move ob_pointer_pos to screen_pointer_pos
[mikachu/openbox.git] / openbox / screen.c
1 #include "openbox.h"
2 #include "dock.h"
3 #include "xerror.h"
4 #include "prop.h"
5 #include "startup.h"
6 #include "timer.h"
7 #include "config.h"
8 #include "screen.h"
9 #include "client.h"
10 #include "frame.h"
11 #include "focus.h"
12 #include "dispatch.h"
13 #include "extensions.h"
14 #include "render/render.h"
15
16 #ifdef USE_LIBSN
17 #  define SN_API_NOT_YET_FROZEN
18 #  include <libsn/sn.h>
19 #endif
20
21 #include <X11/Xlib.h>
22 #ifdef HAVE_UNISTD_H
23 #  include <sys/types.h>
24 #  include <unistd.h>
25 #endif
26
27 /*! The event mask to grab on the root window */
28 #define ROOT_EVENTMASK (StructureNotifyMask | PropertyChangeMask | \
29                         EnterWindowMask | LeaveWindowMask | \
30                         SubstructureNotifyMask | SubstructureRedirectMask | \
31                         ButtonPressMask | ButtonReleaseMask | ButtonMotionMask)
32
33 guint    screen_num_desktops;
34 guint    screen_num_monitors;
35 guint    screen_desktop;
36 Size     screen_physical_size;
37 gboolean screen_showing_desktop;
38 DesktopLayout screen_desktop_layout;
39 char   **screen_desktop_names;
40 Window   screen_support_win;
41
42 static Rect  **area; /* array of desktop holding array of xinerama areas */
43 static Rect  *monitor_area;
44
45 #ifdef USE_LIBSN
46 static SnMonitorContext *sn_context;
47 static int sn_busy_cnt;
48 static ObTimer *sn_timer;
49
50 static void sn_event_func(SnMonitorEvent *event, void *data);
51 #endif
52
53 static void set_root_cursor();
54
55 gboolean screen_annex()
56 {
57     XSetWindowAttributes attrib;
58     pid_t pid;
59     gint i, num_support;
60     guint32 *supported;
61
62     xerror_set_ignore(TRUE);
63     xerror_occured = FALSE;
64     XSelectInput(ob_display, RootWindow(ob_display, ob_screen),
65                  ROOT_EVENTMASK);
66     xerror_set_ignore(FALSE);
67     if (xerror_occured) {
68         g_message("A window manager is already running on screen %d",
69                   ob_screen);
70         return FALSE;
71     }
72
73
74     g_message("Managing screen %d", ob_screen);
75
76     set_root_cursor();
77
78     /* set the OPENBOX_PID hint */
79     pid = getpid();
80     PROP_SET32(RootWindow(ob_display, ob_screen),
81                openbox_pid, cardinal, pid);
82
83     /* create the netwm support window */
84     attrib.override_redirect = TRUE;
85     screen_support_win = XCreateWindow(ob_display,
86                                        RootWindow(ob_display, ob_screen),
87                                        -100, -100, 1, 1, 0,
88                                        CopyFromParent, InputOutput,
89                                        CopyFromParent,
90                                        CWOverrideRedirect, &attrib);
91     XMapRaised(ob_display, screen_support_win);
92
93     /* set supporting window */
94     PROP_SET32(RootWindow(ob_display, ob_screen),
95                net_supporting_wm_check, window, screen_support_win);
96
97     /* set properties on the supporting window */
98     PROP_SETS(screen_support_win, net_wm_name, "Openbox");
99     PROP_SET32(screen_support_win, net_supporting_wm_check,
100                window, screen_support_win);
101
102     /* set the _NET_SUPPORTED_ATOMS hint */
103     num_support = 61;
104     i = 0;
105     supported = g_new(guint32, num_support);
106     supported[i++] = prop_atoms.net_current_desktop;
107     supported[i++] = prop_atoms.net_number_of_desktops;
108     supported[i++] = prop_atoms.net_desktop_geometry;
109     supported[i++] = prop_atoms.net_desktop_viewport;
110     supported[i++] = prop_atoms.net_active_window;
111     supported[i++] = prop_atoms.net_workarea;
112     supported[i++] = prop_atoms.net_client_list;
113     supported[i++] = prop_atoms.net_client_list_stacking;
114     supported[i++] = prop_atoms.net_desktop_names;
115     supported[i++] = prop_atoms.net_close_window;
116     supported[i++] = prop_atoms.net_desktop_layout;
117     supported[i++] = prop_atoms.net_showing_desktop;
118     supported[i++] = prop_atoms.net_wm_name;
119     supported[i++] = prop_atoms.net_wm_visible_name;
120     supported[i++] = prop_atoms.net_wm_icon_name;
121     supported[i++] = prop_atoms.net_wm_visible_icon_name;
122     supported[i++] = prop_atoms.net_wm_desktop;
123     supported[i++] = prop_atoms.net_wm_strut;
124     supported[i++] = prop_atoms.net_wm_window_type;
125     supported[i++] = prop_atoms.net_wm_window_type_desktop;
126     supported[i++] = prop_atoms.net_wm_window_type_dock;
127     supported[i++] = prop_atoms.net_wm_window_type_toolbar;
128     supported[i++] = prop_atoms.net_wm_window_type_menu;
129     supported[i++] = prop_atoms.net_wm_window_type_utility;
130     supported[i++] = prop_atoms.net_wm_window_type_splash;
131     supported[i++] = prop_atoms.net_wm_window_type_dialog;
132     supported[i++] = prop_atoms.net_wm_window_type_normal;
133     supported[i++] = prop_atoms.net_wm_allowed_actions;
134     supported[i++] = prop_atoms.net_wm_action_move;
135     supported[i++] = prop_atoms.net_wm_action_resize;
136     supported[i++] = prop_atoms.net_wm_action_minimize;
137     supported[i++] = prop_atoms.net_wm_action_shade;
138     supported[i++] = prop_atoms.net_wm_action_maximize_horz;
139     supported[i++] = prop_atoms.net_wm_action_maximize_vert;
140     supported[i++] = prop_atoms.net_wm_action_fullscreen;
141     supported[i++] = prop_atoms.net_wm_action_change_desktop;
142     supported[i++] = prop_atoms.net_wm_action_close;
143     supported[i++] = prop_atoms.net_wm_state;
144     supported[i++] = prop_atoms.net_wm_state_modal;
145     supported[i++] = prop_atoms.net_wm_state_maximized_vert;
146     supported[i++] = prop_atoms.net_wm_state_maximized_horz;
147     supported[i++] = prop_atoms.net_wm_state_shaded;
148     supported[i++] = prop_atoms.net_wm_state_skip_taskbar;
149     supported[i++] = prop_atoms.net_wm_state_skip_pager;
150     supported[i++] = prop_atoms.net_wm_state_hidden;
151     supported[i++] = prop_atoms.net_wm_state_fullscreen;
152     supported[i++] = prop_atoms.net_wm_state_above;
153     supported[i++] = prop_atoms.net_wm_state_below;
154     supported[i++] = prop_atoms.net_moveresize_window;
155     supported[i++] = prop_atoms.net_wm_moveresize;
156     supported[i++] = prop_atoms.net_wm_moveresize_size_topleft;
157     supported[i++] = prop_atoms.net_wm_moveresize_size_top;
158     supported[i++] = prop_atoms.net_wm_moveresize_size_topright;
159     supported[i++] = prop_atoms.net_wm_moveresize_size_right;
160     supported[i++] = prop_atoms.net_wm_moveresize_size_bottomright;
161     supported[i++] = prop_atoms.net_wm_moveresize_size_bottom;
162     supported[i++] = prop_atoms.net_wm_moveresize_size_bottomleft;
163     supported[i++] = prop_atoms.net_wm_moveresize_size_left;
164     supported[i++] = prop_atoms.net_wm_moveresize_move;
165     supported[i++] = prop_atoms.net_wm_moveresize_size_keyboard;
166     supported[i++] = prop_atoms.net_wm_moveresize_move_keyboard;
167     g_assert(i == num_support);
168 /*
169   supported[] = prop_atoms.net_wm_action_stick;
170 */
171
172     PROP_SETA32(RootWindow(ob_display, ob_screen),
173                 net_supported, atom, supported, num_support);
174     g_free(supported);
175
176     return TRUE;
177 }
178
179 void screen_startup()
180 {
181     GSList *it;
182     guint i;
183
184     /* get the initial size */
185     screen_resize();
186
187     /* set the names */
188     screen_desktop_names = g_new(char*,
189                                  g_slist_length(config_desktops_names) + 1);
190     for (i = 0, it = config_desktops_names; it; ++i, it = it->next)
191         screen_desktop_names[i] = it->data; /* dont strdup */
192     screen_desktop_names[i] = NULL;
193     PROP_SETSS(RootWindow(ob_display, ob_screen),
194                net_desktop_names, screen_desktop_names);
195     g_free(screen_desktop_names); /* dont free the individual strings */
196     screen_desktop_names = NULL;
197
198     screen_num_desktops = 0;
199     screen_set_num_desktops(config_desktops_num);
200     if (startup_desktop >= screen_num_desktops)
201         startup_desktop = 0;
202     screen_desktop = startup_desktop;
203     screen_set_desktop(startup_desktop);
204
205     /* don't start in showing-desktop mode */
206     screen_showing_desktop = FALSE;
207     PROP_SET32(RootWindow(ob_display, ob_screen),
208                net_showing_desktop, cardinal, screen_showing_desktop);
209
210     screen_update_layout();
211
212 #ifdef USE_LIBSN
213     sn_context = sn_monitor_context_new(ob_sn_display, ob_screen,
214                                         sn_event_func, NULL, NULL);
215     sn_busy_cnt = 0;
216 #endif
217 }
218
219 void screen_shutdown()
220 {
221     Rect **r;
222
223     XSelectInput(ob_display, RootWindow(ob_display, ob_screen), NoEventMask);
224
225     /* we're not running here no more! */
226     PROP_ERASE(RootWindow(ob_display, ob_screen), openbox_pid);
227     /* not without us */
228     PROP_ERASE(RootWindow(ob_display, ob_screen), net_supported);
229     /* don't keep this mode */
230     PROP_ERASE(RootWindow(ob_display, ob_screen), net_showing_desktop);
231
232     XDestroyWindow(ob_display, screen_support_win);
233
234     g_strfreev(screen_desktop_names);
235     for (r = area; *r; ++r)
236         g_free(*r);
237     g_free(area);
238 }
239
240 void screen_resize()
241 {
242     static int oldw = 0, oldh = 0;
243     int w, h;
244     GList *it;
245     guint32 geometry[2];
246
247     w = WidthOfScreen(ScreenOfDisplay(ob_display, ob_screen));
248     h = HeightOfScreen(ScreenOfDisplay(ob_display, ob_screen));
249
250     if (w == oldw && h == oldh) return;
251
252     oldw = w; oldh = h;
253
254     /* Set the _NET_DESKTOP_GEOMETRY hint */
255     screen_physical_size.width = geometry[0] = w;
256     screen_physical_size.height = geometry[1] = h;
257     PROP_SETA32(RootWindow(ob_display, ob_screen),
258                 net_desktop_geometry, cardinal, geometry, 2);
259
260     if (ob_state() == OB_STATE_STARTING)
261         return;
262
263     dock_configure();
264     screen_update_areas();
265
266     for (it = client_list; it; it = it->next)
267         client_move_onscreen(it->data);
268 }
269
270 void screen_set_num_desktops(guint num)
271 {
272     guint i, old;
273     guint32 *viewport;
274     GList *it;
275
276     g_assert(num > 0);
277
278     old = screen_num_desktops;
279     screen_num_desktops = num;
280     PROP_SET32(RootWindow(ob_display, ob_screen),
281                net_number_of_desktops, cardinal, num);
282
283     /* set the viewport hint */
284     viewport = g_new0(guint32, num * 2);
285     PROP_SETA32(RootWindow(ob_display, ob_screen),
286                 net_desktop_viewport, cardinal, viewport, num * 2);
287     g_free(viewport);
288
289     /* the number of rows/columns will differ */
290     screen_update_layout();
291
292     /* may be some unnamed desktops that we need to fill in with names */
293     screen_update_desktop_names();
294
295     /* update the focus lists */
296     /* free our lists for the desktops which have disappeared */
297     for (i = num; i < old; ++i)
298         g_list_free(focus_order[i]);
299     /* realloc the array */
300     focus_order = g_renew(GList*, focus_order, num);
301     /* set the new lists to be empty */
302     for (i = old; i < num; ++i)
303         focus_order[i] = NULL;
304
305     /* move windows on desktops that will no longer exist! */
306     for (it = client_list; it != NULL; it = it->next) {
307         ObClient *c = it->data;
308         if (c->desktop >= num && c->desktop != DESKTOP_ALL)
309             client_set_desktop(c, num - 1, FALSE);
310     }
311
312     /* change our struts/area to match (after moving windows) */
313     screen_update_areas();
314
315     dispatch_ob(Event_Ob_NumDesktops, num, old);
316
317     /* change our desktop if we're on one that no longer exists! */
318     if (screen_desktop >= screen_num_desktops)
319         screen_set_desktop(num - 1);
320 }
321
322 void screen_set_desktop(guint num)
323 {
324     GList *it;
325     guint old;
326     XEvent e;
327      
328     g_assert(num < screen_num_desktops);
329
330     old = screen_desktop;
331     screen_desktop = num;
332     PROP_SET32(RootWindow(ob_display, ob_screen),
333                net_current_desktop, cardinal, num);
334
335     if (old == num) return;
336
337     g_message("Moving to desktop %d", num+1);
338
339     /* show windows before hiding the rest to lessen the enter/leave events */
340
341     /* show windows from top to bottom */
342     for (it = stacking_list; it != NULL; it = it->next) {
343         if (WINDOW_IS_CLIENT(it->data)) {
344             ObClient *c = it->data;
345             if (!c->frame->visible && client_should_show(c))
346                 frame_show(c->frame);
347         }
348     }
349
350     /* hide windows from bottom to top */
351     for (it = g_list_last(stacking_list); it != NULL; it = it->prev) {
352         if (WINDOW_IS_CLIENT(it->data)) {
353             ObClient *c = it->data;
354             if (c->frame->visible && !client_should_show(c))
355                 frame_hide(c->frame);
356         }
357     }
358
359     /* focus the last focused window on the desktop, and ignore enter events
360        from the switch so it doesnt mess with the focus */
361     while (XCheckTypedEvent(ob_display, EnterNotify, &e));
362 #ifdef DEBUG_FOCUS
363     g_message("switch fallback");
364 #endif
365     focus_fallback(OB_FOCUS_FALLBACK_DESKTOP);
366 #ifdef DEBUG_FOCUS
367     g_message("/switch fallback");
368 #endif
369
370     dispatch_ob(Event_Ob_Desktop, num, old);
371 }
372
373 void screen_update_layout()
374 {
375     ObOrientation orient;
376     ObCorner corner;
377     guint rows;
378     guint cols;
379     guint32 *data;
380     guint num;
381     gboolean valid = FALSE;
382
383     if (PROP_GETA32(RootWindow(ob_display, ob_screen),
384                     net_desktop_layout, cardinal, &data, &num)) {
385         if (num == 3 || num == 4) {
386
387             if (data[0] == prop_atoms.net_wm_orientation_vert)
388                 orient = OB_ORIENTATION_VERT;
389             else if (data[0] == prop_atoms.net_wm_orientation_horz)
390                 orient = OB_ORIENTATION_HORZ;
391             else
392                 goto screen_update_layout_bail;
393
394             if (num < 4)
395                 corner = OB_CORNER_TOPLEFT;
396             else {
397                 if (data[3] == prop_atoms.net_wm_topright)
398                     corner = OB_CORNER_TOPRIGHT;
399                 else if (data[3] == prop_atoms.net_wm_bottomright)
400                     corner = OB_CORNER_BOTTOMRIGHT;
401                 else if (data[3] == prop_atoms.net_wm_bottomleft)
402                     corner = OB_CORNER_BOTTOMLEFT;
403                 else
404                     goto screen_update_layout_bail;
405             }
406
407             /* fill in a zero rows/columns */
408             if ((data[1] == 0 && data[2] == 0) || /* both 0's is bad data.. */
409                 (data[1] != 0 && data[2] != 0)) { /* no 0's is bad data.. */
410                 goto screen_update_layout_bail;
411             } else {
412                 if (data[1] == 0) {
413                     data[1] = (screen_num_desktops +
414                                screen_num_desktops % data[2]) / data[2];
415                 } else if (data[2] == 0) {
416                     data[2] = (screen_num_desktops +
417                                screen_num_desktops % data[1]) / data[1];
418                 }
419                 cols = data[1];
420                 rows = data[2];
421             }
422
423             /* bounds checking */
424             if (orient == OB_ORIENTATION_HORZ) {
425                 rows = MIN(rows, screen_num_desktops);
426                 cols = MIN(cols, ((screen_num_desktops +
427                                      (screen_num_desktops % rows)) / rows));
428             } else {
429                 cols = MIN(cols, screen_num_desktops);
430                 rows = MIN(rows, ((screen_num_desktops +
431                                      (screen_num_desktops % cols)) / cols));
432             }
433
434             valid = TRUE;
435         }
436     screen_update_layout_bail:
437         g_free(data);
438     }
439
440     if (!valid) {
441         /* defaults */
442         orient = OB_ORIENTATION_HORZ;
443         corner = OB_CORNER_TOPLEFT;
444         rows = 1;
445         cols = screen_num_desktops;
446     }
447
448     screen_desktop_layout.orientation = orient;
449     screen_desktop_layout.start_corner = corner;
450     screen_desktop_layout.rows = rows;
451     screen_desktop_layout.columns = cols;
452 }
453
454 void screen_update_desktop_names()
455 {
456     guint i;
457
458     /* empty the array */
459     g_strfreev(screen_desktop_names);
460     screen_desktop_names = NULL;
461
462     if (PROP_GETSS(RootWindow(ob_display, ob_screen),
463                    net_desktop_names, utf8, &screen_desktop_names))
464         for (i = 0; screen_desktop_names[i] && i <= screen_num_desktops; ++i);
465     else
466         i = 0;
467     if (i <= screen_num_desktops) {
468         screen_desktop_names = g_renew(char*, screen_desktop_names,
469                                        screen_num_desktops + 1);
470         screen_desktop_names[screen_num_desktops] = NULL;
471         for (; i < screen_num_desktops; ++i)
472             screen_desktop_names[i] = g_strdup("Unnamed Desktop");
473     }
474 }
475
476 void screen_show_desktop(gboolean show)
477 {
478     GList *it;
479      
480     if (show == screen_showing_desktop) return; /* no change */
481
482     screen_showing_desktop = show;
483
484     if (show) {
485         /* bottom to top */
486         for (it = g_list_last(stacking_list); it != NULL; it = it->prev) {
487             if (WINDOW_IS_CLIENT(it->data)) {
488                 ObClient *client = it->data;
489                 if (client->frame->visible && !client_should_show(client))
490                     frame_hide(client->frame);
491             }
492         }
493     } else {
494         /* top to bottom */
495         for (it = stacking_list; it != NULL; it = it->next) {
496             if (WINDOW_IS_CLIENT(it->data)) {
497                 ObClient *client = it->data;
498                 if (!client->frame->visible && client_should_show(client))
499                     frame_show(client->frame);
500             }
501         }
502     }
503
504     if (show) {
505         /* focus desktop */
506         for (it = focus_order[screen_desktop]; it; it = it->next)
507             if (((ObClient*)it->data)->type == OB_CLIENT_TYPE_DESKTOP &&
508                 client_focus(it->data))
509                 break;
510     } else {
511         focus_fallback(OB_FOCUS_FALLBACK_NOFOCUS);
512     }
513
514     show = !!show; /* make it boolean */
515     PROP_SET32(RootWindow(ob_display, ob_screen),
516                net_showing_desktop, cardinal, show);
517
518     dispatch_ob(Event_Ob_ShowDesktop, show, 0);
519 }
520
521 void screen_install_colormap(ObClient *client, gboolean install)
522 {
523     XWindowAttributes wa;
524
525     if (client == NULL) {
526         if (install)
527             XInstallColormap(RrDisplay(ob_rr_inst), RrColormap(ob_rr_inst));
528         else
529             XUninstallColormap(RrDisplay(ob_rr_inst), RrColormap(ob_rr_inst));
530     } else {
531         if (XGetWindowAttributes(ob_display, client->window, &wa) &&
532             wa.colormap != None) {
533             xerror_set_ignore(TRUE);
534             if (install)
535                 XInstallColormap(RrDisplay(ob_rr_inst), wa.colormap);
536             else
537                 XUninstallColormap(RrDisplay(ob_rr_inst), wa.colormap);
538             xerror_set_ignore(FALSE);
539         }
540     }
541 }
542
543 void screen_update_areas()
544 {
545     guint i, x;
546     guint32 *dims;
547     Rect **old_area = area;
548     Rect **rit;
549     GList *it;
550
551     g_free(monitor_area);
552     extensions_xinerama_screens(&monitor_area, &screen_num_monitors);
553
554     if (area) {
555         for (i = 0; area[i]; ++i)
556             g_free(area[i]);
557         g_free(area);
558     }
559
560     area = g_new(Rect*, screen_num_desktops + 2);
561     for (i = 0; i < screen_num_desktops + 1; ++i)
562         area[i] = g_new(Rect, screen_num_monitors + 1);
563     area[i] = NULL;
564      
565     dims = g_new(guint32, 4 * screen_num_desktops);
566
567     rit = old_area;
568     for (i = 0; i < screen_num_desktops + 1; ++i) {
569         Strut s;
570         int l, r, t, b;
571
572         /* calc the xinerama areas */
573         for (x = 0; x < screen_num_monitors; ++x) {
574             area[i][x] = monitor_area[x];
575             if (x == 0) {
576                 l = monitor_area[x].x;
577                 t = monitor_area[x].y;
578                 r = monitor_area[x].x + monitor_area[x].width - 1;
579                 b = monitor_area[x].y + monitor_area[x].height - 1;
580             } else {
581                 l = MIN(l, monitor_area[x].x);
582                 t = MIN(t, monitor_area[x].y);
583                 r = MAX(r, monitor_area[x].x + monitor_area[x].width - 1);
584                 b = MAX(b, monitor_area[x].y + monitor_area[x].height - 1);
585             }
586         }
587         RECT_SET(area[i][x], l, t, r - l + 1, b - t + 1);
588
589         /* apply struts */
590         STRUT_SET(s, 0, 0, 0, 0);
591         for (it = client_list; it; it = it->next)
592             STRUT_ADD(s, ((ObClient*)it->data)->strut);
593         STRUT_ADD(s, dock_strut);
594
595         if (s.left) {
596             int o;
597
598             /* find the left-most xin heads, i do this in 2 loops :| */
599             o = area[i][0].x;
600             for (x = 1; x < screen_num_monitors; ++x)
601                 o = MIN(o, area[i][x].x);
602
603             for (x = 0; x < screen_num_monitors; ++x) {
604                 int edge = o + s.left - area[i][x].x;
605                 if (edge > 0) {
606                     area[i][x].x += edge;
607                     area[i][x].width -= edge;
608                 }
609             }
610
611             area[i][screen_num_monitors].x += s.left;
612             area[i][screen_num_monitors].width -= s.left;
613         }
614         if (s.top) {
615             int o;
616
617             /* find the left-most xin heads, i do this in 2 loops :| */
618             o = area[i][0].y;
619             for (x = 1; x < screen_num_monitors; ++x)
620                 o = MIN(o, area[i][x].y);
621
622             for (x = 0; x < screen_num_monitors; ++x) {
623                 int edge = o + s.top - area[i][x].y;
624                 if (edge > 0) {
625                     area[i][x].y += edge;
626                     area[i][x].height -= edge;
627                 }
628             }
629
630             area[i][screen_num_monitors].y += s.top;
631             area[i][screen_num_monitors].height -= s.top;
632         }
633         if (s.right) {
634             int o;
635
636             /* find the bottom-most xin heads, i do this in 2 loops :| */
637             o = area[i][0].x + area[i][0].width - 1;
638             for (x = 1; x < screen_num_monitors; ++x)
639                 o = MAX(o, area[i][x].x + area[i][x].width - 1);
640
641             for (x = 0; x < screen_num_monitors; ++x) {
642                 int edge = (area[i][x].x + area[i][x].width - 1) -
643                     (o - s.right);
644                 if (edge > 0)
645                     area[i][x].width -= edge;
646             }
647
648             area[i][screen_num_monitors].width -= s.right;
649         }
650         if (s.bottom) {
651             int o;
652
653             /* find the bottom-most xin heads, i do this in 2 loops :| */
654             o = area[i][0].y + area[i][0].height - 1;
655             for (x = 1; x < screen_num_monitors; ++x)
656                 o = MAX(o, area[i][x].y + area[i][x].height - 1);
657
658             for (x = 0; x < screen_num_monitors; ++x) {
659                 int edge = (area[i][x].y + area[i][x].height - 1) -
660                     (o - s.bottom);
661                 if (edge > 0)
662                     area[i][x].height -= edge;
663             }
664
665             area[i][screen_num_monitors].height -= s.bottom;
666         }
667
668         /* XXX when dealing with partial struts, if its in a single
669            xinerama area, then only subtract it from that area's space
670         for (x = 0; x < screen_num_monitors; ++x) {
671             GList *it;
672
673
674                do something smart with it for the 'all xinerama areas' one...
675
676             for (it = client_list; it; it = it->next) {
677
678                 XXX if gunna test this shit, then gotta worry about when
679                 the client moves between xinerama heads..
680
681                 if (RECT_CONTAINS_RECT(((ObClient*)it->data)->frame->area,
682                                        area[i][x])) {
683
684                 }            
685             }
686         }
687         */
688
689         /* XXX optimize when this is run? */
690
691         /* the area has changed, adjust all the maximized 
692            windows */
693         for (it = client_list; it; it = it->next) {
694             ObClient *c = it->data; 
695             if (i < screen_num_desktops) {
696                 if (c->desktop == i)
697                     client_reconfigure(c);
698             } else if (c->desktop == DESKTOP_ALL)
699                 client_reconfigure(c);
700         }
701         if (i < screen_num_desktops) {
702             /* don't set these for the 'all desktops' area */
703             dims[(i * 4) + 0] = area[i][screen_num_monitors].x;
704             dims[(i * 4) + 1] = area[i][screen_num_monitors].y;
705             dims[(i * 4) + 2] = area[i][screen_num_monitors].width;
706             dims[(i * 4) + 3] = area[i][screen_num_monitors].height;
707         }
708     }
709     PROP_SETA32(RootWindow(ob_display, ob_screen), net_workarea, cardinal,
710                 dims, 4 * screen_num_desktops);
711
712     g_free(dims);
713 }
714
715 Rect *screen_area(guint desktop)
716 {
717     return screen_area_monitor(desktop, screen_num_monitors);
718 }
719
720 Rect *screen_area_monitor(guint desktop, guint head)
721 {
722     if (head > screen_num_monitors)
723         return NULL;
724     if (desktop >= screen_num_desktops) {
725         if (desktop == DESKTOP_ALL)
726             return &area[screen_num_desktops][head];
727         return NULL;
728     }
729     return &area[desktop][head];
730 }
731
732 Rect *screen_physical_area()
733 {
734     return screen_physical_area_monitor(screen_num_monitors);
735 }
736
737 Rect *screen_physical_area_monitor(guint head)
738 {
739     if (head > screen_num_monitors)
740         return NULL;
741     return &monitor_area[head];
742 }
743
744 static void set_root_cursor()
745 {
746 #ifdef USE_LIBSN
747         if (sn_busy_cnt)
748             XDefineCursor(ob_display, RootWindow(ob_display, ob_screen),
749                           ob_cursor(OB_CURSOR_BUSY));
750         else
751 #endif
752             XDefineCursor(ob_display, RootWindow(ob_display, ob_screen),
753                           ob_cursor(OB_CURSOR_POINTER));
754 }
755
756 #ifdef USE_LIBSN
757 static void sn_timeout(void *data)
758 {
759     timer_stop(sn_timer);
760     sn_timer = NULL;
761     sn_busy_cnt = 0;
762
763     set_root_cursor();
764 }
765
766 static void sn_event_func(SnMonitorEvent *ev, void *data)
767 {
768     SnStartupSequence *seq;
769     const char *seq_id, *bin_name;
770     int cnt = sn_busy_cnt;
771
772     if (!(seq = sn_monitor_event_get_startup_sequence(ev)))
773         return;
774
775     seq_id = sn_startup_sequence_get_id(seq);
776     bin_name = sn_startup_sequence_get_binary_name(seq);
777     
778     if (!(seq_id && bin_name))
779         return;
780
781     switch (sn_monitor_event_get_type(ev)) {
782     case SN_MONITOR_EVENT_INITIATED:
783         ++sn_busy_cnt;
784         if (sn_timer)
785             timer_stop(sn_timer);
786         /* 30 second timeout for apps to start */
787         sn_timer = timer_start(30 * 1000000, sn_timeout, NULL);
788         break;
789     case SN_MONITOR_EVENT_CHANGED:
790         break;
791     case SN_MONITOR_EVENT_COMPLETED:
792         if (sn_busy_cnt) --sn_busy_cnt;
793         if (sn_timer) {
794             timer_stop(sn_timer);
795             sn_timer = NULL;
796         }
797         break;
798     case SN_MONITOR_EVENT_CANCELED:
799         if (sn_busy_cnt) --sn_busy_cnt;
800         if (sn_timer) {
801             timer_stop(sn_timer);
802             sn_timer = NULL;
803         }
804     };
805
806     if (sn_busy_cnt != cnt)
807         set_root_cursor();
808 }
809 #endif
810
811 gboolean screen_pointer_pos(int *x, int *y)
812 {
813     Window w;
814     int i;
815     guint u;
816
817     return !!XQueryPointer(ob_display, RootWindow(ob_display, ob_screen),
818                            &w, &w, x, y, &i, &i, &u);
819 }