put the comment where it belongs
[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 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     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_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, utf8, "Openbox");
78     PROP_SET32(support_window, net_supporting_wm_check, window,support_window);
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     XSelectInput(ob_display, ob_root, NoEventMask);
171
172     PROP_ERASE(ob_root, openbox_pid); /* we're not running here no more! */
173     PROP_ERASE(ob_root, net_supported); /* not without us */
174     PROP_ERASE(ob_root, net_showing_desktop); /* don't keep this mode */
175
176     XDestroyWindow(ob_display, support_window);
177
178     for (i = 0; i < screen_desktop_names->len; ++i)
179         g_free(g_ptr_array_index(screen_desktop_names, i));
180     g_ptr_array_free(screen_desktop_names, TRUE);
181     g_free(strut);
182     g_free(area);
183 }
184
185 void screen_resize()
186 {
187     /* XXX RandR support here? */
188     int geometry[2];
189
190     /* Set the _NET_DESKTOP_GEOMETRY hint */
191     geometry[0] = WidthOfScreen(ScreenOfDisplay(ob_display, ob_screen));
192     geometry[1] = HeightOfScreen(ScreenOfDisplay(ob_display, ob_screen));
193     PROP_SET32A(ob_root, net_desktop_geometry, cardinal, geometry, 2);
194     screen_physical_size.width = geometry[0];
195     screen_physical_size.height = geometry[1];
196
197     if (ob_state == State_Starting)
198         return;
199
200     screen_update_struts();
201
202     /* XXX adjust more stuff ? */
203 }
204
205 void screen_set_num_desktops(guint num)
206 {
207     guint i, old;
208     gulong *viewport;
209      
210     g_assert(num > 0);
211   
212     /* move windows on desktops that will no longer exist! */
213     /* XXX
214        std::list<Client*>::iterator it, end = clients.end();
215        for (it = clients.begin(); it != end; ++it) {
216        unsigned int d = (*it)->desktop();
217        if (d >= num && d != 0xffffffff) {
218        XEvent ce;
219        ce.xclient.type = ClientMessage;
220        ce.xclient.message_type = otk::Property::atoms.net_wm_desktop;
221        ce.xclient.display = **otk::display;
222        ce.xclient.window = (*it)->window();
223        ce.xclient.format = 32;
224        ce.xclient.data.l[0] = num - 1;
225        XSendEvent(**otk::display, _info->rootWindow(), false,
226        SubstructureNotifyMask | SubstructureRedirectMask, &ce);
227        }
228        }
229     */
230
231     old = screen_num_desktops;
232     screen_num_desktops = num;
233     PROP_SET32(ob_root, net_number_of_desktops, cardinal, num);
234
235     /* set the viewport hint */
236     viewport = g_new0(gulong, num * 2);
237     PROP_SET32A(ob_root, net_desktop_viewport, cardinal, viewport, num * 2);
238     g_free(viewport);
239
240     /* change our struts/area to match */
241     screen_update_struts();
242
243     /* the number of rows/columns will differ */
244     screen_update_layout();
245
246     /* may be some unnamed desktops that we need to fill in with names */
247     screen_update_desktop_names();
248
249     /* update the focus lists */
250     /* free our lists for the desktops which have disappeared */
251     for (i = num; i < old; ++i)
252         g_list_free(focus_order[i]);
253     /* realloc the array */
254     focus_order = g_renew(GList*, focus_order, num);
255     /* set the new lists to be empty */
256     for (i = old; i < num; ++i)
257         focus_order[i] = NULL;
258
259     dispatch_ob(Event_Ob_NumDesktops, num, old);
260
261     /* change our desktop if we're on one that no longer exists! */
262     if (screen_desktop >= screen_num_desktops)
263         screen_set_desktop(num - 1);
264 }
265
266 void screen_set_desktop(guint num)
267 {
268     GList *it;
269     guint old;
270      
271     g_assert(num < screen_num_desktops);
272
273     g_message("Moving to desktop %u", num);
274   
275     old = screen_desktop;
276     screen_desktop = num;
277     PROP_SET32(ob_root, net_current_desktop, cardinal, num);
278
279     if (old == num) return;
280
281     /* hide windows from bottom to top */
282     for (it = g_list_last(stacking_list); it != NULL; it = it->prev) {
283         Client *c = it->data;
284         if (c->frame->visible && !client_should_show(c))
285             engine_frame_hide(c->frame);
286     }
287
288     /* show windows from top to bottom */
289     for (it = stacking_list; it != NULL; it = it->next) {
290         Client *c = it->data;
291         if (!c->frame->visible && client_should_show(c))
292             engine_frame_show(c->frame);
293     }
294
295     dispatch_ob(Event_Ob_Desktop, num, old);
296 }
297
298 void screen_update_layout()
299 {
300     unsigned long *data = NULL;
301
302     /* defaults */
303     screen_desktop_layout.orientation = prop_atoms.net_wm_orientation_horz;
304     screen_desktop_layout.start_corner = prop_atoms.net_wm_topleft;
305     screen_desktop_layout.rows = 1;
306     screen_desktop_layout.columns = screen_num_desktops;
307
308     if (PROP_GET32A(ob_root, net_desktop_layout, cardinal, data, 4)) {
309         if (data[0] == prop_atoms.net_wm_orientation_vert)
310             screen_desktop_layout.orientation = data[0];
311         if (data[3] == prop_atoms.net_wm_topright)
312             screen_desktop_layout.start_corner = data[3];
313         else if (data[3] == prop_atoms.net_wm_bottomright)
314             screen_desktop_layout.start_corner = data[3];
315         else if (data[3] == prop_atoms.net_wm_bottomleft)
316             screen_desktop_layout.start_corner = data[3];
317
318         /* fill in a zero rows/columns */
319         if (!(data[1] == 0 && data[2] == 0)) { /* both 0's is bad data.. */
320             if (data[1] == 0) {
321                 data[1] = (screen_num_desktops +
322                            screen_num_desktops % data[2]) / data[2];
323             } else if (data[2] == 0) {
324                 data[2] = (screen_num_desktops +
325                            screen_num_desktops % data[1]) / data[1];
326             }
327             screen_desktop_layout.columns = data[1];
328             screen_desktop_layout.rows = data[2];
329         }
330
331         /* bounds checking */
332         if (screen_desktop_layout.orientation ==
333             prop_atoms.net_wm_orientation_horz) {
334             if (screen_desktop_layout.rows > screen_num_desktops)
335                 screen_desktop_layout.rows = screen_num_desktops;
336             if (screen_desktop_layout.columns > ((screen_num_desktops +
337                                                   screen_num_desktops %
338                                                   screen_desktop_layout.rows) /
339                                                  screen_desktop_layout.rows))
340                 screen_desktop_layout.columns =
341                     (screen_num_desktops + screen_num_desktops %
342                      screen_desktop_layout.rows) /
343                     screen_desktop_layout.rows;
344         } else {
345             if (screen_desktop_layout.columns > screen_num_desktops)
346                 screen_desktop_layout.columns = screen_num_desktops;
347             if (screen_desktop_layout.rows > ((screen_num_desktops +
348                                                screen_num_desktops %
349                                                screen_desktop_layout.columns) /
350                                               screen_desktop_layout.columns))
351                 screen_desktop_layout.rows =
352                     (screen_num_desktops + screen_num_desktops %
353                      screen_desktop_layout.columns) /
354                     screen_desktop_layout.columns;
355         }
356         g_free(data);
357     }
358 }
359
360 void screen_update_desktop_names()
361 {
362     guint i;
363
364     /* empty the array */
365     for (i = 0; i < screen_desktop_names->len; ++i)
366         g_free(g_ptr_array_index(screen_desktop_names, i));
367     g_ptr_array_set_size(screen_desktop_names, 0);
368
369     PROP_GETSA(ob_root, net_desktop_names, utf8, screen_desktop_names);
370
371     while (screen_desktop_names->len < screen_num_desktops)
372         g_ptr_array_add(screen_desktop_names, g_strdup("Unnamed Desktop"));
373 }
374
375 void screen_show_desktop(gboolean show)
376 {
377     GList *it;
378     static Window saved_focus = 0;
379      
380     if (show == screen_showing_desktop) return; /* no change */
381
382     /* save the window focus, and restore it when leaving the show-desktop
383        mode */
384     if (show && focus_client)
385         saved_focus = focus_client->window;
386   
387     screen_showing_desktop = show;
388
389     if (show) {
390         /* bottom to top */
391         for (it = g_list_last(stacking_list); it != NULL; it = it->prev) {
392             Client *client = it->data;
393             if (client->type == Type_Desktop)
394                 client_focus(client);
395             else if (client->frame->visible && !client_should_show(client))
396                 engine_frame_hide(client->frame);
397         }
398     } else {
399         /* top to bottom */
400         for (it = stacking_list; it != NULL; it = it->next) {
401             Client *client = it->data;
402             if (!client->frame->visible && client_should_show(client))
403                 engine_frame_show(client->frame);
404         }
405     }
406
407     if (!show) {
408         Client *f = focus_client;
409         if (!f || f->type == Type_Desktop) {
410             Client *c = g_hash_table_lookup(client_map,
411                                             (gpointer)saved_focus);
412             if (c) client_focus(c);
413         }
414     }
415
416     show = !!show; /* make it boolean */
417     PROP_SET32(ob_root, net_showing_desktop, cardinal, show);
418
419     dispatch_ob(Event_Ob_ShowDesktop, show, 0);
420 }
421
422 void screen_install_colormap(Client *client, gboolean install)
423 {
424     if (client == NULL) {
425         if (install)
426             XInstallColormap(ob_display, render_colormap);
427         else
428             XUninstallColormap(ob_display, render_colormap);
429     } else {
430         XWindowAttributes wa;
431         if (XGetWindowAttributes(ob_display, client->window, &wa)) {
432             if (install)
433                 XInstallColormap(ob_display, wa.colormap);
434             else
435                 XUninstallColormap(ob_display, wa.colormap);
436         }
437     }
438 }
439
440 void screen_update_struts()
441 {
442     GSList *it;
443     guint i;
444      
445     if (strut != NULL)
446         g_free(strut);
447     strut = g_new0(Strut, screen_num_desktops + 1);
448
449     for (it = client_list; it; it = it->next) {
450         Client *c = it->data;
451         if (c->iconic) continue; /* these dont count in the strut */
452     
453         if (c->desktop == 0xffffffff) {
454             for (i = 0; i < screen_num_desktops; ++i)
455                 STRUT_ADD(strut[i], c->strut);
456         } else {
457             g_assert(c->desktop < screen_num_desktops);
458             STRUT_ADD(strut[c->desktop], c->strut);
459         }
460         /* apply to the 'all desktops' strut */
461         STRUT_ADD(strut[screen_num_desktops], c->strut);
462     }
463     screen_update_area();
464 }
465
466 static void screen_update_area()
467 {
468     guint i;
469     gulong *dims;
470      
471     if (area != NULL)
472         g_free(area);
473     area = g_new0(Rect, screen_num_desktops + 1);
474      
475     dims = g_new(unsigned long, 4 * screen_num_desktops);
476     for (i = 0; i < screen_num_desktops + 1; ++i) {
477         Rect old_area = area[i];
478 /*
479   #ifdef    XINERAMA
480   // reset to the full areas
481   if (isXineramaActive())
482   xineramaUsableArea = getXineramaAreas();
483   #endif // XINERAMA
484 */
485
486         RECT_SET(area[i], strut[i].left, strut[i].top,
487                  screen_physical_size.width - (strut[i].left +
488                                                strut[i].right),
489                  screen_physical_size.height - (strut[i].top +
490                                                 strut[i].bottom));
491     
492 /*
493   #ifdef    XINERAMA
494   if (isXineramaActive()) {
495   // keep each of the ximerama-defined areas inside the strut
496   RectList::iterator xit, xend = xineramaUsableArea.end();
497   for (xit = xineramaUsableArea.begin(); xit != xend; ++xit) {
498   if (xit->x() < usableArea.x()) {
499   xit->setX(usableArea.x());
500   xit->setWidth(xit->width() - usableArea.x());
501   }
502   if (xit->y() < usableArea.y()) {
503   xit->setY(usableArea.y());
504   xit->setHeight(xit->height() - usableArea.y());
505   }
506   if (xit->x() + xit->width() > usableArea.width())
507   xit->setWidth(usableArea.width() - xit->x());
508   if (xit->y() + xit->height() > usableArea.height())
509   xit->setHeight(usableArea.height() - xit->y());
510   }
511   }
512   #endif // XINERAMA
513 */
514         if (!RECT_EQUAL(old_area, area[i])) {
515             /* the area has changed, adjust all the maximized windows */
516             GSList *it;
517             for (it = client_list; it; it = it->next) {
518                 Client *c = it->data;
519                 if (i < screen_num_desktops) {
520                     if (c->desktop == i)
521                         client_remaximize(c);
522                 } else {
523                     /* the 'all desktops' size */
524                     if (c->desktop == DESKTOP_ALL)
525                         client_remaximize(c);
526                 }
527             }
528         }
529
530         /* don't set these for the 'all desktops' area */
531         if (i < screen_num_desktops) {
532             dims[(i * 4) + 0] = area[i].x;
533             dims[(i * 4) + 1] = area[i].y;
534             dims[(i * 4) + 2] = area[i].width;
535             dims[(i * 4) + 3] = area[i].height;
536         }
537     }
538     PROP_SET32A(ob_root, net_workarea, cardinal,
539                 dims, 4 * screen_num_desktops);
540     g_free(dims);
541 }
542
543 Rect *screen_area(guint desktop)
544 {
545     if (desktop >= screen_num_desktops) {
546         if (desktop == DESKTOP_ALL)
547             return &area[screen_num_desktops];
548         return NULL;
549     }
550     return &area[desktop];
551 }
552
553 Strut *screen_strut(guint desktop)
554 {
555     if (desktop >= screen_num_desktops) {
556         if (desktop == DESKTOP_ALL)
557             return &strut[screen_num_desktops];
558         return NULL;
559     }
560     return &strut[desktop];
561 }