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(it->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         Client *p = c;
 249         char *title;
 250
 251         a = screen_area(c->desktop);
 252         popup_position(focus_cycle_popup, CenterGravity,
 253                        a->x + a->width / 2, a->y + a->height / 2);
 254 /*        popup_size(focus_cycle_popup, a->height/2, a->height/16);
 255         popup_show(focus_cycle_popup, c->title,
 256                    client_icon(c, a->height/16, a->height/16));
 257 */
 258         /* XXX the size and the font extents need to be related on some level
 259          */
 260         popup_size(focus_cycle_popup, 320, 48);
 261
 262         /* use the transient's parent's title/icon */
 263         while (p->transient_for && p->transient_for != TRAN_GROUP)
 264             p = p->transient_for;
 265
 266         if (p == c)
 267             title = NULL;
 268         else
 269             title = g_strconcat((p->iconic ? p->icon_title : p->title),
 270                                 " - ",
 271                                 (c->iconic ? c->icon_title : c->title),
 272                                 NULL);
 273
 274         popup_show(focus_cycle_popup,
 275                    (title ? title : (c->iconic ? c->icon_title : c->title)),
 276                    client_icon(p, 48, 48));
 277         g_free(title);
 278     }
 279 }
 280
 281 Client *focus_cycle(gboolean forward, gboolean linear, gboolean done,
 282                     gboolean cancel)
 283 {
 284     static Client *first = NULL;
 285     static Client *t = NULL;
 286     static GList *order = NULL;
 287     GList *it, *start, *list;
 288     Client *ft;
 289
 290     if (cancel) {
 291         if (focus_cycle_target)
 292             frame_adjust_focus(focus_cycle_target->frame, FALSE);
 293         if (focus_client)
 294             frame_adjust_focus(focus_client->frame, TRUE);
 295         goto done_cycle;
 296     } else if (done) {
 297         if (focus_cycle_target)
 298             client_activate(focus_cycle_target);
 299         goto done_cycle;
 300     }
 301     if (!first)
 302         grab_pointer(TRUE, None);
 303
 304     if (!first) first = focus_client;
 305     if (!focus_cycle_target) focus_cycle_target = focus_client;
 306
 307     if (linear) list = client_list;
 308     else        list = focus_order[screen_desktop];
 309
 310     start = it = g_list_find(list, focus_cycle_target);
 311     if (!start) /* switched desktops or something? */
 312         start = it = forward ? g_list_last(list) : g_list_first(list);
 313     if (!start) goto done_cycle;
 314
 315     do {
 316         if (forward) {
 317             it = it->next;
 318             if (it == NULL) it = g_list_first(list);
 319         } else {
 320             it = it->prev;
 321             if (it == NULL) it = g_list_last(list);
 322         }
 323         /*ft = client_focus_target(it->data);*/
 324         ft = it->data;
 325         if (ft->transients == NULL && client_normal(ft) &&
 326             client_can_focus(ft)) {
 327             if (ft != focus_cycle_target) { /* prevents flicker */
 328                 if (focus_cycle_target)
 329                     frame_adjust_focus(focus_cycle_target->frame, FALSE);
 330                 focus_cycle_target = ft;
 331                 frame_adjust_focus(focus_cycle_target->frame, TRUE);
 332             }
 333             popup_cycle(ft, config_focus_popup);
 334             return ft;
 335         }
 336     } while (it != start);
 337
 338 done_cycle:
 339     t = NULL;
 340     first = NULL;
 341     focus_cycle_target = NULL;
 342     g_list_free(order);
 343     order = NULL;
 344
 345     popup_cycle(ft, FALSE);
 346     grab_pointer(FALSE, None);
 347
 348     return NULL;
 349 }
 350
 351 void focus_order_add_new(Client *c)
 352 {
 353     guint d, i;
 354
 355     if (c->iconic)
 356         focus_order_to_top(c);
 357     else {
 358         d = c->desktop;
 359         if (d == DESKTOP_ALL) {
 360             for (i = 0; i < screen_num_desktops; ++i) {
 361                 if (focus_order[i] && ((Client*)focus_order[i]->data)->iconic)
 362                     focus_order[i] = g_list_insert(focus_order[i], c, 0);
 363                 else
 364                     focus_order[i] = g_list_insert(focus_order[i], c, 1);
 365             }
 366         } else
 367              if (focus_order[d] && ((Client*)focus_order[d]->data)->iconic)
 368                 focus_order[d] = g_list_insert(focus_order[d], c, 0);
 369             else
 370                 focus_order[d] = g_list_insert(focus_order[d], c, 1);
 371     }
 372 }
 373
 374 void focus_order_remove(Client *c)
 375 {
 376     guint d, i;
 377
 378     d = c->desktop;
 379     if (d == DESKTOP_ALL) {
 380         for (i = 0; i < screen_num_desktops; ++i)
 381             focus_order[i] = g_list_remove(focus_order[i], c);
 382     } else
 383         focus_order[d] = g_list_remove(focus_order[d], c);
 384 }
 385
 386 static void to_top(Client *c, guint d)
 387 {
 388     focus_order[d] = g_list_remove(focus_order[d], c);
 389     if (!c->iconic) {
 390         focus_order[d] = g_list_prepend(focus_order[d], c);
 391     } else {
 392         GList *it;
 393
 394         /* insert before first iconic window */
 395         for (it = focus_order[d];
 396              it && !((Client*)it->data)->iconic; it = it->next);
 397         g_list_insert_before(focus_order[d], it, c);
 398     }
 399 }
 400
 401 void focus_order_to_top(Client *c)
 402 {
 403     guint d, i;
 404
 405     d = c->desktop;
 406     if (d == DESKTOP_ALL) {
 407         for (i = 0; i < screen_num_desktops; ++i)
 408             to_top(c, i);
 409     } else
 410         to_top(c, d);
 411 }
 412
 413 static void to_bottom(Client *c, guint d)
 414 {
 415     focus_order[d] = g_list_remove(focus_order[d], c);
 416     if (c->iconic) {
 417         focus_order[d] = g_list_append(focus_order[d], c);
 418     } else {
 419         GList *it;
 420
 421         /* insert before first iconic window */
 422         for (it = focus_order[d];
 423              it && !((Client*)it->data)->iconic; it = it->next);
 424         g_list_insert_before(focus_order[d], it, c);
 425     }
 426 }
 427
 428 void focus_order_to_bottom(Client *c)
 429 {
 430     guint d, i;
 431
 432     d = c->desktop;
 433     if (d == DESKTOP_ALL) {
 434         for (i = 0; i < screen_num_desktops; ++i)
 435             to_bottom(c, i);
 436     } else
 437         to_bottom(c, d);
 438 }