/* -*- mode: C; c-file-style: "gnu"; indent-tabs-mode: nil; -*- */

/* 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: Matthias Clasen <mclasen@redhat.com>

 *         Clemens N. Buss <cebuzz@gmail.com>

 */

#include <config.h>

#include <string.h>

#include "gemblemedicon.h"

#include "glibintl.h"

#include "gioerror.h"

/**

 * SECTION:gemblemedicon

 * @short_description: Icon with emblems

 * @include: gio/gio.h

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

 *

 * #GEmblemedIcon is an implementation of #GIcon that supports

 * adding an emblem to an icon. Adding multiple emblems to an

 * icon is ensured via g_emblemed_icon_add_emblem(). 

 *

 * Note that #GEmblemedIcon allows no control over the position

 * of the emblems. See also #GEmblem for more information.

 **/

enum {

  PROP_GICON = 1,

  NUM_PROPERTIES

};

struct _GEmblemedIconPrivate {

  GIcon *icon;

  GList *emblems;

};

static GParamSpec *properties[NUM_PROPERTIES] = { NULL, };

static void g_emblemed_icon_icon_iface_init (GIconIface *iface);

G_DEFINE_TYPE_WITH_CODE (GEmblemedIcon, g_emblemed_icon, G_TYPE_OBJECT,

                         G_ADD_PRIVATE (GEmblemedIcon)

                         G_IMPLEMENT_INTERFACE (G_TYPE_ICON,

                         g_emblemed_icon_icon_iface_init))

static void

g_emblemed_icon_finalize (GObject *object)

{

  GEmblemedIcon *emblemed;

  emblemed = G_EMBLEMED_ICON (object);

  g_clear_object (&emblemed->priv->icon);

  g_list_free_full (emblemed->priv->emblems, g_object_unref);

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

}

static void

g_emblemed_icon_set_property (GObject  *object,

                              guint property_id,

                              const GValue *value,

                              GParamSpec *pspec)

{

  GEmblemedIcon *self = G_EMBLEMED_ICON (object);

  switch (property_id)

    {

    case PROP_GICON:

      self->priv->icon = g_value_dup_object (value);

      break;

    default:

      G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);

      break;

    }

}

static void

g_emblemed_icon_get_property (GObject  *object,

                              guint property_id,

                              GValue *value,

                              GParamSpec *pspec)

{

  GEmblemedIcon *self = G_EMBLEMED_ICON (object);

  switch (property_id)

    {

    case PROP_GICON:

      g_value_set_object (value, self->priv->icon);

      break;

    default:

      G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);

      break;

    }

}

static void

g_emblemed_icon_class_init (GEmblemedIconClass *klass)

{

  GObjectClass *gobject_class = G_OBJECT_CLASS (klass);

  gobject_class->finalize = g_emblemed_icon_finalize;

  gobject_class->set_property = g_emblemed_icon_set_property;

  gobject_class->get_property = g_emblemed_icon_get_property;

  properties[PROP_GICON] =

    g_param_spec_object ("gicon",

                         P_("The base GIcon"),

                         P_("The GIcon to attach emblems to"),

                         G_TYPE_ICON,

                         G_PARAM_READWRITE | G_PARAM_CONSTRUCT_ONLY | G_PARAM_STATIC_STRINGS);

  g_object_class_install_properties (gobject_class, NUM_PROPERTIES, properties);

}

static void

g_emblemed_icon_init (GEmblemedIcon *emblemed)

{

  emblemed->priv = g_emblemed_icon_get_instance_private (emblemed);

}

/**

 * g_emblemed_icon_new:

 * @icon: a #GIcon

 * @emblem: (nullable): a #GEmblem, or %NULL

 *

 * Creates a new emblemed icon for @icon with the emblem @emblem.

 *

 * Returns: (transfer full) (type GEmblemedIcon): a new #GIcon

 *

 * Since: 2.18

 **/

GIcon *

g_emblemed_icon_new (GIcon   *icon,

                     GEmblem *emblem)

{

  GEmblemedIcon *emblemed;

  g_return_val_if_fail (G_IS_ICON (icon), NULL);

  g_return_val_if_fail (!G_IS_EMBLEM (icon), NULL);

  emblemed = G_EMBLEMED_ICON (g_object_new (G_TYPE_EMBLEMED_ICON,

                                            "gicon", icon,

                                            NULL));

  if (emblem != NULL)

    g_emblemed_icon_add_emblem (emblemed, emblem);

  return G_ICON (emblemed);

}

/**

 * g_emblemed_icon_get_icon:

 * @emblemed: a #GEmblemedIcon

 *

 * Gets the main icon for @emblemed.

 *

 * Returns: (transfer none): a #GIcon that is owned by @emblemed

 *

 * Since: 2.18

 **/

GIcon *

g_emblemed_icon_get_icon (GEmblemedIcon *emblemed)

{

  g_return_val_if_fail (G_IS_EMBLEMED_ICON (emblemed), NULL);

  return emblemed->priv->icon;

}

/**

 * g_emblemed_icon_get_emblems:

 * @emblemed: a #GEmblemedIcon

 *

 * Gets the list of emblems for the @icon.

 *

 * Returns: (element-type Gio.Emblem) (transfer none): a #GList of

 *     #GEmblems that is owned by @emblemed

 *

 * Since: 2.18

 **/

GList *

g_emblemed_icon_get_emblems (GEmblemedIcon *emblemed)

{

  g_return_val_if_fail (G_IS_EMBLEMED_ICON (emblemed), NULL);

  return emblemed->priv->emblems;

}

/**

 * g_emblemed_icon_clear_emblems:

 * @emblemed: a #GEmblemedIcon

 *

 * Removes all the emblems from @icon.

 *

 * Since: 2.28

 **/

void

g_emblemed_icon_clear_emblems (GEmblemedIcon *emblemed)

{

  g_return_if_fail (G_IS_EMBLEMED_ICON (emblemed));

  if (emblemed->priv->emblems == NULL)

    return;

  g_list_free_full (emblemed->priv->emblems, g_object_unref);

  emblemed->priv->emblems = NULL;

}

static gint

g_emblem_comp (GEmblem *a,

               GEmblem *b)

{

  guint hash_a = g_icon_hash (G_ICON (a));

  guint hash_b = g_icon_hash (G_ICON (b));

  if(hash_a < hash_b)

    return -1;

  if(hash_a == hash_b)

    return 0;

  return 1;

}

/**

 * g_emblemed_icon_add_emblem:

 * @emblemed: a #GEmblemedIcon

 * @emblem: a #GEmblem

 *

 * Adds @emblem to the #GList of #GEmblems.

 *

 * Since: 2.18

 **/

void 

g_emblemed_icon_add_emblem (GEmblemedIcon *emblemed,

                            GEmblem       *emblem)

{

  g_return_if_fail (G_IS_EMBLEMED_ICON (emblemed));

  g_return_if_fail (G_IS_EMBLEM (emblem));

  g_object_ref (emblem);

  emblemed->priv->emblems = g_list_insert_sorted (emblemed->priv->emblems, emblem,

                                                  (GCompareFunc) g_emblem_comp);

}

static guint

g_emblemed_icon_hash (GIcon *icon)

{

  GEmblemedIcon *emblemed = G_EMBLEMED_ICON (icon);

  GList *list;

  guint hash = g_icon_hash (emblemed->priv->icon);

  for (list = emblemed->priv->emblems; list != NULL; list = list->next)

    hash ^= g_icon_hash (G_ICON (list->data));

  return hash;

}

static gboolean

g_emblemed_icon_equal (GIcon *icon1,

                       GIcon *icon2)

{

  GEmblemedIcon *emblemed1 = G_EMBLEMED_ICON (icon1);

  GEmblemedIcon *emblemed2 = G_EMBLEMED_ICON (icon2);

  GList *list1, *list2;

  if (!g_icon_equal (emblemed1->priv->icon, emblemed2->priv->icon))

    return FALSE;

  list1 = emblemed1->priv->emblems;

  list2 = emblemed2->priv->emblems;

  while (list1 && list2)

  {

    if (!g_icon_equal (G_ICON (list1->data), G_ICON (list2->data)))

        return FALSE;

    list1 = list1->next;

    list2 = list2->next;

  }

  return list1 == NULL && list2 == NULL;

}

static gboolean

g_emblemed_icon_to_tokens (GIcon *icon,

                           GPtrArray *tokens,

                           gint  *out_version)

{

  GEmblemedIcon *emblemed_icon = G_EMBLEMED_ICON (icon);

  GList *l;

  char *s;

  /* GEmblemedIcons are encoded as

   *

   *   <encoded_icon> [<encoded_emblem_icon>]*

   */

  g_return_val_if_fail (out_version != NULL, FALSE);

  *out_version = 0;

  s = g_icon_to_string (emblemed_icon->priv->icon);

  if (s == NULL)

    return FALSE;

  g_ptr_array_add (tokens, s);

  for (l = emblemed_icon->priv->emblems; l != NULL; l = l->next)

    {

      GIcon *emblem_icon = G_ICON (l->data);

      s = g_icon_to_string (emblem_icon);

      if (s == NULL)

        return FALSE;

      g_ptr_array_add (tokens, s);

    }

  return TRUE;

}

static GIcon *

g_emblemed_icon_from_tokens (gchar  **tokens,

                             gint     num_tokens,

                             gint     version,

                             GError **error)

{

  GEmblemedIcon *emblemed_icon;

  int n;

  emblemed_icon = NULL;

  if (version != 0)

    {

      g_set_error (error,

                   G_IO_ERROR,

                   G_IO_ERROR_INVALID_ARGUMENT,

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

                   version);

      goto fail;

    }

  if (num_tokens < 1)

    {

      g_set_error (error,

                   G_IO_ERROR,

                   G_IO_ERROR_INVALID_ARGUMENT,

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

                   num_tokens);

      goto fail;

    }

  emblemed_icon = g_object_new (G_TYPE_EMBLEMED_ICON, NULL);

  emblemed_icon->priv->icon = g_icon_new_for_string (tokens[0], error);

  if (emblemed_icon->priv->icon == NULL)

    goto fail;

  for (n = 1; n < num_tokens; n++)

    {

      GIcon *emblem;

      emblem = g_icon_new_for_string (tokens[n], error);

      if (emblem == NULL)

        goto fail;

      if (!G_IS_EMBLEM (emblem))

        {

          g_set_error_literal (error,

                               G_IO_ERROR,

                               G_IO_ERROR_INVALID_ARGUMENT,

                               _("Expected a GEmblem for GEmblemedIcon"));

          g_object_unref (emblem);

          goto fail;

        }

      emblemed_icon->priv->emblems = g_list_append (emblemed_icon->priv->emblems, emblem);

    }

  return G_ICON (emblemed_icon);

 fail:

  if (emblemed_icon != NULL)

    g_object_unref (emblemed_icon);

  return NULL;

}

static GVariant *

g_emblemed_icon_serialize (GIcon *icon)

{

  GEmblemedIcon *emblemed_icon = G_EMBLEMED_ICON (icon);

  GVariantBuilder builder;

  GVariant *icon_data;

  GList *node;

  icon_data = g_icon_serialize (emblemed_icon->priv->icon);

  if (!icon_data)

    return NULL;

  g_variant_builder_init (&builder, G_VARIANT_TYPE ("(va(va{sv}))"));

  g_variant_builder_add (&builder, "v", icon_data);

  g_variant_unref (icon_data);

  g_variant_builder_open (&builder, G_VARIANT_TYPE ("a(va{sv})"));

  for (node = emblemed_icon->priv->emblems; node != NULL; node = node->next)

    {

      icon_data = g_icon_serialize (node->data);

      if (icon_data)

        {

          /* We know how emblems serialise, so do a tweak here to

           * reduce some of the variant wrapping and redundant storage

           * of 'emblem' over and again...

           */

          if (g_variant_is_of_type (icon_data, G_VARIANT_TYPE ("(sv)")))

            {

              const gchar *name;

              GVariant *content;

              g_variant_get (icon_data, "(&sv)", &name, &content);

              if (g_str_equal (name, "emblem") && g_variant_is_of_type (content, G_VARIANT_TYPE ("(va{sv})")))

                g_variant_builder_add (&builder, "@(va{sv})", content);

              g_variant_unref (content);

            }

          g_variant_unref (icon_data);

        }

    }

  g_variant_builder_close (&builder);

  return g_variant_new ("(sv)", "emblemed", g_variant_builder_end (&builder));

}

static void

g_emblemed_icon_icon_iface_init (GIconIface *iface)

{

  iface->hash = g_emblemed_icon_hash;

  iface->equal = g_emblemed_icon_equal;

  iface->to_tokens = g_emblemed_icon_to_tokens;

  iface->from_tokens = g_emblemed_icon_from_tokens;

  iface->serialize = g_emblemed_icon_serialize;

}