1 /* GObject - GLib Type, Object, Parameter and Signal Library 2 * Copyright (C) 2001 Red Hat, 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 License, 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 15 * Public 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 20 #include <string.h> 21 22 #undef G_LOG_DOMAIN 23 #define G_LOG_DOMAIN "TestObject" 24 #include <glib-object.h> 25 26 /* --- TestIface --- */ 27 #define TEST_TYPE_IFACE (test_iface_get_type ()) 28 #define TEST_IFACE(obj) (G_TYPE_CHECK_INSTANCE_CAST ((obj), TEST_TYPE_IFACE, TestIface)) 29 #define TEST_IS_IFACE(obj) (G_TYPE_CHECK_INSTANCE_TYPE ((obj), TEST_TYPE_IFACE)) 30 #define TEST_IFACE_GET_CLASS(obj) (G_TYPE_INSTANCE_GET_INTERFACE ((obj), TEST_TYPE_IFACE, TestIfaceClass)) 31 typedef struct _TestIface TestIface; 32 typedef struct _TestIfaceClass TestIfaceClass; 33 struct _TestIfaceClass 34 { 35 GTypeInterface base_iface; 36 void (*print_string) (TestIface *tiobj, 37 const gchar *string); 38 }; 39 static void iface_base_init (TestIfaceClass *iface); 40 static void iface_base_finalize (TestIfaceClass *iface); 41 static void print_foo (TestIface *tiobj, 42 const gchar *string); 43 static GType 44 test_iface_get_type (void) 45 { 46 static GType test_iface_type = 0; 47 48 if (!test_iface_type) 49 { 50 static const GTypeInfo test_iface_info = 51 { 52 sizeof (TestIfaceClass), 53 (GBaseInitFunc) iface_base_init, /* base_init */ 54 (GBaseFinalizeFunc) iface_base_finalize, /* base_finalize */ 55 }; 56 57 test_iface_type = g_type_register_static (G_TYPE_INTERFACE, "TestIface", &test_iface_info, 0); 58 g_type_interface_add_prerequisite (test_iface_type, G_TYPE_OBJECT); 59 } 60 61 return test_iface_type; 62 } 63 static guint iface_base_init_count = 0; 64 static void 65 iface_base_init (TestIfaceClass *iface) 66 { 67 iface_base_init_count++; 68 if (iface_base_init_count == 1) 69 { 70 /* add signals here */ 71 } 72 } 73 static void 74 iface_base_finalize (TestIfaceClass *iface) 75 { 76 iface_base_init_count--; 77 if (iface_base_init_count == 0) 78 { 79 /* destroy signals here */ 80 } 81 } 82 static void 83 print_foo (TestIface *tiobj, 84 const gchar *string) 85 { 86 if (!string) 87 string = "<NULL>"; 88 g_print ("Iface-FOO: \"%s\" from %p\n", string, tiobj); 89 } 90 static void 91 test_object_test_iface_init (gpointer giface, 92 gpointer iface_data) 93 { 94 TestIfaceClass *iface = giface; 95 96 g_assert (iface_data == GUINT_TO_POINTER (42)); 97 98 g_assert (G_TYPE_FROM_INTERFACE (iface) == TEST_TYPE_IFACE); 99 100 /* assert iface_base_init() was already called */ 101 g_assert (iface_base_init_count > 0); 102 103 /* initialize stuff */ 104 iface->print_string = print_foo; 105 } 106 static void 107 iface_print_string (TestIface *tiobj, 108 const gchar *string) 109 { 110 TestIfaceClass *iface; 111 112 g_return_if_fail (TEST_IS_IFACE (tiobj)); 113 g_return_if_fail (G_IS_OBJECT (tiobj)); /* ensured through prerequisite */ 114 115 iface = TEST_IFACE_GET_CLASS (tiobj); 116 g_object_ref (tiobj); 117 iface->print_string (tiobj, string); 118 g_object_unref (tiobj); 119 } 120 121 122 /* --- TestObject --- */ 123 #define TEST_TYPE_OBJECT (test_object_get_type ()) 124 #define TEST_OBJECT(object) (G_TYPE_CHECK_INSTANCE_CAST ((object), TEST_TYPE_OBJECT, TestObject)) 125 #define TEST_OBJECT_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST ((klass), TEST_TYPE_OBJECT, TestObjectClass)) 126 #define TEST_IS_OBJECT(object) (G_TYPE_CHECK_INSTANCE_TYPE ((object), TEST_TYPE_OBJECT)) 127 #define TEST_IS_OBJECT_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass), TEST_TYPE_OBJECT)) 128 #define TEST_OBJECT_GET_CLASS(obj) (G_TYPE_INSTANCE_GET_CLASS ((obj), TEST_TYPE_OBJECT, TestObjectClass)) 129 #define TEST_OBJECT_GET_PRIVATE(o) (G_TYPE_INSTANCE_GET_PRIVATE ((o), TEST_TYPE_OBJECT, TestObjectPrivate)) 130 typedef struct _TestObject TestObject; 131 typedef struct _TestObjectClass TestObjectClass; 132 typedef struct _TestObjectPrivate TestObjectPrivate; 133 struct _TestObject 134 { 135 GObject parent_instance; 136 }; 137 struct _TestObjectClass 138 { 139 GObjectClass parent_class; 140 141 gchar* (*test_signal) (TestObject *tobject, 142 TestIface *iface_object, 143 gpointer tdata); 144 }; 145 struct _TestObjectPrivate 146 { 147 int dummy1; 148 gdouble dummy2; 149 }; 150 static void test_object_class_init (TestObjectClass *class); 151 static void test_object_init (TestObject *tobject); 152 static gboolean test_signal_accumulator (GSignalInvocationHint *ihint, 153 GValue *return_accu, 154 const GValue *handler_return, 155 gpointer data); 156 static gchar* test_object_test_signal (TestObject *tobject, 157 TestIface *iface_object, 158 gpointer tdata); 159 static GType 160 test_object_get_type (void) 161 { 162 static GType test_object_type = 0; 163 164 if (!test_object_type) 165 { 166 static const GTypeInfo test_object_info = 167 { 168 sizeof (TestObjectClass), 169 NULL, /* base_init */ 170 NULL, /* base_finalize */ 171 (GClassInitFunc) test_object_class_init, 172 NULL, /* class_finalize */ 173 NULL, /* class_data */ 174 sizeof (TestObject), 175 5, /* n_preallocs */ 176 (GInstanceInitFunc) test_object_init, 177 }; 178 GInterfaceInfo iface_info = { test_object_test_iface_init, NULL, GUINT_TO_POINTER (42) }; 179 180 test_object_type = g_type_register_static (G_TYPE_OBJECT, "TestObject", &test_object_info, 0); 181 g_type_add_interface_static (test_object_type, TEST_TYPE_IFACE, &iface_info); 182 } 183 184 return test_object_type; 185 } 186 static void 187 test_object_class_init (TestObjectClass *class) 188 { 189 /* GObjectClass *gobject_class = G_OBJECT_CLASS (class); */ 190 191 class->test_signal = test_object_test_signal; 192 193 g_signal_new ("test-signal", 194 G_OBJECT_CLASS_TYPE (class), 195 G_SIGNAL_RUN_FIRST | G_SIGNAL_RUN_LAST | G_SIGNAL_RUN_CLEANUP, 196 G_STRUCT_OFFSET (TestObjectClass, test_signal), 197 test_signal_accumulator, NULL, 198 g_cclosure_marshal_STRING__OBJECT_POINTER, 199 G_TYPE_STRING, 2, TEST_TYPE_IFACE, G_TYPE_POINTER); 200 201 g_type_class_add_private (class, sizeof (TestObjectPrivate)); 202 } 203 static void 204 test_object_init (TestObject *tobject) 205 { 206 TestObjectPrivate *priv; 207 208 priv = TEST_OBJECT_GET_PRIVATE (tobject); 209 210 g_assert (priv); 211 g_assert ((gchar *)priv >= (gchar *)tobject + sizeof (TestObject)); 212 213 priv->dummy1 = 54321; 214 } 215 /* Check to see if private data initialization in the 216 * instance init function works. 217 */ 218 static void 219 test_object_check_private_init (TestObject *tobject) 220 { 221 TestObjectPrivate *priv; 222 223 priv = TEST_OBJECT_GET_PRIVATE (tobject); 224 225 g_print ("private data during initialization: %u == %u\n", priv->dummy1, 54321); 226 g_assert (priv->dummy1 == 54321); 227 } 228 static gboolean 229 test_signal_accumulator (GSignalInvocationHint *ihint, 230 GValue *return_accu, 231 const GValue *handler_return, 232 gpointer data) 233 { 234 gchar *accu_string = g_value_get_string (return_accu); 235 gchar *new_string = g_value_get_string (handler_return); 236 gchar *result_string; 237 238 if (accu_string) 239 result_string = g_strconcat (accu_string, new_string, NULL); 240 else if (new_string) 241 result_string = g_strdup (new_string); 242 else 243 result_string = NULL; 244 245 g_value_take_string (return_accu, result_string); 246 247 return TRUE; 248 } 249 static gchar* 250 test_object_test_signal (TestObject *tobject, 251 TestIface *iface_object, 252 gpointer tdata) 253 { 254 g_message ("::test_signal default_handler called"); 255 256 g_return_val_if_fail (TEST_IS_IFACE (iface_object), NULL); 257 258 return g_strdup ("<default_handler>"); 259 } 260 261 262 /* --- TestIface for DerivedObject --- */ 263 static void 264 print_bar (TestIface *tiobj, 265 const gchar *string) 266 { 267 TestIfaceClass *parent_iface; 268 269 g_return_if_fail (TEST_IS_IFACE (tiobj)); 270 271 if (!string) 272 string = "<NULL>"; 273 g_print ("Iface-BAR: \"%s\" from %p\n", string, tiobj); 274 275 g_print ("chaining: "); 276 parent_iface = g_type_interface_peek_parent (TEST_IFACE_GET_CLASS (tiobj)); 277 parent_iface->print_string (tiobj, string); 278 279 g_assert (g_type_interface_peek_parent (parent_iface) == NULL); 280 } 281 282 static void 283 derived_object_test_iface_init (gpointer giface, 284 gpointer iface_data) 285 { 286 TestIfaceClass *iface = giface; 287 288 g_assert (iface_data == GUINT_TO_POINTER (87)); 289 290 g_assert (G_TYPE_FROM_INTERFACE (iface) == TEST_TYPE_IFACE); 291 292 /* assert test_object_test_iface_init() was already called */ 293 g_assert (iface->print_string == print_foo); 294 295 /* override stuff */ 296 iface->print_string = print_bar; 297 } 298 299 300 /* --- DerivedObject --- */ 301 #define DERIVED_TYPE_OBJECT (derived_object_get_type ()) 302 #define DERIVED_OBJECT(object) (G_TYPE_CHECK_INSTANCE_CAST ((object), DERIVED_TYPE_OBJECT, DerivedObject)) 303 #define DERIVED_OBJECT_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST ((klass), DERIVED_TYPE_OBJECT, DerivedObjectClass)) 304 #define DERIVED_IS_OBJECT(object) (G_TYPE_CHECK_INSTANCE_TYPE ((object), DERIVED_TYPE_OBJECT)) 305 #define DERIVED_IS_OBJECT_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass), DERIVED_TYPE_OBJECT)) 306 #define DERIVED_OBJECT_GET_CLASS(obj) (G_TYPE_INSTANCE_GET_CLASS ((obj), DERIVED_TYPE_OBJECT, DerivedObjectClass)) 307 #define DERIVED_OBJECT_GET_PRIVATE(o) (G_TYPE_INSTANCE_GET_PRIVATE ((o), DERIVED_TYPE_OBJECT, DerivedObjectPrivate)) 308 typedef struct _DerivedObject DerivedObject; 309 typedef struct _TestObjectClass DerivedObjectClass; 310 typedef struct _DerivedObjectPrivate DerivedObjectPrivate; 311 struct _DerivedObject 312 { 313 TestObject parent_instance; 314 int dummy1; 315 int dummy2; 316 }; 317 struct _DerivedObjectPrivate 318 { 319 char dummy; 320 }; 321 static void derived_object_class_init (DerivedObjectClass *class); 322 static void derived_object_init (DerivedObject *dobject); 323 GType 324 derived_object_get_type (void) 325 { 326 static GType derived_object_type = 0; 327 328 if (!derived_object_type) 329 { 330 static const GTypeInfo derived_object_info = 331 { 332 sizeof (DerivedObjectClass), 333 NULL, /* base_init */ 334 NULL, /* base_finalize */ 335 (GClassInitFunc) derived_object_class_init, 336 NULL, /* class_finalize */ 337 NULL, /* class_data */ 338 sizeof (DerivedObject), 339 5, /* n_preallocs */ 340 (GInstanceInitFunc) derived_object_init, 341 }; 342 GInterfaceInfo iface_info = { derived_object_test_iface_init, NULL, GUINT_TO_POINTER (87) }; 343 344 derived_object_type = g_type_register_static (TEST_TYPE_OBJECT, "DerivedObject", &derived_object_info, 0); 345 g_type_add_interface_static (derived_object_type, TEST_TYPE_IFACE, &iface_info); 346 } 347 348 return derived_object_type; 349 } 350 static void 351 derived_object_class_init (DerivedObjectClass *class) 352 { 353 g_type_class_add_private (class, sizeof (DerivedObjectPrivate)); 354 } 355 static void 356 derived_object_init (DerivedObject *dobject) 357 { 358 TestObjectPrivate *test_priv; 359 DerivedObjectPrivate *derived_priv; 360 361 derived_priv = DERIVED_OBJECT_GET_PRIVATE (dobject); 362 363 g_assert (derived_priv); 364 g_assert ((gchar *)derived_priv >= (gchar *)TEST_OBJECT_GET_PRIVATE (dobject) + sizeof (TestObjectPrivate)); 365 366 test_priv = TEST_OBJECT_GET_PRIVATE (dobject); 367 368 g_assert (test_priv); 369 g_assert ((gchar *)test_priv >= (gchar *)dobject + sizeof (TestObject)); 370 371 } 372 373 /* --- main --- */ 374 int 375 main (int argc, 376 char *argv[]) 377 { 378 GTypeInfo info = { 0, }; 379 GTypeFundamentalInfo finfo = { 0, }; 380 GType type; 381 TestObject *sigarg; 382 DerivedObject *dobject; 383 TestObjectPrivate *priv; 384 gchar *string = NULL; 385 386 g_log_set_always_fatal (g_log_set_always_fatal (G_LOG_FATAL_MASK) | 387 G_LOG_LEVEL_WARNING | 388 G_LOG_LEVEL_CRITICAL); 389 g_type_init_with_debug_flags (G_TYPE_DEBUG_OBJECTS | G_TYPE_DEBUG_SIGNALS); 390 391 /* test new fundamentals */ 392 g_assert (G_TYPE_MAKE_FUNDAMENTAL (G_TYPE_RESERVED_USER_FIRST) == g_type_fundamental_next ()); 393 type = g_type_register_fundamental (g_type_fundamental_next (), "FooShadow1", &info, &finfo, 0); 394 g_assert (G_TYPE_MAKE_FUNDAMENTAL (G_TYPE_RESERVED_USER_FIRST + 1) == g_type_fundamental_next ()); 395 type = g_type_register_fundamental (g_type_fundamental_next (), "FooShadow2", &info, &finfo, 0); 396 g_assert (G_TYPE_MAKE_FUNDAMENTAL (G_TYPE_RESERVED_USER_FIRST + 2) == g_type_fundamental_next ()); 397 g_assert (g_type_from_name ("FooShadow1") == G_TYPE_MAKE_FUNDAMENTAL (G_TYPE_RESERVED_USER_FIRST)); 398 g_assert (g_type_from_name ("FooShadow2") == G_TYPE_MAKE_FUNDAMENTAL (G_TYPE_RESERVED_USER_FIRST + 1)); 399 400 /* to test past class initialization interface setups, create the class here */ 401 g_type_class_ref (TEST_TYPE_OBJECT); 402 403 dobject = g_object_new (DERIVED_TYPE_OBJECT, NULL); 404 test_object_check_private_init (TEST_OBJECT (dobject)); 405 406 sigarg = g_object_new (TEST_TYPE_OBJECT, NULL); 407 408 g_print ("MAIN: emit test-signal:\n"); 409 g_signal_emit_by_name (dobject, "test-signal", sigarg, NULL, &string); 410 g_message ("signal return: \"%s\"", string); 411 g_assert (strcmp (string, "<default_handler><default_handler>") == 0); 412 g_free (string); 413 414 g_print ("MAIN: call iface print-string on test and derived object:\n"); 415 iface_print_string (TEST_IFACE (sigarg), "iface-string-from-test-type"); 416 iface_print_string (TEST_IFACE (dobject), "iface-string-from-derived-type"); 417 418 priv = TEST_OBJECT_GET_PRIVATE (dobject); 419 g_print ("private data after initialization: %u == %u\n", priv->dummy1, 54321); 420 g_assert (priv->dummy1 == 54321); 421 422 g_object_unref (sigarg); 423 g_object_unref (dobject); 424 425 g_message ("%s done", argv[0]); 426 427 return 0; 428 } 429
