/* GIO - GLib Input, Output and Streaming Library

 *

 * Copyright (C) 2008 Clemens N. Buss <cebuzz@gmail.com>

 *

 * 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/>.

 */

#include <config.h>

#include "gicon.h"

#include "gemblem.h"

#include "glibintl.h"

#include "gioenums.h"

#include "gioenumtypes.h"

#include "gioerror.h"

#include <stdlib.h>

#include <string.h>

/**

 * SECTION:gemblem

 * @short_description: An object for emblems

 * @include: gio/gio.h

 * @see_also: #GIcon, #GEmblemedIcon, #GLoadableIcon, #GThemedIcon

 *

 * #GEmblem is an implementation of #GIcon that supports

 * having an emblem, which is an icon with additional properties.

 * It can than be added to a #GEmblemedIcon.

 *

 * Currently, only metainformation about the emblem's origin is

 * supported. More may be added in the future.

 */

static void g_emblem_iface_init (GIconIface *iface);

struct _GEmblem

{

  GObject parent_instance;

  GIcon *icon;

  GEmblemOrigin origin;

};

struct _GEmblemClass

{

  GObjectClass parent_class;

};

enum

{

  PROP_0_GEMBLEM,

  PROP_ICON,

  PROP_ORIGIN

};

G_DEFINE_TYPE_WITH_CODE (GEmblem, g_emblem, G_TYPE_OBJECT,

                         G_IMPLEMENT_INTERFACE (G_TYPE_ICON, g_emblem_iface_init))

static void

g_emblem_get_property (GObject    *object,

                       guint       prop_id,

                       GValue     *value,

                       GParamSpec *pspec)

{

  GEmblem *emblem = G_EMBLEM (object);

  switch (prop_id)

    {

      case PROP_ICON:

        g_value_set_object (value, emblem->icon);

	break;

      case PROP_ORIGIN:

        g_value_set_enum (value, emblem->origin);

        break;

      default:

        G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);

        break;

  }

}

static void

g_emblem_set_property (GObject      *object,

                       guint         prop_id,

                       const GValue *value,

                       GParamSpec   *pspec)

{

  GEmblem *emblem = G_EMBLEM (object);

  switch (prop_id)

    {

      case PROP_ICON:

        emblem->icon = g_value_dup_object (value);

        break;

      case PROP_ORIGIN:

        emblem->origin = g_value_get_enum (value);

        break;

      default:

        G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);

        break;

    }

}

static void

g_emblem_finalize (GObject *object)

{

  GEmblem *emblem = G_EMBLEM (object);

  if (emblem->icon)

    g_object_unref (emblem->icon);

  (*G_OBJECT_CLASS (g_emblem_parent_class)->finalize) (object);

}

static void

g_emblem_class_init (GEmblemClass *klass)

{

  GObjectClass *gobject_class = G_OBJECT_CLASS (klass);

  gobject_class->finalize = g_emblem_finalize;

  gobject_class->set_property = g_emblem_set_property;

  gobject_class->get_property = g_emblem_get_property;

  g_object_class_install_property (gobject_class,

                                   PROP_ORIGIN,

                                   g_param_spec_enum ("origin",

                                                      P_("GEmblem’s origin"),

                                                      P_("Tells which origin the emblem is derived from"),

                                                      G_TYPE_EMBLEM_ORIGIN,

                                                      G_EMBLEM_ORIGIN_UNKNOWN,

                                                      G_PARAM_CONSTRUCT_ONLY | G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));

  g_object_class_install_property (gobject_class,

                                   PROP_ICON,

                                   g_param_spec_object ("icon",

                                                      P_("The icon of the emblem"),

                                                      P_("The actual icon of the emblem"),

                                                      G_TYPE_OBJECT,

                                                      G_PARAM_CONSTRUCT_ONLY | G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));

}

static void

g_emblem_init (GEmblem *emblem)

{

}

/**

 * g_emblem_new:

 * @icon: a GIcon containing the icon.

 *

 * Creates a new emblem for @icon.

 *

 * Returns: a new #GEmblem.

 *

 * Since: 2.18

 */

GEmblem *

g_emblem_new (GIcon *icon)

{

  GEmblem* emblem;

  g_return_val_if_fail (icon != NULL, NULL);

  g_return_val_if_fail (G_IS_ICON (icon), NULL);

  g_return_val_if_fail (!G_IS_EMBLEM (icon), NULL);

  emblem = g_object_new (G_TYPE_EMBLEM, NULL);

  emblem->icon = g_object_ref (icon);

  emblem->origin = G_EMBLEM_ORIGIN_UNKNOWN;

  return emblem;

}

/**

 * g_emblem_new_with_origin:

 * @icon: a GIcon containing the icon.

 * @origin: a GEmblemOrigin enum defining the emblem's origin

 *

 * Creates a new emblem for @icon.

 *

 * Returns: a new #GEmblem.

 *

 * Since: 2.18

 */

GEmblem *

g_emblem_new_with_origin (GIcon         *icon,

                          GEmblemOrigin  origin)

{

  GEmblem* emblem;

  g_return_val_if_fail (icon != NULL, NULL);

  g_return_val_if_fail (G_IS_ICON (icon), NULL);

  g_return_val_if_fail (!G_IS_EMBLEM (icon), NULL);

  emblem = g_object_new (G_TYPE_EMBLEM, NULL);

  emblem->icon = g_object_ref (icon);

  emblem->origin = origin;

  return emblem;

}

/**

 * g_emblem_get_icon:

 * @emblem: a #GEmblem from which the icon should be extracted.

 *

 * Gives back the icon from @emblem.

 *

 * Returns: (transfer none): a #GIcon. The returned object belongs to

 *          the emblem and should not be modified or freed.

 *

 * Since: 2.18

 */

GIcon *

g_emblem_get_icon (GEmblem *emblem)

{

  g_return_val_if_fail (G_IS_EMBLEM (emblem), NULL);

  return emblem->icon;

}

/**

 * g_emblem_get_origin:

 * @emblem: a #GEmblem

 *

 * Gets the origin of the emblem.

 *

 * Returns: (transfer none): the origin of the emblem

 *

 * Since: 2.18

 */

GEmblemOrigin

g_emblem_get_origin (GEmblem *emblem)

{

  g_return_val_if_fail (G_IS_EMBLEM (emblem), G_EMBLEM_ORIGIN_UNKNOWN);

  return emblem->origin;

}

static guint

g_emblem_hash (GIcon *icon)

{

  GEmblem *emblem = G_EMBLEM (icon);

  guint hash;

  hash  = g_icon_hash (g_emblem_get_icon (emblem));

  hash ^= emblem->origin;

  return hash;

}

static gboolean

g_emblem_equal (GIcon *icon1,

                GIcon *icon2)

{

  GEmblem *emblem1 = G_EMBLEM (icon1);

  GEmblem *emblem2 = G_EMBLEM (icon2);

  return emblem1->origin == emblem2->origin &&

         g_icon_equal (emblem1->icon, emblem2->icon);

}

static gboolean

g_emblem_to_tokens (GIcon *icon,

		    GPtrArray *tokens,

		    gint  *out_version)

{

  GEmblem *emblem = G_EMBLEM (icon);

  char *s;

  /* GEmblem are encoded as

   *

   * <origin> <icon>

   */

  g_return_val_if_fail (out_version != NULL, FALSE);

  *out_version = 0;

  s = g_icon_to_string (emblem->icon);

  if (s == NULL)

    return FALSE;

  g_ptr_array_add (tokens, s);

  s = g_strdup_printf ("%d", emblem->origin);

  g_ptr_array_add (tokens, s);

  return TRUE;

}

static GIcon *

g_emblem_from_tokens (gchar  **tokens,

		      gint     num_tokens,

		      gint     version,

		      GError **error)

{

  GEmblem *emblem;

  GIcon *icon;

  GEmblemOrigin origin;

  emblem = NULL;

  if (version != 0)

    {

      g_set_error (error,

                   G_IO_ERROR,

                   G_IO_ERROR_INVALID_ARGUMENT,

                   _("Can’t handle version %d of GEmblem encoding"),

                   version);

      return NULL;

    }

  if (num_tokens != 2)

    {

      g_set_error (error,

                   G_IO_ERROR,

                   G_IO_ERROR_INVALID_ARGUMENT,

                   _("Malformed number of tokens (%d) in GEmblem encoding"),

                   num_tokens);

      return NULL;

    }

  icon = g_icon_new_for_string (tokens[0], error);

  if (icon == NULL)

    return NULL;

  origin = atoi (tokens[1]);

  emblem = g_emblem_new_with_origin (icon, origin);

  g_object_unref (icon);

  return G_ICON (emblem);

}

static GVariant *

g_emblem_serialize (GIcon *icon)

{

  GEmblem *emblem = G_EMBLEM (icon);

  GVariant *icon_data;

  GEnumValue *origin;

  GVariant *result;

  icon_data = g_icon_serialize (emblem->icon);

  if (!icon_data)

    return NULL;

  origin = g_enum_get_value (g_type_class_peek (G_TYPE_EMBLEM_ORIGIN), emblem->origin);

  result = g_variant_new_parsed ("('emblem', <(%v, {'origin': <%s>})>)",

                                 icon_data, origin ? origin->value_nick : "unknown");

  g_variant_unref (icon_data);

  return result;

}

static void

g_emblem_iface_init (GIconIface *iface)

{

  iface->hash  = g_emblem_hash;

  iface->equal = g_emblem_equal;

  iface->to_tokens = g_emblem_to_tokens;

  iface->from_tokens = g_emblem_from_tokens;

  iface->serialize = g_emblem_serialize;

}