gimp/app/core/gimpundostack.c

212 lines
5.5 KiB
C

/* GIMP - The GNU 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 3 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, see <http://www.gnu.org/licenses/>.
*/
#include "config.h"
#include <gegl.h>
#include "core-types.h"
#include "gimpimage.h"
#include "gimplist.h"
#include "gimpundo.h"
#include "gimpundostack.h"
static void gimp_undo_stack_finalize (GObject *object);
static gint64 gimp_undo_stack_get_memsize (GimpObject *object,
gint64 *gui_size);
static void gimp_undo_stack_pop (GimpUndo *undo,
GimpUndoMode undo_mode,
GimpUndoAccumulator *accum);
static void gimp_undo_stack_free (GimpUndo *undo,
GimpUndoMode undo_mode);
G_DEFINE_TYPE (GimpUndoStack, gimp_undo_stack, GIMP_TYPE_UNDO)
#define parent_class gimp_undo_stack_parent_class
static void
gimp_undo_stack_class_init (GimpUndoStackClass *klass)
{
GObjectClass *object_class = G_OBJECT_CLASS (klass);
GimpObjectClass *gimp_object_class = GIMP_OBJECT_CLASS (klass);
GimpUndoClass *undo_class = GIMP_UNDO_CLASS (klass);
object_class->finalize = gimp_undo_stack_finalize;
gimp_object_class->get_memsize = gimp_undo_stack_get_memsize;
undo_class->pop = gimp_undo_stack_pop;
undo_class->free = gimp_undo_stack_free;
}
static void
gimp_undo_stack_init (GimpUndoStack *stack)
{
stack->undos = gimp_list_new (GIMP_TYPE_UNDO, FALSE);
}
static void
gimp_undo_stack_finalize (GObject *object)
{
GimpUndoStack *stack = GIMP_UNDO_STACK (object);
if (stack->undos)
{
g_object_unref (stack->undos);
stack->undos = NULL;
}
G_OBJECT_CLASS (parent_class)->finalize (object);
}
static gint64
gimp_undo_stack_get_memsize (GimpObject *object,
gint64 *gui_size)
{
GimpUndoStack *stack = GIMP_UNDO_STACK (object);
gint64 memsize = 0;
memsize += gimp_object_get_memsize (GIMP_OBJECT (stack->undos), gui_size);
return memsize + GIMP_OBJECT_CLASS (parent_class)->get_memsize (object,
gui_size);
}
static void
gimp_undo_stack_pop (GimpUndo *undo,
GimpUndoMode undo_mode,
GimpUndoAccumulator *accum)
{
GimpUndoStack *stack = GIMP_UNDO_STACK (undo);
GList *list;
for (list = GIMP_LIST (stack->undos)->list;
list;
list = g_list_next (list))
{
GimpUndo *child = list->data;
gimp_undo_pop (child, undo_mode, accum);
}
}
static void
gimp_undo_stack_free (GimpUndo *undo,
GimpUndoMode undo_mode)
{
GimpUndoStack *stack = GIMP_UNDO_STACK (undo);
GList *list;
for (list = GIMP_LIST (stack->undos)->list;
list;
list = g_list_next (list))
{
GimpUndo *child = list->data;
gimp_undo_free (child, undo_mode);
g_object_unref (child);
}
gimp_container_clear (stack->undos);
}
GimpUndoStack *
gimp_undo_stack_new (GimpImage *image)
{
g_return_val_if_fail (GIMP_IS_IMAGE (image), NULL);
return g_object_new (GIMP_TYPE_UNDO_STACK,
"image", image,
NULL);
}
void
gimp_undo_stack_push_undo (GimpUndoStack *stack,
GimpUndo *undo)
{
g_return_if_fail (GIMP_IS_UNDO_STACK (stack));
g_return_if_fail (GIMP_IS_UNDO (undo));
gimp_container_add (stack->undos, GIMP_OBJECT (undo));
}
GimpUndo *
gimp_undo_stack_pop_undo (GimpUndoStack *stack,
GimpUndoMode undo_mode,
GimpUndoAccumulator *accum)
{
GimpUndo *undo;
g_return_val_if_fail (GIMP_IS_UNDO_STACK (stack), NULL);
g_return_val_if_fail (accum != NULL, NULL);
undo = GIMP_UNDO (gimp_container_get_first_child (stack->undos));
if (undo)
{
gimp_container_remove (stack->undos, GIMP_OBJECT (undo));
gimp_undo_pop (undo, undo_mode, accum);
return undo;
}
return NULL;
}
GimpUndo *
gimp_undo_stack_free_bottom (GimpUndoStack *stack,
GimpUndoMode undo_mode)
{
GimpUndo *undo;
g_return_val_if_fail (GIMP_IS_UNDO_STACK (stack), NULL);
undo = GIMP_UNDO (gimp_container_get_last_child (stack->undos));
if (undo)
{
gimp_container_remove (stack->undos, GIMP_OBJECT (undo));
gimp_undo_free (undo, undo_mode);
return undo;
}
return NULL;
}
GimpUndo *
gimp_undo_stack_peek (GimpUndoStack *stack)
{
g_return_val_if_fail (GIMP_IS_UNDO_STACK (stack), NULL);
return GIMP_UNDO (gimp_container_get_first_child (stack->undos));
}
gint
gimp_undo_stack_get_depth (GimpUndoStack *stack)
{
g_return_val_if_fail (GIMP_IS_UNDO_STACK (stack), 0);
return gimp_container_get_n_children (stack->undos);
}