extensions/renderer/resources/context_menus_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 // Custom binding for the contextMenus API.
   6
   7 var binding = require('binding').Binding.create('contextMenus');
   8
   9 var contextMenuNatives = requireNative('context_menus');
  10 var sendRequest = require('sendRequest').sendRequest;
  11 var Event = require('event_bindings').Event;
  12 var lastError = require('lastError');
  13
  14 binding.registerCustomHook(function(bindingsAPI) {
  15   var apiFunctions = bindingsAPI.apiFunctions;
  16
  17   var contextMenus = {};
  18   contextMenus.generatedIdHandlers = {};
  19   contextMenus.stringIdHandlers = {};
  20   var eventName = 'contextMenus';
  21   contextMenus.event = new Event(eventName);
  22   contextMenus.getIdFromCreateProperties = function(prop) {
  23     if (typeof(prop.id) !== 'undefined')
  24       return prop.id;
  25     return prop.generatedId;
  26   };
  27   contextMenus.handlersForId = function(id) {
  28     if (typeof(id) === 'number')
  29       return contextMenus.generatedIdHandlers;
  30     return contextMenus.stringIdHandlers;
  31   };
  32   contextMenus.ensureListenerSetup = function() {
  33     if (contextMenus.listening) {
  34       return;
  35     }
  36     contextMenus.listening = true;
  37     contextMenus.event.addListener(function() {
  38       // An extension context menu item has been clicked on - fire the onclick
  39       // if there is one.
  40       var id = arguments[0].menuItemId;
  41       var onclick = contextMenus.handlersForId(id)[id];
  42       if (onclick) {
  43         $Function.apply(onclick, null, arguments);
  44       }
  45     });
  46   };
  47
  48   apiFunctions.setHandleRequest('create', function() {
  49     var args = arguments;
  50     var id = contextMenuNatives.GetNextContextMenuId();
  51     args[0].generatedId = id;
  52     var optArgs = {
  53       customCallback: this.customCallback,
  54     };
  55     sendRequest(this.name, args, this.definition.parameters, optArgs);
  56     return contextMenus.getIdFromCreateProperties(args[0]);
  57   });
  58
  59   apiFunctions.setCustomCallback('create',
  60       function(name, request, callback, response) {
  61     if (lastError.hasError(chrome)) {
  62       if (callback)
  63         callback();
  64       return;
  65     }
  66
  67     var id = contextMenus.getIdFromCreateProperties(request.args[0]);
  68
  69     // Set up the onclick handler if we were passed one in the request.
  70     var onclick = request.args.length ? request.args[0].onclick : null;
  71     if (onclick) {
  72       contextMenus.ensureListenerSetup();
  73       contextMenus.handlersForId(id)[id] = onclick;
  74     }
  75     if (callback)
  76       callback();
  77   });
  78
  79   apiFunctions.setCustomCallback('remove',
  80       function(name, request, callback, response) {
  81     if (lastError.hasError(chrome)) {
  82       if (callback)
  83         callback();
  84       return;
  85     }
  86     var id = request.args[0];
  87     delete contextMenus.handlersForId(id)[id];
  88     if (callback)
  89       callback();
  90   });
  91
  92   apiFunctions.setCustomCallback('update',
  93       function(name, request, callback, response) {
  94     if (lastError.hasError(chrome)) {
  95       if (callback)
  96         callback();
  97       return;
  98     }
  99     var id = request.args[0];
 100     if (request.args[1].onclick) {
 101       contextMenus.handlersForId(id)[id] = request.args[1].onclick;
 102     }
 103     if (callback)
 104       callback();
 105   });
 106
 107   apiFunctions.setCustomCallback('removeAll',
 108       function(name, request, callback, response) {
 109     if (lastError.hasError(chrome)) {
 110       if (callback)
 111         callback();
 112       return;
 113     }
 114     contextMenus.generatedIdHandlers = {};
 115     contextMenus.stringIdHandlers = {};
 116     if (callback)
 117       callback();
 118   });
 119 });
 120
 121 exports.binding = binding.generate();