AuroraMiddleware/gtk2
1
0
Fork 0
forked from AuroraMiddleware/gtk
Code Issues Pull Requests Projects Releases Wiki Activity
af24aef782
gtk2/gtk/gtkobject.c
Tim Janik af24aef782 handle negative values similar to gtk_widget_set_uposition(). that is: 
Thu Jul 16 01:27:15 1998  Tim Janik  <timj@gtk.org>

        * gtk/gtkwidget.h:
        * gtk/gtkwidget.c (gtk_widget_set_usize): handle negative values
        similar to gtk_widget_set_uposition(). that is: -1=unspecified,
        -2=leave untouched. changed the width/height field of GtkWidgetAuxInfo
        to be gint16s rather than guint16s, since that's what the code expected
        (for a long time actually).

        * gtk/gtkviewport.c:
        added support for object arguments: GtkViewport::shadow_type,
        GtkViewport::vadjustment and GtkViewport::hadjustment.
        (gtk_viewport_add): chain gtk_bin_add.

        * gtk/gtkscrolledwindow.c:
        added support for object argument: GtkScrolledWindow::hscrollbar_policy,
        GtkScrolledWindow::vscrollbar_policy and GtkScrolledWindow::viewport.

        * gtk/gtkadjustment.h:
        * gtk/gtkadjustment.c:
        * gtk/gtkctree.h:
        * gtk/gtkclist.h:
        * gtk/gtkctree.c:
        * gtk/gtkclist.c:
        * gtk/gtkscrolledwindow.h:
        * gtk/gtkscrolledwindow.c:
        * gtk/gtkviewport.h:
        * gtk/gtkviewport.c:
        GtkType and macro fixups.
1998-07-16 02:47:15 +00:00

1283 lines
29 KiB
C
Raw Blame History

/* GTK - The GIMP Toolkit
* Copyright (C) 1995-1997 Peter Mattis, Spencer Kimball and Josh MacDonald
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
#include <stdarg.h>
#include <string.h>
#include <stdio.h>
#include <stdlib.h>
#include "gtkobject.h"
#include "gtksignal.h"
#define GTK_OBJECT_DATA_ID_BLOCK_SIZE (1024)
#define GTK_OBJECT_DATA_BLOCK_SIZE (1024)
enum {
DESTROY,
LAST_SIGNAL
};
enum {
ARG_0,
ARG_USER_DATA,
ARG_SIGNAL,
ARG_SIGNAL_AFTER,
ARG_OBJECT_SIGNAL,
ARG_OBJECT_SIGNAL_AFTER
};
typedef struct _GtkObjectData GtkObjectData;
struct _GtkObjectData
{
guint id;
gpointer data;
GtkDestroyNotify destroy;
GtkObjectData *next;
};
void gtk_object_init_type (void);
static void gtk_object_base_class_init (GtkObjectClass *klass);
static void gtk_object_class_init (GtkObjectClass *klass);
static void gtk_object_init (GtkObject *object);
static void gtk_object_set_arg (GtkObject *object,
GtkArg *arg,
guint arg_id);
static void gtk_object_get_arg (GtkObject *object,
GtkArg *arg,
guint arg_id);
static void gtk_object_shutdown (GtkObject *object);
static void gtk_object_real_destroy (GtkObject *object);
static void gtk_object_finalize (GtkObject *object);
static void gtk_object_notify_weaks (GtkObject *object);
static guint object_signals[LAST_SIGNAL] = { 0 };
static GHashTable *object_arg_info_ht = NULL;
static const gchar *user_data_key = "user_data";
static guint user_data_key_id = 0;
static const gchar *weakrefs_key = "gtk-weakrefs";
static guint weakrefs_key_id = 0;
static GtkObjectData *gtk_object_data_free_list = NULL;
#define GTK_OBJECT_DATA_DESTROY( odata ) { \
if (odata->destroy) \
odata->destroy (odata->data); \
odata->next = gtk_object_data_free_list; \
gtk_object_data_free_list = odata; \
}
#ifdef G_ENABLE_DEBUG
static guint obj_count = 0;
static GHashTable *living_objs_ht = NULL;
static void
gtk_object_debug_foreach (gpointer key, gpointer value, gpointer user_data)
{
GtkObject *object;
object = (GtkObject*) value;
g_print ("GTK-DEBUG: %p: %s ref_count=%d%s%s\n",
object,
gtk_type_name (GTK_OBJECT_TYPE (object)),
object->ref_count,
GTK_OBJECT_FLOATING (object) ? " (floating)" : "",
GTK_OBJECT_DESTROYED (object) ? " (destroyed)" : "");
}
static void
gtk_object_debug (void)
{
g_hash_table_foreach (living_objs_ht, gtk_object_debug_foreach, NULL);
g_print ("GTK-DEBUG: living objects count = %d\n", obj_count);
}
#endif /* G_ENABLE_DEBUG */
/****************************************************
* GtkObject type, class and instance initialization
*
****************************************************/
void
gtk_object_init_type (void)
{
GtkType object_type = 0;
GtkTypeInfo object_info =
{
"GtkObject",
sizeof (GtkObject),
sizeof (GtkObjectClass),
(GtkClassInitFunc) gtk_object_class_init,
(GtkObjectInitFunc) gtk_object_init,
/* reserved_1 */ NULL,
/* reserved_2 */ NULL,
(GtkClassInitFunc) gtk_object_base_class_init,
};
object_type = gtk_type_unique (0, &object_info);
g_assert (object_type == GTK_TYPE_OBJECT);
#ifdef G_ENABLE_DEBUG
if (gtk_debug_flags & GTK_DEBUG_OBJECTS)
ATEXIT (gtk_object_debug);
#endif /* G_ENABLE_DEBUG */
}
GtkType
gtk_object_get_type (void)
{
return GTK_TYPE_OBJECT;
}
static void
gtk_object_base_class_init (GtkObjectClass *class)
{
/* reset instance specific fields that don't get inhrited */
class->signals = NULL;
class->nsignals = 0;
class->n_args = 0;
/* reset instance specifc methods that don't get inherited */
class->get_arg = NULL;
class->set_arg = NULL;
}
static void
gtk_object_class_init (GtkObjectClass *class)
{
gtk_object_add_arg_type ("GtkObject::user_data",
GTK_TYPE_POINTER,
GTK_ARG_READWRITE,
ARG_USER_DATA);
gtk_object_add_arg_type ("GtkObject::signal",
GTK_TYPE_SIGNAL,
GTK_ARG_WRITABLE,
ARG_SIGNAL);
gtk_object_add_arg_type ("GtkObject::signal_after",
GTK_TYPE_SIGNAL,
GTK_ARG_WRITABLE,
ARG_SIGNAL_AFTER);
gtk_object_add_arg_type ("GtkObject::object_signal",
GTK_TYPE_SIGNAL,
GTK_ARG_WRITABLE,
ARG_OBJECT_SIGNAL);
gtk_object_add_arg_type ("GtkObject::object_signal_after",
GTK_TYPE_SIGNAL,
GTK_ARG_WRITABLE,
ARG_OBJECT_SIGNAL_AFTER);
object_signals[DESTROY] =
gtk_signal_new ("destroy",
GTK_RUN_LAST,
class->type,
GTK_SIGNAL_OFFSET (GtkObjectClass, destroy),
gtk_signal_default_marshaller,
GTK_TYPE_NONE, 0);
gtk_object_class_add_signals (class, object_signals, LAST_SIGNAL);
class->get_arg = gtk_object_get_arg;
class->set_arg = gtk_object_set_arg;
class->shutdown = gtk_object_shutdown;
class->destroy = gtk_object_real_destroy;
class->finalize = gtk_object_finalize;
}
static void
gtk_object_init (GtkObject *object)
{
GTK_OBJECT_FLAGS (object) = GTK_FLOATING;
object->ref_count = 1;
object->object_data = NULL;
#ifdef G_ENABLE_DEBUG
if (gtk_debug_flags & GTK_DEBUG_OBJECTS)
{
obj_count++;
if (!living_objs_ht)
living_objs_ht = g_hash_table_new (g_direct_hash, NULL);
g_hash_table_insert (living_objs_ht, object, object);
}
#endif /* G_ENABLE_DEBUG */
}
/********************************************
* Functions to end a GtkObject's life time
*
********************************************/
void
gtk_object_destroy (GtkObject *object)
{
g_return_if_fail (object != NULL);
g_return_if_fail (GTK_IS_OBJECT (object));
if (!GTK_OBJECT_DESTROYED (object))
{
/* we will hold a reference on the object in this place, so
* to ease all classes shutdown and destroy implementations.
* i.e. they don't have to bother about referencing at all.
*/
gtk_object_ref (object);
object->klass->shutdown (object);
gtk_object_unref (object);
}
}
static void
gtk_object_shutdown (GtkObject *object)
{
GTK_OBJECT_SET_FLAGS (object, GTK_DESTROYED);
gtk_signal_emit (object, object_signals[DESTROY]);
}
static void
gtk_object_real_destroy (GtkObject *object)
{
if (GTK_OBJECT_CONNECTED (object))
gtk_signal_handlers_destroy (object);
}
static void
gtk_object_finalize (GtkObject *object)
{
gtk_object_notify_weaks (object);
while (object->object_data)
{
GtkObjectData *odata;
odata = object->object_data;
object->object_data = odata->next;
GTK_OBJECT_DATA_DESTROY (odata);
}
gtk_type_free (GTK_OBJECT_TYPE (object), object);
}
/*****************************************
* GtkObject argument handlers
*
*****************************************/
static void
gtk_object_set_arg (GtkObject *object,
GtkArg *arg,
guint arg_id)
{
guint n = 0;
switch (arg_id)
{
gchar *arg_name;
case ARG_USER_DATA:
gtk_object_set_user_data (object, GTK_VALUE_POINTER (*arg));
break;
case ARG_OBJECT_SIGNAL_AFTER:
n += 6;
case ARG_OBJECT_SIGNAL:
n += 1;
case ARG_SIGNAL_AFTER:
n += 6;
case ARG_SIGNAL:
n += 6;
arg_name = gtk_arg_name_strip_type (arg->name);
if (arg_name &&
arg_name[n] == ':' &&
arg_name[n + 1] == ':' &&
arg_name[n + 2] != 0)
{
gtk_signal_connect_full (object,
arg_name + n + 2,
GTK_VALUE_SIGNAL (*arg).f, NULL,
GTK_VALUE_SIGNAL (*arg).d,
NULL,
(arg_id == ARG_OBJECT_SIGNAL ||
arg_id == ARG_OBJECT_SIGNAL_AFTER),
(arg_id == ARG_OBJECT_SIGNAL_AFTER ||
arg_id == ARG_SIGNAL_AFTER));
}
else
g_warning ("gtk_object_set_arg(): invalid signal argument: \"%s\"\n", arg->name);
break;
default:
break;
}
}
static void
gtk_object_get_arg (GtkObject *object,
GtkArg *arg,
guint arg_id)
{
switch (arg_id)
{
case ARG_USER_DATA:
GTK_VALUE_POINTER (*arg) = gtk_object_get_user_data (object);
break;
case ARG_SIGNAL:
case ARG_OBJECT_SIGNAL:
default:
arg->type = GTK_TYPE_INVALID;
break;
}
}
/*****************************************
* gtk_object_class_add_signals:
*
* arguments:
*
* results:
*****************************************/
void
gtk_object_class_add_signals (GtkObjectClass *class,
guint *signals,
guint nsignals)
{
guint *new_signals;
guint i;
g_return_if_fail (class != NULL);
new_signals = g_new (guint, class->nsignals + nsignals);
for (i = 0; i < class->nsignals; i++)
new_signals[i] = class->signals[i];
for (i = 0; i < nsignals; i++)
new_signals[class->nsignals + i] = signals[i];
g_free (class->signals);
class->signals = new_signals;
class->nsignals += nsignals;
}
guint
gtk_object_class_add_user_signal (GtkObjectClass *class,
const gchar *name,
GtkSignalMarshaller marshaller,
GtkType return_val,
guint nparams,
...)
{
GtkType *params;
guint i;
va_list args;
guint signal_id;
g_return_val_if_fail (class != NULL, 0);
if (nparams > 0)
{
params = g_new (GtkType, nparams);
va_start (args, nparams);
for (i = 0; i < nparams; i++)
params[i] = va_arg (args, GtkType);
va_end (args);
}
else
params = NULL;
signal_id = gtk_signal_newv (name,
0,
class->type,
0,
marshaller,
return_val,
nparams,
params);
g_free (params);
if (signal_id)
gtk_object_class_add_signals (class, &signal_id, 1);
return signal_id;
}
guint
gtk_object_class_user_signal_new (GtkObjectClass *class,
const gchar *name,
GtkSignalRunType signal_flags,
GtkSignalMarshaller marshaller,
GtkType return_val,
guint nparams,
...)
{
GtkType *params;
guint i;
va_list args;
guint signal_id;
g_return_val_if_fail (class != NULL, 0);
if (nparams > 0)
{
params = g_new (GtkType, nparams);
va_start (args, nparams);
for (i = 0; i < nparams; i++)
params[i] = va_arg (args, GtkType);
va_end (args);
}
else
params = NULL;
signal_id = gtk_signal_newv (name,
signal_flags,
class->type,
0,
marshaller,
return_val,
nparams,
params);
g_free (params);
if (signal_id)
gtk_object_class_add_signals (class, &signal_id, 1);
return signal_id;
}
guint
gtk_object_class_user_signal_newv (GtkObjectClass *class,
const gchar *name,
GtkSignalRunType signal_flags,
GtkSignalMarshaller marshaller,
GtkType return_val,
guint nparams,
GtkType *params)
{
guint signal_id;
g_return_val_if_fail (class != NULL, 0);
if (nparams > 0)
g_return_val_if_fail (params != NULL, 0);
signal_id = gtk_signal_newv (name,
signal_flags,
class->type,
0,
marshaller,
return_val,
nparams,
params);
if (signal_id)
gtk_object_class_add_signals (class, &signal_id, 1);
return signal_id;
}
/*****************************************
* gtk_object_sink:
*
* arguments:
*
* results:
*****************************************/
void
gtk_object_sink (GtkObject *object)
{
g_return_if_fail (object != NULL);
g_return_if_fail (GTK_IS_OBJECT (object));
if (GTK_OBJECT_FLOATING (object))
{
GTK_OBJECT_UNSET_FLAGS (object, GTK_FLOATING);
gtk_object_unref (object);
}
}
/*****************************************
* Weak references.
*
* Weak refs are very similar to the old "destroy" signal. They allow
* one to register a callback that is called when the weakly
* referenced object is finalized.
*
* They are not implemented as a signal because they really are
* special and need to be used with great care. Unlike signals, which
* should be able to execute any code whatsoever.
*
* A weakref callback is not allowed to retain a reference to the
* object. Object data keys may be retrieved in a weak reference
* callback.
*
* A weakref callback is called at most once.
*
*****************************************/
typedef struct _GtkWeakRef GtkWeakRef;
struct _GtkWeakRef
{
GtkWeakRef *next;
GtkDestroyNotify notify;
gpointer data;
};
void
gtk_object_weakref (GtkObject *object,
GtkDestroyNotify notify,
gpointer data)
{
GtkWeakRef *weak;
g_return_if_fail (object != NULL);
g_return_if_fail (notify != NULL);
g_return_if_fail (GTK_IS_OBJECT (object));
if (!weakrefs_key_id)
weakrefs_key_id = g_quark_from_static_string (weakrefs_key);
weak = g_new (GtkWeakRef, 1);
weak->next = gtk_object_get_data_by_id (object, weakrefs_key_id);
weak->notify = notify;
weak->data = data;
gtk_object_set_data_by_id (object, weakrefs_key_id, weak);
}
void
gtk_object_weakunref (GtkObject *object,
GtkDestroyNotify notify,
gpointer data)
{
GtkWeakRef *weaks, *w, **wp;
g_return_if_fail (object != NULL);
g_return_if_fail (GTK_IS_OBJECT (object));
if (!weakrefs_key_id)
return;
weaks = gtk_object_get_data_by_id (object, weakrefs_key_id);
for (wp = &weaks; *wp; wp = &(*wp)->next)
{
w = *wp;
if (w->notify == notify && w->data == data)
{
if (w == weaks)
gtk_object_set_data_by_id (object, weakrefs_key_id, w->next);
else
*wp = w->next;
g_free (w);
return;
}
}
}
static void
gtk_object_notify_weaks (GtkObject *object)
{
if (weakrefs_key_id)
{
GtkWeakRef *w1, *w2;
w1 = gtk_object_get_data_by_id (object, weakrefs_key_id);
while (w1)
{
w1->notify (w1->data);
w2 = w1->next;
g_free (w1);
w1 = w2;
}
}
}
/****************************************************
* GtkObject argument mechanism and object creation
*
****************************************************/
GtkObject*
gtk_object_new (GtkType object_type,
...)
{
GtkObject *object;
va_list var_args;
GSList *arg_list = NULL;
GSList *info_list = NULL;
gchar *error;
g_return_val_if_fail (GTK_FUNDAMENTAL_TYPE (object_type) == GTK_TYPE_OBJECT, NULL);
object = gtk_type_new (object_type);
va_start (var_args, object_type);
error = gtk_object_args_collect (GTK_OBJECT_TYPE (object),
&arg_list,
&info_list,
&var_args);
va_end (var_args);
if (error)
{
g_warning ("gtk_object_new(): %s", error);
g_free (error);
}
else
{
GSList *slist_arg;
GSList *slist_info;
slist_arg = arg_list;
slist_info = info_list;
while (slist_arg)
{
gtk_object_arg_set (object, slist_arg->data, slist_info->data);
slist_arg = slist_arg->next;
slist_info = slist_info->next;
}
gtk_args_collect_cleanup (arg_list, info_list);
}
return object;
}
GtkObject*
gtk_object_newv (GtkType object_type,
guint n_args,
GtkArg *args)
{
GtkObject *object;
GtkArg *max_args;
g_return_val_if_fail (GTK_FUNDAMENTAL_TYPE (object_type) == GTK_TYPE_OBJECT, NULL);
if (n_args)
g_return_val_if_fail (args != NULL, NULL);
object = gtk_type_new (object_type);
for (max_args = args + n_args; args < max_args; args++)
gtk_object_arg_set (object, args, NULL);
return object;
}
void
gtk_object_setv (GtkObject *object,
guint n_args,
GtkArg *args)
{
GtkArg *max_args;
g_return_if_fail (object != NULL);
g_return_if_fail (GTK_IS_OBJECT (object));
if (n_args)
g_return_if_fail (args != NULL);
for (max_args = args + n_args; args < max_args; args++)
gtk_object_arg_set (object, args, NULL);
}
void
gtk_object_getv (GtkObject *object,
guint n_args,
GtkArg *args)
{
GtkArg *max_args;
g_return_if_fail (object != NULL);
g_return_if_fail (GTK_IS_OBJECT (object));
if (n_args)
g_return_if_fail (args != NULL);
for (max_args = args + n_args; args < max_args; args++)
gtk_object_arg_get (object, args, NULL);
}
void
gtk_object_set (GtkObject *object,
...)
{
va_list var_args;
GSList *arg_list = NULL;
GSList *info_list = NULL;
gchar *error;
g_return_if_fail (object != NULL);
g_return_if_fail (GTK_IS_OBJECT (object));
va_start (var_args, object);
error = gtk_object_args_collect (GTK_OBJECT_TYPE (object),
&arg_list,
&info_list,
&var_args);
va_end (var_args);
if (error)
{
g_warning ("gtk_object_set(): %s", error);
g_free (error);
}
else
{
GSList *slist_arg;
GSList *slist_info;
slist_arg = arg_list;
slist_info = info_list;
while (slist_arg)
{
gtk_object_arg_set (object, slist_arg->data, slist_info->data);
slist_arg = slist_arg->next;
slist_info = slist_info->next;
}
gtk_args_collect_cleanup (arg_list, info_list);
}
}
void
gtk_object_arg_set (GtkObject *object,
GtkArg *arg,
GtkArgInfo *info)
{
GtkObjectClass *oclass;
g_return_if_fail (object != NULL);
g_return_if_fail (GTK_IS_OBJECT (object));
g_return_if_fail (arg != NULL);
if (!info)
{
gchar *error;
error = gtk_arg_get_info (GTK_OBJECT_TYPE (object),
object_arg_info_ht,
arg->name,
&info);
if (error)
{
g_warning ("gtk_object_arg_set(): %s", error);
g_free (error);
return;
}
}
if (! (info->arg_flags & GTK_ARG_WRITABLE))
{
g_warning ("gtk_object_arg_set(): argument \"%s\" is not writable",
info->full_name);
return;
}
if (info->type != arg->type)
{
g_warning ("gtk_object_arg_set(): argument \"%s\" has invalid type `%s'",
info->full_name,
gtk_type_name (arg->type));
return;
}
oclass = gtk_type_class (info->class_type);
g_assert (oclass->set_arg != NULL);
oclass->set_arg (object, arg, info->arg_id);
}
void
gtk_object_arg_get (GtkObject *object,
GtkArg *arg,
GtkArgInfo *info)
{
GtkObjectClass *oclass;
g_return_if_fail (object != NULL);
g_return_if_fail (GTK_IS_OBJECT (object));
g_return_if_fail (arg != NULL);
if (!info)
{
gchar *error;
error = gtk_arg_get_info (GTK_OBJECT_TYPE (object),
object_arg_info_ht,
arg->name,
&info);
if (error)
{
g_warning ("gtk_object_arg_get(): %s", error);
g_free (error);
arg->type = GTK_TYPE_INVALID;
return;
}
}
if (! (info->arg_flags & GTK_ARG_READABLE))
{
g_warning ("gtk_object_arg_get(): argument \"%s\" is not readable",
info->full_name);
arg->type = GTK_TYPE_INVALID;
return;
}
oclass = gtk_type_class (info->class_type);
g_assert (oclass->get_arg != NULL);
arg->type = info->type;
oclass->get_arg (object, arg, info->arg_id);
}
void
gtk_object_add_arg_type (const char *arg_name,
GtkType arg_type,
guint arg_flags,
guint arg_id)
{
g_return_if_fail (arg_name != NULL);
g_return_if_fail (arg_type > GTK_TYPE_NONE);
g_return_if_fail (arg_id > 0);
g_return_if_fail ((arg_flags & GTK_ARG_CHILD_ARG) == 0);
if (arg_flags & GTK_ARG_CONSTRUCT)
g_return_if_fail ((arg_flags & GTK_ARG_READWRITE) == GTK_ARG_READWRITE);
else
g_return_if_fail ((arg_flags & GTK_ARG_READWRITE) != 0);
if (!object_arg_info_ht)
object_arg_info_ht = g_hash_table_new (gtk_arg_info_hash,
gtk_arg_info_equal);
gtk_arg_type_new_static (GTK_TYPE_OBJECT,
arg_name,
GTK_STRUCT_OFFSET (GtkObjectClass, n_args),
object_arg_info_ht,
arg_type,
arg_flags,
arg_id);
}
gchar*
gtk_object_args_collect (GtkType object_type,
GSList **arg_list_p,
GSList **info_list_p,
gpointer var_args_p)
{
return gtk_args_collect (object_type,
object_arg_info_ht,
arg_list_p,
info_list_p,
var_args_p);
}
gchar*
gtk_object_arg_get_info (GtkType object_type,
const gchar *arg_name,
GtkArgInfo **info_p)
{
return gtk_arg_get_info (object_type,
object_arg_info_ht,
arg_name,
info_p);
}
GtkArg*
gtk_object_query_args (GtkType class_type,
guint32 **arg_flags,
guint *n_args)
{
g_return_val_if_fail (n_args != NULL, NULL);
*n_args = 0;
g_return_val_if_fail (GTK_FUNDAMENTAL_TYPE (class_type) == GTK_TYPE_OBJECT, NULL);
return gtk_args_query (class_type, object_arg_info_ht, arg_flags, n_args);
}
/********************************************************
* GtkObject and GtkObjectClass cast checking functions
*
********************************************************/
static gchar*
gtk_object_descriptive_type_name (GtkType type)
{
gchar *name;
name = gtk_type_name (type);
if (!name)
name = "(unknown)";
return name;
}
GtkObject*
gtk_object_check_cast (GtkObject *obj,
GtkType cast_type)
{
if (!obj)
{
g_warning ("invalid cast from (NULL) pointer to `%s'",
gtk_object_descriptive_type_name (cast_type));
return obj;
}
if (!obj->klass)
{
g_warning ("invalid unclassed pointer in cast to `%s'",
gtk_object_descriptive_type_name (cast_type));
return obj;
}
if (obj->klass->type < GTK_TYPE_OBJECT)
{
g_warning ("invalid class type `%s' in cast to `%s'",
gtk_object_descriptive_type_name (obj->klass->type),
gtk_object_descriptive_type_name (cast_type));
return obj;
}
if (!gtk_type_is_a (obj->klass->type, cast_type))
{
g_warning ("invalid cast from `%s' to `%s'",
gtk_object_descriptive_type_name (obj->klass->type),
gtk_object_descriptive_type_name (cast_type));
return obj;
}
return obj;
}
GtkObjectClass*
gtk_object_check_class_cast (GtkObjectClass *klass,
GtkType cast_type)
{
if (!klass)
{
g_warning ("invalid class cast from (NULL) pointer to `%s'",
gtk_object_descriptive_type_name (cast_type));
return klass;
}
if (klass->type < GTK_TYPE_OBJECT)
{
g_warning ("invalid class type `%s' in class cast to `%s'",
gtk_object_descriptive_type_name (klass->type),
gtk_object_descriptive_type_name (cast_type));
return klass;
}
if (!gtk_type_is_a (klass->type, cast_type))
{
g_warning ("invalid class cast from `%s' to `%s'",
gtk_object_descriptive_type_name (klass->type),
gtk_object_descriptive_type_name (cast_type));
return klass;
}
return klass;
}
/*****************************************
* GtkObject object_data mechanism
*
*****************************************/
void
gtk_object_set_data_by_id (GtkObject *object,
GQuark data_id,
gpointer data)
{
g_return_if_fail (data_id > 0);
gtk_object_set_data_by_id_full (object, data_id, data, NULL);
}
void
gtk_object_set_data (GtkObject *object,
const gchar *key,
gpointer data)
{
g_return_if_fail (key != NULL);
gtk_object_set_data_by_id_full (object, gtk_object_data_force_id (key), data, NULL);
}
void
gtk_object_set_data_by_id_full (GtkObject *object,
GQuark data_id,
gpointer data,
GtkDestroyNotify destroy)
{
GtkObjectData *odata;
g_return_if_fail (object != NULL);
g_return_if_fail (GTK_IS_OBJECT (object));
g_return_if_fail (data_id > 0);
odata = object->object_data;
if (!data)
{
GtkObjectData *prev;
prev = NULL;
while (odata)
{
if (odata->id == data_id)
{
if (prev)
prev->next = odata->next;
else
object->object_data = odata->next;
GTK_OBJECT_DATA_DESTROY (odata);
return;
}
prev = odata;
odata = odata->next;
}
}
else
{
while (odata)
{
if (odata->id == data_id)
{
register GtkDestroyNotify dfunc;
register gpointer ddata;
dfunc = odata->destroy;
ddata = odata->data;
odata->destroy = destroy;
odata->data = data;
/* we need to have updated all structures prior to
* invokation of the destroy function
*/
if (dfunc)
dfunc (ddata);
return;
}
odata = odata->next;
}
if (gtk_object_data_free_list)
{
odata = gtk_object_data_free_list;
gtk_object_data_free_list = odata->next;
}
else
{
GtkObjectData *odata_block;
guint i;
odata_block = g_new0 (GtkObjectData, GTK_OBJECT_DATA_BLOCK_SIZE);
for (i = 1; i < GTK_OBJECT_DATA_BLOCK_SIZE; i++)
{
(odata_block + i)->next = gtk_object_data_free_list;
gtk_object_data_free_list = (odata_block + i);
}
odata = odata_block;
}
odata->id = data_id;
odata->data = data;
odata->destroy = destroy;
odata->next = object->object_data;
object->object_data = odata;
}
}
void
gtk_object_set_data_full (GtkObject *object,
const gchar *key,
gpointer data,
GtkDestroyNotify destroy)
{
g_return_if_fail (key != NULL);
gtk_object_set_data_by_id_full (object, gtk_object_data_force_id (key), data, destroy);
}
gpointer
gtk_object_get_data_by_id (GtkObject *object,
GQuark data_id)
{
GtkObjectData *odata;
g_return_val_if_fail (object != NULL, NULL);
g_return_val_if_fail (GTK_IS_OBJECT (object), NULL);
if (data_id)
{
odata = object->object_data;
while (odata)
{
if (odata->id == data_id)
return odata->data;
odata = odata->next;
}
}
return NULL;
}
gpointer
gtk_object_get_data (GtkObject *object,
const gchar *key)
{
guint id;
g_return_val_if_fail (key != NULL, NULL);
id = gtk_object_data_try_key (key);
if (id)
return gtk_object_get_data_by_id (object, id);
return NULL;
}
void
gtk_object_remove_data_by_id (GtkObject *object,
GQuark data_id)
{
if (data_id)
gtk_object_set_data_by_id_full (object, data_id, NULL, NULL);
}
void
gtk_object_remove_data (GtkObject *object,
const gchar *key)
{
gint id;
g_return_if_fail (key != NULL);
id = gtk_object_data_try_key (key);
if (id)
gtk_object_set_data_by_id_full (object, id, NULL, NULL);
}
void
gtk_object_set_user_data (GtkObject *object,
gpointer data)
{
if (!user_data_key_id)
user_data_key_id = g_quark_from_static_string (user_data_key);
gtk_object_set_data_by_id_full (object, user_data_key_id, data, NULL);
}
gpointer
gtk_object_get_user_data (GtkObject *object)
{
if (user_data_key_id)
return gtk_object_get_data_by_id (object, user_data_key_id);
return NULL;
}
/*******************************************
* GtkObject referencing and unreferencing
*
*******************************************/
#undef gtk_object_ref
#undef gtk_object_unref
void
gtk_object_ref (GtkObject *object)
{
g_return_if_fail (object != NULL);
g_return_if_fail (GTK_IS_OBJECT (object));
object->ref_count += 1;
}
void
gtk_object_unref (GtkObject *object)
{
g_return_if_fail (object != NULL);
g_return_if_fail (GTK_IS_OBJECT (object));
if (object->ref_count == 1)
gtk_object_destroy (object);
if (object->ref_count > 0)
object->ref_count -= 1;
if (object->ref_count == 0)
{
#ifdef G_ENABLE_DEBUG
if (gtk_debug_flags & GTK_DEBUG_OBJECTS)
{
g_assert (g_hash_table_lookup (living_objs_ht, object) == object);
g_hash_table_remove (living_objs_ht, object);
obj_count--;
}
#endif /* G_ENABLE_DEBUG */
object->klass->finalize (object);
}
}
static GtkObject *gtk_trace_object = NULL;
void
gtk_trace_referencing (GtkObject *object,
const gchar *func,
guint dummy,
guint line,
gboolean do_ref)
{
if (gtk_debug_flags & GTK_DEBUG_OBJECTS)
{
gboolean exists = TRUE;
g_return_if_fail (object != NULL);
g_return_if_fail (GTK_IS_OBJECT (object));
#ifdef G_ENABLE_DEBUG
exists = g_hash_table_lookup (living_objs_ht, object) != NULL;
#endif /* G_ENABLE_DEBUG */
if (exists &&
(object == gtk_trace_object ||
gtk_trace_object == (void*)42))
fprintf (stdout, "trace: object_%s: (%s:%p)->ref_count=%d %s (%s:%d)\n",
do_ref ? "ref" : "unref",
gtk_type_name (GTK_OBJECT_TYPE (object)),
object,
object->ref_count,
do_ref ? "+ 1" : "- 1",
func,
line);
else if (!exists)
fprintf (stdout, "trace: object_%s(%p): no such object! (%s:%d)\n",
do_ref ? "ref" : "unref",
object,
func,
line);
}
if (do_ref)
gtk_object_ref (object);
else
gtk_object_unref (object);
}
Reference in New Issue View Git Blame Copy Permalink