src/extensions/shell/renderer/shell_custom_bindings.js

   1 // Copyright 2014 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 var shellNatives = requireNative('shell_natives');
   6 var Binding = require('binding').Binding;
   7 var forEach = require('utils').forEach;
   8 var renderViewObserverNatives = requireNative('renderViewObserverNatives');
   9
  10 var currentAppWindow = null;
  11
  12 var shell = Binding.create('shell');
  13 shell.registerCustomHook(function(bindingsAPI) {
  14   var apiFunctions = bindingsAPI.apiFunctions;
  15
  16   apiFunctions.setCustomCallback('createWindow',
  17                                  function(name, request, windowParams) {
  18     var view = null;
  19
  20     // When window creation fails, |windowParams| will be undefined.
  21     if (windowParams && windowParams.viewId) {
  22       view = shellNatives.GetView(windowParams.viewId);
  23     }
  24
  25     if (!view) {
  26       // No route to created window. If given a callback, trigger it with an
  27       // undefined object.
  28       if (request.callback) {
  29         request.callback(undefined);
  30         delete request.callback;
  31       }
  32       return;
  33     }
  34
  35     // Initialize the app window in the newly created JS context
  36     view.chrome.shell.initializeAppWindow();
  37
  38     var callback = request.callback;
  39     if (callback) {
  40       delete request.callback;
  41
  42       var willCallback =
  43           renderViewObserverNatives.OnDocumentElementCreated(
  44               windowParams.viewId,
  45               function(success) {
  46                 if (success) {
  47                   callback(view.chrome.shell.currentWindow());
  48                 } else {
  49                   callback(undefined);
  50                 }
  51               });
  52       if (!willCallback) {
  53         callback(undefined);
  54       }
  55     }
  56   });
  57
  58   apiFunctions.setHandleRequest('currentWindow', function() {
  59     if (!currentAppWindow) {
  60       console.error(
  61           'The JavaScript context calling chrome.shell.currentWindow() has' +
  62           ' no associated AppWindow.');
  63       return null;
  64     }
  65     return currentAppWindow;
  66   });
  67
  68   // This is an internal function, but needs to be bound into a closure
  69   // so the correct JS context is used for global variables such as
  70   // currentAppWindow.
  71   apiFunctions.setHandleRequest('initializeAppWindow', function() {
  72     var AppWindow = function() {};
  73     AppWindow.prototype.contentWindow = window;
  74     currentAppWindow = new AppWindow;
  75   });
  76 });
  77
  78 exports.binding = shell.generate();