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// 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.
// This module implements chrome-specific <webview> API.
var ChromeWebView = require('chromeWebViewInternal').ChromeWebView;
var CreateEvent = require('webViewEvents').CreateEvent;
var DeclarativeWebRequestSchema =
requireNative('schema_registry').GetSchema('declarativeWebRequest');
var EventBindings = require('event_bindings');
var IdGenerator = requireNative('id_generator');
var WebRequestEvent = require('webRequestInternal').WebRequestEvent;
var WebRequestSchema =
requireNative('schema_registry').GetSchema('webRequest');
var WebViewInternal = require('webView').WebViewInternal
var WebRequestMessageEvent = CreateEvent('webViewInternal.onMessage');
var CHROME_WEB_VIEW_EVENTS = {
'contextmenu': {
evt: CreateEvent('chromeWebViewInternal.contextmenu'),
cancelable: true,
customHandler: function(handler, event, webViewEvent) {
handler.webViewInternal.maybeHandleContextMenu(event, webViewEvent);
},
fields: ['items']
}
};
function DeclarativeWebRequestEvent(opt_eventName,
opt_argSchemas,
opt_eventOptions,
opt_webViewInstanceId) {
var subEventName = opt_eventName + '/' + IdGenerator.GetNextId();
EventBindings.Event.call(this, subEventName, opt_argSchemas, opt_eventOptions,
opt_webViewInstanceId);
// TODO(lazyboy): When do we dispose this listener?
WebRequestMessageEvent.addListener(function() {
// Re-dispatch to subEvent's listeners.
$Function.apply(this.dispatch, this, $Array.slice(arguments));
}.bind(this), {instanceId: opt_webViewInstanceId || 0});
}
DeclarativeWebRequestEvent.prototype = {
__proto__: EventBindings.Event.prototype
};
/**
* Implemented when the ChromeWebView API is available.
* @private
*/
WebViewInternal.prototype.maybeGetChromeWebViewEvents = function() {
return CHROME_WEB_VIEW_EVENTS;
};
/**
* Calls to show contextmenu right away instead of dispatching a 'contextmenu'
* event.
* This will be overridden in chrome_web_view_experimental.js to implement
* contextmenu API.
*/
WebViewInternal.prototype.maybeHandleContextMenu = function(e, webViewEvent) {
var requestId = e.requestId;
// Setting |params| = undefined will show the context menu unmodified, hence
// the 'contextmenu' API is disabled for stable channel.
var params = undefined;
ChromeWebView.showContextMenu(this.guestInstanceId, requestId, params);
};
WebViewInternal.prototype.maybeSetupChromeWebViewEvents = function() {
var request = {};
var createWebRequestEvent = function(webRequestEvent) {
return function() {
if (!this[webRequestEvent.name]) {
this[webRequestEvent.name] =
new WebRequestEvent(
'webViewInternal.' + webRequestEvent.name,
webRequestEvent.parameters,
webRequestEvent.extraParameters, webRequestEvent.options,
this.viewInstanceId);
}
return this[webRequestEvent.name];
}.bind(this);
}.bind(this);
var createDeclarativeWebRequestEvent = function(webRequestEvent) {
return function() {
if (!this[webRequestEvent.name]) {
// The onMessage event gets a special event type because we want
// the listener to fire only for messages targeted for this particular
// <webview>.
var EventClass = webRequestEvent.name === 'onMessage' ?
DeclarativeWebRequestEvent : EventBindings.Event;
this[webRequestEvent.name] =
new EventClass(
'webViewInternal.' + webRequestEvent.name,
webRequestEvent.parameters,
webRequestEvent.options,
this.viewInstanceId);
}
return this[webRequestEvent.name];
}.bind(this);
}.bind(this);
for (var i = 0; i < DeclarativeWebRequestSchema.events.length; ++i) {
var eventSchema = DeclarativeWebRequestSchema.events[i];
var webRequestEvent = createDeclarativeWebRequestEvent(eventSchema);
Object.defineProperty(
request,
eventSchema.name,
{
get: webRequestEvent,
enumerable: true
}
);
}
// Populate the WebRequest events from the API definition.
for (var i = 0; i < WebRequestSchema.events.length; ++i) {
var webRequestEvent = createWebRequestEvent(WebRequestSchema.events[i]);
Object.defineProperty(
request,
WebRequestSchema.events[i].name,
{
get: webRequestEvent,
enumerable: true
}
);
}
this.setRequestPropertyOnWebViewNode(request);
};
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