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 var forEach = require('utils').forEach;
  14
  15 binding.registerCustomHook(function(bindingsAPI, extensionId) {
  16   var apiFunctions = bindingsAPI.apiFunctions;
  17   var tabs = bindingsAPI.compiledApi;
  18
  19   apiFunctions.setHandleRequest('connect', function(tabId, connectInfo) {
  20     var name = '';
  21     var frameId = -1;
  22     if (connectInfo) {
  23       name = connectInfo.name || name;
  24       frameId = connectInfo.frameId;
  25       if (typeof frameId == 'undefined' || frameId < 0)
  26         frameId = -1;
  27     }
  28     var portId = OpenChannelToTab(tabId, frameId, extensionId, name);
  29     return messaging.createPort(portId, name);
  30   });
  31
  32   apiFunctions.setHandleRequest('sendRequest',
  33                                 function(tabId, request, responseCallback) {
  34     if (sendRequestIsDisabled)
  35       throw new Error(sendRequestIsDisabled);
  36     var port = tabs.connect(tabId, {name: messaging.kRequestChannel});
  37     messaging.sendMessageImpl(port, request, responseCallback);
  38   });
  39
  40   apiFunctions.setHandleRequest('sendMessage',
  41       function(tabId, message, options, responseCallback) {
  42     var connectInfo = {
  43       name: messaging.kMessageChannel
  44     };
  45     if (options) {
  46       forEach(options, function(k, v) {
  47         connectInfo[k] = v;
  48       });
  49     }
  50
  51     var port = tabs.connect(tabId, connectInfo);
  52     messaging.sendMessageImpl(port, message, responseCallback);
  53   });
  54 });
  55
  56 exports.binding = binding.generate();