submit shiny 0.9.0 to CRAN

setTimeout() is necessary for uiOutput(); we need to wait for a short while before typesetting math, otherwise two bad things can happen:

1. a math expression may be rendered twice (static output)
2. it is not rendered at all (dynamic ui output)

so the compromise is to typeset math after a short while when the document is ready; 200 ms is an arbitrary choice here

.Rbuildignore

@@ -1,10 +1,13 @@
 ^\.Rproj\.user$
 ^\.git$
 ^examples$
-^README\.md$
 ^shiny\.Rproj$
 ^shiny\.sh$
 ^shiny\.cmd$
 ^run\.R$
 ^\.gitignore$
 ^res$
+^tools$
+^man-roxygen$
+^\.travis\.yml$
+^staticdocs$

.gitignore

@@ -6,4 +6,5 @@
 *.so
 /src-i386/
 /src-x86_64/
+shinyapps/
 README.html

.travis.yml

@@ -0,0 +1,26 @@
+# it is not really python, but there is no R support on Travis CI yet
+language: python
+
+# environment variables
+env:
+  - R_LIBS_USER=~/R R_MY_PKG="$(basename $TRAVIS_REPO_SLUG)"
+
+# install dependencies
+install:
+  - sudo apt-add-repository -y "deb http://cran.rstudio.com/bin/linux/ubuntu `lsb_release -cs`/"
+  - sudo apt-key adv --keyserver keyserver.ubuntu.com --recv-keys E084DAB9
+  - sudo apt-add-repository -y ppa:marutter/c2d4u
+  - sudo apt-get update
+  - sudo apt-get install r-base-dev r-cran-shiny r-cran-cairo r-cran-markdown
+  - "[ ! -d ~/R ] && mkdir ~/R"
+  - Rscript -e "install.packages('xtable', repos = 'http://cran.rstudio.org')"
+  - Rscript -e "install.packages('$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

DESCRIPTION

@@ -1,8 +1,8 @@
 Package: shiny
 Type: Package
 Title: Web Application Framework for R
-Version: 0.4.1
-Date: 2013-01-23
+Version: 0.9.0
+Date: 2014-03-18
 Author: RStudio, Inc.
 Maintainer: Winston Chang <winston@rstudio.com>
 Description: Shiny makes it incredibly easy to build interactive web
@@ -11,37 +11,46 @@ Description: Shiny makes it incredibly easy to build interactive web
     beautiful, responsive, and powerful applications with minimal effort.
 License: GPL-3
 Depends:
-    R (>= 2.14.1)
+    R (>= 2.14.1),
+    methods
 Imports:
     stats,
     tools,
     utils,
-    datasets,
-    methods,
-    websockets (>= 1.1.6),
+    httpuv (>= 1.2.0),
     caTools,
     RJSONIO,
     xtable,
     digest
 Suggests:
+    datasets,
     markdown,
-    Cairo,
+    Cairo (>= 1.5-5),
     testthat
 URL: http://www.rstudio.com/shiny/
 BugReports: https://github.com/rstudio/shiny/issues
 Collate:
-    'map.R'
-    'utils.R'
-    'tar.R'
-    'timer.R'
-    'tags.R'
+    'bootstrap-layout.R'
+    'bootstrap.R'
     'cache.R'
+    'map.R'
+    'fileupload.R'
+    'graph.R'
+    'hooks.R'
+    'imageutils.R'
+    'jqueryui.R'
+    'priorityqueue.R'
     'react.R'
     'reactives.R'
-    'fileupload.R'
-    'shiny.R'
-    'shinywrappers.R'
-    'shinyui.R'
-    'slider.R'
-    'bootstrap.R'
     'run-url.R'
+    'sessioncontext.R'
+    'utils.R'
+    'shiny.R'
+    'shinyui.R'
+    'shinywrappers.R'
+    'showcase.R'
+    'slider.R'
+    'tags.R'
+    'tar.R'
+    'timer.R'
+    'update-input.R'

NAMESPACE

@@ -1,3 +1,5 @@
+# Generated by roxygen2 (4.0.0): do not edit by hand
+
 S3method("$",reactivevalues)
 S3method("$",shinyoutput)
 S3method("$<-",reactivevalues)
@@ -14,21 +16,31 @@ S3method("names<-",reactivevalues)
 S3method(as.character,shiny.tag)
 S3method(as.character,shiny.tag.list)
 S3method(as.list,reactivevalues)
+S3method(format,html)
 S3method(format,shiny.tag)
 S3method(format,shiny.tag.list)
 S3method(names,reactivevalues)
+S3method(print,html)
+S3method(print,reactive)
 S3method(print,shiny.tag)
 S3method(print,shiny.tag.list)
 export(HTML)
 export(a)
+export(absolutePanel)
+export(actionButton)
 export(addResourcePath)
 export(animationOptions)
+export(basicPage)
 export(bootstrapPage)
 export(br)
 export(checkboxGroupInput)
 export(checkboxInput)
 export(code)
+export(column)
 export(conditionalPanel)
+export(dataTableOutput)
+export(dateInput)
+export(dateRangeInput)
 export(div)
 export(downloadButton)
 export(downloadHandler)
@@ -36,6 +48,11 @@ export(downloadLink)
 export(em)
 export(exprToFunction)
 export(fileInput)
+export(fixedPage)
+export(fixedPanel)
+export(fixedRow)
+export(fluidPage)
+export(fluidRow)
 export(h1)
 export(h2)
 export(h3)
@@ -44,24 +61,40 @@ export(h5)
 export(h6)
 export(headerPanel)
 export(helpText)
+export(hr)
 export(htmlOutput)
+export(icon)
+export(imageOutput)
 export(img)
+export(includeCSS)
 export(includeHTML)
 export(includeMarkdown)
+export(includeScript)
 export(includeText)
+export(installExprFunction)
 export(invalidateLater)
+export(is.reactive)
+export(is.reactivevalues)
 export(isolate)
 export(mainPanel)
+export(makeReactiveBinding)
+export(navbarMenu)
+export(navbarPage)
+export(navlistPanel)
 export(numericInput)
 export(observe)
 export(outputOptions)
 export(p)
 export(pageWithSidebar)
+export(parseQueryString)
 export(plotOutput)
+export(plotPNG)
 export(pre)
 export(radioButtons)
 export(reactive)
+export(reactiveFileReader)
 export(reactivePlot)
+export(reactivePoll)
 export(reactivePrint)
 export(reactiveTable)
 export(reactiveText)
@@ -69,6 +102,10 @@ export(reactiveTimer)
 export(reactiveUI)
 export(reactiveValues)
 export(reactiveValuesToList)
+export(registerInputHandler)
+export(removeInputHandler)
+export(renderDataTable)
+export(renderImage)
 export(renderPlot)
 export(renderPrint)
 export(renderTable)
@@ -81,28 +118,51 @@ export(runGist)
 export(runGitHub)
 export(runUrl)
 export(selectInput)
+export(selectizeInput)
 export(shinyServer)
 export(shinyUI)
+export(showReactLog)
+export(sidebarLayout)
 export(sidebarPanel)
 export(singleton)
 export(sliderInput)
 export(span)
+export(stopApp)
 export(strong)
 export(submitButton)
 export(tabPanel)
 export(tableOutput)
 export(tabsetPanel)
 export(tag)
+export(tagAppendAttributes)
 export(tagAppendChild)
+export(tagAppendChildren)
 export(tagList)
+export(tagSetChildren)
 export(tags)
 export(textInput)
 export(textOutput)
+export(titlePanel)
 export(uiOutput)
+export(updateCheckboxGroupInput)
+export(updateCheckboxInput)
+export(updateDateInput)
+export(updateDateRangeInput)
+export(updateNumericInput)
+export(updateRadioButtons)
+export(updateSelectInput)
+export(updateSliderInput)
+export(updateTabsetPanel)
+export(updateTextInput)
+export(validateCssUnit)
 export(verbatimTextOutput)
+export(verticalLayout)
 export(wellPanel)
+export(withMathJax)
+export(withTags)
 import(RJSONIO)
 import(caTools)
 import(digest)
-import(websockets)
+import(httpuv)
+import(methods)
 import(xtable)

NEWS

@@ -1,3 +1,298 @@
+shiny 0.9.0
+--------------------------------------------------------------------------------
+
+* BREAKING CHANGE: Added a `host` parameter to runApp() and runExample(),
+  which defaults to the shiny.host option if it is non-NULL, or "127.0.0.1"
+  otherwise. This means that by default, Shiny applications can only be
+  accessed on the same machine from which they are served. To allow other
+  clients to connect, as in previous versions of Shiny, use "0.0.0.0"
+  (or the IP address of one of your network interfaces, if you care to be
+  explicit about it).
+
+* Added a new function `selectizeInput()` to use the JavaScript library
+  selectize.js (https://github.com/brianreavis/selectize.js), which extends
+  the basic select input in many aspects.
+
+* The `selectInput()` function also gained a new argument `selectize = TRUE`
+  to makes use of selectize.js by default. If you want to revert back to the
+  original select input, you have to call selectInput(..., selectize = FALSE).
+
+* Added Showcase mode, which displays the R code for an app right in the app
+  itself. You can invoke Showcase mode by passing `display.mode="showcase"`
+  to the `runApp()` function. Or, if an app is designed to run in Showcase
+  mode by default, add a DESCRIPTION file in the app dir with Title, Author,
+  and License fields; with "Type: Shiny"; and with "DisplayMode: Showcase".
+
+* Upgraded to Bootstrap 2.3.2 and jQuery 1.11.0.
+
+* Make `tags$head()` and `singleton()` behave correctly when used with
+  `renderUI()` and `uiOutput()`. Previously, "hoisting content to the head"
+  and "only rendering items a single time" were features that worked only
+  when the page was initially loading, not in dynamic rendering.
+
+* Files are now sourced with the `keep.source` option, to help with debugging
+  and profiling.
+
+* Support user-defined input parsers for data coming in from JavaScript using
+  the parseShinyInput method.
+
+* Fixed the bug #299: renderDataTable() can deal with 0-row data frames now.
+  (reported by Harlan Harris)
+
+* Added `navbarPage()` and `navbarMenu()` functions to create applications
+  with multiple top level panels.
+
+* Added `navlistPanel()` function to create layouts with a a bootstrap
+  navlist on the left and tabPanels on the right
+
+* Added `type` parameter to `tabsetPanel()` to enable the use of pill
+  style tabs in addition to the standard ones.
+
+* Added `position` paramter to `tabsetPanel()` to enable positioning of tabs
+  above, below, left, or right of tab content.
+
+* Added `fluidPage()` and `fixedPage()` functions as well as related row and
+  column layout functions for creating arbitrary bootstrap grid layouts.
+
+* Added `hr()` builder function for creating horizontal rules.
+
+* Automatically concatenate duplicate attributes in tag definitions
+
+* Added `responsive` parameter to page building functions for opting-out of
+  bootstrap responsive css.
+
+* Added `theme` parameter to page building functions for specifying alternate
+  bootstrap css styles.
+
+* Added `icon()` function for embedding icons from the
+  [font awesome](http://fontawesome.io/) icon library
+
+* Added `makeReactiveBinding` function to turn a "regular" variable into a
+  reactive one (i.e. reading the variable makes the current reactive context
+  dependent on it, and setting the variable is a source of reactivity).
+
+* Added a function `withMathJax()` to include the MathJax library in an app.
+
+* The argument `selected` in checkboxGroupInput(), selectInput(), and
+  radioButtons() refers to the value(s) instead of the name(s) of the
+  argument `choices` now. For example, the value of the `selected` argument
+  in selectInput(..., choices = c('Label 1' = 'x1', 'Label 2' = 'x2'),
+  selected = 'Label 2') must be updated to 'x2', although names/labels will
+  be automatically converted to values internally for backward
+  compatibility. The same change applies to updateCheckboxGroupInput(),
+  updateSelectInput(), and updateRadioButtons() as well. (#340)
+
+* Now it is possible to only update the value of a checkbox group, select input,
+  or radio buttons using the `selected` argument without providing the
+  `choices` argument in updateCheckboxGroupInput(), updateSelectInput(), and
+  updateRadioButtons(), respectively. (#340)
+
+* Added `absolutePanel` and `fixedPanel` functions for creating absolute-
+  and fixed-position panels. They can be easily made user-draggable by
+  specifying `draggable = TRUE`.
+
+* For the `options` argument of the function `renderDataTable()`, we can
+  pass literal JavaScript code to the DataTables library via `I()`. This
+  makes it possible to use any JavaScript object in the options, e.g. a
+  JavaScript function (which is not supported in JSON). See
+  `?renderDataTable` for details and examples.
+
+* DataTables also works under IE8 now.
+
+* Fixed a bug in DataTables pagination when searching is turned on, which
+  caused failures for matrices as well as empty rows when displaying data
+  frames using renderDataTable().
+
+* The `options` argument in `renderDataTable()` can also take a function
+  that returns a list. This makes it possible to use reactive values in the
+  options. (#392)
+
+* `renderDataTable()` respects more DataTables options now: (1) either
+  bPaginate = FALSE or iDisplayLength = -1 will disable pagination (i.e. all
+  rows are returned from the data); besides, this means we can also use -1
+  in the length menu, e.g. aLengthMenu = list(c(10, 30, -1), list(10, 30,
+  'All')); (2) we can disable searching for individual columns through the
+  bSearchable option, e.g. aoColumns = list(list(bSearchable = FALSE),
+  list(bSearchable = TRUE),...) (the search box for the first column is
+  hidden); (3) we can turn off searching entirely (for both global searching
+  and individual columns) using the option bFilter = FALSE.
+
+* Added an argument `callback` in `renderDataTable()` so that a custom
+  JavaScript function can be applied to the DataTable object. This makes it
+  much easier to use DataTables plug-ins.
+
+* For numeric columns in a DataTable, the search boxes support lower and
+  upper bounds now: a search query of the form "lower,upper" (without
+  quotes) indicates the limits [lower, upper]. For a column X, this means
+  the rows corresponding to X >= lower & X <= upper are returned. If we omit
+  either the lower limit or the upper limit, only the other limit will be
+  used, e.g. ",upper" means X <= upper.
+
+* `updateNumericInput(value)` tries to preserve numeric precision by avoiding
+  scientific notation when possible, e.g. 102145 is no longer rounded to
+  1.0214e+05 = 102140. (Thanks, Martin Loos. #401)
+
+* `sliderInput()` no longer treats a label wrapped in HTML() as plain text,
+  e.g. the label in sliderInput(..., label = HTML('<em>A Label</em>')) will
+  not be escaped any more. (#119)
+
+* Fixed #306: the trailing slash in a path could fail `addResourcePath()`
+  under Windows. (Thanks, ZJ Dai)
+
+* Dots are now legal characters for inputId/outputId. (Thanks, Kevin
+  Lindquist. #358)
+
+shiny 0.8.0
+--------------------------------------------------------------------------------
+
+* Debug hooks are registered on all user-provided functions and (reactive)
+  expressions (e.g., in renderPlot()), which makes it possible to set
+  breakpoints in these functions using the latest version of the RStudio
+  IDE, and the RStudio visual debugging tools can be used to debug Shiny
+  apps. Internally, the registration is done via installExprFunction(),
+  which is a new function introduced in this version to replace
+  exprToFunction() so that the registration can be automatically done.
+
+* Added a new function renderDataTable() to display tables using the
+  JavaScript library DataTables. It includes basic features like pagination,
+  searching (global search or search by individual columns), sorting (by
+  single or multiple columns). All these features are implemented on the R
+  side; for example, we can use R regular expressions for searching.
+  Besides, it also uses the Bootstrap CSS style. See the full
+  documentation and examples in the tutorial:
+  http://rstudio.github.io/shiny/tutorial/#datatables
+
+* Added a new option `shiny.error` which can take a function as an error
+  handler. It is called when an error occurs in an app (in user-provided
+  code), e.g., after we set options(shiny.error = recover), we can enter a
+  specified environment in the call stack to debug our code after an error
+  occurs.
+
+* The argument `launch.browser` in runApp() can also be a function,
+  which takes the URL of the shiny app as its input value.
+
+* runApp() uses a random port between 3000 and 8000 instead of 8100 now. It
+  will try up to 20 ports in case certain ports are not available.
+
+* Fixed a bug for conditional panels: the value `input.id` in the condition
+  was not correctly retrieved when the input widget had a type, such as
+  numericInput(). (reported by Jason Bryer)
+
+* Fixed two bugs in plotOutput(); clickId and hoverId did not give correct
+  coordinates in Firefox, or when the axis limits of the plot were changed.
+  (reported by Chris Warth and Greg D)
+
+* The minimal required version for the httpuv package was increased to 1.2
+  (on CRAN now).
+
+
+shiny 0.7.0
+--------------------------------------------------------------------------------
+
+* Stopped sending websocket subprotocol. This fixes a compatibility issue with
+  Google Chrome 30.
+
+* The `input` and `output` objects are now also accessible via `session$input`
+  and `session$output`.
+
+* Added click and hover events for static plots; see `?plotOutput` for details.
+
+* Added optional logging of the execution states of a reactive program, and
+  tools for visualizing the log data. To use, start a new R session and call
+  `options(shiny.reactlog=TRUE)`. Then launch a Shiny app and interact with it.
+  Press Ctrl+F3 (or for Mac, Cmd+F3) in the browser to launch an interactive
+  visualization of the reactivity that has occurred. See `?showReactLog` for
+  more information.
+
+* Added `includeScript()` and `includeCSS()` functions.
+
+* Reactive expressions now have class="reactive" attribute. Also added
+  `is.reactive()` and `is.reactivevalues()` functions.
+
+* New `stopApp()` function, which stops an app and returns a value to the caller
+  of `runApp()`.
+
+* Added the `shiny.usecairo` option, which can be used to tell Shiny not to use
+  Cairo for PNG output even when it is installed. (Defaults to `TRUE`.)
+
+* Speed increases for `selectInput()` and `radioButtons()`, and their
+  corresponding updater functions, for when they have many options.
+
+* Added `tagSetChildren()` and `tagAppendChildren()` functions.
+
+* The HTTP request object that created the websocket is now accessible from the
+  `session` object, as `session$request`. This is a Rook-like request
+  environment that can be used to access HTTP headers, among other things.
+  (Note: When running in a Shiny Server environment, the request will reflect
+  the proxy HTTP request that was made from the Shiny Server process to the R
+  process, not the request that was made from the web browser to Shiny Server.)
+
+* Fix `getComputedStyle` issue, for IE8 browser compatibility (#196). Note:
+  Shiny Server is still required for IE8/9 compatibility.
+
+* Add shiny.sharedSecret option, to require the HTTP header Shiny-Shared-Secret
+  to be set to the given value.
+
+shiny 0.6.0
+--------------------------------------------------------------------------------
+
+* `tabsetPanel()` can be directed to start with a specific tab selected.
+
+* Fix bug where multiple file uploads with 3 or more files result in incorrect
+  data.
+
+* Add `withTags()` function.
+
+* Add dateInput and dateRangeInput.
+
+* `shinyServer()` now takes an optional `session` argument, which is used for
+  communication with the session object.
+
+* Add functions to update values of existing inputs on a page, instead of
+  replacing them entirely.
+
+* Allow listening on domain sockets.
+
+* Added `actionButton()` to Shiny.
+
+* The server can now send custom JSON messages to the client. On the client
+  side, functions can be registered to handle these messages.
+
+* Callbacks can be registered to be called at the end of a client session.
+
+* Add ability to set priority of observers and outputs. Each priority level
+  gets its own queue.
+
+* Fix bug where the presence of a submit button would prevent sending of
+  metadata until the button was clicked.
+
+* `reactiveTimer()` and `invalidateLater()` by default no longer invalidate
+  reactive objects after the client session has closed.
+
+* Shiny apps can be run without a server.r and ui.r file.
+
+shiny 0.5.0
+--------------------------------------------------------------------------------
+
+* Switch from websockets package for handling websocket connections to httpuv.
+
+* New method for detecting hidden output objects. Instead of checking that
+  height and width are 0, it checks that the object or any ancestor in the DOM
+  has style display:none.
+
+* Add `clientData` reactive values object, which carries information about the
+  client. This includes the hidden status of output objects, height/width plot
+  output objects, and the URL of the browser.
+
+* Add `parseQueryString()` function.
+
+* Add `renderImage()` function for sending arbitrary image files to the client,
+  and its counterpart, `imageOutput()`.
+
+* Add support for high-resolution (Retina) displays.
+
+* Fix bug #55, where `renderTable()` would throw error with an empty data frame.
+
 shiny 0.4.1
 --------------------------------------------------------------------------------
 
@@ -162,7 +457,7 @@ shiny 0.1.8
 * Fix issue #27: Warnings cause reactive functions to stop executing.
 * The server.R and ui.R filenames are now case insensitive.
 * Add `wellPanel` function for creating inset areas on the page.
-* Add `bootstrapPage` function for creating new Twitter Bootstrap based
+* Add `bootstrapPage` function for creating new Bootstrap based
   layouts from scratch.
 
 
@@ -224,11 +519,11 @@ shiny 0.1.3
   creating custom input controls
 * Add `step` parameter to numericInput
 * Read names of input using `names(input)`
-* Access snapshot of input as a list using `as.list(input)` 
+* Access snapshot of input as a list using `as.list(input)`
 * Fix issue #10: Plots in tabsets not rendered
 
 
 shiny 0.1.2
 --------------------------------------------------------------------------------
 
-Initial private beta release!
+Initial private beta release!

R/bootstrap-layout.R

@@ -0,0 +1,310 @@
+
+#' Create a page with fluid layout
+#'
+#' Functions for creating fluid page layouts. A fluid page layout consists of
+#' rows which in turn include columns. Rows exist for the purpose of making sure
+#' their elements appear on the same line (if the browser has adequate width).
+#' Columns exist for the purpose of defining how much horizontal space within a
+#' 12-unit wide grid it's elements should occupy. Fluid pages scale their
+#' components in realtime to fill all available browser width.
+#'
+#' @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 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"}.
+#'
+#' @return A UI defintion that can be passed to the \link{shinyUI} function.
+#'
+#' @details To create a fluid page use the \code{fluidPage} function and include
+#'   instances of \code{fluidRow} and \code{\link{column}} within it. As an
+#'   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
+#'   pages.
+#'
+#' @seealso \code{\link{column}}, \code{\link{sidebarLayout}}
+#'
+#' @examples
+#' shinyUI(fluidPage(
+#'
+#'   # Application title
+#'   titlePanel("Hello Shiny!"),
+#'
+#'   sidebarLayout(
+#'
+#'     # Sidebar with a slider input
+#'     sidebarPanel(
+#'       sliderInput("obs",
+#'                   "Number of observations:",
+#'                   min = 0,
+#'                   max = 1000,
+#'                   value = 500)
+#'     ),
+#'
+#'     # Show a plot of the generated distribution
+#'     mainPanel(
+#'       plotOutput("distPlot")
+#'     )
+#'   )
+#' ))
+#'
+#' shinyUI(fluidPage(
+#'   title = "Hello Shiny!",
+#'   fluidRow(
+#'     column(width = 4,
+#'       "4"
+#'     ),
+#'     column(width = 3, offset = 2,
+#'       "3 offset 2"
+#'     )
+#'   )
+#' ))
+#'
+#' @rdname fluidPage
+#' @export
+fluidPage <- function(..., title = NULL, responsive = TRUE, theme = NULL) {
+  bootstrapPage(div(class = "container-fluid", ...),
+                title = title,
+                responsive = responsive,
+                theme = theme)
+}
+
+
+#' @rdname fluidPage
+#' @export
+fluidRow <- function(...) {
+  div(class = "row-fluid", ...)
+}
+
+#' Create a page with a fixed layout
+#'
+#' Functions for creating fixed page layouts. A fixed page layout consists of
+#' rows which in turn include columns. Rows exist for the purpose of making sure
+#' their elements appear on the same line (if the browser has adequate width).
+#' Columns exist for the purpose of defining how much horizontal space within a
+#' 12-unit wide grid it's elements should occupy. Fixed pages limit their width
+#' to 940 pixels on a typical display, and 724px or 1170px on smaller and larger
+#' displays respectively.
+#'
+#' @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 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"}.
+#'
+#' @return A UI defintion that can be passed to the \link{shinyUI} function.
+#'
+#' @details To create a fixed page use the \code{fixedPage} function and include
+#'   instances of \code{fixedRow} and \code{\link{column}} within it. Note that
+#'   unlike \code{\link{fluidPage}}, fixed pages cannot make use of higher-level
+#'   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}{
+#'   Shiny Application Layout Guide} for additional details on laying out fixed
+#'   pages.
+#'
+#' @seealso \code{\link{column}}
+#'
+#' @examples
+#' shinyUI(fixedPage(
+#'   title = "Hello, Shiny!",
+#'   fixedRow(
+#'     column(width = 4,
+#'       "4"
+#'     ),
+#'     column(width = 3, offset = 2,
+#'       "3 offset 2"
+#'     )
+#'   )
+#' ))
+#'
+#' @rdname fixedPage
+#' @export
+fixedPage <- function(..., title = NULL, responsive = TRUE, theme = NULL) {
+  bootstrapPage(div(class = "container", ...),
+                title = title,
+                responsive = responsive,
+                theme = theme)
+}
+
+#' @rdname fixedPage
+#' @export
+fixedRow <- function(...) {
+  div(class = "row", ...)
+}
+
+
+#' Create a column within a UI definition
+#'
+#' Create a column for use within a  \code{\link{fluidRow}} or
+#' \code{\link{fixedRow}}
+#'
+#' @param width The grid width of the column (must be between 1 and 12)
+#' @param ... Elements to include within the column
+#' @param offset The number of columns to offset this column from the end of the
+#'   previous column.
+#'
+#' @return A column that can be included within a
+#'   \code{\link{fluidRow}} or \code{\link{fixedRow}}.
+#'
+#'
+#' @seealso \code{\link{fluidRow}}, \code{\link{fixedRow}}.
+#'
+#' @examples
+#' fluidRow(
+#'   column(4,
+#'     sliderInput("obs", "Number of observations:",
+#'                 min = 1, max = 1000, value = 500)
+#'   ),
+#'   column(8,
+#'     plotOutput("distPlot")
+#'   )
+#' )
+#'
+#' fluidRow(
+#'   column(width = 4,
+#'     "4"
+#'   ),
+#'   column(width = 3, offset = 2,
+#'     "3 offset 2"
+#'   )
+#' )
+#' @export
+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)
+  if (offset > 0)
+    colClass <- paste0(colClass, " offset", offset)
+  div(class = colClass, ...)
+}
+
+
+#' Create a panel containing an application title.
+#'
+#' @param title An application title to display
+#' @param windowTitle The title that should be displayed by the browser window.
+#'
+#' @details Calling this function has the side effect of including a
+#'   \code{title} tag within the head. You can also specify a page title
+#'   explicitly using the `title` parameter of the top-level page function.
+#'
+#'
+#' @examples
+#' titlePanel("Hello Shiny!")
+#'
+#' @export
+titlePanel <- function(title, windowTitle=title) {
+  tagList(
+    tags$head(tags$title(windowTitle)),
+    h2(style = "padding: 10px 0px;", title)
+  )
+}
+
+#' Layout a sidebar and main area
+#'
+#' Create a layout with a sidebar and main area. The sidebar is displayed with a
+#' distinct background color and typically contains input controls. The main
+#' area occupies 2/3 of the horizontal width and typically contains outputs.
+#'
+#' @param sidebarPanel The \link{sidebarPanel} containing input controls
+#' @param mainPanel The \link{mainPanel} containing outputs
+#' @param position The position of the sidebar relative to the main area ("left"
+#'   or "right")
+#' @param fluid \code{TRUE} to use fluid layout; \code{FALSE} to use fixed
+#'   layout.
+#'
+#' @examples
+#' # Define UI
+#' shinyUI(fluidPage(
+#'
+#'   # Application title
+#'   titlePanel("Hello Shiny!"),
+#'
+#'   sidebarLayout(
+#'
+#'     # Sidebar with a slider input
+#'     sidebarPanel(
+#'       sliderInput("obs",
+#'                   "Number of observations:",
+#'                   min = 0,
+#'                   max = 1000,
+#'                   value = 500)
+#'     ),
+#'
+#'     # Show a plot of the generated distribution
+#'     mainPanel(
+#'       plotOutput("distPlot")
+#'     )
+#'   )
+#' ))
+#'
+#' @export
+sidebarLayout <- function(sidebarPanel,
+                          mainPanel,
+                          position = c("left", "right"),
+                          fluid = TRUE) {
+
+  # determine the order
+  position <- match.arg(position)
+  if (position == "left") {
+    firstPanel <- sidebarPanel
+    secondPanel <- mainPanel
+  }
+  else if (position == "right") {
+    firstPanel <- mainPanel
+    secondPanel <- sidebarPanel
+  }
+
+  # return as as row
+  if (fluid)
+    fluidRow(firstPanel, secondPanel)
+  else
+    fixedRow(firstPanel, secondPanel)
+}
+
+#' Layout UI elements vertically
+#'
+#' Create a container that includes one or more rows of content (each element
+#' passed to the container will appear on it's own line in the UI)
+#'
+#' @param ... Elements to include within the container
+#' @param fluid \code{TRUE} to use fluid layout; \code{FALSE} to use fixed
+#'   layout.
+#'
+#' @seealso \code{\link{fluidPage}}
+#'
+#' @examples
+#' shinyUI(fluidPage(
+#'   verticalLayout(
+#'     a(href="http://example.com/link1", "Link One"),
+#'     a(href="http://example.com/link2", "Link Two"),
+#'     a(href="http://example.com/link3", "Link Three")
+#'   )
+#' ))
+#' @export
+verticalLayout <- function(..., fluid = TRUE) {
+  lapply(list(...), function(row) {
+    col <- column(12, row)
+    if (fluid)
+      fluidRow(col)
+    else
+      fixedRow(col)
+  })
+}
+
+
+

R/cache.R

@@ -1,5 +1,5 @@
-# A context object for tracking a cache that needs to be dirtied when a set of 
-# files changes on disk. Each time the cache is dirtied, the set of files is 
+# A context object for tracking a cache that needs to be dirtied when a set of
+# 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(
@@ -17,7 +17,7 @@ CacheContext <- setRefClass(
     addDependencyFile = function(file) {
       if (.dirty)
         return()
-      
+
       file <- normalizePath(file)
 
       mtime <- file.info(file)$mtime
@@ -37,14 +37,14 @@ CacheContext <- setRefClass(
     isDirty = function() {
       if (.dirty)
         return(TRUE)
-      
+
       for (test in .tests) {
         if (test()) {
           forceDirty()
           return(TRUE)
         }
       }
-      
+
       return(FALSE)
     },
     reset = function() {
@@ -55,7 +55,7 @@ CacheContext <- setRefClass(
       oldCC <- .currentCacheContext$cc
       .currentCacheContext$cc <- .self
       on.exit(.currentCacheContext$cc <- oldCC)
-      
+
       return(func())
     }
   )
@@ -63,16 +63,16 @@ CacheContext <- setRefClass(
 
 .currentCacheContext <- new.env()
 
-# Indicates to Shiny that the given file path is part of the dependency graph 
+# Indicates to Shiny that the given file path is part of the dependency graph
 # for whatever is currently executing (so far, only ui.R). By default, ui.R only
 # gets re-executed when it is detected to have changed; this function allows the
 # caller to indicate that it should also re-execute if the given file changes.
-# 
+#
 # If NULL or NA is given as the argument, then ui.R will re-execute next time.
 dependsOnFile <- function(filepath) {
   if (is.null(.currentCacheContext$cc))
-    stop("addFileDependency was called at an unexpected time (no cache context found)")
-  
+    return()
+
   if (is.null(filepath) || is.na(filepath))
     .currentCacheContext$cc$forceDirty()
   else

R/fileupload.R

@@ -1,20 +1,20 @@
 # For HTML5-capable browsers, file uploads happen through a series of requests.
-# 
+#
 # 1. Client tells server that one or more files are about to be uploaded; the
 #    server responds with a "job ID" that the client should use for the rest of
 #    the upload.
-#    
+#
 # 2. For each file (sequentially):
 #    a. Client tells server the name, size, and type of the file.
 #    b. Client sends server a small-ish blob of data.
 #    c. Repeat 2b until the entire file has been uploaded.
 #    d. Client tells server that the current file is done.
-#    
+#
 # 3. Repeat 2 until all files have been uploaded.
-# 
+#
 # 4. Client tells server that all files have been uploaded, along with the
 #    input ID that this data should be associated with.
-# 
+#
 # Unfortunately this approach will not work for browsers that don't support
 # HTML5 File API, but the fallback approach we would like to use (multipart
 # form upload, i.e. traditional HTTP POST-based file upload) doesn't work with
@@ -28,26 +28,38 @@ FileUploadOperation <- setRefClass(
     .files = 'data.frame',
     .dir = 'character',
     .currentFileInfo = 'list',
-    .currentFileData = 'ANY'
+    .currentFileData = 'ANY',
+    .pendingFileInfos = 'list'
   ),
   methods = list(
-    initialize = function(parent, id, dir) {
+    initialize = function(parent, id, dir, fileInfos) {
       .parent <<- parent
       .id <<- id
+      .files <<- data.frame(name=character(),
+                            size=numeric(),
+                            type=character(),
+                            datapath=character(),
+                            stringsAsFactors=FALSE)
       .dir <<- dir
+      .pendingFileInfos <<- fileInfos
     },
-    fileBegin = function(file) {
-      .currentFileInfo <<- file
+    fileBegin = function() {
+      if (length(.pendingFileInfos) < 1)
+        stop("fileBegin called too many times")
 
-      filename <- file.path(.dir, as.character(length(.files)))
+      file <- .pendingFileInfos[[1]]
+      .currentFileInfo <<- file
+      .pendingFileInfos <<- tail(.pendingFileInfos, -1)
+
+      filename <- file.path(.dir, as.character(length(.files$name)))
       row <- data.frame(name=file$name, size=file$size, type=file$type,
                         datapath=filename, stringsAsFactors=FALSE)
-      
-      if (length(.files) == 0)
+
+      if (length(.files$name) == 0)
         .files <<- row
       else
         .files <<- rbind(.files, row)
-      
+
       .currentFileData <<- file(filename, open='wb')
     },
     fileChunk = function(rawdata) {
@@ -57,12 +69,15 @@ FileUploadOperation <- setRefClass(
       close(.currentFileData)
     },
     finish = function() {
+      if (length(.pendingFileInfos) > 0)
+        stop("File upload job was stopped prematurely")
       .parent$onJobFinished(.id)
       return(.files)
     }
   )
 )
 
+#' @include map.R
 FileUploadContext <- setRefClass(
   'FileUploadContext',
   fields = list(
@@ -73,14 +88,14 @@ FileUploadContext <- setRefClass(
     initialize = function(dir=tempdir()) {
       .basedir <<- dir
     },
-    createUploadOperation = function() {
+    createUploadOperation = function(fileInfos) {
       while (TRUE) {
         id <- paste(as.raw(runif(12, min=0, max=0xFF)), collapse='')
         dir <- file.path(.basedir, id)
         if (!dir.create(dir))
           next
-        
-        op <- FileUploadOperation$new(.self, id, dir)
+
+        op <- FileUploadOperation$new(.self, id, dir, fileInfos)
         .operations$set(id, op)
         return(id)
       }

R/graph.R

@@ -0,0 +1,103 @@
+writeReactLog <- function(file=stdout()) {
+  cat(RJSONIO::toJSON(.graphEnv$log, pretty=TRUE), file=file)
+}
+
+#' Reactive Log Visualizer
+#'
+#' Provides an interactive browser-based tool for visualizing reactive
+#' dependencies and execution in your application.
+#'
+#' To use the reactive log visualizer, start with a fresh R session and
+#' run the command \code{options(shiny.reactlog=TRUE)}; then launch your
+#' application in the usual way (e.g. using \code{\link{runApp}}). At
+#' any time you can hit Ctrl+F3 (or for Mac users, Command+F3) in your
+#' web browser to launch the reactive log visualization.
+#'
+#' The reactive log visualization only includes reactive activity up
+#' until the time the report was loaded. If you want to see more recent
+#' activity, refresh the browser.
+#'
+#' Note that Shiny does not distinguish between reactive dependencies
+#' that "belong" to one Shiny user session versus another, so the
+#' visualization will include all reactive activity that has taken place
+#' in the process, not just for a particular application or session.
+#'
+#' As an alternative to pressing Ctrl/Command+F3--for example, if you
+#' are using reactives outside of the context of a Shiny
+#' application--you can run the \code{showReactLog} function, which will
+#' generate the reactive log visualization as a static HTML file and
+#' launch it in your default browser. In this case, refreshing your
+#' browser will not load new activity into the report; you will need to
+#' call \code{showReactLog()} explicitly.
+#'
+#' For security and performance reasons, do not enable
+#' \code{shiny.reactlog} in production environments. When the option is
+#' enabled, it's possible for any user of your app to see at least some
+#' of the source code of your reactive expressions and observers.
+#'
+#' @export
+showReactLog <- function() {
+  browseURL(renderReactLog())
+}
+
+renderReactLog <- function() {
+  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)
+  cat('\n', file=tc)
+  flush(tc)
+  html <- sub('__DATA__', paste(textConnectionValue(tc), collapse='\r\n'), html, fixed=TRUE)
+  file <- tempfile(fileext = '.html')
+  writeLines(html, file)
+  return(file)
+}
+
+.graphAppend <- function(logEntry) {
+  if (isTRUE(getOption('shiny.reactlog', FALSE)))
+    .graphEnv$log <- c(.graphEnv$log, list(logEntry))
+  session <- .getShowcaseSessionContext()
+  if (!is.null(session)) {
+    session$.sendCustomMessage("reactlog", logEntry)
+  }
+}
+
+.graphDependsOn <- function(id, label) {
+  .graphAppend(list(action='dep', id=id, dependsOn=label))
+}
+
+.graphDependsOnId <- function(id, dependee) {
+  .graphAppend(list(action='depId', id=id, dependsOn=dependee))
+}
+
+.graphCreateContext <- function(id, label, type, prevId) {
+  .graphAppend(list(
+    action='ctx', id=id, label=paste(label, collapse='\n'),
+    srcref=attr(label, "srcref"), srcfile=attr(label, "srcfile"),
+    type=type, prevId=prevId
+  ))
+}
+
+.graphEnterContext <- function(id) {
+  .graphAppend(list(action='enter', id=id))
+}
+
+.graphExitContext <- function(id) {
+  .graphAppend(list(action='exit', id=id))
+}
+
+.graphValueChange <- function(label, value) {
+  .graphAppend(list(
+    action = 'valueChange',
+    id = label,
+    value = paste(capture.output(str(value)), collapse='\n')
+  ))
+}
+
+.graphInvalidate <- function(id) {
+  .graphAppend(list(action='invalidate', id=id))
+}
+
+.graphEnv <- new.env()
+.graphEnv$log <- list()

R/hooks.R

@@ -0,0 +1,24 @@
+
+
+# Call an application hook. Application hooks are provided so that front ends
+# can know when a Shiny application is running:
+#
+# shiny.onAppStart -- called when an application begins running
+# shiny.onAppStop -- called when an appliation stops
+#
+# Both hooks are passed the url where the application is accessible (appUrl).
+# Note that the appUrl can be NULL if the application was run on a UNIX domain
+# socket rather than a TCP/IP port/
+callAppHook <- function(name, appUrl) {
+  for (hook in getHooksList(paste0("shiny.", name)))
+    hook(appUrl)
+}
+
+# The value for getHook can be a single function or a list of functions,
+# This function ensures that the result can always be processed as a list
+getHooksList <- function(name) {
+  hooks <- getHook(name)
+  if (!is.list(hooks))
+    hooks <- list(hooks)
+  hooks
+}

R/imageutils.R

@@ -0,0 +1,49 @@
+#' Run a plotting function and save the output as a PNG
+#'
+#' This function returns the name of the PNG file that it generates. In
+#' essence, it calls \code{png()}, then \code{func()}, then \code{dev.off()}.
+#' So \code{func} must be a function that will generate a plot when used this
+#' way.
+#'
+#' For output, it will try to use the following devices, in this order:
+#' quartz (via \code{\link[grDevices]{png}}), then \code{\link[Cairo]{CairoPNG}},
+#' and finally \code{\link[grDevices]{png}}. This is in order of quality of
+#' output. Notably, plain \code{png} output on Linux and Windows may not
+#' antialias some point shapes, resulting in poor quality output.
+#'
+#' In some cases, \code{Cairo()} provides output that looks worse than
+#' \code{png()}. To disable Cairo output for an app, use
+#' \code{options(shiny.usecairo=FALSE)}.
+#'
+#' @param func A function that generates a plot.
+#' @param filename The name of the output file. Defaults to a temp file with
+#'   extension \code{.png}.
+#' @param width Width in pixels.
+#' @param height Height in pixels.
+#' @param res Resolution 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.
+#'
+#' @export
+plotPNG <- function(func, filename=tempfile(fileext='.png'),
+                    width=400, height=400, res=72, ...) {
+  # If quartz is available, use png() (which will default to quartz).
+  # 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) &&
+             nchar(system.file(package = "Cairo"))) {
+    pngfun <- Cairo::CairoPNG
+  } else {
+    pngfun <- png
+  }
+
+  pngfun(filename=filename, width=width, height=height, res=res, ...)
+  dv <- dev.cur()
+  tryCatch(shinyCallingHandlers(func()), finally = dev.off(dv))
+
+  filename
+}

R/jqueryui.R

@@ -0,0 +1,102 @@
+#' Panel with absolute positioning
+#'
+#' Creates a panel whose contents are absolutely positioned.
+#'
+#' The \code{absolutePanel} function creates a \code{<div>} tag whose CSS
+#' position is set to \code{absolute} (or fixed if \code{fixed = TRUE}). The way
+#' absolute positioning works in HTML is that absolute coordinates are specified
+#' relative to its nearest parent element whose position is not set to
+#' \code{static} (which is the default), and if no such parent is found, then
+#' relative to the page borders. If you're not sure what that means, just keep
+#' in mind that you may get strange results if you use \code{absolutePanel} from
+#' inside of certain types of panels.
+#'
+#' The \code{fixedPanel} function is the same as \code{absolutePanel} with
+#' \code{fixed = TRUE}.
+#'
+#' The position (\code{top}, \code{left}, \code{right}, \code{bottom}) and size
+#' (\code{width}, \code{height}) parameters are all optional, but you should
+#' specify exactly two of \code{top}, \code{bottom}, and \code{height} and
+#' exactly two of \code{left}, \code{right}, and \code{width} for predictable
+#' results.
+#'
+#' Like most other distance parameters in Shiny, the position and size
+#' parameters take a number (interpreted as pixels) or a valid CSS size string,
+#' such as \code{"100px"} (100 pixels) or \code{"25\%"}.
+#'
+#' For arcane HTML reasons, to have the panel fill the page or parent you should
+#' specify \code{0} for \code{top}, \code{left}, \code{right}, and \code{bottom}
+#' rather than the more obvious \code{width = "100\%"} and \code{height =
+#' "100\%"}.
+#'
+#' @param ... Attributes (named arguments) or children (unnamed arguments) that
+#'   should be included in the panel.
+#'
+#' @param top Distance between the top of the panel, and the top of the page or
+#'   parent container.
+#' @param left Distance between the left side of the panel, and the left of the
+#'   page or parent container.
+#' @param right Distance between the right side of the panel, and the right of
+#'   the page or parent container.
+#' @param bottom Distance between the bottom of the panel, and the bottom of the
+#'   page or parent container.
+#' @param width Width of the panel.
+#' @param height Height of the panel.
+#' @param draggable If \code{TRUE}, allows the user to move the panel by
+#'   clicking and dragging.
+#' @param fixed Positions the panel relative to the browser window and prevents
+#'   it from being scrolled with the rest of the page.
+#' @param cursor The type of cursor that should appear when the user mouses over
+#'   the panel. Use \code{"move"} for a north-east-south-west icon,
+#'   \code{"default"} for the usual cursor arrow, or \code{"inherit"} for the
+#'   usual cursor behavior (including changing to an I-beam when the cursor is
+#'   over text). The default is \code{"auto"}, which is equivalent to
+#'   \code{ifelse(draggable, "move", "inherit")}.
+#' @return An HTML element or list of elements.
+#'
+#' @export
+absolutePanel <- function(...,
+                          top = NULL, left = NULL, right = NULL, bottom = NULL,
+                          width = NULL, height = NULL,
+                          draggable = FALSE, fixed = FALSE,
+                          cursor = c('auto', 'move', 'default', 'inherit')) {
+  cssProps <- list(
+    top = top,
+    left = left,
+    right = right,
+    bottom = bottom,
+    width = width,
+    height = height
+  )
+  cssProps <- cssProps[!sapply(cssProps, is.null)]
+  cssProps <- sapply(cssProps, validateCssUnit)
+  cssProps[['position']] <- ifelse(fixed, 'fixed', 'absolute')
+  cssProps[['cursor']] <- match.arg(cursor)
+  if (identical(cssProps[['cursor']], 'auto'))
+    cssProps[['cursor']] <- ifelse(draggable, 'move', 'inherit')
+
+  style <- paste(paste(names(cssProps), cssProps, sep = ':', collapse = ';'), ';', sep='')
+  divTag <- tags$div(style=style, ...)
+  if (isTRUE(draggable)) {
+    divTag <- tagAppendAttributes(divTag, class='draggable')
+    return(tagList(
+      singleton(tags$head(tags$script(src='shared/jqueryui/1.10.3/jquery-ui.min.js'))),
+      divTag,
+      tags$script('$(".draggable").draggable();')
+    ))
+  } else {
+    return(divTag)
+  }
+}
+
+#' @rdname absolutePanel
+#' @export
+fixedPanel <- function(...,
+                       top = NULL, left = NULL, right = NULL, bottom = NULL,
+                       width = NULL, height = NULL,
+                       draggable = FALSE,
+                       cursor = c('move', 'default', 'inherit')) {
+  absolutePanel(..., top=top, left=left, right=right, bottom=bottom,
+                width=width, height=height, draggable=draggable, cursor=cursor,
+                fixed=TRUE)
+}

R/priorityqueue.R

@@ -0,0 +1,110 @@
+# "...like a regular queue or stack data structure, but where additionally each
+# element has a "priority" associated with it. In a priority queue, an element
+# with high priority is served before an element with low priority. If two
+# 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',
+  fields = list(
+    # Keys are priorities, values are subqueues (implemented as list)
+    .itemsByPriority = 'Map',
+    # Sorted vector (largest first)
+    .priorities = 'numeric'
+  ),
+  methods = list(
+    # Enqueue an item, with the given priority level (must be integer). Higher
+    # priority numbers are dequeued earlier than lower.
+    enqueue = function(item, priority) {
+      priority <- normalizePriority(priority)
+
+      if (!(priority %in% .priorities)) {
+        .priorities <<- c(.priorities, priority)
+        .priorities <<- sort(.priorities, decreasing=TRUE)
+        .itemsByPriority$set(.key(priority), list(item))
+      } else {
+        .itemsByPriority$set(
+          .key(priority),
+          c(.itemsByPriority$get(.key(priority)), item)
+        )
+      }
+      return(invisible())
+    },
+    # Retrieve a single item by 1) priority number (highest first) and then 2)
+    # insertion order (first in, first out). If there are no items to be
+    # dequeued, then NULL is returned. If it is necessary to distinguish between
+    # a NULL value and the empty case, call isEmpty() before dequeue().
+    dequeue = function() {
+      if (length(.priorities) == 0)
+        return(NULL)
+
+      maxPriority <- .priorities[[1]]
+      items <- .itemsByPriority$get(.key(maxPriority))
+      firstItem <- items[[1]]
+      if (length(items) == 1) {
+        # This is the last item at this priority. Remove both the list and the
+        # priority level.
+        .itemsByPriority$remove(.key(maxPriority))
+        .priorities <<- .priorities[-1]
+      } else {
+        # There are still items at this priority. Remove the current item from
+        # the list, and save it.
+        items <- items[-1]
+        .itemsByPriority$set(.key(maxPriority), items)
+      }
+      return(firstItem)
+    },
+    # Returns TRUE if no items are in the queue, otherwise FALSE.
+    isEmpty = function() {
+      length(.priorities) == 0
+    },
+    # Translates a priority integer to a character that is suitable for using as
+    # a key.
+    .key = function(priority) {
+      sprintf('%a', priority)
+    }
+  )
+)
+
+normalizePriority <- function(priority) {
+
+  if (is.null(priority))
+    priority <- 0
+
+  # Cast integers to numeric to prevent any inconsistencies
+  if (is.integer(priority))
+    priority <- as.numeric(priority)
+
+  if (!is.numeric(priority))
+    stop('priority must be an integer or numeric')
+
+  # Check length
+  if (length(priority) == 0) {
+    warning('Zero-length priority vector was passed; using 0')
+    priority <- 0
+  } else if (length(priority) > 1) {
+    warning('Priority has length > 1 and only the first element will be used')
+    priority <- priority[1]
+  }
+
+  # NA == 0
+  if (is.na(priority))
+    priority <- 0
+
+  return(priority)
+}
+
+# pq <- PriorityQueue$new()
+# pq$enqueue('a', 1)
+# pq$enqueue('b', 1L)
+# pq$enqueue('c', 1)
+# pq$enqueue('A', 2)
+# pq$enqueue('B', 2L)
+# pq$enqueue('C', 2)
+# pq$enqueue('d', 1)
+# pq$enqueue('e', 1L)
+# pq$enqueue('f', 1)
+# pq$enqueue('D', 2)
+# pq$enqueue('E', 2L)
+# pq$enqueue('F', 2)
+# # Expect ABCDEFabcdef

R/react.R

@@ -8,16 +8,19 @@ Context <- setRefClass(
     .flushCallbacks = 'list'
   ),
   methods = list(
-    initialize = function(label='') {
+    initialize = function(label='', type='other', prevId='') {
       id <<- .getReactiveEnvironment()$nextId()
       .invalidated <<- FALSE
       .invalidateCallbacks <<- list()
       .flushCallbacks <<- list()
       .label <<- label
+      .graphCreateContext(id, label, type, prevId)
     },
     run = function(func) {
       "Run the provided function under this context."
       env <- .getReactiveEnvironment()
+      .graphEnterContext(id)
+      on.exit(.graphExitContext(id))
       env$runWith(.self, func)
     },
     invalidate = function() {
@@ -27,6 +30,7 @@ Context <- setRefClass(
         return()
       .invalidated <<- TRUE
 
+      .graphInvalidate(id)
       lapply(.invalidateCallbacks, function(func) {
         func()
       })
@@ -42,10 +46,10 @@ Context <- setRefClass(
         .invalidateCallbacks <<- c(.invalidateCallbacks, func)
       NULL
     },
-    addPendingFlush = function() {
+    addPendingFlush = function(priority) {
       "Tell the reactive environment that this context should be flushed the
         next time flushReact() called."
-      .getReactiveEnvironment()$addPendingFlush(.self)
+      .getReactiveEnvironment()$addPendingFlush(.self, priority)
     },
     onFlush = function(func) {
       "Register a function to be called when this context is flushed."
@@ -71,14 +75,14 @@ ReactiveEnvironment <- setRefClass(
   fields = list(
     .currentContext = 'ANY',
     .nextId = 'integer',
-    .pendingFlush = 'list',
+    .pendingFlush = 'PriorityQueue',
     .inFlush = 'logical'
   ),
   methods = list(
     initialize = function() {
       .currentContext <<- NULL
       .nextId <<- 0L
-      .pendingFlush <<- list()
+      .pendingFlush <<- PriorityQueue$new()
       .inFlush <<- FALSE
     },
     nextId = function() {
@@ -86,20 +90,25 @@ ReactiveEnvironment <- setRefClass(
       return(as.character(.nextId))
     },
     currentContext = function() {
-      if (is.null(.currentContext))
-        stop('Operation not allowed without an active reactive context. ',
-             '(You tried to do something that can only be done from inside a ',
-             'reactive function.)')
+      if (is.null(.currentContext)) {
+        if (isTRUE(getOption('shiny.suppressMissingContextError', FALSE))) {
+          return(dummyContext)
+        } else {
+          stop('Operation not allowed without an active reactive context. ',
+               '(You tried to do something that can only be done from inside a ',
+               'reactive expression or observer.)')
+        }
+      }
       return(.currentContext)
     },
     runWith = function(ctx, func) {
       old.ctx <- .currentContext
       .currentContext <<- ctx
       on.exit(.currentContext <<- old.ctx)
-      func()
+      shinyCallingHandlers(func())
     },
-    addPendingFlush = function(ctx) {
-      .pendingFlush <<- c(ctx, .pendingFlush)
+    addPendingFlush = function(ctx, priority) {
+      .pendingFlush$enqueue(ctx, priority)
     },
     flush = function() {
       # If already in a flush, don't start another one
@@ -107,9 +116,8 @@ ReactiveEnvironment <- setRefClass(
       .inFlush <<- TRUE
       on.exit(.inFlush <<- FALSE)
 
-      while (length(.pendingFlush) > 0) {
-        ctx <- .pendingFlush[[1]]
-        .pendingFlush <<- .pendingFlush[-1]
+      while (!.pendingFlush$isEmpty()) {
+        ctx <- .pendingFlush$dequeue()
         ctx$executeFlushCallbacks()
       }
     }
@@ -131,3 +139,5 @@ flushReact <- function() {
 getCurrentContext <- function() {
   .getReactiveEnvironment()$currentContext()
 }
+
+delayedAssign("dummyContext", Context$new('[none]', type='isolate'))

R/reactives.R

@@ -4,13 +4,18 @@ Dependents <- setRefClass(
     .dependents = 'Map'
   ),
   methods = list(
-    register = function() {
+    register = function(depId=NULL, depLabel=NULL) {
       ctx <- .getReactiveEnvironment()$currentContext()
       if (!.dependents$containsKey(ctx$id)) {
         .dependents$set(ctx$id, ctx)
         ctx$onInvalidate(function() {
           .dependents$remove(ctx$id)
         })
+
+        if (!is.null(depId) && nchar(depId) > 0)
+          .graphDependsOnId(ctx$id, depId)
+        if (!is.null(depLabel))
+          .graphDependsOn(ctx$id, depLabel)
       }
     },
     invalidate = function() {
@@ -31,6 +36,8 @@ Dependents <- setRefClass(
 ReactiveValues <- setRefClass(
   'ReactiveValues',
   fields = list(
+    # For debug purposes
+    .label = 'character',
     .values = 'environment',
     .dependents = 'environment',
     # Dependents for the list of all names, including hidden
@@ -42,6 +49,8 @@ ReactiveValues <- setRefClass(
   ),
   methods = list(
     initialize = function() {
+      .label <<- paste('reactiveValues', runif(1, min=1000, max=9999),
+                       sep="")
       .values <<- new.env(parent=emptyenv())
       .dependents <<- new.env(parent=emptyenv())
     },
@@ -49,12 +58,13 @@ ReactiveValues <- setRefClass(
       ctx <- .getReactiveEnvironment()$currentContext()
       dep.key <- paste(key, ':', ctx$id, sep='')
       if (!exists(dep.key, where=.dependents, inherits=FALSE)) {
+        .graphDependsOn(ctx$id, sprintf('%s$%s', .label, key))
         assign(dep.key, ctx, pos=.dependents, inherits=FALSE)
         ctx$onInvalidate(function() {
           rm(list=dep.key, pos=.dependents, inherits=FALSE)
         })
       }
-      
+
       if (!exists(key, where=.values, inherits=FALSE))
         NULL
       else
@@ -76,8 +86,13 @@ ReactiveValues <- setRefClass(
         .allValuesDeps$invalidate()
       else
         .valuesDeps$invalidate()
-      
+
       assign(key, value, pos=.values, inherits=FALSE)
+
+      .graphValueChange(sprintf('names(%s)', .label), ls(.values, all.names=TRUE))
+      .graphValueChange(sprintf('%s (all)', .label), as.list(.values))
+      .graphValueChange(sprintf('%s$%s', .label, key), value)
+
       dep.keys <- objects(
         pos=.dependents,
         pattern=paste('^\\Q', key, ':', '\\E', '\\d+$', sep=''),
@@ -99,16 +114,23 @@ ReactiveValues <- setRefClass(
              })
     },
     names = function() {
+      .graphDependsOn(.getReactiveEnvironment()$currentContext()$id,
+                      sprintf('names(%s)', .label))
       .namesDeps$register()
       return(ls(.values, all.names=TRUE))
     },
     toList = function(all.names=FALSE) {
+      .graphDependsOn(.getReactiveEnvironment()$currentContext()$id,
+                      sprintf('%s (all)', .label))
       if (all.names)
         .allValuesDeps$register()
 
       .valuesDeps$register()
 
       return(as.list(.values, all.names=all.names))
+    },
+    .setLabel = function(label) {
+      .label <<- label
     }
   )
 )
@@ -151,7 +173,7 @@ ReactiveValues <- setRefClass(
 #' @param ... Objects that will be added to the reactivevalues object. All of
 #'   these objects must be named.
 #'
-#' @seealso \code{\link{isolate}}.
+#' @seealso \code{\link{isolate}} and \code{\link{is.reactivevalues}}.
 #'
 #' @export
 reactiveValues <- function(...) {
@@ -166,6 +188,9 @@ reactiveValues <- function(...) {
   values
 }
 
+# Register the S3 class so that it can be used for a field in a Reference Class
+setOldClass("reactivevalues")
+
 # Create a reactivevalues object
 #
 # @param values A ReactiveValues object
@@ -174,6 +199,15 @@ reactiveValues <- function(...) {
   structure(list(impl=values), class='reactivevalues', readonly=readonly)
 }
 
+#' Checks whether an object is a reactivevalues object
+#'
+#' Checks whether its argument is a reactivevalues object.
+#'
+#' @param x The object to test.
+#' @seealso \code{\link{reactiveValues}}.
+#' @export
+is.reactivevalues <- function(x) inherits(x, 'reactivevalues')
+
 #' @S3method $ reactivevalues
 `$.reactivevalues` <- function(x, name) {
   .subset2(x, 'impl')$get(name)
@@ -228,6 +262,11 @@ as.list.reactivevalues <- function(x, all.names=FALSE, ...) {
   reactiveValuesToList(x, all.names)
 }
 
+# For debug purposes
+.setLabel <- function(x, label) {
+  .subset2(x, 'impl')$.setLabel(label)
+}
+
 #' Convert a reactivevalues object to a list
 #'
 #' This function does something similar to what you might \code{\link{as.list}}
@@ -266,7 +305,8 @@ Observable <- setRefClass(
     .running = 'logical',
     .value = 'ANY',
     .visible = 'logical',
-    .execCount = 'integer'
+    .execCount = 'integer',
+    .mostRecentCtxId = 'character'
   ),
   methods = list(
     initialize = function(func, label=deparse(substitute(func))) {
@@ -279,6 +319,7 @@ Observable <- setRefClass(
       .running <<- FALSE
       .label <<- label
       .execCount <<- 0L
+      .mostRecentCtxId <<- ""
     },
     getValue = function() {
       .dependents$register()
@@ -286,7 +327,9 @@ Observable <- setRefClass(
       if (.invalidated || .running) {
         .self$.updateValue()
       }
-      
+
+      .graphDependsOnId(getCurrentContext()$id, .mostRecentCtxId)
+
       if (identical(class(.value), 'try-error'))
         stop(attr(.value, 'condition'))
 
@@ -296,7 +339,8 @@ Observable <- setRefClass(
         invisible(.value)
     },
     .updateValue = function() {
-      ctx <- Context$new(.label)
+      ctx <- Context$new(.label, type='observable', prevId=.mostRecentCtxId)
+      .mostRecentCtxId <<- ctx$id
       ctx$onInvalidate(function() {
         .invalidated <<- TRUE
         .dependents$invalidate()
@@ -310,7 +354,7 @@ Observable <- setRefClass(
       on.exit(.running <<- wasRunning)
 
       ctx$run(function() {
-        result <- withVisible(try(.func(), silent=FALSE))
+        result <- withVisible(try(shinyCallingHandlers(.func()), silent=FALSE))
         .visible <<- result$visible
         .value <<- result$value
       })
@@ -334,7 +378,8 @@ Observable <- setRefClass(
 #' See the \href{http://rstudio.github.com/shiny/tutorial/}{Shiny tutorial} for
 #' more information about reactive expressions.
 #'
-#' @param x An expression (quoted or unquoted).
+#' @param x For \code{reactive}, an expression (quoted or unquoted). For
+#'   \code{is.reactive}, an object to test.
 #' @param env The parent environment for the reactive expression. By default, this
 #'   is the calling environment, the same as when defining an ordinary
 #'   non-reactive expression.
@@ -342,6 +387,7 @@ Observable <- setRefClass(
 #'   This is useful when you want to use an expression that is stored in a
 #'   variable; to do so, it must be quoted with `quote()`.
 #' @param label A label for the reactive expression, useful for debugging.
+#' @return a function, wrapped in a S3 class "reactive"
 #'
 #' @examples
 #' values <- reactiveValues(A=1)
@@ -365,12 +411,27 @@ Observable <- setRefClass(
 #' @export
 reactive <- function(x, env = parent.frame(), quoted = FALSE, label = NULL) {
   fun <- exprToFunction(x, env, quoted)
+  # Attach a label and a reference to the original user source for debugging
   if (is.null(label))
-    label <- deparse(body(fun))
-
-  Observable$new(fun, label)$getValue
+    label <- sprintf('reactive(%s)', paste(deparse(body(fun)), collapse='\n'))
+  srcref <- attr(substitute(x), "srcref")
+  if (length(srcref) >= 2) attr(label, "srcref") <- srcref[[2]]
+  attr(label, "srcfile") <- srcFileOfRef(srcref[[1]])
+  o <- Observable$new(fun, label)
+  registerDebugHook(".func", o, "Reactive")
+  structure(o$getValue@.Data, observable = o, class = "reactive")
 }
 
+#' @S3method print reactive
+print.reactive <- function(x, ...) {
+  label <- attr(x, "observable")$.label
+  cat(label, "\n")
+}
+
+#' @export
+#' @rdname reactive
+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))
@@ -388,28 +449,33 @@ Observer <- setRefClass(
   fields = list(
     .func = 'function',
     .label = 'character',
+    .priority = 'numeric',
     .invalidateCallbacks = 'list',
     .execCount = 'integer',
     .onResume = 'function',
-    .suspended = 'logical'
+    .suspended = 'logical',
+    .prevId = 'character'
   ),
   methods = list(
-    initialize = function(func, label, suspended = FALSE) {
+    initialize = function(func, label, suspended = FALSE, priority = 0) {
       if (length(formals(func)) > 0)
         stop("Can't make an observer from a function that takes parameters; ",
              "only functions without parameters can be reactive.")
 
       .func <<- func
       .label <<- label
+      .priority <<- normalizePriority(priority)
       .execCount <<- 0L
       .suspended <<- suspended
       .onResume <<- function() NULL
+      .prevId <<- ''
 
       # Defer the first running of this until flushReact is called
       .createContext()$invalidate()
     },
     .createContext = function() {
-      ctx <- Context$new(.label)
+      ctx <- Context$new(.label, type='observer', prevId=.prevId)
+      .prevId <<- ctx$id
 
       ctx$onInvalidate(function() {
         lapply(.invalidateCallbacks, function(func) {
@@ -418,19 +484,19 @@ Observer <- setRefClass(
         })
 
         continue <- function() {
-          ctx$addPendingFlush()
+          ctx$addPendingFlush(.priority)
         }
-        
+
         if (.suspended == FALSE)
           continue()
         else
           .onResume <<- continue
       })
-      
+
       ctx$onFlush(function() {
         run()
       })
-      
+
       return(ctx)
     },
     run = function() {
@@ -438,15 +504,24 @@ Observer <- setRefClass(
       .execCount <<- .execCount + 1L
       ctx$run(.func)
     },
-    onInvalidate = function(func) {
-      "Register a function to run when this observer is invalidated"
-      .invalidateCallbacks <<- c(.invalidateCallbacks, func)
+    onInvalidate = function(callback) {
+      "Register a callback function to run when this observer is invalidated.
+      No arguments will be provided to the callback function when it is
+      invoked."
+      .invalidateCallbacks <<- c(.invalidateCallbacks, callback)
+    },
+    setPriority = function(priority = 0) {
+      "Change this observer's priority. Note that if the observer is currently
+      invalidated, then the change in priority will not take effect until the
+      next invalidation--unless the observer is also currently suspended, in
+      which case the priority change will be effective upon resume."
+      .priority <<- normalizePriority(priority)
     },
     suspend = function() {
       "Causes this observer to stop scheduling flushes (re-executions) in
       response to invalidations. If the observer was invalidated prior to this
       call but it has not re-executed yet (because it waits until onFlush is
-      called) then that re-execution will still occur, becasue the flush is
+      called) then that re-execution will still occur, because the flush is
       already scheduled."
       .suspended <<- TRUE
     },
@@ -465,21 +540,23 @@ Observer <- setRefClass(
 )
 
 #' Create a reactive observer
-#' 
-#' Creates an observer from the given expression An observer is like a reactive
+#'
+#' Creates an observer from the given expression.
+#'
+#' An observer is like a reactive
 #' expression in that it can read reactive values and call reactive expressions, and
-#' will automatically re-execute when those dependencies change. But unlike 
-#' reactive expression, it doesn't yield a result and can't be used as an input 
-#' to other reactive expressions. Thus, observers are only useful for their side 
+#' will automatically re-execute when those dependencies change. But unlike
+#' reactive expressions, it doesn't yield a result and can't be used as an input
+#' to other reactive expressions. Thus, observers are only useful for their side
 #' effects (for example, performing I/O).
-#' 
+#'
 #' Another contrast between reactive expressions and observers is their execution
 #' strategy. Reactive expressions use lazy evaluation; that is, when their
 #' dependencies change, they don't re-execute right away but rather wait until
 #' they are called by someone else. Indeed, if they are not called then they
 #' will never re-execute. In contrast, observers use eager evaluation; as soon
 #' as their dependencies change, they schedule themselves to re-execute.
-#' 
+#'
 #' @param x An expression (quoted or unquoted). Any return value will be ignored.
 #' @param env The parent environment for the reactive expression. By default, this
 #'   is the calling environment, the same as when defining an ordinary
@@ -490,6 +567,36 @@ Observer <- setRefClass(
 #' @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.
+#' @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.
+#' @return An observer reference class object. This object has the following
+#'   methods:
+#'   \describe{
+#'     \item{\code{suspend()}}{
+#'       Causes this observer to stop scheduling flushes (re-executions) in
+#'       response to invalidations. If the observer was invalidated prior to
+#'       this call but it has not re-executed yet then that re-execution will
+#'       still occur, because the flush is already scheduled.
+#'     }
+#'     \item{\code{resume()}}{
+#'       Causes this observer to start re-executing in response to
+#'       invalidations. If the observer was invalidated while suspended, then it
+#'       will schedule itself for re-execution.
+#'     }
+#'     \item{\code{setPriority(priority = 0)}}{
+#'       Change this observer's priority. Note that if the observer is currently
+#'       invalidated, then the change in priority will not take effect until the
+#'       next invalidation--unless the observer is also currently suspended, in
+#'       which case the priority change will be effective upon resume.
+#'     }
+#'     \item{\code{onInvalidate(callback)}}{
+#'       Register a callback function to run when this observer is invalidated.
+#'       No arguments will be provided to the callback function when it is
+#'       invoked.
+#'     }
+#'   }
 #'
 #' @examples
 #' values <- reactiveValues(A=1)
@@ -511,40 +618,156 @@ Observer <- setRefClass(
 #'
 #' @export
 observe <- function(x, env=parent.frame(), quoted=FALSE, label=NULL,
-                    suspended=FALSE) {
+                    suspended=FALSE, priority=0) {
 
   fun <- exprToFunction(x, env, quoted)
   if (is.null(label))
-    label <- deparse(body(fun))
+    label <- sprintf('observe(%s)', paste(deparse(body(fun)), collapse='\n'))
 
-  invisible(Observer$new(fun, label=label, suspended=suspended))
+  o <- Observer$new(fun, label=label, suspended=suspended, priority=priority)
+  registerDebugHook(".func", o, "Observer")
+  invisible(o)
 }
 
+#' Make a reactive variable
+#'
+#' Turns a normal variable into a reactive variable, that is, one that has
+#' reactive semantics when assigned or read in the usual ways. The variable may
+#' already exist; if so, its value will be used as the initial value of the
+#' reactive variable (or \code{NULL} if the variable did not exist).
+#'
+#' @param symbol A character string indicating the name of the variable that
+#'   should be made reactive
+#' @param env The environment that will contain the reactive variable
+#'
+#' @return None.
+#'
+#' @examples
+#' \dontrun{
+#' a <- 10
+#' makeReactiveBinding("a")
+#' b <- reactive(a * -1)
+#' observe(print(b()))
+#' a <- 20
+#' }
+#' @export
+makeReactiveBinding <- function(symbol, env = parent.frame()) {
+  if (exists(symbol, where = env, inherits = FALSE)) {
+    initialValue <- get(symbol, pos = env, inherits = FALSE)
+    rm(list = symbol, pos = env, inherits = FALSE)
+  }
+  else
+    initialValue <- NULL
+  values <- reactiveValues(value = initialValue)
+  makeActiveBinding(symbol, env=env, fun=function(v) {
+    if (missing(v))
+      values$value
+    else
+      values$value <- v
+  })
+
+  invisible()
+}
+
+# `%<-reactive%` <- function(name, value) {
+#   sym <- deparse(substitute(name))
+#   assign(sym, value, pos = parent.frame())
+#   makeReactiveBinding(sym, env=parent.frame())
+#   invisible(NULL)
+# }
+
+# Causes flushReact to be called every time an expression is
+# entered into the top-level prompt
+setAutoflush <- local({
+  callbackId <- NULL
+
+  function(enable) {
+    if (xor(is.null(callbackId), isTRUE(enable))) {
+      return(invisible())
+    }
+
+    if (isTRUE(enable)) {
+      callbackId <<- addTaskCallback(function(expr, value, ok, visible) {
+        timerCallbacks$executeElapsed()
+        flushReact()
+        return(TRUE)
+      })
+    } else {
+      removeTaskCallback(callbackId)
+      callbackId <<- NULL
+    }
+    invisible()
+  }
+})
+
 # ---------------------------------------------------------------------------
 
 #' Timer
-#' 
-#' Creates a reactive timer with the given interval. A reactive timer is like a 
+#'
+#' Creates a reactive timer with the given interval. A reactive timer is like a
 #' reactive value, except reactive values are triggered when they are set, while
 #' reactive timers are triggered simply by the passage of time.
-#' 
-#' \link[=reactive]{Reactive expressions} and observers that want to be 
-#' invalidated by the timer need to call the timer function that 
-#' \code{reactiveTimer} returns, even if the current time value is not actually 
+#'
+#' \link[=reactive]{Reactive expressions} and observers that want to be
+#' invalidated by the timer need to call the timer function that
+#' \code{reactiveTimer} returns, even if the current time value is not actually
 #' needed.
-#' 
+#'
 #' See \code{\link{invalidateLater}} as a safer and simpler alternative.
-#' 
+#'
 #' @param intervalMs How often to fire, in milliseconds
-#' @return A no-parameter function that can be called from a reactive context, 
-#'   in order to cause that context to be invalidated the next time the timer 
-#'   interval elapses. Calling the returned function also happens to yield the 
+#' @param session A session object. This is needed to cancel any scheduled
+#'   invalidations after a user has ended the session. If \code{NULL}, then
+#'   this invalidation will not be tied to any session, and so it will still
+#'   occur.
+#' @return A no-parameter function that can be called from a reactive context,
+#'   in order to cause that context to be invalidated the next time the timer
+#'   interval elapses. Calling the returned function also happens to yield the
 #'   current time (as in \code{\link{Sys.time}}).
-#' @seealso invalidateLater
+#' @seealso \code{\link{invalidateLater}}
+#'
+#' @examples
+#' \dontrun{
+#' shinyServer(function(input, output, session) {
+#'
+#'   # Anything that calls autoInvalidate will automatically invalidate
+#'   # every 2 seconds.
+#'   autoInvalidate <- reactiveTimer(2000, session)
+#'
+#'   observe({
+#'     # Invalidate and re-execute this reactive expression every time the
+#'     # timer fires.
+#'     autoInvalidate()
+#'
+#'     # Do something each time this is invalidated.
+#'     # The isolate() makes this observer _not_ get invalidated and re-executed
+#'     # when input$n changes.
+#'     print(paste("The value of input$n is", isolate(input$n)))
+#'   })
+#'
+#'   # Generate a new histogram each time the timer fires, but not when
+#'   # input$n changes.
+#'   output$plot <- renderPlot({
+#'     autoInvalidate()
+#'     hist(isolate(input$n))
+#'   })
+#' })
+#' }
+#'
 #' @export
-reactiveTimer <- function(intervalMs=1000) {
+reactiveTimer <- function(intervalMs=1000, session) {
+  if (missing(session)) {
+    warning("reactiveTimer should be passed a session object or NULL")
+    session <- NULL
+  }
+
   dependents <- Map$new()
   timerCallbacks$schedule(intervalMs, function() {
+    # Quit if the session is closed
+    if (!is.null(session) && session$isClosed()) {
+      return(invisible())
+    }
+
     timerCallbacks$schedule(intervalMs, sys.function())
     lapply(
       dependents$values(),
@@ -566,33 +789,243 @@ reactiveTimer <- function(intervalMs=1000) {
 }
 
 #' Scheduled Invalidation
-#' 
-#' Schedules the current reactive context to be invalidated in the given number 
+#'
+#' Schedules the current reactive context to be invalidated in the given number
 #' of milliseconds.
+#'
+#' If this is placed within an observer or reactive expression, that object will
+#' be invalidated (and re-execute) after the interval has passed. The
+#' re-execution will reset the invalidation flag, so in a typical use case, the
+#' object will keep re-executing and waiting for the specified interval. It's
+#' possible to stop this cycle by adding conditional logic that prevents the
+#' \code{invalidateLater} from being run.
+#'
 #' @param millis Approximate milliseconds to wait before invalidating the
 #'   current reactive context.
+#' @param session A session object. This is needed to cancel any scheduled
+#'   invalidations after a user has ended the session. If \code{NULL}, then
+#'   this invalidation will not be tied to any session, and so it will still
+#'   occur.
+#'
+#' @seealso \code{\link{reactiveTimer}} is a slightly less safe alternative.
+#'
+#' @examples
+#' \dontrun{
+#' shinyServer(function(input, output, session) {
+#'
+#'   observe({
+#'     # Re-execute this reactive expression after 1000 milliseconds
+#'     invalidateLater(1000, session)
+#'
+#'     # Do something each time this is invalidated.
+#'     # The isolate() makes this observer _not_ get invalidated and re-executed
+#'     # when input$n changes.
+#'     print(paste("The value of input$n is", isolate(input$n)))
+#'   })
+#'
+#'   # Generate a new histogram at timed intervals, but not when
+#'   # input$n changes.
+#'   output$plot <- renderPlot({
+#'     # Re-execute this reactive expression after 2000 milliseconds
+#'     invalidateLater(2000, session)
+#'     hist(isolate(input$n))
+#'   })
+#' })
+#' }
+#'
 #' @export
-invalidateLater <- function(millis) {
+invalidateLater <- function(millis, session) {
+  if (missing(session)) {
+    warning("invalidateLater should be passed a session object or NULL")
+    session <- NULL
+  }
+
   ctx <- .getReactiveEnvironment()$currentContext()
   timerCallbacks$schedule(millis, function() {
+    # Quit if the session is closed
+    if (!is.null(session) && session$isClosed()) {
+      return(invisible())
+    }
     ctx$invalidate()
   })
   invisible()
 }
 
+coerceToFunc <- function(x) {
+  force(x);
+  if (is.function(x))
+    return(x)
+  else
+    return(function() x)
+}
+
+#' Reactive polling
+#'
+#' Used to create a reactive data source, which works by periodically polling a
+#' non-reactive data source.
+#'
+#' \code{reactivePoll} works by pairing a relatively cheap "check" function with
+#' a more expensive value retrieval function. The check function will be
+#' executed periodically and should always return a consistent value until the
+#' data changes. When the check function returns a different value, then the
+#' value retrieval function will be used to re-populate the data.
+#'
+#' Note that the check function doesn't return \code{TRUE} or \code{FALSE} to
+#' indicate whether the underlying data has changed. Rather, the check function
+#' indicates change by returning a different value from the previous time it was
+#' called.
+#'
+#' For example, \code{reactivePoll} is used to implement
+#' \code{reactiveFileReader} by pairing a check function that simply returns the
+#' last modified timestamp of a file, and a value retrieval function that
+#' actually reads the contents of the file.
+#'
+#' As another example, one might read a relational database table reactively by
+#' using a check function that does \code{SELECT MAX(timestamp) FROM table} and
+#' a value retrieval function that does \code{SELECT * FROM table}.
+#'
+#' The \code{intervalMillis}, \code{checkFunc}, and \code{valueFunc} functions
+#' will be executed in a reactive context; therefore, they may read reactive
+#' values and reactive expressions.
+#'
+#' @param intervalMillis Approximate number of milliseconds to wait between
+#'   calls to \code{checkFunc}. This can be either a numeric value, or a
+#'   function that returns a numeric value.
+#' @param session The user session to associate this file reader with, or
+#'   \code{NULL} if none. If non-null, the reader will automatically stop when
+#'   the session ends.
+#' @param checkFunc A relatively cheap function whose values over time will be
+#'   tested for equality; inequality indicates that the underlying value has
+#'   changed and needs to be invalidated and re-read using \code{valueFunc}. See
+#'   Details.
+#' @param valueFunc A function that calculates the underlying value. See
+#'   Details.
+#'
+#' @return A reactive expression that returns the result of \code{valueFunc},
+#'   and invalidates when \code{checkFunc} changes.
+#'
+#' @seealso \code{\link{reactiveFileReader}}
+#'
+#' @examples
+#' \dontrun{
+#' # Assume the existence of readTimestamp and readValue functions
+#' shinyServer(function(input, output, session) {
+#'   data <- reactivePoll(1000, session, readTimestamp, readValue)
+#'   output$dataTable <- renderTable({
+#'     data()
+#'   })
+#' })
+#' }
+#'
+#' @export
+reactivePoll <- function(intervalMillis, session, checkFunc, valueFunc) {
+  intervalMillis <- coerceToFunc(intervalMillis)
+
+  rv <- reactiveValues(cookie = isolate(checkFunc()))
+
+  observe({
+    rv$cookie <- checkFunc()
+    invalidateLater(intervalMillis(), session)
+  })
+
+  # TODO: what to use for a label?
+  re <- reactive({
+    rv$cookie
+
+    valueFunc()
+
+  }, label = NULL)
+
+  return(re)
+}
+
+#' Reactive file reader
+#'
+#' Given a file path and read function, returns a reactive data source for the
+#' contents of the file.
+#'
+#' \code{reactiveFileReader} works by periodically checking the file's last
+#' modified time; if it has changed, then the file is re-read and any reactive
+#' dependents are invalidated.
+#'
+#' The \code{intervalMillis}, \code{filePath}, and \code{readFunc} functions
+#' will each be executed in a reactive context; therefore, they may read
+#' reactive values and reactive expressions.
+#'
+#' @param intervalMillis Approximate number of milliseconds to wait between
+#'   checks of the file's last modified time. This can be a numeric value, or a
+#'   function that returns a numeric value.
+#' @param session The user session to associate this file reader with, or
+#'   \code{NULL} if none. If non-null, the reader will automatically stop when
+#'   the session ends.
+#' @param filePath The file path to poll against and to pass to \code{readFunc}.
+#'   This can either be a single-element character vector, or a function that
+#'   returns one.
+#' @param readFunc The function to use to read the file; must expect the first
+#'   argument to be the file path to read. The return value of this function is
+#'   used as the value of the reactive file reader.
+#' @param ... Any additional arguments to pass to \code{readFunc} whenever it is
+#'   invoked.
+#'
+#' @return A reactive expression that returns the contents of the file, and
+#'   automatically invalidates when the file changes on disk (as determined by
+#'   last modified time).
+#'
+#' @seealso \code{\link{reactivePoll}}
+#'
+#' @examples
+#' \dontrun{
+#' # Per-session reactive file reader
+#' shinyServer(function(input, output, session)) {
+#'   fileData <- reactiveFileReader(1000, session, 'data.csv', read.csv)
+#'
+#'   output$data <- renderTable({
+#'     fileData()
+#'   })
+#' }
+#'
+#' # Cross-session reactive file reader. In this example, all sessions share
+#' # the same reader, so read.csv only gets executed once no matter how many
+#' # user sessions are connected.
+#' fileData <- reactiveFileReader(1000, session, 'data.csv', read.csv)
+#' shinyServer(function(input, output, session)) {
+#'   output$data <- renderTable({
+#'     fileData()
+#'   })
+#' }
+#' }
+#'
+#' @export
+reactiveFileReader <- function(intervalMillis, session, filePath, readFunc, ...) {
+  filePath <- coerceToFunc(filePath)
+  extraArgs <- list(...)
+
+  reactivePoll(
+    intervalMillis, session,
+    function() {
+      path <- filePath()
+      info <- file.info(path)
+      return(paste(path, info$mtime, info$size))
+    },
+    function() {
+      do.call(readFunc, c(filePath(), extraArgs))
+    }
+  )
+}
+
 #' Create a non-reactive scope for an expression
-#' 
-#' Executes the given expression in a scope where reactive values or expression 
-#' can be read, but they cannot cause the reactive scope of the caller to be 
+#'
+#' Executes the given expression in a scope where reactive values or expression
+#' can be read, but they cannot cause the reactive scope of the caller to be
 #' re-evaluated when they change.
-#' 
-#' Ordinarily, the simple act of reading a reactive value causes a relationship 
-#' to be established between the caller and the reactive value, where a change 
-#' to the reactive value will cause the caller to re-execute. (The same applies 
-#' for the act of getting a reactive expression's value.) The \code{isolate} 
+#'
+#' Ordinarily, the simple act of reading a reactive value causes a relationship
+#' to be established between the caller and the reactive value, where a change
+#' to the reactive value will cause the caller to re-execute. (The same applies
+#' for the act of getting a reactive expression's value.) The \code{isolate}
 #' function lets you read a reactive value or expression without establishing this
 #' relationship.
-#' 
+#'
 #' The expression given to \code{isolate()} is evaluated in the calling
 #' environment. This means that if you assign a variable inside the
 #' \code{isolate()}, its value will be visible outside of the \code{isolate()}.
@@ -604,20 +1037,20 @@ invalidateLater <- function(millis) {
 #' calls to the reactive expression with \code{isolate()}.
 #'
 #' @param expr An expression that can access reactive values or expressions.
-#' 
+#'
 #' @examples
 #' \dontrun{
 #' observe({
 #'   input$saveButton  # Do take a dependency on input$saveButton
-#'   
+#'
 #'   # isolate a simple expression
 #'   data <- get(isolate(input$dataset))  # No dependency on input$dataset
 #'   writeToDatabase(data)
 #' })
-#' 
+#'
 #' observe({
 #'   input$saveButton  # Do take a dependency on input$saveButton
-#'   
+#'
 #'   # isolate a whole block
 #'   data <- isolate({
 #'     a <- input$valueA   # No dependency on input$valueA or input$valueB
@@ -652,7 +1085,8 @@ invalidateLater <- function(millis) {
 #'
 #' @export
 isolate <- function(expr) {
-  ctx <- Context$new('[isolate]')
+  ctx <- Context$new('[isolate]', type='isolate')
+  on.exit(ctx$invalidate())
   ctx$run(function() {
     expr
   })

R/run-url.R

@@ -7,7 +7,7 @@
 #'   \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
-#'   port 8100.
+#'   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.
@@ -23,7 +23,7 @@
 #'
 #' @export
 runGist <- function(gist,
-                    port=8100L,
+                    port=NULL,
                     launch.browser=getOption('shiny.launch.browser',
                                              interactive())) {
 
@@ -52,7 +52,7 @@ runGist <- function(gist,
 #'   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
-#'   port 8100.
+#'   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.
@@ -67,7 +67,7 @@ runGist <- function(gist,
 #'
 #' @export
 runGitHub <- function(repo, username = getOption("github.user"),
-  ref = "master", subdir = NULL, port = 8100,
+  ref = "master", subdir = NULL, port = NULL,
   launch.browser = getOption('shiny.launch.browser', interactive())) {
 
   if (is.null(ref)) {
@@ -102,7 +102,7 @@ runGitHub <- function(repo, username = getOption("github.user"),
 #'   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
-#'   port 8100.
+#'   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.
@@ -117,7 +117,7 @@ runGitHub <- function(repo, username = getOption("github.user"),
 #' }
 #'
 #' @export
-runUrl <- function(url, filetype = NULL, subdir = NULL, port = 8100,
+runUrl <- function(url, filetype = NULL, subdir = NULL, port = NULL,
   launch.browser = getOption('shiny.launch.browser', interactive())) {
 
   if (!is.null(subdir) && ".." %in% strsplit(subdir, '/')[[1]])

R/sessioncontext.R

@@ -0,0 +1,20 @@
+# Keeps the context associated with a ShinySession reference object for the
+# duration of a request. Used to emit reactive evaluation information to the
+# appropriate session when showcase mode is enabled.
+
+.sessionContext <- new.env(parent=emptyenv())
+.beginShowcaseSessionContext <- function(session) {
+  assign("session", session, envir = .sessionContext)
+}
+
+.endShowcaseSessionContext <- function() {
+  if (exists("session", where = .sessionContext))
+    remove("session", envir = .sessionContext)
+}
+
+.getShowcaseSessionContext <- function() {
+  if (exists("session", where = .sessionContext))
+    .sessionContext$session
+  else
+    NULL
+}

R/shinyui.R

@@ -1,52 +1,95 @@
-
+#' @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)
@@ -54,33 +97,81 @@ includeHTML <- function(path) {
   return(HTML(paste(lines, collapse='\r\n')))
 }
 
+#' @rdname include
 #' @export
 includeText <- function(path) {
   dependsOnFile(path)
   lines <- readLines(path, warn=FALSE, encoding='UTF-8')
-  return(HTML(paste(lines, collapse='\r\n')))
+  return(paste(lines, collapse='\r\n'))
 }
 
+#' @rdname include
 #' @export
 includeMarkdown <- function(path) {
   if (!require(markdown))
     stop("Markdown package is not installed")
-  
+
   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')), ...))
+}
+
+#' Load the MathJax library and typeset math expressions
+#'
+#' This function adds MathJax to the page and typeset the math expressions (if
+#' found) in the content \code{...}. It only needs to be called once in an app
+#' unless the content is rendered \emph{after} the page is loaded, e.g. via
+#' \code{\link{renderUI}}, in which case we have to call it explicitly every
+#' time we write math expressions to the output.
+#' @param ... any HTML elements to apply MathJax to
+#' @export
+#' @examples withMathJax(helpText("Some math here $$\\alpha+\\beta$$"))
+#' # 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'
+  tagList(
+    tags$head(
+      singleton(tags$script(HTML('window.MathJax = {skipStartupTypeset: true};'))),
+      singleton(tags$script(src = path, type = 'text/javascript'))
+    ),
+    ...,
+    tags$script(HTML('$(function() {
+                        setTimeout(function() {MathJax.Hub.Typeset();}, 200);
+                      });'))
+  )
+}
 
 #' 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 
+#' 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
@@ -89,39 +180,10 @@ singleton <- function(x) {
   return(x)
 }
 
-renderPage <- function(ui, connection) {
-  
-  # provide a filter so we can intercept head tag requests
-  context <- new.env()
-  context$head <- character()
-  context$singletons <- character()
-  context$filter <- function(content) {
-    if (inherits(content, 'shiny.singleton')) {
-      sig <- digest(content, algo='sha1')
-      if (sig %in% context$singletons)
-        return(FALSE)
-      context$singletons <- c(sig, context$singletons)
-    }
-    
-    if (isTag(content) && identical(content$name, "head")) {
-      textConn <- textConnection(NULL, "w") 
-      textConnWriter <- function(text) cat(text, file = textConn)
-      tagWrite(content$children, textConnWriter, 1, context)
-      context$head <- append(context$head, textConnectionValue(textConn))
-      close(textConn)
-      return (FALSE)
-    }
-    else {
-      return (TRUE)
-    }
-  }
-  
-  # write ui HTML to a character vector
-  textConn <- textConnection(NULL, "w") 
-  tagWrite(ui, function(text) cat(text, file = textConn), 0, context)
-  uiHTML <- textConnectionValue(textConn)
-  close(textConn)
- 
+renderPage <- function(ui, connection, showcase=0) {
+
+  result <- renderTags(ui)
+
   # write preamble
   writeLines(c('<!DOCTYPE html>',
                '<html>',
@@ -130,15 +192,28 @@ renderPage <- function(ui, connection) {
                '  <script src="shared/jquery.js" type="text/javascript"></script>',
                '  <script src="shared/shiny.js" type="text/javascript"></script>',
                '  <link rel="stylesheet" type="text/css" href="shared/shiny.css"/>',
-               context$head,
+               sprintf('  <script type="application/shiny-singletons">%s</script>',
+                       paste(result$singletons, collapse = ',')
+               )),
+              con = connection)
+  if (showcase > 0) {
+    writeLines(as.character(showcaseHead()), con = connection)
+  }
+  writeLines(c(result$head,
                '</head>',
-               '<body>', 
+               '<body>',
                recursive=TRUE),
              con = connection)
-  
-  # write UI html to connection
-  writeLines(uiHTML, con = connection)
-  
+
+  if (showcase > 0) {
+    # in showcase mode, emit containing elements and app HTML
+    writeLines(as.character(showcaseBody(result$html)),
+               con = connection)
+  } else {
+    # in normal mode, write UI html directly to connection
+    writeLines(result$html, con = connection)
+  }
+
   # write end document
   writeLines(c('</body>',
                '</html>'),
@@ -146,35 +221,35 @@ renderPage <- function(ui, connection) {
 }
 
 #' Create a Shiny UI handler
-#' 
-#' Register a UI handler by providing a UI definition (created with e.g. 
+#'
+#' Register a UI handler by providing a UI definition (created with e.g.
 #' \link{pageWithSidebar}) and web server path (typically "/", the default
 #' value).
-#' 
+#'
 #' @param ui A user-interace definition
 #' @param path The web server path to server the UI from
 #' @return Called for its side-effect of registering a UI handler
-#' 
+#'
 #' @examples
 #' el <- div(HTML("I like <u>turtles</u>"))
 #' cat(as.character(el))
-#'   
+#'
 #' @examples
 #' # Define UI
 #' shinyUI(pageWithSidebar(
-#'   
+#'
 #'   # Application title
 #'   headerPanel("Hello Shiny!"),
-#'   
+#'
 #'   # Sidebar with a slider input
 #'   sidebarPanel(
-#'     sliderInput("obs", 
-#'                 "Number of observations:", 
-#'                 min = 0, 
-#'                 max = 1000, 
+#'     sliderInput("obs",
+#'                 "Number of observations:",
+#'                 min = 0,
+#'                 max = 1000,
 #'                 value = 500)
 #'   ),
-#'   
+#'
 #'   # Show a plot of the generated distribution
 #'   mainPanel(
 #'     plotOutput("distPlot")
@@ -183,20 +258,28 @@ renderPage <- function(ui, connection) {
 #'
 #' @export
 shinyUI <- function(ui, path='/') {
-  
-  force(ui)
-  
-  registerClient({
-    
-    function(ws, header) {
 
-      if (header$PATH != path)
+  force(ui)
+
+  registerClient({
+
+    function(req) {
+      if (!identical(req$REQUEST_METHOD, 'GET'))
         return(NULL)
-      
-      textConn <- textConnection(NULL, "w") 
+
+      if (req$PATH_INFO != path)
+        return(NULL)
+
+      textConn <- textConnection(NULL, "w")
       on.exit(close(textConn))
-      
-      renderPage(ui, textConn)
+
+      showcaseMode <- .globals$showcaseDefault
+      if (.globals$showcaseOverride) {
+        mode <- showcaseModeOfReq(req)
+        if (!is.null(mode))
+          showcaseMode <- mode
+      }
+      renderPage(ui, textConn, showcaseMode)
       html <- paste(textConnectionValue(textConn), collapse='\n')
       return(httpResponse(200, content=html))
     }

R/shinywrappers.R

@@ -1,53 +1,49 @@
-suppressPackageStartupMessages({
-  library(caTools)
-  library(xtable)
-})
+globalVariables('func')
 
 #' Plot Output
-#' 
-#' Renders a reactive plot that is suitable for assigning to an \code{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}.
 #'
-#' For output, it will try to use the following devices, in this order:
-#' quartz (via \code{\link[grDevices]{png}}), then \code{\link[Cairo]{CairoPNG}},
-#' and finally \code{\link[grDevices]{png}}. This is in order of quality of
-#' output. Notably, plain \code{png} output on Linux and Windows may not
-#' antialias some point shapes, resulting in poor quality 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 
+#' @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 
+#'   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 ... Arguments to be passed through to \code{\link[grDevices]{png}}. 
+#' @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', ...,
+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 {
-    func <- exprToFunction(expr, env, quoted)
+    installExprFunction(expr, "func", env, quoted)
   }
 
-
   args <- list(...)
-  
+
   if (is.function(width))
     widthWrapper <- reactive({ width() })
   else
@@ -58,97 +54,232 @@ renderPlot <- function(expr, width='auto', height='auto', ...,
   else
     heightWrapper <- NULL
 
-  return(function(shinyapp, name, ...) {
-    png.file <- tempfile(fileext='.png')
-    
+  return(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 
+    # will inherently cause a reactive plot to redraw (unless width and
     # height were explicitly specified).
-    prefix <- '.shinyout_'
+    prefix <- 'output_'
     if (width == 'auto')
-      width <- shinyapp$session$get(paste(prefix, name, '_width', sep=''));
+      width <- shinysession$clientData[[paste(prefix, name, '_width', sep='')]];
     if (height == 'auto')
-      height <- shinyapp$session$get(paste(prefix, name, '_height', sep=''));
-    
-    if (width <= 0 || height <= 0)
+      height <- shinysession$clientData[[paste(prefix, name, '_height', sep='')]];
+
+    if (is.null(width) || is.null(height) || width <= 0 || height <= 0)
       return(NULL)
 
-    # If quartz is available, use png() (which will default to quartz).
-    # Otherwise, if the Cairo package is installed, use CairoPNG().
-    # Finally, if neither quartz nor Cairo, use png().
-    if (capabilities("aqua")) {
-      pngfun <- png
-    } else if (nchar(system.file(package = "Cairo"))) {
-      require(Cairo)
-      pngfun <- CairoPNG
-    } else {
-      pngfun <- png
+    # Resolution multiplier
+    pixelratio <- shinysession$clientData$pixelratio
+    if (is.null(pixelratio))
+      pixelratio <- 1
+
+    coordmap <- NULL
+    plotFunc <- function() {
+      # Actually perform the plotting
+      func()
+
+      # 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
+      )
     }
 
-    do.call(pngfun, c(args, filename=png.file, width=width, height=height))
-    on.exit(unlink(png.file))
-    tryCatch(
-      func(),
-      finally=dev.off())
-    
-    bytes <- file.info(png.file)$size
-    if (is.na(bytes))
-      return(NULL)
-    
-    pngData <- readBin(png.file, 'raw', n=bytes)
-    if (shinyapp$allowDataUriScheme) {
-      b64 <- base64encode(pngData)
-      return(paste("data:image/png;base64,", b64, sep=''))
-    }
-    else {
-      imageUrl <- shinyapp$savePlot(name, pngData, 'image/png')
-      return(imageUrl)
-    }
+    outfile <- do.call(plotPNG, c(plotFunc, width=width*pixelratio,
+                                  height=height*pixelratio, res=res*pixelratio, args))
+    on.exit(unlink(outfile))
+
+    # Return a list of attributes for the img
+    return(list(
+      src=shinysession$fileUrl(name, outfile, contentType='image/png'),
+      width=width, height=height, coordmap=coordmap
+    ))
   })
 }
 
-#' Table Output
-#' 
-#' Creates a reactive table that is suitable for assigning to an \code{output} 
+#' Image file output
+#'
+#' Renders a reactive image that is suitable for assigning to an \code{output}
 #' slot.
-#' 
+#'
+#' The expression \code{expr} must return a list containing the attributes for
+#' the \code{img} object on the client web page. For the image to display,
+#' properly, the list must have at least one entry, \code{src}, which is the
+#' path to the image file. It may also useful to have a \code{contentType}
+#' entry specifying the MIME type of the image. If one is not provided,
+#' \code{renderImage} will try to autodetect the type, based on the file
+#' extension.
+#'
+#' Other elements such as \code{width}, \code{height}, \code{class}, and
+#' \code{alt}, can also be added to the list, and they will be used as
+#' attributes in the \code{img} object.
+#'
+#' The corresponding HTML output tag should be \code{div} or \code{img} and have
+#' the CSS class name \code{shiny-image-output}.
+#'
+#' @seealso For more details on how the images are generated, and how to control
+#'   the output, see \code{\link{plotPNG}}.
+#'
+#' @param expr An expression that returns a list.
+#' @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 deleteFile Should the file in \code{func()$src} be deleted after
+#'   it is sent to the client browser? Generally speaking, if the image is a
+#'   temp file generated within \code{func}, then this should be \code{TRUE};
+#'   if the image is not a temp file, this should be \code{FALSE}.
+#'
+#' @export
+#'
+#' @examples
+#' \dontrun{
+#'
+#' shinyServer(function(input, output, clientData) {
+#'
+#'   # A plot of fixed size
+#'   output$plot1 <- renderImage({
+#'     # A temp file to save the output. It will be deleted after renderImage
+#'     # sends it, because deleteFile=TRUE.
+#'     outfile <- tempfile(fileext='.png')
+#'
+#'     # Generate a png
+#'     png(outfile, width=400, height=400)
+#'     hist(rnorm(input$n))
+#'     dev.off()
+#'
+#'     # Return a list
+#'     list(src = outfile,
+#'          alt = "This is alternate text")
+#'   }, deleteFile = TRUE)
+#'
+#'   # A dynamically-sized plot
+#'   output$plot2 <- renderImage({
+#'     # Read plot2's width and height. These are reactive values, so this
+#'     # expression will re-run whenever these values change.
+#'     width  <- clientData$output_plot2_width
+#'     height <- clientData$output_plot2_height
+#'
+#'     # A temp file to save the output.
+#'     outfile <- tempfile(fileext='.png')
+#'
+#'     png(outfile, width=width, height=height)
+#'     hist(rnorm(input$obs))
+#'     dev.off()
+#'
+#'     # Return a list containing the filename
+#'     list(src = outfile,
+#'          width = width,
+#'          height = height,
+#'          alt = "This is alternate text")
+#'   }, deleteFile = TRUE)
+#'
+#'   # Send a pre-rendered image, and don't delete the image after sending it
+#'   output$plot3 <- renderImage({
+#'     # When input$n is 1, filename is ./images/image1.jpeg
+#'     filename <- normalizePath(file.path('./images',
+#'                               paste('image', input$n, '.jpeg', sep='')))
+#'
+#'     # Return a list containing the filename
+#'     list(src = filename)
+#'   }, deleteFile = FALSE)
+#' })
+#'
+#' }
+renderImage <- function(expr, env=parent.frame(), quoted=FALSE,
+                        deleteFile=TRUE) {
+  installExprFunction(expr, "func", env, quoted)
+
+  return(function(shinysession, name, ...) {
+    imageinfo <- func()
+    # Should the file be deleted after being sent? If .deleteFile not set or if
+    # TRUE, then delete; otherwise don't delete.
+    if (deleteFile) {
+      on.exit(unlink(imageinfo$src))
+    }
+
+    # If contentType not specified, autodetect based on extension
+    if (is.null(imageinfo$contentType)) {
+      contentType <- getContentType(sub('^.*\\.', '', basename(imageinfo$src)))
+    } else {
+      contentType <- imageinfo$contentType
+    }
+
+    # Extra values are everything in imageinfo except 'src' and 'contentType'
+    extra_attr <- imageinfo[!names(imageinfo) %in% c('src', 'contentType')]
+
+    # Return a list with src, and other img attributes
+    c(src = shinysession$fileUrl(name, file=imageinfo$src, contentType=contentType),
+      extra_attr)
+  })
+}
+
+
+#' 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 
+#'
+#' @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 
+#' @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 {
-    func <- exprToFunction(expr, env, quoted)
+    installExprFunction(expr, "func", env, quoted)
   }
 
   function() {
     classNames <- getOption('shiny.table.class', 'data table table-bordered table-condensed')
     data <- func()
 
-    if (is.null(data))
+    if (is.null(data) || identical(data, data.frame()))
       return("")
-    
+
     return(paste(
       capture.output(
-        print(xtable(data, ...), 
-              type='html', 
+        print(xtable(data, ...),
+              type='html',
               html.table.attributes=paste('class="',
                                           htmlEscape(classNames, TRUE),
                                           '"',
@@ -158,41 +289,41 @@ renderTable <- function(expr, ..., env=parent.frame(), quoted=FALSE, func=NULL)
 }
 
 #' Printable Output
-#' 
-#' Makes a reactive version of the given function that captures any printed 
-#' output, and also captures its printable result (unless 
-#' \code{\link{invisible}}), into a string. The resulting function is suitable 
+#'
+#' Makes a reactive version of the given function that captures any printed
+#' output, and also captures its printable result (unless
+#' \code{\link{invisible}}), into a string. The resulting function is suitable
 #' for assigning to an  \code{output} slot.
-#' 
-#' The corresponding HTML output tag can be anything (though \code{pre} is 
+#'
+#' The corresponding HTML output tag can be anything (though \code{pre} is
 #' recommended if you need a monospace font and whitespace preserved) and should
 #' have the CSS class name \code{shiny-text-output}.
-#' 
-#' The result of executing \code{func} will be printed inside a 
+#'
+#' The result of executing \code{func} will be printed inside a
 #' \code{\link[utils]{capture.output}} call.
-#' 
-#' Note that unlike most other Shiny output functions, if the given function 
-#' returns \code{NULL} then \code{NULL} will actually be visible in the output. 
+#'
+#' Note that unlike most other Shiny output functions, if the given function
+#' returns \code{NULL} then \code{NULL} will actually be visible in the output.
 #' To display nothing, make your function return \code{\link{invisible}()}.
-#' 
-#' @param expr An expression that may print output and/or return a printable R 
+#'
+#' @param expr An expression that may print output and/or return a printable R
 #'   object.
 #' @param env The environment in which to evaluate \code{expr}.
 #' @param quoted Is \code{expr} a quoted expression (with \code{quote()})? This
-#' @param func A function that may print output and/or return a printable R 
+#' @param func A function that may print output and/or return a printable R
 #'   object (deprecated; use \code{expr} instead).
-#'   
-#' @seealso \code{\link{renderText}} for displaying the value returned from a 
+#'
+#' @seealso \code{\link{renderText}} for displaying the value returned from a
 #'   function, instead of the printed output.
 #'
 #' @example res/text-example.R
-#'   
+#'
 #' @export
 renderPrint <- function(expr, env=parent.frame(), quoted=FALSE, func=NULL) {
   if (!is.null(func)) {
     shinyDeprecated(msg="renderPrint: argument 'func' is deprecated. Please use 'expr' instead.")
   } else {
-    func <- exprToFunction(expr, env, quoted)
+    installExprFunction(expr, "func", env, quoted)
   }
 
   function() {
@@ -205,18 +336,18 @@ renderPrint <- function(expr, env=parent.frame(), quoted=FALSE, func=NULL) {
 }
 
 #' Text Output
-#' 
-#' Makes a reactive version of the given function that also uses 
-#' \code{\link[base]{cat}} to turn its result into a single-element character 
+#'
+#' Makes a reactive version of the given function that also uses
+#' \code{\link[base]{cat}} to turn its result into a single-element character
 #' vector.
-#' 
-#' The corresponding HTML output tag can be anything (though \code{pre} is 
+#'
+#' The corresponding HTML output tag can be anything (though \code{pre} is
 #' recommended if you need a monospace font and whitespace preserved) and should
 #' have the CSS class name \code{shiny-text-output}.
-#' 
-#' The result of executing \code{func} will passed to \code{cat}, inside a 
+#'
+#' The result of executing \code{func} will passed to \code{cat}, inside a
 #' \code{\link[utils]{capture.output}} call.
-#' 
+#'
 #' @param expr An expression that returns an R object that can be used as an
 #'   argument to \code{cat}.
 #' @param env The environment in which to evaluate \code{expr}.
@@ -224,18 +355,18 @@ renderPrint <- function(expr, env=parent.frame(), quoted=FALSE, func=NULL) {
 #'   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 as an
 #'   argument to \code{cat}.(deprecated; use \code{expr} instead).
-#'   
+#'
 #' @seealso \code{\link{renderPrint}} for capturing the print output of a
 #'   function, rather than the returned text value.
 #'
 #' @example res/text-example.R
-#'   
+#'
 #' @export
 renderText <- function(expr, env=parent.frame(), quoted=FALSE, func=NULL) {
   if (!is.null(func)) {
     shinyDeprecated(msg="renderText: argument 'func' is deprecated. Please use 'expr' instead.")
   } else {
-    func <- exprToFunction(expr, env, quoted)
+    installExprFunction(expr, "func", env, quoted)
   }
 
   function() {
@@ -245,29 +376,29 @@ renderText <- function(expr, env=parent.frame(), quoted=FALSE, func=NULL) {
 }
 
 #' UI Output
-#' 
+#'
 #' \bold{Experimental feature.} Makes a reactive version of a function that
 #' generates HTML using the Shiny UI library.
-#' 
+#'
 #' The corresponding HTML output tag should be \code{div} and have the CSS class
 #' name \code{shiny-html-output} (or use \code{\link{uiOutput}}).
-#' 
-#' @param expr An expression that returns a Shiny tag object, \code{\link{HTML}}, 
+#'
+#' @param expr An expression that returns a Shiny tag object, \code{\link{HTML}},
 #'   or a list of such objects.
 #' @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 a Shiny tag object, \code{\link{HTML}}, 
+#' @param func A function that returns a Shiny tag object, \code{\link{HTML}},
 #'   or a list of such objects (deprecated; use \code{expr} instead).
-#'   
+#'
 #' @seealso conditionalPanel
-#'   
+#'
 #' @export
 #' @examples
 #' \dontrun{
 #'   output$moreControls <- renderUI({
 #'     list(
-#'       
+#'
 #'     )
 #'   })
 #' }
@@ -275,42 +406,48 @@ renderUI <- function(expr, env=parent.frame(), quoted=FALSE, func=NULL) {
   if (!is.null(func)) {
     shinyDeprecated(msg="renderUI: argument 'func' is deprecated. Please use 'expr' instead.")
   } else {
-    func <- exprToFunction(expr, env, quoted)
+    installExprFunction(expr, "func", env, quoted)
   }
 
-  function() {
+  function(shinysession, name, ...) {
     result <- func()
     if (is.null(result) || length(result) == 0)
       return(NULL)
-    # Wrap result in tagList in case it is an ordinary list
-    return(as.character(tagList(result)))
+
+    result <- takeSingletons(result, shinysession$singletons, desingleton=FALSE)$ui
+    result <- surroundSingletons(result)
+
+    # renderTags returns a list with head, singletons, and html
+    output <- doRenderTags(result)
+
+    return(output)
   }
 }
 
 #' File Downloads
-#' 
+#'
 #' Allows content from the Shiny application to be made available to the user as
-#' file downloads (for example, downloading the currently visible data as a CSV 
-#' file). Both filename and contents can be calculated dynamically at the time 
-#' the user initiates the download. Assign the return value to a slot on 
-#' \code{output} in your server function, and in the UI use 
+#' file downloads (for example, downloading the currently visible data as a CSV
+#' file). Both filename and contents can be calculated dynamically at the time
+#' the user initiates the download. Assign the return value to a slot on
+#' \code{output} in your server function, and in the UI use
 #' \code{\link{downloadButton}} or \code{\link{downloadLink}} to make the
 #' download available.
-#' 
-#' @param filename A string of the filename, including extension, that the 
-#'   user's web browser should default to when downloading the file; or a 
-#'   function that returns such a string. (Reactive values and functions may be 
+#'
+#' @param filename A string of the filename, including extension, that the
+#'   user's web browser should default to when downloading the file; or a
+#'   function that returns such a string. (Reactive values and functions may be
 #'   used from this function.)
-#' @param content A function that takes a single argument \code{file} that is a 
+#' @param content A function that takes a single argument \code{file} that is a
 #'   file path (string) of a nonexistent temp file, and writes the content to
 #'   that file path. (Reactive values and functions may be used from this
 #'   function.)
-#' @param contentType A string of the download's 
-#'   \href{http://en.wikipedia.org/wiki/Internet_media_type}{content type}, for 
-#'   example \code{"text/csv"} or \code{"image/png"}. If \code{NULL} or 
-#'   \code{NA}, the content type will be guessed based on the filename 
+#' @param contentType A string of the download's
+#'   \href{http://en.wikipedia.org/wiki/Internet_media_type}{content type}, for
+#'   example \code{"text/csv"} or \code{"image/png"}. If \code{NULL} or
+#'   \code{NA}, the content type will be guessed based on the filename
 #'   extension, or \code{application/octet-stream} if the extension is unknown.
-#'   
+#'
 #' @examples
 #' \dontrun{
 #' # In server.R:
@@ -322,18 +459,66 @@ renderUI <- function(expr, env=parent.frame(), quoted=FALSE, func=NULL) {
 #'     write.csv(data, file)
 #'   }
 #' )
-#' 
+#'
 #' # In ui.R:
 #' downloadLink('downloadData', 'Download')
 #' }
-#' 
+#'
 #' @export
 downloadHandler <- function(filename, content, contentType=NA) {
-  return(function(shinyapp, name, ...) {
-    shinyapp$registerDownload(name, filename, contentType, content)
+  return(function(shinysession, name, ...) {
+    shinysession$registerDownload(name, filename, contentType, content)
   })
 }
 
+#' Table output with the JavaScript library DataTables
+#'
+#' Makes a reactive version of the given function that returns a data frame (or
+#' matrix), which will be rendered with the DataTables library. Paging,
+#' searching, filtering, and sorting can be done on the R side using Shiny as
+#' the server infrastructure.
+#'
+#' For the \code{options} argument, the character elements that have the class
+#' \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.
+#' @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.
+#' @param searchDelay The delay for searching, in milliseconds (to avoid too
+#'   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/}).
+#' @references \url{http://datatables.net}
+#' @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.');}")
+#'   )
+#' )
+renderDataTable <- function(expr, options = NULL, searchDelay = 500,
+                            callback = 'function(oTable) {}',
+                            env = parent.frame(), quoted = FALSE) {
+  installExprFunction(expr, "func", env, quoted)
+
+  function(shinysession, name, ...) {
+    res <- checkAsIs(if (is.function(options)) options() else options)
+    data <- func()
+    if (length(dim(data)) != 2) return() # expects a rectangular data object
+    action <- shinysession$registerDataTable(name, data)
+    list(
+      colnames = colnames(data), action = action, options = res$options,
+      evalOptions = if (length(res$eval)) I(res$eval), searchDelay = searchDelay,
+      callback = paste(callback, collapse = '\n')
+    )
+  }
+}
+
 
 # Deprecated functions ------------------------------------------------------
 

R/showcase.R

@@ -0,0 +1,151 @@
+
+# Given the name of a license, return the appropriate link HTML for the
+# license, which may just be the name of the license if the name is
+# unrecognized.
+#
+# Recognizes the 'standard' set of licenses used for R packages
+# (see http://cran.r-project.org/doc/manuals/R-exts.html)
+licenseLink <- function(licenseName) {
+  licenses <- list(
+    "GPL-2" = "https://gnu.org/licenses/gpl-2.0.txt",
+    "GPL-3" = "https://gnu.org/licenses/gpl-3.0.txt",
+    "LGPL-3" = "https://www.gnu.org/licenses/lgpl-3.0.txt",
+    "LGPL-2" = "http://www.gnu.org/licenses/old-licenses/lgpl-2.0.txt",
+    "LGPL-2.1" = "http://www.gnu.org/licenses/lgpl-2.1.txt",
+    "AGPL-3" = "http://www.gnu.org/licenses/agpl-3.0.txt",
+    "Artistic-2.0" = "http://www.r-project.org/Licenses/Artistic-2.0",
+    "BSD_2_clause" = "http://www.r-project.org/Licenses/BSD_2_clause",
+    "BSD_3_clause" = "http://www.r-project.org/Licenses/BSD_3_clause",
+    "MIT" = "http://www.r-project.org/Licenses/MIT")
+  if (exists(licenseName, where = licenses)) {
+    tags$a(href=licenses[[licenseName]], licenseName)
+  } else {
+    licenseName
+  }
+}
+
+# Returns tags containing showcase directives intended for the <HEAD> of the
+# document.
+showcaseHead <- function() {
+  mdfile <- file.path.ci(getwd(), 'Readme.md')
+  with(tags, tagList(
+    script(src="shared/highlight/highlight.pack.js"),
+    script(src="shared/showdown/compressed/showdown.js"),
+    script(src="shared/jqueryui/1.10.3/jquery-ui.min.js"),
+    script(src="shared/shiny-showcase.js"),
+    link(rel="stylesheet", type="text/css",
+         href="shared/highlight/rstudio.css"),
+    link(rel="stylesheet", type="text/css",
+         href="shared/shiny-showcase.css"),
+    link(rel="stylesheet", type="text/css",
+         href="shared/font-awesome/css/font-awesome.min.css"),
+    if (file.exists(mdfile))
+      script(type="text/markdown", id="showcase-markdown-content",
+        paste(readLines(mdfile), collapse="\n"))
+    else ""
+  ))
+}
+
+# Returns tags containing the application metadata (title and author) in
+# showcase mode.
+appMetadata <- function(desc) {
+  cols <- colnames(desc)
+  if ("Title" %in% cols)
+    with(tags, h4(class="muted shiny-showcase-apptitle", desc[1,"Title"],
+      if ("Author" %in% cols) small(
+        br(), "by",
+        if ("AuthorUrl" %in% cols)
+          a(href=desc[1,"AuthorUrl"], class="shiny-showcase-appauthor",
+            desc[1,"Author"])
+        else
+          desc[1,"Author"],
+        if ("AuthorEmail" %in% cols)
+          a(href=paste("mailto:", desc[1,"AuthorEmail"], sep = ''),
+            class="shiny-showcase-appauthoreemail",
+            desc[1,"AuthorEmail"])
+        else "")
+      else ""))
+  else ""
+}
+
+# Returns tags containing the application's code in Bootstrap-style tabs in
+# showcase mode.
+showcaseCodeTabs <- function(codeLicense) {
+  rFiles <- list.files(pattern = "\\.[rR]$")
+  with(tags, div(id="showcase-code-tabs",
+    a(id="showcase-code-position-toggle",
+      class="btn btn-default btn-small",
+      onclick="toggleCodePosition()",
+      i(class="fa fa-level-up", "show with app")),
+    ul(class="nav nav-tabs",
+       lapply(rFiles, function(rFile) {
+         li(class=if (tolower(rFile) == "server.r") "active" else "",
+            a(href=paste("#", gsub(".", "_", rFile, fixed=TRUE),
+                         "_code", sep=""),
+              "data-toggle"="tab", rFile))
+       })),
+    div(class="tab-content", id="showcase-code-content",
+        lapply(rFiles, function(rFile) {
+          div(class=paste("tab-pane",
+                          if (tolower(rFile) == "server.r") " active" else "",
+                          sep=""),
+              id=paste(gsub(".", "_", rFile, fixed=TRUE),
+                       "_code", sep=""),
+              pre(class="shiny-code",
+                  # we need to prevent the indentation of <code> ... </code>
+                  HTML(format(tags$code(
+                    class="language-r",
+                    paste(readLines(file.path.ci(getwd(), rFile)),
+                          collapse="\n")
+                  ), indent = FALSE))))
+        })),
+    codeLicense))
+}
+
+# Returns tags containing the showcase application information (readme and
+# code).
+showcaseAppInfo <- function() {
+  descfile <- file.path.ci(getwd(), "DESCRIPTION")
+  hasDesc <- file.exists(descfile)
+  readmemd <- file.path.ci(getwd(), "Readme.md")
+  hasReadme <- file.exists(readmemd)
+  if (hasDesc) {
+    desc <- read.dcf(descfile)
+  }
+  with(tags,
+    div(class="container-fluid shiny-code-container well",
+        id="showcase-well",
+        div(class="row-fluid",
+          if (hasDesc || hasReadme) {
+            div(id="showcase-app-metadata", class="span4",
+                if (hasDesc) appMetadata(desc) else "",
+                if (hasReadme) div(id="readme-md"))
+          } else "",
+          div(id="showcase-code-inline",
+              class=if (hasReadme || hasDesc) "span8" else "span10 offset1",
+              showcaseCodeTabs(
+                if (hasDesc && "License" %in% colnames(desc)) {
+                  small(class="showcase-code-license muted",
+                        "Code license: ",
+                        licenseLink(desc[1,"License"]))
+                } else "")))))
+}
+
+
+# Returns the body of the showcase document, given the HTML it should wrap.
+showcaseBody <- function(htmlBody) {
+  with(tags, tagList(
+    table(id="showcase-app-code",
+          tr(td(id="showcase-app-container",
+                class="showcase-app-container-expanded",
+                HTML(htmlBody),
+             td(id="showcase-sxs-code",
+                class="showcase-sxs-code-collapsed")))),
+    showcaseAppInfo()))
+}
+
+# Sets the defaults for showcase mode (for app boot).
+setShowcaseDefault <- function(showcaseDefault) {
+  .globals$showcaseDefault <- showcaseDefault
+  .globals$showcaseOverride <- as.logical(showcaseDefault)
+}

R/slider.R

@@ -3,19 +3,17 @@ hasDecimals <- function(value) {
   return (!identical(value, truncatedValue))
 }
 
-#' Animation Options
-#' 
-#' Creates an options object for customizing animations for \link{sliderInput}.
-#' 
+#' @rdname sliderInput
+#'
 #' @param interval The interval, in milliseconds, between each animation step.
-#' @param loop \code{TRUE} to automatically restart the animation when it 
+#' @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 
+#' @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,
@@ -30,9 +28,9 @@ animationOptions <- function(interval=1000,
 # 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) 
+# (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) {
@@ -40,25 +38,25 @@ slider <- function(inputId, min, max, value, step = NULL, ...,
   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, amd value must all be numeric values")
-  else if (min(value) < min) 
-    stop(paste("slider initial value", value, 
+  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, 
+  else if (max(value) > max)
+    stop(paste("slider initial value", value,
                "is greater than the specified maximum"))
-  else if (min > max) 
+  else if (min > max)
     stop(paste("slider maximum is greater than minimum"))
   else if (!is.null(step)) {
-    if (!is.numeric(step)) 
+    if (!is.numeric(step))
       stop("step is not a numeric value")
-    if (step > (max - min)) 
+    if (step > (max - min))
       stop("step is greater than range")
   }
-  
+
   # step
   range <- max - min
   if (is.null(step)) {
@@ -68,7 +66,7 @@ slider <- function(inputId, min, max, value, step = NULL, ...,
     else
       step = 1
   }
-  
+
   # Default state is to not have ticks
   if (identical(ticks, TRUE)) {
     # Automatic ticks
@@ -99,25 +97,35 @@ slider <- function(inputId, min, max, value, step = NULL, ...,
   else {
     ticks <- NULL
   }
-  
+
   # build slider
-  sliderFragment <- list(tags$input(
-    id=inputId, type="slider", 
-    name=inputId, value=paste(value, collapse=';'), class="jslider",
-    'data-from'=min, 'data-to'=max, 'data-step'=step,
-    'data-skin'='plastic', 'data-round'=round, 'data-locale'=locale,
-    'data-format'=format, 'data-scale'=ticks,
-    'data-smooth'=FALSE))
+  sliderFragment <- list(
+    singleton(tags$head(
+      tags$link(rel="stylesheet",
+                type="text/css",
+                href="shared/slider/css/jquery.slider.min.css"),
+
+      tags$script(src="shared/slider/js/jquery.slider.min.js")
+    )),
+    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
+    )
+  )
 
   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='#',
@@ -128,6 +136,6 @@ slider <- function(inputId, min, max, value, step = NULL, ...,
                       tags$span(class='play', animate$playButton),
                       tags$span(class='pause', animate$pauseButton)))
   }
-  
+
   return(sliderFragment)
 }

R/tags.R

@@ -15,26 +15,26 @@ htmlEscape <- local({
     `\n` = '&#10;'
   )
   .htmlSpecialsPatternAttrib <- paste(names(.htmlSpecialsAttrib), collapse='|')
-  
+
   function(text, attribute=TRUE) {
     pattern <- if(attribute)
-      .htmlSpecialsPatternAttrib 
+      .htmlSpecialsPatternAttrib
     else
       .htmlSpecialsPattern
-    
+
     # Short circuit in the common case that there's nothing to escape
     if (!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)
   }
 })
@@ -46,22 +46,19 @@ isTag <- function(x) {
 #' @S3method print shiny.tag
 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
 #' @S3method format shiny.tag
-format.shiny.tag <- function(x, ...) {
-  as.character.shiny.tag(x)
+format.shiny.tag <- function(x, ..., singletons = character(0), indent = 0) {
+  as.character(renderTags(x, singletons = singletons, indent = indent)$html)
 }
 
 #' @S3method as.character shiny.tag
 as.character.shiny.tag <- function(x, ...) {
-  f = file()
-  on.exit(close(f))
-  textWriter <- function(text) {
-    cat(text, file=f)
-  }
-  tagWrite(x, textWriter)
-  return(HTML(paste(readLines(f, warn=FALSE), collapse='\n')))
+  renderTags(x)$html
 }
 
 #' @S3method print shiny.tag.list
@@ -73,14 +70,26 @@ format.shiny.tag.list <- format.shiny.tag
 #' @S3method as.character shiny.tag.list
 as.character.shiny.tag.list <- as.character.shiny.tag
 
+#' @S3method print html
+print.html <- function(x, ...) {
+  cat(x, "\n")
+  invisible(x)
+}
+
+#' @S3method format html
+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(...)
@@ -88,136 +97,160 @@ tagList <- function(...) {
   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$p("Text here"))
+#' tagList(x)
 tag <- function(`_tag_name`, varArgs) {
-  
-  # create basic tag data structure
-  tag <- list()
-  class(tag) <- "shiny.tag"
-  tag$name <- `_tag_name`
-  tag$attribs <- list()
-  tag$children <- list()
-  
-  # process 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))
-  
-  if (length(varArgsNames) > 0) {
-    for (i in 1:length(varArgsNames)) {
-      # save name and value
-      name <- varArgsNames[[i]]
-      value <- varArgs[[i]]
-      
-      # process attribs
-      if (nzchar(name))
-        tag$attribs[[name]] <- value
-      
-      # process child tags
-      else if (isTag(value)) {
-        tag$children[[length(tag$children)+1]] <- value
-      }
-      
-      # recursively process lists of children
-      else if (is.list(value)) {
-        
-        tagAppendChildren <- function(tag, children) {
-          for(child in children) {
-            if (isTag(child))
-              tag <- tagAppendChild(tag, child)
-            else if (is.list(child))
-              tag <- tagAppendChildren(tag, child)
-            else if (is.character(child))
-              tag <- tagAppendChild(tag, child)
-            else
-              tag <- tagAppendChild(tag, as.character(child))
-          }
-          return (tag)
-        }
-        
-        tag <- tagAppendChildren(tag, value)
-      }
-      
-      # add text
-      else if (is.character(value)) {
-        tag <- tagAppendChild(tag, value)
-      }
-      
-      # everything else treated as text
-      else {
-        tag <- tagAppendChild(tag, as.character(value))
-      }
-    }
-  }
-  
-  # return the tag
-  return (tag)
+
+  # 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, context = NULL, eol = "\n") {
-  
+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)) {
-    sapply(tag, function(t) tagWrite(t, textWriter, indent, context))
+    tag <- dropNullsOrEmpty(flattenTags(tag))
+    lapply(tag, tagWrite, textWriter, indent)
     return (NULL)
   }
-  
-  # first call optional filter -- exit function if it returns false
-  if (!is.null(context) && !is.null(context$filter) && !context$filter(tag))
-    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(tag$attribs)) {
-    attribValue <- tag$attribs[[attrib]]
+  for (attrib in names(attribs)) {
+    attribValue <- attribs[[attrib]]
     if (!is.na(attribValue)) {
       if (is.logical(attribValue))
         attribValue <- tolower(attribValue)
-      text <- htmlEscape(attribValue, attribute=TRUE) 
+      text <- htmlEscape(attribValue, attribute=TRUE)
       textWriter(paste(" ", attrib,"=\"", text, "\"", sep=""))
     }
     else {
       textWriter(paste(" ", attrib, sep=""))
     }
   }
-  
+
   # write any children
-  if (length(tag$children) > 0) {
+  children <- dropNullsOrEmpty(flattenTags(tag$children))
+  if (length(children) > 0) {
     textWriter(">")
-    
+
     # special case for a single child text node (skip newlines and indentation)
-    if ((length(tag$children) == 1) && is.character(tag$children[[1]]) ) {
-      tagWrite(tag$children[[1]], textWriter, 0, context, "")
-      textWriter(paste("</", tag$name, ">", eol, sep=""))
+    if ((length(children) == 1) && is.character(children[[1]]) ) {
+      textWriter(paste(normalizeText(children[[1]]), "</", tag$name, ">", eol,
+        sep=""))
     }
     else {
       textWriter("\n")
-      for (child in tag$children)
-        tagWrite(child, textWriter, indent+1, context)
+      for (child in children)
+        tagWrite(child, textWriter, nextIndent)
       textWriter(paste(indentText, "</", tag$name, ">", eol, sep=""))
     }
   }
   else {
-    # only self-close void elements 
+    # only self-close void elements
     # (see: http://dev.w3.org/html5/spec/single-page.html#void-elements)
-    if (tag$name %in% c("area", "base", "br", "col", "command", "embed", "hr", 
+    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=""))
@@ -228,141 +261,356 @@ tagWrite <- function(tag, textWriter, indent=0, context = NULL, eol = "\n") {
   }
 }
 
+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")))
+}
 
-# environment used to store all available tags
-#' @export
-tags <- new.env()
-tags$a <- function(...) tag("a", list(...))
-tags$abbr <- function(...) tag("abbr", list(...))
-tags$address <- function(...) tag("address", list(...))
-tags$area <- function(...) tag("area", list(...))
-tags$article <- function(...) tag("article", list(...))
-tags$aside <- function(...) tag("aside", list(...))
-tags$audio <- function(...) tag("audio", list(...))
-tags$b <- function(...) tag("b", list(...))
-tags$base <- function(...) tag("base", list(...))
-tags$bdi <- function(...) tag("bdi", list(...))
-tags$bdo <- function(...) tag("bdo", list(...))
-tags$blockquote <- function(...) tag("blockquote", list(...))
-tags$body <- function(...) tag("body", list(...))
-tags$br <- function(...) tag("br", list(...))
-tags$button <- function(...) tag("button", list(...))
-tags$canvas <- function(...) tag("canvas", list(...))
-tags$caption <- function(...) tag("caption", list(...))
-tags$cite <- function(...) tag("cite", list(...))
-tags$code <- function(...) tag("code", list(...))
-tags$col <- function(...) tag("col", list(...))
-tags$colgroup <- function(...) tag("colgroup", list(...))
-tags$command <- function(...) tag("command", list(...))
-tags$data <- function(...) tag("data", list(...))
-tags$datalist <- function(...) tag("datalist", list(...))
-tags$dd <- function(...) tag("dd", list(...))
-tags$del <- function(...) tag("del", list(...))
-tags$details <- function(...) tag("details", list(...))
-tags$dfn <- function(...) tag("dfn", list(...))
-tags$div <- function(...) tag("div", list(...))
-tags$dl <- function(...) tag("dl", list(...))
-tags$dt <- function(...) tag("dt", list(...))
-tags$em <- function(...) tag("em", list(...))
-tags$embed <- function(...) tag("embed", list(...))
-tags$eventsource <- function(...) tag("eventsource", list(...))
-tags$fieldset <- function(...) tag("fieldset", list(...))
-tags$figcaption <- function(...) tag("figcaption", list(...))
-tags$figure <- function(...) tag("figure", list(...))
-tags$footer <- function(...) tag("footer", list(...))
-tags$form <- function(...) tag("form", list(...))
-tags$h1 <- function(...) tag("h1", list(...))
-tags$h2 <- function(...) tag("h2", list(...))
-tags$h3 <- function(...) tag("h3", list(...))
-tags$h4 <- function(...) tag("h4", list(...))
-tags$h5 <- function(...) tag("h5", list(...))
-tags$h6 <- function(...) tag("h6", list(...))
-tags$head <- function(...) tag("head", list(...))
-tags$header <- function(...) tag("header", list(...))
-tags$hgroup <- function(...) tag("hgroup", list(...))
-tags$hr <- function(...) tag("hr", list(...))
-tags$html <- function(...) tag("html", list(...))
-tags$i <- function(...) tag("i", list(...))
-tags$iframe <- function(...) tag("iframe", list(...))
-tags$img <- function(...) tag("img", list(...))
-tags$input <- function(...) tag("input", list(...))
-tags$ins <- function(...) tag("ins", list(...))
-tags$kbd <- function(...) tag("kbd", list(...))
-tags$keygen <- function(...) tag("keygen", list(...))
-tags$label <- function(...) tag("label", list(...))
-tags$legend <- function(...) tag("legend", list(...))
-tags$li <- function(...) tag("li", list(...))
-tags$link <- function(...) tag("link", list(...))
-tags$mark <- function(...) tag("mark", list(...))
-tags$map <- function(...) tag("map", list(...))
-tags$menu <- function(...) tag("menu", list(...))
-tags$meta <- function(...) tag("meta", list(...))
-tags$meter <- function(...) tag("meter", list(...))
-tags$nav <- function(...) tag("nav", list(...))
-tags$noscript <- function(...) tag("noscript", list(...))
-tags$object <- function(...) tag("object", list(...))
-tags$ol <- function(...) tag("ol", list(...))
-tags$optgroup <- function(...) tag("optgroup", list(...))
-tags$option <- function(...) tag("option", list(...))
-tags$output <- function(...) tag("output", list(...))
-tags$p <- function(...) tag("p", list(...))
-tags$param <- function(...) tag("param", list(...))
-tags$pre <- function(...) tag("pre", list(...))
-tags$progress <- function(...) tag("progress", list(...))
-tags$q <- function(...) tag("q", list(...))
-tags$ruby <- function(...) tag("ruby", list(...))
-tags$rp <- function(...) tag("rp", list(...))
-tags$rt <- function(...) tag("rt", list(...))
-tags$s <- function(...) tag("s", list(...))
-tags$samp <- function(...) tag("samp", list(...))
-tags$script <- function(...) tag("script", list(...))
-tags$section <- function(...) tag("section", list(...))
-tags$select <- function(...) tag("select", list(...))
-tags$small <- function(...) tag("small", list(...))
-tags$source <- function(...) tag("source", list(...))
-tags$span <- function(...) tag("span", list(...))
-tags$strong <- function(...) tag("strong", list(...))
-tags$style <- function(...) tag("style", list(...))
-tags$sub <- function(...) tag("sub", list(...))
-tags$summary <- function(...) tag("summary", list(...))
-tags$sup <- function(...) tag("sup", list(...))
-tags$table <- function(...) tag("table", list(...))
-tags$tbody <- function(...) tag("tbody", list(...))
-tags$td <- function(...) tag("td", list(...))
-tags$textarea <- function(...) tag("textarea", list(...))
-tags$tfoot <- function(...) tag("tfoot", list(...))
-tags$th <- function(...) tag("th", list(...))
-tags$thead <- function(...) tag("thead", list(...))
-tags$time <- function(...) tag("time", list(...))
-tags$title <- function(...) tag("title", list(...))
-tags$tr <- function(...) tag("tr", list(...))
-tags$track <- function(...) tag("track", list(...))
-tags$u <- function(...) tag("u", list(...))
-tags$ul <- function(...) tag("ul", list(...))
-tags$var <- function(...) tag("var", list(...))
-tags$video <- function(...) tag("video", list(...))
-tags$wbr <- function(...) tag("wbr", list(...))
+renderTags <- function(ui, singletons = character(0), indent = 0) {
+  # Do singleton and head processing before rendering
+  singletonInfo <- takeSingletons(ui, singletons)
+  headInfo <- takeHeads(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,
+              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$children)
+      return(NULL)
+    }
+    return(uiObj)
+  }, FALSE)
+
+  return(list(ui=result, head=headItems))
+}
+
+#' HTML Builder Functions
+#'
+#' Simple functions for constructing HTML documents.
+#'
+#' The \code{tags} environment contains convenience functions for all valid
+#' HTML5 tags. To generate tags that are not part of the HTML5 specification,
+#' you can use the \code{\link{tag}()} function.
+#'
+#' Dedicated functions are available for the most common HTML tags that do not
+#' conflict with common R functions.
+#'
+#' The result from these functions is a tag object, which can be converted using
+#' \code{\link{as.character}()}.
+#'
+#' @name builder
+#' @param ... Attributes and children of the element. Named arguments become
+#'   attributes, and positional arguments become children. Valid children are
+#'   tags, single-character character vectors (which become text nodes), and raw
+#'   HTML (see \code{\link{HTML}}). You can also pass lists that contain tags,
+#'   text nodes, and HTML.
+#' @export tags
+#' @examples
+#' doc <- tags$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 {
+    # 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/timer.R

@@ -23,17 +23,17 @@ TimerCallbacks <- setRefClass(
     schedule = function(millis, func) {
       id <- .nextId
       .nextId <<- .nextId + 1L
-      
+
       t <- now()
-      
+
       # TODO: Horribly inefficient, use a heap instead
       .times <<- rbind(.times, data.frame(time=t+millis,
                                           scheduled=t,
                                           id=id))
       .times <<- .times[order(.times$time),]
-      
+
       .funcs$set(as.character(id), func)
-      
+
       return(id)
     },
     timeToNextEvent = function() {
@@ -46,18 +46,18 @@ TimerCallbacks <- setRefClass(
       elapsed <- .times$time < now()
       result <- .times[elapsed,]
       .times <<- .times[!elapsed,]
-      
+
       # TODO: Examine scheduled column to check if any funny business
       #       has occurred with the system clock (e.g. if scheduled
       #       is later than now())
-      
+
       return(result)
     },
     executeElapsed = function() {
       elapsed <- takeElapsed()
       if (length(elapsed) == 0)
         return(FALSE)
-      
+
       for (id in elapsed$id) {
         thisFunc <- .funcs$remove(as.character(id))
         # TODO: Catch exception, and...?

R/update-input.R

@@ -0,0 +1,394 @@
+#' Change the value of a text input on the client
+#'
+#' @template update-input
+#' @param value The value to set for the input object.
+#'
+#' @seealso \code{\link{textInput}}
+#'
+#' @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
+#'
+#'     # This will change the value of input$inText, based on x
+#'     updateTextInput(session, "inText", value = paste("New text", x))
+#'
+#'     # Can also set the label, this time for input$inText2
+#'     updateTextInput(session, "inText2",
+#'       label = paste("New label", x),
+#'       value = paste("New text", x))
+#'   })
+#' })
+#' }
+#' @export
+updateTextInput <- function(session, inputId, label = NULL, value = NULL) {
+  message <- dropNulls(list(label=label, value=value))
+  session$sendInputMessage(inputId, message)
+}
+
+
+#' Change the value of a checkbox input on the client
+#'
+#' @template update-input
+#' @param value The value to set for the input object.
+#'
+#' @seealso \code{\link{checkboxInput}}
+#'
+#' @examples
+#' \dontrun{
+#' shinyServer(function(input, output, session) {
+#'
+#'   observe({
+#'     # TRUE if input$controller is even, FALSE otherwise.
+#'     x_even <- input$controller %% 2 == 0
+#'
+#'     updateCheckboxInput(session, "inCheckbox", value = x_even)
+#'   })
+#' })
+#' }
+#' @export
+updateCheckboxInput <- updateTextInput
+
+
+#' Change the value of a slider input on the client
+#'
+#' @template update-input
+#' @param value The value to set for the input object.
+#'
+#' @seealso \code{\link{sliderInput}}
+#'
+#' @examples
+#' \dontrun{
+#' shinyServer(function(input, output, session) {
+#'
+#'   observe({
+#'     # We'll use the input$controller variable multiple times, so save it as x
+#'     # for convenience.
+#'     x <- input$controller
+#'
+#'     # Similar to number and text. only label and value can be set for slider
+#'     updateSliderInput(session, "inSlider",
+#'       label = paste("Slider label", x),
+#'       value = x)
+#'
+#'     # For sliders that pick out a range, pass in a vector of 2 values.
+#'     updateSliderInput(session, "inSlider2", value = c(x-1, x+1))
+#'
+#'     # An NA means to not change that value (the low or high one)
+#'     updateSliderInput(session, "inSlider3", value = c(NA, x+2))
+#'   })
+#' })
+#' }
+#' @export
+updateSliderInput <- updateTextInput
+
+#' Change the value of a date input on the client
+#'
+#' @template update-input
+#' @param value The desired date value. Either a Date object, or a string in
+#'   \code{yyyy-mm-dd} format.
+#' @param min The minimum allowed date. Either a Date object, or a string in
+#'   \code{yyyy-mm-dd} format.
+#' @param max The maximum allowed date. Either a Date object, or a string in
+#'   \code{yyyy-mm-dd} format.
+#'
+#' @seealso \code{\link{dateInput}}
+#'
+#' @examples
+#' \dontrun{
+#' shinyServer(function(input, output, session) {
+#'
+#'   observe({
+#'     # We'll use the input$controller variable multiple times, so save it as x
+#'     # for convenience.
+#'     x <- input$controller
+#'
+#'     updateDateInput(session, "inDate",
+#'       label = paste("Date label", x),
+#'       value = paste("2013-04-", x, sep=""),
+#'       min   = paste("2013-04-", x-1, sep=""),
+#'       max   = paste("2013-04-", x+1, sep="")
+#'     )
+#'   })
+#' })
+#' }
+#' @export
+updateDateInput <- function(session, inputId, label = NULL, value = NULL,
+    min = NULL, max = NULL) {
+
+  # If value is a date object, convert it to a string with yyyy-mm-dd format
+  # Same for min and max
+  if (inherits(value, "Date"))  value <- format(value, "%Y-%m-%d")
+  if (inherits(min, "Date"))    min   <- format(min,   "%Y-%m-%d")
+  if (inherits(max, "Date"))    max   <- format(max,   "%Y-%m-%d")
+
+  message <- dropNulls(list(label=label, value=value, min=min, max=max))
+  session$sendInputMessage(inputId, message)
+}
+
+
+#' Change the start and end values of a date range input on the client
+#'
+#' @template update-input
+#' @param start The start date. Either a Date object, or a string in
+#'   \code{yyyy-mm-dd} format.
+#' @param end The end date. Either a Date object, or a string in
+#'   \code{yyyy-mm-dd} format.
+#' @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.
+#'
+#' @seealso \code{\link{dateRangeInput}}
+#'
+#' @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
+#'
+#'     updateDateRangeInput(session, "inDateRange",
+#'       label = paste("Date range label", x),
+#'       start = paste("2013-01-", x, sep=""))
+#'       end = paste("2013-12-", x, sep=""))
+#'   })
+#' })
+#' }
+#' @export
+updateDateRangeInput <- function(session, inputId, label = 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')
+  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')
+
+  message <- dropNulls(list(
+    label = label,
+    value = c(start, end),
+    min = min,
+    max = max
+  ))
+
+  session$sendInputMessage(inputId, message)
+}
+
+#' Change the selected tab on the client
+#'
+#' @param session The \code{session} object passed to function given to
+#'   \code{shinyServer}.
+#' @param inputId The id of the \code{tabsetPanel}, \code{navlistPanel},
+#' or \code{navbarPage} object.
+#' @param selected The name of the tab to make active.
+#'
+#' @seealso \code{\link{tabsetPanel}}, \code{\link{navlistPanel}},
+#' \code{\link{navbarPage}}
+#'
+#' @examples
+#' \dontrun{
+#' shinyServer(function(input, output, session) {
+#'
+#'   observe({
+#'     # TRUE if input$controller is even, FALSE otherwise.
+#'     x_even <- input$controller %% 2 == 0
+#'
+#'     # Change the selected tab.
+#'     # Note that the tabset container must have been created with an 'id' argument
+#'     if (x_even) {
+#'       updateTabsetPanel(session, "inTabset", selected = "panel2")
+#'     } else {
+#'       updateTabsetPanel(session, "inTabset", selected = "panel1")
+#'     }
+#'   })
+#' })
+#' }
+#' @export
+updateTabsetPanel <- function(session, inputId, selected = NULL) {
+  message <- dropNulls(list(value = selected))
+  session$sendInputMessage(inputId, message)
+}
+
+
+#' Change the value of a number 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{numericInput}}
+#'
+#' @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
+#'
+#'     updateNumericInput(session, "inNumber", value = x)
+#'
+#'     updateNumericInput(session, "inNumber2",
+#'       label = paste("Number label ", x),
+#'       value = x, min = x-10, max = x+10, step = 5)
+#'   })
+#' })
+#' }
+#' @export
+updateNumericInput <- function(session, inputId, label = NULL, value = NULL,
+    min = NULL, max = NULL, step = NULL) {
+
+  message <- dropNulls(list(
+    label = label, value = formatNoSci(value),
+    min = formatNoSci(min), max = formatNoSci(max), step = formatNoSci(step)
+  ))
+  session$sendInputMessage(inputId, message)
+}
+
+
+#' Change the value of a checkbox group input on the client
+#'
+#' @template update-input
+#' @param choices A named vector or named list of options. For each item, the
+#'   name will be used as the label, and the value will be used as the value.
+#' @param selected A vector or list of options (values) which will be selected.
+#'
+#' @seealso \code{\link{checkboxGroupInput}}
+#'
+#' @examples
+#' \dontrun{
+#' shinyServer(function(input, output, session) {
+#'
+#'   observe({
+#'     # We'll use the input$controller variable multiple times, so save it as x
+#'     # for convenience.
+#'     x <- input$controller
+#'
+#'     # Create a list of new options, where the name of the items is something
+#'     # like 'option label x 1', and the values are 'option-x-1'.
+#'     cb_options <- list()
+#'     cb_options[[sprintf("option label %d 1", x)]] <- sprintf("option-%d-1", x)
+#'     cb_options[[sprintf("option label %d 2", x)]] <- sprintf("option-%d-2", x)
+#'
+#'     # Change values for input$inCheckboxGroup
+#'     updateCheckboxGroupInput(session, "inCheckboxGroup", choices = cb_options)
+#'
+#'     # Can also set the label and select items
+#'     updateCheckboxGroupInput(session, "inCheckboxGroup2",
+#'       label = paste("checkboxgroup label", x),
+#'       choices = cb_options,
+#'       selected = sprintf("option-%d-2", x)
+#'     )
+#'   })
+#' })
+#' }
+#' @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)) mapply(choices, names(choices),
+    SIMPLIFY = FALSE, USE.NAMES = FALSE,
+    FUN = function(value, name) {
+      list(value = value,
+           label = name)
+    }
+  )
+
+  message <- dropNulls(list(label = label, options = options, value = selected))
+
+  session$sendInputMessage(inputId, message)
+}
+
+
+#' Change the value of a radio input on the client
+#'
+#' @template update-input
+#' @param choices A named vector or named list of options. For each item, the
+#'   name will be used as the label, and the value will be used as the value.
+#' @param selected A vector or list of options (values) which will be selected.
+#'
+#' @seealso \code{\link{radioButtons}}
+#'
+#' @examples
+#' \dontrun{
+#' shinyServer(function(input, output, session) {
+#'
+#'   observe({
+#'     # We'll use the input$controller variable multiple times, so save it as x
+#'     # for convenience.
+#'     x <- input$controller
+#'
+#'     r_options <- list()
+#'     r_options[[sprintf("option label %d 1", x)]] <- sprintf("option-%d-1", x)
+#'     r_options[[sprintf("option label %d 2", x)]] <- sprintf("option-%d-2", x)
+#'
+#'     # Change values for input$inRadio
+#'     updateRadioButtons(session, "inRadio", choices = r_options)
+#'
+#'     # Can also set the label and select an item
+#'     updateRadioButtons(session, "inRadio2",
+#'       label = paste("Radio label", x),
+#'       choices = r_options,
+#'       selected = sprintf("option-%d-2", x)
+#'     )
+#'   })
+#' })
+#' }
+#' @export
+updateRadioButtons <- updateCheckboxGroupInput
+
+
+#' 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.
+#'
+#' @seealso \code{\link{selectInput}}
+#'
+#' @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
+#'
+#'     # Create a list of new options, where the name of the items is something
+#'     # like 'option label x 1', and the values are 'option-x-1'.
+#'     s_options <- list()
+#'     s_options[[sprintf("option label %d 1", x)]] <- sprintf("option-%d-1", x)
+#'     s_options[[sprintf("option label %d 2", x)]] <- sprintf("option-%d-2", x)
+#'
+#'     # Change values for input$inSelect
+#'     updateSelectInput(session, "inSelect", choices = s_options)
+#'
+#'     # Can also set the label and select an item (or more than one if it's a
+#'     # multi-select)
+#'     updateSelectInput(session, "inSelect2",
+#'       label = paste("Select label", x),
+#'       choices = s_options,
+#'       selected = sprintf("option-%d-2", x)
+#'     )
+#'   })
+#' })
+#' }
+#' @export
+updateSelectInput <- updateCheckboxGroupInput

R/utils.R

@@ -1,13 +1,13 @@
 #' Make a random number generator repeatable
-#' 
-#' Given a function that generates random data, returns a wrapped version of 
+#'
+#' Given a function that generates random data, returns a wrapped version of
 #' that function that always uses the same seed when called. The seed to use can
 #' be passed in explicitly if desired; otherwise, a random number is used.
-#' 
+#'
 #' @param rngfunc The function that is affected by the R session's seed.
 #' @param seed The seed to set every time the resulting function is called.
 #' @return A repeatable version of the function that was passed in.
-#'   
+#'
 #' @note When called, the returned function attempts to preserve the R session's
 #'   current seed by snapshotting and restoring
 #'   \code{\link[base]{.Random.seed}}.
@@ -19,11 +19,11 @@
 #' rnormA(3)  # [1]  1.8285879 -0.7468041 -0.4639111
 #' rnormA(5)  # [1]  1.8285879 -0.7468041 -0.4639111 -1.6510126 -1.4686924
 #' rnormB(5)  # [1] -0.7946034  0.2568374 -0.6567597  1.2451387 -0.8375699
-#' 
+#'
 #' @export
 repeatable <- function(rngfunc, seed = runif(1, 0, .Machine$integer.max)) {
   force(seed)
-  
+
   function(...) {
     # When we exit, restore the seed to its original state
     if (exists('.Random.seed', where=globalenv())) {
@@ -33,10 +33,10 @@ repeatable <- function(rngfunc, seed = runif(1, 0, .Machine$integer.max)) {
     else {
       on.exit(rm('.Random.seed', pos=globalenv()))
     }
-    
+
     set.seed(seed)
-    
-    do.call(rngfunc, list(...))
+
+    rngfunc(...)
   }
 }
 
@@ -55,6 +55,19 @@ repeatable <- function(rngfunc, seed = runif(1, 0, .Machine$integer.max)) {
   paste(x, y, sep='')
 }
 
+# Given a vector or list, drop all the NULL items in it
+dropNulls <- function(x) {
+  x[!vapply(x, is.null, FUN.VALUE=logical(1))]
+}
+
+nullOrEmpty <- function(x) {
+  is.null(x) || length(x) == 0
+}
+# Given a vector or list, drop all the NULL items in it
+dropNullsOrEmpty <- function(x) {
+  x[!vapply(x, nullOrEmpty, FUN.VALUE=logical(1))]
+}
+
 knownContentTypes <- Map$new()
 knownContentTypes$mset(
   html='text/html; charset=UTF-8',
@@ -110,14 +123,14 @@ makeFunction <- function(args = pairlist(), body, env = parent.frame()) {
   eval(call("function", args, body), env)
 }
 
-#' Convert an expression or quoted expression to a function
+#' Convert an expression to a function
 #'
 #' This is to be called from another function, because it will attempt to get
 #' an unquoted expression from two calls back.
 #'
 #' If expr is a quoted expression, then this just converts it to a function.
 #' If expr is a function, then this simply returns expr (and prints a
-#'   deprecation message.
+#'   deprecation message).
 #' If expr was a non-quoted expression from two calls back, then this will
 #'   quote the original expression and convert it to a function.
 #
@@ -125,6 +138,8 @@ makeFunction <- function(args = pairlist(), body, env = parent.frame()) {
 #' @param env The desired environment for the function. Defaults to the
 #'   calling environment two steps back.
 #' @param quoted Is the expression quoted?
+#' @param caller_offset If specified, the offset in the callstack of the
+#'   functiont to be treated as the caller.
 #'
 #' @examples
 #' # Example of a new renderer, similar to renderText
@@ -160,18 +175,19 @@ makeFunction <- function(args = pairlist(), body, env = parent.frame()) {
 #' # "text, text, text"
 #'
 #' @export
-exprToFunction <- function(expr, env=parent.frame(2), quoted=FALSE) {
+exprToFunction <- function(expr, env=parent.frame(2), quoted=FALSE,
+                           caller_offset=1) {
   # Get the quoted expr from two calls back
-  expr_sub <- eval(substitute(substitute(expr)), parent.frame())
+  expr_sub <- eval(substitute(substitute(expr)), parent.frame(caller_offset))
 
   # Check if expr is a function, making sure not to evaluate expr, in case it
   # is actually an unquoted expression.
   # If expr is a single token, then indexing with [[ will error; if it has multiple
   # tokens, then [[ works. In the former case it will be a name object; in the
   # latter, it will be a language object.
-  if (!is.name(expr_sub) && expr_sub[[1]] == as.name('function')) {
+  if (!is.null(expr_sub) && !is.name(expr_sub) && expr_sub[[1]] == as.name('function')) {
     # Get name of function that called this function
-    called_fun <- sys.call(-1)[[1]]
+    called_fun <- sys.call(-1 * caller_offset)[[1]]
 
     shinyDeprecated(msg = paste("Passing functions to '", called_fun,
       "' is deprecated. Please use expressions instead. See ?", called_fun,
@@ -188,6 +204,103 @@ exprToFunction <- function(expr, env=parent.frame(2), quoted=FALSE) {
   }
 }
 
+#' Install an expression as a function
+#'
+#' Installs an expression in the given environment as a function, and registers
+#' debug hooks so that breakpoints may be set in the function.
+#'
+#' This function can replace \code{exprToFunction} as follows: we may use
+#' \code{func <- exprToFunction(expr)} if we do not want the debug hooks, or
+#' \code{installExprFunction(expr, "func")} if we do. Both approaches create a
+#' function named \code{func} in the current environment.
+#'
+#' @seealso Wraps \code{\link{exprToFunction}}; see that method's documentation
+#'   for more documentation and examples.
+#'
+#' @param expr A quoted or unquoted expression
+#' @param name The name the function should be given
+#' @param eval.env The desired environment for the function. Defaults to the
+#'   calling environment two steps back.
+#' @param quoted Is the expression quoted?
+#' @param assign.env The environment in which the function should be assigned.
+#' @param label A label for the object to be shown in the debugger. Defaults to
+#'   the name of the calling function.
+#'
+#' @export
+installExprFunction <- function(expr, name, eval.env = parent.frame(2),
+                                quoted = FALSE,
+                                assign.env = parent.frame(1),
+                                label = as.character(sys.call(-1)[[1]])) {
+  func <- exprToFunction(expr, eval.env, quoted, 2)
+  assign(name, func, envir = assign.env)
+  registerDebugHook(name, assign.env, label)
+}
+
+#' Parse a GET query string from a URL
+#'
+#' Returns a named character vector of key-value pairs.
+#'
+#' @param str The query string. It can have a leading \code{"?"} or not.
+#' @export
+#' @examples
+#' parseQueryString("?foo=1&bar=b%20a%20r")
+#'
+#' \dontrun{
+#' # Example of usage within a Shiny app
+#' shinyServer(function(input, output, clientData) {
+#'
+#'   output$queryText <- renderText({
+#'     query <- parseQueryString(clientData$url_search)
+#'
+#'     # Ways of accessing the values
+#'     if (as.numeric(query$foo) == 1) {
+#'       # Do something
+#'     }
+#'     if (query[["bar"]] == "targetstring") {
+#'       # Do something else
+#'     }
+#'
+#'     # Return a string with key-value pairs
+#'     paste(names(query), query, sep = "=", collapse=", ")
+#'   })
+#' })
+#' }
+#'
+parseQueryString <- function(str) {
+  if (is.null(str) || nchar(str) == 0)
+    return(list())
+
+  # Remove leading ?
+  if (substr(str, 1, 1) == '?')
+    str <- substr(str, 2, nchar(str))
+
+  pairs <- strsplit(str, '&', fixed = TRUE)[[1]]
+  pairs <- strsplit(pairs, '=', fixed = TRUE)
+
+  keys   <- vapply(pairs, function(x) x[1], FUN.VALUE = character(1))
+  values <- vapply(pairs, function(x) x[2], FUN.VALUE = character(1))
+  # Replace NA with '', so they don't get converted to 'NA' by URLdecode
+  values[is.na(values)] <- ''
+
+  # Convert "+" to " ", since URLdecode doesn't do it
+  keys   <- gsub('+', ' ', keys,   fixed = TRUE)
+  values <- gsub('+', ' ', values, fixed = TRUE)
+
+  keys   <- vapply(keys,   function(x) URLdecode(x), FUN.VALUE = character(1))
+  values <- vapply(values, function(x) URLdecode(x), FUN.VALUE = character(1))
+
+  setNames(as.list(values), keys)
+}
+
+# decide what to do in case of errors; it is customizable using the shiny.error
+# option (e.g. we can set options(shiny.error = recover))
+shinyCallingHandlers <- function(expr) {
+  withCallingHandlers(expr, error = function(e) {
+    handle <- getOption('shiny.error')
+    if (is.function(handle)) handle()
+  })
+}
+
 #' Print message for deprecated functions in Shiny
 #'
 #' To disable these messages, use \code{options(shiny.deprecation.messages=FALSE)}.
@@ -210,3 +323,210 @@ shinyDeprecated <- function(new=NULL, msg=NULL,
   # Similar to .Deprecated(), but print a message instead of warning
   message(msg)
 }
+
+#' Register a function with the debugger (if one is active).
+#'
+#' Call this function after exprToFunction to give any active debugger a hook
+#' to set and clear breakpoints in the function. A debugger may implement
+#' registerShinyDebugHook to receive callbacks when Shiny functions are
+#' instantiated at runtime.
+#'
+#' @param name Name of the field or object containing the function.
+#' @param where The reference object or environment containing the function.
+#' @param label A label to display on the function in the debugger.
+#' @noRd
+registerDebugHook <- function(name, where, label) {
+  if (exists("registerShinyDebugHook", mode = "function")) {
+    registerShinyDebugHook <- get("registerShinyDebugHook", mode = "function")
+    params <- new.env(parent = emptyenv())
+    params$name <- name
+    params$where <- where
+    params$label <- label
+    registerShinyDebugHook(params)
+  }
+}
+
+Callbacks <- setRefClass(
+  'Callbacks',
+  fields = list(
+    .nextId = 'integer',
+    .callbacks = 'Map'
+  ),
+  methods = list(
+    initialize = function() {
+      .nextId <<- as.integer(.Machine$integer.max)
+    },
+    register = function(callback) {
+      id <- as.character(.nextId)
+      .nextId <<- .nextId - 1L
+      .callbacks$set(id, callback)
+      return(function() {
+        .callbacks$remove(id)
+      })
+    },
+    invoke = function(..., onError=NULL) {
+      for (callback in .callbacks$values()) {
+        if (is.null(onError)) {
+          callback(...)
+        } else {
+          tryCatch(callback(...), error = onError)
+        }
+      }
+    },
+    count = function() {
+      .callbacks$size()
+    }
+  )
+)
+
+# convert a data frame to JSON as required by DataTables request
+dataTablesJSON <- function(data, query) {
+  n <- nrow(data)
+  with(parseQueryString(query), {
+    useRegex <- function(j, envir = parent.frame()) {
+      # FIXME: bRegex is not part of the query string yet (DataTables 1.9.4)
+      return(TRUE)
+      ex <- getExists(
+        if (missing(j)) 'bRegex' else sprintf('bRegex_%s', j), 'character', envir
+      )
+      is.null(ex) || ex == 'true'
+    }
+    # global searching
+    i <- seq_len(n)
+    sSearch <- getExists('sSearch', 'character')
+    if (length(sSearch) && nzchar(sSearch)) {
+      bRegex <- useRegex()
+      i0 <- apply(data, 2, function(x) grep(sSearch, as.character(x), fixed = !bRegex))
+      i <- intersect(i, unique(unlist(i0)))
+    }
+    # search by columns
+    if (length(i)) for (j in seq_len(as.integer(iColumns)) - 1) {
+      if (is.null(s <- getExists(sprintf('bSearchable_%d', j), 'character')) ||
+            s == "0" || s == "false") next  # the j-th column is not searchable
+      if (is.null(k <- getExists(sprintf('sSearch_%d', j), 'character'))) next
+      if (nzchar(k)) {
+        dj <- data[, j + 1]
+        r  <- commaToRange(k)
+        ij <- if (length(r) == 2 && is.numeric(dj)) {
+          which(dj >= r[1] & dj <= r[2])
+        } else {
+          grep(k, as.character(dj), fixed = !useRegex(j))
+        }
+        i <- intersect(ij, i)
+      }
+      if (length(i) == 0) break
+    }
+    if (length(i) != n) data <- data[i, , drop = FALSE]
+    # sorting
+    oList <- list()
+    for (j in seq_len(as.integer(iSortingCols)) - 1) {
+      if (is.null(k <- getExists(sprintf('iSortCol_%d', j), 'character'))) break
+      desc <- getExists(sprintf('sSortDir_%d', j), 'character')
+      if (is.character(desc)) {
+        col <- data[, as.integer(k) + 1]
+        oList[[length(oList) + 1]] <- (if (desc == 'asc') identity else `-`)(
+          if (is.numeric(col)) col else xtfrm(col)
+        )
+      }
+    }
+    if (length(oList)) {
+      i <- do.call(order, oList)
+      data <- data[i, , drop = FALSE]
+    }
+    # paging
+    if (iDisplayLength != '-1') {
+      i <- seq(as.integer(iDisplayStart) + 1L, length.out = as.integer(iDisplayLength))
+      i <- i[i <= nrow(data)]
+      fdata <- data[i, , drop = FALSE]  # filtered data
+    } else fdata <- data
+    fdata <- unname(as.matrix(fdata))
+    if (nrow(fdata) == 0) fdata <- list()
+
+    toJSON(list(
+      sEcho = as.integer(sEcho),
+      iTotalRecords = n,
+      iTotalDisplayRecords = nrow(data),
+      aaData = fdata
+    ))
+  })
+}
+
+getExists <- function(x, mode, envir = parent.frame()) {
+  if (exists(x, envir = envir, mode = mode, inherits = FALSE))
+    get(x, envir = envir, mode = mode, inherits = FALSE)
+}
+
+# convert a string of the form "lower,upper" to c(lower, upper)
+commaToRange <- function(string) {
+  if (!grepl(',', string)) return()
+  r <- strsplit(string, ',')[[1]]
+  if (length(r) > 2) return()
+  if (length(r) == 1) r <- c(r, '')  # lower,
+  r <- as.numeric(r)
+  if (is.na(r[1])) r[1] <- -Inf
+  if (is.na(r[2])) r[2] <- Inf
+  r
+}
+
+# for options passed to DataTables/Selectize/..., the options of the class AsIs
+# will be evaluated as literal JavaScript code
+checkAsIs <- function(options) {
+  evalOptions <- if (length(options)) {
+    nms <- names(options)
+    i <- unlist(lapply(options, function(x) {
+      is.character(x) && inherits(x, 'AsIs')
+    }))
+    if (any(i)) {
+      # must convert to character, otherwise toJSON() turns it to an array []
+      options[i] <- lapply(options[i], paste, collapse = '\n')
+      nms[i]  # options of these names will be evaluated in JS
+    }
+  }
+  list(options = options, eval = evalOptions)
+}
+
+srcrefFromShinyCall <- function(expr) {
+  srcrefs <- attr(expr, "srcref")
+  num_exprs <- length(srcrefs)
+  c(srcrefs[[1]][1], srcrefs[[1]][2],
+    srcrefs[[num_exprs]][3], srcrefs[[num_exprs]][4],
+    srcrefs[[1]][5], srcrefs[[num_exprs]][6])
+}
+
+# Indicates whether the given querystring should cause the associated request
+# to be handled in showcase mode. Returns the showcase mode if set, or NULL
+# if no showcase mode is set.
+showcaseModeOfQuerystring <- function(querystring) {
+  if (nchar(querystring) > 0) {
+    qs <- parseQueryString(querystring)
+    if (exists("showcase", where = qs)) {
+      return(as.numeric(qs$showcase))
+    }
+  }
+  return(NULL)
+}
+
+showcaseModeOfReq <- function(req) {
+  showcaseModeOfQuerystring(req$QUERY_STRING)
+}
+
+# Returns (just) the filename containing the given source reference, or an
+# empty string if the source reference doesn't include file information.
+srcFileOfRef <- function(srcref) {
+  fileEnv <- attr(srcref, "srcfile")
+  # The 'srcfile' attribute should be a non-null environment containing the
+  # variable 'filename', which gives the full path to the source file.
+  if (!is.null(fileEnv) &&
+      is.environment(fileEnv) &&
+      exists("filename", where = fileEnv))
+    basename(fileEnv[["filename"]])
+  else
+    ""
+}
+
+# Format a number without sci notation, and keep as many digits as possible (do
+# we really need to go beyond 15 digits?)
+formatNoSci <- function(x) {
+  if (is.null(x)) return(NULL)
+  format(x, scientific = FALSE, digits = 15)
+}

README.md

@@ -1,4 +1,6 @@
-# Shiny 
+# Shiny
+
+[![Build Status](https://travis-ci.org/rstudio/shiny.png)](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.
 
@@ -10,26 +12,34 @@ For an introduction and examples, visit the [Shiny homepage](http://www.rstudio.
 * 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.)
-* Attractive default UI theme based on [Twitter Bootstrap](http://twitter.github.com/bootstrap).
+* 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.
-* Fast bidirectional communication between the web browser and R using the [websockets](http://illposed.net/websockets.html) package.
+* Fast bidirectional communication between the web browser and R using the [httpuv](https://github.com/rstudio/httpuv) package.
 * Uses a [reactive](http://en.wikipedia.org/wiki/Reactive_programming) programming model that eliminates messy event handling code, so you can focus on the code that really matters.
 * Develop and redistribute your own Shiny widgets that other developers can easily drop into their own applications (coming soon!).
 
 ## Installation
 
-From an R console:
+To install the stable version from CRAN, simply run the following from an R console:
 
 ```r
 install.packages("shiny")
 ```
 
+To install the latest development builds directly from GitHub, run this instead:
+
+```r
+if (!require("devtools"))
+  install.packages("devtools")
+devtools::install_github("shiny", "rstudio")
+```
+
 ## 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.
 
-We hope you enjoy using Shiny. As you learn more and work with the package please [let us know](https://github.com/rstudio/shiny/issues) what problems you encounter and how you'd like to see Shiny evolve.
+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).
 
 ## License
 

inst/NOTICE

@@ -4,13 +4,16 @@ 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, 
+Copyright (c) 2012 jQuery Foundation and other contributors,
 http://jquery.com/
 
 Permission is hereby granted, free of charge, to any person obtaining
@@ -33,8 +36,8 @@ 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 License
-----------------------------------------------------------------------   
+Bootstrap, bootstrap-datepicker, and selectize License
+----------------------------------------------------------------------
 
                                  Apache License
                            Version 2.0, January 2004
@@ -239,8 +242,34 @@ Bootstrap License
    limitations under the License.
 
 
+es5-shim License
+----------------------------------------------------------------------
+
+The MIT License (MIT)
+
+Copyright (C) 2009-2014 Kristopher Michael Kowal and contributors
+
+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.
+
+
 jslider License
-----------------------------------------------------------------------   
+----------------------------------------------------------------------
 
 The MIT License (MIT)
 Copyright (c) 2012 Egor Khmelev
@@ -262,3 +291,35 @@ 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
+OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN
+NO EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY DIRECT, INDIRECT,
+INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA,
+OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
+LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+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/DESCRIPTION

@@ -0,0 +1,7 @@
+Title: Hello Shiny!
+Author: RStudio, Inc.
+AuthorUrl: http://www.rstudio.com/
+License: MIT
+DisplayMode: Showcase
+Tags: getting-started
+Type: Shiny

inst/examples/01_hello/Readme.md

@@ -0,0 +1,4 @@
+This small Shiny application demonstrates Shiny's automatic UI updates. Move
+the *Number of bins* slider and notice how the `renderPlot` expression is
+automatically re-evaluated when its dependant, `input$bins`, changes,
+causing a histogram with a new number of bins to be rendered.

inst/examples/01_hello/server.R

@@ -1,20 +1,21 @@
 library(shiny)
 
-# Define server logic required to generate and plot a random distribution
+# Define server logic required to draw a histogram
 shinyServer(function(input, output) {
-   
-  # Expression that generates a plot of the distribution. The expression
-  # is wrapped in a call to renderPlot to indicate that:
+
+  # Expression that generates a histogram. The expression is
+  # wrapped in a call to renderPlot to indicate that:
   #
-  #  1) It is "reactive" and therefore should be automatically 
+  #  1) It is "reactive" and therefore should be automatically
   #     re-executed when inputs change
-  #  2) Its output type is a plot 
-  #
+  #  2) Its output type is a plot
+
   output$distPlot <- renderPlot({
-        
-    # generate an rnorm distribution and plot it
-    dist <- rnorm(input$obs)
-    hist(dist)
+    x    <- faithful[, 2]  # Old Faithful Geyser data
+    bins <- seq(min(x), max(x), length.out = input$bins + 1)
+
+    # draw the histogram with the specified number of bins
+    hist(x, breaks = bins, col = 'darkgray', border = 'white')
   })
-  
+
 })

inst/examples/01_hello/ui.R

@@ -1,22 +1,24 @@
 library(shiny)
 
-# Define UI for application that plots random distributions 
-shinyUI(pageWithSidebar(
-  
+# Define UI for application that draws a histogram
+shinyUI(fluidPage(
+
   # Application title
-  headerPanel("Hello Shiny!"),
-  
-  # Sidebar with a slider input for number of observations
-  sidebarPanel(
-    sliderInput("obs", 
-                "Number of observations:", 
-                min = 0, 
-                max = 1000, 
-                value = 500)
-  ),
-  
-  # Show a plot of the generated distribution
-  mainPanel(
-    plotOutput("distPlot")
+  titlePanel("Hello Shiny!"),
+
+  # Sidebar with a slider input for the number of bins
+  sidebarLayout(
+    sidebarPanel(
+      sliderInput("bins",
+                  "Number of bins:",
+                  min = 1,
+                  max = 50,
+                  value = 30)
+    ),
+
+    # Show a plot of the generated distribution
+    mainPanel(
+      plotOutput("distPlot")
+    )
   )
 ))

inst/examples/02_text/DESCRIPTION

@@ -0,0 +1,8 @@
+Title: Shiny Text
+Author: RStudio, Inc.
+AuthorUrl: http://www.rstudio.com/
+License: MIT
+DisplayMode: Showcase
+Tags: getting-started
+Type: Shiny
+

inst/examples/02_text/Readme.md

@@ -0,0 +1 @@
+This example demonstrates output of raw text from R using the `renderPrint` function in `server.R` and the `verbatimTextOutput` function in `ui.R`. In this case, a textual summary of the data is shown using R's built-in `summary` function. 

inst/examples/02_text/server.R

@@ -1,7 +1,8 @@
 library(shiny)
 library(datasets)
 
-# Define server logic required to summarize and view the selected dataset
+# Define server logic required to summarize and view the selected
+# dataset
 shinyServer(function(input, output) {
   
   # Return the requested dataset

inst/examples/02_text/ui.R

@@ -1,25 +1,27 @@
 library(shiny)
 
 # Define UI for dataset viewer application
-shinyUI(pageWithSidebar(
+shinyUI(fluidPage(
   
   # Application title
-  headerPanel("Shiny Text"),
+  titlePanel("Shiny Text"),
   
-  # Sidebar with controls to select a dataset and specify the number
-  # of observations to view
-  sidebarPanel(
-    selectInput("dataset", "Choose a dataset:", 
-                choices = c("rock", "pressure", "cars")),
+  # Sidebar with controls to select a dataset and specify the
+  # number of observations to view
+  sidebarLayout(
+    sidebarPanel(
+      selectInput("dataset", "Choose a dataset:", 
+                  choices = c("rock", "pressure", "cars")),
+      
+      numericInput("obs", "Number of observations to view:", 10)
+    ),
     
-    numericInput("obs", "Number of observations to view:", 10)
-  ),
-  
-  # Show a summary of the dataset and an HTML table with the requested
-  # number of observations
-  mainPanel(
-    verbatimTextOutput("summary"),
-    
-    tableOutput("view")
+    # Show a summary of the dataset and an HTML table with the 
+	 # requested number of observations
+    mainPanel(
+      verbatimTextOutput("summary"),
+      
+      tableOutput("view")
+    )
   )
 ))

inst/examples/03_reactivity/DESCRIPTION

@@ -0,0 +1,7 @@
+Title: Reactivity
+Author: RStudio, Inc.
+AuthorUrl: http://www.rstudio.com/
+License: MIT
+DisplayMode: Showcase
+Tags: getting-started
+Type: Shiny

inst/examples/03_reactivity/Readme.md

@@ -0,0 +1,5 @@
+This example demonstrates a core feature of Shiny: **reactivity**. In `server.R`, a reactive called `datasetInput` is declared. 
+
+Notice that the reactive expression depends on the input expression `input$dataset`, and that it's used by both the output expression `output$summary` and `output$view`. Try changing the dataset (using *Choose a dataset*) while looking at the reactive and then at the outputs; you will see first the reactive and then its dependencies flash. 
+
+Notice also that the reactive expression doesn't just update whenever anything changes--only the inputs it depends on will trigger an update. Change the "Caption" field and notice how only the `output$caption` expression is re-evaluated; the reactive and its dependents are left alone.

inst/examples/03_reactivity/server.R

@@ -1,17 +1,16 @@
 library(shiny)
 library(datasets)
 
-# Define server logic required to summarize and view the selected dataset
+# Define server logic required to summarize and view the selected
+# dataset
 shinyServer(function(input, output) {
 
-  # By declaring databaseInput as a reactive expression we ensure that:
+  # By declaring datasetInput as a reactive expression we ensure 
+  # that:
   #
   #  1) It is only called when the inputs it depends on changes
-  #  2) The computation and result are shared by all the callers (it 
-  #     only executes a single time)
-  #  3) When the inputs change and the expression is re-executed, the
-  #     new result is compared to the previous result; if the two are
-  #     identical, then the callers are not notified
+  #  2) The computation and result are shared by all the callers 
+  #	  (it only executes a single time)
   #
   datasetInput <- reactive({
     switch(input$dataset,
@@ -20,30 +19,34 @@ shinyServer(function(input, output) {
            "cars" = cars)
   })
   
-  # The output$caption is computed based on a reactive expression that
-  # returns input$caption. When the user changes the "caption" field:
+  # The output$caption is computed based on a reactive expression
+  # that returns input$caption. When the user changes the
+  # "caption" field:
   #
-  #  1) This function is automatically called to recompute the output 
-  #  2) The new caption is pushed back to the browser for re-display
+  #  1) This function is automatically called to recompute the 
+  #     output 
+  #  2) The new caption is pushed back to the browser for 
+  #     re-display
   # 
-  # Note that because the data-oriented reactive expressions below don't 
-  # depend on input$caption, those expressions are NOT called when 
-  # input$caption changes.
+  # Note that because the data-oriented reactive expressions
+  # below don't depend on input$caption, those expressions are
+  # NOT called when input$caption changes.
   output$caption <- renderText({
     input$caption
   })
   
-  # The output$summary depends on the datasetInput reactive expression, 
-  # so will be re-executed whenever datasetInput is re-executed 
+  # The output$summary depends on the datasetInput reactive
+  # expression, so will be re-executed whenever datasetInput is
+  # invalidated
   # (i.e. whenever the input$dataset changes)
   output$summary <- renderPrint({
     dataset <- datasetInput()
     summary(dataset)
   })
   
-  # The output$view depends on both the databaseInput reactive expression
-  # and input$obs, so will be re-executed whenever input$dataset or 
-  # input$obs is changed. 
+  # The output$view depends on both the databaseInput reactive
+  # expression and input$obs, so will be re-executed whenever
+  # input$dataset or input$obs is changed. 
   output$view <- renderTable({
     head(datasetInput(), n = input$obs)
   })

inst/examples/03_reactivity/ui.R

@@ -1,32 +1,34 @@
 library(shiny)
 
 # Define UI for dataset viewer application
-shinyUI(pageWithSidebar(
+shinyUI(fluidPage(
   
   # Application title
-  headerPanel("Reactivity"),
+  titlePanel("Reactivity"),
   
-  # Sidebar with controls to provide a caption, select a dataset, and 
-  # specify the number of observations to view. Note that changes made
-  # to the caption in the textInput control are updated in the output
-  # area immediately as you type
-  sidebarPanel(
-    textInput("caption", "Caption:", "Data Summary"),
+  # Sidebar with controls to provide a caption, select a dataset,
+  # and specify the number of observations to view. Note that
+  # changes made to the caption in the textInput control are
+  # updated in the output area immediately as you type
+  sidebarLayout(
+    sidebarPanel(
+      textInput("caption", "Caption:", "Data Summary"),
+      
+      selectInput("dataset", "Choose a dataset:", 
+                  choices = c("rock", "pressure", "cars")),
+      
+      numericInput("obs", "Number of observations to view:", 10)
+    ),
     
-    selectInput("dataset", "Choose a dataset:", 
-                choices = c("rock", "pressure", "cars")),
     
-    numericInput("obs", "Number of observations to view:", 10)
-  ),
-  
-  
-  # Show the caption, a summary of the dataset and an HTML table with
-  # the requested number of observations
-  mainPanel(
-    h3(textOutput("caption")), 
-    
-    verbatimTextOutput("summary"), 
-    
-    tableOutput("view")
+    # Show the caption, a summary of the dataset and an HTML 
+	 # table with the requested number of observations
+    mainPanel(
+      h3(textOutput("caption", container = span)),
+      
+      verbatimTextOutput("summary"), 
+      
+      tableOutput("view")
+    )
   )
 ))

inst/examples/04_mpg/DESCRIPTION

@@ -0,0 +1,7 @@
+Title: Miles Per Gallon
+Author: RStudio, Inc.
+AuthorUrl: http://www.rstudio.com/
+License: MIT
+DisplayMode: Showcase
+Tags: getting-started
+Type: Shiny

inst/examples/04_mpg/Readme.md

@@ -0,0 +1,4 @@
+This example demonstrates the following concepts:
+
+* **Global variables**: The `mpgData` variable is declared outside the `shinyServer` function. This makes it available anywhere inside `shinyServer`. The code in `server.R` outside `shinyServer` is only run once when the app starts up, so it can't contain user input.
+* **Reactive expressions**: `formulaText` is a reactive expression. Note how it re-evaluates when the Variable field is changed, but not when the Show Outliers box is ticked. 

inst/examples/04_mpg/server.R

@@ -1,17 +1,19 @@
 library(shiny)
 library(datasets)
 
-# We tweak the "am" field to have nicer factor labels. Since this doesn't
-# rely on any user inputs we can do this once at startup and then use the
-# value throughout the lifetime of the application
+# We tweak the "am" field to have nicer factor labels. Since
+# this doesn't rely on any user inputs we can do this once at
+# startup and then use the value throughout the lifetime of the
+# application
 mpgData <- mtcars
 mpgData$am <- factor(mpgData$am, labels = c("Automatic", "Manual"))
 
 
-# Define server logic required to plot various variables against mpg
+# 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 forumla text in a reactive expression since it is
   # shared by the output$caption and output$mpgPlot functions
   formulaText <- reactive({
     paste("mpg ~", input$variable)
@@ -22,8 +24,8 @@ shinyServer(function(input, output) {
     formulaText()
   })
   
-  # Generate a plot of the requested variable against mpg and only 
-  # include outliers if requested
+  # Generate a plot of the requested variable against mpg and
+  # only include outliers if requested
   output$mpgPlot <- renderPlot({
     boxplot(as.formula(formulaText()), 
             data = mpgData,

inst/examples/04_mpg/ui.R

@@ -1,26 +1,29 @@
 library(shiny)
 
 # Define UI for miles per gallon application
-shinyUI(pageWithSidebar(
+shinyUI(fluidPage(
   
   # Application title
-  headerPanel("Miles Per Gallon"),
+  titlePanel("Miles Per Gallon"),
   
-  # Sidebar with controls to select the variable to plot against mpg
-  # and to specify whether outliers should be included
-  sidebarPanel(
-    selectInput("variable", "Variable:",
-                c("Cylinders" = "cyl",
-                  "Transmission" = "am",
-                  "Gears" = "gear")),
-
-    checkboxInput("outliers", "Show outliers", FALSE)
-  ),
+  # Sidebar with controls to select the variable to plot against
+  # mpg and to specify whether outliers should be included
+  sidebarLayout(
+    sidebarPanel(
+      selectInput("variable", "Variable:",
+                  c("Cylinders" = "cyl",
+                    "Transmission" = "am",
+                    "Gears" = "gear")),
   
-  # Show the caption and plot of the requested variable against mpg
-  mainPanel(
-    h3(textOutput("caption")),
+      checkboxInput("outliers", "Show outliers", FALSE)
+    ),
     
-    plotOutput("mpgPlot")
+	 # Show the caption and plot of the requested variable against
+	 # mpg
+    mainPanel(
+      h3(textOutput("caption")),
+      
+      plotOutput("mpgPlot")
+    )
   )
 ))

inst/examples/05_sliders/DESCRIPTION

@@ -0,0 +1,7 @@
+Title: Sliders
+Author: RStudio, Inc.
+AuthorUrl: http://www.rstudio.com/
+License: MIT
+DisplayMode: Showcase
+Tags: getting-started
+Type: Shiny

inst/examples/05_sliders/Readme.md

@@ -0,0 +1,3 @@
+This example demonstrates Shiny's versatile `sliderInput` widget. 
+
+Slider inputs can be used to select single values, to select a continuous range of values, and even to animate over a range.

inst/examples/05_sliders/server.R

@@ -3,7 +3,8 @@ library(shiny)
 # Define server logic for slider examples
 shinyServer(function(input, output) {
   
-  # Reactive expression to compose a data frame containing all of the values
+  # Reactive expression to compose a data frame containing all of
+  # the values
   sliderValues <- reactive({
     
     # Compose data frame

inst/examples/05_sliders/ui.R

@@ -1,37 +1,43 @@
 library(shiny)
 
 # Define UI for slider demo application
-shinyUI(pageWithSidebar(
+shinyUI(fluidPage(
   
   #  Application title
-  headerPanel("Sliders"),
+  titlePanel("Sliders"),
   
-  # Sidebar with sliders that demonstrate various available options
-  sidebarPanel(
-    # Simple integer interval
-    sliderInput("integer", "Integer:", 
-                min=0, max=1000, value=500),
+  # Sidebar with sliders that demonstrate various available
+  # options
+  sidebarLayout(
+    sidebarPanel(
+      # Simple integer interval
+      sliderInput("integer", "Integer:", 
+                  min=0, max=1000, value=500),
+      
+      # Decimal interval with step value
+      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, 
+		# with basic animation
+      sliderInput("format", "Custom Format:", 
+                  min = 0, max = 10000, value = 0, step = 2500,
+                  format="$#,##0", locale="us", 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))
+    ),
     
-    # Decimal interval with step value
-    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, with basic animation
-    sliderInput("format", "Custom Format:", 
-                min = 0, max = 10000, value = 0, step = 2500,
-                format="$#,##0", locale="us", 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")
+    # Show a table summarizing the values entered
+    mainPanel(
+      tableOutput("values")
+    )
   )
-))
+))

inst/examples/06_tabsets/DESCRIPTION

@@ -0,0 +1,7 @@
+Title: Tabsets
+Author: RStudio, Inc.
+AuthorUrl: http://www.rstudio.com/
+License: MIT
+DisplayMode: Showcase
+Tags: getting-started
+Type: Shiny

inst/examples/06_tabsets/Readme.md

@@ -0,0 +1,9 @@
+This example demonstrates the `tabsetPanel` and `tabPanel` widgets.
+
+Notice that outputs that are not visible are not re-evaluated until they become visible. Try this: 
+
+1. Scroll to the bottom of `server.R`
+2. Change the number of observations, and observe that only `output$plot` is evaluated.
+3. Click the Summary tab, and observe that `output$summary` is evaluated.
+4. Change the number of observations again, and observe that now only `output$summary` is evaluated.
+

inst/examples/06_tabsets/server.R

@@ -3,9 +3,10 @@ library(shiny)
 # Define server logic for random distribution application
 shinyServer(function(input, output) {
   
-  # Reactive expression to generate the requested distribution. This is 
-  # called whenever the inputs change. The output functions defined 
-  # below then all use the value computed from this expression
+  # Reactive expression to generate the requested distribution.
+  # This is called whenever the inputs change. The output
+  # functions defined below then all use the value computed from
+  # this expression
   data <- reactive({
     dist <- switch(input$dist,
                    norm = rnorm,
@@ -17,10 +18,11 @@ shinyServer(function(input, output) {
     dist(input$n)
   })
   
-  # Generate a plot of the data. Also uses the inputs to build the 
-  # plot label. Note that the dependencies on both the inputs and
-  # the data reactive expression are both tracked, and all expressions 
-  # are called in the sequence implied by the dependency graph
+  # Generate a plot of the data. Also uses the inputs to build
+  # the plot label. Note that the dependencies on both the inputs
+  # and the data reactive expression are both tracked, and
+  # all expressions are called in the sequence implied by the
+  # dependency graph
   output$plot <- renderPlot({
     dist <- input$dist
     n <- input$n

inst/examples/06_tabsets/ui.R

@@ -1,36 +1,38 @@
 library(shiny)
 
 # Define UI for random distribution application 
-shinyUI(pageWithSidebar(
+shinyUI(fluidPage(
     
   # Application title
-  headerPanel("Tabsets"),
+  titlePanel("Tabsets"),
   
   # Sidebar with controls to select the random distribution type
-  # and number of observations to generate. Note the use of the br()
-  # element to introduce extra vertical spacing
-  sidebarPanel(
-    radioButtons("dist", "Distribution type:",
-                 c("Normal" = "norm",
-                   "Uniform" = "unif",
-                   "Log-normal" = "lnorm",
-                   "Exponential" = "exp")),
-    br(),
+  # and number of observations to generate. Note the use of the
+  # br() element to introduce extra vertical spacing
+  sidebarLayout(
+    sidebarPanel(
+      radioButtons("dist", "Distribution type:",
+                   c("Normal" = "norm",
+                     "Uniform" = "unif",
+                     "Log-normal" = "lnorm",
+                     "Exponential" = "exp")),
+      br(),
+      
+      sliderInput("n", 
+                  "Number of observations:", 
+                   value = 500,
+                   min = 1, 
+                   max = 1000)
+    ),
     
-    sliderInput("n", 
-                "Number of observations:", 
-                 value = 500,
-                 min = 1, 
-                 max = 1000)
-  ),
-  
-  # Show a tabset that includes a plot, summary, and table view
-  # of the generated distribution
-  mainPanel(
-    tabsetPanel(
-      tabPanel("Plot", plotOutput("plot")), 
-      tabPanel("Summary", verbatimTextOutput("summary")), 
-      tabPanel("Table", tableOutput("table"))
+    # Show a tabset that includes a plot, summary, and table view
+    # of the generated distribution
+    mainPanel(
+      tabsetPanel(type = "tabs", 
+        tabPanel("Plot", plotOutput("plot")), 
+        tabPanel("Summary", verbatimTextOutput("summary")), 
+        tabPanel("Table", tableOutput("table"))
+      )
     )
   )
 ))

inst/examples/07_widgets/DESCRIPTION

@@ -0,0 +1,7 @@
+Title: Widgets
+Author: RStudio, Inc.
+AuthorUrl: http://www.rstudio.com/
+License: MIT
+DisplayMode: Showcase
+Tags: getting-started
+Type: Shiny

inst/examples/07_widgets/Readme.md

@@ -0,0 +1 @@
+This example demonstrates some additional widgets included in Shiny, such as `helpText` and `submitButton`. The latter is used to delay rendering output until the user explicitly requests it.

inst/examples/07_widgets/server.R

@@ -1,7 +1,8 @@
 library(shiny)
 library(datasets)
 
-# Define server logic required to summarize and view the selected dataset
+# Define server logic required to summarize and view the 
+# selected dataset
 shinyServer(function(input, output) {
   
   # Return the requested dataset

inst/examples/07_widgets/ui.R

@@ -1,39 +1,43 @@
 library(shiny)
 
 # Define UI for dataset viewer application
-shinyUI(pageWithSidebar(
+shinyUI(fluidPage(
   
   # Application title.
-  headerPanel("More Widgets"),
+  titlePanel("More Widgets"),
   
-  # Sidebar with controls to select a dataset and specify the number
-  # of observations to view. The helpText function is also used to 
-  # include clarifying text. Most notably, the inclusion of a 
-  # submitButton defers the rendering of output until the user 
-  # explicitly clicks the button (rather than doing it immediately
-  # when inputs change). This is useful if the computations required
-  # to render output are inordinately time-consuming.
-  sidebarPanel(
-    selectInput("dataset", "Choose a dataset:", 
-                choices = c("rock", "pressure", "cars")),
+  # Sidebar with controls to select a dataset and specify the
+  # number of observations to view. The helpText function is
+  # also used to include clarifying text. Most notably, the
+  # inclusion of a submitButton defers the rendering of output
+  # until the user explicitly clicks the button (rather than
+  # doing it immediately when inputs change). This is useful if
+  # the computations required to render output are inordinately
+  # time-consuming.
+  sidebarLayout(
+    sidebarPanel(
+      selectInput("dataset", "Choose a dataset:", 
+                  choices = c("rock", "pressure", "cars")),
+      
+      numericInput("obs", "Number of observations to view:", 10),
+      
+      helpText("Note: while the data view will show only the specified",
+               "number of observations, the summary will still be based",
+               "on the full dataset."),
+      
+      submitButton("Update View")
+    ),
     
-    numericInput("obs", "Number of observations to view:", 10),
-    
-    helpText("Note: while the data view will show only the specified",
-             "number of observations, the summary will still be based",
-             "on the full dataset."),
-    
-    submitButton("Update View")
-  ),
-  
-  # Show a summary of the dataset and an HTML table with the requested
-  # number of observations. Note the use of the h4 function to provide
-  # an additional header above each output section.
-  mainPanel(
-    h4("Summary"),
-    verbatimTextOutput("summary"),
-    
-    h4("Observations"),
-    tableOutput("view")
+    # Show a summary of the dataset and an HTML table with the
+    # requested number of observations. Note the use of the h4
+    # function to provide an additional header above each output
+    # section.
+    mainPanel(
+      h4("Summary"),
+      verbatimTextOutput("summary"),
+      
+      h4("Observations"),
+      tableOutput("view")
+    )
   )
-))
+))

inst/examples/08_html/DESCRIPTION

@@ -0,0 +1,7 @@
+Title: Custom HTML UI
+Author: RStudio, Inc.
+AuthorUrl: http://www.rstudio.com/
+License: MIT
+DisplayMode: Showcase
+Tags: getting-started
+Type: Shiny

inst/examples/08_html/Readme.md

@@ -0,0 +1,4 @@
+Normally we use the built-in functions, such as `textInput()`, to generate
+the HTML UI in the R script `ui.R`. Actually **shiny** also works with a
+custom HTML page `www/index.html`. See [the
+tutorial](http://rstudio.github.io/shiny/tutorial/#html-ui) for more details.

inst/examples/09_upload/DESCRIPTION

@@ -0,0 +1,7 @@
+Title: File Upload
+Author: RStudio, Inc.
+AuthorUrl: http://www.rstudio.com/
+License: MIT
+DisplayMode: Showcase
+Tags: getting-started
+Type: Shiny

inst/examples/09_upload/Readme.md

@@ -0,0 +1,4 @@
+We can add a file upload input in the UI using the function `fileInput()`,
+e.g. `fileInput('foo')`. In `server.R`, we can access the uploaded files via
+`input$foo`. See [the
+tutorial](http://rstudio.github.io/shiny/tutorial/#uploads) for more details.

inst/examples/09_upload/server.R

@@ -3,16 +3,18 @@ library(shiny)
 shinyServer(function(input, output) {
   output$contents <- renderTable({
     
-    # input$file1 will be NULL initially. After the user selects and uploads a 
-    # file, it will be a data frame with 'name', 'size', 'type', and 'data' 
-    # columns. The 'data' column will contain the local filenames where the data
-    # can be found.
+    # input$file1 will be NULL initially. After the user selects
+    # and uploads a file, it will be a data frame with 'name',
+    # 'size', 'type', and 'datapath' columns. The 'datapath'
+    # column will contain the local filenames where the data can
+    # be found.
 
     inFile <- input$file1
 
     if (is.null(inFile))
       return(NULL)
     
-    read.csv(inFile$data, header=input$header, sep=input$sep, quote=input$quote)
+    read.csv(inFile$datapath, header=input$header, sep=input$sep, 
+				 quote=input$quote)
   })
 })

inst/examples/09_upload/ui.R

@@ -1,24 +1,28 @@
 library(shiny)
 
-shinyUI(pageWithSidebar(
-  headerPanel("CSV Viewer"),
-  sidebarPanel(
-    fileInput('file1', 'Choose CSV File',
-              accept=c('text/csv', 'text/comma-separated-values,text/plain')),
-    tags$hr(),
-    checkboxInput('header', 'Header', TRUE),
-    radioButtons('sep', 'Separator',
-                 c(Comma=',',
-                   Semicolon=';',
-                   Tab='\t'),
-                 'Comma'),
-    radioButtons('quote', 'Quote',
-                 c(None='',
-                   'Double Quote'='"',
-                   'Single Quote'="'"),
-                 'Double Quote')
-  ),
-  mainPanel(
-    tableOutput('contents')
+shinyUI(fluidPage(
+  titlePanel("Uploading Files"),
+  sidebarLayout(
+    sidebarPanel(
+      fileInput('file1', 'Choose CSV File',
+                accept=c('text/csv', 
+								 'text/comma-separated-values,text/plain', 
+								 '.csv')),
+      tags$hr(),
+      checkboxInput('header', 'Header', TRUE),
+      radioButtons('sep', 'Separator',
+                   c(Comma=',',
+                     Semicolon=';',
+                     Tab='\t'),
+                   ','),
+      radioButtons('quote', 'Quote',
+                   c(None='',
+                     'Double Quote'='"',
+                     'Single Quote'="'"),
+                   '"')
+    ),
+    mainPanel(
+      tableOutput('contents')
+    )
   )
 ))

inst/examples/10_download/DESCRIPTION

@@ -0,0 +1,7 @@
+Title: File Download
+Author: RStudio, Inc.
+AuthorUrl: http://www.rstudio.com/
+License: MIT
+DisplayMode: Showcase
+Tags: getting-started
+Type: Shiny

inst/examples/10_download/Readme.md

@@ -0,0 +1,4 @@
+We can add a download button to the UI using `downloadButton()`, and write
+the content of the file in `downloadHandler()` in `server.R`. See [the
+tutorial](http://rstudio.github.io/shiny/tutorial/#downloads) for more
+details.

inst/examples/10_download/server.R

@@ -11,7 +11,9 @@ shinyServer(function(input, output) {
   })
   
   output$downloadData <- downloadHandler(
-    filename = function() { paste(input$dataset, '.csv', sep='') },
+    filename = function() { 
+		 paste(input$dataset, '.csv', sep='') 
+	 },
     content = function(file) {
       write.csv(datasetInput(), file)
     }

inst/examples/10_download/ui.R

@@ -1,11 +1,13 @@
-shinyUI(pageWithSidebar(
-  headerPanel('Downloading Data'),
-  sidebarPanel(
-    selectInput("dataset", "Choose a dataset:", 
-                choices = c("rock", "pressure", "cars")),
-    downloadButton('downloadData', 'Download')
-  ),
-  mainPanel(
-    tableOutput('table')
+shinyUI(fluidPage(
+  titlePanel('Downloading Data'),
+  sidebarLayout(
+    sidebarPanel(
+      selectInput("dataset", "Choose a dataset:", 
+                  choices = c("rock", "pressure", "cars")),
+      downloadButton('downloadData', 'Download')
+    ),
+    mainPanel(
+      tableOutput('table')
+    )
   )
 ))

inst/examples/11_timer/DESCRIPTION

@@ -0,0 +1,7 @@
+Title: Timer
+Author: RStudio, Inc.
+AuthorUrl: http://www.rstudio.com/
+License: MIT
+DisplayMode: Showcase
+Tags: getting-started
+Type: Shiny

inst/examples/11_timer/Readme.md

@@ -0,0 +1,4 @@
+The function `invalidateLater()` can be used to invalidate an observer or
+reactive expression in a given number of milliseconds. In this example, the
+output `currentTime` is updated every second, so it shows the current time
+on a second basis.

inst/examples/11_timer/server.R

@@ -0,0 +1,6 @@
+shinyServer(function(input, output, session) {
+  output$currentTime <- renderText({
+    invalidateLater(1000, session)
+    paste("The current time is", Sys.time())
+  })
+})

inst/examples/11_timer/ui.R

@@ -0,0 +1,3 @@
+shinyUI(fluidPage(
+  textOutput("currentTime")
+))

inst/tests-js/SpecRunner.html

@@ -0,0 +1,95 @@
+<!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

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

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

@@ -0,0 +1,20 @@
+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

@@ -0,0 +1,681 @@
+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

@@ -0,0 +1,82 @@
+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

@@ -7,7 +7,7 @@ test_that("CSS unit validation", {
   }
 
   # Test strings and expected results
-  strings  <- c("100x", "10px", "10.4px", ".4px", "1px0", "px", "5", "%", "5%", "auto", "1auto", "") 
+  strings  <- c("100x", "10px", "10.4px", ".4px", "1px0", "px", "5", "%", "5%", "auto", "1auto", "")
   expected <- c(NA,     "10px", "10.4px", ".4px", NA,     NA,   NA,  NA,  "5%", "auto", NA,      NA)
   results <- vapply(strings, validateCssUnit_wrap, character(1), USE.NAMES = FALSE)
   expect_equal(results, expected)
@@ -15,3 +15,42 @@ test_that("CSS unit validation", {
   # 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)
+  choices <- x[[2]]$children
+
+  expect_equal(choices[[1]]$children[[1]], 'a')
+  expect_equal(choices[[1]]$attribs$value, 'x1')
+  expect_equal(choices[[1]]$attribs$selected, 'selected')
+
+  expect_equal(choices[[2]]$children[[1]], 'a')
+  expect_equal(choices[[2]]$attribs$value, 'x2')
+  expect_equal(choices[[2]]$attribs$selected, NULL)
+
+  expect_equal(choices[[3]]$children[[1]], 'b')
+  expect_equal(choices[[3]]$attribs$value, 'x3')
+  expect_equal(choices[[3]]$attribs$selected, NULL)
+
+
+  # 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-input-handler.R

@@ -0,0 +1,47 @@
+context("Parse Shiny Input")
+
+test_that("A new type can be registered successfully", {
+  registerInputHandler("shiny.someType", function(){})
+})
+
+test_that("A duplicated type throws", {
+  expect_error({
+    registerInputHandler("shiny.dupType", function(){})
+    registerInputHandler("shiny.dupType", function(){})
+  })
+})
+
+test_that("Date converts to date", {
+  x <- "2013/01/01"
+  class(x) <- "shiny.date"
+  handler <- inputHandlers$get('shiny.date')
+  expect_identical(    
+    handler(x), as.Date(unclass(x))
+  )
+})
+
+test_that("List of dates converts to vector", {
+  x <- list("2013/01/01", "2014/01/01")
+  class(x) <- "shiny.date"
+  handler <- inputHandlers$get('shiny.date')
+  expect_identical(    
+    handler(x), as.Date(unlist(x))
+  )
+})
+
+test_that("Matrix converts list of lists to matrix", {
+  x <- list(a=1:3,b=4:6)
+  class(x) <- "shiny.matrix"
+  handler <- inputHandlers$get('shiny.matrix')
+  expect_identical(
+    handler(x), matrix(c(1:3,4:6), byrow=FALSE, ncol=2)
+  )
+})
+
+test_that("Nulls are not converted to NAs in parsing", {
+  msg <- charToRaw("{\"method\":\"init\",\"data\":{\"obs\":500,\"nullObs\":null}}")
+  expect_identical(
+    decodeMessage(msg), 
+    list(method="init", data=list(obs=500, nullObs=NULL)) 
+  )
+})

inst/tests/test-reactivity.r

@@ -650,3 +650,53 @@ test_that("observe() accepts quoted and unquoted expressions", {
   flushReact()
   expect_identical(parent.env(inside_env), this_env)
 })
+
+test_that("Observer priorities are respected", {
+  results <- c()
+  observe(results <<- c(results, 10), priority=10)
+  observe(results <<- c(results, 30), priority=30)
+  observe(results <<- c(results, 20), priority=20L)
+  observe(results <<- c(results, 21), priority=20)
+  observe(results <<- c(results, 22), priority=20L)
+  
+  flushReact()
+  
+  expect_identical(results, c(30, 20, 21, 22, 10))
+})
+
+test_that("reactivePoll and reactiveFileReader", {
+  path <- tempfile('file')
+  on.exit(unlink(path))
+  write.csv(cars, file=path, row.names=FALSE)
+  rfr <- reactiveFileReader(100, NULL, path, read.csv)
+  expect_equal(isolate(rfr()), cars)
+  
+  write.csv(rbind(cars, cars), file=path, row.names=FALSE)
+  Sys.sleep(0.15)
+  timerCallbacks$executeElapsed()
+  expect_equal(isolate(rfr()), cars)
+  flushReact()
+  expect_equal(isolate(rfr()), rbind(cars, cars))
+})
+
+
+test_that("classes of reactive object", {
+  v <- reactiveValues(a = 1)
+  r <- reactive({ v$a + 1 })
+  o <- observe({ print(r()) })
+
+  expect_false(is.reactivevalues(12))
+  expect_true(is.reactivevalues(v))
+  expect_false(is.reactivevalues(r))
+  expect_false(is.reactivevalues(o))
+
+  expect_false(is.reactive(12))
+  expect_false(is.reactive(v))
+  expect_true(is.reactive(r))
+  expect_false(is.reactive(o))
+})
+
+test_that("{} and NULL also work in reactive()", {
+  reactive({})
+  reactive(NULL)
+})

inst/tests/test-staticdocs.R

@@ -0,0 +1,26 @@
+context("staticdocs")
+
+test_that("All man pages have an entry in staticdocs/index.r", {
+  if (!all(file.exists(c('../../staticdocs', '../../man')))) {
+    # This test works only when run against a package directory
+    return()
+  }
+  # Known not to be indexed
+  known_unindexed <- c("shiny-package")
+
+  indexed_topics <- local({
+    result <- character(0)
+    sd_section <- function(dummy1, dummy2, section_topics) {
+      result <<- c(result, section_topics)
+    }
+    source("../../staticdocs/index.r", local = TRUE)
+    result
+  })
+
+  all_topics <- sub("\\.Rd", "", list.files("../../man", pattern = "*.Rd"))
+
+  # This test ensures that every documented topic is included in
+  # staticdocs/index.r, unless explicitly waived by specifying it
+  # in the known_unindexed variable above.
+  expect_equivalent(sort(all_topics), sort(c(known_unindexed, indexed_topics)))
+})

inst/tests/test-tags.r

@@ -21,3 +21,412 @@ test_that("Basic tag writing works", {
     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/tests/test-url.R

@@ -0,0 +1,20 @@
+context("URL")
+
+test_that("Query string parsing", {
+  expect_identical(
+    parseQueryString("?foo=1&bar=b+a%20r&b+a%20z=baz&=nokey&novalue=&=&noequal&end=end"),
+    list(
+      foo     = '1',
+      bar     = 'b a r',
+      `b a z` = 'baz',
+                'nokey',
+      novalue = '',
+                '',
+      noequal = '',
+      end     = 'end'
+    )
+  )
+
+  # Should be the same with or without leading question mark
+  expect_identical(parseQueryString("?foo=1&bar=b"), parseQueryString("foo=1&bar=b"))
+})

inst/www/reactive-graph.html

@@ -0,0 +1,818 @@
+<!DOCTYPE html>
+<html>
+<script src="http://ajax.googleapis.com/ajax/libs/jquery/1.10.1/jquery.min.js"></script>
+<script src="http://d3js.org/d3.v3.min.js" charset="utf-8"></script>
+<link href='http://fonts.googleapis.com/css?family=Source+Sans+Pro:200,400,600' rel='stylesheet' type='text/css'>
+<style type="text/css">
+html, body {
+  font-family: 'Source Sans Pro', sans-serif;
+  font-weight: 400;
+  overflow: hidden;
+  height: 100%;
+  width: 100%;
+  margin: 0;
+  padding: 0;
+}
+div {
+  -moz-user-select: none; 
+  -khtml-user-select: none; 
+  -webkit-user-select: none; 
+  -o-user-select: none;
+  cursor: default;
+}
+#instructions, #ended {
+  position: relative;
+  font-weight: 200;
+  color: #444;
+  top: 20px;
+  font-size: 30px;
+  text-align: center;
+}
+#ended strong {
+  font-weight: 600;
+}
+svg {
+  position: absolute;
+  left: 0;
+  top: 0;
+  width: 100%;
+  height: 100%;
+}
+.node {
+  cursor: pointer;
+}
+.node text {
+  font-family: 'Source Code Pro', monospace;
+  font-weight: normal;
+  text-anchor: start;
+  fill: #999;
+  user-select: none;
+  transition: fill 0.75s ease;
+}
+.node.running text {
+  fill: black;
+}
+.node.changed text {
+  fill: red;
+}
+.node text tspan {
+  white-space: pre;
+}
+.node path {
+  fill: white;
+  stroke: #777;
+  stroke-width: 7.5px;
+  transition: fill 0.75s ease;
+}
+.node.observer path {
+}
+.node.observable path {
+}
+.node.value path {
+}
+.node.invalidated path {
+  fill: #E0E0E0;
+  /*fill: url(#diagonalHatch);*/
+}
+.node.running path {
+  fill: #61B97E;
+}
+#legend {
+  font-size: 22px;
+  position: fixed;
+  bottom: 10px;
+  right: 20px;
+}
+.color {
+  display: inline-block;
+  border: 1px solid #777;
+  height: 14px;
+  width: 14px;
+}
+.color.normal {
+  background-color: #white;
+}
+.color.invalidated {
+  background-color: #E0E0E0;
+}
+.color.running {
+  background-color: #61B97E;
+}
+#triangle {
+  fill: #CCC;
+}
+.link {
+  fill: none;
+  stroke: #CCC;
+  stroke-width: 0.5px;
+}
+#description {
+  position: fixed;
+  width: 300px;
+  left: 630px;
+  top: 36px;
+  height: auto;
+  display: none;
+}
+#timeline {
+  position: fixed;
+  top: 0;
+  left: 0;
+  right: 0;
+  height: 20px;
+  transition: height 500ms;
+}
+#timeline, #timeline * {
+  cursor: pointer;
+}
+#timeline:hover {
+  height: 32px;
+}
+#timeline-bg {
+  position: absolute;
+  top: 0;
+  left: 0;
+  right: 0;
+  bottom: 12px;
+  background-color: silver;
+}
+#timeline-fill {
+  background-color: #28A3F2;
+  position: absolute;
+  left: 0;
+  top: 0;
+  bottom: 0;
+  width: 0;
+  transition: width 500ms;
+}
+</style>
+<script>
+var log = [
+  { "action" : "valueChange", "id" : "names(input)", "value" : " chr \"dataset\"" },
+  { "action" : "valueChange", "id" : "input (all)", "value" : "List of 1\n $ dataset: chr \"rock\"" },
+  { "action" : "valueChange", "id" : "input$dataset", "value" : " chr \"rock\"" },
+  { "action" : "valueChange", "id" : "names(input)", "value" : " chr [1:2] \"caption\" \"dataset\"" },
+  { "action" : "valueChange", "id" : "input (all)", "value" : "List of 2\n $ caption: chr \"Data Summary\"\n $ dataset: chr \"rock\"" },
+  { "action" : "valueChange", "id" : "input$caption", "value" : " chr \"Data Summary\"" },
+  { "action" : "valueChange", "id" : "names(input)", "value" : " chr [1:3] \"caption\" \"dataset\" \"obs\"" },
+  { "action" : "valueChange", "id" : "input (all)", "value" : "List of 3\n $ caption: chr \"Data Summary\"\n $ obs    : num 10\n $ dataset: chr \"rock\"" },
+  { "action" : "valueChange", "id" : "input$obs", "value" : " num 10" },
+  { "action" : "valueChange", "id" : "names(clientData)", "value" : " chr \"output_caption_hidden\"" },
+  { "action" : "valueChange", "id" : "clientData (all)", "value" : "List of 1\n $ output_caption_hidden: logi FALSE" },
+  { "action" : "valueChange", "id" : "clientData$output_caption_hidden", "value" : " logi FALSE" },
+  { "action" : "valueChange", "id" : "names(clientData)", "value" : " chr [1:2] \"output_caption_hidden\" \"output_summary_hidden\"" },
+  { "action" : "valueChange", "id" : "clientData (all)", "value" : "List of 2\n $ output_caption_hidden: logi FALSE\n $ output_summary_hidden: logi FALSE" },
+  { "action" : "valueChange", "id" : "clientData$output_summary_hidden", "value" : " logi FALSE" },
+  { "action" : "valueChange", "id" : "names(clientData)", "value" : " chr [1:3] \"output_caption_hidden\" \"output_summary_hidden\" \"output_view_hidden\"" },
+  { "action" : "valueChange", "id" : "clientData (all)", "value" : "List of 3\n $ output_view_hidden   : logi FALSE\n $ output_caption_hidden: logi FALSE\n $ output_summary_hidden: logi FALSE" },
+  { "action" : "valueChange", "id" : "clientData$output_view_hidden", "value" : " logi FALSE" },
+  { "action" : "valueChange", "id" : "names(clientData)", "value" : " chr [1:4] \"output_caption_hidden\" \"output_summary_hidden\" \"output_view_hidden\" ..." },
+  { "action" : "valueChange", "id" : "clientData (all)", "value" : "List of 4\n $ output_view_hidden   : logi FALSE\n $ output_caption_hidden: logi FALSE\n $ pixelratio           : num 2\n $ output_summary_hidden: logi FALSE" },
+  { "action" : "valueChange", "id" : "clientData$pixelratio", "value" : " num 2" },
+  { "action" : "valueChange", "id" : "names(clientData)", "value" : " chr [1:5] \"output_caption_hidden\" \"output_summary_hidden\" \"output_view_hidden\" ..." },
+  { "action" : "valueChange", "id" : "clientData (all)", "value" : "List of 5\n $ output_view_hidden   : logi FALSE\n $ output_caption_hidden: logi FALSE\n $ pixelratio           : num 2\n $ output_summary_hidden: logi FALSE\n $ url_protocol         : chr \"http:\"" },
+  { "action" : "valueChange", "id" : "clientData$url_protocol", "value" : " chr \"http:\"" },
+  { "action" : "valueChange", "id" : "names(clientData)", "value" : " chr [1:6] \"output_caption_hidden\" \"output_summary_hidden\" \"output_view_hidden\" ..." },
+  { "action" : "valueChange", "id" : "clientData (all)", "value" : "List of 6\n $ output_view_hidden   : logi FALSE\n $ output_caption_hidden: logi FALSE\n $ pixelratio           : num 2\n $ url_hostname         : chr \"localhost\"\n $ output_summary_hidden: logi FALSE\n $ url_protocol         : chr \"http:\"" },
+  { "action" : "valueChange", "id" : "clientData$url_hostname", "value" : " chr \"localhost\"" },
+  { "action" : "valueChange", "id" : "names(clientData)", "value" : " chr [1:7] \"output_caption_hidden\" \"output_summary_hidden\" \"output_view_hidden\" ..." },
+  { "action" : "valueChange", "id" : "clientData (all)", "value" : "List of 7\n $ output_view_hidden   : logi FALSE\n $ url_port             : chr \"8100\"\n $ output_caption_hidden: logi FALSE\n $ pixelratio           : num 2\n $ url_hostname         : chr \"localhost\"\n $ output_summary_hidden: logi FALSE\n $ url_protocol         : chr \"http:\"" },
+  { "action" : "valueChange", "id" : "clientData$url_port", "value" : " chr \"8100\"" },
+  { "action" : "valueChange", "id" : "names(clientData)", "value" : " chr [1:8] \"output_caption_hidden\" \"output_summary_hidden\" \"output_view_hidden\" ..." },
+  { "action" : "valueChange", "id" : "clientData (all)", "value" : "List of 8\n $ url_pathname         : chr \"/\"\n $ output_view_hidden   : logi FALSE\n $ url_port             : chr \"8100\"\n $ output_caption_hidden: logi FALSE\n $ pixelratio           : num 2\n $ url_hostname         : chr \"localhost\"\n $ output_summary_hidden: logi FALSE\n $ url_protocol         : chr \"http:\"" },
+  { "action" : "valueChange", "id" : "clientData$url_pathname", "value" : " chr \"/\"" },
+  { "action" : "valueChange", "id" : "names(clientData)", "value" : " chr [1:9] \"output_caption_hidden\" \"output_summary_hidden\" \"output_view_hidden\" ..." },
+  { "action" : "valueChange", "id" : "clientData (all)", "value" : "List of 9\n $ url_pathname         : chr \"/\"\n $ output_view_hidden   : logi FALSE\n $ url_port             : chr \"8100\"\n $ output_caption_hidden: logi FALSE\n $ pixelratio           : num 2\n $ url_hostname         : chr \"localhost\"\n $ output_summary_hidden: logi FALSE\n $ url_search           : chr \"\"\n $ url_protocol         : chr \"http:\"" },
+  { "action" : "valueChange", "id" : "clientData$url_search", "value" : " chr \"\"" },
+  { "action" : "valueChange", "id" : "names(clientData)", "value" : " chr [1:10] \"output_caption_hidden\" \"output_summary_hidden\" \"output_view_hidden\" ..." },
+  { "action" : "valueChange", "id" : "clientData (all)", "value" : "List of 10\n $ url_pathname         : chr \"/\"\n $ output_view_hidden   : logi FALSE\n $ url_port             : chr \"8100\"\n $ output_caption_hidden: logi FALSE\n $ url_hash_initial     : chr \"\"\n $ pixelratio           : num 2\n $ url_hostname         : chr \"localhost\"\n $ output_summary_hidden: logi FALSE\n $ url_search           : chr \"\"\n $ url_protocol         : chr \"http:\"" },
+  { "action" : "valueChange", "id" : "clientData$url_hash_initial", "value" : " chr \"\"" },
+  { "action" : "valueChange", "id" : "names(clientData)", "value" : " chr [1:11] \"allowDataUriScheme\" \"output_caption_hidden\" \"output_summary_hidden\" ..." },
+  { "action" : "valueChange", "id" : "clientData (all)", "value" : "List of 11\n $ allowDataUriScheme   : logi TRUE\n $ url_pathname         : chr \"/\"\n $ output_view_hidden   : logi FALSE\n $ url_port             : chr \"8100\"\n $ output_caption_hidden: logi FALSE\n $ url_hash_initial     : chr \"\"\n $ pixelratio           : num 2\n $ url_hostname         : chr \"localhost\"\n $ output_summary_hidden: logi FALSE\n $ url_search           : chr \"\"\n $ url_protocol         : chr \"http:\"" },
+  { "action" : "valueChange", "id" : "clientData$allowDataUriScheme", "value" : " logi TRUE" },
+  { "action" : "ctx", "id" : "1", "label" : "output$caption <- renderText({ \n    input$caption\n})", "type" : "observer", "prevId" : "" },
+  { "action" : "invalidate", "id" : "1" },
+  { "action" : "ctx", "id" : "2", "label" : "output$summary <- renderPrint({ \n    dataset <- datasetInput()\n    summary(dataset)\n})", "type" : "observer", "prevId" : "" },
+  { "action" : "invalidate", "id" : "2" },
+  { "action" : "ctx", "id" : "3", "label" : "output$view <- renderTable({ \n    head(datasetInput(), n = input$obs)\n})", "type" : "observer", "prevId" : "" },
+  { "action" : "invalidate", "id" : "3" },
+  { "action" : "ctx", "id" : "4", "label" : "output$caption <- renderText({ \n    input$caption\n})", "type" : "observer", "prevId" : "1" },
+  { "action" : "enter", "id" : "4" },
+  { "action" : "dep", "id" : "4", "dependsOn" : "input$caption" },
+  { "action" : "exit", "id" : "4" },
+  { "action" : "ctx", "id" : "5", "label" : "output$summary <- renderPrint({ \n    dataset <- datasetInput()\n    summary(dataset)\n})", "type" : "observer", "prevId" : "2" },
+  { "action" : "enter", "id" : "5" },
+  { "action" : "ctx", "id" : "6", "label" : "reactive({ \n    switch(input$dataset, rock = rock, pressure = pressure, cars = cars)\n})", "type" : "observable", "prevId" : "" },
+  { "action" : "enter", "id" : "6" },
+  { "action" : "dep", "id" : "6", "dependsOn" : "input$dataset" },
+  { "action" : "exit", "id" : "6" },
+  { "action" : "depId", "id" : "5", "dependsOn" : "6" },
+  { "action" : "exit", "id" : "5" },
+  { "action" : "ctx", "id" : "7", "label" : "output$view <- renderTable({ \n    head(datasetInput(), n = input$obs)\n})", "type" : "observer", "prevId" : "3" },
+  { "action" : "enter", "id" : "7" },
+  { "action" : "depId", "id" : "7", "dependsOn" : "6" },
+  { "action" : "dep", "id" : "7", "dependsOn" : "input$obs" },
+  { "action" : "exit", "id" : "7" },
+  { "action" : "valueChange", "id" : "names(input)", "value" : " chr [1:3] \"caption\" \"dataset\" \"obs\"" },
+  { "action" : "valueChange", "id" : "input (all)", "value" : "List of 3\n $ caption: chr \"Pressure Summary\"\n $ obs    : num 10\n $ dataset: chr \"rock\"" },
+  { "action" : "valueChange", "id" : "input$caption", "value" : " chr \"Pressure Summary\"" },
+  { "action" : "invalidate", "id" : "4" },
+  { "action" : "ctx", "id" : "8", "label" : "output$caption <- renderText({ \n    input$caption\n})", "type" : "observer", "prevId" : "4" },
+  { "action" : "enter", "id" : "8" },
+  { "action" : "dep", "id" : "8", "dependsOn" : "input$caption" },
+  { "action" : "exit", "id" : "8" },
+  { "action" : "valueChange", "id" : "names(input)", "value" : " chr [1:3] \"caption\" \"dataset\" \"obs\"" },
+  { "action" : "valueChange", "id" : "input (all)", "value" : "List of 3\n $ caption: chr \"Pressure Summary\"\n $ obs    : num 10\n $ dataset: chr \"pressure\"" },
+  { "action" : "valueChange", "id" : "input$dataset", "value" : " chr \"pressure\"" },
+  { "action" : "invalidate", "id" : "6" },
+  { "action" : "invalidate", "id" : "5" },
+  { "action" : "invalidate", "id" : "7" },
+  { "action" : "ctx", "id" : "9", "label" : "output$summary <- renderPrint({ \n    dataset <- datasetInput()\n    summary(dataset)\n})", "type" : "observer", "prevId" : "5" },
+  { "action" : "enter", "id" : "9" },
+  { "action" : "ctx", "id" : "10", "label" : "reactive({ \n    switch(input$dataset, rock = rock, pressure = pressure, cars = cars)\n})", "type" : "observable", "prevId" : "6" },
+  { "action" : "enter", "id" : "10" },
+  { "action" : "dep", "id" : "10", "dependsOn" : "input$dataset" },
+  { "action" : "exit", "id" : "10" },
+  { "action" : "depId", "id" : "9", "dependsOn" : "10" },
+  { "action" : "exit", "id" : "9" },
+  { "action" : "ctx", "id" : "11", "label" : "output$view <- renderTable({ \n    head(datasetInput(), n = input$obs)\n})", "type" : "observer", "prevId" : "7" },
+  { "action" : "enter", "id" : "11" },
+  { "action" : "depId", "id" : "11", "dependsOn" : "10" },
+  { "action" : "dep", "id" : "11", "dependsOn" : "input$obs" },
+  { "action" : "exit", "id" : "11" },
+  { "action" : "valueChange", "id" : "names(input)", "value" : " chr [1:3] \"caption\" \"dataset\" \"obs\"" },
+  { "action" : "valueChange", "id" : "input (all)", "value" : "List of 3\n $ caption: chr \"Pressure Summary\"\n $ obs    : num 15\n $ dataset: chr \"pressure\"" },
+  { "action" : "valueChange", "id" : "input$obs", "value" : " num 15" },
+  { "action" : "invalidate", "id" : "11" },
+  { "action" : "ctx", "id" : "12", "label" : "output$view <- renderTable({ \n    head(datasetInput(), n = input$obs)\n})", "type" : "observer", "prevId" : "11" },
+  { "action" : "enter", "id" : "12" },
+  { "action" : "depId", "id" : "12", "dependsOn" : "10" },
+  { "action" : "dep", "id" : "12", "dependsOn" : "input$obs" },
+  { "action" : "exit", "id" : "12" }
+];
+try {
+  log = __DATA__;
+} catch (e) {}
+
+var nodes = {};
+var nodeList = [];
+var nodeSelection = null;
+var links = [];
+var linkSelection = null;
+
+var node, link;  // d3 selections
+
+var MAX_LINES = 6;
+
+var force = d3.layout.force()
+    .charge(-100)
+    .nodes(nodeList)
+    .links(links);
+force.on('tick', onTick);
+
+function pathDataForNode(node) {
+  switch (node.type) {
+    case 'observer':
+      return 'M -25,-50  c -75,0 -75,100 0,100  l 100,0  l 0,-100 Z';
+    case 'observable':
+      return 'M -25,-50  c -75,0 -75,100 0,100  l 60,0  l 50,-50  l -50,-50  Z';
+    case 'value':
+      return 'M -50,-50 l 0,100 l 100,0  l 50,-50  l -50,-50  Z';
+  }
+}
+
+function getSourceCoords(node) {
+  switch (node.type) {
+    case 'observer':
+    case 'observable':
+      return {x: node.x - 5, y: node.y};
+    default:
+      return {x: node.x, y: node.y};
+  }
+}
+
+function getTargetCoords(node) {
+  switch (node.type) {
+    case 'observable':
+      return {x: node.x + 7, y: node.y};
+    case 'value':
+      return {x: node.x + 8, y: node.y};
+    default:
+      return {x: node.x, y: node.y};
+  }
+}
+
+function multilineTextNode(node) {
+  var MAX_LINES = 6;
+  var fade = false;
+  var el = d3.select(this);
+  var lines = el.text().split('\n');
+  if (lines.length > MAX_LINES) {
+    lines.splice(MAX_LINES);
+    fade = true;
+  }
+  el.text('');
+  var tspan = el.selectAll('tspan').data(lines);
+  tspan.enter().append('tspan');
+  tspan
+      .attr('x', 8)
+      .attr('dy', function(line, i) { return i > 0 ? '1em' : 0})
+      .attr('opacity', function(line, i) {
+        if (!fade)
+          return 1;
+        return Math.min(1, (MAX_LINES - i) * 0.25 - 0.15);
+      })
+      .text(function(line) { return line; });
+}
+
+function update() {
+  force.size([document.documentElement.clientWidth / 4,
+              document.documentElement.clientHeight / 4]);
+
+  var layoutDirty = false;
+
+  node = d3.select('#nodes').selectAll('.node').data(nodeList);
+  layoutDirty = layoutDirty || !node.enter().empty() || !node.exit().empty();
+  var newG = node.enter().append('g')
+      .attr('class', function(n) {return 'node ' + n.type;})
+      .attr('r', 5)
+      // don't show until next tick
+      .style('display', 'none')
+      .on('mousedown', function() {
+        d3.event.stopPropagation();
+      })
+      .on('mouseover', function(n) {
+        $('#description').text(n.label);
+      })
+      .on('mouseout', function(d, i) {
+        $('#description').html('');
+      })
+      .call(force.drag);
+  newG.append('path')
+      .attr('transform', 'scale(0.08)')
+      .attr('stroke', 'black')
+      .attr('stroke-width', 4)
+      .attr('fill', 'white')
+      .attr('d', pathDataForNode);
+  newG.append('text')
+      .attr('x', 3)
+      .attr('y', 0)
+      .attr('font-size', 3.25)
+      .attr('transform', function(n) {
+        if (n.type !== 'observer')
+          return 'translate(1.5, 0)';
+        else
+          return null;
+      })
+  node.exit().remove();
+  node
+      .classed('invalidated', function(n) { return n.invalidated; })
+      .classed('running', function(n) { return n.running; })
+      .classed('changed', function(n) { return n.changed; })
+      .attr('fill', function(n) {
+        if (n.invalidated)
+          return "url(#diagonalHatch)";
+        else
+          return null;
+      });
+  var tspan = node.selectAll('text').filter(function(n) {
+    // This filter is used to disregard all nodes whose labels have
+    // not changed since the last time we updated them.
+    var changed = n.label !== this.label;
+    this.label = n.label;
+    return changed;
+  }).selectAll('tspan')
+    .data(function(n) {
+      var lines = n.label.replace(/ /g, '\xA0').split('\n');
+      if (lines.length > MAX_LINES) {
+        lines.splice(MAX_LINES);
+      }
+      return lines;
+    });
+  tspan.enter().append('tspan');
+  tspan.exit().remove();
+  tspan
+      .attr('x', 8)
+      .attr('dy', function(line, i) { return i > 0 ? '1em' : 0})
+      .attr('opacity', function(line, i) {
+        return Math.min(1, (MAX_LINES - i) * 0.25 - 0.15);
+      })
+      .text(function(line) { return line; });
+
+  link = d3.select('#links').selectAll('.link').data(links);
+  layoutDirty = layoutDirty || !link.enter().empty() || !link.exit().empty();
+  link.enter().append('path')
+      .attr('class', 'link')
+      .attr('marker-mid', 'url(#triangle)');
+  link.exit().remove();
+
+  if (layoutDirty) {
+    force
+      .nodes(nodeList.filter(function(n) {return !n.hide;}))
+      .start();
+    layoutDirty = false;
+  }
+}
+
+function onTick() {
+  node
+      .style('display', null)
+      .attr('transform', function(n) {
+        return 'translate(' + n.x + ' ' + n.y + ')';
+      });
+  link
+      .attr('d', function(link) {
+        var source = getSourceCoords(link.source);
+        var target = getTargetCoords(link.target)
+        var mid = {
+          x: (source.x + target.x) / 2,
+          y: (source.y + target.y) / 2
+        }
+        return 'M' + source.x + ',' + source.y +
+          ' L' + mid.x + ',' + mid.y +
+          ' L' + target.x + ',' + target.y;
+      });
+}
+
+function createNodeWithUndo(data) {
+  var node;
+  if (!data.prevId) {
+    node = {
+      label: data.label,
+      type: data.type,
+      hide: data.hide
+    };
+    nodes[data.id] = node;
+    pushUndo(function() {
+      delete nodes[data.id];
+    });
+    if (!node.hide) {
+      nodeList.push(node);
+      pushUndo(function() {
+        nodeList.pop();
+      });
+    }
+  } else {
+    node = nodes[data.prevId];
+    var oldLabel = node.label;
+    var oldInvalidated = node.invalidated;
+    delete nodes[data.prevId];
+    nodes[data.id] = node;
+    node.label = data.label;
+    node.invalidated = false;
+    pushUndo(function() {
+      node.label = oldLabel;
+      node.invalidated = oldInvalidated;
+      delete nodes[data.id];
+      nodes[data.prevId] = node;
+    });
+  }
+}
+
+Array.prototype.pushWithUndo = function(value) {
+  var self = this;
+  this.push(value);
+  pushUndo(function() {
+    self.pop();
+  });
+}
+
+Array.prototype.shiftWithUndo = function(value) {
+  var self = this;
+  var value = this.shift();
+  pushUndo(function() {
+    self.unshift(value);
+  });
+  return value;
+}
+
+var undoStack = [];
+var currentUndos = null;
+function startUndoScope() {
+  if (currentUndos !== null)
+    throw new Error('Illegal state');
+  currentUndos = [];
+}
+function pushUndo(func) {
+  currentUndos.push(func);
+}
+function endUndoScope() {
+  var localUndos = currentUndos;
+  undoStack.push(function() {
+    while (localUndos.length) {
+      localUndos.pop()();
+    }
+  });
+  currentUndos = null;
+}
+function undo() {
+  if (undoStack.length) {
+    undoStack.pop()();
+    update();
+    return true;
+  }
+  return false;
+}
+function undoAll() {
+  while (undo()) {}
+}
+
+// Here we monkeypatch Math.random to take part in the undo mechanism.
+// This allows "random" d3 force-layout decisions to be reproducible.
+// If we don't do this, then doing/undoing/redoing a node creation step
+// looks very confusing, as the node comes flying in from a different
+// direction each time.
+var trueRandom = Math.random;
+Math.random = (function() {
+  var randomStack = [];
+  return function() {
+    if (!currentUndos)
+      return trueRandom();
+
+    var value;
+    if (randomStack.length > 0) {
+      value = randomStack.pop();
+    }
+    else {
+      value = trueRandom();
+    }
+    pushUndo(function() {
+      randomStack.push(value);
+    });
+    return value;
+  };
+})();
+
+var callbacks = {
+  ctx: function(data) {
+    createNodeWithUndo(data);
+    return true;
+  },
+  dep: function(data) {
+    var dependsOn = nodes[data.dependsOn];
+    if (!dependsOn) {
+      createNodeWithUndo({id: data.dependsOn, label: data.dependsOn, type: 'value'});
+      dependsOn = nodes[data.dependsOn];
+    }
+    if (dependsOn.hide) {
+      dependsOn.hide = false;
+      nodeList.push(dependsOn);
+      pushUndo(function() {
+        dependsOn.hide = true;
+        nodeList.pop();
+      });
+    }
+    links.push({
+      source: nodes[data.id],
+      target: nodes[data.dependsOn]
+    });
+    pushUndo(function() {
+      links.pop();
+    });
+  },
+  depId: function(data) {
+    links.push({
+      source: nodes[data.id],
+      target: nodes[data.dependsOn]
+    });
+    pushUndo(function() {
+      links.pop();
+    });
+  },
+  invalidate: function(data) {
+    var node = nodes[data.id];
+    if (node.invalidated)
+      throw new Error('Illegal sequence');
+
+    node.invalidated = true;
+    pushUndo(function() {
+      node.invalidated = false;
+    });
+
+    var origLinks = links;
+    links = links.filter(function(link) {
+      return link.source !== node;
+    });
+    pushUndo(function() {
+      links = origLinks;
+    });
+  },
+  valueChange: function(data) {
+    var existed = !!nodes[data.id];
+    createNodeWithUndo({
+      id: data.id,
+      label: data.id + ' = ' + data.value,
+      type: 'value',
+      prevId: nodes[data.id] ? data.id : null,
+      hide: existed ? nodes[data.id].hide : true
+    });
+    if (!existed || nodes[data.id].hide)
+      return true;
+    nodes[data.id].changed = true;
+    pushUndo(function() {
+      nodes[data.id].changed = false;
+    });
+    executeBeforeNextCommand.pushWithUndo(function() {
+      nodes[data.id].changed = false;
+      pushUndo(function() {
+        nodes[data.id].changed = true;
+      });
+    });
+  },
+  enter: function(data) {
+    var node = nodes[data.id];
+    node.running = true;
+    pushUndo(function() {
+      node.running = false;
+    });
+  },
+  exit: function(data) {
+    var node = nodes[data.id];
+    node.running = false;
+    pushUndo(function() {
+      node.running = true;
+    });
+  }
+};
+
+function processMessage(data, suppressUpdate) {
+  console.log(JSON.stringify(data));
+  if (!callbacks.hasOwnProperty(data.action))
+    throw new Error('Unknown action ' + data.action);
+  var result = callbacks[data.action].call(callbacks, data);
+  if (!suppressUpdate)
+    update();
+  return result;
+}
+
+var executeBeforeNextCommand = [];
+function doNext(suppressUpdate) {
+  if (!log.length)
+    return;
+
+  startUndoScope();
+  while (executeBeforeNextCommand.length) {
+    executeBeforeNextCommand.shiftWithUndo()();
+  }
+  while (log.length) {
+    var result = (function() {
+      var message = log.shift();
+      pushUndo(function() {
+        log.unshift(message);
+      })
+      return processMessage(message, suppressUpdate);
+    })();
+    if (!result)
+      break;
+  }
+  if (!log.length) {
+    $('#ended').fadeIn(1500);
+    pushUndo(function() {
+      $('#ended').hide();
+    });
+  }
+  step++;
+  updateTimeline();
+  pushUndo(function() {
+    step--;
+    updateTimeline();
+  });
+  endUndoScope();
+}
+
+function countSteps() {
+  if (undoStack.length !== 0) {
+    throw new Error(
+      'Illegal state; must call countSteps before execution begins');
+  }
+  var steps = 0;
+  while (log.length) {
+    doNext();
+    steps++;
+  }
+  while (undoStack.length)
+    undoStack.pop()();
+  return steps;
+}
+
+function updateTimeline() {
+  $('#timeline-fill').width((step/totalSteps*100) + '%');
+}
+
+function zoom() {
+  var scale = d3.event.scale;
+  var x = d3.event.translate[0];
+  var y = d3.event.translate[1];
+  d3.select('#viz').attr('transform', 'scale(' + scale + ') translate(' + x/scale + ' ' + y/scale + ')');
+}
+
+// The total number of steps, as far as the user is concerned, in the log.
+// This may/will be different than the number of log entries, since each
+// step may include more than one log entry.
+var totalSteps;
+// The current step we're on.
+var step;
+$(function() {
+  d3.select('svg').call(d3.behavior.zoom().scale(4).on('zoom', zoom));
+  $(document.body).on('keydown', function(e) {
+    if (e.which === 39 || e.which === 32) { // space, right
+      // Move one step ahead
+      doNext();
+    }
+    if (e.which === 37) { // left
+      // Move one step back
+      undo();
+    }
+    if (e.which === 35) { // end
+      // Seek to end
+      while (log.length) {
+        doNext();
+      }
+    }
+    if (e.which === 36) { // home
+      // Seek to beginning
+      undoAll();
+    }
+  });
+
+  // Timeline click and scrub
+  $('#timeline').on('click mousemove', function(e) {
+    // Make sure left mouse button is down.
+    // Firefox is stupid; e.which is always 1 on mousemove events,
+    // even when button is not down!! So read e.originalEvent.buttons.
+    if (typeof(e.originalEvent.buttons) !== 'undefined') {
+      if (e.originalEvent.buttons !== 1)
+        return;
+    } else if (e.which !== 1) {
+      return;
+    }
+
+    var timeline = e.currentTarget;
+    var pos = e.offsetX || e.originalEvent.layerX;
+    var width = timeline.offsetWidth;
+    var targetStep = Math.round((pos/width) * totalSteps);
+    while (step < targetStep) {
+      doNext();
+    }
+    while (step > targetStep && step != 1) {
+      undo();
+    }
+  });
+
+  totalSteps = countSteps();
+  step = 0;
+
+  doNext();
+
+  // don't allow undoing past initial state
+  while (undoStack.length)
+    undoStack.pop();
+  executeBeforeNextCommand.push(function() {
+    $('#instructions').fadeOut(1000);
+    // It's weird for the instructions to fade back in, so no pushUndo here
+  });
+});
+</script>
+<body>
+  <svg>
+    <defs>
+      <marker id="triangle"
+              viewBox="0 0 10 10" 
+              refX="5" refY="5"
+              markerWidth="6" 
+              markerHeight="6"
+              orient="auto">
+          <path d="M 10 0 L 0 5 L 10 10 z" />
+      </marker>
+      <pattern id="diagonalHatch" patternUnits="userSpaceOnUse" width="1" height="1">
+        <path stroke="black" stroke-width="0.25" fill="none"
+          d="M-1,1 l2,-2
+             M0,4 l4,-4
+             M3,5 l2,-2" />
+      </pattern>
+    </defs>
+    <g id="viz" transform="scale(4)">
+      <g id="links"></g>
+      <g id="nodes"></g>
+    </g>
+  </svg>
+  <div id="instructions">
+    Press right-arrow to advance
+  </div>
+  <div id="ended" style="display: none;">
+    <strong>You&rsquo;ve reached the end</strong><br/>Press the Home key to start over
+  </div>
+  <div id="legend">
+    <div class="color normal"></div> Normal<br/>
+    <div class="color invalidated"></div> Invalidated<br/>
+    <div class="color running"></div> Running<br/>
+  </div>
+  <br/>
+  <pre id="description"><br/></pre>
+  <div id="timeline">
+    <div id="timeline-bg">
+      <div id="timeline-fill"></div>
+    </div>
+  </div>
+</body>
+</html>

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

@@ -1,11 +1,11 @@
 /*!
- * Bootstrap Responsive v2.1.0
+ * Bootstrap Responsive v2.3.2
  *
- * Copyright 2012 Twitter, Inc
+ * Copyright 2013 Twitter, Inc
  * Licensed under the Apache License v2.0
  * http://www.apache.org/licenses/LICENSE-2.0
  *
- * Designed and built with all the love in the world @twitter by @mdo and @fat.
+ * Designed and built with all the love in the world by @mdo and @fat.
  */
 
 .clearfix {
@@ -40,6 +40,10 @@
           box-sizing: border-box;
 }
 
+@-ms-viewport {
+  width: device-width;
+}
+
 .hidden {
   display: none;
   visibility: hidden;
@@ -91,6 +95,19 @@
   }
 }
 
+.visible-print {
+  display: none !important;
+}
+
+@media print {
+  .visible-print {
+    display: inherit !important;
+  }
+  .hidden-print {
+    display: none !important;
+  }
+}
+
 @media (min-width: 1200px) {
   .row {
     margin-left: -30px;
@@ -107,6 +124,7 @@
   }
   [class*="span"] {
     float: left;
+    min-height: 1px;
     margin-left: 30px;
   }
   .container,
@@ -214,6 +232,9 @@
   .row-fluid [class*="span"]:first-child {
     margin-left: 0;
   }
+  .row-fluid .controls-row [class*="span"] + [class*="span"] {
+    margin-left: 2.564102564102564%;
+  }
   .row-fluid .span12 {
     width: 100%;
     *width: 99.94680851063829%;
@@ -453,6 +474,7 @@
   }
   [class*="span"] {
     float: left;
+    min-height: 1px;
     margin-left: 20px;
   }
   .container,
@@ -560,6 +582,9 @@
   .row-fluid [class*="span"]:first-child {
     margin-left: 0;
   }
+  .row-fluid .controls-row [class*="span"] + [class*="span"] {
+    margin-left: 2.7624309392265194%;
+  }
   .row-fluid .span12 {
     width: 100%;
     *width: 99.94680851063829%;
@@ -780,7 +805,8 @@
     padding-left: 20px;
   }
   .navbar-fixed-top,
-  .navbar-fixed-bottom {
+  .navbar-fixed-bottom,
+  .navbar-static-top {
     margin-right: -20px;
     margin-left: -20px;
   }
@@ -811,11 +837,15 @@
     margin-left: 0;
   }
   [class*="span"],
+  .uneditable-input[class*="span"],
   .row-fluid [class*="span"] {
     display: block;
     float: none;
-    width: auto;
+    width: 100%;
     margin-left: 0;
+    -webkit-box-sizing: border-box;
+       -moz-box-sizing: border-box;
+            box-sizing: border-box;
   }
   .span12,
   .row-fluid .span12 {
@@ -824,6 +854,9 @@
        -moz-box-sizing: border-box;
             box-sizing: border-box;
   }
+  .row-fluid [class*="offset"]:first-child {
+    margin-left: 0;
+  }
   .input-large,
   .input-xlarge,
   .input-xxlarge,
@@ -845,6 +878,9 @@
     display: inline-block;
     width: auto;
   }
+  .controls-row [class*="span"] + [class*="span"] {
+    margin-left: 0;
+  }
   .modal {
     position: fixed;
     top: 20px;
@@ -853,8 +889,11 @@
     width: auto;
     margin: 0;
   }
+  .modal.fade {
+    top: -100px;
+  }
   .modal.fade.in {
-    top: auto;
+    top: 20px;
   }
 }
 
@@ -870,7 +909,7 @@
   input[type="radio"] {
     border: 1px solid #ccc;
   }
-  .form-horizontal .control-group > label {
+  .form-horizontal .control-label {
     float: none;
     width: auto;
     padding-top: 0;
@@ -886,6 +925,16 @@
     padding-right: 10px;
     padding-left: 10px;
   }
+  .media .pull-left,
+  .media .pull-right {
+    display: block;
+    float: none;
+    margin-bottom: 10px;
+  }
+  .media-object {
+    margin-right: 0;
+    margin-left: 0;
+  }
   .modal {
     top: 10px;
     right: 10px;
@@ -944,14 +993,14 @@
     display: none;
   }
   .nav-collapse .nav .nav-header {
-    color: #555555;
+    color: #777777;
     text-shadow: none;
   }
   .nav-collapse .nav > li > a,
   .nav-collapse .dropdown-menu a {
     padding: 9px 15px;
     font-weight: bold;
-    color: #555555;
+    color: #777777;
     -webkit-border-radius: 3px;
        -moz-border-radius: 3px;
             border-radius: 3px;
@@ -967,11 +1016,19 @@
     margin-bottom: 2px;
   }
   .nav-collapse .nav > li > a:hover,
-  .nav-collapse .dropdown-menu a:hover {
+  .nav-collapse .nav > li > a:focus,
+  .nav-collapse .dropdown-menu a:hover,
+  .nav-collapse .dropdown-menu a:focus {
     background-color: #f2f2f2;
   }
+  .navbar-inverse .nav-collapse .nav > li > a,
+  .navbar-inverse .nav-collapse .dropdown-menu a {
+    color: #999999;
+  }
   .navbar-inverse .nav-collapse .nav > li > a:hover,
-  .navbar-inverse .nav-collapse .dropdown-menu a:hover {
+  .navbar-inverse .nav-collapse .nav > li > a:focus,
+  .navbar-inverse .nav-collapse .dropdown-menu a:hover,
+  .navbar-inverse .nav-collapse .dropdown-menu a:focus {
     background-color: #111111;
   }
   .nav-collapse.in .btn-group {
@@ -982,7 +1039,7 @@
     position: static;
     top: auto;
     left: auto;
-    display: block;
+    display: none;
     float: none;
     max-width: none;
     padding: 0;
@@ -996,6 +1053,9 @@
        -moz-box-shadow: none;
             box-shadow: none;
   }
+  .nav-collapse .open > .dropdown-menu {
+    display: block;
+  }
   .nav-collapse .dropdown-menu:before,
   .nav-collapse .dropdown-menu:after {
     display: none;
@@ -1003,6 +1063,10 @@
   .nav-collapse .dropdown-menu .divider {
     display: none;
   }
+  .nav-collapse .nav > li > .dropdown-menu:before,
+  .nav-collapse .nav > li > .dropdown-menu:after {
+    display: none;
+  }
   .nav-collapse .navbar-form,
   .nav-collapse .navbar-search {
     float: none;
@@ -1014,6 +1078,11 @@
        -moz-box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.1), 0 1px 0 rgba(255, 255, 255, 0.1);
             box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.1), 0 1px 0 rgba(255, 255, 255, 0.1);
   }
+  .navbar-inverse .nav-collapse .navbar-form,
+  .navbar-inverse .nav-collapse .navbar-search {
+    border-top-color: #111111;
+    border-bottom-color: #111111;
+  }
   .navbar .nav-collapse .nav.pull-right {
     float: none;
     margin-left: 0;

inst/www/shared/datatables/css/DT_bootstrap.css

@@ -0,0 +1,123 @@
+
+div.dataTables_length label {
+	float: left;
+	text-align: left;
+}
+
+div.dataTables_length select {
+	width: 75px;
+}
+
+div.dataTables_filter label {
+	float: right;
+}
+
+div.dataTables_info {
+	padding-top: 8px;
+}
+
+div.dataTables_paginate {
+	float: right;
+	margin: 0;
+}
+
+table.table {
+	clear: both;
+	margin-bottom: 6px !important;
+	max-width: none !important;
+}
+
+table.table thead .sorting,
+table.table thead .sorting_asc,
+table.table thead .sorting_desc,
+table.table thead .sorting_asc_disabled,
+table.table thead .sorting_desc_disabled {
+	cursor: pointer;
+	*cursor: hand;
+}
+
+table.table thead .sorting { background: url('images/sort_both.png') no-repeat center right; }
+table.table thead .sorting_asc { background: url('images/sort_asc.png') no-repeat center right; }
+table.table thead .sorting_desc { background: url('images/sort_desc.png') no-repeat center right; }
+
+table.table thead .sorting_asc_disabled { background: url('images/sort_asc_disabled.png') no-repeat center right; }
+table.table thead .sorting_desc_disabled { background: url('images/sort_desc_disabled.png') no-repeat center right; }
+
+table.dataTable th:active {
+	outline: none;
+}
+
+table.dataTable tr.odd td.sorting_1 { background-color: #D3D6FF; }
+table.dataTable tr.odd td.sorting_2 { background-color: #DADCFF; }
+table.dataTable tr.odd td.sorting_3 { background-color: #E0E2FF; }
+table.dataTable tr.even td.sorting_1 { background-color: #EAEBFF; }
+table.dataTable tr.even td.sorting_2 { background-color: #F2F3FF; }
+table.dataTable tr.even td.sorting_3 { background-color: #F9F9FF; }
+
+/* Scrolling */
+div.dataTables_scrollHead table {
+	margin-bottom: 0 !important;
+	border-bottom-left-radius: 0;
+	border-bottom-right-radius: 0;
+}
+
+div.dataTables_scrollHead table thead tr:last-child th:first-child,
+div.dataTables_scrollHead table thead tr:last-child td:first-child {
+	border-bottom-left-radius: 0 !important;
+	border-bottom-right-radius: 0 !important;
+}
+
+div.dataTables_scrollBody table {
+	border-top: none;
+	margin-bottom: 0 !important;
+}
+
+div.dataTables_scrollBody tbody tr:first-child th,
+div.dataTables_scrollBody tbody tr:first-child td {
+	border-top: none;
+}
+
+div.dataTables_scrollFoot table {
+	border-top: none;
+}
+
+/* Active rows */
+
+.table tbody tr.active td,
+.table tbody tr.active th {
+	background-color: #08C;
+	color: white;
+}
+
+.table tbody tr.active:hover td,
+.table tbody tr.active:hover th {
+	background-color: #0075b0 !important;
+}
+
+.table-striped tbody tr.active:nth-child(odd) td,
+.table-striped tbody tr.active:nth-child(odd) th {
+	background-color: #017ebc;
+}
+
+/* Processing indicator */
+
+.dataTables_processing {
+	position: absolute;
+	top: 50%;
+	left: 50%;
+	width: 250px;
+	height: 30px;
+	margin-left: -125px;
+	margin-top: -15px;
+	padding: 14px 0 2px 0;
+	border: 1px solid #ddd;
+	text-align: center;
+	color: #999;
+	font-size: 14px;
+	background-color: white;
+}
+
+/* Search boxes in the footer */
+table tfoot input {
+  width: 100%;
+}

inst/www/shared/datatables/js/DT_bootstrap.js

@@ -0,0 +1,109 @@
+/* Set the defaults for DataTables initialisation */
+$.extend( true, $.fn.dataTable.defaults, {
+	"sDom": "<'row-fluid'<'span6'l><'span6'f>r>t<'row-fluid'<'span6'i><'span6'p>>",
+	"sPaginationType": "bootstrap",
+	"oLanguage": {
+		"sLengthMenu": "_MENU_ records per page"
+	}
+} );
+
+
+/* Default class modification */
+$.extend( $.fn.dataTableExt.oStdClasses, {
+	"sWrapper": "dataTables_wrapper form-inline"
+} );
+
+
+/* API method to get paging information */
+$.fn.dataTableExt.oApi.fnPagingInfo = function ( oSettings )
+{
+	return {
+		"iStart":         oSettings._iDisplayStart,
+		"iEnd":           oSettings.fnDisplayEnd(),
+		"iLength":        oSettings._iDisplayLength,
+		"iTotal":         oSettings.fnRecordsTotal(),
+		"iFilteredTotal": oSettings.fnRecordsDisplay(),
+		"iPage":          oSettings._iDisplayLength === -1 ?
+			0 : Math.ceil( oSettings._iDisplayStart / oSettings._iDisplayLength ),
+		"iTotalPages":    oSettings._iDisplayLength === -1 ?
+			0 : Math.ceil( oSettings.fnRecordsDisplay() / oSettings._iDisplayLength )
+	};
+};
+
+
+/* Bootstrap style pagination control */
+$.extend( $.fn.dataTableExt.oPagination, {
+	"bootstrap": {
+		"fnInit": function( oSettings, nPaging, fnDraw ) {
+			var oLang = oSettings.oLanguage.oPaginate;
+			var fnClickHandler = function ( e ) {
+				e.preventDefault();
+				if ( oSettings.oApi._fnPageChange(oSettings, e.data.action) ) {
+					fnDraw( oSettings );
+				}
+			};
+
+			$(nPaging).addClass('pagination').append(
+				'<ul>'+
+					'<li class="prev disabled"><a href="#">&larr; '+oLang.sPrevious+'</a></li>'+
+					'<li class="next disabled"><a href="#">'+oLang.sNext+' &rarr; </a></li>'+
+				'</ul>'
+			);
+			var els = $('a', nPaging);
+			$(els[0]).bind( 'click.DT', { action: "previous" }, fnClickHandler );
+			$(els[1]).bind( 'click.DT', { action: "next" }, fnClickHandler );
+		},
+
+		"fnUpdate": function ( oSettings, fnDraw ) {
+			var iListLength = 5;
+			var oPaging = oSettings.oInstance.fnPagingInfo();
+			var an = oSettings.aanFeatures.p;
+			var i, ien, j, sClass, iStart, iEnd, iHalf=Math.floor(iListLength/2);
+
+			if ( oPaging.iTotalPages < iListLength) {
+				iStart = 1;
+				iEnd = oPaging.iTotalPages;
+			}
+			else if ( oPaging.iPage <= iHalf ) {
+				iStart = 1;
+				iEnd = iListLength;
+			} else if ( oPaging.iPage >= (oPaging.iTotalPages-iHalf) ) {
+				iStart = oPaging.iTotalPages - iListLength + 1;
+				iEnd = oPaging.iTotalPages;
+			} else {
+				iStart = oPaging.iPage - iHalf + 1;
+				iEnd = iStart + iListLength - 1;
+			}
+
+			for ( i=0, ien=an.length ; i<ien ; i++ ) {
+				// Remove the middle elements
+				$('li:gt(0)', an[i]).filter(':not(:last)').remove();
+
+				// Add the new list items and their event handlers
+				for ( j=iStart ; j<=iEnd ; j++ ) {
+					sClass = (j==oPaging.iPage+1) ? 'class="active"' : '';
+					$('<li '+sClass+'><a href="#">'+j+'</a></li>')
+						.insertBefore( $('li:last', an[i])[0] )
+						.bind('click', function (e) {
+							e.preventDefault();
+							oSettings._iDisplayStart = (parseInt($('a', this).text(),10)-1) * oPaging.iLength;
+							fnDraw( oSettings );
+						} );
+				}
+
+				// Add / remove disabled classes from the static elements
+				if ( oPaging.iPage === 0 ) {
+					$('li:first', an[i]).addClass('disabled');
+				} else {
+					$('li:first', an[i]).removeClass('disabled');
+				}
+
+				if ( oPaging.iPage === oPaging.iTotalPages-1 || oPaging.iTotalPages === 0 ) {
+					$('li:last', an[i]).addClass('disabled');
+				} else {
+					$('li:last', an[i]).removeClass('disabled');
+				}
+			}
+		}
+	}
+} );

inst/www/shared/datatables/js/jquery.dataTables.min.js

@@ -0,0 +1,155 @@
+/*
+ * File:        jquery.dataTables.min.js
+ * Version:     1.9.4
+ * Author:      Allan Jardine (www.sprymedia.co.uk)
+ * Info:        www.datatables.net
+ * 
+ * Copyright 2008-2012 Allan Jardine, all rights reserved.
+ *
+ * This source file is free software, under either the GPL v2 license or a
+ * BSD style license, available at:
+ *   http://datatables.net/license_gpl2
+ *   http://datatables.net/license_bsd
+ * 
+ * This source file is distributed in the hope that it will be useful, but 
+ * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY 
+ * or FITNESS FOR A PARTICULAR PURPOSE. See the license files for details.
+ */
+(function(X,l,n){var L=function(h){var j=function(e){function o(a,b){var c=j.defaults.columns,d=a.aoColumns.length,c=h.extend({},j.models.oColumn,c,{sSortingClass:a.oClasses.sSortable,sSortingClassJUI:a.oClasses.sSortJUI,nTh:b?b:l.createElement("th"),sTitle:c.sTitle?c.sTitle:b?b.innerHTML:"",aDataSort:c.aDataSort?c.aDataSort:[d],mData:c.mData?c.oDefaults:d});a.aoColumns.push(c);if(a.aoPreSearchCols[d]===n||null===a.aoPreSearchCols[d])a.aoPreSearchCols[d]=h.extend({},j.models.oSearch);else if(c=a.aoPreSearchCols[d],
+c.bRegex===n&&(c.bRegex=!0),c.bSmart===n&&(c.bSmart=!0),c.bCaseInsensitive===n)c.bCaseInsensitive=!0;m(a,d,null)}function m(a,b,c){var d=a.aoColumns[b];c!==n&&null!==c&&(c.mDataProp&&!c.mData&&(c.mData=c.mDataProp),c.sType!==n&&(d.sType=c.sType,d._bAutoType=!1),h.extend(d,c),p(d,c,"sWidth","sWidthOrig"),c.iDataSort!==n&&(d.aDataSort=[c.iDataSort]),p(d,c,"aDataSort"));var i=d.mRender?Q(d.mRender):null,f=Q(d.mData);d.fnGetData=function(a,b){var c=f(a,b);return d.mRender&&b&&""!==b?i(c,b,a):c};d.fnSetData=
+L(d.mData);a.oFeatures.bSort||(d.bSortable=!1);!d.bSortable||-1==h.inArray("asc",d.asSorting)&&-1==h.inArray("desc",d.asSorting)?(d.sSortingClass=a.oClasses.sSortableNone,d.sSortingClassJUI=""):-1==h.inArray("asc",d.asSorting)&&-1==h.inArray("desc",d.asSorting)?(d.sSortingClass=a.oClasses.sSortable,d.sSortingClassJUI=a.oClasses.sSortJUI):-1!=h.inArray("asc",d.asSorting)&&-1==h.inArray("desc",d.asSorting)?(d.sSortingClass=a.oClasses.sSortableAsc,d.sSortingClassJUI=a.oClasses.sSortJUIAscAllowed):-1==
+h.inArray("asc",d.asSorting)&&-1!=h.inArray("desc",d.asSorting)&&(d.sSortingClass=a.oClasses.sSortableDesc,d.sSortingClassJUI=a.oClasses.sSortJUIDescAllowed)}function k(a){if(!1===a.oFeatures.bAutoWidth)return!1;da(a);for(var b=0,c=a.aoColumns.length;b<c;b++)a.aoColumns[b].nTh.style.width=a.aoColumns[b].sWidth}function G(a,b){var c=r(a,"bVisible");return"number"===typeof c[b]?c[b]:null}function R(a,b){var c=r(a,"bVisible"),c=h.inArray(b,c);return-1!==c?c:null}function t(a){return r(a,"bVisible").length}
+function r(a,b){var c=[];h.map(a.aoColumns,function(a,i){a[b]&&c.push(i)});return c}function B(a){for(var b=j.ext.aTypes,c=b.length,d=0;d<c;d++){var i=b[d](a);if(null!==i)return i}return"string"}function u(a,b){for(var c=b.split(","),d=[],i=0,f=a.aoColumns.length;i<f;i++)for(var g=0;g<f;g++)if(a.aoColumns[i].sName==c[g]){d.push(g);break}return d}function M(a){for(var b="",c=0,d=a.aoColumns.length;c<d;c++)b+=a.aoColumns[c].sName+",";return b.length==d?"":b.slice(0,-1)}function ta(a,b,c,d){var i,f,
+g,e,w;if(b)for(i=b.length-1;0<=i;i--){var j=b[i].aTargets;h.isArray(j)||D(a,1,"aTargets must be an array of targets, not a "+typeof j);f=0;for(g=j.length;f<g;f++)if("number"===typeof j[f]&&0<=j[f]){for(;a.aoColumns.length<=j[f];)o(a);d(j[f],b[i])}else if("number"===typeof j[f]&&0>j[f])d(a.aoColumns.length+j[f],b[i]);else if("string"===typeof j[f]){e=0;for(w=a.aoColumns.length;e<w;e++)("_all"==j[f]||h(a.aoColumns[e].nTh).hasClass(j[f]))&&d(e,b[i])}}if(c){i=0;for(a=c.length;i<a;i++)d(i,c[i])}}function H(a,
+b){var c;c=h.isArray(b)?b.slice():h.extend(!0,{},b);var d=a.aoData.length,i=h.extend(!0,{},j.models.oRow);i._aData=c;a.aoData.push(i);for(var f,i=0,g=a.aoColumns.length;i<g;i++)c=a.aoColumns[i],"function"===typeof c.fnRender&&c.bUseRendered&&null!==c.mData?F(a,d,i,S(a,d,i)):F(a,d,i,v(a,d,i)),c._bAutoType&&"string"!=c.sType&&(f=v(a,d,i,"type"),null!==f&&""!==f&&(f=B(f),null===c.sType?c.sType=f:c.sType!=f&&"html"!=c.sType&&(c.sType="string")));a.aiDisplayMaster.push(d);a.oFeatures.bDeferRender||ea(a,
+d);return d}function ua(a){var b,c,d,i,f,g,e;if(a.bDeferLoading||null===a.sAjaxSource)for(b=a.nTBody.firstChild;b;){if("TR"==b.nodeName.toUpperCase()){c=a.aoData.length;b._DT_RowIndex=c;a.aoData.push(h.extend(!0,{},j.models.oRow,{nTr:b}));a.aiDisplayMaster.push(c);f=b.firstChild;for(d=0;f;){g=f.nodeName.toUpperCase();if("TD"==g||"TH"==g)F(a,c,d,h.trim(f.innerHTML)),d++;f=f.nextSibling}}b=b.nextSibling}i=T(a);d=[];b=0;for(c=i.length;b<c;b++)for(f=i[b].firstChild;f;)g=f.nodeName.toUpperCase(),("TD"==
+g||"TH"==g)&&d.push(f),f=f.nextSibling;c=0;for(i=a.aoColumns.length;c<i;c++){e=a.aoColumns[c];null===e.sTitle&&(e.sTitle=e.nTh.innerHTML);var w=e._bAutoType,o="function"===typeof e.fnRender,k=null!==e.sClass,n=e.bVisible,m,p;if(w||o||k||!n){g=0;for(b=a.aoData.length;g<b;g++)f=a.aoData[g],m=d[g*i+c],w&&"string"!=e.sType&&(p=v(a,g,c,"type"),""!==p&&(p=B(p),null===e.sType?e.sType=p:e.sType!=p&&"html"!=e.sType&&(e.sType="string"))),e.mRender?m.innerHTML=v(a,g,c,"display"):e.mData!==c&&(m.innerHTML=v(a,
+g,c,"display")),o&&(p=S(a,g,c),m.innerHTML=p,e.bUseRendered&&F(a,g,c,p)),k&&(m.className+=" "+e.sClass),n?f._anHidden[c]=null:(f._anHidden[c]=m,m.parentNode.removeChild(m)),e.fnCreatedCell&&e.fnCreatedCell.call(a.oInstance,m,v(a,g,c,"display"),f._aData,g,c)}}if(0!==a.aoRowCreatedCallback.length){b=0;for(c=a.aoData.length;b<c;b++)f=a.aoData[b],A(a,"aoRowCreatedCallback",null,[f.nTr,f._aData,b])}}function I(a,b){return b._DT_RowIndex!==n?b._DT_RowIndex:null}function fa(a,b,c){for(var b=J(a,b),d=0,a=
+a.aoColumns.length;d<a;d++)if(b[d]===c)return d;return-1}function Y(a,b,c,d){for(var i=[],f=0,g=d.length;f<g;f++)i.push(v(a,b,d[f],c));return i}function v(a,b,c,d){var i=a.aoColumns[c];if((c=i.fnGetData(a.aoData[b]._aData,d))===n)return a.iDrawError!=a.iDraw&&null===i.sDefaultContent&&(D(a,0,"Requested unknown parameter "+("function"==typeof i.mData?"{mData function}":"'"+i.mData+"'")+" from the data source for row "+b),a.iDrawError=a.iDraw),i.sDefaultContent;if(null===c&&null!==i.sDefaultContent)c=
+i.sDefaultContent;else if("function"===typeof c)return c();return"display"==d&&null===c?"":c}function F(a,b,c,d){a.aoColumns[c].fnSetData(a.aoData[b]._aData,d)}function Q(a){if(null===a)return function(){return null};if("function"===typeof a)return function(b,d,i){return a(b,d,i)};if("string"===typeof a&&(-1!==a.indexOf(".")||-1!==a.indexOf("["))){var b=function(a,d,i){var f=i.split("."),g;if(""!==i){var e=0;for(g=f.length;e<g;e++){if(i=f[e].match(U)){f[e]=f[e].replace(U,"");""!==f[e]&&(a=a[f[e]]);
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+a.aiDisplayMaster.length);a.aiDisplay.splice(0,a.aiDisplay.length);y(a)}function ha(a,b){for(var c=-1,d=0,i=a.length;d<i;d++)a[d]==b?c=d:a[d]>b&&a[d]--; -1!=c&&a.splice(c,1)}function S(a,b,c){var d=a.aoColumns[c];return d.fnRender({iDataRow:b,iDataColumn:c,oSettings:a,aData:a.aoData[b]._aData,mDataProp:d.mData},v(a,b,c,"display"))}function ea(a,b){var c=a.aoData[b],d;if(null===c.nTr){c.nTr=l.createElement("tr");c.nTr._DT_RowIndex=b;c._aData.DT_RowId&&(c.nTr.id=c._aData.DT_RowId);c._aData.DT_RowClass&&
+(c.nTr.className=c._aData.DT_RowClass);for(var i=0,f=a.aoColumns.length;i<f;i++){var g=a.aoColumns[i];d=l.createElement(g.sCellType);d.innerHTML="function"===typeof g.fnRender&&(!g.bUseRendered||null===g.mData)?S(a,b,i):v(a,b,i,"display");null!==g.sClass&&(d.className=g.sClass);g.bVisible?(c.nTr.appendChild(d),c._anHidden[i]=null):c._anHidden[i]=d;g.fnCreatedCell&&g.fnCreatedCell.call(a.oInstance,d,v(a,b,i,"display"),c._aData,b,i)}A(a,"aoRowCreatedCallback",null,[c.nTr,c._aData,b])}}function va(a){var b,
+c,d;if(0!==h("th, td",a.nTHead).length){b=0;for(d=a.aoColumns.length;b<d;b++)if(c=a.aoColumns[b].nTh,c.setAttribute("role","columnheader"),a.aoColumns[b].bSortable&&(c.setAttribute("tabindex",a.iTabIndex),c.setAttribute("aria-controls",a.sTableId)),null!==a.aoColumns[b].sClass&&h(c).addClass(a.aoColumns[b].sClass),a.aoColumns[b].sTitle!=c.innerHTML)c.innerHTML=a.aoColumns[b].sTitle}else{var i=l.createElement("tr");b=0;for(d=a.aoColumns.length;b<d;b++)c=a.aoColumns[b].nTh,c.innerHTML=a.aoColumns[b].sTitle,
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+asStripeClasses:null,asDestroyStripes:[],sDestroyWidth:0,aoRowCallback:[],aoHeaderCallback:[],aoFooterCallback:[],aoDrawCallback:[],aoRowCreatedCallback:[],aoPreDrawCallback:[],aoInitComplete:[],aoStateSaveParams:[],aoStateLoadParams:[],aoStateLoaded:[],sTableId:"",nTable:null,nTHead:null,nTFoot:null,nTBody:null,nTableWrapper:null,bDeferLoading:!1,bInitialised:!1,aoOpenRows:[],sDom:null,sPaginationType:"two_button",iCookieDuration:0,sCookiePrefix:"",fnCookieCallback:null,aoStateSave:[],aoStateLoad:[],
+oLoadedState:null,sAjaxSource:null,sAjaxDataProp:null,bAjaxDataGet:!0,jqXHR:null,fnServerData:null,aoServerParams:[],sServerMethod:null,fnFormatNumber:null,aLengthMenu:null,iDraw:0,bDrawing:!1,iDrawError:-1,_iDisplayLength:10,_iDisplayStart:0,_iDisplayEnd:10,_iRecordsTotal:0,_iRecordsDisplay:0,bJUI:null,oClasses:{},bFiltered:!1,bSorted:!1,bSortCellsTop:null,oInit:null,aoDestroyCallback:[],fnRecordsTotal:function(){return this.oFeatures.bServerSide?parseInt(this._iRecordsTotal,10):this.aiDisplayMaster.length},
+fnRecordsDisplay:function(){return this.oFeatures.bServerSide?parseInt(this._iRecordsDisplay,10):this.aiDisplay.length},fnDisplayEnd:function(){return this.oFeatures.bServerSide?!1===this.oFeatures.bPaginate||-1==this._iDisplayLength?this._iDisplayStart+this.aiDisplay.length:Math.min(this._iDisplayStart+this._iDisplayLength,this._iRecordsDisplay):this._iDisplayEnd},oInstance:null,sInstance:null,iTabIndex:0,nScrollHead:null,nScrollFoot:null};j.ext=h.extend(!0,{},j.models.ext);h.extend(j.ext.oStdClasses,
+{sTable:"dataTable",sPagePrevEnabled:"paginate_enabled_previous",sPagePrevDisabled:"paginate_disabled_previous",sPageNextEnabled:"paginate_enabled_next",sPageNextDisabled:"paginate_disabled_next",sPageJUINext:"",sPageJUIPrev:"",sPageButton:"paginate_button",sPageButtonActive:"paginate_active",sPageButtonStaticDisabled:"paginate_button paginate_button_disabled",sPageFirst:"first",sPagePrevious:"previous",sPageNext:"next",sPageLast:"last",sStripeOdd:"odd",sStripeEven:"even",sRowEmpty:"dataTables_empty",
+sWrapper:"dataTables_wrapper",sFilter:"dataTables_filter",sInfo:"dataTables_info",sPaging:"dataTables_paginate paging_",sLength:"dataTables_length",sProcessing:"dataTables_processing",sSortAsc:"sorting_asc",sSortDesc:"sorting_desc",sSortable:"sorting",sSortableAsc:"sorting_asc_disabled",sSortableDesc:"sorting_desc_disabled",sSortableNone:"sorting_disabled",sSortColumn:"sorting_",sSortJUIAsc:"",sSortJUIDesc:"",sSortJUI:"",sSortJUIAscAllowed:"",sSortJUIDescAllowed:"",sSortJUIWrapper:"",sSortIcon:"",
+sScrollWrapper:"dataTables_scroll",sScrollHead:"dataTables_scrollHead",sScrollHeadInner:"dataTables_scrollHeadInner",sScrollBody:"dataTables_scrollBody",sScrollFoot:"dataTables_scrollFoot",sScrollFootInner:"dataTables_scrollFootInner",sFooterTH:"",sJUIHeader:"",sJUIFooter:""});h.extend(j.ext.oJUIClasses,j.ext.oStdClasses,{sPagePrevEnabled:"fg-button ui-button ui-state-default ui-corner-left",sPagePrevDisabled:"fg-button ui-button ui-state-default ui-corner-left ui-state-disabled",sPageNextEnabled:"fg-button ui-button ui-state-default ui-corner-right",
+sPageNextDisabled:"fg-button ui-button ui-state-default ui-corner-right ui-state-disabled",sPageJUINext:"ui-icon ui-icon-circle-arrow-e",sPageJUIPrev:"ui-icon ui-icon-circle-arrow-w",sPageButton:"fg-button ui-button ui-state-default",sPageButtonActive:"fg-button ui-button ui-state-default ui-state-disabled",sPageButtonStaticDisabled:"fg-button ui-button ui-state-default ui-state-disabled",sPageFirst:"first ui-corner-tl ui-corner-bl",sPageLast:"last ui-corner-tr ui-corner-br",sPaging:"dataTables_paginate fg-buttonset ui-buttonset fg-buttonset-multi ui-buttonset-multi paging_",
+sSortAsc:"ui-state-default",sSortDesc:"ui-state-default",sSortable:"ui-state-default",sSortableAsc:"ui-state-default",sSortableDesc:"ui-state-default",sSortableNone:"ui-state-default",sSortJUIAsc:"css_right ui-icon ui-icon-triangle-1-n",sSortJUIDesc:"css_right ui-icon ui-icon-triangle-1-s",sSortJUI:"css_right ui-icon ui-icon-carat-2-n-s",sSortJUIAscAllowed:"css_right ui-icon ui-icon-carat-1-n",sSortJUIDescAllowed:"css_right ui-icon ui-icon-carat-1-s",sSortJUIWrapper:"DataTables_sort_wrapper",sSortIcon:"DataTables_sort_icon",
+sScrollHead:"dataTables_scrollHead ui-state-default",sScrollFoot:"dataTables_scrollFoot ui-state-default",sFooterTH:"ui-state-default",sJUIHeader:"fg-toolbar ui-toolbar ui-widget-header ui-corner-tl ui-corner-tr ui-helper-clearfix",sJUIFooter:"fg-toolbar ui-toolbar ui-widget-header ui-corner-bl ui-corner-br ui-helper-clearfix"});h.extend(j.ext.oPagination,{two_button:{fnInit:function(e,j,m){var k=e.oLanguage.oPaginate,n=function(h){e.oApi._fnPageChange(e,h.data.action)&&m(e)},k=!e.bJUI?'<a class="'+
+e.oClasses.sPagePrevDisabled+'" tabindex="'+e.iTabIndex+'" role="button">'+k.sPrevious+'</a><a class="'+e.oClasses.sPageNextDisabled+'" tabindex="'+e.iTabIndex+'" role="button">'+k.sNext+"</a>":'<a class="'+e.oClasses.sPagePrevDisabled+'" tabindex="'+e.iTabIndex+'" role="button"><span class="'+e.oClasses.sPageJUIPrev+'"></span></a><a class="'+e.oClasses.sPageNextDisabled+'" tabindex="'+e.iTabIndex+'" role="button"><span class="'+e.oClasses.sPageJUINext+'"></span></a>';h(j).append(k);var l=h("a",j),
+k=l[0],l=l[1];e.oApi._fnBindAction(k,{action:"previous"},n);e.oApi._fnBindAction(l,{action:"next"},n);e.aanFeatures.p||(j.id=e.sTableId+"_paginate",k.id=e.sTableId+"_previous",l.id=e.sTableId+"_next",k.setAttribute("aria-controls",e.sTableId),l.setAttribute("aria-controls",e.sTableId))},fnUpdate:function(e){if(e.aanFeatures.p)for(var h=e.oClasses,j=e.aanFeatures.p,k,l=0,n=j.length;l<n;l++)if(k=j[l].firstChild)k.className=0===e._iDisplayStart?h.sPagePrevDisabled:h.sPagePrevEnabled,k=k.nextSibling,
+k.className=e.fnDisplayEnd()==e.fnRecordsDisplay()?h.sPageNextDisabled:h.sPageNextEnabled}},iFullNumbersShowPages:5,full_numbers:{fnInit:function(e,j,m){var k=e.oLanguage.oPaginate,l=e.oClasses,n=function(h){e.oApi._fnPageChange(e,h.data.action)&&m(e)};h(j).append('<a  tabindex="'+e.iTabIndex+'" class="'+l.sPageButton+" "+l.sPageFirst+'">'+k.sFirst+'</a><a  tabindex="'+e.iTabIndex+'" class="'+l.sPageButton+" "+l.sPagePrevious+'">'+k.sPrevious+'</a><span></span><a tabindex="'+e.iTabIndex+'" class="'+
+l.sPageButton+" "+l.sPageNext+'">'+k.sNext+'</a><a tabindex="'+e.iTabIndex+'" class="'+l.sPageButton+" "+l.sPageLast+'">'+k.sLast+"</a>");var t=h("a",j),k=t[0],l=t[1],r=t[2],t=t[3];e.oApi._fnBindAction(k,{action:"first"},n);e.oApi._fnBindAction(l,{action:"previous"},n);e.oApi._fnBindAction(r,{action:"next"},n);e.oApi._fnBindAction(t,{action:"last"},n);e.aanFeatures.p||(j.id=e.sTableId+"_paginate",k.id=e.sTableId+"_first",l.id=e.sTableId+"_previous",r.id=e.sTableId+"_next",t.id=e.sTableId+"_last")},
+fnUpdate:function(e,o){if(e.aanFeatures.p){var m=j.ext.oPagination.iFullNumbersShowPages,k=Math.floor(m/2),l=Math.ceil(e.fnRecordsDisplay()/e._iDisplayLength),n=Math.ceil(e._iDisplayStart/e._iDisplayLength)+1,t="",r,B=e.oClasses,u,M=e.aanFeatures.p,L=function(h){e.oApi._fnBindAction(this,{page:h+r-1},function(h){e.oApi._fnPageChange(e,h.data.page);o(e);h.preventDefault()})};-1===e._iDisplayLength?n=k=r=1:l<m?(r=1,k=l):n<=k?(r=1,k=m):n>=l-k?(r=l-m+1,k=l):(r=n-Math.ceil(m/2)+1,k=r+m-1);for(m=r;m<=k;m++)t+=
+n!==m?'<a tabindex="'+e.iTabIndex+'" class="'+B.sPageButton+'">'+e.fnFormatNumber(m)+"</a>":'<a tabindex="'+e.iTabIndex+'" class="'+B.sPageButtonActive+'">'+e.fnFormatNumber(m)+"</a>";m=0;for(k=M.length;m<k;m++)u=M[m],u.hasChildNodes()&&(h("span:eq(0)",u).html(t).children("a").each(L),u=u.getElementsByTagName("a"),u=[u[0],u[1],u[u.length-2],u[u.length-1]],h(u).removeClass(B.sPageButton+" "+B.sPageButtonActive+" "+B.sPageButtonStaticDisabled),h([u[0],u[1]]).addClass(1==n?B.sPageButtonStaticDisabled:
+B.sPageButton),h([u[2],u[3]]).addClass(0===l||n===l||-1===e._iDisplayLength?B.sPageButtonStaticDisabled:B.sPageButton))}}}});h.extend(j.ext.oSort,{"string-pre":function(e){"string"!=typeof e&&(e=null!==e&&e.toString?e.toString():"");return e.toLowerCase()},"string-asc":function(e,h){return e<h?-1:e>h?1:0},"string-desc":function(e,h){return e<h?1:e>h?-1:0},"html-pre":function(e){return e.replace(/<.*?>/g,"").toLowerCase()},"html-asc":function(e,h){return e<h?-1:e>h?1:0},"html-desc":function(e,h){return e<
+h?1:e>h?-1:0},"date-pre":function(e){e=Date.parse(e);if(isNaN(e)||""===e)e=Date.parse("01/01/1970 00:00:00");return e},"date-asc":function(e,h){return e-h},"date-desc":function(e,h){return h-e},"numeric-pre":function(e){return"-"==e||""===e?0:1*e},"numeric-asc":function(e,h){return e-h},"numeric-desc":function(e,h){return h-e}});h.extend(j.ext.aTypes,[function(e){if("number"===typeof e)return"numeric";if("string"!==typeof e)return null;var h,j=!1;h=e.charAt(0);if(-1=="0123456789-".indexOf(h))return null;
+for(var k=1;k<e.length;k++){h=e.charAt(k);if(-1=="0123456789.".indexOf(h))return null;if("."==h){if(j)return null;j=!0}}return"numeric"},function(e){var h=Date.parse(e);return null!==h&&!isNaN(h)||"string"===typeof e&&0===e.length?"date":null},function(e){return"string"===typeof e&&-1!=e.indexOf("<")&&-1!=e.indexOf(">")?"html":null}]);h.fn.DataTable=j;h.fn.dataTable=j;h.fn.dataTableSettings=j.settings;h.fn.dataTableExt=j.ext};"function"===typeof define&&define.amd?define(["jquery"],L):jQuery&&!jQuery.fn.dataTable&&
+L(jQuery)})(window,document);