// Copyright (c) 1994 James Clark

// See the file COPYING for copying permission.

#ifdef __GNUG__

#pragma implementation

#endif

#include "splib.h"

#include "Undo.h"

#include "ParserState.h"

#ifdef SP_NAMESPACE

namespace SP_NAMESPACE {

#endif

Undo::Undo()

{

}

Undo::~Undo()

{

}

UndoTransition::UndoTransition(const MatchState &state)

: state_(state)

{

}

void UndoTransition::undo(ParserState *parser)

{

  parser->currentElement().setMatchState(state_);

}

UndoStartTag::UndoStartTag()

{

}

void UndoStartTag::undo(ParserState *parser)

{

  parser->popElement();

}

UndoEndTag::UndoEndTag(OpenElement *e)

: element_(e)

{

}

void UndoEndTag::undo(ParserState *parser)

{

  parser->pushElement(element_.extract());

}

#ifdef SP_NAMESPACE

}

#endif