Line data    Source code

       1             : /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
       2             : /* This Source Code Form is subject to the terms of the Mozilla Public
       3             :  * License, v. 2.0. If a copy of the MPL was not distributed with this
       4             :  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
       5             : 
       6             : #ifndef nsRDFConInstanceTestNode_h__
       7             : #define nsRDFConInstanceTestNode_h__
       8             : 
       9             : #include "mozilla/Attributes.h"
      10             : #include "nscore.h"
      11             : #include "nsRDFTestNode.h"
      12             : #include "nsIRDFResource.h"
      13             : #include "nsIRDFDataSource.h"
      14             : #include "nsXULTemplateQueryProcessorRDF.h"
      15             : 
      16             : /**
      17             :  * Rule network node that tests if a resource is an RDF container, or
      18             :  * uses multi-attributes to ``contain'' other elements.
      19             :  */
      20           0 : class nsRDFConInstanceTestNode : public nsRDFTestNode
      21             : {
      22             : public:
      23             :     enum Test { eFalse, eTrue, eDontCare };
      24             : 
      25             :     nsRDFConInstanceTestNode(TestNode* aParent,
      26             :                              nsXULTemplateQueryProcessorRDF* aProcessor,
      27             :                              nsIAtom* aContainerVariable,
      28             :                              Test aContainer,
      29             :                              Test aEmpty);
      30             : 
      31             :     virtual nsresult FilterInstantiations(InstantiationSet& aInstantiations,
      32             :                                           bool* aCantHandleYet) const override;
      33             : 
      34             :     virtual bool
      35             :     CanPropagate(nsIRDFResource* aSource,
      36             :                  nsIRDFResource* aProperty,
      37             :                  nsIRDFNode* aTarget,
      38             :                  Instantiation& aInitialBindings) const override;
      39             : 
      40             :     virtual void
      41             :     Retract(nsIRDFResource* aSource,
      42             :             nsIRDFResource* aProperty,
      43             :             nsIRDFNode* aTarget) const override;
      44             : 
      45             : 
      46             :     class Element : public MemoryElement {
      47             :     public:
      48           0 :         Element(nsIRDFResource* aContainer,
      49             :                 Test aContainerTest,
      50             :                 Test aEmptyTest)
      51           0 :             : mContainer(aContainer),
      52             :               mContainerTest(aContainerTest),
      53           0 :               mEmptyTest(aEmptyTest) {
      54           0 :             MOZ_COUNT_CTOR(nsRDFConInstanceTestNode::Element); }
      55             : 
      56           0 :         virtual ~Element() { MOZ_COUNT_DTOR(nsRDFConInstanceTestNode::Element); }
      57             : 
      58           0 :         virtual const char* Type() const override {
      59           0 :             return "nsRDFConInstanceTestNode::Element"; }
      60             : 
      61           0 :         virtual PLHashNumber Hash() const override {
      62           0 :             return mozilla::HashGeneric(mContainerTest, mEmptyTest, mContainer.get());
      63             :         }
      64             : 
      65           0 :         virtual bool Equals(const MemoryElement& aElement) const override {
      66           0 :             if (aElement.Type() == Type()) {
      67           0 :                 const Element& element = static_cast<const Element&>(aElement);
      68           0 :                 return mContainer == element.mContainer
      69           0 :                     && mContainerTest == element.mContainerTest
      70           0 :                     && mEmptyTest == element.mEmptyTest;
      71             :             }
      72           0 :             return false; }
      73             : 
      74             :     protected:
      75             :         nsCOMPtr<nsIRDFResource> mContainer;
      76             :         Test mContainerTest;
      77             :         Test mEmptyTest;
      78             :     };
      79             : 
      80             : protected:
      81             :     nsXULTemplateQueryProcessorRDF* mProcessor;
      82             :     nsCOMPtr<nsIAtom> mContainerVariable;
      83             :     Test mContainer;
      84             :     Test mEmpty;
      85             : };
      86             : 
      87             : #endif // nsRDFConInstanceTestNode_h__
      88             :