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1 /* | |
2 * Copyright 2013 The Polymer Authors. All rights reserved. | |
3 * Use of this source code is governed by a BSD-style | |
4 * license that can be found in the LICENSE file. | |
5 */ | |
6 (function() { | |
7 var ShadowDOMPolyfill = window.ShadowDOMPolyfill; | |
8 var wrap = ShadowDOMPolyfill.wrap; | |
9 | |
10 // patch in prefixed name | |
11 Object.defineProperties(HTMLElement.prototype, { | |
12 //TODO(sjmiles): review accessor alias with Arv | |
13 webkitShadowRoot: { | |
14 get: function() { | |
15 return this.shadowRoot; | |
16 } | |
17 } | |
18 }); | |
19 | |
20 // ShadowCSS needs this: | |
21 window.wrap = window.ShadowDOMPolyfill.wrap; | |
22 window.unwrap = window.ShadowDOMPolyfill.unwrap; | |
23 | |
24 //TODO(sjmiles): review method alias with Arv | |
25 HTMLElement.prototype.webkitCreateShadowRoot = | |
26 HTMLElement.prototype.createShadowRoot; | |
27 | |
28 // TODO(jmesserly): we need to wrap document somehow (a dart:html hook?) | |
29 window.dartExperimentalFixupGetTag = function(originalGetTag) { | |
30 var NodeList = ShadowDOMPolyfill.wrappers.NodeList; | |
31 var ShadowRoot = ShadowDOMPolyfill.wrappers.ShadowRoot; | |
32 var unwrapIfNeeded = ShadowDOMPolyfill.unwrapIfNeeded; | |
33 function getTag(obj) { | |
34 // TODO(jmesserly): do we still need these? | |
35 if (obj instanceof NodeList) return 'NodeList'; | |
36 if (obj instanceof ShadowRoot) return 'ShadowRoot'; | |
37 if (window.MutationRecord && (obj instanceof MutationRecord)) | |
38 return 'MutationRecord'; | |
39 if (window.MutationObserver && (obj instanceof MutationObserver)) | |
40 return 'MutationObserver'; | |
41 | |
42 // TODO(jmesserly): this prevents incorrect interaction between ShadowDOM | |
43 // and dart:html's <template> polyfill. Essentially, ShadowDOM is | |
44 // polyfilling native template, but our Dart polyfill fails to detect this | |
45 // because the unwrapped node is an HTMLUnknownElement, leading it to | |
46 // think the node has no content. | |
47 if (obj instanceof HTMLTemplateElement) return 'HTMLTemplateElement'; | |
48 | |
49 var unwrapped = unwrapIfNeeded(obj); | |
50 if (obj !== unwrapped) { | |
51 // Fix up class names for Firefox. | |
52 // For some of them (like HTMLFormElement and HTMLInputElement), | |
53 // the "constructor" property of the unwrapped nodes points at the | |
54 // same constructor as the wrapper. | |
55 var ctor = obj.constructor | |
56 if (ctor === unwrapped.constructor) { | |
57 var name = ctor._ShadowDOMPolyfill$cacheTag_; | |
58 if (!name) { | |
59 name = Object.prototype.toString.call(unwrapped); | |
60 name = name.substring(8, name.length - 1); | |
61 ctor._ShadowDOMPolyfill$cacheTag_ = name; | |
62 } | |
63 return name; | |
64 } | |
65 | |
66 obj = unwrapped; | |
67 } | |
68 return originalGetTag(obj); | |
69 } | |
70 | |
71 return getTag; | |
72 }; | |
73 })(); | |
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