PIKApp/app/core/pikachannelundo.c

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2023-09-26 00:35:21 +02:00
/* PIKA - Photo and Image Kooker Application
* a rebranding of The GNU Image Manipulation Program (created with heckimp)
* A derived work which may be trivial. However, any changes may be (C)2023 by Aldercone Studio
*
* Original copyright, applying to most contents (license remains unchanged):
* 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 "libpikabase/pikabase.h"
#include "core-types.h"
#include "pikaimage.h"
#include "pikachannel.h"
#include "pikachannelundo.h"
enum
{
PROP_0,
PROP_PREV_PARENT,
PROP_PREV_POSITION,
PROP_PREV_CHANNELS
};
static void pika_channel_undo_constructed (GObject *object);
static void pika_channel_undo_finalize (GObject *object);
static void pika_channel_undo_set_property (GObject *object,
guint property_id,
const GValue *value,
GParamSpec *pspec);
static void pika_channel_undo_get_property (GObject *object,
guint property_id,
GValue *value,
GParamSpec *pspec);
static gint64 pika_channel_undo_get_memsize (PikaObject *object,
gint64 *gui_size);
static void pika_channel_undo_pop (PikaUndo *undo,
PikaUndoMode undo_mode,
PikaUndoAccumulator *accum);
G_DEFINE_TYPE (PikaChannelUndo, pika_channel_undo, PIKA_TYPE_ITEM_UNDO)
#define parent_class pika_channel_undo_parent_class
static void
pika_channel_undo_class_init (PikaChannelUndoClass *klass)
{
GObjectClass *object_class = G_OBJECT_CLASS (klass);
PikaObjectClass *pika_object_class = PIKA_OBJECT_CLASS (klass);
PikaUndoClass *undo_class = PIKA_UNDO_CLASS (klass);
object_class->constructed = pika_channel_undo_constructed;
object_class->finalize = pika_channel_undo_finalize;
object_class->set_property = pika_channel_undo_set_property;
object_class->get_property = pika_channel_undo_get_property;
pika_object_class->get_memsize = pika_channel_undo_get_memsize;
undo_class->pop = pika_channel_undo_pop;
g_object_class_install_property (object_class, PROP_PREV_PARENT,
g_param_spec_object ("prev-parent",
NULL, NULL,
PIKA_TYPE_CHANNEL,
PIKA_PARAM_READWRITE |
G_PARAM_CONSTRUCT_ONLY));
g_object_class_install_property (object_class, PROP_PREV_POSITION,
g_param_spec_int ("prev-position",
NULL, NULL,
0, G_MAXINT, 0,
PIKA_PARAM_READWRITE |
G_PARAM_CONSTRUCT_ONLY));
g_object_class_install_property (object_class, PROP_PREV_CHANNELS,
g_param_spec_pointer ("prev-channels",
NULL, NULL,
PIKA_PARAM_READWRITE |
G_PARAM_CONSTRUCT_ONLY));
}
static void
pika_channel_undo_init (PikaChannelUndo *undo)
{
undo->prev_channels = NULL;
}
static void
pika_channel_undo_constructed (GObject *object)
{
G_OBJECT_CLASS (parent_class)->constructed (object);
pika_assert (PIKA_IS_CHANNEL (PIKA_ITEM_UNDO (object)->item));
}
static void
pika_channel_undo_finalize (GObject *object)
{
PikaChannelUndo *channel_undo = PIKA_CHANNEL_UNDO (object);
g_clear_pointer (&channel_undo->prev_channels, g_list_free);
G_OBJECT_CLASS (parent_class)->finalize (object);
}
static void
pika_channel_undo_set_property (GObject *object,
guint property_id,
const GValue *value,
GParamSpec *pspec)
{
PikaChannelUndo *channel_undo = PIKA_CHANNEL_UNDO (object);
switch (property_id)
{
case PROP_PREV_PARENT:
channel_undo->prev_parent = g_value_get_object (value);
break;
case PROP_PREV_POSITION:
channel_undo->prev_position = g_value_get_int (value);
break;
case PROP_PREV_CHANNELS:
channel_undo->prev_channels = g_list_copy (g_value_get_pointer (value));
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
break;
}
}
static void
pika_channel_undo_get_property (GObject *object,
guint property_id,
GValue *value,
GParamSpec *pspec)
{
PikaChannelUndo *channel_undo = PIKA_CHANNEL_UNDO (object);
switch (property_id)
{
case PROP_PREV_PARENT:
g_value_set_object (value, channel_undo->prev_parent);
break;
case PROP_PREV_POSITION:
g_value_set_int (value, channel_undo->prev_position);
break;
case PROP_PREV_CHANNELS:
g_value_set_pointer (value, channel_undo->prev_channels);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
break;
}
}
static gint64
pika_channel_undo_get_memsize (PikaObject *object,
gint64 *gui_size)
{
PikaItemUndo *item_undo = PIKA_ITEM_UNDO (object);
gint64 memsize = 0;
if (! pika_item_is_attached (item_undo->item))
memsize += pika_object_get_memsize (PIKA_OBJECT (item_undo->item),
gui_size);
return memsize + PIKA_OBJECT_CLASS (parent_class)->get_memsize (object,
gui_size);
}
static void
pika_channel_undo_pop (PikaUndo *undo,
PikaUndoMode undo_mode,
PikaUndoAccumulator *accum)
{
PikaChannelUndo *channel_undo = PIKA_CHANNEL_UNDO (undo);
PikaChannel *channel = PIKA_CHANNEL (PIKA_ITEM_UNDO (undo)->item);
PIKA_UNDO_CLASS (parent_class)->pop (undo, undo_mode, accum);
if ((undo_mode == PIKA_UNDO_MODE_UNDO &&
undo->undo_type == PIKA_UNDO_CHANNEL_ADD) ||
(undo_mode == PIKA_UNDO_MODE_REDO &&
undo->undo_type == PIKA_UNDO_CHANNEL_REMOVE))
{
/* remove channel */
/* record the current parent and position */
channel_undo->prev_parent = pika_channel_get_parent (channel);
channel_undo->prev_position = pika_item_get_index (PIKA_ITEM (channel));
pika_image_remove_channel (undo->image, channel, FALSE,
channel_undo->prev_channels);
}
else
{
/* restore channel */
/* record the active channel */
g_clear_pointer (&channel_undo->prev_channels, g_list_free);
channel_undo->prev_channels = g_list_copy (pika_image_get_selected_channels (undo->image));
pika_image_add_channel (undo->image, channel,
channel_undo->prev_parent,
channel_undo->prev_position, FALSE);
}
}