gimp/app/actions/drawable-commands.c

/* 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 <https://www.gnu.org/licenses/>.
 */

#include "config.h"

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

#include "libgimpwidgets/gimpwidgets.h"

#include "actions-types.h"

#include "core/gimp.h"
#include "core/gimpdrawable-equalize.h"
#include "core/gimpdrawable-levels.h"
#include "core/gimpdrawable-operation.h"
#include "core/gimpimage.h"
#include "core/gimpimage-undo.h"
#include "core/gimpitem-linked.h"
#include "core/gimpitemundo.h"
#include "core/gimplayermask.h"
#include "core/gimpprogress.h"

#include "dialogs/dialogs.h"

#include "actions.h"
#include "drawable-commands.h"

#include "gimp-intl.h"


/*  public functions  */

void
drawable_equalize_cmd_callback (GimpAction *action,
                                GVariant   *value,
                                gpointer    data)
{
  GimpImage    *image;
  GimpDrawable *drawable;
  return_if_no_drawable (image, drawable, data);

  gimp_drawable_equalize (drawable, TRUE);
  gimp_image_flush (image);
}

void
drawable_levels_stretch_cmd_callback (GimpAction *action,
                                      GVariant   *value,
                                      gpointer    data)
{
  GimpImage    *image;
  GimpDrawable *drawable;
  GimpDisplay  *display;
  GtkWidget    *widget;
  return_if_no_drawable (image, drawable, data);
  return_if_no_display (display, data);
  return_if_no_widget (widget, data);

  if (! gimp_drawable_is_rgb (drawable))
    {
      gimp_message_literal (image->gimp,
                            G_OBJECT (widget), GIMP_MESSAGE_WARNING,
                            _("White Balance operates only on RGB color "
                              "layers."));
      return;
    }

  gimp_drawable_levels_stretch (drawable, GIMP_PROGRESS (display));
  gimp_image_flush (image);
}

void
drawable_linked_cmd_callback (GimpAction *action,
                              GVariant   *value,
                              gpointer    data)
{
  GimpImage    *image;
  GList        *drawables;
  GList        *iter;
  GimpUndo     *undo      = NULL;
  gboolean      push_undo = TRUE;
  gboolean      linked;

  return_if_no_drawables (image, drawables, data);

  linked = g_variant_get_boolean (value);

  if (GIMP_IS_LAYER_MASK (drawables->data))
    {
      GimpLayerMask *mask = GIMP_LAYER_MASK (drawables->data);

      g_list_free (drawables);
      drawables = g_list_prepend (NULL, gimp_layer_mask_get_layer (mask));
    }

  for (iter = drawables; iter; iter = iter->next)
    {
      if (linked && gimp_item_get_linked (iter->data))
        {
          /* If any of the drawables are already linked, we don't
           * toggle the link. This prevents the SET_ACTIVE() in
           * drawables-actions.c to toggle links unexpectedly.
           */
          g_list_free (drawables);
          return;
        }
    }

  for (iter = drawables; iter; iter = iter->next)
    if (linked != gimp_item_get_linked (iter->data))
      break;

  if (! iter)
    {
      g_list_free (drawables);
      return;
    }

  if (g_list_length (drawables) == 1)
    {
      undo = gimp_image_undo_can_compress (image, GIMP_TYPE_ITEM_UNDO,
                                           GIMP_UNDO_ITEM_LINKED);


      if (undo && GIMP_ITEM_UNDO (undo)->item == GIMP_ITEM (drawables->data))
        push_undo = FALSE;
    }
  else
    {
      /* TODO: undo groups cannot be compressed so far. */
      gimp_image_undo_group_start (image,
                                   GIMP_UNDO_GROUP_ITEM_LINKED,
                                   "Link/Unlink items");
    }

  for (; iter; iter = iter->next)
    if (linked != gimp_item_get_linked (iter->data))
      gimp_item_set_linked (iter->data, linked, push_undo);

  if (g_list_length (drawables) != 1)
    gimp_image_undo_group_end (image);

  gimp_image_flush (image);
}

void
drawable_visible_cmd_callback (GimpAction *action,
                               GVariant   *value,
                               gpointer    data)
{
  GimpImage    *image;
  GList        *drawables;
  GList        *iter;
  GimpUndo     *undo;
  gboolean      push_undo = TRUE;
  gboolean      visible;

  return_if_no_drawables (image, drawables, data);

  visible = g_variant_get_boolean (value);

  if (GIMP_IS_LAYER_MASK (drawables->data))
    {
      GimpLayerMask *mask = GIMP_LAYER_MASK (drawables->data);

      g_list_free (drawables);
      drawables = g_list_prepend (NULL, gimp_layer_mask_get_layer (mask));
    }

  for (iter = drawables; iter; iter = iter->next)
    {
      if (visible && gimp_item_get_visible (iter->data))
        {
          /* If any of the drawables are already visible, we don't
           * toggle the selection visibility. This prevents the
           * SET_ACTIVE() in drawables-actions.c to toggle visibility
           * unexpectedly.
           */
          g_list_free (drawables);
          return;
        }
    }

  for (iter = drawables; iter; iter = iter->next)
    if (visible != gimp_item_get_visible (iter->data))
      break;

  if (! iter)
    {
      g_list_free (drawables);
      return;
    }

  if (g_list_length (drawables) == 1)
    {
      undo = gimp_image_undo_can_compress (image, GIMP_TYPE_ITEM_UNDO,
                                           GIMP_UNDO_ITEM_VISIBILITY);

      if (undo && GIMP_ITEM_UNDO (undo)->item == GIMP_ITEM (drawables->data))
        push_undo = FALSE;
    }
  else
    {
      /* TODO: undo groups cannot be compressed so far. */
      gimp_image_undo_group_start (image,
                                   GIMP_UNDO_GROUP_ITEM_VISIBILITY,
                                   "Item visibility");
    }

  for (; iter; iter = iter->next)
    gimp_item_set_visible (iter->data, visible, push_undo);

  if (g_list_length (drawables) != 1)
    gimp_image_undo_group_end (image);

  gimp_image_flush (image);
}

void
drawable_lock_content_cmd_callback (GimpAction *action,
                                    GVariant   *value,
                                    gpointer    data)
{
  GimpImage    *image;
  GimpDrawable *drawable;
  gboolean      locked;
  return_if_no_drawable (image, drawable, data);

  locked = g_variant_get_boolean (value);

  if (GIMP_IS_LAYER_MASK (drawable))
    drawable =
      GIMP_DRAWABLE (gimp_layer_mask_get_layer (GIMP_LAYER_MASK (drawable)));

  if (locked != gimp_item_get_lock_content (GIMP_ITEM (drawable)))
    {
#if 0
      GimpUndo *undo;
#endif
      gboolean  push_undo = TRUE;

#if 0
      undo = gimp_image_undo_can_compress (image, GIMP_TYPE_ITEM_UNDO,
                                           GIMP_UNDO_ITEM_VISIBILITY);

      if (undo && GIMP_ITEM_UNDO (undo)->item == GIMP_ITEM (drawable))
        push_undo = FALSE;
#endif

      gimp_item_set_lock_content (GIMP_ITEM (drawable), locked, push_undo);
      gimp_image_flush (image);
    }
}

void
drawable_lock_position_cmd_callback (GimpAction *action,
                                     GVariant   *value,
                                     gpointer    data)
{
  GimpImage    *image;
  GimpDrawable *drawable;
  gboolean      locked;
  return_if_no_drawable (image, drawable, data);

  locked = g_variant_get_boolean (value);

  if (GIMP_IS_LAYER_MASK (drawable))
    drawable =
      GIMP_DRAWABLE (gimp_layer_mask_get_layer (GIMP_LAYER_MASK (drawable)));

  if (locked != gimp_item_get_lock_position (GIMP_ITEM (drawable)))
    {
      GimpUndo *undo;
      gboolean  push_undo = TRUE;

      undo = gimp_image_undo_can_compress (image, GIMP_TYPE_ITEM_UNDO,
                                           GIMP_UNDO_ITEM_LOCK_POSITION);

      if (undo && GIMP_ITEM_UNDO (undo)->item == GIMP_ITEM (drawable))
        push_undo = FALSE;

      gimp_item_set_lock_position (GIMP_ITEM (drawable), locked, push_undo);
      gimp_image_flush (image);
    }
}

void
drawable_flip_cmd_callback (GimpAction *action,
                            GVariant   *value,
                            gpointer    data)
{
  GimpImage           *image;
  GimpDrawable        *drawable;
  GimpItem            *item;
  GimpContext         *context;
  gint                 off_x, off_y;
  gdouble              axis = 0.0;
  GimpOrientationType  orientation;
  return_if_no_drawable (image, drawable, data);
  return_if_no_context (context, data);

  orientation = (GimpOrientationType) g_variant_get_int32 (value);

  item = GIMP_ITEM (drawable);

  gimp_item_get_offset (item, &off_x, &off_y);

  switch (orientation)
    {
    case GIMP_ORIENTATION_HORIZONTAL:
      axis = ((gdouble) off_x + (gdouble) gimp_item_get_width (item) / 2.0);
      break;

    case GIMP_ORIENTATION_VERTICAL:
      axis = ((gdouble) off_y + (gdouble) gimp_item_get_height (item) / 2.0);
      break;

    default:
      break;
    }

  if (gimp_item_get_linked (item))
    {
      gimp_item_linked_flip (item, context, orientation, axis, FALSE);
    }
  else
    {
      gimp_item_flip (item, context, orientation, axis,
                      gimp_item_get_clip (item, FALSE));
    }

  gimp_image_flush (image);
}

void
drawable_rotate_cmd_callback (GimpAction *action,
                              GVariant   *value,
                              gpointer    data)
{
  GimpImage        *image;
  GimpDrawable     *drawable;
  GimpContext      *context;
  GimpItem         *item;
  gint              off_x, off_y;
  gdouble           center_x, center_y;
  GimpRotationType  rotation_type;
  return_if_no_drawable (image, drawable, data);
  return_if_no_context (context, data);

  rotation_type = (GimpRotationType) g_variant_get_int32 (value);

  item = GIMP_ITEM (drawable);

  gimp_item_get_offset (item, &off_x, &off_y);

  center_x = ((gdouble) off_x + (gdouble) gimp_item_get_width  (item) / 2.0);
  center_y = ((gdouble) off_y + (gdouble) gimp_item_get_height (item) / 2.0);

  if (gimp_item_get_linked (item))
    {
      gimp_item_linked_rotate (item, context, rotation_type,
                               center_x, center_y, FALSE);
    }
  else
    {
      gimp_item_rotate (item, context,
                        rotation_type, center_x, center_y,
                        gimp_item_get_clip (item, FALSE));
    }

  gimp_image_flush (image);
}