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/* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*-
 *
 * Copyright (C) 2007 William Jon McCann <mccann@jhu.edu>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program 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 General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
 *
 */

#include "config.h"

#include <stdlib.h>
#include <stdio.h>
#include <fcntl.h>
#include <unistd.h>
#include <string.h>

#include <glib.h>
#include <glib/gi18n.h>
#include <glib-object.h>

#include "gdm-display-store.h"
#include "gdm-display.h"

#define GDM_DISPLAY_STORE_GET_PRIVATE(o) (G_TYPE_INSTANCE_GET_PRIVATE ((o), GDM_TYPE_DISPLAY_STORE, GdmDisplayStorePrivate))

struct GdmDisplayStorePrivate
{
	GHashTable	*displays;
};

enum {
	DISPLAY_ADDED,
	DISPLAY_REMOVED,
	LAST_SIGNAL
};

static guint signals [LAST_SIGNAL] = { 0, };

static void	gdm_display_store_class_init	(GdmDisplayStoreClass *klass);
static void	gdm_display_store_init	        (GdmDisplayStore      *display_store);
static void	gdm_display_store_finalize	(GObject	      *object);

G_DEFINE_TYPE (GdmDisplayStore, gdm_display_store, G_TYPE_OBJECT)

GQuark
gdm_display_store_error_quark (void)
{
	static GQuark ret = 0;
	if (ret == 0) {
		ret = g_quark_from_static_string ("gdm_display_store_error");
	}

	return ret;
}

void
gdm_display_store_clear (GdmDisplayStore    *store)
{
	g_debug ("Clearing display store");
	g_hash_table_remove_all (store->priv->displays);
}

gboolean
gdm_display_store_remove (GdmDisplayStore    *store,
			  GdmDisplay         *display)
{
	g_warning ("Implement me");
	return FALSE;
}

void
gdm_display_store_foreach (GdmDisplayStore    *store,
			   GdmDisplayStoreFunc func,
			   gpointer            user_data)
{
	g_return_if_fail (store != NULL);
	g_return_if_fail (func != NULL);

	g_hash_table_find (store->priv->displays,
			   (GHRFunc)func,
			   user_data);
}

GdmDisplay *
gdm_display_store_find (GdmDisplayStore    *store,
			GdmDisplayStoreFunc predicate,
			gpointer            user_data)
{
	GdmDisplay *display;

	g_return_val_if_fail (store != NULL, NULL);
	g_return_val_if_fail (predicate != NULL, NULL);

	display = g_hash_table_find (store->priv->displays,
				     (GHRFunc)predicate,
				     user_data);
	return display;
}

guint
gdm_display_store_foreach_remove (GdmDisplayStore    *store,
				  GdmDisplayStoreFunc func,
				  gpointer            user_data)
{
	guint ret;

	g_return_val_if_fail (store != NULL, 0);
	g_return_val_if_fail (func != NULL, 0);

	ret = g_hash_table_foreach_remove (store->priv->displays,
					   (GHRFunc)func,
					   user_data);

	return ret;
}

void
gdm_display_store_add (GdmDisplayStore *store,
		       GdmDisplay      *display)
{
	char *id;

	g_return_if_fail (store != NULL);
	g_return_if_fail (display != NULL);

	gdm_display_get_id (display, &id, NULL);

	g_debug ("Adding display %s to store", id);

	g_hash_table_insert (store->priv->displays,
			     id,
			     g_object_ref (display));
}

static void
gdm_display_store_class_init (GdmDisplayStoreClass *klass)
{
	GObjectClass   *object_class = G_OBJECT_CLASS (klass);

	object_class->finalize = gdm_display_store_finalize;

	signals [DISPLAY_ADDED] =
		g_signal_new ("display-added",
			      G_TYPE_FROM_CLASS (object_class),
			      G_SIGNAL_RUN_LAST,
			      G_STRUCT_OFFSET (GdmDisplayStoreClass, display_added),
			      NULL,
			      NULL,
			      g_cclosure_marshal_VOID__STRING,
			      G_TYPE_NONE,
			      1, G_TYPE_STRING);
	signals [DISPLAY_REMOVED] =
		g_signal_new ("display-removed",
			      G_TYPE_FROM_CLASS (object_class),
			      G_SIGNAL_RUN_LAST,
			      G_STRUCT_OFFSET (GdmDisplayStoreClass, display_removed),
			      NULL,
			      NULL,
			      g_cclosure_marshal_VOID__STRING,
			      G_TYPE_NONE,
			      1, G_TYPE_STRING);

	g_type_class_add_private (klass, sizeof (GdmDisplayStorePrivate));
}

static void
display_unref (GdmDisplay *display)
{
	g_debug ("Unreffing display: %p", display);
	g_object_unref (display);
}

static void
gdm_display_store_init (GdmDisplayStore *store)
{

	store->priv = GDM_DISPLAY_STORE_GET_PRIVATE (store);

	store->priv->displays = g_hash_table_new_full (g_str_hash,
						       g_str_equal,
						       g_free,
						       (GDestroyNotify) display_unref);
}

static void
gdm_display_store_finalize (GObject *object)
{
	GdmDisplayStore *display_store;

	g_return_if_fail (object != NULL);
	g_return_if_fail (GDM_IS_DISPLAY_STORE (object));

	display_store = GDM_DISPLAY_STORE (object);

	g_return_if_fail (display_store->priv != NULL);

	G_OBJECT_CLASS (gdm_display_store_parent_class)->finalize (object);
}

GdmDisplayStore *
gdm_display_store_new (void)
{
        GObject *object;

        object = g_object_new (GDM_TYPE_DISPLAY_STORE,
                               NULL);

        return GDM_DISPLAY_STORE (object);
}