mirror of https://github.com/GNOME/gimp.git
120 lines
3.1 KiB
C
120 lines
3.1 KiB
C
/* The GIMP -- an image manipulation program
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* Copyright (C) 1995 Spencer Kimball and Peter Mattis
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*/
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#include "config.h"
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#include <glib-object.h>
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#include "paint-types.h"
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#include "core/gimpimage-undo.h"
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#include "core/gimpimage.h"
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#include "core/gimpundo.h"
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#include "gimppaintcore.h"
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#include "gimp-intl.h"
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/****************/
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/* Paint Undo */
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/****************/
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typedef struct _PaintUndo PaintUndo;
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struct _PaintUndo
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{
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GimpPaintCore *core;
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GimpCoords last_coords;
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};
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static gboolean undo_pop_paint (GimpUndo *undo,
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GimpUndoMode undo_mode,
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GimpUndoAccumulator *accum);
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static void undo_free_paint (GimpUndo *undo,
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GimpUndoMode undo_mode);
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gboolean
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gimp_paint_core_push_undo (GimpImage *gimage,
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const gchar *undo_desc,
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GimpPaintCore *core)
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{
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GimpUndo *new;
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g_return_val_if_fail (GIMP_IS_IMAGE (gimage), FALSE);
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g_return_val_if_fail (GIMP_IS_PAINT_CORE (core), FALSE);
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if ((new = gimp_image_undo_push (gimage,
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sizeof (PaintUndo),
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sizeof (PaintUndo),
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GIMP_UNDO_PAINT, undo_desc,
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FALSE,
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undo_pop_paint,
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undo_free_paint)))
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{
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PaintUndo *pu;
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pu = new->data;
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pu->core = core;
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pu->last_coords = core->start_coords;
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g_object_add_weak_pointer (G_OBJECT (core), (gpointer) &pu->core);
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return TRUE;
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}
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return FALSE;
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}
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static gboolean
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undo_pop_paint (GimpUndo *undo,
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GimpUndoMode undo_mode,
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GimpUndoAccumulator *accum)
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{
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PaintUndo *pu;
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pu = (PaintUndo *) undo->data;
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/* only pop if the core still exists */
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if (pu->core)
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{
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GimpCoords tmp_coords;
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tmp_coords = pu->core->last_coords;
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pu->core->last_coords = pu->last_coords;
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pu->last_coords = tmp_coords;
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}
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return TRUE;
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}
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static void
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undo_free_paint (GimpUndo *undo,
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GimpUndoMode undo_mode)
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{
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PaintUndo *pu;
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pu = (PaintUndo *) undo->data;
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if (pu->core)
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g_object_remove_weak_pointer (G_OBJECT (pu->core), (gpointer) &pu->core);
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g_free (pu);
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}
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