Index: runtime/bin/vmservice/observatory/deployed/web/packages/web_components/dart_support.js |
diff --git a/runtime/bin/vmservice/observatory/deployed/web/packages/web_components/dart_support.js b/runtime/bin/vmservice/observatory/deployed/web/packages/web_components/dart_support.js |
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index 0000000000000000000000000000000000000000..3f712ef6019755bda7052d0f16c62423cebec98f |
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+++ b/runtime/bin/vmservice/observatory/deployed/web/packages/web_components/dart_support.js |
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+// Copyright (c) 2014, the Dart project authors. Please see the AUTHORS file |
+// for details. All rights reserved. Use of this source code is governed by a |
+// BSD-style license that can be found in the LICENSE file. |
+ |
+// Teaches dart2js about the wrapping that is done by the Shadow DOM polyfill. |
+(function() { |
+ var ShadowDOMPolyfill = window.ShadowDOMPolyfill; |
+ if (!ShadowDOMPolyfill) return; |
+ |
+ // TODO(sigmund): remove the userAgent check once 1.6 rolls as stable. |
+ // See: dartbug.com/18463 |
+ if (navigator.dartEnabled || (navigator.userAgent.indexOf('(Dart)') !== -1)) { |
+ console.error("ShadowDOMPolyfill polyfill was loaded in Dartium. This " + |
+ "will not work. This indicates that Dartium's Chrome version is " + |
+ "not compatible with this version of web_components."); |
+ } |
+ |
+ var needsConstructorFix = window.constructor === window.Window; |
+ |
+ // TODO(jmesserly): we need to wrap document somehow (a dart:html hook?) |
+ |
+ // dartNativeDispatchHooksTransformer is described on initHooks() in |
+ // sdk/lib/_internal/lib/native_helper.dart. |
+ if (typeof window.dartNativeDispatchHooksTransformer == 'undefined') |
+ window.dartNativeDispatchHooksTransformer = []; |
+ |
+ window.dartNativeDispatchHooksTransformer.push(function(hooks) { |
+ var NodeList = ShadowDOMPolyfill.wrappers.NodeList; |
+ var ShadowRoot = ShadowDOMPolyfill.wrappers.ShadowRoot; |
+ var unwrapIfNeeded = ShadowDOMPolyfill.unwrapIfNeeded; |
+ var originalGetTag = hooks.getTag; |
+ hooks.getTag = function getTag(obj) { |
+ // TODO(jmesserly): do we still need these? |
+ if (obj instanceof NodeList) return 'NodeList'; |
+ if (obj instanceof ShadowRoot) return 'ShadowRoot'; |
+ if (MutationRecord && (obj instanceof MutationRecord)) |
+ return 'MutationRecord'; |
+ if (MutationObserver && (obj instanceof MutationObserver)) |
+ return 'MutationObserver'; |
+ |
+ // TODO(jmesserly): this prevents incorrect interaction between ShadowDOM |
+ // and dart:html's <template> polyfill. Essentially, ShadowDOM is |
+ // polyfilling native template, but our Dart polyfill fails to detect this |
+ // because the unwrapped node is an HTMLUnknownElement, leading it to |
+ // think the node has no content. |
+ if (obj instanceof HTMLTemplateElement) return 'HTMLTemplateElement'; |
+ |
+ var unwrapped = unwrapIfNeeded(obj); |
+ if (unwrapped && (needsConstructorFix || obj !== unwrapped)) { |
+ // Fix up class names for Firefox, or if using the minified polyfill. |
+ // dart2js prefers .constructor.name, but there are all kinds of cases |
+ // where this will give the wrong answer. |
+ var ctor = obj.constructor |
+ if (ctor === unwrapped.constructor) { |
+ var name = ctor._ShadowDOMPolyfill$cacheTag_; |
+ if (!name) { |
+ name = originalGetTag(unwrapped); |
+ ctor._ShadowDOMPolyfill$cacheTag_ = name; |
+ } |
+ return name; |
+ } |
+ |
+ obj = unwrapped; |
+ } |
+ return originalGetTag(obj); |
+ } |
+ }); |
+})(); |