michael@0: /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
michael@0: /* This Source Code Form is subject to the terms of the Mozilla Public
michael@0:  * License, v. 2.0. If a copy of the MPL was not distributed with this
michael@0:  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
michael@0: 
michael@0: #ifndef nsRDFConMemberTestNode_h__
michael@0: #define nsRDFConMemberTestNode_h__
michael@0: 
michael@0: #include "mozilla/Attributes.h"
michael@0: #include "nscore.h"
michael@0: #include "nsRDFTestNode.h"
michael@0: #include "nsIRDFDataSource.h"
michael@0: #include "nsXULTemplateQueryProcessorRDF.h"
michael@0: 
michael@0: /**
michael@0:  * Rule network node that test if a resource is a member of an RDF
michael@0:  * container, or is ``contained'' by another resource that refers to
michael@0:  * it using a ``containment'' attribute.
michael@0:  */
michael@0: class nsRDFConMemberTestNode : public nsRDFTestNode
michael@0: {
michael@0: public:
michael@0:     nsRDFConMemberTestNode(TestNode* aParent,
michael@0:                            nsXULTemplateQueryProcessorRDF* aProcessor,
michael@0:                            nsIAtom* aContainerVariable,
michael@0:                            nsIAtom* aMemberVariable);
michael@0: 
michael@0:     virtual nsresult FilterInstantiations(InstantiationSet& aInstantiations,
michael@0:                                           bool* aCantHandleYet) const MOZ_OVERRIDE;
michael@0: 
michael@0:     virtual bool
michael@0:     CanPropagate(nsIRDFResource* aSource,
michael@0:                  nsIRDFResource* aProperty,
michael@0:                  nsIRDFNode* aTarget,
michael@0:                  Instantiation& aInitialBindings) const MOZ_OVERRIDE;
michael@0: 
michael@0:     virtual void
michael@0:     Retract(nsIRDFResource* aSource,
michael@0:             nsIRDFResource* aProperty,
michael@0:             nsIRDFNode* aTarget) const MOZ_OVERRIDE;
michael@0: 
michael@0:     class Element : public MemoryElement {
michael@0:     public:
michael@0:         Element(nsIRDFResource* aContainer,
michael@0:                 nsIRDFNode* aMember)
michael@0:             : mContainer(aContainer),
michael@0:               mMember(aMember) {
michael@0:             MOZ_COUNT_CTOR(nsRDFConMemberTestNode::Element); }
michael@0: 
michael@0:         virtual ~Element() { MOZ_COUNT_DTOR(nsRDFConMemberTestNode::Element); }
michael@0: 
michael@0:         virtual const char* Type() const MOZ_OVERRIDE {
michael@0:             return "nsRDFConMemberTestNode::Element"; }
michael@0: 
michael@0:         virtual PLHashNumber Hash() const MOZ_OVERRIDE {
michael@0:             return PLHashNumber(NS_PTR_TO_INT32(mContainer.get())) ^
michael@0:                 (PLHashNumber(NS_PTR_TO_INT32(mMember.get())) >> 12); }
michael@0: 
michael@0:         virtual bool Equals(const MemoryElement& aElement) const MOZ_OVERRIDE {
michael@0:             if (aElement.Type() == Type()) {
michael@0:                 const Element& element = static_cast<const Element&>(aElement);
michael@0:                 return mContainer == element.mContainer && mMember == element.mMember;
michael@0:             }
michael@0:             return false; }
michael@0: 
michael@0:     protected:
michael@0:         nsCOMPtr<nsIRDFResource> mContainer;
michael@0:         nsCOMPtr<nsIRDFNode> mMember;
michael@0:     };
michael@0: 
michael@0: protected:
michael@0:     nsXULTemplateQueryProcessorRDF* mProcessor;
michael@0:     nsCOMPtr<nsIAtom> mContainerVariable;
michael@0:     nsCOMPtr<nsIAtom> mMemberVariable;
michael@0: };
michael@0: 
michael@0: #endif // nsRDFConMemberTestNode_h__