Notify all rosters on opening and closing chats,...

chrome/browser/resources/chat_manager/js/gmailbridgehook.js

 // Copyright (c) 2010 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.
 
 // Port used for:
 // 1. forwarding central user requests from the gmail page to the background.
 // 2. forwarding the central user from the background to the gmail page.
 var centralJidListenerGmailPort;
 
 // The gmail page div used to funnel events through.
 var divGmailHandler;
 
 // The current central roster Jid.
 // Requested and cached as early as possible.
 var centralRosterJid;
 
 /**
  * Triggered on a user initiated chat request. Forward to extension to be
  * processed by the Chrome central roster.
  * @param {MessageEvent} event the new chat event.
  */
 function forwardChatEvent(event) {
   var chatJid = event.data;
   chrome.extension.sendRequest({msg: event.type, jid: chatJid});
 }
 
 /**
+ * @param {string} eventType the event type.
+ * @param {string} chatJid the jid to route the chat event to.
+ * TODO(seh): Move into a common JS file and reference from chatbridgehook.js.
+ */
+function dispatchChatEvent(eventType, chatJid) {
+  var chatEvent = document.createEvent('MessageEvent');
+  chatEvent.initMessageEvent(eventType, true, true, chatJid);
+  divGmailHandler.dispatchEvent(chatEvent);
+}
+
+/**
  * Forward central roster Jid to page.
  * @param {string} jid the central roster Jid.
  */
 function dispatchCentralJid(jid) {
-  var outgoingChatEvent = document.createEvent('MessageEvent');
-  outgoingChatEvent.initMessageEvent(
-      ChatBridgeEventTypes.CENTRAL_USER_UPDATE,
-      true, true, jid);
-  divGmailHandler.dispatchEvent(outgoingChatEvent);
+  dispatchChatEvent(ChatBridgeEventTypes.CENTRAL_USER_UPDATE, jid);
 }
 
 /**
  * Setup central roster jid listener.
  * @param {MessageEvent} event the event.
  */
 function setupCentralRosterJidListener(event) {
   if (!centralJidListenerGmailPort) {
     if (centralRosterJid) {
       dispatchCentralJid(centralRosterJid);
     }
     centralJidListenerGmailPort = chrome.extension.connect(
         {name: 'centralJidListener'});
     centralJidListenerGmailPort.onMessage.addListener(function(msg) {
-      centralRosterJid = msg.jid;
-      dispatchCentralJid(centralRosterJid);
+      if (msg.eventType == ChatBridgeEventTypes.CENTRAL_USER_UPDATE) {
+        centralRosterJid = msg.jid;
+      }
+      dispatchChatEvent(msg.eventType, msg.jid);
     });
   }
 }
 
 /**
  * When the page loads, search for the communication channel div.
  */
 function onPageLoaded() {
   divGmailHandler = document.getElementById('mainElement');
   if (divGmailHandler) {
@@ skipping 19 matching lines @@
 
       // The initial centralRosterJid is sent in setupCentralRosterJidListener,
       // but if it's already been called, send it here.
       if (centralJidListenerGmailPort && centralRosterJid) {
         dispatchCentralJid(centralRosterJid);
       }
     }
 );
 
 window.addEventListener("load", onPageLoaded, false);