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// Copyright (c) 2012 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');
// Output error message to console when using the <webview> tag with no
// permission.
var errorMessage = "You do not have permission to use the webview element." +
" Be sure to declare the 'webview' permission in your manifest file.";
// Registers <webview> custom element.
function registerWebViewElement() {
var proto = Object.create(HTMLElement.prototype);
proto.createdCallback = function() {
console.error(errorMessage);
};
window.WebView =
DocumentNatives.RegisterElement('webview', {prototype: proto});
// Delete the callbacks so developers cannot call them and produce unexpected
// behavior.
delete proto.createdCallback;
delete proto.enteredDocumentCallback;
delete proto.leftDocumentCallback;
delete proto.attributeChangedCallback;
}
var useCapture = true;
window.addEventListener('readystatechange', function listener(event) {
if (document.readyState == 'loading')
return;
registerWebViewElement();
window.removeEventListener(event.type, listener, useCapture);
}, useCapture);
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