jmesserly@google.com
b218f342fd
* let polymer.js register polymer-element * let polymer.js bootstrap for polymer.dart * hook polymer-element's register, if it's a Dart class go down the Dart code path building polymer.concat.js (debug only) requires https://github.com/Polymer/polymer-dev/pull/9 R=sigmund@google.com Review URL: https://codereview.chromium.org//182193002 git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge/dart@33398 260f80e4-7a28-3924-810f-c04153c831b5
62 lines
2.5 KiB
JavaScript
62 lines
2.5 KiB
JavaScript
// Copyright (c) 2014, the Dart project authors. Please see the AUTHORS file
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// for details. All rights reserved. Use of this source code is governed by a
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// BSD-style license that can be found in the LICENSE file.
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(function() {
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var ShadowDOMPolyfill = window.ShadowDOMPolyfill;
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if (!ShadowDOMPolyfill) return;
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if (navigator.userAgent.indexOf('(Dart)') !== -1) {
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console.error("ShadowDOMPolyfill polyfill was loaded in Dartium. This " +
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"will not work. This indicates that Dartium's Chrome version is " +
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"not compatible with this version of web_components.");
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}
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var needsConstructorFix = window.constructor === window.Window;
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// TODO(jmesserly): we need to wrap document somehow (a dart:html hook?)
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window.dartExperimentalFixupGetTag = function(originalGetTag) {
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var NodeList = ShadowDOMPolyfill.wrappers.NodeList;
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var ShadowRoot = ShadowDOMPolyfill.wrappers.ShadowRoot;
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var unwrapIfNeeded = ShadowDOMPolyfill.unwrapIfNeeded;
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function getTag(obj) {
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// TODO(jmesserly): do we still need these?
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if (obj instanceof NodeList) return 'NodeList';
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if (obj instanceof ShadowRoot) return 'ShadowRoot';
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if (MutationRecord && (obj instanceof MutationRecord))
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return 'MutationRecord';
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if (MutationObserver && (obj instanceof MutationObserver))
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return 'MutationObserver';
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// TODO(jmesserly): this prevents incorrect interaction between ShadowDOM
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// and dart:html's <template> polyfill. Essentially, ShadowDOM is
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// polyfilling native template, but our Dart polyfill fails to detect this
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// because the unwrapped node is an HTMLUnknownElement, leading it to
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// think the node has no content.
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if (obj instanceof HTMLTemplateElement) return 'HTMLTemplateElement';
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var unwrapped = unwrapIfNeeded(obj);
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if (unwrapped && (needsConstructorFix || obj !== unwrapped)) {
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// Fix up class names for Firefox, or if using the minified polyfill.
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// dart2js prefers .constructor.name, but there are all kinds of cases
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// where this will give the wrong answer.
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var ctor = obj.constructor
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if (ctor === unwrapped.constructor) {
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var name = ctor._ShadowDOMPolyfill$cacheTag_;
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if (!name) {
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name = Object.prototype.toString.call(unwrapped);
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name = name.substring(8, name.length - 1);
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ctor._ShadowDOMPolyfill$cacheTag_ = name;
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}
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return name;
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}
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obj = unwrapped;
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}
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return originalGetTag(obj);
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}
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return getTag;
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};
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})();
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