fixes for handling char**s
[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.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, "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(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     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_SETA32(ob_root, net_supported, atom, supported, num_support);
144     g_free(supported);
145
146     return TRUE;
147 }
148
149 void screen_startup()
150 {
151     GSList *it;
152     guint i;
153
154     /* get the initial size */
155     screen_resize();
156
157     /* set the names */
158     screen_desktop_names = g_new(char*,
159                                  g_slist_length(config_desktops_names) + 1);
160     for (i = 0, it = config_desktops_names; it; ++i, it = it->next)
161         screen_desktop_names[i] = it->data; /* dont strdup */
162     screen_desktop_names[i] = NULL;
163     PROP_SETSS(ob_root, net_desktop_names, screen_desktop_names);
164     g_free(screen_desktop_names); /* dont free the individual strings */
165     screen_desktop_names = NULL;
166
167     screen_num_desktops = 0;
168     screen_set_num_desktops(config_desktops_num);
169     screen_desktop = 0;
170     screen_set_desktop(0);
171
172     /* don't start in showing-desktop mode */
173     screen_showing_desktop = FALSE;
174     PROP_SET32(ob_root, net_showing_desktop, cardinal, screen_showing_desktop);
175
176     screen_update_layout();
177 }
178
179 void screen_shutdown()
180 {
181     XSelectInput(ob_display, ob_root, NoEventMask);
182
183     PROP_ERASE(ob_root, openbox_pid); /* we're not running here no more! */
184     PROP_ERASE(ob_root, net_supported); /* not without us */
185     PROP_ERASE(ob_root, net_showing_desktop); /* don't keep this mode */
186
187     XDestroyWindow(ob_display, support_window);
188
189     g_strfreev(screen_desktop_names);
190     g_free(strut);
191     g_free(area);
192 }
193
194 void screen_resize()
195 {
196     /* XXX RandR support here? */
197     guint32 geometry[2];
198
199     /* Set the _NET_DESKTOP_GEOMETRY hint */
200     geometry[0] = WidthOfScreen(ScreenOfDisplay(ob_display, ob_screen));
201     geometry[1] = HeightOfScreen(ScreenOfDisplay(ob_display, ob_screen));
202     PROP_SETA32(ob_root, net_desktop_geometry, cardinal, geometry, 2);
203     screen_physical_size.width = geometry[0];
204     screen_physical_size.height = geometry[1];
205
206     if (ob_state == State_Starting)
207         return;
208
209     screen_update_struts();
210
211     /* XXX adjust more stuff ? */
212 }
213
214 void screen_set_num_desktops(guint num)
215 {
216     guint i, old;
217     guint32 *viewport;
218     GList *it;
219
220     g_assert(num > 0);
221
222     old = screen_num_desktops;
223     screen_num_desktops = num;
224     PROP_SET32(ob_root, net_number_of_desktops, cardinal, num);
225
226     /* set the viewport hint */
227     viewport = g_new0(guint32, num * 2);
228     PROP_SETA32(ob_root, net_desktop_viewport, cardinal, viewport, num * 2);
229     g_free(viewport);
230
231     /* change our struts/area to match */
232     screen_update_struts();
233
234     /* the number of rows/columns will differ */
235     screen_update_layout();
236
237     /* may be some unnamed desktops that we need to fill in with names */
238     screen_update_desktop_names();
239
240     /* update the focus lists */
241     /* free our lists for the desktops which have disappeared */
242     for (i = num; i < old; ++i)
243         g_list_free(focus_order[i]);
244     /* realloc the array */
245     focus_order = g_renew(GList*, focus_order, num);
246     /* set the new lists to be empty */
247     for (i = old; i < num; ++i)
248         focus_order[i] = NULL;
249
250     /* move windows on desktops that will no longer exist! */
251     for (it = client_list; it != NULL; it = it->next) {
252         Client *c = it->data;
253         if (c->desktop >= num)
254             client_set_desktop(c, num - 1, FALSE);
255     }
256
257     dispatch_ob(Event_Ob_NumDesktops, num, old);
258
259     /* change our desktop if we're on one that no longer exists! */
260     if (screen_desktop >= screen_num_desktops)
261         screen_set_desktop(num - 1);
262 }
263
264 void screen_set_desktop(guint num)
265 {
266     GList *it;
267     guint old;
268     XEvent e;
269      
270     g_assert(num < screen_num_desktops);
271
272     old = screen_desktop;
273     screen_desktop = num;
274     PROP_SET32(ob_root, net_current_desktop, cardinal, num);
275
276     if (old == num) return;
277
278     g_message("Moving to desktop %d", num+1);
279
280     /* show windows before hiding the rest to lessen the enter/leave events */
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             frame_show(c->frame);
287     }
288
289     /* hide windows from bottom to top */
290     for (it = g_list_last(stacking_list); it != NULL; it = it->prev) {
291         Client *c = it->data;
292         if (c->frame->visible && !client_should_show(c))
293             frame_hide(c->frame);
294     }
295
296     /* focus the last focused window on the desktop, and ignore enter events
297        from the switch so it doesnt mess with the focus */
298     XSync(ob_display, FALSE);
299     while (XCheckTypedEvent(ob_display, EnterNotify, &e));
300     focus_fallback(Fallback_Desktop);
301
302     dispatch_ob(Event_Ob_Desktop, num, old);
303 }
304
305 void screen_update_layout()
306 {
307     guint32 *data = NULL;
308     guint num;
309
310     /* defaults */
311     screen_desktop_layout.orientation = prop_atoms.net_wm_orientation_horz;
312     screen_desktop_layout.start_corner = prop_atoms.net_wm_topleft;
313     screen_desktop_layout.rows = 1;
314     screen_desktop_layout.columns = screen_num_desktops;
315
316     if (PROP_GETA32(ob_root, net_desktop_layout, cardinal, &data, &num)) {
317         if (num == 3 || num == 4) {
318             if (data[0] == prop_atoms.net_wm_orientation_vert)
319                 screen_desktop_layout.orientation = data[0];
320             if (num == 3)
321                 screen_desktop_layout.start_corner =
322                     prop_atoms.net_wm_topright;
323             else {
324                 if (data[3] == prop_atoms.net_wm_topright)
325                     screen_desktop_layout.start_corner = data[3];
326                 else if (data[3] == prop_atoms.net_wm_bottomright)
327                     screen_desktop_layout.start_corner = data[3];
328                 else if (data[3] == prop_atoms.net_wm_bottomleft)
329                     screen_desktop_layout.start_corner = data[3];
330             }
331
332             /* fill in a zero rows/columns */
333             if (!(data[1] == 0 && data[2] == 0)) { /* both 0's is bad data.. */
334                 if (data[1] == 0) {
335                     data[1] = (screen_num_desktops +
336                                screen_num_desktops % data[2]) / data[2];
337                 } else if (data[2] == 0) {
338                     data[2] = (screen_num_desktops +
339                                screen_num_desktops % data[1]) / data[1];
340                 }
341                 screen_desktop_layout.columns = data[1];
342                 screen_desktop_layout.rows = data[2];
343             }
344
345             /* bounds checking */
346             if (screen_desktop_layout.orientation ==
347                 prop_atoms.net_wm_orientation_horz) {
348                 if (screen_desktop_layout.rows > screen_num_desktops)
349                     screen_desktop_layout.rows = screen_num_desktops;
350                 if (screen_desktop_layout.columns >
351                     ((screen_num_desktops + screen_num_desktops %
352                       screen_desktop_layout.rows) /
353                      screen_desktop_layout.rows))
354                     screen_desktop_layout.columns =
355                         (screen_num_desktops + screen_num_desktops %
356                          screen_desktop_layout.rows) /
357                         screen_desktop_layout.rows;
358             } else {
359                 if (screen_desktop_layout.columns > screen_num_desktops)
360                     screen_desktop_layout.columns = screen_num_desktops;
361                 if (screen_desktop_layout.rows >
362                     ((screen_num_desktops + screen_num_desktops %
363                       screen_desktop_layout.columns) /
364                      screen_desktop_layout.columns))
365                     screen_desktop_layout.rows =
366                         (screen_num_desktops + screen_num_desktops %
367                          screen_desktop_layout.columns) /
368                         screen_desktop_layout.columns;
369             }
370         }
371         g_free(data);
372     }
373 }
374
375 void screen_update_desktop_names()
376 {
377     guint i;
378
379     /* empty the array */
380     g_strfreev(screen_desktop_names);
381     screen_desktop_names = NULL;
382
383     if (PROP_GETSS(ob_root, net_desktop_names, utf8, &screen_desktop_names))
384         for (i = 0; screen_desktop_names[i] && i <= screen_num_desktops; ++i);
385     else
386         i = 0;
387     g_message("I %d", i);
388     if (i <= screen_num_desktops) {
389         screen_desktop_names = g_renew(char*, screen_desktop_names,
390                                        screen_num_desktops + 1);
391         screen_desktop_names[screen_num_desktops] = NULL;
392         for (; i < screen_num_desktops; ++i)
393             screen_desktop_names[i] = g_strdup("Unnamed Desktop");
394     }
395 }
396
397 void screen_show_desktop(gboolean show)
398 {
399     GList *it;
400      
401     if (show == screen_showing_desktop) return; /* no change */
402
403     screen_showing_desktop = show;
404
405     if (show) {
406         /* bottom to top */
407         for (it = g_list_last(stacking_list); it != NULL; it = it->prev) {
408             Client *client = it->data;
409             if (client->frame->visible && !client_should_show(client))
410                 frame_hide(client->frame);
411         }
412     } else {
413         /* top to bottom */
414         for (it = stacking_list; it != NULL; it = it->next) {
415             Client *client = it->data;
416             if (!client->frame->visible && client_should_show(client))
417                 frame_show(client->frame);
418         }
419     }
420
421     show = !!show; /* make it boolean */
422     PROP_SET32(ob_root, net_showing_desktop, cardinal, show);
423
424     dispatch_ob(Event_Ob_ShowDesktop, show, 0);
425 }
426
427 void screen_install_colormap(Client *client, gboolean install)
428 {
429     XWindowAttributes wa;
430
431     if (client == NULL) {
432         if (install)
433             XInstallColormap(ob_display, render_colormap);
434         else
435             XUninstallColormap(ob_display, render_colormap);
436     } else {
437         if (XGetWindowAttributes(ob_display, client->window, &wa) &&
438             wa.colormap != None) {
439             if (install)
440                 XInstallColormap(ob_display, wa.colormap);
441             else
442                 XUninstallColormap(ob_display, wa.colormap);
443         }
444     }
445 }
446
447 void screen_update_struts()
448 {
449     GList *it;
450     guint i;
451      
452     g_free(strut);
453     strut = g_new0(Strut, screen_num_desktops + 1);
454
455     for (it = client_list; it != NULL; it = it->next) {
456         Client *c = it->data;
457         if (c->iconic) continue; /* these dont count in the strut */
458     
459         if (c->desktop == 0xffffffff) {
460             for (i = 0; i < screen_num_desktops; ++i)
461                 STRUT_ADD(strut[i], c->strut);
462         } else {
463             g_assert(c->desktop < screen_num_desktops);
464             STRUT_ADD(strut[c->desktop], c->strut);
465         }
466         /* apply to the 'all desktops' strut */
467         STRUT_ADD(strut[screen_num_desktops], c->strut);
468     }
469     screen_update_area();
470 }
471
472 static void screen_update_area()
473 {
474     guint i;
475     guint32 *dims;
476
477     g_free(area);
478     area = g_new0(Rect, screen_num_desktops + 1);
479      
480     dims = g_new(guint32, 4 * screen_num_desktops);
481     for (i = 0; i < screen_num_desktops + 1; ++i) {
482         Rect old_area = area[i];
483 /*
484   #ifdef    XINERAMA
485   // reset to the full areas
486   if (isXineramaActive())
487   xineramaUsableArea = getXineramaAreas();
488   #endif // XINERAMA
489 */
490
491         RECT_SET(area[i], strut[i].left, strut[i].top,
492                  screen_physical_size.width - (strut[i].left +
493                                                strut[i].right),
494                  screen_physical_size.height - (strut[i].top +
495                                                 strut[i].bottom));
496     
497 /*
498   #ifdef    XINERAMA
499   if (isXineramaActive()) {
500   // keep each of the ximerama-defined areas inside the strut
501   RectList::iterator xit, xend = xineramaUsableArea.end();
502   for (xit = xineramaUsableArea.begin(); xit != xend; ++xit) {
503   if (xit->x() < usableArea.x()) {
504   xit->setX(usableArea.x());
505   xit->setWidth(xit->width() - usableArea.x());
506   }
507   if (xit->y() < usableArea.y()) {
508   xit->setY(usableArea.y());
509   xit->setHeight(xit->height() - usableArea.y());
510   }
511   if (xit->x() + xit->width() > usableArea.width())
512   xit->setWidth(usableArea.width() - xit->x());
513   if (xit->y() + xit->height() > usableArea.height())
514   xit->setHeight(usableArea.height() - xit->y());
515   }
516   }
517   #endif // XINERAMA
518 */
519         if (!RECT_EQUAL(old_area, area[i])) {
520             /* the area has changed, adjust all the maximized windows */
521             GList *it;
522             for (it = client_list; it; it = it->next) {
523                 Client *c = it->data;
524                 if (i < screen_num_desktops) {
525                     if (c->desktop == i)
526                         client_remaximize(c);
527                 } else {
528                     /* the 'all desktops' size */
529                     if (c->desktop == DESKTOP_ALL)
530                         client_remaximize(c);
531                 }
532             }
533         }
534
535         /* don't set these for the 'all desktops' area */
536         if (i < screen_num_desktops) {
537             dims[(i * 4) + 0] = area[i].x;
538             dims[(i * 4) + 1] = area[i].y;
539             dims[(i * 4) + 2] = area[i].width;
540             dims[(i * 4) + 3] = area[i].height;
541         }
542     }
543     PROP_SETA32(ob_root, net_workarea, cardinal,
544                 dims, 4 * screen_num_desktops);
545     g_free(dims);
546 }
547
548 Rect *screen_area(guint desktop)
549 {
550     if (desktop >= screen_num_desktops) {
551         if (desktop == DESKTOP_ALL)
552             return &area[screen_num_desktops];
553         return NULL;
554     }
555     return &area[desktop];
556 }
557
558 Strut *screen_strut(guint desktop)
559 {
560     if (desktop >= screen_num_desktops) {
561         if (desktop == DESKTOP_ALL)
562             return &strut[screen_num_desktops];
563         return NULL;
564     }
565     return &strut[desktop];
566 }