src/chrome/renderer/resources/extensions/extension_options_events.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 EventBindings = require('event_bindings');
   6
   7 var CreateEvent = function(name) {
   8   var eventOpts = {supportsListeners: true, supportsFilters: true};
   9   return new EventBindings.Event(name, undefined, eventOpts);
  10 };
  11
  12 var EXTENSION_OPTIONS_EVENTS = {
  13   'load': {
  14     evt: CreateEvent('extensionOptionsInternal.onLoad'),
  15     fields: []
  16   },
  17   'sizechanged': {
  18     evt: CreateEvent('extensionOptionsInternal.onSizeChanged'),
  19     customHandler: function(handler, event, webViewEvent) {
  20       handler.handleSizeChangedEvent(event, webViewEvent);
  21     },
  22     fields:['width', 'height']
  23   }
  24 }
  25
  26 /**
  27  * @constructor
  28  */
  29 function ExtensionOptionsEvents(extensionOptionsInternal, viewInstanceId) {
  30   this.extensionOptionsInternal = extensionOptionsInternal;
  31   this.viewInstanceId = viewInstanceId;
  32   this.setup();
  33 }
  34
  35 // Sets up events.
  36 ExtensionOptionsEvents.prototype.setup = function() {
  37   for (var eventName in EXTENSION_OPTIONS_EVENTS) {
  38     this.setupEvent(eventName, EXTENSION_OPTIONS_EVENTS[eventName]);
  39   }
  40 };
  41
  42 ExtensionOptionsEvents.prototype.setupEvent = function(name, info) {
  43   var self = this;
  44   info.evt.addListener(function(e) {
  45     var details = {bubbles:true};
  46     if (info.cancelable)
  47       details.cancelable = true;
  48     var extensionOptionsEvent = new Event(name, details);
  49     $Array.forEach(info.fields, function(field) {
  50       if (e.hasOwnProperty(field)) {
  51         extensionOptionsEvent[field] = e[field];
  52       }
  53     });
  54     if (info.customHandler) {
  55       info.customHandler(self, e, extensionOptionsEvent);
  56       return;
  57     }
  58     self.extensionOptionsInternal.dispatchEvent(extensionOptionsEvent);
  59   }, {instanceId: self.viewInstanceId});
  60
  61   this.extensionOptionsInternal.setupEventProperty(name);
  62 };
  63
  64 ExtensionOptionsEvents.prototype.handleSizeChangedEvent = function(
  65     event, extensionOptionsEvent) {
  66   this.extensionOptionsInternal.onSizeChanged(extensionOptionsEvent.width,
  67                                               extensionOptionsEvent.height);
  68   this.extensionOptionsInternal.dispatchEvent(extensionOptionsEvent);
  69 }
  70
  71 exports.ExtensionOptionsEvents = ExtensionOptionsEvents;
  72 exports.CreateEvent = CreateEvent;