diff -r 000000000000 -r 6474c204b198 content/xul/templates/src/nsRDFConMemberTestNode.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/content/xul/templates/src/nsRDFConMemberTestNode.h	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,77 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/* 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 nsRDFConMemberTestNode_h__
+#define nsRDFConMemberTestNode_h__
+
+#include "mozilla/Attributes.h"
+#include "nscore.h"
+#include "nsRDFTestNode.h"
+#include "nsIRDFDataSource.h"
+#include "nsXULTemplateQueryProcessorRDF.h"
+
+/**
+ * Rule network node that test if a resource is a member of an RDF
+ * container, or is ``contained'' by another resource that refers to
+ * it using a ``containment'' attribute.
+ */
+class nsRDFConMemberTestNode : public nsRDFTestNode
+{
+public:
+    nsRDFConMemberTestNode(TestNode* aParent,
+                           nsXULTemplateQueryProcessorRDF* aProcessor,
+                           nsIAtom* aContainerVariable,
+                           nsIAtom* aMemberVariable);
+
+    virtual nsresult FilterInstantiations(InstantiationSet& aInstantiations,
+                                          bool* aCantHandleYet) const MOZ_OVERRIDE;
+
+    virtual bool
+    CanPropagate(nsIRDFResource* aSource,
+                 nsIRDFResource* aProperty,
+                 nsIRDFNode* aTarget,
+                 Instantiation& aInitialBindings) const MOZ_OVERRIDE;
+
+    virtual void
+    Retract(nsIRDFResource* aSource,
+            nsIRDFResource* aProperty,
+            nsIRDFNode* aTarget) const MOZ_OVERRIDE;
+
+    class Element : public MemoryElement {
+    public:
+        Element(nsIRDFResource* aContainer,
+                nsIRDFNode* aMember)
+            : mContainer(aContainer),
+              mMember(aMember) {
+            MOZ_COUNT_CTOR(nsRDFConMemberTestNode::Element); }
+
+        virtual ~Element() { MOZ_COUNT_DTOR(nsRDFConMemberTestNode::Element); }
+
+        virtual const char* Type() const MOZ_OVERRIDE {
+            return "nsRDFConMemberTestNode::Element"; }
+
+        virtual PLHashNumber Hash() const MOZ_OVERRIDE {
+            return PLHashNumber(NS_PTR_TO_INT32(mContainer.get())) ^
+                (PLHashNumber(NS_PTR_TO_INT32(mMember.get())) >> 12); }
+
+        virtual bool Equals(const MemoryElement& aElement) const MOZ_OVERRIDE {
+            if (aElement.Type() == Type()) {
+                const Element& element = static_cast<const Element&>(aElement);
+                return mContainer == element.mContainer && mMember == element.mMember;
+            }
+            return false; }
+
+    protected:
+        nsCOMPtr<nsIRDFResource> mContainer;
+        nsCOMPtr<nsIRDFNode> mMember;
+    };
+
+protected:
+    nsXULTemplateQueryProcessorRDF* mProcessor;
+    nsCOMPtr<nsIAtom> mContainerVariable;
+    nsCOMPtr<nsIAtom> mMemberVariable;
+};
+
+#endif // nsRDFConMemberTestNode_h__