More robust setInternet2 workaround

I first attempted to remove \code, but I couldn't figure out how to get the # in the URL to work right under both web-based help and PDF.

.Rbuildignore

@@ -0,0 +1,9 @@
+^\.Rproj\.user$
+^\.git$
+^examples$
+^README\.md$
+^shiny\.Rproj$
+^shiny\.sh$
+^shiny\.cmd$
+^run\.R$
+^\.gitignore$

.gitignore

@@ -1,4 +1,9 @@
-vendor/ruby
-\.bundle/
-\.DS_Store
+.DS_Store
 .Rproj.user
+.Rhistory
+.Rprofile
+*.o
+*.so
+/src-i386/
+/src-x86_64/
+README.html

DESCRIPTION

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+Package: shiny
+Type: Package
+Title: Web Application Framework for R
+Version: 0.1.8
+Date: 2012-10-26
+Author: RStudio, Inc.
+Maintainer: Joe Cheng <joe@rstudio.org>
+Description: Shiny makes it incredibly easy to build interactive web
+    applications with R. Automatic "reactive" binding between inputs and
+    outputs and extensive pre-built widgets make it possible to build
+    beautiful, responsive, and powerful applications with minimal effort.
+License: GPL-3
+Depends:
+    R (>= 2.14.1), websockets (>= 1.1.5)
+Imports:
+    stats,
+    tools,
+    utils,
+    datasets,
+    methods,
+    caTools,
+    RJSONIO,
+    xtable,
+    digest
+URL: https://github.com/rstudio/shiny, http://rstudio.github.com/shiny/tutorial
+BugReports: https://github.com/rstudio/shiny/issues
+Collate:
+    'map.R'
+    'random.R'
+    'timer.R'
+    'tags.R'
+    'react.R'
+    'reactives.R'
+    'fileupload.R'
+    'shiny.R'
+    'shinywrappers.R'
+    'shinyui.R'
+    'slider.R'
+    'bootstrap.R'

Gemfile

@@ -1,5 +0,0 @@
-source 'https://rubygems.org'
-
-gem 'em-websocket'
-gem 'eventmachine_httpserver'
-gem 'json'

Gemfile.lock

@@ -1,18 +0,0 @@
-GEM
-  remote: https://rubygems.org/
-  specs:
-    addressable (2.2.8)
-    em-websocket (0.3.6)
-      addressable (>= 2.1.1)
-      eventmachine (>= 0.12.9)
-    eventmachine (0.12.10)
-    eventmachine_httpserver (0.2.1)
-    json (1.7.3)
-
-PLATFORMS
-  ruby
-
-DEPENDENCIES
-  em-websocket
-  eventmachine_httpserver
-  json

NAMESPACE

@@ -0,0 +1,80 @@
+export(a)
+export(addResourcePath)
+export(animationOptions)
+export(bootstrapPage)
+export(br)
+export(checkboxGroupInput)
+export(checkboxInput)
+export(code)
+export(conditionalPanel)
+export(div)
+export(em)
+export(fileInput)
+export(h1)
+export(h2)
+export(h3)
+export(h4)
+export(h5)
+export(h6)
+export(headerPanel)
+export(helpText)
+export(HTML)
+export(htmlOutput)
+export(img)
+export(invalidateLater)
+export(mainPanel)
+export(numericInput)
+export(p)
+export(pageWithSidebar)
+export(plotOutput)
+export(pre)
+export(radioButtons)
+export(reactive)
+export(reactivePlot)
+export(reactivePrint)
+export(reactiveTable)
+export(reactiveText)
+export(reactiveTimer)
+export(reactiveUI)
+export(repeatable)
+export(runApp)
+export(runExample)
+export(runGist)
+export(selectInput)
+export(shinyServer)
+export(shinyUI)
+export(sidebarPanel)
+export(singleton)
+export(sliderInput)
+export(span)
+export(strong)
+export(submitButton)
+export(tableOutput)
+export(tabPanel)
+export(tabsetPanel)
+export(tag)
+export(tagAppendChild)
+export(tagList)
+export(tags)
+export(textInput)
+export(textOutput)
+export(uiOutput)
+export(verbatimTextOutput)
+export(wellPanel)
+import(caTools)
+import(digest)
+import(RJSONIO)
+import(websockets)
+import(xtable)
+S3method(as.character,shiny.tag)
+S3method(as.character,shiny.tag.list)
+S3method(as.list,reactvaluesreader)
+S3method(format,shiny.tag)
+S3method(format,shiny.tag.list)
+S3method(names,reactvaluesreader)
+S3method(print,shiny.tag)
+S3method(print,shiny.tag.list)
+S3method(reactive,default)
+S3method(reactive,"function")
+S3method("$",reactvaluesreader)
+S3method("$<-",shinyoutput)

NEWS

@@ -0,0 +1,78 @@
+shiny 0.1.8
+--------------------------------------------------------------------------------
+
+* Add `runGist` function for conveniently running a Shiny app that is published
+  on gist.github.com.
+* 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
+  layouts from scratch.
+
+
+shiny 0.1.7
+--------------------------------------------------------------------------------
+
+* Fix issue #26: Shiny.OutputBindings not correctly exported.
+* Add `repeatable` function for making easily repeatable versions of random
+  number generating functions.
+* Transcode JSON into UTF-8 (prevents non-ASCII reactivePrint values from
+  causing errors on Windows).
+
+
+shiny 0.1.6
+--------------------------------------------------------------------------------
+
+* Import package dependencies, instead of attaching them (with the exception of
+  websockets, which doesn't currently work unless attached).
+* conditionalPanel was animated, now it is not.
+* bindAll was not correctly sending initial values to the server; fixed.
+
+
+shiny 0.1.5
+--------------------------------------------------------------------------------
+
+* BREAKING CHANGE: JS APIs Shiny.bindInput and Shiny.bindOutput removed and
+  replaced with Shiny.bindAll; Shiny.unbindInput and Shiny.unbindOutput removed
+  and replaced with Shiny.unbindAll.
+* Add file upload support (currently only works with Chrome and Firefox). Use
+  a normal HTML file input, or call the `fileInput` UI function.
+* Shiny.unbindOutputs did not work, now it does.
+* Generally improved robustness of dynamic input/output bindings.
+* Add conditionalPanel UI function to allow showing/hiding UI based on a JS
+  expression; for example, whether an input is a particular value. Also works in
+  raw HTML (add the `data-display-if` attribute to the element that should be
+  shown/hidden).
+* htmlOutput (CSS class `shiny-html-output`) can contain inputs and outputs.
+
+
+shiny 0.1.4
+--------------------------------------------------------------------------------
+
+* Allow Bootstrap tabsets to act as reactive inputs; their value indicates which
+  tab is active
+* Upgrade to Bootstrap 2.1
+* Add `checkboxGroupInput` control, which presents a list of checkboxes and
+  returns a vector of the selected values
+* Add `addResourcePath`, intended for reusable component authors to access CSS,
+  JavaScript, image files, etc. from their package directories
+* Add Shiny.bindInputs(scope), .unbindInputs(scope), .bindOutputs(scope), and
+  .unbindOutputs(scope) JS API calls to allow dynamic binding/unbinding of HTML
+  elements
+
+
+shiny 0.1.3
+--------------------------------------------------------------------------------
+
+* Introduce Shiny.inputBindings.register JS API and InputBinding class, for
+  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)` 
+* Fix issue #10: Plots in tabsets not rendered
+
+
+shiny 0.1.2
+--------------------------------------------------------------------------------
+
+Initial private beta release!

R/bootstrap.R

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+#' Create a Twitter Bootstrap page
+#' 
+#' Create a Shiny UI page that loads the CSS and JavaScript for
+#' \href{http://getbootstrap.com}{Twitter Bootstrap}, and has no content in the
+#' page body (other than what you provide).
+#' 
+#' This function is primarily intended for users who are proficient in HTML/CSS,
+#' and know how to lay out pages in Bootstrap. Most users should use template
+#' functions like \code{\link{pageWithSidebar}}.
+#' 
+#' @param ... The contents of the document body.
+#' @return A UI defintion that can be passed to the \link{shinyUI} function.
+#' 
+#' @export
+bootstrapPage <- function(...) {
+  # required head tags for boostrap
+  importBootstrap <- function(min = TRUE, responsive = TRUE) {
+    
+    ext <- function(ext) {
+      ifelse(min, paste(".min", ext, sep=""), ext)
+    }
+    cssExt <- ext(".css")
+    jsExt = ext(".js")
+    bs <- "shared/bootstrap/"
+    
+    result <- tags$head(
+      tags$link(rel="stylesheet", 
+                type="text/css", 
+                href=paste(bs, "css/bootstrap", cssExt, sep="")),
+      
+      tags$script(src=paste(bs, "js/bootstrap", jsExt, sep=""))
+    )
+    
+    if (responsive) {
+      result <- tagAppendChild(
+        result, 
+        tags$meta(name="viewport", 
+                  content="width=device-width, initial-scale=1.0"))
+      result <- tagAppendChild(
+        result,
+        tags$link(rel="stylesheet", 
+                  type="text/css", 
+                  href=paste(bs, "css/bootstrap-responsive", cssExt, sep="")))
+    }
+    
+    result
+  }
+  
+  tagList(
+    # inject bootstrap requirements into head
+    importBootstrap(),
+    list(...)
+  )
+}
+
+#' Create a page with a sidebar
+#' 
+#' Create a Shiny UI that contains a header with the application title, a 
+#' sidebar for input controls, and a main area for output.
+#' 
+#' @param headerPanel The \link{headerPanel} with the application title
+#' @param sidebarPanel The \link{sidebarPanel} containing input controls
+#' @param mainPanel The \link{mainPanel} containing outputs
+#' @return A UI defintion that can be passed to the \link{shinyUI} function
+#' 
+#' @examples
+#' # Define UI
+#' shinyUI(pageWithSidebar(
+#'   
+#'   # Application title
+#'   headerPanel("Hello Shiny!"),
+#'   
+#'   # Sidebar with a slider input
+#'   sidebarPanel(
+#'     sliderInput("obs", 
+#'                 "Number of observations:", 
+#'                 min = 0, 
+#'                 max = 1000, 
+#'                 value = 500)
+#'   ),
+#'   
+#'   # Show a plot of the generated distribution
+#'   mainPanel(
+#'     plotOutput("distPlot")
+#'   )
+#' ))
+#'
+#' @export
+pageWithSidebar <- function(headerPanel, sidebarPanel, mainPanel) {
+  
+  bootstrapPage(
+    # basic application container divs
+    div(
+      class="container-fluid", 
+      div(class="row-fluid", 
+          headerPanel
+      ),
+      div(class="row-fluid", 
+          sidebarPanel, 
+          mainPanel
+      )
+    )
+  )
+}
+
+
+#' Create a header panel
+#' 
+#' Create a header panel containing an application title.
+#' 
+#' @param title An application title to display
+#' @return A headerPanel that can be passed to \link{pageWithSidebar}
+#' 
+#' @examples
+#' headerPanel("Hello Shiny!")
+#' @export
+headerPanel <- function(title) {    
+  tagList(
+    tags$head(tags$title(title)),
+    div(class="span12", style="padding: 10px 0px;",
+      h1(title)
+    )
+  )
+}
+
+#' Create a well panel
+#' 
+#' Creates a panel with a slightly inset border and grey background. Equivalent
+#' to Twitter Bootstrap's \code{well} CSS class.
+#' 
+#' @param ... UI elements to include inside the panel.
+#' @return The newly created panel.
+#' 
+#' @export
+wellPanel <- function(...) {
+  div(class="well", ...)
+}
+
+#' Create a sidebar panel
+#' 
+#' Create a sidebar panel containing input controls that can in turn be 
+#' passed to \link{pageWithSidebar}.
+#' 
+#' @param ... UI elements to include on the sidebar
+#' @return A sidebar that can be passed to \link{pageWithSidebar}
+#' 
+#' @examples
+#' # Sidebar with controls to select a dataset and specify
+#' # the number of observations to view
+#' sidebarPanel(
+#'   selectInput("dataset", "Choose a dataset:", 
+#'               choices = c("rock", "pressure", "cars")),
+#'   
+#'   numericInput("obs", "Observations:", 10)
+#' )
+#' @export
+sidebarPanel <- function(...) {
+  div(class="span4",
+    tags$form(class="well", 
+      ...
+    )
+  )
+}
+
+#' Create a main panel
+#' 
+#' Create a main panel containing output elements that can in turn be 
+#' passed to \link{pageWithSidebar}.
+#' 
+#' @param ... Ouput elements to include in the main panel
+#' @return A main panel that can be passed to \link{pageWithSidebar}
+#' 
+#' @examples
+#' # Show the caption and plot of the requested variable against mpg
+#' mainPanel(
+#'    h3(textOutput("caption")),
+#'    plotOutput("mpgPlot")
+#' )
+#' @export
+mainPanel <- function(...) {
+  div(class="span8",
+    ...
+  )
+}
+
+#' Conditional Panel
+#' 
+#' Creates a panel that is visible or not, depending on the value of a 
+#' JavaScript expression. The JS expression is evaluated once at startup and 
+#' whenever Shiny detects a relevant change in input/output.
+#' 
+#' In the JS expression, you can refer to \code{input} and \code{output} 
+#' JavaScript objects that contain the current values of input and output. For
+#' example, if you have an input with an id of \code{foo}, then you can use
+#' \code{input.foo} to read its value. (Be sure not to modify the input/output
+#' objects, as this may cause unpredictable behavior.)
+#' 
+#' @param condition A JavaScript expression that will be evaluated repeatedly to
+#'   determine whether the panel should be displayed.
+#' @param ... Elements to include in the panel.
+#' 
+#' @examples
+#' sidebarPanel(
+#'    selectInput(
+#'       "plotType", "Plot Type",
+#'       list(Scatter = "scatter",
+#'            Histogram = "hist")),
+#' 
+#'    # Only show this panel if the plot type is a histogram
+#'    conditionalPanel(
+#'       condition = "input.plotType == 'hist'",
+#'       selectInput(
+#'          "breaks", "Breaks",
+#'          list("Sturges", 
+#'               "Scott",
+#'               "Freedman-Diaconis",
+#'               "[Custom]" = "custom")),
+#'               
+#'       # Only show this panel if Custom is selected
+#'       conditionalPanel(
+#'          condition = "input.breaks == 'custom'",
+#'          sliderInput("breakCount", "Break Count", min=1, max=1000, value=10)
+#'       )
+#'    )
+#' )
+#'   
+#' @export
+conditionalPanel <- function(condition, ...) {
+  div('data-display-if'=condition, ...)
+}
+
+#' Create a text input control
+#' 
+#' Create an input control for entry of unstructured text values
+#' 
+#' @param inputId Input variable to assign the control's value to
+#' @param label Display label for the control
+#' @param value Initial value
+#' @return A text input control that can be added to a UI definition.
+#' 
+#' @examples
+#' textInput("caption", "Caption:", "Data Summary")
+#' @export
+textInput <- function(inputId, label, value = "") {
+  tagList(
+    tags$label(label),
+    tags$input(id = inputId, type="text", value=value)
+  )
+}
+
+#' Create a numeric input control
+#' 
+#' Create an input control for entry of numeric values
+#' 
+#' @param inputId Input variable to assign the control's value to
+#' @param label Display label for the control
+#' @param value Initial value
+#' @param min Minimum allowed value
+#' @param max Maximum allowed value
+#' @param step Interval to use when stepping between min and max
+#' @return A numeric input control that can be added to a UI definition.
+#' 
+#' @examples
+#' numericInput("obs", "Observations:", 10, 
+#'              min = 1, max = 100)
+#' @export
+numericInput <- function(inputId, label, value, min = NA, max = NA, step = NA) {
+  
+  # build input tag
+  inputTag <- tags$input(id = inputId, type = "number", value = value)
+  if (!is.na(min))
+    inputTag$attribs$min = min
+  if (!is.na(max))
+    inputTag$attribs$max = max
+  if (!is.na(step))
+    inputTag$attribs$step = step
+  
+  tagList(
+    tags$label(label),
+    inputTag
+  )
+}
+
+
+#' File Upload Control
+#' 
+#' Create a file upload control that can be used to upload one or more files. 
+#' \bold{Experimental feature. Only works in some browsers (primarily tested on
+#' Chrome and Firefox).}
+#' 
+#' @param inputId Input variable to assign the control's value to.
+#' @param label Display label for the control.
+#' @param multiple Whether the user should be allowed to select and upload 
+#'   multiple files at once.
+#' @param accept A character vector of MIME types; gives the browser a hint of 
+#'   what kind of files the server is expecting.
+#'   
+#' @export
+fileInput <- function(inputId, label, multiple = FALSE, accept = NULL) {
+  inputTag <- tags$input(id = inputId, type = "file")
+  if (multiple)
+    inputTag$attribs$multiple <- "multiple"
+  if (length(accept) > 0)
+    inputTag$attribs$accept <- paste(accept, collapse=',')
+  
+  tagList(
+    tags$label(label),
+    inputTag
+  )
+}
+
+
+#' Checkbox Input Control
+#' 
+#' Create a checkbox that can be used to specify logical values.
+#' 
+#' @param inputId Input variable to assign the control's value to.
+#' @param label Display label for the control.
+#' @param value Initial value (\code{TRUE} or \code{FALSE}).
+#' @return A checkbox control that can be added to a UI definition.
+#' 
+#' @seealso \code{\link{checkboxGroupInput}}
+#' 
+#' @examples
+#' checkboxInput("outliers", "Show outliers", FALSE)
+#' @export
+checkboxInput <- function(inputId, label, value = FALSE) {
+  inputTag <- tags$input(id = inputId, type="checkbox")
+  if (!is.null(value) && value)
+    inputTag$attribs$checked <- "checked"
+  tags$label(class = "checkbox", inputTag, label)
+}
+
+
+#' Checkbox Group Input Control
+#' 
+#' Create a group of checkboxes that can be used to toggle multiple choices 
+#' independently. The server will receive the input as a character vector of the
+#' selected values.
+#' 
+#' @param inputId Input variable to assign the control's value to.
+#' @param label Display label for the control.
+#' @param choices List of values to show checkboxes for. If elements of the list
+#'   are named then that name rather than the value is displayed to the user.
+#' @param selected Names of items that should be initially selected, if any.
+#' @return A list of HTML elements that can be added to a UI definition.
+#'   
+#' @seealso \code{\link{checkboxInput}}
+#'   
+#' @examples
+#' checkboxGroupInput("variable", "Variable:",
+#'                    list("Cylinders" = "cyl", 
+#'                         "Transmission" = "am", 
+#'                         "Gears" = "gear"))
+#'                  
+#' @export
+checkboxGroupInput <- function(inputId, label, choices, selected = NULL) {
+  # resolve names
+  choices <- choicesWithNames(choices)
+  
+  checkboxes <- list()
+  for (choiceName in names(choices)) {
+    
+    checkbox <- tags$input(name = inputId, type="checkbox",
+                           value = choices[[choiceName]])
+    
+    if (choiceName %in% selected)
+      checkbox$attribs$selected <- 'selected'
+    
+    checkboxes[[length(checkboxes)+1]] <- checkbox
+    checkboxes[[length(checkboxes)+1]] <- choiceName
+    checkboxes[[length(checkboxes)+1]] <- tags$br()
+  } 
+  
+  # return label and select tag
+  tags$div(class='control-group',
+           controlLabel(inputId, label),
+           checkboxes)
+}
+
+
+#' Create a help text element
+#' 
+#' Create help text which can be added to an input form to provide
+#' additional explanation or context.
+#' 
+#' @param text Help text string
+#' @param ... Additional help text strings
+#' @return A help text element that can be added to a UI definition.
+#' 
+#' @examples
+#' helpText("Note: while the data view will show only",
+#'          "the specified number of observations, the",
+#'          "summary will be based on the full dataset.")
+#' @export
+helpText <- function(text, ...) {
+  text <- c(text, as.character(list(...)))
+  text <- paste(text, collapse=" ")
+  span(class="help-block", text)
+}
+
+controlLabel <- function(controlName, label) {
+  tags$label(class = "control-label", `for` = controlName, label)
+}
+
+choicesWithNames <- function(choices) {
+  # get choice names
+  choiceNames <- names(choices)
+  if (is.null(choiceNames))
+    choiceNames <- character(length(choices))
+  
+  # default missing names to choice values
+  missingNames <- choiceNames == ""
+  choiceNames[missingNames] <- paste(choices)[missingNames]
+  names(choices) <- choiceNames
+  
+  # return choices
+  return (choices)
+}
+
+#' Create a select list input control
+#' 
+#' Create a select list that can be used to choose a single or
+#' multiple items from a list of values.
+#' 
+#' @param inputId Input variable to assign the control's value to
+#' @param label Display label for the control
+#' @param choices List of values to select from. If elements of the list are 
+#' named then that name rather than the value is displayed to the user.
+#' @param selected Name of initially selected item (or multiple names if
+#' \code{multiple = TRUE}). If not specified then defaults to the first item
+#' for single-select lists and no items for multiple select lists.
+#' @param multiple Is selection of multiple items allowed?
+#' @return A select list control that can be added to a UI definition.
+#' 
+#' @examples
+#' selectInput("variable", "Variable:",
+#'             list("Cylinders" = "cyl", 
+#'                  "Transmission" = "am", 
+#'                  "Gears" = "gear"))
+#' @export
+selectInput <- function(inputId, 
+                        label, 
+                        choices, 
+                        selected = NULL, 
+                        multiple = FALSE) {
+  # resolve names
+  choices <- choicesWithNames(choices)
+  
+  # default value if it's not specified
+  if (is.null(selected) && !multiple)
+    selected <- names(choices)[[1]]
+  
+  # create select tag and add options
+  selectTag <- tags$select(id = inputId)
+  if (multiple)
+    selectTag$attribs$multiple <- "multiple"
+  for (choiceName in names(choices)) {
+    optionTag <- tags$option(value = choices[[choiceName]], choiceName)
+    if (choiceName %in% selected)
+      optionTag$attribs$selected = "selected"
+    selectTag <- tagAppendChild(selectTag, optionTag)
+  } 
+  
+  # return label and select tag
+  tagList(controlLabel(inputId, label), selectTag)
+}
+
+#' Create radio buttons
+#' 
+#' Create a set of radio buttons used to select an item from a list.
+#' 
+#' @param inputId Input variable to assign the control's value to
+#' @param label Display label for the control
+#' @param choices List of values to select from (if elements of the list are 
+#' named then that name rather than the value is displayed to the user)
+#' @param selected Name of initially selected item (if not specified then
+#' defaults to the first item)
+#' @return A set of radio buttons that can be added to a UI definition.
+#' 
+#' @examples
+#' radioButtons("dist", "Distribution type:",
+#'              list("Normal" = "norm",
+#'                   "Uniform" = "unif",
+#'                   "Log-normal" = "lnorm",
+#'                   "Exponential" = "exp"))
+#' @export
+radioButtons <- function(inputId, label, choices, selected = NULL) {
+  # resolve names
+  choices <- choicesWithNames(choices)
+  
+  # default value if it's not specified
+  if (is.null(selected))
+    selected <- names(choices)[[1]]
+  
+  # build list of radio button tags
+  inputTags <- list()
+  for (i in 1:length(choices)) {
+    id <- paste(inputId, i, sep="")
+    name <- names(choices)[[i]]
+    value <- choices[[i]]
+    inputTag <- tags$input(type = "radio", 
+                           name = inputId,
+                           id = id,
+                           value = value)
+    if (identical(name, selected))
+      inputTag$attribs$checked = "checked"
+    
+    labelTag <- tags$label(class = "radio")
+    labelTag <- tagAppendChild(labelTag, inputTag)
+    labelTag <- tagAppendChild(labelTag, name)
+    inputTags[[length(inputTags) + 1]] <- labelTag
+  }
+  
+  tagList(tags$label(class = "control-label", label),
+          inputTags)
+}
+
+#' Create a submit button
+#' 
+#' Create a submit button for an input form. Forms that include a submit
+#' button do not automatically update their outputs when inputs change,
+#' rather they wait until the user explicitly clicks the submit button.
+#' 
+#' @param text Button caption
+#' @return A submit button that can be added to a UI definition.
+#' 
+#' @examples
+#' submitButton("Update View")
+#' @export
+submitButton <- function(text = "Apply Changes") {
+  div(
+    tags$button(type="submit", class="btn btn-primary", text)
+  )
+}
+
+#' Slider Input Widget
+#' 
+#' Constructs a slider widget to select a numeric value from a range.
+#' 
+#' @param inputId Specifies the \code{input} slot that will be used to access 
+#'   the value.
+#' @param label A descriptive label to be displayed with the widget.
+#' @param min The minimum value (inclusive) that can be selected.
+#' @param max The maximum value (inclusive) that can be selected.
+#' @param value The initial value of the slider. A warning will be issued if the
+#'   value doesn't fit between \code{min} and \code{max}.
+#' @param step Specifies the interval between each selectable value on the 
+#'   slider (\code{NULL} means no restriction).
+#' @param round \code{TRUE} to round all values to the nearest integer; 
+#'   \code{FALSE} if no rounding is desired; or an integer to round to that 
+#'   number of digits (for example, 1 will round to the nearest 10, and -2 will 
+#'   round to the nearest .01). Any rounding will be applied after snapping to 
+#'   the nearest step.
+#' @param format Customize format values in slider labels. See 
+#'   \url{http://archive.plugins.jquery.com/project/numberformatter} for syntax 
+#'   details.
+#' @param locale The locale to be used when applying \code{format}. See details.
+#' @param ticks \code{FALSE} to hide tick marks, \code{TRUE} to show them 
+#'   according to some simple heuristics.
+#' @param animate \code{TRUE} to show simple animation controls with default 
+#'   settings; \code{FALSE} not to; or a custom settings list, such as those 
+#'   created using \code{\link{animationOptions}}.
+#'   
+#' @details
+#' 
+#' Valid values for \code{locale} are: \tabular{ll}{ Arab Emirates \tab "ae" \cr
+#' Australia \tab "au" \cr Austria \tab "at" \cr Brazil \tab "br" \cr Canada 
+#' \tab "ca" \cr China \tab "cn" \cr Czech \tab "cz" \cr Denmark \tab "dk" \cr 
+#' Egypt \tab "eg" \cr Finland \tab "fi" \cr France  \tab "fr" \cr Germany \tab 
+#' "de" \cr Greece \tab "gr" \cr Great Britain \tab "gb" \cr Hong Kong \tab "hk"
+#' \cr India \tab "in" \cr Israel \tab "il" \cr Japan \tab "jp" \cr Russia \tab 
+#' "ru" \cr South Korea \tab "kr" \cr Spain \tab "es" \cr Sweden \tab "se" \cr 
+#' Switzerland \tab "ch" \cr Taiwan \tab "tw" \cr Thailand \tab "th" \cr United 
+#' States \tab "us" \cr Vietnam \tab "vn" \cr }
+#' 
+#' @export
+sliderInput <- function(inputId, label, min, max, value, step = NULL,
+                        round=FALSE, format='#,##0.#####', locale='us',
+                        ticks=TRUE, animate=FALSE) {
+ 
+  # validate label
+  labelText <- as.character(label)
+  if (!is.character(labelText))
+    stop("label not specified")
+  
+  if (identical(animate, T))
+    animate <- animationOptions()
+  
+  if (!is.null(animate) && !identical(animate, F)) {
+    if (is.null(animate$playButton))
+      animate$playButton <- tags$i(class='icon-play')
+    if (is.null(animate$pauseButton))
+      animate$pauseButton <- tags$i(class='icon-pause')
+  }
+  
+  # build slider
+  tagList(
+    controlLabel(inputId, labelText),  
+    slider(inputId, min=min, max=max, value=value, step=step, round=round,
+           locale=locale, format=format, ticks=ticks,
+           animate=animate)
+  )
+}
+
+
+#' Create a tab panel
+#' 
+#' Create a tab panel that can be included within a \code{\link{tabsetPanel}}.
+#' 
+#' @param title Display title for tab
+#' @param ... UI elements to include within the tab
+#' @param value The value that should be sent when \code{tabsetPanel} reports 
+#'   that this tab is selected. If omitted and \code{tabsetPanel} has an 
+#'   \code{id}, then the title will be used.
+#' @return A tab that can be passed to \code{\link{tabsetPanel}}
+#'   
+#' @examples
+#' # 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"))
+#'   )
+#' )
+#' @export
+tabPanel <- function(title, ..., value = NULL) {
+  div(class="tab-pane", title=title, `data-value`=value, ...)
+}
+
+#' Create a tabset panel
+#' 
+#' Create a tabset that contains \code{\link{tabPanel}} elements. Tabsets are
+#' useful for dividing output into multiple independently viewable sections.
+#' 
+#' @param ... \code{\link{tabPanel}} elements to include in the tabset
+#' @param id If provided, you can use \code{input$}\emph{\code{id}} in your server 
+#'   logic to determine which of the current tabs is active. The value will 
+#'   correspond to the \code{value} argument that is passed to 
+#'   \code{\link{tabPanel}}.
+#' @return A tabset that can be passed to \code{\link{mainPanel}}
+#'   
+#' @examples
+#' # Show a tabset that includes a plot, summary, and
+#' # table view of the generated distribution
+#' mainPanel(
+#'   tabsetPanel(
+#'     tabPanel("Plot", plotOutput("plot")), 
+#'     tabPanel("Summary", verbatimTextOutput("summary")), 
+#'     tabPanel("Table", tableOutput("table"))
+#'   )
+#' )
+#' @export
+tabsetPanel <- function(..., id = NULL) {
+  
+  # build tab-nav and tab-content divs
+  tabs <- list(...)
+  tabNavList <- tags$ul(class = "nav nav-tabs", id = id)
+  tabContent <- tags$div(class = "tab-content")
+  firstTab <- TRUE
+  tabsetId <- as.integer(stats::runif(1, 1, 10000))
+  tabId <- 1
+  for (divTag in tabs) {
+    # compute id and assign it to the div
+    thisId <- paste("tab", tabsetId, tabId, sep="-")
+    divTag$attribs$id <- thisId
+    tabId <- tabId + 1
+    
+    tabValue <- divTag$attribs$`data-value`
+    if (!is.null(tabValue) && is.null(id)) {
+      stop("tabsetPanel doesn't have an id assigned, but one of its tabPanels ",
+           "has a value. The value won't be sent without an id.")
+    }
+
+    # create the li tag
+    liTag <- tags$li(tags$a(href=paste("#", thisId, sep=""),
+                            `data-toggle` = "tab", 
+                            `data-value` = tabValue,
+                            divTag$attribs$title))
+    
+    # set the first tab as active
+    if (firstTab) {
+      liTag$attribs$class <- "active"
+      divTag$attribs$class <- "tab-pane active"
+      firstTab = FALSE
+    }
+    
+    # append the elements to our lists
+    tabNavList <- tagAppendChild(tabNavList, liTag)
+    tabContent <- tagAppendChild(tabContent, divTag)
+  }
+  
+  tabDiv <- tags$div(class = "tabbable", tabNavList, tabContent)
+}
+
+
+#' Create a text output element
+#' 
+#' Render a reactive output variable as text within an application page. The 
+#' text will be included within an HTML \code{div} tag. 
+#' @param outputId output variable to read the value from
+#' @return A text output element that can be included in a panel
+#' @details Text is HTML-escaped prior to rendering. This element is often used 
+#' to dispaly \link{reactiveText} output variables.
+#' @examples
+#' h3(textOutput("caption"))
+#' @export
+textOutput <- function(outputId) {
+  div(id = outputId, class = "shiny-text-output")
+}
+
+#' Create a verbatim text output element
+#' 
+#' Render a reactive output variable as verbatim text within an
+#' application page. The text will be included within an HTML \code{pre} tag.
+#' @param outputId output variable to read the value from
+#' @return A verbatim text output element that can be included in a panel
+#' @details Text is HTML-escaped prior to rendering. This element is often used
+#' with the \link{reactivePrint} function to preserve fixed-width formatting
+#' of printed objects.
+#' @examples
+#' mainPanel(
+#'   h4("Summary"),
+#'   verbatimTextOutput("summary"),
+#'  
+#'   h4("Observations"),
+#'   tableOutput("view")
+#' )
+#' @export
+verbatimTextOutput <- function(outputId) {
+  pre(id = outputId, class =  "shiny-text-output")
+}
+
+#' Create a plot output element
+#' 
+#' Render a \link{reactivePlot} within an application page.
+#' @param outputId output variable to read the plot from
+#' @param width Plot width
+#' @param height Plot height
+#' @return A plot output element that can be included in a panel
+#' @examples
+#' # Show a plot of the generated distribution
+#' mainPanel(
+#'   plotOutput("distPlot")
+#' )
+#' @export
+plotOutput <- function(outputId, width = "100%", height="400px") {
+  style <- paste("width:", width, ";", "height:", height)
+  div(id = outputId, class="shiny-plot-output", style = style)
+}
+
+#' Create a table output element
+#' 
+#' Render a \link{reactiveTable} within an application page.
+#' @param outputId output variable to read the table from
+#' @return A table output element that can be included in a panel
+#' @examples
+#' mainPanel(
+#'   tableOutput("view")
+#' )
+#' @export
+tableOutput <- function(outputId) {
+  div(id = outputId, class="shiny-html-output")
+}
+
+#' Create an HTML output element
+#' 
+#' Render a reactive output variable as HTML within an application page. The 
+#' text will be included within an HTML \code{div} tag, and is presumed to 
+#' contain HTML content which should not be escaped.
+#' 
+#' \code{uiOutput} is intended to be used with \code{reactiveUI} on the
+#' server side. It is currently just an alias for \code{htmlOutput}.
+#'   
+#' @param outputId output variable to read the value from
+#' @return An HTML output element that can be included in a panel
+#' @examples
+#' htmlOutput("summary")
+#' @export
+htmlOutput <- function(outputId) {
+  div(id = outputId, class="shiny-html-output")
+}
+
+#' @rdname htmlOutput
+#' @export
+uiOutput <- function(outputId) {
+  htmlOutput(outputId)
+}

R/fileupload.R

@@ -0,0 +1,95 @@
+# 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
+# the websockets package's HTTP server at the moment.
+
+FileUploadOperation <- setRefClass(
+  'FileUploadOperation',
+  fields = list(
+    .parent = 'ANY',
+    .id = 'character',
+    .files = 'data.frame',
+    .dir = 'character',
+    .currentFileInfo = 'list',
+    .currentFileData = 'ANY'
+  ),
+  methods = list(
+    initialize = function(parent, id, dir) {
+      .parent <<- parent
+      .id <<- id
+      .dir <<- dir
+    },
+    fileBegin = function(file) {
+      .currentFileInfo <<- file
+
+      filename <- file.path(.dir, as.character(length(.files)))
+      row <- data.frame(name=file$name, size=file$size, type=file$type,
+                        datapath=filename, stringsAsFactors=F)
+      
+      if (length(.files) == 0)
+        .files <<- row
+      else
+        .files <<- rbind(.files, row)
+      
+      .currentFileData <<- file(filename, open='wb')
+    },
+    fileChunk = function(rawdata) {
+      writeBin(rawdata, .currentFileData)
+    },
+    fileEnd = function() {
+      close(.currentFileData)
+    },
+    finish = function() {
+      .parent$onJobFinished(.id)
+      return(.files)
+    }
+  )
+)
+
+FileUploadContext <- setRefClass(
+  'FileUploadContext',
+  fields = list(
+    .basedir = 'character',
+    .operations = 'Map'
+  ),
+  methods = list(
+    initialize = function(dir=tempdir()) {
+      .basedir <<- dir
+    },
+    createUploadOperation = function() {
+      while (T) {
+        id <- paste(as.raw(runif(12, min=0, max=0xFF)), collapse='')
+        dir <- file.path(.basedir, id)
+        if (!dir.create(dir))
+          next
+        
+        op <- FileUploadOperation$new(.self, id, dir)
+        .operations$set(id, op)
+        return(id)
+      }
+    },
+    getUploadOperation = function(jobId) {
+      .operations$get(jobId)
+    },
+    onJobFinished = function(jobId) {
+      .operations$remove(jobId)
+    }
+  )
+)

R/map.R

@@ -0,0 +1,74 @@
+# TESTS
+# Simple set/get
+# Simple remove
+# Simple containsKey
+# Simple keys
+# Simple values
+# Simple clear
+# Get of unknown key returns NULL
+# Remove of unknown key does nothing
+# Setting a key twice always results in last-one-wins
+# /TESTS
+Map <- setRefClass(
+  'Map',
+  fields = list(
+    .env = 'environment'
+  ),
+  methods = list(
+    initialize = function() {
+      .env <<- new.env(parent=emptyenv())
+    },
+    get = function(key) {
+      if (.self$containsKey(key))
+        return(base::get(key, pos=.env, inherits=F))
+      else
+        return(NULL)
+    },
+    set = function(key, value) {
+      assign(key, value, pos=.env, inherits=F)
+      return(value)
+    },
+    remove = function(key) {
+      if (.self$containsKey(key)) {
+        result <- .self$get(key)
+        rm(list = key, pos=.env, inherits=F)
+        return(result)
+      }
+      return(NULL)
+    },
+    containsKey = function(key) {
+      exists(key, where=.env, inherits=F)
+    },
+    keys = function() {
+      ls(envir=.env, all.names=T)
+    },
+    values = function() {
+      mget(.self$keys(), envir=.env, inherits=F)
+    },
+    clear = function() {
+      .env <<- new.env(parent=emptyenv())
+      invisible(NULL)
+    },
+    size = function() {
+      length(.env)
+    }
+  )
+)
+
+`[.Map` <- function(map, name) {
+  map$get(name)
+}
+
+`[<-.Map` <- function(map, name, value) {
+  map$set(name, value)
+  return(map)
+}
+
+as.list.Map <- function(map) {
+  sapply(map$keys(),
+         map$get,
+         simplify=F)
+}
+length.Map <- function(map) {
+  map$size()
+}

R/random.R

@@ -0,0 +1,41 @@
+#' Make a random number generator repeatable
+#' 
+#' 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}}.
+#'
+#' @examples
+#' rnormA <- repeatable(rnorm)
+#' rnormB <- repeatable(rnorm)
+#' rnormA(3)  # [1]  1.8285879 -0.7468041 -0.4639111
+#' 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())) {
+      currentSeed <- get('.Random.seed', pos=globalenv())
+      on.exit(assign('.Random.seed', currentSeed, pos=globalenv()))
+    }
+    else {
+      on.exit(rm('.Random.seed', pos=globalenv()))
+    }
+    
+    set.seed(seed)
+    
+    do.call(rngfunc, list(...))
+  }
+}

R/react.R

@@ -1,106 +1,64 @@
-# TESTS
-# Simple set/get
-# Simple remove
-# Simple contains.key
-# Simple keys
-# Simple values
-# Simple clear
-# Get of unknown key returns NULL
-# Remove of unknown key does nothing
-# Setting a key twice always results in last-one-wins
-# /TESTS
-Map <- setRefClass(
-  'Map',
-  fields = list(
-    .env = 'environment'
-  ),
-  methods = list(
-    initialize = function() {
-      .env <<- new.env(parent=emptyenv())
-    },
-    get = function(key) {
-      if (.self$contains.key(key))
-        return(base::get(key, pos=.env, inherits=F))
-      else
-        return(NULL)
-    },
-    set = function(key, value) {
-      assign(key, value, pos=.env, inherits=F)
-      return(value)
-    },
-    remove = function(key) {
-      if (.self$contains.key(key)) {
-        result <- .self$get(key)
-        rm(list = key, pos=.env, inherits=F)
-        return(result)
-      }
-      return(NULL)
-    },
-    contains.key = function(key) {
-      exists(key, where=.env, inherits=F)
-    },
-    keys = function() {
-      ls(envir=.env, all.names=T)
-    },
-    values = function() {
-      mget(.self$keys(), envir=.env, inherits=F)
-    },
-    clear = function() {
-      .env <<- new.env(parent=emptyenv())
-      invisible(NULL)
-    },
-    size = function() {
-      length(.env)
-    }
-  )
-)
-
-as.list.Map <- function(map) {
-  sapply(map$keys(),
-         map$get,
-         simplify=F)
-}
-length.Map <- function(map) {
-  map$size()
-}
-
 Context <- setRefClass(
   'Context',
   fields = list(
     id = 'character',
     .invalidated = 'logical',
-    .callbacks = 'list'
+    .callbacks = 'list',
+    .hintCallbacks = 'list'
   ),
   methods = list(
     initialize = function() {
-      id <<- .get.reactive.environment()$next.id()
+      id <<- .getReactiveEnvironment()$nextId()
       .invalidated <<- F
       .callbacks <<- list()
+      .hintCallbacks <<- list()
     },
     run = function(func) {
-      env <- .get.reactive.environment()
-      old.ctx <- env$current.context(warn=F)
-      env$set.current.context(.self)
-      on.exit(env$set.current.context(old.ctx))
-      func()
+      "Run the provided function under this context."
+      env <- .getReactiveEnvironment()
+      env$runWith(.self, func)
+    },
+    invalidateHint = function() {
+      "Let this context know it may or may not be invalidated very soon; that
+      is, something in its dependency graph has been invalidated but there's no
+      guarantee that the cascade of invalidations will reach all the way here.
+      This is used to show progress in the UI."
+      lapply(.hintCallbacks, function(func) {
+        func()
+      })
     },
     invalidate = function() {
+      "Schedule this context for invalidation. It will not actually be
+        invalidated until the next call to \\code{\\link{flushReact}}."
       if (.invalidated)
         return()
       .invalidated <<- T
-      .get.reactive.environment()$add.pending.invalidate(.self)
+      .getReactiveEnvironment()$addPendingInvalidate(.self)
       NULL
     },
-    on.invalidate = function(func) {
+    onInvalidate = function(func) {
+      "Register a function to be called when this context is invalidated.
+        If this context is already invalidated, the function is called
+        immediately."
       if (.invalidated)
         func()
       else
         .callbacks <<- c(.callbacks, func)
       NULL
     },
-    execute.callbacks = function() {
+    onInvalidateHint = function(func) {
+      .hintCallbacks <<- c(.hintCallbacks, func)
+    },
+    executeCallbacks = function() {
+      "For internal use only."
       lapply(.callbacks, function(func) {
-        func()
+        withCallingHandlers({
+          func()
+        }, warning = function(e) {
+          # TODO: Callbacks in app
+        }, error = function(e) {
+          # TODO: Callbacks in app
+        })
       })
     }
   )
@@ -108,34 +66,39 @@ Context <- setRefClass(
 
 ReactiveEnvironment <- setRefClass(
   'ReactiveEnvironment',
-  fields = c('.current.context', '.next.id', '.pending.invalidate'),
+  fields = c('.currentContext', '.nextId', '.pendingInvalidate'),
   methods = list(
     initialize = function() {
-      .current.context <<- NULL
-      .next.id <<- 0L
-      .pending.invalidate <<- list()
+      .currentContext <<- NULL
+      .nextId <<- 0L
+      .pendingInvalidate <<- list()
     },
-    next.id = function() {
-      .next.id <<- .next.id + 1L
-      return(as.character(.next.id))
+    nextId = function() {
+      .nextId <<- .nextId + 1L
+      return(as.character(.nextId))
     },
-    current.context = function(warn=T) {
-      if (warn && is.null(.current.context))
-        warning('No reactive context is active')
-      return(.current.context)
+    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.)')
+      return(.currentContext)
     },
-    set.current.context = function(ctx) {
-      .current.context <<- ctx
+    runWith = function(ctx, func) {
+      old.ctx <- .currentContext
+      .currentContext <<- ctx
+      on.exit(.currentContext <<- old.ctx)
+      func()
     },
-    add.pending.invalidate = function(ctx) {
-      .pending.invalidate <<- c(.pending.invalidate, ctx)
+    addPendingInvalidate = function(ctx) {
+      .pendingInvalidate <<- c(.pendingInvalidate, ctx)
     },
     flush = function() {
-      while (length(.pending.invalidate) > 0) {
-        contexts <- .pending.invalidate
-        .pending.invalidate <<- list()
+      while (length(.pendingInvalidate) > 0) {
+        contexts <- .pendingInvalidate
+        .pendingInvalidate <<- list()
         lapply(contexts, function(ctx) {
-          ctx$execute.callbacks()
+          ctx$executeCallbacks()
           NULL
         })
       }
@@ -143,161 +106,20 @@ ReactiveEnvironment <- setRefClass(
   )
 )
 
-Values <- setRefClass(
-  'Values',
-  fields = list(
-    .values = 'environment',
-    .dependencies = 'environment'
-  ),
-  methods = list(
-    initialize = function() {
-      .values <<- new.env(parent=emptyenv())
-      .dependencies <<- new.env(parent=emptyenv())
-    },
-    get = function(key) {
-      ctx <- .get.reactive.environment()$current.context()
-      dep.key <- paste(key, ':', ctx$id, sep='')
-      if (!exists(dep.key, where=.dependencies, inherits=F)) {
-        assign(dep.key, ctx, pos=.dependencies, inherits=F)
-        ctx$on.invalidate(function() {
-          rm(list=dep.key, pos=.dependencies, inherits=F)
-        })
-      }
-      
-      if (!exists(key, where=.values, inherits=F))
-        NULL
-      else
-        base::get(key, pos=.values, inherits=F)
-    },
-    set = function(key, value) {
-      if (exists(key, where=.values, inherits=F)) {
-        if (identical(base::get(key, pos=.values, inherits=F), value)) {
-          return(invisible())
-        }
-      }
-      
-      assign(key, value, pos=.values, inherits=F)
-      dep.keys <- objects(
-        pos=.dependencies,
-        pattern=paste('^\\Q', key, ':', '\\E', '\\d+$', sep='')
-      )
-      lapply(
-        mget(dep.keys, envir=.dependencies),
-        function(ctx) {
-          ctx$invalidate()
-          NULL
-        }
-      )
-      invisible()
-    },
-    mset = function(lst) {
-      lapply(names(lst),
-             function(name) {
-               .self$set(name, lst[[name]])
-             })
-    }
-  )
-)
-
-Observable <- setRefClass(
-  'Observable',
-  fields = c(
-    '.func',         # function
-    '.dependencies', # Map
-    '.initialized',  # logical
-    '.value'         # any
-  ),
-  methods = list(
-    initialize = function(func) {
-      .func <<- func
-      .dependencies <<- Map$new()
-      .initialized <<- F
-    },
-    get.value = function() {
-      if (!.initialized) {
-        .initialized <<- T
-        .self$.update.value()
-      }
-      
-      ctx <- .get.reactive.environment()$current.context()
-      if (!.dependencies$contains.key(ctx$id)) {
-        .dependencies$set(ctx$id, ctx)
-        ctx$on.invalidate(function() {
-          .dependencies$remove(ctx$id)
-        })
-      }
-      return(.value)
-    },
-    .update.value = function() {
-      old.value <- .value
-      
-      ctx <- Context$new()
-      ctx$on.invalidate(function() {
-        .self$.update.value()
-      })
-      ctx$run(function() {
-        .value <<- .func()
-      })
-      if (!identical(old.value, .value)) {
-        lapply(
-          .dependencies$values(),
-          function(dep.ctx) {
-            dep.ctx$invalidate()
-            NULL
-          }
-        )
-      }
-    }
-  )
-)
-
-Observer <- setRefClass(
-  'Observer',
-  fields = list(
-    .func = 'function'
-  ),
-  methods = list(
-    initialize = function(func) {
-      .func <<- func
-      .self$run()
-    },
-    run = function() {
-      ctx <- Context$new()
-      ctx$on.invalidate(function() {
-        run()
-      })
-      ctx$run(.func)
-    }
-  )
-)
-
-.get.reactive.environment <- function() {
+.getReactiveEnvironment <- function() {
   if (!exists('.ReactiveEnvironment', envir=.GlobalEnv, inherits=F)) {
     assign('.ReactiveEnvironment', ReactiveEnvironment$new(), envir=.GlobalEnv)
   }
   get('.ReactiveEnvironment', envir=.GlobalEnv, inherits=F)
 }
 
-flush.react <- function() {
-  .get.reactive.environment()$flush()
+# Causes any pending invalidations to run.
+flushReact <- function() {
+  .getReactiveEnvironment()$flush()
 }
 
-test <- function () {
-  values <- Values$new()
-  obs <- Observer$new(function() {print(values$get('foo'))})
-  flush.react()
-  values$set('foo', 'bar')
-  flush.react()
-  
-  values$set('a', 100)
-  values$set('b', 250)
-  observable <- Observable$new(function() {
-    values$get('a') + values$get('b')
-  })
-  obs2 <- Observer$new(function() {print(paste0('a+b: ', observable$get.value()))})
-  flush.react()
-  values$set('b', 300)
-  flush.react()
-  values$mset(list(a = 10, b = 20))
-  flush.react()
+# Retrieves the current reactive context, or errors if there is no reactive
+# context active at the moment.
+getCurrentContext <- function() {
+  .getReactiveEnvironment()$currentContext()
 }

R/reactives.R

@@ -0,0 +1,337 @@
+Dependencies <- setRefClass(
+  'Dependencies',
+  fields = list(
+    .dependencies = 'Map'
+  ),
+  methods = list(
+    register = function() {
+      ctx <- .getReactiveEnvironment()$currentContext()
+      if (!.dependencies$containsKey(ctx$id)) {
+        .dependencies$set(ctx$id, ctx)
+        ctx$onInvalidate(function() {
+          .dependencies$remove(ctx$id)
+        })
+      }
+    },
+    invalidate = function() {
+      lapply(
+        .dependencies$values(),
+        function(ctx) {
+          ctx$invalidateHint()
+          ctx$invalidate()
+          NULL
+        }
+      )
+    },
+    invalidateHint = function() {
+      lapply(
+        .dependencies$values(),
+        function(dep.ctx) {
+          dep.ctx$invalidateHint()
+          NULL
+        })
+    }
+  )
+)
+
+Values <- setRefClass(
+  'Values',
+  fields = list(
+    .values = 'environment',
+    .dependencies = 'environment',
+    # Dependencies for the list of names
+    .namesDeps = 'Dependencies',
+    # Dependencies for all values
+    .allDeps = 'Dependencies'
+  ),
+  methods = list(
+    initialize = function() {
+      .values <<- new.env(parent=emptyenv())
+      .dependencies <<- new.env(parent=emptyenv())
+    },
+    get = function(key) {
+      ctx <- .getReactiveEnvironment()$currentContext()
+      dep.key <- paste(key, ':', ctx$id, sep='')
+      if (!exists(dep.key, where=.dependencies, inherits=F)) {
+        assign(dep.key, ctx, pos=.dependencies, inherits=F)
+        ctx$onInvalidate(function() {
+          rm(list=dep.key, pos=.dependencies, inherits=F)
+        })
+      }
+      
+      if (!exists(key, where=.values, inherits=F))
+        NULL
+      else
+        base::get(key, pos=.values, inherits=F)
+    },
+    set = function(key, value) {
+      if (exists(key, where=.values, inherits=F)) {
+        if (identical(base::get(key, pos=.values, inherits=F), value)) {
+          return(invisible())
+        }
+      }
+      else {
+        .namesDeps$invalidate()
+      }
+      .allDeps$invalidate()
+      
+      assign(key, value, pos=.values, inherits=F)
+      dep.keys <- objects(
+        pos=.dependencies,
+        pattern=paste('^\\Q', key, ':', '\\E', '\\d+$', sep=''),
+        all.names=T
+      )
+      lapply(
+        mget(dep.keys, envir=.dependencies),
+        function(ctx) {
+          ctx$invalidateHint()
+          ctx$invalidate()
+          NULL
+        }
+      )
+      invisible()
+    },
+    mset = function(lst) {
+      lapply(base::names(lst),
+             function(name) {
+               .self$set(name, lst[[name]])
+             })
+    },
+    names = function() {
+      .namesDeps$register()
+      return(ls(.values, all.names=T))
+    },
+    toList = function() {
+      .allDeps$register()
+      return(as.list(.values))
+    }
+  )
+)
+
+`[.Values` <- function(values, name) {
+  values$get(name)
+}
+
+`[<-.Values` <- function(values, name, value) {
+  values$set(name, value)
+  return(values)
+}
+
+.createValuesReader <- function(values) {
+  acc <- list(impl=values)
+  class(acc) <- 'reactvaluesreader'
+  return(acc)
+}
+
+#' @S3method $ reactvaluesreader
+`$.reactvaluesreader` <- function(x, name) {
+  x[['impl']]$get(name)
+}
+
+#' @S3method names reactvaluesreader
+names.reactvaluesreader <- function(x) {
+  x[['impl']]$names()
+}
+
+#' @S3method as.list reactvaluesreader
+as.list.reactvaluesreader <- function(x, ...) {
+  x[['impl']]$toList()
+}
+
+Observable <- setRefClass(
+  'Observable',
+  fields = list(
+    .func = 'function',
+    .dependencies = 'Dependencies',
+    .initialized = 'logical',
+    .value = 'ANY'
+  ),
+  methods = list(
+    initialize = function(func) {
+      if (length(formals(func)) > 0)
+        stop("Can't make a reactive function from a function that takes one ",
+             "or more parameters; only functions without parameters can be ",
+             "reactive.")
+      .func <<- func
+      .initialized <<- F
+    },
+    getValue = function() {
+      if (!.initialized) {
+        .initialized <<- T
+        .self$.updateValue()
+      }
+      
+      .dependencies$register()
+      
+      if (identical(class(.value), 'try-error'))
+        stop(attr(.value, 'condition'))
+      return(.value)
+    },
+    .updateValue = function() {
+      old.value <- .value
+      
+      ctx <- Context$new()
+      ctx$onInvalidate(function() {
+        .self$.updateValue()
+      })
+      ctx$onInvalidateHint(function() {
+        .dependencies$invalidateHint()
+      })
+      ctx$run(function() {
+        .value <<- try(.func(), silent=F)
+      })
+      if (!identical(old.value, .value)) {
+        .dependencies$invalidate()
+      }
+    }
+  )
+)
+
+#' Create a Reactive Function
+#' 
+#' Wraps a normal function to create a reactive function. Conceptually, a 
+#' reactive function is a function whose result will change over time.
+#' 
+#' Reactive functions are functions that can read reactive values and call other
+#' reactive functions. Whenever a reactive value changes, any reactive functions
+#' that depended on it are marked as "invalidated" and will automatically 
+#' re-execute if necessary. If a reactive function is marked as invalidated, any
+#' other reactive functions that recently called it are also marked as 
+#' invalidated. In this way, invalidations ripple through the functions that 
+#' depend on each other.
+#' 
+#' See the \href{http://rstudio.github.com/shiny/tutorial/}{Shiny tutorial} for 
+#' more information about reactive functions.
+#' 
+#' @param x The value or function to make reactive. The function must not have 
+#'   any parameters.
+#' @return A reactive function. (Note that reactive functions can only be called
+#'   from within other reactive functions.)
+#'   
+#' @export
+reactive <- function(x) {
+  UseMethod("reactive")
+}
+#' @S3method reactive function
+reactive.function <- function(x) {
+  return(Observable$new(x)$getValue)
+}
+#' @S3method reactive default
+reactive.default <- function(x) {
+  stop("Don't know how to make this object reactive!")
+}
+
+Observer <- setRefClass(
+  'Observer',
+  fields = list(
+    .func = 'function',
+    .hintCallbacks = 'list'
+  ),
+  methods = list(
+    initialize = function(func) {
+      if (length(formals(func)) > 0)
+        stop("Can't make an observer from a function that takes parameters; ",
+             "only functions without parameters can be reactive.")
+
+      .func <<- func
+
+      # Defer the first running of this until flushReact is called
+      ctx <- Context$new()
+      ctx$onInvalidate(function() {
+        run()
+      })
+      ctx$invalidate()
+    },
+    run = function() {
+      ctx <- Context$new()
+      ctx$onInvalidate(function() {
+        run()
+      })
+      ctx$onInvalidateHint(function() {
+        lapply(.hintCallbacks, function(func) {
+          func()
+          NULL
+        })
+      })
+      ctx$run(.func)
+    },
+    onInvalidateHint = function(func) {
+      .hintCallbacks <<- c(.hintCallbacks, func)
+    }
+  )
+)
+
+# NOTE: we de-roxygenized this comment because the function isn't exported
+# Observe
+# 
+# Creates an observer from the given function. An observer is like a reactive 
+# function in that it can read reactive values and call reactive functions, 
+# and will automatically re-execute when those dependencies change. But unlike
+# reactive functions, it doesn't yield a result and can't be used as an input 
+# to other reactive functions. Thus, observers are only useful for their side 
+# effects (for example, performing I/O).
+#
+# @param func The function to observe. It must not have any parameters. Any
+# return value from this function will be ignored.
+#
+observe <- function(func) {
+  Observer$new(func)
+}
+
+#' Timer
+#' 
+#' Creates a reactive timer with the given interval. A reactive timer is like a 
+#' reactive value, except reactive values are triggered when they are set, while
+#' reactive timers are triggered simply by the passage of time.
+#' 
+#' \link[=reactive]{Reactive functions} and observers that want to be 
+#' invalidated by the timer need to call the timer function that 
+#' \code{reactiveTimer} returns, even if the current time value is not actually 
+#' needed.
+#' 
+#' See \code{\link{invalidateLater}} as a safer and simpler alternative.
+#' 
+#' @param intervalMs How often to fire, in milliseconds
+#' @return A no-parameter function that can be called from a reactive context, 
+#'   in order to cause that context to be invalidated the next time the timer 
+#'   interval elapses. Calling the returned function also happens to yield the 
+#'   current time (as in \code{\link{Sys.time}}).
+#' @seealso invalidateLater
+#' @export
+reactiveTimer <- function(intervalMs=1000) {
+  dependencies <- Map$new()
+  timerCallbacks$schedule(intervalMs, function() {
+    timerCallbacks$schedule(intervalMs, sys.function())
+    lapply(
+      dependencies$values(),
+      function(dep.ctx) {
+        dep.ctx$invalidate()
+        NULL
+      })
+  })
+  return(function() {
+    ctx <- .getReactiveEnvironment()$currentContext()
+    if (!dependencies$containsKey(ctx$id)) {
+      dependencies$set(ctx$id, ctx)
+      ctx$onInvalidate(function() {
+        dependencies$remove(ctx$id)
+      })
+    }
+    return(Sys.time())
+  })
+}
+
+#' Scheduled Invalidation
+#' 
+#' Schedules the current reactive context to be invalidated in the given number 
+#' of milliseconds.
+#' @param millis Approximate milliseconds to wait before invalidating the
+#'   current reactive context.
+#' @export
+invalidateLater <- function(millis) {
+  ctx <- .getReactiveEnvironment()$currentContext()
+  timerCallbacks$schedule(millis, function() {
+    ctx$invalidate()
+  })
+  invisible()
+}

R/shiny.R

@@ -1,105 +1,295 @@
+#' @docType package
+#' @import websockets caTools RJSONIO xtable digest
+NULL
+
 suppressPackageStartupMessages({
   library(websockets)
   library(RJSONIO)
-  library(caTools)
-  library(xtable)
 })
 
 ShinyApp <- setRefClass(
   'ShinyApp',
   fields = list(
     .websocket = 'list',
-    .outputs = 'Map',
-    .invalidated.output.values = 'Map',
+    .invalidatedOutputValues = 'Map',
+    .invalidatedOutputErrors = 'Map',
+    .progressKeys = 'character',
+    .fileUploadContext = 'FileUploadContext',
     session = 'Values'
   ),
   methods = list(
     initialize = function(ws) {
       .websocket <<- ws
-      .outputs <<- Map$new()
-      .invalidated.output.values <<- Map$new()
+      .invalidatedOutputValues <<- Map$new()
+      .invalidatedOutputErrors <<- Map$new()
+      .progressKeys <<- character(0)
+      # TODO: Put file upload context in user/app-specific dir if possible
+      .fileUploadContext <<- FileUploadContext$new()
       session <<- Values$new()
     },
-    define.output = function(name, func) {
-      .outputs$set(name, func)
-    },
-    define.plot.output = function(name, func, ...) {
-      .outputs$set(name, function() {
-        png.file <- tempfile(fileext='.png')
-        png(filename=png.file, ...)
-        func()
-        dev.off()
-
-        bytes <- file.info(png.file)$size
-        if (is.na(bytes))
-          return(NULL)
-        
-        b64 <- base64encode(readBin(png.file, 'raw', n=bytes))
-        return(paste("data:image/png;base64,", b64, sep=''))
-      })
-    },
-    define.table.output = function(name, func) {
-      .outputs$set(name, function() {
-        data <- func()
-        return(paste(capture.output(print(xtable(data), type='html')), collapse="\n"))
-      })
-    },
-    instantiate.outputs = function() {
-      lapply(.outputs$keys(),
-             function(key) {
-               func <- .outputs$remove(key)
-               Observer$new(function() {
-                 value <- func()
-                 .invalidated.output.values$set(key, value)
-               })
-             })
-    },
-    flush.output = function() {
-      if (length(.invalidated.output.values) == 0)
-        return(invisible())
+    defineOutput = function(name, func) {
+      "Binds an output generating function to this name. The function can either
+      take no parameters, or have named parameters for \\code{name} and
+      \\code{shinyapp} (in the future this list may expand, so it is a good idea
+      to also include \\code{...} in your function signature)."
       
-      data <- .invalidated.output.values
-      .invalidated.output.values <<- Map$new()
-      # cat(c("SEND", toJSON(as.list(data)), "\n"))
-      websocket_write(toJSON(as.list(data)), .websocket)
+      # jcheng 08/31/2012: User submitted an example of a dynamically calculated
+      # name not working unless name was eagerly evaluated. Yikes!
+      force(name)
+      
+      if (is.function(func)) {
+        if (length(formals(func)) != 0) {
+          orig <- func
+          func <- function() {
+            orig(name=name, shinyapp=.self)
+          }
+        }
+
+        obs <- Observer$new(function() {
+          
+          value <- try(func(), silent=F)
+          
+          .invalidatedOutputErrors$remove(name)
+          .invalidatedOutputValues$remove(name)
+          
+          if (inherits(value, 'try-error')) {
+            cond <- attr(value, 'condition')
+            .invalidatedOutputErrors$set(
+              name, 
+              list(message=cond$message,
+                   call=capture.output(print(cond$call))))
+          }
+          else
+            .invalidatedOutputValues$set(name, value)
+        })
+        
+        obs$onInvalidateHint(function() {
+          showProgress(name)
+        })
+      }
+      else {
+        stop(paste("Unexpected", class(func), "output for", name))
+      }
+    },
+    flushOutput = function() {
+      if (length(.progressKeys) == 0
+          && length(.invalidatedOutputValues) == 0
+          && length(.invalidatedOutputErrors) == 0) {
+        return(invisible())
+      }
+      
+      .progressKeys <<- character(0)
+      
+      values <- .invalidatedOutputValues
+      .invalidatedOutputValues <<- Map$new()
+      errors <- .invalidatedOutputErrors
+      .invalidatedOutputErrors <<- Map$new()
+      
+      json <- toJSON(list(errors=as.list(errors),
+                          values=as.list(values)))
+
+      .write(json)
+    },
+    showProgress = function(id) {
+      'Send a message to the client that recalculation of the output identified
+      by \\code{id} is in progress. There is currently no mechanism for
+      explicitly turning off progress for an output component; instead, all
+      progress is implicitly turned off when flushOutput is next called.'
+      if (id %in% .progressKeys)
+        return()
+      
+      .progressKeys <<- c(.progressKeys, id)
+      
+      json <- toJSON(list(progress=list(id)))
+      
+      .write(json)
+    },
+    dispatch = function(msg) {
+      method <- paste('@', msg$method, sep='')
+      func <- try(do.call(`$`, list(.self, method)), silent=T)
+      if (inherits(func, 'try-error')) {
+        .sendErrorResponse(msg, paste('Unknown method', msg$method))
+      }
+      
+      value <- try(do.call(func, as.list(append(msg$args, msg$blobs))))
+      if (inherits(value, 'try-error')) {
+        .sendErrorResponse(msg, paste('Error:', as.character(value)))
+      }
+      else {
+        .sendResponse(msg, value)
+      }
+    },
+    .sendResponse = function(requestMsg, value) {
+      if (is.null(requestMsg$tag)) {
+        warning("Tried to send response for untagged message; method: ",
+                requestMsg$method)
+        return()
+      }
+      .write(toJSON(list(response=list(tag=requestMsg$tag, value=value))))
+    },
+    .sendErrorResponse = function(requestMsg, error) {
+      if (is.null(requestMsg$tag))
+        return()
+      .write(toJSON(list(response=list(tag=requestMsg$tag, error=error))))
+    },
+    .write = function(json) {
+      if (getOption('shiny.trace', F))
+        message('SEND ', json)
+      if (getOption('shiny.transcode.json', T))
+        json <- iconv(json, to='UTF-8')
+      websocket_write(json, .websocket)
+    },
+    
+    # Public RPC methods
+    `@uploadInit` = function() {
+      return(list(jobId=.fileUploadContext$createUploadOperation()))
+    },
+    `@uploadFileBegin` = function(jobId, fileName, fileType, fileSize) {
+      .fileUploadContext$getUploadOperation(jobId)$fileBegin(list(
+        name=fileName, type=fileType, size=fileSize
+      ))
+      invisible()
+    },
+    `@uploadFileChunk` = function(jobId, ...) {
+      args <- list(...)
+      if (length(args) != 1)
+        stop("Bad file chunk request")
+      .fileUploadContext$getUploadOperation(jobId)$fileChunk(args[[1]])
+      invisible()
+    },
+    `@uploadFileEnd` = function(jobId) {
+      .fileUploadContext$getUploadOperation(jobId)$fileEnd()
+      invisible()
+    },
+    `@uploadEnd` = function(jobId, inputId) {
+      fileData <- .fileUploadContext$getUploadOperation(jobId)$finish()
+      session$set(inputId, fileData)
+      invisible()
     }
   )
 )
 
-statics <- function(root, sys.root=NULL) {
-  root <- normalizePath(root, mustWork=T)
-  if (!is.null(sys.root))
-    sys.root <- normalizePath(sys.root, mustWork=T)
-  
-  resolve <- function(dir, relpath) {
-    abs.path <- file.path(dir, relpath)
-    if (!file.exists(abs.path))
-      return(NULL)
-    abs.path <- normalizePath(abs.path, mustWork=T)
-    if (nchar(abs.path) <= nchar(dir) + 1)
-      return(NULL)
-    if (substr(abs.path, 1, nchar(dir)) != dir ||
-        !(substr(abs.path, nchar(dir)+1, nchar(dir)+1) %in% c('/', '\\'))) {
-      return(NULL)
-    }
-    return(abs.path)
+.createOutputWriter <- function(shinyapp) {
+  ow <- list(impl=shinyapp)
+  class(ow) <- 'shinyoutput'
+  return(ow)
+}
+
+#' @S3method $<- shinyoutput
+`$<-.shinyoutput` <- function(x, name, value) {
+  x[['impl']]$defineOutput(name, value)
+  return(invisible(x))
+}
+
+resolve <- function(dir, relpath) {
+  abs.path <- file.path(dir, relpath)
+  if (!file.exists(abs.path))
+    return(NULL)
+  abs.path <- normalizePath(abs.path, winslash='/', mustWork=T)
+  dir <- normalizePath(dir, winslash='/', mustWork=T)
+  if (nchar(abs.path) <= nchar(dir) + 1)
+    return(NULL)
+  if (substr(abs.path, 1, nchar(dir)) != dir ||
+    !(substr(abs.path, nchar(dir)+1, nchar(dir)+1) %in% c('/', '\\'))) {
+    return(NULL)
   }
+  return(abs.path)
+}
+
+httpResponse <- function(status = 200,
+                         content_type = "text/html; charset=UTF-8", 
+                         content = "") {
+  resp <- list(status = status, content_type = content_type, content = content);
+  class(resp) <- 'httpResponse'
+  return(resp)
+}
+
+httpServer <- function(handlers) {
+  handler <- joinHandlers(handlers)
+
+  filter <- getOption('shiny.http.response.filter', NULL)
+  if (is.null(filter))
+    filter <- function(ws, header, response) response
   
+  function(ws, header) {
+    response <- handler(ws, header)
+    if (is.null(response))
+      response <- httpResponse(404, content="<h1>Not Found</h1>")
+    
+    response <- filter(ws, header, response)
+    
+    return(http_response(ws,
+                         status=response$status,
+                         content_type=response$content_type,
+                         content=response$content))
+  }
+}
+
+joinHandlers <- function(handlers) {
+  handlers <- lapply(handlers, function(h) {
+    if (is.character(h))
+      return(staticHandler(h))
+    else
+      return(h)
+  })
+  
+  # Filter out NULL
+  handlers <- handlers[!sapply(handlers, is.null)]
+  
+  if (length(handlers) == 0)
+    return(function(ws, header) NULL)
+  if (length(handlers) == 1)
+    return(handlers[[1]])
+  
+  function(ws, header) {
+    for (handler in handlers) {
+      response <- handler(ws, header)
+      if (!is.null(response))
+        return(response)
+    }
+    return(NULL)
+  }
+}
+
+dynamicHandler <- function(filePath, dependencyFiles=filePath) {
+  lastKnownTimestamps <- NA
+  metaHandler <- function(ws, header) NULL
+  
+  if (!file.exists(filePath))
+    return(metaHandler)
+  
+  return (function(ws, header) {
+    # Check if we need to rebuild
+    mtime <- file.info(dependencyFiles)$mtime
+    if (!identical(lastKnownTimestamps, mtime)) {
+      lastKnownTimestamps <<- mtime
+      clearClients()
+      if (file.exists(filePath)) {
+        local({
+          source(filePath, local=T)
+        })
+      }
+      metaHandler <<- joinHandlers(.globals$clients)
+      clearClients()
+    }
+    
+    return(metaHandler(ws, header))
+  })
+}
+
+staticHandler <- function(root) {
   return(function(ws, header) {
-    # TODO: Stop using websockets' internal methods
     path <- header$RESOURCE
     
     if (is.null(path))
-      return(websockets:::.http_400(ws))
+      return(httpResponse(400, content="<h1>Bad Request</h1>"))
     
     if (path == '/')
       path <- '/index.html'
     
     abs.path <- resolve(root, path)
-    if (is.null(abs.path) && !is.null(sys.root))
-      abs.path <- resolve(sys.root, path)
     if (is.null(abs.path))
-      return(websockets:::.http_400(ws))
+      return(NULL)
     
     ext <- tools::file_ext(abs.path)
     content.type <- switch(ext,
@@ -113,69 +303,506 @@ statics <- function(root, sys.root=NULL) {
                            gif='image/gif',
                            'application/octet-stream')
     response.content <- readBin(abs.path, 'raw', n=file.info(abs.path)$size)
-    return(websockets:::.http_200(ws, content.type, response.content))
+    return(httpResponse(200, content.type, response.content))
   })
 }
 
-start.app <- function(app, www.root, sys.www.root=NULL, port=8101L) {
+apps <- Map$new()
+
+# Provide a character representation of the WS that can be used
+# as a key in a Map.
+wsToKey <- function(WS) {
+  as.character(WS$socket)
+}
+
+.globals <- new.env()
+
+.globals$clients <- function(ws, header) NULL
+
+
+clearClients <- function() {
+  .globals$clients <- function(ws, header) NULL
+}
+
+
+registerClient <- function(client) {
+  .globals$clients <- append(.globals$clients, client)
+}
+
+
+.globals$resources <- list()
+
+#' Resource Publishing
+#' 
+#' Adds a directory of static resources to Shiny's web server, with the given 
+#' path prefix. Primarily intended for package authors to make supporting 
+#' JavaScript/CSS files available to their components.
+#' 
+#' @param prefix The URL prefix (without slashes). Valid characters are a-z, 
+#'   A-Z, 0-9, hyphen, and underscore; and must begin with a-z or A-Z. For 
+#'   example, a value of 'foo' means that any request paths that begin with 
+#'   '/foo' will be mapped to the given directory.
+#' @param directoryPath The directory that contains the static resources to be 
+#'   served.
+#'   
+#' @details You can call \code{addResourcePath} multiple times for a given 
+#'   \code{prefix}; only the most recent value will be retained. If the 
+#'   normalized \code{directoryPath} is different than the directory that's 
+#'   currently mapped to the \code{prefix}, a warning will be issued.
+#'   
+#' @seealso \code{\link{singleton}}
+#' 
+#' @examples
+#' addResourcePath('datasets', system.file('data', package='datasets'))
+#'   
+#' @export
+addResourcePath <- function(prefix, directoryPath) {
+  prefix <- prefix[1]
+  if (!grepl('^[a-z][a-z0-9\\-_]*$', prefix, ignore.case=T, perl=T)) {
+    stop("addResourcePath called with invalid prefix; please see documentation")
+  }
   
-  ws_env <- create_server(port=port, webpage=statics(www.root, sys.www.root))
+  if (prefix %in% c('shared')) {
+    stop("addResourcePath called with the reserved prefix '", prefix, "'; ",
+         "please use a different prefix")
+  }
+  
+  directoryPath <- normalizePath(directoryPath, mustWork=T)
+  
+  existing <- .globals$resources[[prefix]]
+  
+  if (!is.null(existing)) {
+    if (existing$directoryPath != directoryPath) {
+      warning("Overriding existing prefix ", prefix, " => ",
+              existing$directoryPath)
+    }
+  }
+  
+  message('Shiny URLs starting with /', prefix, ' will mapped to ', directoryPath)
+  
+  .globals$resources[[prefix]] <- list(directoryPath=directoryPath,
+                                       func=staticHandler(directoryPath))
+}
+
+resourcePathHandler <- function(ws, header) {
+  path <- header$RESOURCE
+  
+  match <- regexpr('^/([^/]+)/', path, perl=T)
+  if (match == -1)
+    return(NULL)
+  len <- attr(match, 'capture.length')
+  prefix <- substr(path, 2, 2 + len - 1)
+  
+  resInfo <- .globals$resources[[prefix]]
+  if (is.null(resInfo))
+    return(NULL)
+  
+  suffix <- substr(path, 2 + len, nchar(path))
+  
+  header$RESOURCE <- suffix
+  
+  return(resInfo$func(ws, header))
+}
+
+.globals$server <- NULL
+#' Define Server Functionality
+#' 
+#' Defines the server-side logic of the Shiny application. This generally 
+#' involves creating functions that map user inputs to various kinds of output.
+#' 
+#' @param func The server function for this application. See the details section
+#'   for more information.
+#'   
+#' @details
+#' Call \code{shinyServer} from your application's \code{server.R} file, passing
+#' in a "server function" that provides the server-side logic of your 
+#' application.
+#' 
+#' The server function will be called when each client (web browser) first loads
+#' the Shiny application's page. It must take an \code{input} and an
+#' \code{output} parameter. Any return value will be ignored.
+#' 
+#' See the \href{http://rstudio.github.com/shiny/tutorial/}{tutorial} for more 
+#' on how to write a server function.
+#' 
+#' @examples
+#' \dontrun{
+#' # A very simple Shiny app that takes a message from the user
+#' # and outputs an uppercase version of it.
+#' shinyServer(function(input, output) {
+#'   output$uppercase <- reactiveText(function() {
+#'     toupper(input$message)
+#'   })
+#' })
+#' }
+#' 
+#' @export
+shinyServer <- function(func) {
+  .globals$server <- func
+  invisible()
+}
+
+decodeMessage <- function(data) {
+  readInt <- function(pos) {
+    packBits(rawToBits(data[pos:(pos+3)]), type='integer')
+  }
+  
+  if (readInt(1) != 0x01020202L)
+    return(fromJSON(rawToChar(data), asText=T, simplify=F))
+  
+  i <- 5
+  parts <- list()
+  while (i <= length(data)) {
+    length <- readInt(i)
+    i <- i + 4
+    if (length != 0)
+      parts <- append(parts, list(data[i:(i+length-1)]))
+    else
+      parts <- append(parts, list(raw(0)))
+    i <- i + length
+  }
+  
+  mainMessage <- decodeMessage(parts[[1]])
+  mainMessage$blobs <- parts[2:length(parts)]
+  return(mainMessage)
+}
+
+# Takes a list-of-lists and returns a matrix. The lists
+# must all be the same length. NULL is replaced by NA.
+unpackMatrix <- function(data) {
+  if (length(data) == 0)
+    return(matrix(nrow=0, ncol=0))
+  
+  m <- matrix(unlist(lapply(data, function(x) {
+    sapply(x, function(y) {
+      ifelse(is.null(y), NA, y)
+    })
+  })), nrow = length(data[[1]]), ncol = length(data))
+  return(m)
+}
+
+# Combine dir and (file)name into a file path. If a file already exists with a
+# name differing only by case, then use it instead.
+file.path.ci <- function(dir, name) {
+  default <- file.path(dir, name)
+  if (file.exists(default))
+    return(default)
+  if (!file.exists(dir))
+    return(default)
+  
+  matches <- list.files(dir, name, ignore.case=TRUE, full.names=TRUE,
+                        include.dirs=TRUE)
+  if (length(matches) == 0)
+    return(default)
+  return(matches[[1]])
+}
+
+# Instantiates the app in the current working directory.
+# port - The TCP port that the application should listen on.
+startApp <- function(port=8101L) {
+
+  sys.www.root <- system.file('www', package='shiny')
+  
+  globalR <- file.path.ci(getwd(), 'global.R')
+  uiR <- file.path.ci(getwd(), 'ui.R')
+  serverR <- file.path.ci(getwd(), 'server.R')
+  wwwDir <- file.path.ci(getwd(), 'www')
+  
+  if (!file.exists(uiR) && !file.exists(wwwDir))
+    stop(paste("Neither ui.R nor a www subdirectory was found in", getwd()))
+  if (!file.exists(serverR))
+    stop(paste("server.R file was not found in", getwd()))
+  
+  if (file.exists(globalR))
+    source(globalR, local=F)
+  
+  shinyServer(NULL)
+  serverFileTimestamp <- NULL
+  local({
+    serverFileTimestamp <<- file.info(serverR)$mtime
+    source(serverR, local=T)
+    if (is.null(.globals$server))
+      stop("No server was defined in server.R")
+  })
+  serverFunc <- .globals$server
+  
+  ws_env <- create_server(
+    port=port,
+    webpage=httpServer(c(dynamicHandler(uiR),
+                         wwwDir,
+                         sys.www.root,
+                         resourcePathHandler)))
   
   set_callback('established', function(WS, ...) {
-    shinyapp <<- ShinyApp$new(WS)
+    shinyapp <- ShinyApp$new(WS)
+    apps$set(wsToKey(WS), shinyapp)
   }, ws_env)
   
-   set_callback('closed', function(WS, ...) {
-   }, ws_env)
+  set_callback('closed', function(WS, ...) {
+    apps$remove(wsToKey(WS))
+  }, ws_env)
   
   set_callback('receive', function(DATA, WS, ...) {
-    # cat(c("RECV", rawToChar(DATA), "\n"))
+    if (getOption('shiny.trace', F)) {
+      if (as.raw(0) %in% DATA)
+        message("RECV ", '$$binary data$$')
+      else
+        message("RECV ", rawToChar(DATA))
+    }
     
     if (identical(charToRaw("\003\xe9"), DATA))
       return()
     
-    msg <- fromJSON(rawToChar(DATA), asText=T, simplify=F)
+    shinyapp <- apps$get(wsToKey(WS))
+    
+    msg <- decodeMessage(DATA)
+
+    # Do our own list simplifying here. sapply/simplify2array give names to
+    # character vectors, which is rarely what we want.
+    if (!is.null(msg$data)) {
+      for (name in names(msg$data)) {
+        val <- msg$data[[name]]
+        
+        splitName <- strsplit(name, ':')[[1]]
+        if (length(splitName) > 1) {
+          msg$data[[name]] <- NULL
+          
+          # TODO: Make the below a user-extensible registry of deserializers
+          msg$data[[ splitName[[1]] ]] <- switch(
+            splitName[[2]],
+            matrix = unpackMatrix(val),
+            stop('Unknown type specified for ', name)
+          )
+        }
+        else if (is.list(val) && is.null(names(val)))
+          msg$data[[name]] <- unlist(val, recursive=F)
+      }
+    }
+    
     switch(
       msg$method,
       init = {
+        
+        # Check if server.R has changed, and if so, reload
+        mtime <- file.info(serverR)$mtime
+        if (!identical(mtime, serverFileTimestamp)) {
+          shinyServer(NULL)
+          local({
+            serverFileTimestamp <<- mtime
+            source(serverR, local=T)
+            if (is.null(.globals$server))
+              stop("No server was defined in server.R")
+          })
+          serverFunc <<- .globals$server
+        }
+        
         shinyapp$session$mset(msg$data)
-        flush.react()
+        flushReact()
         local({
-          define.shiny.output <- function(name, func) {
-            shinyapp$define.output(name, func)
-          }
-          define.shiny.plot <- function(name, func, ...) {
-            shinyapp$define.plot.output(name, func, ...)
-          }
-          define.shiny.table <- function(name, func) {
-            shinyapp$define.table.output(name, func)
-          }
-          get.shiny.input <- function(name) {
-            shinyapp$session$get(name)
-          }
-          
-          if (is.function(app))
-            app()
-          else if (is.character(app))
-            source(app, local=T)
-          else
-            warning("Don't know how to configure app; it's neither a function or filename!")
+          serverFunc(input=.createValuesReader(shinyapp$session),
+                     output=.createOutputWriter(shinyapp))
         })
-        shinyapp$instantiate.outputs()
       },
       update = {
         shinyapp$session$mset(msg$data)
-      })
-    flush.react()
-    shinyapp$flush.output()
+      },
+      shinyapp$dispatch(msg)
+    )
+    flushReact()
+    shinyapp$flushOutput()
   }, ws_env)
   
-  cat(paste('Listening on http://0.0.0.0:', port, "\n", sep=''))
+  message('\n', 'Listening on port ', port)
   
   return(ws_env)
 }
 
-run.app <- function(ws_env) {
-  while (T)
-    service(server=ws_env)
+# NOTE: we de-roxygenized this comment because the function isn't exported
+# Run an application that was created by \code{\link{startApp}}. This
+# function should normally be called in a \code{while(T)} loop.
+# 
+# @param ws_env The return value from \code{\link{startApp}}.
+serviceApp <- function(ws_env) {
+  if (timerCallbacks$executeElapsed()) {
+    flushReact()
+     lapply(apps$values(), function(shinyapp) {
+       shinyapp$flushOutput()
+       NULL
+     })
+  }
+
+  # If this R session is interactive, then call service() with a short timeout
+  # to keep the session responsive to user input
+  maxTimeout <- ifelse(interactive(), 100, 5000)
+  
+  timeout <- max(1, min(maxTimeout, timerCallbacks$timeToNextEvent()))
+  service(server=ws_env, timeout=timeout)
+}
+
+#' Run Shiny Application
+#' 
+#' Runs a Shiny application. This function normally does not return; interrupt
+#' R to stop the application (usually by pressing Ctrl+C or Esc).
+#' 
+#' @param appDir The directory of the application. Should contain
+#'   \code{server.R}, plus, either \code{ui.R} or a \code{www} directory that
+#'   contains the file \code{index.html}. Defaults to the working directory.
+#' @param port The TCP port that the application should listen on. Defaults to 
+#'   port 8100.
+#' @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.
+#'   
+#' @export
+runApp <- function(appDir=getwd(),
+                   port=8100L,
+                   launch.browser=getOption('shiny.launch.browser',
+                                            interactive())) {
+
+  # Make warnings print immediately
+  ops <- options(warn = 1)
+  on.exit(options(ops))
+  
+  orig.wd <- getwd()
+  setwd(appDir)
+  on.exit(setwd(orig.wd))
+  
+  ws_env <- startApp(port=port)
+  
+  if (launch.browser) {
+    appUrl <- paste("http://localhost:", port, sep="")
+    utils::browseURL(appUrl)
+  }
+  
+  tryCatch(
+    while (T) {
+      serviceApp(ws_env)
+    },
+    finally = {
+      websocket_close(ws_env)
+    }
+  )
+}
+
+#' Run Shiny Example Applications
+#' 
+#' Launch Shiny example applications, and optionally, your system's web browser.
+#' 
+#' @param example The name of the example to run, or \code{NA} (the default) to
+#'   list the available examples.
+#' @param port The TCP port that the application should listen on. Defaults to 
+#'   port 8100.
+#' @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.
+#'   
+#' @export
+runExample <- function(example=NA,
+                       port=8100L,
+                       launch.browser=getOption('shiny.launch.browser',
+                                                interactive())) {
+  examplesDir <- system.file('examples', package='shiny')
+  dir <- resolve(examplesDir, example)
+  if (is.null(dir)) {
+    if (is.na(example)) {
+      errFun <- message
+      errMsg <- ''
+    }
+    else {
+      errFun <- stop
+      errMsg <- paste('Example', example, 'does not exist. ')
+    }
+    
+    errFun(errMsg,
+           'Valid examples are "',
+           paste(list.files(examplesDir), collapse='", "'),
+           '"')
+  }
+  else {
+    runApp(dir, port = port, launch.browser = launch.browser)
+  }
+}
+
+# This is a wrapper for download.file and has the same interface.
+# The only difference is that, if the protocol is https, it changes the
+# download settings, depending on platform.
+download <- function(url, ...) {
+  # First, check protocol. If https, check platform:
+  if (grepl('^https://', url)) {
+    
+    # If Windows, call setInternet2, then use download.file with defaults.
+    if (.Platform$OS.type == "windows") {
+      # If we directly use setInternet2, R CMD CHECK gives a Note on Mac/Linux
+      mySI2 <- `::`(utils, 'setInternet2')
+      # Store initial settings
+      internet2_start <- mySI2(NA)
+      on.exit(mySI2(internet2_start))
+      
+      # Needed for https
+      mySI2(TRUE)
+      download.file(url, ...)
+      
+      # If non-Windows, check for curl/wget/lynx, then call download.file with
+      # appropriate method.
+    } else {
+      
+      if (system("wget --help > /dev/null") == 0L) 
+        method <- "wget"
+      else if (system("curl --help > /dev/null") == 0L) 
+        method <- "curl"
+      else if (system("lynx -help > /dev/null") == 0L) 
+        method <- "lynx"
+      else
+        stop("no download method found")
+      
+      download.file(url, method = method, ...)
+    }
+    
+  } else {
+    download.file(url, ...)
+  }
+}
+
+#' Run a Shiny application from https://gist.github.com
+#' 
+#' Download and launch a Shiny application that is hosted on GitHub as a gist.
+#' 
+#' @param gist The identifier of the gist. For example, if the gist is
+#'   https://gist.github.com/3239667, then \code{3239667}, \code{'3239667'}, and
+#'   \code{'https://gist.github.com/3239667'} are all valid values.
+#' @param port The TCP port that the application should listen on. Defaults to 
+#'   port 8100.
+#' @param launch.browser If true, the system's default web browser will be 
+#'   launched automatically after the app is started. Defaults to true in 
+#'   interactive sessions only.
+#'   
+#' @export
+runGist <- function(gist,
+                    port=8100L,
+                    launch.browser=getOption('shiny.launch.browser',
+                                             interactive())) {
+
+  gistUrl <- if (is.numeric(gist) || grepl('^[0-9a-f]+$', gist)) {
+    sprintf('https://gist.github.com/gists/%s/download', gist)
+  } else if(grepl('^https://gist.github.com/([0-9a-f]+)$', gist)) {
+    paste(sub('https://gist.github.com/',
+              'https://gist.github.com/gists/',
+              gist),
+          '/download',
+          sep='')
+  } else {
+    stop('Unrecognized gist identifier format')
+  }
+  filePath <- tempfile('shinygist', fileext='.tar.gz')
+  if (download(gistUrl, filePath, mode = "wb", quiet = TRUE) != 0)
+    stop("Failed to download URL ", gistUrl)
+  on.exit(unlink(filePath))
+  
+  dirname <- untar(filePath, list=TRUE)[1]
+  untar(filePath, exdir=dirname(filePath))
+  
+  appdir <- file.path(dirname(filePath), dirname)
+  on.exit(unlink(appdir, recursive = TRUE))
+  
+  shiny::runApp(appdir, port=port, launch.browser=launch.browser)
 }

R/shinyui.R

@@ -0,0 +1,177 @@
+
+#' @export
+p <- function(...) tags$p(...)
+
+#' @export
+h1 <- function(...) tags$h1(...)
+
+#' @export
+h2 <- function(...) tags$h2(...)
+
+#' @export
+h3 <- function(...) tags$h3(...)
+
+#' @export
+h4 <- function(...) tags$h4(...)
+
+#' @export
+h5 <- function(...) tags$h5(...)
+
+#' @export
+h6 <- function(...) tags$h6(...)
+
+#' @export
+a <- function(...) tags$a(...)
+
+#' @export
+br <- function(...) tags$br(...)
+
+#' @export
+div <- function(...) tags$div(...)
+
+#' @export
+span <- function(...) tags$span(...)
+
+#' @export
+pre <- function(...) tags$pre(...)
+
+#' @export
+code <- function(...) tags$code(...)
+
+#' @export
+img <- function(...) tags$img(...)
+
+#' @export
+strong <- function(...) tags$strong(...)
+
+#' @export
+em <- function(...) tags$em(...)
+
+
+#' Include Content Only Once
+#' 
+#' Use \code{singleton} to wrap contents (tag, text, HTML, or lists) that should
+#' be included in the generated document only once, yet may appear in the 
+#' document-generating code more than once. Only the first appearance of the 
+#' content (in document order) will be used. Useful for custom components that 
+#' have JavaScript files or stylesheets.
+#' 
+#' @param x A \code{\link{tag}}, text, \code{\link{HTML}}, or list.
+#'
+#' @export
+singleton <- function(x) {
+  class(x) <- c(class(x), 'shiny.singleton')
+  return(x)
+}
+
+renderPage <- function(ui, connection) {
+  
+  # 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$name, "head")) {
+      textConn <- textConnection(NULL, "w") 
+      textConnWriter <- function(text) cat(text, file = textConn)
+      tagWriteChildren(content, textConnWriter, 1, context)
+      context$head <- append(context$head, textConnectionValue(textConn))
+      close(textConn)
+      return (FALSE)
+    }
+    else {
+      return (TRUE)
+    }
+  }
+  
+  # write ui HTML to a character vector
+  textConn <- textConnection(NULL, "w") 
+  tagWrite(ui, function(text) cat(text, file = textConn), 0, context)
+  uiHTML <- textConnectionValue(textConn)
+  close(textConn)
+ 
+  # write preamble
+  writeLines(c('<!DOCTYPE html>',
+               '<html>',
+               '<head>',
+               '   <meta http-equiv="Content-Type" content="text/html; charset=utf-8"/>',
+               '   <script src="shared/jquery.js" type="text/javascript"></script>',
+               '   <script src="shared/shiny.js" type="text/javascript"></script>',
+               '   <link rel="stylesheet" type="text/css" href="shared/shiny.css"/>',
+               context$head,
+               '</head>',
+               '<body>', 
+               recursive=TRUE),
+             con = connection)
+  
+  # write UI html to connection
+  writeLines(uiHTML, con = connection)
+  
+  # write end document
+  writeLines(c('</body>',
+               '</html>'),
+             con = connection)
+}
+
+#' Create a Shiny UI handler
+#' 
+#' 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, 
+#'                 value = 500)
+#'   ),
+#'   
+#'   # Show a plot of the generated distribution
+#'   mainPanel(
+#'     plotOutput("distPlot")
+#'   )
+#' ))
+#'
+#' @export
+shinyUI <- function(ui, path='/') {
+  
+  registerClient({
+    
+    function(ws, header) {
+      if (header$RESOURCE != path)
+        return(NULL)
+      
+      textConn <- textConnection(NULL, "w") 
+      on.exit(close(textConn))
+      
+      renderPage(ui, textConn)
+      html <- paste(textConnectionValue(textConn), collapse='\n')
+      return(httpResponse(200, content=html))
+    }
+  })
+}
+

R/shinywrappers.R

@@ -0,0 +1,162 @@
+suppressPackageStartupMessages({
+  library(caTools)
+  library(xtable)
+})
+
+#' Plot Output
+#' 
+#' Creates 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}.
+#' 
+#' @param func A function 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.
+#' @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.
+#' @param ... Arguments to be passed through to \code{\link[grDevices]{png}}. 
+#'   These can be used to set the width, height, background color, etc.
+#'   
+#' @export
+reactivePlot <- function(func, width='auto', height='auto', ...) {
+  args <- list(...)
+  
+  return(function(shinyapp, name, ...) {
+    png.file <- tempfile(fileext='.png')
+    
+    # Note that these are reactive calls. A change to the width and height
+    # will inherently cause a reactive plot to redraw (unless width and 
+    # height were explicitly specified).
+    prefix <- '.shinyout_'
+    if (width == 'auto')
+      width <- shinyapp$session$get(paste(prefix, name, '_width', sep=''));
+    if (height == 'auto')
+      height <- shinyapp$session$get(paste(prefix, name, '_height', sep=''));
+    
+    if (width <= 0 || height <= 0)
+      return(NULL)
+    
+    do.call(png, c(args, filename=png.file, width=width, height=height))
+    tryCatch(
+      func(),
+      finally=dev.off())
+    
+    bytes <- file.info(png.file)$size
+    if (is.na(bytes))
+      return(NULL)
+    
+    b64 <- base64encode(readBin(png.file, 'raw', n=bytes))
+    return(paste("data:image/png;base64,", b64, sep=''))
+  })
+}
+
+#' 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 func A function 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}}.
+#'   
+#' @export
+reactiveTable <- function(func, ...) {
+  reactive(function() {
+    classNames <- getOption('shiny.table.class', 'data table table-bordered table-condensed')
+    data <- func()
+
+    if (is.null(data) || is.na(data))
+      return("")
+    
+    return(paste(
+      capture.output(
+        print(xtable(data, ...), 
+              type='html', 
+              html.table.attributes=paste('class="',
+                                          htmlEscape(classNames, T),
+                                          '"',
+                                          sep=''))),
+      collapse="\n"))
+  })
+}
+
+#' Printable Output
+#' 
+#' Makes a reactive version of the given function that also turns its printable
+#' result into a string. The reactive function is suitable for assigning to an 
+#' \code{output} slot.
+#' 
+#' 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 
+#' \code{\link[utils]{capture.output}} call.
+#' 
+#' @param func A function that returns a printable R object.
+#'   
+#' @export
+reactivePrint <- function(func) {
+  reactive(function() {
+    return(paste(capture.output(print(func())), collapse="\n"))
+  })
+}
+
+#' 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 
+#' vector.
+#' 
+#' 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 
+#' \code{\link[utils]{capture.output}} call.
+#' 
+#' @param func A function that returns an R object that can be used as an
+#'   argument to \code{cat}.
+#'   
+#' @export
+reactiveText <- function(func) {
+  reactive(function() {
+    return(paste(capture.output(cat(func())), collapse="\n"))
+  })
+}
+
+#' 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 func A function that returns a Shiny tag object, \code{\link{HTML}}, 
+#'   or a list of such objects.
+#'   
+#' @seealso conditionalPanel
+#'   
+#' @export
+#' @examples
+#' \dontrun{
+#'   output$moreControls <- reactiveUI(function() {
+#'     list(
+#'       
+#'     )
+#'   })
+#' }
+reactiveUI <- function(func) {
+  reactive(function() {
+    result <- func()
+    if (is.null(result) || length(result) == 0)
+      return(NULL)
+    return(as.character(result))
+  })
+}

R/slider.R

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

R/tags.R

@@ -0,0 +1,380 @@
+
+
+htmlEscape <- local({
+  .htmlSpecials <- list(
+    `&` = '&amp;',
+    `<` = '&lt;',
+    `>` = '&gt;'
+  )
+  .htmlSpecialsPattern <- paste(names(.htmlSpecials), collapse='|')
+  .htmlSpecialsAttrib <- c(
+    .htmlSpecials,
+    `'` = '&#39;',
+    `"` = '&quot;',
+    `\r` = '&#13;',
+    `\n` = '&#10;'
+  )
+  .htmlSpecialsPatternAttrib <- paste(names(.htmlSpecialsAttrib), collapse='|')
+  
+  function(text, attribute=T) {
+    pattern <- if(attribute)
+      .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=T)
+    }
+    
+    return(text)
+  }
+})
+
+isTag <- function(x) {
+  inherits(x, "shiny.tag")
+}
+
+#' @S3method print shiny.tag
+print.shiny.tag <- function(x, ...) {
+  print(as.character(x), ...)
+}
+
+#' @S3method format shiny.tag
+format.shiny.tag <- function(x, ...) {
+  as.character.shiny.tag(x)
+}
+
+#' @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), collapse='\n')))
+}
+
+#' @S3method print shiny.tag.list
+print.shiny.tag.list <- print.shiny.tag
+
+#' @S3method format shiny.tag.list
+format.shiny.tag.list <- format.shiny.tag
+
+#' @S3method as.character shiny.tag.list
+as.character.shiny.tag.list <- as.character.shiny.tag
+
+normalizeText <- function(text) {
+  if (!is.null(attr(text, "html")))
+    text
+  else
+    htmlEscape(text, attribute=FALSE)
+  
+}
+
+#' @export
+tagList <- function(...) {
+  lst <- list(...)
+  class(lst) <- c("shiny.tag.list", "list")
+  return(lst)
+}
+
+#' @export
+tagAppendChild <- function(tag, child) {
+  tag$children[[length(tag$children)+1]] <- child
+  tag
+}
+
+#' @export
+tag <- function(`_tag_name`, varArgs) {
+  
+  # create basic tag data structure
+  tag <- list()
+  class(tag) <- "shiny.tag"
+  tag$name <- `_tag_name`
+  tag$attribs <- list()
+  tag$children <- list()
+  
+  # process varArgs
+  varArgsNames <- names(varArgs)
+  if (is.null(varArgsNames))
+    varArgsNames <- character(length=length(varArgs))
+  
+  if (length(varArgsNames) > 0) {
+    for (i in 1:length(varArgsNames)) {
+      # save name and value
+      name <- varArgsNames[[i]]
+      value <- varArgs[[i]]
+      
+      # process attribs
+      if (nzchar(name))
+        tag$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)
+}
+
+tagWriteChildren <- function(tag, textWriter, indent, context) {
+  for (child in tag$children) {
+    if (isTag(child)) {
+      tagWrite(child, textWriter, indent, context)
+    }
+    else {
+      # first call optional filter -- exit function if it returns false
+      if (is.null(context) || is.null(context$filter) || context$filter(child)) {
+        child <- normalizeText(child)
+        indentText <- paste(rep(" ", indent*3), collapse="")
+        textWriter(paste(indentText, child, "\n", sep=""))
+      }
+    }
+  }
+}
+
+tagWrite <- function(tag, textWriter, indent=0, context = NULL) {
+  
+  # optionally process a list of tags
+  if (!isTag(tag) && is.list(tag)) {
+    sapply(tag, function(t) tagWrite(t, textWriter, indent, context))
+    return (NULL)
+  }
+  
+  # first call optional filter -- exit function if it returns false
+  if (!is.null(context) && !is.null(context$filter) && !context$filter(tag))
+    return (NULL)
+  
+  # compute indent text
+  indentText <- paste(rep(" ", indent*3), collapse="")
+  
+  # write tag name
+  textWriter(paste(indentText, "<", tag$name, sep=""))
+  
+  # write attributes
+  for (attrib in names(tag$attribs)) {
+    attribValue <- tag$attribs[[attrib]]
+    if (!is.na(attribValue)) {
+      if (is.logical(attribValue))
+        attribValue <- tolower(attribValue)
+      text <- htmlEscape(attribValue, attribute=TRUE) 
+      textWriter(paste(" ", attrib,"=\"", text, "\"", sep=""))
+    }
+    else {
+      textWriter(paste(" ", attrib, sep=""))
+    }
+  }
+  
+  # write any children
+  if (length(tag$children) > 0) {
+    
+    # special case for a single child text node (skip newlines and indentation)
+    if ((length(tag$children) == 1) && is.character(tag$children[[1]]) ) {
+      if (is.null(context) || is.null(context$filter) 
+          || context$filter(tag$children[[1]])) {
+        text <- normalizeText(tag$children[[1]])
+        textWriter(paste(">", text, "</", tag$name, ">\n", sep=""))
+      }
+    }
+    else {
+      textWriter(">\n")
+      tagWriteChildren(tag, textWriter, indent+1, context)
+      textWriter(paste(indentText, "</", tag$name, ">\n", sep=""))
+    }
+  }
+  else {
+    # only self-close void elements 
+    # (see: http://dev.w3.org/html5/spec/single-page.html#void-elements)
+    if (tag$name %in% c("area", "base", "br", "col", "command", "embed", "hr", 
+                        "img", "input", "keygen", "link", "meta", "param",
+                        "source", "track", "wbr")) {
+      textWriter("/>\n")
+    }
+    else {
+      textWriter(paste("></", tag$name, ">\n", sep=""))
+    }
+  }
+}
+
+
+
+# environment used to store all available tags
+#' @export
+tags <- new.env()
+tags$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(...))
+
+#' 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
+  htmlText
+}
+
+

R/timer.R

@@ -0,0 +1,67 @@
+# Return the current time, in milliseconds from epoch, with
+# unspecified time zone.
+now <- function() {
+  as.numeric(Sys.time()) * 1000
+}
+
+TimerCallbacks <- setRefClass(
+  'TimerCallbacks',
+  fields = list(
+    .nextId = 'integer',
+    .funcs = 'Map',
+    .times = 'data.frame'
+  ),
+  methods = list(
+    initialize = function() {
+      .nextId <<- 0L
+    },
+    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() {
+      if (dim(.times)[1] == 0)
+        return(Inf)
+      return(.times[1, 'time'] - now())
+    },
+    takeElapsed = function() {
+      t <- now()
+      elapsed <- .times$time < now()
+      result <- .times[elapsed,]
+      .times <<- .times[!elapsed,]
+      
+      # TODO: Examine scheduled column to check if any funny business
+      #       has occurred with the system clock (e.g. if scheduled
+      #       is later than now())
+      
+      return(result)
+    },
+    executeElapsed = function() {
+      elapsed <- takeElapsed()
+      if (length(elapsed) == 0)
+        return(F)
+      
+      for (id in elapsed$id) {
+        thisFunc <- .funcs$remove(as.character(id))
+        # TODO: Catch exception, and...?
+        # TODO: Detect NULL, and...?
+        thisFunc()
+      }
+      return(T)
+    }
+  )
+)
+
+timerCallbacks <- TimerCallbacks$new()

README.md

@@ -1,10 +1,38 @@
-# Shiny
-### A web framework for R (eventually--Ruby for now)
+# Shiny 
 
-```sh
-sudo apt-get install ruby1.9.1 ruby1.9.1-dev
-sudo gem install bundler
-cd shiny
-bundle install --path vendor
-./run.sh
-```
+Shiny is a new package from RStudio that makes it incredibly easy to build interactive web applications with R.
+
+## Features
+
+* Build useful web applications with only a few lines of code—no JavaScript required.
+* Shiny applications are automatically "live" in the same way that spreadsheets are live. Outputs change instantly as users modify inputs, without requiring a reload of the browser.
+* Shiny user interfaces can be built entirely using R, or can be written directly in HTML, CSS, and JavaScript for more flexibility.
+* Works in any R environment (Console R, Rgui for Windows or Mac, ESS, StatET, RStudio, etc.)
+* Attractive default UI theme based on [Twitter Bootstrap](http://twitter.github.com/bootstrap).
+* 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.
+* 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:
+
+```r
+options(repos=c(RStudio="http://rstudio.org/_packages", getOption("repos")))
+install.packages("shiny")
+```
+
+## Getting Started
+
+To learn more we highly recommend you check out the [Shiny Tutorial](http://rstudio.github.com/shiny/tutorial). The tutorial explains the framework in-depth, walks you through building a simple application, and includes extensive annotated examples.
+
+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.
+
+## License
+
+The shiny package is licensed under the GPLv3. See these files in the inst directory for additional details:
+
+- COPYING - shiny package license (GPLv3)
+- NOTICE  - Copyright notices for additional included software

examples/02_hash/app.R

@@ -1,15 +0,0 @@
-library(digest)
-
-input <- Observable$new(function() {
-  str <- get.shiny.input('input1')
-  if (get.shiny.input('addnewline'))
-    str <- paste(str, "\n", sep='')
-  return(str)
-})
-
-define.shiny.output('md5_hash', function() {
-  digest(input$get.value(), algo='md5', serialize=F)
-})
-define.shiny.output('sha1_hash', function() {
-  digest(input$get.value(), algo='sha1', serialize=F)
-})

examples/02_hash/www/index.html

@@ -1,26 +0,0 @@
-<html>
-<head>
-  <script src="shared/jquery-1.7.2.js" type="text/javascript"></script>
-  <script src="shared/shiny.js" type="text/javascript"></script>
-  <link rel="stylesheet" type="text/css" href="shared/shiny.css"/>
-</head>
-<body>
-  <h1>Example 2: Hash Calculation</h1>
-
-  <p>
-    <label>Input:</label><br />
-    <input name="input1" value="Hello World!"/>
-    <input type="checkbox" name="addnewline" checked="checked"/> Append newline
-  </p>
-
-  <p>
-    <label>MD5:</label><br />
-    <pre id="md5_hash" class="live-text"></pre>
-  </p>
-
-  <p>
-    <label>SHA-1:</label><br />
-    <pre id="sha1_hash" class="live-text"></pre>
-  </p>
-</body>
-</html>

examples/03_distributions/app.R

@@ -1,24 +0,0 @@
-data <- Observable$new(function() {
-  # Choose a distribution function
-  dist <- switch(get.shiny.input('dist'),
-                 norm = rnorm,
-                 unif = runif,
-                 lnorm = rlnorm,
-                 exp = rexp,
-                 rnorm)
-  
-  # Generate n values from the distribution function
-  dist(max(1, get.shiny.input('n')))
-})
-
-define.shiny.plot('plot1', function() {
-  dist <- get.shiny.input('dist')
-  n <- get.shiny.input('n')
-  
-  hist(data$get.value(), 
-       main=paste('r', dist, '(', n, ')', sep=''))
-}, width=600, height=300)
-
-define.shiny.table('table1', function() {
-  data.frame(x=data$get.value())
-})

hash.rb

@@ -1,19 +0,0 @@
-require 'shiny'
-require 'digest/sha1'
-require 'digest/md5'
-
-shinyapp = ShinyApp.new
-
-input1 = React::ObservableValue.new {
-  shinyapp.session.get('input1') + (shinyapp.session.get('addnewline') ? "\n" : '')
-}
-
-shinyapp.define_output('md5_hash') do
-  Digest::MD5.hexdigest(input1.value)
-end
-
-shinyapp.define_output('sha1_hash') do
-  Digest::SHA1.hexdigest(input1.value)
-end
-
-shinyapp.run

inst/COPYING

@@ -0,0 +1,678 @@
+The shiny package is licensed to you under the GPLv3, the terms of 
+which are included below. The markdown pacakge includes other open 
+source software whose license terms can be found in the file NOTICE.
+
+                    GNU GENERAL PUBLIC LICENSE
+                       Version 3, 29 June 2007
+
+ Copyright (C) 2007 Free Software Foundation, Inc. <http://fsf.org/>
+ Everyone is permitted to copy and distribute verbatim copies
+ of this license document, but changing it is not allowed.
+
+                            Preamble
+
+  The GNU General Public License is a free, copyleft license for
+software and other kinds of works.
+
+  The licenses for most software and other practical works are designed
+to take away your freedom to share and change the works.  By contrast,
+the GNU General Public License is intended to guarantee your freedom to
+share and change all versions of a program--to make sure it remains free
+software for all its users.  We, the Free Software Foundation, use the
+GNU General Public License for most of our software; it applies also to
+any other work released this way by its authors.  You can apply it to
+your programs, too.
+
+  When we speak of free software, we are referring to freedom, not
+price.  Our General Public Licenses are designed to make sure that you
+have the freedom to distribute copies of free software (and charge for
+them if you wish), that you receive source code or can get it if you
+want it, that you can change the software or use pieces of it in new
+free programs, and that you know you can do these things.
+
+  To protect your rights, we need to prevent others from denying you
+these rights or asking you to surrender the rights.  Therefore, you have
+certain responsibilities if you distribute copies of the software, or if
+you modify it: responsibilities to respect the freedom of others.
+
+  For example, if you distribute copies of such a program, whether
+gratis or for a fee, you must pass on to the recipients the same
+freedoms that you received.  You must make sure that they, too, receive
+or can get the source code.  And you must show them these terms so they
+know their rights.
+
+  Developers that use the GNU GPL protect your rights with two steps:
+(1) assert copyright on the software, and (2) offer you this License
+giving you legal permission to copy, distribute and/or modify it.
+
+  For the developers' and authors' protection, the GPL clearly explains
+that there is no warranty for this free software.  For both users' and
+authors' sake, the GPL requires that modified versions be marked as
+changed, so that their problems will not be attributed erroneously to
+authors of previous versions.
+
+  Some devices are designed to deny users access to install or run
+modified versions of the software inside them, although the manufacturer
+can do so.  This is fundamentally incompatible with the aim of
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+pattern of such abuse occurs in the area of products for individuals to
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+
+  Finally, every program is threatened constantly by software patents.
+States should not allow patents to restrict development and use of
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+patents cannot be used to render the program non-free.
+
+  The precise terms and conditions for copying, distribution and
+modification follow.
+
+                       TERMS AND CONDITIONS
+
+  0. Definitions.
+
+  "This License" refers to version 3 of the GNU General Public License.
+
+  "Copyright" also means copyright-like laws that apply to other kinds of
+works, such as semiconductor masks.
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+  "The Program" refers to any copyrightable work licensed under this
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+
+  A "covered work" means either the unmodified Program or a work based
+on the Program.
+
+  To "propagate" a work means to do anything with it that, without
+permission, would make you directly or secondarily liable for
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+  To "convey" a work means any kind of propagation that enables other
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+  An interactive user interface displays "Appropriate Legal Notices"
+to the extent that it includes a convenient and prominently visible
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+  The "source code" for a work means the preferred form of the work
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+Public License instead of this License.  But first, please read
+<http://www.gnu.org/philosophy/why-not-lgpl.html>.

inst/NOTICE

@@ -0,0 +1,264 @@
+The shiny package inludes other open source software components. The following
+is a list of these components (full copies of the license agreements used by
+these components are included below):
+
+- jQuery
+- Bootstrap
+- jslider
+
+
+jQuery License
+----------------------------------------------------------------------   
+
+Copyright (c) 2012 jQuery Foundation and other contributors, 
+http://jquery.com/
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
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+distribute, sublicense, and/or sell copies of the Software, and to
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+
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+included in all copies or substantial portions of the Software.
+
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+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+
+
+Bootstrap License
+----------------------------------------------------------------------   
+
+                                 Apache License
+                           Version 2.0, January 2004
+                        http://www.apache.org/licenses/
+
+   TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
+
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+   END OF TERMS AND CONDITIONS
+
+   APPENDIX: How to apply the Apache License to your work.
+
+      To apply the Apache License to your work, attach the following
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+
+
+jslider License
+----------------------------------------------------------------------   
+
+The MIT License (MIT)
+Copyright (c) 2012 Egor Khmelev
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+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/examples/01_hello/server.R

@@ -0,0 +1,20 @@
+library(shiny)
+
+# Define server logic required to generate and plot a random distribution
+shinyServer(function(input, output) {
+   
+  # Function that generates a plot of the distribution. The function
+  # is wrapped in a call to reactivePlot to indicate that:
+  #
+  #  1) It is "reactive" and therefore should be automatically 
+  #     re-executed when inputs change
+  #  2) Its output type is a plot 
+  #
+  output$distPlot <- reactivePlot(function() {
+        
+    # generate an rnorm distribution and plot it
+    dist <- rnorm(input$obs)
+    hist(dist)
+  })
+  
+})

inst/examples/01_hello/ui.R

@@ -0,0 +1,22 @@
+library(shiny)
+
+# Define UI for application that plots random distributions 
+shinyUI(pageWithSidebar(
+  
+  # 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")
+  )
+))

inst/examples/02_text/server.R

@@ -0,0 +1,25 @@
+library(shiny)
+library(datasets)
+
+# Define server logic required to summarize and view the selected dataset
+shinyServer(function(input, output) {
+  
+  # Return the requested dataset
+  datasetInput <- reactive(function() {
+    switch(input$dataset,
+           "rock" = rock,
+           "pressure" = pressure,
+           "cars" = cars)
+  })
+  
+  # Generate a summary of the dataset
+  output$summary <- reactivePrint(function() {
+    dataset <- datasetInput()
+    summary(dataset)
+  })
+  
+  # Show the first "n" observations
+  output$view <- reactiveTable(function() {
+    head(datasetInput(), n = input$obs)
+  })
+})

inst/examples/02_text/ui.R

@@ -0,0 +1,25 @@
+library(shiny)
+
+# Define UI for dataset viewer application
+shinyUI(pageWithSidebar(
+  
+  # Application title
+  headerPanel("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")),
+    
+    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")
+  )
+))

inst/examples/03_reactivity/server.R

@@ -0,0 +1,50 @@
+library(shiny)
+library(datasets)
+
+# Define server logic required to summarize and view the selected dataset
+shinyServer(function(input, output) {
+
+  # By declaring databaseInput as a reactive function 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 function is re-executed, the
+  #     new result is compared to the previous result; if the two are
+  #     identical, then the callers are not notified
+  #
+  datasetInput <- reactive(function() {
+    switch(input$dataset,
+           "rock" = rock,
+           "pressure" = pressure,
+           "cars" = cars)
+  })
+  
+  # The output$caption is computed based on a reactive function that
+  # returns input$caption. When the user changes the "caption" field:
+  #
+  #  1) This function is automatically called to recompute the output 
+  #  2) The new caption is pushed back to the browser for re-display
+  # 
+  # Note that because the data-oriented reactive functions below don't 
+  # depend on input$caption, those functions are NOT called when 
+  # input$caption changes.
+  output$caption <- reactiveText(function() {
+    input$caption
+  })
+  
+  # The output$summary depends on the datasetInput reactive function, 
+  # so will be re-executed whenever datasetInput is re-executed 
+  # (i.e. whenever the input$dataset changes)
+  output$summary <- reactivePrint(function() {
+    dataset <- datasetInput()
+    summary(dataset)
+  })
+  
+  # The output$view depends on both the databaseInput reactive function
+  # and input$obs, so will be re-executed whenever input$dataset or 
+  # input$obs is changed. 
+  output$view <- reactiveTable(function() {
+    head(datasetInput(), n = input$obs)
+  })
+})

inst/examples/03_reactivity/ui.R

@@ -0,0 +1,32 @@
+library(shiny)
+
+# Define UI for dataset viewer application
+shinyUI(pageWithSidebar(
+  
+  # Application title
+  headerPanel("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"),
+    
+    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")
+  )
+))

inst/examples/04_mpg/server.R

@@ -0,0 +1,32 @@
+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
+mpgData <- mtcars
+mpgData$am <- factor(mpgData$am, labels = c("Automatic", "Manual"))
+
+
+# Define server logic required to plot various variables against mpg
+shinyServer(function(input, output) {
+  
+  # Compute the forumla text in a reactive function since it is 
+  # shared by the output$caption and output$mpgPlot functions
+  formulaText <- reactive(function() {
+    paste("mpg ~", input$variable)
+  })
+   
+  # Return the formula text for printing as a caption
+  output$caption <- reactiveText(function() {
+    formulaText()
+  })
+  
+  # Generate a plot of the requested variable against mpg and only 
+  # include outliers if requested
+  output$mpgPlot <- reactivePlot(function() {
+    boxplot(as.formula(formulaText()), 
+            data = mpgData,
+            outline = input$outliers)
+  })
+})

inst/examples/04_mpg/ui.R

@@ -0,0 +1,26 @@
+library(shiny)
+
+# Define UI for miles per gallon application
+shinyUI(pageWithSidebar(
+  
+  # Application title
+  headerPanel("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:",
+                list("Cylinders" = "cyl", 
+                     "Transmission" = "am", 
+                     "Gears" = "gear")),
+    
+    checkboxInput("outliers", "Show outliers", FALSE)
+  ),
+  
+  # Show the caption and plot of the requested variable against mpg
+  mainPanel(
+    h3(textOutput("caption")),
+    
+    plotOutput("mpgPlot")
+  )
+))

inst/examples/05_sliders/server.R

@@ -0,0 +1,28 @@
+library(shiny)
+
+# Define server logic for slider examples
+shinyServer(function(input, output) {
+  
+  # Reactive function to compose a data frame containing all of the values
+  sliderValues <- reactive(function() {
+    
+    # Compose data frame
+    data.frame(
+      Name = c("Integer", 
+               "Decimal",
+               "Range",
+               "Custom Format",
+               "Animation"),
+      Value = as.character(c(input$integer, 
+                             input$decimal,
+                             paste(input$range, collapse=' '),
+                             input$format,
+                             input$animation)), 
+      stringsAsFactors=FALSE)
+  }) 
+  
+  # Show the values using an HTML table
+  output$values <- reactiveTable(function() {
+    sliderValues()
+  })
+})

inst/examples/05_sliders/ui.R

@@ -0,0 +1,37 @@
+library(shiny)
+
+# Define UI for slider demo application
+shinyUI(pageWithSidebar(
+  
+  #  Application title
+  headerPanel("Sliders"),
+  
+  # Sidebar with sliders that demonstrate various available options
+  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=T))
+  ),
+  
+  # Show a table summarizing the values entered
+  mainPanel(
+    tableOutput("values")
+  )
+))

inst/examples/06_tabsets/server.R

@@ -0,0 +1,42 @@
+library(shiny)
+
+# Define server logic for random distribution application
+shinyServer(function(input, output) {
+  
+  # Reactive function 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 function
+  data <- reactive(function() {  
+    dist <- switch(input$dist,
+                   norm = rnorm,
+                   unif = runif,
+                   lnorm = rlnorm,
+                   exp = rexp,
+                   rnorm)
+    
+    dist(input$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 function are both tracked, and all functions 
+  # are called in the sequence implied by the dependency graph
+  output$plot <- reactivePlot(function() {
+    dist <- input$dist
+    n <- input$n
+    
+    hist(data(), 
+         main=paste('r', dist, '(', n, ')', sep=''))
+  })
+  
+  # Generate a summary of the data
+  output$summary <- reactivePrint(function() {
+    summary(data())
+  })
+  
+  # Generate an HTML table view of the data
+  output$table <- reactiveTable(function() {
+    data.frame(x=data())
+  })
+  
+})

inst/examples/06_tabsets/ui.R

@@ -0,0 +1,36 @@
+library(shiny)
+
+# Define UI for random distribution application 
+shinyUI(pageWithSidebar(
+    
+  # Application title
+  headerPanel("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:",
+                 list("Normal" = "norm",
+                      "Uniform" = "unif",
+                      "Log-normal" = "lnorm",
+                      "Exponential" = "exp")),
+    br(),
+    
+    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"))
+    )
+  )
+))

inst/examples/07_widgets/server.R

@@ -0,0 +1,25 @@
+library(shiny)
+library(datasets)
+
+# Define server logic required to summarize and view the selected dataset
+shinyServer(function(input, output) {
+  
+  # Return the requested dataset
+  datasetInput <- reactive(function() {
+    switch(input$dataset,
+           "rock" = rock,
+           "pressure" = pressure,
+           "cars" = cars)
+  })
+  
+  # Generate a summary of the dataset
+  output$summary <- reactivePrint(function() {
+    dataset <- datasetInput()
+    summary(dataset)
+  })
+  
+  # Show the first "n" observations
+  output$view <- reactiveTable(function() {
+    head(datasetInput(), n = input$obs)
+  })
+})

inst/examples/07_widgets/ui.R

@@ -0,0 +1,39 @@
+library(shiny)
+
+# Define UI for dataset viewer application
+shinyUI(pageWithSidebar(
+  
+  # Application title.
+  headerPanel("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")),
+    
+    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")
+  )
+))

inst/examples/08_html/server.R

@@ -0,0 +1,42 @@
+library(shiny)
+
+# Define server logic for random distribution application
+shinyServer(function(input, output) {
+  
+  # Reactive function to generate the requested distribution. This is 
+  # called whenever the inputs change. The output functions defined 
+  # below then all used the value computed from this function
+  data <- reactive(function() {  
+    dist <- switch(input$dist,
+                   norm = rnorm,
+                   unif = runif,
+                   lnorm = rlnorm,
+                   exp = rexp,
+                   rnorm)
+    
+    dist(input$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 function are both tracked, and all functions 
+  # are called in the sequence implied by the dependency graph
+  output$plot <- reactivePlot(function() {
+    dist <- input$dist
+    n <- input$n
+    
+    hist(data(), 
+         main=paste('r', dist, '(', n, ')', sep=''))
+  })
+  
+  # Generate a summary of the data
+  output$summary <- reactivePrint(function() {
+    summary(data())
+  })
+  
+  # Generate an HTML table view of the data
+  output$table <- reactiveTable(function() {
+    data.frame(x=data())
+  })
+  
+})

inst/examples/08_html/www/index.html

@@ -1,12 +1,15 @@
 <html>
-<head>
-  <script src="shared/jquery-1.7.2.js" type="text/javascript"></script>
-  <script src="shared/shiny.js" type="text/javascript"></script>
-  <link rel="stylesheet" type="text/css" href="shared/shiny.css"/>
-</head>
-<body>
-  <h1>Example 3: Distributions</h1>
 
+<head>
+  <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"/> 
+</head>
+ 
+<body>
+
+  <h1>HTML UI</h1>
+ 
   <p>
     <label>Distribution type:</label><br />
     <select name="dist">
@@ -14,17 +17,22 @@
       <option value="unif">Uniform</option>
       <option value="lnorm">Log-normal</option>
       <option value="exp">Exponential</option>
-    </select>
+    </select> 
   </p>
-
+ 
   <p>
-    <label>Number of observations:</label><br />
-    <input type="numeric" name="n" value="500" />
-  </p>
+ 
+    <label>Number of observations:</label><br /> 
+    <input type="number" name="n" value="500" min="1" max="1000" />
 
-  <div id="plot1" class="live-plot"></div>
+  </p>
+ 
+  <pre id="summary" class="shiny-text-output"></pre> 
   
-  <div id="table1" class="live-html"></div>
+  <div id="plot" class="shiny-plot-output" 
+       style="width: 100%; height: 400px"></div> 
   
+  <div id="table" class="shiny-html-output"></div>
+ 
 </body>
-</html>
+</html>

inst/examples/09_upload/server.R

@@ -0,0 +1,18 @@
+library(shiny)
+
+shinyServer(function(input, output) {
+  output$contents <- reactiveTable(function() {
+    
+    # input$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.
+
+    inFile <- input$file1
+
+    if (is.null(inFile))
+      return(NULL)
+    
+    read.csv(inFile$data, header=input$header, sep=input$sep, quote=input$quote)
+  })
+})

inst/examples/09_upload/ui.R

@@ -0,0 +1,24 @@
+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',
+                 list(Comma=',',
+                      Semicolon=';',
+                      Tab='\t'),
+                 'Comma'),
+    radioButtons('quote', 'Quote',
+                 list(None='',
+                      'Double Quote'='"',
+                      'Single Quote'="'"),
+                 'Double Quote')
+  ),
+  mainPanel(
+    tableOutput('contents')
+  )
+))

inst/www/index.html

@@ -0,0 +1,12 @@
+<!DOCTYPE html>
+<html>
+<head></head>
+<body>
+  <h1>No UI defined</h1>
+  <p>Shiny couldn't find any UI for this application. We looked in:</p>
+  <ul>
+    <li><code>www/index.html</code></li>
+    <li><code>ui.R</code></li>
+  </ul>
+</body>
+</html>

inst/www/shared/shiny.css

@@ -0,0 +1,56 @@
+body.disconnected {
+  background-color: #999;
+  opacity: 0.5;
+}
+
+table.data {
+  width: auto;
+}
+table.data td[align=right] {
+  font-family: monospace;
+  text-align: right;
+}
+
+.shiny-output-error {
+  color: red;
+}
+
+.jslider {
+  /* Fix jslider running into the control above it */
+  margin-top: 18px;
+}
+.jslider-value {
+  /* Remove box around jslider values on colored bg */
+  background-color: transparent !important;
+}
+
+.recalculating {
+  opacity: 0.3;
+  transition: opacity 250ms ease 500ms;
+  -moz-transition: opacity 250ms ease 500ms;
+  -webkit-transition: opacity 250ms ease 500ms;
+  -o-transition: opacity 250ms ease 500ms;
+}
+
+span.jslider {
+  margin-bottom: 12px;
+}
+.slider-animate-container {
+  text-align: right;
+  margin-top: -9px;
+}
+.slider-animate-button {
+  opacity: 0.5;
+}
+.slider-animate-button .pause {
+  display: none;
+}
+.slider-animate-button.playing .pause {
+  display: inline;
+}
+.slider-animate-button .play {
+  display: inline;
+}
+.slider-animate-button.playing .play {
+  display: none;
+}

inst/www/shared/slider/css/jquery.slider.min.css

@@ -0,0 +1 @@
+.jslider .jslider-bg i,.jslider .jslider-pointer{background:url(../img/jslider.png) no-repeat 0 0}.jslider{display:block;width:100%;height:1em;position:relative;top:.6em;font-family:Arial,sans-serif}.jslider table{width:100%;border-collapse:collapse;border:0}.jslider td,.jslider th{padding:0;vertical-align:top;text-align:left;border:0}.jslider table,.jslider table tr,.jslider table tr td{width:100%;vertical-align:top}.jslider .jslider-bg{position:relative}.jslider .jslider-bg i{height:5px;position:absolute;font-size:0;top:0}.jslider .jslider-bg .l{width:50%;background-position:0 0;left:0}.jslider .jslider-bg .r{width:50%;left:50%;background-position:right 0}.jslider .jslider-bg .v{position:absolute;width:60%;left:20%;top:0;height:5px;background-position:0 -20px}.jslider .jslider-pointer{width:13px;height:15px;background-position:0 -40px;position:absolute;left:20%;top:-4px;margin-left:-6px;cursor:pointer;cursor:hand}.jslider .jslider-pointer-hover{background-position:-20px -40px}.jslider .jslider-pointer-to{left:80%}.jslider .jslider-label{font-size:9px;line-height:12px;color:black;opacity:.4;white-space:nowrap;padding:0 2px;position:absolute;top:-18px;left:0}.jslider .jslider-label-to{left:auto;right:0}.jslider .jslider-value{font-size:9px;white-space:nowrap;padding:1px 2px 0;position:absolute;top:-19px;left:20%;background:white;line-height:12px;-moz-border-radius:2px;-webkit-border-radius:2px;-o-border-radius:2px;border-radius:2px}.jslider .jslider-value-to{left:80%}.jslider .jslider-label small,.jslider .jslider-value small{position:relative;top:-0.4em}.jslider .jslider-scale{position:relative;top:9px}.jslider .jslider-scale span{position:absolute;height:5px;border-left:1px solid #999;font-size:0}.jslider .jslider-scale ins{font-size:9px;text-decoration:none;position:absolute;left:0;top:5px;color:#999}.jslider-single .jslider-pointer-to,.jslider-single .jslider-value-to,.jslider-single .jslider-bg .v,.jslider-limitless .jslider-label{display:none}.jslider_blue .jslider-bg i,.jslider_blue .jslider-pointer{background-image:url(../img/jslider.blue.png)}.jslider_plastic .jslider-bg i,.jslider_plastic .jslider-pointer{background-image:url(../img/jslider.plastic.png)}.jslider_round .jslider-bg i,.jslider_round .jslider-pointer{background-image:url(../img/jslider.round.png)}.jslider_round .jslider-pointer{width:17px;height:17px;top:-6px;margin-left:-8px}.jslider_round_plastic .jslider-bg i,.jslider_round_plastic .jslider-pointer{background-image:url(../img/jslider.round.plastic.png)}.jslider_round_plastic .jslider-pointer{width:18px;height:18px;top:-7px;margin-left:-8px}

lib/react.rb

@@ -1,172 +0,0 @@
-module React
-
-  class Context
-
-    private
-
-      @@next_id = 0
-      @@current_context = nil
-      @@pending_invalidate = []
-
-    public
-
-      def self.current!
-        return current || raise("No current context")
-      end
-
-      def self.current
-        @@current_context
-      end
-
-      attr_reader :id
-
-      def initialize
-        # The ID can used to identify/sort/dedupe contexts
-        @id = @@next_id += 1
-
-        # Indicates whether this context is invalidated, i.e. its
-        # callbacks have been called or are about to be called
-        @invalidated = false
-
-        # List of callbacks to be called after invalidation
-        @callbacks = []
-      end
-
-      # Run a block with this context as the current context. The
-      # original current context will be restored after the block
-      # is executed.
-      def run
-        old_ctx = @@current_context
-        @@current_context = self
-        begin
-          return yield
-        ensure
-          @@current_context = old_ctx
-        end
-      end
-
-      def invalidate
-        return if @invalidated
-
-        @invalidated = true
-        @@pending_invalidate << self
-      end
-
-      # Register a callback to be called after this context is
-      # invalidated (or immediately if it's already invalidated).
-      # The callback takes one argument, the context.
-      def on_invalidate(&callback)
-        if @invalidated
-          callback.call(self)
-        else
-          @callbacks << callback
-        end
-      end
-
-      def execute_callbacks
-        @callbacks.each {|callback| callback.call(self)}
-      end
-
-      # Execute all callbacks on invalidated contexts. Will do this
-      # repeatedly if the callbacks themselves cause more invalidations.
-      def self.flush
-        while !@@pending_invalidate.empty?
-          contexts = @@pending_invalidate
-          @@pending_invalidate = []
-
-          contexts.each {|context| context.execute_callbacks}
-        end
-      end
-  end
-
-  class Session
-    def initialize
-      # Key is variable name, value is variable value
-      @values = Hash.new
-      # Key is variable name, value is { Context IDs => Contexts }
-      @dependencies = Hash.new
-    end
-
-    def get(name)
-      cur_ctx = React::Context.current!
-      @dependencies[name] = @dependencies[name] || Hash.new
-      if !@dependencies[name].has_key?(cur_ctx.id)
-        @dependencies[name][cur_ctx.id] = cur_ctx
-        cur_ctx.on_invalidate do
-          @dependencies[name].delete(cur_ctx.id)
-        end
-      end
-
-      return @values[name]
-    end
-
-    def set(name, value)
-      if @values.has_key?(name) && @values[name] == value
-        return
-      end
-
-      @values[name] = value
-      if @dependencies[name]
-        @dependencies[name].each_value {|ctx| ctx.invalidate}
-      end
-    end
-  end
-
-  # Stores (and caches) a single dependent value in a context
-  class ObservableValue
-    def initialize(&valueProc)
-      @valueProc = valueProc
-      
-      @dependencies = Hash.new
-      @initialized = false
-    end
-
-    def value
-      if !@initialized
-        @initialized = true
-        update_value
-      end
-
-      cur_ctx = React::Context.current!
-      @dependencies[cur_ctx.id] = cur_ctx
-      cur_ctx.on_invalidate do
-        @dependencies.delete cur_ctx.id
-      end
-      @value
-    end
-
-    private
-      def update_value
-        old_value = @value
-  
-        ctx = Context.new
-        ctx.on_invalidate do
-          update_value
-        end
-        ctx.run do
-          @value = @valueProc.call
-        end
-
-        if old_value != @value
-          @dependencies.each_value {|dep_ctx| dep_ctx.invalidate}
-        end
-      end
-  end
-
-  # Runs the given proc whenever its dependencies change
-  class Observer
-    def initialize(&proc)
-      @proc = proc
-      run
-    end
-
-    def run
-      ctx = React::Context.new
-      ctx.on_invalidate do
-        run
-      end
-      ctx.run &@proc
-    end
-  end
-
-end

lib/shiny.rb

@@ -1,156 +0,0 @@
-require 'eventmachine'
-require 'evma_httpserver'
-require 'em-websocket'
-require 'pathname'
-require 'json'
-require 'react'
-
-
-class WebServer < EM::Connection
-  include EM::HttpServer
-
-  def post_init
-    super
-    no_environment_strings
-
-    @basepath = File.join(Dir.pwd, 'www')
-  end
-
-  def resolve_path(path)
-    # It's not a valid path if it doesn't start with /
-    return nil if path !~ /^\//
-
-    abspath = File.join(@basepath, "./#{path}")
-    # Resolves '..', etc.
-    abspath = Pathname.new(abspath).cleanpath.to_s
-
-    return false if abspath[0...(@basepath.size + 1)] != @basepath + '/'
-    return false if !File.exist?(abspath)
-
-    return abspath
-  end
-
-  def process_http_request
-    # the http request details are available via the following instance variables:
-    #   @http_protocol
-    #   @http_request_method
-    #   @http_cookie
-    #   @http_if_none_match
-    #   @http_content_type
-    #   @http_path_info
-    #   @http_request_uri
-    #   @http_query_string
-    #   @http_post_content
-    #   @http_headers
-
-    response = EM::DelegatedHttpResponse.new(self)
-
-    path = @http_path_info
-    path = '/index.html' if path == '/'
-
-    resolved_path = resolve_path(path)
-
-    if !resolved_path
-      response.status = 404
-      response.content_type 'text/html'
-      response.content = '<h1>404 Not Found</h1>'
-    else
-      response.status = 200
-      response.content_type case resolved_path
-      when /\.html?$/
-        'text/html'
-      when /\.js$/
-        'text/javascript'
-      when /\.css$/
-        'text/css'
-      when /\.png$/
-        'image/png'
-      when /\.jpg$/
-        'image/jpeg'
-      when /\.gif$/
-        'image/gif'
-      end
-      response.content = File.read(resolved_path)
-    end
-    response.send_response
-  end
-end
-
-def run_shiny_app(shinyapp)
-  EventMachine.run do
-    EventMachine.start_server '0.0.0.0', 8100, WebServer
-    puts "Listening on port 8100"
-    
-    EventMachine::WebSocket.start(:host => '0.0.0.0', :port => 8101) do |ws|
-      shinyapp.websocket = ws
-      ws.onclose { exit(0) }
-      ws.onmessage do |msg|
-        begin
-          puts "RECV: #{msg}"
-
-          msg_obj = JSON.parse(msg)
-          case msg_obj['method']
-          when 'init'
-            msg_obj['data'].each do |k, v|
-              shinyapp.session.set(k, v)
-            end
-            React::Context.flush
-            shinyapp.instantiate_outputs
-          when 'update'
-            msg_obj['data'].each do |k, v|
-              shinyapp.session.set(k, v)
-            end
-          end
-
-          React::Context.flush
-          shinyapp.flush_output
-        rescue Exception => e
-          puts "ERROR: #{e}"
-          puts e.backtrace.collect {|x| "\t#{x}"}
-          raise
-        end
-      end
-    end
-  end
-end
-
-class ShinyApp
-  attr_reader :session
-
-  def initialize
-    @session = React::Session.new
-    @outputs = {}
-    @invalidated_output_values = Hash.new
-  end
-
-  def websocket=(value)
-    @websocket = value
-  end
-
-  def define_output(name, &proc)
-    @outputs[name] = proc
-  end
-
-  def instantiate_outputs
-    @outputs.keys.each do |name|
-      proc = @outputs.delete(name)
-      React::Observer.new do
-        value = proc.call
-        @invalidated_output_values[name] = value
-      end
-    end
-  end
-
-  def flush_output
-    return if @invalidated_output_values.empty?
-
-    data = @invalidated_output_values
-    @invalidated_output_values = Hash.new
-    puts "SEND: #{JSON.generate(data)}"
-    @websocket.send(JSON.generate(data))
-  end
-
-  def run
-    run_shiny_app self
-  end
-end

man/HTML.Rd

@@ -0,0 +1,24 @@
+\name{HTML}
+\alias{HTML}
+\title{Mark Characters as HTML}
+\usage{
+  HTML(text, ...)
+}
+\arguments{
+  \item{text}{The text value to mark with HTML}
+
+  \item{...}{Any additional values to be converted to
+  character and concatenated together}
+}
+\value{
+  The same value, but marked as HTML.
+}
+\description{
+  Marks the given text as HTML, which means the \link{tag}
+  functions will know not to perform HTML escaping on it.
+}
+\examples{
+el <- div(HTML("I like <u>turtles</u>"))
+cat(as.character(el))
+}
+

man/addResourcePath.Rd

@@ -0,0 +1,36 @@
+\name{addResourcePath}
+\alias{addResourcePath}
+\title{Resource Publishing}
+\usage{
+  addResourcePath(prefix, directoryPath)
+}
+\arguments{
+  \item{prefix}{The URL prefix (without slashes). Valid
+  characters are a-z, A-Z, 0-9, hyphen, and underscore; and
+  must begin with a-z or A-Z. For example, a value of 'foo'
+  means that any request paths that begin with '/foo' will
+  be mapped to the given directory.}
+
+  \item{directoryPath}{The directory that contains the
+  static resources to be served.}
+}
+\description{
+  Adds a directory of static resources to Shiny's web
+  server, with the given path prefix. Primarily intended
+  for package authors to make supporting JavaScript/CSS
+  files available to their components.
+}
+\details{
+  You can call \code{addResourcePath} multiple times for a
+  given \code{prefix}; only the most recent value will be
+  retained. If the normalized \code{directoryPath} is
+  different than the directory that's currently mapped to
+  the \code{prefix}, a warning will be issued.
+}
+\examples{
+addResourcePath('datasets', system.file('data', package='datasets'))
+}
+\seealso{
+  \code{\link{singleton}}
+}
+

man/animationOptions.Rd

@@ -0,0 +1,28 @@
+\name{animationOptions}
+\alias{animationOptions}
+\title{Animation Options}
+\usage{
+  animationOptions(interval = 1000, loop = FALSE,
+    playButton = NULL, pauseButton = NULL)
+}
+\arguments{
+  \item{interval}{The interval, in milliseconds, between
+  each animation step.}
+
+  \item{loop}{\code{TRUE} to automatically restart the
+  animation when it reaches the end.}
+
+  \item{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}}).}
+
+  \item{pauseButton}{Similar to \code{playButton}, but for
+  the pause button.}
+}
+\description{
+  Creates an options object for customizing animations for
+  \link{sliderInput}.
+}
+

man/bootstrapPage.Rd

@@ -0,0 +1,26 @@
+\name{bootstrapPage}
+\alias{bootstrapPage}
+\title{Create a Twitter Bootstrap page}
+\usage{
+  bootstrapPage(...)
+}
+\arguments{
+  \item{...}{The contents of the document body.}
+}
+\value{
+  A UI defintion that can be passed to the \link{shinyUI}
+  function.
+}
+\description{
+  Create a Shiny UI page that loads the CSS and JavaScript
+  for \href{http://getbootstrap.com}{Twitter Bootstrap},
+  and has no content in the page body (other than what you
+  provide).
+}
+\details{
+  This function is primarily intended for users who are
+  proficient in HTML/CSS, and know how to lay out pages in
+  Bootstrap. Most users should use template functions like
+  \code{\link{pageWithSidebar}}.
+}
+

man/builder.Rd

@@ -0,0 +1,79 @@
+\name{builder}
+\alias{p}
+\alias{h1}
+\alias{h2}
+\alias{h3}
+\alias{h4}
+\alias{h5}
+\alias{h6}
+\alias{a}
+\alias{br}
+\alias{div}
+\alias{span}
+\alias{pre}
+\alias{code}
+\alias{img}
+\alias{strong}
+\alias{em}
+\alias{tags}
+
+\usage{
+  p(...)
+  h1(...)
+  h2(...)
+  h3(...)
+  h4(...)
+  h5(...)
+  h6(...)
+  a(...)
+  br(...)
+  div(...)
+  span(...)
+  pre(...)
+  code(...)
+  img(...)
+  strong(...)
+  em(...)
+  
+  tags
+}
+
+\title{HTML Builder Functions}
+
+\arguments{
+  \item{...}{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.}
+}
+\description{
+  Simple functions for constructing HTML documents.
+}
+\details{
+  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 \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{as.character}.
+}
+\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))
+}

man/checkboxGroupInput.Rd

@@ -0,0 +1,39 @@
+\name{checkboxGroupInput}
+\alias{checkboxGroupInput}
+\title{Checkbox Group Input Control}
+\usage{
+  checkboxGroupInput(inputId, label, choices,
+    selected = NULL)
+}
+\arguments{
+  \item{inputId}{Input variable to assign the control's
+  value to.}
+
+  \item{label}{Display label for the control.}
+
+  \item{choices}{List of values to show checkboxes for. If
+  elements of the list are named then that name rather than
+  the value is displayed to the user.}
+
+  \item{selected}{Names of items that should be initially
+  selected, if any.}
+}
+\value{
+  A list of HTML elements that can be added to a UI
+  definition.
+}
+\description{
+  Create a group of checkboxes that can be used to toggle
+  multiple choices independently. The server will receive
+  the input as a character vector of the selected values.
+}
+\examples{
+checkboxGroupInput("variable", "Variable:",
+                   list("Cylinders" = "cyl",
+                        "Transmission" = "am",
+                        "Gears" = "gear"))
+}
+\seealso{
+  \code{\link{checkboxInput}}
+}
+

man/checkboxInput.Rd

@@ -0,0 +1,29 @@
+\name{checkboxInput}
+\alias{checkboxInput}
+\title{Checkbox Input Control}
+\usage{
+  checkboxInput(inputId, label, value = FALSE)
+}
+\arguments{
+  \item{inputId}{Input variable to assign the control's
+  value to.}
+
+  \item{label}{Display label for the control.}
+
+  \item{value}{Initial value (\code{TRUE} or
+  \code{FALSE}).}
+}
+\value{
+  A checkbox control that can be added to a UI definition.
+}
+\description{
+  Create a checkbox that can be used to specify logical
+  values.
+}
+\examples{
+checkboxInput("outliers", "Show outliers", FALSE)
+}
+\seealso{
+  \code{\link{checkboxGroupInput}}
+}
+

man/conditionalPanel.Rd

@@ -0,0 +1,54 @@
+\name{conditionalPanel}
+\alias{conditionalPanel}
+\title{Conditional Panel}
+\usage{
+  conditionalPanel(condition, ...)
+}
+\arguments{
+  \item{condition}{A JavaScript expression that will be
+  evaluated repeatedly to determine whether the panel
+  should be displayed.}
+
+  \item{...}{Elements to include in the panel.}
+}
+\description{
+  Creates a panel that is visible or not, depending on the
+  value of a JavaScript expression. The JS expression is
+  evaluated once at startup and whenever Shiny detects a
+  relevant change in input/output.
+}
+\details{
+  In the JS expression, you can refer to \code{input} and
+  \code{output} JavaScript objects that contain the current
+  values of input and output. For example, if you have an
+  input with an id of \code{foo}, then you can use
+  \code{input.foo} to read its value. (Be sure not to
+  modify the input/output objects, as this may cause
+  unpredictable behavior.)
+}
+\examples{
+sidebarPanel(
+   selectInput(
+      "plotType", "Plot Type",
+      list(Scatter = "scatter",
+           Histogram = "hist")),
+
+   # Only show this panel if the plot type is a histogram
+   conditionalPanel(
+      condition = "input.plotType == 'hist'",
+      selectInput(
+         "breaks", "Breaks",
+         list("Sturges",
+              "Scott",
+              "Freedman-Diaconis",
+              "[Custom]" = "custom")),
+
+      # Only show this panel if Custom is selected
+      conditionalPanel(
+         condition = "input.breaks == 'custom'",
+         sliderInput("breakCount", "Break Count", min=1, max=1000, value=10)
+      )
+   )
+)
+}
+

man/fileInput.Rd

@@ -0,0 +1,27 @@
+\name{fileInput}
+\alias{fileInput}
+\title{File Upload Control}
+\usage{
+  fileInput(inputId, label, multiple = FALSE,
+    accept = NULL)
+}
+\arguments{
+  \item{inputId}{Input variable to assign the control's
+  value to.}
+
+  \item{label}{Display label for the control.}
+
+  \item{multiple}{Whether the user should be allowed to
+  select and upload multiple files at once.}
+
+  \item{accept}{A character vector of MIME types; gives the
+  browser a hint of what kind of files the server is
+  expecting.}
+}
+\description{
+  Create a file upload control that can be used to upload
+  one or more files. \bold{Experimental feature. Only works
+  in some browsers (primarily tested on Chrome and
+  Firefox).}
+}
+

man/headerPanel.Rd

@@ -0,0 +1,20 @@
+\name{headerPanel}
+\alias{headerPanel}
+\title{Create a header panel}
+\usage{
+  headerPanel(title)
+}
+\arguments{
+  \item{title}{An application title to display}
+}
+\value{
+  A headerPanel that can be passed to
+  \link{pageWithSidebar}
+}
+\description{
+  Create a header panel containing an application title.
+}
+\examples{
+headerPanel("Hello Shiny!")
+}
+

man/helpText.Rd

@@ -0,0 +1,24 @@
+\name{helpText}
+\alias{helpText}
+\title{Create a help text element}
+\usage{
+  helpText(text, ...)
+}
+\arguments{
+  \item{text}{Help text string}
+
+  \item{...}{Additional help text strings}
+}
+\value{
+  A help text element that can be added to a UI definition.
+}
+\description{
+  Create help text which can be added to an input form to
+  provide additional explanation or context.
+}
+\examples{
+helpText("Note: while the data view will show only",
+         "the specified number of observations, the",
+         "summary will be based on the full dataset.")
+}
+

man/htmlOutput.Rd

@@ -0,0 +1,30 @@
+\name{htmlOutput}
+\alias{htmlOutput}
+\alias{uiOutput}
+\title{Create an HTML output element}
+\usage{
+  htmlOutput(outputId)
+
+  uiOutput(outputId)
+}
+\arguments{
+  \item{outputId}{output variable to read the value from}
+}
+\value{
+  An HTML output element that can be included in a panel
+}
+\description{
+  Render a reactive output variable as HTML within an
+  application page. The text will be included within an
+  HTML \code{div} tag, and is presumed to contain HTML
+  content which should not be escaped.
+}
+\details{
+  \code{uiOutput} is intended to be used with
+  \code{reactiveUI} on the server side. It is currently
+  just an alias for \code{htmlOutput}.
+}
+\examples{
+htmlOutput("summary")
+}
+

man/invalidateLater.Rd

@@ -0,0 +1,15 @@
+\name{invalidateLater}
+\alias{invalidateLater}
+\title{Scheduled Invalidation}
+\usage{
+  invalidateLater(millis)
+}
+\arguments{
+  \item{millis}{Approximate milliseconds to wait before
+  invalidating the current reactive context.}
+}
+\description{
+  Schedules the current reactive context to be invalidated
+  in the given number of milliseconds.
+}
+

man/mainPanel.Rd

@@ -0,0 +1,24 @@
+\name{mainPanel}
+\alias{mainPanel}
+\title{Create a main panel}
+\usage{
+  mainPanel(...)
+}
+\arguments{
+  \item{...}{Ouput elements to include in the main panel}
+}
+\value{
+  A main panel that can be passed to \link{pageWithSidebar}
+}
+\description{
+  Create a main panel containing output elements that can
+  in turn be passed to \link{pageWithSidebar}.
+}
+\examples{
+# Show the caption and plot of the requested variable against mpg
+mainPanel(
+   h3(textOutput("caption")),
+   plotOutput("mpgPlot")
+)
+}
+

man/numericInput.Rd

@@ -0,0 +1,34 @@
+\name{numericInput}
+\alias{numericInput}
+\title{Create a numeric input control}
+\usage{
+  numericInput(inputId, label, value, min = NA, max = NA,
+    step = NA)
+}
+\arguments{
+  \item{inputId}{Input variable to assign the control's
+  value to}
+
+  \item{label}{Display label for the control}
+
+  \item{value}{Initial value}
+
+  \item{min}{Minimum allowed value}
+
+  \item{max}{Maximum allowed value}
+
+  \item{step}{Interval to use when stepping between min and
+  max}
+}
+\value{
+  A numeric input control that can be added to a UI
+  definition.
+}
+\description{
+  Create an input control for entry of numeric values
+}
+\examples{
+numericInput("obs", "Observations:", 10,
+             min = 1, max = 100)
+}
+

man/pageWithSidebar.Rd

@@ -0,0 +1,47 @@
+\name{pageWithSidebar}
+\alias{pageWithSidebar}
+\title{Create a page with a sidebar}
+\usage{
+  pageWithSidebar(headerPanel, sidebarPanel, mainPanel)
+}
+\arguments{
+  \item{headerPanel}{The \link{headerPanel} with the
+  application title}
+
+  \item{sidebarPanel}{The \link{sidebarPanel} containing
+  input controls}
+
+  \item{mainPanel}{The \link{mainPanel} containing outputs}
+}
+\value{
+  A UI defintion that can be passed to the \link{shinyUI}
+  function
+}
+\description{
+  Create a Shiny UI that contains a header with the
+  application title, a sidebar for input controls, and a
+  main area for output.
+}
+\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,
+                value = 500)
+  ),
+
+  # Show a plot of the generated distribution
+  mainPanel(
+    plotOutput("distPlot")
+  )
+))
+}
+

man/plotOutput.Rd

@@ -0,0 +1,26 @@
+\name{plotOutput}
+\alias{plotOutput}
+\title{Create a plot output element}
+\usage{
+  plotOutput(outputId, width = "100\%", height = "400px")
+}
+\arguments{
+  \item{outputId}{output variable to read the plot from}
+
+  \item{width}{Plot width}
+
+  \item{height}{Plot height}
+}
+\value{
+  A plot output element that can be included in a panel
+}
+\description{
+  Render a \link{reactivePlot} within an application page.
+}
+\examples{
+# Show a plot of the generated distribution
+mainPanel(
+  plotOutput("distPlot")
+)
+}
+

man/radioButtons.Rd

@@ -0,0 +1,35 @@
+\name{radioButtons}
+\alias{radioButtons}
+\title{Create radio buttons}
+\usage{
+  radioButtons(inputId, label, choices, selected = NULL)
+}
+\arguments{
+  \item{inputId}{Input variable to assign the control's
+  value to}
+
+  \item{label}{Display label for the control}
+
+  \item{choices}{List of values to select from (if elements
+  of the list are named then that name rather than the
+  value is displayed to the user)}
+
+  \item{selected}{Name of initially selected item (if not
+  specified then defaults to the first item)}
+}
+\value{
+  A set of radio buttons that can be added to a UI
+  definition.
+}
+\description{
+  Create a set of radio buttons used to select an item from
+  a list.
+}
+\examples{
+radioButtons("dist", "Distribution type:",
+             list("Normal" = "norm",
+                  "Uniform" = "unif",
+                  "Log-normal" = "lnorm",
+                  "Exponential" = "exp"))
+}
+

man/reactive.Rd

@@ -0,0 +1,35 @@
+\name{reactive}
+\alias{reactive}
+\title{Create a Reactive Function}
+\usage{
+  reactive(x)
+}
+\arguments{
+  \item{x}{The value or function to make reactive. The
+  function must not have any parameters.}
+}
+\value{
+  A reactive function. (Note that reactive functions can
+  only be called from within other reactive functions.)
+}
+\description{
+  Wraps a normal function to create a reactive function.
+  Conceptually, a reactive function is a function whose
+  result will change over time.
+}
+\details{
+  Reactive functions are functions that can read reactive
+  values and call other reactive functions. Whenever a
+  reactive value changes, any reactive functions that
+  depended on it are marked as "invalidated" and will
+  automatically re-execute if necessary. If a reactive
+  function is marked as invalidated, any other reactive
+  functions that recently called it are also marked as
+  invalidated. In this way, invalidations ripple through
+  the functions that depend on each other.
+
+  See the
+  \href{http://rstudio.github.com/shiny/tutorial/}{Shiny
+  tutorial} for more information about reactive functions.
+}
+

man/reactivePlot.Rd

@@ -0,0 +1,31 @@
+\name{reactivePlot}
+\alias{reactivePlot}
+\title{Plot Output}
+\usage{
+  reactivePlot(func, width = "auto", height = "auto", ...)
+}
+\arguments{
+  \item{func}{A function that generates a plot.}
+
+  \item{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.}
+
+  \item{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.}
+
+  \item{...}{Arguments to be passed through to
+  \code{\link[grDevices]{png}}.  These can be used to set
+  the width, height, background color, etc.}
+}
+\description{
+  Creates a reactive plot that is suitable for assigning to
+  an \code{output} slot.
+}
+\details{
+  The corresponding HTML output tag should be \code{div} or
+  \code{img} and have the CSS class name
+  \code{shiny-plot-output}.
+}
+

man/reactivePrint.Rd

@@ -0,0 +1,26 @@
+\name{reactivePrint}
+\alias{reactivePrint}
+\title{Printable Output}
+\usage{
+  reactivePrint(func)
+}
+\arguments{
+  \item{func}{A function that returns a printable R
+  object.}
+}
+\description{
+  Makes a reactive version of the given function that also
+  turns its printable result into a string. The reactive
+  function is suitable for assigning to an \code{output}
+  slot.
+}
+\details{
+  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 \code{\link[utils]{capture.output}} call.
+}
+

man/reactiveTable.Rd

@@ -0,0 +1,22 @@
+\name{reactiveTable}
+\alias{reactiveTable}
+\title{Table Output}
+\usage{
+  reactiveTable(func, ...)
+}
+\arguments{
+  \item{func}{A function that returns an R object that can
+  be used with \code{\link[xtable]{xtable}}.}
+
+  \item{...}{Arguments to be passed through to
+  \code{\link[xtable]{xtable}}.}
+}
+\description{
+  Creates a reactive table that is suitable for assigning
+  to an \code{output} slot.
+}
+\details{
+  The corresponding HTML output tag should be \code{div}
+  and have the CSS class name \code{shiny-html-output}.
+}
+

man/reactiveText.Rd

@@ -0,0 +1,26 @@
+\name{reactiveText}
+\alias{reactiveText}
+\title{Text Output}
+\usage{
+  reactiveText(func)
+}
+\arguments{
+  \item{func}{A function that returns an R object that can
+  be used as an argument to \code{cat}.}
+}
+\description{
+  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.
+}
+\details{
+  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 \code{\link[utils]{capture.output}}
+  call.
+}
+

man/reactiveTimer.Rd

@@ -0,0 +1,35 @@
+\name{reactiveTimer}
+\alias{reactiveTimer}
+\title{Timer}
+\usage{
+  reactiveTimer(intervalMs = 1000)
+}
+\arguments{
+  \item{intervalMs}{How often to fire, in milliseconds}
+}
+\value{
+  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}}).
+}
+\description{
+  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.
+}
+\details{
+  \link[=reactive]{Reactive functions} 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.
+}
+\seealso{
+  invalidateLater
+}
+

man/reactiveUI.Rd

@@ -0,0 +1,33 @@
+\name{reactiveUI}
+\alias{reactiveUI}
+\title{UI Output}
+\usage{
+  reactiveUI(func)
+}
+\arguments{
+  \item{func}{A function that returns a Shiny tag object,
+  \code{\link{HTML}}, or a list of such objects.}
+}
+\description{
+  \bold{Experimental feature.} Makes a reactive version of
+  a function that generates HTML using the Shiny UI
+  library.
+}
+\details{
+  The corresponding HTML output tag should be \code{div}
+  and have the CSS class name \code{shiny-html-output} (or
+  use \code{\link{uiOutput}}).
+}
+\examples{
+\dontrun{
+  output$moreControls <- reactiveUI(function() {
+    list(
+
+    )
+  })
+}
+}
+\seealso{
+  conditionalPanel
+}
+

man/repeatable.Rd

@@ -0,0 +1,38 @@
+\name{repeatable}
+\alias{repeatable}
+\title{Make a random number generator repeatable}
+\usage{
+  repeatable(rngfunc,
+    seed = runif(1, 0, .Machine$integer.max))
+}
+\arguments{
+  \item{rngfunc}{The function that is affected by the R
+  session's seed.}
+
+  \item{seed}{The seed to set every time the resulting
+  function is called.}
+}
+\value{
+  A repeatable version of the function that was passed in.
+}
+\description{
+  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.
+}
+\note{
+  When called, the returned function attempts to preserve
+  the R session's current seed by snapshotting and
+  restoring \code{\link[base]{.Random.seed}}.
+}
+\examples{
+rnormA <- repeatable(rnorm)
+rnormB <- repeatable(rnorm)
+rnormA(3)  # [1]  1.8285879 -0.7468041 -0.4639111
+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
+}
+

man/runApp.Rd

@@ -0,0 +1,26 @@
+\name{runApp}
+\alias{runApp}
+\title{Run Shiny Application}
+\usage{
+  runApp(appDir = getwd(), port = 8100L,
+    launch.browser = getOption("shiny.launch.browser", interactive()))
+}
+\arguments{
+  \item{appDir}{The directory of the application. Should
+  contain \code{server.R}, plus, either \code{ui.R} or a
+  \code{www} directory that contains the file
+  \code{index.html}. Defaults to the working directory.}
+
+  \item{port}{The TCP port that the application should
+  listen on. Defaults to port 8100.}
+
+  \item{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.}
+}
+\description{
+  Runs a Shiny application. This function normally does not
+  return; interrupt R to stop the application (usually by
+  pressing Ctrl+C or Esc).
+}
+

man/runExample.Rd

@@ -0,0 +1,23 @@
+\name{runExample}
+\alias{runExample}
+\title{Run Shiny Example Applications}
+\usage{
+  runExample(example = NA, port = 8100L,
+    launch.browser = getOption("shiny.launch.browser", interactive()))
+}
+\arguments{
+  \item{example}{The name of the example to run, or
+  \code{NA} (the default) to list the available examples.}
+
+  \item{port}{The TCP port that the application should
+  listen on. Defaults to port 8100.}
+
+  \item{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.}
+}
+\description{
+  Launch Shiny example applications, and optionally, your
+  system's web browser.
+}
+

man/runGist.Rd

@@ -0,0 +1,26 @@
+\name{runGist}
+\alias{runGist}
+\title{Run a Shiny application from https://gist.github.com}
+\usage{
+  runGist(gist, port = 8100L,
+    launch.browser = getOption("shiny.launch.browser", interactive()))
+}
+\arguments{
+  \item{gist}{The identifier of the gist. For example, if
+  the gist is https://gist.github.com/3239667, then
+  \code{3239667}, \code{'3239667'}, and
+  \code{'https://gist.github.com/3239667'} are all valid
+  values.}
+
+  \item{port}{The TCP port that the application should
+  listen on. Defaults to port 8100.}
+
+  \item{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.}
+}
+\description{
+  Download and launch a Shiny application that is hosted on
+  GitHub as a gist.
+}
+

man/selectInput.Rd

@@ -0,0 +1,40 @@
+\name{selectInput}
+\alias{selectInput}
+\title{Create a select list input control}
+\usage{
+  selectInput(inputId, label, choices, selected = NULL,
+    multiple = FALSE)
+}
+\arguments{
+  \item{inputId}{Input variable to assign the control's
+  value to}
+
+  \item{label}{Display label for the control}
+
+  \item{choices}{List of values to select from. If elements
+  of the list are named then that name rather than the
+  value is displayed to the user.}
+
+  \item{selected}{Name of initially selected item (or
+  multiple names if \code{multiple = TRUE}). If not
+  specified then defaults to the first item for
+  single-select lists and no items for multiple select
+  lists.}
+
+  \item{multiple}{Is selection of multiple items allowed?}
+}
+\value{
+  A select list control that can be added to a UI
+  definition.
+}
+\description{
+  Create a select list that can be used to choose a single
+  or multiple items from a list of values.
+}
+\examples{
+selectInput("variable", "Variable:",
+            list("Cylinders" = "cyl",
+                 "Transmission" = "am",
+                 "Gears" = "gear"))
+}
+

man/shiny-package.Rd

@@ -0,0 +1,41 @@
+\name{shiny-package}
+\alias{shiny-package}
+\alias{shiny}
+\docType{package}
+\title{
+Web Application Framework for R
+}
+\description{
+Shiny makes it incredibly easy to build interactive web 
+    applications with R. Automatic "reactive" binding between inputs and 
+    outputs and extensive pre-built widgets make it possible to build 
+    beautiful, responsive, and powerful applications with minimal effort.
+    
+    The Shiny tutorial at \url{http://rstudio.github.com/shiny/tutorial}
+    explains the framework in-depth, walks you through
+    building a simple application, and includes extensive annotated 
+    examples.
+}
+\details{
+\tabular{ll}{
+Package: \tab shiny\cr
+Type: \tab Package\cr
+Version: \tab 0.1.0\cr
+Date: \tab 2012-07-28\cr
+License: \tab GPL-3\cr
+Depends: \tab R (>= 2.14.1), methods, websockets (>= 1.1.4), caTools, RJSONIO, xtable\cr
+Imports: \tab stats, tools, utils, datasets\cr
+URL: \tab https://github.com/rstudio/shiny, http://rstudio.github.com/shiny/tutorial\cr
+BugReports: \tab https://github.com/rstudio/shiny/issues\cr
+}
+
+}
+\author{
+RStudio, Inc.
+
+Maintainer: Joe Cheng <joe@rstudio.org>
+}
+
+
+\keyword{ package }
+

man/shinyServer.Rd

@@ -0,0 +1,41 @@
+\name{shinyServer}
+\alias{shinyServer}
+\title{Define Server Functionality}
+\usage{
+  shinyServer(func)
+}
+\arguments{
+  \item{func}{The server function for this application. See
+  the details section for more information.}
+}
+\description{
+  Defines the server-side logic of the Shiny application.
+  This generally involves creating functions that map user
+  inputs to various kinds of output.
+}
+\details{
+  Call \code{shinyServer} from your application's
+  \code{server.R} file, passing in a "server function" that
+  provides the server-side logic of your application.
+
+  The server function will be called when each client (web
+  browser) first loads the Shiny application's page. It
+  must take an \code{input} and an \code{output} parameter.
+  Any return value will be ignored.
+
+  See the
+  \href{http://rstudio.github.com/shiny/tutorial/}{tutorial}
+  for more on how to write a server function.
+}
+\examples{
+\dontrun{
+# A very simple Shiny app that takes a message from the user
+# and outputs an uppercase version of it.
+shinyServer(function(input, output) {
+  output$uppercase <- reactiveText(function() {
+    toupper(input$message)
+  })
+})
+}
+}
+

man/shinyUI.Rd

@@ -0,0 +1,24 @@
+\name{shinyUI}
+\alias{shinyUI}
+\title{Create a Shiny UI handler}
+\usage{
+  shinyUI(ui, path = "/")
+}
+\arguments{
+  \item{ui}{A user-interace definition}
+
+  \item{path}{The web server path to server the UI from}
+}
+\value{
+  Called for its side-effect of registering a UI handler
+}
+\description{
+  Register a UI handler by providing a UI definition
+  (created with e.g. \link{pageWithSidebar}) and web server
+  path (typically "/", the default value).
+}
+\examples{
+el <- div(HTML("I like <u>turtles</u>"))
+cat(as.character(el))
+}
+

man/sidebarPanel.Rd

@@ -0,0 +1,27 @@
+\name{sidebarPanel}
+\alias{sidebarPanel}
+\title{Create a sidebar panel}
+\usage{
+  sidebarPanel(...)
+}
+\arguments{
+  \item{...}{UI elements to include on the sidebar}
+}
+\value{
+  A sidebar that can be passed to \link{pageWithSidebar}
+}
+\description{
+  Create a sidebar panel containing input controls that can
+  in turn be passed to \link{pageWithSidebar}.
+}
+\examples{
+# 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")),
+
+  numericInput("obs", "Observations:", 10)
+)
+}
+

man/singleton.Rd

@@ -0,0 +1,20 @@
+\name{singleton}
+\alias{singleton}
+\title{Include Content Only Once}
+\usage{
+  singleton(x)
+}
+\arguments{
+  \item{x}{A \code{\link{tag}}, text, \code{\link{HTML}},
+  or list.}
+}
+\description{
+  Use \code{singleton} to wrap contents (tag, text, HTML,
+  or lists) that should be included in the generated
+  document only once, yet may appear in the
+  document-generating code more than once. Only the first
+  appearance of the content (in document order) will be
+  used. Useful for custom components that have JavaScript
+  files or stylesheets.
+}
+