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 "stacking.h"
  14 #include "popup.h"
  15
  16 #include <X11/Xlib.h>
  17 #include <glib.h>
  18 #include <assert.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 #ifdef DEBUG_FOCUS
  85     g_message("focus_set_client 0x%lx", client ? client->window : 0);
  86 #endif
  87
  88     /* uninstall the old colormap, and install the new one */
  89     screen_install_colormap(focus_client, FALSE);
  90     screen_install_colormap(client, TRUE);
  91
  92     if (client == NULL) {
  93         /* when nothing will be focused, send focus to the backup target */
  94         XSetInputFocus(ob_display, focus_backup, RevertToPointerRoot,
  95                        event_lasttime);
  96         XSync(ob_display, FALSE);
  97     }
  98
  99     /* in the middle of cycling..? kill it. */
 100     if (focus_cycle_target)
 101         focus_cycle(TRUE, TRUE, TRUE, TRUE);
 102
 103     old = focus_client;
 104     focus_client = client;
 105
 106     /* move to the top of the list */
 107     if (client != NULL)
 108         push_to_top(client);
 109
 110     /* set the NET_ACTIVE_WINDOW hint, but preserve it on shutdown */
 111     if (ob_state != State_Exiting) {
 112         active = client ? client->window : None;
 113         PROP_SET32(ob_root, net_active_window, window, active);
 114     }
 115
 116     if (focus_client != NULL)
 117         dispatch_client(Event_Client_Focus, focus_client, 0, 0);
 118     if (old != NULL)
 119         dispatch_client(Event_Client_Unfocus, old, 0, 0);
 120 }
 121
 122 static gboolean focus_under_pointer()
 123 {
 124     int x, y;
 125     GList *it;
 126
 127     if (ob_pointer_pos(&x, &y)) {
 128         for (it = stacking_list; it != NULL; it = it->next) {
 129             if (WINDOW_IS_CLIENT(it->data)) {
 130                 Client *c = WINDOW_AS_CLIENT(it->data);
 131                 if (c->desktop == screen_desktop &&
 132                     RECT_CONTAINS(c->frame->area, x, y))
 133                     break;
 134             }
 135         }
 136         if (it != NULL) {
 137             g_assert(WINDOW_IS_CLIENT(it->data));
 138             return client_normal(it->data) && client_focus(it->data);
 139         }
 140     }
 141     return FALSE;
 142 }
 143
 144 /* finds the first transient that isn't 'skip' and ensure's that client_normal
 145  is true for it */
 146 static Client *find_transient_recursive(Client *c, Client *top, Client *skip)
 147 {
 148     GSList *it;
 149     Client *ret;
 150
 151     for (it = c->transients; it; it = it->next) {
 152         if (it->data == top) return NULL;
 153         ret = find_transient_recursive(it->data, top, skip);
 154         if (ret && ret != skip && client_normal(ret)) return ret;
 155         if (it->data != skip && client_normal(it->data)) return it->data;
 156     }
 157     return NULL;
 158 }
 159
 160 static gboolean focus_fallback_transient(Client *top, Client *old)
 161 {
 162     Client *target = find_transient_recursive(top, top, old);
 163     if (!target) {
 164         /* make sure client_normal is true always */
 165         if (!client_normal(top))
 166             return FALSE;
 167         target = top; /* no transient, keep the top */
 168     }
 169     return client_focus(target);
 170 }
 171
 172 void focus_fallback(FallbackType type)
 173 {
 174     GList *it;
 175     Client *old = NULL;
 176
 177     old = focus_client;
 178
 179     /* unfocus any focused clients.. they can be focused by Pointer events
 180        and such, and then when I try focus them, I won't get a FocusIn event
 181        at all for them.
 182     */
 183     focus_set_client(NULL);
 184
 185     if (!(type == Fallback_Desktop ?
 186           config_focus_last_on_desktop : config_focus_last)) {
 187         if (config_focus_follow) focus_under_pointer();
 188         return;
 189     }
 190
 191     if (type == Fallback_Unfocusing && old) {
 192         /* try for transient relations */
 193         if (old->transient_for) {
 194             if (old->transient_for == TRAN_GROUP) {
 195                 for (it = focus_order[screen_desktop]; it; it = it->next) {
 196                     GSList *sit;
 197
 198                     for (sit = old->group->members; sit; sit = sit->next)
 199                         if (sit->data == it->data)
 200                             if (focus_fallback_transient(sit->data, old))
 201                                 return;
 202                 }
 203             } else {
 204                 if (focus_fallback_transient(old->transient_for, old))
 205                     return;
 206             }
 207         }
 208
 209         /* try for group relations */
 210         if (old->group) {
 211             GSList *sit;
 212
 213             for (it = focus_order[screen_desktop]; it != NULL; it = it->next)
 214                 for (sit = old->group->members; sit; sit = sit->next)
 215                     if (sit->data == it->data)
 216                         if (sit->data != old && client_normal(sit->data))
 217                             if (client_can_focus(sit->data)) {
 218                                 gboolean r = client_focus(sit->data);
 219                                 assert(r);
 220                                 return;
 221                             }
 222         }
 223     }
 224
 225     for (it = focus_order[screen_desktop]; it != NULL; it = it->next)
 226         if (type != Fallback_Unfocusing || it->data != old)
 227             if (client_normal(it->data) &&
 228                 /* dont fall back to 'anonymous' fullscreen windows. theres no
 229                    checks for this is in transient/group fallbacks, so they can
 230                    be fallback targets there. */
 231                 !((Client*)it->data)->fullscreen &&
 232                 client_can_focus(it->data)) {
 233                 gboolean r = client_focus(sit->data);
 234                 assert(r);
 235                 return;
 236             }
 237
 238     /* nothing to focus */
 239     focus_set_client(NULL);
 240 }
 241
 242 static void popup_cycle(Client *c, gboolean show)
 243 {
 244     if (!show) {
 245         popup_hide(focus_cycle_popup);
 246     } else {
 247         Rect *a;
 248
 249         a = screen_area(c->desktop);
 250         popup_position(focus_cycle_popup, CenterGravity,
 251                        a->x + a->width / 2, a->y + a->height / 2);
 252 /*        popup_size(focus_cycle_popup, a->height/2, a->height/16);
 253         popup_show(focus_cycle_popup, c->title,
 254                    client_icon(c, a->height/16, a->height/16));
 255 */
 256         /* XXX the size and the font extents need to be related on some level
 257          */
 258         popup_size(focus_cycle_popup, 320, 48);
 259
 260         /* use the transient's parent's title/icon */
 261         while (c->transient_for && c->transient_for != TRAN_GROUP)
 262             c = c->transient_for;
 263
 264         popup_show(focus_cycle_popup, (c->iconic ? c->icon_title : c->title),
 265                    client_icon(c, 48, 48));
 266     }
 267 }
 268
 269 Client *focus_cycle(gboolean forward, gboolean linear, gboolean done,
 270                     gboolean cancel)
 271 {
 272     static Client *first = NULL;
 273     static Client *t = NULL;
 274     static GList *order = NULL;
 275     GList *it, *start, *list;
 276     Client *ft;
 277
 278     if (cancel) {
 279         if (focus_cycle_target)
 280             frame_adjust_focus(focus_cycle_target->frame, FALSE);
 281         if (focus_client)
 282             frame_adjust_focus(focus_client->frame, TRUE);
 283         goto done_cycle;
 284     } else if (done) {
 285         if (focus_cycle_target)
 286             client_activate(focus_cycle_target);
 287         goto done_cycle;
 288     }
 289     if (!first)
 290         grab_pointer(TRUE, None);
 291
 292     if (!first) first = focus_client;
 293     if (!focus_cycle_target) focus_cycle_target = focus_client;
 294
 295     if (linear) list = client_list;
 296     else        list = focus_order[screen_desktop];
 297
 298     start = it = g_list_find(list, focus_cycle_target);
 299     if (!start) /* switched desktops or something? */
 300         start = it = forward ? g_list_last(list) : g_list_first(list);
 301     if (!start) goto done_cycle;
 302
 303     do {
 304         if (forward) {
 305             it = it->next;
 306             if (it == NULL) it = g_list_first(list);
 307         } else {
 308             it = it->prev;
 309             if (it == NULL) it = g_list_last(list);
 310         }
 311         /*ft = client_focus_target(it->data);*/
 312         ft = it->data;
 313         if (ft->transients == NULL && /*ft == it->data &&*/client_normal(ft) &&
 314             (ft->can_focus || ft->focus_notify) &&
 315             (ft->desktop == screen_desktop || ft->desktop == DESKTOP_ALL)) {
 316             if (ft != focus_cycle_target) { /* prevents flicker */
 317                 if (focus_cycle_target)
 318                     frame_adjust_focus(focus_cycle_target->frame, FALSE);
 319                 focus_cycle_target = ft;
 320                 frame_adjust_focus(focus_cycle_target->frame, TRUE);
 321             }
 322             popup_cycle(ft, config_focus_popup);
 323             return ft;
 324         }
 325     } while (it != start);
 326
 327 done_cycle:
 328     t = NULL;
 329     first = NULL;
 330     focus_cycle_target = NULL;
 331     g_list_free(order);
 332     order = NULL;
 333
 334     popup_cycle(ft, FALSE);
 335     grab_pointer(FALSE, None);
 336
 337     return NULL;
 338 }
 339
 340 void focus_order_add_new(Client *c)
 341 {
 342     guint d, i;
 343
 344     if (c->iconic)
 345         focus_order_to_top(c);
 346     else {
 347         d = c->desktop;
 348         if (d == DESKTOP_ALL) {
 349             for (i = 0; i < screen_num_desktops; ++i) {
 350                 if (focus_order[i] && ((Client*)focus_order[i]->data)->iconic)
 351                     focus_order[i] = g_list_insert(focus_order[i], c, 0);
 352                 else
 353                     focus_order[i] = g_list_insert(focus_order[i], c, 1);
 354             }
 355         } else
 356              if (focus_order[d] && ((Client*)focus_order[d]->data)->iconic)
 357                 focus_order[d] = g_list_insert(focus_order[d], c, 0);
 358             else
 359                 focus_order[d] = g_list_insert(focus_order[d], c, 1);
 360     }
 361 }
 362
 363 void focus_order_remove(Client *c)
 364 {
 365     guint d, i;
 366
 367     d = c->desktop;
 368     if (d == DESKTOP_ALL) {
 369         for (i = 0; i < screen_num_desktops; ++i)
 370             focus_order[i] = g_list_remove(focus_order[i], c);
 371     } else
 372         focus_order[d] = g_list_remove(focus_order[d], c);
 373 }
 374
 375 static void to_top(Client *c, guint d)
 376 {
 377     focus_order[d] = g_list_remove(focus_order[d], c);
 378     if (!c->iconic) {
 379         focus_order[d] = g_list_prepend(focus_order[d], c);
 380     } else {
 381         GList *it;
 382
 383         /* insert before first iconic window */
 384         for (it = focus_order[d];
 385              it && !((Client*)it->data)->iconic; it = it->next);
 386         g_list_insert_before(focus_order[d], it, c);
 387     }
 388 }
 389
 390 void focus_order_to_top(Client *c)
 391 {
 392     guint d, i;
 393
 394     d = c->desktop;
 395     if (d == DESKTOP_ALL) {
 396         for (i = 0; i < screen_num_desktops; ++i)
 397             to_top(c, i);
 398     } else
 399         to_top(c, d);
 400 }
 401
 402 static void to_bottom(Client *c, guint d)
 403 {
 404     focus_order[d] = g_list_remove(focus_order[d], c);
 405     if (c->iconic) {
 406         focus_order[d] = g_list_append(focus_order[d], c);
 407     } else {
 408         GList *it;
 409
 410         /* insert before first iconic window */
 411         for (it = focus_order[d];
 412              it && !((Client*)it->data)->iconic; it = it->next);
 413         g_list_insert_before(focus_order[d], it, c);
 414     }
 415 }
 416
 417 void focus_order_to_bottom(Client *c)
 418 {
 419     guint d, i;
 420
 421     d = c->desktop;
 422     if (d == DESKTOP_ALL) {
 423         for (i = 0; i < screen_num_desktops; ++i)
 424             to_bottom(c, i);
 425     } else
 426         to_bottom(c, d);
 427 }