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/* The GIMP -- an image manipulation program
* Copyright (C) 1995 Spencer Kimball and Peter Mattis
*
* 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.
*/
#include "config.h"
#include <glib-object.h>
#include "paint-types.h"
#include "core/gimpimage-undo.h"
#include "core/gimpimage.h"
#include "core/gimpundo.h"
#include "gimppaintcore.h"
#include "gimp-intl.h"
/****************/
/* Paint Undo */
/****************/
typedef struct _PaintUndo PaintUndo;
struct _PaintUndo
{
GimpPaintCore *core;
GimpCoords last_coords;
};
static gboolean undo_pop_paint (GimpUndo *undo,
GimpUndoMode undo_mode,
GimpUndoAccumulator *accum);
static void undo_free_paint (GimpUndo *undo,
GimpUndoMode undo_mode);
gboolean
gimp_paint_core_real_push_undo (GimpPaintCore *core,
GimpImage *gimage,
const gchar *undo_desc)
{
GimpUndo *new;
g_return_val_if_fail (GIMP_IS_PAINT_CORE (core), FALSE);
g_return_val_if_fail (GIMP_IS_IMAGE (gimage), FALSE);
if ((new = gimp_image_undo_push (gimage, GIMP_TYPE_UNDO,
sizeof (PaintUndo),
sizeof (PaintUndo),
GIMP_UNDO_PAINT, undo_desc,
FALSE,
undo_pop_paint,
undo_free_paint,
NULL)))
{
PaintUndo *pu = new->data;
pu->core = core;
pu->last_coords = core->start_coords;
g_object_add_weak_pointer (G_OBJECT (core), (gpointer) &pu->core);
return TRUE;
}
return FALSE;
}
static gboolean
undo_pop_paint (GimpUndo *undo,
GimpUndoMode undo_mode,
GimpUndoAccumulator *accum)
{
PaintUndo *pu = undo->data;
/* only pop if the core still exists */
if (pu->core)
{
GimpCoords tmp_coords;
tmp_coords = pu->core->last_coords;
pu->core->last_coords = pu->last_coords;
pu->last_coords = tmp_coords;
}
return TRUE;
}
static void
undo_free_paint (GimpUndo *undo,
GimpUndoMode undo_mode)
{
PaintUndo *pu = undo->data;
if (pu->core)
g_object_remove_weak_pointer (G_OBJECT (pu->core), (gpointer) &pu->core);
g_free (pu);
}
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