dom/xslt/xpath/txNodeSetContext.h

   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 __TX_XPATH_SET_CONTEXT
   7 #define __TX_XPATH_SET_CONTEXT
   8
   9 #include "txIXPathContext.h"
  10 #include "txNodeSet.h"
  11 #include "nsAutoPtr.h"
  12
  13 class txNodeSetContext : public txIEvalContext
  14 {
  15 public:
  16     txNodeSetContext(txNodeSet* aContextNodeSet, txIMatchContext* aContext)
  17         : mContextSet(aContextNodeSet), mPosition(0), mInner(aContext)
  18     {
  19     }
  20
  21     // Iteration over the given NodeSet
  22     bool hasNext()
  23     {
  24         return mPosition < size();
  25     }
  26     void next()
  27     {
  28         NS_ASSERTION(mPosition < size(), "Out of bounds.");
  29         mPosition++;
  30     }
  31     void setPosition(uint32_t aPosition)
  32     {
  33         NS_ASSERTION(aPosition > 0 &&
  34                      aPosition <= size(), "Out of bounds.");
  35         mPosition = aPosition;
  36     }
  37
  38     TX_DECL_EVAL_CONTEXT;
  39
  40 protected:
  41     nsRefPtr<txNodeSet> mContextSet;
  42     uint32_t mPosition;
  43     txIMatchContext* mInner;
  44 };
  45
  46 #endif // __TX_XPATH_SET_CONTEXT