gimp/app/core/gimplist.c

584 lines
17 KiB
C

/* GIMP - The GNU Image Manipulation Program
* Copyright (C) 1995-1997 Spencer Kimball and Peter Mattis
*
* gimplist.c
* Copyright (C) 2001 Michael Natterer <mitch@gimp.org>
*
* 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 <stdlib.h>
#include <string.h> /* strcmp */
#include <glib-object.h>
#include "core-types.h"
#include "gimplist.h"
enum
{
PROP_0,
PROP_UNIQUE_NAMES,
PROP_SORT_FUNC
};
static void gimp_list_set_property (GObject *object,
guint property_id,
const GValue *value,
GParamSpec *pspec);
static void gimp_list_get_property (GObject *object,
guint property_id,
GValue *value,
GParamSpec *pspec);
static gint64 gimp_list_get_memsize (GimpObject *object,
gint64 *gui_size);
static void gimp_list_add (GimpContainer *container,
GimpObject *object);
static void gimp_list_remove (GimpContainer *container,
GimpObject *object);
static void gimp_list_reorder (GimpContainer *container,
GimpObject *object,
gint new_index);
static void gimp_list_clear (GimpContainer *container);
static gboolean gimp_list_have (const GimpContainer *container,
const GimpObject *object);
static void gimp_list_foreach (const GimpContainer *container,
GFunc func,
gpointer user_data);
static GimpObject * gimp_list_get_child_by_name (const GimpContainer *container,
const gchar *name);
static GimpObject * gimp_list_get_child_by_index (const GimpContainer *container,
gint index);
static gint gimp_list_get_child_index (const GimpContainer *container,
const GimpObject *object);
static void gimp_list_uniquefy_name (GimpList *gimp_list,
GimpObject *object);
static void gimp_list_object_renamed (GimpObject *object,
GimpList *list);
G_DEFINE_TYPE (GimpList, gimp_list, GIMP_TYPE_CONTAINER)
#define parent_class gimp_list_parent_class
static void
gimp_list_class_init (GimpListClass *klass)
{
GObjectClass *object_class = G_OBJECT_CLASS (klass);
GimpObjectClass *gimp_object_class = GIMP_OBJECT_CLASS (klass);
GimpContainerClass *container_class = GIMP_CONTAINER_CLASS (klass);
object_class->set_property = gimp_list_set_property;
object_class->get_property = gimp_list_get_property;
gimp_object_class->get_memsize = gimp_list_get_memsize;
container_class->add = gimp_list_add;
container_class->remove = gimp_list_remove;
container_class->reorder = gimp_list_reorder;
container_class->clear = gimp_list_clear;
container_class->have = gimp_list_have;
container_class->foreach = gimp_list_foreach;
container_class->get_child_by_name = gimp_list_get_child_by_name;
container_class->get_child_by_index = gimp_list_get_child_by_index;
container_class->get_child_index = gimp_list_get_child_index;
g_object_class_install_property (object_class, PROP_UNIQUE_NAMES,
g_param_spec_boolean ("unique-names",
NULL, NULL,
FALSE,
GIMP_PARAM_READWRITE |
G_PARAM_CONSTRUCT_ONLY));
g_object_class_install_property (object_class, PROP_SORT_FUNC,
g_param_spec_pointer ("sort-func",
NULL, NULL,
GIMP_PARAM_READWRITE |
G_PARAM_CONSTRUCT));
}
static void
gimp_list_init (GimpList *list)
{
list->list = NULL;
list->unique_names = FALSE;
list->sort_func = NULL;
}
static void
gimp_list_set_property (GObject *object,
guint property_id,
const GValue *value,
GParamSpec *pspec)
{
GimpList *list = GIMP_LIST (object);
switch (property_id)
{
case PROP_UNIQUE_NAMES:
list->unique_names = g_value_get_boolean (value);
break;
case PROP_SORT_FUNC:
gimp_list_set_sort_func (list, g_value_get_pointer (value));
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
break;
}
}
static void
gimp_list_get_property (GObject *object,
guint property_id,
GValue *value,
GParamSpec *pspec)
{
GimpList *list = GIMP_LIST (object);
switch (property_id)
{
case PROP_UNIQUE_NAMES:
g_value_set_boolean (value, list->unique_names);
break;
case PROP_SORT_FUNC:
g_value_set_pointer (value, list->sort_func);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
break;
}
}
static gint64
gimp_list_get_memsize (GimpObject *object,
gint64 *gui_size)
{
GimpList *list = GIMP_LIST (object);
gint64 memsize = 0;
memsize += (gimp_container_num_children (GIMP_CONTAINER (list)) *
sizeof (GList));
if (gimp_container_policy (GIMP_CONTAINER (list)) ==
GIMP_CONTAINER_POLICY_STRONG)
{
GList *glist;
for (glist = list->list; glist; glist = g_list_next (glist))
memsize += gimp_object_get_memsize (GIMP_OBJECT (glist->data), gui_size);
}
return memsize + GIMP_OBJECT_CLASS (parent_class)->get_memsize (object,
gui_size);
}
static void
gimp_list_add (GimpContainer *container,
GimpObject *object)
{
GimpList *list = GIMP_LIST (container);
if (list->unique_names)
gimp_list_uniquefy_name (list, object);
if (list->unique_names || list->sort_func)
g_signal_connect (object, "name-changed",
G_CALLBACK (gimp_list_object_renamed),
list);
if (list->sort_func)
list->list = g_list_insert_sorted (list->list, object, list->sort_func);
else
list->list = g_list_prepend (list->list, object);
}
static void
gimp_list_remove (GimpContainer *container,
GimpObject *object)
{
GimpList *list = GIMP_LIST (container);
if (list->unique_names || list->sort_func)
g_signal_handlers_disconnect_by_func (object,
gimp_list_object_renamed,
list);
list->list = g_list_remove (list->list, object);
}
static void
gimp_list_reorder (GimpContainer *container,
GimpObject *object,
gint new_index)
{
GimpList *list = GIMP_LIST (container);
list->list = g_list_remove (list->list, object);
if (new_index == -1 || new_index == container->num_children - 1)
list->list = g_list_append (list->list, object);
else
list->list = g_list_insert (list->list, object, new_index);
}
static void
gimp_list_clear (GimpContainer *container)
{
GimpList *list = GIMP_LIST (container);
while (list->list)
gimp_container_remove (container, list->list->data);
}
static gboolean
gimp_list_have (const GimpContainer *container,
const GimpObject *object)
{
GimpList *list = GIMP_LIST (container);
return g_list_find (list->list, object) ? TRUE : FALSE;
}
static void
gimp_list_foreach (const GimpContainer *container,
GFunc func,
gpointer user_data)
{
GimpList *list = GIMP_LIST (container);
g_list_foreach (list->list, func, user_data);
}
static GimpObject *
gimp_list_get_child_by_name (const GimpContainer *container,
const gchar *name)
{
GimpList *list = GIMP_LIST (container);
GList *glist;
for (glist = list->list; glist; glist = g_list_next (glist))
{
GimpObject *object = glist->data;
if (! strcmp (object->name, name))
return object;
}
return NULL;
}
static GimpObject *
gimp_list_get_child_by_index (const GimpContainer *container,
gint index)
{
GimpList *list = GIMP_LIST (container);
GList *glist;
glist = g_list_nth (list->list, index);
if (glist)
return (GimpObject *) glist->data;
return NULL;
}
static gint
gimp_list_get_child_index (const GimpContainer *container,
const GimpObject *object)
{
GimpList *list = GIMP_LIST (container);
return g_list_index (list->list, (gpointer) object);
}
/**
* gimp_list_new:
* @children_type: the #GType of objects the list is going to hold
* @unique_names: if the list should ensure that all its children
* have unique names.
*
* Creates a new #GimpList object. Since #GimpList is a #GimpContainer
* implementation, it holds GimpObjects. Thus @children_type must be
* GIMP_TYPE_OBJECT or a type derived from it.
*
* The returned list has the #GIMP_CONTAINER_POLICY_STRONG.
*
* Return value: a new #GimpList object
**/
GimpContainer *
gimp_list_new (GType children_type,
gboolean unique_names)
{
GimpList *list;
g_return_val_if_fail (g_type_is_a (children_type, GIMP_TYPE_OBJECT), NULL);
list = g_object_new (GIMP_TYPE_LIST,
"children-type", children_type,
"policy", GIMP_CONTAINER_POLICY_STRONG,
"unique-names", unique_names ? TRUE : FALSE,
NULL);
/* for debugging purposes only */
gimp_object_set_static_name (GIMP_OBJECT (list), g_type_name (children_type));
return GIMP_CONTAINER (list);
}
/**
* gimp_list_new_weak:
* @children_type: the #GType of objects the list is going to hold
* @unique_names: if the list should ensure that all its children
* have unique names.
*
* Creates a new #GimpList object. Since #GimpList is a #GimpContainer
* implementation, it holds GimpObjects. Thus @children_type must be
* GIMP_TYPE_OBJECT or a type derived from it.
*
* The returned list has the #GIMP_CONTAINER_POLICY_WEAK.
*
* Return value: a new #GimpList object
**/
GimpContainer *
gimp_list_new_weak (GType children_type,
gboolean unique_names)
{
GimpList *list;
g_return_val_if_fail (g_type_is_a (children_type, GIMP_TYPE_OBJECT), NULL);
list = g_object_new (GIMP_TYPE_LIST,
"children-type", children_type,
"policy", GIMP_CONTAINER_POLICY_WEAK,
"unique-names", unique_names ? TRUE : FALSE,
NULL);
/* for debugging purposes only */
gimp_object_set_static_name (GIMP_OBJECT (list), g_type_name (children_type));
return GIMP_CONTAINER (list);
}
/**
* gimp_list_reverse:
* @list: a #GimpList
*
* Reverses the order of elements in a #GimpList.
**/
void
gimp_list_reverse (GimpList *list)
{
g_return_if_fail (GIMP_IS_LIST (list));
if (GIMP_CONTAINER (list)->num_children > 1)
{
gimp_container_freeze (GIMP_CONTAINER (list));
list->list = g_list_reverse (list->list);
gimp_container_thaw (GIMP_CONTAINER (list));
}
}
/**
* gimp_list_set_sort_func:
* @list: a #GimpList
* @sort_func: a #GCompareFunc
*
* Sorts the elements of @list using gimp_list_sort() and remembers the
* passed @sort_func in order to keep the list ordered across inserting
* or renaming children.
**/
void
gimp_list_set_sort_func (GimpList *list,
GCompareFunc sort_func)
{
g_return_if_fail (GIMP_IS_LIST (list));
if (sort_func != list->sort_func)
{
if (sort_func)
gimp_list_sort (list, sort_func);
list->sort_func = sort_func;
g_object_notify (G_OBJECT (list), "sort-func");
}
}
/**
* gimp_list_sort:
* @list: a #GimpList
* @sort_func: a #GCompareFunc
*
* Sorts the elements of a #GimpList according to the given @sort_func.
* See g_list_sort() for a detailed description of this function.
**/
void
gimp_list_sort (GimpList *list,
GCompareFunc sort_func)
{
g_return_if_fail (GIMP_IS_LIST (list));
g_return_if_fail (sort_func != NULL);
if (GIMP_CONTAINER (list)->num_children > 1)
{
gimp_container_freeze (GIMP_CONTAINER (list));
list->list = g_list_sort (list->list, sort_func);
gimp_container_thaw (GIMP_CONTAINER (list));
}
}
/**
* gimp_list_sort_by_name:
* @list: a #GimpList
*
* Sorts the #GimpObject elements of a #GimpList by their names.
**/
void
gimp_list_sort_by_name (GimpList *list)
{
g_return_if_fail (GIMP_IS_LIST (list));
gimp_list_sort (list, (GCompareFunc) gimp_object_name_collate);
}
/* private functions */
static void
gimp_list_uniquefy_name (GimpList *gimp_list,
GimpObject *object)
{
GList *list;
GList *list2;
gint unique_ext = 0;
gchar *new_name = NULL;
gchar *ext;
g_return_if_fail (GIMP_IS_LIST (gimp_list));
g_return_if_fail (GIMP_IS_OBJECT (object));
for (list = gimp_list->list; list; list = g_list_next (list))
{
GimpObject *object2 = GIMP_OBJECT (list->data);
if (object != object2 &&
strcmp (gimp_object_get_name (GIMP_OBJECT (object)),
gimp_object_get_name (GIMP_OBJECT (object2))) == 0)
{
ext = strrchr (object->name, '#');
if (ext)
{
gchar *ext_str;
unique_ext = atoi (ext + 1);
ext_str = g_strdup_printf ("%d", unique_ext);
/* check if the extension really is of the form "#<n>" */
if (! strcmp (ext_str, ext + 1))
{
*ext = '\0';
}
else
{
unique_ext = 0;
}
g_free (ext_str);
}
else
{
unique_ext = 0;
}
do
{
unique_ext++;
g_free (new_name);
new_name = g_strdup_printf ("%s#%d", object->name, unique_ext);
for (list2 = gimp_list->list; list2; list2 = g_list_next (list2))
{
object2 = GIMP_OBJECT (list2->data);
if (object == object2)
continue;
if (! strcmp (object2->name, new_name))
break;
}
}
while (list2);
gimp_object_take_name (object, new_name);
break;
}
}
}
static void
gimp_list_object_renamed (GimpObject *object,
GimpList *list)
{
if (list->unique_names)
{
g_signal_handlers_block_by_func (object,
gimp_list_object_renamed,
list);
gimp_list_uniquefy_name (list, object);
g_signal_handlers_unblock_by_func (object,
gimp_list_object_renamed,
list);
}
if (list->sort_func)
{
GList *glist;
gint old_index;
gint new_index = 0;
old_index = g_list_index (list->list, object);
for (glist = list->list; glist; glist = g_list_next (glist))
{
GimpObject *object2 = GIMP_OBJECT (glist->data);
if (object == object2)
continue;
if (list->sort_func (object, object2) > 0)
new_index++;
else
break;
}
if (new_index != old_index)
gimp_container_reorder (GIMP_CONTAINER (list), object, new_index);
}
}