Dogcows Code - chaz/openbox/blob - 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 }