1 files changed, 80 insertions, 0 deletions

diff --git a/src/undo.h b/src/undo.h
new file mode 100644
index 0000000..1376d1e
--- /dev/null
+++ b/src/undo.h
@@ -0,0 +1,80 @@
+/*
+ * 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__ */