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/* GIMP - The GNU Image Manipulation Program
* Copyright (C) 1995-2003 Spencer Kimball and Peter Mattis
*
* gimp-filter-history.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 <gdk-pixbuf/gdk-pixbuf.h>
#include <gegl.h>
#include "libgimpbase/gimpbase.h"
#include "core-types.h"
#include "config/gimpcoreconfig.h"
#include "gimp.h"
#include "gimp-filter-history.h"
#include "pdb/gimpprocedure.h"
/* local function prototypes */
static gint gimp_filter_history_compare (GimpProcedure *proc1,
GimpProcedure *proc2);
/* public functions */
gint
gimp_filter_history_size (Gimp *gimp)
{
g_return_val_if_fail (GIMP_IS_GIMP (gimp), 0);
return MAX (1, gimp->config->filter_history_size);
}
gint
gimp_filter_history_length (Gimp *gimp)
{
g_return_val_if_fail (GIMP_IS_GIMP (gimp), 0);
return g_list_length (gimp->filter_history);
}
GimpProcedure *
gimp_filter_history_nth (Gimp *gimp,
gint n)
{
g_return_val_if_fail (GIMP_IS_GIMP (gimp), NULL);
return g_list_nth_data (gimp->filter_history, n);
}
void
gimp_filter_history_add (Gimp *gimp,
GimpProcedure *procedure)
{
GList *link;
g_return_if_fail (GIMP_IS_GIMP (gimp));
g_return_if_fail (GIMP_IS_PROCEDURE (procedure));
/* return early if the procedure is already at the top */
if (gimp->filter_history &&
gimp_filter_history_compare (gimp->filter_history->data, procedure) == 0)
return;
/* ref new first then unref old, they might be the same */
g_object_ref (procedure);
link = g_list_find_custom (gimp->filter_history, procedure,
(GCompareFunc) gimp_filter_history_compare);
if (link)
{
g_object_unref (link->data);
gimp->filter_history = g_list_delete_link (gimp->filter_history, link);
}
gimp->filter_history = g_list_prepend (gimp->filter_history, procedure);
link = g_list_nth (gimp->filter_history, gimp_filter_history_size (gimp));
if (link)
{
g_object_unref (link->data);
gimp->filter_history = g_list_delete_link (gimp->filter_history, link);
}
gimp_filter_history_changed (gimp);
}
void
gimp_filter_history_remove (Gimp *gimp,
GimpProcedure *procedure)
{
GList *link;
g_return_if_fail (GIMP_IS_GIMP (gimp));
g_return_if_fail (GIMP_IS_PROCEDURE (procedure));
link = g_list_find_custom (gimp->filter_history, procedure,
(GCompareFunc) gimp_filter_history_compare);
if (link)
{
g_object_unref (link->data);
gimp->filter_history = g_list_delete_link (gimp->filter_history, link);
gimp_filter_history_changed (gimp);
}
}
void
gimp_filter_history_clear (Gimp *gimp)
{
g_return_if_fail (GIMP_IS_GIMP (gimp));
if (gimp->filter_history)
{
g_list_free_full (gimp->filter_history, (GDestroyNotify) g_object_unref);
gimp->filter_history = NULL;
gimp_filter_history_changed (gimp);
}
}
/* private functions */
static gint
gimp_filter_history_compare (GimpProcedure *proc1,
GimpProcedure *proc2)
{
/* the procedures can have the same name, but could still be two
* different filters using the same operation, so also compare
* their menu labels
*/
return (gimp_procedure_name_compare (proc1, proc2) ||
strcmp (gimp_procedure_get_menu_label (proc1),
gimp_procedure_get_menu_label (proc2)));
}
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