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 __TX_XPATH_SET_CONTEXT
michael@0: #define __TX_XPATH_SET_CONTEXT
michael@0: 
michael@0: #include "txIXPathContext.h"
michael@0: #include "txNodeSet.h"
michael@0: #include "nsAutoPtr.h"
michael@0: 
michael@0: class txNodeSetContext : public txIEvalContext
michael@0: {
michael@0: public:
michael@0:     txNodeSetContext(txNodeSet* aContextNodeSet, txIMatchContext* aContext)
michael@0:         : mContextSet(aContextNodeSet), mPosition(0), mInner(aContext)
michael@0:     {
michael@0:     }
michael@0: 
michael@0:     // Iteration over the given NodeSet
michael@0:     bool hasNext()
michael@0:     {
michael@0:         return mPosition < size();
michael@0:     }
michael@0:     void next()
michael@0:     {
michael@0:         NS_ASSERTION(mPosition < size(), "Out of bounds.");
michael@0:         mPosition++;
michael@0:     }
michael@0:     void setPosition(uint32_t aPosition)
michael@0:     {
michael@0:         NS_ASSERTION(aPosition > 0 &&
michael@0:                      aPosition <= size(), "Out of bounds.");
michael@0:         mPosition = aPosition;
michael@0:     }
michael@0: 
michael@0:     TX_DECL_EVAL_CONTEXT;
michael@0: 
michael@0: protected:
michael@0:     nsRefPtr<txNodeSet> mContextSet;
michael@0:     uint32_t mPosition;
michael@0:     txIMatchContext* mInner;
michael@0: };
michael@0: 
michael@0: #endif // __TX_XPATH_SET_CONTEXT