Moving web_view.js to extensions.

chrome/renderer/resources/extensions/web_view_experimental.js

-// Copyright 2013 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.
-
-// This module implements experimental API for <webview>.
-// See web_view.js for details.
-//
-// <webview> Experimental API is only available on canary and dev channels of
-// Chrome.
-
-var ContextMenusSchema =
-    requireNative('schema_registry').GetSchema('contextMenus');
-var CreateEvent = require('webViewEvents').CreateEvent;
-var EventBindings = require('event_bindings');
-var MessagingNatives = requireNative('messaging_natives');
-//var WebView = require('webViewInternal').WebView;
-var ChromeWebView = require('chromeWebViewInternal').ChromeWebView;
-var WebViewInternal = require('webView').WebViewInternal;
-var ChromeWebViewSchema =
-    requireNative('schema_registry').GetSchema('chromeWebViewInternal');
-var idGeneratorNatives = requireNative('id_generator');
-var utils = require('utils');
-
-function GetUniqueSubEventName(eventName) {
-  return eventName + "/" + idGeneratorNatives.GetNextId();
-}
-
-// This is the only "webViewInternal.onClicked" named event for this renderer.
-//
-// Since we need an event per <webview>, we define events with suffix
-// (subEventName) in each of the <webview>. Behind the scenes, this event is
-// registered as a ContextMenusEvent, with filter set to the webview's
-// |viewInstanceId|. Any time a ContextMenusEvent is dispatched, we re-dispatch
-// it to the subEvent's listeners. This way
-// <webview>.contextMenus.onClicked behave as a regular chrome Event type.
-var ContextMenusEvent = CreateEvent('chromeWebViewInternal.onClicked');
-
-/**
- * This event is exposed as <webview>.contextMenus.onClicked.
- *
- * @constructor
- */
-function ContextMenusOnClickedEvent(opt_eventName,
-                                    opt_argSchemas,
-                                    opt_eventOptions,
-                                    opt_webViewInstanceId) {
-  var subEventName = GetUniqueSubEventName(opt_eventName);
-  EventBindings.Event.call(this, subEventName, opt_argSchemas, opt_eventOptions,
-      opt_webViewInstanceId);
-
-  // TODO(lazyboy): When do we dispose this listener?
-  ContextMenusEvent.addListener(function() {
-    // Re-dispatch to subEvent's listeners.
-    $Function.apply(this.dispatch, this, $Array.slice(arguments));
-  }.bind(this), {instanceId: opt_webViewInstanceId || 0});
-}
-
-ContextMenusOnClickedEvent.prototype = {
-  __proto__: EventBindings.Event.prototype
-};
-
-/**
- * An instance of this class is exposed as <webview>.contextMenus.
- * @constructor
- */
-function WebViewContextMenusImpl(viewInstanceId) {
-  this.viewInstanceId_ = viewInstanceId;
-};
-
-WebViewContextMenusImpl.prototype.create = function() {
-  var args = $Array.concat([this.viewInstanceId_], $Array.slice(arguments));
-  return $Function.apply(ChromeWebView.contextMenusCreate, null, args);
-};
-
-WebViewContextMenusImpl.prototype.remove = function() {
-  var args = $Array.concat([this.viewInstanceId_], $Array.slice(arguments));
-  return $Function.apply(ChromeWebView.contextMenusRemove, null, args);
-};
-
-WebViewContextMenusImpl.prototype.removeAll = function() {
-  var args = $Array.concat([this.viewInstanceId_], $Array.slice(arguments));
-  return $Function.apply(ChromeWebView.contextMenusRemoveAll, null, args);
-};
-
-WebViewContextMenusImpl.prototype.update = function() {
-  var args = $Array.concat([this.viewInstanceId_], $Array.slice(arguments));
-  return $Function.apply(ChromeWebView.contextMenusUpdate, null, args);
-};
-
-var WebViewContextMenus = utils.expose(
-    'WebViewContextMenus', WebViewContextMenusImpl,
-    { functions: ['create', 'remove', 'removeAll', 'update'] });
-
-/** @private */
-WebViewInternal.prototype.maybeHandleContextMenu = function(e, webViewEvent) {
-  var requestId = e.requestId;
-  // Construct the event.menu object.
-  var actionTaken = false;
-  var validateCall = function() {
-    var ERROR_MSG_CONTEXT_MENU_ACTION_ALREADY_TAKEN = '<webview>: ' +
-        'An action has already been taken for this "contextmenu" event.';
-
-    if (actionTaken) {
-      throw new Error(ERROR_MSG_CONTEXT_MENU_ACTION_ALREADY_TAKEN);
-    }
-    actionTaken = true;
-  };
-  var menu = {
-    show: function(items) {
-      validateCall();
-      // TODO(lazyboy): WebViewShowContextFunction doesn't do anything useful
-      // with |items|, implement.
-      ChromeWebView.showContextMenu(this.guestInstanceId, requestId, items);
-    }.bind(this)
-  };
-  webViewEvent.menu = menu;
-  var webviewNode = this.webviewNode;
-  var defaultPrevented = !webviewNode.dispatchEvent(webViewEvent);
-  if (actionTaken) {
-    return;
-  }
-  if (!defaultPrevented) {
-    actionTaken = true;
-    // The default action is equivalent to just showing the context menu as is.
-    ChromeWebView.showContextMenu(this.guestInstanceId, requestId, undefined);
-
-    // TODO(lazyboy): Figure out a way to show warning message only when
-    // listeners are registered for this event.
-  } //  else we will ignore showing the context menu completely.
-};
-
-WebViewInternal.prototype.maybeGetExperimentalEvents = function() {
-  return {};
-};
-
-/** @private */
-WebViewInternal.prototype.maybeGetExperimentalPermissions = function() {
-  return [];
-};
-
-/** @private */
-WebViewInternal.prototype.captureVisibleRegion = function(spec, callback) {
-  WebView.captureVisibleRegion(this.guestInstanceId, spec, callback);
-};
-
-WebViewInternal.maybeRegisterExperimentalAPIs = function(proto) {
-  proto.captureVisibleRegion = function(spec, callback) {
-    privates(this).internal.captureVisibleRegion(spec, callback);
-  };
-};
-
-/** @private */
-WebViewInternal.prototype.setupExperimentalContextMenus = function() {
-  var createContextMenus = function() {
-    return function() {
-      if (this.contextMenus_) {
-        return this.contextMenus_;
-      }
-
-      this.contextMenus_ = new WebViewContextMenus(this.viewInstanceId);
-
-      // Define 'onClicked' event property on |this.contextMenus_|.
-      var getOnClickedEvent = function() {
-        return function() {
-          if (!this.contextMenusOnClickedEvent_) {
-            var eventName = 'chromeWebViewInternal.onClicked';
-            // TODO(lazyboy): Find event by name instead of events[0].
-            var eventSchema = ChromeWebViewSchema.events[0];
-            var eventOptions = {supportsListeners: true};
-            var onClickedEvent = new ContextMenusOnClickedEvent(
-                eventName, eventSchema, eventOptions, this.viewInstanceId);
-            this.contextMenusOnClickedEvent_ = onClickedEvent;
-            return onClickedEvent;
-          }
-          return this.contextMenusOnClickedEvent_;
-        }.bind(this);
-      }.bind(this);
-      Object.defineProperty(
-          this.contextMenus_,
-          'onClicked',
-          {get: getOnClickedEvent(), enumerable: true});
-
-      return this.contextMenus_;
-    }.bind(this);
-  }.bind(this);
-
-  // Expose <webview>.contextMenus object.
-  Object.defineProperty(
-      this.webviewNode,
-      'contextMenus',
-      {
-        get: createContextMenus(),
-        enumerable: true
-      });
-};