mirror of https://github.com/GNOME/gimp.git
267 lines
6.7 KiB
C
267 lines
6.7 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 "core-types.h"
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#include "gimpimage.h"
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#include "gimplist.h"
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#include "gimpundo.h"
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#include "gimpundostack.h"
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static void gimp_undo_stack_class_init (GimpUndoStackClass *klass);
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static void gimp_undo_stack_init (GimpUndoStack *stack);
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static void gimp_undo_stack_finalize (GObject *object);
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static gsize gimp_undo_stack_get_memsize (GimpObject *object);
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static void gimp_undo_stack_pop (GimpUndo *undo,
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GimpUndoMode undo_mode,
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GimpUndoAccumulator *accum);
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static void gimp_undo_stack_free (GimpUndo *undo,
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GimpUndoMode undo_mode);
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static GimpUndoClass *parent_class = NULL;
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GType
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gimp_undo_stack_get_type (void)
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{
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static GType undo_stack_type = 0;
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if (! undo_stack_type)
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{
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static const GTypeInfo undo_stack_info =
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{
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sizeof (GimpUndoStackClass),
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(GBaseInitFunc) NULL,
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(GBaseFinalizeFunc) NULL,
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(GClassInitFunc) gimp_undo_stack_class_init,
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NULL, /* class_finalize */
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NULL, /* class_data */
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sizeof (GimpUndoStack),
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0, /* n_preallocs */
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(GInstanceInitFunc) gimp_undo_stack_init,
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};
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undo_stack_type = g_type_register_static (GIMP_TYPE_UNDO,
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"GimpUndoStack",
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&undo_stack_info, 0);
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}
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return undo_stack_type;
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}
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static void
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gimp_undo_stack_class_init (GimpUndoStackClass *klass)
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{
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GObjectClass *object_class;
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GimpObjectClass *gimp_object_class;
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GimpUndoClass *undo_class;
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object_class = G_OBJECT_CLASS (klass);
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gimp_object_class = GIMP_OBJECT_CLASS (klass);
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undo_class = GIMP_UNDO_CLASS (klass);
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parent_class = g_type_class_peek_parent (klass);
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object_class->finalize = gimp_undo_stack_finalize;
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gimp_object_class->get_memsize = gimp_undo_stack_get_memsize;
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undo_class->pop = gimp_undo_stack_pop;
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undo_class->free = gimp_undo_stack_free;
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}
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static void
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gimp_undo_stack_init (GimpUndoStack *stack)
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{
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stack->undos = gimp_list_new (GIMP_TYPE_UNDO,
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GIMP_CONTAINER_POLICY_STRONG);
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}
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static void
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gimp_undo_stack_finalize (GObject *object)
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{
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GimpUndoStack *stack;
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stack = GIMP_UNDO_STACK (object);
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if (stack->undos)
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{
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g_object_unref (stack->undos);
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stack->undos = NULL;
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}
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G_OBJECT_CLASS (parent_class)->finalize (object);
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}
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static gsize
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gimp_undo_stack_get_memsize (GimpObject *object)
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{
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GimpUndoStack *stack;
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gsize memsize = 0;
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stack = GIMP_UNDO_STACK (object);
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if (stack->undos)
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memsize += gimp_object_get_memsize (GIMP_OBJECT (stack->undos));
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return memsize + GIMP_OBJECT_CLASS (parent_class)->get_memsize (object);
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}
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static void
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gimp_undo_stack_pop (GimpUndo *undo,
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GimpUndoMode undo_mode,
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GimpUndoAccumulator *accum)
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{
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GimpUndoStack *stack;
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GList *list;
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stack = GIMP_UNDO_STACK (undo);
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for (list = GIMP_LIST (stack->undos)->list;
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list;
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list = g_list_next (list))
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{
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GimpUndo *child;
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child = GIMP_UNDO (list->data);
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gimp_undo_pop (child, undo_mode, accum);
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}
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}
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static void
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gimp_undo_stack_free (GimpUndo *undo,
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GimpUndoMode undo_mode)
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{
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GimpUndoStack *stack;
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GList *list;
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stack = GIMP_UNDO_STACK (undo);
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for (list = GIMP_LIST (stack->undos)->list;
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list;
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list = g_list_next (list))
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{
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GimpUndo *child;
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child = GIMP_UNDO (list->data);
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gimp_undo_free (child, undo_mode);
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g_object_unref (child);
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}
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while (GIMP_LIST (stack->undos)->list)
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gimp_container_remove (GIMP_CONTAINER (stack->undos),
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GIMP_OBJECT (GIMP_LIST (stack->undos)->list->data));
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}
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GimpUndoStack *
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gimp_undo_stack_new (GimpImage *gimage)
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{
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GimpUndoStack *stack;
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g_return_val_if_fail (GIMP_IS_IMAGE (gimage), NULL);
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stack = GIMP_UNDO_STACK (g_object_new (GIMP_TYPE_UNDO_STACK, NULL));
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GIMP_UNDO (stack)->gimage = gimage;
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return stack;
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}
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void
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gimp_undo_stack_push_undo (GimpUndoStack *stack,
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GimpUndo *undo)
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{
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g_return_if_fail (GIMP_IS_UNDO_STACK (stack));
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g_return_if_fail (GIMP_IS_UNDO (undo));
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gimp_container_add (GIMP_CONTAINER (stack->undos), GIMP_OBJECT (undo));
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}
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GimpUndo *
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gimp_undo_stack_pop_undo (GimpUndoStack *stack,
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GimpUndoMode undo_mode,
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GimpUndoAccumulator *accum)
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{
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GimpUndo *undo;
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g_return_val_if_fail (GIMP_IS_UNDO_STACK (stack), NULL);
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g_return_val_if_fail (accum != NULL, NULL);
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undo = (GimpUndo *)
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gimp_container_get_child_by_index (GIMP_CONTAINER (stack->undos), 0);
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if (undo)
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{
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gimp_container_remove (GIMP_CONTAINER (stack->undos), GIMP_OBJECT (undo));
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gimp_undo_pop (undo, undo_mode, accum);
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return undo;
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}
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return NULL;
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}
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GimpUndo *
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gimp_undo_stack_free_bottom (GimpUndoStack *stack,
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GimpUndoMode undo_mode)
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{
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GimpUndo *undo;
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gint n_children;
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g_return_val_if_fail (GIMP_IS_UNDO_STACK (stack), NULL);
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n_children = gimp_container_num_children (GIMP_CONTAINER (stack->undos));
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undo = (GimpUndo *)
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gimp_container_get_child_by_index (GIMP_CONTAINER (stack->undos),
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n_children - 1);
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if (undo)
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{
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gimp_container_remove (GIMP_CONTAINER (stack->undos), GIMP_OBJECT (undo));
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gimp_undo_free (undo, undo_mode);
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return undo;
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}
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return NULL;
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}
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GimpUndo *
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gimp_undo_stack_peek (GimpUndoStack *stack)
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{
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GimpObject *object;
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g_return_val_if_fail (GIMP_IS_UNDO_STACK (stack), NULL);
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object = gimp_container_get_child_by_index (GIMP_CONTAINER (stack->undos), 0);
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return (object ? GIMP_UNDO (object) : NULL);
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}
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