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/* 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 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.
*/
/*
* Modified by the GTK+ Team and others 1997-1999. 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 <X11/Xlib.h>
#include <X11/Xatom.h>
#include <string.h>
#include "gdk.h"
#include "gdkprivate.h"
GdkAtom
gdk_atom_intern (const gchar *atom_name,
gint only_if_exists)
{
GdkAtom retval;
static GHashTable *atom_hash = NULL;
if (!atom_hash)
atom_hash = g_hash_table_new (g_str_hash, g_str_equal);
retval = GPOINTER_TO_UINT (g_hash_table_lookup (atom_hash, atom_name));
if (!retval)
{
retval = XInternAtom (gdk_display, atom_name, only_if_exists);
g_hash_table_insert (atom_hash,
g_strdup (atom_name),
GUINT_TO_POINTER (retval));
}
return retval;
}
gchar *
gdk_atom_name (GdkAtom atom)
{
gchar *t;
gchar *name;
gint old_error_warnings;
/* If this atom doesn't exist, we'll die with an X error unless
we take precautions */
old_error_warnings = gdk_error_warnings;
gdk_error_warnings = 0;
gdk_error_code = 0;
t = XGetAtomName (gdk_display, atom);
gdk_error_warnings = old_error_warnings;
if (gdk_error_code == -1)
{
if (t)
XFree (t);
return NULL;
}
else
{
name = g_strdup (t);
if (t)
XFree (t);
return name;
}
}
gint
gdk_property_get (GdkWindow *window,
GdkAtom property,
GdkAtom type,
gulong offset,
gulong length,
gint pdelete,
GdkAtom *actual_property_type,
gint *actual_format_type,
gint *actual_length,
guchar **data)
{
Display *xdisplay;
Window xwindow;
Atom ret_prop_type;
gint ret_format;
gulong ret_nitems;
gulong ret_bytes_after;
gulong ret_length;
guchar *ret_data;
if (window)
{
GdkWindowPrivate *private;
private = (GdkWindowPrivate*) window;
if (private->destroyed)
return FALSE;
xdisplay = private->xdisplay;
xwindow = private->xwindow;
}
else
{
xdisplay = gdk_display;
xwindow = gdk_root_window;
}
ret_data = NULL;
XGetWindowProperty (xdisplay, xwindow, property,
offset, (length + 3) / 4, pdelete,
type, &ret_prop_type, &ret_format,
&ret_nitems, &ret_bytes_after,
&ret_data);
if ((ret_prop_type == None) && (ret_format == 0)) {
return FALSE;
}
if (actual_property_type)
*actual_property_type = ret_prop_type;
if (actual_format_type)
*actual_format_type = ret_format;
if ((type != AnyPropertyType) && (ret_prop_type != type))
{
gchar *rn, *pn;
XFree (ret_data);
rn = gdk_atom_name(ret_prop_type);
pn = gdk_atom_name(type);
g_warning("Couldn't match property type %s to %s\n", rn, pn);
g_free(rn); g_free(pn);
return FALSE;
}
/* FIXME: ignoring bytes_after could have very bad effects */
if (data)
{
switch (ret_format)
{
case 8:
ret_length = ret_nitems;
break;
case 16:
ret_length = 2 * ret_nitems;
break;
case 32:
ret_length = 4 * ret_nitems;
break;
default:
g_warning ("unknown property return format: %d", ret_format);
XFree (ret_data);
return FALSE;
}
*data = g_new (guchar, ret_length);
memcpy (*data, ret_data, ret_length);
if (actual_length)
*actual_length = ret_length;
}
XFree (ret_data);
return TRUE;
}
void
gdk_property_change (GdkWindow *window,
GdkAtom property,
GdkAtom type,
gint format,
GdkPropMode mode,
guchar *data,
gint nelements)
{
Display *xdisplay;
Window xwindow;
if (window)
{
GdkWindowPrivate *private;
private = (GdkWindowPrivate*) window;
if (private->destroyed)
return;
xdisplay = private->xdisplay;
xwindow = private->xwindow;
}
else
{
xdisplay = gdk_display;
xwindow = gdk_root_window;
}
XChangeProperty (xdisplay, xwindow, property, type,
format, mode, data, nelements);
}
void
gdk_property_delete (GdkWindow *window,
GdkAtom property)
{
Display *xdisplay;
Window xwindow;
if (window)
{
GdkWindowPrivate *private;
private = (GdkWindowPrivate*) window;
if (private->destroyed)
return;
xdisplay = private->xdisplay;
xwindow = private->xwindow;
}
else
{
xdisplay = gdk_display;
xwindow = gdk_root_window;
}
XDeleteProperty (xdisplay, xwindow, property);
}
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