remove a todo item that seems to be.. done!
[mikachu/openbox.git] / openbox / focus.c
1 #include "event.h"
2 #include "openbox.h"
3 #include "grab.h"
4 #include "framerender.h"
5 #include "client.h"
6 #include "config.h"
7 #include "frame.h"
8 #include "screen.h"
9 #include "group.h"
10 #include "prop.h"
11 #include "dispatch.h"
12 #include "focus.h"
13 #include "parse.h"
14 #include "stacking.h"
15 #include "popup.h"
16
17 #include <X11/Xlib.h>
18 #include <glib.h>
19
20 Client *focus_client = NULL;
21 GList **focus_order = NULL; /* these lists are created when screen_startup
22                                sets the number of desktops */
23
24 Window focus_backup = None;
25
26 static Client *focus_cycle_target = NULL;
27 static Popup *focus_cycle_popup = NULL;
28
29 void focus_startup()
30 {
31     /* create the window which gets focus when no clients get it. Have to
32        make it override-redirect so we don't try manage it, since it is
33        mapped. */
34     XSetWindowAttributes attrib;
35
36     focus_client = NULL;
37     focus_cycle_popup = popup_new(TRUE);
38
39     attrib.override_redirect = TRUE;
40     focus_backup = XCreateWindow(ob_display, ob_root,
41                                  -100, -100, 1, 1, 0,
42                                  CopyFromParent, InputOutput, CopyFromParent,
43                                  CWOverrideRedirect, &attrib);
44     XMapRaised(ob_display, focus_backup);
45
46     /* start with nothing focused */
47     focus_set_client(NULL);
48 }
49
50 void focus_shutdown()
51 {
52     guint i;
53
54     for (i = 0; i < screen_num_desktops; ++i)
55         g_list_free(focus_order[i]);
56     g_free(focus_order);
57     focus_order = NULL;
58
59     popup_free(focus_cycle_popup);
60     focus_cycle_popup = NULL;
61
62     XDestroyWindow(ob_display, focus_backup);
63
64     /* reset focus to root */
65     XSetInputFocus(ob_display, PointerRoot, RevertToPointerRoot,
66                    event_lasttime);
67 }
68
69 static void push_to_top(Client *client)
70 {
71     guint desktop;
72
73     desktop = client->desktop;
74     if (desktop == DESKTOP_ALL) desktop = screen_desktop;
75     focus_order[desktop] = g_list_remove(focus_order[desktop], client);
76     focus_order[desktop] = g_list_prepend(focus_order[desktop], client);
77 }
78
79 void focus_set_client(Client *client)
80 {
81     Window active;
82     Client *old;
83
84     /* uninstall the old colormap, and install the new one */
85     screen_install_colormap(focus_client, FALSE);
86     screen_install_colormap(client, TRUE);
87
88     if (client == NULL) {
89         /* when nothing will be focused, send focus to the backup target */
90         XSetInputFocus(ob_display, focus_backup, RevertToPointerRoot,
91                        event_lasttime);
92         XSync(ob_display, FALSE);
93     }
94
95     /* in the middle of cycling..? kill it. */
96     if (focus_cycle_target)
97         focus_cycle(TRUE, TRUE, TRUE, TRUE);
98
99     old = focus_client;
100     focus_client = client;
101
102     /* move to the top of the list */
103     if (client != NULL)
104         push_to_top(client);
105
106     /* set the NET_ACTIVE_WINDOW hint, but preserve it on shutdown */
107     if (ob_state != State_Exiting) {
108         active = client ? client->window : None;
109         PROP_SET32(ob_root, net_active_window, window, active);
110     }
111
112     if (focus_client != NULL)
113         dispatch_client(Event_Client_Focus, focus_client, 0, 0);
114     if (old != NULL)
115         dispatch_client(Event_Client_Unfocus, old, 0, 0);
116 }
117
118 static gboolean focus_under_pointer()
119 {
120     int x, y;
121     GList *it;
122
123     if (ob_pointer_pos(&x, &y)) {
124         for (it = stacking_list; it != NULL; it = it->next) {
125             if (WINDOW_IS_CLIENT(it->data)) {
126                 Client *c = WINDOW_AS_CLIENT(it->data);
127                 if (c->desktop == screen_desktop &&
128                     RECT_CONTAINS(c->frame->area, x, y))
129                     break;
130             }
131         }
132         if (it != NULL) {
133             g_assert(WINDOW_IS_CLIENT(it->data));
134             return client_normal(it->data) && client_focus(it->data);
135         }
136     }
137     return FALSE;
138 }
139
140 /* finds the first transient that isn't 'skip' and ensure's that client_normal
141  is true for it */
142 static Client *find_transient_recursive(Client *c, Client *top, Client *skip)
143 {
144     GSList *it;
145     Client *ret;
146
147     for (it = c->transients; it; it = it->next) {
148         if (it->data == top) return NULL;
149         ret = find_transient_recursive(it->data, top, skip);
150         if (ret && ret != skip && client_normal(ret)) return ret;
151         if (it->data != skip && client_normal(it->data)) return it->data;
152     }
153     return NULL;
154 }
155
156 static gboolean focus_fallback_transient(Client *top, Client *old)
157 {
158     Client *target = find_transient_recursive(top, top, old);
159     if (!target) {
160         /* make sure client_normal is true always */
161         if (!client_normal(top))
162             return FALSE;
163         target = top; /* no transient, keep the top */
164     }
165     return client_focus(target);
166 }
167
168 void focus_fallback(FallbackType type)
169 {
170     GList *it;
171     Client *old = NULL;
172
173     old = focus_client;
174
175     /* unfocus any focused clients.. they can be focused by Pointer events
176        and such, and then when I try focus them, I won't get a FocusIn event
177        at all for them.
178     */
179     focus_set_client(NULL);
180
181     if (!(type == Fallback_Desktop ?
182           config_focus_last_on_desktop : config_focus_last)) {
183         if (config_focus_follow) focus_under_pointer();
184         return;
185     }
186
187     if (type == Fallback_Unfocusing && old) {
188         /* try for transient relations */
189         if (old->transient_for) {
190             if (old->transient_for == TRAN_GROUP) {
191                 for (it = focus_order[screen_desktop]; it; it = it->next) {
192                     GSList *sit;
193
194                     for (sit = old->group->members; sit; sit = sit->next)
195                         if (sit->data == it->data)
196                             if (focus_fallback_transient(sit->data, old))
197                                 return;
198                 }
199             } else {
200                 if (focus_fallback_transient(old->transient_for, old))
201                     return;
202             }
203         }
204
205         /* try for group relations */
206         if (old->group) {
207             GSList *sit;
208
209             for (it = focus_order[screen_desktop]; it != NULL; it = it->next)
210                 for (sit = old->group->members; sit; sit = sit->next)
211                     if (sit->data == it->data)
212                         if (sit->data != old && client_normal(sit->data))
213                             if (client_focus(sit->data))
214                                 return;
215         }
216     }
217
218     for (it = focus_order[screen_desktop]; it != NULL; it = it->next)
219         if (type != Fallback_Unfocusing || it->data != old)
220             if (client_normal(it->data) &&
221                 /* dont fall back to 'anonymous' fullscreen windows. theres no
222                    checks for this is in transient/group fallbacks. */
223                 !((Client*)it->data)->fullscreen &&
224                 client_focus(it->data))
225                 return;
226
227     /* nothing to focus */
228     focus_set_client(NULL);
229 }
230
231 static void popup_cycle(Client *c, gboolean show)
232 {
233     if (!show) {
234         popup_hide(focus_cycle_popup);
235     } else {
236         Rect *a;
237
238         a = screen_area(c->desktop);
239         popup_position(focus_cycle_popup, CenterGravity,
240                        a->x + a->width / 2, a->y + a->height / 2);
241 /*        popup_size(focus_cycle_popup, a->height/2, a->height/16);
242         popup_show(focus_cycle_popup, c->title,
243                    client_icon(c, a->height/16, a->height/16));
244 */
245         /* XXX the size and the font extents need to be related on some level
246          */
247         popup_size(focus_cycle_popup, 320, 48);
248
249         /* use the transient's parent's title/icon */
250         while (c->transient_for && c->transient_for != TRAN_GROUP)
251             c = c->transient_for;
252
253         popup_show(focus_cycle_popup, (c->iconic ? c->icon_title : c->title),
254                    client_icon(c, 48, 48));
255     }
256 }
257
258 Client *focus_cycle(gboolean forward, gboolean linear, gboolean done,
259                     gboolean cancel)
260 {
261     static Client *first = NULL;
262     static Client *t = NULL;
263     static GList *order = NULL;
264     GList *it, *start, *list;
265     Client *ft;
266
267     if (cancel) {
268         if (focus_cycle_target)
269             frame_adjust_focus(focus_cycle_target->frame, FALSE);
270         if (focus_client)
271             frame_adjust_focus(focus_client->frame, TRUE);
272         goto done_cycle;
273     } else if (done) {
274         if (focus_cycle_target)
275             client_activate(focus_cycle_target);
276         goto done_cycle;
277     }
278     if (!first)
279         grab_pointer(TRUE, None);
280
281     if (!first) first = focus_client;
282     if (!focus_cycle_target) focus_cycle_target = focus_client;
283
284     if (linear) list = client_list;
285     else        list = focus_order[screen_desktop];
286
287     start = it = g_list_find(list, focus_cycle_target);
288     if (!start) /* switched desktops or something? */
289         start = it = forward ? g_list_last(list) : g_list_first(list);
290     if (!start) goto done_cycle;
291
292     do {
293         if (forward) {
294             it = it->next;
295             if (it == NULL) it = g_list_first(list);
296         } else {
297             it = it->prev;
298             if (it == NULL) it = g_list_last(list);
299         }
300         /*ft = client_focus_target(it->data);*/
301         ft = it->data;
302         if (ft->transients == NULL && /*ft == it->data &&*/client_normal(ft) &&
303             (ft->can_focus || ft->focus_notify) &&
304             (ft->desktop == screen_desktop || ft->desktop == DESKTOP_ALL)) {
305             if (ft != focus_cycle_target) { /* prevents flicker */
306                 if (focus_cycle_target)
307                     frame_adjust_focus(focus_cycle_target->frame, FALSE);
308                 focus_cycle_target = ft;
309                 frame_adjust_focus(focus_cycle_target->frame, TRUE);
310             }
311             popup_cycle(ft, config_focus_popup);
312             return ft;
313         }
314     } while (it != start);
315
316 done_cycle:
317     t = NULL;
318     first = NULL;
319     focus_cycle_target = NULL;
320     g_list_free(order);
321     order = NULL;
322
323     popup_cycle(ft, FALSE);
324     grab_pointer(FALSE, None);
325
326     return NULL;
327 }
328
329 void focus_order_add_new(Client *c)
330 {
331     guint d, i;
332
333     if (c->iconic)
334         focus_order_to_top(c);
335     else {
336         d = c->desktop;
337         if (d == DESKTOP_ALL) {
338             for (i = 0; i < screen_num_desktops; ++i) {
339                 if (focus_order[i] && ((Client*)focus_order[i]->data)->iconic)
340                     focus_order[i] = g_list_insert(focus_order[i], c, 0);
341                 else
342                     focus_order[i] = g_list_insert(focus_order[i], c, 1);
343             }
344         } else
345              if (focus_order[d] && ((Client*)focus_order[d]->data)->iconic)
346                 focus_order[d] = g_list_insert(focus_order[d], c, 0);
347             else
348                 focus_order[d] = g_list_insert(focus_order[d], c, 1);
349     }
350 }
351
352 void focus_order_remove(Client *c)
353 {
354     guint d, i;
355
356     d = c->desktop;
357     if (d == DESKTOP_ALL) {
358         for (i = 0; i < screen_num_desktops; ++i)
359             focus_order[i] = g_list_remove(focus_order[i], c);
360     } else
361         focus_order[d] = g_list_remove(focus_order[d], c);
362 }
363
364 static void to_top(Client *c, guint d)
365 {
366     focus_order[d] = g_list_remove(focus_order[d], c);
367     if (!c->iconic) {
368         focus_order[d] = g_list_prepend(focus_order[d], c);
369     } else {
370         GList *it;
371
372         /* insert before first iconic window */
373         for (it = focus_order[d];
374              it && !((Client*)it->data)->iconic; it = it->next);
375         g_list_insert_before(focus_order[d], it, c);
376     }
377 }
378
379 void focus_order_to_top(Client *c)
380 {
381     guint d, i;
382
383     d = c->desktop;
384     if (d == DESKTOP_ALL) {
385         for (i = 0; i < screen_num_desktops; ++i)
386             to_top(c, i);
387     } else
388         to_top(c, d);
389 }
390
391 static void to_bottom(Client *c, guint d)
392 {
393     focus_order[d] = g_list_remove(focus_order[d], c);
394     if (c->iconic) {
395         focus_order[d] = g_list_append(focus_order[d], c);
396     } else {
397         GList *it;
398
399         /* insert before first iconic window */
400         for (it = focus_order[d];
401              it && !((Client*)it->data)->iconic; it = it->next);
402         g_list_insert_before(focus_order[d], it, c);
403     }
404 }
405
406 void focus_order_to_bottom(Client *c)
407 {
408     guint d, i;
409
410     d = c->desktop;
411     if (d == DESKTOP_ALL) {
412         for (i = 0; i < screen_num_desktops; ++i)
413             to_bottom(c, i);
414     } else
415         to_bottom(c, d);
416 }