mirror of
https://gitlab.gnome.org/GNOME/gtk.git
synced 2024-12-30 15:31:34 +00:00
369 lines
9.7 KiB
C
369 lines
9.7 KiB
C
/*
|
|
* Copyright © 2018 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>
|
|
*/
|
|
|
|
|
|
/*
|
|
* GtkListListModel:
|
|
*
|
|
* `GtkListListModel` is a `GListModel` implementation that takes a list API
|
|
* and provides it as a `GListModel`.
|
|
*/
|
|
|
|
#include "config.h"
|
|
|
|
#include "gtklistlistmodelprivate.h"
|
|
|
|
struct _GtkListListModel
|
|
{
|
|
GObject parent_instance;
|
|
|
|
guint n_items;
|
|
gpointer (* get_first) (gpointer);
|
|
gpointer (* get_next) (gpointer, gpointer);
|
|
gpointer (* get_previous) (gpointer, gpointer);
|
|
gpointer (* get_last) (gpointer);
|
|
gpointer (* get_item) (gpointer, gpointer);
|
|
gpointer data;
|
|
GDestroyNotify notify;
|
|
};
|
|
|
|
struct _GtkListListModelClass
|
|
{
|
|
GObjectClass parent_class;
|
|
};
|
|
|
|
enum {
|
|
PROP_0,
|
|
PROP_ITEM_TYPE,
|
|
PROP_N_ITEMS,
|
|
|
|
N_PROPS
|
|
};
|
|
|
|
static GParamSpec *properties[N_PROPS] = { NULL, };
|
|
|
|
static GType
|
|
gtk_list_list_model_get_item_type (GListModel *list)
|
|
{
|
|
return G_TYPE_OBJECT;
|
|
}
|
|
|
|
static guint
|
|
gtk_list_list_model_get_n_items (GListModel *list)
|
|
{
|
|
GtkListListModel *self = GTK_LIST_LIST_MODEL (list);
|
|
|
|
return self->n_items;
|
|
}
|
|
|
|
static gpointer
|
|
gtk_list_list_model_get_item (GListModel *list,
|
|
guint position)
|
|
{
|
|
GtkListListModel *self = GTK_LIST_LIST_MODEL (list);
|
|
gpointer result;
|
|
guint i;
|
|
|
|
if (position >= self->n_items)
|
|
{
|
|
return NULL;
|
|
}
|
|
else if (self->get_last &&
|
|
position >= self->n_items / 2)
|
|
{
|
|
result = self->get_last (self->data);
|
|
|
|
for (i = self->n_items - 1; i > position; i--)
|
|
{
|
|
result = self->get_previous (result, self->data);
|
|
}
|
|
}
|
|
else
|
|
{
|
|
result = self->get_first (self->data);
|
|
|
|
for (i = 0; i < position; i++)
|
|
{
|
|
result = self->get_next (result, self->data);
|
|
}
|
|
}
|
|
|
|
return self->get_item (result, self->data);
|
|
}
|
|
|
|
static void
|
|
gtk_list_list_model_list_model_init (GListModelInterface *iface)
|
|
{
|
|
iface->get_item_type = gtk_list_list_model_get_item_type;
|
|
iface->get_n_items = gtk_list_list_model_get_n_items;
|
|
iface->get_item = gtk_list_list_model_get_item;
|
|
}
|
|
|
|
G_DEFINE_TYPE_WITH_CODE (GtkListListModel, gtk_list_list_model,
|
|
G_TYPE_OBJECT,
|
|
G_IMPLEMENT_INTERFACE (G_TYPE_LIST_MODEL, gtk_list_list_model_list_model_init))
|
|
|
|
static void
|
|
gtk_list_list_model_get_property (GObject *object,
|
|
guint prop_id,
|
|
GValue *value,
|
|
GParamSpec *pspec)
|
|
{
|
|
GtkListListModel *self = GTK_LIST_LIST_MODEL (object);
|
|
|
|
switch (prop_id)
|
|
{
|
|
case PROP_ITEM_TYPE:
|
|
g_value_set_gtype (value, G_TYPE_OBJECT);
|
|
break;
|
|
|
|
case PROP_N_ITEMS:
|
|
g_value_set_uint (value, self->n_items);
|
|
break;
|
|
|
|
default:
|
|
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
|
|
break;
|
|
}
|
|
}
|
|
|
|
static void
|
|
gtk_list_list_model_dispose (GObject *object)
|
|
{
|
|
GtkListListModel *self = GTK_LIST_LIST_MODEL (object);
|
|
|
|
if (self->notify)
|
|
self->notify (self->data);
|
|
|
|
self->n_items = 0;
|
|
self->notify = NULL;
|
|
|
|
G_OBJECT_CLASS (gtk_list_list_model_parent_class)->dispose (object);
|
|
}
|
|
|
|
static void
|
|
gtk_list_list_model_class_init (GtkListListModelClass *klass)
|
|
{
|
|
GObjectClass *object_class = G_OBJECT_CLASS (klass);
|
|
|
|
object_class->get_property = gtk_list_list_model_get_property;
|
|
object_class->dispose = gtk_list_list_model_dispose;
|
|
|
|
properties[PROP_ITEM_TYPE] =
|
|
g_param_spec_gtype ("item-type", NULL, NULL,
|
|
G_TYPE_OBJECT,
|
|
G_PARAM_READABLE | G_PARAM_STATIC_STRINGS);
|
|
|
|
properties[PROP_N_ITEMS] =
|
|
g_param_spec_uint ("n-items", NULL, NULL,
|
|
0, G_MAXUINT, 0,
|
|
G_PARAM_READABLE | G_PARAM_STATIC_STRINGS);
|
|
|
|
g_object_class_install_properties (object_class, N_PROPS, properties);
|
|
}
|
|
|
|
static void
|
|
gtk_list_list_model_init (GtkListListModel *self)
|
|
{
|
|
}
|
|
|
|
GtkListListModel *
|
|
gtk_list_list_model_new (gpointer (* get_first) (gpointer),
|
|
gpointer (* get_next) (gpointer, gpointer),
|
|
gpointer (* get_previous) (gpointer, gpointer),
|
|
gpointer (* get_last) (gpointer),
|
|
gpointer (* get_item) (gpointer, gpointer),
|
|
gpointer data,
|
|
GDestroyNotify notify)
|
|
{
|
|
guint n_items;
|
|
gpointer item;
|
|
|
|
n_items = 0;
|
|
for (item = get_first (data);
|
|
item != NULL;
|
|
item = get_next (item, data))
|
|
n_items++;
|
|
|
|
return gtk_list_list_model_new_with_size (n_items,
|
|
get_first,
|
|
get_next,
|
|
get_previous,
|
|
get_last,
|
|
get_item,
|
|
data,
|
|
notify);
|
|
}
|
|
|
|
GtkListListModel *
|
|
gtk_list_list_model_new_with_size (guint n_items,
|
|
gpointer (* get_first) (gpointer),
|
|
gpointer (* get_next) (gpointer, gpointer),
|
|
gpointer (* get_previous) (gpointer, gpointer),
|
|
gpointer (* get_last) (gpointer),
|
|
gpointer (* get_item) (gpointer, gpointer),
|
|
gpointer data,
|
|
GDestroyNotify notify)
|
|
{
|
|
GtkListListModel *result;
|
|
|
|
g_return_val_if_fail (get_first != NULL, NULL);
|
|
g_return_val_if_fail (get_next != NULL, NULL);
|
|
g_return_val_if_fail (get_previous != NULL, NULL);
|
|
g_return_val_if_fail (get_item != NULL, NULL);
|
|
|
|
result = g_object_new (GTK_TYPE_LIST_LIST_MODEL, NULL);
|
|
|
|
result->n_items = n_items;
|
|
result->get_first = get_first;
|
|
result->get_next = get_next;
|
|
result->get_previous = get_previous;
|
|
result->get_last = get_last;
|
|
result->get_item = get_item;
|
|
result->data = data;
|
|
result->notify = notify;
|
|
|
|
return result;
|
|
}
|
|
|
|
static guint
|
|
gtk_list_list_model_find (GtkListListModel *self,
|
|
gpointer item)
|
|
{
|
|
guint position;
|
|
gpointer x;
|
|
|
|
position = 0;
|
|
for (x = self->get_first (self->data);
|
|
x != item;
|
|
x = self->get_next (x, self->data))
|
|
position++;
|
|
|
|
return position;
|
|
}
|
|
|
|
void
|
|
gtk_list_list_model_item_added (GtkListListModel *self,
|
|
gpointer item)
|
|
{
|
|
g_return_if_fail (GTK_IS_LIST_LIST_MODEL (self));
|
|
g_return_if_fail (item != NULL);
|
|
|
|
gtk_list_list_model_item_added_at (self, gtk_list_list_model_find (self, item));
|
|
}
|
|
|
|
void
|
|
gtk_list_list_model_item_added_at (GtkListListModel *self,
|
|
guint position)
|
|
{
|
|
g_return_if_fail (GTK_IS_LIST_LIST_MODEL (self));
|
|
g_return_if_fail (position <= self->n_items);
|
|
|
|
self->n_items += 1;
|
|
|
|
g_list_model_items_changed (G_LIST_MODEL (self), position, 0, 1);
|
|
g_object_notify_by_pspec (G_OBJECT (self), properties[PROP_N_ITEMS]);
|
|
}
|
|
|
|
void
|
|
gtk_list_list_model_item_removed (GtkListListModel *self,
|
|
gpointer previous)
|
|
{
|
|
guint position;
|
|
|
|
g_return_if_fail (GTK_IS_LIST_LIST_MODEL (self));
|
|
|
|
if (previous == NULL)
|
|
position = 0;
|
|
else
|
|
position = 1 + gtk_list_list_model_find (self, previous);
|
|
|
|
gtk_list_list_model_item_removed_at (self, position);
|
|
}
|
|
|
|
void
|
|
gtk_list_list_model_item_moved (GtkListListModel *self,
|
|
gpointer item,
|
|
gpointer previous_previous)
|
|
{
|
|
guint position, previous_position;
|
|
guint min, max;
|
|
|
|
g_return_if_fail (GTK_IS_LIST_LIST_MODEL (self));
|
|
g_return_if_fail (item != previous_previous);
|
|
|
|
position = gtk_list_list_model_find (self, item);
|
|
|
|
if (previous_previous == NULL)
|
|
{
|
|
previous_position = 0;
|
|
}
|
|
else
|
|
{
|
|
previous_position = gtk_list_list_model_find (self, previous_previous);
|
|
if (position > previous_position)
|
|
previous_position++;
|
|
}
|
|
|
|
/* item didn't move */
|
|
if (position == previous_position)
|
|
return;
|
|
|
|
min = MIN (position, previous_position);
|
|
max = MAX (position, previous_position) + 1;
|
|
g_list_model_items_changed (G_LIST_MODEL (self), min, max - min, max - min);
|
|
}
|
|
|
|
void
|
|
gtk_list_list_model_item_removed_at (GtkListListModel *self,
|
|
guint position)
|
|
{
|
|
g_return_if_fail (GTK_IS_LIST_LIST_MODEL (self));
|
|
g_return_if_fail (position < self->n_items);
|
|
|
|
self->n_items -= 1;
|
|
|
|
g_list_model_items_changed (G_LIST_MODEL (self), position, 1, 0);
|
|
g_object_notify_by_pspec (G_OBJECT (self), properties[PROP_N_ITEMS]);
|
|
}
|
|
|
|
void
|
|
gtk_list_list_model_clear (GtkListListModel *self)
|
|
{
|
|
guint n_items;
|
|
|
|
g_return_if_fail (GTK_IS_LIST_LIST_MODEL (self));
|
|
|
|
n_items = self->n_items;
|
|
|
|
if (self->notify)
|
|
self->notify (self->data);
|
|
|
|
self->n_items = 0;
|
|
self->notify = NULL;
|
|
|
|
if (n_items > 0)
|
|
{
|
|
g_list_model_items_changed (G_LIST_MODEL (self), 0, n_items, 0);
|
|
g_object_notify_by_pspec (G_OBJECT (self), properties[PROP_N_ITEMS]);
|
|
}
|
|
}
|
|
|
|
|