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/*
* Copyright © 2019 Benjamin Otte
*
* 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: Benjamin Otte <otte@gnome.org>
*/
#include "config.h"
#include "gtkcustomfilter.h"
#include "gtktypebuiltins.h"
/**
* GtkCustomFilter:
*
* Determines whether to include items with a callback.
*/
struct _GtkCustomFilter
{
GtkFilter parent_instance;
GtkCustomFilterFunc match_func;
gpointer user_data;
GDestroyNotify user_destroy;
};
G_DEFINE_TYPE (GtkCustomFilter, gtk_custom_filter, GTK_TYPE_FILTER)
static gboolean
gtk_custom_filter_match (GtkFilter *filter,
gpointer item)
{
GtkCustomFilter *self = GTK_CUSTOM_FILTER (filter);
if (!self->match_func)
return TRUE;
return self->match_func (item, self->user_data);
}
static GtkFilterMatch
gtk_custom_filter_get_strictness (GtkFilter *filter)
{
GtkCustomFilter *self = GTK_CUSTOM_FILTER (filter);
if (!self->match_func)
return GTK_FILTER_MATCH_ALL;
return GTK_FILTER_MATCH_SOME;
}
static void
gtk_custom_filter_dispose (GObject *object)
{
GtkCustomFilter *self = GTK_CUSTOM_FILTER (object);
if (self->user_destroy)
self->user_destroy (self->user_data);
G_OBJECT_CLASS (gtk_custom_filter_parent_class)->dispose (object);
}
static void
gtk_custom_filter_class_init (GtkCustomFilterClass *class)
{
GtkFilterClass *filter_class = GTK_FILTER_CLASS (class);
GObjectClass *object_class = G_OBJECT_CLASS (class);
filter_class->match = gtk_custom_filter_match;
filter_class->get_strictness = gtk_custom_filter_get_strictness;
object_class->dispose = gtk_custom_filter_dispose;
}
static void
gtk_custom_filter_init (GtkCustomFilter *self)
{
}
/**
* gtk_custom_filter_new:
* @match_func: (nullable): function to filter items
* @user_data: (nullable): user data to pass to @match_func
* @user_destroy: destroy notify for @user_data
*
* Creates a new filter using the given function to filter items.
*
* If @match_func is `NULL`, the filter matches all items.
*
* If the filter func changes its filtering behavior,
* [method@Gtk.Filter.changed] needs to be called.
*
* Returns: a new `GtkCustomFilter`
**/
GtkCustomFilter *
gtk_custom_filter_new (GtkCustomFilterFunc match_func,
gpointer user_data,
GDestroyNotify user_destroy)
{
GtkCustomFilter *result;
result = g_object_new (GTK_TYPE_CUSTOM_FILTER, NULL);
gtk_custom_filter_set_filter_func (result, match_func, user_data, user_destroy);
return result;
}
/**
* gtk_custom_filter_set_filter_func:
* @self: a custom filter
* @match_func: (nullable): function to filter items
* @user_data: (nullable): user data to pass to @match_func
* @user_destroy: destroy notify for @user_data
*
* Sets the function used for filtering items.
*
* If @match_func is `NULL`, the filter matches all items.
*
* If the filter func changes its filtering behavior,
* [method@Gtk.Filter.changed] needs to be called.
*
* If a previous function was set, its @user_destroy
* will be called.
*/
void
gtk_custom_filter_set_filter_func (GtkCustomFilter *self,
GtkCustomFilterFunc match_func,
gpointer user_data,
GDestroyNotify user_destroy)
{
g_return_if_fail (GTK_IS_CUSTOM_FILTER (self));
g_return_if_fail (match_func || (user_data == NULL && !user_destroy));
if (self->user_destroy)
self->user_destroy (self->user_data);
self->match_func = match_func;
self->user_data = user_data;
self->user_destroy = user_destroy;
gtk_filter_changed (GTK_FILTER (self), GTK_FILTER_CHANGE_DIFFERENT);
}
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