// -*- C++ -*-
/* This file is part of
* ======================================================
- *
+ *
* LyX, The Document Processor
- *
+ *
* Copyright 1995 Matthias Ettrich
- * Copyright 1995-2000 The LyX Team.
+ * Copyright 1995-2001 The LyX Team.
*
* ====================================================== */
#ifndef UNDO_H
#define UNDO_H
-#ifdef __GNUG__
-#pragma interface
-#endif
-
-#include <list>
-
-#include "lyxparagraph.h"
+#include "ParagraphList.h"
-
-///
+/**
+ * These are the elements put on the undo stack. Each object
+ * contains complete paragraphs and sufficient information
+ * to restore the state. The work is done in undo_funcs.C
+ */
class Undo {
public:
- /// The undo kinds
+ /**
+ * The undo kinds are used to combine consecutive undo recordings
+ * of the same kind.
+ */
enum undo_kind {
- ///
+ /**
+ * Insert something - these will combine to one big chunk
+ * when many inserts come after each other.
+ */
INSERT,
- ///
+
+ /**
+ * Delete something - these will combine to one big chunk
+ * when many deletes come after each other.
+ */
DELETE,
- ///
- EDIT,
- ///
- FINISH
+
+ /// Atomic - each of these will have its own entry in the stack
+ ATOMIC
};
///
+ Undo(undo_kind kind, int inset_id,
+ int first, int last,
+ int cursor, int cursor_pos,
+ ParagraphList const & par_arg);
+
+ /// Which kind of operation are we recording for?
undo_kind kind;
- ///
- int number_of_before_par;
- ///
- int number_of_behind_par;
- ///
- int number_of_cursor_par;
- ///
- int cursor_pos; // valid if >= 0
- ///
- LyXParagraph * par;
- ///
- Undo(undo_kind kind_arg,
- int number_before_arg, int number_behind_arg,
- int cursor_par_arg, int cursor_pos_arg,
- LyXParagraph * par_arg);
- ///
- ~Undo();
-};
+ /**
+ * ID of hosting inset if the cursor is in one.
+ * if -1, then the cursor is not in an inset.
+ * if >= 0, then the cursor is in inset with given id.
+ */
+ int inset_id;
-/// A limited Stack for the undo informations.
-class UndoStack{
-private:
- ///
- typedef std::list<Undo*> Stakk;
- ///
- Stakk stakk;
- /// the maximum number of undo steps stored.
- Stakk::size_type limit;
-public:
- ///
- UndoStack();
- ///
- Undo * pop();
- ///
- Undo * top();
- ///
- bool empty() const;
- ///
- ~UndoStack();
- ///
- void clear();
- ///
- void SetStackLimit(Stakk::size_type l);
- ///
- void push(Undo * undo_arg);
+ /// Offset to the first paragraph in the main document paragraph list
+ int first_par_offset;
+
+ /// Offset to the last paragraph from the end of the main par. list
+ int last_par_offset;
+
+ /**
+ * Offset from the start of the main document paragraph list,
+ * except if inside an inset, in which case it's the offset
+ * inside the hosting inset.
+ */
+ int cursor_par_offset;
+
+ /// The position of the cursor in the hosting paragraph
+ int cursor_pos;
+
+ /// The contents of the paragraphs saved
+ ParagraphList pars;
};
+
#endif