openbox/focus.c

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