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Viewing changes to app/paint/gimppaintcore-undo.c

  • Committer: Bazaar Package Importer
  • Author(s): Sebastien Bacher
  • Date: 2005-10-04 19:04:46 UTC
  • Revision ID: james.westby@ubuntu.com-20051004190446-ukh32kwk56s4sjhu
Tags: upstream-2.2.8
Import upstream version 2.2.8

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app/paint/gimppaintcore-undo.c
 
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/* 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_real_push_undo (GimpPaintCore *core,
 
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                                GimpImage     *gimage,
 
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                                const gchar   *undo_desc)
 
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{
 
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  GimpUndo *new;
 
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  g_return_val_if_fail (GIMP_IS_PAINT_CORE (core), FALSE);
 
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  g_return_val_if_fail (GIMP_IS_IMAGE (gimage), FALSE);
 
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  if ((new = gimp_image_undo_push (gimage, GIMP_TYPE_UNDO,
 
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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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                                   NULL)))
 
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    {
 
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      PaintUndo *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 = 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 = 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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}