ntp4: add app context menu

chrome/browser/resources/ntp4/new_tab.js

 // Copyright (c) 2011 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 /**
  * @fileoverview New tab page
  * This is the main code for the new tab page used by touch-enabled Chrome
  * browsers.  For now this is still a prototype.
  */
 
@@ skipping 227 matching lines @@
    * Given a theme resource name, construct a URL for it.
    * @param {string} resourceName The name of the resource.
    * @return {string} A url which can be used to load the resource.
    */
   function getThemeUrl(resourceName) {
     return 'chrome://theme/' + resourceName;
   }
 
   /**
    * Callback invoked by chrome whenever an app preference changes.
-   * The normal NTP uses this to keep track of the current launch-type of an
-   * app, updating the choices in the context menu.  We don't have such a menu
-   * so don't use this at all (but it still needs to be here for chrome to
-   * call).
    * @param {Object} data An object with all the data on available
-   *        applications.
+   *     applications.
    */
   function appsPrefChangeCallback(data) {
+    var apps = document.querySelectorAll('.app');
+
+    // This is an expensive operation. We minimize how frequently it's called
+    // by only calling it for changes across different instances of the NTP
+    // (i.e. two separate tabs both showing NTP).
+    for (var j = 0; j < data.apps.length; ++j) {
+      for (var i = 0; i < apps.length; ++i) {
+        if (data.apps[j]['id'] == apps[i].appId)
+          apps[i].appData = data.apps[j];
+      }
+    }
   }
 
   function getCardSlider() {
     return cardSlider;
   }
 
   /**
    * Invoked whenever the pages in apps-page-list have changed so that
    * the Slider knows about the new elements.
    */
@@ skipping 183 matching lines @@
 // TODO(estade): update the content handlers to use ntp namespace instead of
 // making these global.
 var assert = ntp4.assert;
 var getAppsCallback = ntp4.getAppsCallback;
 var appsPrefChangeCallback = ntp4.appsPrefChangeCallback;
 var themeChanged = ntp4.themeChanged;
 var recentlyClosedTabs = ntp4.setRecentlyClosedTabs;
 var setMostVisitedPages = ntp4.setMostVisitedPages;
 
 document.addEventListener('DOMContentLoaded', ntp4.initialize);