chrome/browser/resources/help/channel_change_page.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 cr.define('help', function() {
   6   var Page = cr.ui.pageManager.Page;
   7   var PageManager = cr.ui.pageManager.PageManager;
   8
   9   /**
  10    * Encapsulated handling of the channel change overlay.
  11    */
  12   function ChannelChangePage() {
  13     Page.call(this, 'channel-change-page', '', 'channel-change-page');
  14   }
  15
  16   cr.addSingletonGetter(ChannelChangePage);
  17
  18   ChannelChangePage.prototype = {
  19     __proto__: Page.prototype,
  20
  21     /**
  22      * Name of the channel the device is currently on.
  23      * @private
  24      */
  25     currentChannel_: null,
  26
  27     /**
  28      * Name of the channel the device is supposed to be on.
  29      * @private
  30      */
  31     targetChannel_: null,
  32
  33     /**
  34      * True iff the device is enterprise-managed.
  35      * @private
  36      */
  37     isEnterpriseManaged_: undefined,
  38
  39     /**
  40      * List of the channels names, from the least stable to the most stable.
  41      * @private
  42      */
  43     channelList_: ['dev-channel', 'beta-channel', 'stable-channel'],
  44
  45     /**
  46      * List of the possible ui states.
  47      * @private
  48      */
  49     uiClassTable_: ['selected-channel-requires-powerwash',
  50                     'selected-channel-requires-delayed-update',
  51                     'selected-channel-good',
  52                     'selected-channel-unstable'],
  53
  54     /** override */
  55     initializePage: function() {
  56       Page.prototype.initializePage.call(this);
  57
  58       $('channel-change-page-cancel-button').onclick =
  59         PageManager.closeOverlay.bind(PageManager);
  60
  61       var self = this;
  62       var options = this.getAllChannelOptions_();
  63       for (var i = 0; i < options.length; i++) {
  64         var option = options[i];
  65         option.onclick = function() {
  66           self.updateUI_(this.value);
  67         };
  68       }
  69
  70       $('channel-change-page-powerwash-button').onclick = function() {
  71         self.setChannel_(self.getSelectedOption_(), true);
  72         PageManager.closeOverlay();
  73       };
  74
  75       $('channel-change-page-change-button').onclick = function() {
  76         self.setChannel_(self.getSelectedOption_(), false);
  77         PageManager.closeOverlay();
  78       };
  79     },
  80
  81     /** @override */
  82     didShowPage: function() {
  83       if (this.targetChannel_ != null)
  84         this.selectOption_(this.targetChannel_);
  85       else if (this.currentChannel_ != null)
  86         this.selectOption_(this.currentChannel_);
  87       var options = this.getAllChannelOptions_();
  88       for (var i = 0; i < options.length; i++) {
  89         var option = options[i];
  90         if (option.checked)
  91           option.focus();
  92       }
  93     },
  94
  95     /**
  96      * Returns the list of all radio buttons responsible for channel selection.
  97      * @return {NodeList} Array of radio buttons
  98      * @private
  99      */
 100     getAllChannelOptions_: function() {
 101       return this.pageDiv.querySelectorAll('input[type="radio"]');
 102     },
 103
 104     /**
 105      * Returns value of the selected option.
 106      * @return {?string} Selected channel name or null, if neither
 107      *     option is selected.
 108      * @private
 109      */
 110     getSelectedOption_: function() {
 111       var options = this.getAllChannelOptions_();
 112       for (var i = 0; i < options.length; i++) {
 113         var option = options[i];
 114         if (option.checked)
 115           return option.value;
 116       }
 117       return null;
 118     },
 119
 120     /**
 121      * Selects option for a given channel.
 122      * @param {string} channel Name of channel option that should be selected.
 123      * @private
 124      */
 125     selectOption_: function(channel) {
 126       var options = this.getAllChannelOptions_();
 127       for (var i = 0; i < options.length; i++) {
 128         var option = options[i];
 129         if (option.value == channel) {
 130           option.checked = true;
 131         }
 132       }
 133       this.updateUI_(channel);
 134     },
 135
 136     /**
 137      * Updates UI according to selected channel.
 138      * @param {string} selectedChannel Selected channel
 139      * @private
 140      */
 141     updateUI_: function(selectedChannel) {
 142       var currentStability = this.channelList_.indexOf(this.currentChannel_);
 143       var newStability = this.channelList_.indexOf(selectedChannel);
 144
 145       var newOverlayClass = null;
 146
 147       if (selectedChannel == this.currentChannel_) {
 148         if (this.currentChannel_ != this.targetChannel_) {
 149           // Allow user to switch back to the current channel.
 150           newOverlayClass = 'selected-channel-good';
 151         }
 152       } else if (selectedChannel != this.targetChannel_) {
 153         // Selected channel isn't equal to the current and target channel.
 154         if (newStability > currentStability) {
 155           // More stable channel is selected. For customer devices
 156           // notify user about powerwash.
 157           if (this.isEnterpriseManaged_)
 158             newOverlayClass = 'selected-channel-requires-delayed-update';
 159           else
 160             newOverlayClass = 'selected-channel-requires-powerwash';
 161         } else if (selectedChannel == 'dev-channel') {
 162           // Warn user about unstable channel.
 163           newOverlayClass = 'selected-channel-unstable';
 164         } else {
 165           // Switching to the less stable channel.
 166           newOverlayClass = 'selected-channel-good';
 167         }
 168       }
 169
 170       // Switch to the new UI state.
 171       for (var i = 0; i < this.uiClassTable_.length; i++)
 172         this.pageDiv.classList.remove(this.uiClassTable_[i]);
 173
 174       if (newOverlayClass)
 175         this.pageDiv.classList.add(newOverlayClass);
 176     },
 177
 178     /**
 179      * Sets the device target channel.
 180      * @param {string} channel The name of the target channel
 181      * @param {boolean} isPowerwashAllowed True iff powerwash is allowed
 182      * @private
 183      */
 184     setChannel_: function(channel, isPowerwashAllowed) {
 185       this.targetChannel_ = channel;
 186       this.updateUI_(channel);
 187       help.HelpPage.setChannel(channel, isPowerwashAllowed);
 188     },
 189
 190     /**
 191      * Updates page UI according to device owhership policy.
 192      * @param {boolean} isEnterpriseManaged True if the device is
 193      *     enterprise managed
 194      * @private
 195      */
 196     updateIsEnterpriseManaged_: function(isEnterpriseManaged) {
 197       this.isEnterpriseManaged_ = isEnterpriseManaged;
 198     },
 199
 200     /**
 201      * Updates name of the current channel, i.e. the name of the
 202      * channel the device is currently on.
 203      * @param {string} channel The name of the current channel
 204      * @private
 205      */
 206     updateCurrentChannel_: function(channel) {
 207      if (this.channelList_.indexOf(channel) < 0)
 208         return;
 209       this.currentChannel_ = channel;
 210       this.selectOption_(channel);
 211     },
 212
 213     /**
 214      * Updates name of the target channel, i.e. the name of the
 215      * channel the device is supposed to be in case of a pending
 216      * channel change.
 217      * @param {string} channel The name of the target channel
 218      * @private
 219      */
 220     updateTargetChannel_: function(channel) {
 221       if (this.channelList_.indexOf(channel) < 0)
 222         return;
 223       this.targetChannel_ = channel;
 224     },
 225
 226     /**
 227      * @return {boolean} True if the page is ready and can be
 228      *     displayed, false otherwise
 229      * @private
 230      */
 231     isPageReady_: function() {
 232       if (typeof this.isEnterpriseManaged_ == 'undefined')
 233         return false;
 234       if (!this.currentChannel_ || !this.targetChannel_)
 235         return false;
 236       return true;
 237     },
 238   };
 239
 240   ChannelChangePage.updateIsEnterpriseManaged = function(isEnterpriseManaged) {
 241     ChannelChangePage.getInstance().updateIsEnterpriseManaged_(
 242         isEnterpriseManaged);
 243   };
 244
 245   ChannelChangePage.updateCurrentChannel = function(channel) {
 246     ChannelChangePage.getInstance().updateCurrentChannel_(channel);
 247   };
 248
 249   ChannelChangePage.updateTargetChannel = function(channel) {
 250     ChannelChangePage.getInstance().updateTargetChannel_(channel);
 251   };
 252
 253   ChannelChangePage.isPageReady = function() {
 254     return ChannelChangePage.getInstance().isPageReady_();
 255   };
 256
 257   // Export
 258   return {
 259     ChannelChangePage: ChannelChangePage
 260   };
 261 });