PIKApp/app/core/pikalist.c

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2023-09-26 00:35:21 +02:00
/* PIKA - Photo and Image Kooker Application
* a rebranding of The GNU Image Manipulation Program (created with heckimp)
* A derived work which may be trivial. However, any changes may be (C)2023 by Aldercone Studio
*
* Original copyright, applying to most contents (license remains unchanged):
* Copyright (C) 1995-1997 Spencer Kimball and Peter Mattis
*
* pikalist.c
* Copyright (C) 2001-2016 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 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 <stdlib.h>
#include <string.h> /* strcmp */
#include <gio/gio.h>
#include "libpikabase/pikabase.h"
#include "core-types.h"
#include "pika-memsize.h"
#include "pikalist.h"
enum
{
PROP_0,
PROP_UNIQUE_NAMES,
PROP_SORT_FUNC,
PROP_APPEND
};
static void pika_list_finalize (GObject *object);
static void pika_list_set_property (GObject *object,
guint property_id,
const GValue *value,
GParamSpec *pspec);
static void pika_list_get_property (GObject *object,
guint property_id,
GValue *value,
GParamSpec *pspec);
static gint64 pika_list_get_memsize (PikaObject *object,
gint64 *gui_size);
static void pika_list_add (PikaContainer *container,
PikaObject *object);
static void pika_list_remove (PikaContainer *container,
PikaObject *object);
static void pika_list_reorder (PikaContainer *container,
PikaObject *object,
gint new_index);
static void pika_list_clear (PikaContainer *container);
static gboolean pika_list_have (PikaContainer *container,
PikaObject *object);
static void pika_list_foreach (PikaContainer *container,
GFunc func,
gpointer user_data);
static PikaObject * pika_list_search (PikaContainer *container,
PikaContainerSearchFunc func,
gpointer user_data);
static gboolean pika_list_get_unique_names (PikaContainer *container);
static PikaObject * pika_list_get_child_by_name (PikaContainer *container,
const gchar *name);
static PikaObject * pika_list_get_child_by_index (PikaContainer *container,
gint index);
static gint pika_list_get_child_index (PikaContainer *container,
PikaObject *object);
static void pika_list_uniquefy_name (PikaList *pika_list,
PikaObject *object);
static void pika_list_object_renamed (PikaObject *object,
PikaList *list);
G_DEFINE_TYPE (PikaList, pika_list, PIKA_TYPE_CONTAINER)
#define parent_class pika_list_parent_class
static void
pika_list_class_init (PikaListClass *klass)
{
GObjectClass *object_class = G_OBJECT_CLASS (klass);
PikaObjectClass *pika_object_class = PIKA_OBJECT_CLASS (klass);
PikaContainerClass *container_class = PIKA_CONTAINER_CLASS (klass);
object_class->finalize = pika_list_finalize;
object_class->set_property = pika_list_set_property;
object_class->get_property = pika_list_get_property;
pika_object_class->get_memsize = pika_list_get_memsize;
container_class->add = pika_list_add;
container_class->remove = pika_list_remove;
container_class->reorder = pika_list_reorder;
container_class->clear = pika_list_clear;
container_class->have = pika_list_have;
container_class->foreach = pika_list_foreach;
container_class->search = pika_list_search;
container_class->get_unique_names = pika_list_get_unique_names;
container_class->get_child_by_name = pika_list_get_child_by_name;
container_class->get_child_by_index = pika_list_get_child_by_index;
container_class->get_child_index = pika_list_get_child_index;
g_object_class_install_property (object_class, PROP_UNIQUE_NAMES,
g_param_spec_boolean ("unique-names",
NULL, NULL,
FALSE,
PIKA_PARAM_READWRITE |
G_PARAM_CONSTRUCT_ONLY));
g_object_class_install_property (object_class, PROP_SORT_FUNC,
g_param_spec_pointer ("sort-func",
NULL, NULL,
PIKA_PARAM_READWRITE |
G_PARAM_CONSTRUCT));
g_object_class_install_property (object_class, PROP_APPEND,
g_param_spec_boolean ("append",
NULL, NULL,
FALSE,
PIKA_PARAM_READWRITE |
G_PARAM_CONSTRUCT));
}
static void
pika_list_init (PikaList *list)
{
list->queue = g_queue_new ();
list->unique_names = FALSE;
list->sort_func = NULL;
list->append = FALSE;
}
static void
pika_list_finalize (GObject *object)
{
PikaList *list = PIKA_LIST (object);
if (list->queue)
{
g_queue_free (list->queue);
list->queue = NULL;
}
G_OBJECT_CLASS (parent_class)->finalize (object);
}
static void
pika_list_set_property (GObject *object,
guint property_id,
const GValue *value,
GParamSpec *pspec)
{
PikaList *list = PIKA_LIST (object);
switch (property_id)
{
case PROP_UNIQUE_NAMES:
list->unique_names = g_value_get_boolean (value);
break;
case PROP_SORT_FUNC:
pika_list_set_sort_func (list, g_value_get_pointer (value));
break;
case PROP_APPEND:
list->append = g_value_get_boolean (value);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
break;
}
}
static void
pika_list_get_property (GObject *object,
guint property_id,
GValue *value,
GParamSpec *pspec)
{
PikaList *list = PIKA_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;
case PROP_APPEND:
g_value_set_boolean (value, list->append);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
break;
}
}
static gint64
pika_list_get_memsize (PikaObject *object,
gint64 *gui_size)
{
PikaList *list = PIKA_LIST (object);
gint64 memsize = 0;
if (pika_container_get_policy (PIKA_CONTAINER (list)) ==
PIKA_CONTAINER_POLICY_STRONG)
{
memsize += pika_g_queue_get_memsize_foreach (list->queue,
(PikaMemsizeFunc) pika_object_get_memsize,
gui_size);
}
else
{
memsize += pika_g_queue_get_memsize (list->queue, 0);
}
return memsize + PIKA_OBJECT_CLASS (parent_class)->get_memsize (object,
gui_size);
}
static gint
pika_list_sort_func (gconstpointer a,
gconstpointer b,
gpointer user_data)
{
GCompareFunc func = user_data;
return func (a, b);
}
static void
pika_list_add (PikaContainer *container,
PikaObject *object)
{
PikaList *list = PIKA_LIST (container);
if (list->unique_names)
pika_list_uniquefy_name (list, object);
if (list->unique_names || list->sort_func)
g_signal_connect (object, "name-changed",
G_CALLBACK (pika_list_object_renamed),
list);
if (list->sort_func)
{
g_queue_insert_sorted (list->queue, object, pika_list_sort_func,
list->sort_func);
}
else if (list->append)
{
g_queue_push_tail (list->queue, object);
}
else
{
g_queue_push_head (list->queue, object);
}
PIKA_CONTAINER_CLASS (parent_class)->add (container, object);
}
static void
pika_list_remove (PikaContainer *container,
PikaObject *object)
{
PikaList *list = PIKA_LIST (container);
if (list->unique_names || list->sort_func)
g_signal_handlers_disconnect_by_func (object,
pika_list_object_renamed,
list);
g_queue_remove (list->queue, object);
PIKA_CONTAINER_CLASS (parent_class)->remove (container, object);
}
static void
pika_list_reorder (PikaContainer *container,
PikaObject *object,
gint new_index)
{
PikaList *list = PIKA_LIST (container);
g_queue_remove (list->queue, object);
if (new_index == pika_container_get_n_children (container) - 1)
g_queue_push_tail (list->queue, object);
else
g_queue_push_nth (list->queue, object, new_index);
}
static void
pika_list_clear (PikaContainer *container)
{
PikaList *list = PIKA_LIST (container);
while (g_queue_peek_head (list->queue))
pika_container_remove (container, g_queue_peek_head (list->queue));
}
static gboolean
pika_list_have (PikaContainer *container,
PikaObject *object)
{
PikaList *list = PIKA_LIST (container);
return g_queue_find (list->queue, object) ? TRUE : FALSE;
}
static void
pika_list_foreach (PikaContainer *container,
GFunc func,
gpointer user_data)
{
PikaList *list = PIKA_LIST (container);
g_queue_foreach (list->queue, func, user_data);
}
static PikaObject *
pika_list_search (PikaContainer *container,
PikaContainerSearchFunc func,
gpointer user_data)
{
PikaList *list = PIKA_LIST (container);
GList *iter;
iter = list->queue->head;
while (iter)
{
PikaObject *object = iter->data;
iter = g_list_next (iter);
if (func (object, user_data))
return object;
}
return NULL;
}
static gboolean
pika_list_get_unique_names (PikaContainer *container)
{
PikaList *list = PIKA_LIST (container);
return list->unique_names;
}
static PikaObject *
pika_list_get_child_by_name (PikaContainer *container,
const gchar *name)
{
PikaList *list = PIKA_LIST (container);
GList *glist;
for (glist = list->queue->head; glist; glist = g_list_next (glist))
{
PikaObject *object = glist->data;
if (! strcmp (pika_object_get_name (object), name))
return object;
}
return NULL;
}
static PikaObject *
pika_list_get_child_by_index (PikaContainer *container,
gint index)
{
PikaList *list = PIKA_LIST (container);
return g_queue_peek_nth (list->queue, index);
}
static gint
pika_list_get_child_index (PikaContainer *container,
PikaObject *object)
{
PikaList *list = PIKA_LIST (container);
return g_queue_index (list->queue, (gpointer) object);
}
/**
* pika_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 #PikaList object. Since #PikaList is a #PikaContainer
* implementation, it holds PikaObjects. Thus @children_type must be
* PIKA_TYPE_OBJECT or a type derived from it.
*
* The returned list has the #PIKA_CONTAINER_POLICY_STRONG.
*
* Returns: a new #PikaList object
**/
PikaContainer *
pika_list_new (GType children_type,
gboolean unique_names)
{
PikaList *list;
g_return_val_if_fail (g_type_is_a (children_type, PIKA_TYPE_OBJECT), NULL);
list = g_object_new (PIKA_TYPE_LIST,
"children-type", children_type,
"policy", PIKA_CONTAINER_POLICY_STRONG,
"unique-names", unique_names ? TRUE : FALSE,
NULL);
/* for debugging purposes only */
pika_object_set_static_name (PIKA_OBJECT (list), g_type_name (children_type));
return PIKA_CONTAINER (list);
}
/**
* pika_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 #PikaList object. Since #PikaList is a #PikaContainer
* implementation, it holds PikaObjects. Thus @children_type must be
* PIKA_TYPE_OBJECT or a type derived from it.
*
* The returned list has the #PIKA_CONTAINER_POLICY_WEAK.
*
* Returns: a new #PikaList object
**/
PikaContainer *
pika_list_new_weak (GType children_type,
gboolean unique_names)
{
PikaList *list;
g_return_val_if_fail (g_type_is_a (children_type, PIKA_TYPE_OBJECT), NULL);
list = g_object_new (PIKA_TYPE_LIST,
"children-type", children_type,
"policy", PIKA_CONTAINER_POLICY_WEAK,
"unique-names", unique_names ? TRUE : FALSE,
NULL);
/* for debugging purposes only */
pika_object_set_static_name (PIKA_OBJECT (list), g_type_name (children_type));
return PIKA_CONTAINER (list);
}
/**
* pika_list_reverse:
* @list: a #PikaList
*
* Reverses the order of elements in a #PikaList.
**/
void
pika_list_reverse (PikaList *list)
{
g_return_if_fail (PIKA_IS_LIST (list));
if (pika_container_get_n_children (PIKA_CONTAINER (list)) > 1)
{
pika_container_freeze (PIKA_CONTAINER (list));
g_queue_reverse (list->queue);
pika_container_thaw (PIKA_CONTAINER (list));
}
}
/**
* pika_list_set_sort_func:
* @list: a #PikaList
* @sort_func: a #GCompareFunc
*
* Sorts the elements of @list using pika_list_sort() and remembers the
* passed @sort_func in order to keep the list ordered across inserting
* or renaming children.
**/
void
pika_list_set_sort_func (PikaList *list,
GCompareFunc sort_func)
{
g_return_if_fail (PIKA_IS_LIST (list));
if (sort_func != list->sort_func)
{
if (sort_func)
pika_list_sort (list, sort_func);
list->sort_func = sort_func;
g_object_notify (G_OBJECT (list), "sort-func");
}
}
/**
* pika_list_get_sort_func:
* @list: a #PikaList
*
* Returns the @list's sort function, see pika_list_set_sort_func().
*
* Returns: The @list's sort function.
**/
GCompareFunc
pika_list_get_sort_func (PikaList *list)
{
g_return_val_if_fail (PIKA_IS_LIST (list), NULL);
return list->sort_func;
}
/**
* pika_list_sort:
* @list: a #PikaList
* @sort_func: a #GCompareFunc
*
* Sorts the elements of a #PikaList according to the given @sort_func.
* See g_list_sort() for a detailed description of this function.
**/
void
pika_list_sort (PikaList *list,
GCompareFunc sort_func)
{
g_return_if_fail (PIKA_IS_LIST (list));
g_return_if_fail (sort_func != NULL);
if (pika_container_get_n_children (PIKA_CONTAINER (list)) > 1)
{
pika_container_freeze (PIKA_CONTAINER (list));
g_queue_sort (list->queue, pika_list_sort_func, sort_func);
pika_container_thaw (PIKA_CONTAINER (list));
}
}
/**
* pika_list_sort_by_name:
* @list: a #PikaList
*
* Sorts the #PikaObject elements of a #PikaList by their names.
**/
void
pika_list_sort_by_name (PikaList *list)
{
g_return_if_fail (PIKA_IS_LIST (list));
pika_list_sort (list, (GCompareFunc) pika_object_name_collate);
}
/* private functions */
static void
pika_list_uniquefy_name (PikaList *pika_list,
PikaObject *object)
{
gchar *name = (gchar *) pika_object_get_name (object);
GList *list;
if (! name)
return;
for (list = pika_list->queue->head; list; list = g_list_next (list))
{
PikaObject *object2 = list->data;
const gchar *name2 = pika_object_get_name (object2);
if (object != object2 &&
name2 &&
! strcmp (name, name2))
break;
}
if (list)
{
gchar *ext;
gchar *new_name = NULL;
gint unique_ext = 0;
name = g_strdup (name);
ext = strrchr (name, '#');
if (ext)
{
gchar ext_str[8];
unique_ext = atoi (ext + 1);
g_snprintf (ext_str, sizeof (ext_str), "%d", unique_ext);
/* check if the extension really is of the form "#<n>" */
if (! strcmp (ext_str, ext + 1))
{
if (ext > name && *(ext - 1) == ' ')
ext--;
*ext = '\0';
}
else
{
unique_ext = 0;
}
}
do
{
unique_ext++;
g_free (new_name);
new_name = g_strdup_printf ("%s #%d", name, unique_ext);
for (list = pika_list->queue->head; list; list = g_list_next (list))
{
PikaObject *object2 = list->data;
const gchar *name2 = pika_object_get_name (object2);
if (object != object2 &&
name2 &&
! strcmp (new_name, name2))
break;
}
}
while (list);
g_free (name);
pika_object_take_name (object, new_name);
}
}
static void
pika_list_object_renamed (PikaObject *object,
PikaList *list)
{
if (list->unique_names)
{
g_signal_handlers_block_by_func (object,
pika_list_object_renamed,
list);
pika_list_uniquefy_name (list, object);
g_signal_handlers_unblock_by_func (object,
pika_list_object_renamed,
list);
}
if (list->sort_func)
{
GList *glist;
gint old_index;
gint new_index = 0;
old_index = g_queue_index (list->queue, object);
for (glist = list->queue->head; glist; glist = g_list_next (glist))
{
PikaObject *object2 = PIKA_OBJECT (glist->data);
if (object == object2)
continue;
if (list->sort_func (object, object2) > 0)
new_index++;
else
break;
}
if (new_index != old_index)
pika_container_reorder (PIKA_CONTAINER (list), object, new_index);
}
}