chrome/renderer/resources/extensions/tabs_custom_bindings.js

   1 // Copyright (c) 2012 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 // Custom binding for the tabs API.
   6
   7 var binding = require('binding').Binding.create('tabs');
   8
   9 var messaging = require('messaging');
  10 var tabsNatives = requireNative('tabs');
  11 var OpenChannelToTab = tabsNatives.OpenChannelToTab;
  12 var sendRequestIsDisabled = requireNative('process').IsSendRequestDisabled();
  13
  14 binding.registerCustomHook(function(bindingsAPI, extensionId) {
  15   var apiFunctions = bindingsAPI.apiFunctions;
  16   var tabs = bindingsAPI.compiledApi;
  17
  18   apiFunctions.setHandleRequest('connect', function(tabId, connectInfo) {
  19     var name = '';
  20     if (connectInfo) {
  21       name = connectInfo.name || name;
  22     }
  23     var portId = OpenChannelToTab(tabId, extensionId, name);
  24     return messaging.createPort(portId, name);
  25   });
  26
  27   apiFunctions.setHandleRequest('sendRequest',
  28                                 function(tabId, request, responseCallback) {
  29     if (sendRequestIsDisabled)
  30       throw new Error(sendRequestIsDisabled);
  31     var port = tabs.connect(tabId, {name: messaging.kRequestChannel});
  32     messaging.sendMessageImpl(port, request, responseCallback);
  33   });
  34
  35   apiFunctions.setHandleRequest('sendMessage',
  36                                 function(tabId, message, responseCallback) {
  37     var port = tabs.connect(tabId, {name: messaging.kMessageChannel});
  38     messaging.sendMessageImpl(port, message, responseCallback);
  39   });
  40 });
  41
  42 exports.binding = binding.generate();