gio/gthemedicon.c - third_party/glib - Git at Google

 /* 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 2.1 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, see <http://www.gnu.org/licenses/>.
  *
  * Author: Alexander Larsson <alexl@redhat.com>
  */

 #include "config.h"

 #include <string.h>

 #include "gthemedicon.h"
 #include "gicon.h"
 #include "gioerror.h"
 #include "glibintl.h"


 /**
  * SECTION:gthemedicon
  * @short_description: Icon theming support
  * @include: gio/gio.h
  * @see_also: #GIcon, #GLoadableIcon
  *
  * #GThemedIcon is an implementation of #GIcon that supports icon themes.
  * #GThemedIcon contains a list of all of the icons present in an icon
  * theme, so that icons can be looked up quickly. #GThemedIcon does
  * not provide actual pixmaps for icons, just the icon names.
  * Ideally something like gtk_icon_theme_choose_icon() should be used to
  * resolve the list of names so that fallback icons work nicely with
  * themes that inherit other themes.
  **/

 static void g_themed_icon_icon_iface_init (GIconIface *iface);

 struct _GThemedIcon
 {
   GObject parent_instance;

   char     **names;
   gboolean   use_default_fallbacks;
 };

 struct _GThemedIconClass
 {
   GObjectClass parent_class;
 };

 enum
 {
   PROP_0,
   PROP_NAME,
   PROP_NAMES,
   PROP_USE_DEFAULT_FALLBACKS
 };

 G_DEFINE_TYPE_WITH_CODE (GThemedIcon, g_themed_icon, G_TYPE_OBJECT,
 			 G_IMPLEMENT_INTERFACE (G_TYPE_ICON,
 						g_themed_icon_icon_iface_init))

 static void
 g_themed_icon_get_property (GObject    *object,
                             guint       prop_id,
                             GValue     *value,
                             GParamSpec *pspec)
 {
   GThemedIcon *icon = G_THEMED_ICON (object);

   switch (prop_id)
     {
       case PROP_NAMES:
         g_value_set_boxed (value, icon->names);
         break;

       case PROP_USE_DEFAULT_FALLBACKS:
         g_value_set_boolean (value, icon->use_default_fallbacks);
         break;

       default:
         G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
     }
 }

 static void
 g_themed_icon_set_property (GObject      *object,
                             guint         prop_id,
                             const GValue *value,
                             GParamSpec   *pspec)
 {
   GThemedIcon *icon = G_THEMED_ICON (object);
   gchar **names;
   const gchar *name;

   switch (prop_id)
     {
       case PROP_NAME:
         name = g_value_get_string (value);

         if (!name)
           break;

         if (icon->names)
           g_strfreev (icon->names);

         icon->names = g_new (char *, 2);
         icon->names[0] = g_strdup (name);
         icon->names[1] = NULL;
         break;

       case PROP_NAMES:
         names = g_value_dup_boxed (value);

         if (!names)
           break;

         if (icon->names)
           g_strfreev (icon->names);

         icon->names = names;
         break;

       case PROP_USE_DEFAULT_FALLBACKS:
         icon->use_default_fallbacks = g_value_get_boolean (value);
         break;

       default:
         G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
     }
 }

 static void
 g_themed_icon_constructed (GObject *object)
 {
   GThemedIcon *themed = G_THEMED_ICON (object);

   g_return_if_fail (themed->names != NULL && themed->names[0] != NULL);

   if (themed->use_default_fallbacks)
     {
       int i = 0, dashes = 0;
       const char *p;
       char *dashp;
       char *last;
       gboolean is_symbolic;
       char *name;
       char **names;

       is_symbolic = g_str_has_suffix (themed->names[0], "-symbolic");
       if (is_symbolic)
         name = g_strndup (themed->names[0], strlen (themed->names[0]) - 9);
       else
         name = g_strdup (themed->names[0]);

       p = name;
       while (*p)
         {
           if (*p == '-')
             dashes++;
           p++;
         }

       last = name;

       g_strfreev (themed->names);

       names = g_new (char *, dashes + 1 + 1);
       names[i++] = last;

       while ((dashp = strrchr (last, '-')) != NULL)
         names[i++] = last = g_strndup (last, dashp - last);

       names[i++] = NULL;

       if (is_symbolic)
         {
           themed->names = g_new (char *, 2 * dashes + 3);
           for (i = 0; names[i] != NULL; i++)
             {
               themed->names[i] = g_strconcat (names[i], "-symbolic", NULL);
               themed->names[dashes + 1 + i] = names[i];
             }

           themed->names[dashes + 1 + i] = NULL;
           g_free (names);
         }
       else
         {
           themed->names = names;
         }
     }
 }

 static void
 g_themed_icon_finalize (GObject *object)
 {
   GThemedIcon *themed;

   themed = G_THEMED_ICON (object);

   g_strfreev (themed->names);

   G_OBJECT_CLASS (g_themed_icon_parent_class)->finalize (object);
 }

 static void
 g_themed_icon_class_init (GThemedIconClass *klass)
 {
   GObjectClass *gobject_class = G_OBJECT_CLASS (klass);

   gobject_class->finalize = g_themed_icon_finalize;
   gobject_class->constructed = g_themed_icon_constructed;
   gobject_class->set_property = g_themed_icon_set_property;
   gobject_class->get_property = g_themed_icon_get_property;

   /**
    * GThemedIcon:name:
    *
    * The icon name.
    */
   g_object_class_install_property (gobject_class, PROP_NAME,
                                    g_param_spec_string ("name",
                                                         P_("name"),
                                                         P_("The name of the icon"),
                                                         NULL,
                                                         G_PARAM_CONSTRUCT_ONLY | G_PARAM_WRITABLE | G_PARAM_STATIC_NAME | G_PARAM_STATIC_BLURB | G_PARAM_STATIC_NICK));

   /**
    * GThemedIcon:names:
    *
    * A %NULL-terminated array of icon names.
    */
   g_object_class_install_property (gobject_class, PROP_NAMES,
                                    g_param_spec_boxed ("names",
                                                        P_("names"),
                                                        P_("An array containing the icon names"),
                                                        G_TYPE_STRV,
                                                        G_PARAM_CONSTRUCT_ONLY | G_PARAM_READWRITE | G_PARAM_STATIC_NAME | G_PARAM_STATIC_BLURB | G_PARAM_STATIC_NICK));

   /**
    * GThemedIcon:use-default-fallbacks:
    *
    * Whether to use the default fallbacks found by shortening the icon name
    * at '-' characters. If the "names" array has more than one element,
    * ignores any past the first.
    *
    * For example, if the icon name was "gnome-dev-cdrom-audio", the array
    * would become
    * |[<!-- language="C" -->
    * {
    *   "gnome-dev-cdrom-audio",
    *   "gnome-dev-cdrom",
    *   "gnome-dev",
    *   "gnome",
    *   NULL
    * };
    * ]|
    */
   g_object_class_install_property (gobject_class, PROP_USE_DEFAULT_FALLBACKS,
                                    g_param_spec_boolean ("use-default-fallbacks",
                                                          P_("use default fallbacks"),
                                                          P_("Whether to use default fallbacks found by shortening the name at “-” characters. Ignores names after the first if multiple names are given."),
                                                          FALSE,
                                                          G_PARAM_CONSTRUCT_ONLY | G_PARAM_READWRITE | G_PARAM_STATIC_NAME | G_PARAM_STATIC_BLURB | G_PARAM_STATIC_NICK));
 }

 static void
 g_themed_icon_init (GThemedIcon *themed)
 {
   themed->names = NULL;
 }

 /**
  * g_themed_icon_new:
  * @iconname: a string containing an icon name.
  *
  * Creates a new themed icon for @iconname.
  *
  * Returns: (transfer full) (type GThemedIcon): a new #GThemedIcon.
  **/
 GIcon *
 g_themed_icon_new (const char *iconname)
 {
   g_return_val_if_fail (iconname != NULL, NULL);

   return G_ICON (g_object_new (G_TYPE_THEMED_ICON, "name", iconname, NULL));
 }

 /**
  * g_themed_icon_new_from_names:
  * @iconnames: (array length=len): an array of strings containing icon names.
  * @len: the length of the @iconnames array, or -1 if @iconnames is
  *     %NULL-terminated
  *
  * Creates a new themed icon for @iconnames.
  *
  * Returns: (transfer full) (type GThemedIcon): a new #GThemedIcon
  **/
 GIcon *
 g_themed_icon_new_from_names (char **iconnames,
                               int    len)
 {
   GIcon *icon;

   g_return_val_if_fail (iconnames != NULL, NULL);

   if (len >= 0)
     {
       char **names;
       int i;

       names = g_new (char *, len + 1);

       for (i = 0; i < len; i++)
         names[i] = iconnames[i];

       names[i] = NULL;

       icon = G_ICON (g_object_new (G_TYPE_THEMED_ICON, "names", names, NULL));

       g_free (names);
     }
   else
     icon = G_ICON (g_object_new (G_TYPE_THEMED_ICON, "names", iconnames, NULL));

   return icon;
 }

 /**
  * g_themed_icon_new_with_default_fallbacks:
  * @iconname: a string containing an icon name
  *
  * Creates a new themed icon for @iconname, and all the names
  * that can be created by shortening @iconname at '-' characters.
  *
  * In the following example, @icon1 and @icon2 are equivalent:
  * |[<!-- language="C" -->
  * const char *names[] = {
  *   "gnome-dev-cdrom-audio",
  *   "gnome-dev-cdrom",
  *   "gnome-dev",
  *   "gnome"
  * };
  *
  * icon1 = g_themed_icon_new_from_names (names, 4);
  * icon2 = g_themed_icon_new_with_default_fallbacks ("gnome-dev-cdrom-audio");
  * ]|
  *
  * Returns: (transfer full) (type GThemedIcon): a new #GThemedIcon.
  */
 GIcon *
 g_themed_icon_new_with_default_fallbacks (const char *iconname)
 {
   g_return_val_if_fail (iconname != NULL, NULL);

   return G_ICON (g_object_new (G_TYPE_THEMED_ICON, "name", iconname, "use-default-fallbacks", TRUE, NULL));
 }


 /**
  * g_themed_icon_get_names:
  * @icon: a #GThemedIcon.
  *
  * Gets the names of icons from within @icon.
  *
  * Returns: (transfer none): a list of icon names.
  */
 const char * const *
 g_themed_icon_get_names (GThemedIcon *icon)
 {
   g_return_val_if_fail (G_IS_THEMED_ICON (icon), NULL);
   return (const char * const *)icon->names;
 }

 /**
  * g_themed_icon_append_name:
  * @icon: a #GThemedIcon
  * @iconname: name of icon to append to list of icons from within @icon.
  *
  * Append a name to the list of icons from within @icon.
  *
  * Note that doing so invalidates the hash computed by prior calls
  * to g_icon_hash().
  */
 void
 g_themed_icon_append_name (GThemedIcon *icon,
                            const char  *iconname)
 {
   guint num_names;

   g_return_if_fail (G_IS_THEMED_ICON (icon));
   g_return_if_fail (iconname != NULL);

   num_names = g_strv_length (icon->names);
   icon->names = g_realloc (icon->names, sizeof (char*) * (num_names + 2));
   icon->names[num_names] = g_strdup (iconname);
   icon->names[num_names + 1] = NULL;

   g_object_notify (G_OBJECT (icon), "names");
 }

 /**
  * g_themed_icon_prepend_name:
  * @icon: a #GThemedIcon
  * @iconname: name of icon to prepend to list of icons from within @icon.
  *
  * Prepend a name to the list of icons from within @icon.
  *
  * Note that doing so invalidates the hash computed by prior calls
  * to g_icon_hash().
  *
  * Since: 2.18
  */
 void
 g_themed_icon_prepend_name (GThemedIcon *icon,
                             const char  *iconname)
 {
   guint num_names;
   gchar **names;
   gint i;

   g_return_if_fail (G_IS_THEMED_ICON (icon));
   g_return_if_fail (iconname != NULL);

   num_names = g_strv_length (icon->names);
   names = g_new (char*, num_names + 2);
   for (i = 0; icon->names[i]; i++)
     names[i + 1] = icon->names[i];
   names[0] = g_strdup (iconname);
   names[num_names + 1] = NULL;

   g_free (icon->names);
   icon->names = names;

   g_object_notify (G_OBJECT (icon), "names");
 }

 static guint
 g_themed_icon_hash (GIcon *icon)
 {
   GThemedIcon *themed = G_THEMED_ICON (icon);
   guint hash;
   int i;

   hash = 0;

   for (i = 0; themed->names[i] != NULL; i++)
     hash ^= g_str_hash (themed->names[i]);

   return hash;
 }

 static gboolean
 g_themed_icon_equal (GIcon *icon1,
                      GIcon *icon2)
 {
   GThemedIcon *themed1 = G_THEMED_ICON (icon1);
   GThemedIcon *themed2 = G_THEMED_ICON (icon2);
   int i;

   for (i = 0; themed1->names[i] != NULL && themed2->names[i] != NULL; i++)
     {
       if (!g_str_equal (themed1->names[i], themed2->names[i]))
 	return FALSE;
     }

   return themed1->names[i] == NULL && themed2->names[i] == NULL;
 }


 static gboolean
 g_themed_icon_to_tokens (GIcon *icon,
 			 GPtrArray *tokens,
                          gint  *out_version)
 {
   GThemedIcon *themed_icon = G_THEMED_ICON (icon);
   int n;

   g_return_val_if_fail (out_version != NULL, FALSE);

   *out_version = 0;

   for (n = 0; themed_icon->names[n] != NULL; n++)
     g_ptr_array_add (tokens,
 		     g_strdup (themed_icon->names[n]));

   return TRUE;
 }

 static GIcon *
 g_themed_icon_from_tokens (gchar  **tokens,
                            gint     num_tokens,
                            gint     version,
                            GError **error)
 {
   GIcon *icon;
   gchar **names;
   int n;

   icon = NULL;

   if (version != 0)
     {
       g_set_error (error,
                    G_IO_ERROR,
                    G_IO_ERROR_INVALID_ARGUMENT,
                    _("Can’t handle version %d of GThemedIcon encoding"),
                    version);
       goto out;
     }

   names = g_new0 (gchar *, num_tokens + 1);
   for (n = 0; n < num_tokens; n++)
     names[n] = tokens[n];
   names[n] = NULL;

   icon = g_themed_icon_new_from_names (names, num_tokens);
   g_free (names);

  out:
   return icon;
 }

 static GVariant *
 g_themed_icon_serialize (GIcon *icon)
 {
   GThemedIcon *themed_icon = G_THEMED_ICON (icon);

   return g_variant_new ("(sv)", "themed", g_variant_new ("^as", themed_icon->names));
 }

 static void
 g_themed_icon_icon_iface_init (GIconIface *iface)
 {
   iface->hash = g_themed_icon_hash;
   iface->equal = g_themed_icon_equal;
   iface->to_tokens = g_themed_icon_to_tokens;
   iface->from_tokens = g_themed_icon_from_tokens;
   iface->serialize = g_themed_icon_serialize;
 }
	/* 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 2.1 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, see <http://www.gnu.org/licenses/>.
	*
	* Author: Alexander Larsson <alexl@redhat.com>
	*/

	#include "config.h"

	#include <string.h>

	#include "gthemedicon.h"
	#include "gicon.h"
	#include "gioerror.h"
	#include "glibintl.h"


	/**
	* SECTION:gthemedicon
	* @short_description: Icon theming support
	* @include: gio/gio.h
	* @see_also: #GIcon, #GLoadableIcon
	*
	* #GThemedIcon is an implementation of #GIcon that supports icon themes.
	* #GThemedIcon contains a list of all of the icons present in an icon
	* theme, so that icons can be looked up quickly. #GThemedIcon does
	* not provide actual pixmaps for icons, just the icon names.
	* Ideally something like gtk_icon_theme_choose_icon() should be used to
	* resolve the list of names so that fallback icons work nicely with
	* themes that inherit other themes.
	**/

	static void g_themed_icon_icon_iface_init (GIconIface *iface);

	struct _GThemedIcon
	{
	GObject parent_instance;

	char **names;
	gboolean use_default_fallbacks;
	};

	struct _GThemedIconClass
	{
	GObjectClass parent_class;
	};

	enum
	{
	PROP_0,
	PROP_NAME,
	PROP_NAMES,
	PROP_USE_DEFAULT_FALLBACKS
	};

	G_DEFINE_TYPE_WITH_CODE (GThemedIcon, g_themed_icon, G_TYPE_OBJECT,
	G_IMPLEMENT_INTERFACE (G_TYPE_ICON,
	g_themed_icon_icon_iface_init))

	static void
	g_themed_icon_get_property (GObject *object,
	guint prop_id,
	GValue *value,
	GParamSpec *pspec)
	{
	GThemedIcon *icon = G_THEMED_ICON (object);

	switch (prop_id)
	{
	case PROP_NAMES:
	g_value_set_boxed (value, icon->names);
	break;

	case PROP_USE_DEFAULT_FALLBACKS:
	g_value_set_boolean (value, icon->use_default_fallbacks);
	break;

	default:
	G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
	}
	}

	static void
	g_themed_icon_set_property (GObject *object,
	guint prop_id,
	const GValue *value,
	GParamSpec *pspec)
	{
	GThemedIcon *icon = G_THEMED_ICON (object);
	gchar **names;
	const gchar *name;

	switch (prop_id)
	{
	case PROP_NAME:
	name = g_value_get_string (value);

	if (!name)
	break;

	if (icon->names)
	g_strfreev (icon->names);

	icon->names = g_new (char *, 2);
	icon->names[0] = g_strdup (name);
	icon->names[1] = NULL;
	break;

	case PROP_NAMES:
	names = g_value_dup_boxed (value);

	if (!names)
	break;

	if (icon->names)
	g_strfreev (icon->names);

	icon->names = names;
	break;

	case PROP_USE_DEFAULT_FALLBACKS:
	icon->use_default_fallbacks = g_value_get_boolean (value);
	break;

	default:
	G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
	}
	}

	static void
	g_themed_icon_constructed (GObject *object)
	{
	GThemedIcon *themed = G_THEMED_ICON (object);

	g_return_if_fail (themed->names != NULL && themed->names[0] != NULL);

	if (themed->use_default_fallbacks)
	{
	int i = 0, dashes = 0;
	const char *p;
	char *dashp;
	char *last;
	gboolean is_symbolic;
	char *name;
	char **names;

	is_symbolic = g_str_has_suffix (themed->names[0], "-symbolic");
	if (is_symbolic)
	name = g_strndup (themed->names[0], strlen (themed->names[0]) - 9);
	else
	name = g_strdup (themed->names[0]);

	p = name;
	while (*p)
	{
	if (*p == '-')
	dashes++;
	p++;
	}

	last = name;

	g_strfreev (themed->names);

	names = g_new (char *, dashes + 1 + 1);
	names[i++] = last;

	while ((dashp = strrchr (last, '-')) != NULL)
	names[i++] = last = g_strndup (last, dashp - last);

	names[i++] = NULL;

	if (is_symbolic)
	{
	themed->names = g_new (char , 2 dashes + 3);
	for (i = 0; names[i] != NULL; i++)
	{
	themed->names[i] = g_strconcat (names[i], "-symbolic", NULL);
	themed->names[dashes + 1 + i] = names[i];
	}

	themed->names[dashes + 1 + i] = NULL;
	g_free (names);
	}
	else
	{
	themed->names = names;
	}
	}
	}

	static void
	g_themed_icon_finalize (GObject *object)
	{
	GThemedIcon *themed;

	themed = G_THEMED_ICON (object);

	g_strfreev (themed->names);

	G_OBJECT_CLASS (g_themed_icon_parent_class)->finalize (object);
	}

	static void
	g_themed_icon_class_init (GThemedIconClass *klass)
	{
	GObjectClass *gobject_class = G_OBJECT_CLASS (klass);

	gobject_class->finalize = g_themed_icon_finalize;
	gobject_class->constructed = g_themed_icon_constructed;
	gobject_class->set_property = g_themed_icon_set_property;
	gobject_class->get_property = g_themed_icon_get_property;

	/**
	* GThemedIcon:name:
	*
	* The icon name.
	*/
	g_object_class_install_property (gobject_class, PROP_NAME,
	g_param_spec_string ("name",
	P_("name"),
	P_("The name of the icon"),
	NULL,
	G_PARAM_CONSTRUCT_ONLY \| G_PARAM_WRITABLE \| G_PARAM_STATIC_NAME \| G_PARAM_STATIC_BLURB \| G_PARAM_STATIC_NICK));

	/**
	* GThemedIcon:names:
	*
	* A %NULL-terminated array of icon names.
	*/
	g_object_class_install_property (gobject_class, PROP_NAMES,
	g_param_spec_boxed ("names",
	P_("names"),
	P_("An array containing the icon names"),
	G_TYPE_STRV,
	G_PARAM_CONSTRUCT_ONLY \| G_PARAM_READWRITE \| G_PARAM_STATIC_NAME \| G_PARAM_STATIC_BLURB \| G_PARAM_STATIC_NICK));

	/**
	* GThemedIcon:use-default-fallbacks:
	*
	* Whether to use the default fallbacks found by shortening the icon name
	* at '-' characters. If the "names" array has more than one element,
	* ignores any past the first.
	*
	* For example, if the icon name was "gnome-dev-cdrom-audio", the array
	* would become
	* \|[<!-- language="C" -->
	* {
	* "gnome-dev-cdrom-audio",
	* "gnome-dev-cdrom",
	* "gnome-dev",
	* "gnome",
	* NULL
	* };
	* ]\|
	*/
	g_object_class_install_property (gobject_class, PROP_USE_DEFAULT_FALLBACKS,
	g_param_spec_boolean ("use-default-fallbacks",
	P_("use default fallbacks"),
	P_("Whether to use default fallbacks found by shortening the name at “-” characters. Ignores names after the first if multiple names are given."),
	FALSE,
	G_PARAM_CONSTRUCT_ONLY \| G_PARAM_READWRITE \| G_PARAM_STATIC_NAME \| G_PARAM_STATIC_BLURB \| G_PARAM_STATIC_NICK));
	}

	static void
	g_themed_icon_init (GThemedIcon *themed)
	{
	themed->names = NULL;
	}

	/**
	* g_themed_icon_new:
	* @iconname: a string containing an icon name.
	*
	* Creates a new themed icon for @iconname.
	*
	* Returns: (transfer full) (type GThemedIcon): a new #GThemedIcon.
	**/
	GIcon *
	g_themed_icon_new (const char *iconname)
	{
	g_return_val_if_fail (iconname != NULL, NULL);

	return G_ICON (g_object_new (G_TYPE_THEMED_ICON, "name", iconname, NULL));
	}

	/**
	* g_themed_icon_new_from_names:
	* @iconnames: (array length=len): an array of strings containing icon names.
	* @len: the length of the @iconnames array, or -1 if @iconnames is
	* %NULL-terminated
	*
	* Creates a new themed icon for @iconnames.
	*
	* Returns: (transfer full) (type GThemedIcon): a new #GThemedIcon
	**/
	GIcon *
	g_themed_icon_new_from_names (char **iconnames,
	int len)
	{
	GIcon *icon;

	g_return_val_if_fail (iconnames != NULL, NULL);

	if (len >= 0)
	{
	char **names;
	int i;

	names = g_new (char *, len + 1);

	for (i = 0; i < len; i++)
	names[i] = iconnames[i];

	names[i] = NULL;

	icon = G_ICON (g_object_new (G_TYPE_THEMED_ICON, "names", names, NULL));

	g_free (names);
	}
	else
	icon = G_ICON (g_object_new (G_TYPE_THEMED_ICON, "names", iconnames, NULL));

	return icon;
	}

	/**
	* g_themed_icon_new_with_default_fallbacks:
	* @iconname: a string containing an icon name
	*
	* Creates a new themed icon for @iconname, and all the names
	* that can be created by shortening @iconname at '-' characters.
	*
	* In the following example, @icon1 and @icon2 are equivalent:
	* \|[<!-- language="C" -->
	* const char *names[] = {
	* "gnome-dev-cdrom-audio",
	* "gnome-dev-cdrom",
	* "gnome-dev",
	* "gnome"
	* };
	*
	* icon1 = g_themed_icon_new_from_names (names, 4);
	* icon2 = g_themed_icon_new_with_default_fallbacks ("gnome-dev-cdrom-audio");
	* ]\|
	*
	* Returns: (transfer full) (type GThemedIcon): a new #GThemedIcon.
	*/
	GIcon *
	g_themed_icon_new_with_default_fallbacks (const char *iconname)
	{
	g_return_val_if_fail (iconname != NULL, NULL);

	return G_ICON (g_object_new (G_TYPE_THEMED_ICON, "name", iconname, "use-default-fallbacks", TRUE, NULL));
	}


	/**
	* g_themed_icon_get_names:
	* @icon: a #GThemedIcon.
	*
	* Gets the names of icons from within @icon.
	*
	* Returns: (transfer none): a list of icon names.
	*/
	const char * const *
	g_themed_icon_get_names (GThemedIcon *icon)
	{
	g_return_val_if_fail (G_IS_THEMED_ICON (icon), NULL);
	return (const char * const *)icon->names;
	}

	/**
	* g_themed_icon_append_name:
	* @icon: a #GThemedIcon
	* @iconname: name of icon to append to list of icons from within @icon.
	*
	* Append a name to the list of icons from within @icon.
	*
	* Note that doing so invalidates the hash computed by prior calls
	* to g_icon_hash().
	*/
	void
	g_themed_icon_append_name (GThemedIcon *icon,
	const char *iconname)
	{
	guint num_names;

	g_return_if_fail (G_IS_THEMED_ICON (icon));
	g_return_if_fail (iconname != NULL);

	num_names = g_strv_length (icon->names);
	icon->names = g_realloc (icon->names, sizeof (char) (num_names + 2));
	icon->names[num_names] = g_strdup (iconname);
	icon->names[num_names + 1] = NULL;

	g_object_notify (G_OBJECT (icon), "names");
	}

	/**
	* g_themed_icon_prepend_name:
	* @icon: a #GThemedIcon
	* @iconname: name of icon to prepend to list of icons from within @icon.
	*
	* Prepend a name to the list of icons from within @icon.
	*
	* Note that doing so invalidates the hash computed by prior calls
	* to g_icon_hash().
	*
	* Since: 2.18
	*/
	void
	g_themed_icon_prepend_name (GThemedIcon *icon,
	const char *iconname)
	{
	guint num_names;
	gchar **names;
	gint i;

	g_return_if_fail (G_IS_THEMED_ICON (icon));
	g_return_if_fail (iconname != NULL);

	num_names = g_strv_length (icon->names);
	names = g_new (char*, num_names + 2);
	for (i = 0; icon->names[i]; i++)
	names[i + 1] = icon->names[i];
	names[0] = g_strdup (iconname);
	names[num_names + 1] = NULL;

	g_free (icon->names);
	icon->names = names;

	g_object_notify (G_OBJECT (icon), "names");
	}

	static guint
	g_themed_icon_hash (GIcon *icon)
	{
	GThemedIcon *themed = G_THEMED_ICON (icon);
	guint hash;
	int i;

	hash = 0;

	for (i = 0; themed->names[i] != NULL; i++)
	hash ^= g_str_hash (themed->names[i]);

	return hash;
	}

	static gboolean
	g_themed_icon_equal (GIcon *icon1,
	GIcon *icon2)
	{
	GThemedIcon *themed1 = G_THEMED_ICON (icon1);
	GThemedIcon *themed2 = G_THEMED_ICON (icon2);
	int i;

	for (i = 0; themed1->names[i] != NULL && themed2->names[i] != NULL; i++)
	{
	if (!g_str_equal (themed1->names[i], themed2->names[i]))
	return FALSE;
	}

	return themed1->names[i] == NULL && themed2->names[i] == NULL;
	}


	static gboolean
	g_themed_icon_to_tokens (GIcon *icon,
	GPtrArray *tokens,
	gint *out_version)
	{
	GThemedIcon *themed_icon = G_THEMED_ICON (icon);
	int n;

	g_return_val_if_fail (out_version != NULL, FALSE);

	*out_version = 0;

	for (n = 0; themed_icon->names[n] != NULL; n++)
	g_ptr_array_add (tokens,
	g_strdup (themed_icon->names[n]));

	return TRUE;
	}

	static GIcon *
	g_themed_icon_from_tokens (gchar **tokens,
	gint num_tokens,
	gint version,
	GError **error)
	{
	GIcon *icon;
	gchar **names;
	int n;

	icon = NULL;

	if (version != 0)
	{
	g_set_error (error,
	G_IO_ERROR,
	G_IO_ERROR_INVALID_ARGUMENT,
	_("Can’t handle version %d of GThemedIcon encoding"),
	version);
	goto out;
	}

	names = g_new0 (gchar *, num_tokens + 1);
	for (n = 0; n < num_tokens; n++)
	names[n] = tokens[n];
	names[n] = NULL;

	icon = g_themed_icon_new_from_names (names, num_tokens);
	g_free (names);

	out:
	return icon;
	}

	static GVariant *
	g_themed_icon_serialize (GIcon *icon)
	{
	GThemedIcon *themed_icon = G_THEMED_ICON (icon);

	return g_variant_new ("(sv)", "themed", g_variant_new ("^as", themed_icon->names));
	}

	static void
	g_themed_icon_icon_iface_init (GIconIface *iface)
	{
	iface->hash = g_themed_icon_hash;
	iface->equal = g_themed_icon_equal;
	iface->to_tokens = g_themed_icon_to_tokens;
	iface->from_tokens = g_themed_icon_from_tokens;
	iface->serialize = g_themed_icon_serialize;
	}