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

cde/programs/nsgmls/Undo.h

@@ -0,0 +1,69 @@
+/* $XConsortium: Undo.h /main/1 1996/07/29 17:07:28 cde-hp $ */
+// Copyright (c) 1994 James Clark
+// See the file COPYING for copying permission.
+
+#ifndef Undo_INCLUDED
+#define Undo_INCLUDED 1
+#ifdef __GNUG__
+#pragma interface
+#endif
+
+#include "Link.h"
+#include "ContentToken.h"
+#include "OpenElement.h"
+#include "Allocator.h"
+
+#ifdef SP_NAMESPACE
+namespace SP_NAMESPACE {
+#endif
+
+class ParserState;
+class Event;
+
+class Undo : public Link {
+public:
+  void *operator new(size_t sz, Allocator &alloc) { return alloc.alloc(sz); }
+  void *operator new(size_t sz) { return Allocator::allocSimple(sz); }
+  void operator delete(void *p) { Allocator::free(p); }
+  Undo();
+  virtual ~Undo();
+  virtual void undo(ParserState *) = 0;
+private:
+  Undo(const Undo &);		// undefined
+  void operator=(const Undo &);	// undefined
+};
+
+class UndoTransition : public Undo {
+public:
+  UndoTransition(const MatchState &);
+  void undo(ParserState *);
+private:
+  UndoTransition(const UndoTransition &); // undefined
+  void operator=(const UndoTransition &); // undefined
+  MatchState state_;
+};
+
+class UndoStartTag : public Undo {
+public:
+  UndoStartTag();
+  void undo(ParserState *);
+private:
+  UndoStartTag(const UndoStartTag &); // undefined
+  void operator=(const UndoStartTag &);	// undefined
+};
+
+class UndoEndTag : public Undo {
+public:
+  UndoEndTag(OpenElement *);
+  void undo(ParserState *);
+private:
+  UndoEndTag(const UndoEndTag &); // undefined
+  void operator=(const UndoEndTag &); // undefined
+  Owner<OpenElement> element_;
+};
+
+#ifdef SP_NAMESPACE
+}
+#endif
+
+#endif /* not Undo_INCLUDED */