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lightning-sunbird  0.9+nobinonly
txNodeSetContext.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 TransforMiiX XSLT processor code.
00016  *
00017  * The Initial Developer of the Original Code is
00018  * Axel Hecht.
00019  * Portions created by the Initial Developer are Copyright (C) 2001
00020  * the Initial Developer. All Rights Reserved.
00021  *
00022  * Contributor(s):
00023  *   Axel Hecht <axel@pike.org>
00024  *
00025  * Alternatively, the contents of this file may be used under the terms of
00026  * either the GNU General Public License Version 2 or later (the "GPL"), or
00027  * 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
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00036  *
00037  * ***** END LICENSE BLOCK ***** */
00038 
00039 #ifndef __TX_XPATH_SET_CONTEXT
00040 #define __TX_XPATH_SET_CONTEXT
00041 
00042 #include "txIXPathContext.h"
00043 #include "txNodeSet.h"
00044 #include "nsAutoPtr.h"
00045 
00046 class txNodeSetContext : public txIEvalContext
00047 {
00048 public:
00049     txNodeSetContext(txNodeSet* aContextNodeSet, txIMatchContext* aContext)
00050         : mContextSet(aContextNodeSet), mPosition(0), mInner(aContext)
00051     {
00052     }
00053     virtual ~txNodeSetContext()
00054     {
00055     }
00056 
00057     // Iteration over the given NodeSet
00058     MBool hasNext()
00059     {
00060         return mPosition < size();
00061     }
00062     void next()
00063     {
00064         NS_ASSERTION(mPosition < size(), "Out of bounds.");
00065         mPosition++;
00066     }
00067     void setPosition(PRUint32 aPosition)
00068     {
00069         NS_ASSERTION(aPosition > 0 &&
00070                      aPosition <= size(), "Out of bounds.");
00071         mPosition = aPosition;
00072     }
00073 
00074     TX_DECL_EVAL_CONTEXT;
00075 
00076 protected:
00077     nsRefPtr<txNodeSet> mContextSet;
00078     PRUint32 mPosition;
00079     txIMatchContext* mInner;
00080 };
00081 
00082 #endif // __TX_XPATH_SET_CONTEXT