| // Copyright 2014 The Chromium Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| var DocumentNatives = requireNative('document_natives'); |
| var GuestViewInternal = |
| require('binding').Binding.create('guestViewInternal').generate(); |
| var IdGenerator = requireNative('id_generator'); |
| var guestViewInternalNatives = requireNative('guest_view_internal'); |
| |
| function AppViewInternal(appviewNode) { |
| privates(appviewNode).internal = this; |
| this.appviewNode = appviewNode; |
| this.elementAttached = false; |
| this.pendingGuestCreation = false; |
| |
| this.browserPluginNode = this.createBrowserPluginNode(); |
| var shadowRoot = this.appviewNode.createShadowRoot(); |
| shadowRoot.appendChild(this.browserPluginNode); |
| this.viewInstanceId = IdGenerator.GetNextId(); |
| } |
| |
| AppViewInternal.prototype.getErrorNode = function() { |
| if (!this.errorNode) { |
| this.errorNode = document.createElement('div'); |
| this.errorNode.innerText = 'Unable to connect to app.'; |
| this.errorNode.style.position = 'absolute'; |
| this.errorNode.style.left = '0px'; |
| this.errorNode.style.top = '0px'; |
| this.errorNode.style.width = '100%'; |
| this.errorNode.style.height = '100%'; |
| this.appviewNode.shadowRoot.appendChild(this.errorNode); |
| } |
| return this.errorNode; |
| }; |
| |
| AppViewInternal.prototype.createBrowserPluginNode = function() { |
| // We create BrowserPlugin as a custom element in order to observe changes |
| // to attributes synchronously. |
| var browserPluginNode = new AppViewInternal.BrowserPlugin(); |
| privates(browserPluginNode).internal = this; |
| return browserPluginNode; |
| }; |
| |
| AppViewInternal.prototype.connect = function(app, data, callback) { |
| if (!this.elementAttached || this.pendingGuestCreation) { |
| if (callback) { |
| callback(false); |
| } |
| return; |
| } |
| var createParams = { |
| 'appId': app, |
| 'data': data || {} |
| }; |
| GuestViewInternal.createGuest( |
| 'appview', |
| createParams, |
| function(guestInstanceId) { |
| this.pendingGuestCreation = false; |
| if (guestInstanceId && !this.elementAttached) { |
| GuestViewInternal.destroyGuest(guestInstanceId); |
| guestInstanceId = 0; |
| } |
| if (!guestInstanceId) { |
| this.browserPluginNode.style.visibility = 'hidden'; |
| var errorMsg = 'Unable to connect to app "' + app + '".'; |
| window.console.warn(errorMsg); |
| this.getErrorNode().innerText = errorMsg; |
| if (callback) { |
| callback(false); |
| } |
| return; |
| } |
| this.attachWindow(guestInstanceId); |
| if (callback) { |
| callback(true); |
| } |
| }.bind(this) |
| ); |
| this.pendingGuestCreation = true; |
| }; |
| |
| AppViewInternal.prototype.attachWindow = function(guestInstanceId) { |
| this.guestInstanceId = guestInstanceId; |
| if (!this.internalInstanceId) { |
| return; |
| } |
| var params = { |
| 'instanceId': this.viewInstanceId |
| }; |
| this.browserPluginNode.style.visibility = 'visible'; |
| return guestViewInternalNatives.AttachGuest( |
| this.internalInstanceId, |
| guestInstanceId, |
| params); |
| }; |
| |
| AppViewInternal.prototype.handleBrowserPluginAttributeMutation = |
| function(name, oldValue, newValue) { |
| if (name == 'internalinstanceid' && !oldValue && !!newValue) { |
| this.browserPluginNode.removeAttribute('internalinstanceid'); |
| this.internalInstanceId = parseInt(newValue); |
| |
| if (!!this.guestInstanceId && this.guestInstanceId != 0) { |
| var params = { |
| 'instanceId': this.viewInstanceId |
| }; |
| guestViewInternalNatives.AttachGuest( |
| this.internalInstanceId, |
| this.guestInstanceId, |
| params); |
| } |
| return; |
| } |
| }; |
| |
| AppViewInternal.prototype.reset = function() { |
| if (this.guestInstanceId) { |
| GuestViewInternal.destroyGuest(this.guestInstanceId); |
| this.guestInstanceId = undefined; |
| } |
| }; |
| |
| function registerBrowserPluginElement() { |
| var proto = Object.create(HTMLObjectElement.prototype); |
| |
| proto.createdCallback = function() { |
| this.setAttribute('type', 'application/browser-plugin'); |
| this.style.width = '100%'; |
| this.style.height = '100%'; |
| }; |
| |
| proto.attachedCallback = function() { |
| // Load the plugin immediately. |
| var unused = this.nonExistentAttribute; |
| }; |
| |
| proto.attributeChangedCallback = function(name, oldValue, newValue) { |
| var internal = privates(this).internal; |
| if (!internal) { |
| return; |
| } |
| internal.handleBrowserPluginAttributeMutation(name, oldValue, newValue); |
| }; |
| |
| AppViewInternal.BrowserPlugin = |
| DocumentNatives.RegisterElement('appplugin', {extends: 'object', |
| prototype: proto}); |
| |
| delete proto.createdCallback; |
| delete proto.attachedCallback; |
| delete proto.detachedCallback; |
| delete proto.attributeChangedCallback; |
| } |
| |
| function registerAppViewElement() { |
| var proto = Object.create(HTMLElement.prototype); |
| |
| proto.createdCallback = function() { |
| new AppViewInternal(this); |
| }; |
| |
| proto.attachedCallback = function() { |
| var internal = privates(this).internal; |
| if (!internal) { |
| return; |
| } |
| internal.elementAttached = true; |
| }; |
| |
| proto.detachedCallback = function() { |
| var internal = privates(this).internal; |
| if (!internal) { |
| return; |
| } |
| internal.elementAttached = false; |
| internal.reset(); |
| }; |
| |
| proto.connect = function() { |
| var internal = privates(this).internal; |
| $Function.apply(internal.connect, internal, arguments); |
| } |
| |
| window.AppView = |
| DocumentNatives.RegisterElement('appview', {prototype: proto}); |
| |
| // Delete the callbacks so developers cannot call them and produce unexpected |
| // behavior. |
| delete proto.createdCallback; |
| delete proto.attachedCallback; |
| delete proto.detachedCallback; |
| delete proto.attributeChangedCallback; |
| } |
| |
| var useCapture = true; |
| window.addEventListener('readystatechange', function listener(event) { |
| if (document.readyState == 'loading') |
| return; |
| |
| registerBrowserPluginElement(); |
| registerAppViewElement(); |
| window.removeEventListener(event.type, listener, useCapture); |
| }, useCapture); |