Add a comment for commit ec9fbf05df3ac807d60ae6af36236ffc6567bbdc regarding struts...
[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 "xerror.h"
24 #include "prop.h"
25 #include "grab.h"
26 #include "startupnotify.h"
27 #include "moveresize.h"
28 #include "config.h"
29 #include "mainloop.h"
30 #include "screen.h"
31 #include "client.h"
32 #include "session.h"
33 #include "frame.h"
34 #include "event.h"
35 #include "focus.h"
36 #include "popup.h"
37 #include "extensions.h"
38 #include "render/render.h"
39 #include "gettext.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 = 0;
61 guint           screen_desktop;
62 guint           screen_last_desktop;
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 an 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 = NULL;
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         xerror_set_ignore(TRUE);
107         xerror_occured = FALSE;
108
109         /* We want to find out when the current selection owner dies */
110         XSelectInput(ob_display, current_wm_sn_owner, StructureNotifyMask);
111         XSync(ob_display, FALSE);
112
113         xerror_set_ignore(FALSE);
114         if (xerror_occured)
115             current_wm_sn_owner = None;
116     }
117
118     timestamp = event_get_server_time();
119
120     XSetSelectionOwner(ob_display, wm_sn_atom, screen_support_win,
121                        timestamp);
122
123     if (XGetSelectionOwner(ob_display, wm_sn_atom) != screen_support_win) {
124         g_message(_("Could not acquire window manager selection on screen %d"),
125                   ob_screen);
126         return FALSE;
127     }
128
129     /* Wait for old window manager to go away */
130     if (current_wm_sn_owner) {
131       XEvent event;
132       gulong wait = 0;
133       const gulong timeout = G_USEC_PER_SEC * 15; /* wait for 15s max */
134
135       while (wait < timeout) {
136           if (XCheckWindowEvent(ob_display, current_wm_sn_owner,
137                                 StructureNotifyMask, &event) &&
138               event.type == DestroyNotify)
139               break;
140           g_usleep(G_USEC_PER_SEC / 10);
141           wait += G_USEC_PER_SEC / 10;
142       }
143
144       if (wait >= timeout) {
145           g_message(_("The WM on screen %d is not exiting"), ob_screen);
146           return FALSE;
147       }
148     }
149
150     /* Send client message indicating that we are now the WM */
151     prop_message(RootWindow(ob_display, ob_screen), prop_atoms.manager,
152                  timestamp, wm_sn_atom, screen_support_win, 0,
153                  SubstructureNotifyMask);
154
155     return TRUE;
156 }
157
158 gboolean screen_annex(void)
159 {
160     XSetWindowAttributes attrib;
161     pid_t pid;
162     gint i, num_support;
163     Atom *prop_atoms_start, *wm_supported_pos;
164     gulong *supported;
165
166     /* create the netwm support window */
167     attrib.override_redirect = TRUE;
168     attrib.event_mask = PropertyChangeMask;
169     screen_support_win = XCreateWindow(ob_display,
170                                        RootWindow(ob_display, ob_screen),
171                                        -100, -100, 1, 1, 0,
172                                        CopyFromParent, InputOutput,
173                                        CopyFromParent,
174                                        CWEventMask | CWOverrideRedirect,
175                                        &attrib);
176     XMapWindow(ob_display, screen_support_win);
177     XLowerWindow(ob_display, screen_support_win);
178
179     if (!replace_wm()) {
180         XDestroyWindow(ob_display, screen_support_win);
181         return FALSE;
182     }
183
184     xerror_set_ignore(TRUE);
185     xerror_occured = FALSE;
186     XSelectInput(ob_display, RootWindow(ob_display, ob_screen),
187                  ROOT_EVENTMASK);
188     xerror_set_ignore(FALSE);
189     if (xerror_occured) {
190         g_message(_("A window manager is already running on screen %d"),
191                   ob_screen);
192
193         XDestroyWindow(ob_display, screen_support_win);
194         return FALSE;
195     }
196
197     screen_set_root_cursor();
198
199     /* set the OPENBOX_PID hint */
200     pid = getpid();
201     PROP_SET32(RootWindow(ob_display, ob_screen),
202                openbox_pid, cardinal, pid);
203
204     /* set supporting window */
205     PROP_SET32(RootWindow(ob_display, ob_screen),
206                net_supporting_wm_check, window, screen_support_win);
207
208     /* set properties on the supporting window */
209     PROP_SETS(screen_support_win, net_wm_name, "Openbox");
210     PROP_SET32(screen_support_win, net_supporting_wm_check,
211                window, screen_support_win);
212
213     /* set the _NET_SUPPORTED_ATOMS hint */
214
215     /* this is all the atoms after net_supported in the prop_atoms struct */
216     prop_atoms_start = (Atom*)&prop_atoms;
217     wm_supported_pos = (Atom*)&(prop_atoms.net_supported);
218     num_support = sizeof(prop_atoms) / sizeof(Atom) -
219         (wm_supported_pos - prop_atoms_start) - 1;
220     i = 0;
221     supported = g_new(gulong, num_support);
222     supported[i++] = prop_atoms.net_supporting_wm_check;
223     supported[i++] = prop_atoms.net_wm_full_placement;
224     supported[i++] = prop_atoms.net_current_desktop;
225     supported[i++] = prop_atoms.net_number_of_desktops;
226     supported[i++] = prop_atoms.net_desktop_geometry;
227     supported[i++] = prop_atoms.net_desktop_viewport;
228     supported[i++] = prop_atoms.net_active_window;
229     supported[i++] = prop_atoms.net_workarea;
230     supported[i++] = prop_atoms.net_client_list;
231     supported[i++] = prop_atoms.net_client_list_stacking;
232     supported[i++] = prop_atoms.net_desktop_names;
233     supported[i++] = prop_atoms.net_close_window;
234     supported[i++] = prop_atoms.net_desktop_layout;
235     supported[i++] = prop_atoms.net_showing_desktop;
236     supported[i++] = prop_atoms.net_wm_name;
237     supported[i++] = prop_atoms.net_wm_visible_name;
238     supported[i++] = prop_atoms.net_wm_icon_name;
239     supported[i++] = prop_atoms.net_wm_visible_icon_name;
240     supported[i++] = prop_atoms.net_wm_desktop;
241     supported[i++] = prop_atoms.net_wm_strut;
242     supported[i++] = prop_atoms.net_wm_strut_partial;
243     supported[i++] = prop_atoms.net_wm_icon;
244     supported[i++] = prop_atoms.net_wm_icon_geometry;
245     supported[i++] = prop_atoms.net_wm_window_type;
246     supported[i++] = prop_atoms.net_wm_window_type_desktop;
247     supported[i++] = prop_atoms.net_wm_window_type_dock;
248     supported[i++] = prop_atoms.net_wm_window_type_toolbar;
249     supported[i++] = prop_atoms.net_wm_window_type_menu;
250     supported[i++] = prop_atoms.net_wm_window_type_utility;
251     supported[i++] = prop_atoms.net_wm_window_type_splash;
252     supported[i++] = prop_atoms.net_wm_window_type_dialog;
253     supported[i++] = prop_atoms.net_wm_window_type_normal;
254     supported[i++] = prop_atoms.net_wm_allowed_actions;
255     supported[i++] = prop_atoms.net_wm_action_move;
256     supported[i++] = prop_atoms.net_wm_action_resize;
257     supported[i++] = prop_atoms.net_wm_action_minimize;
258     supported[i++] = prop_atoms.net_wm_action_shade;
259     supported[i++] = prop_atoms.net_wm_action_maximize_horz;
260     supported[i++] = prop_atoms.net_wm_action_maximize_vert;
261     supported[i++] = prop_atoms.net_wm_action_fullscreen;
262     supported[i++] = prop_atoms.net_wm_action_change_desktop;
263     supported[i++] = prop_atoms.net_wm_action_close;
264     supported[i++] = prop_atoms.net_wm_action_above;
265     supported[i++] = prop_atoms.net_wm_action_below;
266     supported[i++] = prop_atoms.net_wm_state;
267     supported[i++] = prop_atoms.net_wm_state_modal;
268     supported[i++] = prop_atoms.net_wm_state_maximized_vert;
269     supported[i++] = prop_atoms.net_wm_state_maximized_horz;
270     supported[i++] = prop_atoms.net_wm_state_shaded;
271     supported[i++] = prop_atoms.net_wm_state_skip_taskbar;
272     supported[i++] = prop_atoms.net_wm_state_skip_pager;
273     supported[i++] = prop_atoms.net_wm_state_hidden;
274     supported[i++] = prop_atoms.net_wm_state_fullscreen;
275     supported[i++] = prop_atoms.net_wm_state_above;
276     supported[i++] = prop_atoms.net_wm_state_below;
277     supported[i++] = prop_atoms.net_wm_state_demands_attention;
278     supported[i++] = prop_atoms.net_moveresize_window;
279     supported[i++] = prop_atoms.net_wm_moveresize;
280     supported[i++] = prop_atoms.net_wm_user_time;
281 /*
282     supported[i++] = prop_atoms.net_wm_user_time_window;
283 */
284     supported[i++] = prop_atoms.net_frame_extents;
285     supported[i++] = prop_atoms.net_request_frame_extents;
286     supported[i++] = prop_atoms.net_restack_window;
287     supported[i++] = prop_atoms.net_startup_id;
288 #ifdef SYNC
289     supported[i++] = prop_atoms.net_wm_sync_request;
290     supported[i++] = prop_atoms.net_wm_sync_request_counter;
291 #endif
292     supported[i++] = prop_atoms.net_wm_pid;
293     supported[i++] = prop_atoms.net_wm_ping;
294
295     supported[i++] = prop_atoms.kde_wm_change_state;
296     supported[i++] = prop_atoms.kde_net_wm_frame_strut;
297     supported[i++] = prop_atoms.kde_net_wm_window_type_override;
298
299     supported[i++] = prop_atoms.ob_wm_action_undecorate;
300     supported[i++] = prop_atoms.ob_wm_state_undecorated;
301     supported[i++] = prop_atoms.openbox_pid;
302     supported[i++] = prop_atoms.ob_theme;
303     supported[i++] = prop_atoms.ob_config_file;
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(void)
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     if (reconfig) {
357         guint i;
358
359         /* recreate the pager popups to use any new theme stuff. it was
360            freed in screen_shutdown() already. */
361         desktop_popup = g_new(ObPagerPopup*, screen_num_monitors);
362         for (i = 0; i < screen_num_monitors; i++) {
363             desktop_popup[i] = pager_popup_new();
364             pager_popup_height(desktop_popup[i], POPUP_HEIGHT);
365             pager_popup_text_width_to_strings(desktop_popup[i],
366                                               screen_desktop_names,
367                                               screen_num_desktops);
368         }
369
370         return;
371     }
372
373     /* get the initial size */
374     screen_resize();
375
376     /* have names already been set for the desktops? */
377     if (PROP_GETSS(RootWindow(ob_display, ob_screen),
378                    net_desktop_names, utf8, &names))
379     {
380         g_strfreev(names);
381         namesexist = TRUE;
382     }
383
384     /* if names don't exist and we have session names, set those.
385        do this stuff BEFORE setting the number of desktops, because that
386        will create default names for them
387     */
388     if (!namesexist && session_desktop_names != NULL) {
389         guint i, numnames;
390         GSList *it;
391
392         /* get the desktop names */
393         numnames = g_slist_length(session_desktop_names);
394         names = g_new(gchar*, numnames + 1);
395         names[numnames] = NULL;
396         for (i = 0, it = session_desktop_names; it; ++i, it = g_slist_next(it))
397             names[i] = g_strdup(it->data);
398
399         /* set the root window property */
400         PROP_SETSS(RootWindow(ob_display, ob_screen), net_desktop_names,names);
401
402         g_strfreev(names);
403     }
404
405     /* set the number of desktops, if it's not already set.
406
407        this will also set the default names from the config file up for
408        desktops that don't have names yet */
409     screen_num_desktops = 0;
410     if (PROP_GET32(RootWindow(ob_display, ob_screen),
411                    net_number_of_desktops, cardinal, &d))
412     {
413         if (d != config_desktops_num) {
414             /* TRANSLATORS: If you need to specify a different order of the
415                arguments, you can use %1$d for the first one and %2$d for the
416                second one. For example,
417                "The current session has %2$d desktops, but Openbox is configured for %1$d ..." */
418             g_warning(ngettext("Openbox is configured for %d desktop, but the current session has %d.  Overriding the Openbox configuration.", "Openbox is configured for %d desktops, but the current session has %d.  Overriding the Openbox configuration.", config_desktops_num),
419                       config_desktops_num, d);
420         }
421         screen_set_num_desktops(d);
422     }
423     /* restore from session if possible */
424     else if (session_num_desktops)
425         screen_set_num_desktops(session_num_desktops);
426     else
427         screen_set_num_desktops(config_desktops_num);
428
429     screen_desktop = screen_num_desktops;  /* something invalid */
430     /* start on the current desktop when a wm was already running */
431     if (PROP_GET32(RootWindow(ob_display, ob_screen),
432                    net_current_desktop, cardinal, &d) &&
433         d < screen_num_desktops)
434     {
435         screen_set_desktop(d, FALSE);
436     } else if (session_desktop >= 0)
437         screen_set_desktop(MIN((guint)session_desktop,
438                                screen_num_desktops), FALSE);
439     else
440         screen_set_desktop(MIN(config_screen_firstdesk,
441                                screen_num_desktops) - 1, FALSE);
442     screen_last_desktop = screen_desktop;
443
444     /* don't start in showing-desktop mode */
445     screen_showing_desktop = FALSE;
446     PROP_SET32(RootWindow(ob_display, ob_screen),
447                net_showing_desktop, cardinal, screen_showing_desktop);
448
449     if (session_desktop_layout_present &&
450         screen_validate_layout(&session_desktop_layout))
451     {
452         screen_desktop_layout = session_desktop_layout;
453     }
454     else
455         screen_update_layout();
456 }
457
458 void screen_shutdown(gboolean reconfig)
459 {
460     guint i;
461
462     for (i = 0; i < screen_num_monitors; i++)
463         pager_popup_free(desktop_popup[i]);
464     g_free(desktop_popup);
465     desktop_popup = NULL;
466
467     if (reconfig)
468         return;
469
470     XSelectInput(ob_display, RootWindow(ob_display, ob_screen),
471                  NoEventMask);
472
473     /* we're not running here no more! */
474     PROP_ERASE(RootWindow(ob_display, ob_screen), openbox_pid);
475     /* not without us */
476     PROP_ERASE(RootWindow(ob_display, ob_screen), net_supported);
477     /* don't keep this mode */
478     PROP_ERASE(RootWindow(ob_display, ob_screen), net_showing_desktop);
479
480     XDestroyWindow(ob_display, screen_support_win);
481
482     g_strfreev(screen_desktop_names);
483     screen_desktop_names = NULL;
484 }
485
486 void screen_resize(void)
487 {
488     static gint oldw = 0, oldh = 0;
489     gint w, h;
490     GList *it;
491     gulong geometry[2];
492
493     w = WidthOfScreen(ScreenOfDisplay(ob_display, ob_screen));
494     h = HeightOfScreen(ScreenOfDisplay(ob_display, ob_screen));
495
496     if (w == oldw && h == oldh) return;
497
498     oldw = w; oldh = h;
499
500     /* Set the _NET_DESKTOP_GEOMETRY hint */
501     screen_physical_size.width = geometry[0] = w;
502     screen_physical_size.height = geometry[1] = h;
503     PROP_SETA32(RootWindow(ob_display, ob_screen),
504                 net_desktop_geometry, cardinal, geometry, 2);
505
506     if (ob_state() != OB_STATE_RUNNING)
507         return;
508
509     screen_update_areas();
510     dock_configure();
511
512     /* make sure all windows are visible */
513     for (it = client_list; it; it = g_list_next(it))
514         client_move_onscreen(it->data, FALSE);
515 }
516
517 void screen_set_num_desktops(guint num)
518 {
519     guint old;
520     gulong *viewport;
521     GList *it, *stacking_copy;
522
523     g_assert(num > 0);
524
525     if (screen_num_desktops == num) return;
526
527     old = screen_num_desktops;
528     screen_num_desktops = num;
529     PROP_SET32(RootWindow(ob_display, ob_screen),
530                net_number_of_desktops, cardinal, num);
531
532     /* set the viewport hint */
533     viewport = g_new0(gulong, num * 2);
534     PROP_SETA32(RootWindow(ob_display, ob_screen),
535                 net_desktop_viewport, cardinal, viewport, num * 2);
536     g_free(viewport);
537
538     /* the number of rows/columns will differ */
539     screen_update_layout();
540
541     /* move windows on desktops that will no longer exist!
542        make a copy of the list cuz we're changing it */
543     stacking_copy = g_list_copy(stacking_list);
544     for (it = g_list_last(stacking_copy); it; it = g_list_previous(it)) {
545         if (WINDOW_IS_CLIENT(it->data)) {
546             ObClient *c = it->data;
547             if (c->desktop != DESKTOP_ALL && c->desktop >= num)
548                 client_set_desktop(c, num - 1, FALSE, TRUE);
549             /* raise all the windows that are on the current desktop which
550                is being merged */
551             else if (screen_desktop == num - 1 &&
552                      (c->desktop == DESKTOP_ALL ||
553                       c->desktop == screen_desktop))
554                 stacking_raise(CLIENT_AS_WINDOW(c));
555         }
556     }
557     g_list_free(stacking_copy);
558
559     /* change our struts/area to match (after moving windows) */
560     screen_update_areas();
561
562     /* may be some unnamed desktops that we need to fill in with names
563        (after updating the areas so the popup can resize) */
564     screen_update_desktop_names();
565
566     /* change our desktop if we're on one that no longer exists! */
567     if (screen_desktop >= screen_num_desktops)
568         screen_set_desktop(num - 1, TRUE);
569 }
570
571 static void screen_fallback_focus(void)
572 {
573     ObClient *c;
574     gboolean allow_omni;
575
576     /* only allow omnipresent windows to get focus on desktop change if
577        an omnipresent window is already focused (it'll keep focus probably, but
578        maybe not depending on mouse-focus options) */
579     allow_omni = focus_client && (client_normal(focus_client) &&
580                                   focus_client->desktop == DESKTOP_ALL);
581
582     /* the client moved there already so don't move focus. prevent flicker
583        on sendtodesktop + follow */
584     if (focus_client && focus_client->desktop == screen_desktop)
585         return;
586
587     /* have to try focus here because when you leave an empty desktop
588        there is no focus out to watch for. also, we have different rules
589        here. we always allow it to look under the mouse pointer if
590        config_focus_last is FALSE
591
592        do this before hiding the windows so if helper windows are coming
593        with us, they don't get hidden
594     */
595     if ((c = focus_fallback(TRUE, !config_focus_last, allow_omni,
596                             !allow_omni)))
597     {
598         /* only do the flicker reducing stuff ahead of time if we are going
599            to call xsetinputfocus on the window ourselves. otherwise there is
600            no guarantee the window will actually take focus.. */
601         if (c->can_focus) {
602             /* reduce flicker by hiliting now rather than waiting for the
603                server FocusIn event */
604             frame_adjust_focus(c->frame, TRUE);
605             /* do this here so that if you switch desktops to a window with
606                helper windows then the helper windows won't flash */
607             client_bring_helper_windows(c);
608         }
609     }
610 }
611
612 static gboolean last_desktop_func(gpointer data)
613 {
614     screen_desktop_timeout = TRUE;
615     return FALSE;
616 }
617
618 void screen_set_desktop(guint num, gboolean dofocus)
619 {
620     GList *it;
621     guint previous;
622     gulong ignore_start;
623
624     g_assert(num < screen_num_desktops);
625
626     previous = screen_desktop;
627     screen_desktop = num;
628
629     if (previous == num) return;
630
631     PROP_SET32(RootWindow(ob_display, ob_screen),
632                net_current_desktop, cardinal, num);
633
634     /* This whole thing decides when/how to save the screen_last_desktop so
635        that it can be restored later if you want */
636     if (screen_desktop_timeout) {
637         /* If screen_desktop_timeout is true, then we've been on this desktop
638            long enough and we can save it as the last desktop. */
639
640         if (screen_last_desktop == previous)
641             /* this is the startup state only */
642             screen_old_desktop = screen_desktop;
643         else {
644             /* save the "last desktop" as the "old desktop" */
645             screen_old_desktop = screen_last_desktop;
646             /* save the desktop we're coming from as the "last desktop" */
647             screen_last_desktop = previous;
648         }
649     }
650     else {
651         /* If screen_desktop_timeout is false, then we just got to this desktop
652            and we are moving away again. */
653
654         if (screen_desktop == screen_last_desktop) {
655             /* If we are moving to the "last desktop" .. */
656             if (previous == screen_old_desktop) {
657                 /* .. from the "old desktop", change the last desktop to
658                    be where we are coming from */
659                 screen_last_desktop = screen_old_desktop;
660             }
661             else if (screen_last_desktop == screen_old_desktop) {
662                 /* .. and also to the "old desktop", change the "last
663                    desktop" to be where we are coming from */
664                 screen_last_desktop = previous;
665             }
666             else {
667                 /* .. from some other desktop, then set the "last desktop" to
668                    be the saved "old desktop", i.e. where we were before the
669                    "last desktop" */
670                 screen_last_desktop = screen_old_desktop;
671             }
672         }
673         else {
674             /* If we are moving to any desktop besides the "last desktop"..
675                (this is the normal case) */
676             if (screen_desktop == screen_old_desktop) {
677                 /* If moving to the "old desktop", which is not the
678                    "last desktop", don't save anything */
679             }
680             else if (previous == screen_old_desktop) {
681                 /* If moving from the "old desktop", and not to the
682                    "last desktop", don't save anything */
683             }
684             else if (screen_last_desktop == screen_old_desktop) {
685                 /* If the "last desktop" is the same as "old desktop" and
686                    you're not moving to the "last desktop" then save where
687                    we're coming from as the "last desktop" */
688                 screen_last_desktop = previous;
689             }
690             else {
691                 /* If the "last desktop" is different from the "old desktop"
692                    and you're not moving to the "last desktop", then don't save
693                    anything */
694             }
695         }
696     }
697     screen_desktop_timeout = FALSE;
698     ob_main_loop_timeout_remove(ob_main_loop, last_desktop_func);
699     ob_main_loop_timeout_add(ob_main_loop, REMEMBER_LAST_DESKTOP_TIME,
700                              last_desktop_func, NULL, NULL, NULL);
701
702     ob_debug("Moving to desktop %d\n", num+1);
703
704     if (ob_state() == OB_STATE_RUNNING)
705         screen_show_desktop_popup(screen_desktop);
706
707     /* ignore enter events caused by the move */
708     ignore_start = event_start_ignore_all_enters();
709
710     if (moveresize_client)
711         client_set_desktop(moveresize_client, num, TRUE, FALSE);
712
713     /* show windows before hiding the rest to lessen the enter/leave events */
714
715     /* show windows from top to bottom */
716     for (it = stacking_list; it; it = g_list_next(it)) {
717         if (WINDOW_IS_CLIENT(it->data)) {
718             ObClient *c = it->data;
719             client_show(c);
720         }
721     }
722
723     if (dofocus) screen_fallback_focus();
724
725     /* hide windows from bottom to top */
726     for (it = g_list_last(stacking_list); it; it = g_list_previous(it)) {
727         if (WINDOW_IS_CLIENT(it->data)) {
728             ObClient *c = it->data;
729             client_hide(c);
730         }
731     }
732
733     event_end_ignore_all_enters(ignore_start);
734
735     if (event_curtime != CurrentTime)
736         screen_desktop_user_time = event_curtime;
737 }
738
739 void screen_add_desktop(gboolean current)
740 {
741     gulong ignore_start;
742
743     /* ignore enter events caused by this */
744     ignore_start = event_start_ignore_all_enters();
745
746     screen_set_num_desktops(screen_num_desktops+1);
747
748     /* move all the clients over */
749     if (current) {
750         GList *it;
751
752         for (it = client_list; it; it = g_list_next(it)) {
753             ObClient *c = it->data;
754             if (c->desktop != DESKTOP_ALL && c->desktop >= screen_desktop &&
755                 /* don't move direct children, they'll be moved with their
756                    parent - which will have to be on the same desktop */
757                 !client_direct_parent(c))
758             {
759                 ob_debug("moving window %s\n", c->title);
760                 client_set_desktop(c, c->desktop+1, FALSE, TRUE);
761             }
762         }
763     }
764
765     event_end_ignore_all_enters(ignore_start);
766 }
767
768 void screen_remove_desktop(gboolean current)
769 {
770     guint rmdesktop, movedesktop;
771     GList *it, *stacking_copy;
772     gulong ignore_start;
773
774     if (screen_num_desktops <= 1) return;
775
776     /* ignore enter events caused by this */
777     ignore_start = event_start_ignore_all_enters();
778
779     /* what desktop are we removing and moving to? */
780     if (current)
781         rmdesktop = screen_desktop;
782     else
783         rmdesktop = screen_num_desktops - 1;
784     if (rmdesktop < screen_num_desktops - 1)
785         movedesktop = rmdesktop + 1;
786     else
787         movedesktop = rmdesktop;
788
789     /* make a copy of the list cuz we're changing it */
790     stacking_copy = g_list_copy(stacking_list);
791     for (it = g_list_last(stacking_copy); it; it = g_list_previous(it)) {
792         if (WINDOW_IS_CLIENT(it->data)) {
793             ObClient *c = it->data;
794             guint d = c->desktop;
795             if (d != DESKTOP_ALL && d >= movedesktop &&
796                 /* don't move direct children, they'll be moved with their
797                    parent - which will have to be on the same desktop */
798                 !client_direct_parent(c))
799             {
800                 ob_debug("moving window %s\n", c->title);
801                 client_set_desktop(c, c->desktop - 1, TRUE, TRUE);
802             }
803             /* raise all the windows that are on the current desktop which
804                is being merged */
805             if ((screen_desktop == rmdesktop - 1 ||
806                  screen_desktop == rmdesktop) &&
807                 (d == DESKTOP_ALL || d == screen_desktop))
808             {
809                 stacking_raise(CLIENT_AS_WINDOW(c));
810                 ob_debug("raising window %s\n", c->title);
811             }
812         }
813     }
814     g_list_free(stacking_copy);
815
816     /* fallback focus like we're changing desktops */
817     if (screen_desktop < screen_num_desktops - 1) {
818         screen_fallback_focus();
819         ob_debug("fake desktop change\n");
820     }
821
822     screen_set_num_desktops(screen_num_desktops-1);
823
824     event_end_ignore_all_enters(ignore_start);
825 }
826
827 static void get_row_col(guint d, guint *r, guint *c)
828 {
829     switch (screen_desktop_layout.orientation) {
830     case OB_ORIENTATION_HORZ:
831         switch (screen_desktop_layout.start_corner) {
832         case OB_CORNER_TOPLEFT:
833             *r = d / screen_desktop_layout.columns;
834             *c = d % screen_desktop_layout.columns;
835             break;
836         case OB_CORNER_BOTTOMLEFT:
837             *r = screen_desktop_layout.rows - 1 -
838                 d / screen_desktop_layout.columns;
839             *c = d % screen_desktop_layout.columns;
840             break;
841         case OB_CORNER_TOPRIGHT:
842             *r = d / screen_desktop_layout.columns;
843             *c = screen_desktop_layout.columns - 1 -
844                 d % screen_desktop_layout.columns;
845             break;
846         case OB_CORNER_BOTTOMRIGHT:
847             *r = screen_desktop_layout.rows - 1 -
848                 d / screen_desktop_layout.columns;
849             *c = screen_desktop_layout.columns - 1 -
850                 d % screen_desktop_layout.columns;
851             break;
852         }
853         break;
854     case OB_ORIENTATION_VERT:
855         switch (screen_desktop_layout.start_corner) {
856         case OB_CORNER_TOPLEFT:
857             *r = d % screen_desktop_layout.rows;
858             *c = d / screen_desktop_layout.rows;
859             break;
860         case OB_CORNER_BOTTOMLEFT:
861             *r = screen_desktop_layout.rows - 1 -
862                 d % screen_desktop_layout.rows;
863             *c = d / screen_desktop_layout.rows;
864             break;
865         case OB_CORNER_TOPRIGHT:
866             *r = d % screen_desktop_layout.rows;
867             *c = screen_desktop_layout.columns - 1 -
868                 d / screen_desktop_layout.rows;
869             break;
870         case OB_CORNER_BOTTOMRIGHT:
871             *r = screen_desktop_layout.rows - 1 -
872                 d % screen_desktop_layout.rows;
873             *c = screen_desktop_layout.columns - 1 -
874                 d / screen_desktop_layout.rows;
875             break;
876         }
877         break;
878     }
879 }
880
881 static guint translate_row_col(guint r, guint c)
882 {
883     switch (screen_desktop_layout.orientation) {
884     case OB_ORIENTATION_HORZ:
885         switch (screen_desktop_layout.start_corner) {
886         case OB_CORNER_TOPLEFT:
887             return r % screen_desktop_layout.rows *
888                 screen_desktop_layout.columns +
889                 c % screen_desktop_layout.columns;
890         case OB_CORNER_BOTTOMLEFT:
891             return (screen_desktop_layout.rows - 1 -
892                     r % screen_desktop_layout.rows) *
893                 screen_desktop_layout.columns +
894                 c % screen_desktop_layout.columns;
895         case OB_CORNER_TOPRIGHT:
896             return r % screen_desktop_layout.rows *
897                 screen_desktop_layout.columns +
898                 (screen_desktop_layout.columns - 1 -
899                  c % screen_desktop_layout.columns);
900         case OB_CORNER_BOTTOMRIGHT:
901             return (screen_desktop_layout.rows - 1 -
902                     r % screen_desktop_layout.rows) *
903                 screen_desktop_layout.columns +
904                 (screen_desktop_layout.columns - 1 -
905                  c % screen_desktop_layout.columns);
906         }
907     case OB_ORIENTATION_VERT:
908         switch (screen_desktop_layout.start_corner) {
909         case OB_CORNER_TOPLEFT:
910             return c % screen_desktop_layout.columns *
911                 screen_desktop_layout.rows +
912                 r % screen_desktop_layout.rows;
913         case OB_CORNER_BOTTOMLEFT:
914             return c % screen_desktop_layout.columns *
915                 screen_desktop_layout.rows +
916                 (screen_desktop_layout.rows - 1 -
917                  r % screen_desktop_layout.rows);
918         case OB_CORNER_TOPRIGHT:
919             return (screen_desktop_layout.columns - 1 -
920                     c % screen_desktop_layout.columns) *
921                 screen_desktop_layout.rows +
922                 r % screen_desktop_layout.rows;
923         case OB_CORNER_BOTTOMRIGHT:
924             return (screen_desktop_layout.columns - 1 -
925                     c % screen_desktop_layout.columns) *
926                 screen_desktop_layout.rows +
927                 (screen_desktop_layout.rows - 1 -
928                  r % screen_desktop_layout.rows);
929         }
930     }
931     g_assert_not_reached();
932     return 0;
933 }
934
935 static gboolean hide_desktop_popup_func(gpointer data)
936 {
937     guint i;
938
939     for (i = 0; i < screen_num_monitors; i++) {
940         pager_popup_hide(desktop_popup[i]);
941     }
942     return FALSE; /* don't repeat */
943 }
944
945 void screen_show_desktop_popup(guint d)
946 {
947     Rect *a;
948     guint i;
949
950     /* 0 means don't show the popup */
951     if (!config_desktop_popup_time) return;
952
953     for (i = 0; i < screen_num_monitors; i++) {
954         a = screen_physical_area_monitor(i);
955         pager_popup_position(desktop_popup[i], CenterGravity,
956                              a->x + a->width / 2, a->y + a->height / 2);
957         pager_popup_icon_size_multiplier(desktop_popup[i],
958                                          (screen_desktop_layout.columns /
959                                           screen_desktop_layout.rows) / 2,
960                                          (screen_desktop_layout.rows/
961                                           screen_desktop_layout.columns) / 2);
962         pager_popup_max_width(desktop_popup[i],
963                               MAX(a->width/3, POPUP_WIDTH));
964         pager_popup_show(desktop_popup[i], screen_desktop_names[d], d);
965
966         ob_main_loop_timeout_remove(ob_main_loop, hide_desktop_popup_func);
967         ob_main_loop_timeout_add(ob_main_loop, config_desktop_popup_time * 1000,
968                                  hide_desktop_popup_func, desktop_popup[i],
969                                  g_direct_equal, NULL);
970         g_free(a);
971     }
972 }
973
974 void screen_hide_desktop_popup(void)
975 {
976     guint i;
977
978     for (i = 0; i < screen_num_monitors; i++) {
979         ob_main_loop_timeout_remove_data(ob_main_loop, hide_desktop_popup_func,
980                                          desktop_popup[i], FALSE);
981         pager_popup_hide(desktop_popup[i]);
982     }
983 }
984
985 guint screen_find_desktop(guint from, ObDirection dir,
986                           gboolean wrap, gboolean linear)
987 {
988     guint r, c;
989     guint d;
990
991     d = from;
992     get_row_col(d, &r, &c);
993     if (linear) {
994         switch (dir) {
995         case OB_DIRECTION_EAST:
996             if (d < screen_num_desktops - 1)
997                 ++d;
998             else if (wrap)
999                 d = 0;
1000             else
1001                 return from;
1002             break;
1003         case OB_DIRECTION_WEST:
1004             if (d > 0)
1005                 --d;
1006             else if (wrap)
1007                 d = screen_num_desktops - 1;
1008             else
1009                 return from;
1010             break;
1011         default:
1012             g_assert_not_reached();
1013             return from;
1014         }
1015     } else {
1016         switch (dir) {
1017         case OB_DIRECTION_EAST:
1018             ++c;
1019             if (c >= screen_desktop_layout.columns) {
1020                 if (wrap)
1021                     c = 0;
1022                 else
1023                     return from;
1024             }
1025             d = translate_row_col(r, c);
1026             if (d >= screen_num_desktops) {
1027                 if (wrap)
1028                     ++c;
1029                 else
1030                     return from;
1031             }
1032             break;
1033         case OB_DIRECTION_WEST:
1034             --c;
1035             if (c >= screen_desktop_layout.columns) {
1036                 if (wrap)
1037                     c = screen_desktop_layout.columns - 1;
1038                 else
1039                     return from;
1040             }
1041             d = translate_row_col(r, c);
1042             if (d >= screen_num_desktops) {
1043                 if (wrap)
1044                     --c;
1045                 else
1046                     return from;
1047             }
1048             break;
1049         case OB_DIRECTION_SOUTH:
1050             ++r;
1051             if (r >= screen_desktop_layout.rows) {
1052                 if (wrap)
1053                     r = 0;
1054                 else
1055                     return from;
1056             }
1057             d = translate_row_col(r, c);
1058             if (d >= screen_num_desktops) {
1059                 if (wrap)
1060                     ++r;
1061                 else
1062                     return from;
1063             }
1064             break;
1065         case OB_DIRECTION_NORTH:
1066             --r;
1067             if (r >= screen_desktop_layout.rows) {
1068                 if (wrap)
1069                     r = screen_desktop_layout.rows - 1;
1070                 else
1071                     return from;
1072             }
1073             d = translate_row_col(r, c);
1074             if (d >= screen_num_desktops) {
1075                 if (wrap)
1076                     --r;
1077                 else
1078                     return from;
1079             }
1080             break;
1081         default:
1082             g_assert_not_reached();
1083             return from;
1084         }
1085
1086         d = translate_row_col(r, c);
1087     }
1088     return d;
1089 }
1090
1091 static gboolean screen_validate_layout(ObDesktopLayout *l)
1092 {
1093     if (l->columns == 0 && l->rows == 0) /* both 0's is bad data.. */
1094         return FALSE;
1095
1096     /* fill in a zero rows/columns */
1097     if (l->columns == 0) {
1098         l->columns = screen_num_desktops / l->rows;
1099         if (l->rows * l->columns < screen_num_desktops)
1100             l->columns++;
1101         if (l->rows * l->columns >= screen_num_desktops + l->columns)
1102             l->rows--;
1103     } else if (l->rows == 0) {
1104         l->rows = screen_num_desktops / l->columns;
1105         if (l->columns * l->rows < screen_num_desktops)
1106             l->rows++;
1107         if (l->columns * l->rows >= screen_num_desktops + l->rows)
1108             l->columns--;
1109     }
1110
1111     /* bounds checking */
1112     if (l->orientation == OB_ORIENTATION_HORZ) {
1113         l->columns = MIN(screen_num_desktops, l->columns);
1114         l->rows = MIN(l->rows,
1115                       (screen_num_desktops + l->columns - 1) / l->columns);
1116         l->columns = screen_num_desktops / l->rows +
1117             !!(screen_num_desktops % l->rows);
1118     } else {
1119         l->rows = MIN(screen_num_desktops, l->rows);
1120         l->columns = MIN(l->columns,
1121                          (screen_num_desktops + l->rows - 1) / l->rows);
1122         l->rows = screen_num_desktops / l->columns +
1123             !!(screen_num_desktops % l->columns);
1124     }
1125     return TRUE;
1126 }
1127
1128 void screen_update_layout(void)
1129
1130 {
1131     ObDesktopLayout l;
1132     guint32 *data;
1133     guint num;
1134
1135     screen_desktop_layout.orientation = OB_ORIENTATION_HORZ;
1136     screen_desktop_layout.start_corner = OB_CORNER_TOPLEFT;
1137     screen_desktop_layout.rows = 1;
1138     screen_desktop_layout.columns = screen_num_desktops;
1139
1140     if (PROP_GETA32(RootWindow(ob_display, ob_screen),
1141                     net_desktop_layout, cardinal, &data, &num)) {
1142         if (num == 3 || num == 4) {
1143
1144             if (data[0] == prop_atoms.net_wm_orientation_vert)
1145                 l.orientation = OB_ORIENTATION_VERT;
1146             else if (data[0] == prop_atoms.net_wm_orientation_horz)
1147                 l.orientation = OB_ORIENTATION_HORZ;
1148             else
1149                 return;
1150
1151             if (num < 4)
1152                 l.start_corner = OB_CORNER_TOPLEFT;
1153             else {
1154                 if (data[3] == prop_atoms.net_wm_topleft)
1155                     l.start_corner = OB_CORNER_TOPLEFT;
1156                 else if (data[3] == prop_atoms.net_wm_topright)
1157                     l.start_corner = OB_CORNER_TOPRIGHT;
1158                 else if (data[3] == prop_atoms.net_wm_bottomright)
1159                     l.start_corner = OB_CORNER_BOTTOMRIGHT;
1160                 else if (data[3] == prop_atoms.net_wm_bottomleft)
1161                     l.start_corner = OB_CORNER_BOTTOMLEFT;
1162                 else
1163                     return;
1164             }
1165
1166             l.columns = data[1];
1167             l.rows = data[2];
1168
1169             if (screen_validate_layout(&l))
1170                 screen_desktop_layout = l;
1171
1172             g_free(data);
1173         }
1174     }
1175 }
1176
1177 void screen_update_desktop_names(void)
1178 {
1179     guint i;
1180
1181     /* empty the array */
1182     g_strfreev(screen_desktop_names);
1183     screen_desktop_names = NULL;
1184
1185     if (PROP_GETSS(RootWindow(ob_display, ob_screen),
1186                    net_desktop_names, utf8, &screen_desktop_names))
1187         for (i = 0; screen_desktop_names[i] && i < screen_num_desktops; ++i);
1188     else
1189         i = 0;
1190     if (i < screen_num_desktops) {
1191         GSList *it;
1192
1193         screen_desktop_names = g_renew(gchar*, screen_desktop_names,
1194                                        screen_num_desktops + 1);
1195         screen_desktop_names[screen_num_desktops] = NULL;
1196
1197         it = g_slist_nth(config_desktops_names, i);
1198
1199         for (; i < screen_num_desktops; ++i) {
1200             if (it && ((char*)it->data)[0]) /* not empty */
1201                 /* use the names from the config file when possible */
1202                 screen_desktop_names[i] = g_strdup(it->data);
1203             else
1204                 /* make up a nice name if it's not though */
1205                 screen_desktop_names[i] = g_strdup_printf(_("desktop %i"),
1206                                                           i + 1);
1207             if (it) it = g_slist_next(it);
1208         }
1209
1210         /* if we changed any names, then set the root property so we can
1211            all agree on the names */
1212         PROP_SETSS(RootWindow(ob_display, ob_screen), net_desktop_names,
1213                    screen_desktop_names);
1214     }
1215
1216     /* resize the pager for these names */
1217     for (i = 0; i < screen_num_monitors; i++) {
1218         pager_popup_text_width_to_strings(desktop_popup[i],
1219                                           screen_desktop_names,
1220                                           screen_num_desktops);
1221     }
1222 }
1223
1224 void screen_show_desktop(gboolean show, ObClient *show_only)
1225 {
1226     GList *it;
1227
1228     if (show == screen_showing_desktop) return; /* no change */
1229
1230     screen_showing_desktop = show;
1231
1232     if (show) {
1233         /* hide windows bottom to top */
1234         for (it = g_list_last(stacking_list); it; it = g_list_previous(it)) {
1235             if (WINDOW_IS_CLIENT(it->data)) {
1236                 ObClient *client = it->data;
1237                 client_showhide(client);
1238             }
1239         }
1240     }
1241     else {
1242         /* restore windows top to bottom */
1243         for (it = stacking_list; it; it = g_list_next(it)) {
1244             if (WINDOW_IS_CLIENT(it->data)) {
1245                 ObClient *client = it->data;
1246                 if (client_should_show(client)) {
1247                     if (!show_only || client == show_only)
1248                         client_show(client);
1249                     else
1250                         client_iconify(client, TRUE, FALSE, TRUE);
1251                 }
1252             }
1253         }
1254     }
1255
1256     if (show) {
1257         /* focus the desktop */
1258         for (it = focus_order; it; it = g_list_next(it)) {
1259             ObClient *c = it->data;
1260             if (c->type == OB_CLIENT_TYPE_DESKTOP &&
1261                 (c->desktop == screen_desktop || c->desktop == DESKTOP_ALL) &&
1262                 client_focus(it->data))
1263                 break;
1264         }
1265     }
1266     else if (!show_only) {
1267         ObClient *c;
1268
1269         if ((c = focus_fallback(TRUE, FALSE, TRUE, FALSE))) {
1270             /* only do the flicker reducing stuff ahead of time if we are going
1271                to call xsetinputfocus on the window ourselves. otherwise there
1272                is no guarantee the window will actually take focus.. */
1273             if (c->can_focus) {
1274                 /* reduce flicker by hiliting now rather than waiting for the
1275                    server FocusIn event */
1276                 frame_adjust_focus(c->frame, TRUE);
1277             }
1278         }
1279     }
1280
1281     show = !!show; /* make it boolean */
1282     PROP_SET32(RootWindow(ob_display, ob_screen),
1283                net_showing_desktop, cardinal, show);
1284 }
1285
1286 void screen_install_colormap(ObClient *client, gboolean install)
1287 {
1288     if (client == NULL || client->colormap == None) {
1289         if (install)
1290             XInstallColormap(RrDisplay(ob_rr_inst), RrColormap(ob_rr_inst));
1291         else
1292             XUninstallColormap(RrDisplay(ob_rr_inst), RrColormap(ob_rr_inst));
1293     } else {
1294         xerror_set_ignore(TRUE);
1295         if (install)
1296             XInstallColormap(RrDisplay(ob_rr_inst), client->colormap);
1297         else
1298             XUninstallColormap(RrDisplay(ob_rr_inst), client->colormap);
1299         xerror_set_ignore(FALSE);
1300     }
1301 }
1302
1303 #define STRUT_LEFT_ON_MONITOR(s, i) \
1304     (RANGES_INTERSECT(s->left_start, s->left_end - s->left_start + 1, \
1305                       monitor_area[i].y, monitor_area[i].height))
1306 #define STRUT_RIGHT_ON_MONITOR(s, i) \
1307     (RANGES_INTERSECT(s->right_start, s->right_end - s->right_start + 1, \
1308                       monitor_area[i].y, monitor_area[i].height))
1309 #define STRUT_TOP_ON_MONITOR(s, i) \
1310     (RANGES_INTERSECT(s->top_start, s->top_end - s->top_start + 1, \
1311                       monitor_area[i].x, monitor_area[i].width))
1312 #define STRUT_BOTTOM_ON_MONITOR(s, i) \
1313     (RANGES_INTERSECT(s->bottom_start, s->bottom_end - s->bottom_start + 1, \
1314                       monitor_area[i].x, monitor_area[i].width))
1315
1316 typedef struct {
1317     guint desktop;
1318     StrutPartial *strut;
1319 } ObScreenStrut;
1320
1321 #define RESET_STRUT_LIST(sl) \
1322     (g_slist_free(sl), sl = NULL)
1323
1324 #define ADD_STRUT_TO_LIST(sl, d, s) \
1325 { \
1326     ObScreenStrut *ss = g_new(ObScreenStrut, 1); \
1327     ss->desktop = d; \
1328     ss->strut = s;  \
1329     sl = g_slist_prepend(sl, ss); \
1330 }
1331
1332 #define VALIDATE_STRUTS(sl, side, max) \
1333 { \
1334     GSList *it; \
1335     for (it = sl; it; it = g_slist_next(it)) { \
1336       ObScreenStrut *ss = it->data; \
1337       ss->strut->side = MIN(max, ss->strut->side); \
1338     } \
1339 }
1340
1341 void screen_update_areas(void)
1342 {
1343     guint i, j, onum;
1344     gulong *dims;
1345     GList *it;
1346     GSList *sit;
1347
1348     onum = screen_num_monitors;
1349
1350     g_free(monitor_area);
1351     extensions_xinerama_screens(&monitor_area, &screen_num_monitors);
1352
1353     if (screen_num_monitors < onum) {
1354         /* free some of the pager popups */
1355         for (i = screen_num_monitors; i < onum; ++i)
1356             pager_popup_free(desktop_popup[i]);
1357         desktop_popup = g_renew(ObPagerPopup*, desktop_popup,
1358                                 screen_num_monitors);
1359     }
1360     else {
1361         /* add some more pager popups */
1362         desktop_popup = g_renew(ObPagerPopup*, desktop_popup,
1363                                 screen_num_monitors);
1364         for (i = onum; i < screen_num_monitors; ++i) {
1365             desktop_popup[i] = pager_popup_new();
1366             pager_popup_height(desktop_popup[i], POPUP_HEIGHT);
1367             if (screen_desktop_names) /* the areas are initialized before the
1368                                          desktop names */
1369                 pager_popup_text_width_to_strings(desktop_popup[i],
1370                                                   screen_desktop_names,
1371                                                   screen_num_desktops);
1372         }
1373     }
1374
1375     /* set up the user-specified margins */
1376     config_margins.top_start = RECT_LEFT(monitor_area[screen_num_monitors]);
1377     config_margins.top_end = RECT_RIGHT(monitor_area[screen_num_monitors]);
1378     config_margins.bottom_start = RECT_LEFT(monitor_area[screen_num_monitors]);
1379     config_margins.bottom_end = RECT_RIGHT(monitor_area[screen_num_monitors]);
1380     config_margins.left_start = RECT_TOP(monitor_area[screen_num_monitors]);
1381     config_margins.left_end = RECT_BOTTOM(monitor_area[screen_num_monitors]);
1382     config_margins.right_start = RECT_TOP(monitor_area[screen_num_monitors]);
1383     config_margins.right_end = RECT_BOTTOM(monitor_area[screen_num_monitors]);
1384
1385     dims = g_new(gulong, 4 * screen_num_desktops * screen_num_monitors);
1386
1387     RESET_STRUT_LIST(struts_left);
1388     RESET_STRUT_LIST(struts_top);
1389     RESET_STRUT_LIST(struts_right);
1390     RESET_STRUT_LIST(struts_bottom);
1391
1392     /* collect the struts */
1393     for (it = client_list; it; it = g_list_next(it)) {
1394         ObClient *c = it->data;
1395         if (c->strut.left)
1396             ADD_STRUT_TO_LIST(struts_left, c->desktop, &c->strut);
1397         if (c->strut.top)
1398             ADD_STRUT_TO_LIST(struts_top, c->desktop, &c->strut);
1399         if (c->strut.right)
1400             ADD_STRUT_TO_LIST(struts_right, c->desktop, &c->strut);
1401         if (c->strut.bottom)
1402             ADD_STRUT_TO_LIST(struts_bottom, c->desktop, &c->strut);
1403     }
1404     if (dock_strut.left)
1405         ADD_STRUT_TO_LIST(struts_left, DESKTOP_ALL, &dock_strut);
1406     if (dock_strut.top)
1407         ADD_STRUT_TO_LIST(struts_top, DESKTOP_ALL, &dock_strut);
1408     if (dock_strut.right)
1409         ADD_STRUT_TO_LIST(struts_right, DESKTOP_ALL, &dock_strut);
1410     if (dock_strut.bottom)
1411         ADD_STRUT_TO_LIST(struts_bottom, DESKTOP_ALL, &dock_strut);
1412
1413     if (config_margins.left)
1414         ADD_STRUT_TO_LIST(struts_left, DESKTOP_ALL, &config_margins);
1415     if (config_margins.top)
1416         ADD_STRUT_TO_LIST(struts_top, DESKTOP_ALL, &config_margins);
1417     if (config_margins.right)
1418         ADD_STRUT_TO_LIST(struts_right, DESKTOP_ALL, &config_margins);
1419     if (config_margins.bottom)
1420         ADD_STRUT_TO_LIST(struts_bottom, DESKTOP_ALL, &config_margins);
1421
1422     VALIDATE_STRUTS(struts_left, left,
1423                     monitor_area[screen_num_monitors].width / 2);
1424     VALIDATE_STRUTS(struts_right, right,
1425                     monitor_area[screen_num_monitors].width / 2);
1426     VALIDATE_STRUTS(struts_top, top,
1427                     monitor_area[screen_num_monitors].height / 2);
1428     VALIDATE_STRUTS(struts_bottom, bottom,
1429                     monitor_area[screen_num_monitors].height / 2);
1430
1431     /* set up the work areas to be full screen */
1432     for (i = 0; i < screen_num_monitors; ++i)
1433         for (j = 0; j < screen_num_desktops; ++j) {
1434             dims[(i * screen_num_desktops + j) * 4+0] = monitor_area[i].x;
1435             dims[(i * screen_num_desktops + j) * 4+1] = monitor_area[i].y;
1436             dims[(i * screen_num_desktops + j) * 4+2] = monitor_area[i].width;
1437             dims[(i * screen_num_desktops + j) * 4+3] = monitor_area[i].height;
1438         }
1439
1440     /* calculate the work areas from the struts */
1441     for (i = 0; i < screen_num_monitors; ++i)
1442         for (j = 0; j < screen_num_desktops; ++j) {
1443             gint l = 0, r = 0, t = 0, b = 0;
1444
1445             /* only add the strut to the area if it touches the monitor */
1446
1447             for (sit = struts_left; sit; sit = g_slist_next(sit)) {
1448                 ObScreenStrut *s = sit->data;
1449                 if ((s->desktop == j || s->desktop == DESKTOP_ALL) &&
1450                     STRUT_LEFT_ON_MONITOR(s->strut, i))
1451                     l = MAX(l, s->strut->left);
1452             }
1453             for (sit = struts_top; sit; sit = g_slist_next(sit)) {
1454                 ObScreenStrut *s = sit->data;
1455                 if ((s->desktop == j || s->desktop == DESKTOP_ALL) &&
1456                     STRUT_TOP_ON_MONITOR(s->strut, i))
1457                     t = MAX(t, s->strut->top);
1458             }
1459             for (sit = struts_right; sit; sit = g_slist_next(sit)) {
1460                 ObScreenStrut *s = sit->data;
1461                 if ((s->desktop == j || s->desktop == DESKTOP_ALL) &&
1462                     STRUT_RIGHT_ON_MONITOR(s->strut, i))
1463                     r = MAX(r, s->strut->right);
1464             }
1465             for (sit = struts_bottom; sit; sit = g_slist_next(sit)) {
1466                 ObScreenStrut *s = sit->data;
1467                 if ((s->desktop == j || s->desktop == DESKTOP_ALL) &&
1468                     STRUT_BOTTOM_ON_MONITOR(s->strut, i))
1469                     b = MAX(b, s->strut->bottom);
1470             }
1471
1472             /* if the monitor is not against the edge of the root window,
1473                the struts will include the distance from the root window's edge
1474                to the monitor, so add that back into the monitor's work area */
1475             if (l) l += RECT_LEFT  (monitor_area[screen_num_monitors])
1476                         - RECT_LEFT  (monitor_area[i]);
1477             if (t) t += RECT_TOP   (monitor_area[screen_num_monitors])
1478                         - RECT_TOP   (monitor_area[i]);
1479             if (r) r -= RECT_RIGHT (monitor_area[screen_num_monitors])
1480                         - RECT_RIGHT (monitor_area[i]);
1481             if (b) b -= RECT_BOTTOM(monitor_area[screen_num_monitors])
1482                         - RECT_BOTTOM(monitor_area[i]);
1483
1484             /* based on these margins, set the work area for the
1485                monitor/desktop */
1486             dims[(i * screen_num_desktops + j) * 4 + 0] += l;
1487             dims[(i * screen_num_desktops + j) * 4 + 1] += t;
1488             dims[(i * screen_num_desktops + j) * 4 + 2] -= l + r;
1489             dims[(i * screen_num_desktops + j) * 4 + 3] -= t + b;
1490         }
1491
1492     /* all the work areas are not used here, only the ones for the first
1493        monitor are */
1494     PROP_SETA32(RootWindow(ob_display, ob_screen), net_workarea, cardinal,
1495                 dims, 4 * screen_num_desktops);
1496
1497     /* the area has changed, adjust all the windows if they need it */
1498     for (it = client_list; it; it = g_list_next(it))
1499         client_reconfigure(it->data, FALSE);
1500
1501     g_free(dims);
1502 }
1503
1504 #if 0
1505 Rect* screen_area_all_monitors(guint desktop)
1506 {
1507     guint i;
1508     Rect *a;
1509
1510     a = screen_area_monitor(desktop, 0);
1511
1512     /* combine all the monitors together */
1513     for (i = 1; i < screen_num_monitors; ++i) {
1514         Rect *m = screen_area_monitor(desktop, i);
1515         gint l, r, t, b;
1516
1517         l = MIN(RECT_LEFT(*a), RECT_LEFT(*m));
1518         t = MIN(RECT_TOP(*a), RECT_TOP(*m));
1519         r = MAX(RECT_RIGHT(*a), RECT_RIGHT(*m));
1520         b = MAX(RECT_BOTTOM(*a), RECT_BOTTOM(*m));
1521
1522         RECT_SET(*a, l, t, r - l + 1, b - t + 1);
1523
1524         g_free(m);
1525     }
1526
1527     return a;
1528 }
1529 #endif
1530
1531 #define STRUT_LEFT_IN_SEARCH(s, search) \
1532     (RANGES_INTERSECT(search->y, search->height, \
1533                       s->left_start, s->left_end - s->left_start + 1))
1534 #define STRUT_RIGHT_IN_SEARCH(s, search) \
1535     (RANGES_INTERSECT(search->y, search->height, \
1536                       s->right_start, s->right_end - s->right_start + 1))
1537 #define STRUT_TOP_IN_SEARCH(s, search) \
1538     (RANGES_INTERSECT(search->x, search->width, \
1539                       s->top_start, s->top_end - s->top_start + 1))
1540 #define STRUT_BOTTOM_IN_SEARCH(s, search) \
1541     (RANGES_INTERSECT(search->x, search->width, \
1542                       s->bottom_start, s->bottom_end - s->bottom_start + 1))
1543
1544 #define STRUT_LEFT_IGNORE(s, us, search) \
1545     (head == SCREEN_AREA_ALL_MONITORS && us && \
1546      RECT_LEFT(monitor_area[i]) + s->left > RECT_LEFT(*search))
1547 #define STRUT_RIGHT_IGNORE(s, us, search) \
1548     (head == SCREEN_AREA_ALL_MONITORS && us && \
1549      RECT_RIGHT(monitor_area[i]) - s->right < RECT_RIGHT(*search))
1550 #define STRUT_TOP_IGNORE(s, us, search) \
1551     (head == SCREEN_AREA_ALL_MONITORS && us && \
1552      RECT_TOP(monitor_area[i]) + s->top > RECT_TOP(*search))
1553 #define STRUT_BOTTOM_IGNORE(s, us, search) \
1554     (head == SCREEN_AREA_ALL_MONITORS && us && \
1555      RECT_BOTTOM(monitor_area[i]) - s->bottom < RECT_BOTTOM(*search))
1556
1557 Rect* screen_area(guint desktop, guint head, Rect *search)
1558 {
1559     Rect *a;
1560     GSList *it;
1561     gint l, r, t, b, al, ar, at, ab;
1562     guint i, d;
1563     gboolean us = search != NULL; /* user provided search */
1564
1565     g_assert(desktop < screen_num_desktops || desktop == DESKTOP_ALL);
1566     g_assert(head < screen_num_monitors || head == SCREEN_AREA_ONE_MONITOR ||
1567              head == SCREEN_AREA_ALL_MONITORS);
1568     g_assert(!(head == SCREEN_AREA_ONE_MONITOR && search == NULL));
1569
1570     /* find any struts for this monitor
1571        which will be affecting the search area.
1572     */
1573
1574     /* search everything if search is null */
1575     if (!search) {
1576         if (head < screen_num_monitors) search = &monitor_area[head];
1577         else search = &monitor_area[screen_num_monitors];
1578     }
1579     if (head == SCREEN_AREA_ONE_MONITOR) head = screen_find_monitor(search);
1580
1581     /* al is "all left" meaning the furthest left you can get, l is our
1582        "working left" meaning our current strut edge which we're calculating
1583     */
1584
1585     /* only include monitors which the search area lines up with */
1586     if (RECT_INTERSECTS_RECT(monitor_area[screen_num_monitors], *search)) {
1587         al = l = RECT_RIGHT(monitor_area[screen_num_monitors]);
1588         at = t = RECT_BOTTOM(monitor_area[screen_num_monitors]);
1589         ar = r = RECT_LEFT(monitor_area[screen_num_monitors]);
1590         ab = b = RECT_TOP(monitor_area[screen_num_monitors]);
1591         for (i = 0; i < screen_num_monitors; ++i) {
1592             /* add the monitor if applicable */
1593             if (RANGES_INTERSECT(search->x, search->width,
1594                                  monitor_area[i].x, monitor_area[i].width))
1595             {
1596                 at = t = MIN(t, RECT_TOP(monitor_area[i]));
1597                 ab = b = MAX(b, RECT_BOTTOM(monitor_area[i]));
1598             }
1599             if (RANGES_INTERSECT(search->y, search->height,
1600                                  monitor_area[i].y, monitor_area[i].height))
1601             {
1602                 al = l = MIN(l, RECT_LEFT(monitor_area[i]));
1603                 ar = r = MAX(r, RECT_RIGHT(monitor_area[i]));
1604             }
1605         }
1606     } else {
1607         al = l = RECT_LEFT(monitor_area[screen_num_monitors]);
1608         at = t = RECT_TOP(monitor_area[screen_num_monitors]);
1609         ar = r = RECT_RIGHT(monitor_area[screen_num_monitors]);
1610         ab = b = RECT_BOTTOM(monitor_area[screen_num_monitors]);
1611     }
1612
1613     for (d = 0; d < screen_num_desktops; ++d) {
1614         if (d != desktop && desktop != DESKTOP_ALL) continue;
1615
1616         for (i = 0; i < screen_num_monitors; ++i) {
1617             if (head != SCREEN_AREA_ALL_MONITORS && head != i) continue;
1618
1619             for (it = struts_left; it; it = g_slist_next(it)) {
1620                 ObScreenStrut *s = it->data;
1621                 if ((s->desktop == d || s->desktop == DESKTOP_ALL) &&
1622                     STRUT_LEFT_IN_SEARCH(s->strut, search) &&
1623                     !STRUT_LEFT_IGNORE(s->strut, us, search))
1624                     l = MAX(l, RECT_LEFT(monitor_area[screen_num_monitors])
1625                                + s->strut->left);
1626             }
1627             for (it = struts_top; it; it = g_slist_next(it)) {
1628                 ObScreenStrut *s = it->data;
1629                 if ((s->desktop == d || s->desktop == DESKTOP_ALL) &&
1630                     STRUT_TOP_IN_SEARCH(s->strut, search) &&
1631                     !STRUT_TOP_IGNORE(s->strut, us, search))
1632                     t = MAX(t, RECT_TOP(monitor_area[screen_num_monitors])
1633                                + s->strut->top);
1634             }
1635             for (it = struts_right; it; it = g_slist_next(it)) {
1636                 ObScreenStrut *s = it->data;
1637                 if ((s->desktop == d || s->desktop == DESKTOP_ALL) &&
1638                     STRUT_RIGHT_IN_SEARCH(s->strut, search) &&
1639                     !STRUT_RIGHT_IGNORE(s->strut, us, search))
1640                     r = MIN(r, RECT_RIGHT(monitor_area[screen_num_monitors])
1641                                - s->strut->right);
1642             }
1643             for (it = struts_bottom; it; it = g_slist_next(it)) {
1644                 ObScreenStrut *s = it->data;
1645                 if ((s->desktop == d || s->desktop == DESKTOP_ALL) &&
1646                     STRUT_BOTTOM_IN_SEARCH(s->strut, search) &&
1647                     !STRUT_BOTTOM_IGNORE(s->strut, us, search))
1648                     b = MIN(b, RECT_BOTTOM(monitor_area[screen_num_monitors])
1649                                - s->strut->bottom);
1650             }
1651
1652             /* limit to this monitor */
1653             if (head == i) {
1654                 l = MAX(l, RECT_LEFT(monitor_area[i]));
1655                 t = MAX(t, RECT_TOP(monitor_area[i]));
1656                 r = MIN(r, RECT_RIGHT(monitor_area[i]));
1657                 b = MIN(b, RECT_BOTTOM(monitor_area[i]));
1658             }
1659         }
1660     }
1661
1662     a = g_new(Rect, 1);
1663     a->x = l;
1664     a->y = t;
1665     a->width = r - l + 1;
1666     a->height = b - t + 1;
1667     return a;
1668 }
1669
1670 guint screen_find_monitor(Rect *search)
1671 {
1672     guint i;
1673     guint most = screen_num_monitors;
1674     guint mostv = 0;
1675
1676     for (i = 0; i < screen_num_monitors; ++i) {
1677         Rect *area = screen_physical_area_monitor(i);
1678         if (RECT_INTERSECTS_RECT(*area, *search)) {
1679             Rect r;
1680             guint v;
1681
1682             RECT_SET_INTERSECTION(r, *area, *search);
1683             v = r.width * r.height;
1684
1685             if (v > mostv) {
1686                 mostv = v;
1687                 most = i;
1688             }
1689         }
1690         g_free(area);
1691     }
1692     return most;
1693 }
1694
1695 Rect* screen_physical_area_all_monitors(void)
1696 {
1697     return screen_physical_area_monitor(screen_num_monitors);
1698 }
1699
1700 Rect* screen_physical_area_monitor(guint head)
1701 {
1702     Rect *a;
1703     g_assert(head <= screen_num_monitors);
1704
1705     a = g_new(Rect, 1);
1706     *a = monitor_area[head];
1707     return a;
1708 }
1709
1710 gboolean screen_physical_area_monitor_contains(guint head, Rect *search)
1711 {
1712     g_assert(head <= screen_num_monitors);
1713     g_assert(search);
1714     return RECT_INTERSECTS_RECT(monitor_area[head], *search);
1715 }
1716
1717 Rect* screen_physical_area_active(void)
1718 {
1719     Rect *a;
1720     gint x, y;
1721
1722     if (moveresize_client)
1723         a = screen_physical_area_monitor(client_monitor(focus_client));
1724     else if (focus_client)
1725         a = screen_physical_area_monitor(client_monitor(focus_client));
1726     else {
1727         Rect mon;
1728         if (screen_pointer_pos(&x, &y))
1729             RECT_SET(mon, x, y, 1, 1);
1730         else
1731             RECT_SET(mon, 0, 0, 1, 1);
1732         a = screen_physical_area_monitor(screen_find_monitor(&mon));
1733     }
1734     return a;
1735 }
1736
1737 void screen_set_root_cursor(void)
1738 {
1739     if (sn_app_starting())
1740         XDefineCursor(ob_display, RootWindow(ob_display, ob_screen),
1741                       ob_cursor(OB_CURSOR_BUSYPOINTER));
1742     else
1743         XDefineCursor(ob_display, RootWindow(ob_display, ob_screen),
1744                       ob_cursor(OB_CURSOR_POINTER));
1745 }
1746
1747 gboolean screen_pointer_pos(gint *x, gint *y)
1748 {
1749     Window w;
1750     gint i;
1751     guint u;
1752     gboolean ret;
1753
1754     ret = !!XQueryPointer(ob_display, RootWindow(ob_display, ob_screen),
1755                           &w, &w, x, y, &i, &i, &u);
1756     if (!ret) {
1757         for (i = 0; i < ScreenCount(ob_display); ++i)
1758             if (i != ob_screen)
1759                 if (XQueryPointer(ob_display, RootWindow(ob_display, i),
1760                                   &w, &w, x, y, &i, &i, &u))
1761                     break;
1762     }
1763     return ret;
1764 }