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367 lines
8.9 KiB
C
367 lines
8.9 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 2.1 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, see <http://www.gnu.org/licenses/>.
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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 "gfileicon.h"
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#include "gfile.h"
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#include "gicon.h"
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#include "glibintl.h"
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#include "gloadableicon.h"
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#include "ginputstream.h"
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#include "gtask.h"
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#include "gioerror.h"
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/**
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* SECTION:gfileicon
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* @short_description: Icons pointing to an image file
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* @include: gio/gio.h
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* @see_also: #GIcon, #GLoadableIcon
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*
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* #GFileIcon specifies an icon by pointing to an image file
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* to be used as icon.
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*
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**/
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static void g_file_icon_icon_iface_init (GIconIface *iface);
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static void g_file_icon_loadable_icon_iface_init (GLoadableIconIface *iface);
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static void g_file_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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struct _GFileIcon
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{
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GObject parent_instance;
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GFile *file;
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};
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struct _GFileIconClass
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{
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GObjectClass parent_class;
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};
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enum
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{
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PROP_0,
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PROP_FILE
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};
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G_DEFINE_TYPE_WITH_CODE (GFileIcon, g_file_icon, G_TYPE_OBJECT,
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G_IMPLEMENT_INTERFACE (G_TYPE_ICON,
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g_file_icon_icon_iface_init)
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G_IMPLEMENT_INTERFACE (G_TYPE_LOADABLE_ICON,
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g_file_icon_loadable_icon_iface_init))
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static void
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g_file_icon_get_property (GObject *object,
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guint prop_id,
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GValue *value,
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GParamSpec *pspec)
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{
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GFileIcon *icon = G_FILE_ICON (object);
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switch (prop_id)
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{
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case PROP_FILE:
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g_value_set_object (value, icon->file);
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break;
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default:
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G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
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}
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}
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static void
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g_file_icon_set_property (GObject *object,
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guint prop_id,
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const GValue *value,
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GParamSpec *pspec)
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{
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GFileIcon *icon = G_FILE_ICON (object);
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switch (prop_id)
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{
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case PROP_FILE:
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icon->file = G_FILE (g_value_dup_object (value));
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break;
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default:
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G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
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}
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}
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static void
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g_file_icon_constructed (GObject *object)
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{
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GFileIcon *icon;
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G_OBJECT_CLASS (g_file_icon_parent_class)->constructed (object);
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icon = G_FILE_ICON (object);
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/* Must have be set during construction */
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g_assert (icon->file != NULL);
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}
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static void
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g_file_icon_finalize (GObject *object)
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{
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GFileIcon *icon;
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icon = G_FILE_ICON (object);
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if (icon->file)
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g_object_unref (icon->file);
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G_OBJECT_CLASS (g_file_icon_parent_class)->finalize (object);
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}
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static void
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g_file_icon_class_init (GFileIconClass *klass)
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{
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GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
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gobject_class->get_property = g_file_icon_get_property;
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gobject_class->set_property = g_file_icon_set_property;
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gobject_class->finalize = g_file_icon_finalize;
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gobject_class->constructed = g_file_icon_constructed;
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/**
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* GFileIcon:file:
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*
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* The file containing the icon.
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*/
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g_object_class_install_property (gobject_class, PROP_FILE,
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g_param_spec_object ("file",
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P_("file"),
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P_("The file containing the icon"),
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G_TYPE_FILE,
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G_PARAM_CONSTRUCT_ONLY | G_PARAM_READWRITE | G_PARAM_STATIC_NAME | G_PARAM_STATIC_BLURB | G_PARAM_STATIC_NICK));
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}
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static void
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g_file_icon_init (GFileIcon *file)
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{
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}
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/**
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* g_file_icon_new:
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* @file: a #GFile.
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*
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* Creates a new icon for a file.
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*
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* Returns: (transfer full) (type GFileIcon): a #GIcon for the given
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* @file, or %NULL on error.
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**/
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GIcon *
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g_file_icon_new (GFile *file)
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{
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g_return_val_if_fail (G_IS_FILE (file), NULL);
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return G_ICON (g_object_new (G_TYPE_FILE_ICON, "file", file, NULL));
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}
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/**
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* g_file_icon_get_file:
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* @icon: a #GIcon.
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*
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* Gets the #GFile associated with the given @icon.
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*
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* Returns: (transfer none): a #GFile.
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**/
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GFile *
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g_file_icon_get_file (GFileIcon *icon)
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{
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g_return_val_if_fail (G_IS_FILE_ICON (icon), NULL);
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return icon->file;
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}
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static guint
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g_file_icon_hash (GIcon *icon)
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{
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GFileIcon *file_icon = G_FILE_ICON (icon);
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return g_file_hash (file_icon->file);
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}
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static gboolean
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g_file_icon_equal (GIcon *icon1,
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GIcon *icon2)
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{
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GFileIcon *file1 = G_FILE_ICON (icon1);
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GFileIcon *file2 = G_FILE_ICON (icon2);
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return g_file_equal (file1->file, file2->file);
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}
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static gboolean
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g_file_icon_to_tokens (GIcon *icon,
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GPtrArray *tokens,
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gint *out_version)
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{
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GFileIcon *file_icon = G_FILE_ICON (icon);
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g_return_val_if_fail (out_version != NULL, FALSE);
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*out_version = 0;
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g_ptr_array_add (tokens, g_file_get_uri (file_icon->file));
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return TRUE;
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}
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static GIcon *
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g_file_icon_from_tokens (gchar **tokens,
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gint num_tokens,
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gint version,
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GError **error)
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{
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GIcon *icon;
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GFile *file;
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icon = NULL;
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if (version != 0)
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{
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g_set_error (error,
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G_IO_ERROR,
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G_IO_ERROR_INVALID_ARGUMENT,
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_("Can’t handle version %d of GFileIcon encoding"),
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version);
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goto out;
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}
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if (num_tokens != 1)
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{
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g_set_error_literal (error,
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G_IO_ERROR,
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G_IO_ERROR_INVALID_ARGUMENT,
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_("Malformed input data for GFileIcon"));
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goto out;
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}
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file = g_file_new_for_uri (tokens[0]);
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icon = g_file_icon_new (file);
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g_object_unref (file);
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out:
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return icon;
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}
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static GVariant *
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g_file_icon_serialize (GIcon *icon)
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{
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GFileIcon *file_icon = G_FILE_ICON (icon);
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return g_variant_new ("(sv)", "file", g_variant_new_take_string (g_file_get_uri (file_icon->file)));
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}
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static void
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g_file_icon_icon_iface_init (GIconIface *iface)
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{
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iface->hash = g_file_icon_hash;
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iface->equal = g_file_icon_equal;
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iface->to_tokens = g_file_icon_to_tokens;
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iface->from_tokens = g_file_icon_from_tokens;
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iface->serialize = g_file_icon_serialize;
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}
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static GInputStream *
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g_file_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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GFileInputStream *stream;
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GFileIcon *file_icon = G_FILE_ICON (icon);
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stream = g_file_read (file_icon->file,
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cancellable,
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error);
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if (stream && type)
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*type = NULL;
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return G_INPUT_STREAM (stream);
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}
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static void
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load_async_callback (GObject *source_object,
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GAsyncResult *res,
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gpointer user_data)
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{
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GFileInputStream *stream;
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GError *error = NULL;
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GTask *task = user_data;
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stream = g_file_read_finish (G_FILE (source_object), res, &error);
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if (stream == NULL)
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g_task_return_error (task, error);
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else
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g_task_return_pointer (task, stream, g_object_unref);
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g_object_unref (task);
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}
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static void
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g_file_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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GFileIcon *file_icon = G_FILE_ICON (icon);
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GTask *task;
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task = g_task_new (icon, cancellable, callback, user_data);
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g_task_set_source_tag (task, g_file_icon_load_async);
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g_file_read_async (file_icon->file, 0,
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cancellable,
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load_async_callback, task);
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}
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static GInputStream *
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g_file_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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g_return_val_if_fail (g_task_is_valid (res, icon), NULL);
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if (type)
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*type = NULL;
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return g_task_propagate_pointer (G_TASK (res), error);
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}
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static void
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g_file_icon_loadable_icon_iface_init (GLoadableIconIface *iface)
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{
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iface->load = g_file_icon_load;
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iface->load_async = g_file_icon_load_async;
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iface->load_finish = g_file_icon_load_finish;
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}
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