| /* GIO - GLib Input, Output and Streaming Library |
| * |
| * Copyright (C) 2006-2007 Red Hat, Inc. |
| * |
| * 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 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, write to the |
| * Free Software Foundation, Inc., 59 Temple Place, Suite 330, |
| * Boston, MA 02111-1307, USA. |
| * |
| * Author: Alexander Larsson <alexl@redhat.com> |
| */ |
| |
| #include <config.h> |
| #include "gsimpleasyncresult.h" |
| #include "gloadableicon.h" |
| #include "glibintl.h" |
| |
| #include "gioalias.h" |
| |
| /** |
| * SECTION:gloadableicon |
| * @short_description: Loadable Icons |
| * @include: gio.h |
| * @see_also: #GIcon, #GThemedIcon |
| * |
| * Extends the #GIcon interface and adds the ability to |
| * load icons from streams. |
| **/ |
| |
| static void g_loadable_icon_real_load_async (GLoadableIcon *icon, |
| int size, |
| GCancellable *cancellable, |
| GAsyncReadyCallback callback, |
| gpointer user_data); |
| static GInputStream *g_loadable_icon_real_load_finish (GLoadableIcon *icon, |
| GAsyncResult *res, |
| char **type, |
| GError **error); |
| static void g_loadable_icon_base_init (gpointer g_class); |
| static void g_loadable_icon_class_init (gpointer g_class, |
| gpointer class_data); |
| |
| GType |
| g_loadable_icon_get_type (void) |
| { |
| static GType loadable_icon_type = 0; |
| |
| if (! loadable_icon_type) |
| { |
| static const GTypeInfo loadable_icon_info = |
| { |
| sizeof (GLoadableIconIface), /* class_size */ |
| g_loadable_icon_base_init, /* base_init */ |
| NULL, /* base_finalize */ |
| g_loadable_icon_class_init, |
| NULL, /* class_finalize */ |
| NULL, /* class_data */ |
| 0, |
| 0, /* n_preallocs */ |
| NULL |
| }; |
| |
| loadable_icon_type = |
| g_type_register_static (G_TYPE_INTERFACE, I_("GLoadableIcon"), |
| &loadable_icon_info, 0); |
| |
| g_type_interface_add_prerequisite (loadable_icon_type, G_TYPE_ICON); |
| } |
| |
| return loadable_icon_type; |
| } |
| |
| static void |
| g_loadable_icon_class_init (gpointer g_class, |
| gpointer class_data) |
| { |
| GLoadableIconIface *iface = g_class; |
| |
| iface->load_async = g_loadable_icon_real_load_async; |
| iface->load_finish = g_loadable_icon_real_load_finish; |
| } |
| |
| static void |
| g_loadable_icon_base_init (gpointer g_class) |
| { |
| } |
| |
| /** |
| * g_loadable_icon_load: |
| * @icon: a #GLoadableIcon. |
| * @size: an integer. |
| * @type: a location to store the type of the loaded icon, %NULL to ignore. |
| * @cancellable: optional #GCancellable object, %NULL to ignore. |
| * @error: a #GError location to store the error occuring, or %NULL to |
| * ignore. |
| * |
| * Loads a loadable icon. For the asynchronous version of this function, |
| * see g_loadable_icon_load_async(). |
| * |
| * Returns: a #GInputStream to read the icon from. |
| **/ |
| GInputStream * |
| g_loadable_icon_load (GLoadableIcon *icon, |
| int size, |
| char **type, |
| GCancellable *cancellable, |
| GError **error) |
| { |
| GLoadableIconIface *iface; |
| |
| g_return_val_if_fail (G_IS_LOADABLE_ICON (icon), NULL); |
| |
| iface = G_LOADABLE_ICON_GET_IFACE (icon); |
| |
| return (* iface->load) (icon, size, type, cancellable, error); |
| } |
| |
| /** |
| * g_loadable_icon_load_async: |
| * @icon: a #GLoadableIcon. |
| * @size: an integer. |
| * @cancellable: optional #GCancellable object, %NULL to ignore. |
| * @callback: a #GAsyncReadyCallback to call when the request is satisfied |
| * @user_data: the data to pass to callback function |
| * |
| * Loads an icon asynchronously. To finish this function, see |
| * g_loadable_icon_load_finish(). For the synchronous, blocking |
| * version of this function, see g_loadable_icon_load(). |
| **/ |
| void |
| g_loadable_icon_load_async (GLoadableIcon *icon, |
| int size, |
| GCancellable *cancellable, |
| GAsyncReadyCallback callback, |
| gpointer user_data) |
| { |
| GLoadableIconIface *iface; |
| |
| g_return_if_fail (G_IS_LOADABLE_ICON (icon)); |
| |
| iface = G_LOADABLE_ICON_GET_IFACE (icon); |
| |
| (* iface->load_async) (icon, size, cancellable, callback, user_data); |
| } |
| |
| /** |
| * g_loadable_icon_load_finish: |
| * @icon: a #GLoadableIcon. |
| * @res: a #GAsyncResult. |
| * @type: a location to store the type of the loaded icon, %NULL to ignore. |
| * @error: a #GError location to store the error occuring, or %NULL to |
| * ignore. |
| * |
| * Finishes an asynchronous icon load started in g_loadable_icon_load_async(). |
| * |
| * Returns: a #GInputStream to read the icon from. |
| **/ |
| GInputStream * |
| g_loadable_icon_load_finish (GLoadableIcon *icon, |
| GAsyncResult *res, |
| char **type, |
| GError **error) |
| { |
| GLoadableIconIface *iface; |
| |
| g_return_val_if_fail (G_IS_LOADABLE_ICON (icon), NULL); |
| g_return_val_if_fail (G_IS_ASYNC_RESULT (res), NULL); |
| |
| if (G_IS_SIMPLE_ASYNC_RESULT (res)) |
| { |
| GSimpleAsyncResult *simple = G_SIMPLE_ASYNC_RESULT (res); |
| if (g_simple_async_result_propagate_error (simple, error)) |
| return NULL; |
| } |
| |
| iface = G_LOADABLE_ICON_GET_IFACE (icon); |
| |
| return (* iface->load_finish) (icon, res, type, error); |
| } |
| |
| /******************************************** |
| * Default implementation of async load * |
| ********************************************/ |
| |
| typedef struct { |
| int size; |
| char *type; |
| GInputStream *stream; |
| } LoadData; |
| |
| static void |
| load_data_free (LoadData *data) |
| { |
| if (data->stream) |
| g_object_unref (data->stream); |
| g_free (data->type); |
| g_free (data); |
| } |
| |
| static void |
| load_async_thread (GSimpleAsyncResult *res, |
| GObject *object, |
| GCancellable *cancellable) |
| { |
| GLoadableIconIface *iface; |
| GInputStream *stream; |
| LoadData *data; |
| GError *error = NULL; |
| char *type = NULL; |
| |
| data = g_simple_async_result_get_op_res_gpointer (res); |
| |
| iface = G_LOADABLE_ICON_GET_IFACE (object); |
| stream = iface->load (G_LOADABLE_ICON (object), data->size, &type, cancellable, &error); |
| |
| if (stream == NULL) |
| { |
| g_simple_async_result_set_from_error (res, error); |
| g_error_free (error); |
| } |
| else |
| { |
| data->stream = stream; |
| data->type = type; |
| } |
| } |
| |
| |
| |
| static void |
| g_loadable_icon_real_load_async (GLoadableIcon *icon, |
| int size, |
| GCancellable *cancellable, |
| GAsyncReadyCallback callback, |
| gpointer user_data) |
| { |
| GSimpleAsyncResult *res; |
| LoadData *data; |
| |
| res = g_simple_async_result_new (G_OBJECT (icon), callback, user_data, g_loadable_icon_real_load_async); |
| data = g_new0 (LoadData, 1); |
| g_simple_async_result_set_op_res_gpointer (res, data, (GDestroyNotify) load_data_free); |
| g_simple_async_result_run_in_thread (res, load_async_thread, 0, cancellable); |
| g_object_unref (res); |
| } |
| |
| static GInputStream * |
| g_loadable_icon_real_load_finish (GLoadableIcon *icon, |
| GAsyncResult *res, |
| char **type, |
| GError **error) |
| { |
| GSimpleAsyncResult *simple = G_SIMPLE_ASYNC_RESULT (res); |
| LoadData *data; |
| |
| g_warn_if_fail (g_simple_async_result_get_source_tag (simple) == g_loadable_icon_real_load_async); |
| |
| data = g_simple_async_result_get_op_res_gpointer (simple); |
| |
| if (type) |
| { |
| *type = data->type; |
| data->type = NULL; |
| } |
| |
| return g_object_ref (data->stream); |
| } |
| |
| #define __G_LOADABLE_ICON_C__ |
| #include "gioaliasdef.c" |