/* 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 "base/tile-manager.h"

#include "gimpimage.h"
#include "gimpdrawable.h"
#include "gimpdrawablemodundo.h"


enum
{
  PROP_0,
  PROP_COPY_TILES
};


static GObject * gimp_drawable_mod_undo_constructor  (GType                  type,
                                                      guint                  n_params,
                                                      GObjectConstructParam *params);
static void      gimp_drawable_mod_undo_set_property (GObject               *object,
                                                      guint                  property_id,
                                                      const GValue          *value,
                                                      GParamSpec            *pspec);
static void      gimp_drawable_mod_undo_get_property (GObject               *object,
                                                      guint                  property_id,
                                                      GValue                *value,
                                                      GParamSpec            *pspec);


static gint64    gimp_drawable_mod_undo_get_memsize  (GimpObject            *object,
                                                      gint64                *gui_size);

static void      gimp_drawable_mod_undo_pop          (GimpUndo              *undo,
                                                      GimpUndoMode           undo_mode,
                                                      GimpUndoAccumulator   *accum);
static void      gimp_drawable_mod_undo_free         (GimpUndo              *undo,
                                                      GimpUndoMode           undo_mode);


G_DEFINE_TYPE (GimpDrawableModUndo, gimp_drawable_mod_undo, GIMP_TYPE_ITEM_UNDO)

#define parent_class gimp_drawable_mod_undo_parent_class


static void
gimp_drawable_mod_undo_class_init (GimpDrawableModUndoClass *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->constructor      = gimp_drawable_mod_undo_constructor;
  object_class->set_property     = gimp_drawable_mod_undo_set_property;
  object_class->get_property     = gimp_drawable_mod_undo_get_property;

  gimp_object_class->get_memsize = gimp_drawable_mod_undo_get_memsize;

  undo_class->pop                = gimp_drawable_mod_undo_pop;
  undo_class->free               = gimp_drawable_mod_undo_free;

  g_object_class_install_property (object_class, PROP_COPY_TILES,
                                   g_param_spec_boolean ("copy-tiles", NULL, NULL,
                                                         FALSE,
                                                         GIMP_PARAM_READWRITE |
                                                         G_PARAM_CONSTRUCT_ONLY));
}

static void
gimp_drawable_mod_undo_init (GimpDrawableModUndo *undo)
{
}

static GObject *
gimp_drawable_mod_undo_constructor (GType                  type,
                                    guint                  n_params,
                                    GObjectConstructParam *params)
{
  GObject             *object;
  GimpDrawableModUndo *drawable_mod_undo;
  GimpItem            *item;
  GimpDrawable        *drawable;

  object = G_OBJECT_CLASS (parent_class)->constructor (type, n_params, params);

  drawable_mod_undo = GIMP_DRAWABLE_MOD_UNDO (object);

  g_assert (GIMP_IS_DRAWABLE (GIMP_ITEM_UNDO (object)->item));

  item     = GIMP_ITEM_UNDO (object)->item;
  drawable = GIMP_DRAWABLE (item);

  if (drawable_mod_undo->copy_tiles)
    {
      drawable_mod_undo->tiles =
        tile_manager_duplicate (gimp_drawable_get_tiles (drawable));
    }
  else
    {
      drawable_mod_undo->tiles =
        tile_manager_ref (gimp_drawable_get_tiles (drawable));
    }

  drawable_mod_undo->type = gimp_drawable_type (drawable);

  gimp_item_get_offset (item,
                        &drawable_mod_undo->offset_x,
                        &drawable_mod_undo->offset_y);

  return object;
}

static void
gimp_drawable_mod_undo_set_property (GObject      *object,
                                     guint         property_id,
                                     const GValue *value,
                                     GParamSpec   *pspec)
{
  GimpDrawableModUndo *drawable_mod_undo = GIMP_DRAWABLE_MOD_UNDO (object);

  switch (property_id)
    {
    case PROP_COPY_TILES:
      drawable_mod_undo->copy_tiles = g_value_get_boolean (value);
      break;

    default:
      G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
      break;
    }
}

static void
gimp_drawable_mod_undo_get_property (GObject    *object,
                                     guint       property_id,
                                     GValue     *value,
                                     GParamSpec *pspec)
{
  GimpDrawableModUndo *drawable_mod_undo = GIMP_DRAWABLE_MOD_UNDO (object);

  switch (property_id)
    {
    case PROP_COPY_TILES:
      g_value_set_boolean (value, drawable_mod_undo->copy_tiles);
      break;

    default:
      G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
      break;
    }
}

static gint64
gimp_drawable_mod_undo_get_memsize (GimpObject *object,
                                    gint64     *gui_size)
{
  GimpDrawableModUndo *drawable_mod_undo = GIMP_DRAWABLE_MOD_UNDO (object);
  gint64               memsize           = 0;

  memsize += tile_manager_get_memsize (drawable_mod_undo->tiles, FALSE);

  return memsize + GIMP_OBJECT_CLASS (parent_class)->get_memsize (object,
                                                                  gui_size);
}

static void
gimp_drawable_mod_undo_pop (GimpUndo            *undo,
                            GimpUndoMode         undo_mode,
                            GimpUndoAccumulator *accum)
{
  GimpDrawableModUndo *drawable_mod_undo = GIMP_DRAWABLE_MOD_UNDO (undo);
  GimpDrawable        *drawable          = GIMP_DRAWABLE (GIMP_ITEM_UNDO (undo)->item);
  TileManager         *tiles;
  GimpImageType        type;
  gint                 offset_x;
  gint                 offset_y;

  GIMP_UNDO_CLASS (parent_class)->pop (undo, undo_mode, accum);

  tiles    = drawable_mod_undo->tiles;
  type     = drawable_mod_undo->type;
  offset_x = drawable_mod_undo->offset_x;
  offset_y = drawable_mod_undo->offset_y;

  drawable_mod_undo->tiles = tile_manager_ref (gimp_drawable_get_tiles (drawable));
  drawable_mod_undo->type  = gimp_drawable_type (drawable);

  gimp_item_get_offset (GIMP_ITEM (drawable),
                        &drawable_mod_undo->offset_x,
                        &drawable_mod_undo->offset_y);

  gimp_drawable_set_tiles_full (drawable, FALSE, NULL,
                                tiles, type, offset_x, offset_y);
  tile_manager_unref (tiles);
}

static void
gimp_drawable_mod_undo_free (GimpUndo     *undo,
                             GimpUndoMode  undo_mode)
{
  GimpDrawableModUndo *drawable_mod_undo = GIMP_DRAWABLE_MOD_UNDO (undo);

  if (drawable_mod_undo->tiles)
    {
      tile_manager_unref (drawable_mod_undo->tiles);
      drawable_mod_undo->tiles = NULL;
    }

  GIMP_UNDO_CLASS (parent_class)->free (undo, undo_mode);
}
