gio/gsettings-mapping.c

   1 /*
   2  * Copyright © 2010 Novell, Inc.
   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, write to the
  16  * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  17  * Boston, MA 02111-1307, USA.
  18  *
  19  * Author: Vincent Untz <vuntz@gnome.org>
  20  */
  21
  22 #include "config.h"
  23
  24 #include "gsettings-mapping.h"
  25
  26 static GVariant *
  27 g_settings_set_mapping_int (const GValue       *value,
  28                             const GVariantType *expected_type)
  29 {
  30   GVariant *variant = NULL;
  31   gint64 l;
  32
  33   if (G_VALUE_HOLDS_INT (value))
  34     l = g_value_get_int (value);
  35   else if (G_VALUE_HOLDS_INT64 (value))
  36     l = g_value_get_int64 (value);
  37   else
  38     return NULL;
  39
  40   if (g_variant_type_equal (expected_type, G_VARIANT_TYPE_INT16))
  41     {
  42       if (G_MININT16 <= l && l <= G_MAXINT16)
  43         variant = g_variant_new_int16 ((gint16) l);
  44     }
  45   else if (g_variant_type_equal (expected_type, G_VARIANT_TYPE_UINT16))
  46     {
  47       if (0 <= l && l <= G_MAXUINT16)
  48         variant = g_variant_new_uint16 ((guint16) l);
  49     }
  50   else if (g_variant_type_equal (expected_type, G_VARIANT_TYPE_INT32))
  51     {
  52       if (G_MININT32 <= l && l <= G_MAXINT32)
  53         variant = g_variant_new_int32 ((gint) l);
  54     }
  55   else if (g_variant_type_equal (expected_type, G_VARIANT_TYPE_UINT32))
  56     {
  57       if (0 <= l && l <= G_MAXUINT32)
  58         variant = g_variant_new_uint32 ((guint) l);
  59     }
  60   else if (g_variant_type_equal (expected_type, G_VARIANT_TYPE_INT64))
  61     {
  62       if (G_MININT64 <= l && l <= G_MAXINT64)
  63         variant = g_variant_new_int64 ((gint64) l);
  64     }
  65   else if (g_variant_type_equal (expected_type, G_VARIANT_TYPE_UINT64))
  66     {
  67       if (0 <= l && l <= G_MAXUINT64)
  68         variant = g_variant_new_uint64 ((guint64) l);
  69     }
  70   else if (g_variant_type_equal (expected_type, G_VARIANT_TYPE_HANDLE))
  71     {
  72       if (0 <= l && l <= G_MAXUINT32)
  73         variant = g_variant_new_handle ((guint) l);
  74     }
  75   else if (g_variant_type_equal (expected_type, G_VARIANT_TYPE_DOUBLE))
  76     variant = g_variant_new_double ((gdouble) l);
  77
  78   return variant;
  79 }
  80
  81 static GVariant *
  82 g_settings_set_mapping_float (const GValue       *value,
  83                               const GVariantType *expected_type)
  84 {
  85   GVariant *variant = NULL;
  86   gdouble d;
  87   gint64 l;
  88
  89   if (G_VALUE_HOLDS_DOUBLE (value))
  90     d = g_value_get_double (value);
  91   else
  92     return NULL;
  93
  94   l = (gint64) d;
  95   if (g_variant_type_equal (expected_type, G_VARIANT_TYPE_INT16))
  96     {
  97       if (G_MININT16 <= l && l <= G_MAXINT16)
  98         variant = g_variant_new_int16 ((gint16) l);
  99     }
 100   else if (g_variant_type_equal (expected_type, G_VARIANT_TYPE_UINT16))
 101     {
 102       if (0 <= l && l <= G_MAXUINT16)
 103         variant = g_variant_new_uint16 ((guint16) l);
 104     }
 105   else if (g_variant_type_equal (expected_type, G_VARIANT_TYPE_INT32))
 106     {
 107       if (G_MININT32 <= l && l <= G_MAXINT32)
 108         variant = g_variant_new_int32 ((gint) l);
 109     }
 110   else if (g_variant_type_equal (expected_type, G_VARIANT_TYPE_UINT32))
 111     {
 112       if (0 <= l && l <= G_MAXUINT32)
 113         variant = g_variant_new_uint32 ((guint) l);
 114     }
 115   else if (g_variant_type_equal (expected_type, G_VARIANT_TYPE_INT64))
 116     {
 117       if (G_MININT64 <= l && l <= G_MAXINT64)
 118         variant = g_variant_new_int64 ((gint64) l);
 119     }
 120   else if (g_variant_type_equal (expected_type, G_VARIANT_TYPE_UINT64))
 121     {
 122       if (0 <= l && l <= G_MAXUINT64)
 123         variant = g_variant_new_uint64 ((guint64) l);
 124     }
 125   else if (g_variant_type_equal (expected_type, G_VARIANT_TYPE_HANDLE))
 126     {
 127       if (0 <= l && l <= G_MAXUINT32)
 128         variant = g_variant_new_handle ((guint) l);
 129     }
 130   else if (g_variant_type_equal (expected_type, G_VARIANT_TYPE_DOUBLE))
 131     variant = g_variant_new_double ((gdouble) d);
 132
 133   return variant;
 134 }
 135 static GVariant *
 136 g_settings_set_mapping_unsigned_int (const GValue       *value,
 137                                      const GVariantType *expected_type)
 138 {
 139   GVariant *variant = NULL;
 140   guint64 u;
 141
 142   if (G_VALUE_HOLDS_UINT (value))
 143     u = g_value_get_uint (value);
 144   else if (G_VALUE_HOLDS_UINT64 (value))
 145     u = g_value_get_uint64 (value);
 146   else
 147     return NULL;
 148
 149   if (g_variant_type_equal (expected_type, G_VARIANT_TYPE_INT16))
 150     {
 151       if (u <= G_MAXINT16)
 152         variant = g_variant_new_int16 ((gint16) u);
 153     }
 154   else if (g_variant_type_equal (expected_type, G_VARIANT_TYPE_UINT16))
 155     {
 156       if (u <= G_MAXUINT16)
 157         variant = g_variant_new_uint16 ((guint16) u);
 158     }
 159   else if (g_variant_type_equal (expected_type, G_VARIANT_TYPE_INT32))
 160     {
 161       if (u <= G_MAXINT32)
 162         variant = g_variant_new_int32 ((gint) u);
 163     }
 164   else if (g_variant_type_equal (expected_type, G_VARIANT_TYPE_UINT32))
 165     {
 166       if (u <= G_MAXUINT32)
 167         variant = g_variant_new_uint32 ((guint) u);
 168     }
 169   else if (g_variant_type_equal (expected_type, G_VARIANT_TYPE_INT64))
 170     {
 171       if (u <= G_MAXINT64)
 172         variant = g_variant_new_int64 ((gint64) u);
 173     }
 174   else if (g_variant_type_equal (expected_type, G_VARIANT_TYPE_UINT64))
 175     {
 176       if (u <= G_MAXUINT64)
 177         variant = g_variant_new_uint64 ((guint64) u);
 178     }
 179   else if (g_variant_type_equal (expected_type, G_VARIANT_TYPE_HANDLE))
 180     {
 181       if (u <= G_MAXUINT32)
 182         variant = g_variant_new_handle ((guint) u);
 183     }
 184   else if (g_variant_type_equal (expected_type, G_VARIANT_TYPE_DOUBLE))
 185     variant = g_variant_new_double ((gdouble) u);
 186
 187   return variant;
 188 }
 189
 190 static gboolean
 191 g_settings_get_mapping_int (GValue   *value,
 192                             GVariant *variant)
 193 {
 194   const GVariantType *type;
 195   gint64 l;
 196
 197   type = g_variant_get_type (variant);
 198
 199   if (g_variant_type_equal (type, G_VARIANT_TYPE_INT16))
 200     l = g_variant_get_int16 (variant);
 201   else if (g_variant_type_equal (type, G_VARIANT_TYPE_INT32))
 202     l = g_variant_get_int32 (variant);
 203   else if (g_variant_type_equal (type, G_VARIANT_TYPE_INT64))
 204     l = g_variant_get_int64 (variant);
 205   else
 206     return FALSE;
 207
 208   if (G_VALUE_HOLDS_INT (value))
 209     {
 210       g_value_set_int (value, l);
 211       return (G_MININT32 <= l && l <= G_MAXINT32);
 212     }
 213   else if (G_VALUE_HOLDS_UINT (value))
 214     {
 215       g_value_set_uint (value, l);
 216       return (0 <= l && l <= G_MAXUINT32);
 217     }
 218   else if (G_VALUE_HOLDS_INT64 (value))
 219     {
 220       g_value_set_int64 (value, l);
 221       return (G_MININT64 <= l && l <= G_MAXINT64);
 222     }
 223   else if (G_VALUE_HOLDS_UINT64 (value))
 224     {
 225       g_value_set_uint64 (value, l);
 226       return (0 <= l && l <= G_MAXUINT64);
 227     }
 228   else if (G_VALUE_HOLDS_DOUBLE (value))
 229     {
 230       g_value_set_double (value, l);
 231       return TRUE;
 232     }
 233
 234   return FALSE;
 235 }
 236
 237 static gboolean
 238 g_settings_get_mapping_float (GValue   *value,
 239                               GVariant *variant)
 240 {
 241   const GVariantType *type;
 242   gdouble d;
 243   gint64 l;
 244
 245   type = g_variant_get_type (variant);
 246
 247   if (g_variant_type_equal (type, G_VARIANT_TYPE_DOUBLE))
 248     d = g_variant_get_double (variant);
 249   else
 250     return FALSE;
 251
 252   l = (gint64)d;
 253   if (G_VALUE_HOLDS_INT (value))
 254     {
 255       g_value_set_int (value, l);
 256       return (G_MININT32 <= l && l <= G_MAXINT32);
 257     }
 258   else if (G_VALUE_HOLDS_UINT (value))
 259     {
 260       g_value_set_uint (value, l);
 261       return (0 <= l && l <= G_MAXUINT32);
 262     }
 263   else if (G_VALUE_HOLDS_INT64 (value))
 264     {
 265       g_value_set_int64 (value, l);
 266       return (G_MININT64 <= l && l <= G_MAXINT64);
 267     }
 268   else if (G_VALUE_HOLDS_UINT64 (value))
 269     {
 270       g_value_set_uint64 (value, l);
 271       return (0 <= l && l <= G_MAXUINT64);
 272     }
 273   else if (G_VALUE_HOLDS_DOUBLE (value))
 274     {
 275       g_value_set_double (value, d);
 276       return TRUE;
 277     }
 278
 279   return FALSE;
 280 }
 281 static gboolean
 282 g_settings_get_mapping_unsigned_int (GValue   *value,
 283                                      GVariant *variant)
 284 {
 285   const GVariantType *type;
 286   guint64 u;
 287
 288   type = g_variant_get_type (variant);
 289
 290   if (g_variant_type_equal (type, G_VARIANT_TYPE_UINT16))
 291     u = g_variant_get_uint16 (variant);
 292   else if (g_variant_type_equal (type, G_VARIANT_TYPE_UINT32))
 293     u = g_variant_get_uint32 (variant);
 294   else if (g_variant_type_equal (type, G_VARIANT_TYPE_UINT64))
 295     u = g_variant_get_uint64 (variant);
 296   else if (g_variant_type_equal (type, G_VARIANT_TYPE_HANDLE))
 297     u = g_variant_get_handle (variant);
 298   else
 299     return FALSE;
 300
 301   if (G_VALUE_HOLDS_INT (value))
 302     {
 303       g_value_set_int (value, u);
 304       return (u <= G_MAXINT32);
 305     }
 306   else if (G_VALUE_HOLDS_UINT (value))
 307     {
 308       g_value_set_uint (value, u);
 309       return (u <= G_MAXUINT32);
 310     }
 311   else if (G_VALUE_HOLDS_INT64 (value))
 312     {
 313       g_value_set_int64 (value, u);
 314       return (u <= G_MAXINT64);
 315     }
 316   else if (G_VALUE_HOLDS_UINT64 (value))
 317     {
 318       g_value_set_uint64 (value, u);
 319       return (u <= G_MAXUINT64);
 320     }
 321   else if (G_VALUE_HOLDS_DOUBLE (value))
 322     {
 323       g_value_set_double (value, u);
 324       return TRUE;
 325     }
 326
 327   return FALSE;
 328 }
 329
 330 GVariant *
 331 g_settings_set_mapping (const GValue       *value,
 332                         const GVariantType *expected_type,
 333                         gpointer            user_data)
 334 {
 335   gchar *type_string;
 336
 337   if (G_VALUE_HOLDS_BOOLEAN (value))
 338     {
 339       if (g_variant_type_equal (expected_type, G_VARIANT_TYPE_BOOLEAN))
 340         return g_variant_new_boolean (g_value_get_boolean (value));
 341     }
 342
 343   else if (G_VALUE_HOLDS_CHAR (value)  ||
 344            G_VALUE_HOLDS_UCHAR (value))
 345     {
 346       if (g_variant_type_equal (expected_type, G_VARIANT_TYPE_BYTE))
 347         {
 348           if (G_VALUE_HOLDS_CHAR (value))
 349             return g_variant_new_byte (g_value_get_schar (value));
 350           else
 351             return g_variant_new_byte (g_value_get_uchar (value));
 352         }
 353     }
 354
 355   else if (G_VALUE_HOLDS_INT (value)   ||
 356            G_VALUE_HOLDS_INT64 (value))
 357     return g_settings_set_mapping_int (value, expected_type);
 358
 359   else if (G_VALUE_HOLDS_DOUBLE (value))
 360     return g_settings_set_mapping_float (value, expected_type);
 361
 362   else if (G_VALUE_HOLDS_UINT (value)  ||
 363            G_VALUE_HOLDS_UINT64 (value))
 364     return g_settings_set_mapping_unsigned_int (value, expected_type);
 365
 366   else if (G_VALUE_HOLDS_STRING (value))
 367     {
 368       if (g_value_get_string (value) == NULL)
 369         return NULL;
 370       else if (g_variant_type_equal (expected_type, G_VARIANT_TYPE_STRING))
 371         return g_variant_new_string (g_value_get_string (value));
 372       else if (g_variant_type_equal (expected_type, G_VARIANT_TYPE_BYTESTRING))
 373         return g_variant_new_bytestring (g_value_get_string (value));
 374       else if (g_variant_type_equal (expected_type, G_VARIANT_TYPE_OBJECT_PATH))
 375         return g_variant_new_object_path (g_value_get_string (value));
 376       else if (g_variant_type_equal (expected_type, G_VARIANT_TYPE_SIGNATURE))
 377         return g_variant_new_signature (g_value_get_string (value));
 378     }
 379
 380   else if (G_VALUE_HOLDS (value, G_TYPE_STRV))
 381     {
 382       if (g_value_get_boxed (value) == NULL)
 383         return NULL;
 384       return g_variant_new_strv ((const gchar **) g_value_get_boxed (value),
 385                                  -1);
 386     }
 387
 388   else if (G_VALUE_HOLDS_ENUM (value))
 389     {
 390       GEnumValue *enumval;
 391       GEnumClass *eclass;
 392
 393       /* GParamSpecEnum holds a ref on the class so we just peek... */
 394       eclass = g_type_class_peek (G_VALUE_TYPE (value));
 395       enumval = g_enum_get_value (eclass, g_value_get_enum (value));
 396
 397       if (enumval)
 398         return g_variant_new_string (enumval->value_nick);
 399       else
 400         return NULL;
 401     }
 402
 403   else if (G_VALUE_HOLDS_FLAGS (value))
 404     {
 405       GVariantBuilder builder;
 406       GFlagsValue *flagsval;
 407       GFlagsClass *fclass;
 408       guint flags;
 409
 410       fclass = g_type_class_peek (G_VALUE_TYPE (value));
 411       flags = g_value_get_flags (value);
 412
 413       g_variant_builder_init (&builder, G_VARIANT_TYPE ("as"));
 414       while (flags)
 415         {
 416           flagsval = g_flags_get_first_value (fclass, flags);
 417
 418           if (flagsval == NULL)
 419             {
 420               g_variant_builder_clear (&builder);
 421               return NULL;
 422             }
 423
 424           g_variant_builder_add (&builder, "s", flagsval->value_nick);
 425           flags &= ~flagsval->value;
 426         }
 427
 428       return g_variant_builder_end (&builder);
 429     }
 430
 431   type_string = g_variant_type_dup_string (expected_type);
 432   g_critical ("No GSettings bind handler for type \"%s\".", type_string);
 433   g_free (type_string);
 434
 435   return NULL;
 436 }
 437
 438 gboolean
 439 g_settings_get_mapping (GValue   *value,
 440                         GVariant *variant,
 441                         gpointer  user_data)
 442 {
 443   if (g_variant_is_of_type (variant, G_VARIANT_TYPE_BOOLEAN))
 444     {
 445       if (!G_VALUE_HOLDS_BOOLEAN (value))
 446         return FALSE;
 447       g_value_set_boolean (value, g_variant_get_boolean (variant));
 448       return TRUE;
 449     }
 450
 451   else if (g_variant_is_of_type (variant, G_VARIANT_TYPE_BYTE))
 452     {
 453       if (G_VALUE_HOLDS_UCHAR (value))
 454         g_value_set_uchar (value, g_variant_get_byte (variant));
 455       else if (G_VALUE_HOLDS_CHAR (value))
 456         g_value_set_schar (value, (gint8)g_variant_get_byte (variant));
 457       else
 458         return FALSE;
 459       return TRUE;
 460     }
 461
 462   else if (g_variant_is_of_type (variant, G_VARIANT_TYPE_INT16)  ||
 463            g_variant_is_of_type (variant, G_VARIANT_TYPE_INT32)  ||
 464            g_variant_is_of_type (variant, G_VARIANT_TYPE_INT64))
 465     return g_settings_get_mapping_int (value, variant);
 466
 467   else if (g_variant_is_of_type (variant, G_VARIANT_TYPE_DOUBLE))
 468     return g_settings_get_mapping_float (value, variant);
 469
 470   else if (g_variant_is_of_type (variant, G_VARIANT_TYPE_UINT16) ||
 471            g_variant_is_of_type (variant, G_VARIANT_TYPE_UINT32) ||
 472            g_variant_is_of_type (variant, G_VARIANT_TYPE_UINT64) ||
 473            g_variant_is_of_type (variant, G_VARIANT_TYPE_HANDLE))
 474     return g_settings_get_mapping_unsigned_int (value, variant);
 475
 476   else if (g_variant_is_of_type (variant, G_VARIANT_TYPE_STRING)      ||
 477            g_variant_is_of_type (variant, G_VARIANT_TYPE_OBJECT_PATH) ||
 478            g_variant_is_of_type (variant, G_VARIANT_TYPE_SIGNATURE))
 479     {
 480       if (G_VALUE_HOLDS_STRING (value))
 481         {
 482           g_value_set_string (value, g_variant_get_string (variant, NULL));
 483           return TRUE;
 484         }
 485
 486       else if (G_VALUE_HOLDS_ENUM (value))
 487         {
 488           GEnumClass *eclass;
 489           GEnumValue *evalue;
 490           const gchar *nick;
 491
 492           /* GParamSpecEnum holds a ref on the class so we just peek... */
 493           eclass = g_type_class_peek (G_VALUE_TYPE (value));
 494           nick = g_variant_get_string (variant, NULL);
 495           evalue = g_enum_get_value_by_nick (eclass, nick);
 496
 497           if (evalue)
 498             {
 499              g_value_set_enum (value, evalue->value);
 500              return TRUE;
 501             }
 502
 503           g_warning ("Unable to lookup enum nick '%s' via GType\n", nick);
 504           return FALSE;
 505         }
 506     }
 507   else if (g_variant_is_of_type (variant, G_VARIANT_TYPE ("as")))
 508     {
 509       if (G_VALUE_HOLDS (value, G_TYPE_STRV))
 510         {
 511           g_value_take_boxed (value, g_variant_dup_strv (variant, NULL));
 512           return TRUE;
 513         }
 514
 515       else if (G_VALUE_HOLDS_FLAGS (value))
 516         {
 517           GFlagsClass *fclass;
 518           GFlagsValue *fvalue;
 519           const gchar *nick;
 520           GVariantIter iter;
 521           guint flags = 0;
 522
 523           fclass = g_type_class_peek (G_VALUE_TYPE (value));
 524
 525           g_variant_iter_init (&iter, variant);
 526           while (g_variant_iter_next (&iter, "&s", &nick))
 527             {
 528               fvalue = g_flags_get_value_by_nick (fclass, nick);
 529
 530               if (fvalue)
 531                 flags |= fvalue->value;
 532
 533               else
 534                 {
 535                   g_warning ("Unable to lookup flags nick '%s' via GType\n",
 536                              nick);
 537                   return FALSE;
 538                 }
 539             }
 540
 541           g_value_set_flags (value, flags);
 542           return TRUE;
 543         }
 544     }
 545   else if (g_variant_is_of_type (variant, G_VARIANT_TYPE_BYTESTRING))
 546     {
 547       g_value_set_string (value, g_variant_get_bytestring (variant));
 548       return TRUE;
 549     }
 550
 551   g_critical ("No GSettings bind handler for type \"%s\".",
 552               g_variant_get_type_string (variant));
 553
 554   return FALSE;
 555 }
 556
 557 gboolean
 558 g_settings_mapping_is_compatible (GType               gvalue_type,
 559                                   const GVariantType *variant_type)
 560 {
 561   gboolean ok = FALSE;
 562
 563   if (gvalue_type == G_TYPE_BOOLEAN)
 564     ok = g_variant_type_equal (variant_type, G_VARIANT_TYPE_BOOLEAN);
 565   else if (gvalue_type == G_TYPE_CHAR  ||
 566            gvalue_type == G_TYPE_UCHAR)
 567     ok = g_variant_type_equal (variant_type, G_VARIANT_TYPE_BYTE);
 568   else if (gvalue_type == G_TYPE_INT    ||
 569            gvalue_type == G_TYPE_UINT   ||
 570            gvalue_type == G_TYPE_INT64  ||
 571            gvalue_type == G_TYPE_UINT64 ||
 572            gvalue_type == G_TYPE_DOUBLE)
 573     ok = (g_variant_type_equal (variant_type, G_VARIANT_TYPE_INT16)  ||
 574           g_variant_type_equal (variant_type, G_VARIANT_TYPE_UINT16) ||
 575           g_variant_type_equal (variant_type, G_VARIANT_TYPE_INT32)  ||
 576           g_variant_type_equal (variant_type, G_VARIANT_TYPE_UINT32) ||
 577           g_variant_type_equal (variant_type, G_VARIANT_TYPE_INT64)  ||
 578           g_variant_type_equal (variant_type, G_VARIANT_TYPE_UINT64) ||
 579           g_variant_type_equal (variant_type, G_VARIANT_TYPE_HANDLE) ||
 580           g_variant_type_equal (variant_type, G_VARIANT_TYPE_DOUBLE));
 581   else if (gvalue_type == G_TYPE_STRING)
 582     ok = (g_variant_type_equal (variant_type, G_VARIANT_TYPE_STRING)      ||
 583           g_variant_type_equal (variant_type, G_VARIANT_TYPE ("ay")) ||
 584           g_variant_type_equal (variant_type, G_VARIANT_TYPE_OBJECT_PATH) ||
 585           g_variant_type_equal (variant_type, G_VARIANT_TYPE_SIGNATURE));
 586   else if (gvalue_type == G_TYPE_STRV)
 587     ok = g_variant_type_equal (variant_type, G_VARIANT_TYPE ("as"));
 588   else if (G_TYPE_IS_ENUM (gvalue_type))
 589     ok = g_variant_type_equal (variant_type, G_VARIANT_TYPE_STRING);
 590   else if (G_TYPE_IS_FLAGS (gvalue_type))
 591     ok = g_variant_type_equal (variant_type, G_VARIANT_TYPE ("as"));
 592
 593   return ok;
 594 }