gimp/app/core/gimplist.c

205 lines
4.4 KiB
C

/* 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 <stdio.h>
#include "gimpsignal.h"
#include "gimplistP.h"
/* code mostly ripped from nether's gimpset class */
enum
{
ADD,
REMOVE,
LAST_SIGNAL
};
static guint gimp_list_signals [LAST_SIGNAL];
static GimpObjectClass* parent_class;
static void gimp_list_add_func (GimpList *list, void *);
static void gimp_list_remove_func (GimpList *list, void *);
static void
gimp_list_destroy (GtkObject* ob)
{
GimpList* list=GIMP_LIST (ob);
while (list->list) /* ought to put a sanity check in here... */
{
gimp_list_remove (list, list->list->data);
}
g_slist_free (list->list);
GTK_OBJECT_CLASS (parent_class)->destroy (ob);
}
static void
gimp_list_init (GimpList* list)
{
list->list = NULL;
list->type = GTK_TYPE_OBJECT;
}
static void
gimp_list_class_init (GimpListClass* klass)
{
GtkObjectClass *object_class = GTK_OBJECT_CLASS (klass);
GtkType type = object_class->type;
parent_class = gtk_type_parent_class (type);
object_class->destroy = gimp_list_destroy;
gimp_list_signals[ADD]=
gimp_signal_new ("add", GTK_RUN_FIRST, type, 0,
gimp_sigtype_pointer);
gimp_list_signals[REMOVE]=
gimp_signal_new ("remove", GTK_RUN_FIRST, type, 0,
gimp_sigtype_pointer);
gtk_object_class_add_signals (object_class,
gimp_list_signals,
LAST_SIGNAL);
klass->add = gimp_list_add_func;
klass->remove = gimp_list_remove_func;
}
GtkType
gimp_list_get_type (void)
{
static GtkType type;
GIMP_TYPE_INIT (type,
GimpList,
GimpListClass,
gimp_list_init,
gimp_list_class_init,
GIMP_TYPE_OBJECT);
return type;
}
GimpList*
gimp_list_new (GtkType type,
gboolean weak)
{
GimpList* list;
list = gtk_type_new (gimp_list_get_type ());
list->type = type;
list->weak = weak;
return list;
}
static void
gimp_list_destroy_cb (GtkObject *ob,
gpointer data)
{
GimpList* list;
list = GIMP_LIST (data);
gimp_list_remove (list, ob);
}
static void
gimp_list_add_func (GimpList *list,
gpointer val)
{
list->list = g_slist_prepend (list->list, val);
}
static void
gimp_list_remove_func (GimpList *list,
gpointer val)
{
list->list = g_slist_remove (list->list, val);
}
gboolean
gimp_list_add (GimpList *list,
gpointer val)
{
g_return_val_if_fail (list, FALSE);
g_return_val_if_fail (GTK_CHECK_TYPE (val, list->type), FALSE);
if (g_slist_find (list->list, val))
return FALSE;
if (list->weak)
gtk_signal_connect (GTK_OBJECT (val), "destroy",
GTK_SIGNAL_FUNC (gimp_list_destroy_cb),
list);
else
gtk_object_ref (GTK_OBJECT (val));
GIMP_LIST_CLASS (GTK_OBJECT (list)->klass)->add (list, val);
gtk_signal_emit (GTK_OBJECT(list), gimp_list_signals[ADD], val);
return TRUE;
}
gboolean
gimp_list_remove (GimpList *list,
gpointer val)
{
g_return_val_if_fail (list, FALSE);
if (!g_slist_find (list->list, val))
{
fprintf (stderr, "gimp_list_remove: can't find val\n");
return FALSE;
}
GIMP_LIST_CLASS (GTK_OBJECT (list)->klass)->remove (list, val);
gtk_signal_emit (GTK_OBJECT (list), gimp_list_signals[REMOVE], val);
if (list->weak)
gtk_signal_disconnect_by_func (GTK_OBJECT (val),
GTK_SIGNAL_FUNC (gimp_list_destroy_cb),
list);
else
gtk_object_unref (GTK_OBJECT (val));
return TRUE;
}
gboolean
gimp_list_have (GimpList *list,
gpointer val)
{
return g_slist_find (list->list, val) ? TRUE : FALSE;
}
void
gimp_list_foreach (GimpList *list,
GFunc func,
gpointer user_data)
{
g_slist_foreach (list->list, func, user_data);
}
GtkType
gimp_list_type (GimpList *list)
{
return list->type;
}