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nsTreeRowTestNode.h
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00001 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
00002 /* ***** BEGIN LICENSE BLOCK *****
00003  * Version: MPL 1.1/GPL 2.0/LGPL 2.1
00004  *
00005  * The contents of this file are subject to the Mozilla Public License Version
00006  * 1.1 (the "License"); you may not use this file except in compliance with
00007  * the License. You may obtain a copy of the License at
00008  * http://www.mozilla.org/MPL/
00009  *
00010  * Software distributed under the License is distributed on an "AS IS" basis,
00011  * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
00012  * for the specific language governing rights and limitations under the
00013  * License.
00014  *
00015  * The Original Code is Mozilla Communicator client code.
00016  *
00017  * The Initial Developer of the Original Code is
00018  * Netscape Communications Corporation.
00019  * Portions created by the Initial Developer are Copyright (C) 1998
00020  * the Initial Developer. All Rights Reserved.
00021  *
00022  * Contributor(s):
00023  *   Chris Waterson <waterson@netscape.com>
00024  *
00025  * Alternatively, the contents of this file may be used under the terms of
00026  * either of the GNU General Public License Version 2 or later (the "GPL"),
00027  * or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
00028  * in which case the provisions of the GPL or the LGPL are applicable instead
00029  * of those above. If you wish to allow use of your version of this file only
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00031  * use your version of this file under the terms of the MPL, indicate your
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00033  * and other provisions required by the GPL or the LGPL. If you do not delete
00034  * the provisions above, a recipient may use your version of this file under
00035  * the terms of any one of the MPL, the GPL or the LGPL.
00036  *
00037  * ***** END LICENSE BLOCK ***** */
00038 
00039 #ifndef nsTreeRowTestNode_h__
00040 #define nsTreeRowTestNode_h__
00041 
00042 #include "nscore.h"
00043 #include "nsFixedSizeAllocator.h"
00044 #include "nsRuleNetwork.h"
00045 #include "nsIRDFResource.h"
00046 class nsConflictSet;
00047 class nsTreeRows;
00048 
00049 class nsTreeRowTestNode : public TestNode
00050 {
00051 public:
00052     enum { kRoot = -1 };
00053 
00054     nsTreeRowTestNode(InnerNode* aParent,
00055                           nsConflictSet& aConflictSet,
00056                           nsTreeRows& aRows,
00057                           PRInt32 aIdVariable);
00058 
00059     virtual nsresult
00060     FilterInstantiations(InstantiationSet& aInstantiations, void* aClosure) const;
00061 
00062     virtual nsresult
00063     GetAncestorVariables(VariableSet& aVariables) const;
00064 
00065     class Element : public MemoryElement {
00066     protected:
00067         // Hide so that only Create() and Destroy() can be used to
00068         // allocate and deallocate from the heap
00069         static void* operator new(size_t) CPP_THROW_NEW { return 0; }
00070         static void operator delete(void*, size_t) { }
00071 
00072     public:
00073         Element(nsIRDFResource* aResource)
00074             : mResource(aResource) {
00075             MOZ_COUNT_CTOR(nsTreeRowTestNode::Element); }
00076 
00077         virtual ~Element() { MOZ_COUNT_DTOR(nsTreeRowTestNode::Element); }
00078 
00079         static Element*
00080         Create(nsFixedSizeAllocator& aPool, nsIRDFResource* aResource) {
00081             void* place = aPool.Alloc(sizeof(Element));
00082             return place ? ::new (place) Element(aResource) : nsnull; }
00083 
00084         static void
00085         Destroy(nsFixedSizeAllocator& aPool, Element* aElement) {
00086             aElement->~Element();
00087             aPool.Free(aElement, sizeof(*aElement)); }
00088 
00089         virtual const char* Type() const {
00090             return "nsTreeRowTestNode::Element"; }
00091 
00092         virtual PLHashNumber Hash() const {
00093             return PLHashNumber(NS_PTR_TO_INT32(mResource.get())) >> 2; }
00094 
00095         virtual PRBool Equals(const MemoryElement& aElement) const {
00096             if (aElement.Type() == Type()) {
00097                 const Element& element = NS_STATIC_CAST(const Element&, aElement);
00098                 return mResource == element.mResource;
00099             }
00100             return PR_FALSE; }
00101 
00102         virtual MemoryElement* Clone(void* aPool) const {
00103             return Create(*NS_STATIC_CAST(nsFixedSizeAllocator*, aPool), mResource); }
00104 
00105     protected:
00106         nsCOMPtr<nsIRDFResource> mResource;
00107     };
00108 
00109 protected:
00110     nsConflictSet& mConflictSet;
00111     nsTreeRows& mRows;
00112     PRInt32 mIdVariable;
00113 };
00114 
00115 #endif // nsTreeRowTestNode_h__