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c16f914b40
Add support for serialising a GIcon to a GVariant and deserialising the result back to a GIcon. This solves a number of problems suffered by the existing to_string() API, primarily these: - not forcing the icon to be a utf8 string means that we can efficiently encode a PNG (ie: just give the array of bytes) - there is no need to ensure that proper types are loaded before using the deserialisation interface. 'Foreign' icon types will probably emit a serialised format the deserialises to a GBytesIcon. We additionally clearly document what is required for being a consumer or implementation of #GIcon. Further patches will be required to GdkPixbuf and GVfsIcon to bring their implementations in line with the new rules (essentially: introduce implementations of the new serialize() API). https://bugzilla.gnome.org/show_bug.cgi?id=688820
104 lines
3.4 KiB
C
104 lines
3.4 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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#ifndef __G_ICON_H__
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#define __G_ICON_H__
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#if !defined (__GIO_GIO_H_INSIDE__) && !defined (GIO_COMPILATION)
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#error "Only <gio/gio.h> can be included directly."
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#endif
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#include <gio/giotypes.h>
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G_BEGIN_DECLS
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#define G_TYPE_ICON (g_icon_get_type ())
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#define G_ICON(obj) (G_TYPE_CHECK_INSTANCE_CAST ((obj), G_TYPE_ICON, GIcon))
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#define G_IS_ICON(obj) (G_TYPE_CHECK_INSTANCE_TYPE ((obj), G_TYPE_ICON))
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#define G_ICON_GET_IFACE(obj) (G_TYPE_INSTANCE_GET_INTERFACE ((obj), G_TYPE_ICON, GIconIface))
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/**
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* GIcon:
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*
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* An abstract type that specifies an icon.
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**/
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typedef struct _GIconIface GIconIface;
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/**
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* GIconIface:
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* @g_iface: The parent interface.
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* @hash: A hash for a given #GIcon.
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* @equal: Checks if two #GIcon<!-- -->s are equal.
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* @to_tokens: Serializes a #GIcon into tokens. The tokens must not
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* contain any whitespace. Don't implement if the #GIcon can't be
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* serialized (Since 2.20).
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* @from_tokens: Constructs a #GIcon from tokens. Set the #GError if
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* the tokens are malformed. Don't implement if the #GIcon can't be
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* serialized (Since 2.20).
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*
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* GIconIface is used to implement GIcon types for various
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* different systems. See #GThemedIcon and #GLoadableIcon for
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* examples of how to implement this interface.
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*/
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struct _GIconIface
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{
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GTypeInterface g_iface;
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/* Virtual Table */
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guint (* hash) (GIcon *icon);
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gboolean (* equal) (GIcon *icon1,
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GIcon *icon2);
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gboolean (* to_tokens) (GIcon *icon,
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GPtrArray *tokens,
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gint *out_version);
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GIcon * (* 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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GVariant * (* serialize) (GIcon *icon);
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};
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GLIB_AVAILABLE_IN_ALL
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GType g_icon_get_type (void) G_GNUC_CONST;
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GLIB_AVAILABLE_IN_ALL
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guint g_icon_hash (gconstpointer icon);
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GLIB_AVAILABLE_IN_ALL
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gboolean g_icon_equal (GIcon *icon1,
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GIcon *icon2);
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GLIB_AVAILABLE_IN_ALL
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gchar *g_icon_to_string (GIcon *icon);
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GLIB_AVAILABLE_IN_ALL
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GIcon *g_icon_new_for_string (const gchar *str,
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GError **error);
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GLIB_AVAILABLE_IN_2_38
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GVariant * g_icon_serialize (GIcon *icon);
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GLIB_AVAILABLE_IN_2_38
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GIcon * g_icon_deserialize (GVariant *value);
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G_END_DECLS
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#endif /* __G_ICON_H__ */
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