/* GIMP - The GNU Image Manipulation Program
 * Copyright (C) 1995-1999 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 2 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, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
 */

#include "config.h"

#include <gtk/gtk.h>

#include "libgimpbase/gimpbase.h"
#include "libgimpwidgets/gimpwidgets.h"

#include "widgets-types.h"

#include "gimpwidgets-constructors.h"

#include "gimp-intl.h"


/*  local function prototypes  */

static gboolean   gimp_paint_mode_menu_separator_func (GtkTreeModel *model,
                                                       GtkTreeIter  *iter,
                                                       gpointer      data);


/*  public functions  */

static void
gimp_enum_store_insert_value_after (GimpEnumStore *store,
                                    gint           after,
                                    gint           insert_value)
{
  GtkTreeIter iter;

  g_return_if_fail (GIMP_IS_ENUM_STORE (store));

  if (gimp_int_store_lookup_by_value (GTK_TREE_MODEL (store),
                                      after, &iter))
    {
      GEnumValue *enum_value;

      enum_value = g_enum_get_value (store->enum_class, insert_value);

      if (enum_value)
        {
          GtkTreeIter  value_iter;
          const gchar *desc;

          gtk_list_store_insert_after (GTK_LIST_STORE (store),
                                       &value_iter, &iter);

          desc = gimp_enum_value_get_desc (store->enum_class, enum_value);

          gtk_list_store_set (GTK_LIST_STORE (store), &value_iter,
                              GIMP_INT_STORE_VALUE, enum_value->value,
                              GIMP_INT_STORE_LABEL, desc,
                              -1);
        }
    }
}

static void
gimp_int_store_insert_separator_after (GimpIntStore *store,
                                       gint          after,
                                       gint          separator_value)
{
  GtkTreeIter iter;

  g_return_if_fail (GIMP_IS_INT_STORE (store));

  if (gimp_int_store_lookup_by_value (GTK_TREE_MODEL (store),
                                      after, &iter))
    {
      GtkTreeIter sep_iter;

      gtk_list_store_insert_after (GTK_LIST_STORE (store),
                                   &sep_iter, &iter);
      gtk_list_store_set (GTK_LIST_STORE (store), &sep_iter,
                          GIMP_INT_STORE_VALUE, separator_value,
                          -1);
    }
}

GtkWidget *
gimp_paint_mode_menu_new (gboolean with_behind_mode,
                          gboolean with_replace_modes)
{
  GtkListStore *store;
  GtkWidget    *combo;

  store = gimp_enum_store_new_with_values (GIMP_TYPE_LAYER_MODE_EFFECTS,
                                           21,
                                           GIMP_NORMAL_MODE,
                                           GIMP_DISSOLVE_MODE,

                                           GIMP_MULTIPLY_MODE,
                                           GIMP_DIVIDE_MODE,
                                           GIMP_SCREEN_MODE,
                                           GIMP_OVERLAY_MODE,

                                           GIMP_DODGE_MODE,
                                           GIMP_BURN_MODE,
                                           GIMP_HARDLIGHT_MODE,
                                           GIMP_SOFTLIGHT_MODE,
                                           GIMP_GRAIN_EXTRACT_MODE,
                                           GIMP_GRAIN_MERGE_MODE,

                                           GIMP_DIFFERENCE_MODE,
                                           GIMP_ADDITION_MODE,
                                           GIMP_SUBTRACT_MODE,
                                           GIMP_DARKEN_ONLY_MODE,
                                           GIMP_LIGHTEN_ONLY_MODE,

                                           GIMP_HUE_MODE,
                                           GIMP_SATURATION_MODE,
                                           GIMP_COLOR_MODE,
                                           GIMP_VALUE_MODE);

  gimp_int_store_insert_separator_after (GIMP_INT_STORE (store),
                                         GIMP_DISSOLVE_MODE, -1);
  gimp_int_store_insert_separator_after (GIMP_INT_STORE (store),
                                         GIMP_OVERLAY_MODE, -1);
  gimp_int_store_insert_separator_after (GIMP_INT_STORE (store),
                                         GIMP_GRAIN_MERGE_MODE, -1);
  gimp_int_store_insert_separator_after (GIMP_INT_STORE (store),
                                         GIMP_LIGHTEN_ONLY_MODE, -1);

  if (with_behind_mode)
    {
      gimp_enum_store_insert_value_after (GIMP_ENUM_STORE (store),
                                          GIMP_DISSOLVE_MODE,
                                          GIMP_BEHIND_MODE);
      gimp_enum_store_insert_value_after (GIMP_ENUM_STORE (store),
                                          GIMP_BEHIND_MODE,
                                          GIMP_COLOR_ERASE_MODE);
    }

  if (with_replace_modes)
    {
      gimp_enum_store_insert_value_after (GIMP_ENUM_STORE (store),
                                          GIMP_NORMAL_MODE,
                                          GIMP_REPLACE_MODE);
      gimp_enum_store_insert_value_after (GIMP_ENUM_STORE (store),
                                          GIMP_COLOR_ERASE_MODE,
                                          GIMP_ERASE_MODE);
      gimp_enum_store_insert_value_after (GIMP_ENUM_STORE (store),
                                          GIMP_ERASE_MODE,
                                          GIMP_ANTI_ERASE_MODE);
    }

  combo = gimp_enum_combo_box_new_with_model (GIMP_ENUM_STORE (store));
  g_object_unref (store);

  gtk_combo_box_set_row_separator_func (GTK_COMBO_BOX (combo),
                                        gimp_paint_mode_menu_separator_func,
                                        GINT_TO_POINTER (-1),
                                        NULL);

  return combo;
}


/*  private functions  */

static gboolean
gimp_paint_mode_menu_separator_func (GtkTreeModel *model,
                                     GtkTreeIter  *iter,
                                     gpointer      data)
{
  gint value;

  gtk_tree_model_get (model, iter, GIMP_INT_STORE_VALUE, &value, -1);

  return value == GPOINTER_TO_INT (data);
}