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, so they can
 223                    be fallback targets there. */
 224                 !((Client*)it->data)->fullscreen &&
 225                 client_focus(it->data))
 226                 return;
 227
 228     /* nothing to focus */
 229     focus_set_client(NULL);
 230 }
 231
 232 static void popup_cycle(Client *c, gboolean show)
 233 {
 234     if (!show) {
 235         popup_hide(focus_cycle_popup);
 236     } else {
 237         Rect *a;
 238
 239         a = screen_area(c->desktop);
 240         popup_position(focus_cycle_popup, CenterGravity,
 241                        a->x + a->width / 2, a->y + a->height / 2);
 242 /*        popup_size(focus_cycle_popup, a->height/2, a->height/16);
 243         popup_show(focus_cycle_popup, c->title,
 244                    client_icon(c, a->height/16, a->height/16));
 245 */
 246         /* XXX the size and the font extents need to be related on some level
 247          */
 248         popup_size(focus_cycle_popup, 320, 48);
 249
 250         /* use the transient's parent's title/icon */
 251         while (c->transient_for && c->transient_for != TRAN_GROUP)
 252             c = c->transient_for;
 253
 254         popup_show(focus_cycle_popup, (c->iconic ? c->icon_title : c->title),
 255                    client_icon(c, 48, 48));
 256     }
 257 }
 258
 259 Client *focus_cycle(gboolean forward, gboolean linear, gboolean done,
 260                     gboolean cancel)
 261 {
 262     static Client *first = NULL;
 263     static Client *t = NULL;
 264     static GList *order = NULL;
 265     GList *it, *start, *list;
 266     Client *ft;
 267
 268     if (cancel) {
 269         if (focus_cycle_target)
 270             frame_adjust_focus(focus_cycle_target->frame, FALSE);
 271         if (focus_client)
 272             frame_adjust_focus(focus_client->frame, TRUE);
 273         goto done_cycle;
 274     } else if (done) {
 275         if (focus_cycle_target)
 276             client_activate(focus_cycle_target);
 277         goto done_cycle;
 278     }
 279     if (!first)
 280         grab_pointer(TRUE, None);
 281
 282     if (!first) first = focus_client;
 283     if (!focus_cycle_target) focus_cycle_target = focus_client;
 284
 285     if (linear) list = client_list;
 286     else        list = focus_order[screen_desktop];
 287
 288     start = it = g_list_find(list, focus_cycle_target);
 289     if (!start) /* switched desktops or something? */
 290         start = it = forward ? g_list_last(list) : g_list_first(list);
 291     if (!start) goto done_cycle;
 292
 293     do {
 294         if (forward) {
 295             it = it->next;
 296             if (it == NULL) it = g_list_first(list);
 297         } else {
 298             it = it->prev;
 299             if (it == NULL) it = g_list_last(list);
 300         }
 301         /*ft = client_focus_target(it->data);*/
 302         ft = it->data;
 303         if (ft->transients == NULL && /*ft == it->data &&*/client_normal(ft) &&
 304             (ft->can_focus || ft->focus_notify) &&
 305             (ft->desktop == screen_desktop || ft->desktop == DESKTOP_ALL)) {
 306             if (ft != focus_cycle_target) { /* prevents flicker */
 307                 if (focus_cycle_target)
 308                     frame_adjust_focus(focus_cycle_target->frame, FALSE);
 309                 focus_cycle_target = ft;
 310                 frame_adjust_focus(focus_cycle_target->frame, TRUE);
 311             }
 312             popup_cycle(ft, config_focus_popup);
 313             return ft;
 314         }
 315     } while (it != start);
 316
 317 done_cycle:
 318     t = NULL;
 319     first = NULL;
 320     focus_cycle_target = NULL;
 321     g_list_free(order);
 322     order = NULL;
 323
 324     popup_cycle(ft, FALSE);
 325     grab_pointer(FALSE, None);
 326
 327     return NULL;
 328 }
 329
 330 void focus_order_add_new(Client *c)
 331 {
 332     guint d, i;
 333
 334     if (c->iconic)
 335         focus_order_to_top(c);
 336     else {
 337         d = c->desktop;
 338         if (d == DESKTOP_ALL) {
 339             for (i = 0; i < screen_num_desktops; ++i) {
 340                 if (focus_order[i] && ((Client*)focus_order[i]->data)->iconic)
 341                     focus_order[i] = g_list_insert(focus_order[i], c, 0);
 342                 else
 343                     focus_order[i] = g_list_insert(focus_order[i], c, 1);
 344             }
 345         } else
 346              if (focus_order[d] && ((Client*)focus_order[d]->data)->iconic)
 347                 focus_order[d] = g_list_insert(focus_order[d], c, 0);
 348             else
 349                 focus_order[d] = g_list_insert(focus_order[d], c, 1);
 350     }
 351 }
 352
 353 void focus_order_remove(Client *c)
 354 {
 355     guint d, i;
 356
 357     d = c->desktop;
 358     if (d == DESKTOP_ALL) {
 359         for (i = 0; i < screen_num_desktops; ++i)
 360             focus_order[i] = g_list_remove(focus_order[i], c);
 361     } else
 362         focus_order[d] = g_list_remove(focus_order[d], c);
 363 }
 364
 365 static void to_top(Client *c, guint d)
 366 {
 367     focus_order[d] = g_list_remove(focus_order[d], c);
 368     if (!c->iconic) {
 369         focus_order[d] = g_list_prepend(focus_order[d], c);
 370     } else {
 371         GList *it;
 372
 373         /* insert before first iconic window */
 374         for (it = focus_order[d];
 375              it && !((Client*)it->data)->iconic; it = it->next);
 376         g_list_insert_before(focus_order[d], it, c);
 377     }
 378 }
 379
 380 void focus_order_to_top(Client *c)
 381 {
 382     guint d, i;
 383
 384     d = c->desktop;
 385     if (d == DESKTOP_ALL) {
 386         for (i = 0; i < screen_num_desktops; ++i)
 387             to_top(c, i);
 388     } else
 389         to_top(c, d);
 390 }
 391
 392 static void to_bottom(Client *c, guint d)
 393 {
 394     focus_order[d] = g_list_remove(focus_order[d], c);
 395     if (c->iconic) {
 396         focus_order[d] = g_list_append(focus_order[d], c);
 397     } else {
 398         GList *it;
 399
 400         /* insert before first iconic window */
 401         for (it = focus_order[d];
 402              it && !((Client*)it->data)->iconic; it = it->next);
 403         g_list_insert_before(focus_order[d], it, c);
 404     }
 405 }
 406
 407 void focus_order_to_bottom(Client *c)
 408 {
 409     guint d, i;
 410
 411     d = c->desktop;
 412     if (d == DESKTOP_ALL) {
 413         for (i = 0; i < screen_num_desktops; ++i)
 414             to_bottom(c, i);
 415     } else
 416         to_bottom(c, d);
 417 }