Sylpheed

/*

 * Sylpheed -- a GTK+ based, lightweight, and fast e-mail client

 * Copyright (C) 1999-2001 Hiroyuki Yamamoto

 *

 * This program is free software; you can redistribute it and/or modify

 * it under the terms of the GNU General Public License as published by

 * the Free Software Foundation; either version 2 of the License, or

 * (at your option) any later version.

 *

 * This program is distributed in the hope that it will be useful,

 * but WITHOUT ANY WARRANTY; without even the implied warranty of

 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

 * GNU General Public License for more details.

 *

 * You should have received a copy of the GNU General Public License

 * along with this program; if not, write to the Free Software

 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.

 */

/* code ported from gedit */

#ifndef __UNDO_H__

#define __UNDO_H__

#include <glib.h>

#include <gtk/gtktextview.h>

#include <gtk/gtkitemfactory.h>

typedef enum 

{

        UNDO_ACTION_INSERT,

        UNDO_ACTION_DELETE,

        UNDO_ACTION_REPLACE_INSERT,

        UNDO_ACTION_REPLACE_DELETE,

} UndoAction;

typedef enum 

{

        UNDO_STATE_TRUE,

        UNDO_STATE_FALSE,

        UNDO_STATE_UNCHANGED,

        UNDO_STATE_REFRESH,

} UndoState;

typedef struct _UndoMain UndoMain;

typedef void (*UndoChangeStateFunc)        (UndoMain        *undostruct,

                                         gint                 undo_state,

                                         gint                 redo_state,

                                         gpointer         data);

struct _UndoMain 

{

        GtkTextView *textview;

        GList *undo;

        GList *redo;

        UndoChangeStateFunc change_state_func;

        gpointer change_state_data;

        gboolean undo_state : 1;

        gboolean redo_state : 1;

        gint paste;

};

UndoMain *undo_init                (GtkWidget                *text);

void undo_destroy                (UndoMain                *undostruct);

void undo_set_change_state_func        (UndoMain                *undostruct,

                                 UndoChangeStateFunc         func,

                                 gpointer                 data);

void undo_undo                        (UndoMain                *undostruct); 

void undo_redo                        (UndoMain                *undostruct); 

void undo_block                        (UndoMain                *undostruct);

void undo_unblock                (UndoMain                *undostruct);

#endif /* __UNDO_H__ */