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39cd766e8e
Note: Since we export types with Iface in the name rather than Interface we have to use some typedefs to make this work. New interfaces should probably use Interface as the public name.
245 lines
6.9 KiB
C
245 lines
6.9 KiB
C
/* GIO - GLib Input, Output and Streaming Library
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*
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* Copyright (C) 2006-2007 Red Hat, Inc.
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General
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* Public License along with this library; if not, write to the
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* Free Software Foundation, Inc., 59 Temple Place, Suite 330,
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* Boston, MA 02111-1307, USA.
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*
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* Author: Alexander Larsson <alexl@redhat.com>
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*/
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#include "config.h"
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#include "gasyncresult.h"
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#include "gsimpleasyncresult.h"
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#include "gicon.h"
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#include "gloadableicon.h"
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#include "glibintl.h"
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#include "gioalias.h"
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/**
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* SECTION:gloadableicon
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* @short_description: Loadable Icons
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* @include: gio/gio.h
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* @see_also: #GIcon, #GThemedIcon
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*
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* Extends the #GIcon interface and adds the ability to
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* load icons from streams.
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**/
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static void g_loadable_icon_real_load_async (GLoadableIcon *icon,
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int size,
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GCancellable *cancellable,
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GAsyncReadyCallback callback,
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gpointer user_data);
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static GInputStream *g_loadable_icon_real_load_finish (GLoadableIcon *icon,
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GAsyncResult *res,
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char **type,
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GError **error);
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typedef GLoadableIconIface GLoadableIconInterface;
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G_DEFINE_INTERFACE(GLoadableIcon, g_loadable_icon, G_TYPE_ICON)
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static void
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g_loadable_icon_default_init (GLoadableIconIface *iface)
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{
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iface->load_async = g_loadable_icon_real_load_async;
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iface->load_finish = g_loadable_icon_real_load_finish;
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}
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/**
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* g_loadable_icon_load:
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* @icon: a #GLoadableIcon.
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* @size: an integer.
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* @type: a location to store the type of the loaded icon, %NULL to ignore.
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* @cancellable: optional #GCancellable object, %NULL to ignore.
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* @error: a #GError location to store the error occuring, or %NULL to
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* ignore.
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*
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* Loads a loadable icon. For the asynchronous version of this function,
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* see g_loadable_icon_load_async().
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*
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* Returns: a #GInputStream to read the icon from.
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**/
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GInputStream *
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g_loadable_icon_load (GLoadableIcon *icon,
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int size,
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char **type,
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GCancellable *cancellable,
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GError **error)
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{
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GLoadableIconIface *iface;
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g_return_val_if_fail (G_IS_LOADABLE_ICON (icon), NULL);
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iface = G_LOADABLE_ICON_GET_IFACE (icon);
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return (* iface->load) (icon, size, type, cancellable, error);
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}
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/**
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* g_loadable_icon_load_async:
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* @icon: a #GLoadableIcon.
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* @size: an integer.
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* @cancellable: optional #GCancellable object, %NULL to ignore.
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* @callback: a #GAsyncReadyCallback to call when the request is satisfied
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* @user_data: the data to pass to callback function
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*
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* Loads an icon asynchronously. To finish this function, see
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* g_loadable_icon_load_finish(). For the synchronous, blocking
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* version of this function, see g_loadable_icon_load().
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**/
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void
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g_loadable_icon_load_async (GLoadableIcon *icon,
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int size,
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GCancellable *cancellable,
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GAsyncReadyCallback callback,
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gpointer user_data)
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{
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GLoadableIconIface *iface;
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g_return_if_fail (G_IS_LOADABLE_ICON (icon));
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iface = G_LOADABLE_ICON_GET_IFACE (icon);
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(* iface->load_async) (icon, size, cancellable, callback, user_data);
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}
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/**
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* g_loadable_icon_load_finish:
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* @icon: a #GLoadableIcon.
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* @res: a #GAsyncResult.
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* @type: a location to store the type of the loaded icon, %NULL to ignore.
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* @error: a #GError location to store the error occuring, or %NULL to
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* ignore.
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*
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* Finishes an asynchronous icon load started in g_loadable_icon_load_async().
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*
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* Returns: a #GInputStream to read the icon from.
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**/
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GInputStream *
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g_loadable_icon_load_finish (GLoadableIcon *icon,
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GAsyncResult *res,
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char **type,
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GError **error)
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{
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GLoadableIconIface *iface;
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g_return_val_if_fail (G_IS_LOADABLE_ICON (icon), NULL);
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g_return_val_if_fail (G_IS_ASYNC_RESULT (res), NULL);
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if (G_IS_SIMPLE_ASYNC_RESULT (res))
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{
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GSimpleAsyncResult *simple = G_SIMPLE_ASYNC_RESULT (res);
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if (g_simple_async_result_propagate_error (simple, error))
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return NULL;
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}
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iface = G_LOADABLE_ICON_GET_IFACE (icon);
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return (* iface->load_finish) (icon, res, type, error);
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}
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/********************************************
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* Default implementation of async load *
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********************************************/
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typedef struct {
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int size;
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char *type;
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GInputStream *stream;
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} LoadData;
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static void
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load_data_free (LoadData *data)
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{
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if (data->stream)
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g_object_unref (data->stream);
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g_free (data->type);
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g_free (data);
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}
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static void
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load_async_thread (GSimpleAsyncResult *res,
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GObject *object,
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GCancellable *cancellable)
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{
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GLoadableIconIface *iface;
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GInputStream *stream;
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LoadData *data;
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GError *error = NULL;
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char *type = NULL;
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data = g_simple_async_result_get_op_res_gpointer (res);
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iface = G_LOADABLE_ICON_GET_IFACE (object);
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stream = iface->load (G_LOADABLE_ICON (object), data->size, &type, cancellable, &error);
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if (stream == NULL)
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{
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g_simple_async_result_set_from_error (res, error);
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g_error_free (error);
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}
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else
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{
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data->stream = stream;
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data->type = type;
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}
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}
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static void
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g_loadable_icon_real_load_async (GLoadableIcon *icon,
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int size,
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GCancellable *cancellable,
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GAsyncReadyCallback callback,
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gpointer user_data)
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{
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GSimpleAsyncResult *res;
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LoadData *data;
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res = g_simple_async_result_new (G_OBJECT (icon), callback, user_data, g_loadable_icon_real_load_async);
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data = g_new0 (LoadData, 1);
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g_simple_async_result_set_op_res_gpointer (res, data, (GDestroyNotify) load_data_free);
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g_simple_async_result_run_in_thread (res, load_async_thread, 0, cancellable);
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g_object_unref (res);
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}
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static GInputStream *
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g_loadable_icon_real_load_finish (GLoadableIcon *icon,
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GAsyncResult *res,
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char **type,
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GError **error)
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{
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GSimpleAsyncResult *simple = G_SIMPLE_ASYNC_RESULT (res);
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LoadData *data;
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g_warn_if_fail (g_simple_async_result_get_source_tag (simple) == g_loadable_icon_real_load_async);
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data = g_simple_async_result_get_op_res_gpointer (simple);
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if (type)
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{
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*type = data->type;
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data->type = NULL;
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}
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return g_object_ref (data->stream);
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}
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#define __G_LOADABLE_ICON_C__
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#include "gioaliasdef.c"
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