/* GDK - The GIMP Drawing Kit

 * 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 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.

 */

/*

 * Modified by the GTK+ Team and others 1997-2000.  See the AUTHORS

 * file for a list of people on the GTK+ Team.  See the ChangeLog

 * files for a list of changes.  These files are distributed with

 * GTK+ at ftp://ftp.gtk.org/pub/gtk/. 

 */

#include "config.h"

#include "gdkx.h"

#include "gdkprivate-x11.h"

#include "gdkdisplay-x11.h"

#include "gdkalias.h"

#include <stdio.h>

static guint     gdk_xid_hash  (XID *xid);

static gboolean  gdk_xid_equal (XID *a,

				XID *b);

/* The 3 high bits of XIDs are unused. We use one to mark fonts, 

 * since we must be able to skip fonts when iterating over all XIDs.

 */

#define XID_FONT_BIT (1<<31)

void

_gdk_xid_table_insert (GdkDisplay *display,

		       XID	  *xid,

		       gpointer    data)

{

  GdkDisplayX11 *display_x11;

  g_return_if_fail (xid != NULL);

  g_return_if_fail (GDK_IS_DISPLAY (display));

  display_x11 = GDK_DISPLAY_X11 (display);

  if (!display_x11->xid_ht)

    display_x11->xid_ht = g_hash_table_new ((GHashFunc) gdk_xid_hash,

					    (GEqualFunc) gdk_xid_equal);

  if (g_hash_table_lookup (display_x11->xid_ht, xid))

    g_warning ("XID collision, trouble ahead");

  g_hash_table_insert (display_x11->xid_ht, xid, data);

}

void

_gdk_xid_table_remove (GdkDisplay *display,

		       XID	   xid)

{

  GdkDisplayX11 *display_x11;

  g_return_if_fail (GDK_IS_DISPLAY (display));

  display_x11 = GDK_DISPLAY_X11 (display);

  if (display_x11->xid_ht)

    g_hash_table_remove (display_x11->xid_ht, &xid;;

}

/**

 * gdk_xid_table_lookup_for_display:

 * @display: the #GdkDisplay.

 * @xid: an X id.

 *

 * Returns the GDK object associated with the given X id.

 *

 * Return value: the associated Gdk object, which may be a #GdkPixmap,

 *     a #GdkWindow or a #GdkFont or %NULL if no object is associated

 *     with the X id.

 *

 * Since: 2.2

 *

 * Deprecated:2.24: This function will be removed in GTK+ 3.0. GTK+

 *     only stores windows in its X id table nowadays, so use

 *     gdk_x11_window_lookup_for_display() instead.

 */

gpointer

gdk_xid_table_lookup_for_display (GdkDisplay  *display,

				  XID	       xid)

{

  GdkDisplayX11 *display_x11;

  gpointer data = NULL;

  g_return_val_if_fail (GDK_IS_DISPLAY (display), NULL);

  display_x11 = GDK_DISPLAY_X11 (display);

  if (display_x11->xid_ht)

    data = g_hash_table_lookup (display_x11->xid_ht, &xid;;

  return data;

}

/**

 * gdk_xid_table_lookup:

 * @xid: an X id.

 *

 * Returns the Gdk object associated with the given X id for the default

 * display.

 *

 * Return value: the associated Gdk object, which may be a #GdkPixmap,

 *     a #GdkWindow or a #GdkFont or %NULL if no object is associated

 *     with the X id.

 *

 * Deprecated:2.24: This function will be removed in GTK+ 3.0. GTK+

 *     only stores windows in its X id table nowadays, so use

 *     gdk_x11_window_lookup_for_display() instead.

 */

gpointer

gdk_xid_table_lookup (XID xid)

{

  return gdk_xid_table_lookup_for_display (gdk_display_get_default (), xid);

}

static guint

gdk_xid_hash (XID *xid)

{

  return *xid;

}

static gboolean

gdk_xid_equal (XID *a,

	       XID *b)

{

  return ((*a & ~XID_FONT_BIT) == (*b & ~XID_FONT_BIT));

}

#define __GDK_XID_C__

#include "gdkaliasdef.c"