+
+      lapply(.flushCallbacks, function(flushCallback) {
+        flushCallback()
       })
     }
   )
 )
 
-ReactiveEnvironment <- setRefClass(
+ReactiveEnvironment <- R6Class(
   'ReactiveEnvironment',
-  fields = list(
-    .currentContext = 'ANY',
-    .nextId = 'integer',
+  portable = FALSE,
+  class = FALSE,
+  public = list(
+    .currentContext = NULL,
+    .nextId = 0L,
     .pendingFlush = 'PriorityQueue',
-    .inFlush = 'logical'
-  ),
-  methods = list(
+    .inFlush = FALSE,
+
     initialize = function() {
-      .currentContext <<- NULL
-      .nextId <<- 0L
       .pendingFlush <<- PriorityQueue$new()
-      .inFlush <<- FALSE
     },
     nextId = function() {
       .nextId <<- .nextId + 1L
@@ -98,7 +96,7 @@ ReactiveEnvironment <- setRefClass(
     },
     currentContext = function() {
       if (is.null(.currentContext)) {
-        if (isTRUE(getOption('shiny.suppressMissingContextError', FALSE))) {
+        if (isTRUE(getOption('shiny.suppressMissingContextError'))) {
           return(getDummyContext())
         } else {
           stop('Operation not allowed without an active reactive context. ',
@@ -108,11 +106,11 @@ ReactiveEnvironment <- setRefClass(
       }
       return(.currentContext)
     },
-    runWith = function(ctx, func) {
+    runWith = function(ctx, contextFunc) {
       old.ctx <- .currentContext
       .currentContext <<- ctx
       on.exit(.currentContext <<- old.ctx)
-      shinyCallingHandlers(func())
+      contextFunc()
     },
     addPendingFlush = function(ctx, priority) {
       .pendingFlush$enqueue(ctx, priority)
@@ -138,7 +136,7 @@ ReactiveEnvironment <- setRefClass(
       reactiveEnvironment <<- ReactiveEnvironment$new()
     return(reactiveEnvironment)
   }
-}) 
+})
 
 # Causes any pending invalidations to run.
 flushReact <- function() {

R/reactive-domains.R

@@ -59,6 +59,8 @@ createMockDomain <- function() {
     }
     invisible()
   }
+  domain$incrementBusyCount <- function() NULL
+  domain$decrementBusyCount <- function() NULL
   return(domain)
 }
 
@@ -75,6 +77,7 @@ createMockDomain <- function() {
 #
 ## ------------------------------------------------------------------------
 
+#' @name domains
 #' @rdname domains
 #' @export
 getDefaultReactiveDomain <- function() {

R/reactives.R

@@ -1,12 +1,16 @@
 #' @include utils.R
 NULL
 
-Dependents <- setRefClass(
+Dependents <- R6Class(
   'Dependents',
-  fields = list(
-    .dependents = 'Map'
-  ),
-  methods = list(
+  portable = FALSE,
+  class = FALSE,
+  public = list(
+    .dependents = 'Map',
+
+    initialize = function() {
+      .dependents <<- Map$new()
+    },
     register = function(depId=NULL, depLabel=NULL) {
       ctx <- .getReactiveEnvironment()$currentContext()
       if (!.dependents$containsKey(ctx$id)) {
@@ -36,11 +40,12 @@ Dependents <- setRefClass(
 
 # ReactiveValues ------------------------------------------------------------
 
-ReactiveValues <- setRefClass(
+ReactiveValues <- R6Class(
   'ReactiveValues',
-  fields = list(
+  portable = FALSE,
+  public = list(
     # For debug purposes
-    .label = 'character',
+    .label = character(0),
     .values = 'environment',
     .dependents = 'environment',
     # Dependents for the list of all names, including hidden
@@ -48,15 +53,17 @@ ReactiveValues <- setRefClass(
     # Dependents for all values, including hidden
     .allValuesDeps = 'Dependents',
     # Dependents for all values
-    .valuesDeps = 'Dependents'
-  ),
-  methods = list(
+    .valuesDeps = 'Dependents',
+
     initialize = function() {
       .label <<- paste('reactiveValues',
                        p_randomInt(1000, 10000),
                        sep="")
       .values <<- new.env(parent=emptyenv())
       .dependents <<- new.env(parent=emptyenv())
+      .namesDeps <<- Dependents$new()
+      .allValuesDeps <<- Dependents$new()
+      .valuesDeps <<- Dependents$new()
     },
     get = function(key) {
       ctx <- .getReactiveEnvironment()$currentContext()
@@ -114,7 +121,7 @@ ReactiveValues <- setRefClass(
     mset = function(lst) {
       lapply(base::names(lst),
              function(name) {
-               .self$set(name, lst[[name]])
+               self$set(name, lst[[name]])
              })
     },
     names = function() {
@@ -145,11 +152,12 @@ ReactiveValues <- setRefClass(
 
 #' Create an object for storing reactive values
 #'
-#' This function returns an object for storing reactive values. It is similar
-#' to a list, but with special capabilities for reactive programming. When you
-#' read a value from it, the calling reactive expression takes a reactive
-#' dependency on that value, and when you write to it, it notifies any reactive
-#' functions that depend on that value.
+#' This function returns an object for storing reactive values. It is similar to
+#' a list, but with special capabilities for reactive programming. When you read
+#' a value from it, the calling reactive expression takes a reactive dependency
+#' on that value, and when you write to it, it notifies any reactive functions
+#' that depend on that value. Note that values taken from the reactiveValues
+#' object are reactive, but the reactiveValues object itself is not.
 #'
 #' @examples
 #' # Create the object with no values
@@ -192,15 +200,28 @@ reactiveValues <- function(...) {
   values
 }
 
-# Register the S3 class so that it can be used for a field in a Reference Class
-setOldClass("reactivevalues")
+checkName <- function(x) {
+  if (!is.character(x) || length(x) != 1) {
+    stop("Must use single string to index into reactivevalues")
+  }
+}
 
 # Create a reactivevalues object
 #
 # @param values A ReactiveValues object
 # @param readonly Should this object be read-only?
-.createReactiveValues <- function(values = NULL, readonly = FALSE) {
-  structure(list(impl=values), class='reactivevalues', readonly=readonly)
+# @param ns A namespace function (either `identity` or `NS(namespace)`)
+.createReactiveValues <- function(values = NULL, readonly = FALSE,
+  ns = identity) {
+
+  structure(
+    list(
+      impl = values,
+      readonly = readonly,
+      ns = ns
+    ),
+    class='reactivevalues'
+  )
 }
 
 #' Checks whether an object is a reactivevalues object
@@ -214,7 +235,8 @@ is.reactivevalues <- function(x) inherits(x, 'reactivevalues')
 
 #' @export
 `$.reactivevalues` <- function(x, name) {
-  .subset2(x, 'impl')$get(name)
+  checkName(name)
+  .subset2(x, 'impl')$get(.subset2(x, 'ns')(name))
 }
 
 #' @export
@@ -222,14 +244,12 @@ is.reactivevalues <- function(x) inherits(x, 'reactivevalues')
 
 #' @export
 `$<-.reactivevalues` <- function(x, name, value) {
-  if (attr(x, 'readonly')) {
+  if (.subset2(x, 'readonly')) {
     stop("Attempted to assign value to a read-only reactivevalues object")
-  } else if (length(name) != 1 || !is.character(name)) {
-    stop("Must use single string to index into reactivevalues")
-  } else {
-    .subset2(x, 'impl')$set(name, value)
-    x
   }
+  checkName(name)
+  .subset2(x, 'impl')$set(.subset2(x, 'ns')(name), value)
+  x
 }
 
 #' @export
@@ -247,7 +267,13 @@ is.reactivevalues <- function(x) inherits(x, 'reactivevalues')
 
 #' @export
 names.reactivevalues <- function(x) {
-  .subset2(x, 'impl')$names()
+  prefix <- .subset2(x, 'ns')("")
+  results <- .subset2(x, 'impl')$names()
+  if (nzchar(prefix)) {
+    results <- results[substring(results, 1, nchar(prefix)) == prefix]
+    results <- substring(results, nchar(prefix) + 1)
+  }
+  results
 }
 
 #' @export
@@ -302,40 +328,45 @@ reactiveValuesToList <- function(x, all.names=FALSE) {
 # x[['impl']].
 #' @export
 str.reactivevalues <- function(object, indent.str = " ", ...) {
-  str(unclass(object), indent.str = indent.str, ...)
+  utils::str(unclass(object), indent.str = indent.str, ...)
   # Need to manually print out the class field,
   cat(indent.str, '- attr(*, "class")=', sep = "")
-  str(class(object))
+  utils::str(class(object))
 }
 
 # Observable ----------------------------------------------------------------
 
-Observable <- setRefClass(
+Observable <- R6Class(
   'Observable',
-  fields = list(
+  portable = FALSE,
+  public = list(
     .func = 'function',
-    .label = 'character',
-    .domain = 'ANY',
+    .label = character(0),
+    .domain = NULL,
     .dependents = 'Dependents',
-    .invalidated = 'logical',
-    .running = 'logical',
-    .value = 'ANY',
-    .visible = 'logical',
-    .execCount = 'integer',
-    .mostRecentCtxId = 'character'
-  ),
-  methods = list(
+    .invalidated = logical(0),
+    .running = logical(0),
+    .value = NULL,
+    .error = FALSE,
+    .visible = logical(0),
+    .execCount = integer(0),
+    .mostRecentCtxId = character(0),
+
     initialize = function(func, label = deparse(substitute(func)),
-                          domain = getDefaultReactiveDomain()) {
+                          domain = getDefaultReactiveDomain(),
+                          ..stacktraceon = TRUE) {
       if (length(formals(func)) > 0)
         stop("Can't make a reactive expression from a function that takes one ",
              "or more parameters; only functions without parameters can be ",
              "reactive.")
-      .func <<- func
-      .invalidated <<- TRUE
-      .running <<- FALSE
+
+      .func <<- wrapFunctionLabel(func, paste("reactive", label),
+        ..stacktraceon = ..stacktraceon)
       .label <<- label
       .domain <<- domain
+      .dependents <<- Dependents$new()
+      .invalidated <<- TRUE
+      .running <<- FALSE
       .execCount <<- 0L
       .mostRecentCtxId <<- ""
     },
@@ -343,13 +374,16 @@ Observable <- setRefClass(
       .dependents$register()
 
       if (.invalidated || .running) {
-        .self$.updateValue()
+        ..stacktraceoff..(
+          self$.updateValue()
+        )
       }
 
       .graphDependsOnId(getCurrentContext()$id, .mostRecentCtxId)
 
-      if (identical(class(.value), 'try-error'))
-        stop(attr(.value, 'condition'))
+      if (.error) {
+        stop(.value)
+      }
 
       if (.visible)
         .value
@@ -373,9 +407,36 @@ Observable <- setRefClass(
       on.exit(.running <<- wasRunning)
 
       ctx$run(function() {
-        result <- withVisible(try(shinyCallingHandlers(.func()), silent=TRUE))
-        .visible <<- result$visible
+        result <- withCallingHandlers(
+
+          {
+            .error <<- FALSE
+            withVisible(.func())
+          },
+
+          error = function(cond) {
+            # If an error occurs, we want to propagate the error, but we also
+            # want to save a copy of it, so future callers of this reactive will
+            # get the same error (i.e. the error is cached).
+
+            # We stripStackTrace in the next line, just in case someone
+            # downstream of us (i.e. deeper into the call stack) used
+            # captureStackTraces; otherwise the entire stack would always be the
+            # same (i.e. you'd always see the whole stack trace of the *first*
+            # time the code was run and the condition raised; there'd be no way
+            # to see the stack trace of the call site that caused the cached
+            # exception to be re-raised, and you need that information to figure
+            # out what's triggering the re-raise).
+            #
+            # We use try(stop()) as an easy way to generate a try-error object
+            # out of this condition.
+            .value <<- cond
+            .error <<- TRUE
+            .visible <<- FALSE
+          }
+        )
         .value <<- result$value
+        .visible <<- result$visible
       })
     }
   )
@@ -386,27 +447,29 @@ Observable <- setRefClass(
 #' Wraps a normal expression to create a reactive expression. Conceptually, a
 #' reactive expression is a expression whose result will change over time.
 #'
-#' Reactive expressions are expressions that can read reactive values and call other
-#' reactive expressions. Whenever a reactive value changes, any reactive expressions
-#' that depended on it are marked as "invalidated" and will automatically
-#' re-execute if necessary. If a reactive expression is marked as invalidated, any
-#' other reactive expressions that recently called it are also marked as
-#' invalidated. In this way, invalidations ripple through the expressions that
-#' depend on each other.
+#' Reactive expressions are expressions that can read reactive values and call
+#' other reactive expressions. Whenever a reactive value changes, any reactive
+#' expressions that depended on it are marked as "invalidated" and will
+#' automatically re-execute if necessary. If a reactive expression is marked as
+#' invalidated, any other reactive expressions that recently called it are also
+#' marked as invalidated. In this way, invalidations ripple through the
+#' expressions that depend on each other.
 #'
 #' See the \href{http://rstudio.github.com/shiny/tutorial/}{Shiny tutorial} for
 #' more information about reactive expressions.
 #'
 #' @param x For \code{reactive}, an expression (quoted or unquoted). For
 #'   \code{is.reactive}, an object to test.
-#' @param env The parent environment for the reactive expression. By default, this
-#'   is the calling environment, the same as when defining an ordinary
+#' @param env The parent environment for the reactive expression. By default,
+#'   this is the calling environment, the same as when defining an ordinary
 #'   non-reactive expression.
 #' @param quoted Is the expression quoted? By default, this is \code{FALSE}.
 #'   This is useful when you want to use an expression that is stored in a
-#'   variable; to do so, it must be quoted with `quote()`.
+#'   variable; to do so, it must be quoted with \code{quote()}.
 #' @param label A label for the reactive expression, useful for debugging.
 #' @param domain See \link{domains}.
+#' @param ..stacktraceon Advanced use only. For stack manipulation purposes; see
+#'   \code{\link{stacktrace}}.
 #' @return a function, wrapped in a S3 class "reactive"
 #'
 #' @examples
@@ -430,17 +493,62 @@ Observable <- setRefClass(
 #'
 #' @export
 reactive <- function(x, env = parent.frame(), quoted = FALSE, label = NULL,
-                     domain = getDefaultReactiveDomain()) {
+                     domain = getDefaultReactiveDomain(),
+                     ..stacktraceon = TRUE) {
   fun <- exprToFunction(x, env, quoted)
   # Attach a label and a reference to the original user source for debugging
-  if (is.null(label))
-    label <- sprintf('reactive(%s)', paste(deparse(body(fun)), collapse='\n'))
-  srcref <- attr(substitute(x), "srcref")
+  srcref <- attr(substitute(x), "srcref", exact = TRUE)
+  if (is.null(label)) {
+    label <- srcrefToLabel(srcref[[1]],
+      sprintf('reactive(%s)', paste(deparse(body(fun)), collapse='\n')))
+  }
   if (length(srcref) >= 2) attr(label, "srcref") <- srcref[[2]]
   attr(label, "srcfile") <- srcFileOfRef(srcref[[1]])
-  o <- Observable$new(fun, label, domain)
-  registerDebugHook(".func", o, "Reactive")
-  structure(o$getValue@.Data, observable = o, class = "reactive")
+  o <- Observable$new(fun, label, domain, ..stacktraceon = ..stacktraceon)
+  structure(o$getValue, observable = o, class = "reactive")
+}
+
+# Given the srcref to a reactive expression, attempts to figure out what the
+# name of the reactive expression is. This isn't foolproof, as it literally
+# scans the line of code that started the reactive block and looks for something
+# that looks like assignment. If we fail, fall back to a default value (likely
+# the block of code in the body of the reactive).
+srcrefToLabel <- function(srcref, defaultLabel) {
+  if (is.null(srcref))
+    return(defaultLabel)
+
+  srcfile <- attr(srcref, "srcfile", exact = TRUE)
+  if (is.null(srcfile))
+    return(defaultLabel)
+
+  if (is.null(srcfile$lines))
+    return(defaultLabel)
+
+  lines <- srcfile$lines
+  # When pasting at the Console, srcfile$lines is not split
+  if (length(lines) == 1) {
+    lines <- strsplit(lines, "\n")[[1]]
+  }
+
+  if (length(lines) < srcref[1]) {
+    return(defaultLabel)
+  }
+
+  firstLine <- substring(lines[srcref[1]], 1, srcref[2] - 1)
+
+  m <- regexec("(.*)(<-|=)\\s*reactive\\s*\\($", firstLine)
+  if (m[[1]][1] == -1) {
+    return(defaultLabel)
+  }
+  sym <- regmatches(firstLine, m)[[1]][2]
+  res <- try(parse(text = sym), silent = TRUE)
+  if (inherits(res, "try-error"))
+    return(defaultLabel)
+
+  if (length(res) != 1)
+    return(defaultLabel)
+
+  return(as.character(res))
 }
 
 #' @export
@@ -455,8 +563,8 @@ is.reactive <- function(x) inherits(x, "reactive")
 
 # Return the number of times that a reactive expression or observer has been run
 execCount <- function(x) {
-  if (is.function(x))
-    return(environment(x)$.execCount)
+  if (is.reactive(x))
+    return(attr(x, "observable")$.execCount)
   else if (inherits(x, 'Observer'))
     return(x$.execCount)
   else
@@ -465,30 +573,41 @@ execCount <- function(x) {
 
 # Observer ------------------------------------------------------------------
 
-Observer <- setRefClass(
+Observer <- R6Class(
   'Observer',
-  fields = list(
+  portable = FALSE,
+  public = list(
     .func = 'function',
-    .label = 'character',
+    .label = character(0),
     .domain = 'ANY',
-    .priority = 'numeric',
-    .autoDestroy = 'logical',
-    .invalidateCallbacks = 'list',
-    .execCount = 'integer',
+    .priority = numeric(0),
+    .autoDestroy = logical(0),
+    .invalidateCallbacks = list(),
+    .execCount = integer(0),
     .onResume = 'function',
-    .suspended = 'logical',
-    .destroyed = 'logical',
-    .prevId = 'character'
-  ),
-  methods = list(
-    initialize = function(func, label, suspended = FALSE, priority = 0,
+    .suspended = logical(0),
+    .destroyed = logical(0),
+    .prevId = character(0),
+
+    initialize = function(observerFunc, label, suspended = FALSE, priority = 0,
                           domain = getDefaultReactiveDomain(),
-                          autoDestroy = TRUE) {
-      if (length(formals(func)) > 0)
+                          autoDestroy = TRUE, ..stacktraceon = TRUE) {
+      if (length(formals(observerFunc)) > 0)
         stop("Can't make an observer from a function that takes parameters; ",
              "only functions without parameters can be reactive.")
-
-      .func <<- func
+registerDebugHook("observerFunc", environment(), label)
+      .func <<- function() {
+        tryCatch(
+          if (..stacktraceon)
+            ..stacktraceon..(observerFunc())
+          else
+            observerFunc(),
+          validation = function(e) {
+            # It's OK for a validation error to cause an observer to stop
+            # running
+          }
+        )
+      }
       .label <<- label
       .domain <<- domain
       .autoDestroy <<- autoDestroy
@@ -499,7 +618,7 @@ Observer <- setRefClass(
       .destroyed <<- FALSE
       .prevId <<- ''
 
-      onReactiveDomainEnded(.domain, .self$.onDomainEnded)
+      onReactiveDomainEnded(.domain, self$.onDomainEnded)
 
       # Defer the first running of this until flushReact is called
       .createContext()$invalidate()
@@ -509,8 +628,8 @@ Observer <- setRefClass(
       .prevId <<- ctx$id
 
       ctx$onInvalidate(function() {
-        lapply(.invalidateCallbacks, function(func) {
-          func()
+        lapply(.invalidateCallbacks, function(invalidateCallback) {
+          invalidateCallback()
           NULL
         })
 
@@ -525,8 +644,16 @@ Observer <- setRefClass(
       })
 
       ctx$onFlush(function() {
-        if (!.destroyed)
-          run()
+        tryCatch({
+          if (!.destroyed)
+            shinyCallingHandlers(run())
+
+        }, error = function(e) {
+          printError(e)
+          if (!is.null(.domain)) {
+            .domain$unhandledError(e)
+          }
+        })
       })
 
       return(ctx)
@@ -623,7 +750,7 @@ Observer <- setRefClass(
 #'   non-reactive expression.
 #' @param quoted Is the expression quoted? By default, this is \code{FALSE}.
 #'   This is useful when you want to use an expression that is stored in a
-#'   variable; to do so, it must be quoted with `quote()`.
+#'   variable; to do so, it must be quoted with \code{quote()}.
 #' @param label A label for the observer, useful for debugging.
 #' @param suspended If \code{TRUE}, start the observer in a suspended state.
 #'   If \code{FALSE} (the default), start in a non-suspended state.
@@ -634,6 +761,8 @@ Observer <- setRefClass(
 #' @param domain See \link{domains}.
 #' @param autoDestroy If \code{TRUE} (the default), the observer will be
 #'   automatically destroyed when its domain (if any) ends.
+#' @param ..stacktraceon Advanced use only. For stack manipulation purposes; see
+#'   \code{\link{stacktrace}}.
 #' @return An observer reference class object. This object has the following
 #'   methods:
 #'   \describe{
@@ -691,15 +820,16 @@ Observer <- setRefClass(
 #' @export
 observe <- function(x, env=parent.frame(), quoted=FALSE, label=NULL,
                     suspended=FALSE, priority=0,
-                    domain=getDefaultReactiveDomain(), autoDestroy = TRUE) {
+                    domain=getDefaultReactiveDomain(), autoDestroy = TRUE,
+                    ..stacktraceon = TRUE) {
 
   fun <- exprToFunction(x, env, quoted)
   if (is.null(label))
     label <- sprintf('observe(%s)', paste(deparse(body(fun)), collapse='\n'))
 
   o <- Observer$new(fun, label=label, suspended=suspended, priority=priority,
-                    domain=domain, autoDestroy=autoDestroy)
-  registerDebugHook(".func", o, "Observer")
+                    domain=domain, autoDestroy=autoDestroy,
+                    ..stacktraceon=..stacktraceon)
   invisible(o)
 }
 
@@ -806,7 +936,7 @@ setAutoflush <- local({
 #'
 #'   # Anything that calls autoInvalidate will automatically invalidate
 #'   # every 2 seconds.
-#'   autoInvalidate <- reactiveTimer(2000, session)
+#'   autoInvalidate <- reactiveTimer(2000)
 #'
 #'   observe({
 #'     # Invalidate and re-execute this reactive expression every time the
@@ -829,12 +959,7 @@ setAutoflush <- local({
 #' }
 #'
 #' @export
-reactiveTimer <- function(intervalMs=1000, session) {
-  if (missing(session)) {
-    warning("reactiveTimer should be passed a session object or NULL")
-    session <- NULL
-  }
-
+reactiveTimer <- function(intervalMs=1000, session = getDefaultReactiveDomain()) {
   dependents <- Map$new()
   timerCallbacks$schedule(intervalMs, function() {
     # Quit if the session is closed
@@ -901,19 +1026,14 @@ reactiveTimer <- function(intervalMs=1000, session) {
 #'   # input$n changes.
 #'   output$plot <- renderPlot({
 #'     # Re-execute this reactive expression after 2000 milliseconds
-#'     invalidateLater(2000, session)
+#'     invalidateLater(2000)
 #'     hist(isolate(input$n))
 #'   })
 #' })
 #' }
 #'
 #' @export
-invalidateLater <- function(millis, session) {
-  if (missing(session)) {
-    warning("invalidateLater should be passed a session object or NULL")
-    session <- NULL
-  }
-
+invalidateLater <- function(millis, session = getDefaultReactiveDomain()) {
   ctx <- .getReactiveEnvironment()$currentContext()
   timerCallbacks$schedule(millis, function() {
     # Quit if the session is closed
@@ -1161,9 +1281,10 @@ reactiveFileReader <- function(intervalMillis, session, filePath, readFunc, ...)
 isolate <- function(expr) {
   ctx <- Context$new(getDefaultReactiveDomain(), '[isolate]', type='isolate')
   on.exit(ctx$invalidate())
-  ctx$run(function() {
-    expr
-  })
+  # Matching ..stacktraceon../..stacktraceoff.. pair
+  ..stacktraceoff..(ctx$run(function() {
+    ..stacktraceon..(expr)
+  }))
 }
 
 #' Evaluate an expression without a reactive context
@@ -1184,3 +1305,182 @@ maskReactiveContext <- function(expr) {
     expr
   })
 }
+
+#' Event handler
+#'
+#' Respond to "event-like" reactive inputs, values, and expressions.
+#'
+#' Shiny's reactive programming framework is primarily designed for calculated
+#' values (reactive expressions) and side-effect-causing actions (observers)
+#' that respond to \emph{any} of their inputs changing. That's often what is
+#' desired in Shiny apps, but not always: sometimes you want to wait for a
+#' specific action to be taken from the user, like clicking an
+#' \code{\link{actionButton}}, before calculating an expression or taking an
+#' action. A reactive value or expression that is used to trigger other
+#' calculations in this way is called an \emph{event}.
+#'
+#' These situations demand a more imperative, "event handling" style of
+#' programming that is possible--but not particularly intuitive--using the
+#' reactive programming primitives \code{\link{observe}} and
+#' \code{\link{isolate}}. \code{observeEvent} and \code{eventReactive} provide
+#' straightforward APIs for event handling that wrap \code{observe} and
+#' \code{isolate}.
+#'
+#' Use \code{observeEvent} whenever you want to \emph{perform an action} in
+#' response to an event. (Note that "recalculate a value" does not generally
+#' count as performing an action--see \code{eventReactive} for that.) The first
+#' argument is the event you want to respond to, and the second argument is a
+#' function that should be called whenever the event occurs.
+#'
+#' Use \code{eventReactive} to create a \emph{calculated value} that only
+#' updates in response to an event. This is just like a normal
+#' \link[=reactive]{reactive expression} except it ignores all the usual
+#' invalidations that come from its reactive dependencies; it only invalidates
+#' in response to the given event.
+#'
+#' Both \code{observeEvent} and \code{eventReactive} take an \code{ignoreNULL}
+#' parameter that affects behavior when the \code{eventExpr} evaluates to
+#' \code{NULL} (or in the special case of an \code{\link{actionButton}},
+#' \code{0}). In these cases, if \code{ignoreNULL} is \code{TRUE}, then an
+#' \code{observeEvent} will not execute and an \code{eventReactive} will raise a
+#' silent \link[=validate]{validation} error. This is useful behavior if you
+#' don't want to do the action or calculation when your app first starts, but
+#' wait for the user to initiate the action first (like a "Submit" button);
+#' whereas \code{ignoreNULL=FALSE} is desirable if you want to initially perform
+#' the action/calculation and just let the user re-initiate it (like a
+#' "Recalculate" button).
+#'
+#' @param eventExpr A (quoted or unquoted) expression that represents the event;
+#'   this can be a simple reactive value like \code{input$click}, a call to a
+#'   reactive expression like \code{dataset()}, or even a complex expression
+#'   inside curly braces
+#' @param handlerExpr The expression to call whenever \code{eventExpr} is
+#'   invalidated. This should be a side-effect-producing action (the return
+#'   value will be ignored). It will be executed within an \code{\link{isolate}}
+#'   scope.
+#' @param valueExpr The expression that produces the return value of the
+#'   \code{eventReactive}. It will be executed within an \code{\link{isolate}}
+#'   scope.
+#' @param event.env The parent environment for \code{eventExpr}. By default,
+#'   this is the calling environment.
+#' @param event.quoted Is the \code{eventExpr} expression quoted? By default,
+#'   this is \code{FALSE}. This is useful when you want to use an expression
+#'   that is stored in a variable; to do so, it must be quoted with
+#'   \code{quote()}.
+#' @param handler.env The parent environment for \code{handlerExpr}. By default,
+#'   this is the calling environment.
+#' @param handler.quoted Is the \code{handlerExpr} expression quoted? By
+#'   default, this is \code{FALSE}. This is useful when you want to use an
+#'   expression that is stored in a variable; to do so, it must be quoted with
+#'   \code{quote()}.
+#' @param value.env The parent environment for \code{valueExpr}. By default,
+#'   this is the calling environment.
+#' @param value.quoted Is the \code{valueExpr} expression quoted? By default,
+#'   this is \code{FALSE}. This is useful when you want to use an expression
+#'   that is stored in a variable; to do so, it must be quoted with \code{quote()}.
+#' @param label A label for the observer or reactive, useful for debugging.
+#' @param suspended If \code{TRUE}, start the observer in a suspended state. If
+#'   \code{FALSE} (the default), start in a non-suspended state.
+#' @param priority An integer or numeric that controls the priority with which
+#'   this observer should be executed. An observer with a given priority level
+#'   will always execute sooner than all observers with a lower priority level.
+#'   Positive, negative, and zero values are allowed.
+#' @param domain See \link{domains}.
+#' @param autoDestroy If \code{TRUE} (the default), the observer will be
+#'   automatically destroyed when its domain (if any) ends.
+#' @param ignoreNULL Whether the action should be triggered (or value
+#'   calculated, in the case of \code{eventReactive}) when the input is
+#'   \code{NULL}. See Details.
+#' @return \code{observeEvent} returns an observer reference class object (see
+#'   \code{\link{observe}}). \code{eventReactive} returns a reactive expression
+#'   object (see \code{\link{reactive}}).
+#'
+#' @seealso \code{\link{actionButton}}
+#'
+#' @examples
+#' ## Only run this example in interactive R sessions
+#' if (interactive()) {
+#'   ui <- fluidPage(
+#'     column(4,
+#'       numericInput("x", "Value", 5),
+#'       br(),
+#'       actionButton("button", "Show")
+#'     ),
+#'     column(8, tableOutput("table"))
+#'   )
+#'   server <- function(input, output) {
+#'     # Take an action every time button is pressed;
+#'     # here, we just print a message to the console
+#'     observeEvent(input$button, {
+#'       cat("Showing", input$x, "rows\n")
+#'     })
+#'     # Take a reactive dependency on input$button, but
+#'     # not on any of the stuff inside the function
+#'     df <- eventReactive(input$button, {
+#'       head(cars, input$x)
+#'     })
+#'     output$table <- renderTable({
+#'       df()
+#'     })
+#'   }
+#'   shinyApp(ui=ui, server=server)
+#' }
+#'
+#' @export
+observeEvent <- function(eventExpr, handlerExpr,
+  event.env = parent.frame(), event.quoted = FALSE,
+  handler.env = parent.frame(), handler.quoted = FALSE,
+  label=NULL, suspended=FALSE, priority=0, domain=getDefaultReactiveDomain(),
+  autoDestroy = TRUE, ignoreNULL = TRUE) {
+
+  eventFunc <- exprToFunction(eventExpr, event.env, event.quoted)
+  if (is.null(label))
+    label <- sprintf('observeEvent(%s)', paste(deparse(body(eventFunc)), collapse='\n'))
+  eventFunc <- wrapFunctionLabel(eventFunc, "observeEventExpr", ..stacktraceon = TRUE)
+
+  handlerFunc <- exprToFunction(handlerExpr, handler.env, handler.quoted)
+  handlerFunc <- wrapFunctionLabel(handlerFunc, "observeEventHandler", ..stacktraceon = TRUE)
+
+  invisible(observe({
+    e <- eventFunc()
+
+    if (ignoreNULL && isNullEvent(e)) {
+      return()
+    }
+
+    isolate(handlerFunc())
+  }, label = label, suspended = suspended, priority = priority, domain = domain,
+    autoDestroy = TRUE, ..stacktraceon = FALSE))
+}
+
+#' @rdname observeEvent
+#' @export
+eventReactive <- function(eventExpr, valueExpr,
+  event.env = parent.frame(), event.quoted = FALSE,
+  value.env = parent.frame(), value.quoted = FALSE,
+  label=NULL, domain=getDefaultReactiveDomain(),
+  ignoreNULL = TRUE) {
+
+  eventFunc <- exprToFunction(eventExpr, event.env, event.quoted)
+  if (is.null(label))
+    label <- sprintf('eventReactive(%s)', paste(deparse(body(eventFunc)), collapse='\n'))
+  eventFunc <- wrapFunctionLabel(eventFunc, "eventReactiveExpr", ..stacktraceon = TRUE)
+
+  handlerFunc <- exprToFunction(valueExpr, value.env, value.quoted)
+  handlerFunc <- wrapFunctionLabel(handlerFunc, "eventReactiveHandler", ..stacktraceon = TRUE)
+
+  invisible(reactive({
+    e <- eventFunc()
+
+    validate(need(
+      !ignoreNULL || !isNullEvent(e),
+      message = FALSE
+    ))
+
+    isolate(handlerFunc())
+  }, label = label, domain = domain, ..stacktraceon = FALSE))
+}
+
+isNullEvent <- function(value) {
+  is.null(value) || (inherits(value, 'shinyActionButtonValue') && value == 0)
+}

R/render-plot.R

@@ -0,0 +1,706 @@
+#' Plot Output
+#'
+#' Renders a reactive plot that is suitable for assigning to an \code{output}
+#' slot.
+#'
+#' The corresponding HTML output tag should be \code{div} or \code{img} and have
+#' the CSS class name \code{shiny-plot-output}.
+#'
+#' @section Interactive plots:
+#'
+#'   With ggplot2 graphics, the code in \code{renderPlot} should return a ggplot
+#'   object; if instead the code prints the ggplot2 object with something like
+#'   \code{print(p)}, then the coordinates for interactive graphics will not be
+#'   properly scaled to the data space.
+#'
+#'   See \code{\link{plotOutput}} for more information about interactive plots.
+#'
+#' @seealso For the corresponding client-side output function, and example
+#'   usage, see \code{\link{plotOutput}}. For more details on how the plots are
+#'   generated, and how to control the output, see \code{\link{plotPNG}}.
+#'
+#' @param expr An expression that generates a plot.
+#' @param width,height The width/height of the rendered plot, in pixels; or
+#'   \code{'auto'} to use the \code{offsetWidth}/\code{offsetHeight} of the HTML
+#'   element that is bound to this plot. You can also pass in a function that
+#'   returns the width/height in pixels or \code{'auto'}; in the body of the
+#'   function you may reference reactive values and functions. When rendering an
+#'   inline plot, you must provide numeric values (in pixels) to both
+#'   \code{width} and \code{height}.
+#' @param res Resolution of resulting plot, in pixels per inch. This value is
+#'   passed to \code{\link{png}}. Note that this affects the resolution of PNG
+#'   rendering in R; it won't change the actual ppi of the browser.
+#' @param ... Arguments to be passed through to \code{\link[grDevices]{png}}.
+#'   These can be used to set the width, height, background color, etc.
+#' @param env The environment in which to evaluate \code{expr}.
+#' @param quoted Is \code{expr} a quoted expression (with \code{quote()})? This
+#'   is useful if you want to save an expression in a variable.
+#' @param func A function that generates a plot (deprecated; use \code{expr}
+#'   instead).
+#' @param execOnResize If \code{FALSE} (the default), then when a plot is
+#'   resized, Shiny will \emph{replay} the plot drawing commands with
+#'   \code{\link[grDevices]{replayPlot}()} instead of re-executing \code{expr}.
+#'   This can result in faster plot redrawing, but there may be rare cases where
+#'   it is undesirable. If you encounter problems when resizing a plot, you can
+#'   have Shiny re-execute the code on resize by setting this to \code{TRUE}.
+#' @export
+renderPlot <- function(expr, width='auto', height='auto', res=72, ...,
+                       env=parent.frame(), quoted=FALSE, func=NULL,
+                       execOnResize=FALSE) {
+  # This ..stacktraceon is matched by a ..stacktraceoff.. when plotFunc
+  # is called
+  installExprFunction(expr, "func", env, quoted, ..stacktraceon = TRUE)
+
+  args <- list(...)
+
+  if (is.function(width))
+    widthWrapper <- reactive({ width() })
+  else
+    widthWrapper <- function() { width }
+
+  if (is.function(height))
+    heightWrapper <- reactive({ height() })
+  else
+    heightWrapper <- function() { height }
+
+  # A modified version of print.ggplot which returns the built ggplot object
+  # as well as the gtable grob. This overrides the ggplot::print.ggplot
+  # method, but only within the context of renderPlot. The reason this needs
+  # to be a (pseudo) S3 method is so that, if an object has a class in
+  # addition to ggplot, and there's a print method for that class, that we
+  # won't override that method. https://github.com/rstudio/shiny/issues/841
+  print.ggplot <- function(x) {
+    grid::grid.newpage()
+
+    build <- ggplot2::ggplot_build(x)
+
+    gtable <- ggplot2::ggplot_gtable(build)
+    grid::grid.draw(gtable)
+
+    structure(list(
+      build = build,
+      gtable = gtable
+    ), class = "ggplot_build_gtable")
+  }
+
+
+  getDims <- function() {
+    width <- widthWrapper()
+    height <- heightWrapper()
+
+    # Note that these are reactive calls. A change to the width and height
+    # will inherently cause a reactive plot to redraw (unless width and
+    # height were explicitly specified).
+    if (width == 'auto')
+      width <- session$clientData[[paste0('output_', outputName, '_width')]]
+    if (height == 'auto')
+      height <- session$clientData[[paste0('output_', outputName, '_height')]]
+
+    list(width = width, height = height)
+  }
+
+  # Vars to store session and output, so that they can be accessed from
+  # the plotObj() reactive.
+  session <- NULL
+  outputName <- NULL
+
+  # This function is the one that's returned from renderPlot(), and gets
+  # wrapped in an observer when the output value is assigned. The expression
+  # passed to renderPlot() is actually run in plotObj(); this function can only
+  # replay a plot if the width/height changes.
+  renderFunc <- function(shinysession, name, ...) {
+    session <<- shinysession
+    outputName <<- name
+
+    dims <- getDims()
+
+    if (is.null(dims$width) || is.null(dims$height) ||
+        dims$width <= 0 || dims$height <= 0) {
+      return(NULL)
+    }
+
+    # The reactive that runs the expr in renderPlot()
+    plotData <- plotObj()
+
+    img <- plotData$img
+
+    # If only the width/height have changed, simply replay the plot and make a
+    # new img.
+    if (dims$width != img$width || dims$height != img$height) {
+      pixelratio <- session$clientData$pixelratio %OR% 1
+
+      coordmap <- NULL
+      plotFunc <- function() {
+        ..stacktraceon..(replayPlot(plotData$recordedPlot))
+
+        # Coordmap must be recalculated after replaying plot, because pixel
+        # dimensions will have changed.
+        if (inherits(plotData$plotResult, "ggplot_build_gtable")) {
+          coordmap <<- getGgplotCoordmap(plotData$plotResult, pixelratio, res)
+        } else {
+          coordmap <<- getPrevPlotCoordmap(dims$width, dims$height)
+        }
+      }
+      outfile <- ..stacktraceoff..(
+        plotPNG(plotFunc, width = dims$width*pixelratio, height = dims$height*pixelratio,
+                res = res*pixelratio)
+      )
+      on.exit(unlink(outfile))
+
+      img <- dropNulls(list(
+        src = session$fileUrl(name, outfile, contentType='image/png'),
+        width = dims$width,
+        height = dims$height,
+        coordmap = coordmap,
+        # Get coordmap error message if present
+        error = attr(coordmap, "error", exact = TRUE)
+      ))
+    }
+
+    img
+  }
+
+
+  plotObj <- reactive({
+    if (execOnResize) {
+      isolate({ dims <- getDims() })
+    } else {
+      dims <- getDims()
+    }
+
+    if (is.null(dims$width) || is.null(dims$height) ||
+        dims$width <= 0 || dims$height <= 0) {
+      return(NULL)
+    }
+
+    # Resolution multiplier
+    pixelratio <- session$clientData$pixelratio %OR% 1
+
+    plotResult <- NULL
+    recordedPlot <- NULL
+    coordmap <- NULL
+    plotFunc <- function() {
+      success <-FALSE
+      tryCatch(
+        {
+          # Actually perform the plotting
+          result <- withVisible(func())
+          success <- TRUE
+        },
+        finally = {
+          if (!success) {
+            # If there was an error in making the plot, there's a good chance
+            # it's "Error in plot.new: figure margins too large". We need to
+            # take a reactive dependency on the width and height, so that the
+            # user's plotting code will re-execute when the plot is resized,
+            # instead of just replaying the previous plot (which errored).
+            getDims()
+          }
+        }
+      )
+
+      if (result$visible) {
+        # Use capture.output to squelch printing to the actual console; we
+        # are only interested in plot output
+        utils::capture.output({
+          # This ..stacktraceon.. negates the ..stacktraceoff.. that wraps
+          # the call to plotFunc. The value needs to be printed just in case
+          # it's an object that requires printing to generate plot output,
+          # similar to ggplot2. But for base graphics, it would already have
+          # been rendered when func was called above, and the print should
+          # have no effect.
+          plotResult <<- ..stacktraceon..(print(result$value))
+        })
+      }
+
+      recordedPlot <<- recordPlot()
+
+      if (inherits(plotResult, "ggplot_build_gtable")) {
+        coordmap <<- getGgplotCoordmap(plotResult, pixelratio, res)
+      } else {
+        coordmap <<- getPrevPlotCoordmap(dims$width, dims$height)
+      }
+    }
+
+    # This ..stacktraceoff.. is matched by the `func` function's
+    # wrapFunctionLabel(..stacktraceon=TRUE) call near the beginning of
+    # renderPlot, and by the ..stacktraceon.. in plotFunc where ggplot objects
+    # are printed
+    outfile <- ..stacktraceoff..(
+      do.call(plotPNG, c(plotFunc, width=dims$width*pixelratio,
+        height=dims$height*pixelratio, res=res*pixelratio, args))
+    )
+    on.exit(unlink(outfile))
+
+    list(
+      # img is the content that gets sent to the client.
+      img = dropNulls(list(
+        src = session$fileUrl(outputName, outfile, contentType='image/png'),
+        width = dims$width,
+        height = dims$height,
+        coordmap = coordmap,
+        # Get coordmap error message if present.
+        error = attr(coordmap, "error", exact = TRUE)
+      )),
+      # Returned value from expression in renderPlot() -- may be a printable
+      # object like ggplot2. Needed just in case we replayPlot and need to get
+      # a coordmap again.
+      plotResult = plotResult,
+      recordedPlot = recordedPlot
+    )
+  })
+
+
+  # If renderPlot isn't going to adapt to the height of the div, then the
+  # div needs to adapt to the height of renderPlot. By default, plotOutput
+  # sets the height to 400px, so to make it adapt we need to override it
+  # with NULL.
+  outputFunc <- plotOutput
+  if (!identical(height, 'auto')) formals(outputFunc)['height'] <- list(NULL)
+
+  markRenderFunction(outputFunc, renderFunc)
+}
+
+# The coordmap extraction functions below return something like the examples
+# below. For base graphics:
+# plot(mtcars$wt, mtcars$mpg)
+# str(getPrevPlotCoordmap(400, 300))
+# List of 1
+#  $ :List of 4
+#   ..$ domain :List of 4
+#   .. ..$ left  : num 1.36
+#   .. ..$ right : num 5.58
+#   .. ..$ bottom: num 9.46
+#   .. ..$ top   : num 34.8
+#   ..$ range  :List of 4
+#   .. ..$ left  : num 50.4
+#   .. ..$ right : num 373
+#   .. ..$ bottom: num 199
+#   .. ..$ top   : num 79.6
+#   ..$ log    :List of 2
+#   .. ..$ x: NULL
+#   .. ..$ y: NULL
+#   ..$ mapping: Named list()
+#
+# For ggplot2, it might be something like:
+# p <- ggplot(mtcars, aes(wt, mpg)) + geom_point()
+# str(getGgplotCoordmap(p, 1))
+# List of 1
+#  $ :List of 10
+#   ..$ panel     : int 1
+#   ..$ row       : int 1
+#   ..$ col       : int 1
+#   ..$ panel_vars: Named list()
+#   ..$ scale_x   : int 1
+#   ..$ scale_y   : int 1
+#   ..$ log       :List of 2
+#   .. ..$ x: NULL
+#   .. ..$ y: NULL
+#   ..$ domain    :List of 4
+#   .. ..$ left  : num 1.32
+#   .. ..$ right : num 5.62
+#   .. ..$ bottom: num 9.22
+#   .. ..$ top   : num 35.1
+#   ..$ mapping   :List of 2
+#   .. ..$ x: chr "wt"
+#   .. ..$ y: chr "mpg"
+#   ..$ range     :List of 4
+#   .. ..$ left  : num 40.8
+#   .. ..$ right : num 446
+#   .. ..$ bottom: num 263
+#   .. ..$ top   : num 14.4
+#
+# With a faceted ggplot2 plot, the outer list contains two objects, each of
+# which represents one panel. In this example, there is one panelvar, but there
+# can be up to two of them.
+# mtc <- mtcars
+# mtc$am <- factor(mtc$am)
+# p <- ggplot(mtcars, aes(wt, mpg)) + geom_point() + facet_wrap(~ am)
+# str(getGgplotCoordmap(p, 1))
+# List of 2
+#  $ :List of 10
+#   ..$ panel     : int 1
+#   ..$ row       : int 1
+#   ..$ col       : int 1
+#   ..$ panel_vars:List of 1
+#   .. ..$ panelvar1: Factor w/ 2 levels "0","1": 1
+#   ..$ scale_x   : int 1
+#   ..$ scale_y   : int 1
+#   ..$ log       :List of 2
+#   .. ..$ x: NULL
+#   .. ..$ y: NULL
+#   ..$ domain    :List of 4
+#   .. ..$ left  : num 1.32
+#   .. ..$ right : num 5.62
+#   .. ..$ bottom: num 9.22
+#   .. ..$ top   : num 35.1
+#   ..$ mapping   :List of 3
+#   .. ..$ x        : chr "wt"
+#   .. ..$ y        : chr "mpg"
+#   .. ..$ panelvar1: chr "am"
+#   ..$ range     :List of 4
+#   .. ..$ left  : num 45.6
+#   .. ..$ right : num 317
+#   .. ..$ bottom: num 251
+#   .. ..$ top   : num 35.7
+#  $ :List of 10
+#   ..$ panel     : int 2
+#   ..$ row       : int 1
+#   ..$ col       : int 2
+#   ..$ panel_vars:List of 1
+#   .. ..$ panelvar1: Factor w/ 2 levels "0","1": 2
+#   ..$ scale_x   : int 1
+#   ..$ scale_y   : int 1
+#   ..$ log       :List of 2
+#   .. ..$ x: NULL
+#   .. ..$ y: NULL
+#   ..$ domain    :List of 4
+#   .. ..$ left  : num 1.32
+#   .. ..$ right : num 5.62
+#   .. ..$ bottom: num 9.22
+#   .. ..$ top   : num 35.1
+#   ..$ mapping   :List of 3
+#   .. ..$ x        : chr "wt"
+#   .. ..$ y        : chr "mpg"
+#   .. ..$ panelvar1: chr "am"
+#   ..$ range     :List of 4
+#   .. ..$ left  : num 322
+#   .. ..$ right : num 594
+#   .. ..$ bottom: num 251
+#   .. ..$ top   : num 35.7
+
+
+# Get a coordmap for the previous plot made with base graphics.
+# Requires width and height of output image, in pixels.
+# Must be called before the graphics device is closed.
+getPrevPlotCoordmap <- function(width, height) {
+  usrCoords <- graphics::par('usr')
+  usrBounds <- usrCoords
+  if (graphics::par('xlog')) {
+    usrBounds[c(1,2)] <- 10 ^ usrBounds[c(1,2)]
+  }
+  if (graphics::par('ylog')) {
+    usrBounds[c(3,4)] <- 10 ^ usrBounds[c(3,4)]
+  }
+
+  # Wrapped in double list because other types of plots can have multiple panels.
+  list(list(
+    # Bounds of the plot area, in data space
+    domain = list(
+      left = usrCoords[1],
+      right = usrCoords[2],
+      bottom = usrCoords[3],
+      top = usrCoords[4]
+    ),
+    # The bounds of the plot area, in DOM pixels
+    range = list(
+      left = graphics::grconvertX(usrBounds[1], 'user', 'nfc') * width,
+      right = graphics::grconvertX(usrBounds[2], 'user', 'nfc') * width,
+      bottom = (1-graphics::grconvertY(usrBounds[3], 'user', 'nfc')) * height - 1,
+      top = (1-graphics::grconvertY(usrBounds[4], 'user', 'nfc')) * height - 1
+    ),
+    log = list(
+      x = if (graphics::par('xlog')) 10 else NULL,
+      y = if (graphics::par('ylog')) 10 else NULL
+    ),
+    # We can't extract the original variable names from a base graphic.
+    # `mapping` is an empty _named_ list, so that it is converted to an object
+    # (not an array) in JSON.
+    mapping = list(x = NULL)[0]
+  ))
+}
+
+
+# Given a ggplot_build_gtable object, return a coordmap for it.
+getGgplotCoordmap <- function(p, pixelratio, res) {
+  if (!inherits(p, "ggplot_build_gtable"))
+    return(NULL)
+
+  # Given a built ggplot object, return x and y domains (data space coords) for
+  # each panel.
+  find_panel_info <- function(b) {
+    layout <- b$panel$layout
+    # Convert factor to numbers
+    layout$PANEL <- as.integer(as.character(layout$PANEL))
+
+    # Names of facets
+    facet <- b$plot$facet
+    facet_vars <- NULL
+    if (inherits(facet, "grid")) {
+      facet_vars <- vapply(c(facet$cols, facet$rows), as.character, character(1))
+    } else if (inherits(facet, "wrap")) {
+      facet_vars <- vapply(facet$facets, as.character, character(1))
+    }
+
+    # Iterate over each row in the layout data frame
+    lapply(seq_len(nrow(layout)), function(i) {
+      # Slice out one row
+      l <- layout[i, ]
+
+      scale_x <- l$SCALE_X
+      scale_y <- l$SCALE_Y
+
+      mapping <- find_plot_mappings(b)
+
+      # For each of the faceting variables, get the value of that variable in
+      # the current panel. Default to empty _named_ list so that it's sent as a
+      # JSON object, not array.
+      panel_vars <- list(a = NULL)[0]
+      for (i in seq_along(facet_vars)) {
+        var_name <- facet_vars[[i]]
+        vname <- paste0("panelvar", i)
+
+        mapping[[vname]] <- var_name
+        panel_vars[[vname]] <- l[[var_name]]
+      }
+
+      list(
+        panel   = l$PANEL,
+        row     = l$ROW,
+        col     = l$COL,
+        panel_vars = panel_vars,
+        scale_x = scale_x,
+        scale_y = scale_x,
+        log     = check_log_scales(b, scale_x, scale_y),
+        domain  = find_panel_domain(b, l$PANEL, scale_x, scale_y),
+        mapping = mapping
+      )
+    })
+  }
+
+  # Given a single range object (representing the data domain) from a built
+  # ggplot object, return the domain.
+  find_panel_domain <- function(b, panel_num, scalex_num = 1, scaley_num = 1) {
+    range <- b$panel$ranges[[panel_num]]
+    domain <- list(
+      left   = range$x.range[1],
+      right  = range$x.range[2],
+      bottom = range$y.range[1],
+      top    = range$y.range[2]
+    )
+
+    # Check for reversed scales
+    xscale <- b$panel$x_scales[[scalex_num]]
+    yscale <- b$panel$y_scales[[scaley_num]]
+
+    if (!is.null(xscale$trans) && xscale$trans$name == "reverse") {
+      domain$left  <- -domain$left
+      domain$right <- -domain$right
+    }
+    if (!is.null(yscale$trans) && yscale$trans$name == "reverse") {
+      domain$top    <- -domain$top
+      domain$bottom <- -domain$bottom
+    }
+
+    domain
+  }
+
+  # Given built ggplot object, return object with the log base for x and y if
+  # there are log scales or coord transforms.
+  check_log_scales <- function(b, scalex_num = 1, scaley_num = 1) {
+
+    # Given a vector of transformation names like c("log-10", "identity"),
+    # return the first log base, like 10. If none are present, return NULL.
+    extract_log_base <- function(names) {
+      names <- names[grepl("^log-", names)]
+
+      if (length(names) == 0)
+        return(NULL)
+
+      names <- names[1]
+
+      as.numeric(sub("^log-", "", names))
+    }
+
+    # Look for log scales and log coord transforms. People shouldn't use both.
+    x_names <- character(0)
+    y_names <- character(0)
+
+    # Continuous scales have a trans; discrete ones don't
+    if (!is.null(b$panel$x_scales[[scalex_num]]$trans))
+      x_names <- b$panel$x_scales[[scalex_num]]$trans$name
+    if (!is.null(b$panel$y_scales[[scaley_num]]$trans))
+      y_names <- b$panel$y_scales[[scaley_num]]$trans$name
+
+    coords <- b$plot$coordinates
+    if (!is.null(coords$trans)) {
+      if (!is.null(coords$trans$x))
+        x_names <- c(x_names, coords$trans$x$name)
+      if (!is.null(coords$trans$y))
+        y_names <- c(y_names, coords$trans$y$name)
+    }
+
+    # Keep only scale/trans names that start with "log-"
+    x_names <- x_names[grepl("^log-", x_names)]
+    y_names <- y_names[grepl("^log-", y_names)]
+
+    # Extract the log base from the trans name -- a string like "log-10".
+    list(
+      x = extract_log_base(x_names),
+      y = extract_log_base(y_names)
+    )
+  }
+
+  # Given a built ggplot object, return a named list of variables mapped to x
+  # and y. This function will be called for each panel, but in practice the
+  # result is always the same across panels, so we'll cache the result.
+  mappings_cache <- NULL
+  find_plot_mappings <- function(b) {
+    if (!is.null(mappings_cache))
+      return(mappings_cache)
+
+    # lapply'ing as.character results in unexpected behavior for expressions
+    # like `wt/2`. This works better.
+    mappings <- as.list(as.character(b$plot$mapping))
+
+    # If x or y mapping is missing, look in each layer for mappings and return
+    # the first one.
+    missing_mappings <- setdiff(c("x", "y"), names(mappings))
+    if (length(missing_mappings) != 0) {
+      # Grab mappings for each layer
+      layer_mappings <- lapply(b$plot$layers, function(layer) {
+        lapply(layer$mapping, as.character)
+      })
+
+      # Get just the first x or y value in the combined list of plot and layer
+      # mappings.
+      mappings <- c(list(mappings), layer_mappings)
+      mappings <- Reduce(x = mappings, init = list(x = NULL, y = NULL),
+        function(init, m) {
+          if (is.null(init$x) && !is.null(m$x)) init$x <- m$x
+          if (is.null(init$y) && !is.null(m$y)) init$y <- m$y
+          init
+        }
+      )
+    }
+
+    mappings_cache <<- mappings
+    mappings
+  }
+
+  # Given a gtable object, return the x and y ranges (in pixel dimensions)
+  find_panel_ranges <- function(g, pixelratio) {
+    # Given a vector of unit objects, return logical vector indicating which ones
+    # are "null" units. These units use the remaining available width/height --
+    # that is, the space not occupied by elements that have an absolute size.
+    is_null_unit <- function(x) {
+      # A vector of units can be either a list of individual units (a unit.list
+      # object), each with their own set of attributes, or an atomic vector with
+      # one set of attributes. ggplot2 switched from the former (in version
+      # 1.0.1) to the latter. We need to make sure that we get the correct
+      # result in both cases.
+      if (inherits(x, "unit.list")) {
+        # For ggplot2 <= 1.0.1
+        vapply(x, FUN.VALUE = logical(1), function(u) {
+          isTRUE(attr(u, "unit", exact = TRUE) == "null")
+        })
+      } else {
+        # For later versions of ggplot2
+        attr(x, "unit", exact = TRUE) == "null"
+      }
+    }
+
+    # Workaround for a bug in the quartz device. If you have a 400x400 image and
+    # run `convertWidth(unit(1, "npc"), "native")`, the result will depend on
+    # res setting of the device. If res=72, then it returns 400 (as expected),
+    # but if, e.g., res=96, it will return 300, which is incorrect.
+    devScaleFactor <- 1
+    if (grepl("quartz", names(dev.cur()), fixed = TRUE)) {
+      devScaleFactor <- res / 72
+    }
+
+    # Convert a unit (or vector of units) to a numeric vector of pixel sizes
+    h_px <- function(x) {
+      devScaleFactor * grid::convertHeight(x, "native", valueOnly = TRUE)
+    }
+    w_px <- function(x) {
+      devScaleFactor * grid::convertWidth(x, "native", valueOnly = TRUE)
+    }
+
+    # Given a vector of relative sizes (in grid units), and a function for
+    # converting grid units to numeric pixels, return a numeric vector of
+    # pixel sizes.
+    find_px_sizes <- function(rel_sizes, unit_to_px) {
+      # Total pixels (in height or width)
+      total_px <- unit_to_px(grid::unit(1, "npc"))
+      # Calculate size of all panel(s) together. Panels (and only panels) have
+      # null size.
+      null_idx <- is_null_unit(rel_sizes)
+      # All the absolute heights. At this point, null heights are 0. We need to
+      # calculate them separately and add them in later.
+      px_sizes <- unit_to_px(rel_sizes)
+      # Total size for panels is image size minus absolute (non-panel) elements
+      panel_px_total <- total_px - sum(px_sizes)
+      # Divide up the total panel size up into the panels (scaled by size)
+      panel_sizes_rel <- as.numeric(rel_sizes[null_idx])
+      panel_sizes_rel <- panel_sizes_rel / sum(panel_sizes_rel)
+      px_sizes[null_idx] <- panel_px_total * panel_sizes_rel
+      abs(px_sizes)
+    }
+
+    px_heights <- find_px_sizes(g$heights, h_px)
+    px_widths <- find_px_sizes(g$widths, w_px)
+
+    # Convert to absolute pixel positions
+    x_pos <- cumsum(px_widths)
+    y_pos <- cumsum(px_heights)
+
+    # Match up the pixel dimensions to panels
+    layout <- g$layout
+    # For panels:
+    # * For facet_wrap, they'll be named "panel-1", "panel-2", etc.
+    # * For no facet or facet_grid, they'll just be named "panel". For
+    #   facet_grid, we need to re-order the layout table. Assume that panel
+    #   numbers go from left to right, then next row.
+    # Assign a number to each panel, corresponding to PANEl in the built ggplot
+    # object.
+    layout <- layout[grepl("^panel", layout$name), ]
+    layout <- layout[order(layout$t, layout$l), ]
+    layout$panel <- seq_len(nrow(layout))
+
+    # When using a HiDPI client on a Linux server, the pixel
+    # dimensions are doubled, so we have to divide the dimensions by
+    # `pixelratio`. When a HiDPI client is used on a Mac server (with
+    # the quartz device), the pixel dimensions _aren't_ doubled, even though
+    # the image has double size. In the latter case we don't have to scale the
+    # numbers down.
+    pix_ratio <- 1
+    if (!grepl("^quartz", names(grDevices::dev.cur()))) {
+      pix_ratio <- pixelratio
+    }
+
+    # Return list of lists, where each inner list has left, right, top, bottom
+    # values for a panel
+    lapply(seq_len(nrow(layout)), function(i) {
+      p <- layout[i, , drop = FALSE]
+      list(
+        left   = x_pos[p$l - 1] / pix_ratio,
+        right  = x_pos[p$r] / pix_ratio,
+        bottom = y_pos[p$b] / pix_ratio,
+        top    = y_pos[p$t - 1] / pix_ratio
+      )
+    })
+  }
+
+
+  tryCatch({
+    # Get info from built ggplot object
+    info <- find_panel_info(p$build)
+
+    # Get ranges from gtable - it's possible for this to return more elements than
+    # info, because it calculates positions even for panels that aren't present.
+    # This can happen with facet_wrap.
+    ranges <- find_panel_ranges(p$gtable, pixelratio)
+
+    for (i in seq_along(info)) {
+      info[[i]]$range <- ranges[[i]]
+    }
+
+    return(info)
+
+  }, error = function(e) {
+    # If there was an error extracting info from the ggplot object, just return
+    # a list with the error message.
+    return(structure(list(), error = e$message))
+  })
+}

R/render-table.R

@@ -0,0 +1,208 @@
+#' Table Output
+#'
+#' Creates a reactive table that is suitable for assigning to an \code{output}
+#' slot.
+#'
+#' The corresponding HTML output tag should be \code{div} and have the CSS
+#' class name \code{shiny-html-output}.
+#'
+#' @param expr An expression that returns an R object that can be used with
+#'   \code{\link[xtable]{xtable}}.
+#' @param striped,hover,bordered Logicals: if \code{TRUE}, apply the
+#'   corresponding Bootstrap table format to the output table.
+#' @param spacing The spacing between the rows of the table (\code{xs}
+#'   stands for "extra small", \code{s} for "small", \code{m} for "medium"
+#'   and \code{l} for "large").
+#' @param width Table width. Must be a valid CSS unit (like "100%", "400px",
+#'   "auto") or a number, which will be coerced to a string and
+#'   have "px" appended.
+#' @param align A string that specifies the column alignment. If equal to
+#'   \code{'l'}, \code{'c'} or \code{'r'}, then all columns will be,
+#'   respectively, left-, center- or right-aligned. Otherwise, \code{align}
+#'   must have the same number of characters as the resulting table (if
+#'   \code{rownames = TRUE}, this will be equal to \code{ncol()+1}), with
+#'   the \emph{i}-th character specifying the alignment for the
+#'   \emph{i}-th column (besides \code{'l'}, \code{'c'} and
+#'   \code{'r'}, \code{'?'} is also permitted - \code{'?'} is a placeholder
+#'   for that particular column, indicating that it should keep its default
+#'   alignment). If \code{NULL}, then all numeric/integer columns (including
+#'   the row names, if they are numbers) will be right-aligned and
+#'   everything else will be left-aligned (\code{align = '?'} produces the
+#'   same result).
+#' @param rownames,colnames Logicals: include rownames? include colnames
+#'   (column headers)?
+#' @param digits An integer specifying the number of decimal places for
+#'   the numeric columns (this will not apply to columns with an integer
+#'   class). If \code{digits} is set to a negative value, then the numeric
+#'   columns will be displayed in scientific format with a precision of
+#'   \code{abs(digits)} digits.
+#' @param na The string to use in the table cells whose values are missing
+#'   (i.e. they either evaluate to \code{NA} or \code{NaN}).
+#' @param ... Arguments to be passed through to \code{\link[xtable]{xtable}}
+#'   and \code{\link[xtable]{print.xtable}}.
+#' @param env The environment in which to evaluate \code{expr}.
+#' @param quoted Is \code{expr} a quoted expression (with \code{quote()})?
+#'   This is useful if you want to save an expression in a variable.
+#' @param func A function that returns an R object that can be used with
+#'   \code{\link[xtable]{xtable}} (deprecated; use \code{expr} instead).
+#'
+#' @export
+renderTable <- function(expr, striped = FALSE, hover = FALSE,
+                        bordered = FALSE, spacing = c("s", "xs", "m", "l"),
+                        width = "auto", align = NULL,
+                        rownames = FALSE, colnames = TRUE,
+                        digits = NULL, na = "NA", ...,
+                        env = parent.frame(), quoted = FALSE, func = NULL) {
+  if (!is.null(func)) {
+    shinyDeprecated(msg = "renderTable: argument 'func' is deprecated. Please use 'expr' instead.")
+  } else {
+    installExprFunction(expr, "func", env, quoted)
+  }
+
+  if (!is.function(spacing)) spacing <- match.arg(spacing)
+
+  # A small helper function to create a wrapper for an argument that was
+  # passed to renderTable()
+  createWrapper <- function(arg) {
+    if (is.function(arg)) wrapper <- arg
+    else wrapper <- function() arg
+    return(wrapper)
+  }
+
+  # Create wrappers for most arguments so that functions can also be passed
+  # in, rather than only literals (useful for shiny apps)
+  stripedWrapper <- createWrapper(striped)
+  hoverWrapper <- createWrapper(hover)
+  borderedWrapper <- createWrapper(bordered)
+  spacingWrapper <- createWrapper(spacing)
+  widthWrapper <- createWrapper(width)
+  alignWrapper <- createWrapper(align)
+  rownamesWrapper <- createWrapper(rownames)
+  colnamesWrapper <- createWrapper(colnames)
+  digitsWrapper <- createWrapper(digits)
+  naWrapper <- createWrapper(na)
+
+  # Main render function
+  markRenderFunction(tableOutput, function() {
+    striped <- stripedWrapper()
+    hover <- hoverWrapper()
+    bordered <- borderedWrapper()
+    format <- c(striped = striped, hover = hover, bordered = bordered)
+    spacing <- spacingWrapper()
+    width <- widthWrapper()
+    align <- alignWrapper()
+    rownames <- rownamesWrapper()
+    colnames <- colnamesWrapper()
+    digits <- digitsWrapper()
+    na <- naWrapper()
+
+    spacing_choices <- c("s", "xs", "m", "l")
+    if (!(spacing %in% spacing_choices)) {
+      stop(paste("`spacing` must be one of",
+                 paste0("'", spacing_choices, "'", collapse=", ")))
+    }
+
+    # For css styling
+    classNames <- paste0("table shiny-table",
+                         paste0(" table-", names(format)[format], collapse = "" ),
+                         paste0(" spacing-", spacing))
+
+    data <- func()
+    data <- as.data.frame(data)
+
+    # Return NULL if no data is provided
+    if (is.null(data) ||
+        (is.data.frame(data) && nrow(data) == 0 && ncol(data) == 0))
+      return(NULL)
+
+    # Separate the ... args to pass to xtable() vs print.xtable()
+    dots <- list(...)
+    xtable_argnames <- setdiff(names(formals(xtable)), c("x", "..."))
+    xtable_args <- dots[intersect(names(dots), xtable_argnames)]
+    non_xtable_args <- dots[setdiff(names(dots), xtable_argnames)]
+
+    # By default, numbers are right-aligned and everything else is left-aligned.
+    defaultAlignment <- function(col) {
+      if (is.numeric(col)) "r" else "l"
+    }
+
+    # Figure out column alignment
+    ## Case 1: default alignment
+    if (is.null(align) || align == "?") {
+      names <- defaultAlignment(attr(data, "row.names"))
+      cols <- paste(vapply(data, defaultAlignment, character(1)), collapse = "")
+      cols <- paste0(names, cols)
+    } else {
+    ## Case 2: user-specified alignment
+      num_cols <- if (rownames) nchar(align) else nchar(align)+1
+      valid <- !grepl("[^lcr\\?]", align)
+      if (num_cols == ncol(data)+1 && valid) {
+        cols <- if (rownames) align else paste0("r", align)
+        defaults <- grep("\\?", strsplit(cols,"")[[1]])
+        if (length(defaults) != 0) {
+          vals <- vapply(data[,defaults-1], defaultAlignment, character(1))
+          for (i in seq_len(length(defaults))) {
+            substr(cols, defaults[i], defaults[i]) <- vals[i]
+          }
+        }
+      } else if (nchar(align) == 1 && valid) {
+        cols <- paste0(rep(align, ncol(data)+1), collapse="")
+      } else {
+        stop("`align` must contain only the characters `l`, `c`, `r` and/or `?` and",
+             "have length either equal to 1 or to the total number of columns")
+      }
+    }
+
+    # Call xtable with its (updated) args
+    xtable_args <- c(xtable_args, align = cols, digits = digits)
+    xtable_res <- do.call(xtable, c(list(data), xtable_args))
+
+    # Set up print args
+    print_args <- list(
+      xtable_res,
+      type = 'html',
+      include.rownames = rownames,
+      include.colnames = colnames,
+      NA.string = na,
+      html.table.attributes = paste0("class = '", htmlEscape(classNames, TRUE), "' ",
+                                     "style = 'width:", validateCssUnit(width), ";'"))
+
+    print_args <- c(print_args, non_xtable_args)
+
+    # Capture the raw html table returned by print.xtable(), and store it in
+    # a variable for further processing
+    tab <- paste(utils::capture.output(do.call(print, print_args)),collapse = "\n")
+
+    # Add extra class to cells with NA value, to be able to style them separately
+    tab <- gsub(paste(">", na, "<"), paste(" class='NA'>", na, "<"), tab)
+
+    # All further processing concerns the table headers, so we don't need to run
+    # any of this if colnames=FALSE
+    if (colnames) {
+      # Make sure that the final html table has a proper header (not included
+      # in the print.xtable() default)
+      tab <- sub("<tr>", "<thead> <tr>", tab)
+      tab <- sub("</tr>", "</tr> </thead> <tbody>", tab)
+      tab <- sub("</table>$", "</tbody> </table>", tab)
+
+      # Update the `cols` string (which stores the alignment of each column) so
+      # that it only includes the alignment for the table variables (and not
+      # for the row.names)
+      cols <- if (rownames) cols else substr(cols, 2, nchar(cols))
+
+      # Create a vector whose i-th entry corresponds to the i-th table variable
+      # alignment (substituting "l" by "left", "c" by "center" and "r" by "right")
+      cols <- strsplit(cols, "")[[1]]
+      cols[cols == "l"] <- "left"
+      cols[cols == "r"] <- "right"
+      cols[cols == "c"] <- "center"
+
+      # Align each header accordingly (this guarantees that each header and its
+      # corresponding column have the same alignment)
+      for (i in seq_len(length(cols))) {
+        tab <- sub("<th>", paste0("<th style='text-align: ", cols[i], ";'>"), tab)
+      }
+    }
+    return(tab)
+  })
+}

R/run-url.R

@@ -1,124 +1,35 @@
-#' Run a Shiny application from https://gist.github.com
-#'
-#' Download and launch a Shiny application that is hosted on GitHub as a gist.
-#'
-#' @param gist The identifier of the gist. For example, if the gist is
-#'   https://gist.github.com/jcheng5/3239667, then \code{3239667},
-#'   \code{'3239667'}, and \code{'https://gist.github.com/jcheng5/3239667'}
-#'   are all valid values.
-#' @param port The TCP port that the application should listen on. Defaults to
-#'   choosing a random port.
-#' @param launch.browser If true, the system's default web browser will be
-#'   launched automatically after the app is started. Defaults to true in
-#'   interactive sessions only.
-#'
-#' @examples
-#' \dontrun{
-#' runGist(3239667)
-#' runGist("https://gist.github.com/jcheng5/3239667")
-#'
-#' # Old URL format without username
-#' runGist("https://gist.github.com/3239667")
-#' }
-#'
-#' @export
-runGist <- function(gist,
-                    port=NULL,
-                    launch.browser=getOption('shiny.launch.browser',
-                                             interactive())) {
-
-  gistUrl <- if (is.numeric(gist) || grepl('^[0-9a-f]+$', gist)) {
-    sprintf('https://gist.github.com/%s/download', gist)
-  } else if(grepl('^https://gist.github.com/([^/]+/)?([0-9a-f]+)$', gist)) {
-    paste(gist, '/download', sep='')
-  } else {
-    stop('Unrecognized gist identifier format')
-  }
-
-  runUrl(gistUrl, filetype=".tar.gz", subdir=NULL, port=port,
-    launch.browser=launch.browser)
-}
-
-
-#' Run a Shiny application from a GitHub repository
-#'
-#' Download and launch a Shiny application that is hosted in a GitHub repository.
-#'
-#' @param repo Name of the repository
-#' @param username GitHub username
-#' @param ref Desired git reference. Could be a commit, tag, or branch
-#'   name. Defaults to \code{"master"}.
-#' @param subdir A subdirectory in the repository that contains the app. By
-#'   default, this function will run an app from the top level of the repo, but
-#'   you can use a path such as `\code{"inst/shinyapp"}.
-#' @param port The TCP port that the application should listen on. Defaults to
-#'   choosing a random port.
-#' @param launch.browser If true, the system's default web browser will be
-#'   launched automatically after the app is started. Defaults to true in
-#'   interactive sessions only.
-#'
-#' @examples
-#' \dontrun{
-#' runGitHub("shiny_example", "rstudio")
-#'
-#' # Can run an app from a subdirectory in the repo
-#' runGitHub("shiny_example", "rstudio", subdir = "inst/shinyapp/")
-#' }
-#'
-#' @export
-runGitHub <- function(repo, username = getOption("github.user"),
-  ref = "master", subdir = NULL, port = NULL,
-  launch.browser = getOption('shiny.launch.browser', interactive())) {
-
-  if (is.null(ref)) {
-    stop("Must specify either a ref. ")
-  }
-
-  message("Downloading github repo(s) ",
-    paste(repo, ref, sep = "/", collapse = ", "),
-    " from ",
-    paste(username, collapse = ", "))
-  name <- paste(username, "-", repo, sep = "")
-
-  url <- paste("https://github.com/", username, "/", repo, "/archive/",
-    ref, ".tar.gz", sep = "")
-
-  runUrl(url, subdir=subdir, port=port, launch.browser=launch.browser)
-}
-
-
 #' Run a Shiny application from a URL
 #'
-#' Download and launch a Shiny application that is hosted at a downloadable
-#' URL. The Shiny application must be saved in a .zip, .tar, or .tar.gz file.
-#' The Shiny application files must be contained in a subdirectory in the
-#' archive. For example, the files might be \code{myapp/server.r} and
-#' \code{myapp/ui.r}.
-#'
+#' \code{runUrl()} downloads and launches a Shiny application that is hosted at
+#' a downloadable URL. The Shiny application must be saved in a .zip, .tar, or
+#' .tar.gz file. The Shiny application files must be contained in the root
+#' directory or a subdirectory in the archive. For example, the files might be
+#' \code{myapp/server.r} and \code{myapp/ui.r}. The functions \code{runGitHub()}
+#' and \code{runGist()} are based on \code{runUrl()}, using URL's from GitHub
+#' (\url{https://github.com}) and GitHub gists (\url{https://gist.github.com}),
+#' respectively.
 #' @param url URL of the application.
 #' @param filetype The file type (\code{".zip"}, \code{".tar"}, or
 #'   \code{".tar.gz"}. Defaults to the file extension taken from the url.
 #' @param subdir A subdirectory in the repository that contains the app. By
 #'   default, this function will run an app from the top level of the repo, but
 #'   you can use a path such as `\code{"inst/shinyapp"}.
-#' @param port The TCP port that the application should listen on. Defaults to
-#'   choosing a random port.
-#' @param launch.browser If true, the system's default web browser will be
-#'   launched automatically after the app is started. Defaults to true in
-#'   interactive sessions only.
-#'
-#' @examples
-#' \dontrun{
-#' runUrl('https://github.com/rstudio/shiny_example/archive/master.tar.gz')
-#'
-#' # Can run an app from a subdirectory in the archive
-#' runUrl("https://github.com/rstudio/shiny_example/archive/master.zip",
-#'  subdir = "inst/shinyapp/")
-#' }
-#'
+#' @param destdir Directory to store the downloaded application files. If \code{NULL}
+#'   (the default), the application files will be stored in a temporary directory
+#'   and removed when the app exits
+#' @param ... Other arguments to be passed to \code{\link{runApp}()}, such as
+#'   \code{port} and \code{launch.browser}.
 #' @export
-runUrl <- function(url, filetype = NULL, subdir = NULL, port = NULL,
-  launch.browser = getOption('shiny.launch.browser', interactive())) {
+#' @examples
+#' ## Only run this example in interactive R sessions
+#'   if (interactive()) {
+#'   runUrl('https://github.com/rstudio/shiny_example/archive/master.tar.gz')
+#'
+#'   # Can run an app from a subdirectory in the archive
+#'   runUrl("https://github.com/rstudio/shiny_example/archive/master.zip",
+#'     subdir = "inst/shinyapp/")
+#' }
+runUrl <- function(url, filetype = NULL, subdir = NULL, destdir = NULL, ...) {
 
   if (!is.null(subdir) && ".." %in% strsplit(subdir, '/')[[1]])
     stop("'..' not allowed in subdir")
@@ -136,8 +47,14 @@ runUrl <- function(url, filetype = NULL, subdir = NULL, port = NULL,
     stop("Unknown file extension.")
 
   message("Downloading ", url)
-  filePath <- tempfile('shinyapp', fileext=fileext)
-  fileDir  <- tempfile('shinyapp')
+  if (is.null(destdir)) {
+    filePath <- tempfile('shinyapp', fileext = fileext)
+    fileDir  <- tempfile('shinyapp')
+  } else {
+    fileDir <- destdir
+    filePath <- paste(destdir, fileext)
+  }
+
   dir.create(fileDir, showWarnings = FALSE)
   if (download(url, filePath, mode = "wb", quiet = TRUE) != 0)
     stop("Failed to download URL ", url)
@@ -154,14 +71,79 @@ runUrl <- function(url, filetype = NULL, subdir = NULL, port = NULL,
     untar2(filePath, exdir = fileDir)
 
   } else if (fileext == ".zip") {
-    first <- as.character(unzip(filePath, list=TRUE)$Name)[1]
-    unzip(filePath, exdir = fileDir)
+    first <- as.character(utils::unzip(filePath, list=TRUE)$Name)[1]
+    utils::unzip(filePath, exdir = fileDir)
+  }
+
+  if(is.null(destdir)){
+    on.exit(unlink(fileDir, recursive = TRUE), add = TRUE)
   }
-  on.exit(unlink(fileDir, recursive = TRUE), add = TRUE)
 
   appdir <- file.path(fileDir, first)
-  if (!file_test('-d', appdir)) appdir <- dirname(appdir)
+  if (!utils::file_test('-d', appdir)) appdir <- dirname(appdir)
 
   if (!is.null(subdir)) appdir <- file.path(appdir, subdir)
-  runApp(appdir, port=port, launch.browser=launch.browser)
+  runApp(appdir, ...)
+}
+
+#' @rdname runUrl
+#' @param gist The identifier of the gist. For example, if the gist is
+#'   https://gist.github.com/jcheng5/3239667, then \code{3239667},
+#'   \code{'3239667'}, and \code{'https://gist.github.com/jcheng5/3239667'} are
+#'   all valid values.
+#' @export
+#' @examples
+#' ## Only run this example in interactive R sessions
+#' if (interactive()) {
+#'   runGist(3239667)
+#'   runGist("https://gist.github.com/jcheng5/3239667")
+#'
+#'   # Old URL format without username
+#'   runGist("https://gist.github.com/3239667")
+#' }
+#'
+runGist <- function(gist, destdir = NULL, ...) {
+
+  gistUrl <- if (is.numeric(gist) || grepl('^[0-9a-f]+$', gist)) {
+    sprintf('https://gist.github.com/%s/download', gist)
+  } else if(grepl('^https://gist.github.com/([^/]+/)?([0-9a-f]+)$', gist)) {
+    paste(gist, '/download', sep='')
+  } else {
+    stop('Unrecognized gist identifier format')
+  }
+
+  runUrl(gistUrl, filetype = ".zip", destdir = destdir, ...)
+}
+
+
+#' @rdname runUrl
+#' @param repo Name of the repository.
+#' @param username GitHub username. If \code{repo} is of the form
+#'   \code{"username/repo"}, \code{username} will be taken from \code{repo}.
+#' @param ref Desired git reference. Could be a commit, tag, or branch name.
+#'   Defaults to \code{"master"}.
+#' @export
+#' @examples
+#' ## Only run this example in interactive R sessions
+#' if (interactive()) {
+#'   runGitHub("shiny_example", "rstudio")
+#'   # or runGitHub("rstudio/shiny_example")
+#'
+#'   # Can run an app from a subdirectory in the repo
+#'   runGitHub("shiny_example", "rstudio", subdir = "inst/shinyapp/")
+#' }
+runGitHub <- function(repo, username = getOption("github.user"),
+                      ref = "master", subdir = NULL, destdir = NULL, ...) {
+
+  if (grepl('/', repo)) {
+    res <- strsplit(repo, '/')[[1]]
+    if (length(res) != 2) stop("'repo' must be of the form 'username/repo'")
+    username <- res[1]
+    repo     <- res[2]
+  }
+
+  url <- paste("https://github.com/", username, "/", repo, "/archive/",
+               ref, ".tar.gz", sep = "")
+
+  runUrl(url, subdir = subdir, destdir = destdir, ...)
 }

R/server-input-handlers.R

@@ -0,0 +1,111 @@
+# Create a map for input handlers and register the defaults.
+inputHandlers <- Map$new()
+
+#' Register an Input Handler
+#'
+#' Adds an input handler for data of this type. When called, Shiny will use the
+#' function provided to refine the data passed back from the client (after being
+#' deserialized by jsonlite) before making it available in the \code{input}
+#' variable of the \code{server.R} file.
+#'
+#' This function will register the handler for the duration of the R process
+#' (unless Shiny is explicitly reloaded). For that reason, the \code{type} used
+#' should be very specific to this package to minimize the risk of colliding
+#' with another Shiny package which might use this data type name. We recommend
+#' the format of "packageName.widgetName".
+#'
+#' Currently Shiny registers the following handlers: \code{shiny.matrix},
+#' \code{shiny.number}, and \code{shiny.date}.
+#'
+#' The \code{type} of a custom Shiny Input widget will be deduced using the
+#' \code{getType()} JavaScript function on the registered Shiny inputBinding.
+#' @param type The type for which the handler should be added -- should be a
+#' single-element character vector.
+#' @param fun The handler function. This is the function that will be used to
+#'   parse the data delivered from the client before it is available in the
+#'   \code{input} variable. The function will be called with the following three
+#'   parameters:
+#'    \enumerate{
+#'      \item{The value of this input as provided by the client, deserialized
+#'      using jsonlite.}
+#'      \item{The \code{shinysession} in which the input exists.}
+#'      \item{The name of the input.}
+#'    }
+#' @param force If \code{TRUE}, will overwrite any existing handler without
+#' warning. If \code{FALSE}, will throw an error if this class already has
+#' a handler defined.
+#' @examples
+#' \dontrun{
+#' # Register an input handler which rounds a input number to the nearest integer
+#' registerInputHandler("mypackage.validint", function(x, shinysession, name) {
+#'   if (is.null(x)) return(NA)
+#'   round(x)
+#' })
+#'
+#' ## On the Javascript side, the associated input binding must have a corresponding getType method:
+#' getType: function(el) {
+#'   return "mypackage.validint";
+#' }
+#'
+#' }
+#' @seealso \code{\link{removeInputHandler}}
+#' @export
+registerInputHandler <- function(type, fun, force=FALSE){
+  if (inputHandlers$containsKey(type) && !force){
+    stop("There is already an input handler for type: ", type)
+  }
+  inputHandlers$set(type, fun)
+}
+
+#' Deregister an Input Handler
+#'
+#' Removes an Input Handler. Rather than using the previously specified handler
+#' for data of this type, the default jsonlite serialization will be used.
+#'
+#' @param type The type for which handlers should be removed.
+#' @return The handler previously associated with this \code{type}, if one
+#'   existed. Otherwise, \code{NULL}.
+#' @seealso \code{\link{registerInputHandler}}
+#' @export
+removeInputHandler <- function(type){
+  inputHandlers$remove(type)
+}
+
+# Takes a list-of-lists and returns a matrix. The lists
+# must all be the same length. NULL is replaced by NA.
+registerInputHandler("shiny.matrix", function(data, ...) {
+  if (length(data) == 0)
+    return(matrix(nrow=0, ncol=0))
+
+  m <- matrix(unlist(lapply(data, function(x) {
+    sapply(x, function(y) {
+      ifelse(is.null(y), NA, y)
+    })
+  })), nrow = length(data[[1]]), ncol = length(data))
+  return(m)
+})
+
+registerInputHandler("shiny.number", function(val, ...){
+  ifelse(is.null(val), NA, val)
+})
+
+registerInputHandler("shiny.date", function(val, ...){
+  # First replace NULLs with NA, then convert to Date vector
+  datelist <- ifelse(lapply(val, is.null), NA, val)
+  as.Date(unlist(datelist))
+})
+
+registerInputHandler("shiny.datetime", function(val, ...){
+  # First replace NULLs with NA, then convert to POSIXct vector
+  times <- lapply(val, function(x) {
+    if (is.null(x)) NA
+    else x
+  })
+  as.POSIXct(unlist(times), origin = "1970-01-01", tz = "UTC")
+})
+
+registerInputHandler("shiny.action", function(val, ...) {
+  # mark up the action button value with a special class so we can recognize it later
+  class(val) <- c(class(val), "shinyActionButtonValue")
+  val
+})

R/server.R

@@ -1,110 +1,7 @@
-#' @include globals.R
+#' @include server-input-handlers.R
 
 appsByToken <- Map$new()
 
-# Create a map for input handlers and register the defaults.
-inputHandlers <- Map$new()
-
-#' Register an Input Handler
-#'
-#' Adds an input handler for data of this type. When called, Shiny will use the
-#' function provided to refine the data passed back from the client (after being
-#' deserialized by RJSONIO) before making it available in the \code{input}
-#' variable of the \code{server.R} file.
-#'
-#' This function will register the handler for the duration of the R process
-#' (unless Shiny is explicitly reloaded). For that reason, the \code{type} used
-#' should be very specific to this package to minimize the risk of colliding
-#' with another Shiny package which might use this data type name. We recommend
-#' the format of "packageName.widgetName".
-#'
-#' Currently Shiny registers the following handlers: \code{shiny.matrix},
-#' \code{shiny.number}, and \code{shiny.date}.
-#'
-#' The \code{type} of a custom Shiny Input widget will be deduced using the
-#' \code{getType()} JavaScript function on the registered Shiny inputBinding.
-#' @param type The type for which the handler should be added -- should be a
-#' single-element character vector.
-#' @param fun The handler function. This is the function that will be used to
-#'   parse the data delivered from the client before it is available in the
-#'   \code{input} variable. The function will be called with the following three
-#'   parameters:
-#'    \enumerate{
-#'      \item{The value of this input as provided by the client, deserialized
-#'      using RJSONIO.}
-#'      \item{The \code{shinysession} in which the input exists.}
-#'      \item{The name of the input.}
-#'    }
-#' @param force If \code{TRUE}, will overwrite any existing handler without
-#' warning. If \code{FALSE}, will throw an error if this class already has
-#' a handler defined.
-#' @examples
-#' \dontrun{
-#' # Register an input handler which rounds a input number to the nearest integer
-#' registerInputHandler("mypackage.validint", function(x, shinysession, name) {
-#'   if (is.null(x)) return(NA)
-#'   round(x)
-#' })
-#'
-#' ## On the Javascript side, the associated input binding must have a corresponding getType method:
-#' getType: function(el) {
-#'   return "mypackage.validint";
-#' }
-#'
-#' }
-#' @seealso \code{\link{removeInputHandler}}
-#' @export
-registerInputHandler <- function(type, fun, force=FALSE){
-  if (inputHandlers$containsKey(type) && !force){
-    stop("There is already an input handler for type: ", type)
-  }
-  inputHandlers$set(type, fun)
-}
-
-#' Deregister an Input Handler
-#'
-#' Removes an Input Handler. Rather than using the previously specified handler
-#' for data of this type, the default RJSONIO serialization will be used.
-#'
-#' @param type The type for which handlers should be removed.
-#' @return The handler previously associated with this \code{type}, if one
-#'   existed. Otherwise, \code{NULL}.
-#' @seealso \code{\link{registerInputHandler}}
-#' @export
-removeInputHandler <- function(type){
-  inputHandlers$remove(type)
-}
-
-# Takes a list-of-lists and returns a matrix. The lists
-# must all be the same length. NULL is replaced by NA.
-registerInputHandler("shiny.matrix", function(data, ...) {
-  if (length(data) == 0)
-    return(matrix(nrow=0, ncol=0))
-
-  m <- matrix(unlist(lapply(data, function(x) {
-    sapply(x, function(y) {
-      ifelse(is.null(y), NA, y)
-    })
-  })), nrow = length(data[[1]]), ncol = length(data))
-  return(m)
-})
-
-registerInputHandler("shiny.number", function(val, ...){
-  ifelse(is.null(val), NA, val)
-})
-
-registerInputHandler("shiny.date", function(val, ...){
-  # First replace NULLs with NA, then convert to Date vector
-  datelist <- ifelse(lapply(val, is.null), NA, val)
-  as.Date(unlist(datelist))
-})
-
-registerInputHandler("shiny.action", function(val, ...) {
-  # mark up the action button value with a special class so we can recognize it later
-  class(val) <- c(class(val), "shinyActionButtonValue")
-  val
-})
-
 # Provide a character representation of the WS that can be used
 # as a key in a Map.
 wsToKey <- function(WS) {
@@ -169,13 +66,6 @@ addResourcePath <- function(prefix, directoryPath) {
 
   existing <- .globals$resources[[prefix]]
 
-  if (!is.null(existing)) {
-    if (!identical(existing$directoryPath, directoryPath)) {
-      warning("Overriding existing prefix ", prefix, " => ",
-              existing$directoryPath)
-    }
-  }
-
   .globals$resources[[prefix]] <- list(directoryPath=directoryPath,
                                        func=staticHandler(directoryPath))
 }
@@ -209,14 +99,15 @@ resourcePathHandler <- function(req) {
 #'
 #' Defines the server-side logic of the Shiny application. This generally
 #' involves creating functions that map user inputs to various kinds of output.
+#' In older versions of Shiny, it was necessary to call \code{shinyServer()} in
+#' the \code{server.R} file, but this is no longer required as of Shiny 0.10.
+#' Now the \code{server.R} file may simply return the appropriate server
+#' function (as the last expression in the code), without calling
+#' \code{shinyServer()}.
 #'
-#' @param func The server function for this application. See the details section
-#'   for more information.
-#'
-#' @details
-#' Call \code{shinyServer} from your application's \code{server.R} file, passing
-#' in a "server function" that provides the server-side logic of your
-#' application.
+#' Call \code{shinyServer} from your application's \code{server.R}
+#' file, passing in a "server function" that provides the server-side logic of
+#' your application.
 #'
 #' The server function will be called when each client (web browser) first loads
 #' the Shiny application's page. It must take an \code{input} and an
@@ -227,6 +118,9 @@ resourcePathHandler <- function(req) {
 #' See the \href{http://rstudio.github.com/shiny/tutorial/}{tutorial} for more
 #' on how to write a server function.
 #'
+#' @param func The server function for this application. See the details section
+#'   for more information.
+#'
 #' @examples
 #' \dontrun{
 #' # A very simple Shiny app that takes a message from the user
@@ -236,6 +130,16 @@ resourcePathHandler <- function(req) {
 #'     toupper(input$message)
 #'   })
 #' })
+#'
+#'
+#' # It is also possible for a server.R file to simply return the function,
+#' # without calling shinyServer().
+#' # For example, the server.R file could contain just the following:
+#' function(input, output, session) {
+#'   output$uppercase <- renderText({
+#'     toupper(input$message)
+#'   })
+#' }
 #' }
 #'
 #' @export
@@ -249,8 +153,12 @@ decodeMessage <- function(data) {
     packBits(rawToBits(data[pos:(pos+3)]), type='integer')
   }
 
-  if (readInt(1) != 0x01020202L)
-    return(fromJSON(rawToChar(data), asText=TRUE, simplify=FALSE))
+  if (readInt(1) != 0x01020202L) {
+    # Treat message as UTF-8
+    charData <- rawToChar(data)
+    Encoding(charData) <- 'UTF-8'
+    return(jsonlite::fromJSON(charData, simplifyVector=FALSE))
+  }
 
   i <- 5
   parts <- list()
@@ -278,7 +186,7 @@ createAppHandlers <- function(httpHandlers, serverFuncSource) {
   # This value, if non-NULL, must be present on all HTTP and WebSocket
   # requests as the Shiny-Shared-Secret header or else access will be
   # denied (403 response for HTTP, and instant close for websocket).
-  sharedSecret <- getOption('shiny.sharedSecret', NULL)
+  sharedSecret <- getOption('shiny.sharedSecret')
 
   appHandlers <- list(
     http = joinHandlers(c(
@@ -294,150 +202,161 @@ createAppHandlers <- function(httpHandlers, serverFuncSource) {
         return(TRUE)
       }
 
+      if (!is.null(getOption("shiny.observer.error", NULL))) {
+        warning(
+          call. = FALSE,
+          "options(shiny.observer.error) is no longer supported; please unset it!"
+        )
+        stopApp()
+      }
+
       shinysession <- ShinySession$new(ws)
       appsByToken$set(shinysession$token, shinysession)
       shinysession$setShowcase(.globals$showcaseDefault)
 
-      ws$onMessage(function(binary, msg) {
-        # To ease transition from websockets-based code. Should remove once we're stable.
-        if (is.character(msg))
-          msg <- charToRaw(msg)
+      messageHandler <- function(binary, msg) {
+        withReactiveDomain(shinysession, {
+          # To ease transition from websockets-based code. Should remove once we're stable.
+          if (is.character(msg))
+            msg <- charToRaw(msg)
 
-        if (getOption('shiny.trace', FALSE)) {
-          if (binary)
-            message("RECV ", '$$binary data$$')
-          else
-            message("RECV ", rawToChar(msg))
-        }
+          if (isTRUE(getOption('shiny.trace'))) {
+            if (binary)
+              message("RECV ", '$$binary data$$')
+            else
+              message("RECV ", rawToChar(msg))
+          }
 
-        if (identical(charToRaw("\003\xe9"), msg))
-          return()
+          if (identical(charToRaw("\003\xe9"), msg))
+            return()
 
-        msg <- decodeMessage(msg)
+          msg <- decodeMessage(msg)
 
-        # Do our own list simplifying here. sapply/simplify2array give names to
-        # character vectors, which is rarely what we want.
-        if (!is.null(msg$data)) {
-          for (name in names(msg$data)) {
-            val <- msg$data[[name]]
+          # Do our own list simplifying here. sapply/simplify2array give names to
+          # character vectors, which is rarely what we want.
+          if (!is.null(msg$data)) {
+            for (name in names(msg$data)) {
+              val <- msg$data[[name]]
 
-            splitName <- strsplit(name, ':')[[1]]
-            if (length(splitName) > 1) {
-              msg$data[[name]] <- NULL
+              splitName <- strsplit(name, ':')[[1]]
+              if (length(splitName) > 1) {
+                msg$data[[name]] <- NULL
 
-              if (!inputHandlers$containsKey(splitName[[2]])){
-                # No input handler registered for this type
-                stop("No handler registered for for type ", name)
-              }
+                if (!inputHandlers$containsKey(splitName[[2]])){
+                  # No input handler registered for this type
+                  stop("No handler registered for for type ", name)
+                }
 
-              msg$data[[ splitName[[1]] ]] <-
+                msg$data[[ splitName[[1]] ]] <-
                   inputHandlers$get(splitName[[2]])(
-                      val,
-                      shinysession,
-                      splitName[[1]] )
-            }
-            else if (is.list(val) && is.null(names(val))) {
-              val_flat <- unlist(val, recursive = TRUE)
+                    val,
+                    shinysession,
+                    splitName[[1]] )
+              }
+              else if (is.list(val) && is.null(names(val))) {
+                val_flat <- unlist(val, recursive = TRUE)
 
-              if (is.null(val_flat)) {
-                # This is to assign NULL instead of deleting the item
-                msg$data[name] <- list(NULL)
-              } else {
-                msg$data[[name]] <- val_flat
+                if (is.null(val_flat)) {
+                  # This is to assign NULL instead of deleting the item
+                  msg$data[name] <- list(NULL)
+                } else {
+                  msg$data[[name]] <- val_flat
+                }
               }
             }
           }
-        }
 
-        switch(
-          msg$method,
-          init = {
+          switch(
+            msg$method,
+            init = {
 
-            serverFunc <- serverFuncSource()
-            if (!identicalFunctionBodies(serverFunc, appvars$server)) {
-              appvars$server <- serverFunc
-              if (!is.null(appvars$server))
-              {
-                # Tag this function as the Shiny server function. A debugger may use this
-                # tag to give this function special treatment.
-                # It's very important that it's appvars$server itself and NOT a copy that
-                # is invoked, otherwise new breakpoints won't be picked up.
-                attr(appvars$server, "shinyServerFunction") <- TRUE
-                registerDebugHook("server", appvars, "Server Function")
+              serverFunc <- withReactiveDomain(NULL, serverFuncSource())
+              if (!identicalFunctionBodies(serverFunc, appvars$server)) {
+                appvars$server <- serverFunc
+                if (!is.null(appvars$server))
+                {
+                  # Tag this function as the Shiny server function. A debugger may use this
+                  # tag to give this function special treatment.
+                  # It's very important that it's appvars$server itself and NOT a copy that
+                  # is invoked, otherwise new breakpoints won't be picked up.
+                  attr(appvars$server, "shinyServerFunction") <- TRUE
+                  registerDebugHook("server", appvars, "Server Function")
+                }
               }
-            }
 
-            # Check for switching into/out of showcase mode
-            if (.globals$showcaseOverride &&
-                exists(".clientdata_url_search", where = msg$data)) {
-              mode <- showcaseModeOfQuerystring(msg$data$.clientdata_url_search)
-              if (!is.null(mode))
-                shinysession$setShowcase(mode)
-            }
+              # Check for switching into/out of showcase mode
+              if (.globals$showcaseOverride &&
+                  exists(".clientdata_url_search", where = msg$data)) {
+                mode <- showcaseModeOfQuerystring(msg$data$.clientdata_url_search)
+                if (!is.null(mode))
+                  shinysession$setShowcase(mode)
+              }
 
-            shinysession$manageInputs(msg$data)
+              shinysession$manageInputs(msg$data)
 
-            # The client tells us what singletons were rendered into
-            # the initial page
-            if (!is.null(msg$data$.clientdata_singletons)) {
-              shinysession$singletons <<- strsplit(
-                msg$data$.clientdata_singletons, ',')[[1]]
-            }
+              # The client tells us what singletons were rendered into
+              # the initial page
+              if (!is.null(msg$data$.clientdata_singletons)) {
+                shinysession$singletons <- strsplit(
+                  msg$data$.clientdata_singletons, ',')[[1]]
+              }
 
-            local({
-              args <- list(
-                input=shinysession$input,
-                output=.createOutputWriter(shinysession))
+              local({
+                args <- argsForServerFunc(serverFunc, shinysession)
 
-              # The clientData and session arguments are optional; check if
-              # each exists
-              if ('clientData' %in% names(formals(serverFunc)))
-                args$clientData <- shinysession$clientData
-
-              if ('session' %in% names(formals(serverFunc)))
-                args$session <- shinysession$session
-
-              withReactiveDomain(shinysession$session, {
-                do.call(appvars$server, args)
+                withReactiveDomain(shinysession, {
+                  do.call(
+                    # No corresponding ..stacktraceoff; the server func is pure
+                    # user code
+                    wrapFunctionLabel(appvars$server, "server",
+                      ..stacktraceon = TRUE
+                    ),
+                    args
+                  )
+                })
               })
-            })
-          },
-          update = {
-            shinysession$manageInputs(msg$data)
-          },
-          shinysession$dispatch(msg)
-        )
-        shinysession$manageHiddenOutputs()
+            },
+            update = {
+              shinysession$manageInputs(msg$data)
+            },
+            shinysession$dispatch(msg)
+          )
+          shinysession$manageHiddenOutputs()
 
-        if (exists(".shiny__stdout", globalenv()) &&
-            exists("HTTP_GUID", ws$request)) {
-          # safe to assume we're in shiny-server
-          shiny_stdout <- get(".shiny__stdout", globalenv())
+          if (exists(".shiny__stdout", globalenv()) &&
+              exists("HTTP_GUID", ws$request)) {
+            # safe to assume we're in shiny-server
+            shiny_stdout <- get(".shiny__stdout", globalenv())
 
-          # eNter a flushReact
-          writeLines(paste("_n_flushReact ", get("HTTP_GUID", ws$request),
-                           " @ ", sprintf("%.3f", as.numeric(Sys.time())),
-                           sep=""), con=shiny_stdout)
-          flush(shiny_stdout)
+            # eNter a flushReact
+            writeLines(paste("_n_flushReact ", get("HTTP_GUID", ws$request),
+              " @ ", sprintf("%.3f", as.numeric(Sys.time())),
+              sep=""), con=shiny_stdout)
+            flush(shiny_stdout)
 
-          flushReact()
+            flushReact()
 
-          # eXit a flushReact
-          writeLines(paste("_x_flushReact ", get("HTTP_GUID", ws$request),
-                           " @ ", sprintf("%.3f", as.numeric(Sys.time())),
-                           sep=""), con=shiny_stdout)
-          flush(shiny_stdout)
-        } else {
-          flushReact()
-        }
-        lapply(appsByToken$values(), function(shinysession) {
-          shinysession$flushOutput()
-          NULL
+            # eXit a flushReact
+            writeLines(paste("_x_flushReact ", get("HTTP_GUID", ws$request),
+              " @ ", sprintf("%.3f", as.numeric(Sys.time())),
+              sep=""), con=shiny_stdout)
+            flush(shiny_stdout)
+          } else {
+            flushReact()
+          }
+          lapply(appsByToken$values(), function(shinysession) {
+            shinysession$flushOutput()
+            NULL
+          })
         })
+      }
+      ws$onMessage(function(binary, msg) {
+        # If unhandled errors occur, make sure they get properly logged
+        withLogErrors(messageHandler(binary, msg))
       })
 
       ws$onClose(function() {
-        shinysession$close()
+        shinysession$wsClosed()
         appsByToken$remove(shinysession$token)
       })
 
@@ -447,6 +366,26 @@ createAppHandlers <- function(httpHandlers, serverFuncSource) {
   return(appHandlers)
 }
 
+# Determine what arguments should be passed to this serverFunc. All server funcs
+# must take input and output, but clientData (obsolete) and session are
+# optional.
+argsForServerFunc <- function(serverFunc, session) {
+  args <- list(input = session$input, output = .createOutputWriter(session))
+
+  paramNames <- names(formals(serverFunc))
+
+  # The clientData and session arguments are optional; check if
+  # each exists
+
+  if ("clientData" %in% paramNames)
+    args$clientData <- session$clientData
+
+  if ("session" %in% paramNames)
+    args$session <- session
+
+  args
+}
+
 getEffectiveBody <- function(func) {
   # Note: NULL values are OK. isS4(NULL) returns FALSE, body(NULL)
   # returns NULL.
@@ -463,7 +402,7 @@ identicalFunctionBodies <- function(a, b) {
 handlerManager <- HandlerManager$new()
 
 addSubApp <- function(appObj, autoRemove = TRUE) {
-  path <- sprintf("/%s", createUniqueId(16))
+  path <- createUniqueId(16, "/app")
   appHandlers <- createAppHandlers(appObj$httpHandler, appObj$serverFuncSource)
 
   # remove the leading / from the path so a relative path is returned
@@ -539,8 +478,8 @@ serviceApp <- function() {
 
 #' Run Shiny Application
 #'
-#' Runs a Shiny application. This function normally does not return; interrupt
-#' R to stop the application (usually by pressing Ctrl+C or Esc).
+#' Runs a Shiny application. This function normally does not return; interrupt R
+#' to stop the application (usually by pressing Ctrl+C or Esc).
 #'
 #' The host parameter was introduced in Shiny 0.9.0. Its default value of
 #' \code{"127.0.0.1"} means that, contrary to previous versions of Shiny, only
@@ -548,11 +487,20 @@ serviceApp <- function() {
 #' clients to connect, use the value \code{"0.0.0.0"} instead (which was the
 #' value that was hard-coded into Shiny in 0.8.0 and earlier).
 #'
-#' @param appDir The directory of the application. Should contain
-#'   \code{server.R}, plus, either \code{ui.R} or a \code{www} directory that
-#'   contains the file \code{index.html}. Defaults to the working directory.
-#' @param port The TCP port that the application should listen on. Defaults to
-#'   choosing a random port.
+#' @param appDir The application to run. Should be one of the following:
+#'   \itemize{
+#'   \item A directory containing \code{server.R}, plus, either \code{ui.R} or
+#'    a \code{www} directory that contains the file \code{index.html}.
+#'   \item A directory containing \code{app.R}.
+#'   \item An \code{.R} file containing a Shiny application, ending with an
+#'    expression that produces a Shiny app object.
+#'   \item A list with \code{ui} and \code{server} components.
+#'   \item A Shiny app object created by \code{\link{shinyApp}}.
+#'   }
+#' @param port The TCP port that the application should listen on. If the
+#'   \code{port} is not specified, and the \code{shiny.port} option is set (with
+#'   \code{options(shiny.port = XX)}), then that port will be used. Otherwise,
+#'   use a random port.
 #' @param launch.browser If true, the system's default web browser will be
 #'   launched automatically after the app is started. Defaults to true in
 #'   interactive sessions only. This value of this parameter can also be a
@@ -567,8 +515,8 @@ serviceApp <- function() {
 #'   the value \code{"showcase"}, shows application code and metadata from a
 #'   \code{DESCRIPTION} file in the application directory alongside the
 #'   application. If set to \code{"normal"}, displays the application normally.
-#'   Defaults to \code{"auto"}, which displays the application in the mode
-#'   given in its \code{DESCRIPTION} file, if any.
+#'   Defaults to \code{"auto"}, which displays the application in the mode given
+#'   in its \code{DESCRIPTION} file, if any.
 #'
 #' @examples
 #' \dontrun{
@@ -577,22 +525,37 @@ serviceApp <- function() {
 #'
 #' # Start app in a subdirectory called myapp
 #' runApp("myapp")
+#' }
+#'
+#' ## Only run this example in interactive R sessions
+#' if (interactive()) {
+#'   # Apps can be run without a server.r and ui.r file
+#'   runApp(list(
+#'     ui = bootstrapPage(
+#'       numericInput('n', 'Number of obs', 100),
+#'       plotOutput('plot')
+#'     ),
+#'     server = function(input, output) {
+#'       output$plot <- renderPlot({ hist(runif(input$n)) })
+#'     }
+#'   ))
 #'
 #'
-#' # Apps can be run without a server.r and ui.r file
-#' runApp(list(
-#'   ui = bootstrapPage(
-#'     numericInput('n', 'Number of obs', 100),
-#'     plotOutput('plot')
-#'   ),
-#'   server = function(input, output) {
-#'     output$plot <- renderPlot({ hist(runif(input$n)) })
-#'   }
-#' ))
+#'   # Running a Shiny app object
+#'   app <- shinyApp(
+#'     ui = bootstrapPage(
+#'       numericInput('n', 'Number of obs', 100),
+#'       plotOutput('plot')
+#'     ),
+#'     server = function(input, output) {
+#'       output$plot <- renderPlot({ hist(runif(input$n)) })
+#'     }
+#'   )
+#'   runApp(app)
 #' }
 #' @export
 runApp <- function(appDir=getwd(),
-                   port=NULL,
+                   port=getOption('shiny.port'),
                    launch.browser=getOption('shiny.launch.browser',
                                             interactive()),
                    host=getOption('shiny.host', '127.0.0.1'),
@@ -618,7 +581,7 @@ runApp <- function(appDir=getwd(),
     # SHINY_SERVER_VERSION, those will return "" which is considered less than
     # any valid version.
     ver <- Sys.getenv('SHINY_SERVER_VERSION')
-    if (compareVersion(ver, .shinyServerMinVersion) < 0) {
+    if (utils::compareVersion(ver, .shinyServerMinVersion) < 0) {
       warning('Shiny Server v', .shinyServerMinVersion,
               ' or later is required; please upgrade!')
     }
@@ -632,9 +595,17 @@ runApp <- function(appDir=getwd(),
   # If appDir specifies a path, and display mode is specified in the
   # DESCRIPTION file at that path, apply it here.
   if (is.character(appDir)) {
-    desc <- file.path.ci(appDir, "DESCRIPTION")
+    # if appDir specifies a .R file (single-file Shiny app), look for the
+    # DESCRIPTION in the parent directory
+    desc <- file.path.ci(
+      if (tolower(tools::file_ext(appDir)) == "r")
+        dirname(appDir)
+      else
+        appDir, "DESCRIPTION")
     if (file.exists(desc)) {
-      settings <- read.dcf(desc)
+      con <- file(desc, encoding = checkEncoding(desc))
+      on.exit(close(con), add = TRUE)
+      settings <- read.dcf(con)
       if ("DisplayMode" %in% colnames(settings)) {
         mode <- settings[1,"DisplayMode"]
         if (mode == "Showcase") {
@@ -685,10 +656,12 @@ runApp <- function(appDir=getwd(),
   }
 
   appParts <- as.shiny.appobj(appDir)
-  if (!is.null(appParts$onStart))
-    appParts$onStart()
+  # Set up the onEnd before we call onStart, so that it gets called even if an
+  # error happens in onStart.
   if (!is.null(appParts$onEnd))
     on.exit(appParts$onEnd(), add = TRUE)
+  if (!is.null(appParts$onStart))
+    appParts$onStart()
 
   server <- startApp(appParts, port, host, quiet)
 
@@ -715,16 +688,27 @@ runApp <- function(appDir=getwd(),
     callAppHook("onAppStop", appUrl)
   }, add = TRUE)
 
+  .globals$reterror <- NULL
   .globals$retval <- NULL
   .globals$stopped <- FALSE
-  shinyCallingHandlers(
-    while (!.globals$stopped) {
-      serviceApp()
-      Sys.sleep(0.001)
-    }
+  # Top-level ..stacktraceoff..; matches with ..stacktraceon in observe(),
+  # reactive(), Callbacks$invoke(), and others
+  ..stacktraceoff..(
+    captureStackTraces(
+      while (!.globals$stopped) {
+        serviceApp()
+        Sys.sleep(0.001)
+      }
+    )
   )
 
-  return(.globals$retval)
+  if (isTRUE(.globals$reterror)) {
+    stop(.globals$retval)
+  }
+  else if (.globals$retval$visible)
+    .globals$retval$value
+  else
+    invisible(.globals$retval$value)
 }
 
 #' Stop the currently running Shiny app
@@ -736,8 +720,25 @@ runApp <- function(appDir=getwd(),
 #'   \code{\link{runApp}}.
 #'
 #' @export
-stopApp <- function(returnValue = NULL) {
-  .globals$retval <- returnValue
+stopApp <- function(returnValue = invisible()) {
+  # reterror will indicate whether retval is an error (i.e. it should be passed
+  # to stop() when the serviceApp loop stops) or a regular value (in which case
+  # it should simply be returned with the appropriate visibility).
+  .globals$reterror <- FALSE
+  ..stacktraceoff..(
+    tryCatch(
+      {
+        captureStackTraces(
+          .globals$retval <- withVisible(..stacktraceon..(force(returnValue)))
+        )
+      },
+      error = function(e) {
+        .globals$retval <- e
+        .globals$reterror <- TRUE
+      }
+    )
+  )
+
   .globals$stopped <- TRUE
   httpuv::interrupt()
 }
@@ -760,15 +761,16 @@ stopApp <- function(returnValue = NULL) {
 #'   code or commentary.
 #'
 #' @examples
-#' \dontrun{
-#' # List all available examples
-#' runExample()
+#' ## Only run this example in interactive R sessions
+#' if (interactive()) {
+#'   # List all available examples
+#'   runExample()
 #'
-#' # Run one of the examples
-#' runExample("01_hello")
+#'   # Run one of the examples
+#'   runExample("01_hello")
 #'
-#' # Print the directory containing the code for all examples
-#' system.file("examples", package="shiny")
+#'   # Print the directory containing the code for all examples
+#'   system.file("examples", package="shiny")
 #' }
 #' @export
 runExample <- function(example=NA,
@@ -799,3 +801,135 @@ runExample <- function(example=NA,
            display.mode = display.mode)
   }
 }
+
+#' Run a gadget
+#'
+#' Similar to \code{runApp}, but handles \code{input$cancel} automatically, and
+#' if running in RStudio, defaults to viewing the app in the Viewer pane.
+#'
+#' @param app Either a Shiny app object as created by
+#'   \code{\link[=shiny]{shinyApp}} et al, or, a UI object.
+#' @param server Ignored if \code{app} is a Shiny app object; otherwise, passed
+#'   along to \code{shinyApp} (i.e. \code{shinyApp(ui = app, server = server)}).
+#' @param port See \code{\link[=shiny]{runApp}}.
+#' @param viewer Specify where the gadget should be displayed--viewer pane,
+#'   dialog window, or external browser--by passing in a call to one of the
+#'   \code{\link{viewer}} functions.
+#' @param stopOnCancel If \code{TRUE} (the default), then an \code{observeEvent}
+#'   is automatically created that handles \code{input$cancel} by calling
+#'   \code{stopApp()} with an error. Pass \code{FALSE} if you want to handle
+#'   \code{input$cancel} yourself.
+#' @return The value returned by the gadget.
+#'
+#' @examples
+#' \dontrun{
+#' library(shiny)
+#'
+#' ui <- fillPage(...)
+#'
+#' server <- function(input, output, session) {
+#'   ...
+#' }
+#'
+#' # Either pass ui/server as separate arguments...
+#' runGadget(ui, server)
+#'
+#' # ...or as a single app object
+#' runGadget(shinyApp(ui, server))
+#' }
+#'
+#' @export
+runGadget <- function(app, server = NULL, port = getOption("shiny.port"),
+  viewer = paneViewer(), stopOnCancel = TRUE) {
+
+  if (!is.shiny.appobj(app)) {
+    app <- shinyApp(app, server)
+  }
+
+  if (isTRUE(stopOnCancel)) {
+    app <- decorateServerFunc(app, function(input, output, session) {
+      observeEvent(input$cancel, {
+        stopApp(stop("User cancel", call. = FALSE))
+      })
+    })
+  }
+
+  if (is.null(viewer)) {
+    viewer <- utils::browseURL
+  }
+
+  shiny::runApp(app, port = port, launch.browser = viewer)
+}
+
+# Add custom functionality to a Shiny app object's server func
+decorateServerFunc <- function(appobj, serverFunc) {
+  origServerFuncSource <- appobj$serverFuncSource
+  appobj$serverFuncSource <- function() {
+    origServerFunc <- origServerFuncSource()
+    function(input, output, session) {
+      serverFunc(input, output, session)
+
+      # The clientData and session arguments are optional; check if
+      # each exists
+      args <- argsForServerFunc(origServerFunc, session)
+      do.call(origServerFunc, args)
+    }
+  }
+  appobj
+}
+
+#' Viewer options
+#'
+#' Use these functions to control where the gadget is displayed in RStudio (or
+#' other R environments that emulate RStudio's viewer pane/dialog APIs). If
+#' viewer APIs are not available in the current R environment, then the gadget
+#' will be displayed in the system's default web browser (see
+#' \code{\link[utils]{browseURL}}).
+#'
+#' @return A function that takes a single \code{url} parameter, suitable for
+#'   passing as the \code{viewer} argument of \code{\link{runGadget}}.
+#'
+#' @rdname viewer
+#' @name viewer
+NULL
+
+#' @param minHeight The minimum height (in pixels) desired to show the gadget in
+#'   the viewer pane. If a positive number, resize the pane if necessary to show
+#'   at least that many pixels. If \code{NULL}, use the existing viewer pane
+#'   size. If \code{"maximize"}, use the maximum available vertical space.
+#' @rdname viewer
+#' @export
+paneViewer <- function(minHeight = NULL) {
+  viewer <- getOption("viewer")
+  if (is.null(viewer)) {
+    utils::browseURL
+  } else {
+    function(url) {
+      viewer(url, minHeight)
+    }
+  }
+}
+
+#' @param dialogName The window title to display for the dialog.
+#' @param width,height The desired dialog width/height, in pixels.
+#' @rdname viewer
+#' @export
+dialogViewer <- function(dialogName, width = 600, height = 600) {
+  viewer <- getOption("shinygadgets.showdialog")
+  if (is.null(viewer)) {
+    utils::browseURL
+  } else {
+    function(url) {
+      viewer(dialogName, url, width = width, height = height)
+    }
+  }
+}
+
+#' @param browser See \code{\link[utils]{browseURL}}.
+#' @rdname viewer
+#' @export
+browserViewer <- function(browser = getOption("browser")) {
+  function(url) {
+    utils::browseURL(url, browser = browser)
+  }
+}

R/shinyui.R

@@ -1,143 +1,5 @@
 #' @include globals.R
-
-#' @rdname builder
-#' @export
-p <- function(...) tags$p(...)
-
-#' @rdname builder
-#' @export
-h1 <- function(...) tags$h1(...)
-
-#' @rdname builder
-#' @export
-h2 <- function(...) tags$h2(...)
-
-#' @rdname builder
-#' @export
-h3 <- function(...) tags$h3(...)
-
-#' @rdname builder
-#' @export
-h4 <- function(...) tags$h4(...)
-
-#' @rdname builder
-#' @export
-h5 <- function(...) tags$h5(...)
-
-#' @rdname builder
-#' @export
-h6 <- function(...) tags$h6(...)
-
-#' @rdname builder
-#' @export
-a <- function(...) tags$a(...)
-
-#' @rdname builder
-#' @export
-br <- function(...) tags$br(...)
-
-#' @rdname builder
-#' @export
-div <- function(...) tags$div(...)
-
-#' @rdname builder
-#' @export
-span <- function(...) tags$span(...)
-
-#' @rdname builder
-#' @export
-pre <- function(...) tags$pre(...)
-
-#' @rdname builder
-#' @export
-code <- function(...) tags$code(...)
-
-#' @rdname builder
-#' @export
-img <- function(...) tags$img(...)
-
-#' @rdname builder
-#' @export
-strong <- function(...) tags$strong(...)
-
-#' @rdname builder
-#' @export
-em <- function(...) tags$em(...)
-
-#' @rdname builder
-#' @export
-hr <- function(...) tags$hr(...)
-
-#' Include Content From a File
-#'
-#' Include HTML, text, or rendered Markdown into a \link[=shinyUI]{Shiny UI}.
-#'
-#' These functions provide a convenient way to include an extensive amount of
-#' HTML, textual, Markdown, CSS, or JavaScript content, rather than using a
-#' large literal R string.
-#'
-#' @note \code{includeText} escapes its contents, but does no other processing.
-#'   This means that hard breaks and multiple spaces will be rendered as they
-#'   usually are in HTML: as a single space character. If you are looking for
-#'   preformatted text, wrap the call with \code{\link{pre}}, or consider using
-#'   \code{includeMarkdown} instead.
-#'
-#' @note The \code{includeMarkdown} function requires the \code{markdown}
-#'   package.
-#'
-#' @param path The path of the file to be included. It is highly recommended to
-#'   use a relative path (the base path being the Shiny application directory),
-#'   not an absolute path.
-#'
-#' @rdname include
-#' @name include
-#' @aliases includeHTML
-#' @export
-includeHTML <- function(path) {
-  dependsOnFile(path)
-  lines <- readLines(path, warn=FALSE, encoding='UTF-8')
-  return(HTML(paste(lines, collapse='\r\n')))
-}
-
-#' @rdname include
-#' @export
-includeText <- function(path) {
-  dependsOnFile(path)
-  lines <- readLines(path, warn=FALSE, encoding='UTF-8')
-  return(paste(lines, collapse='\r\n'))
-}
-
-#' @rdname include
-#' @export
-includeMarkdown <- function(path) {
-  library(markdown)
-
-  dependsOnFile(path)
-  html <- markdown::markdownToHTML(path, fragment.only=TRUE)
-  Encoding(html) <- 'UTF-8'
-  return(HTML(html))
-}
-
-#' @param ... Any additional attributes to be applied to the generated tag.
-#' @rdname include
-#' @export
-includeCSS <- function(path, ...) {
-  dependsOnFile(path)
-  lines <- readLines(path, warn=FALSE, encoding='UTF-8')
-  args <- list(...)
-  if (is.null(args$type))
-    args$type <- 'text/css'
-  return(do.call(tags$style,
-                 c(list(HTML(paste(lines, collapse='\r\n'))), args)))
-}
-
-#' @rdname include
-#' @export
-includeScript <- function(path, ...) {
-  dependsOnFile(path)
-  lines <- readLines(path, warn=FALSE, encoding='UTF-8')
-  return(tags$script(HTML(paste(lines, collapse='\r\n')), ...))
-}
+NULL
 
 #' Load the MathJax library and typeset math expressions
 #'
@@ -152,95 +14,53 @@ includeScript <- function(path, ...) {
 #' # now we can just write "static" content without withMathJax()
 #' div("more math here $$\\sqrt{2}$$")
 withMathJax <- function(...) {
-  path <- 'https://c328740.ssl.cf1.rackcdn.com/mathjax/latest/MathJax.js?config=TeX-AMS-MML_HTMLorMML'
+  path <- 'https://cdn.mathjax.org/mathjax/latest/MathJax.js?config=TeX-AMS-MML_HTMLorMML'
   tagList(
     tags$head(
       singleton(tags$script(src = path, type = 'text/javascript'))
     ),
     ...,
-    tags$script(HTML('MathJax.Hub.Queue(["Typeset", MathJax.Hub]);'))
+    tags$script(HTML('if (window.MathJax) MathJax.Hub.Queue(["Typeset", MathJax.Hub]);'))
   )
 }
 
-#' Include Content Only Once
-#'
-#' Use \code{singleton} to wrap contents (tag, text, HTML, or lists) that should
-#' be included in the generated document only once, yet may appear in the
-#' document-generating code more than once. Only the first appearance of the
-#' content (in document order) will be used. Useful for custom components that
-#' have JavaScript files or stylesheets.
-#'
-#' @param x A \code{\link{tag}}, text, \code{\link{HTML}}, or list.
-#'
-#' @export
-singleton <- function(x) {
-  class(x) <- c(class(x), 'shiny.singleton')
-  return(x)
-}
-
 renderPage <- function(ui, connection, showcase=0) {
+  # If the ui is a NOT complete document (created by htmlTemplate()), then do some
+  # preprocessing and make sure it's a complete document.
+  if (!inherits(ui, "html_document")) {
+    if (showcase > 0)
+      ui <- showcaseUI(ui)
 
-  if (showcase > 0)
-    ui <- tagList(tags$head(showcaseHead()), ui)
+    # Wrap ui in body tag if it doesn't already have a single top-level body tag.
+    if (!(inherits(ui, "shiny.tag") && ui$name == "body"))
+      ui <- tags$body(ui)
 
-  result <- renderTags(ui)
-
-  deps <- c(
-    list(
-      html_dependency("jquery", "1.11.0", "shared", script = "jquery.js"),
-      html_dependency("shiny", packageVersion("shiny"), "shared",
-        script = "shiny.js", stylesheet = "shiny.css")
-    ),
-    result$dependencies
-  )
-  deps <- lapply(deps, createWebDependency)
-  depStr <- paste(sapply(deps, function(dep) {
-    sprintf("%s[%s]", dep$name, dep$version)
-  }), collapse = ";")
-  depHtml <- html_dependencies_as_character(deps)
-
-  # write preamble
-  writeLines(c('<!DOCTYPE html>',
-               '<html>',
-               '<head>',
-               '  <meta http-equiv="Content-Type" content="text/html; charset=utf-8"/>',
-               sprintf('  <script type="application/shiny-singletons">%s</script>',
-                       paste(result$singletons, collapse = ',')
-               ),
-               sprintf('  <script type="application/html-dependencies">%s</script>',
-                       depStr
-               ),
-               depHtml
-              ),
-              con = connection)
-  writeLines(c(result$head,
-               '</head>',
-               '<body>',
-               recursive=TRUE),
-             con = connection)
-
-  if (showcase > 0) {
-    # in showcase mode, emit containing elements and app HTML
-    writeLines(as.character(showcaseBody(result$html)),
-               con = connection)
-  } else {
-    # in normal mode, write UI html directly to connection
-    writeLines(result$html, con = connection)
+    # Put the body into the default template
+    ui <- htmlTemplate(
+      system.file("template", "default.html", package = "shiny"),
+      body = ui
+    )
   }
 
-  # write end document
-  writeLines(c('</body>',
-               '</html>'),
-             con = connection)
+  shiny_deps <- list(
+    htmlDependency("json2", "2014.02.04", c(href="shared"), script = "json2-min.js"),
+    htmlDependency("jquery", "1.11.3", c(href="shared"), script = "jquery.min.js"),
+    htmlDependency("babel-polyfill", "6.7.2", c(href="shared"), script = "babel-polyfill.min.js"),
+    htmlDependency("shiny", utils::packageVersion("shiny"), c(href="shared"),
+      script = if (getOption("shiny.minified", TRUE)) "shiny.min.js" else "shiny.js",
+      stylesheet = "shiny.css")
+  )
+  html <- renderDocument(ui, shiny_deps, processDep = createWebDependency)
+  writeUTF8(html, con = connection)
 }
 
 #' Create a Shiny UI handler
 #'
 #' Historically this function was used in ui.R files to register a user
-#' interface with Shiny. It is no longer required; simply ensure that the last
-#' expression to be returned from ui.R is a user interface. This function is
-#' kept for backwards compatibility with older applications. It returns the
-#' value that is passed to it.
+#' interface with Shiny. It is no longer required as of Shiny 0.10; simply
+#' ensure that the last expression to be returned from ui.R is a user interface.
+#' This function is kept for backwards compatibility with older applications. It
+#' returns the value that is passed to it.
 #'
 #' @param ui A user interace definition
 #' @return The user interface definition, without modifications or side effects.
@@ -251,7 +71,7 @@ shinyUI <- function(ui) {
   ui
 }
 
-uiHttpHandler <- function(ui, path = "/") {
+uiHttpHandler <- function(ui, uiPattern = "^/$") {
 
   force(ui)
 
@@ -259,10 +79,10 @@ uiHttpHandler <- function(ui, path = "/") {
     if (!identical(req$REQUEST_METHOD, 'GET'))
       return(NULL)
 
-    if (req$PATH_INFO != path)
+    if (!isTRUE(grepl(uiPattern, req$PATH_INFO)))
       return(NULL)
 
-    textConn <- textConnection(NULL, "w")
+    textConn <- file(open = "w+")
     on.exit(close(textConn))
 
     showcaseMode <- .globals$showcaseDefault
@@ -272,32 +92,21 @@ uiHttpHandler <- function(ui, path = "/") {
         showcaseMode <- mode
     }
     uiValue <- if (is.function(ui)) {
-      if (length(formals(ui)) > 0)
-        ui(req)
-      else
-        ui()
-    }
-    else
+      if (length(formals(ui)) > 0) {
+        # No corresponding ..stacktraceoff.., this is pure user code
+        ..stacktraceon..(ui(req))
+      } else {
+        # No corresponding ..stacktraceoff.., this is pure user code
+        ..stacktraceon..(ui())
+      }
+    } else {
       ui
+    }
+    if (is.null(uiValue))
+      return(NULL)
+
     renderPage(uiValue, textConn, showcaseMode)
-    html <- paste(textConnectionValue(textConn), collapse='\n')
-    return(httpResponse(200, content=html))
+    html <- paste(readLines(textConn, encoding = 'UTF-8'), collapse='\n')
+    return(httpResponse(200, content=enc2utf8(html)))
   }
 }
-
-#' Return HTML dependencies provided by Shiny
-#'
-#' By default, Shiny supplies some framework scripts when it renders a page.
-#' \code{getProvidedHtmlDependencies} returns a list of those provided objects.
-#'
-#' @return A list of objects of type \code{html_dependency}, one per dependency
-#'
-#' @export
-getProvidedHtmlDependencies <- function() {
-  list(structure(
-    list(name = "jquery",
-         version = "1.11.0",
-         path = system.file("www/shared/jquery.js", package="shiny"),
-         script = "jquery.js"),
-    class = "html_dependency"))
-}

R/shinywrappers.R

@@ -16,158 +16,26 @@ globalVariables('func')
 #'
 #' @export
 markRenderFunction <- function(uiFunc, renderFunc) {
-  class(renderFunc) <- c("shiny.render.function", "function")
-  attr(renderFunc, "outputFunc") <- uiFunc
-  renderFunc
+  structure(renderFunc,
+            class      = c("shiny.render.function", "function"),
+            outputFunc = uiFunc)
 }
 
-useRenderFunction <- function(renderFunc) {
+useRenderFunction <- function(renderFunc, inline = FALSE) {
   outputFunction <- attr(renderFunc, "outputFunc")
-  id <- createUniqueId(8)
+  id <- createUniqueId(8, "out")
   o <- getDefaultReactiveDomain()$output
   if (!is.null(o))
     o[[id]] <- renderFunc
-  return(outputFunction(id))
+  if (is.logical(formals(outputFunction)[["inline"]])) {
+    outputFunction(id, inline = inline)
+  } else outputFunction(id)
 }
 
-#' Plot Output
-#'
-#' Renders a reactive plot that is suitable for assigning to an \code{output}
-#' slot.
-#'
-#' The corresponding HTML output tag should be \code{div} or \code{img} and have
-#' the CSS class name \code{shiny-plot-output}.
-#'
-#' @seealso For more details on how the plots are generated, and how to control
-#'   the output, see \code{\link{plotPNG}}.
-#'
-#' @param expr An expression that generates a plot.
-#' @param width The width of the rendered plot, in pixels; or \code{'auto'} to
-#'   use the \code{offsetWidth} of the HTML element that is bound to this plot.
-#'   You can also pass in a function that returns the width in pixels or
-#'   \code{'auto'}; in the body of the function you may reference reactive
-#'   values and functions.
-#' @param height The height of the rendered plot, in pixels; or \code{'auto'} to
-#'   use the \code{offsetHeight} of the HTML element that is bound to this plot.
-#'   You can also pass in a function that returns the width in pixels or
-#'   \code{'auto'}; in the body of the function you may reference reactive
-#'   values and functions.
-#' @param res Resolution of resulting plot, in pixels per inch. This value is
-#'   passed to \code{\link{png}}. Note that this affects the resolution of PNG
-#'   rendering in R; it won't change the actual ppi of the browser.
-#' @param ... Arguments to be passed through to \code{\link[grDevices]{png}}.
-#'   These can be used to set the width, height, background color, etc.
-#' @param env The environment in which to evaluate \code{expr}.
-#' @param quoted Is \code{expr} a quoted expression (with \code{quote()})? This
-#'   is useful if you want to save an expression in a variable.
-#' @param func A function that generates a plot (deprecated; use \code{expr}
-#'   instead).
-#'
 #' @export
-renderPlot <- function(expr, width='auto', height='auto', res=72, ...,
-                       env=parent.frame(), quoted=FALSE, func=NULL) {
-  if (!is.null(func)) {
-    shinyDeprecated(msg="renderPlot: argument 'func' is deprecated. Please use 'expr' instead.")
-  } else {
-    installExprFunction(expr, "func", env, quoted)
-  }
-
-  args <- list(...)
-
-  if (is.function(width))
-    widthWrapper <- reactive({ width() })
-  else
-    widthWrapper <- NULL
-
-  if (is.function(height))
-    heightWrapper <- reactive({ height() })
-  else
-    heightWrapper <- NULL
-
-  # If renderPlot isn't going to adapt to the height of the div, then the
-  # div needs to adapt to the height of renderPlot. By default, plotOutput
-  # sets the height to 400px, so to make it adapt we need to override it
-  # with NULL.
-  outputFunc <- if (identical(height, 'auto'))
-    plotOutput
-  else
-    function(outputId) plotOutput(outputId, height = NULL)
-
-  return(markRenderFunction(outputFunc, function(shinysession, name, ...) {
-    if (!is.null(widthWrapper))
-      width <- widthWrapper()
-    if (!is.null(heightWrapper))
-      height <- heightWrapper()
-
-    # Note that these are reactive calls. A change to the width and height
-    # will inherently cause a reactive plot to redraw (unless width and
-    # height were explicitly specified).
-    prefix <- 'output_'
-    if (width == 'auto')
-      width <- shinysession$clientData[[paste(prefix, name, '_width', sep='')]];
-    if (height == 'auto')
-      height <- shinysession$clientData[[paste(prefix, name, '_height', sep='')]];
-
-    if (is.null(width) || is.null(height) || width <= 0 || height <= 0)
-      return(NULL)
-
-    # Resolution multiplier
-    pixelratio <- shinysession$clientData$pixelratio
-    if (is.null(pixelratio))
-      pixelratio <- 1
-
-    coordmap <- NULL
-    plotFunc <- function() {
-      # Actually perform the plotting
-      result <- withVisible(func())
-      if (result$visible) {
-        # Use capture.output to squelch printing to the actual console; we
-        # are only interested in plot output
-        capture.output(print(result$value))
-      }
-
-      # Now capture some graphics device info before we close it
-      usrCoords <- par('usr')
-      usrBounds <- usrCoords
-      if (par('xlog')) {
-        usrBounds[c(1,2)] <- 10 ^ usrBounds[c(1,2)]
-      }
-      if (par('ylog')) {
-        usrBounds[c(3,4)] <- 10 ^ usrBounds[c(3,4)]
-      }
-
-      coordmap <<- list(
-        usr = c(
-          left = usrCoords[1],
-          right = usrCoords[2],
-          bottom = usrCoords[3],
-          top = usrCoords[4]
-        ),
-        # The bounds of the plot area, in DOM pixels
-        bounds = c(
-          left = grconvertX(usrBounds[1], 'user', 'nfc') * width,
-          right = grconvertX(usrBounds[2], 'user', 'nfc') * width,
-          bottom = (1-grconvertY(usrBounds[3], 'user', 'nfc')) * height,
-          top = (1-grconvertY(usrBounds[4], 'user', 'nfc')) * height
-        ),
-        log = c(
-          x = par('xlog'),
-          y = par('ylog')
-        ),
-        pixelratio = pixelratio
-      )
-    }
-
-    outfile <- do.call(plotPNG, c(plotFunc, width=width*pixelratio,
-                                  height=height*pixelratio, res=res*pixelratio, args))
-    on.exit(unlink(outfile))
-
-    # Return a list of attributes for the img
-    return(list(
-      src=shinysession$fileUrl(name, outfile, contentType='image/png'),
-      width=width, height=height, coordmap=coordmap
-    ))
-  }))
+#' @method as.tags shiny.render.function
+as.tags.shiny.render.function <- function(x, ..., inline = FALSE) {
+  useRenderFunction(x, inline = inline)
 }
 
 #' Image file output
@@ -271,11 +139,7 @@ renderImage <- function(expr, env=parent.frame(), quoted=FALSE,
     }
 
     # If contentType not specified, autodetect based on extension
-    if (is.null(imageinfo$contentType)) {
-      contentType <- getContentType(sub('^.*\\.', '', basename(imageinfo$src)))
-    } else {
-      contentType <- imageinfo$contentType
-    }
+    contentType <- imageinfo$contentType %OR% getContentType(imageinfo$src)
 
     # Extra values are everything in imageinfo except 'src' and 'contentType'
     extra_attr <- imageinfo[!names(imageinfo) %in% c('src', 'contentType')]
@@ -287,51 +151,6 @@ renderImage <- function(expr, env=parent.frame(), quoted=FALSE,
 }
 
 
-#' Table Output
-#'
-#' Creates a reactive table that is suitable for assigning to an \code{output}
-#' slot.
-#'
-#' The corresponding HTML output tag should be \code{div} and have the CSS class
-#' name \code{shiny-html-output}.
-#'
-#' @param expr An expression that returns an R object that can be used with
-#'   \code{\link[xtable]{xtable}}.
-#' @param ... Arguments to be passed through to \code{\link[xtable]{xtable}} and
-#'   \code{\link[xtable]{print.xtable}}.
-#' @param env The environment in which to evaluate \code{expr}.
-#' @param quoted Is \code{expr} a quoted expression (with \code{quote()})? This
-#'   is useful if you want to save an expression in a variable.
-#' @param func A function that returns an R object that can be used with
-#'   \code{\link[xtable]{xtable}} (deprecated; use \code{expr} instead).
-#'
-#' @export
-renderTable <- function(expr, ..., env=parent.frame(), quoted=FALSE, func=NULL) {
-  if (!is.null(func)) {
-    shinyDeprecated(msg="renderTable: argument 'func' is deprecated. Please use 'expr' instead.")
-  } else {
-    installExprFunction(expr, "func", env, quoted)
-  }
-
-  markRenderFunction(tableOutput, function() {
-    classNames <- getOption('shiny.table.class', 'data table table-bordered table-condensed')
-    data <- func()
-
-    if (is.null(data) || identical(data, data.frame()))
-      return("")
-
-    return(paste(
-      capture.output(
-        print(xtable(data, ...),
-              type='html',
-              html.table.attributes=paste('class="',
-                                          htmlEscape(classNames, TRUE),
-                                          '"',
-                                          sep=''), ...)),
-      collapse="\n"))
-  })
-}
-
 #' Printable Output
 #'
 #' Makes a reactive version of the given function that captures any printed
@@ -374,7 +193,7 @@ renderPrint <- function(expr, env = parent.frame(), quoted = FALSE, func = NULL,
   markRenderFunction(verbatimTextOutput, function() {
     op <- options(width = width)
     on.exit(options(op), add = TRUE)
-    paste(capture.output(func()), collapse = "\n")
+    paste(utils::capture.output(func()), collapse = "\n")
   })
 }
 
@@ -414,7 +233,7 @@ renderText <- function(expr, env=parent.frame(), quoted=FALSE, func=NULL) {
 
   markRenderFunction(textOutput, function() {
     value <- func()
-    return(paste(capture.output(cat(value)), collapse="\n"))
+    return(paste(utils::capture.output(cat(value)), collapse="\n"))
   })
 }
 
@@ -457,18 +276,7 @@ renderUI <- function(expr, env=parent.frame(), quoted=FALSE, func=NULL) {
     if (is.null(result) || length(result) == 0)
       return(NULL)
 
-    result <- takeSingletons(result, shinysession$singletons, desingleton=FALSE)$ui
-    result <- surroundSingletons(result)
-    dependencies <- lapply(getNewestDeps(findDependencies(result)), createWebDependency)
-    names(dependencies) <- NULL
-
-    # renderTags returns a list with head, singletons, and html
-    output <- list(
-      html = doRenderTags(result),
-      deps = dependencies
-    )
-
-    return(output)
+    processDeps(result, shinysession)
   })
 }
 
@@ -530,7 +338,9 @@ downloadHandler <- function(filename, content, contentType=NA) {
 #' \code{"AsIs"} (usually returned from \code{\link{I}()}) will be evaluated in
 #' JavaScript. This is useful when the type of the option value is not supported
 #' in JSON, e.g., a JavaScript function, which can be obtained by evaluating a
-#' character string.
+#' character string. Note this only applies to the root-level elements of the
+#' options list, and the \code{I()} notation does not work for lower-level
+#' elements in the list.
 #' @param expr An expression that returns a data frame or a matrix.
 #' @param options A list of initialization options to be passed to DataTables,
 #'   or a function to return such a list.
@@ -538,35 +348,118 @@ downloadHandler <- function(filename, content, contentType=NA) {
 #'   frequent search requests).
 #' @param callback A JavaScript function to be applied to the DataTable object.
 #'   This is useful for DataTables plug-ins, which often require the DataTable
-#'   instance to be available (\url{http://datatables.net/extras/}).
+#'   instance to be available (\url{http://datatables.net/extensions/}).
+#' @param escape Whether to escape HTML entities in the table: \code{TRUE} means
+#'   to escape the whole table, and \code{FALSE} means not to escape it.
+#'   Alternatively, you can specify numeric column indices or column names to
+#'   indicate which columns to escape, e.g. \code{1:5} (the first 5 columns),
+#'   \code{c(1, 3, 4)}, or \code{c(-1, -3)} (all columns except the first and
+#'   third), or \code{c('Species', 'Sepal.Length')}.
 #' @references \url{http://datatables.net}
+#' @note This function only provides the server-side version of DataTables
+#'   (using R to process the data object on the server side). There is a
+#'   separate package \pkg{DT} (\url{https://github.com/rstudio/DT}) that allows
+#'   you to create both server-side and client-side DataTables, and supports
+#'   additional DataTables features. Consider using \code{DT::renderDataTable()}
+#'   and \code{DT::dataTableOutput()} (see
+#'   \url{http://rstudio.github.io/DT/shiny.html} for more information).
 #' @export
 #' @inheritParams renderPlot
-#' @examples  # pass a callback function to DataTables using I()
-#' renderDataTable(iris,
-#'   options = list(
-#'     iDisplayLength = 5,
-#'     fnInitComplete = I("function(oSettings, json) {alert('Done.');}")
+#' @examples
+#' ## Only run this example in interactive R sessions
+#' if (interactive()) {
+#'   # pass a callback function to DataTables using I()
+#'   shinyApp(
+#'     ui = fluidPage(
+#'       fluidRow(
+#'         column(12,
+#'           dataTableOutput('table')
+#'         )
+#'       )
+#'     ),
+#'     server = function(input, output) {
+#'       output$table <- renderDataTable(iris,
+#'         options = list(
+#'           pageLength = 5,
+#'           initComplete = I("function(settings, json) {alert('Done.');}")
+#'         )
+#'       )
+#'     }
 #'   )
-#' )
+#' }
 renderDataTable <- function(expr, options = NULL, searchDelay = 500,
-                            callback = 'function(oTable) {}',
+                            callback = 'function(oTable) {}', escape = TRUE,
                             env = parent.frame(), quoted = FALSE) {
   installExprFunction(expr, "func", env, quoted)
 
   markRenderFunction(dataTableOutput, function(shinysession, name, ...) {
-    res <- checkAsIs(if (is.function(options)) options() else options)
+    if (is.function(options)) options <- options()
+    options <- checkDT9(options)
+    res <- checkAsIs(options)
     data <- func()
     if (length(dim(data)) != 2) return() # expects a rectangular data object
+    if (is.data.frame(data)) data <- as.data.frame(data)
     action <- shinysession$registerDataObj(name, data, dataTablesJSON)
+    colnames <- colnames(data)
+    # if escape is column names, turn names to numeric indices
+    if (is.character(escape)) {
+      escape <- stats::setNames(seq_len(ncol(data)), colnames)[escape]
+      if (any(is.na(escape)))
+        stop("Some column names in the 'escape' argument not found in data")
+    }
+    colnames[escape] <- htmlEscape(colnames[escape])
+    if (!is.logical(escape)) {
+      if (!is.numeric(escape))
+        stop("'escape' must be TRUE, FALSE, or a numeric vector, or column names")
+      escape <- paste(escape, collapse = ',')
+    }
     list(
-      colnames = colnames(data), action = action, options = res$options,
+      colnames = colnames, action = action, options = res$options,
       evalOptions = if (length(res$eval)) I(res$eval), searchDelay = searchDelay,
-      callback = paste(callback, collapse = '\n')
+      callback = paste(callback, collapse = '\n'), escape = escape
     )
   })
 }
 
+# a data frame containing the DataTables 1.9 and 1.10 names
+DT10Names <- function() {
+  rbind(
+    utils::read.table(
+      system.file('www/shared/datatables/upgrade1.10.txt', package = 'shiny'),
+      stringsAsFactors = FALSE
+    ),
+    c('aoColumns', 'Removed')  # looks like an omission on the upgrade guide
+  )
+}
+
+# check DataTables 1.9.x options, and give instructions for upgrading to 1.10.x
+checkDT9 <- function(options) {
+  nms <- names(options)
+  if (length(nms) == 0L) return(options)
+  DT10 <- DT10Names()
+  # e.g. the top level option name for oLanguage.sSearch should be oLanguage
+  i <- nms %in% gsub('[.].*', '', DT10[, 1])
+  if (!any(i)) return(options)  # did not see old option names, ready to go!
+  msg <- paste(
+    'shiny (>= 0.10.2) has upgraded DataTables from 1.9.4 to 1.10.2, ',
+    'and DataTables 1.10.x uses different parameter names with 1.9.x. ',
+    'Please follow the upgrade guide https://datatables.net/upgrade/1.10-convert',
+    ' to change your DataTables parameter names:\n\n',
+    paste(utils::formatUL(nms[i]), collapse = '\n'), '\n', sep = ''
+  )
+  j <- gsub('[.].*', '', DT10[, 1]) %in% nms
+  # I cannot help you upgrade automatically in these cases, so I have to stop
+  if (any(grepl('[.]', DT10[j, 1])) || any(grepl('[.]', DT10[j, 2]))) stop(msg)
+  warning(msg)
+  nms10 <- DT10[match(nms[i], DT10[, 1]), 2]
+  if (any(nms10 == 'Removed')) stop(
+    "These parameters have been removed in DataTables 1.10.x:\n\n",
+    paste(utils::formatUL(nms[i][nms10 == 'Removed']), collapse = '\n'),
+    "\n\n", msg
+  )
+  names(options)[i] <- nms10
+  options
+}
 
 # Deprecated functions ------------------------------------------------------
 

R/showcase.R

@@ -31,13 +31,11 @@ licenseLink <- function(licenseName) {
 showcaseHead <- function() {
 
   deps  <- list(
-    html_dependency("jqueryui", "1.10.4", "shared/jqueryui/1.10.4",
+    htmlDependency("jqueryui", "1.11.4", c(href="shared/jqueryui"),
       script = "jquery-ui.min.js"),
-    html_dependency("showdown", "0.3.1", "shared/showdown/compressed",
+    htmlDependency("showdown", "0.3.1", c(href="shared/showdown/compressed"),
       script = "showdown.js"),
-    html_dependency("font-awesome", "4.0.3", "shared/font-awesome",
-      stylesheet = "css/font-awesome.min.css"),
-    html_dependency("highlight.js", "6.2", "shared/highlight",
+    htmlDependency("highlight.js", "6.2", c(href="shared/highlight"),
       script = "highlight.pack.js")
   )
 
@@ -50,11 +48,11 @@ showcaseHead <- function() {
          href="shared/shiny-showcase.css"),
     if (file.exists(mdfile))
       script(type="text/markdown", id="showcase-markdown-content",
-        paste(readLines(mdfile, warn = FALSE), collapse="\n"))
+        paste(readUTF8(mdfile), collapse="\n"))
     else ""
   ))
 
-  return(attach_dependency(html, deps))
+  return(attachDependencies(html, deps))
 }
 
 # Returns tags containing the application metadata (title and author) in
@@ -62,7 +60,7 @@ showcaseHead <- function() {
 appMetadata <- function(desc) {
   cols <- colnames(desc)
   if ("Title" %in% cols)
-    with(tags, h4(class="muted shiny-showcase-apptitle", desc[1,"Title"],
+    with(tags, h4(class="text-muted shiny-showcase-apptitle", desc[1,"Title"],
       if ("Author" %in% cols) small(
         br(), "by",
         if ("AuthorUrl" %in% cols)
@@ -85,12 +83,13 @@ showcaseCodeTabs <- function(codeLicense) {
   rFiles <- list.files(pattern = "\\.[rR]$")
   with(tags, div(id="showcase-code-tabs",
     a(id="showcase-code-position-toggle",
-      class="btn btn-default btn-small",
+      class="btn btn-default btn-sm",
       onclick="toggleCodePosition()",
-      i(class="fa fa-level-up", "show with app")),
+      icon("level-up"),
+      "show with app"),
     ul(class="nav nav-tabs",
        lapply(rFiles, function(rFile) {
-         li(class=if (tolower(rFile) == "server.r") "active" else "",
+         li(class=if (tolower(rFile) %in% c("app.r", "server.r")) "active" else "",
             a(href=paste("#", gsub(".", "_", rFile, fixed=TRUE),
                          "_code", sep=""),
               "data-toggle"="tab", rFile))
@@ -98,7 +97,8 @@ showcaseCodeTabs <- function(codeLicense) {
     div(class="tab-content", id="showcase-code-content",
         lapply(rFiles, function(rFile) {
           div(class=paste("tab-pane",
-                          if (tolower(rFile) == "server.r") " active" else "",
+                          if (tolower(rFile) %in% c("app.r", "server.r")) " active"
+                          else "",
                           sep=""),
               id=paste(gsub(".", "_", rFile, fixed=TRUE),
                        "_code", sep=""),
@@ -106,8 +106,7 @@ showcaseCodeTabs <- function(codeLicense) {
                   # we need to prevent the indentation of <code> ... </code>
                   HTML(format(tags$code(
                     class="language-r",
-                    paste(readLines(file.path.ci(getwd(), rFile), warn=FALSE),
-                          collapse="\n")
+                    paste(readUTF8(file.path.ci(getwd(), rFile)), collapse="\n")
                   ), indent = FALSE))))
         })),
     codeLicense))
@@ -121,22 +120,24 @@ showcaseAppInfo <- function() {
   readmemd <- file.path.ci(getwd(), "Readme.md")
   hasReadme <- file.exists(readmemd)
   if (hasDesc) {
-    desc <- read.dcf(descfile)
+    con <- textConnection(readUTF8(descfile))
+    on.exit(close(con), add = TRUE)
+    desc <- read.dcf(con)
   }
   with(tags,
     div(class="container-fluid shiny-code-container well",
         id="showcase-well",
-        div(class="row-fluid",
+        div(class="row",
           if (hasDesc || hasReadme) {
-            div(id="showcase-app-metadata", class="span4",
+            div(id="showcase-app-metadata", class="col-sm-4",
                 if (hasDesc) appMetadata(desc) else "",
                 if (hasReadme) div(id="readme-md"))
           } else "",
           div(id="showcase-code-inline",
-              class=if (hasReadme || hasDesc) "span8" else "span10 offset1",
+              class=if (hasReadme || hasDesc) "col-sm-8" else "col-sm-10 col-sm-offset-1",
               showcaseCodeTabs(
                 if (hasDesc && "License" %in% colnames(desc)) {
-                  small(class="showcase-code-license muted",
+                  small(class="showcase-code-license text-muted",
                         "Code license: ",
                         licenseLink(desc[1,"License"]))
                 } else "")))))
@@ -149,7 +150,7 @@ showcaseBody <- function(htmlBody) {
     table(id="showcase-app-code",
           tr(td(id="showcase-app-container",
                 class="showcase-app-container-expanded",
-                HTML(htmlBody),
+                htmlBody,
              td(id="showcase-sxs-code",
                 class="showcase-sxs-code-collapsed")))),
     showcaseAppInfo()))
@@ -160,3 +161,19 @@ setShowcaseDefault <- function(showcaseDefault) {
   .globals$showcaseDefault <- showcaseDefault
   .globals$showcaseOverride <- as.logical(showcaseDefault)
 }
+
+
+# Given a UI tag/tagList, wrap it in appropriate tags for showcase mode.
+showcaseUI <- function(ui) {
+  # If top-level tag is a body, replace its children with children wrapped in
+    # showcase stuff.
+  if (inherits(ui, "shiny.tag") && ui$name == "body") {
+    ui$children <- showcaseUI(ui$children)
+    return(ui)
+  }
+
+  tagList(
+    tags$head(showcaseHead()),
+    showcaseBody(ui)
+  )
+}

R/slider.R

@@ -1,143 +0,0 @@
-hasDecimals <- function(value) {
-  truncatedValue <- round(value)
-  return (!identical(value, truncatedValue))
-}
-
-#' @rdname sliderInput
-#'
-#' @param interval The interval, in milliseconds, between each animation step.
-#' @param loop \code{TRUE} to automatically restart the animation when it
-#'   reaches the end.
-#' @param playButton Specifies the appearance of the play button. Valid values
-#'   are a one-element character vector (for a simple text label), an HTML tag
-#'   or list of tags (using \code{\link{tag}} and friends), or raw HTML (using
-#'   \code{\link{HTML}}).
-#' @param pauseButton Similar to \code{playButton}, but for the pause button.
-#'
-#' @export
-animationOptions <- function(interval=1000,
-                             loop=FALSE,
-                             playButton=NULL,
-                             pauseButton=NULL) {
-  list(interval=interval,
-       loop=loop,
-       playButton=playButton,
-       pauseButton=pauseButton)
-}
-
-# Create a new slider control (list of slider input element and the script
-# tag used to configure it). This is a lower level control that should
-# be wrapped in an "input" construct (e.g. sliderInput in bootstrap.R)
-#
-# this is a wrapper for: https://github.com/egorkhmelev/jslider
-# (www/shared/slider contains js, css, and img dependencies)
-slider <- function(inputId, min, max, value, step = NULL, ...,
-                   round=FALSE, format='#,##0.#####', locale='us',
-                   ticks=TRUE, animate=FALSE, width=NULL) {
-  # validate inputId
-  inputId <- as.character(inputId)
-  if (!is.character(inputId))
-    stop("inputId not specified")
-
-  # validate numeric inputs
-  if (!is.numeric(value) || !is.numeric(min) || !is.numeric(max))
-    stop("min, max, and value must all be numeric values")
-  else if (min(value) < min)
-    stop(paste("slider initial value", value,
-               "is less than the specified minimum"))
-  else if (max(value) > max)
-    stop(paste("slider initial value", value,
-               "is greater than the specified maximum"))
-  else if (min > max)
-    stop(paste("slider maximum is greater than minimum"))
-  else if (!is.null(step)) {
-    if (!is.numeric(step))
-      stop("step is not a numeric value")
-    if (step > (max - min))
-      stop("step is greater than range")
-  }
-
-  # step
-  range <- max - min
-  if (is.null(step)) {
-    # short range or decimals means continuous decimal
-    if (range < 2 || hasDecimals(min) || hasDecimals(max))
-      step <- range / 250 # ~ one step per pixel
-    else
-      step = 1
-  }
-
-  # Default state is to not have ticks
-  if (identical(ticks, TRUE)) {
-    # Automatic ticks
-    tickCount <- (range / step) + 1
-    if (tickCount <= 26)
-      ticks <- paste(rep('|', floor(tickCount)), collapse=';')
-    else {
-      ticks <- NULL
-#       # This is a smarter auto-tick algorithm, but to be truly useful
-#       # we need jslider to be able to space ticks irregularly
-#       tickSize <- 10^(floor(log10(range/0.39)))
-#       if ((range / tickSize) == floor(range / tickSize)) {
-#         ticks <- paste(rep('|', (range / tickSize) + 1), collapse=';')
-#       }
-#       else {
-#         ticks <- NULL
-#       }
-    }
-  }
-  else if (is.numeric(ticks) && length(ticks) == 1) {
-    # Use n ticks
-    ticks <- paste(rep('|', ticks), collapse=';')
-  }
-  else if (length(ticks) > 1 && (is.numeric(ticks) || is.character(ticks))) {
-    # Explicit ticks
-    ticks <- paste(ticks, collapse=';')
-  }
-  else {
-    ticks <- NULL
-  }
-
-  # build slider
-  dep <- html_dependency(name = "jslider", version = "1",
-    path = "shared/slider",
-    script = "js/jquery.slider.min.js",
-    stylesheet = "css/jquery.slider.min.css"
-  )
-  sliderFragment <- list(
-    attach_dependency(
-      tags$input(
-        id=inputId, type="slider",
-        name=inputId, value=paste(value, collapse=';'), class="jslider",
-        'data-from'=min, 'data-to'=max, 'data-step'=step,
-        'data-skin'='plastic', 'data-round'=round, 'data-locale'=locale,
-        'data-format'=format, 'data-scale'=ticks,
-        'data-smooth'=FALSE,
-        'data-width'=validateCssUnit(width)
-      ),
-      dep
-    )
-  )
-
-  if (identical(animate, TRUE))
-    animate <- animationOptions()
-
-  if (!is.null(animate) && !identical(animate, FALSE)) {
-    if (is.null(animate$playButton))
-      animate$playButton <- 'Play'
-    if (is.null(animate$pauseButton))
-      animate$pauseButton <- 'Pause'
-
-    sliderFragment[[length(sliderFragment)+1]] <-
-      tags$div(class='slider-animate-container',
-               tags$a(href='#',
-                      class='slider-animate-button',
-                      'data-target-id'=inputId,
-                      'data-interval'=animate$interval,
-                      'data-loop'=animate$loop,
-                      tags$span(class='play', animate$playButton),
-                      tags$span(class='pause', animate$pauseButton)))
-  }
-
-  return(tagList(sliderFragment))
-}

R/stack.R

@@ -0,0 +1,70 @@
+# A Stack object backed by a list. The backing list will grow or shrink as
+# the stack changes in size.
+Stack <- R6Class(
+  'Stack',
+  portable = FALSE,
+  class = FALSE,
+  public = list(
+
+    initialize = function(init = 20L) {
+      # init is the initial size of the list. It is also used as the minimum
+      # size of the list as it shrinks.
+      private$stack <- vector("list", init)
+      private$init <- init
+    },
+
+    push = function(..., .list = NULL) {
+      args <- c(list(...), .list)
+      new_size <- count + length(args)
+
+      # Grow if needed; double in size
+      while (new_size > length(stack)) {
+        stack[length(stack) * 2] <<- list(NULL)
+      }
+      stack[count + seq_along(args)] <<- args
+      count <<- new_size
+
+      invisible(self)
+    },
+
+    pop = function() {
+      if (count == 0L)
+        return(NULL)
+
+      value <- stack[[count]]
+      stack[count] <<- list(NULL)
+      count <<- count - 1L
+
+      # Shrink list if < 1/4 of the list is used, down to a minimum size of `init`
+      len <- length(stack)
+      if (len > init && count < len/4) {
+        new_len <- max(init, ceiling(len/2))
+        stack <<- stack[seq_len(new_len)]
+      }
+
+      value
+    },
+
+    peek = function() {
+      if (count == 0L)
+        return(NULL)
+      stack[[count]]
+    },
+
+    size = function() {
+      count
+    },
+
+    # Return the entire stack as a list, where the first item in the list is the
+    # oldest item in the stack, and the last item is the most recently added.
+    as_list = function() {
+      stack[seq_len(count)]
+    }
+  ),
+
+  private = list(
+    stack = NULL,   # A list that holds the items
+    count = 0L,     # Current number of items in the stack
+    init = 20L      # Initial and minimum size of the stack
+  )
+)

R/tags.R

@@ -1,637 +0,0 @@
-
-
-htmlEscape <- local({
-  .htmlSpecials <- list(
-    `&` = '&amp;',
-    `<` = '&lt;',
-    `>` = '&gt;'
-  )
-  .htmlSpecialsPattern <- paste(names(.htmlSpecials), collapse='|')
-  .htmlSpecialsAttrib <- c(
-    .htmlSpecials,
-    `'` = '&#39;',
-    `"` = '&quot;',
-    `\r` = '&#13;',
-    `\n` = '&#10;'
-  )
-  .htmlSpecialsPatternAttrib <- paste(names(.htmlSpecialsAttrib), collapse='|')
-
-  function(text, attribute=TRUE) {
-    pattern <- if(attribute)
-      .htmlSpecialsPatternAttrib
-    else
-      .htmlSpecialsPattern
-
-    # Short circuit in the common case that there's nothing to escape
-    if (!any(grepl(pattern, text)))
-      return(text)
-
-    specials <- if(attribute)
-      .htmlSpecialsAttrib
-    else
-      .htmlSpecials
-
-    for (chr in names(specials)) {
-      text <- gsub(chr, specials[[chr]], text, fixed=TRUE)
-    }
-
-    return(text)
-  }
-})
-
-isTag <- function(x) {
-  inherits(x, "shiny.tag")
-}
-
-#' @export
-print.shiny.tag <- function(x, ...) {
-  print(as.character(x), ...)
-  invisible(x)
-}
-
-# indent can be numeric to indicate an initial indent level,
-# or FALSE to suppress
-#' @export
-format.shiny.tag <- function(x, ..., singletons = character(0), indent = 0) {
-  as.character(renderTags(x, singletons = singletons, indent = indent)$html)
-}
-
-#' @export
-as.character.shiny.tag <- function(x, ...) {
-  renderTags(x)$html
-}
-
-#' @export
-print.shiny.tag.list <- print.shiny.tag
-
-#' @export
-format.shiny.tag.list <- format.shiny.tag
-
-#' @export
-as.character.shiny.tag.list <- as.character.shiny.tag
-
-#' @export
-print.html <- function(x, ...) {
-  cat(x, "\n")
-  invisible(x)
-}
-
-#' @export
-format.html <- function(x, ...) {
-  as.character(x)
-}
-
-normalizeText <- function(text) {
-  if (!is.null(attr(text, "html")))
-    text
-  else
-    htmlEscape(text, attribute=FALSE)
-
-}
-
-#' @rdname tag
-#' @export
-tagList <- function(...) {
-  lst <- list(...)
-  class(lst) <- c("shiny.tag.list", "list")
-  return(lst)
-}
-
-#' @rdname tag
-#' @export
-tagAppendAttributes <- function(tag, ...) {
-  tag$attribs <- c(tag$attribs, list(...))
-  tag
-}
-
-#' @rdname tag
-#' @export
-tagAppendChild <- function(tag, child) {
-  tag$children[[length(tag$children)+1]] <- child
-  tag
-}
-
-#' @rdname tag
-#' @export
-tagAppendChildren <- function(tag, ..., list = NULL) {
-  tag$children <- c(tag$children, c(list(...), list))
-  tag
-}
-
-#' @rdname tag
-#' @export
-tagSetChildren <- function(tag, ..., list = NULL) {
-  tag$children <- c(list(...), list)
-  tag
-}
-
-#' HTML Tag Object
-#'
-#' \code{tag()} creates an HTML tag definition. Note that all of the valid HTML5
-#' tags are already defined in the \code{\link{tags}} environment so these
-#' functions should only be used to generate additional tags.
-#' \code{tagAppendChild()} and \code{tagList()} are for supporting package
-#' authors who wish to create their own sets of tags; see the contents of
-#' bootstrap.R for examples.
-#' @param _tag_name HTML tag name
-#' @param varArgs List of attributes and children of the element. Named list
-#'   items become attributes, and unnamed list items become children. Valid
-#'   children are tags, single-character character vectors (which become text
-#'   nodes), and raw HTML (see \code{\link{HTML}}). You can also pass lists that
-#'   contain tags, text nodes, and HTML.
-#' @param tag A tag to append child elements to.
-#' @param child A child element to append to a parent tag.
-#' @param ...  Unnamed items that comprise this list of tags.
-#' @param list An optional list of elements. Can be used with or instead of the
-#'   \code{...} items.
-#' @return An HTML tag object that can be rendered as HTML using
-#'   \code{\link{as.character}()}.
-#' @export
-#' @examples
-#' tagList(tags$h1("Title"),
-#'         tags$h2("Header text"),
-#'         tags$p("Text here"))
-#'
-#' # Can also convert a regular list to a tagList (internal data structure isn't
-#' # exactly the same, but when rendered to HTML, the output is the same).
-#' x <- list(tags$h1("Title"),
-#'           tags$h2("Header text"),
-#'           tags$p("Text here"))
-#' tagList(x)
-tag <- function(`_tag_name`, varArgs) {
-  # Get arg names; if not a named list, use vector of empty strings
-  varArgsNames <- names(varArgs)
-  if (is.null(varArgsNames))
-    varArgsNames <- character(length=length(varArgs))
-
-  # Named arguments become attribs, dropping NULL values
-  named_idx <- nzchar(varArgsNames)
-  attribs <- dropNulls(varArgs[named_idx])
-
-  # Unnamed arguments are flattened and added as children.
-  # Use unname() to remove the names attribute from the list, which would
-  # consist of empty strings anyway.
-  children <- unname(varArgs[!named_idx])
-
-  # Return tag data structure
-  structure(
-    list(name = `_tag_name`,
-         attribs = attribs,
-         children = children),
-    class = "shiny.tag"
-  )
-}
-
-tagWrite <- function(tag, textWriter, indent=0, eol = "\n") {
-
-  if (length(tag) == 0)
-    return (NULL)
-
-  # optionally process a list of tags
-  if (!isTag(tag) && is.list(tag)) {
-    tag <- dropNullsOrEmpty(flattenTags(tag))
-    lapply(tag, tagWrite, textWriter, indent)
-    return (NULL)
-  }
-
-  nextIndent <- if (is.numeric(indent)) indent + 1 else indent
-  indent <- if (is.numeric(indent)) indent else 0
-
-  # compute indent text
-  indentText <- paste(rep(" ", indent*2), collapse="")
-
-  # Check if it's just text (may either be plain-text or HTML)
-  if (is.character(tag)) {
-    textWriter(paste(indentText, normalizeText(tag), eol, sep=""))
-    return (NULL)
-  }
-
-  # write tag name
-  textWriter(paste(indentText, "<", tag$name, sep=""))
-
-  # Convert all attribs to chars explicitly; prevents us from messing up factors
-  attribs <- lapply(tag$attribs, as.character)
-  # concatenate attributes
-  # split() is very slow, so avoid it if possible
-  if (anyDuplicated(names(attribs)))
-    attribs <- lapply(split(attribs, names(attribs)), paste, collapse = " ")
-
-  # write attributes
-  for (attrib in names(attribs)) {
-    attribValue <- attribs[[attrib]]
-    if (!is.na(attribValue)) {
-      if (is.logical(attribValue))
-        attribValue <- tolower(attribValue)
-      text <- htmlEscape(attribValue, attribute=TRUE)
-      textWriter(paste(" ", attrib,"=\"", text, "\"", sep=""))
-    }
-    else {
-      textWriter(paste(" ", attrib, sep=""))
-    }
-  }
-
-  # write any children
-  children <- dropNullsOrEmpty(flattenTags(tag$children))
-  if (length(children) > 0) {
-    textWriter(">")
-
-    # special case for a single child text node (skip newlines and indentation)
-    if ((length(children) == 1) && is.character(children[[1]]) ) {
-      textWriter(paste(normalizeText(children[[1]]), "</", tag$name, ">", eol,
-        sep=""))
-    }
-    else {
-      textWriter("\n")
-      for (child in children)
-        tagWrite(child, textWriter, nextIndent)
-      textWriter(paste(indentText, "</", tag$name, ">", eol, sep=""))
-    }
-  }
-  else {
-    # only self-close void elements
-    # (see: http://dev.w3.org/html5/spec/single-page.html#void-elements)
-    if (tag$name %in% c("area", "base", "br", "col", "command", "embed", "hr",
-                        "img", "input", "keygen", "link", "meta", "param",
-                        "source", "track", "wbr")) {
-      textWriter(paste("/>", eol, sep=""))
-    }
-    else {
-      textWriter(paste("></", tag$name, ">", eol, sep=""))
-    }
-  }
-}
-
-doRenderTags <- function(ui, indent = 0) {
-  # Render the body--the bodyHtml variable will be created
-  conn <- file(open="w+")
-  connWriter <- function(text) writeChar(text, conn, eos = NULL)
-  htmlResult <- tryCatch({
-    tagWrite(ui, connWriter, indent)
-    flush(conn)
-    readLines(conn)
-  },
-    finally = close(conn)
-  )
-  return(HTML(paste(htmlResult, collapse = "\n")))
-}
-
-renderTags <- function(ui, singletons = character(0), indent = 0) {
-  # Do singleton and head processing before rendering
-  singletonInfo <- takeSingletons(ui, singletons)
-  headInfo <- takeHeads(singletonInfo$ui)
-  deps <- getNewestDeps(findDependencies(singletonInfo$ui))
-
-  headIndent <- if (is.numeric(indent)) indent + 1 else indent
-  headHtml <- doRenderTags(headInfo$head, indent = headIndent)
-  bodyHtml <- doRenderTags(headInfo$ui, indent = indent)
-
-  return(list(head = headHtml,
-              singletons = singletonInfo$singletons,
-              dependencies = deps,
-              html = bodyHtml))
-}
-
-# Walk a tree of tag objects, rewriting objects according to func.
-# preorder=TRUE means preorder tree traversal, that is, an object
-# should be rewritten before its children.
-rewriteTags <- function(ui, func, preorder) {
-  if (preorder)
-    ui <- func(ui)
-
-  if (isTag(ui)) {
-    ui$children[] <- lapply(ui$children, rewriteTags, func, preorder)
-  } else if (is.list(ui)) {
-    ui[] <- lapply(ui, rewriteTags, func, preorder)
-  }
-
-  if (!preorder)
-    ui <- func(ui)
-
-  return(ui)
-}
-
-# Preprocess a tag object by changing any singleton X into
-# <!--SHINY.SINGLETON[sig]-->X'<!--/SHINY.SINGLETON[sig]-->
-# where sig is the sha1 of X, and X' is X minus the singleton
-# attribute.
-#
-# In the case of nested singletons, outer singletons are processed
-# before inner singletons (otherwise the processing of inner
-# singletons would cause the sha1 of the outer singletons to be
-# different).
-surroundSingletons <- local({
-  surroundSingleton <- function(uiObj) {
-    if (inherits(uiObj, "shiny.singleton")) {
-      sig <- digest(uiObj, "sha1")
-      class(uiObj) <- class(uiObj)[class(uiObj) != "shiny.singleton"]
-      return(tagList(
-        HTML(sprintf("<!--SHINY.SINGLETON[%s]-->", sig)),
-        uiObj,
-        HTML(sprintf("<!--/SHINY.SINGLETON[%s]-->", sig))
-      ))
-    } else {
-      uiObj
-    }
-  }
-
-  function(ui) {
-    rewriteTags(ui, surroundSingleton, TRUE)
-  }
-})
-
-# Given a tag object, apply singleton logic (allow singleton objects
-# to appear no more than once per signature) and return the processed
-# HTML objects and also the list of known singletons.
-takeSingletons <- function(ui, singletons=character(0), desingleton=TRUE) {
-  result <- rewriteTags(ui, function(uiObj) {
-    if (inherits(uiObj, "shiny.singleton")) {
-      sig <- digest(uiObj, "sha1")
-      if (sig %in% singletons)
-        return(NULL)
-      singletons <<- append(singletons, sig)
-      if (desingleton)
-        class(uiObj) <- class(uiObj)[class(uiObj) != "shiny.singleton"]
-      return(uiObj)
-    } else {
-      return(uiObj)
-    }
-  }, TRUE)
-
-  return(list(ui=result, singletons=singletons))
-}
-
-# Given a tag object, extract out any children of tags$head
-# and return them separate from the body.
-takeHeads <- function(ui) {
-  headItems <- list()
-  result <- rewriteTags(ui, function(uiObj) {
-    if (isTag(uiObj) && tolower(uiObj$name) == "head") {
-      headItems <<- append(headItems, uiObj$children)
-      return(NULL)
-    }
-    return(uiObj)
-  }, FALSE)
-
-  return(list(ui=result, head=headItems))
-}
-
-findDependencies <- function(ui) {
-  dep <- attr(ui, "html_dependency")
-  if (!is.null(dep) && inherits(dep, "html_dependency"))
-    dep <- list(dep)
-  children <- if (is.list(ui)) {
-    if (isTag(ui)) {
-      ui$children
-    } else {
-      ui
-    }
-  }
-  childDeps <- unlist(lapply(children, findDependencies), recursive = FALSE)
-  c(childDeps, if (!is.null(dep)) dep)
-}
-
-#' HTML Builder Functions
-#'
-#' Simple functions for constructing HTML documents.
-#'
-#' The \code{tags} environment contains convenience functions for all valid
-#' HTML5 tags. To generate tags that are not part of the HTML5 specification,
-#' you can use the \code{\link{tag}()} function.
-#'
-#' Dedicated functions are available for the most common HTML tags that do not
-#' conflict with common R functions.
-#'
-#' The result from these functions is a tag object, which can be converted using
-#' \code{\link{as.character}()}.
-#'
-#' @name builder
-#' @param ... Attributes and children of the element. Named arguments become
-#'   attributes, and positional arguments become children. Valid children are
-#'   tags, single-character character vectors (which become text nodes), and raw
-#'   HTML (see \code{\link{HTML}}). You can also pass lists that contain tags,
-#'   text nodes, and HTML.
-#' @export tags
-#' @examples
-#' doc <- tags$html(
-#'   tags$head(
-#'     tags$title('My first page')
-#'   ),
-#'   tags$body(
-#'     h1('My first heading'),
-#'     p('My first paragraph, with some ',
-#'       strong('bold'),
-#'       ' text.'),
-#'     div(id='myDiv', class='simpleDiv',
-#'         'Here is a div with some attributes.')
-#'   )
-#' )
-#' cat(as.character(doc))
-NULL
-
-#' @rdname builder
-#' @format NULL
-#' @docType NULL
-#' @keywords NULL
-tags <- list(
-  a = function(...) tag("a", list(...)),
-  abbr = function(...) tag("abbr", list(...)),
-  address = function(...) tag("address", list(...)),
-  area = function(...) tag("area", list(...)),
-  article = function(...) tag("article", list(...)),
-  aside = function(...) tag("aside", list(...)),
-  audio = function(...) tag("audio", list(...)),
-  b = function(...) tag("b", list(...)),
-  base = function(...) tag("base", list(...)),
-  bdi = function(...) tag("bdi", list(...)),
-  bdo = function(...) tag("bdo", list(...)),
-  blockquote = function(...) tag("blockquote", list(...)),
-  body = function(...) tag("body", list(...)),
-  br = function(...) tag("br", list(...)),
-  button = function(...) tag("button", list(...)),
-  canvas = function(...) tag("canvas", list(...)),
-  caption = function(...) tag("caption", list(...)),
-  cite = function(...) tag("cite", list(...)),
-  code = function(...) tag("code", list(...)),
-  col = function(...) tag("col", list(...)),
-  colgroup = function(...) tag("colgroup", list(...)),
-  command = function(...) tag("command", list(...)),
-  data = function(...) tag("data", list(...)),
-  datalist = function(...) tag("datalist", list(...)),
-  dd = function(...) tag("dd", list(...)),
-  del = function(...) tag("del", list(...)),
-  details = function(...) tag("details", list(...)),
-  dfn = function(...) tag("dfn", list(...)),
-  div = function(...) tag("div", list(...)),
-  dl = function(...) tag("dl", list(...)),
-  dt = function(...) tag("dt", list(...)),
-  em = function(...) tag("em", list(...)),
-  embed = function(...) tag("embed", list(...)),
-  eventsource = function(...) tag("eventsource", list(...)),
-  fieldset = function(...) tag("fieldset", list(...)),
-  figcaption = function(...) tag("figcaption", list(...)),
-  figure = function(...) tag("figure", list(...)),
-  footer = function(...) tag("footer", list(...)),
-  form = function(...) tag("form", list(...)),
-  h1 = function(...) tag("h1", list(...)),
-  h2 = function(...) tag("h2", list(...)),
-  h3 = function(...) tag("h3", list(...)),
-  h4 = function(...) tag("h4", list(...)),
-  h5 = function(...) tag("h5", list(...)),
-  h6 = function(...) tag("h6", list(...)),
-  head = function(...) tag("head", list(...)),
-  header = function(...) tag("header", list(...)),
-  hgroup = function(...) tag("hgroup", list(...)),
-  hr = function(...) tag("hr", list(...)),
-  html = function(...) tag("html", list(...)),
-  i = function(...) tag("i", list(...)),
-  iframe = function(...) tag("iframe", list(...)),
-  img = function(...) tag("img", list(...)),
-  input = function(...) tag("input", list(...)),
-  ins = function(...) tag("ins", list(...)),
-  kbd = function(...) tag("kbd", list(...)),
-  keygen = function(...) tag("keygen", list(...)),
-  label = function(...) tag("label", list(...)),
-  legend = function(...) tag("legend", list(...)),
-  li = function(...) tag("li", list(...)),
-  link = function(...) tag("link", list(...)),
-  mark = function(...) tag("mark", list(...)),
-  map = function(...) tag("map", list(...)),
-  menu = function(...) tag("menu", list(...)),
-  meta = function(...) tag("meta", list(...)),
-  meter = function(...) tag("meter", list(...)),
-  nav = function(...) tag("nav", list(...)),
-  noscript = function(...) tag("noscript", list(...)),
-  object = function(...) tag("object", list(...)),
-  ol = function(...) tag("ol", list(...)),
-  optgroup = function(...) tag("optgroup", list(...)),
-  option = function(...) tag("option", list(...)),
-  output = function(...) tag("output", list(...)),
-  p = function(...) tag("p", list(...)),
-  param = function(...) tag("param", list(...)),
-  pre = function(...) tag("pre", list(...)),
-  progress = function(...) tag("progress", list(...)),
-  q = function(...) tag("q", list(...)),
-  ruby = function(...) tag("ruby", list(...)),
-  rp = function(...) tag("rp", list(...)),
-  rt = function(...) tag("rt", list(...)),
-  s = function(...) tag("s", list(...)),
-  samp = function(...) tag("samp", list(...)),
-  script = function(...) tag("script", list(...)),
-  section = function(...) tag("section", list(...)),
-  select = function(...) tag("select", list(...)),
-  small = function(...) tag("small", list(...)),
-  source = function(...) tag("source", list(...)),
-  span = function(...) tag("span", list(...)),
-  strong = function(...) tag("strong", list(...)),
-  style = function(...) tag("style", list(...)),
-  sub = function(...) tag("sub", list(...)),
-  summary = function(...) tag("summary", list(...)),
-  sup = function(...) tag("sup", list(...)),
-  table = function(...) tag("table", list(...)),
-  tbody = function(...) tag("tbody", list(...)),
-  td = function(...) tag("td", list(...)),
-  textarea = function(...) tag("textarea", list(...)),
-  tfoot = function(...) tag("tfoot", list(...)),
-  th = function(...) tag("th", list(...)),
-  thead = function(...) tag("thead", list(...)),
-  time = function(...) tag("time", list(...)),
-  title = function(...) tag("title", list(...)),
-  tr = function(...) tag("tr", list(...)),
-  track = function(...) tag("track", list(...)),
-  u = function(...) tag("u", list(...)),
-  ul = function(...) tag("ul", list(...)),
-  var = function(...) tag("var", list(...)),
-  video = function(...) tag("video", list(...)),
-  wbr = function(...) tag("wbr", list(...))
-)
-
-#' Mark Characters as HTML
-#'
-#' Marks the given text as HTML, which means the \link{tag} functions will know
-#' not to perform HTML escaping on it.
-#'
-#' @param text The text value to mark with HTML
-#' @param ... Any additional values to be converted to character and
-#'   concatenated together
-#' @return The same value, but marked as HTML.
-#'
-#' @examples
-#' el <- div(HTML("I like <u>turtles</u>"))
-#' cat(as.character(el))
-#'
-#' @export
-HTML <- function(text, ...) {
-  htmlText <- c(text, as.character(list(...)))
-  htmlText <- paste(htmlText, collapse=" ")
-  attr(htmlText, "html") <- TRUE
-  class(htmlText) <- c("html", "character")
-  htmlText
-}
-
-#' Evaluate an expression using the \code{tags}
-#'
-#' This function makes it simpler to write HTML-generating code. Instead of
-#' needing to specify \code{tags} each time a tag function is used, as in
-#' \code{tags$div()} and \code{tags$p()}, code inside \code{withTags} is
-#' evaluated with \code{tags} searched first, so you can simply use
-#' \code{div()} and \code{p()}.
-#'
-#' If your code uses an object which happens to have the same name as an
-#' HTML tag function, such as \code{source()} or \code{summary()}, it will call
-#' the tag function. To call the intended (non-tags function), specify the
-#' namespace, as in \code{base::source()} or \code{base::summary()}.
-#'
-#' @param code A set of tags.
-#'
-#' @examples
-#' # Using tags$ each time
-#' tags$div(class = "myclass",
-#'   tags$h3("header"),
-#'   tags$p("text")
-#' )
-#'
-#' # Equivalent to above, but using withTags
-#' withTags(
-#'   div(class = "myclass",
-#'     h3("header"),
-#'     p("text")
-#'   )
-#' )
-#'
-#'
-#' @export
-withTags <- function(code) {
-  eval(substitute(code), envir = as.list(tags), enclos = parent.frame())
-}
-
-
-# Given a list of tags, lists, and other items, return a flat list, where the
-# items from the inner, nested lists are pulled to the top level, recursively.
-flattenTags <- function(x) {
-  if (isTag(x)) {
-    # For tags, wrap them into a list (which will be unwrapped by caller)
-    list(x)
-  } else if (is.list(x)) {
-    if (length(x) == 0) {
-      # Empty lists are simply returned
-      x
-    } else {
-      # For items that are lists (but not tags), recurse
-      unlist(lapply(x, flattenTags), recursive = FALSE)
-    }
-
-  } else if (is.character(x)){
-    # This will preserve attributes if x is a character with attribute,
-    # like what HTML() produces
-    list(x)
-
-  } else if (is.function(x) && inherits(x, "shiny.render.function")) {
-
-    list(useRenderFunction(x))
-
-  } else {
-    # For other items, coerce to character and wrap them into a list (which
-    # will be unwrapped by caller). Note that this will strip attributes.
-    list(as.character(x))
-  }
-}

R/tar.R

@@ -46,7 +46,7 @@ untar2 <- function(tarfile, files = NULL, list = FALSE, exdir = ".")
     mydir.create <- function(path, ...) {
         ## for Windows' sake
         path <- sub("[\\/]$", "", path)
-        if(file_test("-d", path)) return()
+        if(utils::file_test("-d", path)) return()
         if(!dir.create(path, showWarnings = TRUE, recursive = TRUE, ...))
            stop(gettextf("failed to create directory %s", sQuote(path)),
                 domain = NA)
@@ -141,7 +141,7 @@ untar2 <- function(tarfile, files = NULL, list = FALSE, exdir = ".")
                             warning(gettextf("failed to copy %s to %s", sQuote(name2), sQuote(name)), domain = NA)
                     }
                 } else {
-                    if(.Platform$OS.type == "windows") {
+                    if(isWindows()) {
                         ## this will not work for links to dirs
                         from <- file.path(dirname(name), name2)
                         if (!file.copy(from, name))

R/timer.R

@@ -4,16 +4,17 @@ now <- function() {
   as.numeric(Sys.time()) * 1000
 }
 
-TimerCallbacks <- setRefClass(
+TimerCallbacks <- R6Class(
   'TimerCallbacks',
-  fields = list(
-    .nextId = 'integer',
+  portable = FALSE,
+  class = FALSE,
+  public = list(
+    .nextId = 0L,
     .funcs = 'Map',
-    .times = 'data.frame'
-  ),
-  methods = list(
+    .times = data.frame(),
+
     initialize = function() {
-      .nextId <<- 0L
+      .funcs <<- Map$new()
     },
     clear = function() {
       .nextId <<- 0L

R/update-input.R

@@ -54,37 +54,43 @@ updateTextInput <- function(session, inputId, label = NULL, value = NULL) {
 updateCheckboxInput <- updateTextInput
 
 
-#' Change the value of a slider input on the client
+#' Change the label or icon of an action button on the client
 #'
 #' @template update-input
-#' @param value The value to set for the input object.
+#' @param icon The icon to set for the input object. To remove the
+#' current icon, use \code{icon=character(0)}.
 #'
-#' @seealso \code{\link{sliderInput}}
+#' @seealso \code{\link{actionButton}}
 #'
 #' @examples
 #' \dontrun{
 #' shinyServer(function(input, output, session) {
 #'
 #'   observe({
-#'     # We'll use the input$controller variable multiple times, so save it as x
-#'     # for convenience.
-#'     x <- input$controller
+#'     # Updates goButton's label and icon
+#'     updateActionButton(session, "goButton",
+#'       label = "New label",
+#'       icon = icon("calendar"))
 #'
-#'     # Similar to number and text. only label and value can be set for slider
-#'     updateSliderInput(session, "inSlider",
-#'       label = paste("Slider label", x),
-#'       value = x)
+#'     # Leaves goButton2's label unchaged and
+#'     # removes its icon
+#'     updateActionButton(session, "goButton2",
+#'       icon = character(0))
 #'
-#'     # For sliders that pick out a range, pass in a vector of 2 values.
-#'     updateSliderInput(session, "inSlider2", value = c(x-1, x+1))
-#'
-#'     # An NA means to not change that value (the low or high one)
-#'     updateSliderInput(session, "inSlider3", value = c(NA, x+2))
+#'     # Leaves goButton3's icon, if it exists,
+#'     # unchaged and changes its label
+#'     updateActionButton(session, "goButton3",
+#'       label = "New label")
 #'   })
 #' })
 #' }
 #' @export
-updateSliderInput <- updateTextInput
+updateActionButton <- function(session, inputId, label = NULL, icon = NULL) {
+  if (!is.null(icon)) icon <- as.character(validateIcon(icon))
+  message <- dropNulls(list(label=label, icon=icon))
+  session$sendInputMessage(inputId, message)
+}
+
 
 #' Change the value of a date input on the client
 #'
@@ -118,7 +124,7 @@ updateSliderInput <- updateTextInput
 #' }
 #' @export
 updateDateInput <- function(session, inputId, label = NULL, value = NULL,
-    min = NULL, max = NULL) {
+                            min = NULL, max = NULL) {
 
   # If value is a date object, convert it to a string with yyyy-mm-dd format
   # Same for min and max
@@ -163,8 +169,8 @@ updateDateInput <- function(session, inputId, label = NULL, value = NULL,
 #' }
 #' @export
 updateDateRangeInput <- function(session, inputId, label = NULL,
-    start = NULL, end = NULL, min = NULL, max = NULL) {
-
+                                 start = NULL, end = NULL, min = NULL,
+                                 max = NULL) {
   # Make sure start and end are strings, not date objects. This is for
   # consistency across different locales.
   if (inherits(start, "Date"))  start <- format(start, '%Y-%m-%d')
@@ -217,6 +223,13 @@ updateTabsetPanel <- function(session, inputId, selected = NULL) {
   session$sendInputMessage(inputId, message)
 }
 
+#' @rdname updateTabsetPanel
+#' @export
+updateNavbarPage <- updateTabsetPanel
+
+#' @rdname updateTabsetPanel
+#' @export
+updateNavlistPanel <- updateTabsetPanel
 
 #' Change the value of a number input on the client
 #'
@@ -256,13 +269,101 @@ updateNumericInput <- function(session, inputId, label = NULL, value = NULL,
   session$sendInputMessage(inputId, message)
 }
 
+#' Change the value of a slider input on the client
+#'
+#' @template update-input
+#' @param value The value to set for the input object.
+#' @param min Minimum value.
+#' @param max Maximum value.
+#' @param step Step size.
+#'
+#' @seealso \code{\link{sliderInput}}
+#'
+#' @examples
+#' ## Only run this example in interactive R sessions
+#' if (interactive()) {
+#'   shinyApp(
+#'     ui = fluidPage(
+#'       sidebarLayout(
+#'         sidebarPanel(
+#'           p("The first slider controls the second"),
+#'           sliderInput("control", "Controller:", min=0, max=20, value=10,
+#'                        step=1),
+#'           sliderInput("receive", "Receiver:", min=0, max=20, value=10,
+#'                        step=1)
+#'         ),
+#'         mainPanel()
+#'       )
+#'     ),
+#'     server = function(input, output, session) {
+#'       observe({
+#'         val <- input$control
+#'         # Control the value, min, max, and step.
+#'         # Step size is 2 when input value is even; 1 when value is odd.
+#'         updateSliderInput(session, "receive", value = val,
+#'           min = floor(val/2), max = val+4, step = (val+1)%%2 + 1)
+#'       })
+#'     }
+#'   )
+#' }
+#' @export
+updateSliderInput <- function(session, inputId, label = NULL, value = NULL,
+  min = NULL, max = NULL, step = NULL)
+{
+  # Make sure that value, min, max all have the same type, because we need
+  # special handling for dates and datetimes.
+  vals <- dropNulls(list(value, min, max))
+
+  type <- unique(lapply(vals, function(x) {
+    if      (inherits(x, "Date"))   "date"
+    else if (inherits(x, "POSIXt")) "datetime"
+    else                            "number"
+  }))
+  if (length(type) > 1) {
+    stop("Type mismatch for value, min, and max")
+  }
+
+  if ((length(type) == 1) && (type == "date" || type == "datetime")) {
+    to_ms <- function(x) 1000 * as.numeric(as.POSIXct(x))
+    if (!is.null(min))   min   <- to_ms(min)
+    if (!is.null(max))   max   <- to_ms(max)
+    if (!is.null(value)) value <- to_ms(value)
+  }
+
+  message <- dropNulls(list(
+    label = label,
+    value = formatNoSci(value),
+    min = formatNoSci(min),
+    max = formatNoSci(max),
+    step = formatNoSci(step)
+  ))
+  session$sendInputMessage(inputId, message)
+}
+
+
+updateInputOptions <- function(session, inputId, label = NULL, choices = NULL,
+                               selected = NULL, inline = FALSE,
+                               type = 'checkbox') {
+  if (!is.null(choices))
+    choices <- choicesWithNames(choices)
+  if (!is.null(selected))
+    selected <- validateSelected(selected, choices, inputId)
+
+  options <- if (!is.null(choices)) {
+    format(tagList(
+      generateOptions(inputId, choices, selected, inline, type = type)
+    ))
+  }
+
+  message <- dropNulls(list(label = label, options = options, value = selected))
+
+  session$sendInputMessage(inputId, message)
+}
 
 #' Change the value of a checkbox group input on the client
 #'
 #' @template update-input
-#' @param choices A named vector or named list of options. For each item, the
-#'   name will be used as the label, and the value will be used as the value.
-#' @param selected A vector or list of options (values) which will be selected.
+#' @inheritParams checkboxGroupInput
 #'
 #' @seealso \code{\link{checkboxGroupInput}}
 #'
@@ -295,27 +396,16 @@ updateNumericInput <- function(session, inputId, label = NULL, value = NULL,
 #' }
 #' @export
 updateCheckboxGroupInput <- function(session, inputId, label = NULL,
-  choices = NULL, selected = NULL) {
-
-  choices <- choicesWithNames(choices)
-  if (!is.null(selected))
-    selected <- validateSelected(selected, choices, inputId)
-
-  options <- if (length(choices))
-    columnToRowData(list(value = choices, label = names(choices)))
-
-  message <- dropNulls(list(label = label, options = options, value = selected))
-
-  session$sendInputMessage(inputId, message)
+                                     choices = NULL, selected = NULL,
+                                     inline = FALSE) {
+  updateInputOptions(session, inputId, label, choices, selected, inline)
 }
 
 
 #' Change the value of a radio input on the client
 #'
 #' @template update-input
-#' @param choices A named vector or named list of options. For each item, the
-#'   name will be used as the label, and the value will be used as the value.
-#' @param selected A vector or list of options (values) which will be selected.
+#' @inheritParams radioButtons
 #'
 #' @seealso \code{\link{radioButtons}}
 #'
@@ -345,15 +435,18 @@ updateCheckboxGroupInput <- function(session, inputId, label = NULL,
 #' })
 #' }
 #' @export
-updateRadioButtons <- updateCheckboxGroupInput
+updateRadioButtons <- function(session, inputId, label = NULL, choices = NULL,
+                               selected = NULL, inline = FALSE) {
+  # you must select at least one radio button
+  if (is.null(selected) && !is.null(choices)) selected <- choices[[1]]
+  updateInputOptions(session, inputId, label, choices, selected, inline, type = 'radio')
+}
 
 
 #' Change the value of a select input on the client
 #'
 #' @template update-input
-#' @param choices A named vector or named list of options. For each item, the
-#'   name will be used as the label, and the value will be used as the value.
-#' @param selected A vector or list of options (values) which will be selected.
+#' @inheritParams selectInput
 #'
 #' @seealso \code{\link{selectInput}}
 #'
@@ -386,19 +479,26 @@ updateRadioButtons <- updateCheckboxGroupInput
 #' })
 #' }
 #' @export
-updateSelectInput <- updateCheckboxGroupInput
+updateSelectInput <- function(session, inputId, label = NULL, choices = NULL,
+                              selected = NULL) {
+  choices <- if (!is.null(choices)) choicesWithNames(choices)
+  if (!is.null(selected))
+    selected <- validateSelected(selected, choices, inputId)
+  options <- if (!is.null(choices)) selectOptions(choices, selected)
+  message <- dropNulls(list(label = label, options = options, value = selected))
+  session$sendInputMessage(inputId, message)
+}
 
 #' @rdname updateSelectInput
-#' @param options a list of options (see \code{\link{selectizeInput}})
+#' @inheritParams selectizeInput
 #' @param server whether to store \code{choices} on the server side, and load
 #'   the select options dynamically on searching, instead of writing all
 #'   \code{choices} into the page at once (i.e., only use the client-side
 #'   version of \pkg{selectize.js})
 #' @export
-updateSelectizeInput <- function(
-  session, inputId, label = NULL, choices = NULL, selected = NULL,
-  options = list(), server = FALSE
-) {
+updateSelectizeInput <- function(session, inputId, label = NULL, choices = NULL,
+                                 selected = NULL, options = list(),
+                                 server = FALSE) {
   if (length(options)) {
     res <- checkAsIs(options)
     cfg <- tags$script(
@@ -407,22 +507,16 @@ updateSelectizeInput <- function(
       `data-eval` = if (length(res$eval)) HTML(toJSON(res$eval)),
       HTML(toJSON(res$options))
     )
-    session$sendInputMessage(inputId, list(newOptions = as.character(cfg)))
+    session$sendInputMessage(inputId, list(config = as.character(cfg)))
   }
   if (!server) {
     return(updateSelectInput(session, inputId, label, choices, selected))
   }
-  # in the server mode, the choices are not available before we type, so we
-  # cannot really pre-select any options, but here we insert the `selected`
-  # options into selectize forcibly
   value <- unname(selected)
-  selected <- choicesWithNames(selected)
+  attr(choices, 'selected_value') <- value
   message <- dropNulls(list(
     label = label,
     value = value,
-    selected = if (length(selected)) {
-      columnToRowData(list(label = names(selected), value = selected))
-    },
     url = session$registerDataObj(inputId, choices, selectizeJSON)
   ))
   session$sendInputMessage(inputId, message)
@@ -431,18 +525,20 @@ updateSelectizeInput <- function(
 selectizeJSON <- function(data, req) {
   query <- parseQueryString(req$QUERY_STRING)
   # extract the query variables, conjunction (and/or), search string, maximum options
-  var <- fromJSON(query$field)
+  var <- c(jsonlite::fromJSON(query$field))
   cjn <- if (query$conju == 'and') all else any
   # all keywords in lower-case, for case-insensitive matching
   key <- unique(strsplit(tolower(query$query), '\\s+')[[1]])
   if (identical(key, '')) key <- character(0)
-  mop <- query$maxop
+  mop <- as.numeric(query$maxop)
+  vfd <- query$value  # the value field name
+  sel <- attr(data, 'selected_value', exact = TRUE)
 
   # convert a single vector to a data frame so it returns {label: , value: }
   # later in JSON; other objects return arbitrary JSON {x: , y: , foo: , ...}
   data <- if (is.atomic(data)) {
-    data <- choicesWithNames(data)
-    data.frame(label = names(data), value = data, stringsAsFactors = FALSE)
+    data.frame(label = names(choicesWithNames(data)), value = data,
+               stringsAsFactors = FALSE)
   } else as.data.frame(data, stringsAsFactors = FALSE)
 
   # start searching for keywords in all specified columns
@@ -459,8 +555,14 @@ selectizeJSON <- function(data, req) {
     idx <- idx | apply(matches, 1, cjn)
   }
   # only return the first n rows (n = maximum options in configuration)
-  idx <- head(which(idx), mop)
+  idx <- utils::head(if (length(key)) which(idx) else seq_along(idx), mop)
+  # make sure the selected value is in the data
+  if (length(sel)) {
+    i <- stats::na.omit(match(sel, data[, vfd]))
+    if (length(i)) idx <- sort(utils::head(unique(c(i, idx)), mop))
+  }
   data <- data[idx, ]
 
-  httpResponse(200, 'application/json', toJSON(columnToRowData(data)))
+  res <- toJSON(columnToRowData(data))
+  httpResponse(200, 'application/json', enc2utf8(res))
 }

README.md

@@ -1,17 +1,17 @@
 # Shiny
 
-[![Build Status](https://travis-ci.org/rstudio/shiny.png)](https://travis-ci.org/rstudio/shiny)
+[![Build Status](https://travis-ci.org/rstudio/shiny.svg?branch=master)](https://travis-ci.org/rstudio/shiny)
 
 Shiny is a new package from RStudio that makes it incredibly easy to build interactive web applications with R.
 
-For an introduction and examples, visit the [Shiny homepage](http://www.rstudio.com/shiny/).
+For an introduction and examples, visit the [Shiny Dev Center](http://shiny.rstudio.com/).
 
 ## Features
 
 * Build useful web applications with only a few lines of code—no JavaScript required.
 * Shiny applications are automatically "live" in the same way that spreadsheets are live. Outputs change instantly as users modify inputs, without requiring a reload of the browser.
 * Shiny user interfaces can be built entirely using R, or can be written directly in HTML, CSS, and JavaScript for more flexibility.
-* Works in any R environment (Console R, Rgui for Windows or Mac, ESS, StatET, RStudio, etc.)
+* Works in any R environment (Console R, Rgui for Windows or Mac, ESS, StatET, RStudio, etc.).
 * Attractive default UI theme based on [Bootstrap](http://getbootstrap.com/2.3.2/).
 * A highly customizable slider widget with built-in support for animation.
 * Pre-built output widgets for displaying plots, tables, and printed output of R objects.
@@ -32,15 +32,31 @@ To install the latest development builds directly from GitHub, run this instead:
 ```r
 if (!require("devtools"))
   install.packages("devtools")
-devtools::install_github("shiny", "rstudio")
+devtools::install_github("rstudio/shiny")
 ```
 
 ## Getting Started
 
-To learn more we highly recommend you check out the [Shiny Tutorial](http://rstudio.github.com/shiny/tutorial). The tutorial explains the framework in-depth, walks you through building a simple application, and includes extensive annotated examples.
+To learn more we highly recommend you check out the [Shiny Tutorial](http://shiny.rstudio.com/tutorial/). The tutorial explains the framework in-depth, walks you through building a simple application, and includes extensive annotated examples.
 
 We hope you enjoy using Shiny. If you have general questions about using Shiny, please use the Shiny [mailing list](https://groups.google.com/forum/#!forum/shiny-discuss). For bug reports, please use the [issue tracker](https://github.com/rstudio/shiny/issues).
 
+## Bootstrap 3 migration
+
+Shiny versions 0.10.2.2 and below used the Bootstrap 2 web framework. After 0.10.2.2, Shiny switched to Bootstrap 3. For most users, the upgrade should be seamless. However, if you have have customized your HTML-generating code to use features specific to Bootstrap 2, you may need to update your code to work with Bootstrap 3.
+
+If you do not wish to update your code at this time, you can use the [shinybootstrap2](https://github.com/rstudio/shinybootstrap2) package for backward compatibility.
+
+If you prefer to install an older version of Shiny, you can do it using the devtools package:
+
+```R
+devtools::install_version("shiny", version = "0.10.2.2")
+```
+
+## Development notes
+
+The Javascript code in Shiny is minified using tools that run on Node.js. See the tools/ directory for more information.
+
 ## License
 
 The shiny package is licensed under the GPLv3. See these files in the inst directory for additional details:

inst/COPYING

@@ -1,678 +0,0 @@
-The shiny package is licensed to you under the GPLv3, the terms of 
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-
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inst/NOTICE

@@ -1,325 +0,0 @@
-The shiny package inludes other open source software components. The following
-is a list of these components (full copies of the license agreements used by
-these components are included below):
-
-- jQuery
-- Bootstrap
-- bootstrap-datepicker, from https://github.com/eternicode/bootstrap-datepicker
-- selectize, from https://github.com/brianreavis/selectize.js
-- es5-shim
-- jslider
-- DataTables
-
-jQuery License
-----------------------------------------------------------------------
-
-Copyright (c) 2012 jQuery Foundation and other contributors,
-http://jquery.com/
-
-Permission is hereby granted, free of charge, to any person obtaining
-a copy of this software and associated documentation files (the
-"Software"), to deal in the Software without restriction, including
-without limitation the rights to use, copy, modify, merge, publish,
-distribute, sublicense, and/or sell copies of the Software, and to
-permit persons to whom the Software is furnished to do so, subject to
-the following conditions:
-
-The above copyright notice and this permission notice shall be
-included in all copies or substantial portions of the Software.
-
-THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
-EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
-MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
-NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
-LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
-OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
-WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
-
-
-Bootstrap, bootstrap-datepicker, and selectize License
-----------------------------------------------------------------------
-
-                                 Apache License
-                           Version 2.0, January 2004
-                        http://www.apache.org/licenses/
-
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-es5-shim License
-----------------------------------------------------------------------
-
-The MIT License (MIT)
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-
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-of this software and associated documentation files (the "Software"), to deal
-in the Software without restriction, including without limitation the rights
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-The above copyright notice and this permission notice shall be included in
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-FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
-AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
-LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
-OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
-THE SOFTWARE.
-
-
-jslider License
-----------------------------------------------------------------------
-
-The MIT License (MIT)
-Copyright (c) 2012 Egor Khmelev
-
-Permission is hereby granted, free of charge, to any person obtaining a copy
-of this software and associated documentation files (the "Software"), to deal
-in the Software without restriction, including without limitation the rights
-to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
-copies of the Software, and to permit persons to whom the Software is
-furnished to do so, subject to the following conditions:
-
-The above copyright notice and this permission notice shall be included in all
-copies or substantial portions of the Software.
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-THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
-IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
-FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
-AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
-LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
-OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
-SOFTWARE.
-
-
-DataTables License
-----------------------------------------------------------------------
-
-Copyright (c) 2008-2010, Allan Jardine
-All rights reserved.
-
-Redistribution and use in source and binary forms, with or without
-modification, are permitted provided that the following conditions are met:
-
-    * Redistributions of source code must retain the above copyright notice,
-      this list of conditions and the following disclaimer.
-
-    * Redistributions in binary form must reproduce the above copyright
-      notice, this list of conditions and the following disclaimer in the
-      documentation and/or other materials provided with the distribution.
-
-    * Neither the name of Allan Jardine nor SpryMedia UK may be used to
-      endorse or promote products derived from this software without specific
-      prior written permission.
-
-THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS "AS IS" AND ANY EXPRESS
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-NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
-EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

inst/examples/01_hello/rsconnect/localhost/admin/01_hello.dcf

@@ -0,0 +1,6 @@
+name: 01_hello
+account: admin
+server: localhost
+bundleId: 1
+url: http://localhost:3939/admin/01_hello/
+when: 1436550957.65385

inst/examples/04_mpg/server.R

@@ -12,22 +12,22 @@ mpgData$am <- factor(mpgData$am, labels = c("Automatic", "Manual"))
 # Define server logic required to plot various variables against
 # mpg
 shinyServer(function(input, output) {
-  
-  # Compute the forumla text in a reactive expression since it is
+
+  # Compute the formula text in a reactive expression since it is
   # shared by the output$caption and output$mpgPlot functions
   formulaText <- reactive({
     paste("mpg ~", input$variable)
   })
-   
+
   # Return the formula text for printing as a caption
   output$caption <- renderText({
     formulaText()
   })
-  
+
   # Generate a plot of the requested variable against mpg and
   # only include outliers if requested
   output$mpgPlot <- renderPlot({
-    boxplot(as.formula(formulaText()), 
+    boxplot(as.formula(formulaText()),
             data = mpgData,
             outline = input$outliers)
   })

inst/examples/05_sliders/ui.R

@@ -2,39 +2,39 @@ library(shiny)
 
 # Define UI for slider demo application
 shinyUI(fluidPage(
-  
+
   #  Application title
   titlePanel("Sliders"),
-  
+
   # Sidebar with sliders that demonstrate various available
   # options
   sidebarLayout(
     sidebarPanel(
       # Simple integer interval
-      sliderInput("integer", "Integer:", 
+      sliderInput("integer", "Integer:",
                   min=0, max=1000, value=500),
-      
+
       # Decimal interval with step value
-      sliderInput("decimal", "Decimal:", 
+      sliderInput("decimal", "Decimal:",
                   min = 0, max = 1, value = 0.5, step= 0.1),
-     
+
       # Specification of range within an interval
       sliderInput("range", "Range:",
                   min = 1, max = 1000, value = c(200,500)),
-      
-      # Provide a custom currency format for value display, 
+
+      # Provide a custom currency format for value display,
 		# with basic animation
-      sliderInput("format", "Custom Format:", 
+      sliderInput("format", "Custom Format:",
                   min = 0, max = 10000, value = 0, step = 2500,
-                  format="$#,##0", locale="us", animate=TRUE),
-      
+                  pre = "$", sep = ",", animate=TRUE),
+
       # Animation with custom interval (in ms) to control speed,
 		# plus looping
       sliderInput("animation", "Looping Animation:", 1, 2000, 1,
 					  	step = 10, animate=
 							animationOptions(interval=300, loop=TRUE))
     ),
-    
+
     # Show a table summarizing the values entered
     mainPanel(
       tableOutput("values")

inst/staticdocs/index.r

@@ -5,6 +5,8 @@ sd_section("UI Layout",
     "bootstrapPage",
     "column",
     "conditionalPanel",
+    "fillPage",
+    "fillRow",
     "fixedPage",
     "fluidPage",
     "headerPanel",
@@ -42,6 +44,8 @@ sd_section("UI Inputs",
     "sliderInput",
     "submitButton",
     "textInput",
+    "passwordInput",
+    "updateActionButton",
     "updateCheckboxGroupInput",
     "updateCheckboxInput",
     "updateDateInput",
@@ -58,13 +62,14 @@ sd_section("UI Outputs",
   "Functions for creating user interface elements that, in conjunction with rendering functions, display different kinds of output from your application.",
   c(
     "htmlOutput",
-    "imageOutput",
     "plotOutput",
     "outputOptions",
     "tableOutput",
     "textOutput",
     "verbatimTextOutput",
-    "downloadButton"
+    "downloadButton",
+    "Progress",
+    "withProgress"
   )
 )
 sd_section("Interface builder functions",
@@ -76,7 +81,10 @@ sd_section("Interface builder functions",
     "singleton",
     "tag",
     "validateCssUnit",
-    "withTags"
+    "withTags",
+    "htmlTemplate",
+    "bootstrapLib",
+    "suppressDependencies"
   )
 )
 sd_section("Rendering functions",
@@ -105,6 +113,7 @@ sd_section("Reactive constructs",
     "isolate",
     "makeReactiveBinding",
     "observe",
+    "observeEvent",
     "reactive",
     "reactiveFileReader",
     "reactivePoll",
@@ -126,16 +135,18 @@ sd_section("Running",
   "Functions that are used to run or stop Shiny applications.",
   c(
     "runApp",
+    "runGadget",
     "runExample",
-    "runGist",
-    "runGitHub",
+    "runGadget",
     "runUrl",
-    "stopApp"
+    "stopApp",
+    "viewer"
   )
 )
 sd_section("Extending Shiny",
   "Functions that are intended to be called by third-party packages that extend Shiny.",
   c(
+    "createWebDependency",
     "addResourcePath",
     "registerInputHandler",
     "removeInputHandler",
@@ -145,6 +156,8 @@ sd_section("Extending Shiny",
 sd_section("Utility functions",
   "Miscellaneous utilities that may be useful to advanced users or when extending Shiny.",
   c(
+    "req",
+    "cancelOutput",
     "validate",
     "session",
     "exprToFunction",
@@ -152,15 +165,33 @@ sd_section("Utility functions",
     "parseQueryString",
     "plotPNG",
     "repeatable",
-    "shinyDeprecated"
+    "shinyDeprecated",
+    "serverInfo",
+    "shiny-options"
+  )
+)
+sd_section("Plot interaction",
+  "Functions related to interactive plots",
+  c(
+    "brushedPoints",
+    "brushOpts",
+    "clickOpts",
+    "dblclickOpts",
+    "hoverOpts",
+    "nearPoints"
+  )
+)
+sd_section("Modules",
+  "Functions for modularizing Shiny apps",
+  c(
+    "NS",
+    "callModule"
   )
 )
 sd_section("Embedding",
   "Functions that are intended for third-party packages that embed Shiny applications.",
   c(
     "shinyApp",
-    "maskReactiveContext",
-    "knitr_methods",
-    "getProvidedHtmlDependencies"
+    "maskReactiveContext"
   )
 )

inst/template/default.html

@@ -0,0 +1,7 @@
+<!DOCTYPE html>
+<html>
+<head>
+{{ headContent() }}
+</head>
+{{ body }}
+</html>

inst/tests-js/SpecRunner.html

@@ -1,95 +0,0 @@
-<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"
-  "http://www.w3.org/TR/html4/loose.dtd">
-<html>
-<head>
-  <title>Jasmine Spec Runner</title>
-
-  <link rel="shortcut icon" type="image/png" href="lib/jasmine-1.3.1/jasmine_favicon.png">
-  <link rel="stylesheet" type="text/css" href="lib/jasmine-1.3.1/jasmine.css">
-  <script type="text/javascript" src="lib/jasmine-1.3.1/jasmine.js"></script>
-  <script type="text/javascript" src="lib/jasmine-1.3.1/jasmine-html.js"></script>
-
-  <!-- include source files here... -->
-
-  <!-- All of these includes are copied out of the HTML file generated by
-  shinyUI() -->
-  <script src="../www/shared/jquery.js" type="text/javascript"></script>
-  <script src="../www/shared/shiny.js" type="text/javascript"></script>
-  <link rel="stylesheet" type="text/css" href="../www/shared/shiny.css"/>
-  <link rel="stylesheet" type="text/css" href="../www/shared/slider/css/jquery.slider.min.css"/>
-  <script src="../www/shared/slider/js/jquery.slider.min.js"></script>
-  <link rel="stylesheet" type="text/css" href="../www/shared/bootstrap/css/bootstrap.min.css"/>
-  <script src="../www/shared/bootstrap/js/bootstrap.min.js"></script>
-  <!-- <meta name="viewport" content="width=device-width, initial-scale=1.0"/> -->
-  <link rel="stylesheet" type="text/css" href="../www/shared/bootstrap/css/bootstrap-responsive.min.css"/>
-
-  <script src="../www/shared/datepicker/js/bootstrap-datepicker.min.js"></script>
-  <link rel="stylesheet" type="text/css" href="../www/shared/datepicker/css/datepicker.css"/>
-
-  <script src="../www/shared/bootstrap-daterangepicker/date.js"></script>
-  <script src="../www/shared/bootstrap-daterangepicker/daterangepicker.js"></script>
-  <link rel="stylesheet" type="text/css" href="../www/shared/bootstrap-daterangepicker/daterangepicker.css"/>
-
-  <!-- include spec files here... -->
- <!-- <script type="text/javascript" src="spec/SpecHelper.js"></script>
-  <script type="text/javascript" src="spec/PlayerSpec.js"></script>
- -->
-  <script type="text/javascript" src="spec/inputBindingSpec.js"></script>
-
-  <script type="text/javascript">
-    (function() {
-      var jasmineEnv = jasmine.getEnv();
-      jasmineEnv.updateInterval = 1000;
-
-      var htmlReporter = new jasmine.HtmlReporter();
-
-      jasmineEnv.addReporter(htmlReporter);
-
-      jasmineEnv.specFilter = function(spec) {
-        return htmlReporter.specFilter(spec);
-      };
-
-      // var currentWindowOnload = window.onload;
-
-      // window.onload = function() {
-      //   if (currentWindowOnload) {
-      //     currentWindowOnload();
-      //   }
-      //   execJasmine();
-      // };
-
-      // Add a slight delay before running tests, so that Shiny has time to
-      // do setup stuff.
-      $(document).ready(function() {
-        setTimeout(function() {
-            execJasmine();
-          },
-          50
-        )
-      });
-
-
-      function execJasmine() {
-        jasmineEnv.execute();
-      }
-
-    })();
-
-
-    // Clear the Shiny disconnected gray screen shortly after loading
-    $(document).ready(function() {
-      setTimeout(function() {
-          $('body').removeClass('disconnected');
-        },
-        100
-      )
-    });
-
-  </script>
-
-</head>
-
-<body>
-
-</body>
-</html>

inst/tests-js/fixtures/textInputBinding.html

@@ -1,2 +0,0 @@
-<label>Text input:</label>
-<input id="in_text" type="text" value="starting value"/>

inst/tests-js/lib/jasmine-1.3.1/MIT.LICENSE

@@ -1,20 +0,0 @@
-Copyright (c) 2008-2011 Pivotal Labs
-
-Permission is hereby granted, free of charge, to any person obtaining
-a copy of this software and associated documentation files (the
-"Software"), to deal in the Software without restriction, including
-without limitation the rights to use, copy, modify, merge, publish,
-distribute, sublicense, and/or sell copies of the Software, and to
-permit persons to whom the Software is furnished to do so, subject to
-the following conditions:
-
-The above copyright notice and this permission notice shall be
-included in all copies or substantial portions of the Software.
-
-THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
-EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
-MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
-NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
-LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
-OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
-WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

inst/tests-js/lib/jasmine-1.3.1/jasmine-html.js

@@ -1,681 +0,0 @@
-jasmine.HtmlReporterHelpers = {};
-
-jasmine.HtmlReporterHelpers.createDom = function(type, attrs, childrenVarArgs) {
-  var el = document.createElement(type);
-
-  for (var i = 2; i < arguments.length; i++) {
-    var child = arguments[i];
-
-    if (typeof child === 'string') {
-      el.appendChild(document.createTextNode(child));
-    } else {
-      if (child) {
-        el.appendChild(child);
-      }
-    }
-  }
-
-  for (var attr in attrs) {
-    if (attr == "className") {
-      el[attr] = attrs[attr];
-    } else {
-      el.setAttribute(attr, attrs[attr]);
-    }
-  }
-
-  return el;
-};
-
-jasmine.HtmlReporterHelpers.getSpecStatus = function(child) {
-  var results = child.results();
-  var status = results.passed() ? 'passed' : 'failed';
-  if (results.skipped) {
-    status = 'skipped';
-  }
-
-  return status;
-};
-
-jasmine.HtmlReporterHelpers.appendToSummary = function(child, childElement) {
-  var parentDiv = this.dom.summary;
-  var parentSuite = (typeof child.parentSuite == 'undefined') ? 'suite' : 'parentSuite';
-  var parent = child[parentSuite];
-
-  if (parent) {
-    if (typeof this.views.suites[parent.id] == 'undefined') {
-      this.views.suites[parent.id] = new jasmine.HtmlReporter.SuiteView(parent, this.dom, this.views);
-    }
-    parentDiv = this.views.suites[parent.id].element;
-  }
-
-  parentDiv.appendChild(childElement);
-};
-
-
-jasmine.HtmlReporterHelpers.addHelpers = function(ctor) {
-  for(var fn in jasmine.HtmlReporterHelpers) {
-    ctor.prototype[fn] = jasmine.HtmlReporterHelpers[fn];
-  }
-};
-
-jasmine.HtmlReporter = function(_doc) {
-  var self = this;
-  var doc = _doc || window.document;
-
-  var reporterView;
-
-  var dom = {};
-
-  // Jasmine Reporter Public Interface
-  self.logRunningSpecs = false;
-
-  self.reportRunnerStarting = function(runner) {
-    var specs = runner.specs() || [];
-
-    if (specs.length == 0) {
-      return;
-    }
-
-    createReporterDom(runner.env.versionString());
-    doc.body.appendChild(dom.reporter);
-    setExceptionHandling();
-
-    reporterView = new jasmine.HtmlReporter.ReporterView(dom);
-    reporterView.addSpecs(specs, self.specFilter);
-  };
-
-  self.reportRunnerResults = function(runner) {
-    reporterView && reporterView.complete();
-  };
-
-  self.reportSuiteResults = function(suite) {
-    reporterView.suiteComplete(suite);
-  };
-
-  self.reportSpecStarting = function(spec) {
-    if (self.logRunningSpecs) {
-      self.log('>> Jasmine Running ' + spec.suite.description + ' ' + spec.description + '...');
-    }
-  };
-
-  self.reportSpecResults = function(spec) {
-    reporterView.specComplete(spec);
-  };
-
-  self.log = function() {
-    var console = jasmine.getGlobal().console;
-    if (console && console.log) {
-      if (console.log.apply) {
-        console.log.apply(console, arguments);
-      } else {
-        console.log(arguments); // ie fix: console.log.apply doesn't exist on ie
-      }
-    }
-  };
-
-  self.specFilter = function(spec) {
-    if (!focusedSpecName()) {
-      return true;
-    }
-
-    return spec.getFullName().indexOf(focusedSpecName()) === 0;
-  };
-
-  return self;
-
-  function focusedSpecName() {
-    var specName;
-
-    (function memoizeFocusedSpec() {
-      if (specName) {
-        return;
-      }
-
-      var paramMap = [];
-      var params = jasmine.HtmlReporter.parameters(doc);
-
-      for (var i = 0; i < params.length; i++) {
-        var p = params[i].split('=');
-        paramMap[decodeURIComponent(p[0])] = decodeURIComponent(p[1]);
-      }
-
-      specName = paramMap.spec;
-    })();
-
-    return specName;
-  }
-
-  function createReporterDom(version) {
-    dom.reporter = self.createDom('div', { id: 'HTMLReporter', className: 'jasmine_reporter' },
-      dom.banner = self.createDom('div', { className: 'banner' },
-        self.createDom('span', { className: 'title' }, "Jasmine "),
-        self.createDom('span', { className: 'version' }, version)),
-
-      dom.symbolSummary = self.createDom('ul', {className: 'symbolSummary'}),
-      dom.alert = self.createDom('div', {className: 'alert'},
-        self.createDom('span', { className: 'exceptions' },
-          self.createDom('label', { className: 'label', 'for': 'no_try_catch' }, 'No try/catch'),
-          self.createDom('input', { id: 'no_try_catch', type: 'checkbox' }))),
-      dom.results = self.createDom('div', {className: 'results'},
-        dom.summary = self.createDom('div', { className: 'summary' }),
-        dom.details = self.createDom('div', { id: 'details' }))
-    );
-  }
-
-  function noTryCatch() {
-    return window.location.search.match(/catch=false/);
-  }
-
-  function searchWithCatch() {
-    var params = jasmine.HtmlReporter.parameters(window.document);
-    var removed = false;
-    var i = 0;
-
-    while (!removed && i < params.length) {
-      if (params[i].match(/catch=/)) {
-        params.splice(i, 1);
-        removed = true;
-      }
-      i++;
-    }
-    if (jasmine.CATCH_EXCEPTIONS) {
-      params.push("catch=false");
-    }
-
-    return params.join("&");
-  }
-
-  function setExceptionHandling() {
-    var chxCatch = document.getElementById('no_try_catch');
-
-    if (noTryCatch()) {
-      chxCatch.setAttribute('checked', true);
-      jasmine.CATCH_EXCEPTIONS = false;
-    }
-    chxCatch.onclick = function() {
-      window.location.search = searchWithCatch();
-    };
-  }
-};
-jasmine.HtmlReporter.parameters = function(doc) {
-  var paramStr = doc.location.search.substring(1);
-  var params = [];
-
-  if (paramStr.length > 0) {
-    params = paramStr.split('&');
-  }
-  return params;
-}
-jasmine.HtmlReporter.sectionLink = function(sectionName) {
-  var link = '?';
-  var params = [];
-
-  if (sectionName) {
-    params.push('spec=' + encodeURIComponent(sectionName));
-  }
-  if (!jasmine.CATCH_EXCEPTIONS) {
-    params.push("catch=false");
-  }
-  if (params.length > 0) {
-    link += params.join("&");
-  }
-
-  return link;
-};
-jasmine.HtmlReporterHelpers.addHelpers(jasmine.HtmlReporter);
-jasmine.HtmlReporter.ReporterView = function(dom) {
-  this.startedAt = new Date();
-  this.runningSpecCount = 0;
-  this.completeSpecCount = 0;
-  this.passedCount = 0;
-  this.failedCount = 0;
-  this.skippedCount = 0;
-
-  this.createResultsMenu = function() {
-    this.resultsMenu = this.createDom('span', {className: 'resultsMenu bar'},
-      this.summaryMenuItem = this.createDom('a', {className: 'summaryMenuItem', href: "#"}, '0 specs'),
-      ' | ',
-      this.detailsMenuItem = this.createDom('a', {className: 'detailsMenuItem', href: "#"}, '0 failing'));
-
-    this.summaryMenuItem.onclick = function() {
-      dom.reporter.className = dom.reporter.className.replace(/ showDetails/g, '');
-    };
-
-    this.detailsMenuItem.onclick = function() {
-      showDetails();
-    };
-  };
-
-  this.addSpecs = function(specs, specFilter) {
-    this.totalSpecCount = specs.length;
-
-    this.views = {
-      specs: {},
-      suites: {}
-    };
-
-    for (var i = 0; i < specs.length; i++) {
-      var spec = specs[i];
-      this.views.specs[spec.id] = new jasmine.HtmlReporter.SpecView(spec, dom, this.views);
-      if (specFilter(spec)) {
-        this.runningSpecCount++;
-      }
-    }
-  };
-
-  this.specComplete = function(spec) {
-    this.completeSpecCount++;
-
-    if (isUndefined(this.views.specs[spec.id])) {
-      this.views.specs[spec.id] = new jasmine.HtmlReporter.SpecView(spec, dom);
-    }
-
-    var specView = this.views.specs[spec.id];
-
-    switch (specView.status()) {
-      case 'passed':
-        this.passedCount++;
-        break;
-
-      case 'failed':
-        this.failedCount++;
-        break;
-
-      case 'skipped':
-        this.skippedCount++;
-        break;
-    }
-
-    specView.refresh();
-    this.refresh();
-  };
-
-  this.suiteComplete = function(suite) {
-    var suiteView = this.views.suites[suite.id];
-    if (isUndefined(suiteView)) {
-      return;
-    }
-    suiteView.refresh();
-  };
-
-  this.refresh = function() {
-
-    if (isUndefined(this.resultsMenu)) {
-      this.createResultsMenu();
-    }
-
-    // currently running UI
-    if (isUndefined(this.runningAlert)) {
-      this.runningAlert = this.createDom('a', { href: jasmine.HtmlReporter.sectionLink(), className: "runningAlert bar" });
-      dom.alert.appendChild(this.runningAlert);
-    }
-    this.runningAlert.innerHTML = "Running " + this.completeSpecCount + " of " + specPluralizedFor(this.totalSpecCount);
-
-    // skipped specs UI
-    if (isUndefined(this.skippedAlert)) {
-      this.skippedAlert = this.createDom('a', { href: jasmine.HtmlReporter.sectionLink(), className: "skippedAlert bar" });
-    }
-
-    this.skippedAlert.innerHTML = "Skipping " + this.skippedCount + " of " + specPluralizedFor(this.totalSpecCount) + " - run all";
-
-    if (this.skippedCount === 1 && isDefined(dom.alert)) {
-      dom.alert.appendChild(this.skippedAlert);
-    }
-
-    // passing specs UI
-    if (isUndefined(this.passedAlert)) {
-      this.passedAlert = this.createDom('span', { href: jasmine.HtmlReporter.sectionLink(), className: "passingAlert bar" });
-    }
-    this.passedAlert.innerHTML = "Passing " + specPluralizedFor(this.passedCount);
-
-    // failing specs UI
-    if (isUndefined(this.failedAlert)) {
-      this.failedAlert = this.createDom('span', {href: "?", className: "failingAlert bar"});
-    }
-    this.failedAlert.innerHTML = "Failing " + specPluralizedFor(this.failedCount);
-
-    if (this.failedCount === 1 && isDefined(dom.alert)) {
-      dom.alert.appendChild(this.failedAlert);
-      dom.alert.appendChild(this.resultsMenu);
-    }
-
-    // summary info
-    this.summaryMenuItem.innerHTML = "" + specPluralizedFor(this.runningSpecCount);
-    this.detailsMenuItem.innerHTML = "" + this.failedCount + " failing";
-  };
-
-  this.complete = function() {
-    dom.alert.removeChild(this.runningAlert);
-
-    this.skippedAlert.innerHTML = "Ran " + this.runningSpecCount + " of " + specPluralizedFor(this.totalSpecCount) + " - run all";
-
-    if (this.failedCount === 0) {
-      dom.alert.appendChild(this.createDom('span', {className: 'passingAlert bar'}, "Passing " + specPluralizedFor(this.passedCount)));
-    } else {
-      showDetails();
-    }
-
-    dom.banner.appendChild(this.createDom('span', {className: 'duration'}, "finished in " + ((new Date().getTime() - this.startedAt.getTime()) / 1000) + "s"));
-  };
-
-  return this;
-
-  function showDetails() {
-    if (dom.reporter.className.search(/showDetails/) === -1) {
-      dom.reporter.className += " showDetails";
-    }
-  }
-
-  function isUndefined(obj) {
-    return typeof obj === 'undefined';
-  }
-
-  function isDefined(obj) {
-    return !isUndefined(obj);
-  }
-
-  function specPluralizedFor(count) {
-    var str = count + " spec";
-    if (count > 1) {
-      str += "s"
-    }
-    return str;
-  }
-
-};
-
-jasmine.HtmlReporterHelpers.addHelpers(jasmine.HtmlReporter.ReporterView);
-
-
-jasmine.HtmlReporter.SpecView = function(spec, dom, views) {
-  this.spec = spec;
-  this.dom = dom;
-  this.views = views;
-
-  this.symbol = this.createDom('li', { className: 'pending' });
-  this.dom.symbolSummary.appendChild(this.symbol);
-
-  this.summary = this.createDom('div', { className: 'specSummary' },
-    this.createDom('a', {
-      className: 'description',
-      href: jasmine.HtmlReporter.sectionLink(this.spec.getFullName()),
-      title: this.spec.getFullName()
-    }, this.spec.description)
-  );
-
-  this.detail = this.createDom('div', { className: 'specDetail' },
-      this.createDom('a', {
-        className: 'description',
-        href: '?spec=' + encodeURIComponent(this.spec.getFullName()),
-        title: this.spec.getFullName()
-      }, this.spec.getFullName())
-  );
-};
-
-jasmine.HtmlReporter.SpecView.prototype.status = function() {
-  return this.getSpecStatus(this.spec);
-};
-
-jasmine.HtmlReporter.SpecView.prototype.refresh = function() {
-  this.symbol.className = this.status();
-
-  switch (this.status()) {
-    case 'skipped':
-      break;
-
-    case 'passed':
-      this.appendSummaryToSuiteDiv();
-      break;
-
-    case 'failed':
-      this.appendSummaryToSuiteDiv();
-      this.appendFailureDetail();
-      break;
-  }
-};
-
-jasmine.HtmlReporter.SpecView.prototype.appendSummaryToSuiteDiv = function() {
-  this.summary.className += ' ' + this.status();
-  this.appendToSummary(this.spec, this.summary);
-};
-
-jasmine.HtmlReporter.SpecView.prototype.appendFailureDetail = function() {
-  this.detail.className += ' ' + this.status();
-
-  var resultItems = this.spec.results().getItems();
-  var messagesDiv = this.createDom('div', { className: 'messages' });
-
-  for (var i = 0; i < resultItems.length; i++) {
-    var result = resultItems[i];
-
-    if (result.type == 'log') {
-      messagesDiv.appendChild(this.createDom('div', {className: 'resultMessage log'}, result.toString()));
-    } else if (result.type == 'expect' && result.passed && !result.passed()) {
-      messagesDiv.appendChild(this.createDom('div', {className: 'resultMessage fail'}, result.message));
-
-      if (result.trace.stack) {
-        messagesDiv.appendChild(this.createDom('div', {className: 'stackTrace'}, result.trace.stack));
-      }
-    }
-  }
-
-  if (messagesDiv.childNodes.length > 0) {
-    this.detail.appendChild(messagesDiv);
-    this.dom.details.appendChild(this.detail);
-  }
-};
-
-jasmine.HtmlReporterHelpers.addHelpers(jasmine.HtmlReporter.SpecView);jasmine.HtmlReporter.SuiteView = function(suite, dom, views) {
-  this.suite = suite;
-  this.dom = dom;
-  this.views = views;
-
-  this.element = this.createDom('div', { className: 'suite' },
-    this.createDom('a', { className: 'description', href: jasmine.HtmlReporter.sectionLink(this.suite.getFullName()) }, this.suite.description)
-  );
-
-  this.appendToSummary(this.suite, this.element);
-};
-
-jasmine.HtmlReporter.SuiteView.prototype.status = function() {
-  return this.getSpecStatus(this.suite);
-};
-
-jasmine.HtmlReporter.SuiteView.prototype.refresh = function() {
-  this.element.className += " " + this.status();
-};
-
-jasmine.HtmlReporterHelpers.addHelpers(jasmine.HtmlReporter.SuiteView);
-
-/* @deprecated Use jasmine.HtmlReporter instead
- */
-jasmine.TrivialReporter = function(doc) {
-  this.document = doc || document;
-  this.suiteDivs = {};
-  this.logRunningSpecs = false;
-};
-
-jasmine.TrivialReporter.prototype.createDom = function(type, attrs, childrenVarArgs) {
-  var el = document.createElement(type);
-
-  for (var i = 2; i < arguments.length; i++) {
-    var child = arguments[i];
-
-    if (typeof child === 'string') {
-      el.appendChild(document.createTextNode(child));
-    } else {
-      if (child) { el.appendChild(child); }
-    }
-  }
-
-  for (var attr in attrs) {
-    if (attr == "className") {
-      el[attr] = attrs[attr];
-    } else {
-      el.setAttribute(attr, attrs[attr]);
-    }
-  }
-
-  return el;
-};
-
-jasmine.TrivialReporter.prototype.reportRunnerStarting = function(runner) {
-  var showPassed, showSkipped;
-
-  this.outerDiv = this.createDom('div', { id: 'TrivialReporter', className: 'jasmine_reporter' },
-      this.createDom('div', { className: 'banner' },
-        this.createDom('div', { className: 'logo' },
-            this.createDom('span', { className: 'title' }, "Jasmine"),
-            this.createDom('span', { className: 'version' }, runner.env.versionString())),
-        this.createDom('div', { className: 'options' },
-            "Show ",
-            showPassed = this.createDom('input', { id: "__jasmine_TrivialReporter_showPassed__", type: 'checkbox' }),
-            this.createDom('label', { "for": "__jasmine_TrivialReporter_showPassed__" }, " passed "),
-            showSkipped = this.createDom('input', { id: "__jasmine_TrivialReporter_showSkipped__", type: 'checkbox' }),
-            this.createDom('label', { "for": "__jasmine_TrivialReporter_showSkipped__" }, " skipped")
-            )
-          ),
-
-      this.runnerDiv = this.createDom('div', { className: 'runner running' },
-          this.createDom('a', { className: 'run_spec', href: '?' }, "run all"),
-          this.runnerMessageSpan = this.createDom('span', {}, "Running..."),
-          this.finishedAtSpan = this.createDom('span', { className: 'finished-at' }, ""))
-      );
-
-  this.document.body.appendChild(this.outerDiv);
-
-  var suites = runner.suites();
-  for (var i = 0; i < suites.length; i++) {
-    var suite = suites[i];
-    var suiteDiv = this.createDom('div', { className: 'suite' },
-        this.createDom('a', { className: 'run_spec', href: '?spec=' + encodeURIComponent(suite.getFullName()) }, "run"),
-        this.createDom('a', { className: 'description', href: '?spec=' + encodeURIComponent(suite.getFullName()) }, suite.description));
-    this.suiteDivs[suite.id] = suiteDiv;
-    var parentDiv = this.outerDiv;
-    if (suite.parentSuite) {
-      parentDiv = this.suiteDivs[suite.parentSuite.id];
-    }
-    parentDiv.appendChild(suiteDiv);
-  }
-
-  this.startedAt = new Date();
-
-  var self = this;
-  showPassed.onclick = function(evt) {
-    if (showPassed.checked) {
-      self.outerDiv.className += ' show-passed';
-    } else {
-      self.outerDiv.className = self.outerDiv.className.replace(/ show-passed/, '');
-    }
-  };
-
-  showSkipped.onclick = function(evt) {
-    if (showSkipped.checked) {
-      self.outerDiv.className += ' show-skipped';
-    } else {
-      self.outerDiv.className = self.outerDiv.className.replace(/ show-skipped/, '');
-    }
-  };
-};
-
-jasmine.TrivialReporter.prototype.reportRunnerResults = function(runner) {
-  var results = runner.results();
-  var className = (results.failedCount > 0) ? "runner failed" : "runner passed";
-  this.runnerDiv.setAttribute("class", className);
-  //do it twice for IE
-  this.runnerDiv.setAttribute("className", className);
-  var specs = runner.specs();
-  var specCount = 0;
-  for (var i = 0; i < specs.length; i++) {
-    if (this.specFilter(specs[i])) {
-      specCount++;
-    }
-  }
-  var message = "" + specCount + " spec" + (specCount == 1 ? "" : "s" ) + ", " + results.failedCount + " failure" + ((results.failedCount == 1) ? "" : "s");
-  message += " in " + ((new Date().getTime() - this.startedAt.getTime()) / 1000) + "s";
-  this.runnerMessageSpan.replaceChild(this.createDom('a', { className: 'description', href: '?'}, message), this.runnerMessageSpan.firstChild);
-
-  this.finishedAtSpan.appendChild(document.createTextNode("Finished at " + new Date().toString()));
-};
-
-jasmine.TrivialReporter.prototype.reportSuiteResults = function(suite) {
-  var results = suite.results();
-  var status = results.passed() ? 'passed' : 'failed';
-  if (results.totalCount === 0) { // todo: change this to check results.skipped
-    status = 'skipped';
-  }
-  this.suiteDivs[suite.id].className += " " + status;
-};
-
-jasmine.TrivialReporter.prototype.reportSpecStarting = function(spec) {
-  if (this.logRunningSpecs) {
-    this.log('>> Jasmine Running ' + spec.suite.description + ' ' + spec.description + '...');
-  }
-};
-
-jasmine.TrivialReporter.prototype.reportSpecResults = function(spec) {
-  var results = spec.results();
-  var status = results.passed() ? 'passed' : 'failed';
-  if (results.skipped) {
-    status = 'skipped';
-  }
-  var specDiv = this.createDom('div', { className: 'spec '  + status },
-      this.createDom('a', { className: 'run_spec', href: '?spec=' + encodeURIComponent(spec.getFullName()) }, "run"),
-      this.createDom('a', {
-        className: 'description',
-        href: '?spec=' + encodeURIComponent(spec.getFullName()),
-        title: spec.getFullName()
-      }, spec.description));
-
-
-  var resultItems = results.getItems();
-  var messagesDiv = this.createDom('div', { className: 'messages' });
-  for (var i = 0; i < resultItems.length; i++) {
-    var result = resultItems[i];
-
-    if (result.type == 'log') {
-      messagesDiv.appendChild(this.createDom('div', {className: 'resultMessage log'}, result.toString()));
-    } else if (result.type == 'expect' && result.passed && !result.passed()) {
-      messagesDiv.appendChild(this.createDom('div', {className: 'resultMessage fail'}, result.message));
-
-      if (result.trace.stack) {
-        messagesDiv.appendChild(this.createDom('div', {className: 'stackTrace'}, result.trace.stack));
-      }
-    }
-  }
-
-  if (messagesDiv.childNodes.length > 0) {
-    specDiv.appendChild(messagesDiv);
-  }
-
-  this.suiteDivs[spec.suite.id].appendChild(specDiv);
-};
-
-jasmine.TrivialReporter.prototype.log = function() {
-  var console = jasmine.getGlobal().console;
-  if (console && console.log) {
-    if (console.log.apply) {
-      console.log.apply(console, arguments);
-    } else {
-      console.log(arguments); // ie fix: console.log.apply doesn't exist on ie
-    }
-  }
-};
-
-jasmine.TrivialReporter.prototype.getLocation = function() {
-  return this.document.location;
-};
-
-jasmine.TrivialReporter.prototype.specFilter = function(spec) {
-  var paramMap = {};
-  var params = this.getLocation().search.substring(1).split('&');
-  for (var i = 0; i < params.length; i++) {
-    var p = params[i].split('=');
-    paramMap[decodeURIComponent(p[0])] = decodeURIComponent(p[1]);
-  }
-
-  if (!paramMap.spec) {
-    return true;
-  }
-  return spec.getFullName().indexOf(paramMap.spec) === 0;
-};

inst/tests-js/lib/jasmine-1.3.1/jasmine.css

@@ -1,82 +0,0 @@
-body { background-color: #eeeeee; padding: 0; margin: 5px; overflow-y: scroll; }
-
-#HTMLReporter { font-size: 11px; font-family: Monaco, "Lucida Console", monospace; line-height: 14px; color: #333333; }
-#HTMLReporter a { text-decoration: none; }
-#HTMLReporter a:hover { text-decoration: underline; }
-#HTMLReporter p, #HTMLReporter h1, #HTMLReporter h2, #HTMLReporter h3, #HTMLReporter h4, #HTMLReporter h5, #HTMLReporter h6 { margin: 0; line-height: 14px; }
-#HTMLReporter .banner, #HTMLReporter .symbolSummary, #HTMLReporter .summary, #HTMLReporter .resultMessage, #HTMLReporter .specDetail .description, #HTMLReporter .alert .bar, #HTMLReporter .stackTrace { padding-left: 9px; padding-right: 9px; }
-#HTMLReporter #jasmine_content { position: fixed; right: 100%; }
-#HTMLReporter .version { color: #aaaaaa; }
-#HTMLReporter .banner { margin-top: 14px; }
-#HTMLReporter .duration { color: #aaaaaa; float: right; }
-#HTMLReporter .symbolSummary { overflow: hidden; *zoom: 1; margin: 14px 0; }
-#HTMLReporter .symbolSummary li { display: block; float: left; height: 7px; width: 14px; margin-bottom: 7px; font-size: 16px; }
-#HTMLReporter .symbolSummary li.passed { font-size: 14px; }
-#HTMLReporter .symbolSummary li.passed:before { color: #5e7d00; content: "\02022"; }
-#HTMLReporter .symbolSummary li.failed { line-height: 9px; }
-#HTMLReporter .symbolSummary li.failed:before { color: #b03911; content: "x"; font-weight: bold; margin-left: -1px; }
-#HTMLReporter .symbolSummary li.skipped { font-size: 14px; }
-#HTMLReporter .symbolSummary li.skipped:before { color: #bababa; content: "\02022"; }
-#HTMLReporter .symbolSummary li.pending { line-height: 11px; }
-#HTMLReporter .symbolSummary li.pending:before { color: #aaaaaa; content: "-"; }
-#HTMLReporter .exceptions { color: #fff; float: right; margin-top: 5px; margin-right: 5px; }
-#HTMLReporter .bar { line-height: 28px; font-size: 14px; display: block; color: #eee; }
-#HTMLReporter .runningAlert { background-color: #666666; }
-#HTMLReporter .skippedAlert { background-color: #aaaaaa; }
-#HTMLReporter .skippedAlert:first-child { background-color: #333333; }
-#HTMLReporter .skippedAlert:hover { text-decoration: none; color: white; text-decoration: underline; }
-#HTMLReporter .passingAlert { background-color: #a6b779; }
-#HTMLReporter .passingAlert:first-child { background-color: #5e7d00; }
-#HTMLReporter .failingAlert { background-color: #cf867e; }
-#HTMLReporter .failingAlert:first-child { background-color: #b03911; }
-#HTMLReporter .results { margin-top: 14px; }
-#HTMLReporter #details { display: none; }
-#HTMLReporter .resultsMenu, #HTMLReporter .resultsMenu a { background-color: #fff; color: #333333; }
-#HTMLReporter.showDetails .summaryMenuItem { font-weight: normal; text-decoration: inherit; }
-#HTMLReporter.showDetails .summaryMenuItem:hover { text-decoration: underline; }
-#HTMLReporter.showDetails .detailsMenuItem { font-weight: bold; text-decoration: underline; }
-#HTMLReporter.showDetails .summary { display: none; }
-#HTMLReporter.showDetails #details { display: block; }
-#HTMLReporter .summaryMenuItem { font-weight: bold; text-decoration: underline; }
-#HTMLReporter .summary { margin-top: 14px; }
-#HTMLReporter .summary .suite .suite, #HTMLReporter .summary .specSummary { margin-left: 14px; }
-#HTMLReporter .summary .specSummary.passed a { color: #5e7d00; }
-#HTMLReporter .summary .specSummary.failed a { color: #b03911; }
-#HTMLReporter .description + .suite { margin-top: 0; }
-#HTMLReporter .suite { margin-top: 14px; }
-#HTMLReporter .suite a { color: #333333; }
-#HTMLReporter #details .specDetail { margin-bottom: 28px; }
-#HTMLReporter #details .specDetail .description { display: block; color: white; background-color: #b03911; }
-#HTMLReporter .resultMessage { padding-top: 14px; color: #333333; }
-#HTMLReporter .resultMessage span.result { display: block; }
-#HTMLReporter .stackTrace { margin: 5px 0 0 0; max-height: 224px; overflow: auto; line-height: 18px; color: #666666; border: 1px solid #ddd; background: white; white-space: pre; }
-
-#TrivialReporter { padding: 8px 13px; position: absolute; top: 0; bottom: 0; left: 0; right: 0; overflow-y: scroll; background-color: white; font-family: "Helvetica Neue Light", "Lucida Grande", "Calibri", "Arial", sans-serif; /*.resultMessage {*/ /*white-space: pre;*/ /*}*/ }
-#TrivialReporter a:visited, #TrivialReporter a { color: #303; }
-#TrivialReporter a:hover, #TrivialReporter a:active { color: blue; }
-#TrivialReporter .run_spec { float: right; padding-right: 5px; font-size: .8em; text-decoration: none; }
-#TrivialReporter .banner { color: #303; background-color: #fef; padding: 5px; }
-#TrivialReporter .logo { float: left; font-size: 1.1em; padding-left: 5px; }
-#TrivialReporter .logo .version { font-size: .6em; padding-left: 1em; }
-#TrivialReporter .runner.running { background-color: yellow; }
-#TrivialReporter .options { text-align: right; font-size: .8em; }
-#TrivialReporter .suite { border: 1px outset gray; margin: 5px 0; padding-left: 1em; }
-#TrivialReporter .suite .suite { margin: 5px; }
-#TrivialReporter .suite.passed { background-color: #dfd; }
-#TrivialReporter .suite.failed { background-color: #fdd; }
-#TrivialReporter .spec { margin: 5px; padding-left: 1em; clear: both; }
-#TrivialReporter .spec.failed, #TrivialReporter .spec.passed, #TrivialReporter .spec.skipped { padding-bottom: 5px; border: 1px solid gray; }
-#TrivialReporter .spec.failed { background-color: #fbb; border-color: red; }
-#TrivialReporter .spec.passed { background-color: #bfb; border-color: green; }
-#TrivialReporter .spec.skipped { background-color: #bbb; }
-#TrivialReporter .messages { border-left: 1px dashed gray; padding-left: 1em; padding-right: 1em; }
-#TrivialReporter .passed { background-color: #cfc; display: none; }
-#TrivialReporter .failed { background-color: #fbb; }
-#TrivialReporter .skipped { color: #777; background-color: #eee; display: none; }
-#TrivialReporter .resultMessage span.result { display: block; line-height: 2em; color: black; }
-#TrivialReporter .resultMessage .mismatch { color: black; }
-#TrivialReporter .stackTrace { white-space: pre; font-size: .8em; margin-left: 10px; max-height: 5em; overflow: auto; border: 1px inset red; padding: 1em; background: #eef; }
-#TrivialReporter .finished-at { padding-left: 1em; font-size: .6em; }
-#TrivialReporter.show-passed .passed, #TrivialReporter.show-skipped .skipped { display: block; }
-#TrivialReporter #jasmine_content { position: fixed; right: 100%; }
-#TrivialReporter .runner { border: 1px solid gray; display: block; margin: 5px 0; padding: 2px 0 2px 10px; }

inst/tests/test-bootstrap.r

@@ -1,45 +0,0 @@
-context("bootstrap")
-
-test_that("CSS unit validation", {
-  # On error, return NA; on success, return result
-  validateCssUnit_wrap <- function(x) {
-    tryCatch(validateCssUnit(x), error = function(e) { NA_character_ })
-  }
-
-  # Test strings and expected results
-  strings  <- c("100x", "10px", "10.4px", ".4px", "1px0", "px", "5",  "%", "5%", "auto", "1auto", "")
-  expected <- c(NA,     "10px", "10.4px", ".4px", NA,       NA, "5px", NA, "5%", "auto", NA,      NA)
-  results <- vapply(strings, validateCssUnit_wrap, character(1), USE.NAMES = FALSE)
-  expect_equal(results, expected)
-
-  # Numbers should return string with "px"
-  expect_equal(validateCssUnit(100), "100px")
-})
-
-
-test_that("Repeated names for selectInput and radioButtons choices", {
-  # These test might be a bit too closely tied to the exact structure of the
-  # tag object, but they get the job done for now.
-
-  # Select input
-  x <- selectInput('id','label', choices = c(a='x1', a='x2', b='x3'), selectize = FALSE)
-  expect_equal(format(x), '<label class="control-label" for="id">label</label>
-<select id="id"><option value="x1" selected>a</option>\n<option value="x2">a</option>\n<option value="x3">b</option></select>')
-
-
-  # Radio buttons
-  x <- radioButtons('id','label', choices = c(a='x1', a='x2', b='x3'))
-  choices <- x$children
-
-  expect_equal(choices[[2]][[1]]$children[[2]]$children[[1]], 'a')
-  expect_equal(choices[[2]][[1]]$children[[1]]$attribs$value, 'x1')
-  expect_equal(choices[[2]][[1]]$children[[1]]$attribs$checked, 'checked')
-
-  expect_equal(choices[[2]][[2]]$children[[2]]$children[[1]], 'a')
-  expect_equal(choices[[2]][[2]]$children[[1]]$attribs$value, 'x2')
-  expect_equal(choices[[2]][[2]]$children[[1]]$attribs$checked, NULL)
-
-  expect_equal(choices[[2]][[3]]$children[[2]]$children[[1]], 'b')
-  expect_equal(choices[[2]][[3]]$children[[1]]$attribs$value, 'x3')
-  expect_equal(choices[[2]][[3]]$children[[1]]$attribs$checked, NULL)
-})

inst/tests/test-tags.r

@@ -1,432 +0,0 @@
-context("tags")
-
-test_that("Basic tag writing works", {
-  expect_equal(as.character(tagList("hi")), HTML("hi"))
-  expect_equal(
-    as.character(tagList("one", "two", tagList("three"))),
-    HTML("one\ntwo\nthree"))
-  expect_equal(
-    as.character(tags$b("one")),
-    HTML("<b>one</b>"))
-  expect_equal(
-    as.character(tags$b("one", "two")),
-    HTML("<b>\n  one\n  two\n</b>"))
-  expect_equal(
-    as.character(tagList(list("one"))),
-    HTML("one"))
-  expect_equal(
-    as.character(tagList(list(tagList("one")))),
-    HTML("one"))
-  expect_equal(
-    as.character(tagList(tags$br(), "one")),
-    HTML("<br/>\none"))
-})
-
-
-test_that("withTags works", {
-  output_tags <- tags$div(class = "myclass",
-    tags$h3("header"),
-    tags$p("text here")
-  )
-  output_withhtml <- withTags(
-    div(class = "myclass",
-      h3("header"),
-      p("text here")
-    )
-  )
-  expect_identical(output_tags, output_withhtml)
-
-
-  # Check that current environment is searched
-  x <- 100
-  expect_identical(tags$p(x), withTags(p(x)))
-
-  # Just to make sure, run it in a function, which has its own environment
-  foo <- function() {
-    y <- 100
-    withTags(p(y))
-  }
-  expect_identical(tags$p(100), foo())
-})
-
-
-test_that("HTML escaping in tags", {
-  # Regular text is escaped
-  expect_equivalent(format(div("<a&b>")), "<div>&lt;a&amp;b&gt;</div>")
-
-  # Text in HTML() isn't escaped
-  expect_equivalent(format(div(HTML("<a&b>"))), "<div><a&b></div>")
-
-  # Text in a property is escaped
-  expect_equivalent(format(div(class = "<a&b>", "text")),
-                    '<div class="&lt;a&amp;b&gt;">text</div>')
-
-  # HTML() has no effect in a property like 'class'
-  expect_equivalent(format(div(class = HTML("<a&b>"), "text")),
-                    '<div class="&lt;a&amp;b&gt;">text</div>')
-})
-
-
-test_that("Adding child tags", {
-  tag_list <- list(tags$p("tag1"), tags$b("tag2"), tags$i("tag3"))
-
-  # Creating nested tags by calling the tag$div function and passing a list
-  t1 <- tags$div(class="foo", tag_list)
-  expect_equal(length(t1$children), 1)
-  expect_equal(length(t1$children[[1]]), 3)
-  expect_equal(t1$children[[1]][[1]]$name, "p")
-  expect_equal(t1$children[[1]][[1]]$children[[1]], "tag1")
-  expect_equal(t1$children[[1]][[2]]$name, "b")
-  expect_equal(t1$children[[1]][[2]]$children[[1]], "tag2")
-  expect_equal(t1$children[[1]][[3]]$name, "i")
-  expect_equal(t1$children[[1]][[3]]$children[[1]], "tag3")
-
-
-  # div tag used as starting point for tests below
-  div_tag <- tags$div(class="foo")
-
-  # Appending each child
-  t2 <- tagAppendChild(div_tag, tag_list[[1]])
-  t2 <- tagAppendChild(t2, tag_list[[2]])
-  t2 <- tagAppendChild(t2, tag_list[[3]])
-  t2a <- do.call(tags$div, c(tag_list, class="foo"))
-  expect_identical(t2a, t2)
-
-
-  # tagSetChildren, using list argument
-  t2 <- tagSetChildren(div_tag, list = tag_list)
-  expect_identical(t2a, t2)
-
-  # tagSetChildren, using ... arguments
-  t2 <- tagSetChildren(div_tag, tag_list[[1]], tag_list[[2]], tag_list[[3]])
-  expect_identical(t2a, t2)
-
-  # tagSetChildren, using ... and list arguments
-  t2 <- tagSetChildren(div_tag, tag_list[[1]], list = tag_list[2:3])
-  expect_identical(t2a, t2)
-
-  # tagSetChildren overwrites existing children
-  t2 <- tagAppendChild(div_tag, p("should replace this tag"))
-  t2 <- tagSetChildren(div_tag, list = tag_list)
-  expect_identical(t2a, t2)
-
-
-  # tagAppendChildren, using list argument
-  t2 <- tagAppendChild(div_tag, tag_list[[1]])
-  t2 <- tagAppendChildren(t2, list = tag_list[2:3])
-  expect_identical(t2a, t2)
-
-  # tagAppendChildren, using ... arguments
-  t2 <- tagAppendChild(div_tag, tag_list[[1]])
-  t2 <- tagAppendChildren(t2, tag_list[[2]], tag_list[[3]])
-  expect_identical(t2a, t2)
-
-  # tagAppendChildren, using ... and list arguments
-  t2 <- tagAppendChild(div_tag, tag_list[[1]])
-  t2 <- tagAppendChildren(t2, tag_list[[2]], list = list(tag_list[[3]]))
-  expect_identical(t2a, t2)
-
-  # tagAppendChildren can start with no children
-  t2 <- tagAppendChildren(div_tag, list = tag_list)
-  expect_identical(t2a, t2)
-
-
-  # tagSetChildren preserves attributes
-  x <- tagSetChildren(div(), HTML("text"))
-  expect_identical(attr(x$children[[1]], "html"), TRUE)
-
-  # tagAppendChildren preserves attributes
-  x <- tagAppendChildren(div(), HTML("text"))
-  expect_identical(attr(x$children[[1]], "html"), TRUE)
-})
-
-
-test_that("Creating simple tags", {
-  # Empty tag
-  expect_identical(
-    div(),
-    structure(
-      list(name = "div", attribs = list(), children = list()),
-      .Names = c("name", "attribs", "children"),
-      class = "shiny.tag"
-    )
-  )
-
-  # Tag with text
-  expect_identical(
-    div("text"),
-    structure(
-      list(name = "div", attribs = list(), children = list("text")),
-      .Names = c("name", "attribs", "children"),
-      class = "shiny.tag"
-    )
-  )
-
-  # NULL attributes are dropped
-  expect_identical(
-    div(a = NULL, b = "value"),
-    div(b = "value")
-  )
-
-  # NULL children are dropped
-  expect_identical(
-    renderTags(div("foo", NULL, list(NULL, list(NULL, "bar"))))$html,
-    renderTags(div("foo", "bar"))$html
-  )
-
-  # Numbers are coerced to strings
-  expect_identical(
-    renderTags(div(1234))$html,
-    renderTags(div("1234"))$html
-  )
-})
-
-
-test_that("Creating nested tags", {
-  # Simple version
-  # Note that the $children list should not have a names attribute
-  expect_identical(
-    div(class="foo", list("a", "b")),
-    structure(
-      list(name = "div",
-           attribs = structure(list(class = "foo"), .Names = "class"),
-           children = list(list("a", "b"))),
-      .Names = c("name", "attribs", "children"),
-      class = "shiny.tag"
-    )
-  )
-
-  # More complex version
-  t1 <- withTags(
-    div(class = "foo",
-      p("child tag"),
-      list(
-        p("in-list child tag 1"),
-        "in-list character string",
-        p(),
-        p("in-list child tag 2")
-      ),
-      "character string",
-      1234
-    )
-  )
-
-  # t1 should be identical to this data structure.
-  # The nested list should be flattened, and non-tag, non-strings should be
-  # converted to strings
-  t1_full <- structure(
-    list(
-      name = "div",
-      attribs = list(class = "foo"),
-      children = list(
-        structure(list(name = "p",
-                       attribs = list(),
-                       children = list("child tag")),
-                  class = "shiny.tag"
-        ),
-        structure(list(name = "p",
-                       attribs = list(),
-                       children = list("in-list child tag 1")),
-                  class = "shiny.tag"
-        ),
-        "in-list character string",
-        structure(list(name = "p",
-                       attribs = list(),
-                       children = list()),
-                  class = "shiny.tag"
-        ),
-        structure(list(name = "p",
-                       attribs = list(),
-                       children = list("in-list child tag 2")),
-                  class = "shiny.tag"
-        ),
-        "character string",
-        "1234"
-      )
-    ),
-    class = "shiny.tag"
-  )
-
-  expect_identical(renderTags(t1)$html, renderTags(t1_full)$html)
-})
-
-test_that("Attributes are preserved", {
-  # HTML() adds an attribute to the data structure (note that this is
-  # different from the 'attribs' field in the list)
-  x <- HTML("<tag>&&</tag>")
-  expect_identical(attr(x, "html"), TRUE)
-  expect_equivalent(format(x), "<tag>&&</tag>")
-
-  # Make sure attributes are preserved when wrapped in other tags
-  x <- div(HTML("<tag>&&</tag>"))
-  expect_equivalent(x$children[[1]], HTML("<tag>&&</tag>"))
-  expect_identical(attr(x$children[[1]], "html"), TRUE)
-  expect_equivalent(format(x), "<div><tag>&&</tag></div>")
-
-  # Deeper nesting
-  x <- div(p(HTML("<tag>&&</tag>")))
-  expect_equivalent(x$children[[1]]$children[[1]], HTML("<tag>&&</tag>"))
-  expect_identical(attr(x$children[[1]]$children[[1]], "html"), TRUE)
-  expect_equivalent(format(x), "<div>\n  <p><tag>&&</tag></p>\n</div>")
-})
-
-
-test_that("Flattening a list of tags", {
-  # Flatten a nested list
-  nested <- list(
-    "a1",
-    list(
-      "b1",
-      list("c1", "c2"),
-      list(),
-      "b2",
-      list("d1", "d2")
-    ),
-    "a2"
-  )
-  flat <- list("a1", "b1", "c1", "c2", "b2", "d1", "d2", "a2")
-  expect_identical(flattenTags(nested), flat)
-
-  # no-op for flat lists
-  expect_identical(flattenTags(list(a="1", "b")), list(a="1", "b"))
-
-  # numbers are coerced to character
-  expect_identical(flattenTags(list(a=1, "b")), list(a="1", "b"))
-
-  # empty list results in empty list
-  expect_identical(flattenTags(list()), list())
-
-  # preserve attributes
-  nested <- list("txt1", list(structure("txt2", prop="prop2")))
-  flat <- list("txt1",
-               structure("txt2", prop="prop2"))
-  expect_identical(flattenTags(nested), flat)
-})
-
-test_that("Head and singleton behavior", {
-  result <- renderTags(tagList(
-    tags$head(singleton("hello"))
-  ))
-
-  expect_identical(result$html, HTML(""))
-  expect_identical(result$head, HTML("  hello"))
-  expect_identical(result$singletons, "60eed8231e688bcba7c275c58dd2e3b4dacb61f0")
-
-  # Ensure that "hello" actually behaves like a singleton
-  result2 <- renderTags(tagList(
-    tags$head(singleton("hello"))
-  ), singletons = result$singletons)
-
-  expect_identical(result$singletons, result2$singletons)
-  expect_identical(result2$head, HTML(""))
-  expect_identical(result2$html, HTML(""))
-
-  result3 <- renderTags(tagList(
-    tags$head(singleton("hello"), singleton("hello"))
-  ))
-  expect_identical(result$singletons, result3$singletons)
-  expect_identical(result3$head, HTML("  hello"))
-
-  # Ensure that singleton can be applied to lists, not just tags
-  result4 <- renderTags(list(singleton(list("hello")), singleton(list("hello"))))
-  expect_identical(result4$singletons, "d7319e3f14167c4c056dd7aa0b274c83fe2291f6")
-  expect_identical(result4$html, renderTags(HTML("hello"))$html)
-})
-
-test_that("Factors are treated as characters, not numbers", {
-  myfactors <- factor(LETTERS[1:3])
-  expect_identical(
-    as.character(tags$option(value=myfactors[[1]], myfactors[[1]])),
-    HTML('<option value="A">A</option>')
-  )
-
-  expect_identical(
-    as.character(tags$option(value=myfactors[[1]], value='B', value=3, myfactors[[1]])),
-    HTML('<option value="A B 3">A</option>')
-  )
-})
-
-test_that("Unusual list contents are rendered correctly", {
-  expect_identical(renderTags(list(NULL)), renderTags(HTML("")))
-  expect_identical(renderTags(list(100)), renderTags(HTML("100")))
-  expect_identical(renderTags(list(list(100))), renderTags(HTML("100")))
-  expect_identical(renderTags(list(list())), renderTags(HTML("")))
-  expect_identical(renderTags(NULL), renderTags(HTML("")))
-})
-
-test_that("Low-level singleton manipulation methods", {
-  # Default arguments drop singleton duplicates and strips the
-  # singletons it keeps of the singleton bit
-  result1 <- takeSingletons(tags$div(
-    singleton(tags$head(tags$script("foo"))),
-    singleton(tags$head(tags$script("foo")))
-  ))
-
-  expect_identical(result1$ui$children[[2]], NULL)
-  expect_false(is(result1$ui$children[[1]], "shiny.singleton"))
-
-  # desingleton=FALSE means drop duplicates but don't strip the
-  # singleton bit
-  result2 <- takeSingletons(tags$div(
-    singleton(tags$head(tags$script("foo"))),
-    singleton(tags$head(tags$script("foo")))
-  ), desingleton=FALSE)
-
-  expect_identical(result2$ui$children[[2]], NULL)
-  expect_is(result2$ui$children[[1]], "shiny.singleton")
-
-  result3 <- surroundSingletons(tags$div(
-    singleton(tags$script("foo")),
-    singleton(tags$script("foo"))
-  ))
-
-  expect_identical(
-    renderTags(result3)$html,
-    HTML("<div>
-  <!--SHINY.SINGLETON[58b302d493b50acb75e4a5606687cadccdf902d8]-->
-  <script>foo</script>
-  <!--/SHINY.SINGLETON[58b302d493b50acb75e4a5606687cadccdf902d8]-->
-  <!--SHINY.SINGLETON[58b302d493b50acb75e4a5606687cadccdf902d8]-->
-  <script>foo</script>
-  <!--/SHINY.SINGLETON[58b302d493b50acb75e4a5606687cadccdf902d8]-->
-</div>")
-  )
-})
-
-test_that("Indenting can be controlled/suppressed", {
-  expect_identical(
-    renderTags(tags$div("a", "b"))$html,
-    HTML("<div>\n  a\n  b\n</div>")
-  )
-  expect_identical(
-    format(tags$div("a", "b")),
-    "<div>\n  a\n  b\n</div>"
-  )
-
-  expect_identical(
-    renderTags(tags$div("a", "b"), indent = 2)$html,
-    HTML("    <div>\n      a\n      b\n    </div>")
-  )
-  expect_identical(
-    format(tags$div("a", "b"), indent = 2),
-    "    <div>\n      a\n      b\n    </div>"
-  )
-
-  expect_identical(
-    renderTags(tags$div("a", "b"), indent = FALSE)$html,
-    HTML("<div>\na\nb\n</div>")
-  )
-  expect_identical(
-    format(tags$div("a", "b"), indent = FALSE),
-    "<div>\na\nb\n</div>"
-  )
-
-  expect_identical(
-    renderTags(tagList(tags$div("a", "b")), indent = FALSE)$html,
-    HTML("<div>\na\nb\n</div>")
-  )
-  expect_identical(
-    format(tagList(tags$div("a", "b")), indent = FALSE),
-    "<div>\na\nb\n</div>"
-  )
-})

inst/www-dir/index.html

@@ -7,6 +7,7 @@
   <ul>
     <li><code>www/index.html</code></li>
     <li><code>ui.R</code></li>
+    <li><code>app.R</code></li>
   </ul>
 </body>
 </html>

inst/www/shared/bootstrap/css/bootstrap-theme.css

@@ -0,0 +1,587 @@
+/*!
+ * Bootstrap v3.3.6 (http://getbootstrap.com)
+ * Copyright 2011-2015 Twitter, Inc.
+ * Licensed under MIT (https://github.com/twbs/bootstrap/blob/master/LICENSE)
+ */
+.btn-default,
+.btn-primary,
+.btn-success,
+.btn-info,
+.btn-warning,
+.btn-danger {
+  text-shadow: 0 -1px 0 rgba(0, 0, 0, .2);
+  -webkit-box-shadow: inset 0 1px 0 rgba(255, 255, 255, .15), 0 1px 1px rgba(0, 0, 0, .075);
+          box-shadow: inset 0 1px 0 rgba(255, 255, 255, .15), 0 1px 1px rgba(0, 0, 0, .075);
+}
+.btn-default:active,
+.btn-primary:active,
+.btn-success:active,
+.btn-info:active,
+.btn-warning:active,
+.btn-danger:active,
+.btn-default.active,
+.btn-primary.active,
+.btn-success.active,
+.btn-info.active,
+.btn-warning.active,
+.btn-danger.active {
+  -webkit-box-shadow: inset 0 3px 5px rgba(0, 0, 0, .125);
+          box-shadow: inset 0 3px 5px rgba(0, 0, 0, .125);
+}
+.btn-default.disabled,
+.btn-primary.disabled,
+.btn-success.disabled,
+.btn-info.disabled,
+.btn-warning.disabled,
+.btn-danger.disabled,
+.btn-default[disabled],
+.btn-primary[disabled],
+.btn-success[disabled],
+.btn-info[disabled],
+.btn-warning[disabled],
+.btn-danger[disabled],
+fieldset[disabled] .btn-default,
+fieldset[disabled] .btn-primary,
+fieldset[disabled] .btn-success,
+fieldset[disabled] .btn-info,
+fieldset[disabled] .btn-warning,
+fieldset[disabled] .btn-danger {
+  -webkit-box-shadow: none;
+          box-shadow: none;
+}
+.btn-default .badge,
+.btn-primary .badge,
+.btn-success .badge,
+.btn-info .badge,
+.btn-warning .badge,
+.btn-danger .badge {
+  text-shadow: none;
+}
+.btn:active,
+.btn.active {
+  background-image: none;
+}
+.btn-default {
+  text-shadow: 0 1px 0 #fff;
+  background-image: -webkit-linear-gradient(top, #fff 0%, #e0e0e0 100%);
+  background-image:      -o-linear-gradient(top, #fff 0%, #e0e0e0 100%);
+  background-image: -webkit-gradient(linear, left top, left bottom, from(#fff), to(#e0e0e0));
+  background-image:         linear-gradient(to bottom, #fff 0%, #e0e0e0 100%);
+  filter: progid:DXImageTransform.Microsoft.gradient(startColorstr='#ffffffff', endColorstr='#ffe0e0e0', GradientType=0);
+  filter: progid:DXImageTransform.Microsoft.gradient(enabled = false);
+  background-repeat: repeat-x;
+  border-color: #dbdbdb;
+  border-color: #ccc;
+}
+.btn-default:hover,
+.btn-default:focus {
+  background-color: #e0e0e0;
+  background-position: 0 -15px;
+}
+.btn-default:active,
+.btn-default.active {
+  background-color: #e0e0e0;
+  border-color: #dbdbdb;
+}
+.btn-default.disabled,
+.btn-default[disabled],
+fieldset[disabled] .btn-default,
+.btn-default.disabled:hover,
+.btn-default[disabled]:hover,
+fieldset[disabled] .btn-default:hover,
+.btn-default.disabled:focus,
+.btn-default[disabled]:focus,
+fieldset[disabled] .btn-default:focus,
+.btn-default.disabled.focus,
+.btn-default[disabled].focus,
+fieldset[disabled] .btn-default.focus,
+.btn-default.disabled:active,
+.btn-default[disabled]:active,
+fieldset[disabled] .btn-default:active,
+.btn-default.disabled.active,
+.btn-default[disabled].active,
+fieldset[disabled] .btn-default.active {
+  background-color: #e0e0e0;
+  background-image: none;
+}
+.btn-primary {
+  background-image: -webkit-linear-gradient(top, #337ab7 0%, #265a88 100%);
+  background-image:      -o-linear-gradient(top, #337ab7 0%, #265a88 100%);
+  background-image: -webkit-gradient(linear, left top, left bottom, from(#337ab7), to(#265a88));
+  background-image:         linear-gradient(to bottom, #337ab7 0%, #265a88 100%);
+  filter: progid:DXImageTransform.Microsoft.gradient(startColorstr='#ff337ab7', endColorstr='#ff265a88', GradientType=0);
+  filter: progid:DXImageTransform.Microsoft.gradient(enabled = false);
+  background-repeat: repeat-x;
+  border-color: #245580;
+}
+.btn-primary:hover,
+.btn-primary:focus {
+  background-color: #265a88;
+  background-position: 0 -15px;
+}
+.btn-primary:active,
+.btn-primary.active {
+  background-color: #265a88;
+  border-color: #245580;
+}
+.btn-primary.disabled,
+.btn-primary[disabled],
+fieldset[disabled] .btn-primary,
+.btn-primary.disabled:hover,
+.btn-primary[disabled]:hover,
+fieldset[disabled] .btn-primary:hover,
+.btn-primary.disabled:focus,
+.btn-primary[disabled]:focus,
+fieldset[disabled] .btn-primary:focus,
+.btn-primary.disabled.focus,
+.btn-primary[disabled].focus,
+fieldset[disabled] .btn-primary.focus,
+.btn-primary.disabled:active,
+.btn-primary[disabled]:active,
+fieldset[disabled] .btn-primary:active,
+.btn-primary.disabled.active,
+.btn-primary[disabled].active,
+fieldset[disabled] .btn-primary.active {
+  background-color: #265a88;
+  background-image: none;
+}
+.btn-success {
+  background-image: -webkit-linear-gradient(top, #5cb85c 0%, #419641 100%);
+  background-image:      -o-linear-gradient(top, #5cb85c 0%, #419641 100%);
+  background-image: -webkit-gradient(linear, left top, left bottom, from(#5cb85c), to(#419641));
+  background-image:         linear-gradient(to bottom, #5cb85c 0%, #419641 100%);
+  filter: progid:DXImageTransform.Microsoft.gradient(startColorstr='#ff5cb85c', endColorstr='#ff419641', GradientType=0);
+  filter: progid:DXImageTransform.Microsoft.gradient(enabled = false);
+  background-repeat: repeat-x;
+  border-color: #3e8f3e;
+}
+.btn-success:hover,
+.btn-success:focus {
+  background-color: #419641;
+  background-position: 0 -15px;
+}
+.btn-success:active,
+.btn-success.active {
+  background-color: #419641;
+  border-color: #3e8f3e;
+}
+.btn-success.disabled,
+.btn-success[disabled],
+fieldset[disabled] .btn-success,
+.btn-success.disabled:hover,
+.btn-success[disabled]:hover,
+fieldset[disabled] .btn-success:hover,
+.btn-success.disabled:focus,
+.btn-success[disabled]:focus,
+fieldset[disabled] .btn-success:focus,
+.btn-success.disabled.focus,
+.btn-success[disabled].focus,
+fieldset[disabled] .btn-success.focus,
+.btn-success.disabled:active,
+.btn-success[disabled]:active,
+fieldset[disabled] .btn-success:active,
+.btn-success.disabled.active,
+.btn-success[disabled].active,
+fieldset[disabled] .btn-success.active {
+  background-color: #419641;
+  background-image: none;
+}
+.btn-info {
+  background-image: -webkit-linear-gradient(top, #5bc0de 0%, #2aabd2 100%);
+  background-image:      -o-linear-gradient(top, #5bc0de 0%, #2aabd2 100%);
+  background-image: -webkit-gradient(linear, left top, left bottom, from(#5bc0de), to(#2aabd2));
+  background-image:         linear-gradient(to bottom, #5bc0de 0%, #2aabd2 100%);
+  filter: progid:DXImageTransform.Microsoft.gradient(startColorstr='#ff5bc0de', endColorstr='#ff2aabd2', GradientType=0);
+  filter: progid:DXImageTransform.Microsoft.gradient(enabled = false);
+  background-repeat: repeat-x;
+  border-color: #28a4c9;
+}
+.btn-info:hover,
+.btn-info:focus {
+  background-color: #2aabd2;
+  background-position: 0 -15px;
+}
+.btn-info:active,
+.btn-info.active {
+  background-color: #2aabd2;
+  border-color: #28a4c9;
+}
+.btn-info.disabled,
+.btn-info[disabled],
+fieldset[disabled] .btn-info,
+.btn-info.disabled:hover,
+.btn-info[disabled]:hover,
+fieldset[disabled] .btn-info:hover,
+.btn-info.disabled:focus,
+.btn-info[disabled]:focus,
+fieldset[disabled] .btn-info:focus,
+.btn-info.disabled.focus,
+.btn-info[disabled].focus,
+fieldset[disabled] .btn-info.focus,
+.btn-info.disabled:active,
+.btn-info[disabled]:active,
+fieldset[disabled] .btn-info:active,
+.btn-info.disabled.active,
+.btn-info[disabled].active,
+fieldset[disabled] .btn-info.active {
+  background-color: #2aabd2;
+  background-image: none;
+}
+.btn-warning {
+  background-image: -webkit-linear-gradient(top, #f0ad4e 0%, #eb9316 100%);
+  background-image:      -o-linear-gradient(top, #f0ad4e 0%, #eb9316 100%);
+  background-image: -webkit-gradient(linear, left top, left bottom, from(#f0ad4e), to(#eb9316));
+  background-image:         linear-gradient(to bottom, #f0ad4e 0%, #eb9316 100%);
+  filter: progid:DXImageTransform.Microsoft.gradient(startColorstr='#fff0ad4e', endColorstr='#ffeb9316', GradientType=0);
+  filter: progid:DXImageTransform.Microsoft.gradient(enabled = false);
+  background-repeat: repeat-x;
+  border-color: #e38d13;
+}
+.btn-warning:hover,
+.btn-warning:focus {
+  background-color: #eb9316;
+  background-position: 0 -15px;
+}
+.btn-warning:active,
+.btn-warning.active {
+  background-color: #eb9316;
+  border-color: #e38d13;
+}
+.btn-warning.disabled,
+.btn-warning[disabled],
+fieldset[disabled] .btn-warning,
+.btn-warning.disabled:hover,
+.btn-warning[disabled]:hover,
+fieldset[disabled] .btn-warning:hover,
+.btn-warning.disabled:focus,
+.btn-warning[disabled]:focus,
+fieldset[disabled] .btn-warning:focus,
+.btn-warning.disabled.focus,
+.btn-warning[disabled].focus,
+fieldset[disabled] .btn-warning.focus,
+.btn-warning.disabled:active,
+.btn-warning[disabled]:active,
+fieldset[disabled] .btn-warning:active,
+.btn-warning.disabled.active,
+.btn-warning[disabled].active,
+fieldset[disabled] .btn-warning.active {
+  background-color: #eb9316;
+  background-image: none;
+}
+.btn-danger {
+  background-image: -webkit-linear-gradient(top, #d9534f 0%, #c12e2a 100%);
+  background-image:      -o-linear-gradient(top, #d9534f 0%, #c12e2a 100%);
+  background-image: -webkit-gradient(linear, left top, left bottom, from(#d9534f), to(#c12e2a));
+  background-image:         linear-gradient(to bottom, #d9534f 0%, #c12e2a 100%);
+  filter: progid:DXImageTransform.Microsoft.gradient(startColorstr='#ffd9534f', endColorstr='#ffc12e2a', GradientType=0);
+  filter: progid:DXImageTransform.Microsoft.gradient(enabled = false);
+  background-repeat: repeat-x;
+  border-color: #b92c28;
+}
+.btn-danger:hover,
+.btn-danger:focus {
+  background-color: #c12e2a;
+  background-position: 0 -15px;
+}
+.btn-danger:active,
+.btn-danger.active {
+  background-color: #c12e2a;
+  border-color: #b92c28;
+}
+.btn-danger.disabled,
+.btn-danger[disabled],
+fieldset[disabled] .btn-danger,
+.btn-danger.disabled:hover,
+.btn-danger[disabled]:hover,
+fieldset[disabled] .btn-danger:hover,
+.btn-danger.disabled:focus,
+.btn-danger[disabled]:focus,
+fieldset[disabled] .btn-danger:focus,
+.btn-danger.disabled.focus,
+.btn-danger[disabled].focus,
+fieldset[disabled] .btn-danger.focus,
+.btn-danger.disabled:active,
+.btn-danger[disabled]:active,
+fieldset[disabled] .btn-danger:active,
+.btn-danger.disabled.active,
+.btn-danger[disabled].active,
+fieldset[disabled] .btn-danger.active {
+  background-color: #c12e2a;
+  background-image: none;
+}
+.thumbnail,
+.img-thumbnail {
+  -webkit-box-shadow: 0 1px 2px rgba(0, 0, 0, .075);
+          box-shadow: 0 1px 2px rgba(0, 0, 0, .075);
+}
+.dropdown-menu > li > a:hover,
+.dropdown-menu > li > a:focus {
+  background-color: #e8e8e8;
+  background-image: -webkit-linear-gradient(top, #f5f5f5 0%, #e8e8e8 100%);
+  background-image:      -o-linear-gradient(top, #f5f5f5 0%, #e8e8e8 100%);
+  background-image: -webkit-gradient(linear, left top, left bottom, from(#f5f5f5), to(#e8e8e8));
+  background-image:         linear-gradient(to bottom, #f5f5f5 0%, #e8e8e8 100%);
+  filter: progid:DXImageTransform.Microsoft.gradient(startColorstr='#fff5f5f5', endColorstr='#ffe8e8e8', GradientType=0);
+  background-repeat: repeat-x;
+}
+.dropdown-menu > .active > a,
+.dropdown-menu > .active > a:hover,
+.dropdown-menu > .active > a:focus {
+  background-color: #2e6da4;
+  background-image: -webkit-linear-gradient(top, #337ab7 0%, #2e6da4 100%);
+  background-image:      -o-linear-gradient(top, #337ab7 0%, #2e6da4 100%);
+  background-image: -webkit-gradient(linear, left top, left bottom, from(#337ab7), to(#2e6da4));
+  background-image:         linear-gradient(to bottom, #337ab7 0%, #2e6da4 100%);
+  filter: progid:DXImageTransform.Microsoft.gradient(startColorstr='#ff337ab7', endColorstr='#ff2e6da4', GradientType=0);
+  background-repeat: repeat-x;
+}
+.navbar-default {
+  background-image: -webkit-linear-gradient(top, #fff 0%, #f8f8f8 100%);
+  background-image:      -o-linear-gradient(top, #fff 0%, #f8f8f8 100%);
+  background-image: -webkit-gradient(linear, left top, left bottom, from(#fff), to(#f8f8f8));
+  background-image:         linear-gradient(to bottom, #fff 0%, #f8f8f8 100%);
+  filter: progid:DXImageTransform.Microsoft.gradient(startColorstr='#ffffffff', endColorstr='#fff8f8f8', GradientType=0);
+  filter: progid:DXImageTransform.Microsoft.gradient(enabled = false);
+  background-repeat: repeat-x;
+  border-radius: 4px;
+  -webkit-box-shadow: inset 0 1px 0 rgba(255, 255, 255, .15), 0 1px 5px rgba(0, 0, 0, .075);
+          box-shadow: inset 0 1px 0 rgba(255, 255, 255, .15), 0 1px 5px rgba(0, 0, 0, .075);
+}
+.navbar-default .navbar-nav > .open > a,
+.navbar-default .navbar-nav > .active > a {
+  background-image: -webkit-linear-gradient(top, #dbdbdb 0%, #e2e2e2 100%);
+  background-image:      -o-linear-gradient(top, #dbdbdb 0%, #e2e2e2 100%);
+  background-image: -webkit-gradient(linear, left top, left bottom, from(#dbdbdb), to(#e2e2e2));
+  background-image:         linear-gradient(to bottom, #dbdbdb 0%, #e2e2e2 100%);
+  filter: progid:DXImageTransform.Microsoft.gradient(startColorstr='#ffdbdbdb', endColorstr='#ffe2e2e2', GradientType=0);
+  background-repeat: repeat-x;
+  -webkit-box-shadow: inset 0 3px 9px rgba(0, 0, 0, .075);
+          box-shadow: inset 0 3px 9px rgba(0, 0, 0, .075);
+}
+.navbar-brand,
+.navbar-nav > li > a {
+  text-shadow: 0 1px 0 rgba(255, 255, 255, .25);
+}
+.navbar-inverse {
+  background-image: -webkit-linear-gradient(top, #3c3c3c 0%, #222 100%);
+  background-image:      -o-linear-gradient(top, #3c3c3c 0%, #222 100%);
+  background-image: -webkit-gradient(linear, left top, left bottom, from(#3c3c3c), to(#222));
+  background-image:         linear-gradient(to bottom, #3c3c3c 0%, #222 100%);
+  filter: progid:DXImageTransform.Microsoft.gradient(startColorstr='#ff3c3c3c', endColorstr='#ff222222', GradientType=0);
+  filter: progid:DXImageTransform.Microsoft.gradient(enabled = false);
+  background-repeat: repeat-x;
+  border-radius: 4px;
+}
+.navbar-inverse .navbar-nav > .open > a,
+.navbar-inverse .navbar-nav > .active > a {
+  background-image: -webkit-linear-gradient(top, #080808 0%, #0f0f0f 100%);
+  background-image:      -o-linear-gradient(top, #080808 0%, #0f0f0f 100%);
+  background-image: -webkit-gradient(linear, left top, left bottom, from(#080808), to(#0f0f0f));
+  background-image:         linear-gradient(to bottom, #080808 0%, #0f0f0f 100%);
+  filter: progid:DXImageTransform.Microsoft.gradient(startColorstr='#ff080808', endColorstr='#ff0f0f0f', GradientType=0);
+  background-repeat: repeat-x;
+  -webkit-box-shadow: inset 0 3px 9px rgba(0, 0, 0, .25);
+          box-shadow: inset 0 3px 9px rgba(0, 0, 0, .25);
+}
+.navbar-inverse .navbar-brand,
+.navbar-inverse .navbar-nav > li > a {
+  text-shadow: 0 -1px 0 rgba(0, 0, 0, .25);
+}
+.navbar-static-top,
+.navbar-fixed-top,
+.navbar-fixed-bottom {
+  border-radius: 0;
+}
+@media (max-width: 767px) {
+  .navbar .navbar-nav .open .dropdown-menu > .active > a,
+  .navbar .navbar-nav .open .dropdown-menu > .active > a:hover,
+  .navbar .navbar-nav .open .dropdown-menu > .active > a:focus {
+    color: #fff;
+    background-image: -webkit-linear-gradient(top, #337ab7 0%, #2e6da4 100%);
+    background-image:      -o-linear-gradient(top, #337ab7 0%, #2e6da4 100%);
+    background-image: -webkit-gradient(linear, left top, left bottom, from(#337ab7), to(#2e6da4));
+    background-image:         linear-gradient(to bottom, #337ab7 0%, #2e6da4 100%);
+    filter: progid:DXImageTransform.Microsoft.gradient(startColorstr='#ff337ab7', endColorstr='#ff2e6da4', GradientType=0);
+    background-repeat: repeat-x;
+  }
+}
+.alert {
+  text-shadow: 0 1px 0 rgba(255, 255, 255, .2);
+  -webkit-box-shadow: inset 0 1px 0 rgba(255, 255, 255, .25), 0 1px 2px rgba(0, 0, 0, .05);
+          box-shadow: inset 0 1px 0 rgba(255, 255, 255, .25), 0 1px 2px rgba(0, 0, 0, .05);
+}
+.alert-success {
+  background-image: -webkit-linear-gradient(top, #dff0d8 0%, #c8e5bc 100%);
+  background-image:      -o-linear-gradient(top, #dff0d8 0%, #c8e5bc 100%);
+  background-image: -webkit-gradient(linear, left top, left bottom, from(#dff0d8), to(#c8e5bc));
+  background-image:         linear-gradient(to bottom, #dff0d8 0%, #c8e5bc 100%);
+  filter: progid:DXImageTransform.Microsoft.gradient(startColorstr='#ffdff0d8', endColorstr='#ffc8e5bc', GradientType=0);
+  background-repeat: repeat-x;
+  border-color: #b2dba1;
+}
+.alert-info {
+  background-image: -webkit-linear-gradient(top, #d9edf7 0%, #b9def0 100%);
+  background-image:      -o-linear-gradient(top, #d9edf7 0%, #b9def0 100%);
+  background-image: -webkit-gradient(linear, left top, left bottom, from(#d9edf7), to(#b9def0));
+  background-image:         linear-gradient(to bottom, #d9edf7 0%, #b9def0 100%);
+  filter: progid:DXImageTransform.Microsoft.gradient(startColorstr='#ffd9edf7', endColorstr='#ffb9def0', GradientType=0);
+  background-repeat: repeat-x;
+  border-color: #9acfea;
+}
+.alert-warning {
+  background-image: -webkit-linear-gradient(top, #fcf8e3 0%, #f8efc0 100%);
+  background-image:      -o-linear-gradient(top, #fcf8e3 0%, #f8efc0 100%);
+  background-image: -webkit-gradient(linear, left top, left bottom, from(#fcf8e3), to(#f8efc0));
+  background-image:         linear-gradient(to bottom, #fcf8e3 0%, #f8efc0 100%);
+  filter: progid:DXImageTransform.Microsoft.gradient(startColorstr='#fffcf8e3', endColorstr='#fff8efc0', GradientType=0);
+  background-repeat: repeat-x;
+  border-color: #f5e79e;
+}
+.alert-danger {
+  background-image: -webkit-linear-gradient(top, #f2dede 0%, #e7c3c3 100%);
+  background-image:      -o-linear-gradient(top, #f2dede 0%, #e7c3c3 100%);
+  background-image: -webkit-gradient(linear, left top, left bottom, from(#f2dede), to(#e7c3c3));
+  background-image:         linear-gradient(to bottom, #f2dede 0%, #e7c3c3 100%);
+  filter: progid:DXImageTransform.Microsoft.gradient(startColorstr='#fff2dede', endColorstr='#ffe7c3c3', GradientType=0);
+  background-repeat: repeat-x;
+  border-color: #dca7a7;
+}
+.progress {
+  background-image: -webkit-linear-gradient(top, #ebebeb 0%, #f5f5f5 100%);
+  background-image:      -o-linear-gradient(top, #ebebeb 0%, #f5f5f5 100%);
+  background-image: -webkit-gradient(linear, left top, left bottom, from(#ebebeb), to(#f5f5f5));
+  background-image:         linear-gradient(to bottom, #ebebeb 0%, #f5f5f5 100%);
+  filter: progid:DXImageTransform.Microsoft.gradient(startColorstr='#ffebebeb', endColorstr='#fff5f5f5', GradientType=0);
+  background-repeat: repeat-x;
+}
+.progress-bar {
+  background-image: -webkit-linear-gradient(top, #337ab7 0%, #286090 100%);
+  background-image:      -o-linear-gradient(top, #337ab7 0%, #286090 100%);
+  background-image: -webkit-gradient(linear, left top, left bottom, from(#337ab7), to(#286090));
+  background-image:         linear-gradient(to bottom, #337ab7 0%, #286090 100%);
+  filter: progid:DXImageTransform.Microsoft.gradient(startColorstr='#ff337ab7', endColorstr='#ff286090', GradientType=0);
+  background-repeat: repeat-x;
+}
+.progress-bar-success {
+  background-image: -webkit-linear-gradient(top, #5cb85c 0%, #449d44 100%);
+  background-image:      -o-linear-gradient(top, #5cb85c 0%, #449d44 100%);
+  background-image: -webkit-gradient(linear, left top, left bottom, from(#5cb85c), to(#449d44));
+  background-image:         linear-gradient(to bottom, #5cb85c 0%, #449d44 100%);
+  filter: progid:DXImageTransform.Microsoft.gradient(startColorstr='#ff5cb85c', endColorstr='#ff449d44', GradientType=0);
+  background-repeat: repeat-x;
+}
+.progress-bar-info {
+  background-image: -webkit-linear-gradient(top, #5bc0de 0%, #31b0d5 100%);
+  background-image:      -o-linear-gradient(top, #5bc0de 0%, #31b0d5 100%);
+  background-image: -webkit-gradient(linear, left top, left bottom, from(#5bc0de), to(#31b0d5));
+  background-image:         linear-gradient(to bottom, #5bc0de 0%, #31b0d5 100%);
+  filter: progid:DXImageTransform.Microsoft.gradient(startColorstr='#ff5bc0de', endColorstr='#ff31b0d5', GradientType=0);
+  background-repeat: repeat-x;
+}
+.progress-bar-warning {
+  background-image: -webkit-linear-gradient(top, #f0ad4e 0%, #ec971f 100%);
+  background-image:      -o-linear-gradient(top, #f0ad4e 0%, #ec971f 100%);
+  background-image: -webkit-gradient(linear, left top, left bottom, from(#f0ad4e), to(#ec971f));
+  background-image:         linear-gradient(to bottom, #f0ad4e 0%, #ec971f 100%);
+  filter: progid:DXImageTransform.Microsoft.gradient(startColorstr='#fff0ad4e', endColorstr='#ffec971f', GradientType=0);
+  background-repeat: repeat-x;
+}
+.progress-bar-danger {
+  background-image: -webkit-linear-gradient(top, #d9534f 0%, #c9302c 100%);
+  background-image:      -o-linear-gradient(top, #d9534f 0%, #c9302c 100%);
+  background-image: -webkit-gradient(linear, left top, left bottom, from(#d9534f), to(#c9302c));
+  background-image:         linear-gradient(to bottom, #d9534f 0%, #c9302c 100%);
+  filter: progid:DXImageTransform.Microsoft.gradient(startColorstr='#ffd9534f', endColorstr='#ffc9302c', GradientType=0);
+  background-repeat: repeat-x;
+}
+.progress-bar-striped {
+  background-image: -webkit-linear-gradient(45deg, rgba(255, 255, 255, .15) 25%, transparent 25%, transparent 50%, rgba(255, 255, 255, .15) 50%, rgba(255, 255, 255, .15) 75%, transparent 75%, transparent);
+  background-image:      -o-linear-gradient(45deg, rgba(255, 255, 255, .15) 25%, transparent 25%, transparent 50%, rgba(255, 255, 255, .15) 50%, rgba(255, 255, 255, .15) 75%, transparent 75%, transparent);
+  background-image:         linear-gradient(45deg, rgba(255, 255, 255, .15) 25%, transparent 25%, transparent 50%, rgba(255, 255, 255, .15) 50%, rgba(255, 255, 255, .15) 75%, transparent 75%, transparent);
+}
+.list-group {
+  border-radius: 4px;
+  -webkit-box-shadow: 0 1px 2px rgba(0, 0, 0, .075);
+          box-shadow: 0 1px 2px rgba(0, 0, 0, .075);
+}
+.list-group-item.active,
+.list-group-item.active:hover,
+.list-group-item.active:focus {
+  text-shadow: 0 -1px 0 #286090;
+  background-image: -webkit-linear-gradient(top, #337ab7 0%, #2b669a 100%);
+  background-image:      -o-linear-gradient(top, #337ab7 0%, #2b669a 100%);
+  background-image: -webkit-gradient(linear, left top, left bottom, from(#337ab7), to(#2b669a));
+  background-image:         linear-gradient(to bottom, #337ab7 0%, #2b669a 100%);
+  filter: progid:DXImageTransform.Microsoft.gradient(startColorstr='#ff337ab7', endColorstr='#ff2b669a', GradientType=0);
+  background-repeat: repeat-x;
+  border-color: #2b669a;
+}
+.list-group-item.active .badge,
+.list-group-item.active:hover .badge,
+.list-group-item.active:focus .badge {
+  text-shadow: none;
+}
+.panel {
+  -webkit-box-shadow: 0 1px 2px rgba(0, 0, 0, .05);
+          box-shadow: 0 1px 2px rgba(0, 0, 0, .05);
+}
+.panel-default > .panel-heading {
+  background-image: -webkit-linear-gradient(top, #f5f5f5 0%, #e8e8e8 100%);
+  background-image:      -o-linear-gradient(top, #f5f5f5 0%, #e8e8e8 100%);
+  background-image: -webkit-gradient(linear, left top, left bottom, from(#f5f5f5), to(#e8e8e8));
+  background-image:         linear-gradient(to bottom, #f5f5f5 0%, #e8e8e8 100%);
+  filter: progid:DXImageTransform.Microsoft.gradient(startColorstr='#fff5f5f5', endColorstr='#ffe8e8e8', GradientType=0);
+  background-repeat: repeat-x;
+}
+.panel-primary > .panel-heading {
+  background-image: -webkit-linear-gradient(top, #337ab7 0%, #2e6da4 100%);
+  background-image:      -o-linear-gradient(top, #337ab7 0%, #2e6da4 100%);
+  background-image: -webkit-gradient(linear, left top, left bottom, from(#337ab7), to(#2e6da4));
+  background-image:         linear-gradient(to bottom, #337ab7 0%, #2e6da4 100%);
+  filter: progid:DXImageTransform.Microsoft.gradient(startColorstr='#ff337ab7', endColorstr='#ff2e6da4', GradientType=0);
+  background-repeat: repeat-x;
+}
+.panel-success > .panel-heading {
+  background-image: -webkit-linear-gradient(top, #dff0d8 0%, #d0e9c6 100%);
+  background-image:      -o-linear-gradient(top, #dff0d8 0%, #d0e9c6 100%);
+  background-image: -webkit-gradient(linear, left top, left bottom, from(#dff0d8), to(#d0e9c6));
+  background-image:         linear-gradient(to bottom, #dff0d8 0%, #d0e9c6 100%);
+  filter: progid:DXImageTransform.Microsoft.gradient(startColorstr='#ffdff0d8', endColorstr='#ffd0e9c6', GradientType=0);
+  background-repeat: repeat-x;
+}
+.panel-info > .panel-heading {
+  background-image: -webkit-linear-gradient(top, #d9edf7 0%, #c4e3f3 100%);
+  background-image:      -o-linear-gradient(top, #d9edf7 0%, #c4e3f3 100%);
+  background-image: -webkit-gradient(linear, left top, left bottom, from(#d9edf7), to(#c4e3f3));
+  background-image:         linear-gradient(to bottom, #d9edf7 0%, #c4e3f3 100%);
+  filter: progid:DXImageTransform.Microsoft.gradient(startColorstr='#ffd9edf7', endColorstr='#ffc4e3f3', GradientType=0);
+  background-repeat: repeat-x;
+}
+.panel-warning > .panel-heading {
+  background-image: -webkit-linear-gradient(top, #fcf8e3 0%, #faf2cc 100%);
+  background-image:      -o-linear-gradient(top, #fcf8e3 0%, #faf2cc 100%);
+  background-image: -webkit-gradient(linear, left top, left bottom, from(#fcf8e3), to(#faf2cc));
+  background-image:         linear-gradient(to bottom, #fcf8e3 0%, #faf2cc 100%);
+  filter: progid:DXImageTransform.Microsoft.gradient(startColorstr='#fffcf8e3', endColorstr='#fffaf2cc', GradientType=0);
+  background-repeat: repeat-x;
+}
+.panel-danger > .panel-heading {
+  background-image: -webkit-linear-gradient(top, #f2dede 0%, #ebcccc 100%);
+  background-image:      -o-linear-gradient(top, #f2dede 0%, #ebcccc 100%);
+  background-image: -webkit-gradient(linear, left top, left bottom, from(#f2dede), to(#ebcccc));
+  background-image:         linear-gradient(to bottom, #f2dede 0%, #ebcccc 100%);
+  filter: progid:DXImageTransform.Microsoft.gradient(startColorstr='#fff2dede', endColorstr='#ffebcccc', GradientType=0);
+  background-repeat: repeat-x;
+}
+.well {
+  background-image: -webkit-linear-gradient(top, #e8e8e8 0%, #f5f5f5 100%);
+  background-image:      -o-linear-gradient(top, #e8e8e8 0%, #f5f5f5 100%);
+  background-image: -webkit-gradient(linear, left top, left bottom, from(#e8e8e8), to(#f5f5f5));
+  background-image:         linear-gradient(to bottom, #e8e8e8 0%, #f5f5f5 100%);
+  filter: progid:DXImageTransform.Microsoft.gradient(startColorstr='#ffe8e8e8', endColorstr='#fff5f5f5', GradientType=0);
+  background-repeat: repeat-x;
+  border-color: #dcdcdc;
+  -webkit-box-shadow: inset 0 1px 3px rgba(0, 0, 0, .05), 0 1px 0 rgba(255, 255, 255, .1);
+          box-shadow: inset 0 1px 3px rgba(0, 0, 0, .05), 0 1px 0 rgba(255, 255, 255, .1);
+}
+/*# sourceMappingURL=bootstrap-theme.css.map */

inst/www/shared/bootstrap/fonts/glyphicons-halflings-regular.svg

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+<svg xmlns="http://www.w3.org/2000/svg">
+<metadata></metadata>
+<defs>
+<font id="glyphicons_halflingsregular" horiz-adv-x="1200" >
+<font-face units-per-em="1200" ascent="960" descent="-240" />
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