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Diffstat (limited to 'app/core/gimpundostack.c')
| -rw-r--r-- | app/core/gimpundostack.c | 208 |
1 files changed, 208 insertions, 0 deletions
diff --git a/app/core/gimpundostack.c b/app/core/gimpundostack.c new file mode 100644 index 0000000..666ed9b --- /dev/null +++ b/app/core/gimpundostack.c @@ -0,0 +1,208 @@ +/* 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 <https://www.gnu.org/licenses/>. + */ + +#include "config.h" + +#include <gdk-pixbuf/gdk-pixbuf.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); + + g_clear_object (&stack->undos); + + 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)->queue->head; + 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)->queue->head; + 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); +} |