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     XMapWindow(ob_display, focus_backup);
  44     stacking_raise_internal(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             Client *c = it->data;
 126             if (c->desktop == screen_desktop &&
 127                 RECT_CONTAINS(c->frame->area, x, y))
 128                 break;
 129         }
 130         if (it != NULL)
 131             return client_normal(it->data) && client_focus(it->data);
 132     }
 133     return FALSE;
 134 }
 135
 136 /* finds the first transient that isn't 'skip' and ensure's that client_normal
 137  is true for it */
 138 static Client *find_transient_recursive(Client *c, Client *top, Client *skip)
 139 {
 140     GSList *it;
 141     Client *ret;
 142
 143     for (it = c->transients; it; it = it->next) {
 144         if (it->data == top) return NULL;
 145         ret = find_transient_recursive(it->data, top, skip);
 146         if (ret && ret != skip && client_normal(ret)) return ret;
 147         if (it->data != skip && client_normal(it->data)) return it->data;
 148     }
 149     return NULL;
 150 }
 151
 152 static gboolean focus_fallback_transient(Client *top, Client *old)
 153 {
 154     Client *target = find_transient_recursive(top, top, old);
 155     if (!target) {
 156         /* make sure client_normal is true always */
 157         if (!client_normal(top))
 158             return FALSE;
 159         target = top; /* no transient, keep the top */
 160     }
 161     return client_focus(target);
 162 }
 163
 164 void focus_fallback(FallbackType type)
 165 {
 166     GList *it;
 167     Client *old = NULL;
 168
 169     old = focus_client;
 170
 171     /* unfocus any focused clients.. they can be focused by Pointer events
 172        and such, and then when I try focus them, I won't get a FocusIn event
 173        at all for them.
 174     */
 175     focus_set_client(NULL);
 176
 177     if (!(type == Fallback_Desktop ?
 178           config_focus_last_on_desktop : config_focus_last)) {
 179         if (config_focus_follow) focus_under_pointer();
 180         return;
 181     }
 182
 183     if (type == Fallback_Unfocusing && old) {
 184         /* try for transient relations */
 185         if (old->transient_for) {
 186             if (old->transient_for == TRAN_GROUP) {
 187                 for (it = focus_order[screen_desktop]; it; it = it->next) {
 188                     GSList *sit;
 189
 190                     for (sit = old->group->members; sit; sit = sit->next)
 191                         if (sit->data == it->data)
 192                             if (focus_fallback_transient(sit->data, old))
 193                                 return;
 194                 }
 195             } else {
 196                 if (focus_fallback_transient(old->transient_for, old))
 197                     return;
 198             }
 199         }
 200
 201         /* try for group relations */
 202         if (old->group) {
 203             GSList *sit;
 204
 205             for (it = focus_order[screen_desktop]; it != NULL; it = it->next)
 206                 for (sit = old->group->members; sit; sit = sit->next)
 207                     if (sit->data == it->data)
 208                         if (sit->data != old && client_normal(sit->data))
 209                             if (client_focus(sit->data))
 210                                 return;
 211         }
 212     }
 213
 214     for (it = focus_order[screen_desktop]; it != NULL; it = it->next)
 215         if (type != Fallback_Unfocusing || it->data != old)
 216             if (client_normal(it->data) &&
 217                 /* dont fall back to 'anonymous' fullscreen windows. theres no
 218                    checks for this is in transient/group fallbacks. */
 219                 !((Client*)it->data)->fullscreen &&
 220                 client_focus(it->data))
 221                 return;
 222
 223     /* nothing to focus */
 224     focus_set_client(NULL);
 225 }
 226
 227 static void popup_cycle(Client *c, gboolean show)
 228 {
 229     if (!show) {
 230         popup_hide(focus_cycle_popup);
 231     } else {
 232         Rect *a;
 233
 234         a = screen_area(c->desktop);
 235         popup_position(focus_cycle_popup, CenterGravity,
 236                        a->x + a->width / 2, a->y + a->height / 2);
 237 /*        popup_size(focus_cycle_popup, a->height/2, a->height/16);
 238         popup_show(focus_cycle_popup, c->title,
 239                    client_icon(c, a->height/16, a->height/16));
 240 */
 241         /* XXX the size and the font extents need to be related on some level
 242          */
 243         popup_size(focus_cycle_popup, 320, 48);
 244
 245         /* use the transient's parent's title/icon */
 246         while (c->transient_for && c->transient_for != TRAN_GROUP)
 247             c = c->transient_for;
 248
 249         popup_show(focus_cycle_popup, (c->iconic ? c->icon_title : c->title),
 250                    client_icon(c, 48, 48));
 251     }
 252 }
 253
 254 Client *focus_cycle(gboolean forward, gboolean linear, gboolean done,
 255                     gboolean cancel)
 256 {
 257     static Client *first = NULL;
 258     static Client *t = NULL;
 259     static GList *order = NULL;
 260     GList *it, *start, *list;
 261     Client *ft;
 262
 263     if (cancel) {
 264         /*if (first) client_focus(first); XXX*/
 265         if (focus_cycle_target)
 266             frame_adjust_focus(focus_cycle_target->frame, FALSE);
 267         if (focus_client)
 268             frame_adjust_focus(focus_client->frame, TRUE);
 269         goto done_cycle;
 270     } else if (done) {
 271         if (focus_cycle_target)
 272             client_activate(focus_cycle_target);
 273         goto done_cycle;
 274     }
 275     if (!first) first = focus_client;
 276     if (!focus_cycle_target) focus_cycle_target = focus_client;
 277
 278     if (linear) list = client_list;
 279     else        list = focus_order[screen_desktop];
 280
 281     start = it = g_list_find(list, focus_cycle_target);
 282     if (!start) /* switched desktops or something? */
 283         start = it = forward ? g_list_last(list) : g_list_first(list);
 284     if (!start) goto done_cycle;
 285
 286     do {
 287         if (forward) {
 288             it = it->next;
 289             if (it == NULL) it = g_list_first(list);
 290         } else {
 291             it = it->prev;
 292             if (it == NULL) it = g_list_last(list);
 293         }
 294         /*ft = client_focus_target(it->data);*/
 295         ft = it->data;
 296         if (ft->transients == NULL && /*ft == it->data &&*/client_normal(ft) &&
 297             (ft->can_focus || ft->focus_notify) &&
 298             (ft->desktop == screen_desktop || ft->desktop == DESKTOP_ALL)) {
 299             if (ft != focus_cycle_target) { /* prevents flicker */
 300                 if (focus_cycle_target)
 301                     frame_adjust_focus(focus_cycle_target->frame, FALSE);
 302                 focus_cycle_target = ft;
 303                 frame_adjust_focus(focus_cycle_target->frame, TRUE);
 304             }
 305             popup_cycle(ft, config_focus_popup);
 306             return ft;
 307         }
 308     } while (it != start);
 309
 310 done_cycle:
 311     t = NULL;
 312     first = NULL;
 313     focus_cycle_target = NULL;
 314     g_list_free(order);
 315     order = NULL;
 316     popup_cycle(ft, FALSE);
 317     return NULL;
 318 }
 319
 320 void focus_order_add_new(Client *c)
 321 {
 322     guint d, i;
 323
 324     if (c->iconic)
 325         focus_order_to_top(c);
 326     else {
 327         d = c->desktop;
 328         if (d == DESKTOP_ALL) {
 329             for (i = 0; i < screen_num_desktops; ++i) {
 330                 if (focus_order[i] && ((Client*)focus_order[i]->data)->iconic)
 331                     focus_order[i] = g_list_insert(focus_order[i], c, 0);
 332                 else
 333                     focus_order[i] = g_list_insert(focus_order[i], c, 1);
 334             }
 335         } else
 336              if (focus_order[d] && ((Client*)focus_order[d]->data)->iconic)
 337                 focus_order[d] = g_list_insert(focus_order[d], c, 0);
 338             else
 339                 focus_order[d] = g_list_insert(focus_order[d], c, 1);
 340     }
 341 }
 342
 343 void focus_order_remove(Client *c)
 344 {
 345     guint d, i;
 346
 347     d = c->desktop;
 348     if (d == DESKTOP_ALL) {
 349         for (i = 0; i < screen_num_desktops; ++i)
 350             focus_order[i] = g_list_remove(focus_order[i], c);
 351     } else
 352         focus_order[d] = g_list_remove(focus_order[d], c);
 353 }
 354
 355 static void to_top(Client *c, guint d)
 356 {
 357     focus_order[d] = g_list_remove(focus_order[d], c);
 358     if (!c->iconic) {
 359         focus_order[d] = g_list_prepend(focus_order[d], c);
 360     } else {
 361         GList *it;
 362
 363         /* insert before first iconic window */
 364         for (it = focus_order[d];
 365              it && !((Client*)it->data)->iconic; it = it->next);
 366         g_list_insert_before(focus_order[d], it, c);
 367     }
 368 }
 369
 370 void focus_order_to_top(Client *c)
 371 {
 372     guint d, i;
 373
 374     d = c->desktop;
 375     if (d == DESKTOP_ALL) {
 376         for (i = 0; i < screen_num_desktops; ++i)
 377             to_top(c, i);
 378     } else
 379         to_top(c, d);
 380 }
 381
 382 static void to_bottom(Client *c, guint d)
 383 {
 384     focus_order[d] = g_list_remove(focus_order[d], c);
 385     if (c->iconic) {
 386         focus_order[d] = g_list_append(focus_order[d], c);
 387     } else {
 388         GList *it;
 389
 390         /* insert before first iconic window */
 391         for (it = focus_order[d];
 392              it && !((Client*)it->data)->iconic; it = it->next);
 393         g_list_insert_before(focus_order[d], it, c);
 394     }
 395 }
 396
 397 void focus_order_to_bottom(Client *c)
 398 {
 399     guint d, i;
 400
 401     d = c->desktop;
 402     if (d == DESKTOP_ALL) {
 403         for (i = 0; i < screen_num_desktops; ++i)
 404             to_bottom(c, i);
 405     } else
 406         to_bottom(c, d);
 407 }