/* The GIMP -- an 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 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 <glib-object.h>

#include "core-types.h"

#include "gimpcontext.h"
#include "gimpimage.h"
#include "gimpimage-item-list.h"
#include "gimpimage-undo.h"
#include "gimpitem.h"
#include "gimplist.h"
#include "gimpprogress.h"

#include "gimp-intl.h"


/*  public functions  */

void
gimp_image_item_list_translate (GimpImage *image,
                                GList     *list,
                                gint       offset_x,
                                gint       offset_y,
                                gboolean   push_undo)
{
  g_return_if_fail (GIMP_IS_IMAGE (image));

  if (list)
    {
      GList *l;

      if (push_undo)
        gimp_image_undo_group_start (image, GIMP_UNDO_GROUP_ITEM_DISPLACE,
                                     _("Translate Items"));

      for (l = list; l; l = g_list_next (l))
        gimp_item_translate (GIMP_ITEM (l->data),
                             offset_x, offset_y, push_undo);

      if (push_undo)
        gimp_image_undo_group_end (image);
    }
}

void
gimp_image_item_list_flip (GimpImage           *image,
                           GList               *list,
                           GimpContext         *context,
                           GimpOrientationType  flip_type,
                           gdouble              axis,
                           gboolean             clip_result)
{
  g_return_if_fail (GIMP_IS_IMAGE (image));
  g_return_if_fail (GIMP_IS_CONTEXT (context));

  if (list)
    {
      GList *l;

      gimp_image_undo_group_start (image, GIMP_UNDO_GROUP_TRANSFORM,
                                   _("Flip Items"));

      for (l = list; l; l = g_list_next (l))
        gimp_item_flip (GIMP_ITEM (l->data), context,
                        flip_type, axis, clip_result);

      gimp_image_undo_group_end (image);
    }
}

void
gimp_image_item_list_rotate (GimpImage        *image,
                             GList            *list,
                             GimpContext      *context,
                             GimpRotationType  rotate_type,
                             gdouble           center_x,
                             gdouble           center_y,
                             gboolean          clip_result)
{
  g_return_if_fail (GIMP_IS_IMAGE (image));
  g_return_if_fail (GIMP_IS_CONTEXT (context));

  if (list)
    {
      GList *l;

      gimp_image_undo_group_start (image, GIMP_UNDO_GROUP_TRANSFORM,
                                   _("Rotate Items"));

      for (l = list; l; l = g_list_next (l))
        gimp_item_rotate (GIMP_ITEM (l->data), context,
                          rotate_type, center_x, center_y, clip_result);

      gimp_image_undo_group_end (image);
    }
}

void
gimp_image_item_list_transform (GimpImage              *image,
                                GList                  *list,
                                GimpContext            *context,
                                const GimpMatrix3      *matrix,
                                GimpTransformDirection  direction,
                                GimpInterpolationType   interpolation_type,
                                gboolean                supersample,
                                gint                    recursion_level,
                                gboolean                clip_result,
                                GimpProgress           *progress)
{
  g_return_if_fail (GIMP_IS_IMAGE (image));
  g_return_if_fail (GIMP_IS_CONTEXT (context));
  g_return_if_fail (progress == NULL || GIMP_IS_PROGRESS (progress));

  if (list)
    {
      GList *l;

      gimp_image_undo_group_start (image, GIMP_UNDO_GROUP_TRANSFORM,
                                   _("Transform Items"));

      for (l = list; l; l = g_list_next (l))
        gimp_item_transform (GIMP_ITEM (l->data), context,
                             matrix, direction,
                             interpolation_type,
                             supersample, recursion_level,
                             clip_result, progress);

      gimp_image_undo_group_end (image);
    }
}

/**
 * gimp_image_item_list_get_list:
 * @item:  A linked @item.
 * @which: Which items to return.
 *
 * This function returns a #GList og #GimpItem's for which the
 * "linked" property is #TRUE. Note that the passed in @item
 * must be linked too.
 *
 * Return value: The list of linked items, excluding the passed @item.
 **/
GList *
gimp_image_item_list_get_list (GimpImage        *image,
                               GimpItem         *exclude,
                               GimpItemTypeMask  type,
                               GimpItemSet       set)
{
  GList *list;
  GList *return_list = NULL;

  g_return_val_if_fail (GIMP_IS_IMAGE (image), NULL);
  g_return_val_if_fail (exclude == NULL || GIMP_IS_ITEM (exclude), NULL);

  if (type & GIMP_ITEM_TYPE_LAYERS)
    {
      for (list = GIMP_LIST (image->layers)->list;
           list;
           list = g_list_next (list))
        {
          GimpItem *item = list->data;

          if (item != exclude && gimp_item_is_in_set (item, set))
            return_list = g_list_prepend (return_list, item);
        }
    }

  if (type & GIMP_ITEM_TYPE_CHANNELS)
    {
      for (list = GIMP_LIST (image->channels)->list;
           list;
           list = g_list_next (list))
        {
          GimpItem *item = list->data;

          if (item != exclude && gimp_item_is_in_set (item, set))
            return_list = g_list_prepend (return_list, item);
        }
    }

  if (type & GIMP_ITEM_TYPE_VECTORS)
    {
      for (list = GIMP_LIST (image->vectors)->list;
           list;
           list = g_list_next (list))
        {
          GimpItem *item = list->data;

          if (item != exclude && gimp_item_is_in_set (item, set))
            return_list = g_list_prepend (return_list, item);
        }
    }

  return g_list_reverse (return_list);
}