use the moveresize client to find the active monitor too
[mikachu/openbox.git] / openbox / screen.c
1 /* -*- indent-tabs-mode: nil; tab-width: 4; c-basic-offset: 4; -*-
2
3    screen.c for the Openbox window manager
4    Copyright (c) 2006        Mikael Magnusson
5    Copyright (c) 2003-2007   Dana Jansens
6
7    This program is free software; you can redistribute it and/or modify
8    it under the terms of the GNU General Public License as published by
9    the Free Software Foundation; either version 2 of the License, or
10    (at your option) any later version.
11
12    This program is distributed in the hope that it will be useful,
13    but WITHOUT ANY WARRANTY; without even the implied warranty of
14    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
15    GNU General Public License for more details.
16
17    See the COPYING file for a copy of the GNU General Public License.
18 */
19
20 #include "debug.h"
21 #include "openbox.h"
22 #include "dock.h"
23 #include "xerror.h"
24 #include "prop.h"
25 #include "grab.h"
26 #include "startupnotify.h"
27 #include "moveresize.h"
28 #include "config.h"
29 #include "screen.h"
30 #include "client.h"
31 #include "session.h"
32 #include "frame.h"
33 #include "event.h"
34 #include "focus.h"
35 #include "popup.h"
36 #include "extensions.h"
37 #include "render/render.h"
38 #include "gettext.h"
39
40 #include <X11/Xlib.h>
41 #ifdef HAVE_UNISTD_H
42 #  include <sys/types.h>
43 #  include <unistd.h>
44 #endif
45 #include <assert.h>
46
47 /*! The event mask to grab on the root window */
48 #define ROOT_EVENTMASK (StructureNotifyMask | PropertyChangeMask | \
49                         EnterWindowMask | LeaveWindowMask | \
50                         SubstructureRedirectMask | FocusChangeMask | \
51                         ButtonPressMask | ButtonReleaseMask)
52
53 static gboolean screen_validate_layout(ObDesktopLayout *l);
54 static gboolean replace_wm();
55 static void     screen_tell_ksplash();
56
57 guint    screen_num_desktops;
58 guint    screen_num_monitors;
59 guint    screen_desktop;
60 guint    screen_last_desktop;
61 Size     screen_physical_size;
62 gboolean screen_showing_desktop;
63 ObDesktopLayout screen_desktop_layout;
64 gchar  **screen_desktop_names;
65 Window   screen_support_win;
66 Time     screen_desktop_user_time = CurrentTime;
67
68 /*! An array of desktops, holding array of areas per monitor */
69 static Rect  *monitor_area = NULL;
70 /*! An array of desktops, holding an array of struts */
71 static GSList *struts_top = NULL;
72 static GSList *struts_left = NULL;
73 static GSList *struts_right = NULL;
74 static GSList *struts_bottom = NULL;
75
76 static ObPagerPopup *desktop_cycle_popup;
77
78 static gboolean replace_wm()
79 {
80     gchar *wm_sn;
81     Atom wm_sn_atom;
82     Window current_wm_sn_owner;
83     Time timestamp;
84
85     wm_sn = g_strdup_printf("WM_S%d", ob_screen);
86     wm_sn_atom = XInternAtom(ob_display, wm_sn, FALSE);
87     g_free(wm_sn);
88
89     current_wm_sn_owner = XGetSelectionOwner(ob_display, wm_sn_atom);
90     if (current_wm_sn_owner == screen_support_win)
91         current_wm_sn_owner = None;
92     if (current_wm_sn_owner) {
93         if (!ob_replace_wm) {
94             g_message(_("A window manager is already running on screen %d"),
95                       ob_screen);
96             return FALSE;
97         }
98         xerror_set_ignore(TRUE);
99         xerror_occured = FALSE;
100
101         /* We want to find out when the current selection owner dies */
102         XSelectInput(ob_display, current_wm_sn_owner, StructureNotifyMask);
103         XSync(ob_display, FALSE);
104
105         xerror_set_ignore(FALSE);
106         if (xerror_occured)
107             current_wm_sn_owner = None;
108     }
109
110     {
111         /* Generate a timestamp */
112         XEvent event;
113
114         XSelectInput(ob_display, screen_support_win, PropertyChangeMask);
115
116         XChangeProperty(ob_display, screen_support_win,
117                         prop_atoms.wm_class, prop_atoms.string,
118                         8, PropModeAppend, NULL, 0);
119         XWindowEvent(ob_display, screen_support_win,
120                      PropertyChangeMask, &event);
121
122         XSelectInput(ob_display, screen_support_win, NoEventMask);
123
124         timestamp = event.xproperty.time;
125     }
126
127     XSetSelectionOwner(ob_display, wm_sn_atom, screen_support_win,
128                        timestamp);
129
130     if (XGetSelectionOwner(ob_display, wm_sn_atom) != screen_support_win) {
131         g_message(_("Could not acquire window manager selection on screen %d"),
132                   ob_screen);
133         return FALSE;
134     }
135
136     /* Wait for old window manager to go away */
137     if (current_wm_sn_owner) {
138       XEvent event;
139       gulong wait = 0;
140       const gulong timeout = G_USEC_PER_SEC * 15; /* wait for 15s max */
141
142       while (wait < timeout) {
143           if (XCheckWindowEvent(ob_display, current_wm_sn_owner,
144                                 StructureNotifyMask, &event) &&
145               event.type == DestroyNotify)
146               break;
147           g_usleep(G_USEC_PER_SEC / 10);
148           wait += G_USEC_PER_SEC / 10;
149       }
150
151       if (wait >= timeout) {
152           g_message(_("The WM on screen %d is not exiting"), ob_screen);
153           return FALSE;
154       }
155     }
156
157     /* Send client message indicating that we are now the WM */
158     prop_message(RootWindow(ob_display, ob_screen), prop_atoms.manager,
159                  timestamp, wm_sn_atom, screen_support_win, 0,
160                  SubstructureNotifyMask);
161
162     return TRUE;
163 }
164
165 gboolean screen_annex()
166 {
167     XSetWindowAttributes attrib;
168     pid_t pid;
169     gint i, num_support;
170     Atom *prop_atoms_start, *wm_supported_pos;
171     gulong *supported;
172
173     /* create the netwm support window */
174     attrib.override_redirect = TRUE;
175     screen_support_win = XCreateWindow(ob_display,
176                                        RootWindow(ob_display, ob_screen),
177                                        -100, -100, 1, 1, 0,
178                                        CopyFromParent, InputOutput,
179                                        CopyFromParent,
180                                        CWOverrideRedirect, &attrib);
181     XMapWindow(ob_display, screen_support_win);
182     XLowerWindow(ob_display, screen_support_win);
183
184     if (!replace_wm()) {
185         XDestroyWindow(ob_display, screen_support_win);
186         return FALSE;
187     }
188
189     xerror_set_ignore(TRUE);
190     xerror_occured = FALSE;
191     XSelectInput(ob_display, RootWindow(ob_display, ob_screen),
192                  ROOT_EVENTMASK);
193     xerror_set_ignore(FALSE);
194     if (xerror_occured) {
195         g_message(_("A window manager is already running on screen %d"),
196                   ob_screen);
197
198         XDestroyWindow(ob_display, screen_support_win);
199         return FALSE;
200     }
201
202     screen_set_root_cursor();
203
204     /* set the OPENBOX_PID hint */
205     pid = getpid();
206     PROP_SET32(RootWindow(ob_display, ob_screen),
207                openbox_pid, cardinal, pid);
208
209     /* set supporting window */
210     PROP_SET32(RootWindow(ob_display, ob_screen),
211                net_supporting_wm_check, window, screen_support_win);
212
213     /* set properties on the supporting window */
214     PROP_SETS(screen_support_win, net_wm_name, "Openbox");
215     PROP_SET32(screen_support_win, net_supporting_wm_check,
216                window, screen_support_win);
217
218     /* set the _NET_SUPPORTED_ATOMS hint */
219
220     /* this is all the atoms after net_supported in the prop_atoms struct */
221     prop_atoms_start = (Atom*)&prop_atoms;
222     wm_supported_pos = (Atom*)&(prop_atoms.net_supported);
223     num_support = sizeof(prop_atoms) / sizeof(Atom) -
224         (wm_supported_pos - prop_atoms_start) - 1;
225     i = 0;
226     supported = g_new(gulong, num_support);
227     supported[i++] = prop_atoms.net_supporting_wm_check;
228     supported[i++] = prop_atoms.net_wm_full_placement;
229     supported[i++] = prop_atoms.net_current_desktop;
230     supported[i++] = prop_atoms.net_number_of_desktops;
231     supported[i++] = prop_atoms.net_desktop_geometry;
232     supported[i++] = prop_atoms.net_desktop_viewport;
233     supported[i++] = prop_atoms.net_active_window;
234     supported[i++] = prop_atoms.net_workarea;
235     supported[i++] = prop_atoms.net_client_list;
236     supported[i++] = prop_atoms.net_client_list_stacking;
237     supported[i++] = prop_atoms.net_desktop_names;
238     supported[i++] = prop_atoms.net_close_window;
239     supported[i++] = prop_atoms.net_desktop_layout;
240     supported[i++] = prop_atoms.net_showing_desktop;
241     supported[i++] = prop_atoms.net_wm_name;
242     supported[i++] = prop_atoms.net_wm_visible_name;
243     supported[i++] = prop_atoms.net_wm_icon_name;
244     supported[i++] = prop_atoms.net_wm_visible_icon_name;
245     supported[i++] = prop_atoms.net_wm_desktop;
246     supported[i++] = prop_atoms.net_wm_strut;
247     supported[i++] = prop_atoms.net_wm_strut_partial;
248     supported[i++] = prop_atoms.net_wm_icon;
249     supported[i++] = prop_atoms.net_wm_icon_geometry;
250     supported[i++] = prop_atoms.net_wm_window_type;
251     supported[i++] = prop_atoms.net_wm_window_type_desktop;
252     supported[i++] = prop_atoms.net_wm_window_type_dock;
253     supported[i++] = prop_atoms.net_wm_window_type_toolbar;
254     supported[i++] = prop_atoms.net_wm_window_type_menu;
255     supported[i++] = prop_atoms.net_wm_window_type_utility;
256     supported[i++] = prop_atoms.net_wm_window_type_splash;
257     supported[i++] = prop_atoms.net_wm_window_type_dialog;
258     supported[i++] = prop_atoms.net_wm_window_type_normal;
259     supported[i++] = prop_atoms.net_wm_allowed_actions;
260     supported[i++] = prop_atoms.net_wm_action_move;
261     supported[i++] = prop_atoms.net_wm_action_resize;
262     supported[i++] = prop_atoms.net_wm_action_minimize;
263     supported[i++] = prop_atoms.net_wm_action_shade;
264     supported[i++] = prop_atoms.net_wm_action_maximize_horz;
265     supported[i++] = prop_atoms.net_wm_action_maximize_vert;
266     supported[i++] = prop_atoms.net_wm_action_fullscreen;
267     supported[i++] = prop_atoms.net_wm_action_change_desktop;
268     supported[i++] = prop_atoms.net_wm_action_close;
269     supported[i++] = prop_atoms.net_wm_action_above;
270     supported[i++] = prop_atoms.net_wm_action_below;
271     supported[i++] = prop_atoms.net_wm_state;
272     supported[i++] = prop_atoms.net_wm_state_modal;
273     supported[i++] = prop_atoms.net_wm_state_maximized_vert;
274     supported[i++] = prop_atoms.net_wm_state_maximized_horz;
275     supported[i++] = prop_atoms.net_wm_state_shaded;
276     supported[i++] = prop_atoms.net_wm_state_skip_taskbar;
277     supported[i++] = prop_atoms.net_wm_state_skip_pager;
278     supported[i++] = prop_atoms.net_wm_state_hidden;
279     supported[i++] = prop_atoms.net_wm_state_fullscreen;
280     supported[i++] = prop_atoms.net_wm_state_above;
281     supported[i++] = prop_atoms.net_wm_state_below;
282     supported[i++] = prop_atoms.net_wm_state_demands_attention;
283     supported[i++] = prop_atoms.net_moveresize_window;
284     supported[i++] = prop_atoms.net_wm_moveresize;
285     supported[i++] = prop_atoms.net_wm_user_time;
286     supported[i++] = prop_atoms.net_wm_user_time_window;
287     supported[i++] = prop_atoms.net_frame_extents;
288     supported[i++] = prop_atoms.net_request_frame_extents;
289     supported[i++] = prop_atoms.net_restack_window;
290     supported[i++] = prop_atoms.net_startup_id;
291 #ifdef SYNC
292     supported[i++] = prop_atoms.net_wm_sync_request;
293     supported[i++] = prop_atoms.net_wm_sync_request_counter;
294 #endif
295
296     supported[i++] = prop_atoms.kde_wm_change_state;
297     supported[i++] = prop_atoms.kde_net_wm_frame_strut;
298     supported[i++] = prop_atoms.kde_net_wm_window_type_override;
299
300     supported[i++] = prop_atoms.ob_wm_action_undecorate;
301     supported[i++] = prop_atoms.ob_wm_state_undecorated;
302     supported[i++] = prop_atoms.openbox_pid;
303     supported[i++] = prop_atoms.ob_theme;
304     supported[i++] = prop_atoms.ob_control;
305     g_assert(i == num_support);
306
307     PROP_SETA32(RootWindow(ob_display, ob_screen),
308                 net_supported, atom, supported, num_support);
309     g_free(supported);
310
311     screen_tell_ksplash();
312
313     return TRUE;
314 }
315
316 static void screen_tell_ksplash()
317 {
318     XEvent e;
319     char **argv;
320
321     argv = g_new(gchar*, 6);
322     argv[0] = g_strdup("dcop");
323     argv[1] = g_strdup("ksplash");
324     argv[2] = g_strdup("ksplash");
325     argv[3] = g_strdup("upAndRunning(QString)");
326     argv[4] = g_strdup("wm started");
327     argv[5] = NULL;
328
329     /* tell ksplash through the dcop server command line interface */
330     g_spawn_async(NULL, argv, NULL,
331                   G_SPAWN_SEARCH_PATH | G_SPAWN_DO_NOT_REAP_CHILD |
332                   G_SPAWN_STDERR_TO_DEV_NULL | G_SPAWN_STDOUT_TO_DEV_NULL,
333                   NULL, NULL, NULL, NULL);
334     g_strfreev(argv);
335
336     /* i'm not sure why we do this, kwin does it, but ksplash doesn't seem to
337        hear it anyways. perhaps it is for old ksplash. or new ksplash. or
338        something. oh well. */
339     e.xclient.type = ClientMessage;
340     e.xclient.display = ob_display;
341     e.xclient.window = RootWindow(ob_display, ob_screen);
342     e.xclient.message_type =
343         XInternAtom(ob_display, "_KDE_SPLASH_PROGRESS", False );
344     e.xclient.format = 8;
345     strcpy(e.xclient.data.b, "wm started");
346     XSendEvent(ob_display, RootWindow(ob_display, ob_screen),
347                False, SubstructureNotifyMask, &e );
348 }
349
350 void screen_startup(gboolean reconfig)
351 {
352     gchar **names = NULL;
353     guint32 d;
354     gboolean namesexist = FALSE;
355
356     desktop_cycle_popup = pager_popup_new(FALSE);
357     pager_popup_height(desktop_cycle_popup, POPUP_HEIGHT);
358
359     if (reconfig) {
360         /* update the pager popup's width */
361         pager_popup_text_width_to_strings(desktop_cycle_popup,
362                                           screen_desktop_names,
363                                           screen_num_desktops);
364         return;
365     }
366
367     /* get the initial size */
368     screen_resize();
369
370     /* have names already been set for the desktops? */
371     if (PROP_GETSS(RootWindow(ob_display, ob_screen),
372                    net_desktop_names, utf8, &names))
373     {
374         g_strfreev(names);
375         namesexist = TRUE;
376     }
377
378     /* if names don't exist and we have session names, set those.
379        do this stuff BEFORE setting the number of desktops, because that
380        will create default names for them
381     */
382     if (!namesexist && session_desktop_names != NULL) {
383         guint i, numnames;
384         GSList *it;
385
386         /* get the desktop names */
387         numnames = g_slist_length(session_desktop_names);
388         names = g_new(gchar*, numnames + 1);
389         names[numnames] = NULL;
390         for (i = 0, it = session_desktop_names; it; ++i, it = g_slist_next(it))
391             names[i] = g_strdup(it->data);
392
393         /* set the root window property */
394         PROP_SETSS(RootWindow(ob_display, ob_screen), net_desktop_names,names);
395
396         g_strfreev(names);
397     }
398
399     /* set the number of desktops, if it's not already set.
400
401        this will also set the default names from the config file up for
402        desktops that don't have names yet */
403     screen_num_desktops = 0;
404     if (PROP_GET32(RootWindow(ob_display, ob_screen),
405                    net_number_of_desktops, cardinal, &d))
406         screen_set_num_desktops(d);
407     /* restore from session if possible */
408     else if (session_num_desktops)
409         screen_set_num_desktops(session_num_desktops);
410     else
411         screen_set_num_desktops(config_desktops_num);
412
413     screen_desktop = screen_num_desktops;  /* something invalid */
414     /* start on the current desktop when a wm was already running */
415     if (PROP_GET32(RootWindow(ob_display, ob_screen),
416                    net_current_desktop, cardinal, &d) &&
417         d < screen_num_desktops)
418     {
419         screen_set_desktop(d, FALSE);
420     } else if (session_desktop >= 0)
421         screen_set_desktop(MIN((guint)session_desktop,
422                                screen_num_desktops), FALSE);
423     else
424         screen_set_desktop(MIN(config_screen_firstdesk,
425                                screen_num_desktops) - 1, FALSE);
426     screen_last_desktop = screen_desktop;
427
428     /* don't start in showing-desktop mode */
429     screen_showing_desktop = FALSE;
430     PROP_SET32(RootWindow(ob_display, ob_screen),
431                net_showing_desktop, cardinal, screen_showing_desktop);
432
433     if (session_desktop_layout_present &&
434         screen_validate_layout(&session_desktop_layout))
435     {
436         screen_desktop_layout = session_desktop_layout;
437     }
438     else
439         screen_update_layout();
440 }
441
442 void screen_shutdown(gboolean reconfig)
443 {
444     pager_popup_free(desktop_cycle_popup);
445
446     if (reconfig)
447         return;
448
449     XSelectInput(ob_display, RootWindow(ob_display, ob_screen),
450                  NoEventMask);
451
452     /* we're not running here no more! */
453     PROP_ERASE(RootWindow(ob_display, ob_screen), openbox_pid);
454     /* not without us */
455     PROP_ERASE(RootWindow(ob_display, ob_screen), net_supported);
456     /* don't keep this mode */
457     PROP_ERASE(RootWindow(ob_display, ob_screen), net_showing_desktop);
458
459     XDestroyWindow(ob_display, screen_support_win);
460
461     g_strfreev(screen_desktop_names);
462     screen_desktop_names = NULL;
463 }
464
465 void screen_resize()
466 {
467     static gint oldw = 0, oldh = 0;
468     gint w, h;
469     GList *it;
470     gulong geometry[2];
471
472     w = WidthOfScreen(ScreenOfDisplay(ob_display, ob_screen));
473     h = HeightOfScreen(ScreenOfDisplay(ob_display, ob_screen));
474
475     if (w == oldw && h == oldh) return;
476
477     oldw = w; oldh = h;
478
479     /* Set the _NET_DESKTOP_GEOMETRY hint */
480     screen_physical_size.width = geometry[0] = w;
481     screen_physical_size.height = geometry[1] = h;
482     PROP_SETA32(RootWindow(ob_display, ob_screen),
483                 net_desktop_geometry, cardinal, geometry, 2);
484
485     if (ob_state() == OB_STATE_STARTING)
486         return;
487
488     screen_update_areas();
489     dock_configure();
490
491     for (it = client_list; it; it = g_list_next(it))
492         client_move_onscreen(it->data, FALSE);
493 }
494
495 void screen_set_num_desktops(guint num)
496 {
497     guint old;
498     gulong *viewport;
499     GList *it, *stacking_copy;
500
501     g_assert(num > 0);
502
503     if (screen_num_desktops == num) return;
504
505     old = screen_num_desktops;
506     screen_num_desktops = num;
507     PROP_SET32(RootWindow(ob_display, ob_screen),
508                net_number_of_desktops, cardinal, num);
509
510     /* set the viewport hint */
511     viewport = g_new0(gulong, num * 2);
512     PROP_SETA32(RootWindow(ob_display, ob_screen),
513                 net_desktop_viewport, cardinal, viewport, num * 2);
514     g_free(viewport);
515
516     /* the number of rows/columns will differ */
517     screen_update_layout();
518
519     /* move windows on desktops that will no longer exist!
520        make a copy of the list cuz we're changing it */
521     stacking_copy = g_list_copy(stacking_list);
522     for (it = g_list_last(stacking_copy); it; it = g_list_previous(it)) {
523         if (WINDOW_IS_CLIENT(it->data)) {
524             ObClient *c = it->data;
525             if (c->desktop != DESKTOP_ALL && c->desktop >= num)
526                 client_set_desktop(c, num - 1, FALSE, TRUE);
527             /* raise all the windows that are on the current desktop which
528                is being merged */
529             else if (screen_desktop == num - 1 &&
530                      (c->desktop == DESKTOP_ALL ||
531                       c->desktop == screen_desktop))
532                 stacking_raise(CLIENT_AS_WINDOW(c));
533         }
534     }
535
536     /* change our struts/area to match (after moving windows) */
537     screen_update_areas();
538
539     /* may be some unnamed desktops that we need to fill in with names
540      (after updating the areas so the popup can resize) */
541     screen_update_desktop_names();
542
543     /* change our desktop if we're on one that no longer exists! */
544     if (screen_desktop >= screen_num_desktops)
545         screen_set_desktop(num - 1, TRUE);
546 }
547
548 void screen_set_desktop(guint num, gboolean dofocus)
549 {
550     ObClient *c;
551     GList *it;
552     guint old;
553     gulong ignore_start;
554     gboolean allow_omni;
555
556     g_assert(num < screen_num_desktops);
557
558     old = screen_desktop;
559     screen_desktop = num;
560
561     if (old == num) return;
562
563     PROP_SET32(RootWindow(ob_display, ob_screen),
564                net_current_desktop, cardinal, num);
565
566     screen_last_desktop = old;
567
568     ob_debug("Moving to desktop %d\n", num+1);
569
570     /* ignore enter events caused by the move */
571     ignore_start = event_start_ignore_all_enters();
572
573     if (moveresize_client)
574         client_set_desktop(moveresize_client, num, TRUE, FALSE);
575
576     /* show windows before hiding the rest to lessen the enter/leave events */
577
578     /* show windows from top to bottom */
579     for (it = stacking_list; it; it = g_list_next(it)) {
580         if (WINDOW_IS_CLIENT(it->data)) {
581             ObClient *c = it->data;
582             client_show(c);
583         }
584     }
585
586     /* only allow omnipresent windows to get focus on desktop change if
587        an omnipresent window is already focused (it'll keep focus probably, but
588        maybe not depending on mouse-focus options) */
589     allow_omni = focus_client && (client_normal(focus_client) &&
590                                   focus_client->desktop == DESKTOP_ALL);
591
592     /* the client moved there already so don't move focus. prevent flicker
593        on sendtodesktop + follow */
594     if (focus_client && focus_client->desktop == screen_desktop)
595         dofocus = FALSE;
596
597     /* have to try focus here because when you leave an empty desktop
598        there is no focus out to watch for. also, we have different rules
599        here. we always allow it to look under the mouse pointer if
600        config_focus_last is FALSE
601
602        do this before hiding the windows so if helper windows are coming
603        with us, they don't get hidden
604     */
605     if (dofocus && (c = focus_fallback(TRUE, !config_focus_last, allow_omni)))
606     {
607         /* only do the flicker reducing stuff ahead of time if we are going
608            to call xsetinputfocus on the window ourselves. otherwise there is
609            no guarantee the window will actually take focus.. */
610         if (c->can_focus) {
611             /* reduce flicker by hiliting now rather than waiting for the
612                server FocusIn event */
613             frame_adjust_focus(c->frame, TRUE);
614             /* do this here so that if you switch desktops to a window with
615                helper windows then the helper windows won't flash */
616             client_bring_helper_windows(c);
617         }
618     }
619
620     /* hide windows from bottom to top */
621     for (it = g_list_last(stacking_list); it; it = g_list_previous(it)) {
622         if (WINDOW_IS_CLIENT(it->data)) {
623             ObClient *c = it->data;
624             client_hide(c);
625         }
626     }
627
628     event_end_ignore_all_enters(ignore_start);
629
630     if (event_curtime != CurrentTime)
631         screen_desktop_user_time = event_curtime;
632 }
633
634 void screen_add_desktop(gboolean current)
635 {
636     screen_set_num_desktops(screen_num_desktops+1);
637
638     /* move all the clients over */
639     if (current) {
640         GList *it;
641
642         for (it = client_list; it; it = g_list_next(it)) {
643             ObClient *c = it->data;
644             if (c->desktop != DESKTOP_ALL && c->desktop >= screen_desktop &&
645                 /* don't move direct children, they'll be moved with their
646                    parent - which will have to be on the same desktop */
647                 !client_direct_parent(c))
648             {
649                 ob_debug("moving window %s\n", c->title);
650                 client_set_desktop(c, c->desktop+1, FALSE, TRUE);
651             }
652         }
653     }
654 }
655
656 void screen_remove_desktop(gboolean current)
657 {
658     guint rmdesktop, movedesktop;
659     GList *it, *stacking_copy;
660
661     if (screen_num_desktops <= 1) return;
662
663     /* what desktop are we removing and moving to? */
664     if (current)
665         rmdesktop = screen_desktop;
666     else
667         rmdesktop = screen_num_desktops - 1;
668     if (rmdesktop < screen_num_desktops - 1)
669         movedesktop = rmdesktop + 1;
670     else
671         movedesktop = rmdesktop;
672
673     /* make a copy of the list cuz we're changing it */
674     stacking_copy = g_list_copy(stacking_list);
675     for (it = g_list_last(stacking_copy); it; it = g_list_previous(it)) {
676         if (WINDOW_IS_CLIENT(it->data)) {
677             ObClient *c = it->data;
678             guint d = c->desktop;
679             if (d != DESKTOP_ALL && d >= movedesktop &&
680                 /* don't move direct children, they'll be moved with their
681                    parent - which will have to be on the same desktop */
682                 !client_direct_parent(c))
683             {
684                 ob_debug("moving window %s\n", c->title);
685                 client_set_desktop(c, c->desktop - 1, TRUE, TRUE);
686             }
687             /* raise all the windows that are on the current desktop which
688                is being merged */
689             if ((screen_desktop == rmdesktop - 1 ||
690                  screen_desktop == rmdesktop) &&
691                 (d == DESKTOP_ALL || d == screen_desktop))
692             {
693                 stacking_raise(CLIENT_AS_WINDOW(c));
694                 ob_debug("raising window %s\n", c->title);
695             }
696         }
697     }
698
699     /* act like we're changing desktops */
700     if (screen_desktop < screen_num_desktops - 1) {
701         gint d = screen_desktop;
702         screen_desktop = screen_last_desktop;
703         screen_set_desktop(d, TRUE);
704         ob_debug("fake desktop change\n");
705     }
706
707     screen_set_num_desktops(screen_num_desktops-1);
708 }
709
710 static void get_row_col(guint d, guint *r, guint *c)
711 {
712     switch (screen_desktop_layout.orientation) {
713     case OB_ORIENTATION_HORZ:
714         switch (screen_desktop_layout.start_corner) {
715         case OB_CORNER_TOPLEFT:
716             *r = d / screen_desktop_layout.columns;
717             *c = d % screen_desktop_layout.columns;
718             break;
719         case OB_CORNER_BOTTOMLEFT:
720             *r = screen_desktop_layout.rows - 1 -
721                 d / screen_desktop_layout.columns;
722             *c = d % screen_desktop_layout.columns;
723             break;
724         case OB_CORNER_TOPRIGHT:
725             *r = d / screen_desktop_layout.columns;
726             *c = screen_desktop_layout.columns - 1 -
727                 d % screen_desktop_layout.columns;
728             break;
729         case OB_CORNER_BOTTOMRIGHT:
730             *r = screen_desktop_layout.rows - 1 -
731                 d / screen_desktop_layout.columns;
732             *c = screen_desktop_layout.columns - 1 -
733                 d % screen_desktop_layout.columns;
734             break;
735         }
736         break;
737     case OB_ORIENTATION_VERT:
738         switch (screen_desktop_layout.start_corner) {
739         case OB_CORNER_TOPLEFT:
740             *r = d % screen_desktop_layout.rows;
741             *c = d / screen_desktop_layout.rows;
742             break;
743         case OB_CORNER_BOTTOMLEFT:
744             *r = screen_desktop_layout.rows - 1 -
745                 d % screen_desktop_layout.rows;
746             *c = d / screen_desktop_layout.rows;
747             break;
748         case OB_CORNER_TOPRIGHT:
749             *r = d % screen_desktop_layout.rows;
750             *c = screen_desktop_layout.columns - 1 -
751                 d / screen_desktop_layout.rows;
752             break;
753         case OB_CORNER_BOTTOMRIGHT:
754             *r = screen_desktop_layout.rows - 1 -
755                 d % screen_desktop_layout.rows;
756             *c = screen_desktop_layout.columns - 1 -
757                 d / screen_desktop_layout.rows;
758             break;
759         }
760         break;
761     }
762 }
763
764 static guint translate_row_col(guint r, guint c)
765 {
766     switch (screen_desktop_layout.orientation) {
767     case OB_ORIENTATION_HORZ:
768         switch (screen_desktop_layout.start_corner) {
769         case OB_CORNER_TOPLEFT:
770             return r % screen_desktop_layout.rows *
771                 screen_desktop_layout.columns +
772                 c % screen_desktop_layout.columns;
773         case OB_CORNER_BOTTOMLEFT:
774             return (screen_desktop_layout.rows - 1 -
775                     r % screen_desktop_layout.rows) *
776                 screen_desktop_layout.columns +
777                 c % screen_desktop_layout.columns;
778         case OB_CORNER_TOPRIGHT:
779             return r % screen_desktop_layout.rows *
780                 screen_desktop_layout.columns +
781                 (screen_desktop_layout.columns - 1 -
782                  c % screen_desktop_layout.columns);
783         case OB_CORNER_BOTTOMRIGHT:
784             return (screen_desktop_layout.rows - 1 -
785                     r % screen_desktop_layout.rows) *
786                 screen_desktop_layout.columns +
787                 (screen_desktop_layout.columns - 1 -
788                  c % screen_desktop_layout.columns);
789         }
790     case OB_ORIENTATION_VERT:
791         switch (screen_desktop_layout.start_corner) {
792         case OB_CORNER_TOPLEFT:
793             return c % screen_desktop_layout.columns *
794                 screen_desktop_layout.rows +
795                 r % screen_desktop_layout.rows;
796         case OB_CORNER_BOTTOMLEFT:
797             return c % screen_desktop_layout.columns *
798                 screen_desktop_layout.rows +
799                 (screen_desktop_layout.rows - 1 -
800                  r % screen_desktop_layout.rows);
801         case OB_CORNER_TOPRIGHT:
802             return (screen_desktop_layout.columns - 1 -
803                     c % screen_desktop_layout.columns) *
804                 screen_desktop_layout.rows +
805                 r % screen_desktop_layout.rows;
806         case OB_CORNER_BOTTOMRIGHT:
807             return (screen_desktop_layout.columns - 1 -
808                     c % screen_desktop_layout.columns) *
809                 screen_desktop_layout.rows +
810                 (screen_desktop_layout.rows - 1 -
811                  r % screen_desktop_layout.rows);
812         }
813     }
814     g_assert_not_reached();
815     return 0;
816 }
817
818 void screen_desktop_popup(guint d, gboolean show)
819 {
820     Rect *a;
821
822     if (!show) {
823         pager_popup_hide(desktop_cycle_popup);
824     } else {
825         a = screen_physical_area_active();
826         pager_popup_position(desktop_cycle_popup, CenterGravity,
827                              a->x + a->width / 2, a->y + a->height / 2);
828         pager_popup_icon_size_multiplier(desktop_cycle_popup,
829                                          (screen_desktop_layout.columns /
830                                           screen_desktop_layout.rows) / 2,
831                                          (screen_desktop_layout.rows/
832                                           screen_desktop_layout.columns) / 2);
833         pager_popup_max_width(desktop_cycle_popup,
834                               MAX(a->width/3, POPUP_WIDTH));
835         pager_popup_show(desktop_cycle_popup, screen_desktop_names[d], d);
836     }
837 }
838
839 guint screen_find_desktop(guint from, ObDirection dir,
840                           gboolean wrap, gboolean linear)
841 {
842     guint r, c;
843     guint d;
844
845     d = from;
846     get_row_col(d, &r, &c);
847     if (linear) {
848         switch (dir) {
849         case OB_DIRECTION_EAST:
850             if (d < screen_num_desktops - 1)
851                 ++d;
852             else if (wrap)
853                 d = 0;
854             else
855                 return from;
856             break;
857         case OB_DIRECTION_WEST:
858             if (d > 0)
859                 --d;
860             else if (wrap)
861                 d = screen_num_desktops - 1;
862             else
863                 return from;
864             break;
865         default:
866             g_assert_not_reached();
867             return from;
868         }
869     } else {
870         switch (dir) {
871         case OB_DIRECTION_EAST:
872             ++c;
873             if (c >= screen_desktop_layout.columns) {
874                 if (wrap)
875                     c = 0;
876                 else
877                     return from;
878             }
879             d = translate_row_col(r, c);
880             if (d >= screen_num_desktops) {
881                 if (wrap)
882                     ++c;
883                 else
884                     return from;
885             }
886             break;
887         case OB_DIRECTION_WEST:
888             --c;
889             if (c >= screen_desktop_layout.columns) {
890                 if (wrap)
891                     c = screen_desktop_layout.columns - 1;
892                 else
893                     return from;
894             }
895             d = translate_row_col(r, c);
896             if (d >= screen_num_desktops) {
897                 if (wrap)
898                     --c;
899                 else
900                     return from;
901             }
902             break;
903         case OB_DIRECTION_SOUTH:
904             ++r;
905             if (r >= screen_desktop_layout.rows) {
906                 if (wrap)
907                     r = 0;
908                 else
909                     return from;
910             }
911             d = translate_row_col(r, c);
912             if (d >= screen_num_desktops) {
913                 if (wrap)
914                     ++r;
915                 else
916                     return from;
917             }
918             break;
919         case OB_DIRECTION_NORTH:
920             --r;
921             if (r >= screen_desktop_layout.rows) {
922                 if (wrap)
923                     r = screen_desktop_layout.rows - 1;
924                 else
925                     return from;
926             }
927             d = translate_row_col(r, c);
928             if (d >= screen_num_desktops) {
929                 if (wrap)
930                     --r;
931                 else
932                     return from;
933             }
934             break;
935         default:
936             g_assert_not_reached();
937             return from;
938         }
939
940         d = translate_row_col(r, c);
941     }
942     return d;
943 }
944
945 guint screen_cycle_desktop(ObDirection dir, gboolean wrap, gboolean linear,
946                            gboolean dialog, gboolean done, gboolean cancel)
947 {
948     static guint d = (guint)-1;
949     guint ret;
950
951     if (d == (guint)-1)
952         d = screen_desktop;
953
954     if ((!cancel && !done) || !dialog)
955         d = screen_find_desktop(d, dir, wrap, linear);
956
957     if (dialog && !cancel && !done)
958         screen_desktop_popup(d, TRUE);
959     else
960         screen_desktop_popup(0, FALSE);
961     ret = d;
962
963     if (!dialog || cancel || done)
964         d = (guint)-1;
965
966     return ret;
967 }
968
969 static gboolean screen_validate_layout(ObDesktopLayout *l)
970 {
971     if (l->columns == 0 && l->rows == 0) /* both 0's is bad data.. */
972         return FALSE;
973
974     /* fill in a zero rows/columns */
975     if (l->columns == 0) {
976         l->columns = screen_num_desktops / l->rows;
977         if (l->rows * l->columns < screen_num_desktops)
978             l->columns++;
979         if (l->rows * l->columns >= screen_num_desktops + l->columns)
980             l->rows--;
981     } else if (l->rows == 0) {
982         l->rows = screen_num_desktops / l->columns;
983         if (l->columns * l->rows < screen_num_desktops)
984             l->rows++;
985         if (l->columns * l->rows >= screen_num_desktops + l->rows)
986             l->columns--;
987     }
988
989     /* bounds checking */
990     if (l->orientation == OB_ORIENTATION_HORZ) {
991         l->columns = MIN(screen_num_desktops, l->columns);
992         l->rows = MIN(l->rows,
993                       (screen_num_desktops + l->columns - 1) / l->columns);
994         l->columns = screen_num_desktops / l->rows +
995             !!(screen_num_desktops % l->rows);
996     } else {
997         l->rows = MIN(screen_num_desktops, l->rows);
998         l->columns = MIN(l->columns,
999                          (screen_num_desktops + l->rows - 1) / l->rows);
1000         l->rows = screen_num_desktops / l->columns +
1001             !!(screen_num_desktops % l->columns);
1002     }
1003     return TRUE;
1004 }
1005
1006 void screen_update_layout()
1007
1008 {
1009     ObDesktopLayout l;
1010     guint32 *data;
1011     guint num;
1012
1013     screen_desktop_layout.orientation = OB_ORIENTATION_HORZ;
1014     screen_desktop_layout.start_corner = OB_CORNER_TOPLEFT;
1015     screen_desktop_layout.rows = 1;
1016     screen_desktop_layout.columns = screen_num_desktops;
1017
1018     if (PROP_GETA32(RootWindow(ob_display, ob_screen),
1019                     net_desktop_layout, cardinal, &data, &num)) {
1020         if (num == 3 || num == 4) {
1021
1022             if (data[0] == prop_atoms.net_wm_orientation_vert)
1023                 l.orientation = OB_ORIENTATION_VERT;
1024             else if (data[0] == prop_atoms.net_wm_orientation_horz)
1025                 l.orientation = OB_ORIENTATION_HORZ;
1026             else
1027                 return;
1028
1029             if (num < 4)
1030                 l.start_corner = OB_CORNER_TOPLEFT;
1031             else {
1032                 if (data[3] == prop_atoms.net_wm_topleft)
1033                     l.start_corner = OB_CORNER_TOPLEFT;
1034                 else if (data[3] == prop_atoms.net_wm_topright)
1035                     l.start_corner = OB_CORNER_TOPRIGHT;
1036                 else if (data[3] == prop_atoms.net_wm_bottomright)
1037                     l.start_corner = OB_CORNER_BOTTOMRIGHT;
1038                 else if (data[3] == prop_atoms.net_wm_bottomleft)
1039                     l.start_corner = OB_CORNER_BOTTOMLEFT;
1040                 else
1041                     return;
1042             }
1043
1044             l.columns = data[1];
1045             l.rows = data[2];
1046
1047             if (screen_validate_layout(&l))
1048                 screen_desktop_layout = l;
1049
1050             g_free(data);
1051         }
1052     }
1053 }
1054
1055 void screen_update_desktop_names()
1056 {
1057     guint i;
1058
1059     /* empty the array */
1060     g_strfreev(screen_desktop_names);
1061     screen_desktop_names = NULL;
1062
1063     if (PROP_GETSS(RootWindow(ob_display, ob_screen),
1064                    net_desktop_names, utf8, &screen_desktop_names))
1065         for (i = 0; screen_desktop_names[i] && i < screen_num_desktops; ++i);
1066     else
1067         i = 0;
1068     if (i < screen_num_desktops) {
1069         GSList *it;
1070
1071         screen_desktop_names = g_renew(gchar*, screen_desktop_names,
1072                                        screen_num_desktops + 1);
1073         screen_desktop_names[screen_num_desktops] = NULL;
1074
1075         it = g_slist_nth(config_desktops_names, i);
1076
1077         for (; i < screen_num_desktops; ++i) {
1078             if (it && ((char*)it->data)[0]) /* not empty */
1079                 /* use the names from the config file when possible */
1080                 screen_desktop_names[i] = g_strdup(it->data);
1081             else
1082                 /* make up a nice name if it's not though */
1083                 screen_desktop_names[i] = g_strdup_printf(_("desktop %i"),
1084                                                           i + 1);
1085             if (it) it = g_slist_next(it);
1086         }
1087
1088         /* if we changed any names, then set the root property so we can
1089            all agree on the names */
1090         PROP_SETSS(RootWindow(ob_display, ob_screen), net_desktop_names,
1091                    screen_desktop_names);
1092     }
1093
1094     /* resize the pager for these names */
1095     pager_popup_text_width_to_strings(desktop_cycle_popup,
1096                                       screen_desktop_names,
1097                                       screen_num_desktops);
1098 }
1099
1100 void screen_show_desktop(gboolean show, ObClient *show_only)
1101 {
1102     GList *it;
1103
1104     if (show == screen_showing_desktop) return; /* no change */
1105
1106     screen_showing_desktop = show;
1107
1108     if (show) {
1109         /* hide windows bottom to top */
1110         for (it = g_list_last(stacking_list); it; it = g_list_previous(it)) {
1111             if (WINDOW_IS_CLIENT(it->data)) {
1112                 ObClient *client = it->data;
1113                 client_showhide(client);
1114             }
1115         }
1116     }
1117     else {
1118         /* restore windows top to bottom */
1119         for (it = stacking_list; it; it = g_list_next(it)) {
1120             if (WINDOW_IS_CLIENT(it->data)) {
1121                 ObClient *client = it->data;
1122                 if (client_should_show(client)) {
1123                     if (!show_only || client == show_only)
1124                         client_show(client);
1125                     else
1126                         client_iconify(client, TRUE, FALSE, TRUE);
1127                 }
1128             }
1129         }
1130     }
1131
1132     if (show) {
1133         /* focus the desktop */
1134         for (it = focus_order; it; it = g_list_next(it)) {
1135             ObClient *c = it->data;
1136             if (c->type == OB_CLIENT_TYPE_DESKTOP &&
1137                 (c->desktop == screen_desktop || c->desktop == DESKTOP_ALL) &&
1138                 client_focus(it->data))
1139                 break;
1140         }
1141     }
1142     else if (!show_only) {
1143         ObClient *c;
1144
1145         if ((c = focus_fallback(TRUE, FALSE, TRUE))) {
1146             /* only do the flicker reducing stuff ahead of time if we are going
1147                to call xsetinputfocus on the window ourselves. otherwise there
1148                is no guarantee the window will actually take focus.. */
1149             if (c->can_focus) {
1150                 /* reduce flicker by hiliting now rather than waiting for the
1151                    server FocusIn event */
1152                 frame_adjust_focus(c->frame, TRUE);
1153             }
1154         }
1155     }
1156
1157     show = !!show; /* make it boolean */
1158     PROP_SET32(RootWindow(ob_display, ob_screen),
1159                net_showing_desktop, cardinal, show);
1160 }
1161
1162 void screen_install_colormap(ObClient *client, gboolean install)
1163 {
1164     if (client == NULL || client->colormap == None) {
1165         if (install)
1166             XInstallColormap(RrDisplay(ob_rr_inst), RrColormap(ob_rr_inst));
1167         else
1168             XUninstallColormap(RrDisplay(ob_rr_inst), RrColormap(ob_rr_inst));
1169     } else {
1170         xerror_set_ignore(TRUE);
1171         if (install)
1172             XInstallColormap(RrDisplay(ob_rr_inst), client->colormap);
1173         else
1174             XUninstallColormap(RrDisplay(ob_rr_inst), client->colormap);
1175         xerror_set_ignore(FALSE);
1176     }
1177 }
1178
1179 #define STRUT_LEFT_ON_MONITOR(s, i) \
1180     (RANGES_INTERSECT(s->left_start, s->left_end - s->left_start + 1, \
1181                       monitor_area[i].y, monitor_area[i].height))
1182 #define STRUT_RIGHT_ON_MONITOR(s, i) \
1183     (RANGES_INTERSECT(s->right_start, s->right_end - s->right_start + 1, \
1184                       monitor_area[i].y, monitor_area[i].height))
1185 #define STRUT_TOP_ON_MONITOR(s, i) \
1186     (RANGES_INTERSECT(s->top_start, s->top_end - s->top_start + 1, \
1187                       monitor_area[i].x, monitor_area[i].width))
1188 #define STRUT_BOTTOM_ON_MONITOR(s, i) \
1189     (RANGES_INTERSECT(s->bottom_start, s->bottom_end - s->bottom_start + 1, \
1190                       monitor_area[i].x, monitor_area[i].width))
1191
1192 typedef struct {
1193     guint desktop;
1194     StrutPartial *strut;
1195 } ObScreenStrut;
1196
1197 #define RESET_STRUT_LIST(sl) \
1198     (g_slist_free(sl), sl = NULL)
1199
1200 #define ADD_STRUT_TO_LIST(sl, d, s) \
1201 { \
1202     ObScreenStrut *ss = g_new(ObScreenStrut, 1); \
1203     ss->desktop = d; \
1204     ss->strut = s;  \
1205     sl = g_slist_prepend(sl, ss); \
1206 }
1207
1208 #define VALIDATE_STRUTS(sl, side, max) \
1209 { \
1210     GSList *it; \
1211     for (it = sl; it; it = g_slist_next(it)) { \
1212       ObScreenStrut *ss = it->data; \
1213       ss->strut->side = MIN(max, ss->strut->side); \
1214     } \
1215 }
1216
1217 void screen_update_areas()
1218 {
1219     guint i, j;
1220     gulong *dims;
1221     GList *it;
1222     GSList *sit;
1223
1224     g_free(monitor_area);
1225     extensions_xinerama_screens(&monitor_area, &screen_num_monitors);
1226
1227     /* set up the user-specified margins */
1228     config_margins.top_start = RECT_LEFT(monitor_area[screen_num_monitors]);
1229     config_margins.top_end = RECT_RIGHT(monitor_area[screen_num_monitors]);
1230     config_margins.bottom_start = RECT_LEFT(monitor_area[screen_num_monitors]);
1231     config_margins.bottom_end = RECT_RIGHT(monitor_area[screen_num_monitors]);
1232     config_margins.left_start = RECT_TOP(monitor_area[screen_num_monitors]);
1233     config_margins.left_end = RECT_BOTTOM(monitor_area[screen_num_monitors]);
1234     config_margins.right_start = RECT_TOP(monitor_area[screen_num_monitors]);
1235     config_margins.right_end = RECT_BOTTOM(monitor_area[screen_num_monitors]);
1236
1237     dims = g_new(gulong, 4 * screen_num_desktops * screen_num_monitors);
1238
1239     RESET_STRUT_LIST(struts_left);
1240     RESET_STRUT_LIST(struts_top);
1241     RESET_STRUT_LIST(struts_right);
1242     RESET_STRUT_LIST(struts_bottom);
1243
1244     /* collect the struts */
1245     for (it = client_list; it; it = g_list_next(it)) {
1246         ObClient *c = it->data;
1247         if (c->strut.left)
1248             ADD_STRUT_TO_LIST(struts_left, c->desktop, &c->strut);
1249         if (c->strut.top)
1250             ADD_STRUT_TO_LIST(struts_top, c->desktop, &c->strut);
1251         if (c->strut.right)
1252             ADD_STRUT_TO_LIST(struts_right, c->desktop, &c->strut);
1253         if (c->strut.bottom)
1254             ADD_STRUT_TO_LIST(struts_bottom, c->desktop, &c->strut);
1255     }
1256     if (dock_strut.left)
1257         ADD_STRUT_TO_LIST(struts_left, DESKTOP_ALL, &dock_strut);
1258     if (dock_strut.top)
1259         ADD_STRUT_TO_LIST(struts_top, DESKTOP_ALL, &dock_strut);
1260     if (dock_strut.right)
1261         ADD_STRUT_TO_LIST(struts_right, DESKTOP_ALL, &dock_strut);
1262     if (dock_strut.bottom)
1263         ADD_STRUT_TO_LIST(struts_bottom, DESKTOP_ALL, &dock_strut);
1264
1265     if (config_margins.left)
1266         ADD_STRUT_TO_LIST(struts_left, DESKTOP_ALL, &config_margins);
1267     if (config_margins.top)
1268         ADD_STRUT_TO_LIST(struts_top, DESKTOP_ALL, &config_margins);
1269     if (config_margins.right)
1270         ADD_STRUT_TO_LIST(struts_right, DESKTOP_ALL, &config_margins);
1271     if (config_margins.bottom)
1272         ADD_STRUT_TO_LIST(struts_bottom, DESKTOP_ALL, &config_margins);
1273
1274     VALIDATE_STRUTS(struts_left, left,
1275                     monitor_area[screen_num_monitors].width / 2);
1276     VALIDATE_STRUTS(struts_right, right,
1277                     monitor_area[screen_num_monitors].width / 2);
1278     VALIDATE_STRUTS(struts_top, top,
1279                     monitor_area[screen_num_monitors].height / 2);
1280     VALIDATE_STRUTS(struts_bottom, bottom,
1281                     monitor_area[screen_num_monitors].height / 2);
1282
1283     /* set up the work areas to be full screen */
1284     for (i = 0; i < screen_num_monitors; ++i)
1285         for (j = 0; j < screen_num_desktops; ++j) {
1286             dims[(i * screen_num_desktops + j) * 4+0] = monitor_area[i].x;
1287             dims[(i * screen_num_desktops + j) * 4+1] = monitor_area[i].y;
1288             dims[(i * screen_num_desktops + j) * 4+2] = monitor_area[i].width;
1289             dims[(i * screen_num_desktops + j) * 4+3] = monitor_area[i].height;
1290         }
1291
1292     /* calculate the work areas from the struts */
1293     for (i = 0; i < screen_num_monitors; ++i)
1294         for (j = 0; j < screen_num_desktops; ++j) {
1295             gint l = 0, r = 0, t = 0, b = 0;
1296
1297             /* only add the strut to the area if it touches the monitor */
1298
1299             for (sit = struts_left; sit; sit = g_slist_next(sit)) {
1300                 ObScreenStrut *s = sit->data;
1301                 if ((s->desktop == j || s->desktop == DESKTOP_ALL) &&
1302                     STRUT_LEFT_ON_MONITOR(s->strut, i))
1303                     l = MAX(l, s->strut->left);
1304             }
1305             for (sit = struts_top; sit; sit = g_slist_next(sit)) {
1306                 ObScreenStrut *s = sit->data;
1307                 if ((s->desktop == j || s->desktop == DESKTOP_ALL) &&
1308                     STRUT_TOP_ON_MONITOR(s->strut, i))
1309                     t = MAX(t, s->strut->top);
1310             }
1311             for (sit = struts_right; sit; sit = g_slist_next(sit)) {
1312                 ObScreenStrut *s = sit->data;
1313                 if ((s->desktop == j || s->desktop == DESKTOP_ALL) &&
1314                     STRUT_RIGHT_ON_MONITOR(s->strut, i))
1315                     r = MAX(r, s->strut->right);
1316             }
1317             for (sit = struts_bottom; sit; sit = g_slist_next(sit)) {
1318                 ObScreenStrut *s = sit->data;
1319                 if ((s->desktop == j || s->desktop == DESKTOP_ALL) &&
1320                     STRUT_BOTTOM_ON_MONITOR(s->strut, i))
1321                     b = MAX(b, s->strut->bottom);
1322             }
1323
1324             /* based on these margins, set the work area for the
1325                monitor/desktop */
1326             dims[(i * screen_num_desktops + j) * 4 + 0] += l;
1327             dims[(i * screen_num_desktops + j) * 4 + 1] += t;
1328             dims[(i * screen_num_desktops + j) * 4 + 2] -= l + r;
1329             dims[(i * screen_num_desktops + j) * 4 + 3] -= t + b;
1330         }
1331
1332     /* all the work areas are not used here, only the ones for the first
1333        monitor are */
1334     PROP_SETA32(RootWindow(ob_display, ob_screen), net_workarea, cardinal,
1335                 dims, 4 * screen_num_desktops);
1336
1337     /* the area has changed, adjust all the windows if they need it */
1338     for (it = client_list; it; it = g_list_next(it))
1339         client_reconfigure(it->data, FALSE);
1340
1341     g_free(dims);
1342 }
1343
1344 #if 0
1345 Rect* screen_area_all_monitors(guint desktop)
1346 {
1347     guint i;
1348     Rect *a;
1349
1350     a = screen_area_monitor(desktop, 0);
1351
1352     /* combine all the monitors together */
1353     for (i = 1; i < screen_num_monitors; ++i) {
1354         Rect *m = screen_area_monitor(desktop, i);
1355         gint l, r, t, b;
1356
1357         l = MIN(RECT_LEFT(*a), RECT_LEFT(*m));
1358         t = MIN(RECT_TOP(*a), RECT_TOP(*m));
1359         r = MAX(RECT_RIGHT(*a), RECT_RIGHT(*m));
1360         b = MAX(RECT_BOTTOM(*a), RECT_BOTTOM(*m));
1361
1362         RECT_SET(*a, l, t, r - l + 1, b - t + 1);
1363
1364         g_free(m);
1365     }
1366
1367     return a;
1368 }
1369 #endif
1370
1371 #define STRUT_LEFT_IN_SEARCH(s, search) \
1372     (RANGES_INTERSECT(search->y, search->height, \
1373                       s->left_start, s->left_end - s->left_start + 1))
1374 #define STRUT_RIGHT_IN_SEARCH(s, search) \
1375     (RANGES_INTERSECT(search->y, search->height, \
1376                       s->right_start, s->right_end - s->right_start + 1))
1377 #define STRUT_TOP_IN_SEARCH(s, search) \
1378     (RANGES_INTERSECT(search->x, search->width, \
1379                       s->top_start, s->top_end - s->top_start + 1))
1380 #define STRUT_BOTTOM_IN_SEARCH(s, search) \
1381     (RANGES_INTERSECT(search->x, search->width, \
1382                       s->bottom_start, s->bottom_end - s->bottom_start + 1))
1383
1384 #define STRUT_LEFT_IGNORE(s, us, search) \
1385     (head == SCREEN_AREA_ALL_MONITORS && us && \
1386      RECT_LEFT(monitor_area[i]) + s->left > RECT_LEFT(*search))
1387 #define STRUT_RIGHT_IGNORE(s, us, search) \
1388     (head == SCREEN_AREA_ALL_MONITORS && us && \
1389      RECT_RIGHT(monitor_area[i]) - s->right < RECT_RIGHT(*search))
1390 #define STRUT_TOP_IGNORE(s, us, search) \
1391     (head == SCREEN_AREA_ALL_MONITORS && us && \
1392      RECT_TOP(monitor_area[i]) + s->top > RECT_TOP(*search))
1393 #define STRUT_BOTTOM_IGNORE(s, us, search) \
1394     (head == SCREEN_AREA_ALL_MONITORS && us && \
1395      RECT_BOTTOM(monitor_area[i]) - s->bottom < RECT_BOTTOM(*search))
1396
1397 Rect* screen_area(guint desktop, guint head, Rect *search)
1398 {
1399     Rect *a;
1400     GSList *it;
1401     gint l, r, t, b, al, ar, at, ab;
1402     guint i, d;
1403     gboolean us = search != NULL; /* user provided search */
1404
1405     g_assert(desktop < screen_num_desktops || desktop == DESKTOP_ALL);
1406     g_assert(head < screen_num_monitors || head == SCREEN_AREA_ONE_MONITOR ||
1407              head == SCREEN_AREA_ALL_MONITORS);
1408     g_assert(!(head == SCREEN_AREA_ONE_MONITOR && search == NULL));
1409
1410     /* find any struts for this monitor
1411        which will be affecting the search area.
1412     */
1413
1414     /* search everything if search is null */
1415     if (!search) {
1416         if (head < screen_num_monitors) search = &monitor_area[head];
1417         else search = &monitor_area[screen_num_monitors];
1418     }
1419     if (head == SCREEN_AREA_ONE_MONITOR) head = screen_find_monitor(search);
1420
1421     /* al is "all left" meaning the furthest left you can get, l is our
1422        "working left" meaning our current strut edge which we're calculating
1423     */
1424
1425     /* only include monitors which the search area lines up with */
1426     if (RECT_INTERSECTS_RECT(monitor_area[screen_num_monitors], *search)) {
1427         al = l = RECT_RIGHT(monitor_area[screen_num_monitors]);
1428         at = t = RECT_BOTTOM(monitor_area[screen_num_monitors]);
1429         ar = r = RECT_LEFT(monitor_area[screen_num_monitors]);
1430         ab = b = RECT_TOP(monitor_area[screen_num_monitors]);
1431         for (i = 0; i < screen_num_monitors; ++i) {
1432             /* add the monitor if applicable */
1433             if (RANGES_INTERSECT(search->x, search->width,
1434                                  monitor_area[i].x, monitor_area[i].width))
1435             {
1436                 at = t = MIN(t, RECT_TOP(monitor_area[i]));
1437                 ab = b = MAX(b, RECT_BOTTOM(monitor_area[i]));
1438             }
1439             if (RANGES_INTERSECT(search->y, search->height,
1440                                  monitor_area[i].y, monitor_area[i].height))
1441             {
1442                 al = l = MIN(l, RECT_LEFT(monitor_area[i]));
1443                 ar = r = MAX(r, RECT_RIGHT(monitor_area[i]));
1444             }
1445         }
1446     } else {
1447         al = l = RECT_LEFT(monitor_area[screen_num_monitors]);
1448         at = t = RECT_TOP(monitor_area[screen_num_monitors]);
1449         ar = r = RECT_RIGHT(monitor_area[screen_num_monitors]);
1450         ab = b = RECT_BOTTOM(monitor_area[screen_num_monitors]);
1451     }
1452
1453     for (d = 0; d < screen_num_desktops; ++d) {
1454         if (d != desktop && desktop != DESKTOP_ALL) continue;
1455
1456         for (i = 0; i < screen_num_monitors; ++i) {
1457             if (head != SCREEN_AREA_ALL_MONITORS && head != i) continue;
1458
1459             for (it = struts_left; it; it = g_slist_next(it)) {
1460                 ObScreenStrut *s = it->data;
1461                 if ((s->desktop == d || s->desktop == DESKTOP_ALL) &&
1462                     STRUT_LEFT_IN_SEARCH(s->strut, search) &&
1463                     !STRUT_LEFT_IGNORE(s->strut, us, search))
1464                     l = MAX(l, al + s->strut->left);
1465             }
1466             for (it = struts_top; it; it = g_slist_next(it)) {
1467                 ObScreenStrut *s = it->data;
1468                 if ((s->desktop == d || s->desktop == DESKTOP_ALL) &&
1469                     STRUT_TOP_IN_SEARCH(s->strut, search) &&
1470                     !STRUT_TOP_IGNORE(s->strut, us, search))
1471                     t = MAX(t, at + s->strut->top);
1472             }
1473             for (it = struts_right; it; it = g_slist_next(it)) {
1474                 ObScreenStrut *s = it->data;
1475                 if ((s->desktop == d || s->desktop == DESKTOP_ALL) &&
1476                     STRUT_RIGHT_IN_SEARCH(s->strut, search) &&
1477                     !STRUT_RIGHT_IGNORE(s->strut, us, search))
1478                     r = MIN(r, ar - s->strut->right);
1479             }
1480             for (it = struts_bottom; it; it = g_slist_next(it)) {
1481                 ObScreenStrut *s = it->data;
1482                 if ((s->desktop == d || s->desktop == DESKTOP_ALL) &&
1483                     STRUT_BOTTOM_IN_SEARCH(s->strut, search) &&
1484                     !STRUT_BOTTOM_IGNORE(s->strut, us, search))
1485                     b = MIN(b, ab - s->strut->bottom);
1486             }
1487
1488             /* limit to this monitor */
1489             if (head == i) {
1490                 l = MAX(l, RECT_LEFT(monitor_area[i]));
1491                 t = MAX(t, RECT_TOP(monitor_area[i]));
1492                 r = MIN(r, RECT_RIGHT(monitor_area[i]));
1493                 b = MIN(b, RECT_BOTTOM(monitor_area[i]));
1494             }
1495         }
1496     }
1497
1498     a = g_new(Rect, 1);
1499     a->x = l;
1500     a->y = t;
1501     a->width = r - l + 1;
1502     a->height = b - t + 1;
1503     return a;
1504 }
1505
1506 guint screen_find_monitor(Rect *search)
1507 {
1508     guint i;
1509     guint most = 0;
1510     guint mostv = 0;
1511
1512     for (i = 0; i < screen_num_monitors; ++i) {
1513         Rect *area = screen_physical_area_monitor(i);
1514         if (RECT_INTERSECTS_RECT(*area, *search)) {
1515             Rect r;
1516             guint v;
1517
1518             RECT_SET_INTERSECTION(r, *area, *search);
1519             v = r.width * r.height;
1520
1521             if (v > mostv) {
1522                 mostv = v;
1523                 most = i;
1524             }
1525         }
1526         g_free(area);
1527     }
1528     return most;
1529 }
1530
1531 Rect* screen_physical_area_all_monitors()
1532 {
1533     return screen_physical_area_monitor(screen_num_monitors);
1534 }
1535
1536 Rect* screen_physical_area_monitor(guint head)
1537 {
1538     Rect *a;
1539     g_assert(head <= screen_num_monitors);
1540
1541     a = g_new(Rect, 1);
1542     *a = monitor_area[head];
1543     return a;
1544 }
1545
1546 gboolean screen_physical_area_monitor_contains(guint head, Rect *search)
1547 {
1548     g_assert(head <= screen_num_monitors);
1549     g_assert(search);
1550     return RECT_INTERSECTS_RECT(monitor_area[head], *search);
1551 }
1552
1553 Rect* screen_physical_area_active()
1554 {
1555     Rect *a;
1556     gint x, y;
1557
1558     if (moveresize_client)
1559         a = screen_physical_area_monitor(client_monitor(focus_client));
1560     else if (focus_client)
1561         a = screen_physical_area_monitor(client_monitor(focus_client));
1562     else {
1563         Rect mon;
1564         if (screen_pointer_pos(&x, &y))
1565             RECT_SET(mon, x, y, 1, 1);
1566         else
1567             RECT_SET(mon, 0, 0, 1, 1);
1568         a = screen_physical_area_monitor(screen_find_monitor(&mon));
1569     }
1570     return a;
1571 }
1572
1573 void screen_set_root_cursor()
1574 {
1575     if (sn_app_starting())
1576         XDefineCursor(ob_display, RootWindow(ob_display, ob_screen),
1577                       ob_cursor(OB_CURSOR_BUSYPOINTER));
1578     else
1579         XDefineCursor(ob_display, RootWindow(ob_display, ob_screen),
1580                       ob_cursor(OB_CURSOR_POINTER));
1581 }
1582
1583 gboolean screen_pointer_pos(gint *x, gint *y)
1584 {
1585     Window w;
1586     gint i;
1587     guint u;
1588     gboolean ret;
1589
1590     ret = !!XQueryPointer(ob_display, RootWindow(ob_display, ob_screen),
1591                           &w, &w, x, y, &i, &i, &u);
1592     if (!ret) {
1593         for (i = 0; i < ScreenCount(ob_display); ++i)
1594             if (i != ob_screen)
1595                 if (XQueryPointer(ob_display, RootWindow(ob_display, i),
1596                                   &w, &w, x, y, &i, &i, &u))
1597                     break;
1598     }
1599     return ret;
1600 }