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
  19 Client *focus_client = NULL;
  20 GList **focus_order = NULL; /* these lists are created when screen_startup
  21                                sets the number of desktops */
  22
  23 Window focus_backup = None;
  24
  25 static Client *focus_cycle_target = NULL;
  26 static Popup *focus_cycle_popup = NULL;
  27
  28 void focus_startup()
  29 {
  30     /* create the window which gets focus when no clients get it. Have to
  31        make it override-redirect so we don't try manage it, since it is
  32        mapped. */
  33     XSetWindowAttributes attrib;
  34
  35     focus_client = NULL;
  36     focus_cycle_popup = popup_new(TRUE);
  37
  38     attrib.override_redirect = TRUE;
  39     focus_backup = XCreateWindow(ob_display, ob_root,
  40                                  -100, -100, 1, 1, 0,
  41                                  CopyFromParent, InputOutput, CopyFromParent,
  42                                  CWOverrideRedirect, &attrib);
  43     XMapRaised(ob_display, focus_backup);
  44
  45     /* start with nothing focused */
  46     focus_set_client(NULL);
  47 }
  48
  49 void focus_shutdown()
  50 {
  51     guint i;
  52
  53     for (i = 0; i < screen_num_desktops; ++i)
  54         g_list_free(focus_order[i]);
  55     g_free(focus_order);
  56     focus_order = NULL;
  57
  58     popup_free(focus_cycle_popup);
  59     focus_cycle_popup = NULL;
  60
  61     XDestroyWindow(ob_display, focus_backup);
  62
  63     /* reset focus to root */
  64     XSetInputFocus(ob_display, PointerRoot, RevertToPointerRoot,
  65                    event_lasttime);
  66 }
  67
  68 static void push_to_top(Client *client)
  69 {
  70     guint desktop;
  71
  72     desktop = client->desktop;
  73     if (desktop == DESKTOP_ALL) desktop = screen_desktop;
  74     focus_order[desktop] = g_list_remove(focus_order[desktop], client);
  75     focus_order[desktop] = g_list_prepend(focus_order[desktop], client);
  76 }
  77
  78 void focus_set_client(Client *client)
  79 {
  80     Window active;
  81     Client *old;
  82
  83 #ifdef DEBUG_FOCUS
  84     g_message("focus_set_client 0x%lx", client ? client->window : 0);
  85 #endif
  86
  87     /* uninstall the old colormap, and install the new one */
  88     screen_install_colormap(focus_client, FALSE);
  89     screen_install_colormap(client, TRUE);
  90
  91     if (client == NULL) {
  92         /* when nothing will be focused, send focus to the backup target */
  93         XSetInputFocus(ob_display, focus_backup, RevertToPointerRoot,
  94                        event_lasttime);
  95         XSync(ob_display, FALSE);
  96     }
  97
  98     /* in the middle of cycling..? kill it. */
  99     if (focus_cycle_target)
 100         focus_cycle(TRUE, TRUE, TRUE, TRUE);
 101
 102     old = focus_client;
 103     focus_client = client;
 104
 105     /* move to the top of the list */
 106     if (client != NULL)
 107         push_to_top(client);
 108
 109     /* set the NET_ACTIVE_WINDOW hint, but preserve it on shutdown */
 110     if (ob_state != State_Exiting) {
 111         active = client ? client->window : None;
 112         PROP_SET32(ob_root, net_active_window, window, active);
 113     }
 114
 115     if (focus_client != NULL)
 116         dispatch_client(Event_Client_Focus, focus_client, 0, 0);
 117     if (old != NULL)
 118         dispatch_client(Event_Client_Unfocus, old, 0, 0);
 119 }
 120
 121 static gboolean focus_under_pointer()
 122 {
 123     int x, y;
 124     GList *it;
 125
 126     if (ob_pointer_pos(&x, &y)) {
 127         for (it = stacking_list; it != NULL; it = it->next) {
 128             if (WINDOW_IS_CLIENT(it->data)) {
 129                 Client *c = WINDOW_AS_CLIENT(it->data);
 130                 if (c->desktop == screen_desktop &&
 131                     RECT_CONTAINS(c->frame->area, x, y))
 132                     break;
 133             }
 134         }
 135         if (it != NULL) {
 136             g_assert(WINDOW_IS_CLIENT(it->data));
 137             return client_normal(it->data) && client_focus(it->data);
 138         }
 139     }
 140     return FALSE;
 141 }
 142
 143 /* finds the first transient that isn't 'skip' and ensure's that client_normal
 144  is true for it */
 145 static Client *find_transient_recursive(Client *c, Client *top, Client *skip)
 146 {
 147     GSList *it;
 148     Client *ret;
 149
 150     for (it = c->transients; it; it = it->next) {
 151         if (it->data == top) return NULL;
 152         ret = find_transient_recursive(it->data, top, skip);
 153         if (ret && ret != skip && client_normal(ret)) return ret;
 154         if (it->data != skip && client_normal(it->data)) return it->data;
 155     }
 156     return NULL;
 157 }
 158
 159 static gboolean focus_fallback_transient(Client *top, Client *old)
 160 {
 161     Client *target = find_transient_recursive(top, top, old);
 162     if (!target) {
 163         /* make sure client_normal is true always */
 164         if (!client_normal(top))
 165             return FALSE;
 166         target = top; /* no transient, keep the top */
 167     }
 168     return client_focus(target);
 169 }
 170
 171 void focus_fallback(FallbackType type)
 172 {
 173     GList *it;
 174     Client *old = NULL;
 175
 176     old = focus_client;
 177
 178     /* unfocus any focused clients.. they can be focused by Pointer events
 179        and such, and then when I try focus them, I won't get a FocusIn event
 180        at all for them.
 181     */
 182     focus_set_client(NULL);
 183
 184     if (!(type == Fallback_Desktop ?
 185           config_focus_last_on_desktop : config_focus_last)) {
 186         if (config_focus_follow) focus_under_pointer();
 187         return;
 188     }
 189
 190     if (type == Fallback_Unfocusing && old) {
 191         /* try for transient relations */
 192         if (old->transient_for) {
 193             if (old->transient_for == TRAN_GROUP) {
 194                 for (it = focus_order[screen_desktop]; it; it = it->next) {
 195                     GSList *sit;
 196
 197                     for (sit = old->group->members; sit; sit = sit->next)
 198                         if (sit->data == it->data)
 199                             if (focus_fallback_transient(sit->data, old))
 200                                 return;
 201                 }
 202             } else {
 203                 if (focus_fallback_transient(old->transient_for, old))
 204                     return;
 205             }
 206         }
 207
 208         /* try for group relations */
 209         if (old->group) {
 210             GSList *sit;
 211
 212             for (it = focus_order[screen_desktop]; it != NULL; it = it->next)
 213                 for (sit = old->group->members; sit; sit = sit->next)
 214                     if (sit->data == it->data)
 215                         if (sit->data != old && client_normal(sit->data))
 216                             if (client_focus(sit->data))
 217                                 return;
 218         }
 219     }
 220
 221     for (it = focus_order[screen_desktop]; it != NULL; it = it->next)
 222         if (type != Fallback_Unfocusing || it->data != old)
 223             if (client_normal(it->data) &&
 224                 /* dont fall back to 'anonymous' fullscreen windows. theres no
 225                    checks for this is in transient/group fallbacks, so they can
 226                    be fallback targets there. */
 227                 !((Client*)it->data)->fullscreen &&
 228                 client_focus(it->data))
 229                 return;
 230
 231     /* nothing to focus */
 232     focus_set_client(NULL);
 233 }
 234
 235 static void popup_cycle(Client *c, gboolean show)
 236 {
 237     if (!show) {
 238         popup_hide(focus_cycle_popup);
 239     } else {
 240         Rect *a;
 241
 242         a = screen_area(c->desktop);
 243         popup_position(focus_cycle_popup, CenterGravity,
 244                        a->x + a->width / 2, a->y + a->height / 2);
 245 /*        popup_size(focus_cycle_popup, a->height/2, a->height/16);
 246         popup_show(focus_cycle_popup, c->title,
 247                    client_icon(c, a->height/16, a->height/16));
 248 */
 249         /* XXX the size and the font extents need to be related on some level
 250          */
 251         popup_size(focus_cycle_popup, 320, 48);
 252
 253         /* use the transient's parent's title/icon */
 254         while (c->transient_for && c->transient_for != TRAN_GROUP)
 255             c = c->transient_for;
 256
 257         popup_show(focus_cycle_popup, (c->iconic ? c->icon_title : c->title),
 258                    client_icon(c, 48, 48));
 259     }
 260 }
 261
 262 Client *focus_cycle(gboolean forward, gboolean linear, gboolean done,
 263                     gboolean cancel)
 264 {
 265     static Client *first = NULL;
 266     static Client *t = NULL;
 267     static GList *order = NULL;
 268     GList *it, *start, *list;
 269     Client *ft;
 270
 271     if (cancel) {
 272         if (focus_cycle_target)
 273             frame_adjust_focus(focus_cycle_target->frame, FALSE);
 274         if (focus_client)
 275             frame_adjust_focus(focus_client->frame, TRUE);
 276         goto done_cycle;
 277     } else if (done) {
 278         if (focus_cycle_target)
 279             client_activate(focus_cycle_target);
 280         goto done_cycle;
 281     }
 282     if (!first)
 283         grab_pointer(TRUE, None);
 284
 285     if (!first) first = focus_client;
 286     if (!focus_cycle_target) focus_cycle_target = focus_client;
 287
 288     if (linear) list = client_list;
 289     else        list = focus_order[screen_desktop];
 290
 291     start = it = g_list_find(list, focus_cycle_target);
 292     if (!start) /* switched desktops or something? */
 293         start = it = forward ? g_list_last(list) : g_list_first(list);
 294     if (!start) goto done_cycle;
 295
 296     do {
 297         if (forward) {
 298             it = it->next;
 299             if (it == NULL) it = g_list_first(list);
 300         } else {
 301             it = it->prev;
 302             if (it == NULL) it = g_list_last(list);
 303         }
 304         /*ft = client_focus_target(it->data);*/
 305         ft = it->data;
 306         if (ft->transients == NULL && /*ft == it->data &&*/client_normal(ft) &&
 307             (ft->can_focus || ft->focus_notify) &&
 308             (ft->desktop == screen_desktop || ft->desktop == DESKTOP_ALL)) {
 309             if (ft != focus_cycle_target) { /* prevents flicker */
 310                 if (focus_cycle_target)
 311                     frame_adjust_focus(focus_cycle_target->frame, FALSE);
 312                 focus_cycle_target = ft;
 313                 frame_adjust_focus(focus_cycle_target->frame, TRUE);
 314             }
 315             popup_cycle(ft, config_focus_popup);
 316             return ft;
 317         }
 318     } while (it != start);
 319
 320 done_cycle:
 321     t = NULL;
 322     first = NULL;
 323     focus_cycle_target = NULL;
 324     g_list_free(order);
 325     order = NULL;
 326
 327     popup_cycle(ft, FALSE);
 328     grab_pointer(FALSE, None);
 329
 330     return NULL;
 331 }
 332
 333 void focus_order_add_new(Client *c)
 334 {
 335     guint d, i;
 336
 337     if (c->iconic)
 338         focus_order_to_top(c);
 339     else {
 340         d = c->desktop;
 341         if (d == DESKTOP_ALL) {
 342             for (i = 0; i < screen_num_desktops; ++i) {
 343                 if (focus_order[i] && ((Client*)focus_order[i]->data)->iconic)
 344                     focus_order[i] = g_list_insert(focus_order[i], c, 0);
 345                 else
 346                     focus_order[i] = g_list_insert(focus_order[i], c, 1);
 347             }
 348         } else
 349              if (focus_order[d] && ((Client*)focus_order[d]->data)->iconic)
 350                 focus_order[d] = g_list_insert(focus_order[d], c, 0);
 351             else
 352                 focus_order[d] = g_list_insert(focus_order[d], c, 1);
 353     }
 354 }
 355
 356 void focus_order_remove(Client *c)
 357 {
 358     guint d, i;
 359
 360     d = c->desktop;
 361     if (d == DESKTOP_ALL) {
 362         for (i = 0; i < screen_num_desktops; ++i)
 363             focus_order[i] = g_list_remove(focus_order[i], c);
 364     } else
 365         focus_order[d] = g_list_remove(focus_order[d], c);
 366 }
 367
 368 static void to_top(Client *c, guint d)
 369 {
 370     focus_order[d] = g_list_remove(focus_order[d], c);
 371     if (!c->iconic) {
 372         focus_order[d] = g_list_prepend(focus_order[d], c);
 373     } else {
 374         GList *it;
 375
 376         /* insert before first iconic window */
 377         for (it = focus_order[d];
 378              it && !((Client*)it->data)->iconic; it = it->next);
 379         g_list_insert_before(focus_order[d], it, c);
 380     }
 381 }
 382
 383 void focus_order_to_top(Client *c)
 384 {
 385     guint d, i;
 386
 387     d = c->desktop;
 388     if (d == DESKTOP_ALL) {
 389         for (i = 0; i < screen_num_desktops; ++i)
 390             to_top(c, i);
 391     } else
 392         to_top(c, d);
 393 }
 394
 395 static void to_bottom(Client *c, guint d)
 396 {
 397     focus_order[d] = g_list_remove(focus_order[d], c);
 398     if (c->iconic) {
 399         focus_order[d] = g_list_append(focus_order[d], c);
 400     } else {
 401         GList *it;
 402
 403         /* insert before first iconic window */
 404         for (it = focus_order[d];
 405              it && !((Client*)it->data)->iconic; it = it->next);
 406         g_list_insert_before(focus_order[d], it, c);
 407     }
 408 }
 409
 410 void focus_order_to_bottom(Client *c)
 411 {
 412     guint d, i;
 413
 414     d = c->desktop;
 415     if (d == DESKTOP_ALL) {
 416         for (i = 0; i < screen_num_desktops; ++i)
 417             to_bottom(c, i);
 418     } else
 419         to_bottom(c, d);
 420 }