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Introduce GBytesIcon
GBytesIcon is an icon that has a GBytes inside of it where the GBytes contains some sort of encoded image in a widely-recognised file format. Ideally this will be a PNG. It implements GLoadableIcon, so GTK will already understand how to use it, but we will add another patch there to make things more efficient. https://bugzilla.gnome.org/show_bug.cgi?id=688820
This commit is contained in:
Ryan Lortie
253
gio/gbytesicon.c
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253
gio/gbytesicon.c
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/* GIO - GLib Input, Output and Streaming Library
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*
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* Copyright © 2013 Canonical Limited
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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: Ryan Lortie <desrt@desrt.ca>
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*/
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#include "config.h"
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#include "gbytesicon.h"
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#include "gbytes.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 "gmemoryinputstream.h"
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#include "gtask.h"
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#include "gioerror.h"
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/**
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* SECTION:gbytesicon
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* @short_description: An icon stored in memory as a #GBytes
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* @include: gio/gio.h
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* @see_also: #GIcon, #GLoadableIcon, #GBytes
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*
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* #GBytesIcon specifies an image held in memory in a common format (usually
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* png) to be used as icon.
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*
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* Since: 2.38
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**/
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typedef GObjectClass GBytesIconClass;
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struct _GBytesIcon
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{
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GObject parent_instance;
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GBytes *bytes;
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};
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enum
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{
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PROP_0,
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PROP_BYTES
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};
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static void g_bytes_icon_icon_iface_init (GIconIface *iface);
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static void g_bytes_icon_loadable_icon_iface_init (GLoadableIconIface *iface);
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G_DEFINE_TYPE_WITH_CODE (GBytesIcon, g_bytes_icon, G_TYPE_OBJECT,
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G_IMPLEMENT_INTERFACE (G_TYPE_ICON, g_bytes_icon_icon_iface_init)
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G_IMPLEMENT_INTERFACE (G_TYPE_LOADABLE_ICON, g_bytes_icon_loadable_icon_iface_init))
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static void
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g_bytes_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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GBytesIcon *icon = G_BYTES_ICON (object);
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switch (prop_id)
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{
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case PROP_BYTES:
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g_value_set_boxed (value, icon->bytes);
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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_bytes_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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GBytesIcon *icon = G_BYTES_ICON (object);
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switch (prop_id)
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{
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case PROP_BYTES:
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icon->bytes = g_value_dup_boxed (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_bytes_icon_finalize (GObject *object)
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{
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GBytesIcon *icon;
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icon = G_BYTES_ICON (object);
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g_object_unref (icon->bytes);
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G_OBJECT_CLASS (g_bytes_icon_parent_class)->finalize (object);
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}
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static void
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g_bytes_icon_class_init (GBytesIconClass *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_bytes_icon_get_property;
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gobject_class->set_property = g_bytes_icon_set_property;
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gobject_class->finalize = g_bytes_icon_finalize;
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/**
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* GBytesIcon:bytes:
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*
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* The bytes containing the icon.
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*/
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g_object_class_install_property (gobject_class, PROP_BYTES,
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g_param_spec_boxed ("bytes",
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P_("bytes"),
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P_("The bytes containing the icon"),
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G_TYPE_BYTES,
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G_PARAM_CONSTRUCT_ONLY | G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
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}
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static void
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g_bytes_icon_init (GBytesIcon *bytes)
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{
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}
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/**
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* g_bytes_icon_new:
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* @bytes: a #GBytes.
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*
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* Creates a new icon for a bytes.
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*
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* Returns: (transfer full) (type GBytesIcon): a #GIcon for the given
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* @bytes, or %NULL on error.
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*
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* Since: 2.38
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**/
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GIcon *
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g_bytes_icon_new (GBytes *bytes)
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{
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g_return_val_if_fail (bytes != NULL, NULL);
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return g_object_new (G_TYPE_BYTES_ICON, "bytes", bytes, NULL);
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}
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/**
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* g_bytes_icon_get_bytes:
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* @icon: a #GIcon.
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*
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* Gets the #GBytes associated with the given @icon.
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*
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* Returns: (transfer none): a #GBytes, or %NULL.
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*
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* Since: 2.38
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**/
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GBytes *
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g_bytes_icon_get_bytes (GBytesIcon *icon)
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{
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g_return_val_if_fail (G_IS_BYTES_ICON (icon), NULL);
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return icon->bytes;
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}
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static guint
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g_bytes_icon_hash (GIcon *icon)
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{
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GBytesIcon *bytes_icon = G_BYTES_ICON (icon);
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return g_bytes_hash (bytes_icon->bytes);
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}
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static gboolean
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g_bytes_icon_equal (GIcon *icon1,
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GIcon *icon2)
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{
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GBytesIcon *bytes1 = G_BYTES_ICON (icon1);
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GBytesIcon *bytes2 = G_BYTES_ICON (icon2);
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return g_bytes_equal (bytes1->bytes, bytes2->bytes);
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}
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static void
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g_bytes_icon_icon_iface_init (GIconIface *iface)
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{
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iface->hash = g_bytes_icon_hash;
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iface->equal = g_bytes_icon_equal;
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}
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static GInputStream *
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g_bytes_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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GBytesIcon *bytes_icon = G_BYTES_ICON (icon);
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return g_memory_input_stream_new_from_bytes (bytes_icon->bytes);
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}
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static void
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g_bytes_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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GBytesIcon *bytes_icon = G_BYTES_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_return_pointer (task, g_memory_input_stream_new_from_bytes (bytes_icon->bytes), g_object_unref);
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}
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static GInputStream *
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g_bytes_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_bytes_icon_loadable_icon_iface_init (GLoadableIconIface *iface)
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{
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iface->load = g_bytes_icon_load;
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iface->load_async = g_bytes_icon_load_async;
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iface->load_finish = g_bytes_icon_load_finish;
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}
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