89 lines
2.9 KiB
C++
89 lines
2.9 KiB
C++
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#ifndef nsRDFConInstanceTestNode_h__
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#define nsRDFConInstanceTestNode_h__
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#include "mozilla/Attributes.h"
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#include "nscore.h"
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#include "nsRDFTestNode.h"
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#include "nsIRDFResource.h"
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#include "nsIRDFDataSource.h"
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#include "nsXULTemplateQueryProcessorRDF.h"
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/**
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* Rule network node that tests if a resource is an RDF container, or
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* uses multi-attributes to ``contain'' other elements.
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*/
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class nsRDFConInstanceTestNode : public nsRDFTestNode
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{
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public:
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enum Test { eFalse, eTrue, eDontCare };
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nsRDFConInstanceTestNode(TestNode* aParent,
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nsXULTemplateQueryProcessorRDF* aProcessor,
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nsIAtom* aContainerVariable,
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Test aContainer,
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Test aEmpty);
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virtual nsresult FilterInstantiations(InstantiationSet& aInstantiations,
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bool* aCantHandleYet) const override;
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virtual bool
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CanPropagate(nsIRDFResource* aSource,
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nsIRDFResource* aProperty,
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nsIRDFNode* aTarget,
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Instantiation& aInitialBindings) const override;
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virtual void
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Retract(nsIRDFResource* aSource,
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nsIRDFResource* aProperty,
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nsIRDFNode* aTarget) const override;
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class Element : public MemoryElement {
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public:
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Element(nsIRDFResource* aContainer,
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Test aContainerTest,
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Test aEmptyTest)
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: mContainer(aContainer),
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mContainerTest(aContainerTest),
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mEmptyTest(aEmptyTest) {
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MOZ_COUNT_CTOR(nsRDFConInstanceTestNode::Element); }
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virtual ~Element() { MOZ_COUNT_DTOR(nsRDFConInstanceTestNode::Element); }
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virtual const char* Type() const override {
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return "nsRDFConInstanceTestNode::Element"; }
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virtual PLHashNumber Hash() const override {
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return mozilla::HashGeneric(mContainerTest, mEmptyTest, mContainer.get());
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}
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virtual bool Equals(const MemoryElement& aElement) const override {
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if (aElement.Type() == Type()) {
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const Element& element = static_cast<const Element&>(aElement);
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return mContainer == element.mContainer
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&& mContainerTest == element.mContainerTest
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&& mEmptyTest == element.mEmptyTest;
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}
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return false; }
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protected:
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nsCOMPtr<nsIRDFResource> mContainer;
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Test mContainerTest;
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Test mEmptyTest;
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};
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protected:
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nsXULTemplateQueryProcessorRDF* mProcessor;
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nsCOMPtr<nsIAtom> mContainerVariable;
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Test mContainer;
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Test mEmpty;
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};
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#endif // nsRDFConInstanceTestNode_h__
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