erase the openbox_pid hint on the root window when we shutdown
[dana/openbox.git] / openbox / screen.c
1 #include "openbox.h"
2 #include "prop.h"
3 #include "screen.h"
4 #include "client.h"
5 #include "frame.h"
6 #include "engine.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 GPtrArray *screen_desktop_names;
29
30 static Rect  *area = NULL;
31 static Strut *strut = NULL;
32
33 static void screen_update_area();
34
35 static gboolean running;
36 static int another_running(Display *d, XErrorEvent *e)
37 {
38     (void)d;(void)e;
39     g_message("A window manager is already running on screen %d",
40               ob_screen);
41     running = TRUE;
42     return -1;
43 }
44
45 gboolean screen_annex()
46 {
47     XErrorHandler old;
48     Window support;
49     pid_t pid;
50     int i, num_support;
51     Atom *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.left_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 = 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);
75
76     /* set properties on the supporting window */
77     PROP_SETS(support, net_wm_name, utf8, "Openbox");
78     PROP_SET32(support, net_supporting_wm_check, window, support);
79
80     /* set the _NET_SUPPORTED_ATOMS hint */
81     num_support = 48;
82     i = 0;
83     supported = g_new(Atom, 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     g_assert(i == num_support);
133 /*
134   supported[] = prop_atoms.net_wm_moveresize;
135   supported[] = prop_atoms.net_wm_moveresize_size_topleft;
136   supported[] = prop_atoms.net_wm_moveresize_size_topright;
137   supported[] = prop_atoms.net_wm_moveresize_size_bottomleft;
138   supported[] = prop_atoms.net_wm_moveresize_size_bottomright;
139   supported[] = prop_atoms.net_wm_moveresize_move;
140   supported[] = prop_atoms.net_wm_action_stick;
141 */
142
143     PROP_SET32A(ob_root, net_supported, atom, supported, num_support);
144     g_free(supported);
145
146     return TRUE;
147 }
148
149 void screen_startup()
150 {
151     screen_desktop_names = g_ptr_array_new();
152      
153     /* get the initial size */
154     screen_resize();
155
156     screen_set_num_desktops(4);
157     screen_set_desktop(0);
158
159     /* don't start in showing-desktop mode */
160     screen_showing_desktop = FALSE;
161     PROP_SET32(ob_root, net_showing_desktop, cardinal, screen_showing_desktop);
162
163     screen_update_layout();
164 }
165
166 void screen_shutdown()
167 {
168     guint i;
169
170     PROP_ERASE(ob_root, openbox_pid); /* we're not running here no more! */
171
172     for (i = 0; i < screen_desktop_names->len; ++i)
173         g_free(g_ptr_array_index(screen_desktop_names, i));
174     g_ptr_array_free(screen_desktop_names, TRUE);
175     g_free(strut);
176     g_free(area);
177 }
178
179 void screen_resize()
180 {
181     /* Set the _NET_DESKTOP_GEOMETRY hint */
182     /* XXX RandR support here? */
183     int geometry[2];
184
185     geometry[0] = WidthOfScreen(ScreenOfDisplay(ob_display, ob_screen));
186     geometry[1] = HeightOfScreen(ScreenOfDisplay(ob_display, ob_screen));
187     PROP_SET32A(ob_root, net_desktop_geometry, cardinal, geometry, 2);
188     screen_physical_size.width = geometry[0];
189     screen_physical_size.height = geometry[1];
190
191     if (ob_state == State_Starting)
192         return;
193
194     screen_update_struts();
195
196     /* XXX adjust more stuff ? */
197 }
198
199 void screen_set_num_desktops(guint num)
200 {
201     guint i, old;
202     gulong *viewport;
203      
204     g_assert(num > 0);
205   
206     /* move windows on desktops that will no longer exist! */
207     /* XXX
208        std::list<Client*>::iterator it, end = clients.end();
209        for (it = clients.begin(); it != end; ++it) {
210        unsigned int d = (*it)->desktop();
211        if (d >= num && d != 0xffffffff) {
212        XEvent ce;
213        ce.xclient.type = ClientMessage;
214        ce.xclient.message_type = otk::Property::atoms.net_wm_desktop;
215        ce.xclient.display = **otk::display;
216        ce.xclient.window = (*it)->window();
217        ce.xclient.format = 32;
218        ce.xclient.data.l[0] = num - 1;
219        XSendEvent(**otk::display, _info->rootWindow(), false,
220        SubstructureNotifyMask | SubstructureRedirectMask, &ce);
221        }
222        }
223     */
224
225     old = screen_num_desktops;
226     screen_num_desktops = num;
227     PROP_SET32(ob_root, net_number_of_desktops, cardinal, num);
228
229     /* set the viewport hint */
230     viewport = g_new0(gulong, num * 2);
231     PROP_SET32A(ob_root, net_desktop_viewport, cardinal, viewport, num * 2);
232     g_free(viewport);
233
234     /* change our struts/area to match */
235     screen_update_struts();
236
237     /* the number of rows/columns will differ */
238     screen_update_layout();
239
240     /* may be some unnamed desktops that we need to fill in with names */
241     screen_update_desktop_names();
242
243     /* update the focus lists */
244     /* free our lists for the desktops which have disappeared */
245     for (i = num; i < old; ++i)
246         g_list_free(focus_order[i]);
247     /* realloc the array */
248     focus_order = g_renew(GList*, focus_order, num);
249     /* set the new lists to be empty */
250     for (i = old; i < num; ++i)
251         focus_order[i] = NULL;
252
253     dispatch_ob(Event_Ob_NumDesktops, num, old);
254
255     /* change our desktop if we're on one that no longer exists! */
256     if (screen_desktop >= screen_num_desktops)
257         screen_set_desktop(num - 1);
258 }
259
260 void screen_set_desktop(guint num)
261 {
262     GList *it;
263     guint old;
264      
265     g_assert(num < screen_num_desktops);
266
267     g_message("Moving to desktop %u", num);
268   
269     old = screen_desktop;
270     screen_desktop = num;
271     PROP_SET32(ob_root, net_current_desktop, cardinal, num);
272
273     if (old == num) return;
274
275     /* hide windows from bottom to top */
276     for (it = g_list_last(stacking_list); it != NULL; it = it->prev) {
277         Client *c = it->data;
278         if (c->frame->visible && !client_should_show(c))
279             engine_frame_hide(c->frame);
280     }
281
282     /* show windows from top to bottom */
283     for (it = stacking_list; it != NULL; it = it->next) {
284         Client *c = it->data;
285         if (!c->frame->visible && client_should_show(c))
286             engine_frame_show(c->frame);
287     }
288
289     dispatch_ob(Event_Ob_Desktop, num, old);
290 }
291
292 void screen_update_layout()
293 {
294     unsigned long *data = NULL;
295
296     /* defaults */
297     screen_desktop_layout.orientation = prop_atoms.net_wm_orientation_horz;
298     screen_desktop_layout.start_corner = prop_atoms.net_wm_topleft;
299     screen_desktop_layout.rows = 1;
300     screen_desktop_layout.columns = screen_num_desktops;
301
302     if (PROP_GET32A(ob_root, net_desktop_layout, cardinal, data, 4)) {
303         if (data[0] == prop_atoms.net_wm_orientation_vert)
304             screen_desktop_layout.orientation = data[0];
305         if (data[3] == prop_atoms.net_wm_topright)
306             screen_desktop_layout.start_corner = data[3];
307         else if (data[3] == prop_atoms.net_wm_bottomright)
308             screen_desktop_layout.start_corner = data[3];
309         else if (data[3] == prop_atoms.net_wm_bottomleft)
310             screen_desktop_layout.start_corner = data[3];
311
312         /* fill in a zero rows/columns */
313         if (!(data[1] == 0 && data[2] == 0)) { /* both 0's is bad data.. */
314             if (data[1] == 0) {
315                 data[1] = (screen_num_desktops +
316                            screen_num_desktops % data[2]) / data[2];
317             } else if (data[2] == 0) {
318                 data[2] = (screen_num_desktops +
319                            screen_num_desktops % data[1]) / data[1];
320             }
321             screen_desktop_layout.columns = data[1];
322             screen_desktop_layout.rows = data[2];
323         }
324
325         /* bounds checking */
326         if (screen_desktop_layout.orientation ==
327             prop_atoms.net_wm_orientation_horz) {
328             if (screen_desktop_layout.rows > screen_num_desktops)
329                 screen_desktop_layout.rows = screen_num_desktops;
330             if (screen_desktop_layout.columns > ((screen_num_desktops +
331                                                   screen_num_desktops %
332                                                   screen_desktop_layout.rows) /
333                                                  screen_desktop_layout.rows))
334                 screen_desktop_layout.columns =
335                     (screen_num_desktops + screen_num_desktops %
336                      screen_desktop_layout.rows) /
337                     screen_desktop_layout.rows;
338         } else {
339             if (screen_desktop_layout.columns > screen_num_desktops)
340                 screen_desktop_layout.columns = screen_num_desktops;
341             if (screen_desktop_layout.rows > ((screen_num_desktops +
342                                                screen_num_desktops %
343                                                screen_desktop_layout.columns) /
344                                               screen_desktop_layout.columns))
345                 screen_desktop_layout.rows =
346                     (screen_num_desktops + screen_num_desktops %
347                      screen_desktop_layout.columns) /
348                     screen_desktop_layout.columns;
349         }
350         g_free(data);
351     }
352 }
353
354 void screen_update_desktop_names()
355 {
356     guint i;
357
358     /* empty the array */
359     for (i = 0; i < screen_desktop_names->len; ++i)
360         g_free(g_ptr_array_index(screen_desktop_names, i));
361     g_ptr_array_set_size(screen_desktop_names, 0);
362
363     PROP_GETSA(ob_root, net_desktop_names, utf8, screen_desktop_names);
364
365     while (screen_desktop_names->len < screen_num_desktops)
366         g_ptr_array_add(screen_desktop_names, g_strdup("Unnamed Desktop"));
367 }
368
369 void screen_show_desktop(gboolean show)
370 {
371     GList *it;
372     static Window saved_focus = 0;
373      
374     if (show == screen_showing_desktop) return; /* no change */
375
376     /* save the window focus, and restore it when leaving the show-desktop
377        mode */
378     if (show && focus_client)
379         saved_focus = focus_client->window;
380   
381     screen_showing_desktop = show;
382
383     if (show) {
384         /* bottom to top */
385         for (it = g_list_last(stacking_list); it != NULL; it = it->prev) {
386             Client *client = it->data;
387             if (client->type == Type_Desktop)
388                 client_focus(client);
389             else if (client->frame->visible && !client_should_show(client))
390                 engine_frame_hide(client->frame);
391         }
392     } else {
393         /* top to bottom */
394         for (it = stacking_list; it != NULL; it = it->next) {
395             Client *client = it->data;
396             if (!client->frame->visible && client_should_show(client))
397                 engine_frame_show(client->frame);
398         }
399     }
400
401     if (!show) {
402         Client *f = focus_client;
403         if (!f || f->type == Type_Desktop) {
404             Client *c = g_hash_table_lookup(client_map,
405                                             (gpointer)saved_focus);
406             if (c) client_focus(c);
407         }
408     }
409
410     show = !!show; /* make it boolean */
411     PROP_SET32(ob_root, net_showing_desktop, cardinal, show);
412
413     dispatch_ob(Event_Ob_ShowDesktop, show, 0);
414 }
415
416 void screen_install_colormap(Client *client, gboolean install)
417 {
418     if (client == NULL) {
419         if (install)
420             XInstallColormap(ob_display, render_colormap);
421         else
422             XUninstallColormap(ob_display, render_colormap);
423     } else {
424         XWindowAttributes wa;
425         if (XGetWindowAttributes(ob_display, client->window, &wa)) {
426             if (install)
427                 XInstallColormap(ob_display, wa.colormap);
428             else
429                 XUninstallColormap(ob_display, wa.colormap);
430         }
431     }
432 }
433
434 void screen_update_struts()
435 {
436     GSList *it;
437     guint i;
438      
439     if (strut != NULL)
440         g_free(strut);
441     strut = g_new0(Strut, screen_num_desktops + 1);
442
443     for (it = client_list; it; it = it->next) {
444         Client *c = it->data;
445         if (c->iconic) continue; /* these dont count in the strut */
446     
447         if (c->desktop == 0xffffffff) {
448             for (i = 0; i < screen_num_desktops; ++i)
449                 STRUT_ADD(strut[i], c->strut);
450         } else {
451             g_assert(c->desktop < screen_num_desktops);
452             STRUT_ADD(strut[c->desktop], c->strut);
453         }
454         /* apply to the 'all desktops' strut */
455         STRUT_ADD(strut[screen_num_desktops], c->strut);
456     }
457     screen_update_area();
458 }
459
460 static void screen_update_area()
461 {
462     guint i;
463     gulong *dims;
464      
465     if (area != NULL)
466         g_free(area);
467     area = g_new0(Rect, screen_num_desktops + 1);
468      
469     dims = g_new(unsigned long, 4 * screen_num_desktops);
470     for (i = 0; i < screen_num_desktops + 1; ++i) {
471         Rect old_area = area[i];
472 /*
473   #ifdef    XINERAMA
474   // reset to the full areas
475   if (isXineramaActive())
476   xineramaUsableArea = getXineramaAreas();
477   #endif // XINERAMA
478 */
479
480         RECT_SET(area[i], strut[i].left, strut[i].top,
481                  screen_physical_size.width - (strut[i].left +
482                                                strut[i].right),
483                  screen_physical_size.height - (strut[i].top +
484                                                 strut[i].bottom));
485     
486 /*
487   #ifdef    XINERAMA
488   if (isXineramaActive()) {
489   // keep each of the ximerama-defined areas inside the strut
490   RectList::iterator xit, xend = xineramaUsableArea.end();
491   for (xit = xineramaUsableArea.begin(); xit != xend; ++xit) {
492   if (xit->x() < usableArea.x()) {
493   xit->setX(usableArea.x());
494   xit->setWidth(xit->width() - usableArea.x());
495   }
496   if (xit->y() < usableArea.y()) {
497   xit->setY(usableArea.y());
498   xit->setHeight(xit->height() - usableArea.y());
499   }
500   if (xit->x() + xit->width() > usableArea.width())
501   xit->setWidth(usableArea.width() - xit->x());
502   if (xit->y() + xit->height() > usableArea.height())
503   xit->setHeight(usableArea.height() - xit->y());
504   }
505   }
506   #endif // XINERAMA
507 */
508         if (!RECT_EQUAL(old_area, area[i])) {
509             /* the area has changed, adjust all the maximized windows */
510             GSList *it;
511             for (it = client_list; it; it = it->next) {
512                 Client *c = it->data;
513                 if (i < screen_num_desktops) {
514                     if (c->desktop == i)
515                         client_remaximize(c);
516                 } else {
517                     /* the 'all desktops' size */
518                     if (c->desktop == DESKTOP_ALL)
519                         client_remaximize(c);
520                 }
521             }
522         }
523
524         /* don't set these for the 'all desktops' area */
525         if (i < screen_num_desktops) {
526             dims[(i * 4) + 0] = area[i].x;
527             dims[(i * 4) + 1] = area[i].y;
528             dims[(i * 4) + 2] = area[i].width;
529             dims[(i * 4) + 3] = area[i].height;
530         }
531     }
532     PROP_SET32A(ob_root, net_workarea, cardinal,
533                 dims, 4 * screen_num_desktops);
534     g_free(dims);
535 }
536
537 Rect *screen_area(guint desktop)
538 {
539     if (desktop >= screen_num_desktops) {
540         if (desktop == DESKTOP_ALL)
541             return &area[screen_num_desktops];
542         return NULL;
543     }
544     return &area[desktop];
545 }
546
547 Strut *screen_strut(guint desktop)
548 {
549     if (desktop >= screen_num_desktops) {
550         if (desktop == DESKTOP_ALL)
551             return &strut[screen_num_desktops];
552         return NULL;
553     }
554     return &strut[desktop];
555 }