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<!DOCTYPE html>
<html>
<!--
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.
Extension purpose: route all Google Talk chats through the central roster
hosted in this extension. The included logic is paired with logic in Gmail
to route both incoming and outgoing chats through this central roster.
-->
<body>
<iframe
id='centralRoster'
src='central_roster.html'>Central Roster</iframe>
<script src="js/chatbridgeeventtypes.js"></script>
<script>
var centralRosterJid;
var centralRosterPort;
var centralJidListenerPorts = [];
// Notify all port listeners of updated central roster jid.
function forwardCentralRosterJidToPortListeners() {
for (var listenerPort in centralJidListenerPorts) {
listenerPort.postMessage({jid: centralRosterJid});
}
}
// Central roster jid changed. Notify all listeners.
function centralJidUpdate(msg) {
if (centralRosterJid != msg.jid) {
centralRosterJid = msg.jid;
forwardCentralRosterJidToPortListeners();
}
}
// Listen for content script connections.
chrome.extension.onConnect.addListener(function(port) {
// New central jid listener.
// Update with current central roster jid, and add to tracking array.
if (port.name == 'centralJidListener') {
centralJidListenerPorts.push(port);
// Clear tracking array entry when content script closes.
port.onDisconnect.addListener(function(port) {
for (var index = 0; index < centralJidListenerPorts.length; ++index) {
var listenerPort = centralJidListenerPorts[index];
if (listenerPort == port) {
centralJidListenerPorts.splice(index, 1);
break;
}
}
});
if (centralRosterJid) {
port.postMessage({jid: centralRosterJid});
}
// New central jid broadcaster.
// Add listener for jid changes, and track port for forwarding chats.
} else if (port.name == 'centralJidBroadcaster') {
if (centralRosterPort != port) {
if (centralRosterPort) {
centralRosterPort.onMessage.removeListener(centralJidUpdate);
}
centralRosterPort = port;
centralRosterPort.onMessage.addListener(centralJidUpdate);
// Clear listener and central roster jid when content script closes
centralRosterPort.onDisconnect.addListener(function(port) {
if (centralRosterPort) {
centralRosterPort.onMessage.removeListener(centralJidUpdate);
centralRosterPort = null;
centralJidUpdate({jid: null});
}
});
}
}
});
// Listen for requests from our content scripts.
chrome.extension.onRequest.addListener(function(request, sender) {
switch (request.msg) {
// For new initiated chats, forward to the central roster port.
case ChatBridgeEventTypes.SHOW_CHAT:
case ChatBridgeEventTypes.START_VIDEO:
case ChatBridgeEventTypes.START_VOICE:
if (centralRosterPort) {
centralRosterPort.postMessage(
{chatType: request.msg, jid: request.jid});
} else {
// We should not have been forwarded this message. Make sure our
// listeners are updated with the current central roster jid.
forwardCentralRosterJidToPortListeners();
}
break;
}
});
</script>
</body>
</html>
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