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gimp/app/core/gimpundo.c

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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 "core-types.h"
#include "base/temp-buf.h"
#include "gimpimage.h"
#include "gimpmarshal.h"
#include "gimpundo.h"
#include "gimpundostack.h"
enum
{
POP,
FREE,
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 gsize gimp_undo_get_memsize (GimpObject *object);
static gboolean gimp_undo_get_popup_size (GimpViewable *viewable,
gint width,
gint height,
gboolean dot_for_dot,
gint *popup_width,
gint *popup_height);
static TempBuf * gimp_undo_get_new_preview (GimpViewable *viewable,
gint width,
gint height);
static void gimp_undo_real_pop (GimpUndo *undo,
GimpUndoMode undo_mode,
GimpUndoAccumulator *accum);
static void gimp_undo_real_free (GimpUndo *undo,
GimpUndoMode undo_mode);
static gboolean gimp_undo_create_preview_idle (gpointer data);
static void gimp_undo_create_preview_private (GimpUndo *undo);
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;
GimpObjectClass *gimp_object_class;
GimpViewableClass *viewable_class;
object_class = G_OBJECT_CLASS (klass);
gimp_object_class = GIMP_OBJECT_CLASS (klass);
viewable_class = GIMP_VIEWABLE_CLASS (klass);
parent_class = g_type_class_peek_parent (klass);
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__ENUM_POINTER,
G_TYPE_NONE, 2,
GIMP_TYPE_UNDO_MODE,
G_TYPE_POINTER);
undo_signals[FREE] =
g_signal_new ("free",
G_TYPE_FROM_CLASS (klass),
G_SIGNAL_RUN_FIRST,
G_STRUCT_OFFSET (GimpUndoClass, free),
NULL, NULL,
gimp_marshal_VOID__ENUM,
G_TYPE_NONE, 1,
GIMP_TYPE_UNDO_MODE);
object_class->finalize = gimp_undo_finalize;
gimp_object_class->get_memsize = gimp_undo_get_memsize;
viewable_class->get_popup_size = gimp_undo_get_popup_size;
viewable_class->get_new_preview = gimp_undo_get_new_preview;
klass->pop = gimp_undo_real_pop;
klass->free = gimp_undo_real_free;
}
static void
gimp_undo_init (GimpUndo *undo)
{
undo->gimage = NULL;
undo->undo_type = 0;
undo->data = NULL;
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->preview_idle_id)
{
g_source_remove (undo->preview_idle_id);
undo->preview_idle_id = 0;
}
if (undo->preview)
{
temp_buf_free (undo->preview);
undo->preview = NULL;
}
G_OBJECT_CLASS (parent_class)->finalize (object);
}
static gsize
gimp_undo_get_memsize (GimpObject *object)
{
GimpUndo *undo;
gsize memsize = 0;
undo = GIMP_UNDO (object);
memsize += undo->size;
if (undo->preview)
memsize += temp_buf_get_memsize (undo->preview);
return memsize + GIMP_OBJECT_CLASS (parent_class)->get_memsize (object);
}
static gboolean
gimp_undo_get_popup_size (GimpViewable *viewable,
gint width,
gint height,
gboolean dot_for_dot,
gint *popup_width,
gint *popup_height)
{
GimpUndo *undo;
undo = GIMP_UNDO (viewable);
if (undo->preview &&
(undo->preview->width > width || undo->preview->height > height))
{
*popup_width = undo->preview->width;
*popup_height = undo->preview->height;
return TRUE;
}
return FALSE;
}
static TempBuf *
gimp_undo_get_new_preview (GimpViewable *viewable,
gint width,
gint height)
{
GimpUndo *undo;
undo = GIMP_UNDO (viewable);
if (undo->preview)
{
gint preview_width;
gint preview_height;
gimp_viewable_calc_preview_size (viewable,
undo->preview->width,
undo->preview->height,
width,
height,
TRUE, 1.0, 1.0,
&preview_width,
&preview_height,
NULL);
if (preview_width < undo->preview->width &&
preview_height < undo->preview->height)
{
return temp_buf_scale (undo->preview, preview_width, preview_height);
}
return temp_buf_copy (undo->preview, NULL);
}
return NULL;
}
static void
gimp_undo_real_pop (GimpUndo *undo,
GimpUndoMode undo_mode,
GimpUndoAccumulator *accum)
{
if (undo->pop_func)
undo->pop_func (undo, undo_mode, accum);
}
static void
gimp_undo_real_free (GimpUndo *undo,
GimpUndoMode undo_mode)
{
if (undo->free_func)
undo->free_func (undo, undo_mode);
}
GimpUndo *
gimp_undo_new (GimpImage *gimage,
GimpUndoType undo_type,
const gchar *name,
gpointer data,
gsize size,
gboolean dirties_image,
GimpUndoPopFunc pop_func,
GimpUndoFreeFunc free_func)
{
GimpUndo *undo;
g_return_val_if_fail (GIMP_IS_IMAGE (gimage), NULL);
g_return_val_if_fail (name != NULL, NULL);
g_return_val_if_fail (size == 0 || data != NULL, NULL);
undo = g_object_new (GIMP_TYPE_UNDO,
"name", name,
NULL);
undo->gimage = gimage;
undo->undo_type = undo_type;
undo->data = data;
undo->size = size;
undo->dirties_image = dirties_image ? TRUE : FALSE;
undo->pop_func = pop_func;
undo->free_func = free_func;
return undo;
}
void
gimp_undo_pop (GimpUndo *undo,
GimpUndoMode undo_mode,
GimpUndoAccumulator *accum)
{
g_return_if_fail (GIMP_IS_UNDO (undo));
g_return_if_fail (accum != NULL);
g_signal_emit (undo, undo_signals[POP], 0, undo_mode, accum);
if (undo->dirties_image)
{
switch (undo_mode)
{
case GIMP_UNDO_MODE_UNDO:
gimp_image_clean (undo->gimage);
break;
case GIMP_UNDO_MODE_REDO:
gimp_image_dirty (undo->gimage);
break;
}
}
}
void
gimp_undo_free (GimpUndo *undo,
GimpUndoMode undo_mode)
{
g_return_if_fail (GIMP_IS_UNDO (undo));
g_signal_emit (undo, undo_signals[FREE], 0, undo_mode);
}
void
gimp_undo_create_preview (GimpUndo *undo,
gboolean create_now)
{
g_return_if_fail (GIMP_IS_UNDO (undo));
if (undo->preview || undo->preview_idle_id)
return;
if (create_now)
gimp_undo_create_preview_private (undo);
else
undo->preview_idle_id = g_idle_add (gimp_undo_create_preview_idle, undo);
}
static gboolean
gimp_undo_create_preview_idle (gpointer data)
{
GimpUndo *undo;
undo = GIMP_UNDO (data);
if (undo == gimp_undo_stack_peek (undo->gimage->undo_stack))
{
gimp_undo_create_preview_private (undo);
}
undo->preview_idle_id = 0;
return FALSE;
}
void
gimp_undo_create_preview_private (GimpUndo *undo)
{
GimpViewable *preview_viewable;
gint width;
gint height;
switch (undo->undo_type)
{
case GIMP_UNDO_GROUP_IMAGE_QMASK:
case GIMP_UNDO_GROUP_MASK:
case GIMP_UNDO_IMAGE_QMASK:
case GIMP_UNDO_MASK:
preview_viewable = GIMP_VIEWABLE (gimp_image_get_mask (undo->gimage));
break;
default:
preview_viewable = GIMP_VIEWABLE (undo->gimage);
break;
}
if (undo->gimage->width <= GIMP_UNDO_PREVIEW_SIZE &&
undo->gimage->height <= GIMP_UNDO_PREVIEW_SIZE)
{
width = undo->gimage->width;
height = undo->gimage->height;
}
else
{
if (undo->gimage->width > undo->gimage->height)
{
width = GIMP_UNDO_PREVIEW_SIZE;
height = MAX (1, (undo->gimage->height * GIMP_UNDO_PREVIEW_SIZE /
undo->gimage->width));
}
else
{
height = GIMP_UNDO_PREVIEW_SIZE;
width = MAX (1, (undo->gimage->width * GIMP_UNDO_PREVIEW_SIZE /
undo->gimage->height));
}
}
undo->preview = gimp_viewable_get_new_preview (preview_viewable,
width, height);
gimp_viewable_invalidate_preview (GIMP_VIEWABLE (undo));
}
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