Identify the name of the prototype extended by out-of-app custom elements
BUG=
R=sigmund@google.com
Review URL: https://codereview.chromium.org//329723002
git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge/dart/pkg/web_components@37247 260f80e4-7a28-3924-810f-c04153c831b5
diff --git a/lib/dart_support.js b/lib/dart_support.js
index 4e1995a..77948eb 100644
--- a/lib/dart_support.js
+++ b/lib/dart_support.js
@@ -116,6 +116,33 @@
upgraders[name] = upgrader;
}
+
+ // Native custom elements outside the app in Chrome have constructor
+ // names like "x-tag", which need to be translated to the DOM
+ // element they extend. When using the shadow dom polyfill this is
+ // take care of above.
+ var ShadowDOMPolyfill = window.ShadowDOMPolyfill;
+ if (!ShadowDOMPolyfill) {
+ // 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 originalGetUnknownTag = hooks.getUnknownTag;
+ hooks.getUnknownTag = function(o, tag) {
+ if (/-/.test(tag)) { // "x-tag"
+ var s = Object.prototype.toString.call(o);
+ var match = s.match(/^\[object ([A-Za-z]*Element)\]$/);
+ if (match) {
+ return match[1];
+ }
+ return originalGetUnknownTag(o, tag);
+ }
+ };
+ });
+ }
+
doc._registerDartTypeUpgrader = registerDartTypeUpgrader;
doc.registerElement = registerElement;
})(document);
