gimp-filter-history.c 4.07 KB
Newer Older
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21
/* 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 <http://www.gnu.org/licenses/>.
 */

#include "config.h"

22 23
#include <string.h>

24
#include <gdk-pixbuf/gdk-pixbuf.h>
25
#include <gegl.h>
26 27 28 29 30 31 32 33 34 35

#include "libgimpbase/gimpbase.h"

#include "core-types.h"

#include "config/gimpcoreconfig.h"

#include "gimp.h"
#include "gimp-filter-history.h"

36
#include "pdb/gimpprocedure.h"
37 38


39 40 41 42 43 44 45 46
/*  local function prototypes  */

static gint   gimp_filter_history_compare (GimpProcedure *proc1,
                                           GimpProcedure *proc2);


/*  public functions  */

47
gint
48 49 50 51 52 53 54
gimp_filter_history_size (Gimp *gimp)
{
  g_return_val_if_fail (GIMP_IS_GIMP (gimp), 0);

  return MAX (1, gimp->config->filter_history_size);
}

55
gint
56 57 58 59 60 61 62
gimp_filter_history_length (Gimp *gimp)
{
  g_return_val_if_fail (GIMP_IS_GIMP (gimp), 0);

  return g_list_length (gimp->filter_history);
}

63
GimpProcedure *
64 65 66 67 68 69 70 71 72
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
73 74
gimp_filter_history_add (Gimp          *gimp,
                         GimpProcedure *procedure)
75 76 77 78
{
  GList *link;

  g_return_if_fail (GIMP_IS_GIMP (gimp));
79
  g_return_if_fail (GIMP_IS_PROCEDURE (procedure));
80 81

  /* return early if the procedure is already at the top */
82
  if (gimp->filter_history &&
83
      gimp_filter_history_compare (gimp->filter_history->data, procedure) == 0)
84 85
    return;

86 87
  /* ref new first then unref old, they might be the same */
  g_object_ref (procedure);
88

89
  link = g_list_find_custom (gimp->filter_history, procedure,
90
                             (GCompareFunc) gimp_filter_history_compare);
91 92 93

  if (link)
    {
94
      g_object_unref (link->data);
95 96 97
      gimp->filter_history = g_list_delete_link (gimp->filter_history, link);
    }

98 99 100
  gimp->filter_history = g_list_prepend (gimp->filter_history, procedure);

  link = g_list_nth (gimp->filter_history, gimp_filter_history_size (gimp));
101 102 103 104

  if (link)
    {
      g_object_unref (link->data);
105
      gimp->filter_history = g_list_delete_link (gimp->filter_history, link);
106 107 108 109 110 111
    }

  gimp_filter_history_changed (gimp);
}

void
112 113
gimp_filter_history_remove (Gimp          *gimp,
                            GimpProcedure *procedure)
114 115 116 117
{
  GList *link;

  g_return_if_fail (GIMP_IS_GIMP (gimp));
118
  g_return_if_fail (GIMP_IS_PROCEDURE (procedure));
119

120
  link = g_list_find_custom (gimp->filter_history, procedure,
121
                             (GCompareFunc) gimp_filter_history_compare);
122 123 124

  if (link)
    {
125
      g_object_unref (link->data);
126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144
      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);
    }
}
145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160


/*  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)));
}