components/sync_driver/resources/types.js

   1 // Copyright 2014 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('chrome.sync.types', function() {
   6   var typeCountersMap = {};
   7
   8   /**
   9    * Redraws the counters table taking advantage of the most recent
  10    * available information.
  11    *
  12    * Makes use of typeCountersMap, which is defined in the containing scope.
  13    */
  14   var refreshTypeCountersDisplay = function() {
  15     var typeCountersArray = [];
  16
  17     // Transform our map into an array to make jstemplate happy.
  18     Object.keys(typeCountersMap).sort().forEach(function(t) {
  19       typeCountersArray.push({
  20         type: t,
  21         counters: typeCountersMap[t],
  22       });
  23     });
  24
  25     jstProcess(
  26         new JsEvalContext({ rows: typeCountersArray }),
  27         $('type-counters-table'));
  28   };
  29
  30   /**
  31    * Helps to initialize the table by picking up where initTypeCounters() left
  32    * off.  That function registers this listener and requests that this event
  33    * be emitted.
  34    *
  35    * @param {!Object} e An event containing the list of known sync types.
  36    */
  37   var onReceivedListOfTypes = function(e) {
  38     var types = e.details.types;
  39     types.map(function(type) {
  40       if (!typeCountersMap.hasOwnProperty(type)) {
  41         typeCountersMap[type] = {};
  42       }
  43     });
  44     chrome.sync.events.removeEventListener(
  45         'onReceivedListOfTypes',
  46         onReceivedListOfTypes);
  47     refreshTypeCountersDisplay();
  48   };
  49
  50   /**
  51    * Callback for receipt of updated per-type counters.
  52    *
  53    * @param {!Object} e An event containing an updated counter.
  54    */
  55   var onCountersUpdated = function(e) {
  56     var details = e.details;
  57
  58     var modelType = details.modelType;
  59     var counters = details.counters;
  60
  61     if (typeCountersMap.hasOwnProperty(modelType))
  62       for (k in counters) {
  63         typeCountersMap[modelType][k] = counters[k];
  64       }
  65     refreshTypeCountersDisplay();
  66   };
  67
  68   /**
  69    * Initializes state and callbacks for the per-type counters and status UI.
  70    */
  71   var initTypeCounters = function() {
  72     chrome.sync.events.addEventListener(
  73         'onCountersUpdated',
  74         onCountersUpdated);
  75     chrome.sync.events.addEventListener(
  76         'onReceivedListOfTypes',
  77         onReceivedListOfTypes);
  78
  79     chrome.sync.requestListOfTypes();
  80     chrome.sync.registerForPerTypeCounters();
  81   };
  82
  83   var onLoad = function() {
  84     initTypeCounters();
  85   };
  86
  87   return {
  88     onLoad: onLoad
  89   };
  90 });
  91
  92 document.addEventListener('DOMContentLoaded', chrome.sync.types.onLoad, false);