8/1 master -> stable

src/ShadowRenderer.js

@@ -106,7 +106,6 @@
   var distributedChildNodesTable = new SideTable();
   var eventParentsTable = new SideTable();
   var insertionParentTable = new SideTable();
-  var nextOlderShadowTreeTable = new SideTable();
   var rendererForHostTable = new SideTable();
   var shadowDOMRendererTable = new SideTable();
 
@@ -370,10 +369,9 @@
     },
 
     renderShadowInsertionPoint: function(visualParent, tree, shadowInsertionPoint) {
-      var nextOlderTree = getNextOlderTree(tree);
+      var nextOlderTree = tree.olderShadowRoot;
       if (nextOlderTree) {
         assignToInsertionPoint(nextOlderTree, shadowInsertionPoint);
-        shadowInsertionPoint.olderShadowRoot_ = nextOlderTree;
         this.remove(shadowInsertionPoint);
         var shadowDOMChildNodes = getChildNodesSnapshot(nextOlderTree);
         shadowDOMChildNodes.forEach(function(node) {
@@ -421,7 +419,7 @@
 
         pool = distribute(tree, pool);  // 4.2.
         if (point) {  // 4.3.
-          var nextOlderTree = getNextOlderTree(tree);  // 4.3.1.
+          var nextOlderTree = tree.olderShadowRoot;  // 4.3.1.
           if (!nextOlderTree) {
             break;  // 4.3.1.1.
           } else {
@@ -480,19 +478,10 @@
     return !!shadowHost.shadowRoot;
   }
 
-  /**
-   * @param {WrapperShadowRoot} tree
-   */
-  function getNextOlderTree(tree) {
-    return nextOlderShadowTreeTable.get(tree);
-  }
-
   function getShadowTrees(host) {
     var trees = [];
 
-    for (var tree = host.shadowRoot;
-         tree;
-         tree = nextOlderShadowTreeTable.get(tree)) {
+    for (var tree = host.shadowRoot; tree; tree = tree.olderShadowRoot) {
       trees.push(tree);
     }
     return trees;
@@ -535,9 +524,8 @@
   scope.eventParentsTable = eventParentsTable;
   scope.getRendererForHost = getRendererForHost;
   scope.getShadowTrees = getShadowTrees;
-  scope.nextOlderShadowTreeTable = nextOlderShadowTreeTable;
-  scope.renderAllPending = renderAllPending;
   scope.insertionParentTable = insertionParentTable;
+  scope.renderAllPending = renderAllPending;
 
   // Exposed for testing
   scope.visual = {

src/wrappers/Document.js

@@ -68,7 +68,7 @@
   }
 
   function adoptOlderShadowRoots(shadowRoot, doc) {
-    var oldShadowRoot = scope.nextOlderShadowTreeTable.get(shadowRoot);
+    var oldShadowRoot = shadowRoot.olderShadowRoot;
     if (oldShadowRoot)
       doc.adoptNode(oldShadowRoot);
   }

src/wrappers/HTMLShadowElement.js

@@ -13,14 +13,9 @@
 
   function HTMLShadowElement(node) {
     HTMLElement.call(this, node);
-    this.olderShadowRoot_ = null;
   }
   HTMLShadowElement.prototype = Object.create(HTMLElement.prototype);
   mixin(HTMLShadowElement.prototype, {
-    get olderShadowRoot() {
-      return this.olderShadowRoot_;
-    },
-
     invalidateShadowRenderer: function() {
       HTMLElement.prototype.invalidateShadowRenderer.call(this, true);
     },
@@ -32,4 +27,4 @@
     registerWrapper(OriginalHTMLShadowElement, HTMLShadowElement);
 
   scope.wrappers.HTMLShadowElement = HTMLShadowElement;
-})(this.ShadowDOMPolyfill);
+})(this.ShadowDOMPolyfill);

src/wrappers/ShadowRoot.js

@@ -14,6 +14,7 @@
   var unwrap = scope.unwrap;
 
   var shadowHostTable = new SideTable();
+  var nextOlderShadowTreeTable = new SideTable();
 
   function ShadowRoot(hostWrapper) {
     var node = unwrap(hostWrapper.impl.ownerDocument.createDocumentFragment());
@@ -24,7 +25,7 @@
     rewrap(node, this);
 
     var oldShadowRoot = hostWrapper.shadowRoot;
-    scope.nextOlderShadowTreeTable.set(this, oldShadowRoot);
+    nextOlderShadowTreeTable.set(this, oldShadowRoot);
 
     shadowHostTable.set(this, hostWrapper);
   }
@@ -38,6 +39,10 @@
       this.invalidateShadowRenderer();
     },
 
+    get olderShadowRoot() {
+      return nextOlderShadowTreeTable.get(this) || null;
+    },
+
     invalidateShadowRenderer: function() {
       return shadowHostTable.get(this).invalidateShadowRenderer();
     },

src/wrappers/node-interfaces.js

@@ -59,7 +59,7 @@
     },
 
     get previousElementSibling() {
-      return backwardsElement(this.nextSibling);
+      return backwardsElement(this.previousSibling);
     }
   };
 

test/js/ChildNodeInterface.js

@@ -0,0 +1,54 @@
+/*
+ * Copyright 2013 The Polymer Authors. All rights reserved.
+ * Use of this source code is goverened by a BSD-style
+ * license that can be found in the LICENSE file.
+ */
+
+suite('ChildNodeInterface', function() {
+
+  function getTree() {
+    var tree = {};
+    var div = tree.div = document.createElement('div');
+    div.innerHTML = 'a<b></b>c<d></d>e';
+    var a = tree.a = div.firstChild;
+    var b = tree.b = a.nextSibling;
+    var c = tree.c = b.nextSibling;
+    var d = tree.d = c.nextSibling;
+    var e = tree.e = d.nextSibling;
+
+    var sr = tree.sr = div.createShadowRoot();
+    sr.innerHTML = 'f<g></g>h<content></content>i<j></j>k';
+    var f = tree.f = sr.firstChild;
+    var g = tree.g = f.nextSibling;
+    var h = tree.h = g.nextSibling;
+    var content = tree.content = h.nextSibling;
+    var i = tree.i = content.nextSibling;
+    var j = tree.j = i.nextSibling;
+    var k = tree.k = j.nextSibling;
+
+    div.offsetHeight;  // trigger rendering
+
+    return tree;
+  }
+
+  test('nextElementSibling', function() {
+    var tree = getTree();
+
+    assert.equal(tree.b.nextElementSibling, tree.d);
+    assert.equal(tree.d.nextElementSibling, null);
+    assert.equal(tree.g.nextElementSibling, tree.content);
+    assert.equal(tree.content.nextElementSibling, tree.j);
+    assert.equal(tree.j.nextElementSibling, null);
+  });
+
+  test('previousElementSibling', function() {
+    var tree = getTree();
+
+    assert.equal(tree.b.previousElementSibling, null);
+    assert.equal(tree.d.previousElementSibling, tree.b);
+    assert.equal(tree.g.previousElementSibling, null);
+    assert.equal(tree.content.previousElementSibling, tree.g);
+    assert.equal(tree.j.previousElementSibling, tree.content);
+  });
+
+});

test/js/HTMLShadowElement.js

@@ -8,7 +8,7 @@ suite('HTMLShadowElement', function() {
 
   var unwrap = ShadowDOMPolyfill.unwrap;
 
-  test('olderShadowRoot', function() {
+  test('instanceof HTMLShadowElement', function() {
     var host = document.createElement('div');
     host.innerHTML = '<a>a</a><b>b</b>';
     var a = host.firstChild;
@@ -20,18 +20,15 @@ suite('HTMLShadowElement', function() {
 
     host.offsetWidth;
     assert.isTrue(shadow instanceof HTMLShadowElement);
-    assert.isNull(shadow.olderShadowRoot);
 
     var sr2 = host.createShadowRoot();
     sr2.innerHTML = 'd<shadow>e</shadow>f';
     var shadow2 = sr2.firstElementChild;
 
     host.offsetWidth;
     assert.isTrue(shadow instanceof HTMLShadowElement);
-    assert.isNull(shadow.olderShadowRoot);
 
     assert.isTrue(shadow2 instanceof HTMLShadowElement);
-    assert.equal(shadow2.olderShadowRoot, sr);
 
     assert.equal(unwrap(host).innerHTML, 'dabcf');
   });

test/js/ShadowRoot.js

@@ -37,4 +37,23 @@ suite('ShadowRoot', function() {
     assert.equal(sr.getElementById('b'), b);
   });
 
+  test('olderShadowRoot', function() {
+    var host = document.createElement('div');
+    host.innerHTML = '<a>a</a><b>b</b>';
+    var a = host.firstChild;
+    var b = host.lastChild;
+
+    var sr = host.createShadowRoot();
+    sr.innerHTML = 'a';
+
+    host.offsetWidth;
+    assert.isNull(sr.olderShadowRoot);
+
+    var sr2 = host.createShadowRoot();
+    sr2.innerHTML = 'b';
+
+    host.offsetWidth;
+    assert.equal(sr2.olderShadowRoot, sr);
+  });
+
 });

test/test.main.js

@@ -50,6 +50,7 @@ mocha.setup({
 })
 
 var modules = [
+  'ChildNodeInterface.js',
   'Comment.js',
   'Document.js',
   'Element.js',