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/*
rdesktop: A Remote Desktop Protocol client.
Support functions for Extended Window Manager Hints,
http://www.freedesktop.org/standards/wm-spec.html
Copyright (C) Peter Astrand <peter@cendio.se> 2003
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., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include <X11/Xlib.h>
#include "rdesktop.h"
extern Display *g_display;
/*
Get window property value (32 bit format)
Returns zero on success, -1 on error
*/
static int
get_property_value(char *propname, long max_length,
unsigned long *nitems_return, unsigned char **prop_return)
{
int result;
Atom property;
Atom actual_type_return;
int actual_format_return;
unsigned long bytes_after_return;
property = XInternAtom(g_display, propname, True);
if (property == None)
{
fprintf(stderr, "Atom %s does not exist\n", propname);
return (-1);
}
result = XGetWindowProperty(g_display, DefaultRootWindow(g_display), property, 0, /* long_offset */
max_length, /* long_length */
False, /* delete */
AnyPropertyType, /* req_type */
&actual_type_return,
&actual_format_return,
nitems_return, &bytes_after_return, prop_return);
if (result != Success)
{
fprintf(stderr, "XGetWindowProperty failed\n");
return (-1);
}
if (actual_type_return == None || actual_format_return == 0)
{
fprintf(stderr, "Root window is missing property %s\n", propname);
return (-1);
}
if (bytes_after_return)
{
fprintf(stderr, "%s is too big for me\n", propname);
return (-1);
}
if (actual_format_return != 32)
{
fprintf(stderr, "%s has bad format\n", propname);
return (-1);
}
return (0);
}
/*
Get current desktop number
Returns -1 on error
*/
static int
get_current_desktop(void)
{
unsigned long nitems_return;
unsigned char *prop_return;
int current_desktop;
if (get_property_value("_NET_CURRENT_DESKTOP", 1, &nitems_return, &prop_return) < 0)
return (-1);
if (nitems_return != 1)
{
fprintf(stderr, "_NET_CURRENT_DESKTOP has bad length\n");
return (-1);
}
current_desktop = *prop_return;
XFree(prop_return);
return current_desktop;
}
/*
Get workarea geometry
Returns zero on success, -1 on error
*/
int
get_current_workarea(uint32 * x, uint32 * y, uint32 * width, uint32 * height)
{
int current_desktop;
unsigned long nitems_return;
unsigned char *prop_return;
uint32 *return_words;
const uint32 net_workarea_x_offset = 0;
const uint32 net_workarea_y_offset = 1;
const uint32 net_workarea_width_offset = 2;
const uint32 net_workarea_height_offset = 3;
const uint32 max_prop_length = 32 * 4; /* Max 32 desktops */
if (get_property_value("_NET_WORKAREA", max_prop_length, &nitems_return, &prop_return) < 0)
return (-1);
if (nitems_return % 4)
{
fprintf(stderr, "_NET_WORKAREA has odd length\n");
return (-1);
}
current_desktop = get_current_desktop();
if (current_desktop < 0)
return -1;
return_words = (uint32 *) prop_return;
*x = return_words[current_desktop * 4 + net_workarea_x_offset];
*y = return_words[current_desktop * 4 + net_workarea_y_offset];
*width = return_words[current_desktop * 4 + net_workarea_width_offset];
*height = return_words[current_desktop * 4 + net_workarea_height_offset];
XFree(prop_return);
return (0);
}
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