mirror of
https://gitlab.gnome.org/GNOME/glib.git
synced 2024-12-25 15:06:14 +01:00
229 lines
8.1 KiB
C
229 lines
8.1 KiB
C
/* GObject - GLib Type, Object, Parameter and Signal Library
|
|
* Copyright (C) 1997-1999, 2000-2001 Tim Janik and Red Hat, Inc.
|
|
*
|
|
* This library is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU Lesser 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
|
|
* Lesser General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU Lesser 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.
|
|
*
|
|
* gparam.h: GParamSpec base class implementation
|
|
*/
|
|
#if !defined (__GLIB_GOBJECT_H_INSIDE__) && !defined (GOBJECT_COMPILATION)
|
|
#error "Only <glib-object.h> can be included directly."
|
|
#endif
|
|
|
|
#ifndef __G_PARAM_H__
|
|
#define __G_PARAM_H__
|
|
|
|
#include <gobject/gvalue.h>
|
|
|
|
G_BEGIN_DECLS
|
|
|
|
/* --- standard type macros --- */
|
|
#define G_TYPE_IS_PARAM(type) (G_TYPE_FUNDAMENTAL (type) == G_TYPE_PARAM)
|
|
#define G_PARAM_SPEC(pspec) (G_TYPE_CHECK_INSTANCE_CAST ((pspec), G_TYPE_PARAM, GParamSpec))
|
|
#define G_IS_PARAM_SPEC(pspec) (G_TYPE_CHECK_INSTANCE_TYPE ((pspec), G_TYPE_PARAM))
|
|
#define G_PARAM_SPEC_CLASS(pclass) (G_TYPE_CHECK_CLASS_CAST ((pclass), G_TYPE_PARAM, GParamSpecClass))
|
|
#define G_IS_PARAM_SPEC_CLASS(pclass) (G_TYPE_CHECK_CLASS_TYPE ((pclass), G_TYPE_PARAM))
|
|
#define G_PARAM_SPEC_GET_CLASS(pspec) (G_TYPE_INSTANCE_GET_CLASS ((pspec), G_TYPE_PARAM, GParamSpecClass))
|
|
|
|
|
|
/* --- convenience macros --- */
|
|
#define G_PARAM_SPEC_TYPE(pspec) (G_TYPE_FROM_INSTANCE (pspec))
|
|
#define G_PARAM_SPEC_TYPE_NAME(pspec) (g_type_name (G_PARAM_SPEC_TYPE (pspec)))
|
|
#define G_PARAM_SPEC_VALUE_TYPE(pspec) (G_PARAM_SPEC (pspec)->value_type)
|
|
#define G_VALUE_HOLDS_PARAM(value) (G_TYPE_CHECK_VALUE_TYPE ((value), G_TYPE_PARAM))
|
|
|
|
|
|
/* --- flags --- */
|
|
typedef enum
|
|
{
|
|
G_PARAM_READABLE = 1 << 0,
|
|
G_PARAM_WRITABLE = 1 << 1,
|
|
G_PARAM_CONSTRUCT = 1 << 2,
|
|
G_PARAM_CONSTRUCT_ONLY = 1 << 3,
|
|
G_PARAM_LAX_VALIDATION = 1 << 4,
|
|
G_PARAM_PRIVATE = 1 << 5
|
|
} GParamFlags;
|
|
#define G_PARAM_READWRITE (G_PARAM_READABLE | G_PARAM_WRITABLE)
|
|
#define G_PARAM_MASK (0x000000ff)
|
|
/* bits in the range 0xffffff00 are reserved for 3rd party usage */
|
|
#define G_PARAM_USER_SHIFT (8)
|
|
|
|
|
|
/* --- typedefs & structures --- */
|
|
typedef struct _GParamSpec GParamSpec;
|
|
typedef struct _GParamSpecClass GParamSpecClass;
|
|
typedef struct _GParameter GParameter;
|
|
typedef struct _GParamSpecPool GParamSpecPool;
|
|
struct _GParamSpec
|
|
{
|
|
GTypeInstance g_type_instance;
|
|
|
|
gchar *name;
|
|
GParamFlags flags;
|
|
GType value_type;
|
|
GType owner_type; /* class or interface using this property */
|
|
|
|
/*< private >*/
|
|
gchar *_nick;
|
|
gchar *_blurb;
|
|
GData *qdata;
|
|
guint ref_count;
|
|
guint param_id; /* sort-criteria */
|
|
};
|
|
struct _GParamSpecClass
|
|
{
|
|
GTypeClass g_type_class;
|
|
|
|
GType value_type;
|
|
|
|
void (*finalize) (GParamSpec *pspec);
|
|
|
|
/* GParam methods */
|
|
void (*value_set_default) (GParamSpec *pspec,
|
|
GValue *value);
|
|
gboolean (*value_validate) (GParamSpec *pspec,
|
|
GValue *value);
|
|
gint (*values_cmp) (GParamSpec *pspec,
|
|
const GValue *value1,
|
|
const GValue *value2);
|
|
/*< private >*/
|
|
gpointer dummy[4];
|
|
};
|
|
struct _GParameter /* auxillary structure for _setv() variants */
|
|
{
|
|
const gchar *name;
|
|
GValue value;
|
|
};
|
|
|
|
|
|
/* --- prototypes --- */
|
|
GParamSpec* g_param_spec_ref (GParamSpec *pspec);
|
|
void g_param_spec_unref (GParamSpec *pspec);
|
|
void g_param_spec_sink (GParamSpec *pspec);
|
|
gpointer g_param_spec_get_qdata (GParamSpec *pspec,
|
|
GQuark quark);
|
|
void g_param_spec_set_qdata (GParamSpec *pspec,
|
|
GQuark quark,
|
|
gpointer data);
|
|
void g_param_spec_set_qdata_full (GParamSpec *pspec,
|
|
GQuark quark,
|
|
gpointer data,
|
|
GDestroyNotify destroy);
|
|
gpointer g_param_spec_steal_qdata (GParamSpec *pspec,
|
|
GQuark quark);
|
|
GParamSpec* g_param_spec_get_redirect_target (GParamSpec *pspec);
|
|
|
|
void g_param_value_set_default (GParamSpec *pspec,
|
|
GValue *value);
|
|
gboolean g_param_value_defaults (GParamSpec *pspec,
|
|
GValue *value);
|
|
gboolean g_param_value_validate (GParamSpec *pspec,
|
|
GValue *value);
|
|
gboolean g_param_value_convert (GParamSpec *pspec,
|
|
const GValue *src_value,
|
|
GValue *dest_value,
|
|
gboolean strict_validation);
|
|
gint g_param_values_cmp (GParamSpec *pspec,
|
|
const GValue *value1,
|
|
const GValue *value2);
|
|
G_CONST_RETURN gchar* g_param_spec_get_name (GParamSpec *pspec);
|
|
G_CONST_RETURN gchar* g_param_spec_get_nick (GParamSpec *pspec);
|
|
G_CONST_RETURN gchar* g_param_spec_get_blurb (GParamSpec *pspec);
|
|
void g_value_set_param (GValue *value,
|
|
GParamSpec *param);
|
|
GParamSpec* g_value_get_param (const GValue *value);
|
|
GParamSpec* g_value_dup_param (const GValue *value);
|
|
|
|
|
|
void g_value_take_param (GValue *value,
|
|
GParamSpec *param);
|
|
#ifndef G_DISABLE_DEPRECATED
|
|
void g_value_set_param_take_ownership (GValue *value,
|
|
GParamSpec *param);
|
|
#endif
|
|
|
|
/* --- convenience functions --- */
|
|
typedef struct _GParamSpecTypeInfo GParamSpecTypeInfo;
|
|
struct _GParamSpecTypeInfo
|
|
{
|
|
/* type system portion */
|
|
guint16 instance_size; /* obligatory */
|
|
guint16 n_preallocs; /* optional */
|
|
void (*instance_init) (GParamSpec *pspec); /* optional */
|
|
|
|
/* class portion */
|
|
GType value_type; /* obligatory */
|
|
void (*finalize) (GParamSpec *pspec); /* optional */
|
|
void (*value_set_default) (GParamSpec *pspec, /* recommended */
|
|
GValue *value);
|
|
gboolean (*value_validate) (GParamSpec *pspec, /* optional */
|
|
GValue *value);
|
|
gint (*values_cmp) (GParamSpec *pspec, /* recommended */
|
|
const GValue *value1,
|
|
const GValue *value2);
|
|
};
|
|
GType g_param_type_register_static (const gchar *name,
|
|
const GParamSpecTypeInfo *pspec_info);
|
|
|
|
/* For registering builting types */
|
|
GType _g_param_type_register_static_constant (const gchar *name,
|
|
const GParamSpecTypeInfo *pspec_info,
|
|
GType opt_type);
|
|
|
|
|
|
/* --- protected --- */
|
|
gpointer g_param_spec_internal (GType param_type,
|
|
const gchar *name,
|
|
const gchar *nick,
|
|
const gchar *blurb,
|
|
GParamFlags flags);
|
|
GParamSpecPool* g_param_spec_pool_new (gboolean type_prefixing);
|
|
void g_param_spec_pool_insert (GParamSpecPool *pool,
|
|
GParamSpec *pspec,
|
|
GType owner_type);
|
|
void g_param_spec_pool_remove (GParamSpecPool *pool,
|
|
GParamSpec *pspec);
|
|
GParamSpec* g_param_spec_pool_lookup (GParamSpecPool *pool,
|
|
const gchar *param_name,
|
|
GType owner_type,
|
|
gboolean walk_ancestors);
|
|
GList* g_param_spec_pool_list_owned (GParamSpecPool *pool,
|
|
GType owner_type);
|
|
GParamSpec** g_param_spec_pool_list (GParamSpecPool *pool,
|
|
GType owner_type,
|
|
guint *n_pspecs_p);
|
|
|
|
|
|
|
|
/* contracts:
|
|
*
|
|
* gboolean value_validate (GParamSpec *pspec,
|
|
* GValue *value):
|
|
* modify value contents in the least destructive way, so
|
|
* that it complies with pspec's requirements (i.e.
|
|
* according to minimum/maximum ranges etc...). return
|
|
* whether modification was necessary.
|
|
*
|
|
* gint values_cmp (GParamSpec *pspec,
|
|
* const GValue *value1,
|
|
* const GValue *value2):
|
|
* return value1 - value2, i.e. (-1) if value1 < value2,
|
|
* (+1) if value1 > value2, and (0) otherwise (equality)
|
|
*/
|
|
|
|
G_END_DECLS
|
|
|
|
#endif /* __G_PARAM_H__ */
|