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       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 nsContentTestNode_h__
       7             : #define nsContentTestNode_h__
       8             : 
       9             : #include "mozilla/Attributes.h"
      10             : #include "nscore.h"
      11             : #include "nsRuleNetwork.h"
      12             : #include "nsIAtom.h"
      13             : #include "nsIDOMDocument.h"
      14             : 
      15             : class nsXULTemplateQueryProcessorRDF;
      16             : 
      17             : /**
      18             :  * The nsContentTestNode is always the top node in a query's rule network. It
      19             :  * exists so that Constrain can filter out resources that aren't part of a
      20             :  * result.
      21             :  */
      22           0 : class nsContentTestNode : public TestNode
      23             : {
      24             : public:
      25             :     nsContentTestNode(nsXULTemplateQueryProcessorRDF* aProcessor,
      26             :                       nsIAtom* aContentVariable);
      27             : 
      28             :     virtual nsresult FilterInstantiations(InstantiationSet& aInstantiations,
      29             :                                           bool* aCantHandleYet) const override;
      30             : 
      31             :     nsresult
      32             :     Constrain(InstantiationSet& aInstantiations) override;
      33             : 
      34           0 :     void SetTag(nsIAtom* aTag, nsIDOMDocument* aDocument)
      35             :     {
      36           0 :         mTag = aTag;
      37           0 :         mDocument = aDocument;
      38           0 :     }
      39             : 
      40             : protected:
      41             :     nsXULTemplateQueryProcessorRDF *mProcessor;
      42             :     nsIDOMDocument* mDocument;
      43             :     nsCOMPtr<nsIAtom> mRefVariable;
      44             :     nsCOMPtr<nsIAtom> mTag;
      45             : };
      46             : 
      47             : #endif // nsContentTestNode_h__
      48             :