/* GIMP - The GNU Image Manipulation Program
 * Copyright (C) 1995 Spencer Kimball and Peter Mattis
 *
 * gimpfuzzyselecttool.c
 *
 * 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 <string.h>

#include <gegl.h>
#include <gtk/gtk.h>

#include "libgimpwidgets/gimpwidgets.h"

#include "tools-types.h"

#include "core/gimpimage.h"
#include "core/gimpitem.h"
#include "core/gimppickable.h"
#include "core/gimppickable-contiguous-region.h"

#include "widgets/gimphelp-ids.h"

#include "display/gimpdisplay.h"

#include "gimpfuzzyselecttool.h"
#include "gimpregionselectoptions.h"
#include "gimptoolcontrol.h"

#include "gimp-intl.h"


static GeglBuffer * gimp_fuzzy_select_tool_get_mask (GimpRegionSelectTool *region_select,
                                                     GimpDisplay          *display);


G_DEFINE_TYPE (GimpFuzzySelectTool, gimp_fuzzy_select_tool,
               GIMP_TYPE_REGION_SELECT_TOOL)

#define parent_class gimp_fuzzy_select_tool_parent_class


void
gimp_fuzzy_select_tool_register (GimpToolRegisterCallback  callback,
                                 gpointer                  data)
{
  (* callback) (GIMP_TYPE_FUZZY_SELECT_TOOL,
                GIMP_TYPE_REGION_SELECT_OPTIONS,
                gimp_region_select_options_gui,
                0,
                "gimp-fuzzy-select-tool",
                _("Fuzzy Select"),
                _("Fuzzy Select Tool: Select a contiguous region on the basis of color"),
                N_("Fu_zzy Select"), "U",
                NULL, GIMP_HELP_TOOL_FUZZY_SELECT,
                GIMP_ICON_TOOL_FUZZY_SELECT,
                data);
}

static void
gimp_fuzzy_select_tool_class_init (GimpFuzzySelectToolClass *klass)
{
  GimpRegionSelectToolClass *region_class;

  region_class = GIMP_REGION_SELECT_TOOL_CLASS (klass);

  region_class->undo_desc = C_("command", "Fuzzy Select");
  region_class->get_mask  = gimp_fuzzy_select_tool_get_mask;
}

static void
gimp_fuzzy_select_tool_init (GimpFuzzySelectTool *fuzzy_select)
{
  GimpTool *tool = GIMP_TOOL (fuzzy_select);

  gimp_tool_control_set_tool_cursor (tool->control,
                                     GIMP_TOOL_CURSOR_FUZZY_SELECT);
}

static GeglBuffer *
gimp_fuzzy_select_tool_get_mask (GimpRegionSelectTool *region_select,
                                 GimpDisplay          *display)
{
  GimpTool                *tool        = GIMP_TOOL (region_select);
  GimpSelectionOptions    *sel_options = GIMP_SELECTION_TOOL_GET_OPTIONS (tool);
  GimpRegionSelectOptions *options     = GIMP_REGION_SELECT_TOOL_GET_OPTIONS (tool);
  GimpImage               *image       = gimp_display_get_image (display);
  GimpDrawable            *drawable    = gimp_image_get_active_drawable (image);
  GimpPickable            *pickable;
  gint                     x, y;

  x = region_select->x;
  y = region_select->y;

  if (! options->sample_merged)
    {
      gint off_x, off_y;

      gimp_item_get_offset (GIMP_ITEM (drawable), &off_x, &off_y);

      x -= off_x;
      y -= off_y;

      pickable = GIMP_PICKABLE (drawable);
    }
  else
    {
      pickable = GIMP_PICKABLE (image);
    }

  return gimp_pickable_contiguous_region_by_seed (pickable,
                                                  sel_options->antialias,
                                                  options->threshold / 255.0,
                                                  options->select_transparent,
                                                  options->select_criterion,
                                                  options->diagonal_neighbors,
                                                  x, y);
}