GnomeSettingsModule

[Rodrigo Moya <rodrigo gnome-db org>]

Hi

Although a bit slower than I thought, here's at last the 1st step in the
g-s-d refactoring I was talking about. This is the class to be
implemented by the modules (gnome-settings-font, gnome-settings-...), it
just provides the hooks for g-s-d to make the calls to the modules. With
this, gnome-settings-daemon.c would just need to iterate over a list
with all the objects implementing this class when making calls to their
methods (instead of: gnome_settings_font_init; gnome_settings_xrdb_init,
etc, etc).

If there's nothing against it, I'll start moving the modules to that.
One question that remains open is how to load the modules. Since the
modules are part of g-s-d itself, it makes more sense to me to include
them in the g-s-d code and just load them by hand (to a list or
something) on the g-s-d code, but, just in case, do we want to load them
from shared libs? is there any good reason to do so?
-- 
Rodrigo Moya <rodrigo gnome-db org>

/*
 * Copyright (C) 2007 The GNOME Foundation
 *
 * Permission to use, copy, modify, distribute, and sell this software and its
 * documentation for any purpose is hereby granted without fee, provided that
 * the above copyright notice appear in all copies and that both that
 * copyright notice and this permission notice appear in supporting
 * documentation, and that the name of Red Hat not be used in advertising or
 * publicity pertaining to distribution of the software without specific,
 * written prior permission.  Red Hat makes no representations about the
 * suitability of this software for any purpose.  It is provided "as is"
 * without express or implied warranty.
 *
 * RED HAT DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING ALL
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL RED HAT
 * BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
 * OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN 
 * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 *
 * Authors:  Owen Taylor, Havoc Pennington, Rodrigo Moya
 */

#include "gnome-settings-module.h"

#define CLASS(module) (GNOME_SETTINGS_MODULE_CLASS (G_OBJECT_GET_CLASS (module)))

static void
gnome_settings_module_class_init (GnomeSettingsModuleClass *klass)
{
	klass->initialize = NULL;
	klass->load = NULL;
	klass->unload = NULL;
	klass->reload_settings = NULL;
}

static void
gnome_settings_module_init (GnomeSettingsModule *module, GnomeSettingsModuleClass *klass)
{
}

GType
gnome_settings_module_get_type (void)
{
	static GType module_type = 0;
  
	if (!module_type) {
		static const GTypeInfo module_info = {
			sizeof (GnomeSettingsModuleClass),
			NULL,		/* base_init */
			NULL,		/* base_finalize */
			(GClassInitFunc) gnome_settings_module_class_init,
			NULL,		/* class_finalize */
			NULL,		/* class_data */
			sizeof (GnomeSettingsModule),
			0,		/* n_preallocs */
			(GInstanceInitFunc) gnome_settings_module_init,
		};
      
		module_type = g_type_register_static (G_TYPE_OBJECT,
						      "GnomeSettingsModule",
						      &module_info, 0);
	}
  
	return module_type;
}

gboolean
gnome_settings_module_initialize (GnomeSettingsModule *module)
{
	g_return_val_if_fail (GNOME_SETTINGS_IS_MODULE (module), FALSE);
	g_return_val_if_fail (CLASS (module)->initialize != NULL, FALSE);

	return CLASS (module)->initialize (module);
}

gboolean
gnome_settings_module_load (GnomeSettingsModule *module)
{
	g_return_val_if_fail (GNOME_SETTINGS_IS_MODULE (module), FALSE);
	g_return_val_if_fail (CLASS (module)->load != NULL, FALSE);

	return CLASS (module)->load (module);
}

gboolean
gnome_settings_module_unload (GnomeSettingsModule *module)
{
	g_return_val_if_fail (GNOME_SETTINGS_IS_MODULE (module), FALSE);
	g_return_val_if_fail (CLASS (module)->unload != NULL, FALSE);

	return CLASS (module)->unload (module);
}

gboolean
gnome_settings_module_reload_settings (GnomeSettingsModule *module)
{
	g_return_val_if_fail (GNOME_SETTINGS_IS_MODULE (module), FALSE);
	g_return_val_if_fail (CLASS (module)->reload_settings != NULL, FALSE);

	return CLASS (module)->reload_settings (module);
}

/*
 * Copyright (C) 2007 The GNOME Foundation
 *
 * Permission to use, copy, modify, distribute, and sell this software and its
 * documentation for any purpose is hereby granted without fee, provided that
 * the above copyright notice appear in all copies and that both that
 * copyright notice and this permission notice appear in supporting
 * documentation, and that the name of Red Hat not be used in advertising or
 * publicity pertaining to distribution of the software without specific,
 * written prior permission.  Red Hat makes no representations about the
 * suitability of this software for any purpose.  It is provided "as is"
 * without express or implied warranty.
 *
 * RED HAT DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING ALL
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL RED HAT
 * BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
 * OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN 
 * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 *
 * Authors:  Owen Taylor, Havoc Pennington, Rodrigo Moya
 */

#ifndef __GNOME_SETTINGS_MODULE_H__
#define __GNOME_SETTINGS_MODULE_H__

#include <glib-object.h>

G_BEGIN_DECLS

#define GNOME_SETTINGS_TYPE_MODULE         (gnome_settings_module_get_type ())
#define GNOME_SETTINGS_MODULE(o)           (G_TYPE_CHECK_INSTANCE_CAST ((o), GNOME_SETTINGS_TYPE_MODULE, GnomeSettingsModule))
#define GNOME_SETTINGS_MODULE_CLASS(k)     (G_TYPE_CHECK_CLASS_CAST ((k), GNOME_SETTINGS_TYPE_MODULE, GnomeSettingsModuleClass))
#define GNOME_SETTINGS_IS_MODULE(o)        (G_TYPE_CHECK_INSTANCE_TYPE ((o), GNOME_SETTINGS_TYPE_MODULE))
#define GNOME_SETTINGS_IS_MODULE_CLASS(k)  (G_TYPE_CHECK_CLASS_TYPE ((k), GNOME_SETTINGS_TYPE_MODULE))
#define GNOME_SETTINGS_MODULE_GET_CLASS(o) (G_TYPE_INSTANCE_GET_CLASS ((o), GNOME_SETTINGS_TYPE_MODULE, GnomeSettingsModuleClass))

typedef struct _GnomeSettingsModule      GnomeSettingsModule;
typedef struct _GnomeSettingsModuleClass GnomeSettingsModuleClass;

struct _GnomeSettingsModule {
	GObject parent;
};

struct _GnomeSettingsModuleClass {
	GObjectClass parent_class;

	/* virtual methods */
	gboolean (* initialize) (GnomeSettingsModule *module);
	gboolean (* load) (GnomeSettingsModule *module);
	gboolean (* unload) (GnomeSettingsModule *module);
	gboolean (* reload_settings) (GnomeSettingsModule *module);
};

GType    gnome_settings_module_get_type (void);

gboolean gnome_settings_module_initialize (GnomeSettingsModule *module);
gboolean gnome_settings_module_load (GnomeSettingsModule *module);
gboolean gnome_settings_module_unload (GnomeSettingsModule *module);
gboolean gnome_settings_module_reload_settings (GnomeSettingsModule *module);

G_END_DECLS

#endif