1 /* GTK - The GIMP Toolkit
2 * Copyright (C) 1995-1997 Peter Mattis, Spencer Kimball and Josh MacDonald
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.
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.
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.
21 * Modified by the GTK+ Team and others 1997-2000. See the AUTHORS
22 * file for a list of people on the GTK+ Team. See the ChangeLog
23 * files for a list of changes. These files are distributed with
24 * GTK+ at ftp://ftp.gtk.org/pub/gtk/.
31 #include "gtkobject.h"
33 #include "gtkmarshalers.h"
34 #include "gtksignal.h"
35 #include "gtkprivate.h"
49 extern void gtk_object_init_type (void); /* for gtktypeutils.h */
50 static void gtk_object_base_class_init (GtkObjectClass *class);
51 static void gtk_object_base_class_finalize (GtkObjectClass *class);
52 static void gtk_object_class_init (GtkObjectClass *klass);
53 static void gtk_object_init (GtkObject *object,
54 GtkObjectClass *klass);
55 static void gtk_object_set_property (GObject *object,
59 static void gtk_object_get_property (GObject *object,
63 static void gtk_object_dispose (GObject *object);
64 static void gtk_object_real_destroy (GtkObject *object);
65 static void gtk_object_finalize (GObject *object);
66 static void gtk_object_notify_weaks (GtkObject *object);
68 static gpointer parent_class = NULL;
69 static guint object_signals[LAST_SIGNAL] = { 0 };
70 static GQuark quark_weakrefs = 0;
73 /****************************************************
74 * GtkObject type, class and instance initialization
76 ****************************************************/
79 gtk_object_get_type (void)
81 static GType object_type = 0;
85 static const GTypeInfo object_info =
87 sizeof (GtkObjectClass),
88 (GBaseInitFunc) gtk_object_base_class_init,
89 (GBaseFinalizeFunc) gtk_object_base_class_finalize,
90 (GClassInitFunc) gtk_object_class_init,
91 NULL, /* class_finalize */
92 NULL, /* class_data */
95 (GInstanceInitFunc) gtk_object_init,
96 NULL, /* value_table */
99 object_type = g_type_register_static (G_TYPE_INITIALLY_UNOWNED, I_("GtkObject"),
100 &object_info, G_TYPE_FLAG_ABSTRACT);
107 gtk_object_base_class_init (GtkObjectClass *class)
109 /* reset instance specifc methods that don't get inherited */
110 class->get_arg = NULL;
111 class->set_arg = NULL;
115 gtk_object_base_class_finalize (GtkObjectClass *class)
119 static inline gboolean
120 gtk_arg_set_from_value (GtkArg *arg,
122 gboolean copy_string)
124 switch (G_TYPE_FUNDAMENTAL (arg->type))
126 case G_TYPE_CHAR: GTK_VALUE_CHAR (*arg) = g_value_get_char (value); break;
127 case G_TYPE_UCHAR: GTK_VALUE_UCHAR (*arg) = g_value_get_uchar (value); break;
128 case G_TYPE_BOOLEAN: GTK_VALUE_BOOL (*arg) = g_value_get_boolean (value); break;
129 case G_TYPE_INT: GTK_VALUE_INT (*arg) = g_value_get_int (value); break;
130 case G_TYPE_UINT: GTK_VALUE_UINT (*arg) = g_value_get_uint (value); break;
131 case G_TYPE_LONG: GTK_VALUE_LONG (*arg) = g_value_get_long (value); break;
132 case G_TYPE_ULONG: GTK_VALUE_ULONG (*arg) = g_value_get_ulong (value); break;
133 case G_TYPE_ENUM: GTK_VALUE_ENUM (*arg) = g_value_get_enum (value); break;
134 case G_TYPE_FLAGS: GTK_VALUE_FLAGS (*arg) = g_value_get_flags (value); break;
135 case G_TYPE_FLOAT: GTK_VALUE_FLOAT (*arg) = g_value_get_float (value); break;
136 case G_TYPE_DOUBLE: GTK_VALUE_DOUBLE (*arg) = g_value_get_double (value); break;
137 case G_TYPE_BOXED: GTK_VALUE_BOXED (*arg) = g_value_get_boxed (value); break;
138 case G_TYPE_POINTER: GTK_VALUE_POINTER (*arg) = g_value_get_pointer (value); break;
139 case G_TYPE_OBJECT: GTK_VALUE_POINTER (*arg) = g_value_get_object (value); break;
140 case G_TYPE_STRING: if (copy_string)
141 GTK_VALUE_STRING (*arg) = g_value_dup_string (value);
143 GTK_VALUE_STRING (*arg) = (char *) g_value_get_string (value);
151 static inline gboolean
152 gtk_arg_to_value (GtkArg *arg,
155 switch (G_TYPE_FUNDAMENTAL (arg->type))
157 case G_TYPE_CHAR: g_value_set_char (value, GTK_VALUE_CHAR (*arg)); break;
158 case G_TYPE_UCHAR: g_value_set_uchar (value, GTK_VALUE_UCHAR (*arg)); break;
159 case G_TYPE_BOOLEAN: g_value_set_boolean (value, GTK_VALUE_BOOL (*arg)); break;
160 case G_TYPE_INT: g_value_set_int (value, GTK_VALUE_INT (*arg)); break;
161 case G_TYPE_UINT: g_value_set_uint (value, GTK_VALUE_UINT (*arg)); break;
162 case G_TYPE_LONG: g_value_set_long (value, GTK_VALUE_LONG (*arg)); break;
163 case G_TYPE_ULONG: g_value_set_ulong (value, GTK_VALUE_ULONG (*arg)); break;
164 case G_TYPE_ENUM: g_value_set_enum (value, GTK_VALUE_ENUM (*arg)); break;
165 case G_TYPE_FLAGS: g_value_set_flags (value, GTK_VALUE_FLAGS (*arg)); break;
166 case G_TYPE_FLOAT: g_value_set_float (value, GTK_VALUE_FLOAT (*arg)); break;
167 case G_TYPE_DOUBLE: g_value_set_double (value, GTK_VALUE_DOUBLE (*arg)); break;
168 case G_TYPE_STRING: g_value_set_string (value, GTK_VALUE_STRING (*arg)); break;
169 case G_TYPE_BOXED: g_value_set_boxed (value, GTK_VALUE_BOXED (*arg)); break;
170 case G_TYPE_POINTER: g_value_set_pointer (value, GTK_VALUE_POINTER (*arg)); break;
171 case G_TYPE_OBJECT: g_value_set_object (value, GTK_VALUE_POINTER (*arg)); break;
179 gtk_arg_proxy_set_property (GObject *object,
184 GtkObjectClass *class = g_type_class_peek (pspec->owner_type);
187 g_return_if_fail (class->set_arg != NULL);
189 memset (&arg, 0, sizeof (arg));
190 arg.type = G_VALUE_TYPE (value);
191 gtk_arg_set_from_value (&arg, value, FALSE);
192 arg.name = pspec->name;
193 class->set_arg (GTK_OBJECT (object), &arg, property_id);
197 gtk_arg_proxy_get_property (GObject *object,
202 GtkObjectClass *class = g_type_class_peek (pspec->owner_type);
205 g_return_if_fail (class->get_arg != NULL);
207 memset (&arg, 0, sizeof (arg));
208 arg.type = G_VALUE_TYPE (value);
209 arg.name = pspec->name;
210 class->get_arg (GTK_OBJECT (object), &arg, property_id);
211 gtk_arg_to_value (&arg, value);
215 gtk_object_add_arg_type (const gchar *arg_name,
220 GObjectClass *oclass;
222 gchar *type_name, *pname;
225 g_return_if_fail (arg_name != NULL);
226 g_return_if_fail (arg_type > G_TYPE_NONE);
227 g_return_if_fail (arg_id > 0);
228 g_return_if_fail (arg_flags & G_PARAM_READWRITE);
229 if (arg_flags & G_PARAM_CONSTRUCT)
230 g_return_if_fail ((arg_flags & G_PARAM_CONSTRUCT_ONLY) == 0);
231 if (arg_flags & (G_PARAM_CONSTRUCT | G_PARAM_CONSTRUCT_ONLY))
232 g_return_if_fail (arg_flags & G_PARAM_WRITABLE);
233 g_return_if_fail ((arg_flags & ~(G_PARAM_READWRITE | G_PARAM_CONSTRUCT | G_PARAM_CONSTRUCT_ONLY | G_PARAM_STATIC_NAME)) == 0);
235 pname = strchr (arg_name, ':');
236 g_return_if_fail (pname && pname[1] == ':');
238 type_name = g_strndup (arg_name, pname - arg_name);
240 type = g_type_from_name (type_name);
242 g_return_if_fail (G_TYPE_IS_OBJECT (type));
244 oclass = gtk_type_class (type);
245 if (arg_flags & G_PARAM_READABLE)
247 if (oclass->get_property && oclass->get_property != gtk_arg_proxy_get_property)
249 g_warning (G_STRLOC ": GtkArg compatibility code can't be mixed with customized %s.get_property() implementation",
253 oclass->get_property = gtk_arg_proxy_get_property;
255 if (arg_flags & G_PARAM_WRITABLE)
257 if (oclass->set_property && oclass->set_property != gtk_arg_proxy_set_property)
259 g_warning (G_STRLOC ": GtkArg compatibility code can't be mixed with customized %s.set_property() implementation",
263 oclass->set_property = gtk_arg_proxy_set_property;
265 switch (G_TYPE_FUNDAMENTAL (arg_type))
268 pspec = g_param_spec_enum (pname, NULL, NULL, arg_type, 0, arg_flags);
271 pspec = g_param_spec_flags (pname, NULL, NULL, arg_type, 0, arg_flags);
274 pspec = g_param_spec_char (pname, NULL, NULL, -128, 127, 0, arg_flags);
277 pspec = g_param_spec_uchar (pname, NULL, NULL, 0, 255, 0, arg_flags);
280 pspec = g_param_spec_boolean (pname, NULL, NULL, FALSE, arg_flags);
283 pspec = g_param_spec_int (pname, NULL, NULL, G_MININT, G_MAXINT, 0, arg_flags);
286 pspec = g_param_spec_uint (pname, NULL, NULL, 0, G_MAXUINT, 0, arg_flags);
289 pspec = g_param_spec_float (pname, NULL, NULL, -G_MAXFLOAT, G_MAXFLOAT, 0, arg_flags);
292 pspec = g_param_spec_double (pname, NULL, NULL, -G_MAXDOUBLE, G_MAXDOUBLE, 0, arg_flags);
295 pspec = g_param_spec_string (pname, NULL, NULL, NULL, arg_flags);
298 pspec = g_param_spec_pointer (pname, NULL, NULL, arg_flags);
301 pspec = g_param_spec_object (pname, NULL, NULL, arg_type, arg_flags);
304 if (!G_TYPE_IS_FUNDAMENTAL (arg_type))
306 pspec = g_param_spec_boxed (pname, NULL, NULL, arg_type, arg_flags);
310 g_warning (G_STRLOC ": Property type `%s' is not supported by the GtkArg compatibility code",
311 g_type_name (arg_type));
314 g_object_class_install_property (oclass, arg_id, pspec);
318 gtk_object_floating_flag_handler (GtkObject *object,
321 /* FIXME: remove this whole thing once GTK+ breaks ABI */
325 case +1: /* force floating if possible */
327 oldvalue = g_atomic_int_get (&object->flags);
328 while (!g_atomic_int_compare_and_exchange (&object->flags, oldvalue, oldvalue | GTK_FLOATING));
329 return oldvalue & GTK_FLOATING;
330 case -1: /* sink if possible */
332 oldvalue = g_atomic_int_get (&object->flags);
333 while (!g_atomic_int_compare_and_exchange (&object->flags, oldvalue, oldvalue & ~(guint32) GTK_FLOATING));
334 return oldvalue & GTK_FLOATING;
335 default: /* check floating */
336 return 0 != (g_atomic_int_get (&object->flags) & GTK_FLOATING);
341 gtk_object_class_init (GtkObjectClass *class)
343 GObjectClass *gobject_class = G_OBJECT_CLASS (class);
345 parent_class = g_type_class_ref (G_TYPE_OBJECT);
347 g_object_compat_control (2, gtk_object_floating_flag_handler);
349 gobject_class->set_property = gtk_object_set_property;
350 gobject_class->get_property = gtk_object_get_property;
351 gobject_class->dispose = gtk_object_dispose;
352 gobject_class->finalize = gtk_object_finalize;
354 class->destroy = gtk_object_real_destroy;
356 g_object_class_install_property (gobject_class,
358 g_param_spec_pointer ("user-data",
360 P_("Anonymous User Data Pointer"),
361 GTK_PARAM_READWRITE));
362 object_signals[DESTROY] =
363 g_signal_new (I_("destroy"),
364 G_TYPE_FROM_CLASS (gobject_class),
365 G_SIGNAL_RUN_CLEANUP | G_SIGNAL_NO_RECURSE | G_SIGNAL_NO_HOOKS,
366 G_STRUCT_OFFSET (GtkObjectClass, destroy),
368 _gtk_marshal_VOID__VOID,
373 gtk_object_init (GtkObject *object,
374 GtkObjectClass *klass)
378 /********************************************
379 * Functions to end a GtkObject's life time
381 ********************************************/
383 gtk_object_destroy (GtkObject *object)
385 g_return_if_fail (object != NULL);
386 g_return_if_fail (GTK_IS_OBJECT (object));
388 if (!(GTK_OBJECT_FLAGS (object) & GTK_IN_DESTRUCTION))
389 g_object_run_dispose (G_OBJECT (object));
393 gtk_object_dispose (GObject *gobject)
395 GtkObject *object = GTK_OBJECT (gobject);
397 /* guard against reinvocations during
398 * destruction with the GTK_IN_DESTRUCTION flag.
400 if (!(GTK_OBJECT_FLAGS (object) & GTK_IN_DESTRUCTION))
402 GTK_OBJECT_SET_FLAGS (object, GTK_IN_DESTRUCTION);
404 g_signal_emit (object, object_signals[DESTROY], 0);
406 GTK_OBJECT_UNSET_FLAGS (object, GTK_IN_DESTRUCTION);
409 G_OBJECT_CLASS (parent_class)->dispose (gobject);
413 gtk_object_real_destroy (GtkObject *object)
415 g_signal_handlers_destroy (object);
419 gtk_object_finalize (GObject *gobject)
421 GtkObject *object = GTK_OBJECT (gobject);
423 if (g_object_is_floating (object))
425 g_warning ("A floating object was finalized. This means that someone\n"
426 "called g_object_unref() on an object that had only a floating\n"
427 "reference; the initial floating reference is not owned by anyone\n"
428 "and must be removed with g_object_ref_sink().");
431 gtk_object_notify_weaks (object);
433 G_OBJECT_CLASS (parent_class)->finalize (gobject);
436 /*****************************************
437 * GtkObject argument handlers
439 *****************************************/
442 gtk_object_set_property (GObject *object,
450 g_object_set_data (G_OBJECT (object), I_("user_data"), g_value_get_pointer (value));
453 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
459 gtk_object_get_property (GObject *object,
467 g_value_set_pointer (value, g_object_get_data (G_OBJECT (object), "user_data"));
470 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
476 gtk_object_sink (GtkObject *object)
478 g_return_if_fail (GTK_IS_OBJECT (object));
479 g_object_ref_sink (object);
480 g_object_unref (object);
483 /*****************************************
486 * Weak refs are very similar to the old "destroy" signal. They allow
487 * one to register a callback that is called when the weakly
488 * referenced object is finalized.
490 * They are not implemented as a signal because they really are
491 * special and need to be used with great care. Unlike signals, which
492 * should be able to execute any code whatsoever.
494 * A weakref callback is not allowed to retain a reference to the
495 * object. Object data keys may be retrieved in a weak reference
498 * A weakref callback is called at most once.
500 *****************************************/
502 typedef struct _GtkWeakRef GtkWeakRef;
507 GtkDestroyNotify notify;
512 gtk_object_weakref (GtkObject *object,
513 GtkDestroyNotify notify,
518 g_return_if_fail (notify != NULL);
519 g_return_if_fail (GTK_IS_OBJECT (object));
522 quark_weakrefs = g_quark_from_static_string ("gtk-weakrefs");
524 weak = g_new (GtkWeakRef, 1);
525 weak->next = g_object_get_qdata (G_OBJECT (object), quark_weakrefs);
526 weak->notify = notify;
528 g_object_set_qdata (G_OBJECT (object), quark_weakrefs, weak);
532 gtk_object_weakunref (GtkObject *object,
533 GtkDestroyNotify notify,
536 GtkWeakRef *weaks, *w, **wp;
538 g_return_if_fail (GTK_IS_OBJECT (object));
543 weaks = g_object_get_qdata (G_OBJECT (object), quark_weakrefs);
544 for (wp = &weaks; *wp; wp = &(*wp)->next)
547 if (w->notify == notify && w->data == data)
550 g_object_set_qdata (G_OBJECT (object), quark_weakrefs, w->next);
560 gtk_object_notify_weaks (GtkObject *object)
566 w1 = g_object_get_qdata (G_OBJECT (object), quark_weakrefs);
570 w1->notify (w1->data);
579 gtk_object_new (GtkType object_type,
580 const gchar *first_property_name,
586 g_return_val_if_fail (G_TYPE_IS_OBJECT (object_type), NULL);
588 va_start (var_args, first_property_name);
589 object = (GtkObject *)g_object_new_valist (object_type, first_property_name, var_args);
596 gtk_object_get (GtkObject *object,
597 const gchar *first_property_name,
602 g_return_if_fail (GTK_IS_OBJECT (object));
604 va_start (var_args, first_property_name);
605 g_object_get_valist (G_OBJECT (object), first_property_name, var_args);
610 gtk_object_set (GtkObject *object,
611 const gchar *first_property_name,
616 g_return_if_fail (GTK_IS_OBJECT (object));
618 va_start (var_args, first_property_name);
619 g_object_set_valist (G_OBJECT (object), first_property_name, var_args);
623 /*****************************************
624 * GtkObject object_data mechanism
626 *****************************************/
629 gtk_object_set_data_by_id (GtkObject *object,
633 g_return_if_fail (GTK_IS_OBJECT (object));
635 g_datalist_id_set_data (&G_OBJECT (object)->qdata, data_id, data);
639 gtk_object_set_data (GtkObject *object,
643 g_return_if_fail (GTK_IS_OBJECT (object));
644 g_return_if_fail (key != NULL);
646 g_datalist_set_data (&G_OBJECT (object)->qdata, key, data);
650 gtk_object_set_data_by_id_full (GtkObject *object,
653 GtkDestroyNotify destroy)
655 g_return_if_fail (GTK_IS_OBJECT (object));
657 g_datalist_id_set_data_full (&G_OBJECT (object)->qdata, data_id, data, destroy);
661 gtk_object_set_data_full (GtkObject *object,
664 GtkDestroyNotify destroy)
666 g_return_if_fail (GTK_IS_OBJECT (object));
667 g_return_if_fail (key != NULL);
669 g_datalist_set_data_full (&G_OBJECT (object)->qdata, key, data, destroy);
673 gtk_object_get_data_by_id (GtkObject *object,
676 g_return_val_if_fail (GTK_IS_OBJECT (object), NULL);
678 return g_datalist_id_get_data (&G_OBJECT (object)->qdata, data_id);
682 gtk_object_get_data (GtkObject *object,
685 g_return_val_if_fail (GTK_IS_OBJECT (object), NULL);
686 g_return_val_if_fail (key != NULL, NULL);
688 return g_datalist_get_data (&G_OBJECT (object)->qdata, key);
692 gtk_object_remove_data_by_id (GtkObject *object,
695 g_return_if_fail (GTK_IS_OBJECT (object));
697 g_datalist_id_remove_data (&G_OBJECT (object)->qdata, data_id);
701 gtk_object_remove_data (GtkObject *object,
704 g_return_if_fail (GTK_IS_OBJECT (object));
705 g_return_if_fail (key != NULL);
707 g_datalist_remove_data (&G_OBJECT (object)->qdata, key);
711 gtk_object_remove_no_notify_by_id (GtkObject *object,
714 g_return_if_fail (GTK_IS_OBJECT (object));
716 g_datalist_id_remove_no_notify (&G_OBJECT (object)->qdata, key_id);
720 gtk_object_remove_no_notify (GtkObject *object,
723 g_return_if_fail (GTK_IS_OBJECT (object));
724 g_return_if_fail (key != NULL);
726 g_datalist_remove_no_notify (&G_OBJECT (object)->qdata, key);
730 gtk_object_set_user_data (GtkObject *object,
733 g_return_if_fail (GTK_IS_OBJECT (object));
735 g_object_set_data (G_OBJECT (object), "user_data", data);
739 gtk_object_get_user_data (GtkObject *object)
741 g_return_val_if_fail (GTK_IS_OBJECT (object), NULL);
743 return g_object_get_data (G_OBJECT (object), "user_data");
747 gtk_object_ref (GtkObject *object)
749 g_return_val_if_fail (GTK_IS_OBJECT (object), NULL);
751 return (GtkObject*) g_object_ref ((GObject*) object);
755 gtk_object_unref (GtkObject *object)
757 g_return_if_fail (GTK_IS_OBJECT (object));
759 g_object_unref ((GObject*) object);
762 #define __GTK_OBJECT_C__
763 #include "gtkaliasdef.c"