chrome/browser/resources/components.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 'use strict';
   6
   7 /**
   8  * Takes the |componentsData| input argument which represents data about the
   9  * currently installed components and populates the html jstemplate with
  10  * that data. It expects an object structure like the above.
  11  * @param {Object} componentsData Detailed info about installed components.
  12  *      Same expected format as returnComponentsData().
  13  */
  14 function renderTemplate(componentsData) {
  15   // This is the javascript code that processes the template:
  16   var input = new JsEvalContext(componentsData);
  17   var output = $('componentTemplate');
  18   jstProcess(input, output);
  19 }
  20
  21 /**
  22  * Asks the C++ ComponentsDOMHandler to get details about the installed
  23  * components.
  24  * The ComponentsDOMHandler should reply to returnComponentsData() (below).
  25  */
  26 function requestComponentsData() {
  27   chrome.send('requestComponentsData');
  28 }
  29
  30 /**
  31  * Called by the WebUI to re-populate the page with data representing the
  32  * current state of installed components.
  33  * @param {Object} componentsData Detailed info about installed components. The
  34  *     template expects each component's format to match the following
  35  *     structure to correctly populate the page:
  36  *   {
  37  *     components: [
  38  *       {
  39  *          name: 'Component1',
  40  *          version: '1.2.3',
  41  *       },
  42  *       {
  43  *          name: 'Component2',
  44  *          version: '4.5.6',
  45  *       },
  46  *     ]
  47  *   }
  48  */
  49 function returnComponentsData(componentsData) {
  50   var bodyContainer = $('body-container');
  51   var body = document.body;
  52
  53   bodyContainer.style.visibility = 'hidden';
  54   body.className = '';
  55
  56   renderTemplate(componentsData);
  57
  58   // Add handlers to dynamically created HTML elements.
  59   var links = document.getElementsByClassName('button-check-update');
  60   for (var i = 0; i < links.length; i++) {
  61     links[i].onclick = function(e) {
  62       handleCheckUpdate(this);
  63       e.preventDefault();
  64     };
  65   }
  66
  67   // Disable some controls for Guest in ChromeOS.
  68   if (cr.isChromeOS)
  69     uiAccountTweaks.UIAccountTweaks.applyGuestModeVisibility(document);
  70
  71   bodyContainer.style.visibility = 'visible';
  72   body.className = 'show-tmi-mode-initial';
  73 }
  74
  75 /**
  76  * Handles an 'enable' or 'disable' button getting clicked.
  77  * @param {HTMLElement} node The HTML element representing the component
  78  *     being checked for update.
  79  */
  80 function handleCheckUpdate(node) {
  81   node.disabled = true;
  82   // Tell the C++ ComponentssDOMHandler to check for update.
  83   chrome.send('checkUpdate', [String(node.id)]);
  84 }
  85
  86 // Get data and have it displayed upon loading.
  87 document.addEventListener('DOMContentLoaded', requestComponentsData);
  88
  89 // Add handlers to static HTML elements.
  90 $('button-check-update').onclick = handleCheckUpdate;