Add chrome://quota-internals/ resources

chrome/browser/resources/quota_internals/message_dispatcher.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.
+
+// require cr.js
+// require cr/event_target.js
+// require cr/util.js
+
+/**
+ * Bridge between the browser and the page.
+ * In this file:
+ *   * define EventTargets to recieve message from the browser,
+ *   * dispatch browser messages to EventTarget,
+ *   * define interface to request data to the browser.
+ */
+
+cr.define('cr.quota', function() {
+  'use strict';
+
+  /**
+   * Post requestData message to Browser.
+   */
+  function requestData() {
+    chrome.send('requestData');
+  }
+
+  /**
+   * Callback entry point from Browser.
+   * Messages are Dispatched as Event to:
+   *   * onAvailableSpaceUpdated,
+   *   * onGlobalDataUpdated,
+   *   * onHostDataUpdated,
+   *   * onOriginDataUpdated,
+   *   * onStatisticsUpdated.
+   * @param {string} message Message label. Possible Values are:
+   *   * 'AvailableSpaceUpdated',
+   *   * 'GlobalDataUpdated',
+   *   * 'HostDataUpdated',
+   *   * 'OriginDataUpdated',
+   *   * 'StatisticsUpdated'.
+   * @param {Object} detail Message specific additional data.
+   */
+  function messageHandler(message, detail) {
+    var target = null;
+    switch (message) {
+      case 'AvailableSpaceUpdated':
+        target = cr.quota.onAvailableSpaceUpdated;
+        break;
+      case 'GlobalDataUpdated':
+        target = cr.quota.onGlobalDataUpdated;
+        break;
+      case 'HostDataUpdated':
+        target = cr.quota.onHostDataUpdated;
+        break;
+      case 'OriginDataUpdated':
+        target = cr.quota.onOriginDataUpdated;
+        break;
+      case 'StatisticsUpdated':
+        target = cr.quota.onStatisticsUpdated;
+        break;
+      default:
+        console.error('Unknown Message');
+        break;
+    }
+    if (target) {
+      var event = cr.doc.createEvent('CustomEvent');
+      event.initCustomEvent('update', false, false, detail);
+      target.dispatchEvent(event);
+    }
+  }
+
+  return {
+    onAvailableSpaceUpdated: new cr.EventTarget(),
+    onGlobalDataUpdated: new cr.EventTarget(),
+    onHostDataUpdated: new cr.EventTarget(),
+    onOriginDataUpdated: new cr.EventTarget(),
+    onStatisticsUpdated: new cr.EventTarget(),
+
+    requestData: requestData,
+    messageHandler: messageHandler
+  };
+});