Show MessageWindow from the background page

remoting/webapp/background/message_window_helper.js

Index: remoting/webapp/background/message_window_helper.js
diff --git a/remoting/webapp/background/message_window_helper.js b/remoting/webapp/background/message_window_helper.js
new file mode 100644
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+++ b/remoting/webapp/background/message_window_helper.js
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+// Copyright (c) 2013 Google. All rights reserved.
+
+'use strict';
+
+/** @suppress {duplicate} */
+var remoting = remoting || {};
+
+/**
+ * Create a new message window.
+ *
+ * @param {Object} options Message window create options
+ * @constructor
+ */
+remoting.MessageWindow = function(options) {
+  var title = /** @type {string} */ (options.title);
+  var message = /** @type {string} */ (options.message);
+  var okButtonLabel = /** @type {string} */ (options.buttonLabel);
+  var cancelButtonLabel = /** @type {string} */ (options.cancelButtonLabel);
+  var onResult = /** @type {function(number):void} */(options.onResult);
+  /** @type {number} */
+  var duration = 0;
+  if (/** @type {number?} */(options.duration)) {
+    duration = /** @type {number} */(options.duration);
+  }
+  /** @type {string} */
+  var infobox = '';
+  if (/** @type {string?} */(options.infobox)) {
+    infobox = /** @type {string} */(options.infobox);
+  }
+  var onTimeout = /** @type {?function():void} */ (options.onTimeout);
+
+  /** @type {number} */
+  this.id_ = remoting.MessageWindowManager.addMessageWindow(this);
+
+  /** @type {?function(number):void} */
+  this.onResult_ = onResult;
+
+  /** @type {Window} */
+  this.window_ = null;
+
+  /** @type {number} */
+  this.timer_ = 0;
+
+  /** @type {Array.<function():void>} */
+  this.pendingWindowOperations_ = [];
+
+  /**
+   * Callback to call when the timeout expires.
+   * @type {?function():void}
+   */
+  this.onTimeout_ = onTimeout;
+
+  var message_struct = {
+    command: 'show',
+    id: this.id_,
+    title: title,
+    message: message,
+    infobox: infobox,
+    buttonLabel: okButtonLabel,
+    cancelButtonLabel: cancelButtonLabel,
+    showSpinner: (duration != 0)
+  };
+
+  var windowAttributes = {
+    bounds: {
+      width: 400,
+      height: 100
+    },
+    resizable: false
+  };
+
+  /** @type {remoting.MessageWindow} */
+  var that = this;
+
+  /** @param {AppWindow} appWindow */
+  var onCreate = function(appWindow) {
+    that.setWindow_(/** @type {Window} */(appWindow.contentWindow));
+    var onLoad = function() {
+      appWindow.contentWindow.postMessage(message_struct, '*');
+    };
+    appWindow.contentWindow.addEventListener('load', onLoad, false);
+  };
+
+  chrome.app.window.create('message_window.html', windowAttributes, onCreate);
+
+  if (duration != 0) {
+    this.timer_ = window.setTimeout(this.onTimeoutHandler_.bind(this),
+                                    duration);
+  }
+};
+
+/**
+ * Called when the timer runs out. This in turn calls the window's
+ * timeout handler (if any).
+ */
+remoting.MessageWindow.prototype.onTimeoutHandler_ = function() {
+  this.close();
+  if (this.onTimeout_) {
+    this.onTimeout_();
+  }
+};
+
+/**
+ * Update the message being shown in the window. This should only be called
+ * after the window has been shown.
+ *
+ * @param {string} message The message.
+ */
+remoting.MessageWindow.prototype.updateMessage = function(message) {
+  if (!this.window_) {
+    this.pendingWindowOperations_.push(this.updateMessage.bind(this, message));
+    return;
+  }
+
+  var message_struct = {
+    command: 'update_message',
+    message: message
+  };
+  this.window_.postMessage(message_struct, '*');
+};
+
+/**
+ * Close the message box and unregister it with the window manager.
+ */
+remoting.MessageWindow.prototype.close = function() {
+  if (!this.window_) {
+    this.pendingWindowOperations_.push(this.close.bind(this));
+    return;
+  }
+
+  if (this.timer_) {
+    window.clearTimeout(this.timer_);
+  }
+  this.timer_ = 0;
+
+  // Unregister the window with the window manager.
+  // After this call, events sent to this window will no longer trigger the
+  // onResult callback.
+  remoting.MessageWindowManager.deleteMessageWindow(this.id_);
+  this.window_.close();
+  this.window_ = null;
+};
+
+/**
+ * Dispatch a message box result to the registered callback.
+ *
+ * @param {number} result The dialog result.
+ */
+remoting.MessageWindow.prototype.handleResult = function(result) {
+  if (this.onResult_) {
+    this.onResult_(result);
+  }
+}
+
+/**
+ * Set the window handle and run any pending operations that require it.
+ *
+ * @param {Window} window
+ * @private
+ */
+remoting.MessageWindow.prototype.setWindow_ = function(window) {
+  base.debug.assert(this.window_ == null);
+  this.window_ = window;
+  for (var i = 0; i < this.pendingWindowOperations_.length; ++i) {
+    var pendingOperation = this.pendingWindowOperations_[i];
+    pendingOperation();
+  }
+  this.pendingWindowOperations_ = [];
+};
+
+/**
+ * Static method to create and show a confirm message box.
+ *
+ * @param {string} title The title of the message box.
+ * @param {string} message The message.
+ * @param {string} okButtonLabel The text for the primary button.
+ * @param {string} cancelButtonLabel The text for the secondary button.
+ * @param {function(number):void} onResult The callback to invoke when the
+ *     user closes the message window.
+ * @return {remoting.MessageWindow}
+ */
+remoting.MessageWindow.showConfirmWindow = function(
+    title, message, okButtonLabel, cancelButtonLabel, onResult) {
+  var options = {
+    title: title,
+    message: message,
+    buttonLabel: okButtonLabel,
+    cancelButtonLabel: cancelButtonLabel,
+    onResult: onResult
+  };
+  return new remoting.MessageWindow(options);
+};
+
+/**
+ * Static method to create and show a simple message box.
+ *
+ * @param {string} title The title of the message box.
+ * @param {string} message The message.
+ * @param {string} buttonLabel The text for the primary button.
+ * @param {function(number):void} onResult The callback to invoke when the
+ *     user closes the message window.
+ * @return {remoting.MessageWindow}
+ */
+remoting.MessageWindow.showMessageWindow = function(
+    title, message, buttonLabel, onResult) {
+  var options = {
+    title: title,
+    message: message,
+    buttonLabel: buttonLabel,
+    onResult: onResult
+  };
+  return new remoting.MessageWindow(options);
+};
+
+/**
+ * Static method to create and show an error message box with an "OK" button.
+ * The app will close when the user dismisses the message window.
+ *
+ * @param {string} title The title of the message box.
+ * @param {string} message The message.
+ * @return {remoting.MessageWindow}
+ */
+remoting.MessageWindow.showErrorMessage = function(title, message) {
+  var options = {
+    title: title,
+    message: message,
+    buttonLabel: chrome.i18n.getMessage(/**i18n-content*/'OK'),
+    onResult: remoting.MessageWindow.quitApp
+  };
+  return new remoting.MessageWindow(options);
+};
+
+/**
+ * Static method to create and show a timed message box.
+ *
+ * @param {string} title The title of the message box.
+ * @param {string} message The message.
+ * @param {string} infobox Additional information to be displayed in an infobox,
+ *     or the empty string if there is no additional information.
+ * @param {string} buttonLabel The text for the primary button.
+ * @param {function(number):void} onResult The callback to invoke when the
+ *     user closes the message window.
+ * @param {number} duration Time for wait before calling onTime
+ * @param {?function():void} onTimeout Callback function.
+ * @return {remoting.MessageWindow}
+ */
+remoting.MessageWindow.showTimedMessageWindow = function(
+    title, message, infobox, buttonLabel, onResult, duration, onTimeout) {
+  var options = {
+    title: title,
+    message: message,
+    infobox: infobox,
+    buttonLabel: buttonLabel,
+    onResult: onResult,
+    duration: duration,
+    onTimeout: onTimeout
+  };
+  return new remoting.MessageWindow(options);
+};
+
+/**
+ * Cancel the current connection and close all app windows.
+ *
+ * @param {number} result The dialog result.
+ */
+remoting.MessageWindow.quitApp = function(result) {
+  remoting.MessageWindowManager.closeAllMessageWindows();
+  window.close();
+};