diff -r 000000000000 -r 6474c204b198 dom/xbl/XBLChildrenElement.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/dom/xbl/XBLChildrenElement.h	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,182 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=2 sw=2 et tw=79: */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#ifndef nsXBLChildrenElement_h___
+#define nsXBLChildrenElement_h___
+
+#include "nsIDOMElement.h"
+#include "nsINodeList.h"
+#include "nsBindingManager.h"
+#include "mozilla/dom/nsXMLElement.h"
+
+class nsAnonymousContentList;
+
+namespace mozilla {
+namespace dom {
+
+class ExplicitChildIterator;
+
+class XBLChildrenElement : public nsXMLElement
+{
+public:
+  friend class mozilla::dom::ExplicitChildIterator;
+  friend class nsAnonymousContentList;
+  XBLChildrenElement(already_AddRefed<nsINodeInfo>& aNodeInfo)
+    : nsXMLElement(aNodeInfo)
+  {
+  }
+  XBLChildrenElement(already_AddRefed<nsINodeInfo>&& aNodeInfo)
+    : nsXMLElement(aNodeInfo)
+  {
+  }
+  ~XBLChildrenElement();
+
+  // nsISupports
+  NS_DECL_ISUPPORTS_INHERITED
+
+  // nsINode interface methods
+  virtual nsresult Clone(nsINodeInfo *aNodeInfo, nsINode **aResult) const;
+
+  virtual nsXPCClassInfo* GetClassInfo() { return nullptr; }
+
+  virtual nsIDOMNode* AsDOMNode() { return this; }
+
+  // nsIContent interface methods
+  virtual nsIAtom *GetIDAttributeName() const;
+  virtual nsIAtom* DoGetID() const;
+  virtual nsresult UnsetAttr(int32_t aNameSpaceID, nsIAtom* aAttribute,
+                             bool aNotify);
+  virtual bool ParseAttribute(int32_t aNamespaceID,
+                              nsIAtom* aAttribute,
+                              const nsAString& aValue,
+                              nsAttrValue& aResult);
+
+  void AppendInsertedChild(nsIContent* aChild)
+  {
+    mInsertedChildren.AppendElement(aChild);
+    aChild->SetXBLInsertionParent(GetParent());
+  }
+
+  void InsertInsertedChildAt(nsIContent* aChild, uint32_t aIndex)
+  {
+    mInsertedChildren.InsertElementAt(aIndex, aChild);
+    aChild->SetXBLInsertionParent(GetParent());
+  }
+
+  void RemoveInsertedChild(nsIContent* aChild)
+  {
+    // Can't use this assertion as we cheat for dynamic insertions and
+    // only insert in the innermost insertion point.
+    //NS_ASSERTION(mInsertedChildren.Contains(aChild),
+    //             "Removing child that's not there");
+    mInsertedChildren.RemoveElement(aChild);
+  }
+
+  void ClearInsertedChildren()
+  {
+    for (uint32_t c = 0; c < mInsertedChildren.Length(); ++c) {
+      mInsertedChildren[c]->SetXBLInsertionParent(nullptr);
+    }
+    mInsertedChildren.Clear();
+  }
+
+  void MaybeSetupDefaultContent()
+  {
+    if (!HasInsertedChildren()) {
+      for (nsIContent* child = static_cast<nsINode*>(this)->GetFirstChild();
+           child;
+           child = child->GetNextSibling()) {
+        child->SetXBLInsertionParent(GetParent());
+      }
+    }
+  }
+
+  void MaybeRemoveDefaultContent()
+  {
+    if (!HasInsertedChildren()) {
+      for (nsIContent* child = static_cast<nsINode*>(this)->GetFirstChild();
+           child;
+           child = child->GetNextSibling()) {
+        child->SetXBLInsertionParent(nullptr);
+      }
+    }
+  }
+
+  uint32_t InsertedChildrenLength()
+  {
+    return mInsertedChildren.Length();
+  }
+
+  bool HasInsertedChildren()
+  {
+    return !mInsertedChildren.IsEmpty();
+  }
+
+  enum {
+    NoIndex = uint32_t(-1)
+  };
+  uint32_t IndexOfInsertedChild(nsIContent* aChild)
+  {
+    return mInsertedChildren.IndexOf(aChild);
+  }
+
+  bool Includes(nsIContent* aChild)
+  {
+    NS_ASSERTION(!mIncludes.IsEmpty(),
+                 "Shouldn't check for includes on default insertion point");
+    return mIncludes.Contains(aChild->Tag());
+  }
+
+  bool IsDefaultInsertion()
+  {
+    return mIncludes.IsEmpty();
+  }
+
+  nsTArray<nsIContent*> mInsertedChildren;
+
+private:
+  nsTArray<nsCOMPtr<nsIAtom> > mIncludes;
+};
+
+} // namespace dom
+} // namespace mozilla
+
+class nsAnonymousContentList : public nsINodeList
+{
+public:
+  nsAnonymousContentList(nsIContent* aParent)
+    : mParent(aParent)
+  {
+    MOZ_COUNT_CTOR(nsAnonymousContentList);
+    SetIsDOMBinding();
+  }
+
+  virtual ~nsAnonymousContentList()
+  {
+    MOZ_COUNT_DTOR(nsAnonymousContentList);
+  }
+
+  NS_DECL_CYCLE_COLLECTING_ISUPPORTS
+  NS_DECL_CYCLE_COLLECTION_SCRIPT_HOLDER_CLASS(nsAnonymousContentList)
+  // nsIDOMNodeList interface
+  NS_DECL_NSIDOMNODELIST
+
+  // nsINodeList interface
+  virtual int32_t IndexOf(nsIContent* aContent);
+  virtual nsINode* GetParentObject() { return mParent; }
+  virtual nsIContent* Item(uint32_t aIndex);
+
+  virtual JSObject* WrapObject(JSContext *cx) MOZ_OVERRIDE;
+
+  bool IsListFor(nsIContent* aContent) {
+    return mParent == aContent;
+  }
+
+private:
+  nsCOMPtr<nsIContent> mParent;
+};
+
+#endif // nsXBLChildrenElement_h___