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