src/undo.h

   1 /* logjam - a GTK client for LiveJournal.
   2  * Copyright (C) 2000-2003 Evan Martin <evan@livejournal.com>
   3  * Ported to LogJam by Ari Pollak <ari@debian.org>
   4  *
   5  * This file is based on gedit-undo-manager.h from gEdit 2.2.1.
   6  * Original authors:
   7  * Copyright (C) 1998, 1999 Alex Roberts, Evan Lawrence
   8  * Copyright (C) 2000, 2001 Chema Celorio, Paolo Maggi
   9  */
  10
  11 #ifndef __LOGJAM_UNDOMGR_H__
  12 #define __LOGJAM_UNDOMGR_H__
  13
  14 #define TYPE_UNDOMGR              (undomgr_get_type ())
  15 #define UNDOMGR(obj)              (GTK_CHECK_CAST ((obj), TYPE_UNDOMGR, UndoMgr))
  16 #define UNDOMGR_CLASS(klass)      (GTK_CHECK_CLASS_CAST ((klass), TYPE_UNDOMGR, UndoMgrClass))
  17 #define IS_UNDOMGR(obj)           (GTK_CHECK_TYPE ((obj), TYPE_UNDOMGR))
  18 #define IS_UNDOMGR_CLASS(klass)   (GTK_CHECK_CLASS_TYPE ((klass), TYPE_UNDOMGR))
  19 #define UNDOMGR_GET_CLASS(obj)    (GTK_CHECK_GET_CLASS ((obj), TYPE_UNDOMGR, UndoMgrClass))
  20
  21
  22 typedef struct _UndoMgrPrivate UndoMgrPrivate;
  23
  24
  25 typedef struct {
  26   GObject base;
  27   UndoMgrPrivate *priv;
  28 } UndoMgr;
  29
  30
  31 typedef struct {
  32   GObjectClass parent_class;
  33   /* Signals */
  34   void (*can_undo) (UndoMgr *um, gboolean can_undo);
  35   void (*can_redo) (UndoMgr *um, gboolean can_redo);
  36 } UndoMgrClass;
  37
  38
  39 GType undomgr_get_type (void) G_GNUC_CONST;
  40
  41 extern GObject *undomgr_new (void);
  42 extern void undomgr_attach (UndoMgr *um, GtkWidget *widget);
  43 extern void undomgr_detach (UndoMgr *um, GtkWidget *widget);
  44
  45 /* Clears the stack of undo actions: */
  46 extern void undomgr_reset (UndoMgr *um);
  47
  48 extern gboolean undomgr_can_undo (const UndoMgr *um);
  49 extern gboolean undomgr_can_redo (const UndoMgr *um);
  50
  51 extern void undomgr_undo (UndoMgr *um);
  52 extern void undomgr_redo (UndoMgr *um);
  53
  54 extern void undomgr_begin_not_undoable_action (UndoMgr *um);
  55 extern void undomgr_end_not_undoable_action (UndoMgr *um);
  56
  57
  58 #endif