gio/gnextstepsettingsbackend.c

   1 /*
   2  * Copyright © 2011 William Hua
   3  *
   4  * This library is free software; you can redistribute it and/or
   5  * modify it under the terms of the GNU Lesser General Public
   6  * License as published by the Free Software Foundation; either
   7  * version 2 of the licence, or (at your option) any later version.
   8  *
   9  * This library is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12  * Lesser General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU Lesser General Public
  15  * License along with this library; if not, see <http://www.gnu.org/licenses/>.
  16  *
  17  * Author: William Hua <william@attente.ca>
  18  */
  19
  20 #include "config.h"
  21
  22 #include "gsettingsbackendinternal.h"
  23 #include "gsimplepermission.h"
  24 #include "giomodule.h"
  25
  26 #import <Foundation/Foundation.h>
  27
  28 GType g_nextstep_settings_backend_get_type (void);
  29
  30 #define G_NEXTSTEP_SETTINGS_BACKEND(obj) (G_TYPE_CHECK_INSTANCE_CAST ((obj), g_nextstep_settings_backend_get_type (), GNextstepSettingsBackend))
  31
  32 typedef struct _GNextstepSettingsBackend GNextstepSettingsBackend;
  33 typedef GSettingsBackendClass            GNextstepSettingsBackendClass;
  34
  35 struct _GNextstepSettingsBackend
  36 {
  37   GSettingsBackend  parent_instance;
  38
  39   /*< private >*/
  40   NSUserDefaults   *user_defaults;
  41   GMutex            mutex;
  42 };
  43
  44 G_DEFINE_TYPE_WITH_CODE (GNextstepSettingsBackend,
  45                          g_nextstep_settings_backend,
  46                          G_TYPE_SETTINGS_BACKEND,
  47                          g_io_extension_point_implement (G_SETTINGS_BACKEND_EXTENSION_POINT_NAME,
  48                                                          g_define_type_id, "nextstep", 90));
  49
  50 static void          g_nextstep_settings_backend_finalize       (GObject            *backend);
  51
  52 static GVariant *    g_nextstep_settings_backend_read           (GSettingsBackend   *backend,
  53                                                                  const gchar        *key,
  54                                                                  const GVariantType *expected_type,
  55                                                                  gboolean            default_value);
  56
  57 static gboolean      g_nextstep_settings_backend_get_writable   (GSettingsBackend   *backend,
  58                                                                  const gchar        *key);
  59
  60 static gboolean      g_nextstep_settings_backend_write          (GSettingsBackend   *backend,
  61                                                                  const gchar        *key,
  62                                                                  GVariant           *value,
  63                                                                  gpointer            origin_tag);
  64
  65 static gboolean      g_nextstep_settings_backend_write_tree     (GSettingsBackend   *backend,
  66                                                                  GTree              *tree,
  67                                                                  gpointer            origin_tag);
  68
  69 static void          g_nextstep_settings_backend_reset          (GSettingsBackend   *backend,
  70                                                                  const gchar        *key,
  71                                                                  gpointer            origin_tag);
  72
  73 static void          g_nextstep_settings_backend_subscribe      (GSettingsBackend   *backend,
  74                                                                  const gchar        *name);
  75
  76 static void          g_nextstep_settings_backend_unsubscribe    (GSettingsBackend   *backend,
  77                                                                  const gchar        *name);
  78
  79 static void          g_nextstep_settings_backend_sync           (GSettingsBackend   *backend);
  80
  81 static GPermission * g_nextstep_settings_backend_get_permission (GSettingsBackend   *backend,
  82                                                                  const gchar        *path);
  83
  84 static gboolean      g_nextstep_settings_backend_write_pair     (gpointer            name,
  85                                                                  gpointer            value,
  86                                                                  gpointer            data);
  87
  88 static GVariant *    g_nextstep_settings_backend_get_g_variant  (id                  object,
  89                                                                  const GVariantType *type);
  90
  91 static id            g_nextstep_settings_backend_get_ns_object  (GVariant           *variant);
  92
  93 static void
  94 g_nextstep_settings_backend_class_init (GNextstepSettingsBackendClass *class)
  95 {
  96   G_OBJECT_CLASS (class)->finalize = g_nextstep_settings_backend_finalize;
  97   class->read = g_nextstep_settings_backend_read;
  98   class->get_writable = g_nextstep_settings_backend_get_writable;
  99   class->write = g_nextstep_settings_backend_write;
 100   class->write_tree = g_nextstep_settings_backend_write_tree;
 101   class->reset = g_nextstep_settings_backend_reset;
 102   class->subscribe = g_nextstep_settings_backend_subscribe;
 103   class->unsubscribe = g_nextstep_settings_backend_unsubscribe;
 104   class->sync = g_nextstep_settings_backend_sync;
 105   class->get_permission = g_nextstep_settings_backend_get_permission;
 106 }
 107
 108 static void
 109 g_nextstep_settings_backend_init (GNextstepSettingsBackend *self)
 110 {
 111   NSAutoreleasePool *pool;
 112
 113   pool = [[NSAutoreleasePool alloc] init];
 114
 115   self->user_defaults = [[NSUserDefaults standardUserDefaults] retain];
 116
 117   g_mutex_init (&self->mutex);
 118
 119   [pool drain];
 120 }
 121
 122 static void
 123 g_nextstep_settings_backend_finalize (GObject *self)
 124 {
 125   GNextstepSettingsBackend *backend = G_NEXTSTEP_SETTINGS_BACKEND (self);
 126   NSAutoreleasePool *pool;
 127
 128   pool = [[NSAutoreleasePool alloc] init];
 129
 130   g_mutex_clear (&backend->mutex);
 131
 132   [backend->user_defaults release];
 133
 134   [pool drain];
 135
 136   G_OBJECT_CLASS (g_nextstep_settings_backend_parent_class)->finalize (self);
 137 }
 138
 139 static GVariant *
 140 g_nextstep_settings_backend_read (GSettingsBackend   *backend,
 141                                   const gchar        *key,
 142                                   const GVariantType *expected_type,
 143                                   gboolean            default_value)
 144 {
 145   GNextstepSettingsBackend *self = G_NEXTSTEP_SETTINGS_BACKEND (backend);
 146   NSAutoreleasePool *pool;
 147   NSString *name;
 148   id value;
 149   GVariant *variant;
 150
 151   if (default_value)
 152     return NULL;
 153
 154   pool = [[NSAutoreleasePool alloc] init];
 155   name = [NSString stringWithUTF8String:key];
 156
 157   g_mutex_lock (&self->mutex);
 158   value = [self->user_defaults objectForKey:name];
 159   g_mutex_unlock (&self->mutex);
 160
 161   variant = g_nextstep_settings_backend_get_g_variant (value, expected_type);
 162
 163   [pool drain];
 164
 165   return variant;
 166 }
 167
 168 static gboolean
 169 g_nextstep_settings_backend_get_writable (GSettingsBackend *backend,
 170                                           const gchar      *key)
 171 {
 172   return TRUE;
 173 }
 174
 175 static gboolean
 176 g_nextstep_settings_backend_write (GSettingsBackend *backend,
 177                                    const gchar      *key,
 178                                    GVariant         *value,
 179                                    gpointer          origin_tag)
 180 {
 181   GNextstepSettingsBackend *self = G_NEXTSTEP_SETTINGS_BACKEND (backend);
 182   NSAutoreleasePool *pool;
 183
 184   pool = [[NSAutoreleasePool alloc] init];
 185
 186   g_mutex_lock (&self->mutex);
 187   g_nextstep_settings_backend_write_pair ((gpointer) key, value, self);
 188   g_mutex_unlock (&self->mutex);
 189
 190   g_settings_backend_changed (backend, key, origin_tag);
 191
 192   [pool drain];
 193
 194   return TRUE;
 195 }
 196
 197 static gboolean
 198 g_nextstep_settings_backend_write_tree (GSettingsBackend *backend,
 199                                         GTree            *tree,
 200                                         gpointer          origin_tag)
 201 {
 202   GNextstepSettingsBackend *self = G_NEXTSTEP_SETTINGS_BACKEND (backend);
 203   NSAutoreleasePool *pool;
 204
 205   pool = [[NSAutoreleasePool alloc] init];
 206
 207   g_mutex_lock (&self->mutex);
 208   g_tree_foreach (tree, g_nextstep_settings_backend_write_pair, self);
 209   g_mutex_unlock (&self->mutex);
 210   g_settings_backend_changed_tree (backend, tree, origin_tag);
 211
 212   [pool drain];
 213
 214   return TRUE;
 215 }
 216
 217 static void
 218 g_nextstep_settings_backend_reset (GSettingsBackend *backend,
 219                                    const gchar      *key,
 220                                    gpointer          origin_tag)
 221 {
 222   GNextstepSettingsBackend *self = G_NEXTSTEP_SETTINGS_BACKEND (backend);
 223   NSAutoreleasePool *pool;
 224   NSString *name;
 225
 226   pool = [[NSAutoreleasePool alloc] init];
 227   name = [NSString stringWithUTF8String:key];
 228
 229   g_mutex_lock (&self->mutex);
 230   [self->user_defaults removeObjectForKey:name];
 231   g_mutex_unlock (&self->mutex);
 232
 233   g_settings_backend_changed (backend, key, origin_tag);
 234
 235   [pool drain];
 236 }
 237
 238 static void
 239 g_nextstep_settings_backend_subscribe (GSettingsBackend *backend,
 240                                        const gchar      *name)
 241 {
 242 }
 243
 244 static void
 245 g_nextstep_settings_backend_unsubscribe (GSettingsBackend *backend,
 246                                          const gchar      *name)
 247 {
 248 }
 249
 250 static void
 251 g_nextstep_settings_backend_sync (GSettingsBackend *backend)
 252 {
 253   GNextstepSettingsBackend *self = G_NEXTSTEP_SETTINGS_BACKEND (backend);
 254   NSAutoreleasePool *pool;
 255
 256   pool = [[NSAutoreleasePool alloc] init];
 257
 258   g_mutex_lock (&self->mutex);
 259   [self->user_defaults synchronize];
 260   g_mutex_unlock (&self->mutex);
 261
 262   [pool drain];
 263 }
 264
 265 static GPermission *
 266 g_nextstep_settings_backend_get_permission (GSettingsBackend *backend,
 267                                             const gchar      *path)
 268 {
 269   return g_simple_permission_new (TRUE);
 270 }
 271
 272 static gboolean
 273 g_nextstep_settings_backend_write_pair (gpointer name,
 274                                         gpointer value,
 275                                         gpointer data)
 276 {
 277   GNextstepSettingsBackend *backend = G_NEXTSTEP_SETTINGS_BACKEND (data);
 278   NSString *key;
 279   id object;
 280
 281   key = [NSString stringWithUTF8String:name];
 282   object = g_nextstep_settings_backend_get_ns_object (value);
 283
 284   [backend->user_defaults setObject:object forKey:key];
 285
 286   return FALSE;
 287 }
 288
 289 static GVariant *
 290 g_nextstep_settings_backend_get_g_variant (id                  object,
 291                                            const GVariantType *type)
 292 {
 293   if ([object isKindOfClass:[NSData class]])
 294     return g_variant_parse (type, [[[[NSString alloc] initWithData:object encoding:NSUTF8StringEncoding] autorelease] UTF8String], NULL, NULL, NULL);
 295   else if ([object isKindOfClass:[NSNumber class]])
 296     {
 297       if (g_variant_type_equal (type, G_VARIANT_TYPE_BOOLEAN))
 298         return g_variant_new_boolean ([object boolValue]);
 299       else if (g_variant_type_equal (type, G_VARIANT_TYPE_BYTE))
 300         return g_variant_new_byte ([object unsignedCharValue]);
 301       else if (g_variant_type_equal (type, G_VARIANT_TYPE_INT16))
 302         return g_variant_new_int16 ([object shortValue]);
 303       else if (g_variant_type_equal (type, G_VARIANT_TYPE_UINT16))
 304         return g_variant_new_uint16 ([object unsignedShortValue]);
 305       else if (g_variant_type_equal (type, G_VARIANT_TYPE_INT32))
 306         return g_variant_new_int32 ([object longValue]);
 307       else if (g_variant_type_equal (type, G_VARIANT_TYPE_UINT32))
 308         return g_variant_new_uint32 ([object unsignedLongValue]);
 309       else if (g_variant_type_equal (type, G_VARIANT_TYPE_INT64))
 310         return g_variant_new_int64 ([object longLongValue]);
 311       else if (g_variant_type_equal (type, G_VARIANT_TYPE_UINT64))
 312         return g_variant_new_uint64 ([object unsignedLongLongValue]);
 313       else if (g_variant_type_equal (type, G_VARIANT_TYPE_HANDLE))
 314         return g_variant_new_handle ([object longValue]);
 315       else if (g_variant_type_equal (type, G_VARIANT_TYPE_DOUBLE))
 316         return g_variant_new_double ([object doubleValue]);
 317     }
 318   else if ([object isKindOfClass:[NSString class]])
 319     {
 320       const char *string;
 321
 322       string = [object UTF8String];
 323
 324       if (g_variant_type_equal (type, G_VARIANT_TYPE_STRING))
 325         return g_variant_new_string (string);
 326       else if (g_variant_type_equal (type, G_VARIANT_TYPE_OBJECT_PATH))
 327         return g_variant_is_object_path (string) ?
 328                g_variant_new_object_path (string) : NULL;
 329       else if (g_variant_type_equal (type, G_VARIANT_TYPE_SIGNATURE))
 330         return g_variant_is_signature (string) ?
 331                g_variant_new_signature (string) : NULL;
 332     }
 333   else if ([object isKindOfClass:[NSDictionary class]])
 334     {
 335       if (g_variant_type_is_subtype_of (type, G_VARIANT_TYPE ("a{s*}")))
 336         {
 337           const GVariantType *value_type;
 338           GVariantBuilder builder;
 339           NSString *key;
 340
 341           value_type = g_variant_type_value (g_variant_type_element (type));
 342
 343           g_variant_builder_init (&builder, type);
 344
 345 #if MAC_OS_X_VERSION_MIN_REQUIRED >= 1050
 346           for(key in object)
 347 #else
 348           NSEnumerator *enumerator = [object objectEnumerator];
 349           while((key = [enumerator nextObject]))
 350 #endif
 351             {
 352               GVariant *name;
 353               id value;
 354               GVariant *variant;
 355               GVariant *entry;
 356
 357               name = g_variant_new_string ([key UTF8String]);
 358               value = [object objectForKey:key];
 359               variant = g_nextstep_settings_backend_get_g_variant (value, value_type);
 360
 361               if (variant == NULL)
 362                 {
 363                   g_variant_builder_clear (&builder);
 364
 365                   return NULL;
 366                 }
 367
 368               entry = g_variant_new_dict_entry (name, variant);
 369               g_variant_builder_add_value (&builder, entry);
 370             }
 371
 372           return g_variant_builder_end (&builder);
 373         }
 374     }
 375   else if ([object isKindOfClass:[NSArray class]])
 376     {
 377       if (g_variant_type_is_subtype_of (type, G_VARIANT_TYPE_ARRAY))
 378         {
 379           const GVariantType *value_type;
 380           GVariantBuilder builder;
 381           id value;
 382
 383           value_type = g_variant_type_element (type);
 384           g_variant_builder_init (&builder, type);
 385
 386 #if MAC_OS_X_VERSION_MIN_REQUIRED >= 1050
 387           for(value in object)
 388 #else
 389           NSEnumerator *enumerator = [object objectEnumerator];
 390           while((value = [enumerator nextObject]))
 391 #endif
 392             {
 393               GVariant *variant = g_nextstep_settings_backend_get_g_variant (value, value_type);
 394
 395               if (variant == NULL)
 396                 {
 397                   g_variant_builder_clear (&builder);
 398
 399                   return NULL;
 400                 }
 401
 402               g_variant_builder_add_value (&builder, variant);
 403             }
 404
 405           return g_variant_builder_end (&builder);
 406         }
 407     }
 408
 409   return NULL;
 410 }
 411
 412 static id
 413 g_nextstep_settings_backend_get_ns_object (GVariant *variant)
 414 {
 415   if (variant == NULL)
 416     return nil;
 417   else if (g_variant_is_of_type (variant, G_VARIANT_TYPE_BOOLEAN))
 418     return [NSNumber numberWithBool:g_variant_get_boolean (variant)];
 419   else if (g_variant_is_of_type (variant, G_VARIANT_TYPE_BYTE))
 420     return [NSNumber numberWithUnsignedChar:g_variant_get_byte (variant)];
 421   else if (g_variant_is_of_type (variant, G_VARIANT_TYPE_INT16))
 422     return [NSNumber numberWithShort:g_variant_get_int16 (variant)];
 423   else if (g_variant_is_of_type (variant, G_VARIANT_TYPE_UINT16))
 424     return [NSNumber numberWithUnsignedShort:g_variant_get_uint16 (variant)];
 425   else if (g_variant_is_of_type (variant, G_VARIANT_TYPE_INT32))
 426     return [NSNumber numberWithLong:g_variant_get_int32 (variant)];
 427   else if (g_variant_is_of_type (variant, G_VARIANT_TYPE_UINT32))
 428     return [NSNumber numberWithUnsignedLong:g_variant_get_uint32 (variant)];
 429   else if (g_variant_is_of_type (variant, G_VARIANT_TYPE_INT64))
 430     return [NSNumber numberWithLongLong:g_variant_get_int64 (variant)];
 431   else if (g_variant_is_of_type (variant, G_VARIANT_TYPE_UINT64))
 432     return [NSNumber numberWithUnsignedLongLong:g_variant_get_uint64 (variant)];
 433   else if (g_variant_is_of_type (variant, G_VARIANT_TYPE_HANDLE))
 434     return [NSNumber numberWithLong:g_variant_get_handle (variant)];
 435   else if (g_variant_is_of_type (variant, G_VARIANT_TYPE_DOUBLE))
 436     return [NSNumber numberWithDouble:g_variant_get_double (variant)];
 437   else if (g_variant_is_of_type (variant, G_VARIANT_TYPE_STRING))
 438     return [NSString stringWithUTF8String:g_variant_get_string (variant, NULL)];
 439   else if (g_variant_is_of_type (variant, G_VARIANT_TYPE_OBJECT_PATH))
 440     return [NSString stringWithUTF8String:g_variant_get_string (variant, NULL)];
 441   else if (g_variant_is_of_type (variant, G_VARIANT_TYPE_SIGNATURE))
 442     return [NSString stringWithUTF8String:g_variant_get_string (variant, NULL)];
 443   else if (g_variant_is_of_type (variant, G_VARIANT_TYPE ("a{s*}")))
 444     {
 445       NSMutableDictionary *dictionary;
 446       GVariantIter iter;
 447       GVariant *name;
 448       GVariant *value;
 449
 450       dictionary = [NSMutableDictionary dictionaryWithCapacity:g_variant_iter_init (&iter, variant)];
 451
 452       while (g_variant_iter_loop (&iter, "{s*}", &name, &value))
 453         {
 454           NSString *key;
 455           id object;
 456
 457           key = [NSString stringWithUTF8String:g_variant_get_string (name, NULL)];
 458           object = g_nextstep_settings_backend_get_ns_object (value);
 459
 460           [dictionary setObject:object forKey:key];
 461         }
 462
 463       return dictionary;
 464     }
 465   else if (g_variant_is_of_type (variant, G_VARIANT_TYPE_ARRAY))
 466     {
 467       NSMutableArray *array;
 468       GVariantIter iter;
 469       GVariant *value;
 470
 471       array = [NSMutableArray arrayWithCapacity:g_variant_iter_init (&iter, variant)];
 472
 473       while ((value = g_variant_iter_next_value (&iter)) != NULL)
 474         [array addObject:g_nextstep_settings_backend_get_ns_object (value)];
 475
 476       return array;
 477     }
 478   else
 479     return [[NSString stringWithUTF8String:g_variant_print (variant, TRUE)] dataUsingEncoding:NSUTF8StringEncoding];
 480 }