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
  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
  27 void focus_startup()
  28 {
  29     /* create the window which gets focus when no clients get it. Have to
  30        make it override-redirect so we don't try manage it, since it is
  31        mapped. */
  32     XSetWindowAttributes attrib;
  33
  34     focus_client = NULL;
  35
  36     attrib.override_redirect = TRUE;
  37     focus_backup = XCreateWindow(ob_display, ob_root,
  38                                  -100, -100, 1, 1, 0,
  39                                  CopyFromParent, InputOutput, CopyFromParent,
  40                                  CWOverrideRedirect, &attrib);
  41     XMapWindow(ob_display, focus_backup);
  42     stacking_raise_internal(focus_backup);
  43
  44     /* start with nothing focused */
  45     focus_set_client(NULL);
  46 }
  47
  48 void focus_shutdown()
  49 {
  50     guint i;
  51
  52     for (i = 0; i < screen_num_desktops; ++i)
  53         g_list_free(focus_order[i]);
  54     g_free(focus_order);
  55     focus_order = NULL;
  56
  57     XDestroyWindow(ob_display, focus_backup);
  58
  59     /* reset focus to root */
  60     XSetInputFocus(ob_display, PointerRoot, RevertToPointerRoot,
  61                    event_lasttime);
  62 }
  63
  64 static void push_to_top(Client *client)
  65 {
  66     guint desktop;
  67
  68     desktop = client->desktop;
  69     if (desktop == DESKTOP_ALL) desktop = screen_desktop;
  70     focus_order[desktop] = g_list_remove(focus_order[desktop], client);
  71     focus_order[desktop] = g_list_prepend(focus_order[desktop], client);
  72 }
  73
  74 void focus_set_client(Client *client)
  75 {
  76     Window active;
  77     Client *old;
  78
  79     /* uninstall the old colormap, and install the new one */
  80     screen_install_colormap(focus_client, FALSE);
  81     screen_install_colormap(client, TRUE);
  82
  83     if (client == NULL) {
  84         /* when nothing will be focused, send focus to the backup target */
  85         XSetInputFocus(ob_display, focus_backup, RevertToPointerRoot,
  86                        event_lasttime);
  87         XSync(ob_display, FALSE);
  88     }
  89
  90     /* in the middle of cycling..? kill it. */
  91     if (focus_cycle_target)
  92         focus_cycle(TRUE, TRUE, TRUE, TRUE);
  93
  94     old = focus_client;
  95     focus_client = client;
  96
  97     /* move to the top of the list */
  98     if (client != NULL)
  99         push_to_top(client);
 100
 101     /* set the NET_ACTIVE_WINDOW hint */
 102     active = client ? client->window : None;
 103     PROP_SET32(ob_root, net_active_window, window, active);
 104
 105     if (focus_client != NULL)
 106         dispatch_client(Event_Client_Focus, focus_client, 0, 0);
 107     if (old != NULL)
 108         dispatch_client(Event_Client_Unfocus, old, 0, 0);
 109 }
 110
 111 static gboolean focus_under_pointer()
 112 {
 113     int x, y;
 114     GList *it;
 115
 116     if (ob_pointer_pos(&x, &y)) {
 117         for (it = stacking_list; it != NULL; it = it->next) {
 118             Client *c = it->data;
 119             if (c->desktop == screen_desktop &&
 120                 RECT_CONTAINS(c->frame->area, x, y))
 121                 break;
 122         }
 123         if (it != NULL)
 124             return client_normal(it->data) && client_focus(it->data);
 125     }
 126     return FALSE;
 127 }
 128
 129 /* finds the first transient that isn't 'skip' and ensure's that client_normal
 130  is true for it */
 131 static Client *find_transient_recursive(Client *c, Client *top, Client *skip)
 132 {
 133     GSList *it;
 134     Client *ret;
 135
 136     for (it = c->transients; it; it = it->next) {
 137         if (it->data == top) return NULL;
 138         ret = find_transient_recursive(it->data, top, skip);
 139         if (ret && ret != skip && client_normal(ret)) return ret;
 140         if (it->data != skip && client_normal(it->data)) return it->data;
 141     }
 142     return NULL;
 143 }
 144
 145 static gboolean focus_fallback_transient(Client *top, Client *old)
 146 {
 147     Client *target = find_transient_recursive(top, top, old);
 148     if (!target) {
 149         /* make sure client_normal is true always */
 150         if (!client_normal(top))
 151             return FALSE;
 152         target = top; /* no transient, keep the top */
 153     }
 154     return client_focus(target);
 155 }
 156
 157 void focus_fallback(FallbackType type)
 158 {
 159     GList *it;
 160     Client *old = NULL;
 161
 162     old = focus_client;
 163
 164     /* unfocus any focused clients.. they can be focused by Pointer events
 165        and such, and then when I try focus them, I won't get a FocusIn event
 166        at all for them.
 167     */
 168     focus_set_client(NULL);
 169
 170     if (!(type == Fallback_Desktop ?
 171           config_focus_last_on_desktop : config_focus_last)) {
 172         if (config_focus_follow) focus_under_pointer();
 173         return;
 174     }
 175
 176     if (type == Fallback_Unfocusing && old) {
 177         /* try for transient relations */
 178         if (old->transient_for) {
 179             if (old->transient_for == TRAN_GROUP) {
 180                 for (it = focus_order[screen_desktop]; it; it = it->next) {
 181                     GSList *sit;
 182
 183                     for (sit = old->group->members; sit; sit = sit->next)
 184                         if (sit->data == it->data)
 185                             if (focus_fallback_transient(sit->data, old))
 186                                 return;
 187                 }
 188             } else {
 189                 if (focus_fallback_transient(old->transient_for, old))
 190                     return;
 191             }
 192         }
 193
 194         /* try for group relations */
 195         if (old->group) {
 196             GSList *sit;
 197
 198             for (it = focus_order[screen_desktop]; it != NULL; it = it->next)
 199                 for (sit = old->group->members; sit; sit = sit->next)
 200                     if (sit->data == it->data)
 201                         if (sit->data != old && client_normal(sit->data))
 202                             if (client_focus(sit->data))
 203                                 return;
 204         }
 205     }
 206
 207     for (it = focus_order[screen_desktop]; it != NULL; it = it->next)
 208         if (type != Fallback_Unfocusing || it->data != old)
 209             if (client_normal(it->data) && client_focus(it->data))
 210                 return;
 211
 212     /* nothing to focus */
 213     focus_set_client(NULL);
 214 }
 215
 216 static void popup_cycle(Client *c, gboolean show)
 217 {
 218     XSetWindowAttributes attrib;
 219     static Window coords = None;
 220
 221     if (coords == None) {
 222         attrib.override_redirect = TRUE;
 223         coords = XCreateWindow(ob_display, ob_root,
 224                                0, 0, 1, 1, 0, render_depth, InputOutput,
 225                                render_visual, CWOverrideRedirect, &attrib);
 226         g_assert(coords != None);
 227
 228         grab_pointer(TRUE, None);
 229
 230         XMapWindow(ob_display, coords);
 231     }
 232
 233     if (!show) {
 234         XDestroyWindow(ob_display, coords);
 235         coords = None;
 236
 237         grab_pointer(FALSE, None);
 238     } else {
 239         Rect *a;
 240         Size s;
 241
 242         a = screen_area(c->desktop);
 243
 244         framerender_size_popup_label(c->title, &s);
 245         XMoveResizeWindow(ob_display, coords,
 246                           a->x + (a->width - s.width) / 2,
 247                           a->y + (a->height - s.height) / 2,
 248                           s.width, s.height);
 249         framerender_popup_label(coords, &s, c->title);
 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             if (focus_cycle_target->iconic)
 272                 client_iconify(focus_cycle_target, FALSE, FALSE);
 273             client_focus(focus_cycle_target);
 274             stacking_raise(focus_cycle_target);
 275         }
 276         goto done_cycle;
 277     }
 278     if (!first) first = focus_client;
 279     if (!focus_cycle_target) focus_cycle_target = focus_client;
 280
 281     if (linear) list = client_list;
 282     else        list = focus_order[screen_desktop];
 283
 284     start = it = g_list_find(list, focus_cycle_target);
 285     if (!start) /* switched desktops or something? */
 286         start = it = forward ? g_list_last(list) : g_list_first(list);
 287     if (!start) goto done_cycle;
 288
 289     do {
 290         if (forward) {
 291             it = it->next;
 292             if (it == NULL) it = g_list_first(list);
 293         } else {
 294             it = it->prev;
 295             if (it == NULL) it = g_list_last(list);
 296         }
 297         ft = client_focus_target(it->data);
 298         if (ft == it->data && client_normal(ft) &&
 299             (ft->can_focus || ft->focus_notify) &&
 300             (ft->desktop == screen_desktop || ft->desktop == DESKTOP_ALL)) {
 301             if (focus_cycle_target)
 302                 frame_adjust_focus(focus_cycle_target->frame, FALSE);
 303             focus_cycle_target = ft;
 304             frame_adjust_focus(focus_cycle_target->frame, TRUE);
 305             popup_cycle(ft, TRUE);
 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 }