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/*
* Copyright © 2019 Matthias Clasen
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library. If not, see <http://www.gnu.org/licenses/>.
*
* Authors: Matthias Clasen <mclasen@redhat.com>
*/
#include "config.h"
#include "gtkcustomsorter.h"
#include "gtktypebuiltins.h"
/**
* GtkCustomSorter:
*
* `GtkCustomSorter` is a `GtkSorter` implementation that sorts via a callback
* function.
*/
struct _GtkCustomSorter
{
GtkSorter parent_instance;
GCompareDataFunc sort_func;
gpointer user_data;
GDestroyNotify user_destroy;
};
G_DEFINE_TYPE (GtkCustomSorter, gtk_custom_sorter, GTK_TYPE_SORTER)
static GtkOrdering
gtk_custom_sorter_compare (GtkSorter *sorter,
gpointer item1,
gpointer item2)
{
GtkCustomSorter *self = GTK_CUSTOM_SORTER (sorter);
if (!self->sort_func)
return GTK_ORDERING_EQUAL;
return gtk_ordering_from_cmpfunc (self->sort_func (item1, item2, self->user_data));
}
static GtkSorterOrder
gtk_custom_sorter_get_order (GtkSorter *sorter)
{
GtkCustomSorter *self = GTK_CUSTOM_SORTER (sorter);
if (!self->sort_func)
return GTK_SORTER_ORDER_NONE;
return GTK_SORTER_ORDER_PARTIAL;
}
static void
gtk_custom_sorter_dispose (GObject *object)
{
GtkCustomSorter *self = GTK_CUSTOM_SORTER (object);
if (self->user_destroy)
self->user_destroy (self->user_data);
self->sort_func = NULL;
self->user_destroy = NULL;
self->user_data = NULL;
G_OBJECT_CLASS (gtk_custom_sorter_parent_class)->dispose (object);
}
static void
gtk_custom_sorter_class_init (GtkCustomSorterClass *class)
{
GtkSorterClass *sorter_class = GTK_SORTER_CLASS (class);
GObjectClass *object_class = G_OBJECT_CLASS (class);
sorter_class->compare = gtk_custom_sorter_compare;
sorter_class->get_order = gtk_custom_sorter_get_order;
object_class->dispose = gtk_custom_sorter_dispose;
}
static void
gtk_custom_sorter_init (GtkCustomSorter *self)
{
}
/**
* gtk_custom_sorter_new:
* @sort_func: (nullable): the `GCompareDataFunc` to use for sorting
* @user_data: (nullable): user data to pass to @sort_func
* @user_destroy: (nullable): destroy notify for @user_data
*
* Creates a new `GtkSorter` that works by calling
* @sort_func to compare items.
*
* If @sort_func is %NULL, all items are considered equal.
*
* Returns: a new `GtkCustomSorter`
*/
GtkCustomSorter *
gtk_custom_sorter_new (GCompareDataFunc sort_func,
gpointer user_data,
GDestroyNotify user_destroy)
{
GtkCustomSorter *sorter;
sorter = g_object_new (GTK_TYPE_CUSTOM_SORTER, NULL);
gtk_custom_sorter_set_sort_func (sorter, sort_func, user_data, user_destroy);
return sorter;
}
/**
* gtk_custom_sorter_set_sort_func:
* @self: a `GtkCustomSorter`
* @sort_func: (nullable): function to sort items
* @user_data: (nullable): user data to pass to @match_func
* @user_destroy: destroy notify for @user_data
*
* Sets (or unsets) the function used for sorting items.
*
* If @sort_func is %NULL, all items are considered equal.
*
* If the sort func changes its sorting behavior,
* gtk_sorter_changed() needs to be called.
*
* If a previous function was set, its @user_destroy will be
* called now.
*/
void
gtk_custom_sorter_set_sort_func (GtkCustomSorter *self,
GCompareDataFunc sort_func,
gpointer user_data,
GDestroyNotify user_destroy)
{
g_return_if_fail (GTK_IS_CUSTOM_SORTER (self));
g_return_if_fail (sort_func || (user_data == NULL && !user_destroy));
if (self->user_destroy)
self->user_destroy (self->user_data);
self->sort_func = sort_func;
self->user_data = user_data;
self->user_destroy = user_destroy;
gtk_sorter_changed (GTK_SORTER (self), GTK_SORTER_CHANGE_DIFFERENT);
}
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