1 /* GIO - GLib Input, Output and Streaming Library
3 * Copyright (C) 2006-2007 Red Hat, Inc.
5 * This library is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU Lesser General Public
7 * License as published by the Free Software Foundation; either
8 * version 2 of the License, or (at your option) any later version.
10 * This library is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * Lesser General Public License for more details.
15 * You should have received a copy of the GNU Lesser General
16 * Public License along with this library; if not, write to the
17 * Free Software Foundation, Inc., 59 Temple Place, Suite 330,
18 * Boston, MA 02111-1307, USA.
20 * Author: Alexander Larsson <alexl@redhat.com>
24 #include "gasyncresult.h"
25 #include "gsimpleasyncresult.h"
27 #include "gloadableicon.h"
33 * SECTION:gloadableicon
34 * @short_description: Loadable Icons
36 * @see_also: #GIcon, #GThemedIcon
38 * Extends the #GIcon interface and adds the ability to
39 * load icons from streams.
42 static void g_loadable_icon_real_load_async (GLoadableIcon
*icon
,
44 GCancellable
*cancellable
,
45 GAsyncReadyCallback callback
,
47 static GInputStream
*g_loadable_icon_real_load_finish (GLoadableIcon
*icon
,
51 static void g_loadable_icon_base_init (gpointer g_class
);
52 static void g_loadable_icon_class_init (gpointer g_class
,
56 g_loadable_icon_get_type (void)
58 static GType loadable_icon_type
= 0;
60 if (! loadable_icon_type
)
62 static const GTypeInfo loadable_icon_info
=
64 sizeof (GLoadableIconIface
), /* class_size */
65 g_loadable_icon_base_init
, /* base_init */
66 NULL
, /* base_finalize */
67 g_loadable_icon_class_init
,
68 NULL
, /* class_finalize */
69 NULL
, /* class_data */
76 g_type_register_static (G_TYPE_INTERFACE
, I_("GLoadableIcon"),
77 &loadable_icon_info
, 0);
79 g_type_interface_add_prerequisite (loadable_icon_type
, G_TYPE_ICON
);
82 return loadable_icon_type
;
86 g_loadable_icon_class_init (gpointer g_class
,
89 GLoadableIconIface
*iface
= g_class
;
91 iface
->load_async
= g_loadable_icon_real_load_async
;
92 iface
->load_finish
= g_loadable_icon_real_load_finish
;
96 g_loadable_icon_base_init (gpointer g_class
)
101 * g_loadable_icon_load:
102 * @icon: a #GLoadableIcon.
104 * @type: a location to store the type of the loaded icon, %NULL to ignore.
105 * @cancellable: optional #GCancellable object, %NULL to ignore.
106 * @error: a #GError location to store the error occuring, or %NULL to
109 * Loads a loadable icon. For the asynchronous version of this function,
110 * see g_loadable_icon_load_async().
112 * Returns: a #GInputStream to read the icon from.
115 g_loadable_icon_load (GLoadableIcon
*icon
,
118 GCancellable
*cancellable
,
121 GLoadableIconIface
*iface
;
123 g_return_val_if_fail (G_IS_LOADABLE_ICON (icon
), NULL
);
125 iface
= G_LOADABLE_ICON_GET_IFACE (icon
);
127 return (* iface
->load
) (icon
, size
, type
, cancellable
, error
);
131 * g_loadable_icon_load_async:
132 * @icon: a #GLoadableIcon.
134 * @cancellable: optional #GCancellable object, %NULL to ignore.
135 * @callback: a #GAsyncReadyCallback to call when the request is satisfied
136 * @user_data: the data to pass to callback function
138 * Loads an icon asynchronously. To finish this function, see
139 * g_loadable_icon_load_finish(). For the synchronous, blocking
140 * version of this function, see g_loadable_icon_load().
143 g_loadable_icon_load_async (GLoadableIcon
*icon
,
145 GCancellable
*cancellable
,
146 GAsyncReadyCallback callback
,
149 GLoadableIconIface
*iface
;
151 g_return_if_fail (G_IS_LOADABLE_ICON (icon
));
153 iface
= G_LOADABLE_ICON_GET_IFACE (icon
);
155 (* iface
->load_async
) (icon
, size
, cancellable
, callback
, user_data
);
159 * g_loadable_icon_load_finish:
160 * @icon: a #GLoadableIcon.
161 * @res: a #GAsyncResult.
162 * @type: a location to store the type of the loaded icon, %NULL to ignore.
163 * @error: a #GError location to store the error occuring, or %NULL to
166 * Finishes an asynchronous icon load started in g_loadable_icon_load_async().
168 * Returns: a #GInputStream to read the icon from.
171 g_loadable_icon_load_finish (GLoadableIcon
*icon
,
176 GLoadableIconIface
*iface
;
178 g_return_val_if_fail (G_IS_LOADABLE_ICON (icon
), NULL
);
179 g_return_val_if_fail (G_IS_ASYNC_RESULT (res
), NULL
);
181 if (G_IS_SIMPLE_ASYNC_RESULT (res
))
183 GSimpleAsyncResult
*simple
= G_SIMPLE_ASYNC_RESULT (res
);
184 if (g_simple_async_result_propagate_error (simple
, error
))
188 iface
= G_LOADABLE_ICON_GET_IFACE (icon
);
190 return (* iface
->load_finish
) (icon
, res
, type
, error
);
193 /********************************************
194 * Default implementation of async load *
195 ********************************************/
200 GInputStream
*stream
;
204 load_data_free (LoadData
*data
)
207 g_object_unref (data
->stream
);
213 load_async_thread (GSimpleAsyncResult
*res
,
215 GCancellable
*cancellable
)
217 GLoadableIconIface
*iface
;
218 GInputStream
*stream
;
220 GError
*error
= NULL
;
223 data
= g_simple_async_result_get_op_res_gpointer (res
);
225 iface
= G_LOADABLE_ICON_GET_IFACE (object
);
226 stream
= iface
->load (G_LOADABLE_ICON (object
), data
->size
, &type
, cancellable
, &error
);
230 g_simple_async_result_set_from_error (res
, error
);
231 g_error_free (error
);
235 data
->stream
= stream
;
243 g_loadable_icon_real_load_async (GLoadableIcon
*icon
,
245 GCancellable
*cancellable
,
246 GAsyncReadyCallback callback
,
249 GSimpleAsyncResult
*res
;
252 res
= g_simple_async_result_new (G_OBJECT (icon
), callback
, user_data
, g_loadable_icon_real_load_async
);
253 data
= g_new0 (LoadData
, 1);
254 g_simple_async_result_set_op_res_gpointer (res
, data
, (GDestroyNotify
) load_data_free
);
255 g_simple_async_result_run_in_thread (res
, load_async_thread
, 0, cancellable
);
256 g_object_unref (res
);
259 static GInputStream
*
260 g_loadable_icon_real_load_finish (GLoadableIcon
*icon
,
265 GSimpleAsyncResult
*simple
= G_SIMPLE_ASYNC_RESULT (res
);
268 g_warn_if_fail (g_simple_async_result_get_source_tag (simple
) == g_loadable_icon_real_load_async
);
270 data
= g_simple_async_result_get_op_res_gpointer (simple
);
278 return g_object_ref (data
->stream
);
281 #define __G_LOADABLE_ICON_C__
282 #include "gioaliasdef.c"