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 <webview> contextMenus API.
6// Note that this file mimics custom bindings for chrome.contextMenus API
7// which resides in context_menus_custom_bindings.js. The functions in this file
8// have an extra instanceId parameter in the beginning, which corresponds to the
9// id of the <webview>.
10//
11// TODO(lazyboy): Share common code /w context_menus_custom_bindings.js.
12
13var EventBindings = require('event_bindings');
14var binding = require('binding').Binding.create('chromeWebViewInternal');
15var contextMenuNatives = requireNative('context_menus');
16var sendRequest = require('sendRequest').sendRequest;
17
18binding.registerCustomHook(function(bindingsAPI) {
19  var apiFunctions = bindingsAPI.apiFunctions;
20
21  var webviewContextMenus = {};
22  webviewContextMenus.generatedIdHandlers = {};
23  webviewContextMenus.stringIdHandlers = {};
24
25  // Per item event handler.
26  var ename = 'webViewInternal.contextMenus';
27  webviewContextMenus.event = new EventBindings.Event(ename);
28
29  webviewContextMenus.getIdFromCreateProperties = function(prop) {
30    if (typeof(prop.id) !== 'undefined')
31      return prop.id;
32    return prop.generatedId;
33  };
34
35  webviewContextMenus.handlersForId = function(instanceId, id) {
36    if (typeof(id) === 'number') {
37      if (!webviewContextMenus.generatedIdHandlers[instanceId]) {
38        webviewContextMenus.generatedIdHandlers[instanceId] = {};
39      }
40      return webviewContextMenus.generatedIdHandlers[instanceId];
41    }
42
43    if (!webviewContextMenus.stringIdHandlers[instanceId]) {
44      webviewContextMenus.stringIdHandlers[instanceId] = {};
45    }
46    return webviewContextMenus.stringIdHandlers[instanceId];
47  };
48
49  webviewContextMenus.ensureListenerSetup = function() {
50    if (webviewContextMenus.listening) {
51      return;
52    }
53    webviewContextMenus.listening = true;
54    webviewContextMenus.event.addListener(function() {
55      // An extension context menu item has been clicked on - fire the onclick
56      // if there is one.
57      var id = arguments[0].menuItemId;
58      var instanceId = arguments[0].webviewInstanceId;
59      delete arguments[0].webviewInstanceId;
60      var onclick = webviewContextMenus.handlersForId(instanceId, id)[id];
61      if (onclick) {
62        $Function.apply(onclick, null, arguments);
63      }
64    });
65  };
66
67  apiFunctions.setHandleRequest('contextMenusCreate', function() {
68    var args = arguments;
69    var id = contextMenuNatives.GetNextContextMenuId();
70    args[1].generatedId = id;
71
72    var optArgs = {
73      customCallback: this.customCallback,
74    };
75
76    sendRequest(this.name, args, this.definition.parameters, optArgs);
77    return webviewContextMenus.getIdFromCreateProperties(args[1]);
78  });
79
80  apiFunctions.setCustomCallback('contextMenusCreate',
81                                 function(name, request, response) {
82    if (chrome.runtime.lastError) {
83      return;
84    }
85
86    var instanceId = request.args[0];
87    var id = webviewContextMenus.getIdFromCreateProperties(request.args[1]);
88    var onclick = request.args.length ? request.args[1].onclick : null;
89    if (onclick) {
90      webviewContextMenus.ensureListenerSetup();
91      webviewContextMenus.handlersForId(instanceId, id)[id] = onclick;
92    }
93  });
94
95  apiFunctions.setCustomCallback('contextMenusUpdate',
96                                 function(name, request, response) {
97    if (chrome.runtime.lastError) {
98      return;
99    }
100    var instanceId = request.args[0];
101    var id = request.args[1];
102    if (request.args[2].onclick) {
103      webviewContextMenus.handlersForId(instanceId, id)[id] =
104          request.args[2].onclick;
105    }
106  });
107
108  apiFunctions.setCustomCallback('contextMenusRemove',
109                                  function(name, request, response) {
110    if (chrome.runtime.lastError) {
111      return;
112    }
113    var instanceId = request.args[0];
114    var id = request.args[1];
115    delete webviewContextMenus.handlersForId(instanceId, id)[id];
116  });
117
118  apiFunctions.setCustomCallback('contextMenusRemoveAll',
119                                 function(name, request, response) {
120    if (chrome.runtime.lastError) {
121      return;
122    }
123    var instanceId = request.args[0];
124    webviewContextMenus.stringIdHandlers[instanceId] = {};
125    webviewContextMenus.generatedIdHandlers[instanceId] = {};
126  });
127
128});
129
130exports.ChromeWebView = binding.generate();
131