Initial implementation of the <extensionoptions> GuestView tag

chrome/renderer/resources/extensions/extension_options.js

+// Copyright (c) 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');
+
+function ExtensionOptionsInternal(extensionoptionsNode) {
+  privates(extensionoptionsNode).internal = this;
+  this.extensionoptionsNode = extensionoptionsNode;
+
+  this.browserPluginNode = this.createBrowserPluginNode();
+  var shadowRoot = this.extensionoptionsNode.createShadowRoot();
+  shadowRoot.appendChild(this.browserPluginNode);
+  this.viewInstanceId = IdGenerator.GetNextId();
+
+  if (parseExtensionAttribute()) {
+    this.allocateInstanceId();
+  }
+}
+
+ExtensionOptionsInternal.prototype.createBrowserPluginNode = function() {
+  var browserPluginNode = new ExtensionOptionsInternal.BrowserPlugin();
+  privates(browserPluginNode).internal = this;
+  return browserPluginNode;
+}
+
+ExtensionOptionsInternal.prototype.parseExtensionAttribute = function() {
+  if (this.extensionoptionsNode.hasAttribute('extension')) {
+    this.extension = this.extensionoptionsNode.getAttribute('extension');
+    return true;
+  }
+  return false;
+}
+
+ExtensionOptionsInternal.prototype.allocateInstanceId = function() {
+  var params = {
+    'extensionId': this.extension,
+  };
+  var self = this;
+  GuestViewInternal.createGuest(
+      'extensionoptions',
+      params,
+      function(instanceId) {
+        self.instanceId = instanceId;
+        // TODO(lazyboy): Make sure this.autoNavigate_ stuff correctly updated
+        // |self.src| at this point.
+        self.attachWindowAndSetUpEvents(self.instanceId, self.src);

[Fady Samuel, 2014/07/08 14:23:40]

This code doesn't do anything...

[ericzeng, 2014/07/08 18:10:48]

Oops, done

+      });

[not at google - send to devlin, 2014/07/08 19:17:25]

FYI a nice pattern (perhaps appview doesn't do this) to be able to use |this|
rather than the |self| hack is to do a .bind(this) on the anonymous function.

function(instanceId) {
  ...
}.bind(this)

+};
+
+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;
+  };
+
+  ExtensionOptionsInternal.BrowserPlugin =
+      DocumentNatives.RegisterElement("extensionoptionsplugin",
+                                       {extends: 'object', prototype: proto});
+  delete proto.createdCallback;
+  delete proto.attachedCallback;
+}
+
+function registerExtensionOptionsElement() {
+  var proto = Object.create(HTMLElement.prototype);
+
+  proto.createdCallback = function() {
+    new ExtensionOptionsInternal(this);
+  }
+
+  // Forward proto.foo* method calls to ExtensionOptionsInternal.foo*.
+  for (var i = 0; methods[i]; ++i) {
+    var createHandler = function(m) {
+      return function(var_args) {
+        var internal = privates(this).internal;
+        return $Function.apply(internal[m], internal, arguments);
+      };
+    };
+    proto[methods[i]] = createHandler(methods[i]);
+  }
+
+  window.ExtensionOptions =
+     DocumentNatives.RegisterElement('extensionoptions', {prototype: proto});
+
+  // Delete the callbacks so developers cannot call them and produce unexpected
+  // behavior.
+  delete proto.createdCallback;
+}
+
+var useCapture = true;
+window.addEventListener('readystatechange', function listener(event) {
+  if (document.readyState == 'loading')
+    return;
+
+  registerBrowserPluginElement();
+  registerExtensionOptionsElement();
+  window.removeEventListener(event.type, listener, useCapture);
+}, useCapture);