chrome/test/data/chromeos/file_manager/share_dialog_mock/main.js

   1 // Copyright 2013 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 // Namespace for the share dialog mock.
   6 var shareDialog = {};
   7
   8 /**
   9  * Origin of Files.app.
  10  * @type {string}
  11  * @const
  12  */
  13 shareDialog.EMBEDDER_ORIGIN =
  14     'chrome-extension://hhaomjibdihmijegdhdafkllkbggdgoj';
  15
  16 /**
  17  * Target width of the sharing window in pixels.
  18  * @type {number}
  19  * @const
  20  */
  21 shareDialog.TARGET_WIDTH = 350;
  22
  23 /**
  24  * Target height of the sharing window in pixels.
  25  * @type {number}
  26  * @const
  27  */
  28 shareDialog.TARGET_HEIGHT = 250;
  29
  30 /**
  31  * Target window of Files.app. Used to communicate over messages. Filled out
  32  * once the first message from the embedder arrives.
  33  * @type {Window}
  34  */
  35 shareDialog.embedderTarget = null;
  36
  37 /**
  38  * List of pending messages enqueued to be sent before establishing the target.
  39  * @type {Array.<Object>}
  40  */
  41 shareDialog.pendingMessages = [];
  42
  43 /**
  44  * Sends a message to the embedder. If the embedder target is not available,
  45  * then enqueues them. Such enqueued messages will be sent as soon as the target
  46  * is available.
  47  *
  48  * @param {string} type Message identifier
  49  * @param {Object=} opt_args Arguments for the message.
  50  * @private
  51  */
  52 shareDialog.sendMessage_ = function(type, opt_args) {
  53   if (!shareDialog.embedderTarget) {
  54     shareDialog.pendingMessages.push({type: type, args: opt_args});
  55     return;
  56   }
  57
  58   var data = {};
  59   data.type = type;
  60   if (opt_args)
  61     data.args = opt_args;
  62
  63   shareDialog.embedderTarget.postMessage(JSON.stringify(data),
  64                                          shareDialog.EMBEDDER_ORIGIN);
  65 };
  66
  67 /**
  68  * Handles a request from the embedder to make the body visible.
  69  * @private
  70  */
  71 shareDialog.onMakeBodyVisible_ = function() {
  72   document.body.style.display = '';
  73 };
  74
  75 /**
  76  * Handles an event from the embedder than preparation to show the contents
  77  * is done.
  78  * @private
  79  */
  80 shareDialog.onPrepareComplete_ = function() {
  81   shareDialog.resize();
  82 };
  83
  84 /**
  85  * Handles an event from the embedder than preparation resize the window is
  86  * done.
  87  * @private
  88  */
  89 shareDialog.onResizeComplete_ = function() {
  90   var container = document.querySelector('#container');
  91   container.style.width = shareDialog.TARGET_WIDTH + 'px';
  92   container.style.height = shareDialog.TARGET_HEIGHT + 'px';
  93 };
  94
  95 /**
  96  * Changes the visibility of the dialog.
  97  * @param {boolean} visible True to set the dialog visible, false to set it
  98  *     invisible.
  99  */
 100 shareDialog.setVisible = function(visible) {
 101   shareDialog.sendMessage_('setVisible', {visible: visible});
 102 };
 103
 104 /**
 105  * Prepares the embedder to make the contents visible.
 106  */
 107 shareDialog.prepareForVisible = function() {
 108   shareDialog.sendMessage_('prepareForVisible');
 109 };
 110
 111 /**
 112  * Resizes the embedder to the content window dimensions.
 113  */
 114 shareDialog.resize = function() {
 115   shareDialog.sendMessage_('prepareForResize');
 116 };
 117
 118 /**
 119  * Handles messages sent by the embedder. If it is the first message, then
 120  * the target is established and all enqueued messages to be sent to the
 121  * embedder are sent before handling the message from the embedder.
 122  *
 123  * @param {Event} message Message event.
 124  * @private
 125  */
 126 shareDialog.onMessage_ = function(message) {
 127   if (message.origin != shareDialog.EMBEDDER_ORIGIN)
 128     return;
 129
 130   if (!shareDialog.embedderTarget) {
 131     shareDialog.embedderTarget = message.source;
 132     for (var i = 0; i < shareDialog.pendingMessages.length; i++) {
 133       shareDialog.sendMessage_(shareDialog.pendingMessages[i].type,
 134                                shareDialog.pendingMessages[i].args);
 135     }
 136     shareDialog.pendingMessages = [];
 137   }
 138
 139   var packet = JSON.parse(message.data)
 140   var type = packet.type;
 141   var args = packet.args;
 142
 143   switch (type) {
 144     case 'makeBodyVisible':
 145       shareDialog.onMakeBodyVisible_(args);
 146       break;
 147     case 'prepareComplete':
 148       shareDialog.onPrepareComplete_(args);
 149       break;
 150     case 'resizeComplete':
 151       shareDialog.onResizeComplete_(args);
 152       break;
 153   }
 154 };
 155
 156 /**
 157  * Initializes the mocked share dialog.
 158  */
 159 shareDialog.initialize = function() {
 160   window.addEventListener('message', shareDialog.onMessage_);
 161   shareDialog.prepareForVisible();
 162 };
 163
 164 window.addEventListener('load', shareDialog.initialize);