add support for _NET_RESTACK_WINDOW
[mikachu/openbox.git] / openbox / screen.c
1 /* -*- indent-tabs-mode: nil; tab-width: 4; c-basic-offset: 4; -*-
2
3    screen.c for the Openbox window manager
4    Copyright (c) 2006        Mikael Magnusson
5    Copyright (c) 2003-2007   Dana Jansens
6
7    This program is free software; you can redistribute it and/or modify
8    it under the terms of the GNU General Public License as published by
9    the Free Software Foundation; either version 2 of the License, or
10    (at your option) any later version.
11
12    This program is distributed in the hope that it will be useful,
13    but WITHOUT ANY WARRANTY; without even the implied warranty of
14    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
15    GNU General Public License for more details.
16
17    See the COPYING file for a copy of the GNU General Public License.
18 */
19
20 #include "debug.h"
21 #include "openbox.h"
22 #include "dock.h"
23 #include "xerror.h"
24 #include "prop.h"
25 #include "grab.h"
26 #include "startupnotify.h"
27 #include "moveresize.h"
28 #include "config.h"
29 #include "screen.h"
30 #include "client.h"
31 #include "session.h"
32 #include "frame.h"
33 #include "event.h"
34 #include "focus.h"
35 #include "popup.h"
36 #include "extensions.h"
37 #include "render/render.h"
38 #include "gettext.h"
39
40 #include <X11/Xlib.h>
41 #ifdef HAVE_UNISTD_H
42 #  include <sys/types.h>
43 #  include <unistd.h>
44 #endif
45 #include <assert.h>
46
47 /*! The event mask to grab on the root window */
48 #define ROOT_EVENTMASK (StructureNotifyMask | PropertyChangeMask | \
49                         EnterWindowMask | LeaveWindowMask | \
50                         SubstructureRedirectMask | FocusChangeMask | \
51                         ButtonPressMask | ButtonReleaseMask | ButtonMotionMask)
52
53 guint    screen_num_desktops;
54 guint    screen_num_monitors;
55 guint    screen_desktop;
56 guint    screen_last_desktop;
57 Size     screen_physical_size;
58 gboolean screen_showing_desktop;
59 DesktopLayout screen_desktop_layout;
60 gchar  **screen_desktop_names;
61 Window   screen_support_win;
62 Time     screen_desktop_user_time = CurrentTime;
63
64 static Rect  **area; /* array of desktop holding array of xinerama areas */
65 static Rect  *monitor_area;
66
67 static ObPagerPopup *desktop_cycle_popup;
68
69 static gboolean replace_wm()
70 {
71     gchar *wm_sn;
72     Atom wm_sn_atom;
73     Window current_wm_sn_owner;
74     Time timestamp;
75
76     wm_sn = g_strdup_printf("WM_S%d", ob_screen);
77     wm_sn_atom = XInternAtom(ob_display, wm_sn, FALSE);
78     g_free(wm_sn);
79
80     current_wm_sn_owner = XGetSelectionOwner(ob_display, wm_sn_atom);
81     if (current_wm_sn_owner == screen_support_win)
82         current_wm_sn_owner = None;
83     if (current_wm_sn_owner) {
84         if (!ob_replace_wm) {
85             g_message(_("A window manager is already running on screen %d"),
86                       ob_screen);
87             return FALSE;
88         }
89         xerror_set_ignore(TRUE);
90         xerror_occured = FALSE;
91
92         /* We want to find out when the current selection owner dies */
93         XSelectInput(ob_display, current_wm_sn_owner, StructureNotifyMask);
94         XSync(ob_display, FALSE);
95
96         xerror_set_ignore(FALSE);
97         if (xerror_occured)
98             current_wm_sn_owner = None;
99     }
100
101     {
102         /* Generate a timestamp */
103         XEvent event;
104
105         XSelectInput(ob_display, screen_support_win, PropertyChangeMask);
106
107         XChangeProperty(ob_display, screen_support_win,
108                         prop_atoms.wm_class, prop_atoms.string,
109                         8, PropModeAppend, NULL, 0);
110         XWindowEvent(ob_display, screen_support_win,
111                      PropertyChangeMask, &event);
112
113         XSelectInput(ob_display, screen_support_win, NoEventMask);
114
115         timestamp = event.xproperty.time;
116     }
117
118     XSetSelectionOwner(ob_display, wm_sn_atom, screen_support_win,
119                        timestamp);
120
121     if (XGetSelectionOwner(ob_display, wm_sn_atom) != screen_support_win) {
122         g_message(_("Could not acquire window manager selection on screen %d"),
123                   ob_screen);
124         return FALSE;
125     }
126
127     /* Wait for old window manager to go away */
128     if (current_wm_sn_owner) {
129       XEvent event;
130       gulong wait = 0;
131       const gulong timeout = G_USEC_PER_SEC * 15; /* wait for 15s max */
132
133       while (wait < timeout) {
134           if (XCheckWindowEvent(ob_display, current_wm_sn_owner,
135                                 StructureNotifyMask, &event) &&
136               event.type == DestroyNotify)
137               break;
138           g_usleep(G_USEC_PER_SEC / 10);
139           wait += G_USEC_PER_SEC / 10;
140       }
141
142       if (wait >= timeout) {
143           g_message(_("The WM on screen %d is not exiting"), ob_screen);
144           return FALSE;
145       }
146     }
147
148     /* Send client message indicating that we are now the WM */
149     prop_message(RootWindow(ob_display, ob_screen), prop_atoms.manager,
150                  timestamp, wm_sn_atom, screen_support_win, 0,
151                  SubstructureNotifyMask);
152
153     return TRUE;
154 }
155
156 gboolean screen_annex(const gchar *program_name)
157 {
158     XSetWindowAttributes attrib;
159     pid_t pid;
160     gint i, num_support;
161     Atom *prop_atoms_start, *wm_supported_pos;
162     gulong *supported;
163
164     /* create the netwm support window */
165     attrib.override_redirect = TRUE;
166     screen_support_win = XCreateWindow(ob_display,
167                                        RootWindow(ob_display, ob_screen),
168                                        -100, -100, 1, 1, 0,
169                                        CopyFromParent, InputOutput,
170                                        CopyFromParent,
171                                        CWOverrideRedirect, &attrib);
172     XMapWindow(ob_display, screen_support_win);
173     XLowerWindow(ob_display, screen_support_win);
174
175     if (!replace_wm()) {
176         XDestroyWindow(ob_display, screen_support_win);
177         return FALSE;
178     }
179
180     xerror_set_ignore(TRUE);
181     xerror_occured = FALSE;
182     XSelectInput(ob_display, RootWindow(ob_display, ob_screen),
183                  ROOT_EVENTMASK);
184     xerror_set_ignore(FALSE);
185     if (xerror_occured) {
186         g_message(_("A window manager is already running on screen %d"),
187                   ob_screen);
188
189         XDestroyWindow(ob_display, screen_support_win);
190         return FALSE;
191     }
192
193
194     screen_set_root_cursor();
195
196     /* set the OPENBOX_PID hint */
197     pid = getpid();
198     PROP_SET32(RootWindow(ob_display, ob_screen),
199                openbox_pid, cardinal, pid);
200
201     /* set supporting window */
202     PROP_SET32(RootWindow(ob_display, ob_screen),
203                net_supporting_wm_check, window, screen_support_win);
204
205     /* set properties on the supporting window */
206     PROP_SETS(screen_support_win, net_wm_name, program_name);
207     PROP_SET32(screen_support_win, net_supporting_wm_check,
208                window, screen_support_win);
209
210     /* set the _NET_SUPPORTED_ATOMS hint */
211
212     /* this is all the atoms after net_supported in the prop_atoms struct */
213     prop_atoms_start = (Atom*)&prop_atoms;
214     wm_supported_pos = (Atom*)&(prop_atoms.net_supported);
215     num_support = sizeof(prop_atoms) / sizeof(Atom) -
216         (wm_supported_pos - prop_atoms_start) - 1;
217     i = 0;
218     supported = g_new(gulong, num_support);
219     supported[i++] = prop_atoms.net_supporting_wm_check;
220     supported[i++] = prop_atoms.net_wm_full_placement;
221     supported[i++] = prop_atoms.net_current_desktop;
222     supported[i++] = prop_atoms.net_number_of_desktops;
223     supported[i++] = prop_atoms.net_desktop_geometry;
224     supported[i++] = prop_atoms.net_desktop_viewport;
225     supported[i++] = prop_atoms.net_active_window;
226     supported[i++] = prop_atoms.net_workarea;
227     supported[i++] = prop_atoms.net_client_list;
228     supported[i++] = prop_atoms.net_client_list_stacking;
229     supported[i++] = prop_atoms.net_desktop_names;
230     supported[i++] = prop_atoms.net_close_window;
231     supported[i++] = prop_atoms.net_desktop_layout;
232     supported[i++] = prop_atoms.net_showing_desktop;
233     supported[i++] = prop_atoms.net_wm_name;
234     supported[i++] = prop_atoms.net_wm_visible_name;
235     supported[i++] = prop_atoms.net_wm_icon_name;
236     supported[i++] = prop_atoms.net_wm_visible_icon_name;
237     supported[i++] = prop_atoms.net_wm_desktop;
238     supported[i++] = prop_atoms.net_wm_strut;
239     supported[i++] = prop_atoms.net_wm_strut_partial;
240     supported[i++] = prop_atoms.net_wm_icon;
241     supported[i++] = prop_atoms.net_wm_icon_geometry;
242     supported[i++] = prop_atoms.net_wm_window_type;
243     supported[i++] = prop_atoms.net_wm_window_type_desktop;
244     supported[i++] = prop_atoms.net_wm_window_type_dock;
245     supported[i++] = prop_atoms.net_wm_window_type_toolbar;
246     supported[i++] = prop_atoms.net_wm_window_type_menu;
247     supported[i++] = prop_atoms.net_wm_window_type_utility;
248     supported[i++] = prop_atoms.net_wm_window_type_splash;
249     supported[i++] = prop_atoms.net_wm_window_type_dialog;
250     supported[i++] = prop_atoms.net_wm_window_type_normal;
251     supported[i++] = prop_atoms.net_wm_allowed_actions;
252     supported[i++] = prop_atoms.net_wm_action_move;
253     supported[i++] = prop_atoms.net_wm_action_resize;
254     supported[i++] = prop_atoms.net_wm_action_minimize;
255     supported[i++] = prop_atoms.net_wm_action_shade;
256     supported[i++] = prop_atoms.net_wm_action_maximize_horz;
257     supported[i++] = prop_atoms.net_wm_action_maximize_vert;
258     supported[i++] = prop_atoms.net_wm_action_fullscreen;
259     supported[i++] = prop_atoms.net_wm_action_change_desktop;
260     supported[i++] = prop_atoms.net_wm_action_close;
261     supported[i++] = prop_atoms.net_wm_state;
262     supported[i++] = prop_atoms.net_wm_state_modal;
263     supported[i++] = prop_atoms.net_wm_state_maximized_vert;
264     supported[i++] = prop_atoms.net_wm_state_maximized_horz;
265     supported[i++] = prop_atoms.net_wm_state_shaded;
266     supported[i++] = prop_atoms.net_wm_state_skip_taskbar;
267     supported[i++] = prop_atoms.net_wm_state_skip_pager;
268     supported[i++] = prop_atoms.net_wm_state_hidden;
269     supported[i++] = prop_atoms.net_wm_state_fullscreen;
270     supported[i++] = prop_atoms.net_wm_state_above;
271     supported[i++] = prop_atoms.net_wm_state_below;
272     supported[i++] = prop_atoms.net_wm_state_demands_attention;
273     supported[i++] = prop_atoms.net_moveresize_window;
274     supported[i++] = prop_atoms.net_wm_moveresize;
275     supported[i++] = prop_atoms.net_wm_user_time;
276     supported[i++] = prop_atoms.net_wm_user_time_window;
277     supported[i++] = prop_atoms.net_frame_extents;
278     supported[i++] = prop_atoms.net_request_frame_extents;
279     supported[i++] = prop_atoms.net_restack_window;
280     supported[i++] = prop_atoms.net_startup_id;
281 #ifdef SYNC
282     supported[i++] = prop_atoms.net_wm_sync_request;
283     supported[i++] = prop_atoms.net_wm_sync_request_counter;
284 #endif
285
286     supported[i++] = prop_atoms.kde_wm_change_state;
287     supported[i++] = prop_atoms.kde_net_wm_frame_strut;
288     supported[i++] = prop_atoms.kde_net_wm_window_type_override;
289
290     supported[i++] = prop_atoms.openbox_wm_state_undecorated;
291     supported[i++] = prop_atoms.openbox_pid;
292     supported[i++] = prop_atoms.openbox_config;
293     supported[i++] = prop_atoms.openbox_control;
294     g_assert(i == num_support);
295
296     PROP_SETA32(RootWindow(ob_display, ob_screen),
297                 net_supported, atom, supported, num_support);
298     g_free(supported);
299
300     return TRUE;
301 }
302
303 void screen_startup(gboolean reconfig)
304 {
305     guint i, numnames;
306     gchar **names;
307     GSList *it;
308     guint32 d;
309
310     desktop_cycle_popup = pager_popup_new(FALSE);
311     pager_popup_height(desktop_cycle_popup, POPUP_HEIGHT);
312
313     if (reconfig)
314         return;
315
316     /* get the initial size */
317     screen_resize();
318
319     /* get the desktop names */
320     numnames = g_slist_length(config_desktops_names);
321     names = g_new(gchar*, numnames + 1);
322     names[numnames] = NULL;
323     for (i = 0, it = config_desktops_names; it; ++i, it = g_slist_next(it))
324         names[i] = g_strdup(it->data);
325
326     /* set the root window property */
327     PROP_SETSS(RootWindow(ob_display, ob_screen), net_desktop_names,names);
328
329     g_strfreev(names);
330
331     /* set the number of desktops */
332     screen_num_desktops = 0;
333     screen_set_num_desktops(config_desktops_num);
334
335     /* start on the current desktop when a wm was already running */
336     if (PROP_GET32(RootWindow(ob_display, ob_screen),
337                    net_current_desktop, cardinal, &d) &&
338         d < screen_num_desktops)
339     {
340         screen_set_desktop(d, FALSE);
341     } else if (session_desktop >= 0)
342         screen_set_desktop(MIN((guint)session_desktop,
343                                screen_num_desktops), FALSE);
344     else
345         screen_set_desktop(MIN(config_screen_firstdesk,
346                                screen_num_desktops) - 1, FALSE);
347
348     /* don't start in showing-desktop mode */
349     screen_showing_desktop = FALSE;
350     PROP_SET32(RootWindow(ob_display, ob_screen),
351                net_showing_desktop, cardinal, screen_showing_desktop);
352
353     screen_update_layout();
354 }
355
356 void screen_shutdown(gboolean reconfig)
357 {
358     Rect **r;
359
360     pager_popup_free(desktop_cycle_popup);
361
362     if (reconfig)
363         return;
364
365     XSelectInput(ob_display, RootWindow(ob_display, ob_screen),
366                  NoEventMask);
367
368     /* we're not running here no more! */
369     PROP_ERASE(RootWindow(ob_display, ob_screen), openbox_pid);
370     /* not without us */
371     PROP_ERASE(RootWindow(ob_display, ob_screen), net_supported);
372     /* don't keep this mode */
373     PROP_ERASE(RootWindow(ob_display, ob_screen), net_showing_desktop);
374
375     XDestroyWindow(ob_display, screen_support_win);
376
377     g_strfreev(screen_desktop_names);
378     screen_desktop_names = NULL;
379
380     for (r = area; *r; ++r)
381         g_free(*r);
382     g_free(area);
383     area = NULL;
384 }
385
386 void screen_resize()
387 {
388     static gint oldw = 0, oldh = 0;
389     gint w, h;
390     GList *it;
391     gulong geometry[2];
392
393     w = WidthOfScreen(ScreenOfDisplay(ob_display, ob_screen));
394     h = HeightOfScreen(ScreenOfDisplay(ob_display, ob_screen));
395
396     if (w == oldw && h == oldh) return;
397
398     oldw = w; oldh = h;
399
400     /* Set the _NET_DESKTOP_GEOMETRY hint */
401     screen_physical_size.width = geometry[0] = w;
402     screen_physical_size.height = geometry[1] = h;
403     PROP_SETA32(RootWindow(ob_display, ob_screen),
404                 net_desktop_geometry, cardinal, geometry, 2);
405
406     if (ob_state() == OB_STATE_STARTING)
407         return;
408
409     screen_update_areas();
410     dock_configure();
411
412     for (it = client_list; it; it = g_list_next(it))
413         client_move_onscreen(it->data, FALSE);
414 }
415
416 void screen_set_num_desktops(guint num)
417 {
418     guint old;
419     gulong *viewport;
420     GList *it;
421
422     g_assert(num > 0);
423
424     if (screen_num_desktops == num) return;
425
426     old = screen_num_desktops;
427     screen_num_desktops = num;
428     PROP_SET32(RootWindow(ob_display, ob_screen),
429                net_number_of_desktops, cardinal, num);
430
431     /* set the viewport hint */
432     viewport = g_new0(gulong, num * 2);
433     PROP_SETA32(RootWindow(ob_display, ob_screen),
434                 net_desktop_viewport, cardinal, viewport, num * 2);
435     g_free(viewport);
436
437     /* the number of rows/columns will differ */
438     screen_update_layout();
439
440     /* move windows on desktops that will no longer exist! */
441     for (it = client_list; it; it = g_list_next(it)) {
442         ObClient *c = it->data;
443         if (c->desktop >= num && c->desktop != DESKTOP_ALL)
444             client_set_desktop(c, num - 1, FALSE);
445     }
446  
447     /* change our struts/area to match (after moving windows) */
448     screen_update_areas();
449
450     /* may be some unnamed desktops that we need to fill in with names
451      (after updating the areas so the popup can resize) */
452     screen_update_desktop_names();
453
454     /* change our desktop if we're on one that no longer exists! */
455     if (screen_desktop >= screen_num_desktops)
456         screen_set_desktop(num - 1, TRUE);
457 }
458
459 void screen_set_desktop(guint num, gboolean dofocus)
460 {
461     ObClient *c;
462     GList *it;
463     guint old;
464      
465     g_assert(num < screen_num_desktops);
466
467     old = screen_desktop;
468     screen_desktop = num;
469     PROP_SET32(RootWindow(ob_display, ob_screen),
470                net_current_desktop, cardinal, num);
471
472     if (old == num) return;
473
474     screen_last_desktop = old;
475
476     ob_debug("Moving to desktop %d\n", num+1);
477
478     if (moveresize_client)
479         client_set_desktop(moveresize_client, num, TRUE);
480
481     /* show windows before hiding the rest to lessen the enter/leave events */
482
483     /* show windows from top to bottom */
484     for (it = stacking_list; it; it = g_list_next(it)) {
485         if (WINDOW_IS_CLIENT(it->data)) {
486             ObClient *c = it->data;
487             client_show(c);
488         }
489     }
490
491     /* have to try focus here because when you leave an empty desktop
492        there is no focus out to watch for
493
494        do this before hiding the windows so if helper windows are coming
495        with us, they don't get hidden
496     */
497     if (dofocus && (c = focus_fallback_target(TRUE, focus_client))) {
498         /* only do the flicker reducing stuff ahead of time if we are going
499            to call xsetinputfocus on the window ourselves. otherwise there is
500            no guarantee the window will actually take focus.. */
501         if (c->can_focus) {
502             /* do this here so that if you switch desktops to a window with
503                helper windows then the helper windows won't flash */
504             client_bring_helper_windows(c);
505             /* reduce flicker by hiliting now rather than waiting for the
506                server FocusIn event */
507             frame_adjust_focus(c->frame, TRUE);
508         }
509         client_focus(c);
510     }
511
512     /* hide windows from bottom to top */
513     for (it = g_list_last(stacking_list); it; it = g_list_previous(it)) {
514         if (WINDOW_IS_CLIENT(it->data)) {
515             ObClient *c = it->data;
516             client_hide(c);
517         }
518     }
519
520     event_ignore_queued_enters();
521
522     if (event_curtime != CurrentTime)
523         screen_desktop_user_time = event_curtime;
524 }
525
526 static void get_row_col(guint d, guint *r, guint *c)
527 {
528     switch (screen_desktop_layout.orientation) {
529     case OB_ORIENTATION_HORZ:
530         switch (screen_desktop_layout.start_corner) {
531         case OB_CORNER_TOPLEFT:
532             *r = d / screen_desktop_layout.columns;
533             *c = d % screen_desktop_layout.columns;
534             break;
535         case OB_CORNER_BOTTOMLEFT:
536             *r = screen_desktop_layout.rows - 1 -
537                 d / screen_desktop_layout.columns;
538             *c = d % screen_desktop_layout.columns;
539             break;
540         case OB_CORNER_TOPRIGHT:
541             *r = d / screen_desktop_layout.columns;
542             *c = screen_desktop_layout.columns - 1 -
543                 d % screen_desktop_layout.columns;
544             break;
545         case OB_CORNER_BOTTOMRIGHT:
546             *r = screen_desktop_layout.rows - 1 -
547                 d / screen_desktop_layout.columns;
548             *c = screen_desktop_layout.columns - 1 -
549                 d % screen_desktop_layout.columns;
550             break;
551         }
552         break;
553     case OB_ORIENTATION_VERT:
554         switch (screen_desktop_layout.start_corner) {
555         case OB_CORNER_TOPLEFT:
556             *r = d % screen_desktop_layout.rows;
557             *c = d / screen_desktop_layout.rows;
558             break;
559         case OB_CORNER_BOTTOMLEFT:
560             *r = screen_desktop_layout.rows - 1 -
561                 d % screen_desktop_layout.rows;
562             *c = d / screen_desktop_layout.rows;
563             break;
564         case OB_CORNER_TOPRIGHT:
565             *r = d % screen_desktop_layout.rows;
566             *c = screen_desktop_layout.columns - 1 -
567                 d / screen_desktop_layout.rows;
568             break;
569         case OB_CORNER_BOTTOMRIGHT:
570             *r = screen_desktop_layout.rows - 1 -
571                 d % screen_desktop_layout.rows;
572             *c = screen_desktop_layout.columns - 1 -
573                 d / screen_desktop_layout.rows;
574             break;
575         }
576         break;
577     }
578 }
579
580 static guint translate_row_col(guint r, guint c)
581 {
582     switch (screen_desktop_layout.orientation) {
583     case OB_ORIENTATION_HORZ:
584         switch (screen_desktop_layout.start_corner) {
585         case OB_CORNER_TOPLEFT:
586             return r % screen_desktop_layout.rows *
587                 screen_desktop_layout.columns +
588                 c % screen_desktop_layout.columns;
589         case OB_CORNER_BOTTOMLEFT:
590             return (screen_desktop_layout.rows - 1 -
591                     r % screen_desktop_layout.rows) *
592                 screen_desktop_layout.columns +
593                 c % screen_desktop_layout.columns;
594         case OB_CORNER_TOPRIGHT:
595             return r % screen_desktop_layout.rows *
596                 screen_desktop_layout.columns +
597                 (screen_desktop_layout.columns - 1 -
598                  c % screen_desktop_layout.columns);
599         case OB_CORNER_BOTTOMRIGHT:
600             return (screen_desktop_layout.rows - 1 -
601                     r % screen_desktop_layout.rows) *
602                 screen_desktop_layout.columns +
603                 (screen_desktop_layout.columns - 1 -
604                  c % screen_desktop_layout.columns);
605         }
606     case OB_ORIENTATION_VERT:
607         switch (screen_desktop_layout.start_corner) {
608         case OB_CORNER_TOPLEFT:
609             return c % screen_desktop_layout.columns *
610                 screen_desktop_layout.rows +
611                 r % screen_desktop_layout.rows;
612         case OB_CORNER_BOTTOMLEFT:
613             return c % screen_desktop_layout.columns *
614                 screen_desktop_layout.rows +
615                 (screen_desktop_layout.rows - 1 -
616                  r % screen_desktop_layout.rows);
617         case OB_CORNER_TOPRIGHT:
618             return (screen_desktop_layout.columns - 1 -
619                     c % screen_desktop_layout.columns) *
620                 screen_desktop_layout.rows +
621                 r % screen_desktop_layout.rows;
622         case OB_CORNER_BOTTOMRIGHT:
623             return (screen_desktop_layout.columns - 1 -
624                     c % screen_desktop_layout.columns) *
625                 screen_desktop_layout.rows +
626                 (screen_desktop_layout.rows - 1 -
627                  r % screen_desktop_layout.rows);
628         }
629     }
630     g_assert_not_reached();
631     return 0;
632 }
633
634 void screen_desktop_popup(guint d, gboolean show)
635 {
636     Rect *a;
637
638     if (!show) {
639         pager_popup_hide(desktop_cycle_popup);
640     } else {
641         a = screen_physical_area_monitor(0);
642         pager_popup_position(desktop_cycle_popup, CenterGravity,
643                              a->x + a->width / 2, a->y + a->height / 2);
644         pager_popup_max_width(desktop_cycle_popup,
645                               MAX(a->width/3, POPUP_WIDTH));
646         pager_popup_show(desktop_cycle_popup, screen_desktop_names[d], d);
647     }
648 }
649
650 guint screen_cycle_desktop(ObDirection dir, gboolean wrap, gboolean linear,
651                            gboolean dialog, gboolean done, gboolean cancel)
652 {
653     guint d, r, c;
654
655     d = screen_desktop;
656
657     if ((cancel || done) && dialog)
658         goto show_cycle_dialog;
659
660     get_row_col(d, &r, &c);
661
662     if (linear) {
663         switch (dir) {
664         case OB_DIRECTION_EAST:
665             if (d < screen_num_desktops - 1)
666                 ++d;
667             else if (wrap)
668                 d = 0;
669             break;
670         case OB_DIRECTION_WEST:
671             if (d > 0)
672                 --d;
673             else if (wrap)
674                 d = screen_num_desktops - 1;
675             break;
676         default:
677             assert(0);
678             return screen_desktop;
679         }
680     } else {
681         switch (dir) {
682         case OB_DIRECTION_EAST:
683             ++c;
684             if (c >= screen_desktop_layout.columns) {
685                 if (wrap) {
686                     c = 0;
687                 } else {
688                     d = screen_desktop;
689                     goto show_cycle_dialog;
690                 }
691             }
692             d = translate_row_col(r, c);
693             if (d >= screen_num_desktops) {
694                 if (wrap) {
695                     ++c;
696                 } else {
697                     d = screen_desktop;
698                     goto show_cycle_dialog;
699                 }
700             }
701             break;
702         case OB_DIRECTION_WEST:
703             --c;
704             if (c >= screen_desktop_layout.columns) {
705                 if (wrap) {
706                     c = screen_desktop_layout.columns - 1;
707                 } else {
708                     d = screen_desktop;
709                     goto show_cycle_dialog;
710                 }
711             }
712             d = translate_row_col(r, c);
713             if (d >= screen_num_desktops) {
714                 if (wrap) {
715                     --c;
716                 } else {
717                     d = screen_desktop;
718                     goto show_cycle_dialog;
719                 }
720             }
721             break;
722         case OB_DIRECTION_SOUTH:
723             ++r;
724             if (r >= screen_desktop_layout.rows) {
725                 if (wrap) {
726                     r = 0;
727                 } else {
728                     d = screen_desktop;
729                     goto show_cycle_dialog;
730                 }
731             }
732             d = translate_row_col(r, c);
733             if (d >= screen_num_desktops) {
734                 if (wrap) {
735                     ++r;
736                 } else {
737                     d = screen_desktop;
738                     goto show_cycle_dialog;
739                 }
740             }
741             break;
742         case OB_DIRECTION_NORTH:
743             --r;
744             if (r >= screen_desktop_layout.rows) {
745                 if (wrap) {
746                     r = screen_desktop_layout.rows - 1;
747                 } else {
748                     d = screen_desktop;
749                     goto show_cycle_dialog;
750                 }
751             }
752             d = translate_row_col(r, c);
753             if (d >= screen_num_desktops) {
754                 if (wrap) {
755                     --r;
756                 } else {
757                     d = screen_desktop;
758                     goto show_cycle_dialog;
759                 }
760             }
761             break;
762         default:
763             assert(0);
764             return d = screen_desktop;
765         }
766
767         d = translate_row_col(r, c);
768     }
769
770 show_cycle_dialog:
771     if (dialog && !cancel && !done) {
772         screen_desktop_popup(d, TRUE);
773     } else
774         screen_desktop_popup(0, FALSE);
775     return d;
776 }
777
778 void screen_update_layout()
779 {
780     ObOrientation orient;
781     ObCorner corner;
782     guint rows;
783     guint cols;
784     guint32 *data;
785     guint num;
786     gboolean valid = FALSE;
787
788     if (PROP_GETA32(RootWindow(ob_display, ob_screen),
789                     net_desktop_layout, cardinal, &data, &num)) {
790         if (num == 3 || num == 4) {
791
792             if (data[0] == prop_atoms.net_wm_orientation_vert)
793                 orient = OB_ORIENTATION_VERT;
794             else if (data[0] == prop_atoms.net_wm_orientation_horz)
795                 orient = OB_ORIENTATION_HORZ;
796             else
797                 goto screen_update_layout_bail;
798
799             if (num < 4)
800                 corner = OB_CORNER_TOPLEFT;
801             else {
802                 if (data[3] == prop_atoms.net_wm_topleft)
803                     corner = OB_CORNER_TOPLEFT;
804                 else if (data[3] == prop_atoms.net_wm_topright)
805                     corner = OB_CORNER_TOPRIGHT;
806                 else if (data[3] == prop_atoms.net_wm_bottomright)
807                     corner = OB_CORNER_BOTTOMRIGHT;
808                 else if (data[3] == prop_atoms.net_wm_bottomleft)
809                     corner = OB_CORNER_BOTTOMLEFT;
810                 else
811                     goto screen_update_layout_bail;
812             }
813
814             cols = data[1];
815             rows = data[2];
816
817             /* fill in a zero rows/columns */
818             if ((cols == 0 && rows == 0)) { /* both 0's is bad data.. */
819                 goto screen_update_layout_bail;
820             } else {
821                 if (cols == 0) {
822                     cols = screen_num_desktops / rows;
823                     if (rows * cols < screen_num_desktops)
824                         cols++;
825                     if (rows * cols >= screen_num_desktops + cols)
826                         rows--;
827                 } else if (rows == 0) {
828                     rows = screen_num_desktops / cols;
829                     if (cols * rows < screen_num_desktops)
830                         rows++;
831                     if (cols * rows >= screen_num_desktops + rows)
832                         cols--;
833                 }
834             }
835
836             /* bounds checking */
837             if (orient == OB_ORIENTATION_HORZ) {
838                 cols = MIN(screen_num_desktops, cols);
839                 rows = MIN(rows, (screen_num_desktops + cols - 1) / cols);
840                 cols = screen_num_desktops / rows +
841                     !!(screen_num_desktops % rows);
842             } else {
843                 rows = MIN(screen_num_desktops, rows);
844                 cols = MIN(cols, (screen_num_desktops + rows - 1) / rows);
845                 rows = screen_num_desktops / cols +
846                     !!(screen_num_desktops % cols);
847             }
848
849             valid = TRUE;
850         }
851     screen_update_layout_bail:
852         g_free(data);
853     }
854
855     if (!valid) {
856         /* defaults */
857         orient = OB_ORIENTATION_HORZ;
858         corner = OB_CORNER_TOPLEFT;
859         rows = 1;
860         cols = screen_num_desktops;
861     }
862
863     screen_desktop_layout.orientation = orient;
864     screen_desktop_layout.start_corner = corner;
865     screen_desktop_layout.rows = rows;
866     screen_desktop_layout.columns = cols;
867 }
868
869 void screen_update_desktop_names()
870 {
871     guint i;
872
873     /* empty the array */
874     g_strfreev(screen_desktop_names);
875     screen_desktop_names = NULL;
876
877     if (PROP_GETSS(RootWindow(ob_display, ob_screen),
878                    net_desktop_names, utf8, &screen_desktop_names))
879         for (i = 0; screen_desktop_names[i] && i < screen_num_desktops; ++i);
880     else
881         i = 0;
882     if (i < screen_num_desktops) {
883         screen_desktop_names = g_renew(gchar*, screen_desktop_names,
884                                        screen_num_desktops + 1);
885         screen_desktop_names[screen_num_desktops] = NULL;
886         for (; i < screen_num_desktops; ++i)
887             screen_desktop_names[i] = g_strdup_printf("desktop %i", i + 1);
888     }
889
890     /* resize the pager for these names */
891     pager_popup_text_width_to_strings(desktop_cycle_popup,
892                                       screen_desktop_names,
893                                       screen_num_desktops);
894 }
895
896 void screen_show_desktop(gboolean show, gboolean restore_focus)
897 {
898     GList *it;
899      
900     if (show == screen_showing_desktop) return; /* no change */
901
902     screen_showing_desktop = show;
903
904     if (show) {
905         /* bottom to top */
906         for (it = g_list_last(stacking_list); it; it = g_list_previous(it)) {
907             if (WINDOW_IS_CLIENT(it->data)) {
908                 ObClient *client = it->data;
909                 client_showhide(client);
910             }
911         }
912     } else {
913         /* top to bottom */
914         for (it = stacking_list; it; it = g_list_next(it)) {
915             if (WINDOW_IS_CLIENT(it->data)) {
916                 ObClient *client = it->data;
917                 client_showhide(client);
918             }
919         }
920     }
921
922     if (show) {
923         /* focus desktop */
924         for (it = focus_order; it; it = g_list_next(it)) {
925             ObClient *c = it->data;
926             if (c->type == OB_CLIENT_TYPE_DESKTOP &&
927                 (c->desktop == screen_desktop || c->desktop == DESKTOP_ALL) &&
928                 client_focus(it->data))
929                 break;
930         }
931     } else if (restore_focus) {
932         ObClient *c;
933
934         /* use NULL for the "old" argument because the desktop was focused
935            and we don't want to fallback to the desktop by default */
936         if ((c = focus_fallback_target(TRUE, NULL)))
937             client_focus(c);
938     }
939
940     show = !!show; /* make it boolean */
941     PROP_SET32(RootWindow(ob_display, ob_screen),
942                net_showing_desktop, cardinal, show);
943 }
944
945 void screen_install_colormap(ObClient *client, gboolean install)
946 {
947     if (client == NULL) {
948         if (install)
949             XInstallColormap(RrDisplay(ob_rr_inst), RrColormap(ob_rr_inst));
950         else
951             XUninstallColormap(RrDisplay(ob_rr_inst), RrColormap(ob_rr_inst));
952     } else {
953         xerror_set_ignore(TRUE);
954         if (install) {
955             if (client->colormap != None)
956                 XInstallColormap(RrDisplay(ob_rr_inst), client->colormap);
957         } else
958             XUninstallColormap(RrDisplay(ob_rr_inst), client->colormap);
959         xerror_set_ignore(FALSE);
960     }
961 }
962
963 static inline void
964 screen_area_add_strut_left(const StrutPartial *s, const Rect *monitor_area,
965                            gint edge, Strut *ret)
966 {
967     if (s->left &&
968         ((s->left_end <= s->left_start) ||
969          (RECT_TOP(*monitor_area) < s->left_end &&
970           RECT_BOTTOM(*monitor_area) > s->left_start)))
971         ret->left = MAX(ret->left, edge);
972 }
973
974 static inline void
975 screen_area_add_strut_top(const StrutPartial *s, const Rect *monitor_area,
976                           gint edge, Strut *ret)
977 {
978     if (s->top &&
979         ((s->top_end <= s->top_start) ||
980          (RECT_LEFT(*monitor_area) < s->top_end &&
981           RECT_RIGHT(*monitor_area) > s->top_start)))
982         ret->top = MAX(ret->top, edge);
983 }
984
985 static inline void
986 screen_area_add_strut_right(const StrutPartial *s, const Rect *monitor_area,
987                             gint edge, Strut *ret)
988 {
989     if (s->right &&
990         ((s->right_end <= s->right_start) ||
991          (RECT_TOP(*monitor_area) < s->right_end &&
992           RECT_BOTTOM(*monitor_area) > s->right_start)))
993         ret->right = MAX(ret->right, edge);
994 }
995
996 static inline void
997 screen_area_add_strut_bottom(const StrutPartial *s, const Rect *monitor_area,
998                              gint edge, Strut *ret)
999 {
1000     if (s->bottom &&
1001         ((s->bottom_end <= s->bottom_start) ||
1002          (RECT_LEFT(*monitor_area) < s->bottom_end &&
1003           RECT_RIGHT(*monitor_area) > s->bottom_start)))
1004         ret->bottom = MAX(ret->bottom, edge);
1005 }
1006
1007 void screen_update_areas()
1008 {
1009     guint i, x;
1010     gulong *dims;
1011     GList *it;
1012     gint o;
1013
1014     g_free(monitor_area);
1015     extensions_xinerama_screens(&monitor_area, &screen_num_monitors);
1016
1017     if (area) {
1018         for (i = 0; area[i]; ++i)
1019             g_free(area[i]);
1020         g_free(area);
1021     }
1022
1023     area = g_new(Rect*, screen_num_desktops + 2);
1024     for (i = 0; i < screen_num_desktops + 1; ++i)
1025         area[i] = g_new0(Rect, screen_num_monitors + 1);
1026     area[i] = NULL;
1027      
1028     dims = g_new(gulong, 4 * screen_num_desktops);
1029
1030     for (i = 0; i < screen_num_desktops + 1; ++i) {
1031         Strut *struts;
1032         gint l, r, t, b;
1033
1034         struts = g_new0(Strut, screen_num_monitors);
1035
1036         /* calc the xinerama areas */
1037         for (x = 0; x < screen_num_monitors; ++x) {
1038             area[i][x] = monitor_area[x];
1039             if (x == 0) {
1040                 l = monitor_area[x].x;
1041                 t = monitor_area[x].y;
1042                 r = monitor_area[x].x + monitor_area[x].width - 1;
1043                 b = monitor_area[x].y + monitor_area[x].height - 1;
1044             } else {
1045                 l = MIN(l, monitor_area[x].x);
1046                 t = MIN(t, monitor_area[x].y);
1047                 r = MAX(r, monitor_area[x].x + monitor_area[x].width - 1);
1048                 b = MAX(b, monitor_area[x].y + monitor_area[x].height - 1);
1049             }
1050         }
1051         RECT_SET(area[i][x], l, t, r - l + 1, b - t + 1);
1052
1053         /* apply the struts */
1054
1055         /* find the left-most xin heads, i do this in 2 loops :| */
1056         o = area[i][0].x;
1057         for (x = 1; x < screen_num_monitors; ++x)
1058             o = MIN(o, area[i][x].x);
1059
1060         for (x = 0; x < screen_num_monitors; ++x) {
1061             for (it = client_list; it; it = g_list_next(it)) {
1062                 ObClient *c = it->data;
1063                 screen_area_add_strut_left(&c->strut,
1064                                            &monitor_area[x],
1065                                            o + c->strut.left - area[i][x].x,
1066                                            &struts[x]);
1067             }
1068             screen_area_add_strut_left(&dock_strut,
1069                                        &monitor_area[x],
1070                                        o + dock_strut.left - area[i][x].x,
1071                                        &struts[x]);
1072
1073             area[i][x].x += struts[x].left;
1074             area[i][x].width -= struts[x].left;
1075         }
1076
1077         /* find the top-most xin heads, i do this in 2 loops :| */
1078         o = area[i][0].y;
1079         for (x = 1; x < screen_num_monitors; ++x)
1080             o = MIN(o, area[i][x].y);
1081
1082         for (x = 0; x < screen_num_monitors; ++x) {
1083             for (it = client_list; it; it = g_list_next(it)) {
1084                 ObClient *c = it->data;
1085                 screen_area_add_strut_top(&c->strut,
1086                                            &monitor_area[x],
1087                                            o + c->strut.top - area[i][x].y,
1088                                            &struts[x]);
1089             }
1090             screen_area_add_strut_top(&dock_strut,
1091                                       &monitor_area[x],
1092                                       o + dock_strut.top - area[i][x].y,
1093                                       &struts[x]);
1094
1095             area[i][x].y += struts[x].top;
1096             area[i][x].height -= struts[x].top;
1097         }
1098
1099         /* find the right-most xin heads, i do this in 2 loops :| */
1100         o = area[i][0].x + area[i][0].width - 1;
1101         for (x = 1; x < screen_num_monitors; ++x)
1102             o = MAX(o, area[i][x].x + area[i][x].width - 1);
1103
1104         for (x = 0; x < screen_num_monitors; ++x) {
1105             for (it = client_list; it; it = g_list_next(it)) {
1106                 ObClient *c = it->data;
1107                 screen_area_add_strut_right(&c->strut,
1108                                            &monitor_area[x],
1109                                            (area[i][x].x +
1110                                             area[i][x].width - 1) -
1111                                             (o - c->strut.right),
1112                                             &struts[x]);
1113             }
1114             screen_area_add_strut_right(&dock_strut,
1115                                         &monitor_area[x],
1116                                         (area[i][x].x +
1117                                          area[i][x].width - 1) -
1118                                         (o - dock_strut.right),
1119                                         &struts[x]);
1120
1121             area[i][x].width -= struts[x].right;
1122         }
1123
1124         /* find the bottom-most xin heads, i do this in 2 loops :| */
1125         o = area[i][0].y + area[i][0].height - 1;
1126         for (x = 1; x < screen_num_monitors; ++x)
1127             o = MAX(o, area[i][x].y + area[i][x].height - 1);
1128
1129         for (x = 0; x < screen_num_monitors; ++x) {
1130             for (it = client_list; it; it = g_list_next(it)) {
1131                 ObClient *c = it->data;
1132                 screen_area_add_strut_bottom(&c->strut,
1133                                              &monitor_area[x],
1134                                              (area[i][x].y +
1135                                               area[i][x].height - 1) - \
1136                                              (o - c->strut.bottom),
1137                                              &struts[x]);
1138             }
1139             screen_area_add_strut_bottom(&dock_strut,
1140                                          &monitor_area[x],
1141                                          (area[i][x].y +
1142                                           area[i][x].height - 1) - \
1143                                          (o - dock_strut.bottom),
1144                                          &struts[x]);
1145
1146             area[i][x].height -= struts[x].bottom;
1147         }
1148
1149         l = RECT_LEFT(area[i][0]);
1150         t = RECT_TOP(area[i][0]);
1151         r = RECT_RIGHT(area[i][0]);
1152         b = RECT_BOTTOM(area[i][0]);
1153         for (x = 1; x < screen_num_monitors; ++x) {
1154             l = MIN(l, RECT_LEFT(area[i][x]));
1155             t = MIN(l, RECT_TOP(area[i][x]));
1156             r = MAX(r, RECT_RIGHT(area[i][x]));
1157             b = MAX(b, RECT_BOTTOM(area[i][x]));
1158         }
1159         RECT_SET(area[i][screen_num_monitors], l, t,
1160                  r - l + 1, b - t + 1);
1161
1162         /* XXX optimize when this is run? */
1163
1164         /* the area has changed, adjust all the maximized 
1165            windows */
1166         for (it = client_list; it; it = g_list_next(it)) {
1167             ObClient *c = it->data; 
1168             if (i < screen_num_desktops) {
1169                 if (c->desktop == i)
1170                     client_reconfigure(c);
1171             } else if (c->desktop == DESKTOP_ALL)
1172                 client_reconfigure(c);
1173         }
1174         if (i < screen_num_desktops) {
1175             /* don't set these for the 'all desktops' area */
1176             dims[(i * 4) + 0] = area[i][screen_num_monitors].x;
1177             dims[(i * 4) + 1] = area[i][screen_num_monitors].y;
1178             dims[(i * 4) + 2] = area[i][screen_num_monitors].width;
1179             dims[(i * 4) + 3] = area[i][screen_num_monitors].height;
1180         }
1181
1182         g_free(struts);
1183     }
1184
1185     PROP_SETA32(RootWindow(ob_display, ob_screen), net_workarea, cardinal,
1186                 dims, 4 * screen_num_desktops);
1187
1188     g_free(dims);
1189 }
1190
1191 Rect *screen_area(guint desktop)
1192 {
1193     return screen_area_monitor(desktop, screen_num_monitors);
1194 }
1195
1196 Rect *screen_area_monitor(guint desktop, guint head)
1197 {
1198     if (head > screen_num_monitors)
1199         return NULL;
1200     if (desktop >= screen_num_desktops) {
1201         if (desktop == DESKTOP_ALL)
1202             return &area[screen_num_desktops][head];
1203         return NULL;
1204     }
1205     return &area[desktop][head];
1206 }
1207
1208 guint screen_find_monitor(Rect *search)
1209 {
1210     guint i;
1211     guint most = 0;
1212     guint mostv = 0;
1213
1214     for (i = 0; i < screen_num_monitors; ++i) {
1215         Rect *area = screen_physical_area_monitor(i);
1216         if (RECT_INTERSECTS_RECT(*area, *search)) {
1217             Rect r;
1218             guint v;
1219
1220             RECT_SET_INTERSECTION(r, *area, *search);
1221             v = r.width * r.height;
1222
1223             if (v > mostv) {
1224                 mostv = v;
1225                 most = i;
1226             }
1227         }
1228     }
1229     return most;
1230 }
1231
1232 Rect *screen_physical_area()
1233 {
1234     return screen_physical_area_monitor(screen_num_monitors);
1235 }
1236
1237 Rect *screen_physical_area_monitor(guint head)
1238 {
1239     if (head > screen_num_monitors)
1240         return NULL;
1241     return &monitor_area[head];
1242 }
1243
1244 void screen_set_root_cursor()
1245 {
1246     if (sn_app_starting())
1247         XDefineCursor(ob_display, RootWindow(ob_display, ob_screen),
1248                       ob_cursor(OB_CURSOR_BUSY));
1249     else
1250         XDefineCursor(ob_display, RootWindow(ob_display, ob_screen),
1251                       ob_cursor(OB_CURSOR_POINTER));
1252 }
1253
1254 gboolean screen_pointer_pos(gint *x, gint *y)
1255 {
1256     Window w;
1257     gint i;
1258     guint u;
1259     gboolean ret;
1260
1261     ret = !!XQueryPointer(ob_display, RootWindow(ob_display, ob_screen),
1262                           &w, &w, x, y, &i, &i, &u);
1263     if (!ret) {
1264         for (i = 0; i < ScreenCount(ob_display); ++i)
1265             if (i != ob_screen)
1266                 if (XQueryPointer(ob_display, RootWindow(ob_display, i),
1267                                   &w, &w, x, y, &i, &i, &u))
1268                     break;
1269     }
1270     return ret;
1271 }