gimp/app/core/gimpundo.c

230 lines
5.4 KiB
C

/* 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 "core-types.h"
#include "base/temp-buf.h"
#include "gimpimage.h"
#include "gimpmarshal.h"
#include "gimpundo.h"
enum
{
PUSH,
POP,
LAST_SIGNAL
};
static void gimp_undo_class_init (GimpUndoClass *klass);
static void gimp_undo_init (GimpUndo *undo);
static void gimp_undo_finalize (GObject *object);
static void gimp_undo_real_push (GimpUndo *undo,
GimpImage *gimage);
static void gimp_undo_real_pop (GimpUndo *undo,
GimpImage *gimage);
static TempBuf * gimp_undo_get_preview (GimpViewable *viewable,
gint width,
gint height);
static guint undo_signals[LAST_SIGNAL] = { 0 };
static GimpViewableClass *parent_class = NULL;
GType
gimp_undo_get_type (void)
{
static GType undo_type = 0;
if (! undo_type)
{
static const GTypeInfo undo_info =
{
sizeof (GimpUndoClass),
(GBaseInitFunc) NULL,
(GBaseFinalizeFunc) NULL,
(GClassInitFunc) gimp_undo_class_init,
NULL, /* class_finalize */
NULL, /* class_data */
sizeof (GimpUndo),
0, /* n_preallocs */
(GInstanceInitFunc) gimp_undo_init,
};
undo_type = g_type_register_static (GIMP_TYPE_VIEWABLE,
"GimpUndo",
&undo_info, 0);
}
return undo_type;
}
static void
gimp_undo_class_init (GimpUndoClass *klass)
{
GObjectClass *object_class;
GimpViewableClass *viewable_class;
object_class = G_OBJECT_CLASS (klass);
viewable_class = GIMP_VIEWABLE_CLASS (klass);
parent_class = g_type_class_peek_parent (klass);
undo_signals[PUSH] =
g_signal_new ("push",
G_TYPE_FROM_CLASS (klass),
G_SIGNAL_RUN_FIRST,
G_STRUCT_OFFSET (GimpUndoClass, push),
NULL, NULL,
gimp_marshal_VOID__POINTER,
G_TYPE_NONE, 1,
G_TYPE_POINTER);
undo_signals[POP] =
g_signal_new ("pop",
G_TYPE_FROM_CLASS (klass),
G_SIGNAL_RUN_FIRST,
G_STRUCT_OFFSET (GimpUndoClass, pop),
NULL, NULL,
gimp_marshal_VOID__POINTER,
G_TYPE_NONE, 1,
G_TYPE_POINTER);
object_class->finalize = gimp_undo_finalize;
viewable_class->get_preview = gimp_undo_get_preview;
klass->push = gimp_undo_real_push;
klass->pop = gimp_undo_real_pop;
}
static void
gimp_undo_init (GimpUndo *undo)
{
undo->data = NULL;
undo->size = 0;
undo->dirties_image = FALSE;
undo->pop_func = NULL;
undo->free_func = NULL;
undo->preview = NULL;
}
static void
gimp_undo_finalize (GObject *object)
{
GimpUndo *undo;
undo = GIMP_UNDO (object);
if (undo->free_func)
{
undo->free_func (undo);
undo->free_func = NULL;
}
if (undo->preview)
{
temp_buf_free (undo->preview);
undo->preview = NULL;
}
G_OBJECT_CLASS (parent_class)->finalize (object);
}
GimpUndo *
gimp_undo_new (const gchar *name,
gpointer data,
glong size,
gboolean dirties_image,
GimpUndoPopFunc pop_func,
GimpUndoFreeFunc free_func)
{
GimpUndo *undo;
undo = GIMP_UNDO (g_object_new (GIMP_TYPE_UNDO, NULL));
gimp_object_set_name (GIMP_OBJECT (undo), name);
undo->data = data;
undo->size = sizeof (GimpUndo) + size;
undo->pop_func = pop_func;
undo->free_func = free_func;
return undo;
}
void
gimp_undo_push (GimpUndo *undo,
GimpImage *gimage)
{
g_return_if_fail (GIMP_IS_UNDO (undo));
g_return_if_fail (GIMP_IS_IMAGE (gimage));
g_signal_emit (G_OBJECT (undo), undo_signals[PUSH], 0,
gimage);
}
void
gimp_undo_pop (GimpUndo *undo,
GimpImage *gimage)
{
g_return_if_fail (GIMP_IS_UNDO (undo));
g_return_if_fail (GIMP_IS_IMAGE (gimage));
g_signal_emit (G_OBJECT (undo), undo_signals[POP], 0,
gimage);
}
static void
gimp_undo_real_push (GimpUndo *undo,
GimpImage *gimage)
{
/* FIXME: need core_config->undo_preview_size */
undo->preview = gimp_viewable_get_preview (GIMP_VIEWABLE (gimage),
24,
24);
}
static void
gimp_undo_real_pop (GimpUndo *undo,
GimpImage *gimage)
{
if (undo->pop_func)
undo->pop_func (undo, gimage);
}
static TempBuf *
gimp_undo_get_preview (GimpViewable *viewable,
gint width,
gint height)
{
return (GIMP_UNDO (viewable)->preview);
}