From 98d825e10d3bf76f47e69abba857a8933c8cb7d9 Mon Sep 17 00:00:00 2001
From: Caitlin Potter <caitpotter88@gmail.com>
Date: Mon, 10 Mar 2014 19:32:09 -0400
Subject: [PATCH] fix(jqLite): traverse `host` property for DocumentFragment in
 inheritedData()

If dealing with a document fragment node with a host element, and no parent, use the host
element as the parent. This enables directives within a Shadow DOM or polyfilled Shadow DOM
to lookup parent controllers.

Closes #6637
---
 src/jqLite.js      |  8 ++++++--
 test/jqLiteSpec.js | 13 +++++++++++++
 2 files changed, 19 insertions(+), 2 deletions(-)

diff --git a/src/jqLite.js b/src/jqLite.js
index ba613f218f9e..738f47a9b167 100644
--- a/src/jqLite.js
+++ b/src/jqLite.js
@@ -364,11 +364,15 @@ function jqLiteInheritedData(element, name, value) {
   var names = isArray(name) ? name : [name];
 
   while (element.length) {
-
+    var node = element[0];
     for (var i = 0, ii = names.length; i < ii; i++) {
       if ((value = element.data(names[i])) !== undefined) return value;
     }
-    element = element.parent();
+
+    // If dealing with a document fragment node with a host element, and no parent, use the host
+    // element as the parent. This enables directives within a Shadow DOM or polyfilled Shadow DOM
+    // to lookup parent controllers.
+    element = jqLite(node.parentNode || (node.nodeType === 11 && node.host));
   }
 }
 
diff --git a/test/jqLiteSpec.js b/test/jqLiteSpec.js
index 482c05f4f730..faf1c98cbb8c 100644
--- a/test/jqLiteSpec.js
+++ b/test/jqLiteSpec.js
@@ -168,6 +168,19 @@ describe('jqLite', function() {
 
       dealoc(ul);
     });
+
+    it('should pass through DocumentFragment boundaries via host', function() {
+      var host = jqLite('<div></div>'),
+          frag = document.createDocumentFragment(),
+          $frag = jqLite(frag);
+      frag.host = host[0];
+      host.data("foo", 123);
+      host.append($frag);
+      expect($frag.inheritedData("foo")).toBe(123);
+
+      dealoc(host);
+      dealoc($frag);
+    });
   });