little bit of an actions overhaul, added action_run* so that duplicated code can...
[mikachu/openbox.git] / openbox / screen.c
1 #include "debug.h"
2 #include "openbox.h"
3 #include "dock.h"
4 #include "xerror.h"
5 #include "prop.h"
6 #include "grab.h"
7 #include "startupnotify.h"
8 #include "config.h"
9 #include "screen.h"
10 #include "client.h"
11 #include "frame.h"
12 #include "focus.h"
13 #include "popup.h"
14 #include "extensions.h"
15 #include "render/render.h"
16
17 #include <X11/Xlib.h>
18 #ifdef HAVE_UNISTD_H
19 #  include <sys/types.h>
20 #  include <unistd.h>
21 #endif
22 #include <assert.h>
23
24 /*! The event mask to grab on the root window */
25 #define ROOT_EVENTMASK (StructureNotifyMask | PropertyChangeMask | \
26                         EnterWindowMask | LeaveWindowMask | \
27                         SubstructureNotifyMask | SubstructureRedirectMask | \
28                         ButtonPressMask | ButtonReleaseMask | ButtonMotionMask)
29
30 guint    screen_num_desktops;
31 guint    screen_num_monitors;
32 guint    screen_desktop;
33 guint    screen_last_desktop;
34 Size     screen_physical_size;
35 gboolean screen_showing_desktop;
36 DesktopLayout screen_desktop_layout;
37 char   **screen_desktop_names;
38 Window   screen_support_win;
39
40 static Rect  **area; /* array of desktop holding array of xinerama areas */
41 static Rect  *monitor_area;
42
43 static Popup *desktop_cycle_popup;
44
45 static gboolean replace_wm()
46 {
47     char *wm_sn;
48     Atom wm_sn_atom;
49     Window current_wm_sn_owner;
50     Time timestamp;
51
52     wm_sn = g_strdup_printf("WM_S%d", ob_screen);
53     wm_sn_atom = XInternAtom(ob_display, wm_sn, FALSE);
54     g_free(wm_sn);
55
56     current_wm_sn_owner = XGetSelectionOwner(ob_display, wm_sn_atom);
57     if (current_wm_sn_owner) {
58         if (!ob_replace_wm) {
59             g_warning("A window manager is already running on screen %d",
60                       ob_screen);
61             return FALSE;
62         }
63         xerror_set_ignore(TRUE);
64         xerror_occured = FALSE;
65
66         /* We want to find out when the current selection owner dies */
67         XSelectInput(ob_display, current_wm_sn_owner, StructureNotifyMask);
68         XSync(ob_display, FALSE);
69
70         xerror_set_ignore(FALSE);
71         if (xerror_occured)
72             current_wm_sn_owner = None;
73     }
74
75     {
76         /* Generate a timestamp */
77         XEvent event;
78
79         XSelectInput(ob_display, screen_support_win, PropertyChangeMask);
80
81         XChangeProperty(ob_display, screen_support_win,
82                         prop_atoms.wm_class, prop_atoms.string,
83                         8, PropModeAppend, NULL, 0);
84         XWindowEvent(ob_display, screen_support_win,
85                      PropertyChangeMask, &event);
86
87         XSelectInput(ob_display, screen_support_win, NoEventMask);
88
89         timestamp = event.xproperty.time;
90     }
91
92     XSetSelectionOwner(ob_display, wm_sn_atom, screen_support_win,
93                        timestamp);
94
95     if (XGetSelectionOwner(ob_display, wm_sn_atom) != screen_support_win) {
96         g_warning("Could not acquire window manager selection on screen %d",
97                   ob_screen);
98         return FALSE;
99     }
100
101     /* Wait for old window manager to go away */
102     if (current_wm_sn_owner) {
103       XEvent event;
104       gulong wait = 0;
105       const gulong timeout = G_USEC_PER_SEC * 15; /* wait for 15s max */
106
107       while (wait < timeout) {
108           if (XCheckWindowEvent(ob_display, current_wm_sn_owner,
109                                 StructureNotifyMask, &event) &&
110               event.type == DestroyNotify)
111               break;
112           g_usleep(G_USEC_PER_SEC / 10);
113           wait += G_USEC_PER_SEC / 10;
114       }
115
116       if (wait >= timeout) {
117           g_warning("Timeout expired while waiting for the current WM to die "
118                     "on screen %d", ob_screen);
119           return FALSE;
120       }
121     }
122
123     /* Send client message indicating that we are now the WM */
124     prop_message(RootWindow(ob_display, ob_screen), prop_atoms.manager,
125                  timestamp, wm_sn_atom, 0, 0, SubstructureNotifyMask);
126
127
128     return TRUE;
129 }
130
131 gboolean screen_annex()
132 {
133     XSetWindowAttributes attrib;
134     pid_t pid;
135     gint i, num_support;
136     guint32 *supported;
137
138     /* create the netwm support window */
139     attrib.override_redirect = TRUE;
140     screen_support_win = XCreateWindow(ob_display,
141                                        RootWindow(ob_display, ob_screen),
142                                        -100, -100, 1, 1, 0,
143                                        CopyFromParent, InputOutput,
144                                        CopyFromParent,
145                                        CWOverrideRedirect, &attrib);
146     XMapRaised(ob_display, screen_support_win);
147
148     if (!replace_wm()) {
149         XDestroyWindow(ob_display, screen_support_win);
150         return FALSE;
151     }
152
153     xerror_set_ignore(TRUE);
154     xerror_occured = FALSE;
155     XSelectInput(ob_display, RootWindow(ob_display, ob_screen),
156                  ROOT_EVENTMASK);
157     xerror_set_ignore(FALSE);
158     if (xerror_occured) {
159         g_warning("A window manager is already running on screen %d",
160                   ob_screen);
161
162         XDestroyWindow(ob_display, screen_support_win);
163         return FALSE;
164     }
165
166
167     screen_set_root_cursor();
168
169     /* set the OPENBOX_PID hint */
170     pid = getpid();
171     PROP_SET32(RootWindow(ob_display, ob_screen),
172                openbox_pid, cardinal, pid);
173
174     /* set supporting window */
175     PROP_SET32(RootWindow(ob_display, ob_screen),
176                net_supporting_wm_check, window, screen_support_win);
177
178     /* set properties on the supporting window */
179     PROP_SETS(screen_support_win, net_wm_name, "Openbox");
180     PROP_SET32(screen_support_win, net_supporting_wm_check,
181                window, screen_support_win);
182
183     /* set the _NET_SUPPORTED_ATOMS hint */
184     num_support = 50;
185     i = 0;
186     supported = g_new(guint32, num_support);
187     supported[i++] = prop_atoms.net_current_desktop;
188     supported[i++] = prop_atoms.net_number_of_desktops;
189     supported[i++] = prop_atoms.net_desktop_geometry;
190     supported[i++] = prop_atoms.net_desktop_viewport;
191     supported[i++] = prop_atoms.net_active_window;
192     supported[i++] = prop_atoms.net_workarea;
193     supported[i++] = prop_atoms.net_client_list;
194     supported[i++] = prop_atoms.net_client_list_stacking;
195     supported[i++] = prop_atoms.net_desktop_names;
196     supported[i++] = prop_atoms.net_close_window;
197     supported[i++] = prop_atoms.net_desktop_layout;
198     supported[i++] = prop_atoms.net_showing_desktop;
199     supported[i++] = prop_atoms.net_wm_name;
200     supported[i++] = prop_atoms.net_wm_visible_name;
201     supported[i++] = prop_atoms.net_wm_icon_name;
202     supported[i++] = prop_atoms.net_wm_visible_icon_name;
203     supported[i++] = prop_atoms.net_wm_desktop;
204     supported[i++] = prop_atoms.net_wm_strut;
205     supported[i++] = prop_atoms.net_wm_window_type;
206     supported[i++] = prop_atoms.net_wm_window_type_desktop;
207     supported[i++] = prop_atoms.net_wm_window_type_dock;
208     supported[i++] = prop_atoms.net_wm_window_type_toolbar;
209     supported[i++] = prop_atoms.net_wm_window_type_menu;
210     supported[i++] = prop_atoms.net_wm_window_type_utility;
211     supported[i++] = prop_atoms.net_wm_window_type_splash;
212     supported[i++] = prop_atoms.net_wm_window_type_dialog;
213     supported[i++] = prop_atoms.net_wm_window_type_normal;
214     supported[i++] = prop_atoms.net_wm_allowed_actions;
215     supported[i++] = prop_atoms.net_wm_action_move;
216     supported[i++] = prop_atoms.net_wm_action_resize;
217     supported[i++] = prop_atoms.net_wm_action_minimize;
218     supported[i++] = prop_atoms.net_wm_action_shade;
219     supported[i++] = prop_atoms.net_wm_action_maximize_horz;
220     supported[i++] = prop_atoms.net_wm_action_maximize_vert;
221     supported[i++] = prop_atoms.net_wm_action_fullscreen;
222     supported[i++] = prop_atoms.net_wm_action_change_desktop;
223     supported[i++] = prop_atoms.net_wm_action_close;
224     supported[i++] = prop_atoms.net_wm_state;
225     supported[i++] = prop_atoms.net_wm_state_modal;
226     supported[i++] = prop_atoms.net_wm_state_maximized_vert;
227     supported[i++] = prop_atoms.net_wm_state_maximized_horz;
228     supported[i++] = prop_atoms.net_wm_state_shaded;
229     supported[i++] = prop_atoms.net_wm_state_skip_taskbar;
230     supported[i++] = prop_atoms.net_wm_state_skip_pager;
231     supported[i++] = prop_atoms.net_wm_state_hidden;
232     supported[i++] = prop_atoms.net_wm_state_fullscreen;
233     supported[i++] = prop_atoms.net_wm_state_above;
234     supported[i++] = prop_atoms.net_wm_state_below;
235     supported[i++] = prop_atoms.net_moveresize_window;
236     supported[i++] = prop_atoms.net_wm_moveresize;
237     g_assert(i == num_support);
238 /*
239   supported[] = prop_atoms.net_wm_action_stick;
240 */
241
242     PROP_SETA32(RootWindow(ob_display, ob_screen),
243                 net_supported, atom, supported, num_support);
244     g_free(supported);
245
246     return TRUE;
247 }
248
249 void screen_startup(gboolean reconfig)
250 {
251     GSList *it;
252     guint i;
253
254     desktop_cycle_popup = popup_new(FALSE);
255
256     if (!reconfig)
257         /* get the initial size */
258         screen_resize();
259
260     /* set the names */
261     screen_desktop_names = g_new(char*,
262                                  g_slist_length(config_desktops_names) + 1);
263     for (i = 0, it = config_desktops_names; it; ++i, it = it->next)
264         screen_desktop_names[i] = it->data; /* dont strdup */
265     screen_desktop_names[i] = NULL;
266     PROP_SETSS(RootWindow(ob_display, ob_screen),
267                net_desktop_names, screen_desktop_names);
268     g_free(screen_desktop_names); /* dont free the individual strings */
269     screen_desktop_names = NULL;
270
271     if (!reconfig)
272         screen_num_desktops = 0;
273     screen_set_num_desktops(config_desktops_num);
274     if (!reconfig) {
275         screen_set_desktop(0);
276
277         /* don't start in showing-desktop mode */
278         screen_showing_desktop = FALSE;
279         PROP_SET32(RootWindow(ob_display, ob_screen),
280                    net_showing_desktop, cardinal, screen_showing_desktop);
281
282         screen_update_layout();
283     }
284 }
285
286 void screen_shutdown(gboolean reconfig)
287 {
288     Rect **r;
289
290     popup_free(desktop_cycle_popup);
291
292     if (!reconfig) {
293         XSelectInput(ob_display, RootWindow(ob_display, ob_screen),
294                      NoEventMask);
295
296         /* we're not running here no more! */
297         PROP_ERASE(RootWindow(ob_display, ob_screen), openbox_pid);
298         /* not without us */
299         PROP_ERASE(RootWindow(ob_display, ob_screen), net_supported);
300         /* don't keep this mode */
301         PROP_ERASE(RootWindow(ob_display, ob_screen), net_showing_desktop);
302
303         XDestroyWindow(ob_display, screen_support_win);
304     }
305
306     g_strfreev(screen_desktop_names);
307     screen_desktop_names = NULL;
308     for (r = area; *r; ++r)
309         g_free(*r);
310     g_free(area);
311     area = NULL;
312 }
313
314 void screen_resize()
315 {
316     static int oldw = 0, oldh = 0;
317     int w, h;
318     GList *it;
319     guint32 geometry[2];
320
321     w = WidthOfScreen(ScreenOfDisplay(ob_display, ob_screen));
322     h = HeightOfScreen(ScreenOfDisplay(ob_display, ob_screen));
323
324     if (w == oldw && h == oldh) return;
325
326     oldw = w; oldh = h;
327
328     /* Set the _NET_DESKTOP_GEOMETRY hint */
329     screen_physical_size.width = geometry[0] = w;
330     screen_physical_size.height = geometry[1] = h;
331     PROP_SETA32(RootWindow(ob_display, ob_screen),
332                 net_desktop_geometry, cardinal, geometry, 2);
333
334     if (ob_state() == OB_STATE_STARTING)
335         return;
336
337     screen_update_areas();
338     dock_configure();
339
340     for (it = client_list; it; it = it->next)
341         client_move_onscreen(it->data, FALSE);
342 }
343
344 void screen_set_num_desktops(guint num)
345 {
346     guint i, old;
347     guint32 *viewport;
348     GList *it;
349
350     g_assert(num > 0);
351
352     old = screen_num_desktops;
353     screen_num_desktops = num;
354     PROP_SET32(RootWindow(ob_display, ob_screen),
355                net_number_of_desktops, cardinal, num);
356
357     /* set the viewport hint */
358     viewport = g_new0(guint32, num * 2);
359     PROP_SETA32(RootWindow(ob_display, ob_screen),
360                 net_desktop_viewport, cardinal, viewport, num * 2);
361     g_free(viewport);
362
363     /* the number of rows/columns will differ */
364     screen_update_layout();
365
366     /* may be some unnamed desktops that we need to fill in with names */
367     screen_update_desktop_names();
368
369     /* update the focus lists */
370     /* free our lists for the desktops which have disappeared */
371     for (i = num; i < old; ++i)
372         g_list_free(focus_order[i]);
373     /* realloc the array */
374     focus_order = g_renew(GList*, focus_order, num);
375     /* set the new lists to be empty */
376     for (i = old; i < num; ++i)
377         focus_order[i] = NULL;
378
379     /* move windows on desktops that will no longer exist! */
380     for (it = client_list; it != NULL; it = it->next) {
381         ObClient *c = it->data;
382         if (c->desktop >= num && c->desktop != DESKTOP_ALL)
383             client_set_desktop(c, num - 1, FALSE);
384     }
385
386     /* change our struts/area to match (after moving windows) */
387     screen_update_areas();
388
389     /* change our desktop if we're on one that no longer exists! */
390     if (screen_desktop >= screen_num_desktops)
391         screen_set_desktop(num - 1);
392 }
393
394 void screen_set_desktop(guint num)
395 {
396     GList *it;
397     guint old;
398     XEvent e;
399      
400     g_assert(num < screen_num_desktops);
401
402     old = screen_desktop;
403     screen_desktop = num;
404     PROP_SET32(RootWindow(ob_display, ob_screen),
405                net_current_desktop, cardinal, num);
406
407     if (old == num) return;
408
409     screen_last_desktop = old;
410
411     ob_debug("Moving to desktop %d\n", num+1);
412
413     /* show windows before hiding the rest to lessen the enter/leave events */
414
415     /* show windows from top to bottom */
416     for (it = stacking_list; it != NULL; it = it->next) {
417         if (WINDOW_IS_CLIENT(it->data)) {
418             ObClient *c = it->data;
419             if (!c->frame->visible && client_should_show(c))
420                 frame_show(c->frame);
421         }
422     }
423
424     /* hide windows from bottom to top */
425     for (it = g_list_last(stacking_list); it != NULL; it = it->prev) {
426         if (WINDOW_IS_CLIENT(it->data)) {
427             ObClient *c = it->data;
428             if (c->frame->visible && !client_should_show(c))
429                 frame_hide(c->frame);
430         }
431     }
432
433     XSync(ob_display, FALSE);
434     /* focus the last focused window on the desktop, and ignore enter events
435        from the switch so it doesnt mess with the focus */
436     while (XCheckTypedEvent(ob_display, EnterNotify, &e));
437 #ifdef DEBUG_FOCUS
438     ob_debug("switch fallback\n");
439 #endif
440     focus_fallback(OB_FOCUS_FALLBACK_DESKTOP);
441 #ifdef DEBUG_FOCUS
442     ob_debug("/switch fallback\n");
443 #endif
444 }
445
446 static void get_row_col(guint d, guint *r, guint *c)
447 {
448     switch (screen_desktop_layout.orientation) {
449     case OB_ORIENTATION_HORZ:
450         switch (screen_desktop_layout.start_corner) {
451         case OB_CORNER_TOPLEFT:
452             *r = d / screen_desktop_layout.columns;
453             *c = d % screen_desktop_layout.columns;
454             break;
455         case OB_CORNER_BOTTOMLEFT:
456             *r = screen_desktop_layout.rows - 1 -
457                 d / screen_desktop_layout.columns;
458             *c = d % screen_desktop_layout.columns;
459             break;
460         case OB_CORNER_TOPRIGHT:
461             *r = d / screen_desktop_layout.columns;
462             *c = screen_desktop_layout.columns - 1 -
463                 d % screen_desktop_layout.columns;
464             break;
465         case OB_CORNER_BOTTOMRIGHT:
466             *r = screen_desktop_layout.rows - 1 -
467                 d / screen_desktop_layout.columns;
468             *c = screen_desktop_layout.columns - 1 -
469                 d % screen_desktop_layout.columns;
470             break;
471         }
472         break;
473     case OB_ORIENTATION_VERT:
474         switch (screen_desktop_layout.start_corner) {
475         case OB_CORNER_TOPLEFT:
476             *r = d % screen_desktop_layout.rows;
477             *c = d / screen_desktop_layout.rows;
478             break;
479         case OB_CORNER_BOTTOMLEFT:
480             *r = screen_desktop_layout.rows - 1 -
481                 d % screen_desktop_layout.rows;
482             *c = d / screen_desktop_layout.rows;
483             break;
484         case OB_CORNER_TOPRIGHT:
485             *r = d % screen_desktop_layout.rows;
486             *c = screen_desktop_layout.columns - 1 -
487                 d / screen_desktop_layout.rows;
488             break;
489         case OB_CORNER_BOTTOMRIGHT:
490             *r = screen_desktop_layout.rows - 1 -
491                 d % screen_desktop_layout.rows;
492             *c = screen_desktop_layout.columns - 1 -
493                 d / screen_desktop_layout.rows;
494             break;
495         }
496         break;
497     }
498 }
499
500 static guint translate_row_col(guint r, guint c)
501 {
502     switch (screen_desktop_layout.orientation) {
503     case OB_ORIENTATION_HORZ:
504         switch (screen_desktop_layout.start_corner) {
505         case OB_CORNER_TOPLEFT:
506             return r % screen_desktop_layout.rows *
507                 screen_desktop_layout.columns +
508                 c % screen_desktop_layout.columns;
509         case OB_CORNER_BOTTOMLEFT:
510             return (screen_desktop_layout.rows - 1 -
511                     r % screen_desktop_layout.rows) *
512                 screen_desktop_layout.columns +
513                 c % screen_desktop_layout.columns;
514         case OB_CORNER_TOPRIGHT:
515             return r % screen_desktop_layout.rows *
516                 screen_desktop_layout.columns +
517                 (screen_desktop_layout.columns - 1 -
518                  c % screen_desktop_layout.columns);
519         case OB_CORNER_BOTTOMRIGHT:
520             return (screen_desktop_layout.rows - 1 -
521                     r % screen_desktop_layout.rows) *
522                 screen_desktop_layout.columns +
523                 (screen_desktop_layout.columns - 1 -
524                  c % screen_desktop_layout.columns);
525         }
526     case OB_ORIENTATION_VERT:
527         switch (screen_desktop_layout.start_corner) {
528         case OB_CORNER_TOPLEFT:
529             return c % screen_desktop_layout.columns *
530                 screen_desktop_layout.rows +
531                 r % screen_desktop_layout.rows;
532         case OB_CORNER_BOTTOMLEFT:
533             return c % screen_desktop_layout.columns *
534                 screen_desktop_layout.rows +
535                 (screen_desktop_layout.rows - 1 -
536                  r % screen_desktop_layout.rows);
537         case OB_CORNER_TOPRIGHT:
538             return (screen_desktop_layout.columns - 1 -
539                     c % screen_desktop_layout.columns) *
540                 screen_desktop_layout.rows +
541                 r % screen_desktop_layout.rows;
542         case OB_CORNER_BOTTOMRIGHT:
543             return (screen_desktop_layout.columns - 1 -
544                     c % screen_desktop_layout.columns) *
545                 screen_desktop_layout.rows +
546                 (screen_desktop_layout.rows - 1 -
547                  r % screen_desktop_layout.rows);
548         }
549     }
550     g_assert_not_reached();
551     return 0;
552 }
553
554 static void popup_cycle(guint d, gboolean show)
555 {
556     Rect *a;
557
558     if (!show) {
559         popup_hide(desktop_cycle_popup);
560     } else {
561         a = screen_physical_area_monitor(0);
562         popup_position(desktop_cycle_popup, CenterGravity,
563                        a->x + a->width / 2, a->y + a->height / 2);
564         /* XXX the size and the font extents need to be related on some level
565          */
566         popup_size(desktop_cycle_popup, POPUP_WIDTH, POPUP_HEIGHT);
567
568         popup_set_text_align(desktop_cycle_popup, RR_JUSTIFY_CENTER);
569
570         popup_show(desktop_cycle_popup,
571                    screen_desktop_names[d], NULL);
572     }
573 }
574
575 guint screen_cycle_desktop(ObDirection dir, gboolean wrap, gboolean linear,
576                            gboolean dialog, gboolean done, gboolean cancel)
577 {
578     static gboolean first = TRUE;
579     static gboolean lin;
580     static guint origd, d;
581     guint r, c;
582
583     if (cancel) {
584         d = origd;
585         goto done_cycle;
586     } else if (done && dialog) {
587         goto done_cycle;
588     }
589     if (first) {
590         first = FALSE;
591         lin = linear;
592         d = origd = screen_desktop;
593     }
594
595     get_row_col(d, &r, &c);
596
597     if (lin) {
598         switch (dir) {
599         case OB_DIRECTION_EAST:
600             if (d < screen_num_desktops - 1)
601                 ++d;
602             else if (wrap)
603                 d = 0;
604             break;
605         case OB_DIRECTION_WEST:
606             if (d > 0)
607                 --d;
608             else if (wrap)
609                 d = screen_num_desktops - 1;
610             break;
611         default:
612             assert(0);
613             return screen_desktop;
614         }
615     } else {
616         switch (dir) {
617         case OB_DIRECTION_EAST:
618             ++c;
619             if (c >= screen_desktop_layout.columns) {
620                 if (!wrap) return d = screen_desktop;
621                 c = 0;
622             }
623             d = translate_row_col(r, c);
624             if (d >= screen_num_desktops) {
625                 if (!wrap) return d = screen_desktop;
626                 ++c;
627             }
628             break;
629         case OB_DIRECTION_WEST:
630             --c;
631             if (c >= screen_desktop_layout.columns) {
632                 if (!wrap) return d = screen_desktop;
633                 c = screen_desktop_layout.columns - 1;
634             }
635             d = translate_row_col(r, c);
636             if (d >= screen_num_desktops) {
637                 if (!wrap) return d = screen_desktop;
638                 --c;
639             }
640             break;
641         case OB_DIRECTION_SOUTH:
642             ++r;
643             if (r >= screen_desktop_layout.rows) {
644                 if (!wrap) return d = screen_desktop;
645                 r = 0;
646             }
647             d = translate_row_col(r, c);
648             if (d >= screen_num_desktops) {
649                 if (!wrap) return d = screen_desktop;
650                 ++r;
651             }
652             break;
653         case OB_DIRECTION_NORTH:
654             --r;
655             if (r >= screen_desktop_layout.rows) {
656                 if (!wrap) return d = screen_desktop;
657                 r = screen_desktop_layout.rows - 1;
658             }
659             d = translate_row_col(r, c);
660             if (d >= screen_num_desktops) {
661                 if (!wrap) return d = screen_desktop;
662                 --r;
663             }
664             break;
665         default:
666             assert(0);
667             return d = screen_desktop;
668         }
669
670         d = translate_row_col(r, c);
671     }
672
673     if (dialog) {
674         popup_cycle(d, TRUE);
675         return d;
676     }
677
678 done_cycle:
679     first = TRUE;
680
681     popup_cycle(0, FALSE);
682
683     return d;
684 }
685
686 void screen_update_layout()
687 {
688     ObOrientation orient;
689     ObCorner corner;
690     guint rows;
691     guint cols;
692     guint32 *data;
693     guint num;
694     gboolean valid = FALSE;
695
696     if (PROP_GETA32(RootWindow(ob_display, ob_screen),
697                     net_desktop_layout, cardinal, &data, &num)) {
698         if (num == 3 || num == 4) {
699
700             if (data[0] == prop_atoms.net_wm_orientation_vert)
701                 orient = OB_ORIENTATION_VERT;
702             else if (data[0] == prop_atoms.net_wm_orientation_horz)
703                 orient = OB_ORIENTATION_HORZ;
704             else
705                 goto screen_update_layout_bail;
706
707             if (num < 4)
708                 corner = OB_CORNER_TOPLEFT;
709             else {
710                 if (data[3] == prop_atoms.net_wm_topleft)
711                     corner = OB_CORNER_TOPLEFT;
712                 else if (data[3] == prop_atoms.net_wm_topright)
713                     corner = OB_CORNER_TOPRIGHT;
714                 else if (data[3] == prop_atoms.net_wm_bottomright)
715                     corner = OB_CORNER_BOTTOMRIGHT;
716                 else if (data[3] == prop_atoms.net_wm_bottomleft)
717                     corner = OB_CORNER_BOTTOMLEFT;
718                 else
719                     goto screen_update_layout_bail;
720             }
721
722             /* fill in a zero rows/columns */
723             if ((data[1] == 0 && data[2] == 0) || /* both 0's is bad data.. */
724                 (data[1] != 0 && data[2] != 0)) { /* no 0's is bad data.. */
725                 goto screen_update_layout_bail;
726             } else {
727                 if (data[1] == 0) {
728                     data[1] = (screen_num_desktops +
729                                screen_num_desktops % data[2]) / data[2];
730                 } else if (data[2] == 0) {
731                     data[2] = (screen_num_desktops +
732                                screen_num_desktops % data[1]) / data[1];
733                 }
734                 cols = data[1];
735                 rows = data[2];
736             }
737
738             /* bounds checking */
739             if (orient == OB_ORIENTATION_HORZ) {
740                 rows = MIN(rows, screen_num_desktops);
741                 cols = MIN(cols, ((screen_num_desktops +
742                                      (screen_num_desktops % rows)) / rows));
743             } else {
744                 cols = MIN(cols, screen_num_desktops);
745                 rows = MIN(rows, ((screen_num_desktops +
746                                      (screen_num_desktops % cols)) / cols));
747             }
748
749             valid = TRUE;
750         }
751     screen_update_layout_bail:
752         g_free(data);
753     }
754
755     if (!valid) {
756         /* defaults */
757         orient = OB_ORIENTATION_HORZ;
758         corner = OB_CORNER_TOPLEFT;
759         rows = 1;
760         cols = screen_num_desktops;
761     }
762
763     screen_desktop_layout.orientation = orient;
764     screen_desktop_layout.start_corner = corner;
765     screen_desktop_layout.rows = rows;
766     screen_desktop_layout.columns = cols;
767 }
768
769 void screen_update_desktop_names()
770 {
771     guint i;
772
773     /* empty the array */
774     g_strfreev(screen_desktop_names);
775     screen_desktop_names = NULL;
776
777     if (PROP_GETSS(RootWindow(ob_display, ob_screen),
778                    net_desktop_names, utf8, &screen_desktop_names))
779         for (i = 0; screen_desktop_names[i] && i <= screen_num_desktops; ++i);
780     else
781         i = 0;
782     if (i <= screen_num_desktops) {
783         screen_desktop_names = g_renew(char*, screen_desktop_names,
784                                        screen_num_desktops + 1);
785         screen_desktop_names[screen_num_desktops] = NULL;
786         for (; i < screen_num_desktops; ++i)
787             screen_desktop_names[i] = g_strdup("Unnamed Desktop");
788     }
789 }
790
791 void screen_show_desktop(gboolean show)
792 {
793     GList *it;
794      
795     if (show == screen_showing_desktop) return; /* no change */
796
797     screen_showing_desktop = show;
798
799     if (show) {
800         /* bottom to top */
801         for (it = g_list_last(stacking_list); it != NULL; it = it->prev) {
802             if (WINDOW_IS_CLIENT(it->data)) {
803                 ObClient *client = it->data;
804                 if (client->frame->visible && !client_should_show(client))
805                     frame_hide(client->frame);
806             }
807         }
808     } else {
809         /* top to bottom */
810         for (it = stacking_list; it != NULL; it = it->next) {
811             if (WINDOW_IS_CLIENT(it->data)) {
812                 ObClient *client = it->data;
813                 if (!client->frame->visible && client_should_show(client))
814                     frame_show(client->frame);
815             }
816         }
817     }
818
819     if (show) {
820         /* focus desktop */
821         for (it = focus_order[screen_desktop]; it; it = it->next)
822             if (((ObClient*)it->data)->type == OB_CLIENT_TYPE_DESKTOP &&
823                 client_focus(it->data))
824                 break;
825     } else {
826         focus_fallback(OB_FOCUS_FALLBACK_NOFOCUS);
827     }
828
829     show = !!show; /* make it boolean */
830     PROP_SET32(RootWindow(ob_display, ob_screen),
831                net_showing_desktop, cardinal, show);
832 }
833
834 void screen_install_colormap(ObClient *client, gboolean install)
835 {
836     XWindowAttributes wa;
837
838     if (client == NULL) {
839         if (install)
840             XInstallColormap(RrDisplay(ob_rr_inst), RrColormap(ob_rr_inst));
841         else
842             XUninstallColormap(RrDisplay(ob_rr_inst), RrColormap(ob_rr_inst));
843     } else {
844         if (XGetWindowAttributes(ob_display, client->window, &wa) &&
845             wa.colormap != None) {
846             xerror_set_ignore(TRUE);
847             if (install)
848                 XInstallColormap(RrDisplay(ob_rr_inst), wa.colormap);
849             else
850                 XUninstallColormap(RrDisplay(ob_rr_inst), wa.colormap);
851             xerror_set_ignore(FALSE);
852         }
853     }
854 }
855
856 void screen_update_areas()
857 {
858     guint i, x;
859     guint32 *dims;
860     GList *it;
861
862     g_free(monitor_area);
863     extensions_xinerama_screens(&monitor_area, &screen_num_monitors);
864
865     if (area) {
866         for (i = 0; area[i]; ++i)
867             g_free(area[i]);
868         g_free(area);
869     }
870
871     area = g_new(Rect*, screen_num_desktops + 2);
872     for (i = 0; i < screen_num_desktops + 1; ++i)
873         area[i] = g_new(Rect, screen_num_monitors + 1);
874     area[i] = NULL;
875      
876     dims = g_new(guint32, 4 * screen_num_desktops);
877
878     for (i = 0; i < screen_num_desktops + 1; ++i) {
879         Strut s;
880         int l, r, t, b;
881
882         /* calc the xinerama areas */
883         for (x = 0; x < screen_num_monitors; ++x) {
884             area[i][x] = monitor_area[x];
885             if (x == 0) {
886                 l = monitor_area[x].x;
887                 t = monitor_area[x].y;
888                 r = monitor_area[x].x + monitor_area[x].width - 1;
889                 b = monitor_area[x].y + monitor_area[x].height - 1;
890             } else {
891                 l = MIN(l, monitor_area[x].x);
892                 t = MIN(t, monitor_area[x].y);
893                 r = MAX(r, monitor_area[x].x + monitor_area[x].width - 1);
894                 b = MAX(b, monitor_area[x].y + monitor_area[x].height - 1);
895             }
896         }
897         RECT_SET(area[i][x], l, t, r - l + 1, b - t + 1);
898
899         /* apply struts */
900         STRUT_SET(s, 0, 0, 0, 0);
901         for (it = client_list; it; it = it->next)
902             STRUT_ADD(s, ((ObClient*)it->data)->strut);
903         STRUT_ADD(s, dock_strut);
904
905         if (s.left) {
906             int o;
907
908             /* find the left-most xin heads, i do this in 2 loops :| */
909             o = area[i][0].x;
910             for (x = 1; x < screen_num_monitors; ++x)
911                 o = MIN(o, area[i][x].x);
912
913             for (x = 0; x < screen_num_monitors; ++x) {
914                 int edge = o + s.left - area[i][x].x;
915                 if (edge > 0) {
916                     area[i][x].x += edge;
917                     area[i][x].width -= edge;
918                 }
919             }
920
921             area[i][screen_num_monitors].x += s.left;
922             area[i][screen_num_monitors].width -= s.left;
923         }
924         if (s.top) {
925             int o;
926
927             /* find the left-most xin heads, i do this in 2 loops :| */
928             o = area[i][0].y;
929             for (x = 1; x < screen_num_monitors; ++x)
930                 o = MIN(o, area[i][x].y);
931
932             for (x = 0; x < screen_num_monitors; ++x) {
933                 int edge = o + s.top - area[i][x].y;
934                 if (edge > 0) {
935                     area[i][x].y += edge;
936                     area[i][x].height -= edge;
937                 }
938             }
939
940             area[i][screen_num_monitors].y += s.top;
941             area[i][screen_num_monitors].height -= s.top;
942         }
943         if (s.right) {
944             int o;
945
946             /* find the bottom-most xin heads, i do this in 2 loops :| */
947             o = area[i][0].x + area[i][0].width - 1;
948             for (x = 1; x < screen_num_monitors; ++x)
949                 o = MAX(o, area[i][x].x + area[i][x].width - 1);
950
951             for (x = 0; x < screen_num_monitors; ++x) {
952                 int edge = (area[i][x].x + area[i][x].width - 1) -
953                     (o - s.right);
954                 if (edge > 0)
955                     area[i][x].width -= edge;
956             }
957
958             area[i][screen_num_monitors].width -= s.right;
959         }
960         if (s.bottom) {
961             int o;
962
963             /* find the bottom-most xin heads, i do this in 2 loops :| */
964             o = area[i][0].y + area[i][0].height - 1;
965             for (x = 1; x < screen_num_monitors; ++x)
966                 o = MAX(o, area[i][x].y + area[i][x].height - 1);
967
968             for (x = 0; x < screen_num_monitors; ++x) {
969                 int edge = (area[i][x].y + area[i][x].height - 1) -
970                     (o - s.bottom);
971                 if (edge > 0)
972                     area[i][x].height -= edge;
973             }
974
975             area[i][screen_num_monitors].height -= s.bottom;
976         }
977
978         /* XXX when dealing with partial struts, if its in a single
979            xinerama area, then only subtract it from that area's space
980         for (x = 0; x < screen_num_monitors; ++x) {
981             GList *it;
982
983
984                do something smart with it for the 'all xinerama areas' one...
985
986             for (it = client_list; it; it = it->next) {
987
988                 XXX if gunna test this shit, then gotta worry about when
989                 the client moves between xinerama heads..
990
991                 if (RECT_CONTAINS_RECT(((ObClient*)it->data)->frame->area,
992                                        area[i][x])) {
993
994                 }            
995             }
996         }
997         */
998
999         /* XXX optimize when this is run? */
1000
1001         /* the area has changed, adjust all the maximized 
1002            windows */
1003         for (it = client_list; it; it = it->next) {
1004             ObClient *c = it->data; 
1005             if (i < screen_num_desktops) {
1006                 if (c->desktop == i)
1007                     client_reconfigure(c);
1008             } else if (c->desktop == DESKTOP_ALL)
1009                 client_reconfigure(c);
1010         }
1011         if (i < screen_num_desktops) {
1012             /* don't set these for the 'all desktops' area */
1013             dims[(i * 4) + 0] = area[i][screen_num_monitors].x;
1014             dims[(i * 4) + 1] = area[i][screen_num_monitors].y;
1015             dims[(i * 4) + 2] = area[i][screen_num_monitors].width;
1016             dims[(i * 4) + 3] = area[i][screen_num_monitors].height;
1017         }
1018     }
1019     PROP_SETA32(RootWindow(ob_display, ob_screen), net_workarea, cardinal,
1020                 dims, 4 * screen_num_desktops);
1021
1022     g_free(dims);
1023 }
1024
1025 Rect *screen_area(guint desktop)
1026 {
1027     return screen_area_monitor(desktop, screen_num_monitors);
1028 }
1029
1030 Rect *screen_area_monitor(guint desktop, guint head)
1031 {
1032     if (head > screen_num_monitors)
1033         return NULL;
1034     if (desktop >= screen_num_desktops) {
1035         if (desktop == DESKTOP_ALL)
1036             return &area[screen_num_desktops][head];
1037         return NULL;
1038     }
1039     return &area[desktop][head];
1040 }
1041
1042 Rect *screen_physical_area()
1043 {
1044     return screen_physical_area_monitor(screen_num_monitors);
1045 }
1046
1047 Rect *screen_physical_area_monitor(guint head)
1048 {
1049     if (head > screen_num_monitors)
1050         return NULL;
1051     return &monitor_area[head];
1052 }
1053
1054 void screen_set_root_cursor()
1055 {
1056     if (sn_app_starting())
1057         XDefineCursor(ob_display, RootWindow(ob_display, ob_screen),
1058                       ob_cursor(OB_CURSOR_BUSY));
1059     else
1060         XDefineCursor(ob_display, RootWindow(ob_display, ob_screen),
1061                       ob_cursor(OB_CURSOR_POINTER));
1062 }
1063
1064 gboolean screen_pointer_pos(int *x, int *y)
1065 {
1066     Window w;
1067     int i;
1068     guint u;
1069
1070     return !!XQueryPointer(ob_display, RootWindow(ob_display, ob_screen),
1071                            &w, &w, x, y, &i, &i, &u);
1072 }