dont need to sync
[dana/openbox.git] / openbox / screen.c
1 #include "openbox.h"
2 #include "prop.h"
3 #include "config.h"
4 #include "screen.h"
5 #include "client.h"
6 #include "frame.h"
7 #include "focus.h"
8 #include "dispatch.h"
9 #include "../render/render.h"
10
11 #include <X11/Xlib.h>
12 #ifdef HAVE_UNISTD_H
13 #  include <sys/types.h>
14 #  include <unistd.h>
15 #endif
16
17 /*! The event mask to grab on the root window */
18 #define ROOT_EVENTMASK (/*ColormapChangeMask |*/ PropertyChangeMask | \
19                         EnterWindowMask | LeaveWindowMask | \
20                         SubstructureNotifyMask | SubstructureRedirectMask | \
21                         ButtonPressMask | ButtonReleaseMask | ButtonMotionMask)
22
23 guint    screen_num_desktops    = 0;
24 guint    screen_desktop         = 0;
25 Size     screen_physical_size;
26 gboolean screen_showing_desktop;
27 DesktopLayout screen_desktop_layout;
28 char   **screen_desktop_names = NULL;
29
30 static Rect  *area = NULL;
31 static Strut *strut = NULL;
32 static Window support_window = None;
33
34 static void screen_update_area();
35
36 static gboolean running;
37 static int another_running(Display *d, XErrorEvent *e)
38 {
39     (void)d;(void)e;
40     g_message("A window manager is already running on screen %d",
41               ob_screen);
42     running = TRUE;
43     return -1;
44 }
45
46 gboolean screen_annex()
47 {
48     XErrorHandler old;
49     pid_t pid;
50     int i, num_support;
51     guint32 *supported;
52
53     running = FALSE;
54     old = XSetErrorHandler(another_running);
55     XSelectInput(ob_display, ob_root, ROOT_EVENTMASK);
56     XSync(ob_display, FALSE);
57     XSetErrorHandler(old);
58     if (running)
59         return FALSE;
60
61     g_message("Managing screen %d", ob_screen);
62
63     /* set the mouse cursor for the root window (the default cursor) */
64     XDefineCursor(ob_display, ob_root, ob_cursors.ptr);
65
66     /* set the OPENBOX_PID hint */
67     pid = getpid();
68     PROP_SET32(ob_root, openbox_pid, cardinal, pid);
69
70     /* create the netwm support window */
71     support_window = XCreateSimpleWindow(ob_display, ob_root, 0,0,1,1,0,0,0);
72
73     /* set supporting window */
74     PROP_SET32(ob_root, net_supporting_wm_check, window, support_window);
75
76     /* set properties on the supporting window */
77     PROP_SETS(support_window, net_wm_name, "Openbox");
78     PROP_SET32(support_window, net_supporting_wm_check, window,support_window);
79
80     /* set the _NET_SUPPORTED_ATOMS hint */
81     num_support = 61;
82     i = 0;
83     supported = g_new(guint32, num_support);
84     supported[i++] = prop_atoms.net_current_desktop;
85     supported[i++] = prop_atoms.net_number_of_desktops;
86     supported[i++] = prop_atoms.net_desktop_geometry;
87     supported[i++] = prop_atoms.net_desktop_viewport;
88     supported[i++] = prop_atoms.net_active_window;
89     supported[i++] = prop_atoms.net_workarea;
90     supported[i++] = prop_atoms.net_client_list;
91     supported[i++] = prop_atoms.net_client_list_stacking;
92     supported[i++] = prop_atoms.net_desktop_names;
93     supported[i++] = prop_atoms.net_close_window;
94     supported[i++] = prop_atoms.net_desktop_layout;
95     supported[i++] = prop_atoms.net_showing_desktop;
96     supported[i++] = prop_atoms.net_wm_name;
97     supported[i++] = prop_atoms.net_wm_visible_name;
98     supported[i++] = prop_atoms.net_wm_icon_name;
99     supported[i++] = prop_atoms.net_wm_visible_icon_name;
100     supported[i++] = prop_atoms.net_wm_desktop;
101     supported[i++] = prop_atoms.net_wm_strut;
102     supported[i++] = prop_atoms.net_wm_window_type;
103     supported[i++] = prop_atoms.net_wm_window_type_desktop;
104     supported[i++] = prop_atoms.net_wm_window_type_dock;
105     supported[i++] = prop_atoms.net_wm_window_type_toolbar;
106     supported[i++] = prop_atoms.net_wm_window_type_menu;
107     supported[i++] = prop_atoms.net_wm_window_type_utility;
108     supported[i++] = prop_atoms.net_wm_window_type_splash;
109     supported[i++] = prop_atoms.net_wm_window_type_dialog;
110     supported[i++] = prop_atoms.net_wm_window_type_normal;
111     supported[i++] = prop_atoms.net_wm_allowed_actions;
112     supported[i++] = prop_atoms.net_wm_action_move;
113     supported[i++] = prop_atoms.net_wm_action_resize;
114     supported[i++] = prop_atoms.net_wm_action_minimize;
115     supported[i++] = prop_atoms.net_wm_action_shade;
116     supported[i++] = prop_atoms.net_wm_action_maximize_horz;
117     supported[i++] = prop_atoms.net_wm_action_maximize_vert;
118     supported[i++] = prop_atoms.net_wm_action_fullscreen;
119     supported[i++] = prop_atoms.net_wm_action_change_desktop;
120     supported[i++] = prop_atoms.net_wm_action_close;
121     supported[i++] = prop_atoms.net_wm_state;
122     supported[i++] = prop_atoms.net_wm_state_modal;
123     supported[i++] = prop_atoms.net_wm_state_maximized_vert;
124     supported[i++] = prop_atoms.net_wm_state_maximized_horz;
125     supported[i++] = prop_atoms.net_wm_state_shaded;
126     supported[i++] = prop_atoms.net_wm_state_skip_taskbar;
127     supported[i++] = prop_atoms.net_wm_state_skip_pager;
128     supported[i++] = prop_atoms.net_wm_state_hidden;
129     supported[i++] = prop_atoms.net_wm_state_fullscreen;
130     supported[i++] = prop_atoms.net_wm_state_above;
131     supported[i++] = prop_atoms.net_wm_state_below;
132     supported[i++] = prop_atoms.net_moveresize_window;
133     supported[i++] = prop_atoms.net_wm_moveresize;
134     supported[i++] = prop_atoms.net_wm_moveresize_size_topleft;
135     supported[i++] = prop_atoms.net_wm_moveresize_size_top;
136     supported[i++] = prop_atoms.net_wm_moveresize_size_topright;
137     supported[i++] = prop_atoms.net_wm_moveresize_size_right;
138     supported[i++] = prop_atoms.net_wm_moveresize_size_bottomright;
139     supported[i++] = prop_atoms.net_wm_moveresize_size_bottom;
140     supported[i++] = prop_atoms.net_wm_moveresize_size_bottomleft;
141     supported[i++] = prop_atoms.net_wm_moveresize_size_left;
142     supported[i++] = prop_atoms.net_wm_moveresize_move;
143     supported[i++] = prop_atoms.net_wm_moveresize_size_keyboard;
144     supported[i++] = prop_atoms.net_wm_moveresize_move_keyboard;
145     g_assert(i == num_support);
146 /*
147   supported[] = prop_atoms.net_wm_action_stick;
148 */
149
150     PROP_SETA32(ob_root, net_supported, atom, supported, num_support);
151     g_free(supported);
152
153     return TRUE;
154 }
155
156 void screen_startup()
157 {
158     GSList *it;
159     guint i;
160
161     /* get the initial size */
162     screen_resize();
163
164     /* set the names */
165     screen_desktop_names = g_new(char*,
166                                  g_slist_length(config_desktops_names) + 1);
167     for (i = 0, it = config_desktops_names; it; ++i, it = it->next)
168         screen_desktop_names[i] = it->data; /* dont strdup */
169     screen_desktop_names[i] = NULL;
170     PROP_SETSS(ob_root, net_desktop_names, screen_desktop_names);
171     g_free(screen_desktop_names); /* dont free the individual strings */
172     screen_desktop_names = NULL;
173
174     screen_num_desktops = 0;
175     screen_set_num_desktops(config_desktops_num);
176     screen_desktop = 0;
177     screen_set_desktop(0);
178
179     /* don't start in showing-desktop mode */
180     screen_showing_desktop = FALSE;
181     PROP_SET32(ob_root, net_showing_desktop, cardinal, screen_showing_desktop);
182
183     screen_update_layout();
184 }
185
186 void screen_shutdown()
187 {
188     XSelectInput(ob_display, ob_root, NoEventMask);
189
190     PROP_ERASE(ob_root, openbox_pid); /* we're not running here no more! */
191     PROP_ERASE(ob_root, net_supported); /* not without us */
192     PROP_ERASE(ob_root, net_showing_desktop); /* don't keep this mode */
193
194     XDestroyWindow(ob_display, support_window);
195
196     g_strfreev(screen_desktop_names);
197     g_free(strut);
198     g_free(area);
199 }
200
201 void screen_resize()
202 {
203     /* XXX RandR support here? */
204     guint32 geometry[2];
205
206     /* Set the _NET_DESKTOP_GEOMETRY hint */
207     geometry[0] = WidthOfScreen(ScreenOfDisplay(ob_display, ob_screen));
208     geometry[1] = HeightOfScreen(ScreenOfDisplay(ob_display, ob_screen));
209     PROP_SETA32(ob_root, net_desktop_geometry, cardinal, geometry, 2);
210     screen_physical_size.width = geometry[0];
211     screen_physical_size.height = geometry[1];
212
213     if (ob_state == State_Starting)
214         return;
215
216     screen_update_struts();
217
218     /* XXX adjust more stuff ? */
219 }
220
221 void screen_set_num_desktops(guint num)
222 {
223     guint i, old;
224     guint32 *viewport;
225     GList *it;
226
227     g_assert(num > 0);
228
229     old = screen_num_desktops;
230     screen_num_desktops = num;
231     PROP_SET32(ob_root, net_number_of_desktops, cardinal, num);
232
233     /* set the viewport hint */
234     viewport = g_new0(guint32, num * 2);
235     PROP_SETA32(ob_root, net_desktop_viewport, cardinal, viewport, num * 2);
236     g_free(viewport);
237
238     /* change our struts/area to match */
239     screen_update_struts();
240
241     /* the number of rows/columns will differ */
242     screen_update_layout();
243
244     /* may be some unnamed desktops that we need to fill in with names */
245     screen_update_desktop_names();
246
247     /* update the focus lists */
248     /* free our lists for the desktops which have disappeared */
249     for (i = num; i < old; ++i)
250         g_list_free(focus_order[i]);
251     /* realloc the array */
252     focus_order = g_renew(GList*, focus_order, num);
253     /* set the new lists to be empty */
254     for (i = old; i < num; ++i)
255         focus_order[i] = NULL;
256
257     /* move windows on desktops that will no longer exist! */
258     for (it = client_list; it != NULL; it = it->next) {
259         Client *c = it->data;
260         if (c->desktop >= num)
261             client_set_desktop(c, num - 1, FALSE);
262     }
263
264     dispatch_ob(Event_Ob_NumDesktops, num, old);
265
266     /* change our desktop if we're on one that no longer exists! */
267     if (screen_desktop >= screen_num_desktops)
268         screen_set_desktop(num - 1);
269 }
270
271 void screen_set_desktop(guint num)
272 {
273     GList *it;
274     guint old;
275     XEvent e;
276      
277     g_assert(num < screen_num_desktops);
278
279     old = screen_desktop;
280     screen_desktop = num;
281     PROP_SET32(ob_root, net_current_desktop, cardinal, num);
282
283     if (old == num) return;
284
285     g_message("Moving to desktop %d", num+1);
286
287     /* show windows before hiding the rest to lessen the enter/leave events */
288
289     /* show windows from top to bottom */
290     for (it = stacking_list; it != NULL; it = it->next) {
291         Client *c = it->data;
292         if (!c->frame->visible && client_should_show(c))
293             frame_show(c->frame);
294     }
295
296     /* hide windows from bottom to top */
297     for (it = g_list_last(stacking_list); it != NULL; it = it->prev) {
298         Client *c = it->data;
299         if (c->frame->visible && !client_should_show(c))
300             frame_hide(c->frame);
301     }
302
303     /* focus the last focused window on the desktop, and ignore enter events
304        from the switch so it doesnt mess with the focus */
305     while (XCheckTypedEvent(ob_display, EnterNotify, &e));
306     focus_fallback(Fallback_Desktop);
307
308     dispatch_ob(Event_Ob_Desktop, num, old);
309 }
310
311 void screen_update_layout()
312 {
313     guint32 *data = NULL;
314     guint num;
315
316     /* defaults */
317     screen_desktop_layout.orientation = prop_atoms.net_wm_orientation_horz;
318     screen_desktop_layout.start_corner = prop_atoms.net_wm_topleft;
319     screen_desktop_layout.rows = 1;
320     screen_desktop_layout.columns = screen_num_desktops;
321
322     if (PROP_GETA32(ob_root, net_desktop_layout, cardinal, &data, &num)) {
323         if (num == 3 || num == 4) {
324             if (data[0] == prop_atoms.net_wm_orientation_vert)
325                 screen_desktop_layout.orientation = data[0];
326             if (num == 3)
327                 screen_desktop_layout.start_corner =
328                     prop_atoms.net_wm_topright;
329             else {
330                 if (data[3] == prop_atoms.net_wm_topright)
331                     screen_desktop_layout.start_corner = data[3];
332                 else if (data[3] == prop_atoms.net_wm_bottomright)
333                     screen_desktop_layout.start_corner = data[3];
334                 else if (data[3] == prop_atoms.net_wm_bottomleft)
335                     screen_desktop_layout.start_corner = data[3];
336             }
337
338             /* fill in a zero rows/columns */
339             if (!(data[1] == 0 && data[2] == 0)) { /* both 0's is bad data.. */
340                 if (data[1] == 0) {
341                     data[1] = (screen_num_desktops +
342                                screen_num_desktops % data[2]) / data[2];
343                 } else if (data[2] == 0) {
344                     data[2] = (screen_num_desktops +
345                                screen_num_desktops % data[1]) / data[1];
346                 }
347                 screen_desktop_layout.columns = data[1];
348                 screen_desktop_layout.rows = data[2];
349             }
350
351             /* bounds checking */
352             if (screen_desktop_layout.orientation ==
353                 prop_atoms.net_wm_orientation_horz) {
354                 if (screen_desktop_layout.rows > screen_num_desktops)
355                     screen_desktop_layout.rows = screen_num_desktops;
356                 if (screen_desktop_layout.columns >
357                     ((screen_num_desktops + screen_num_desktops %
358                       screen_desktop_layout.rows) /
359                      screen_desktop_layout.rows))
360                     screen_desktop_layout.columns =
361                         (screen_num_desktops + screen_num_desktops %
362                          screen_desktop_layout.rows) /
363                         screen_desktop_layout.rows;
364             } else {
365                 if (screen_desktop_layout.columns > screen_num_desktops)
366                     screen_desktop_layout.columns = screen_num_desktops;
367                 if (screen_desktop_layout.rows >
368                     ((screen_num_desktops + screen_num_desktops %
369                       screen_desktop_layout.columns) /
370                      screen_desktop_layout.columns))
371                     screen_desktop_layout.rows =
372                         (screen_num_desktops + screen_num_desktops %
373                          screen_desktop_layout.columns) /
374                         screen_desktop_layout.columns;
375             }
376         }
377         g_free(data);
378     }
379 }
380
381 void screen_update_desktop_names()
382 {
383     guint i;
384
385     /* empty the array */
386     g_strfreev(screen_desktop_names);
387     screen_desktop_names = NULL;
388
389     if (PROP_GETSS(ob_root, net_desktop_names, utf8, &screen_desktop_names))
390         for (i = 0; screen_desktop_names[i] && i <= screen_num_desktops; ++i);
391     else
392         i = 0;
393     if (i <= screen_num_desktops) {
394         screen_desktop_names = g_renew(char*, screen_desktop_names,
395                                        screen_num_desktops + 1);
396         screen_desktop_names[screen_num_desktops] = NULL;
397         for (; i < screen_num_desktops; ++i)
398             screen_desktop_names[i] = g_strdup("Unnamed Desktop");
399     }
400 }
401
402 void screen_show_desktop(gboolean show)
403 {
404     GList *it;
405      
406     if (show == screen_showing_desktop) return; /* no change */
407
408     screen_showing_desktop = show;
409
410     if (show) {
411         /* bottom to top */
412         for (it = g_list_last(stacking_list); it != NULL; it = it->prev) {
413             Client *client = it->data;
414             if (client->frame->visible && !client_should_show(client))
415                 frame_hide(client->frame);
416         }
417     } else {
418         /* top to bottom */
419         for (it = stacking_list; it != NULL; it = it->next) {
420             Client *client = it->data;
421             if (!client->frame->visible && client_should_show(client))
422                 frame_show(client->frame);
423         }
424     }
425
426     if (show) {
427         /* focus desktop */
428         for (it = focus_order[screen_desktop]; it; it = it->next)
429             if (((Client*)it->data)->type == Type_Desktop &&
430                 client_focus(it->data))
431                 break;
432     } else {
433         focus_fallback(Fallback_NoFocus);
434     }
435
436     show = !!show; /* make it boolean */
437     PROP_SET32(ob_root, net_showing_desktop, cardinal, show);
438
439     dispatch_ob(Event_Ob_ShowDesktop, show, 0);
440 }
441
442 void screen_install_colormap(Client *client, gboolean install)
443 {
444     XWindowAttributes wa;
445
446     if (client == NULL) {
447         if (install)
448             XInstallColormap(ob_display, render_colormap);
449         else
450             XUninstallColormap(ob_display, render_colormap);
451     } else {
452         if (XGetWindowAttributes(ob_display, client->window, &wa) &&
453             wa.colormap != None) {
454             if (install)
455                 XInstallColormap(ob_display, wa.colormap);
456             else
457                 XUninstallColormap(ob_display, wa.colormap);
458         }
459     }
460 }
461
462 void screen_update_struts()
463 {
464     GList *it;
465     guint i;
466      
467     g_free(strut);
468     strut = g_new0(Strut, screen_num_desktops + 1);
469
470     for (it = client_list; it != NULL; it = it->next) {
471         Client *c = it->data;
472         if (c->iconic) continue; /* these dont count in the strut */
473     
474         if (c->desktop == 0xffffffff) {
475             for (i = 0; i < screen_num_desktops; ++i)
476                 STRUT_ADD(strut[i], c->strut);
477         } else {
478             g_assert(c->desktop < screen_num_desktops);
479             STRUT_ADD(strut[c->desktop], c->strut);
480         }
481         /* apply to the 'all desktops' strut */
482         STRUT_ADD(strut[screen_num_desktops], c->strut);
483     }
484     screen_update_area();
485 }
486
487 static void screen_update_area()
488 {
489     guint i;
490     guint32 *dims;
491
492     g_free(area);
493     area = g_new0(Rect, screen_num_desktops + 1);
494      
495     dims = g_new(guint32, 4 * screen_num_desktops);
496     for (i = 0; i < screen_num_desktops + 1; ++i) {
497         Rect old_area = area[i];
498 /*
499   #ifdef    XINERAMA
500   // reset to the full areas
501   if (isXineramaActive())
502   xineramaUsableArea = getXineramaAreas();
503   #endif // XINERAMA
504 */
505
506         RECT_SET(area[i], strut[i].left, strut[i].top,
507                  screen_physical_size.width - (strut[i].left +
508                                                strut[i].right),
509                  screen_physical_size.height - (strut[i].top +
510                                                 strut[i].bottom));
511     
512 /*
513   #ifdef    XINERAMA
514   if (isXineramaActive()) {
515   // keep each of the ximerama-defined areas inside the strut
516   RectList::iterator xit, xend = xineramaUsableArea.end();
517   for (xit = xineramaUsableArea.begin(); xit != xend; ++xit) {
518   if (xit->x() < usableArea.x()) {
519   xit->setX(usableArea.x());
520   xit->setWidth(xit->width() - usableArea.x());
521   }
522   if (xit->y() < usableArea.y()) {
523   xit->setY(usableArea.y());
524   xit->setHeight(xit->height() - usableArea.y());
525   }
526   if (xit->x() + xit->width() > usableArea.width())
527   xit->setWidth(usableArea.width() - xit->x());
528   if (xit->y() + xit->height() > usableArea.height())
529   xit->setHeight(usableArea.height() - xit->y());
530   }
531   }
532   #endif // XINERAMA
533 */
534         if (!RECT_EQUAL(old_area, area[i])) {
535             /* the area has changed, adjust all the maximized windows */
536             GList *it;
537             for (it = client_list; it; it = it->next) {
538                 Client *c = it->data;
539                 if (i < screen_num_desktops) {
540                     if (c->desktop == i)
541                         client_remaximize(c);
542                 } else {
543                     /* the 'all desktops' size */
544                     if (c->desktop == DESKTOP_ALL)
545                         client_remaximize(c);
546                 }
547             }
548         }
549
550         /* don't set these for the 'all desktops' area */
551         if (i < screen_num_desktops) {
552             dims[(i * 4) + 0] = area[i].x;
553             dims[(i * 4) + 1] = area[i].y;
554             dims[(i * 4) + 2] = area[i].width;
555             dims[(i * 4) + 3] = area[i].height;
556         }
557     }
558     PROP_SETA32(ob_root, net_workarea, cardinal,
559                 dims, 4 * screen_num_desktops);
560     g_free(dims);
561 }
562
563 Rect *screen_area(guint desktop)
564 {
565     if (desktop >= screen_num_desktops) {
566         if (desktop == DESKTOP_ALL)
567             return &area[screen_num_desktops];
568         return NULL;
569     }
570     return &area[desktop];
571 }
572
573 Strut *screen_strut(guint desktop)
574 {
575     if (desktop >= screen_num_desktops) {
576         if (desktop == DESKTOP_ALL)
577             return &strut[screen_num_desktops];
578         return NULL;
579     }
580     return &strut[desktop];
581 }