make sure math is done in the right order
[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_icon_size_multiplier(desktop_cycle_popup,
645                                          (screen_desktop_layout.columns /
646                                           screen_desktop_layout.rows) / 2,
647                                          (screen_desktop_layout.rows/
648                                           screen_desktop_layout.columns) / 2);
649         pager_popup_max_width(desktop_cycle_popup,
650                               MAX(a->width/3, POPUP_WIDTH));
651         pager_popup_show(desktop_cycle_popup, screen_desktop_names[d], d);
652     }
653 }
654
655 guint screen_cycle_desktop(ObDirection dir, gboolean wrap, gboolean linear,
656                            gboolean dialog, gboolean done, gboolean cancel)
657 {
658     guint r, c;
659     static guint d = (guint)-1;
660     guint ret;
661
662     if (d == (guint)-1)
663         d = screen_desktop;
664
665     if ((cancel || done) && dialog)
666         goto show_cycle_dialog;
667
668     get_row_col(d, &r, &c);
669
670     if (linear) {
671         switch (dir) {
672         case OB_DIRECTION_EAST:
673             if (d < screen_num_desktops - 1)
674                 ++d;
675             else if (wrap)
676                 d = 0;
677             break;
678         case OB_DIRECTION_WEST:
679             if (d > 0)
680                 --d;
681             else if (wrap)
682                 d = screen_num_desktops - 1;
683             break;
684         default:
685             assert(0);
686             return screen_desktop;
687         }
688     } else {
689         switch (dir) {
690         case OB_DIRECTION_EAST:
691             ++c;
692             if (c >= screen_desktop_layout.columns) {
693                 if (wrap) {
694                     c = 0;
695                 } else {
696                     d = screen_desktop;
697                     goto show_cycle_dialog;
698                 }
699             }
700             d = translate_row_col(r, c);
701             if (d >= screen_num_desktops) {
702                 if (wrap) {
703                     ++c;
704                 } else {
705                     d = screen_desktop;
706                     goto show_cycle_dialog;
707                 }
708             }
709             break;
710         case OB_DIRECTION_WEST:
711             --c;
712             if (c >= screen_desktop_layout.columns) {
713                 if (wrap) {
714                     c = screen_desktop_layout.columns - 1;
715                 } else {
716                     d = screen_desktop;
717                     goto show_cycle_dialog;
718                 }
719             }
720             d = translate_row_col(r, c);
721             if (d >= screen_num_desktops) {
722                 if (wrap) {
723                     --c;
724                 } else {
725                     d = screen_desktop;
726                     goto show_cycle_dialog;
727                 }
728             }
729             break;
730         case OB_DIRECTION_SOUTH:
731             ++r;
732             if (r >= screen_desktop_layout.rows) {
733                 if (wrap) {
734                     r = 0;
735                 } else {
736                     d = screen_desktop;
737                     goto show_cycle_dialog;
738                 }
739             }
740             d = translate_row_col(r, c);
741             if (d >= screen_num_desktops) {
742                 if (wrap) {
743                     ++r;
744                 } else {
745                     d = screen_desktop;
746                     goto show_cycle_dialog;
747                 }
748             }
749             break;
750         case OB_DIRECTION_NORTH:
751             --r;
752             if (r >= screen_desktop_layout.rows) {
753                 if (wrap) {
754                     r = screen_desktop_layout.rows - 1;
755                 } else {
756                     d = screen_desktop;
757                     goto show_cycle_dialog;
758                 }
759             }
760             d = translate_row_col(r, c);
761             if (d >= screen_num_desktops) {
762                 if (wrap) {
763                     --r;
764                 } else {
765                     d = screen_desktop;
766                     goto show_cycle_dialog;
767                 }
768             }
769             break;
770         default:
771             assert(0);
772             return d = screen_desktop;
773         }
774
775         d = translate_row_col(r, c);
776     }
777
778 show_cycle_dialog:
779     if (dialog && !cancel && !done) {
780         screen_desktop_popup(d, TRUE);
781     } else
782         screen_desktop_popup(0, FALSE);
783     ret = d;
784
785     if (!dialog || cancel || done)
786         d = (guint)-1;
787
788     return ret;
789 }
790
791 void screen_update_layout()
792 {
793     ObOrientation orient;
794     ObCorner corner;
795     guint rows;
796     guint cols;
797     guint32 *data;
798     guint num;
799     gboolean valid = FALSE;
800
801     if (PROP_GETA32(RootWindow(ob_display, ob_screen),
802                     net_desktop_layout, cardinal, &data, &num)) {
803         if (num == 3 || num == 4) {
804
805             if (data[0] == prop_atoms.net_wm_orientation_vert)
806                 orient = OB_ORIENTATION_VERT;
807             else if (data[0] == prop_atoms.net_wm_orientation_horz)
808                 orient = OB_ORIENTATION_HORZ;
809             else
810                 goto screen_update_layout_bail;
811
812             if (num < 4)
813                 corner = OB_CORNER_TOPLEFT;
814             else {
815                 if (data[3] == prop_atoms.net_wm_topleft)
816                     corner = OB_CORNER_TOPLEFT;
817                 else if (data[3] == prop_atoms.net_wm_topright)
818                     corner = OB_CORNER_TOPRIGHT;
819                 else if (data[3] == prop_atoms.net_wm_bottomright)
820                     corner = OB_CORNER_BOTTOMRIGHT;
821                 else if (data[3] == prop_atoms.net_wm_bottomleft)
822                     corner = OB_CORNER_BOTTOMLEFT;
823                 else
824                     goto screen_update_layout_bail;
825             }
826
827             cols = data[1];
828             rows = data[2];
829
830             /* fill in a zero rows/columns */
831             if ((cols == 0 && rows == 0)) { /* both 0's is bad data.. */
832                 goto screen_update_layout_bail;
833             } else {
834                 if (cols == 0) {
835                     cols = screen_num_desktops / rows;
836                     if (rows * cols < screen_num_desktops)
837                         cols++;
838                     if (rows * cols >= screen_num_desktops + cols)
839                         rows--;
840                 } else if (rows == 0) {
841                     rows = screen_num_desktops / cols;
842                     if (cols * rows < screen_num_desktops)
843                         rows++;
844                     if (cols * rows >= screen_num_desktops + rows)
845                         cols--;
846                 }
847             }
848
849             /* bounds checking */
850             if (orient == OB_ORIENTATION_HORZ) {
851                 cols = MIN(screen_num_desktops, cols);
852                 rows = MIN(rows, (screen_num_desktops + cols - 1) / cols);
853                 cols = screen_num_desktops / rows +
854                     !!(screen_num_desktops % rows);
855             } else {
856                 rows = MIN(screen_num_desktops, rows);
857                 cols = MIN(cols, (screen_num_desktops + rows - 1) / rows);
858                 rows = screen_num_desktops / cols +
859                     !!(screen_num_desktops % cols);
860             }
861
862             valid = TRUE;
863         }
864     screen_update_layout_bail:
865         g_free(data);
866     }
867
868     if (!valid) {
869         /* defaults */
870         orient = OB_ORIENTATION_HORZ;
871         corner = OB_CORNER_TOPLEFT;
872         rows = 1;
873         cols = screen_num_desktops;
874     }
875
876     screen_desktop_layout.orientation = orient;
877     screen_desktop_layout.start_corner = corner;
878     screen_desktop_layout.rows = rows;
879     screen_desktop_layout.columns = cols;
880 }
881
882 void screen_update_desktop_names()
883 {
884     guint i;
885
886     /* empty the array */
887     g_strfreev(screen_desktop_names);
888     screen_desktop_names = NULL;
889
890     if (PROP_GETSS(RootWindow(ob_display, ob_screen),
891                    net_desktop_names, utf8, &screen_desktop_names))
892         for (i = 0; screen_desktop_names[i] && i < screen_num_desktops; ++i);
893     else
894         i = 0;
895     if (i < screen_num_desktops) {
896         screen_desktop_names = g_renew(gchar*, screen_desktop_names,
897                                        screen_num_desktops + 1);
898         screen_desktop_names[screen_num_desktops] = NULL;
899         for (; i < screen_num_desktops; ++i)
900             screen_desktop_names[i] = g_strdup_printf("desktop %i", i + 1);
901     }
902
903     /* resize the pager for these names */
904     pager_popup_text_width_to_strings(desktop_cycle_popup,
905                                       screen_desktop_names,
906                                       screen_num_desktops);
907 }
908
909 void screen_show_desktop(gboolean show, gboolean restore_focus)
910 {
911     GList *it;
912      
913     if (show == screen_showing_desktop) return; /* no change */
914
915     screen_showing_desktop = show;
916
917     if (show) {
918         /* bottom to top */
919         for (it = g_list_last(stacking_list); it; it = g_list_previous(it)) {
920             if (WINDOW_IS_CLIENT(it->data)) {
921                 ObClient *client = it->data;
922                 client_showhide(client);
923             }
924         }
925     } else {
926         /* top to bottom */
927         for (it = stacking_list; it; it = g_list_next(it)) {
928             if (WINDOW_IS_CLIENT(it->data)) {
929                 ObClient *client = it->data;
930                 client_showhide(client);
931             }
932         }
933     }
934
935     if (show) {
936         /* focus desktop */
937         for (it = focus_order; it; it = g_list_next(it)) {
938             ObClient *c = it->data;
939             if (c->type == OB_CLIENT_TYPE_DESKTOP &&
940                 (c->desktop == screen_desktop || c->desktop == DESKTOP_ALL) &&
941                 client_focus(it->data))
942                 break;
943         }
944     } else if (restore_focus) {
945         ObClient *c;
946
947         /* use NULL for the "old" argument because the desktop was focused
948            and we don't want to fallback to the desktop by default */
949         if ((c = focus_fallback_target(TRUE, NULL)))
950             client_focus(c);
951     }
952
953     show = !!show; /* make it boolean */
954     PROP_SET32(RootWindow(ob_display, ob_screen),
955                net_showing_desktop, cardinal, show);
956 }
957
958 void screen_install_colormap(ObClient *client, gboolean install)
959 {
960     if (client == NULL) {
961         if (install)
962             XInstallColormap(RrDisplay(ob_rr_inst), RrColormap(ob_rr_inst));
963         else
964             XUninstallColormap(RrDisplay(ob_rr_inst), RrColormap(ob_rr_inst));
965     } else {
966         xerror_set_ignore(TRUE);
967         if (install) {
968             if (client->colormap != None)
969                 XInstallColormap(RrDisplay(ob_rr_inst), client->colormap);
970         } else
971             XUninstallColormap(RrDisplay(ob_rr_inst), client->colormap);
972         xerror_set_ignore(FALSE);
973     }
974 }
975
976 static inline void
977 screen_area_add_strut_left(const StrutPartial *s, const Rect *monitor_area,
978                            gint edge, Strut *ret)
979 {
980     if (s->left &&
981         ((s->left_end <= s->left_start) ||
982          (RECT_TOP(*monitor_area) < s->left_end &&
983           RECT_BOTTOM(*monitor_area) > s->left_start)))
984         ret->left = MAX(ret->left, edge);
985 }
986
987 static inline void
988 screen_area_add_strut_top(const StrutPartial *s, const Rect *monitor_area,
989                           gint edge, Strut *ret)
990 {
991     if (s->top &&
992         ((s->top_end <= s->top_start) ||
993          (RECT_LEFT(*monitor_area) < s->top_end &&
994           RECT_RIGHT(*monitor_area) > s->top_start)))
995         ret->top = MAX(ret->top, edge);
996 }
997
998 static inline void
999 screen_area_add_strut_right(const StrutPartial *s, const Rect *monitor_area,
1000                             gint edge, Strut *ret)
1001 {
1002     if (s->right &&
1003         ((s->right_end <= s->right_start) ||
1004          (RECT_TOP(*monitor_area) < s->right_end &&
1005           RECT_BOTTOM(*monitor_area) > s->right_start)))
1006         ret->right = MAX(ret->right, edge);
1007 }
1008
1009 static inline void
1010 screen_area_add_strut_bottom(const StrutPartial *s, const Rect *monitor_area,
1011                              gint edge, Strut *ret)
1012 {
1013     if (s->bottom &&
1014         ((s->bottom_end <= s->bottom_start) ||
1015          (RECT_LEFT(*monitor_area) < s->bottom_end &&
1016           RECT_RIGHT(*monitor_area) > s->bottom_start)))
1017         ret->bottom = MAX(ret->bottom, edge);
1018 }
1019
1020 void screen_update_areas()
1021 {
1022     guint i, x;
1023     gulong *dims;
1024     GList *it;
1025     gint o;
1026
1027     g_free(monitor_area);
1028     extensions_xinerama_screens(&monitor_area, &screen_num_monitors);
1029
1030     if (area) {
1031         for (i = 0; area[i]; ++i)
1032             g_free(area[i]);
1033         g_free(area);
1034     }
1035
1036     area = g_new(Rect*, screen_num_desktops + 2);
1037     for (i = 0; i < screen_num_desktops + 1; ++i)
1038         area[i] = g_new0(Rect, screen_num_monitors + 1);
1039     area[i] = NULL;
1040      
1041     dims = g_new(gulong, 4 * screen_num_desktops);
1042
1043     for (i = 0; i < screen_num_desktops + 1; ++i) {
1044         Strut *struts;
1045         gint l, r, t, b;
1046
1047         struts = g_new0(Strut, screen_num_monitors);
1048
1049         /* calc the xinerama areas */
1050         for (x = 0; x < screen_num_monitors; ++x) {
1051             area[i][x] = monitor_area[x];
1052             if (x == 0) {
1053                 l = monitor_area[x].x;
1054                 t = monitor_area[x].y;
1055                 r = monitor_area[x].x + monitor_area[x].width - 1;
1056                 b = monitor_area[x].y + monitor_area[x].height - 1;
1057             } else {
1058                 l = MIN(l, monitor_area[x].x);
1059                 t = MIN(t, monitor_area[x].y);
1060                 r = MAX(r, monitor_area[x].x + monitor_area[x].width - 1);
1061                 b = MAX(b, monitor_area[x].y + monitor_area[x].height - 1);
1062             }
1063         }
1064         RECT_SET(area[i][x], l, t, r - l + 1, b - t + 1);
1065
1066         /* apply the struts */
1067
1068         /* find the left-most xin heads, i do this in 2 loops :| */
1069         o = area[i][0].x;
1070         for (x = 1; x < screen_num_monitors; ++x)
1071             o = MIN(o, area[i][x].x);
1072
1073         for (x = 0; x < screen_num_monitors; ++x) {
1074             for (it = client_list; it; it = g_list_next(it)) {
1075                 ObClient *c = it->data;
1076                 screen_area_add_strut_left(&c->strut,
1077                                            &monitor_area[x],
1078                                            o + c->strut.left - area[i][x].x,
1079                                            &struts[x]);
1080             }
1081             screen_area_add_strut_left(&dock_strut,
1082                                        &monitor_area[x],
1083                                        o + dock_strut.left - area[i][x].x,
1084                                        &struts[x]);
1085
1086             area[i][x].x += struts[x].left;
1087             area[i][x].width -= struts[x].left;
1088         }
1089
1090         /* find the top-most xin heads, i do this in 2 loops :| */
1091         o = area[i][0].y;
1092         for (x = 1; x < screen_num_monitors; ++x)
1093             o = MIN(o, area[i][x].y);
1094
1095         for (x = 0; x < screen_num_monitors; ++x) {
1096             for (it = client_list; it; it = g_list_next(it)) {
1097                 ObClient *c = it->data;
1098                 screen_area_add_strut_top(&c->strut,
1099                                            &monitor_area[x],
1100                                            o + c->strut.top - area[i][x].y,
1101                                            &struts[x]);
1102             }
1103             screen_area_add_strut_top(&dock_strut,
1104                                       &monitor_area[x],
1105                                       o + dock_strut.top - area[i][x].y,
1106                                       &struts[x]);
1107
1108             area[i][x].y += struts[x].top;
1109             area[i][x].height -= struts[x].top;
1110         }
1111
1112         /* find the right-most xin heads, i do this in 2 loops :| */
1113         o = area[i][0].x + area[i][0].width - 1;
1114         for (x = 1; x < screen_num_monitors; ++x)
1115             o = MAX(o, area[i][x].x + area[i][x].width - 1);
1116
1117         for (x = 0; x < screen_num_monitors; ++x) {
1118             for (it = client_list; it; it = g_list_next(it)) {
1119                 ObClient *c = it->data;
1120                 screen_area_add_strut_right(&c->strut,
1121                                            &monitor_area[x],
1122                                            (area[i][x].x +
1123                                             area[i][x].width - 1) -
1124                                             (o - c->strut.right),
1125                                             &struts[x]);
1126             }
1127             screen_area_add_strut_right(&dock_strut,
1128                                         &monitor_area[x],
1129                                         (area[i][x].x +
1130                                          area[i][x].width - 1) -
1131                                         (o - dock_strut.right),
1132                                         &struts[x]);
1133
1134             area[i][x].width -= struts[x].right;
1135         }
1136
1137         /* find the bottom-most xin heads, i do this in 2 loops :| */
1138         o = area[i][0].y + area[i][0].height - 1;
1139         for (x = 1; x < screen_num_monitors; ++x)
1140             o = MAX(o, area[i][x].y + area[i][x].height - 1);
1141
1142         for (x = 0; x < screen_num_monitors; ++x) {
1143             for (it = client_list; it; it = g_list_next(it)) {
1144                 ObClient *c = it->data;
1145                 screen_area_add_strut_bottom(&c->strut,
1146                                              &monitor_area[x],
1147                                              (area[i][x].y +
1148                                               area[i][x].height - 1) - \
1149                                              (o - c->strut.bottom),
1150                                              &struts[x]);
1151             }
1152             screen_area_add_strut_bottom(&dock_strut,
1153                                          &monitor_area[x],
1154                                          (area[i][x].y +
1155                                           area[i][x].height - 1) - \
1156                                          (o - dock_strut.bottom),
1157                                          &struts[x]);
1158
1159             area[i][x].height -= struts[x].bottom;
1160         }
1161
1162         l = RECT_LEFT(area[i][0]);
1163         t = RECT_TOP(area[i][0]);
1164         r = RECT_RIGHT(area[i][0]);
1165         b = RECT_BOTTOM(area[i][0]);
1166         for (x = 1; x < screen_num_monitors; ++x) {
1167             l = MIN(l, RECT_LEFT(area[i][x]));
1168             t = MIN(l, RECT_TOP(area[i][x]));
1169             r = MAX(r, RECT_RIGHT(area[i][x]));
1170             b = MAX(b, RECT_BOTTOM(area[i][x]));
1171         }
1172         RECT_SET(area[i][screen_num_monitors], l, t,
1173                  r - l + 1, b - t + 1);
1174
1175         /* XXX optimize when this is run? */
1176
1177         /* the area has changed, adjust all the maximized 
1178            windows */
1179         for (it = client_list; it; it = g_list_next(it)) {
1180             ObClient *c = it->data; 
1181             if (i < screen_num_desktops) {
1182                 if (c->desktop == i)
1183                     client_reconfigure(c);
1184             } else if (c->desktop == DESKTOP_ALL)
1185                 client_reconfigure(c);
1186         }
1187         if (i < screen_num_desktops) {
1188             /* don't set these for the 'all desktops' area */
1189             dims[(i * 4) + 0] = area[i][screen_num_monitors].x;
1190             dims[(i * 4) + 1] = area[i][screen_num_monitors].y;
1191             dims[(i * 4) + 2] = area[i][screen_num_monitors].width;
1192             dims[(i * 4) + 3] = area[i][screen_num_monitors].height;
1193         }
1194
1195         g_free(struts);
1196     }
1197
1198     PROP_SETA32(RootWindow(ob_display, ob_screen), net_workarea, cardinal,
1199                 dims, 4 * screen_num_desktops);
1200
1201     g_free(dims);
1202 }
1203
1204 Rect *screen_area(guint desktop)
1205 {
1206     return screen_area_monitor(desktop, screen_num_monitors);
1207 }
1208
1209 Rect *screen_area_monitor(guint desktop, guint head)
1210 {
1211     if (head > screen_num_monitors)
1212         return NULL;
1213     if (desktop >= screen_num_desktops) {
1214         if (desktop == DESKTOP_ALL)
1215             return &area[screen_num_desktops][head];
1216         return NULL;
1217     }
1218     return &area[desktop][head];
1219 }
1220
1221 guint screen_find_monitor(Rect *search)
1222 {
1223     guint i;
1224     guint most = 0;
1225     guint mostv = 0;
1226
1227     for (i = 0; i < screen_num_monitors; ++i) {
1228         Rect *area = screen_physical_area_monitor(i);
1229         if (RECT_INTERSECTS_RECT(*area, *search)) {
1230             Rect r;
1231             guint v;
1232
1233             RECT_SET_INTERSECTION(r, *area, *search);
1234             v = r.width * r.height;
1235
1236             if (v > mostv) {
1237                 mostv = v;
1238                 most = i;
1239             }
1240         }
1241     }
1242     return most;
1243 }
1244
1245 Rect *screen_physical_area()
1246 {
1247     return screen_physical_area_monitor(screen_num_monitors);
1248 }
1249
1250 Rect *screen_physical_area_monitor(guint head)
1251 {
1252     if (head > screen_num_monitors)
1253         return NULL;
1254     return &monitor_area[head];
1255 }
1256
1257 void screen_set_root_cursor()
1258 {
1259     if (sn_app_starting())
1260         XDefineCursor(ob_display, RootWindow(ob_display, ob_screen),
1261                       ob_cursor(OB_CURSOR_BUSY));
1262     else
1263         XDefineCursor(ob_display, RootWindow(ob_display, ob_screen),
1264                       ob_cursor(OB_CURSOR_POINTER));
1265 }
1266
1267 gboolean screen_pointer_pos(gint *x, gint *y)
1268 {
1269     Window w;
1270     gint i;
1271     guint u;
1272     gboolean ret;
1273
1274     ret = !!XQueryPointer(ob_display, RootWindow(ob_display, ob_screen),
1275                           &w, &w, x, y, &i, &i, &u);
1276     if (!ret) {
1277         for (i = 0; i < ScreenCount(ob_display); ++i)
1278             if (i != ob_screen)
1279                 if (XQueryPointer(ob_display, RootWindow(ob_display, i),
1280                                   &w, &w, x, y, &i, &i, &u))
1281                     break;
1282     }
1283     return ret;
1284 }