Initial import of the CDE 2.1.30 sources from the Open Group.

cde/programs/nsgmls/Undo.C

@@ -0,0 +1,55 @@
+/* $XConsortium: Undo.C /main/1 1996/07/29 17:07:24 cde-hp $ */
+// 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