move the xerror handling into the libobt
[dana/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 "prop.h"
24 #include "grab.h"
25 #include "startupnotify.h"
26 #include "moveresize.h"
27 #include "config.h"
28 #include "mainloop.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 #include "obt/display.h"
40
41 #include <X11/Xlib.h>
42 #ifdef HAVE_UNISTD_H
43 #  include <sys/types.h>
44 #  include <unistd.h>
45 #endif
46 #include <assert.h>
47
48 /*! The event mask to grab on the root window */
49 #define ROOT_EVENTMASK (StructureNotifyMask | PropertyChangeMask | \
50                         EnterWindowMask | LeaveWindowMask | \
51                         SubstructureRedirectMask | FocusChangeMask | \
52                         ButtonPressMask | ButtonReleaseMask)
53
54 static gboolean screen_validate_layout(ObDesktopLayout *l);
55 static gboolean replace_wm(void);
56 static void     screen_tell_ksplash(void);
57 static void     screen_fallback_focus(void);
58
59 guint    screen_num_desktops;
60 guint    screen_num_monitors;
61 guint    screen_desktop;
62 guint    screen_last_desktop = 1;
63 gboolean screen_showing_desktop;
64 ObDesktopLayout screen_desktop_layout;
65 gchar  **screen_desktop_names;
66 Window   screen_support_win;
67 Time     screen_desktop_user_time = CurrentTime;
68
69 static Size     screen_physical_size;
70 static guint    screen_old_desktop;
71 static gboolean screen_desktop_timeout = TRUE;
72 /*! An array of desktops, holding array of areas per monitor */
73 static Rect  *monitor_area = NULL;
74 /*! An array of desktops, holding an array of struts */
75 static GSList *struts_top = NULL;
76 static GSList *struts_left = NULL;
77 static GSList *struts_right = NULL;
78 static GSList *struts_bottom = NULL;
79
80 static ObPagerPopup *desktop_popup;
81
82 /*! The number of microseconds that you need to be on a desktop before it will
83   replace the remembered "last desktop" */
84 #define REMEMBER_LAST_DESKTOP_TIME 750000
85
86 static gboolean replace_wm(void)
87 {
88     gchar *wm_sn;
89     Atom wm_sn_atom;
90     Window current_wm_sn_owner;
91     Time timestamp;
92
93     wm_sn = g_strdup_printf("WM_S%d", ob_screen);
94     wm_sn_atom = XInternAtom(ob_display, wm_sn, FALSE);
95     g_free(wm_sn);
96
97     current_wm_sn_owner = XGetSelectionOwner(ob_display, wm_sn_atom);
98     if (current_wm_sn_owner == screen_support_win)
99         current_wm_sn_owner = None;
100     if (current_wm_sn_owner) {
101         if (!ob_replace_wm) {
102             g_message(_("A window manager is already running on screen %d"),
103                       ob_screen);
104             return FALSE;
105         }
106         obt_display_ignore_errors(ob_display, TRUE);
107
108         /* We want to find out when the current selection owner dies */
109         XSelectInput(ob_display, current_wm_sn_owner, StructureNotifyMask);
110         XSync(ob_display, FALSE);
111
112         obt_display_ignore_errors(ob_display, FALSE);
113         if (obt_display_error_occured())
114             current_wm_sn_owner = None;
115     }
116
117     timestamp = event_get_server_time();
118
119     XSetSelectionOwner(ob_display, wm_sn_atom, screen_support_win,
120                        timestamp);
121
122     if (XGetSelectionOwner(ob_display, wm_sn_atom) != screen_support_win) {
123         g_message(_("Could not acquire window manager selection on screen %d"),
124                   ob_screen);
125         return FALSE;
126     }
127
128     /* Wait for old window manager to go away */
129     if (current_wm_sn_owner) {
130       XEvent event;
131       gulong wait = 0;
132       const gulong timeout = G_USEC_PER_SEC * 15; /* wait for 15s max */
133
134       while (wait < timeout) {
135           if (XCheckWindowEvent(ob_display, current_wm_sn_owner,
136                                 StructureNotifyMask, &event) &&
137               event.type == DestroyNotify)
138               break;
139           g_usleep(G_USEC_PER_SEC / 10);
140           wait += G_USEC_PER_SEC / 10;
141       }
142
143       if (wait >= timeout) {
144           g_message(_("The WM on screen %d is not exiting"), ob_screen);
145           return FALSE;
146       }
147     }
148
149     /* Send client message indicating that we are now the WM */
150     prop_message(RootWindow(ob_display, ob_screen), prop_atoms.manager,
151                  timestamp, wm_sn_atom, screen_support_win, 0,
152                  SubstructureNotifyMask);
153
154     return TRUE;
155 }
156
157 gboolean screen_annex(void)
158 {
159     XSetWindowAttributes attrib;
160     pid_t pid;
161     gint i, num_support;
162     Atom *prop_atoms_start, *wm_supported_pos;
163     gulong *supported;
164
165     /* create the netwm support window */
166     attrib.override_redirect = TRUE;
167     attrib.event_mask = PropertyChangeMask;
168     screen_support_win = XCreateWindow(ob_display,
169                                        RootWindow(ob_display, ob_screen),
170                                        -100, -100, 1, 1, 0,
171                                        CopyFromParent, InputOutput,
172                                        CopyFromParent,
173                                        CWEventMask | CWOverrideRedirect,
174                                        &attrib);
175     XMapWindow(ob_display, screen_support_win);
176     XLowerWindow(ob_display, screen_support_win);
177
178     if (!replace_wm()) {
179         XDestroyWindow(ob_display, screen_support_win);
180         return FALSE;
181     }
182
183     obt_display_ignore_errors(ob_display, TRUE);
184     XSelectInput(ob_display, RootWindow(ob_display, ob_screen),
185                  ROOT_EVENTMASK);
186     obt_display_ignore_errors(ob_display, FALSE);
187     if (obt_display_error_occured()) {
188         g_message(_("A window manager is already running on screen %d"),
189                   ob_screen);
190
191         XDestroyWindow(ob_display, screen_support_win);
192         return FALSE;
193     }
194
195     screen_set_root_cursor();
196
197     /* set the OPENBOX_PID hint */
198     pid = getpid();
199     PROP_SET32(RootWindow(ob_display, ob_screen),
200                openbox_pid, cardinal, pid);
201
202     /* set supporting window */
203     PROP_SET32(RootWindow(ob_display, ob_screen),
204                net_supporting_wm_check, window, screen_support_win);
205
206     /* set properties on the supporting window */
207     PROP_SETS(screen_support_win, net_wm_name, "Openbox");
208     PROP_SET32(screen_support_win, net_supporting_wm_check,
209                window, screen_support_win);
210
211     /* set the _NET_SUPPORTED_ATOMS hint */
212
213     /* this is all the atoms after net_supported in the prop_atoms struct */
214     prop_atoms_start = (Atom*)&prop_atoms;
215     wm_supported_pos = (Atom*)&(prop_atoms.net_supported);
216     num_support = sizeof(prop_atoms) / sizeof(Atom) -
217         (wm_supported_pos - prop_atoms_start) - 1;
218     i = 0;
219     supported = g_new(gulong, num_support);
220     supported[i++] = prop_atoms.net_supporting_wm_check;
221     supported[i++] = prop_atoms.net_wm_full_placement;
222     supported[i++] = prop_atoms.net_current_desktop;
223     supported[i++] = prop_atoms.net_number_of_desktops;
224     supported[i++] = prop_atoms.net_desktop_geometry;
225     supported[i++] = prop_atoms.net_desktop_viewport;
226     supported[i++] = prop_atoms.net_active_window;
227     supported[i++] = prop_atoms.net_workarea;
228     supported[i++] = prop_atoms.net_client_list;
229     supported[i++] = prop_atoms.net_client_list_stacking;
230     supported[i++] = prop_atoms.net_desktop_names;
231     supported[i++] = prop_atoms.net_close_window;
232     supported[i++] = prop_atoms.net_desktop_layout;
233     supported[i++] = prop_atoms.net_showing_desktop;
234     supported[i++] = prop_atoms.net_wm_name;
235     supported[i++] = prop_atoms.net_wm_visible_name;
236     supported[i++] = prop_atoms.net_wm_icon_name;
237     supported[i++] = prop_atoms.net_wm_visible_icon_name;
238     supported[i++] = prop_atoms.net_wm_desktop;
239     supported[i++] = prop_atoms.net_wm_strut;
240     supported[i++] = prop_atoms.net_wm_strut_partial;
241     supported[i++] = prop_atoms.net_wm_icon;
242     supported[i++] = prop_atoms.net_wm_icon_geometry;
243     supported[i++] = prop_atoms.net_wm_window_type;
244     supported[i++] = prop_atoms.net_wm_window_type_desktop;
245     supported[i++] = prop_atoms.net_wm_window_type_dock;
246     supported[i++] = prop_atoms.net_wm_window_type_toolbar;
247     supported[i++] = prop_atoms.net_wm_window_type_menu;
248     supported[i++] = prop_atoms.net_wm_window_type_utility;
249     supported[i++] = prop_atoms.net_wm_window_type_splash;
250     supported[i++] = prop_atoms.net_wm_window_type_dialog;
251     supported[i++] = prop_atoms.net_wm_window_type_normal;
252     supported[i++] = prop_atoms.net_wm_allowed_actions;
253     supported[i++] = prop_atoms.net_wm_action_move;
254     supported[i++] = prop_atoms.net_wm_action_resize;
255     supported[i++] = prop_atoms.net_wm_action_minimize;
256     supported[i++] = prop_atoms.net_wm_action_shade;
257     supported[i++] = prop_atoms.net_wm_action_maximize_horz;
258     supported[i++] = prop_atoms.net_wm_action_maximize_vert;
259     supported[i++] = prop_atoms.net_wm_action_fullscreen;
260     supported[i++] = prop_atoms.net_wm_action_change_desktop;
261     supported[i++] = prop_atoms.net_wm_action_close;
262     supported[i++] = prop_atoms.net_wm_action_above;
263     supported[i++] = prop_atoms.net_wm_action_below;
264     supported[i++] = prop_atoms.net_wm_state;
265     supported[i++] = prop_atoms.net_wm_state_modal;
266     supported[i++] = prop_atoms.net_wm_state_maximized_vert;
267     supported[i++] = prop_atoms.net_wm_state_maximized_horz;
268     supported[i++] = prop_atoms.net_wm_state_shaded;
269     supported[i++] = prop_atoms.net_wm_state_skip_taskbar;
270     supported[i++] = prop_atoms.net_wm_state_skip_pager;
271     supported[i++] = prop_atoms.net_wm_state_hidden;
272     supported[i++] = prop_atoms.net_wm_state_fullscreen;
273     supported[i++] = prop_atoms.net_wm_state_above;
274     supported[i++] = prop_atoms.net_wm_state_below;
275     supported[i++] = prop_atoms.net_wm_state_demands_attention;
276     supported[i++] = prop_atoms.net_moveresize_window;
277     supported[i++] = prop_atoms.net_wm_moveresize;
278     supported[i++] = prop_atoms.net_wm_user_time;
279 /*
280     supported[i++] = prop_atoms.net_wm_user_time_window;
281 */
282     supported[i++] = prop_atoms.net_frame_extents;
283     supported[i++] = prop_atoms.net_request_frame_extents;
284     supported[i++] = prop_atoms.net_restack_window;
285     supported[i++] = prop_atoms.net_startup_id;
286 #ifdef SYNC
287     supported[i++] = prop_atoms.net_wm_sync_request;
288     supported[i++] = prop_atoms.net_wm_sync_request_counter;
289 #endif
290     supported[i++] = prop_atoms.net_wm_pid;
291     supported[i++] = prop_atoms.net_wm_ping;
292
293     supported[i++] = prop_atoms.kde_wm_change_state;
294     supported[i++] = prop_atoms.kde_net_wm_frame_strut;
295     supported[i++] = prop_atoms.kde_net_wm_window_type_override;
296
297     supported[i++] = prop_atoms.ob_wm_action_undecorate;
298     supported[i++] = prop_atoms.ob_wm_state_undecorated;
299     supported[i++] = prop_atoms.openbox_pid;
300     supported[i++] = prop_atoms.ob_theme;
301     supported[i++] = prop_atoms.ob_control;
302     g_assert(i == num_support);
303
304     PROP_SETA32(RootWindow(ob_display, ob_screen),
305                 net_supported, atom, supported, num_support);
306     g_free(supported);
307
308     screen_tell_ksplash();
309
310     return TRUE;
311 }
312
313 static void screen_tell_ksplash(void)
314 {
315     XEvent e;
316     char **argv;
317
318     argv = g_new(gchar*, 6);
319     argv[0] = g_strdup("dcop");
320     argv[1] = g_strdup("ksplash");
321     argv[2] = g_strdup("ksplash");
322     argv[3] = g_strdup("upAndRunning(QString)");
323     argv[4] = g_strdup("wm started");
324     argv[5] = NULL;
325
326     /* tell ksplash through the dcop server command line interface */
327     g_spawn_async(NULL, argv, NULL,
328                   G_SPAWN_SEARCH_PATH | G_SPAWN_DO_NOT_REAP_CHILD |
329                   G_SPAWN_STDERR_TO_DEV_NULL | G_SPAWN_STDOUT_TO_DEV_NULL,
330                   NULL, NULL, NULL, NULL);
331     g_strfreev(argv);
332
333     /* i'm not sure why we do this, kwin does it, but ksplash doesn't seem to
334        hear it anyways. perhaps it is for old ksplash. or new ksplash. or
335        something. oh well. */
336     e.xclient.type = ClientMessage;
337     e.xclient.display = ob_display;
338     e.xclient.window = RootWindow(ob_display, ob_screen);
339     e.xclient.message_type =
340         XInternAtom(ob_display, "_KDE_SPLASH_PROGRESS", False );
341     e.xclient.format = 8;
342     strcpy(e.xclient.data.b, "wm started");
343     XSendEvent(ob_display, RootWindow(ob_display, ob_screen),
344                False, SubstructureNotifyMask, &e );
345 }
346
347 void screen_startup(gboolean reconfig)
348 {
349     gchar **names = NULL;
350     guint32 d;
351     gboolean namesexist = FALSE;
352
353     desktop_popup = pager_popup_new();
354     pager_popup_height(desktop_popup, POPUP_HEIGHT);
355
356     if (reconfig) {
357         /* update the pager popup's width */
358         pager_popup_text_width_to_strings(desktop_popup,
359                                           screen_desktop_names,
360                                           screen_num_desktops);
361         return;
362     }
363
364     /* get the initial size */
365     screen_resize();
366
367     /* have names already been set for the desktops? */
368     if (PROP_GETSS(RootWindow(ob_display, ob_screen),
369                    net_desktop_names, utf8, &names))
370     {
371         g_strfreev(names);
372         namesexist = TRUE;
373     }
374
375     /* if names don't exist and we have session names, set those.
376        do this stuff BEFORE setting the number of desktops, because that
377        will create default names for them
378     */
379     if (!namesexist && session_desktop_names != NULL) {
380         guint i, numnames;
381         GSList *it;
382
383         /* get the desktop names */
384         numnames = g_slist_length(session_desktop_names);
385         names = g_new(gchar*, numnames + 1);
386         names[numnames] = NULL;
387         for (i = 0, it = session_desktop_names; it; ++i, it = g_slist_next(it))
388             names[i] = g_strdup(it->data);
389
390         /* set the root window property */
391         PROP_SETSS(RootWindow(ob_display, ob_screen), net_desktop_names,names);
392
393         g_strfreev(names);
394     }
395
396     /* set the number of desktops, if it's not already set.
397
398        this will also set the default names from the config file up for
399        desktops that don't have names yet */
400     screen_num_desktops = 0;
401     if (PROP_GET32(RootWindow(ob_display, ob_screen),
402                    net_number_of_desktops, cardinal, &d))
403         screen_set_num_desktops(d);
404     /* restore from session if possible */
405     else if (session_num_desktops)
406         screen_set_num_desktops(session_num_desktops);
407     else
408         screen_set_num_desktops(config_desktops_num);
409
410     screen_desktop = screen_num_desktops;  /* something invalid */
411     /* start on the current desktop when a wm was already running */
412     if (PROP_GET32(RootWindow(ob_display, ob_screen),
413                    net_current_desktop, cardinal, &d) &&
414         d < screen_num_desktops)
415     {
416         screen_set_desktop(d, FALSE);
417     } else if (session_desktop >= 0)
418         screen_set_desktop(MIN((guint)session_desktop,
419                                screen_num_desktops), FALSE);
420     else
421         screen_set_desktop(MIN(config_screen_firstdesk,
422                                screen_num_desktops) - 1, FALSE);
423     screen_last_desktop = screen_desktop;
424
425     /* don't start in showing-desktop mode */
426     screen_showing_desktop = FALSE;
427     PROP_SET32(RootWindow(ob_display, ob_screen),
428                net_showing_desktop, cardinal, screen_showing_desktop);
429
430     if (session_desktop_layout_present &&
431         screen_validate_layout(&session_desktop_layout))
432     {
433         screen_desktop_layout = session_desktop_layout;
434     }
435     else
436         screen_update_layout();
437 }
438
439 void screen_shutdown(gboolean reconfig)
440 {
441     pager_popup_free(desktop_popup);
442
443     if (reconfig)
444         return;
445
446     XSelectInput(ob_display, RootWindow(ob_display, ob_screen),
447                  NoEventMask);
448
449     /* we're not running here no more! */
450     PROP_ERASE(RootWindow(ob_display, ob_screen), openbox_pid);
451     /* not without us */
452     PROP_ERASE(RootWindow(ob_display, ob_screen), net_supported);
453     /* don't keep this mode */
454     PROP_ERASE(RootWindow(ob_display, ob_screen), net_showing_desktop);
455
456     XDestroyWindow(ob_display, screen_support_win);
457
458     g_strfreev(screen_desktop_names);
459     screen_desktop_names = NULL;
460 }
461
462 void screen_resize(void)
463 {
464     static gint oldw = 0, oldh = 0;
465     gint w, h;
466     GList *it;
467     gulong geometry[2];
468
469     w = WidthOfScreen(ScreenOfDisplay(ob_display, ob_screen));
470     h = HeightOfScreen(ScreenOfDisplay(ob_display, ob_screen));
471
472     if (w == oldw && h == oldh) return;
473
474     oldw = w; oldh = h;
475
476     /* Set the _NET_DESKTOP_GEOMETRY hint */
477     screen_physical_size.width = geometry[0] = w;
478     screen_physical_size.height = geometry[1] = h;
479     PROP_SETA32(RootWindow(ob_display, ob_screen),
480                 net_desktop_geometry, cardinal, geometry, 2);
481
482     if (ob_state() == OB_STATE_STARTING)
483         return;
484
485     screen_update_areas();
486     dock_configure();
487
488     for (it = client_list; it; it = g_list_next(it))
489         client_move_onscreen(it->data, FALSE);
490 }
491
492 void screen_set_num_desktops(guint num)
493 {
494     guint old;
495     gulong *viewport;
496     GList *it, *stacking_copy;
497
498     g_assert(num > 0);
499
500     if (screen_num_desktops == num) return;
501
502     old = screen_num_desktops;
503     screen_num_desktops = num;
504     PROP_SET32(RootWindow(ob_display, ob_screen),
505                net_number_of_desktops, cardinal, num);
506
507     /* set the viewport hint */
508     viewport = g_new0(gulong, num * 2);
509     PROP_SETA32(RootWindow(ob_display, ob_screen),
510                 net_desktop_viewport, cardinal, viewport, num * 2);
511     g_free(viewport);
512
513     /* the number of rows/columns will differ */
514     screen_update_layout();
515
516     /* move windows on desktops that will no longer exist!
517        make a copy of the list cuz we're changing it */
518     stacking_copy = g_list_copy(stacking_list);
519     for (it = g_list_last(stacking_copy); it; it = g_list_previous(it)) {
520         if (WINDOW_IS_CLIENT(it->data)) {
521             ObClient *c = it->data;
522             if (c->desktop != DESKTOP_ALL && c->desktop >= num)
523                 client_set_desktop(c, num - 1, FALSE, TRUE);
524             /* raise all the windows that are on the current desktop which
525                is being merged */
526             else if (screen_desktop == num - 1 &&
527                      (c->desktop == DESKTOP_ALL ||
528                       c->desktop == screen_desktop))
529                 stacking_raise(CLIENT_AS_WINDOW(c));
530         }
531     }
532
533     /* change our struts/area to match (after moving windows) */
534     screen_update_areas();
535
536     /* may be some unnamed desktops that we need to fill in with names
537      (after updating the areas so the popup can resize) */
538     screen_update_desktop_names();
539
540     /* change our desktop if we're on one that no longer exists! */
541     if (screen_desktop >= screen_num_desktops)
542         screen_set_desktop(num - 1, TRUE);
543 }
544
545 static void screen_fallback_focus(void)
546 {
547     ObClient *c;
548     gboolean allow_omni;
549
550     /* only allow omnipresent windows to get focus on desktop change if
551        an omnipresent window is already focused (it'll keep focus probably, but
552        maybe not depending on mouse-focus options) */
553     allow_omni = focus_client && (client_normal(focus_client) &&
554                                   focus_client->desktop == DESKTOP_ALL);
555
556     /* the client moved there already so don't move focus. prevent flicker
557        on sendtodesktop + follow */
558     if (focus_client && focus_client->desktop == screen_desktop)
559         return;
560
561     /* have to try focus here because when you leave an empty desktop
562        there is no focus out to watch for. also, we have different rules
563        here. we always allow it to look under the mouse pointer if
564        config_focus_last is FALSE
565
566        do this before hiding the windows so if helper windows are coming
567        with us, they don't get hidden
568     */
569     if ((c = focus_fallback(TRUE, !config_focus_last, allow_omni,
570                             !allow_omni)))
571     {
572         /* only do the flicker reducing stuff ahead of time if we are going
573            to call xsetinputfocus on the window ourselves. otherwise there is
574            no guarantee the window will actually take focus.. */
575         if (c->can_focus) {
576             /* reduce flicker by hiliting now rather than waiting for the
577                server FocusIn event */
578             frame_adjust_focus(c->frame, TRUE);
579             /* do this here so that if you switch desktops to a window with
580                helper windows then the helper windows won't flash */
581             client_bring_helper_windows(c);
582         }
583     }
584 }
585
586 static gboolean last_desktop_func(gpointer data)
587 {
588     screen_desktop_timeout = TRUE;
589     return FALSE;
590 }
591
592 void screen_set_desktop(guint num, gboolean dofocus)
593 {
594     GList *it;
595     guint previous;
596     gulong ignore_start;
597
598     g_assert(num < screen_num_desktops);
599
600     previous = screen_desktop;
601     screen_desktop = num;
602
603     if (previous == num) return;
604
605     PROP_SET32(RootWindow(ob_display, ob_screen),
606                net_current_desktop, cardinal, num);
607
608     /* This whole thing decides when/how to save the screen_last_desktop so
609        that it can be restored later if you want */
610     if (screen_desktop_timeout) {
611         /* If screen_desktop_timeout is true, then we've been on this desktop
612            long enough and we can save it as the last desktop. */
613
614         /* save the "last desktop" as the "old desktop" */
615         screen_old_desktop = screen_last_desktop;
616         /* save the desktop we're coming from as the "last desktop" */
617         screen_last_desktop = previous;
618     }
619     else {
620         /* If screen_desktop_timeout is false, then we just got to this desktop
621            and we are moving away again. */
622
623         if (screen_desktop == screen_last_desktop) {
624             /* If we are moving to the "last desktop" .. */
625             if (previous == screen_old_desktop) {
626                 /* .. from the "old desktop", change the last desktop to
627                    be where we are coming from */
628                 screen_last_desktop = screen_old_desktop;
629             }
630             else if (screen_last_desktop == screen_old_desktop) {
631                 /* .. and also to the "old desktop", change the "last
632                    desktop" to be where we are coming from */
633                 screen_last_desktop = previous;
634             }
635             else {
636                 /* .. from some other desktop, then set the "last desktop" to
637                    be the saved "old desktop", i.e. where we were before the
638                    "last desktop" */
639                 screen_last_desktop = screen_old_desktop;
640             }
641         }
642         else {
643             /* If we are moving to any desktop besides the "last desktop"..
644                (this is the normal case) */
645             if (screen_desktop == screen_old_desktop) {
646                 /* If moving to the "old desktop", which is not the
647                    "last desktop", don't save anything */
648             }
649             else if (previous == screen_old_desktop) {
650                 /* If moving from the "old desktop", and not to the
651                    "last desktop", don't save anything */
652             }
653             else if (screen_last_desktop == screen_old_desktop) {
654                 /* If the "last desktop" is the same as "old desktop" and
655                    you're not moving to the "last desktop" then save where
656                    we're coming from as the "last desktop" */
657                 screen_last_desktop = previous;
658             }
659             else {
660                 /* If the "last desktop" is different from the "old desktop"
661                    and you're not moving to the "last desktop", then don't save
662                    anything */
663             }
664         }
665     }
666     screen_desktop_timeout = FALSE;
667     ob_main_loop_timeout_remove(ob_main_loop, last_desktop_func);
668     ob_main_loop_timeout_add(ob_main_loop, REMEMBER_LAST_DESKTOP_TIME,
669                              last_desktop_func, NULL, NULL, NULL);
670
671     ob_debug("Moving to desktop %d\n", num+1);
672
673     /* ignore enter events caused by the move */
674     ignore_start = event_start_ignore_all_enters();
675
676     if (moveresize_client)
677         client_set_desktop(moveresize_client, num, TRUE, FALSE);
678
679     /* show windows before hiding the rest to lessen the enter/leave events */
680
681     /* show windows from top to bottom */
682     for (it = stacking_list; it; it = g_list_next(it)) {
683         if (WINDOW_IS_CLIENT(it->data)) {
684             ObClient *c = it->data;
685             client_show(c);
686         }
687     }
688
689     if (dofocus) screen_fallback_focus();
690
691     /* hide windows from bottom to top */
692     for (it = g_list_last(stacking_list); it; it = g_list_previous(it)) {
693         if (WINDOW_IS_CLIENT(it->data)) {
694             ObClient *c = it->data;
695             client_hide(c);
696         }
697     }
698
699     event_end_ignore_all_enters(ignore_start);
700
701     if (event_curtime != CurrentTime)
702         screen_desktop_user_time = event_curtime;
703
704     if (ob_state() == OB_STATE_RUNNING)
705         screen_show_desktop_popup(screen_desktop);
706 }
707
708 void screen_add_desktop(gboolean current)
709 {
710     gulong ignore_start;
711
712     /* ignore enter events caused by this */
713     ignore_start = event_start_ignore_all_enters();
714
715     screen_set_num_desktops(screen_num_desktops+1);
716
717     /* move all the clients over */
718     if (current) {
719         GList *it;
720
721         for (it = client_list; it; it = g_list_next(it)) {
722             ObClient *c = it->data;
723             if (c->desktop != DESKTOP_ALL && c->desktop >= screen_desktop &&
724                 /* don't move direct children, they'll be moved with their
725                    parent - which will have to be on the same desktop */
726                 !client_direct_parent(c))
727             {
728                 ob_debug("moving window %s\n", c->title);
729                 client_set_desktop(c, c->desktop+1, FALSE, TRUE);
730             }
731         }
732     }
733
734     event_end_ignore_all_enters(ignore_start);
735 }
736
737 void screen_remove_desktop(gboolean current)
738 {
739     guint rmdesktop, movedesktop;
740     GList *it, *stacking_copy;
741     gulong ignore_start;
742
743     if (screen_num_desktops <= 1) return;
744
745     /* ignore enter events caused by this */
746     ignore_start = event_start_ignore_all_enters();
747
748     /* what desktop are we removing and moving to? */
749     if (current)
750         rmdesktop = screen_desktop;
751     else
752         rmdesktop = screen_num_desktops - 1;
753     if (rmdesktop < screen_num_desktops - 1)
754         movedesktop = rmdesktop + 1;
755     else
756         movedesktop = rmdesktop;
757
758     /* make a copy of the list cuz we're changing it */
759     stacking_copy = g_list_copy(stacking_list);
760     for (it = g_list_last(stacking_copy); it; it = g_list_previous(it)) {
761         if (WINDOW_IS_CLIENT(it->data)) {
762             ObClient *c = it->data;
763             guint d = c->desktop;
764             if (d != DESKTOP_ALL && d >= movedesktop &&
765                 /* don't move direct children, they'll be moved with their
766                    parent - which will have to be on the same desktop */
767                 !client_direct_parent(c))
768             {
769                 ob_debug("moving window %s\n", c->title);
770                 client_set_desktop(c, c->desktop - 1, TRUE, TRUE);
771             }
772             /* raise all the windows that are on the current desktop which
773                is being merged */
774             if ((screen_desktop == rmdesktop - 1 ||
775                  screen_desktop == rmdesktop) &&
776                 (d == DESKTOP_ALL || d == screen_desktop))
777             {
778                 stacking_raise(CLIENT_AS_WINDOW(c));
779                 ob_debug("raising window %s\n", c->title);
780             }
781         }
782     }
783
784     /* fallback focus like we're changing desktops */
785     if (screen_desktop < screen_num_desktops - 1) {
786         screen_fallback_focus();
787         ob_debug("fake desktop change\n");
788     }
789
790     screen_set_num_desktops(screen_num_desktops-1);
791
792     event_end_ignore_all_enters(ignore_start);
793 }
794
795 static void get_row_col(guint d, guint *r, guint *c)
796 {
797     switch (screen_desktop_layout.orientation) {
798     case OB_ORIENTATION_HORZ:
799         switch (screen_desktop_layout.start_corner) {
800         case OB_CORNER_TOPLEFT:
801             *r = d / screen_desktop_layout.columns;
802             *c = d % screen_desktop_layout.columns;
803             break;
804         case OB_CORNER_BOTTOMLEFT:
805             *r = screen_desktop_layout.rows - 1 -
806                 d / screen_desktop_layout.columns;
807             *c = d % screen_desktop_layout.columns;
808             break;
809         case OB_CORNER_TOPRIGHT:
810             *r = d / screen_desktop_layout.columns;
811             *c = screen_desktop_layout.columns - 1 -
812                 d % screen_desktop_layout.columns;
813             break;
814         case OB_CORNER_BOTTOMRIGHT:
815             *r = screen_desktop_layout.rows - 1 -
816                 d / screen_desktop_layout.columns;
817             *c = screen_desktop_layout.columns - 1 -
818                 d % screen_desktop_layout.columns;
819             break;
820         }
821         break;
822     case OB_ORIENTATION_VERT:
823         switch (screen_desktop_layout.start_corner) {
824         case OB_CORNER_TOPLEFT:
825             *r = d % screen_desktop_layout.rows;
826             *c = d / screen_desktop_layout.rows;
827             break;
828         case OB_CORNER_BOTTOMLEFT:
829             *r = screen_desktop_layout.rows - 1 -
830                 d % screen_desktop_layout.rows;
831             *c = d / screen_desktop_layout.rows;
832             break;
833         case OB_CORNER_TOPRIGHT:
834             *r = d % screen_desktop_layout.rows;
835             *c = screen_desktop_layout.columns - 1 -
836                 d / screen_desktop_layout.rows;
837             break;
838         case OB_CORNER_BOTTOMRIGHT:
839             *r = screen_desktop_layout.rows - 1 -
840                 d % screen_desktop_layout.rows;
841             *c = screen_desktop_layout.columns - 1 -
842                 d / screen_desktop_layout.rows;
843             break;
844         }
845         break;
846     }
847 }
848
849 static guint translate_row_col(guint r, guint c)
850 {
851     switch (screen_desktop_layout.orientation) {
852     case OB_ORIENTATION_HORZ:
853         switch (screen_desktop_layout.start_corner) {
854         case OB_CORNER_TOPLEFT:
855             return r % screen_desktop_layout.rows *
856                 screen_desktop_layout.columns +
857                 c % screen_desktop_layout.columns;
858         case OB_CORNER_BOTTOMLEFT:
859             return (screen_desktop_layout.rows - 1 -
860                     r % screen_desktop_layout.rows) *
861                 screen_desktop_layout.columns +
862                 c % screen_desktop_layout.columns;
863         case OB_CORNER_TOPRIGHT:
864             return r % screen_desktop_layout.rows *
865                 screen_desktop_layout.columns +
866                 (screen_desktop_layout.columns - 1 -
867                  c % screen_desktop_layout.columns);
868         case OB_CORNER_BOTTOMRIGHT:
869             return (screen_desktop_layout.rows - 1 -
870                     r % screen_desktop_layout.rows) *
871                 screen_desktop_layout.columns +
872                 (screen_desktop_layout.columns - 1 -
873                  c % screen_desktop_layout.columns);
874         }
875     case OB_ORIENTATION_VERT:
876         switch (screen_desktop_layout.start_corner) {
877         case OB_CORNER_TOPLEFT:
878             return c % screen_desktop_layout.columns *
879                 screen_desktop_layout.rows +
880                 r % screen_desktop_layout.rows;
881         case OB_CORNER_BOTTOMLEFT:
882             return c % screen_desktop_layout.columns *
883                 screen_desktop_layout.rows +
884                 (screen_desktop_layout.rows - 1 -
885                  r % screen_desktop_layout.rows);
886         case OB_CORNER_TOPRIGHT:
887             return (screen_desktop_layout.columns - 1 -
888                     c % screen_desktop_layout.columns) *
889                 screen_desktop_layout.rows +
890                 r % screen_desktop_layout.rows;
891         case OB_CORNER_BOTTOMRIGHT:
892             return (screen_desktop_layout.columns - 1 -
893                     c % screen_desktop_layout.columns) *
894                 screen_desktop_layout.rows +
895                 (screen_desktop_layout.rows - 1 -
896                  r % screen_desktop_layout.rows);
897         }
898     }
899     g_assert_not_reached();
900     return 0;
901 }
902
903 static gboolean hide_desktop_popup_func(gpointer data)
904 {
905     pager_popup_hide(desktop_popup);
906     return FALSE; /* don't repeat */
907 }
908
909 void screen_show_desktop_popup(guint d)
910 {
911     Rect *a;
912
913     /* 0 means don't show the popup */
914     if (!config_desktop_popup_time) return;
915
916     a = screen_physical_area_active();
917     pager_popup_position(desktop_popup, CenterGravity,
918                          a->x + a->width / 2, a->y + a->height / 2);
919     pager_popup_icon_size_multiplier(desktop_popup,
920                                      (screen_desktop_layout.columns /
921                                       screen_desktop_layout.rows) / 2,
922                                      (screen_desktop_layout.rows/
923                                       screen_desktop_layout.columns) / 2);
924     pager_popup_max_width(desktop_popup,
925                           MAX(a->width/3, POPUP_WIDTH));
926     pager_popup_show(desktop_popup, screen_desktop_names[d], d);
927
928     ob_main_loop_timeout_remove(ob_main_loop, hide_desktop_popup_func);
929     ob_main_loop_timeout_add(ob_main_loop, config_desktop_popup_time * 1000,
930                              hide_desktop_popup_func, NULL, NULL, NULL);
931     g_free(a);
932 }
933
934 void screen_hide_desktop_popup(void)
935 {
936     ob_main_loop_timeout_remove(ob_main_loop, hide_desktop_popup_func);
937     pager_popup_hide(desktop_popup);
938 }
939
940 guint screen_find_desktop(guint from, ObDirection dir,
941                           gboolean wrap, gboolean linear)
942 {
943     guint r, c;
944     guint d;
945
946     d = from;
947     get_row_col(d, &r, &c);
948     if (linear) {
949         switch (dir) {
950         case OB_DIRECTION_EAST:
951             if (d < screen_num_desktops - 1)
952                 ++d;
953             else if (wrap)
954                 d = 0;
955             else
956                 return from;
957             break;
958         case OB_DIRECTION_WEST:
959             if (d > 0)
960                 --d;
961             else if (wrap)
962                 d = screen_num_desktops - 1;
963             else
964                 return from;
965             break;
966         default:
967             g_assert_not_reached();
968             return from;
969         }
970     } else {
971         switch (dir) {
972         case OB_DIRECTION_EAST:
973             ++c;
974             if (c >= screen_desktop_layout.columns) {
975                 if (wrap)
976                     c = 0;
977                 else
978                     return from;
979             }
980             d = translate_row_col(r, c);
981             if (d >= screen_num_desktops) {
982                 if (wrap)
983                     ++c;
984                 else
985                     return from;
986             }
987             break;
988         case OB_DIRECTION_WEST:
989             --c;
990             if (c >= screen_desktop_layout.columns) {
991                 if (wrap)
992                     c = screen_desktop_layout.columns - 1;
993                 else
994                     return from;
995             }
996             d = translate_row_col(r, c);
997             if (d >= screen_num_desktops) {
998                 if (wrap)
999                     --c;
1000                 else
1001                     return from;
1002             }
1003             break;
1004         case OB_DIRECTION_SOUTH:
1005             ++r;
1006             if (r >= screen_desktop_layout.rows) {
1007                 if (wrap)
1008                     r = 0;
1009                 else
1010                     return from;
1011             }
1012             d = translate_row_col(r, c);
1013             if (d >= screen_num_desktops) {
1014                 if (wrap)
1015                     ++r;
1016                 else
1017                     return from;
1018             }
1019             break;
1020         case OB_DIRECTION_NORTH:
1021             --r;
1022             if (r >= screen_desktop_layout.rows) {
1023                 if (wrap)
1024                     r = screen_desktop_layout.rows - 1;
1025                 else
1026                     return from;
1027             }
1028             d = translate_row_col(r, c);
1029             if (d >= screen_num_desktops) {
1030                 if (wrap)
1031                     --r;
1032                 else
1033                     return from;
1034             }
1035             break;
1036         default:
1037             g_assert_not_reached();
1038             return from;
1039         }
1040
1041         d = translate_row_col(r, c);
1042     }
1043     return d;
1044 }
1045
1046 static gboolean screen_validate_layout(ObDesktopLayout *l)
1047 {
1048     if (l->columns == 0 && l->rows == 0) /* both 0's is bad data.. */
1049         return FALSE;
1050
1051     /* fill in a zero rows/columns */
1052     if (l->columns == 0) {
1053         l->columns = screen_num_desktops / l->rows;
1054         if (l->rows * l->columns < screen_num_desktops)
1055             l->columns++;
1056         if (l->rows * l->columns >= screen_num_desktops + l->columns)
1057             l->rows--;
1058     } else if (l->rows == 0) {
1059         l->rows = screen_num_desktops / l->columns;
1060         if (l->columns * l->rows < screen_num_desktops)
1061             l->rows++;
1062         if (l->columns * l->rows >= screen_num_desktops + l->rows)
1063             l->columns--;
1064     }
1065
1066     /* bounds checking */
1067     if (l->orientation == OB_ORIENTATION_HORZ) {
1068         l->columns = MIN(screen_num_desktops, l->columns);
1069         l->rows = MIN(l->rows,
1070                       (screen_num_desktops + l->columns - 1) / l->columns);
1071         l->columns = screen_num_desktops / l->rows +
1072             !!(screen_num_desktops % l->rows);
1073     } else {
1074         l->rows = MIN(screen_num_desktops, l->rows);
1075         l->columns = MIN(l->columns,
1076                          (screen_num_desktops + l->rows - 1) / l->rows);
1077         l->rows = screen_num_desktops / l->columns +
1078             !!(screen_num_desktops % l->columns);
1079     }
1080     return TRUE;
1081 }
1082
1083 void screen_update_layout(void)
1084
1085 {
1086     ObDesktopLayout l;
1087     guint32 *data;
1088     guint num;
1089
1090     screen_desktop_layout.orientation = OB_ORIENTATION_HORZ;
1091     screen_desktop_layout.start_corner = OB_CORNER_TOPLEFT;
1092     screen_desktop_layout.rows = 1;
1093     screen_desktop_layout.columns = screen_num_desktops;
1094
1095     if (PROP_GETA32(RootWindow(ob_display, ob_screen),
1096                     net_desktop_layout, cardinal, &data, &num)) {
1097         if (num == 3 || num == 4) {
1098
1099             if (data[0] == prop_atoms.net_wm_orientation_vert)
1100                 l.orientation = OB_ORIENTATION_VERT;
1101             else if (data[0] == prop_atoms.net_wm_orientation_horz)
1102                 l.orientation = OB_ORIENTATION_HORZ;
1103             else
1104                 return;
1105
1106             if (num < 4)
1107                 l.start_corner = OB_CORNER_TOPLEFT;
1108             else {
1109                 if (data[3] == prop_atoms.net_wm_topleft)
1110                     l.start_corner = OB_CORNER_TOPLEFT;
1111                 else if (data[3] == prop_atoms.net_wm_topright)
1112                     l.start_corner = OB_CORNER_TOPRIGHT;
1113                 else if (data[3] == prop_atoms.net_wm_bottomright)
1114                     l.start_corner = OB_CORNER_BOTTOMRIGHT;
1115                 else if (data[3] == prop_atoms.net_wm_bottomleft)
1116                     l.start_corner = OB_CORNER_BOTTOMLEFT;
1117                 else
1118                     return;
1119             }
1120
1121             l.columns = data[1];
1122             l.rows = data[2];
1123
1124             if (screen_validate_layout(&l))
1125                 screen_desktop_layout = l;
1126
1127             g_free(data);
1128         }
1129     }
1130 }
1131
1132 void screen_update_desktop_names(void)
1133 {
1134     guint i;
1135
1136     /* empty the array */
1137     g_strfreev(screen_desktop_names);
1138     screen_desktop_names = NULL;
1139
1140     if (PROP_GETSS(RootWindow(ob_display, ob_screen),
1141                    net_desktop_names, utf8, &screen_desktop_names))
1142         for (i = 0; screen_desktop_names[i] && i < screen_num_desktops; ++i);
1143     else
1144         i = 0;
1145     if (i < screen_num_desktops) {
1146         GSList *it;
1147
1148         screen_desktop_names = g_renew(gchar*, screen_desktop_names,
1149                                        screen_num_desktops + 1);
1150         screen_desktop_names[screen_num_desktops] = NULL;
1151
1152         it = g_slist_nth(config_desktops_names, i);
1153
1154         for (; i < screen_num_desktops; ++i) {
1155             if (it && ((char*)it->data)[0]) /* not empty */
1156                 /* use the names from the config file when possible */
1157                 screen_desktop_names[i] = g_strdup(it->data);
1158             else
1159                 /* make up a nice name if it's not though */
1160                 screen_desktop_names[i] = g_strdup_printf(_("desktop %i"),
1161                                                           i + 1);
1162             if (it) it = g_slist_next(it);
1163         }
1164
1165         /* if we changed any names, then set the root property so we can
1166            all agree on the names */
1167         PROP_SETSS(RootWindow(ob_display, ob_screen), net_desktop_names,
1168                    screen_desktop_names);
1169     }
1170
1171     /* resize the pager for these names */
1172     pager_popup_text_width_to_strings(desktop_popup,
1173                                       screen_desktop_names,
1174                                       screen_num_desktops);
1175 }
1176
1177 void screen_show_desktop(gboolean show, ObClient *show_only)
1178 {
1179     GList *it;
1180
1181     if (show == screen_showing_desktop) return; /* no change */
1182
1183     screen_showing_desktop = show;
1184
1185     if (show) {
1186         /* hide windows bottom to top */
1187         for (it = g_list_last(stacking_list); it; it = g_list_previous(it)) {
1188             if (WINDOW_IS_CLIENT(it->data)) {
1189                 ObClient *client = it->data;
1190                 client_showhide(client);
1191             }
1192         }
1193     }
1194     else {
1195         /* restore windows top to bottom */
1196         for (it = stacking_list; it; it = g_list_next(it)) {
1197             if (WINDOW_IS_CLIENT(it->data)) {
1198                 ObClient *client = it->data;
1199                 if (client_should_show(client)) {
1200                     if (!show_only || client == show_only)
1201                         client_show(client);
1202                     else
1203                         client_iconify(client, TRUE, FALSE, TRUE);
1204                 }
1205             }
1206         }
1207     }
1208
1209     if (show) {
1210         /* focus the desktop */
1211         for (it = focus_order; it; it = g_list_next(it)) {
1212             ObClient *c = it->data;
1213             if (c->type == OB_CLIENT_TYPE_DESKTOP &&
1214                 (c->desktop == screen_desktop || c->desktop == DESKTOP_ALL) &&
1215                 client_focus(it->data))
1216                 break;
1217         }
1218     }
1219     else if (!show_only) {
1220         ObClient *c;
1221
1222         if ((c = focus_fallback(TRUE, FALSE, TRUE, FALSE))) {
1223             /* only do the flicker reducing stuff ahead of time if we are going
1224                to call xsetinputfocus on the window ourselves. otherwise there
1225                is no guarantee the window will actually take focus.. */
1226             if (c->can_focus) {
1227                 /* reduce flicker by hiliting now rather than waiting for the
1228                    server FocusIn event */
1229                 frame_adjust_focus(c->frame, TRUE);
1230             }
1231         }
1232     }
1233
1234     show = !!show; /* make it boolean */
1235     PROP_SET32(RootWindow(ob_display, ob_screen),
1236                net_showing_desktop, cardinal, show);
1237 }
1238
1239 void screen_install_colormap(ObClient *client, gboolean install)
1240 {
1241     if (client == NULL || client->colormap == None) {
1242         if (install)
1243             XInstallColormap(RrDisplay(ob_rr_inst), RrColormap(ob_rr_inst));
1244         else
1245             XUninstallColormap(RrDisplay(ob_rr_inst), RrColormap(ob_rr_inst));
1246     } else {
1247         obt_display_ignore_errors(ob_display, TRUE);
1248         if (install)
1249             XInstallColormap(RrDisplay(ob_rr_inst), client->colormap);
1250         else
1251             XUninstallColormap(RrDisplay(ob_rr_inst), client->colormap);
1252         obt_display_ignore_errors(ob_display, FALSE);
1253     }
1254 }
1255
1256 #define STRUT_LEFT_ON_MONITOR(s, i) \
1257     (RANGES_INTERSECT(s->left_start, s->left_end - s->left_start + 1, \
1258                       monitor_area[i].y, monitor_area[i].height))
1259 #define STRUT_RIGHT_ON_MONITOR(s, i) \
1260     (RANGES_INTERSECT(s->right_start, s->right_end - s->right_start + 1, \
1261                       monitor_area[i].y, monitor_area[i].height))
1262 #define STRUT_TOP_ON_MONITOR(s, i) \
1263     (RANGES_INTERSECT(s->top_start, s->top_end - s->top_start + 1, \
1264                       monitor_area[i].x, monitor_area[i].width))
1265 #define STRUT_BOTTOM_ON_MONITOR(s, i) \
1266     (RANGES_INTERSECT(s->bottom_start, s->bottom_end - s->bottom_start + 1, \
1267                       monitor_area[i].x, monitor_area[i].width))
1268
1269 typedef struct {
1270     guint desktop;
1271     StrutPartial *strut;
1272 } ObScreenStrut;
1273
1274 #define RESET_STRUT_LIST(sl) \
1275     (g_slist_free(sl), sl = NULL)
1276
1277 #define ADD_STRUT_TO_LIST(sl, d, s) \
1278 { \
1279     ObScreenStrut *ss = g_new(ObScreenStrut, 1); \
1280     ss->desktop = d; \
1281     ss->strut = s;  \
1282     sl = g_slist_prepend(sl, ss); \
1283 }
1284
1285 #define VALIDATE_STRUTS(sl, side, max) \
1286 { \
1287     GSList *it; \
1288     for (it = sl; it; it = g_slist_next(it)) { \
1289       ObScreenStrut *ss = it->data; \
1290       ss->strut->side = MIN(max, ss->strut->side); \
1291     } \
1292 }
1293
1294 void screen_update_areas(void)
1295 {
1296     guint i, j;
1297     gulong *dims;
1298     GList *it;
1299     GSList *sit;
1300
1301     g_free(monitor_area);
1302     extensions_xinerama_screens(&monitor_area, &screen_num_monitors);
1303
1304     /* set up the user-specified margins */
1305     config_margins.top_start = RECT_LEFT(monitor_area[screen_num_monitors]);
1306     config_margins.top_end = RECT_RIGHT(monitor_area[screen_num_monitors]);
1307     config_margins.bottom_start = RECT_LEFT(monitor_area[screen_num_monitors]);
1308     config_margins.bottom_end = RECT_RIGHT(monitor_area[screen_num_monitors]);
1309     config_margins.left_start = RECT_TOP(monitor_area[screen_num_monitors]);
1310     config_margins.left_end = RECT_BOTTOM(monitor_area[screen_num_monitors]);
1311     config_margins.right_start = RECT_TOP(monitor_area[screen_num_monitors]);
1312     config_margins.right_end = RECT_BOTTOM(monitor_area[screen_num_monitors]);
1313
1314     dims = g_new(gulong, 4 * screen_num_desktops * screen_num_monitors);
1315
1316     RESET_STRUT_LIST(struts_left);
1317     RESET_STRUT_LIST(struts_top);
1318     RESET_STRUT_LIST(struts_right);
1319     RESET_STRUT_LIST(struts_bottom);
1320
1321     /* collect the struts */
1322     for (it = client_list; it; it = g_list_next(it)) {
1323         ObClient *c = it->data;
1324         if (c->strut.left)
1325             ADD_STRUT_TO_LIST(struts_left, c->desktop, &c->strut);
1326         if (c->strut.top)
1327             ADD_STRUT_TO_LIST(struts_top, c->desktop, &c->strut);
1328         if (c->strut.right)
1329             ADD_STRUT_TO_LIST(struts_right, c->desktop, &c->strut);
1330         if (c->strut.bottom)
1331             ADD_STRUT_TO_LIST(struts_bottom, c->desktop, &c->strut);
1332     }
1333     if (dock_strut.left)
1334         ADD_STRUT_TO_LIST(struts_left, DESKTOP_ALL, &dock_strut);
1335     if (dock_strut.top)
1336         ADD_STRUT_TO_LIST(struts_top, DESKTOP_ALL, &dock_strut);
1337     if (dock_strut.right)
1338         ADD_STRUT_TO_LIST(struts_right, DESKTOP_ALL, &dock_strut);
1339     if (dock_strut.bottom)
1340         ADD_STRUT_TO_LIST(struts_bottom, DESKTOP_ALL, &dock_strut);
1341
1342     if (config_margins.left)
1343         ADD_STRUT_TO_LIST(struts_left, DESKTOP_ALL, &config_margins);
1344     if (config_margins.top)
1345         ADD_STRUT_TO_LIST(struts_top, DESKTOP_ALL, &config_margins);
1346     if (config_margins.right)
1347         ADD_STRUT_TO_LIST(struts_right, DESKTOP_ALL, &config_margins);
1348     if (config_margins.bottom)
1349         ADD_STRUT_TO_LIST(struts_bottom, DESKTOP_ALL, &config_margins);
1350
1351     VALIDATE_STRUTS(struts_left, left,
1352                     monitor_area[screen_num_monitors].width / 2);
1353     VALIDATE_STRUTS(struts_right, right,
1354                     monitor_area[screen_num_monitors].width / 2);
1355     VALIDATE_STRUTS(struts_top, top,
1356                     monitor_area[screen_num_monitors].height / 2);
1357     VALIDATE_STRUTS(struts_bottom, bottom,
1358                     monitor_area[screen_num_monitors].height / 2);
1359
1360     /* set up the work areas to be full screen */
1361     for (i = 0; i < screen_num_monitors; ++i)
1362         for (j = 0; j < screen_num_desktops; ++j) {
1363             dims[(i * screen_num_desktops + j) * 4+0] = monitor_area[i].x;
1364             dims[(i * screen_num_desktops + j) * 4+1] = monitor_area[i].y;
1365             dims[(i * screen_num_desktops + j) * 4+2] = monitor_area[i].width;
1366             dims[(i * screen_num_desktops + j) * 4+3] = monitor_area[i].height;
1367         }
1368
1369     /* calculate the work areas from the struts */
1370     for (i = 0; i < screen_num_monitors; ++i)
1371         for (j = 0; j < screen_num_desktops; ++j) {
1372             gint l = 0, r = 0, t = 0, b = 0;
1373
1374             /* only add the strut to the area if it touches the monitor */
1375
1376             for (sit = struts_left; sit; sit = g_slist_next(sit)) {
1377                 ObScreenStrut *s = sit->data;
1378                 if ((s->desktop == j || s->desktop == DESKTOP_ALL) &&
1379                     STRUT_LEFT_ON_MONITOR(s->strut, i))
1380                     l = MAX(l, s->strut->left);
1381             }
1382             for (sit = struts_top; sit; sit = g_slist_next(sit)) {
1383                 ObScreenStrut *s = sit->data;
1384                 if ((s->desktop == j || s->desktop == DESKTOP_ALL) &&
1385                     STRUT_TOP_ON_MONITOR(s->strut, i))
1386                     t = MAX(t, s->strut->top);
1387             }
1388             for (sit = struts_right; sit; sit = g_slist_next(sit)) {
1389                 ObScreenStrut *s = sit->data;
1390                 if ((s->desktop == j || s->desktop == DESKTOP_ALL) &&
1391                     STRUT_RIGHT_ON_MONITOR(s->strut, i))
1392                     r = MAX(r, s->strut->right);
1393             }
1394             for (sit = struts_bottom; sit; sit = g_slist_next(sit)) {
1395                 ObScreenStrut *s = sit->data;
1396                 if ((s->desktop == j || s->desktop == DESKTOP_ALL) &&
1397                     STRUT_BOTTOM_ON_MONITOR(s->strut, i))
1398                     b = MAX(b, s->strut->bottom);
1399             }
1400
1401             /* based on these margins, set the work area for the
1402                monitor/desktop */
1403             dims[(i * screen_num_desktops + j) * 4 + 0] += l;
1404             dims[(i * screen_num_desktops + j) * 4 + 1] += t;
1405             dims[(i * screen_num_desktops + j) * 4 + 2] -= l + r;
1406             dims[(i * screen_num_desktops + j) * 4 + 3] -= t + b;
1407         }
1408
1409     /* all the work areas are not used here, only the ones for the first
1410        monitor are */
1411     PROP_SETA32(RootWindow(ob_display, ob_screen), net_workarea, cardinal,
1412                 dims, 4 * screen_num_desktops);
1413
1414     /* the area has changed, adjust all the windows if they need it */
1415     for (it = client_list; it; it = g_list_next(it))
1416         client_reconfigure(it->data, FALSE);
1417
1418     g_free(dims);
1419 }
1420
1421 #if 0
1422 Rect* screen_area_all_monitors(guint desktop)
1423 {
1424     guint i;
1425     Rect *a;
1426
1427     a = screen_area_monitor(desktop, 0);
1428
1429     /* combine all the monitors together */
1430     for (i = 1; i < screen_num_monitors; ++i) {
1431         Rect *m = screen_area_monitor(desktop, i);
1432         gint l, r, t, b;
1433
1434         l = MIN(RECT_LEFT(*a), RECT_LEFT(*m));
1435         t = MIN(RECT_TOP(*a), RECT_TOP(*m));
1436         r = MAX(RECT_RIGHT(*a), RECT_RIGHT(*m));
1437         b = MAX(RECT_BOTTOM(*a), RECT_BOTTOM(*m));
1438
1439         RECT_SET(*a, l, t, r - l + 1, b - t + 1);
1440
1441         g_free(m);
1442     }
1443
1444     return a;
1445 }
1446 #endif
1447
1448 #define STRUT_LEFT_IN_SEARCH(s, search) \
1449     (RANGES_INTERSECT(search->y, search->height, \
1450                       s->left_start, s->left_end - s->left_start + 1))
1451 #define STRUT_RIGHT_IN_SEARCH(s, search) \
1452     (RANGES_INTERSECT(search->y, search->height, \
1453                       s->right_start, s->right_end - s->right_start + 1))
1454 #define STRUT_TOP_IN_SEARCH(s, search) \
1455     (RANGES_INTERSECT(search->x, search->width, \
1456                       s->top_start, s->top_end - s->top_start + 1))
1457 #define STRUT_BOTTOM_IN_SEARCH(s, search) \
1458     (RANGES_INTERSECT(search->x, search->width, \
1459                       s->bottom_start, s->bottom_end - s->bottom_start + 1))
1460
1461 #define STRUT_LEFT_IGNORE(s, us, search) \
1462     (head == SCREEN_AREA_ALL_MONITORS && us && \
1463      RECT_LEFT(monitor_area[i]) + s->left > RECT_LEFT(*search))
1464 #define STRUT_RIGHT_IGNORE(s, us, search) \
1465     (head == SCREEN_AREA_ALL_MONITORS && us && \
1466      RECT_RIGHT(monitor_area[i]) - s->right < RECT_RIGHT(*search))
1467 #define STRUT_TOP_IGNORE(s, us, search) \
1468     (head == SCREEN_AREA_ALL_MONITORS && us && \
1469      RECT_TOP(monitor_area[i]) + s->top > RECT_TOP(*search))
1470 #define STRUT_BOTTOM_IGNORE(s, us, search) \
1471     (head == SCREEN_AREA_ALL_MONITORS && us && \
1472      RECT_BOTTOM(monitor_area[i]) - s->bottom < RECT_BOTTOM(*search))
1473
1474 Rect* screen_area(guint desktop, guint head, Rect *search)
1475 {
1476     Rect *a;
1477     GSList *it;
1478     gint l, r, t, b, al, ar, at, ab;
1479     guint i, d;
1480     gboolean us = search != NULL; /* user provided search */
1481
1482     g_assert(desktop < screen_num_desktops || desktop == DESKTOP_ALL);
1483     g_assert(head < screen_num_monitors || head == SCREEN_AREA_ONE_MONITOR ||
1484              head == SCREEN_AREA_ALL_MONITORS);
1485     g_assert(!(head == SCREEN_AREA_ONE_MONITOR && search == NULL));
1486
1487     /* find any struts for this monitor
1488        which will be affecting the search area.
1489     */
1490
1491     /* search everything if search is null */
1492     if (!search) {
1493         if (head < screen_num_monitors) search = &monitor_area[head];
1494         else search = &monitor_area[screen_num_monitors];
1495     }
1496     if (head == SCREEN_AREA_ONE_MONITOR) head = screen_find_monitor(search);
1497
1498     /* al is "all left" meaning the furthest left you can get, l is our
1499        "working left" meaning our current strut edge which we're calculating
1500     */
1501
1502     /* only include monitors which the search area lines up with */
1503     if (RECT_INTERSECTS_RECT(monitor_area[screen_num_monitors], *search)) {
1504         al = l = RECT_RIGHT(monitor_area[screen_num_monitors]);
1505         at = t = RECT_BOTTOM(monitor_area[screen_num_monitors]);
1506         ar = r = RECT_LEFT(monitor_area[screen_num_monitors]);
1507         ab = b = RECT_TOP(monitor_area[screen_num_monitors]);
1508         for (i = 0; i < screen_num_monitors; ++i) {
1509             /* add the monitor if applicable */
1510             if (RANGES_INTERSECT(search->x, search->width,
1511                                  monitor_area[i].x, monitor_area[i].width))
1512             {
1513                 at = t = MIN(t, RECT_TOP(monitor_area[i]));
1514                 ab = b = MAX(b, RECT_BOTTOM(monitor_area[i]));
1515             }
1516             if (RANGES_INTERSECT(search->y, search->height,
1517                                  monitor_area[i].y, monitor_area[i].height))
1518             {
1519                 al = l = MIN(l, RECT_LEFT(monitor_area[i]));
1520                 ar = r = MAX(r, RECT_RIGHT(monitor_area[i]));
1521             }
1522         }
1523     } else {
1524         al = l = RECT_LEFT(monitor_area[screen_num_monitors]);
1525         at = t = RECT_TOP(monitor_area[screen_num_monitors]);
1526         ar = r = RECT_RIGHT(monitor_area[screen_num_monitors]);
1527         ab = b = RECT_BOTTOM(monitor_area[screen_num_monitors]);
1528     }
1529
1530     for (d = 0; d < screen_num_desktops; ++d) {
1531         if (d != desktop && desktop != DESKTOP_ALL) continue;
1532
1533         for (i = 0; i < screen_num_monitors; ++i) {
1534             if (head != SCREEN_AREA_ALL_MONITORS && head != i) continue;
1535
1536             for (it = struts_left; it; it = g_slist_next(it)) {
1537                 ObScreenStrut *s = it->data;
1538                 if ((s->desktop == d || s->desktop == DESKTOP_ALL) &&
1539                     STRUT_LEFT_IN_SEARCH(s->strut, search) &&
1540                     !STRUT_LEFT_IGNORE(s->strut, us, search))
1541                     l = MAX(l, al + s->strut->left);
1542             }
1543             for (it = struts_top; it; it = g_slist_next(it)) {
1544                 ObScreenStrut *s = it->data;
1545                 if ((s->desktop == d || s->desktop == DESKTOP_ALL) &&
1546                     STRUT_TOP_IN_SEARCH(s->strut, search) &&
1547                     !STRUT_TOP_IGNORE(s->strut, us, search))
1548                     t = MAX(t, at + s->strut->top);
1549             }
1550             for (it = struts_right; it; it = g_slist_next(it)) {
1551                 ObScreenStrut *s = it->data;
1552                 if ((s->desktop == d || s->desktop == DESKTOP_ALL) &&
1553                     STRUT_RIGHT_IN_SEARCH(s->strut, search) &&
1554                     !STRUT_RIGHT_IGNORE(s->strut, us, search))
1555                     r = MIN(r, ar - s->strut->right);
1556             }
1557             for (it = struts_bottom; it; it = g_slist_next(it)) {
1558                 ObScreenStrut *s = it->data;
1559                 if ((s->desktop == d || s->desktop == DESKTOP_ALL) &&
1560                     STRUT_BOTTOM_IN_SEARCH(s->strut, search) &&
1561                     !STRUT_BOTTOM_IGNORE(s->strut, us, search))
1562                     b = MIN(b, ab - s->strut->bottom);
1563             }
1564
1565             /* limit to this monitor */
1566             if (head == i) {
1567                 l = MAX(l, RECT_LEFT(monitor_area[i]));
1568                 t = MAX(t, RECT_TOP(monitor_area[i]));
1569                 r = MIN(r, RECT_RIGHT(monitor_area[i]));
1570                 b = MIN(b, RECT_BOTTOM(monitor_area[i]));
1571             }
1572         }
1573     }
1574
1575     a = g_new(Rect, 1);
1576     a->x = l;
1577     a->y = t;
1578     a->width = r - l + 1;
1579     a->height = b - t + 1;
1580     return a;
1581 }
1582
1583 guint screen_find_monitor(Rect *search)
1584 {
1585     guint i;
1586     guint most = screen_num_monitors;
1587     guint mostv = 0;
1588
1589     for (i = 0; i < screen_num_monitors; ++i) {
1590         Rect *area = screen_physical_area_monitor(i);
1591         if (RECT_INTERSECTS_RECT(*area, *search)) {
1592             Rect r;
1593             guint v;
1594
1595             RECT_SET_INTERSECTION(r, *area, *search);
1596             v = r.width * r.height;
1597
1598             if (v > mostv) {
1599                 mostv = v;
1600                 most = i;
1601             }
1602         }
1603         g_free(area);
1604     }
1605     return most;
1606 }
1607
1608 Rect* screen_physical_area_all_monitors(void)
1609 {
1610     return screen_physical_area_monitor(screen_num_monitors);
1611 }
1612
1613 Rect* screen_physical_area_monitor(guint head)
1614 {
1615     Rect *a;
1616     g_assert(head <= screen_num_monitors);
1617
1618     a = g_new(Rect, 1);
1619     *a = monitor_area[head];
1620     return a;
1621 }
1622
1623 gboolean screen_physical_area_monitor_contains(guint head, Rect *search)
1624 {
1625     g_assert(head <= screen_num_monitors);
1626     g_assert(search);
1627     return RECT_INTERSECTS_RECT(monitor_area[head], *search);
1628 }
1629
1630 Rect* screen_physical_area_active(void)
1631 {
1632     Rect *a;
1633     gint x, y;
1634
1635     if (moveresize_client)
1636         a = screen_physical_area_monitor(client_monitor(focus_client));
1637     else if (focus_client)
1638         a = screen_physical_area_monitor(client_monitor(focus_client));
1639     else {
1640         Rect mon;
1641         if (screen_pointer_pos(&x, &y))
1642             RECT_SET(mon, x, y, 1, 1);
1643         else
1644             RECT_SET(mon, 0, 0, 1, 1);
1645         a = screen_physical_area_monitor(screen_find_monitor(&mon));
1646     }
1647     return a;
1648 }
1649
1650 void screen_set_root_cursor(void)
1651 {
1652     if (sn_app_starting())
1653         XDefineCursor(ob_display, RootWindow(ob_display, ob_screen),
1654                       ob_cursor(OB_CURSOR_BUSYPOINTER));
1655     else
1656         XDefineCursor(ob_display, RootWindow(ob_display, ob_screen),
1657                       ob_cursor(OB_CURSOR_POINTER));
1658 }
1659
1660 gboolean screen_pointer_pos(gint *x, gint *y)
1661 {
1662     Window w;
1663     gint i;
1664     guint u;
1665     gboolean ret;
1666
1667     ret = !!XQueryPointer(ob_display, RootWindow(ob_display, ob_screen),
1668                           &w, &w, x, y, &i, &i, &u);
1669     if (!ret) {
1670         for (i = 0; i < ScreenCount(ob_display); ++i)
1671             if (i != ob_screen)
1672                 if (XQueryPointer(ob_display, RootWindow(ob_display, i),
1673                                   &w, &w, x, y, &i, &i, &u))
1674                     break;
1675     }
1676     return ret;
1677 }