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