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glib/gio/gfileicon.c

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/* 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 "gfileicon.h"
#include "gfile.h"
#include "gicon.h"
#include "glibintl.h"
#include "gloadableicon.h"
#include "ginputstream.h"
#include "gsimpleasyncresult.h"
#include "gioerror.h"
/**
* SECTION:gfileicon
* @short_description: Icons pointing to an image file
* @include: gio/gio.h
* @see_also: #GIcon, #GLoadableIcon
*
* #GFileIcon specifies an icon by pointing to an image file
* to be used as icon.
*
**/
static void g_file_icon_icon_iface_init (GIconIface *iface);
static void g_file_icon_loadable_icon_iface_init (GLoadableIconIface *iface);
static void g_file_icon_load_async (GLoadableIcon *icon,
int size,
GCancellable *cancellable,
GAsyncReadyCallback callback,
gpointer user_data);
struct _GFileIcon
{
GObject parent_instance;
GFile *file;
};
struct _GFileIconClass
{
GObjectClass parent_class;
};
enum
{
PROP_0,
PROP_FILE
};
G_DEFINE_TYPE_WITH_CODE (GFileIcon, g_file_icon, G_TYPE_OBJECT,
G_IMPLEMENT_INTERFACE (G_TYPE_ICON,
g_file_icon_icon_iface_init)
G_IMPLEMENT_INTERFACE (G_TYPE_LOADABLE_ICON,
g_file_icon_loadable_icon_iface_init))
static void
g_file_icon_get_property (GObject *object,
guint prop_id,
GValue *value,
GParamSpec *pspec)
{
GFileIcon *icon = G_FILE_ICON (object);
switch (prop_id)
{
case PROP_FILE:
g_value_set_object (value, icon->file);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
}
}
static void
g_file_icon_set_property (GObject *object,
guint prop_id,
const GValue *value,
GParamSpec *pspec)
{
GFileIcon *icon = G_FILE_ICON (object);
switch (prop_id)
{
case PROP_FILE:
icon->file = G_FILE (g_value_dup_object (value));
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
}
}
static void
g_file_icon_finalize (GObject *object)
{
GFileIcon *icon;
icon = G_FILE_ICON (object);
g_object_unref (icon->file);
G_OBJECT_CLASS (g_file_icon_parent_class)->finalize (object);
}
static void
g_file_icon_class_init (GFileIconClass *klass)
{
GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
gobject_class->get_property = g_file_icon_get_property;
gobject_class->set_property = g_file_icon_set_property;
gobject_class->finalize = g_file_icon_finalize;
/**
* GFileIcon:file:
*
* The file containing the icon.
*/
g_object_class_install_property (gobject_class, PROP_FILE,
g_param_spec_object ("file",
P_("file"),
P_("The file containing the icon"),
G_TYPE_FILE,
G_PARAM_CONSTRUCT_ONLY | G_PARAM_READWRITE | G_PARAM_STATIC_NAME | G_PARAM_STATIC_BLURB | G_PARAM_STATIC_NICK));
}
static void
g_file_icon_init (GFileIcon *file)
{
}
/**
* g_file_icon_new:
* @file: a #GFile.
*
* Creates a new icon for a file.
*
* Returns: (transfer full) (type GFileIcon): a #GIcon for the given
* @file, or %NULL on error.
**/
GIcon *
g_file_icon_new (GFile *file)
{
g_return_val_if_fail (G_IS_FILE (file), NULL);
return G_ICON (g_object_new (G_TYPE_FILE_ICON, "file", file, NULL));
}
/**
* g_file_icon_get_file:
* @icon: a #GIcon.
*
* Gets the #GFile associated with the given @icon.
*
* Returns: (transfer none): a #GFile, or %NULL.
**/
GFile *
g_file_icon_get_file (GFileIcon *icon)
{
g_return_val_if_fail (G_IS_FILE_ICON (icon), NULL);
return icon->file;
}
static guint
g_file_icon_hash (GIcon *icon)
{
GFileIcon *file_icon = G_FILE_ICON (icon);
return g_file_hash (file_icon->file);
}
static gboolean
g_file_icon_equal (GIcon *icon1,
GIcon *icon2)
{
GFileIcon *file1 = G_FILE_ICON (icon1);
GFileIcon *file2 = G_FILE_ICON (icon2);
return g_file_equal (file1->file, file2->file);
}
static gboolean
g_file_icon_to_tokens (GIcon *icon,
GPtrArray *tokens,
gint *out_version)
{
GFileIcon *file_icon = G_FILE_ICON (icon);
g_return_val_if_fail (out_version != NULL, FALSE);
*out_version = 0;
g_ptr_array_add (tokens, g_file_get_uri (file_icon->file));
return TRUE;
}
static GIcon *
g_file_icon_from_tokens (gchar **tokens,
gint num_tokens,
gint version,
GError **error)
{
GIcon *icon;
GFile *file;
icon = NULL;
if (version != 0)
{
g_set_error (error,
G_IO_ERROR,
G_IO_ERROR_INVALID_ARGUMENT,
_("Can't handle version %d of GFileIcon encoding"),
version);
goto out;
}
if (num_tokens != 1)
{
g_set_error_literal (error,
G_IO_ERROR,
G_IO_ERROR_INVALID_ARGUMENT,
_("Malformed input data for GFileIcon"));
goto out;
}
file = g_file_new_for_uri (tokens[0]);
icon = g_file_icon_new (file);
g_object_unref (file);
out:
return icon;
}
static void
g_file_icon_icon_iface_init (GIconIface *iface)
{
iface->hash = g_file_icon_hash;
iface->equal = g_file_icon_equal;
iface->to_tokens = g_file_icon_to_tokens;
iface->from_tokens = g_file_icon_from_tokens;
}
static GInputStream *
g_file_icon_load (GLoadableIcon *icon,
int size,
char **type,
GCancellable *cancellable,
GError **error)
{
GFileInputStream *stream;
GFileIcon *file_icon = G_FILE_ICON (icon);
stream = g_file_read (file_icon->file,
cancellable,
error);
return G_INPUT_STREAM (stream);
}
typedef struct {
GLoadableIcon *icon;
GAsyncReadyCallback callback;
gpointer user_data;
} LoadData;
static void
load_data_free (LoadData *data)
{
g_object_unref (data->icon);
g_free (data);
}
static void
load_async_callback (GObject *source_object,
GAsyncResult *res,
gpointer user_data)
{
GFileInputStream *stream;
GError *error = NULL;
GSimpleAsyncResult *simple;
LoadData *data = user_data;
stream = g_file_read_finish (G_FILE (source_object), res, &error);
if (stream == NULL)
{
simple = g_simple_async_result_new_take_error (G_OBJECT (data->icon),
data->callback,
data->user_data,
error);
}
else
{
simple = g_simple_async_result_new (G_OBJECT (data->icon),
data->callback,
data->user_data,
g_file_icon_load_async);
g_simple_async_result_set_op_res_gpointer (simple,
stream,
g_object_unref);
}
g_simple_async_result_complete (simple);
load_data_free (data);
g_object_unref (simple);
}
static void
g_file_icon_load_async (GLoadableIcon *icon,
int size,
GCancellable *cancellable,
GAsyncReadyCallback callback,
gpointer user_data)
{
GFileIcon *file_icon = G_FILE_ICON (icon);
LoadData *data;
data = g_new0 (LoadData, 1);
data->icon = g_object_ref (icon);
data->callback = callback;
data->user_data = user_data;
g_file_read_async (file_icon->file, 0,
cancellable,
load_async_callback, data);
}
static GInputStream *
g_file_icon_load_finish (GLoadableIcon *icon,
GAsyncResult *res,
char **type,
GError **error)
{
GSimpleAsyncResult *simple = G_SIMPLE_ASYNC_RESULT (res);
gpointer op;
g_warn_if_fail (g_simple_async_result_get_source_tag (simple) == g_file_icon_load_async);
if (type)
*type = NULL;
op = g_simple_async_result_get_op_res_gpointer (simple);
if (op)
return g_object_ref (op);
return NULL;
}
static void
g_file_icon_loadable_icon_iface_init (GLoadableIconIface *iface)
{
iface->load = g_file_icon_load;
iface->load_async = g_file_icon_load_async;
iface->load_finish = g_file_icon_load_finish;
}
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