gio/gemblemedicon.c

   1 /* -*- mode: C; c-file-style: "gnu"; indent-tabs-mode: nil; -*- */
   2
   3 /* GIO - GLib Input, Output and Streaming Library
   4  *
   5  * Copyright (C) 2006-2007 Red Hat, Inc.
   6  *
   7  * This library is free software; you can redistribute it and/or
   8  * modify it under the terms of the GNU Lesser General Public
   9  * License as published by the Free Software Foundation; either
  10  * version 2 of the License, or (at your option) any later version.
  11  *
  12  * This library is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15  * Lesser General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU Lesser General
  18  * Public License along with this library; if not, write to the
  19  * Free Software Foundation, Inc., 59 Temple Place, Suite 330,
  20  * Boston, MA 02111-1307, USA.
  21  *
  22  * Author: Matthias Clasen <mclasen@redhat.com>
  23  *         Clemens N. Buss <cebuzz@gmail.com>
  24  */
  25
  26 #include <config.h>
  27
  28 #include <string.h>
  29
  30 #include "gemblemedicon.h"
  31 #include "glibintl.h"
  32 #include "gioerror.h"
  33
  34
  35 /**
  36  * SECTION:gemblemedicon
  37  * @short_description: Icon with emblems
  38  * @include: gio/gio.h
  39  * @see_also: #GIcon, #GLoadableIcon, #GThemedIcon, #GEmblem
  40  *
  41  * #GEmblemedIcon is an implementation of #GIcon that supports
  42  * adding an emblem to an icon. Adding multiple emblems to an
  43  * icon is ensured via g_emblemed_icon_add_emblem().
  44  *
  45  * Note that #GEmblemedIcon allows no control over the position
  46  * of the emblems. See also #GEmblem for more information.
  47  **/
  48
  49 enum {
  50   PROP_GICON = 1,
  51   NUM_PROPERTIES
  52 };
  53
  54 struct _GEmblemedIconPrivate {
  55   GIcon *icon;
  56   GList *emblems;
  57 };
  58
  59 static GParamSpec *properties[NUM_PROPERTIES] = { NULL, };
  60
  61 static void g_emblemed_icon_icon_iface_init (GIconIface *iface);
  62
  63 G_DEFINE_TYPE_WITH_CODE (GEmblemedIcon, g_emblemed_icon, G_TYPE_OBJECT,
  64                          G_ADD_PRIVATE (GEmblemedIcon)
  65                          G_IMPLEMENT_INTERFACE (G_TYPE_ICON,
  66                          g_emblemed_icon_icon_iface_init))
  67
  68
  69 static void
  70 g_emblemed_icon_finalize (GObject *object)
  71 {
  72   GEmblemedIcon *emblemed;
  73
  74   emblemed = G_EMBLEMED_ICON (object);
  75
  76   g_clear_object (&emblemed->priv->icon);
  77   g_list_free_full (emblemed->priv->emblems, g_object_unref);
  78
  79   (*G_OBJECT_CLASS (g_emblemed_icon_parent_class)->finalize) (object);
  80 }
  81
  82 static void
  83 g_emblemed_icon_set_property (GObject  *object,
  84                               guint property_id,
  85                               const GValue *value,
  86                               GParamSpec *pspec)
  87 {
  88   GEmblemedIcon *self = G_EMBLEMED_ICON (object);
  89
  90   switch (property_id)
  91     {
  92     case PROP_GICON:
  93       self->priv->icon = g_value_dup_object (value);
  94       break;
  95     default:
  96       G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
  97       break;
  98     }
  99 }
 100
 101 static void
 102 g_emblemed_icon_get_property (GObject  *object,
 103                               guint property_id,
 104                               GValue *value,
 105                               GParamSpec *pspec)
 106 {
 107   GEmblemedIcon *self = G_EMBLEMED_ICON (object);
 108
 109   switch (property_id)
 110     {
 111     case PROP_GICON:
 112       g_value_set_object (value, self->priv->icon);
 113       break;
 114     default:
 115       G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
 116       break;
 117     }
 118 }
 119
 120 static void
 121 g_emblemed_icon_class_init (GEmblemedIconClass *klass)
 122 {
 123   GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
 124
 125   gobject_class->finalize = g_emblemed_icon_finalize;
 126   gobject_class->set_property = g_emblemed_icon_set_property;
 127   gobject_class->get_property = g_emblemed_icon_get_property;
 128
 129   properties[PROP_GICON] =
 130     g_param_spec_object ("gicon",
 131                          P_("The base GIcon"),
 132                          P_("The GIcon to attach emblems to"),
 133                          G_TYPE_ICON,
 134                          G_PARAM_READWRITE | G_PARAM_CONSTRUCT_ONLY | G_PARAM_STATIC_STRINGS);
 135
 136   g_object_class_install_properties (gobject_class, NUM_PROPERTIES, properties);
 137 }
 138
 139 static void
 140 g_emblemed_icon_init (GEmblemedIcon *emblemed)
 141 {
 142   emblemed->priv = g_emblemed_icon_get_instance_private (emblemed);
 143 }
 144
 145 /**
 146  * g_emblemed_icon_new:
 147  * @icon: a #GIcon
 148  * @emblem: (allow-none): a #GEmblem, or %NULL
 149  *
 150  * Creates a new emblemed icon for @icon with the emblem @emblem.
 151  *
 152  * Returns: (transfer full) (type GEmblemedIcon): a new #GIcon
 153  *
 154  * Since: 2.18
 155  **/
 156 GIcon *
 157 g_emblemed_icon_new (GIcon   *icon,
 158                      GEmblem *emblem)
 159 {
 160   GEmblemedIcon *emblemed;
 161
 162   g_return_val_if_fail (G_IS_ICON (icon), NULL);
 163   g_return_val_if_fail (!G_IS_EMBLEM (icon), NULL);
 164
 165   emblemed = G_EMBLEMED_ICON (g_object_new (G_TYPE_EMBLEMED_ICON,
 166                                             "gicon", icon,
 167                                             NULL));
 168
 169   if (emblem != NULL)
 170     g_emblemed_icon_add_emblem (emblemed, emblem);
 171
 172   return G_ICON (emblemed);
 173 }
 174
 175
 176 /**
 177  * g_emblemed_icon_get_icon:
 178  * @emblemed: a #GEmblemedIcon
 179  *
 180  * Gets the main icon for @emblemed.
 181  *
 182  * Returns: (transfer none): a #GIcon that is owned by @emblemed
 183  *
 184  * Since: 2.18
 185  **/
 186 GIcon *
 187 g_emblemed_icon_get_icon (GEmblemedIcon *emblemed)
 188 {
 189   g_return_val_if_fail (G_IS_EMBLEMED_ICON (emblemed), NULL);
 190
 191   return emblemed->priv->icon;
 192 }
 193
 194 /**
 195  * g_emblemed_icon_get_emblems:
 196  * @emblemed: a #GEmblemedIcon
 197  *
 198  * Gets the list of emblems for the @icon.
 199  *
 200  * Returns: (element-type Gio.Emblem) (transfer none): a #GList of
 201  *          #GEmblem <!-- -->s that is owned by @emblemed
 202  *
 203  * Since: 2.18
 204  **/
 205
 206 GList *
 207 g_emblemed_icon_get_emblems (GEmblemedIcon *emblemed)
 208 {
 209   g_return_val_if_fail (G_IS_EMBLEMED_ICON (emblemed), NULL);
 210
 211   return emblemed->priv->emblems;
 212 }
 213
 214 /**
 215  * g_emblemed_icon_clear_emblems:
 216  * @emblemed: a #GEmblemedIcon
 217  *
 218  * Removes all the emblems from @icon.
 219  *
 220  * Since: 2.28
 221  **/
 222 void
 223 g_emblemed_icon_clear_emblems (GEmblemedIcon *emblemed)
 224 {
 225   g_return_if_fail (G_IS_EMBLEMED_ICON (emblemed));
 226
 227   if (emblemed->priv->emblems == NULL)
 228     return;
 229
 230   g_list_free_full (emblemed->priv->emblems, g_object_unref);
 231   emblemed->priv->emblems = NULL;
 232 }
 233
 234 static gint
 235 g_emblem_comp (GEmblem *a,
 236                GEmblem *b)
 237 {
 238   guint hash_a = g_icon_hash (G_ICON (a));
 239   guint hash_b = g_icon_hash (G_ICON (b));
 240
 241   if(hash_a < hash_b)
 242     return -1;
 243
 244   if(hash_a == hash_b)
 245     return 0;
 246
 247   return 1;
 248 }
 249
 250 /**
 251  * g_emblemed_icon_add_emblem:
 252  * @emblemed: a #GEmblemedIcon
 253  * @emblem: a #GEmblem
 254  *
 255  * Adds @emblem to the #GList of #GEmblem <!-- -->s.
 256  *
 257  * Since: 2.18
 258  **/
 259 void
 260 g_emblemed_icon_add_emblem (GEmblemedIcon *emblemed,
 261                             GEmblem       *emblem)
 262 {
 263   g_return_if_fail (G_IS_EMBLEMED_ICON (emblemed));
 264   g_return_if_fail (G_IS_EMBLEM (emblem));
 265
 266   g_object_ref (emblem);
 267   emblemed->priv->emblems = g_list_insert_sorted (emblemed->priv->emblems, emblem,
 268                                                   (GCompareFunc) g_emblem_comp);
 269 }
 270
 271 static guint
 272 g_emblemed_icon_hash (GIcon *icon)
 273 {
 274   GEmblemedIcon *emblemed = G_EMBLEMED_ICON (icon);
 275   GList *list;
 276   guint hash = g_icon_hash (emblemed->priv->icon);
 277
 278   for (list = emblemed->priv->emblems; list != NULL; list = list->next)
 279     hash ^= g_icon_hash (G_ICON (list->data));
 280
 281   return hash;
 282 }
 283
 284 static gboolean
 285 g_emblemed_icon_equal (GIcon *icon1,
 286                        GIcon *icon2)
 287 {
 288   GEmblemedIcon *emblemed1 = G_EMBLEMED_ICON (icon1);
 289   GEmblemedIcon *emblemed2 = G_EMBLEMED_ICON (icon2);
 290   GList *list1, *list2;
 291
 292   if (!g_icon_equal (emblemed1->priv->icon, emblemed2->priv->icon))
 293     return FALSE;
 294
 295   list1 = emblemed1->priv->emblems;
 296   list2 = emblemed2->priv->emblems;
 297
 298   while (list1 && list2)
 299   {
 300     if (!g_icon_equal (G_ICON (list1->data), G_ICON (list2->data)))
 301         return FALSE;
 302
 303     list1 = list1->next;
 304     list2 = list2->next;
 305   }
 306
 307   return list1 == NULL && list2 == NULL;
 308 }
 309
 310 static gboolean
 311 g_emblemed_icon_to_tokens (GIcon *icon,
 312                            GPtrArray *tokens,
 313                            gint  *out_version)
 314 {
 315   GEmblemedIcon *emblemed_icon = G_EMBLEMED_ICON (icon);
 316   GList *l;
 317   char *s;
 318
 319   /* GEmblemedIcons are encoded as
 320    *
 321    *   <encoded_icon> [<encoded_emblem_icon>]*
 322    */
 323
 324   g_return_val_if_fail (out_version != NULL, FALSE);
 325
 326   *out_version = 0;
 327
 328   s = g_icon_to_string (emblemed_icon->priv->icon);
 329   if (s == NULL)
 330     return FALSE;
 331
 332   g_ptr_array_add (tokens, s);
 333
 334   for (l = emblemed_icon->priv->emblems; l != NULL; l = l->next)
 335     {
 336       GIcon *emblem_icon = G_ICON (l->data);
 337
 338       s = g_icon_to_string (emblem_icon);
 339       if (s == NULL)
 340         return FALSE;
 341
 342       g_ptr_array_add (tokens, s);
 343     }
 344
 345   return TRUE;
 346 }
 347
 348 static GIcon *
 349 g_emblemed_icon_from_tokens (gchar  **tokens,
 350                              gint     num_tokens,
 351                              gint     version,
 352                              GError **error)
 353 {
 354   GEmblemedIcon *emblemed_icon;
 355   int n;
 356
 357   emblemed_icon = NULL;
 358
 359   if (version != 0)
 360     {
 361       g_set_error (error,
 362                    G_IO_ERROR,
 363                    G_IO_ERROR_INVALID_ARGUMENT,
 364                    _("Can't handle version %d of GEmblemedIcon encoding"),
 365                    version);
 366       goto fail;
 367     }
 368
 369   if (num_tokens < 1)
 370     {
 371       g_set_error (error,
 372                    G_IO_ERROR,
 373                    G_IO_ERROR_INVALID_ARGUMENT,
 374                    _("Malformed number of tokens (%d) in GEmblemedIcon encoding"),
 375                    num_tokens);
 376       goto fail;
 377     }
 378
 379   emblemed_icon = g_object_new (G_TYPE_EMBLEMED_ICON, NULL);
 380   emblemed_icon->priv->icon = g_icon_new_for_string (tokens[0], error);
 381   if (emblemed_icon->priv->icon == NULL)
 382     goto fail;
 383
 384   for (n = 1; n < num_tokens; n++)
 385     {
 386       GIcon *emblem;
 387
 388       emblem = g_icon_new_for_string (tokens[n], error);
 389       if (emblem == NULL)
 390         goto fail;
 391
 392       if (!G_IS_EMBLEM (emblem))
 393         {
 394           g_set_error_literal (error,
 395                                G_IO_ERROR,
 396                                G_IO_ERROR_INVALID_ARGUMENT,
 397                                _("Expected a GEmblem for GEmblemedIcon"));
 398           g_object_unref (emblem);
 399           goto fail;
 400         }
 401
 402       emblemed_icon->priv->emblems = g_list_append (emblemed_icon->priv->emblems, emblem);
 403     }
 404
 405   return G_ICON (emblemed_icon);
 406
 407  fail:
 408   if (emblemed_icon != NULL)
 409     g_object_unref (emblemed_icon);
 410   return NULL;
 411 }
 412
 413 static GVariant *
 414 g_emblemed_icon_serialize (GIcon *icon)
 415 {
 416   GEmblemedIcon *emblemed_icon = G_EMBLEMED_ICON (icon);
 417   GVariantBuilder builder;
 418   GVariant *icon_data;
 419   GList *node;
 420
 421   icon_data = g_icon_serialize (emblemed_icon->priv->icon);
 422   if (!icon_data)
 423     return NULL;
 424
 425   g_variant_builder_init (&builder, G_VARIANT_TYPE ("(va(va{sv}))"));
 426
 427   g_variant_builder_add (&builder, "v", icon_data);
 428   g_variant_unref (icon_data);
 429
 430   g_variant_builder_open (&builder, G_VARIANT_TYPE ("a(va{sv})"));
 431   for (node = emblemed_icon->priv->emblems; node != NULL; node = node->next)
 432     {
 433       icon_data = g_icon_serialize (node->data);
 434       if (icon_data)
 435         {
 436           /* We know how emblems serialise, so do a tweak here to
 437            * reduce some of the variant wrapping and redundant storage
 438            * of 'emblem' over and again...
 439            */
 440           if (g_variant_is_of_type (icon_data, G_VARIANT_TYPE ("(sv)")))
 441             {
 442               const gchar *name;
 443               GVariant *content;
 444
 445               g_variant_get (icon_data, "(&sv)", &name, &content);
 446
 447               if (g_str_equal (name, "emblem") && g_variant_is_of_type (content, G_VARIANT_TYPE ("(va{sv})")))
 448                 g_variant_builder_add (&builder, "@(va{sv})", content);
 449
 450               g_variant_unref (content);
 451             }
 452
 453           g_variant_unref (icon_data);
 454         }
 455     }
 456   g_variant_builder_close (&builder);
 457
 458   return g_variant_new ("(sv)", "emblemed", g_variant_builder_end (&builder));
 459 }
 460
 461 static void
 462 g_emblemed_icon_icon_iface_init (GIconIface *iface)
 463 {
 464   iface->hash = g_emblemed_icon_hash;
 465   iface->equal = g_emblemed_icon_equal;
 466   iface->to_tokens = g_emblemed_icon_to_tokens;
 467   iface->from_tokens = g_emblemed_icon_from_tokens;
 468   iface->serialize = g_emblemed_icon_serialize;
 469 }