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 nsContentTestNode_h__
michael@0: #define nsContentTestNode_h__
michael@0: 
michael@0: #include "mozilla/Attributes.h"
michael@0: #include "nscore.h"
michael@0: #include "nsRuleNetwork.h"
michael@0: #include "nsIAtom.h"
michael@0: #include "nsIDOMDocument.h"
michael@0: 
michael@0: class nsIXULTemplateBuilder;
michael@0: 
michael@0: /**
michael@0:  * The nsContentTestNode is always the top node in a query's rule network. It
michael@0:  * exists so that Constrain can filter out resources that aren't part of a
michael@0:  * result.
michael@0:  */
michael@0: class nsContentTestNode : public TestNode
michael@0: {
michael@0: public:
michael@0:     nsContentTestNode(nsXULTemplateQueryProcessorRDF* aProcessor,
michael@0:                       nsIAtom* aContentVariable);
michael@0: 
michael@0:     virtual nsresult FilterInstantiations(InstantiationSet& aInstantiations,
michael@0:                                           bool* aCantHandleYet) const MOZ_OVERRIDE;
michael@0: 
michael@0:     nsresult
michael@0:     Constrain(InstantiationSet& aInstantiations) MOZ_OVERRIDE;
michael@0: 
michael@0:     void SetTag(nsIAtom* aTag, nsIDOMDocument* aDocument)
michael@0:     {
michael@0:         mTag = aTag;
michael@0:         mDocument = aDocument;
michael@0:     }
michael@0: 
michael@0: protected:
michael@0:     nsXULTemplateQueryProcessorRDF *mProcessor;
michael@0:     nsIDOMDocument* mDocument;
michael@0:     nsCOMPtr<nsIAtom> mRefVariable;
michael@0:     nsCOMPtr<nsIAtom> mTag;
michael@0: };
michael@0: 
michael@0: #endif // nsContentTestNode_h__
michael@0: