wmaker/src/wmspec.c

/*  wmspec.c-- support for the wm-spec Hints
 *
 *  Window Maker window manager
 *
 *  Copyright (c) 1998-2003 Alfredo K. Kojima
 *
 *  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.,
 *  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 */

/*
 * TODO
 * ----
 *
 * This file needs to be checked for all calls to XGetWindowProperty() and
 * proper checks need to be made on the returned values. Only checking for
 * return to be Success is not enough. -Dan
 */

#include "wconfig.h"

#include <X11/Xlib.h>
#include <X11/Xatom.h>
#include <X11/Xarch.h>
#include <string.h>

#include "WindowMaker.h"
#include "window.h"
#include "screen.h"
#include "workspace.h"
#include "framewin.h"
#include "actions.h"
#include "client.h"
#include "wmspec.h"
#include "icon.h"
#include "stacking.h"
#include "xinerama.h"
#include "properties.h"

#ifdef DEBUG_WMSPEC
#include <stdio.h>
#endif

/* Global variables */
extern Atom _XA_WM_DELETE_WINDOW;
extern Time LastTimestamp;
extern WPreferences wPreferences;

/* Root Window Properties */
static Atom net_supported;
static Atom net_client_list;
static Atom net_client_list_stacking;
static Atom net_number_of_desktops;
static Atom net_desktop_geometry;
static Atom net_desktop_viewport;
static Atom net_current_desktop;
static Atom net_desktop_names;
static Atom net_active_window;
static Atom net_workarea;	/* XXX: not xinerama compatible */
static Atom net_supporting_wm_check;
static Atom net_virtual_roots;	/* N/A */
static Atom net_desktop_layout;	/* XXX */
static Atom net_showing_desktop;

/* Other Root Window Messages */
static Atom net_close_window;
static Atom net_moveresize_window;	/* TODO */
static Atom net_wm_moveresize;	/* TODO */

/* Application Window Properties */
static Atom net_wm_name;
static Atom net_wm_visible_name;	/* TODO (unnecessary?) */
static Atom net_wm_icon_name;
static Atom net_wm_visible_icon_name;	/* TODO (unnecessary?) */
static Atom net_wm_desktop;
static Atom net_wm_window_type;
static Atom net_wm_window_type_desktop;
static Atom net_wm_window_type_dock;
static Atom net_wm_window_type_toolbar;
static Atom net_wm_window_type_menu;
static Atom net_wm_window_type_utility;
static Atom net_wm_window_type_splash;
static Atom net_wm_window_type_dialog;
static Atom net_wm_window_type_normal;
static Atom net_wm_state;
static Atom net_wm_state_modal;	/* XXX: what is this?!? */
static Atom net_wm_state_sticky;
static Atom net_wm_state_maximized_vert;
static Atom net_wm_state_maximized_horz;
static Atom net_wm_state_shaded;
static Atom net_wm_state_skip_taskbar;
static Atom net_wm_state_skip_pager;
static Atom net_wm_state_hidden;
static Atom net_wm_state_fullscreen;
static Atom net_wm_state_above;
static Atom net_wm_state_below;
static Atom net_wm_allowed_actions;
static Atom net_wm_action_move;
static Atom net_wm_action_resize;
static Atom net_wm_action_minimize;
static Atom net_wm_action_shade;
static Atom net_wm_action_stick;
static Atom net_wm_action_maximize_horz;
static Atom net_wm_action_maximize_vert;
static Atom net_wm_action_fullscreen;
static Atom net_wm_action_change_desktop;
static Atom net_wm_action_close;
static Atom net_wm_strut;	/* XXX: see net_workarea */
static Atom net_wm_strut_partial;	/* TODO: doesn't really fit into the current strut scheme */
static Atom net_wm_icon_geometry;	/* FIXME: should work together with net_wm_handled_icons, gnome-panel-2.2.0.1 doesn't use _NET_WM_HANDLED_ICONS, thus present situation. */
static Atom net_wm_icon;
static Atom net_wm_pid;		/* TODO */
static Atom net_wm_handled_icons;	/* FIXME: see net_wm_icon_geometry */

/* Window Manager Protocols */
static Atom net_wm_ping;	/* TODO */

static Atom utf8_string;

typedef struct {
	char *name;
	Atom *atom;
} atomitem_t;

static atomitem_t atomNames[] = {
	{"_NET_SUPPORTED", &net_supported},
	{"_NET_CLIENT_LIST", &net_client_list},
	{"_NET_CLIENT_LIST_STACKING", &net_client_list_stacking},
	{"_NET_NUMBER_OF_DESKTOPS", &net_number_of_desktops},
	{"_NET_DESKTOP_GEOMETRY", &net_desktop_geometry},
	{"_NET_DESKTOP_VIEWPORT", &net_desktop_viewport},
	{"_NET_CURRENT_DESKTOP", &net_current_desktop},
	{"_NET_DESKTOP_NAMES", &net_desktop_names},
	{"_NET_ACTIVE_WINDOW", &net_active_window},
	{"_NET_WORKAREA", &net_workarea},
	{"_NET_SUPPORTING_WM_CHECK", &net_supporting_wm_check},
	{"_NET_VIRTUAL_ROOTS", &net_virtual_roots},
	{"_NET_DESKTOP_LAYOUT", &net_desktop_layout},
	{"_NET_SHOWING_DESKTOP", &net_showing_desktop},

	{"_NET_CLOSE_WINDOW", &net_close_window},
	{"_NET_MOVERESIZE_WINDOW", &net_moveresize_window},
	{"_NET_WM_MOVERESIZE", &net_wm_moveresize},

	{"_NET_WM_NAME", &net_wm_name},
	{"_NET_WM_VISIBLE_NAME", &net_wm_visible_name},
	{"_NET_WM_ICON_NAME", &net_wm_icon_name},
	{"_NET_WM_VISIBLE_ICON_NAME", &net_wm_visible_icon_name},
	{"_NET_WM_DESKTOP", &net_wm_desktop},
	{"_NET_WM_WINDOW_TYPE", &net_wm_window_type},
	{"_NET_WM_WINDOW_TYPE_DESKTOP", &net_wm_window_type_desktop},
	{"_NET_WM_WINDOW_TYPE_DOCK", &net_wm_window_type_dock},
	{"_NET_WM_WINDOW_TYPE_TOOLBAR", &net_wm_window_type_toolbar},
	{"_NET_WM_WINDOW_TYPE_MENU", &net_wm_window_type_menu},
	{"_NET_WM_WINDOW_TYPE_UTILITY", &net_wm_window_type_utility},
	{"_NET_WM_WINDOW_TYPE_SPLASH", &net_wm_window_type_splash},
	{"_NET_WM_WINDOW_TYPE_DIALOG", &net_wm_window_type_dialog},
	{"_NET_WM_WINDOW_TYPE_NORMAL", &net_wm_window_type_normal},
	{"_NET_WM_STATE", &net_wm_state},
	{"_NET_WM_STATE_MODAL", &net_wm_state_modal},
	{"_NET_WM_STATE_STICKY", &net_wm_state_sticky},
	{"_NET_WM_STATE_MAXIMIZED_VERT", &net_wm_state_maximized_vert},
	{"_NET_WM_STATE_MAXIMIZED_HORZ", &net_wm_state_maximized_horz},
	{"_NET_WM_STATE_SHADED", &net_wm_state_shaded},
	{"_NET_WM_STATE_SKIP_TASKBAR", &net_wm_state_skip_taskbar},
	{"_NET_WM_STATE_SKIP_PAGER", &net_wm_state_skip_pager},
	{"_NET_WM_STATE_HIDDEN", &net_wm_state_hidden},
	{"_NET_WM_STATE_FULLSCREEN", &net_wm_state_fullscreen},
	{"_NET_WM_STATE_ABOVE", &net_wm_state_above},
	{"_NET_WM_STATE_BELOW", &net_wm_state_below},
	{"_NET_WM_ALLOWED_ACTIONS", &net_wm_allowed_actions},
	{"_NET_WM_ACTION_MOVE", &net_wm_action_move},
	{"_NET_WM_ACTION_RESIZE", &net_wm_action_resize},
	{"_NET_WM_ACTION_MINIMIZE", &net_wm_action_minimize},
	{"_NET_WM_ACTION_SHADE", &net_wm_action_shade},
	{"_NET_WM_ACTION_STICK", &net_wm_action_stick},
	{"_NET_WM_ACTION_MAXIMIZE_HORZ", &net_wm_action_maximize_horz},
	{"_NET_WM_ACTION_MAXIMIZE_VERT", &net_wm_action_maximize_vert},
	{"_NET_WM_ACTION_FULLSCREEN", &net_wm_action_fullscreen},
	{"_NET_WM_ACTION_CHANGE_DESKTOP", &net_wm_action_change_desktop},
	{"_NET_WM_ACTION_CLOSE", &net_wm_action_close},
	{"_NET_WM_STRUT", &net_wm_strut},
	{"_NET_WM_STRUT_PARTIAL", &net_wm_strut_partial},
	{"_NET_WM_ICON_GEOMETRY", &net_wm_icon_geometry},
	{"_NET_WM_ICON", &net_wm_icon},
	{"_NET_WM_PID", &net_wm_pid},
	{"_NET_WM_HANDLED_ICONS", &net_wm_handled_icons},

	{"_NET_WM_PING", &net_wm_ping},

	{"UTF8_STRING", &utf8_string},
};

#define atomNr (sizeof(atomNames)/sizeof(atomitem_t))

#define _NET_WM_STATE_REMOVE 0
#define _NET_WM_STATE_ADD 1
#define _NET_WM_STATE_TOGGLE 2

#define _NET_WM_MOVERESIZE_SIZE_TOPLEFT      0
#define _NET_WM_MOVERESIZE_SIZE_TOP          1
#define _NET_WM_MOVERESIZE_SIZE_TOPRIGHT     2
#define _NET_WM_MOVERESIZE_SIZE_RIGHT        3
#define _NET_WM_MOVERESIZE_SIZE_BOTTOMRIGHT  4
#define _NET_WM_MOVERESIZE_SIZE_BOTTOM       5
#define _NET_WM_MOVERESIZE_SIZE_BOTTOMLEFT   6
#define _NET_WM_MOVERESIZE_SIZE_LEFT         7
#define _NET_WM_MOVERESIZE_MOVE              8	/* movement only */
#define _NET_WM_MOVERESIZE_SIZE_KEYBOARD     9	/* size via keyboard */
#define _NET_WM_MOVERESIZE_MOVE_KEYBOARD    10	/* move via keyboard */

static void observer(void *self, WMNotification * notif);
static void wsobserver(void *self, WMNotification * notif);

static void updateClientList(WScreen * scr);
static void updateClientListStacking(WScreen * scr, WWindow *);

static void updateWorkspaceNames(WScreen * scr);
static void updateCurrentWorkspace(WScreen * scr);
static void updateWorkspaceCount(WScreen * scr);

typedef struct NetData {
	WScreen *scr;
	WReservedArea *strut;
	WWindow **show_desktop;
} NetData;

static void setSupportedHints(WScreen * scr)
{
	Atom atom[atomNr];
	int i = 0;

	/* set supported hints list */
	/* XXX: extend this !!! */

	atom[i++] = net_client_list;
	atom[i++] = net_client_list_stacking;
	atom[i++] = net_number_of_desktops;
	atom[i++] = net_desktop_geometry;
	atom[i++] = net_desktop_viewport;
	atom[i++] = net_current_desktop;
	atom[i++] = net_desktop_names;
	atom[i++] = net_active_window;
	atom[i++] = net_workarea;
	atom[i++] = net_supporting_wm_check;
	atom[i++] = net_showing_desktop;
#if 0
	atom[i++] = net_wm_moveresize;
#endif
	atom[i++] = net_wm_desktop;
	atom[i++] = net_wm_window_type;
	atom[i++] = net_wm_window_type_desktop;
	atom[i++] = net_wm_window_type_dock;
	atom[i++] = net_wm_window_type_toolbar;
	atom[i++] = net_wm_window_type_menu;
	atom[i++] = net_wm_window_type_utility;
	atom[i++] = net_wm_window_type_splash;
	atom[i++] = net_wm_window_type_dialog;
	atom[i++] = net_wm_window_type_normal;

	atom[i++] = net_wm_state;
	/*    atom[i++] = net_wm_state_modal; *//* XXX: not sure where/when to use it. */
	atom[i++] = net_wm_state_sticky;
	atom[i++] = net_wm_state_shaded;
	atom[i++] = net_wm_state_maximized_horz;
	atom[i++] = net_wm_state_maximized_vert;
	atom[i++] = net_wm_state_skip_taskbar;
	atom[i++] = net_wm_state_skip_pager;
	atom[i++] = net_wm_state_hidden;
	atom[i++] = net_wm_state_fullscreen;
	atom[i++] = net_wm_state_above;
	atom[i++] = net_wm_state_below;

	atom[i++] = net_wm_allowed_actions;
	atom[i++] = net_wm_action_move;
	atom[i++] = net_wm_action_resize;
	atom[i++] = net_wm_action_minimize;
	atom[i++] = net_wm_action_shade;
	atom[i++] = net_wm_action_stick;
	atom[i++] = net_wm_action_maximize_horz;
	atom[i++] = net_wm_action_maximize_vert;
	atom[i++] = net_wm_action_fullscreen;
	atom[i++] = net_wm_action_change_desktop;
	atom[i++] = net_wm_action_close;

	atom[i++] = net_wm_strut;
	atom[i++] = net_wm_icon_geometry;
	atom[i++] = net_wm_icon;
	atom[i++] = net_wm_handled_icons;

	atom[i++] = net_wm_name;
	atom[i++] = net_wm_icon_name;

	XChangeProperty(dpy, scr->root_win, net_supported, XA_ATOM, 32, PropModeReplace, (unsigned char *)atom, i);

	/* set supporting wm hint */
	XChangeProperty(dpy, scr->root_win, net_supporting_wm_check, XA_WINDOW, 32,
			PropModeReplace, (unsigned char *)&scr->info_window, 1);

	XChangeProperty(dpy, scr->info_window, net_supporting_wm_check, XA_WINDOW,
			32, PropModeReplace, (unsigned char *)&scr->info_window, 1);
}

void wNETWMUpdateDesktop(WScreen * scr)
{
	long *views, sizes[2];
	int count, i;

	if (scr->workspace_count == 0)
		return;

	count = scr->workspace_count * 2;
	views = wmalloc(sizeof(long) * count);
	/*memset(views, 0, sizeof(long) * count); */
	sizes[0] = scr->scr_width;
	sizes[1] = scr->scr_height;

	for (i = 0; i < scr->workspace_count; i++) {
		views[2 * i + 0] = 0;
		views[2 * i + 1] = 0;
	}

	XChangeProperty(dpy, scr->root_win, net_desktop_geometry, XA_CARDINAL, 32,
			PropModeReplace, (unsigned char *)sizes, 2);

	XChangeProperty(dpy, scr->root_win, net_desktop_viewport, XA_CARDINAL, 32,
			PropModeReplace, (unsigned char *)views, count);

	wfree(views);
}

int wNETWMGetCurrentDesktopFromHint(WScreen * scr)
{
	int count;
	unsigned char *prop;

	prop = PropGetCheckProperty(scr->root_win, net_current_desktop, XA_CARDINAL, 0, 1, &count);
	if (prop) {
		int desktop = *(long *)prop;
		XFree(prop);
		return desktop;
	}
	return -1;
}

/*
 * Find the best icon to be used by Window Maker for appicon/miniwindows.
 * Currently the algorithm is to take the image with the size closest
 * to icon_size x icon_size, but never bigger than that.
 *
 * This algorithm is very poorly implemented and needs to be redone (it can
 * easily select images with very large widths and very small heights over
 * square images, if the area of the former is closer to the desired one).
 *
 * The logic can also be changed to accept bigger images and scale them down.
 */
static unsigned long *findBestIcon(unsigned long *data, unsigned long items)
{
	int size, wanted, d;
	unsigned long i, distance;
	unsigned long *icon;

	/* better use only 75% of icon_size. For 64x64 this means 48x48
	 * This leaves room around the icon for the miniwindow title and
	 * results in better overall aesthetics -Dan */
	wanted = wPreferences.icon_size * wPreferences.icon_size;

	for (icon = NULL, distance = wanted, i = 0L; i < items - 1;) {
		size = data[i] * data[i + 1];
		if (size == 0)
			break;
		d = wanted - size;
		if (d >= 0 && d <= distance && (i + size + 2) <= items) {
			distance = d;
			icon = &data[i];
		}
		i += size + 2;
	}

	return icon;
}

static RImage *makeRImageFromARGBData(unsigned long *data)
{
	int size, width, height, i;
	RImage *image;
	unsigned char *imgdata;
	unsigned long pixel;

	width = data[0];
	height = data[1];
	size = width * height;

	if (size == 0)
		return NULL;

	image = RCreateImage(width, height, True);

	for (imgdata = image->data, i = 2; i < size + 2; i++, imgdata += 4) {
		pixel = data[i];
#if BYTE_ORDER == BIG_ENDIAN
		imgdata[2] = (pixel >> 24) & 0xff;	/* A */
		imgdata[1] = (pixel >> 16) & 0xff;	/* R */
		imgdata[0] = (pixel >> 8) & 0xff;	/* G */
		imgdata[3] = (pixel >> 0) & 0xff;	/* B */
#else				/* Little endian */
		imgdata[3] = (pixel >> 24) & 0xff;	/* A */
		imgdata[0] = (pixel >> 16) & 0xff;	/* R */
		imgdata[1] = (pixel >> 8) & 0xff;	/* G */
		imgdata[2] = (pixel >> 0) & 0xff;	/* B */
#endif				/* endianness */

	}

	return image;
}

static void updateIconImage(WScreen * scr, WWindow * wwin)
{
	unsigned long *property, *data;
	unsigned long items, rest;
	Atom type;
	int format;
	RImage *image;

	if (XGetWindowProperty(dpy, wwin->client_win, net_wm_icon, 0L, LONG_MAX,
			       False, XA_CARDINAL, &type, &format, &items, &rest,
			       (unsigned char **)&property) != Success || !property) {
		return;
	}

	if (type != XA_CARDINAL || format != 32 || items < 2) {
		XFree(property);
		return;
	}

	data = findBestIcon(property, items);
	if (!data) {
		XFree(property);
		return;
	}

	image = makeRImageFromARGBData(data);

	if (image) {
		if (wwin->net_icon_image)
			RReleaseImage(wwin->net_icon_image);
		wwin->net_icon_image = image;
	}

	XFree(property);
}

static void updateShowDesktop(WScreen * scr, Bool show)
{
	long foo;

	foo = (show == True);
	XChangeProperty(dpy, scr->root_win, net_showing_desktop, XA_CARDINAL, 32,
			PropModeReplace, (unsigned char *)&foo, 1);
}

void wNETWMShowingDesktop(WScreen * scr, Bool show)
{
	if (show && scr->netdata->show_desktop == NULL) {
		WWindow *tmp, **wins;
		int i = 0;

		wins = (WWindow **) wmalloc(sizeof(WWindow *) * (scr->window_count + 1));

		tmp = scr->focused_window;
		while (tmp) {
			if (!tmp->flags.hidden && !tmp->flags.miniaturized && !WFLAGP(tmp, skip_window_list)) {

				wins[i++] = tmp;
				tmp->flags.skip_next_animation = 1;
				tmp->flags.net_show_desktop = 1;
				wIconifyWindow(tmp);
			}

			tmp = tmp->prev;
		}
		wins[i++] = NULL;

		scr->netdata->show_desktop = wins;
		updateShowDesktop(scr, True);
	} else if (scr->netdata->show_desktop != NULL) {
		/* FIXME: get rid of workspace flashing ! */
		int ws = scr->current_workspace;
		WWindow **tmp;
		for (tmp = scr->netdata->show_desktop; *tmp; ++tmp) {
			wDeiconifyWindow(*tmp);
			(*tmp)->flags.net_show_desktop = 0;
		}
		if (ws != scr->current_workspace)
			wWorkspaceChange(scr, ws);
		wfree(scr->netdata->show_desktop);
		scr->netdata->show_desktop = NULL;
		updateShowDesktop(scr, False);
	}
}

void wNETWMInitStuff(WScreen * scr)
{
	NetData *data;
	int i;

#ifdef DEBUG_WMSPEC
	printf("wNETWMInitStuff\n");
#endif

#ifdef HAVE_XINTERNATOMS
	{
		Atom atoms[atomNr];
		char *names[atomNr];

		for (i = 0; i < atomNr; ++i) {
			names[i] = atomNames[i].name;
		}
		XInternAtoms(dpy, &names[0], atomNr, False, atoms);
		for (i = 0; i < atomNr; ++i) {
			*atomNames[i].atom = atoms[i];
		}
	}
#else
	for (i = 0; i < atomNr; i++) {
		*atomNames[i].atom = XInternAtom(dpy, atomNames[i].name, False);
	}
#endif

	data = wmalloc(sizeof(NetData));
	data->scr = scr;
	data->strut = NULL;
	data->show_desktop = NULL;

	scr->netdata = data;

	setSupportedHints(scr);

	WMAddNotificationObserver(observer, data, WMNManaged, NULL);
	WMAddNotificationObserver(observer, data, WMNUnmanaged, NULL);
	WMAddNotificationObserver(observer, data, WMNChangedWorkspace, NULL);
	WMAddNotificationObserver(observer, data, WMNChangedState, NULL);
	WMAddNotificationObserver(observer, data, WMNChangedFocus, NULL);
	WMAddNotificationObserver(observer, data, WMNChangedStacking, NULL);
	WMAddNotificationObserver(observer, data, WMNChangedName, NULL);

	WMAddNotificationObserver(wsobserver, data, WMNWorkspaceCreated, NULL);
	WMAddNotificationObserver(wsobserver, data, WMNWorkspaceDestroyed, NULL);
	WMAddNotificationObserver(wsobserver, data, WMNWorkspaceChanged, NULL);
	WMAddNotificationObserver(wsobserver, data, WMNWorkspaceNameChanged, NULL);

	updateClientList(scr);
	updateClientListStacking(scr, NULL);
	updateWorkspaceCount(scr);
	updateWorkspaceNames(scr);
	updateShowDesktop(scr, False);

	wScreenUpdateUsableArea(scr);
}

void wNETWMCleanup(WScreen * scr)
{
	int i;

	for (i = 0; i < atomNr; i++)
		XDeleteProperty(dpy, scr->root_win, *atomNames[i].atom);
}

void wNETWMUpdateActions(WWindow * wwin, Bool del)
{
	Atom action[10];	/* nr of actions atoms defined */
	int i = 0;

	if (del) {
		XDeleteProperty(dpy, wwin->client_win, net_wm_allowed_actions);
		return;
	}

	if (IS_MOVABLE(wwin))
		action[i++] = net_wm_action_move;

	if (IS_RESIZABLE(wwin))
		action[i++] = net_wm_action_resize;

	if (!WFLAGP(wwin, no_miniaturizable))
		action[i++] = net_wm_action_minimize;

	if (!WFLAGP(wwin, no_shadeable))
		action[i++] = net_wm_action_shade;

	/*    if (!WFLAGP(wwin, no_stickable)) */
	action[i++] = net_wm_action_stick;

	/*    if (!(WFLAGP(wwin, no_maximizeable) & MAX_HORIZONTAL)) */
	if (IS_RESIZABLE(wwin))
		action[i++] = net_wm_action_maximize_horz;

	/*    if (!(WFLAGP(wwin, no_maximizeable) & MAX_VERTICAL)) */
	if (IS_RESIZABLE(wwin))
		action[i++] = net_wm_action_maximize_vert;

	/*    if (!WFLAGP(wwin, no_fullscreen)) */
	action[i++] = net_wm_action_fullscreen;

	/*    if (!WFLAGP(wwin, no_change_desktop)) */
	action[i++] = net_wm_action_change_desktop;

	if (!WFLAGP(wwin, no_closable))
		action[i++] = net_wm_action_close;

	XChangeProperty(dpy, wwin->client_win, net_wm_allowed_actions,
			XA_ATOM, 32, PropModeReplace, (unsigned char *)action, i);
}

void wNETWMUpdateWorkarea(WScreen * scr, WArea usableArea)
{
	long *area;
	int count, i;

	/* XXX: not Xinerama compatible,
	   xinerama gets the largest available */

	if (!scr->netdata || scr->workspace_count == 0)
		return;

	count = scr->workspace_count * 4;
	area = wmalloc(sizeof(long) * count);
	for (i = 0; i < scr->workspace_count; i++) {
		area[4 * i + 0] = usableArea.x1;
		area[4 * i + 1] = usableArea.y1;
		area[4 * i + 2] = usableArea.x2 - usableArea.x1;
		area[4 * i + 3] = usableArea.y2 - usableArea.y1;
	}

	XChangeProperty(dpy, scr->root_win, net_workarea, XA_CARDINAL, 32,
			PropModeReplace, (unsigned char *)area, count);

	wfree(area);
}

Bool wNETWMGetUsableArea(WScreen * scr, int head, WArea * area)
{
	WReservedArea *cur;
	WMRect rect;

	if (!scr->netdata || !scr->netdata->strut)
		return False;

	area->x1 = area->y1 = area->x2 = area->y2 = 0;

	for (cur = scr->netdata->strut; cur; cur = cur->next) {
		WWindow *wwin = wWindowFor(cur->window);
		if (wWindowTouchesHead(wwin, head)) {
			if (cur->area.x1 > area->x1)
				area->x1 = cur->area.x1;
			if (cur->area.y1 > area->y1)
				area->y1 = cur->area.y1;
			if (cur->area.x2 > area->x2)
				area->x2 = cur->area.x2;
			if (cur->area.y2 > area->y2)
				area->y2 = cur->area.y2;
		}
	}

	if (area->x1 == 0 && area->x2 == 0 && area->y1 == 0 && area->y2 == 0)
		return False;

	rect = wGetRectForHead(scr, head);

	area->x1 = rect.pos.x + area->x1;
	area->x2 = rect.pos.x + rect.size.width - area->x2;
	area->y1 = rect.pos.y + area->y1;
	area->y2 = rect.pos.y + rect.size.height - area->y2;

	return True;
}

static void updateClientList(WScreen * scr)
{
	WWindow *wwin;
	Window *windows;
	int count;

	windows = (Window *) wmalloc(sizeof(Window) * (scr->window_count + 1));

	count = 0;
	wwin = scr->focused_window;
	while (wwin) {
		windows[count++] = wwin->client_win;
		wwin = wwin->prev;
	}
	XChangeProperty(dpy, scr->root_win, net_client_list, XA_WINDOW, 32,
			PropModeReplace, (unsigned char *)windows, count);

	wfree(windows);
	XFlush(dpy);
}

static void updateClientListStacking(WScreen * scr, WWindow * wwin_excl)
{
	WWindow *wwin;
	Window *client_list;
	Window *client_list_reverse;
	int client_count;
	WCoreWindow *tmp;
	WMBagIterator iter;
	int i;

	/* update client list */
	i = scr->window_count + 1;
	client_list = (Window *) wmalloc(sizeof(Window) * i);
	client_list_reverse = (Window *) wmalloc(sizeof(Window) * i);

	client_count = 0;
	WM_ETARETI_BAG(scr->stacking_list, tmp, iter) {
		while (tmp) {
			wwin = wWindowFor(tmp->window);
			/* wwin_excl is a window to exclude from the list
			   (e.g. it's now unmanaged) */
			if (wwin && (wwin != wwin_excl))
				client_list[client_count++] = wwin->client_win;
			tmp = tmp->stacking->under;
		}
	}

	for (i = 0; i < client_count; i++) {
		Window w = client_list[client_count - i - 1];
		client_list_reverse[i] = w;
	}

	XChangeProperty(dpy, scr->root_win, net_client_list_stacking, XA_WINDOW, 32,
			PropModeReplace, (unsigned char *)client_list_reverse, client_count);

	wfree(client_list);
	wfree(client_list_reverse);

	XFlush(dpy);
}

static void updateWorkspaceCount(WScreen * scr)
{				/* changeable */
	long count;

	count = scr->workspace_count;

	XChangeProperty(dpy, scr->root_win, net_number_of_desktops, XA_CARDINAL,
			32, PropModeReplace, (unsigned char *)&count, 1);
}

static void updateCurrentWorkspace(WScreen * scr)
{				/* changeable */
	long count;

	count = scr->current_workspace;

	XChangeProperty(dpy, scr->root_win, net_current_desktop, XA_CARDINAL, 32,
			PropModeReplace, (unsigned char *)&count, 1);
}

static void updateWorkspaceNames(WScreen * scr)
{
	char buf[MAX_WORKSPACES * (MAX_WORKSPACENAME_WIDTH + 1)], *pos;
	unsigned int i, len, curr_size;

	pos = buf;
	len = 0;
	for (i = 0; i < scr->workspace_count; i++) {
		curr_size = strlen(scr->workspaces[i]->name);
		strcpy(pos, scr->workspaces[i]->name);
		pos += (curr_size + 1);
		len += (curr_size + 1);
	}

	XChangeProperty(dpy, scr->root_win, net_desktop_names, utf8_string, 8,
			PropModeReplace, (unsigned char *)buf, len);
}

static void updateFocusHint(WScreen * scr, WWindow * wwin)
{				/* changeable */
	Window window;

	if (!scr->focused_window || !scr->focused_window->flags.focused)
		window = None;
	else
		window = scr->focused_window->client_win;

	XChangeProperty(dpy, scr->root_win, net_active_window, XA_WINDOW, 32,
			PropModeReplace, (unsigned char *)&window, 1);
}

static void updateWorkspaceHint(WWindow * wwin, Bool fake, Bool del)
{
	long l;

	if (del) {
		XDeleteProperty(dpy, wwin->client_win, net_wm_desktop);
	} else {
		l = ((fake || IS_OMNIPRESENT(wwin)) ? -1 : wwin->frame->workspace);
		XChangeProperty(dpy, wwin->client_win, net_wm_desktop, XA_CARDINAL,
				32, PropModeReplace, (unsigned char *)&l, 1);
	}
}

static void updateStateHint(WWindow * wwin, Bool changedWorkspace, Bool del)
{				/* changeable */
	if (del) {
		if (!wwin->flags.net_state_from_client) {
			XDeleteProperty(dpy, wwin->client_win, net_wm_state);
		}
	} else {
		Atom state[15];	/* nr of defined state atoms */
		int i = 0;

		if (changedWorkspace || (wPreferences.sticky_icons && !IS_OMNIPRESENT(wwin)))
			updateWorkspaceHint(wwin, False, False);

		if (IS_OMNIPRESENT(wwin))
			state[i++] = net_wm_state_sticky;
		if (wwin->flags.shaded)
			state[i++] = net_wm_state_shaded;
		if (wwin->flags.maximized & MAX_HORIZONTAL)
			state[i++] = net_wm_state_maximized_horz;
		if (wwin->flags.maximized & MAX_VERTICAL)
			state[i++] = net_wm_state_maximized_vert;
		if (WFLAGP(wwin, skip_window_list))
			state[i++] = net_wm_state_skip_taskbar;
		if (wwin->flags.net_skip_pager)
			state[i++] = net_wm_state_skip_pager;
		if ((wwin->flags.hidden || wwin->flags.miniaturized) && !wwin->flags.net_show_desktop) {
			state[i++] = net_wm_state_hidden;
			state[i++] = net_wm_state_skip_pager;

			if (wwin->flags.miniaturized && wPreferences.sticky_icons) {
				if (!IS_OMNIPRESENT(wwin))
					updateWorkspaceHint(wwin, True, False);
				state[i++] = net_wm_state_sticky;
			}
		}
		if (WFLAGP(wwin, sunken))
			state[i++] = net_wm_state_below;
		if (WFLAGP(wwin, floating))
			state[i++] = net_wm_state_above;
		if (wwin->flags.fullscreen)
			state[i++] = net_wm_state_fullscreen;

		XChangeProperty(dpy, wwin->client_win, net_wm_state, XA_ATOM, 32,
				PropModeReplace, (unsigned char *)state, i);
	}
}

static Bool updateStrut(WWindow * wwin, Bool adding)
{
	WScreen *scr;
	WReservedArea *area;
	Bool hasState = False;

	scr = wwin->screen_ptr;

	if (adding) {
		Atom type_ret;
		int fmt_ret;
		unsigned long nitems_ret;
		unsigned long bytes_after_ret;
		long *data = NULL;

		if (XGetWindowProperty(dpy, wwin->client_win, net_wm_strut, 0, 4, False,
				       XA_CARDINAL, &type_ret, &fmt_ret, &nitems_ret,
				       &bytes_after_ret, (unsigned char **)&data) == Success && data) {

			area = (WReservedArea *) wmalloc(sizeof(WReservedArea));
			area->area.x1 = data[0];
			area->area.x2 = data[1];
			area->area.y1 = data[2];
			area->area.y2 = data[3];

			area->window = wwin->client_win;

			area->next = scr->netdata->strut;
			scr->netdata->strut = area;

			XFree(data);
			hasState = True;
		}

	} else {
		/* deleting */
		area = scr->netdata->strut;

		if (area) {
			if (area->window == wwin->client_win) {
				scr->netdata->strut = area->next;
				wfree(area);
				hasState = True;
			} else {
				while (area->next && area->next->window != wwin->client_win)
					area = area->next;

				if (area->next) {
					WReservedArea *next;

					next = area->next->next;
					wfree(area->next);
					area->next = next;

					hasState = True;
				}
			}
		}
	}

	return hasState;
}

static int getWindowLayer(WWindow * wwin)
{
	int layer = WMNormalLevel;

	if (wwin->type == net_wm_window_type_desktop) {
		layer = WMDesktopLevel;
	} else if (wwin->type == net_wm_window_type_dock) {
		layer = WMDockLevel;
	} else if (wwin->type == net_wm_window_type_toolbar) {
		layer = WMMainMenuLevel;
	} else if (wwin->type == net_wm_window_type_menu) {
		layer = WMSubmenuLevel;
	} else if (wwin->type == net_wm_window_type_utility) {
	} else if (wwin->type == net_wm_window_type_splash) {
	} else if (wwin->type == net_wm_window_type_dialog) {
		if (wwin->transient_for) {
			WWindow *parent = wWindowFor(wwin->transient_for);
			if (parent && parent->flags.fullscreen) {
				layer = WMFullscreenLevel;
			}
		}
		/* //layer = WMPopUpLevel; // this seems a bad idea -Dan */
	} else if (wwin->type == net_wm_window_type_normal) {
	}

	if (wwin->client_flags.sunken && WMSunkenLevel < layer)
		layer = WMSunkenLevel;
	if (wwin->client_flags.floating && WMFloatingLevel > layer)
		layer = WMFloatingLevel;

	return layer;
}

static void doStateAtom(WWindow * wwin, Atom state, int set, Bool init)
{

	if (state == net_wm_state_sticky) {
		if (set == _NET_WM_STATE_TOGGLE) {
			set = !IS_OMNIPRESENT(wwin);
		}
		if (set != wwin->flags.omnipresent) {
			wWindowSetOmnipresent(wwin, set);
		}
	} else if (state == net_wm_state_shaded) {
		if (set == _NET_WM_STATE_TOGGLE) {
			set = !wwin->flags.shaded;
		}
		if (init) {
			wwin->flags.shaded = set;
		} else {
			if (set) {
				wShadeWindow(wwin);
			} else {
				wUnshadeWindow(wwin);
			}
		}
	} else if (state == net_wm_state_skip_taskbar) {
		if (set == _NET_WM_STATE_TOGGLE) {
			set = !wwin->client_flags.skip_window_list;
		}
		wwin->client_flags.skip_window_list = set;
	} else if (state == net_wm_state_skip_pager) {
		if (set == _NET_WM_STATE_TOGGLE) {
			set = !wwin->flags.net_skip_pager;
		}
		wwin->flags.net_skip_pager = set;
	} else if (state == net_wm_state_maximized_vert) {
		if (set == _NET_WM_STATE_TOGGLE) {
			set = !(wwin->flags.maximized & MAX_VERTICAL);
		}
		if (init) {
			wwin->flags.maximized |= (set ? MAX_VERTICAL : 0);
		} else {
			if (set) {
				wMaximizeWindow(wwin, wwin->flags.maximized | MAX_VERTICAL);
			} else {
				wMaximizeWindow(wwin, wwin->flags.maximized & ~MAX_VERTICAL);
			}
		}
	} else if (state == net_wm_state_maximized_horz) {
		if (set == _NET_WM_STATE_TOGGLE) {
			set = !(wwin->flags.maximized & MAX_HORIZONTAL);
		}
		if (init) {
			wwin->flags.maximized |= (set ? MAX_HORIZONTAL : 0);
		} else {
			if (set) {
				wMaximizeWindow(wwin, wwin->flags.maximized | MAX_HORIZONTAL);
			} else {
				wMaximizeWindow(wwin, wwin->flags.maximized & ~MAX_HORIZONTAL);
			}
		}
	} else if (state == net_wm_state_hidden) {
		if (set == _NET_WM_STATE_TOGGLE) {
			set = !(wwin->flags.miniaturized);
		}
		if (init) {
			wwin->flags.miniaturized = set;
		} else {
			if (set) {
				wIconifyWindow(wwin);
			} else {
				wDeiconifyWindow(wwin);
			}
		}
	} else if (state == net_wm_state_fullscreen) {
		if (set == _NET_WM_STATE_TOGGLE) {
			set = !(wwin->flags.fullscreen);
		}
		if (init) {
			wwin->flags.fullscreen = set;
		} else {
			if (set) {
				wFullscreenWindow(wwin);
			} else {
				wUnfullscreenWindow(wwin);
			}
		}
	} else if (state == net_wm_state_above) {
		if (set == _NET_WM_STATE_TOGGLE) {
			set = !(wwin->client_flags.floating);
		}
		if (init) {
			wwin->client_flags.floating = set;
		} else {
			wwin->client_flags.floating = set;
			ChangeStackingLevel(wwin->frame->core, getWindowLayer(wwin));
		}

	} else if (state == net_wm_state_below) {
		if (set == _NET_WM_STATE_TOGGLE) {
			set = !(wwin->client_flags.sunken);
		}
		if (init) {
			wwin->client_flags.sunken = set;
		} else {
			wwin->client_flags.sunken = set;
			ChangeStackingLevel(wwin->frame->core, getWindowLayer(wwin));
		}

	} else {
#ifdef DEBUG_WMSPEC
		printf("doStateAtom unknown atom %s set %d\n", XGetAtomName(dpy, state), set);
#endif
	}
}

static void removeIcon(WWindow * wwin)
{
	if (wwin->icon == NULL)
		return;
	if (wwin->flags.miniaturized && wwin->icon->mapped) {
		XUnmapWindow(dpy, wwin->icon->core->window);
		RemoveFromStackList(wwin->icon->core);
		wIconDestroy(wwin->icon);
		wwin->icon = NULL;
	}
}

static Bool handleWindowType(WWindow * wwin, Atom type, int *layer)
{
	Bool ret = True;

	if (type == net_wm_window_type_desktop) {
		wwin->client_flags.no_titlebar = 1;
		wwin->client_flags.no_resizable = 1;
		wwin->client_flags.no_miniaturizable = 1;
		wwin->client_flags.no_border = 1;
		wwin->client_flags.no_resizebar = 1;
		wwin->client_flags.no_shadeable = 1;
		wwin->client_flags.no_movable = 1;
		wwin->client_flags.omnipresent = 1;
		wwin->client_flags.skip_window_list = 1;
		wwin->client_flags.dont_move_off = 1;
		wwin->client_flags.no_appicon = 1;
		wwin->flags.net_skip_pager = 1;
		wwin->frame_x = 0;
		wwin->frame_y = 0;
	} else if (type == net_wm_window_type_dock) {
		wwin->client_flags.no_titlebar = 1;
		wwin->client_flags.no_resizable = 1;
		wwin->client_flags.no_miniaturizable = 1;
		wwin->client_flags.no_border = 1;	/* XXX: really not a single decoration. */
		wwin->client_flags.no_resizebar = 1;
		wwin->client_flags.no_shadeable = 1;
		wwin->client_flags.no_movable = 1;
		wwin->client_flags.omnipresent = 1;
		wwin->client_flags.skip_window_list = 1;
		wwin->client_flags.dont_move_off = 1;
		wwin->flags.net_skip_pager = 1;
	} else if (type == net_wm_window_type_toolbar) {
		wwin->client_flags.no_titlebar = 1;
		wwin->client_flags.no_resizable = 1;
		wwin->client_flags.no_miniaturizable = 1;
		wwin->client_flags.no_resizebar = 1;
		wwin->client_flags.no_shadeable = 1;
		wwin->client_flags.skip_window_list = 1;
		wwin->client_flags.dont_move_off = 1;
		wwin->client_flags.no_appicon = 1;
	} else if (type == net_wm_window_type_menu) {
		wwin->client_flags.no_titlebar = 1;
		wwin->client_flags.no_resizable = 1;
		wwin->client_flags.no_miniaturizable = 1;
		wwin->client_flags.no_resizebar = 1;
		wwin->client_flags.no_shadeable = 1;
		wwin->client_flags.skip_window_list = 1;
		wwin->client_flags.dont_move_off = 1;
		wwin->client_flags.no_appicon = 1;
	} else if (type == net_wm_window_type_utility) {
		wwin->client_flags.no_appicon = 1;
	} else if (type == net_wm_window_type_splash) {
		wwin->client_flags.no_titlebar = 1;
		wwin->client_flags.no_resizable = 1;
		wwin->client_flags.no_miniaturizable = 1;
		wwin->client_flags.no_resizebar = 1;
		wwin->client_flags.no_shadeable = 1;
		wwin->client_flags.no_movable = 1;
		wwin->client_flags.skip_window_list = 1;
		wwin->client_flags.dont_move_off = 1;
		wwin->client_flags.no_appicon = 1;
		wwin->flags.net_skip_pager = 1;
	} else if (type == net_wm_window_type_dialog) {
		/* These also seem a bad idea in our context -Dan
		   // wwin->client_flags.skip_window_list = 1;
		   // wwin->client_flags.no_appicon = 1;
		 */
	} else if (type == net_wm_window_type_normal) {
	} else {
		ret = False;
	}

	wwin->type = type;
	*layer = getWindowLayer(wwin);

	return ret;
}

void wNETWMPositionSplash(WWindow * wwin, int *x, int *y, int width, int height)
{
	if (wwin->type == net_wm_window_type_splash) {
		WScreen *scr = wwin->screen_ptr;
		WMRect rect = wGetRectForHead(scr, wGetHeadForPointerLocation(scr));
		*x = rect.pos.x + (rect.size.width - width) / 2;
		*y = rect.pos.y + (rect.size.height - height) / 2;
	}
}

static void updateWindowType(WWindow * wwin)
{
	Atom type_ret;
	int fmt_ret;
	unsigned long nitems_ret;
	unsigned long bytes_after_ret;
	long *data = NULL;
	int layer;
	if (XGetWindowProperty(dpy, wwin->client_win, net_wm_window_type, 0, 1,
			       False, XA_ATOM, &type_ret, &fmt_ret, &nitems_ret,
			       &bytes_after_ret, (unsigned char **)&data) == Success && data) {

		int i;
		Atom *type = (Atom *) data;
		for (i = 0; i < nitems_ret; ++i) {
			if (handleWindowType(wwin, type[i], &layer))
				break;
		}
		XFree(data);
	}

	if (wwin->frame != NULL) {
		ChangeStackingLevel(wwin->frame->core, layer);
		wwin->frame->flags.need_texture_change = 1;
		wWindowConfigureBorders(wwin);
		wFrameWindowPaint(wwin->frame);
		wNETWMUpdateActions(wwin, False);
	}
}

Bool wNETWMCheckClientHints(WWindow * wwin, int *layer, int *workspace)
{
	Atom type_ret;
	int fmt_ret;
	unsigned long nitems_ret;
	unsigned long bytes_after_ret;
	long *data = NULL;
	Bool hasState = False;
	int i;

	if (XGetWindowProperty(dpy, wwin->client_win, net_wm_desktop, 0, 1, False,
			       XA_CARDINAL, &type_ret, &fmt_ret, &nitems_ret,
			       &bytes_after_ret, (unsigned char **)&data) == Success && data) {

		long desktop = *data;
		XFree(data);

		if (desktop == -1)
			wwin->client_flags.omnipresent = 1;
		else
			*workspace = desktop;

		hasState = True;
	}

	if (XGetWindowProperty(dpy, wwin->client_win, net_wm_state, 0, 1, False,
			       XA_ATOM, &type_ret, &fmt_ret, &nitems_ret,
			       &bytes_after_ret, (unsigned char **)&data) == Success && data) {

		Atom *state = (Atom *) data;
		for (i = 0; i < nitems_ret; ++i) {
			doStateAtom(wwin, state[i], _NET_WM_STATE_ADD, True);
		}
		XFree(data);
		hasState = True;
	}

	if (XGetWindowProperty(dpy, wwin->client_win, net_wm_window_type, 0, 1, False,
			       XA_ATOM, &type_ret, &fmt_ret, &nitems_ret,
			       &bytes_after_ret, (unsigned char **)&data) == Success && data) {

		Atom *type = (Atom *) data;
		for (i = 0; i < nitems_ret; ++i) {
			if (handleWindowType(wwin, type[i], layer))
				break;
		}
		XFree(data);
		hasState = True;
	}

	wNETWMUpdateActions(wwin, False);
	updateStrut(wwin, False);
	if (updateStrut(wwin, True)) {
		hasState = True;
	}
	wScreenUpdateUsableArea(wwin->screen_ptr);

	return hasState;
}

static Bool updateNetIconInfo(WWindow * wwin)
{

	Atom type_ret;
	int fmt_ret;
	unsigned long nitems_ret;
	unsigned long bytes_after_ret;
	long *data = NULL;
	Bool hasState = False;
	Bool old_state = wwin->flags.net_handle_icon;

	if (XGetWindowProperty(dpy, wwin->client_win, net_wm_handled_icons, 0, 1, False,
			       XA_CARDINAL, &type_ret, &fmt_ret, &nitems_ret,
			       &bytes_after_ret, (unsigned char **)&data) == Success && data) {
		long handled = *data;
		wwin->flags.net_handle_icon = (handled != 0);
		XFree(data);
		hasState = True;

	} else
		wwin->flags.net_handle_icon = False;

	if (XGetWindowProperty(dpy, wwin->client_win, net_wm_icon_geometry, 0, 4, False,
			       XA_CARDINAL, &type_ret, &fmt_ret, &nitems_ret,
			       &bytes_after_ret, (unsigned char **)&data) == Success && data) {

#ifdef NETWM_PROPER
		if (wwin->flags.net_handle_icon)
#else
		wwin->flags.net_handle_icon = True;
#endif
		{
			wwin->icon_x = data[0];
			wwin->icon_y = data[1];
			wwin->icon_w = data[2];
			wwin->icon_h = data[3];
		}

		XFree(data);
		hasState = True;

	} else
		wwin->flags.net_handle_icon = False;

	if (wwin->flags.miniaturized && old_state != wwin->flags.net_handle_icon) {
		if (wwin->flags.net_handle_icon) {
			removeIcon(wwin);
		} else {
			wwin->flags.miniaturized = False;
			wwin->flags.skip_next_animation = True;
			wIconifyWindow(wwin);
		}
	}

	return hasState;
}

Bool wNETWMCheckInitialClientState(WWindow * wwin)
{
	Bool hasState = False;

#ifdef DEBUG_WMSPEC
	printf("CheckInitialClientState\n");
#endif

	wNETWMShowingDesktop(wwin->screen_ptr, False);

	hasState |= updateNetIconInfo(wwin);

	updateIconImage(wwin->screen_ptr, wwin);

	return hasState;
}

static void handleDesktopNames(XClientMessageEvent * event, WScreen * scr)
{
	unsigned long nitems_ret, bytes_after_ret;
	char *data, *names[32];
	int fmt_ret, i, n;
	Atom type_ret;

	if (XGetWindowProperty(dpy, scr->root_win, net_desktop_names, 0, 1, False,
			       utf8_string, &type_ret, &fmt_ret, &nitems_ret,
			       &bytes_after_ret, (unsigned char **)&data) != Success) {
		return;
	}

	if (data == NULL)
		return;

	if (type_ret != utf8_string || fmt_ret != 8)
		return;

	n = 0;
	names[n] = data;
	for (i = 0; i < nitems_ret; i++) {
		if (data[i] == 0) {
			n++;
			names[n] = &data[i];
		} else if (*names[n] == 0) {
			names[n] = &data[i];
			wWorkspaceRename(scr, n, names[n]);
		}
	}
}

Bool wNETWMProcessClientMessage(XClientMessageEvent * event)
{
	WScreen *scr;
	WWindow *wwin;
	Bool done = True;

#ifdef DEBUG_WMSPEC
	printf("processClientMessage type %s\n", XGetAtomName(dpy, event->message_type));
#endif

	scr = wScreenForWindow(event->window);
	if (scr) {
		/* generic client messages */
		if (event->message_type == net_current_desktop) {
			wWorkspaceChange(scr, event->data.l[0]);
		} else if (event->message_type == net_number_of_desktops) {
			long value;

			value = event->data.l[0];
			if (value > scr->workspace_count) {
				wWorkspaceMake(scr, value - scr->workspace_count);
			} else if (value < scr->workspace_count) {
				int i;
				Bool rebuild = False;

				for (i = scr->workspace_count - 1; i >= value; i--) {
					if (!wWorkspaceDelete(scr, i)) {
						rebuild = True;
						break;
					}
				}

				if (rebuild) {
					updateWorkspaceCount(scr);
				}
			}
		} else if (event->message_type == net_showing_desktop) {
			wNETWMShowingDesktop(scr, event->data.l[0]);
		} else if (event->message_type == net_desktop_names) {
			handleDesktopNames(event, scr);
		} else {
			done = False;
		}

		if (done)
			return True;
	}

	/* window specific client messages */

	wwin = wWindowFor(event->window);
	if (!wwin)
		return False;

	if (event->message_type == net_active_window) {
		/*
		 * Firefox sends aditional 'net_active_window' signals on startup if
		 * multiple tabs are open. That causes unnecessary workspace switching if
		 * those signals come from other workspaces. Therefore we also check if
		 * we should ignore these spurious focus across workspaces requests (but
		 * allow the switching if it comes from a pager).
		 */
		if (wwin->frame->workspace == wwin->screen_ptr->current_workspace
		    || !WFLAGP(wwin, dont_focus_across_wksp) || event->data.l[0] == 2) {
			wNETWMShowingDesktop(scr, False);
			wMakeWindowVisible(wwin);
		}
	} else if (event->message_type == net_close_window) {
		if (!WFLAGP(wwin, no_closable)) {
			if (wwin->protocols.DELETE_WINDOW)
				wClientSendProtocol(wwin, _XA_WM_DELETE_WINDOW, LastTimestamp);
		}
	} else if (event->message_type == net_wm_state) {
		int maximized = wwin->flags.maximized;
		long set = event->data.l[0];

#ifdef DEBUG_WMSPEC
		printf("net_wm_state set %d a1 %s a2 %s\n", set,
		       XGetAtomName(dpy, event->data.l[1]), XGetAtomName(dpy, event->data.l[2]));
#endif

		doStateAtom(wwin, (Atom) event->data.l[1], set, False);
		if (event->data.l[2])
			doStateAtom(wwin, (Atom) event->data.l[2], set, False);

		if (wwin->flags.maximized != maximized) {
			if (!wwin->flags.maximized) {
				wwin->flags.maximized = maximized;
				wUnmaximizeWindow(wwin);
			} else {
				wMaximizeWindow(wwin, wwin->flags.maximized);
			}
		}
		updateStateHint(wwin, False, False);
	} else if (event->message_type == net_wm_handled_icons || event->message_type == net_wm_icon_geometry) {
		updateNetIconInfo(wwin);
	} else if (event->message_type == net_wm_desktop) {
		long desktop = event->data.l[0];
		if (desktop == -1) {
			wWindowSetOmnipresent(wwin, True);
		} else {
			if (IS_OMNIPRESENT(wwin))
				wWindowSetOmnipresent(wwin, False);
			wWindowChangeWorkspace(wwin, desktop);
		}
	} else if (event->message_type == net_wm_icon) {
		updateIconImage(scr, wwin);
	} else {
		done = False;
	}

	return done;
}

Bool wNETWMCheckClientHintChange(WWindow * wwin, XPropertyEvent * event)
{
	Bool ret = True;

	if (event->atom == net_wm_strut) {
		updateStrut(wwin, False);
		updateStrut(wwin, True);
		wScreenUpdateUsableArea(wwin->screen_ptr);
	} else if (event->atom == net_wm_handled_icons || event->atom == net_wm_icon_geometry) {
		updateNetIconInfo(wwin);
	} else if (event->atom == net_wm_window_type) {
		updateWindowType(wwin);
	} else if (event->atom == net_wm_name) {
		char *name = wNETWMGetWindowName(wwin->client_win);
		wWindowUpdateName(wwin, name);
		if (name)
			wfree(name);
	} else if (event->atom == net_wm_icon_name) {
		if (wwin->icon) {
			char *name = wNETWMGetIconName(wwin->client_win);
			wIconChangeTitle(wwin->icon, name);
		}
	} else {
		ret = False;
	}

	return ret;
}

int wNETWMGetPidForWindow(Window window)
{
	Atom type_ret;
	int fmt_ret;
	unsigned long nitems_ret;
	unsigned long bytes_after_ret;
	long *data = NULL;
	int pid;

	if (XGetWindowProperty(dpy, window, net_wm_pid, 0, 1, False,
			       XA_CARDINAL, &type_ret, &fmt_ret, &nitems_ret,
			       &bytes_after_ret, (unsigned char **)&data) == Success && data) {

		pid = *data;
		XFree(data);
	} else {
		pid = 0;
	}

	return pid;
}

char *wNETWMGetWindowName(Window window)
{
	char *name;
	char *ret;
	int size;

	name = (char *)PropGetCheckProperty(window, net_wm_name, utf8_string, 0, 0, &size);
	if (name) {
		ret = wstrndup(name, size);
		XFree(name);
	} else
		ret = NULL;
	return ret;
}

char *wNETWMGetIconName(Window window)
{
	char *name;
	char *ret;
	int size;

	name = (char *)PropGetCheckProperty(window, net_wm_icon_name, utf8_string, 0, 0, &size);
	if (name) {
		ret = wstrndup(name, size);
		XFree(name);
	} else
		ret = NULL;
	return ret;
}

static void observer(void *self, WMNotification * notif)
{
	WWindow *wwin = (WWindow *) WMGetNotificationObject(notif);
	const char *name = WMGetNotificationName(notif);
	void *data = WMGetNotificationClientData(notif);
	NetData *ndata = (NetData *) self;

	if (strcmp(name, WMNManaged) == 0 && wwin) {
		updateClientList(wwin->screen_ptr);
		updateClientListStacking(wwin->screen_ptr, NULL);
		updateStateHint(wwin, True, False);

		updateStrut(wwin, False);
		updateStrut(wwin, True);
		wScreenUpdateUsableArea(wwin->screen_ptr);
	} else if (strcmp(name, WMNUnmanaged) == 0 && wwin) {
		updateClientList(wwin->screen_ptr);
		updateClientListStacking(wwin->screen_ptr, wwin);
		updateWorkspaceHint(wwin, False, True);
		updateStateHint(wwin, False, True);
		wNETWMUpdateActions(wwin, True);

		updateStrut(wwin, False);
		wScreenUpdateUsableArea(wwin->screen_ptr);
	} else if (strcmp(name, WMNResetStacking) == 0 && wwin) {
		updateClientListStacking(wwin->screen_ptr, NULL);
		updateStateHint(wwin, False, False);
	} else if (strcmp(name, WMNChangedStacking) == 0 && wwin) {
		updateClientListStacking(wwin->screen_ptr, NULL);
		updateStateHint(wwin, False, False);
	} else if (strcmp(name, WMNChangedFocus) == 0) {
		updateFocusHint(ndata->scr, wwin);
	} else if (strcmp(name, WMNChangedWorkspace) == 0 && wwin) {
		updateWorkspaceHint(wwin, False, False);
		updateStateHint(wwin, True, False);
	} else if (strcmp(name, WMNChangedState) == 0 && wwin) {
		updateStateHint(wwin, !strcmp(data, "omnipresent"), False);
	}
}

static void wsobserver(void *self, WMNotification * notif)
{
	WScreen *scr = (WScreen *) WMGetNotificationObject(notif);
	const char *name = WMGetNotificationName(notif);

	if (strcmp(name, WMNWorkspaceCreated) == 0) {
		updateWorkspaceCount(scr);
		updateWorkspaceNames(scr);
	} else if (strcmp(name, WMNWorkspaceDestroyed) == 0) {
		updateWorkspaceCount(scr);
		updateWorkspaceNames(scr);
	} else if (strcmp(name, WMNWorkspaceChanged) == 0) {
		updateCurrentWorkspace(scr);
	} else if (strcmp(name, WMNWorkspaceNameChanged) == 0) {
		updateWorkspaceNames(scr);
	}
}