i3
con.c
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1 #undef I3__FILE__
2 #define I3__FILE__ "con.c"
3 /*
4  * vim:ts=4:sw=4:expandtab
5  *
6  * i3 - an improved dynamic tiling window manager
7  * © 2009-2011 Michael Stapelberg and contributors (see also: LICENSE)
8  *
9  * con.c: Functions which deal with containers directly (creating containers,
10  * searching containers, getting specific properties from containers,
11  * …).
12  *
13  */
14 #include "all.h"
15 
16 char *colors[] = {
17  "#ff0000",
18  "#00FF00",
19  "#0000FF",
20  "#ff00ff",
21  "#00ffff",
22  "#ffff00",
23  "#aa0000",
24  "#00aa00",
25  "#0000aa",
26  "#aa00aa"
27 };
28 
29 static void con_on_remove_child(Con *con);
30 
31 /*
32  * force parent split containers to be redrawn
33  *
34  */
36  Con *parent = con;
37 
38  while (parent && parent->type != CT_WORKSPACE && parent->type != CT_DOCKAREA) {
39  if (!con_is_leaf(parent))
40  FREE(parent->deco_render_params);
41  parent = parent->parent;
42  }
43 }
44 
45 /*
46  * Create a new container (and attach it to the given parent, if not NULL).
47  * This function only initializes the data structures.
48  *
49  */
50 Con *con_new_skeleton(Con *parent, i3Window *window) {
51  Con *new = scalloc(sizeof(Con));
52  new->on_remove_child = con_on_remove_child;
54  new->aspect_ratio = 0.0;
55  new->type = CT_CON;
56  new->window = window;
57  new->border_style = config.default_border;
58  new->current_border_width = -1;
59  if (window)
60  new->depth = window->depth;
61  else
62  new->depth = XCB_COPY_FROM_PARENT;
63  static int cnt = 0;
64  DLOG("opening window %d\n", cnt);
65 
66  /* TODO: remove window coloring after test-phase */
67  DLOG("color %s\n", colors[cnt]);
68  new->name = strdup(colors[cnt]);
69  //uint32_t cp = get_colorpixel(colors[cnt]);
70  cnt++;
71  if ((cnt % (sizeof(colors) / sizeof(char*))) == 0)
72  cnt = 0;
73 
74  TAILQ_INIT(&(new->floating_head));
75  TAILQ_INIT(&(new->nodes_head));
76  TAILQ_INIT(&(new->focus_head));
77  TAILQ_INIT(&(new->swallow_head));
78 
79  if (parent != NULL)
80  con_attach(new, parent, false);
81 
82  return new;
83 }
84 
85 /* A wrapper for con_new_skeleton, to retain the old con_new behaviour
86  *
87  */
88 Con *con_new(Con *parent, i3Window *window) {
89  Con *new = con_new_skeleton(parent, window);
90  x_con_init(new, new->depth);
91  return new;
92 }
93 
94 /*
95  * Attaches the given container to the given parent. This happens when moving
96  * a container or when inserting a new container at a specific place in the
97  * tree.
98  *
99  * ignore_focus is to just insert the Con at the end (useful when creating a
100  * new split container *around* some containers, that is, detaching and
101  * attaching them in order without wanting to mess with the focus in between).
102  *
103  */
104 void con_attach(Con *con, Con *parent, bool ignore_focus) {
105  con->parent = parent;
106  Con *loop;
107  Con *current = NULL;
108  struct nodes_head *nodes_head = &(parent->nodes_head);
109  struct focus_head *focus_head = &(parent->focus_head);
110 
111  /* Workspaces are handled differently: they need to be inserted at the
112  * right position. */
113  if (con->type == CT_WORKSPACE) {
114  DLOG("it's a workspace. num = %d\n", con->num);
115  if (con->num == -1 || TAILQ_EMPTY(nodes_head)) {
116  TAILQ_INSERT_TAIL(nodes_head, con, nodes);
117  } else {
118  current = TAILQ_FIRST(nodes_head);
119  if (con->num < current->num) {
120  /* we need to insert the container at the beginning */
121  TAILQ_INSERT_HEAD(nodes_head, con, nodes);
122  } else {
123  while (current->num != -1 && con->num > current->num) {
124  current = TAILQ_NEXT(current, nodes);
125  if (current == TAILQ_END(nodes_head)) {
126  current = NULL;
127  break;
128  }
129  }
130  /* we need to insert con after current, if current is not NULL */
131  if (current)
132  TAILQ_INSERT_BEFORE(current, con, nodes);
133  else TAILQ_INSERT_TAIL(nodes_head, con, nodes);
134  }
135  }
136  goto add_to_focus_head;
137  }
138 
139  if (con->type == CT_FLOATING_CON) {
140  DLOG("Inserting into floating containers\n");
141  TAILQ_INSERT_TAIL(&(parent->floating_head), con, floating_windows);
142  } else {
143  if (!ignore_focus) {
144  /* Get the first tiling container in focus stack */
145  TAILQ_FOREACH(loop, &(parent->focus_head), focused) {
146  if (loop->type == CT_FLOATING_CON)
147  continue;
148  current = loop;
149  break;
150  }
151  }
152 
153  /* When the container is not a split container (but contains a window)
154  * and is attached to a workspace, we check if the user configured a
155  * workspace_layout. This is done in workspace_attach_to, which will
156  * provide us with the container to which we should attach (either the
157  * workspace or a new split container with the configured
158  * workspace_layout).
159  */
160  if (con->window != NULL &&
161  parent->type == CT_WORKSPACE &&
162  parent->workspace_layout != L_DEFAULT) {
163  DLOG("Parent is a workspace. Applying default layout...\n");
164  Con *target = workspace_attach_to(parent);
165 
166  /* Attach the original con to this new split con instead */
167  nodes_head = &(target->nodes_head);
168  focus_head = &(target->focus_head);
169  con->parent = target;
170  current = NULL;
171 
172  DLOG("done\n");
173  }
174 
175  /* Insert the container after the tiling container, if found.
176  * When adding to a CT_OUTPUT, just append one after another. */
177  if (current && parent->type != CT_OUTPUT) {
178  DLOG("Inserting con = %p after last focused tiling con %p\n",
179  con, current);
180  TAILQ_INSERT_AFTER(nodes_head, current, con, nodes);
181  } else TAILQ_INSERT_TAIL(nodes_head, con, nodes);
182  }
183 
184 add_to_focus_head:
185  /* We insert to the TAIL because con_focus() will correct this.
186  * This way, we have the option to insert Cons without having
187  * to focus them. */
188  TAILQ_INSERT_TAIL(focus_head, con, focused);
190 }
191 
192 /*
193  * Detaches the given container from its current parent
194  *
195  */
196 void con_detach(Con *con) {
198  if (con->type == CT_FLOATING_CON) {
199  TAILQ_REMOVE(&(con->parent->floating_head), con, floating_windows);
200  TAILQ_REMOVE(&(con->parent->focus_head), con, focused);
201  } else {
202  TAILQ_REMOVE(&(con->parent->nodes_head), con, nodes);
203  TAILQ_REMOVE(&(con->parent->focus_head), con, focused);
204  }
205 }
206 
207 /*
208  * Sets input focus to the given container. Will be updated in X11 in the next
209  * run of x_push_changes().
210  *
211  */
212 void con_focus(Con *con) {
213  assert(con != NULL);
214  DLOG("con_focus = %p\n", con);
215 
216  /* 1: set focused-pointer to the new con */
217  /* 2: exchange the position of the container in focus stack of the parent all the way up */
218  TAILQ_REMOVE(&(con->parent->focus_head), con, focused);
219  TAILQ_INSERT_HEAD(&(con->parent->focus_head), con, focused);
220  if (con->parent->parent != NULL)
221  con_focus(con->parent);
222 
223  focused = con;
224  /* We can't blindly reset non-leaf containers since they might have
225  * other urgent children. Therefore we only reset leafs and propagate
226  * the changes upwards via con_update_parents_urgency() which does proper
227  * checks before resetting the urgency.
228  */
229  if (con->urgent && con_is_leaf(con)) {
230  con->urgent = false;
233  }
234 }
235 
236 /*
237  * Returns true when this node is a leaf node (has no children)
238  *
239  */
240 bool con_is_leaf(Con *con) {
241  return TAILQ_EMPTY(&(con->nodes_head));
242 }
243 
248 bool con_has_children(Con *con) {
249  return (!con_is_leaf(con) || !TAILQ_EMPTY(&(con->floating_head)));
250 }
251 
252 /*
253  * Returns true if a container should be considered split.
254  *
255  */
256 bool con_is_split(Con *con) {
257  if (con_is_leaf(con))
258  return false;
259 
260  switch (con->layout) {
261  case L_DOCKAREA:
262  case L_OUTPUT:
263  return false;
264 
265  default:
266  return true;
267  }
268 }
269 
270 /*
271  * Returns true if this node accepts a window (if the node swallows windows,
272  * it might already have swallowed enough and cannot hold any more).
273  *
274  */
276  /* 1: workspaces never accept direct windows */
277  if (con->type == CT_WORKSPACE)
278  return false;
279 
280  if (con_is_split(con)) {
281  DLOG("container %p does not accept windows, it is a split container.\n", con);
282  return false;
283  }
284 
285  /* TODO: if this is a swallowing container, we need to check its max_clients */
286  return (con->window == NULL);
287 }
288 
289 /*
290  * Gets the output container (first container with CT_OUTPUT in hierarchy) this
291  * node is on.
292  *
293  */
295  Con *result = con;
296  while (result != NULL && result->type != CT_OUTPUT)
297  result = result->parent;
298  /* We must be able to get an output because focus can never be set higher
299  * in the tree (root node cannot be focused). */
300  assert(result != NULL);
301  return result;
302 }
303 
304 /*
305  * Gets the workspace container this node is on.
306  *
307  */
309  Con *result = con;
310  while (result != NULL && result->type != CT_WORKSPACE)
311  result = result->parent;
312  return result;
313 }
314 
315 /*
316  * Searches parenst of the given 'con' until it reaches one with the specified
317  * 'orientation'. Aborts when it comes across a floating_con.
318  *
319  */
321  DLOG("Searching for parent of Con %p with orientation %d\n", con, orientation);
322  Con *parent = con->parent;
323  if (parent->type == CT_FLOATING_CON)
324  return NULL;
325  while (con_orientation(parent) != orientation) {
326  DLOG("Need to go one level further up\n");
327  parent = parent->parent;
328  /* Abort when we reach a floating con, or an output con */
329  if (parent &&
330  (parent->type == CT_FLOATING_CON ||
331  parent->type == CT_OUTPUT ||
332  (parent->parent && parent->parent->type == CT_OUTPUT)))
333  parent = NULL;
334  if (parent == NULL)
335  break;
336  }
337  DLOG("Result: %p\n", parent);
338  return parent;
339 }
340 
341 /*
342  * helper data structure for the breadth-first-search in
343  * con_get_fullscreen_con()
344  *
345  */
346 struct bfs_entry {
348 
349  TAILQ_ENTRY(bfs_entry) entries;
350 };
351 
352 /*
353  * Returns the first fullscreen node below this node.
354  *
355  */
356 Con *con_get_fullscreen_con(Con *con, int fullscreen_mode) {
357  Con *current, *child;
358 
359  /* TODO: is breadth-first-search really appropriate? (check as soon as
360  * fullscreen levels and fullscreen for containers is implemented) */
361  TAILQ_HEAD(bfs_head, bfs_entry) bfs_head = TAILQ_HEAD_INITIALIZER(bfs_head);
362  struct bfs_entry *entry = smalloc(sizeof(struct bfs_entry));
363  entry->con = con;
364  TAILQ_INSERT_TAIL(&bfs_head, entry, entries);
365 
366  while (!TAILQ_EMPTY(&bfs_head)) {
367  entry = TAILQ_FIRST(&bfs_head);
368  current = entry->con;
369  if (current != con && current->fullscreen_mode == fullscreen_mode) {
370  /* empty the queue */
371  while (!TAILQ_EMPTY(&bfs_head)) {
372  entry = TAILQ_FIRST(&bfs_head);
373  TAILQ_REMOVE(&bfs_head, entry, entries);
374  free(entry);
375  }
376  return current;
377  }
378 
379  TAILQ_REMOVE(&bfs_head, entry, entries);
380  free(entry);
381 
382  TAILQ_FOREACH(child, &(current->nodes_head), nodes) {
383  entry = smalloc(sizeof(struct bfs_entry));
384  entry->con = child;
385  TAILQ_INSERT_TAIL(&bfs_head, entry, entries);
386  }
387 
388  TAILQ_FOREACH(child, &(current->floating_head), floating_windows) {
389  entry = smalloc(sizeof(struct bfs_entry));
390  entry->con = child;
391  TAILQ_INSERT_TAIL(&bfs_head, entry, entries);
392  }
393  }
394 
395  return NULL;
396 }
397 
403  return (con->name[0] == '_' && con->name[1] == '_');
404 }
405 
406 /*
407  * Returns true if the node is floating.
408  *
409  */
411  assert(con != NULL);
412  DLOG("checking if con %p is floating\n", con);
413  return (con->floating >= FLOATING_AUTO_ON);
414 }
415 
416 /*
417  * Checks if the given container is either floating or inside some floating
418  * container. It returns the FLOATING_CON container.
419  *
420  */
422  assert(con != NULL);
423  if (con->type == CT_FLOATING_CON)
424  return con;
425 
426  if (con->floating >= FLOATING_AUTO_ON)
427  return con->parent;
428 
429  if (con->type == CT_WORKSPACE || con->type == CT_OUTPUT)
430  return NULL;
431 
432  return con_inside_floating(con->parent);
433 }
434 
435 /*
436  * Checks if the given container is inside a focused container.
437  *
438  */
440  if (con == focused)
441  return true;
442  if (!con->parent)
443  return false;
444  return con_inside_focused(con->parent);
445 }
446 
447 /*
448  * Returns the container with the given client window ID or NULL if no such
449  * container exists.
450  *
451  */
452 Con *con_by_window_id(xcb_window_t window) {
453  Con *con;
455  if (con->window != NULL && con->window->id == window)
456  return con;
457  return NULL;
458 }
459 
460 /*
461  * Returns the container with the given frame ID or NULL if no such container
462  * exists.
463  *
464  */
465 Con *con_by_frame_id(xcb_window_t frame) {
466  Con *con;
468  if (con->frame == frame)
469  return con;
470  return NULL;
471 }
472 
473 /*
474  * Returns the first container below 'con' which wants to swallow this window
475  * TODO: priority
476  *
477  */
478 Con *con_for_window(Con *con, i3Window *window, Match **store_match) {
479  Con *child;
480  Match *match;
481  //DLOG("searching con for window %p starting at con %p\n", window, con);
482  //DLOG("class == %s\n", window->class_class);
483 
484  TAILQ_FOREACH(child, &(con->nodes_head), nodes) {
485  TAILQ_FOREACH(match, &(child->swallow_head), matches) {
486  if (!match_matches_window(match, window))
487  continue;
488  if (store_match != NULL)
489  *store_match = match;
490  return child;
491  }
492  Con *result = con_for_window(child, window, store_match);
493  if (result != NULL)
494  return result;
495  }
496 
497  TAILQ_FOREACH(child, &(con->floating_head), floating_windows) {
498  TAILQ_FOREACH(match, &(child->swallow_head), matches) {
499  if (!match_matches_window(match, window))
500  continue;
501  if (store_match != NULL)
502  *store_match = match;
503  return child;
504  }
505  Con *result = con_for_window(child, window, store_match);
506  if (result != NULL)
507  return result;
508  }
509 
510  return NULL;
511 }
512 
513 /*
514  * Returns the number of children of this container.
515  *
516  */
518  Con *child;
519  int children = 0;
520 
521  TAILQ_FOREACH(child, &(con->nodes_head), nodes)
522  children++;
523 
524  return children;
525 }
526 
527 /*
528  * Updates the percent attribute of the children of the given container. This
529  * function needs to be called when a window is added or removed from a
530  * container.
531  *
532  */
534  Con *child;
535  int children = con_num_children(con);
536 
537  // calculate how much we have distributed and how many containers
538  // with a percentage set we have
539  double total = 0.0;
540  int children_with_percent = 0;
541  TAILQ_FOREACH(child, &(con->nodes_head), nodes) {
542  if (child->percent > 0.0) {
543  total += child->percent;
544  ++children_with_percent;
545  }
546  }
547 
548  // if there were children without a percentage set, set to a value that
549  // will make those children proportional to all others
550  if (children_with_percent != children) {
551  TAILQ_FOREACH(child, &(con->nodes_head), nodes) {
552  if (child->percent <= 0.0) {
553  if (children_with_percent == 0)
554  total += (child->percent = 1.0);
555  else total += (child->percent = total / children_with_percent);
556  }
557  }
558  }
559 
560  // if we got a zero, just distribute the space equally, otherwise
561  // distribute according to the proportions we got
562  if (total == 0.0) {
563  TAILQ_FOREACH(child, &(con->nodes_head), nodes)
564  child->percent = 1.0 / children;
565  } else if (total != 1.0) {
566  TAILQ_FOREACH(child, &(con->nodes_head), nodes)
567  child->percent /= total;
568  }
569 }
570 
571 /*
572  * Toggles fullscreen mode for the given container. Fullscreen mode will not be
573  * entered when there already is a fullscreen container on this workspace.
574  *
575  */
576 void con_toggle_fullscreen(Con *con, int fullscreen_mode) {
577  Con *workspace, *fullscreen;
578 
579  if (con->type == CT_WORKSPACE) {
580  DLOG("You cannot make a workspace fullscreen.\n");
581  return;
582  }
583 
584  DLOG("toggling fullscreen for %p / %s\n", con, con->name);
585  if (con->fullscreen_mode == CF_NONE) {
586  /* 1: check if there already is a fullscreen con */
587  if (fullscreen_mode == CF_GLOBAL)
588  fullscreen = con_get_fullscreen_con(croot, CF_GLOBAL);
589  else {
590  workspace = con_get_workspace(con);
591  fullscreen = con_get_fullscreen_con(workspace, CF_OUTPUT);
592  }
593  if (fullscreen != NULL) {
594  /* Disable fullscreen for the currently fullscreened
595  * container and enable it for the one the user wants
596  * to have in fullscreen mode. */
597  LOG("Disabling fullscreen for (%p/%s) upon user request\n",
598  fullscreen, fullscreen->name);
599  fullscreen->fullscreen_mode = CF_NONE;
600  }
601 
602  /* 2: enable fullscreen */
603  con->fullscreen_mode = fullscreen_mode;
604  } else {
605  /* 1: disable fullscreen */
606  con->fullscreen_mode = CF_NONE;
607  }
608 
609  DLOG("mode now: %d\n", con->fullscreen_mode);
610 
611  /* update _NET_WM_STATE if this container has a window */
612  /* TODO: when a window is assigned to a container which is already
613  * fullscreened, this state needs to be pushed to the client, too */
614  if (con->window == NULL)
615  return;
616 
617  uint32_t values[1];
618  unsigned int num = 0;
619 
620  if (con->fullscreen_mode != CF_NONE)
621  values[num++] = A__NET_WM_STATE_FULLSCREEN;
622 
623  xcb_change_property(conn, XCB_PROP_MODE_REPLACE, con->window->id,
624  A__NET_WM_STATE, XCB_ATOM_ATOM, 32, num, values);
625 }
626 
627 /*
628  * Moves the given container to the currently focused container on the given
629  * workspace.
630  *
631  * The fix_coordinates flag will translate the current coordinates (offset from
632  * the monitor position basically) to appropriate coordinates on the
633  * destination workspace.
634  * Not enabling this behaviour comes in handy when this function gets called by
635  * floating_maybe_reassign_ws, which will only "move" a floating window when it
636  * *already* changed its coordinates to a different output.
637  *
638  * The dont_warp flag disables pointer warping and will be set when this
639  * function is called while dragging a floating window.
640  *
641  * TODO: is there a better place for this function?
642  *
643  */
644 void con_move_to_workspace(Con *con, Con *workspace, bool fix_coordinates, bool dont_warp) {
645  /* Prevent moving if this would violate the fullscreen focus restrictions. */
646  if (!con_fullscreen_permits_focusing(workspace)) {
647  LOG("Cannot move out of a fullscreen container");
648  return;
649  }
650 
651  if (con_is_floating(con)) {
652  DLOG("Using FLOATINGCON instead\n");
653  con = con->parent;
654  }
655 
656  Con *source_ws = con_get_workspace(con);
657  if (workspace == source_ws) {
658  DLOG("Not moving, already there\n");
659  return;
660  }
661 
662  if (con->type == CT_WORKSPACE) {
663  /* Re-parent all of the old workspace's floating windows. */
664  Con *child;
665  while (!TAILQ_EMPTY(&(source_ws->floating_head))) {
666  child = TAILQ_FIRST(&(source_ws->floating_head));
667  con_move_to_workspace(child, workspace, true, true);
668  }
669 
670  /* If there are no non-floating children, ignore the workspace. */
671  if (con_is_leaf(con))
672  return;
673 
674  con = workspace_encapsulate(con);
675  if (con == NULL) {
676  ELOG("Workspace failed to move its contents into a container!\n");
677  return;
678  }
679  }
680 
681  /* Save the current workspace. So we can call workspace_show() by the end
682  * of this function. */
683  Con *current_ws = con_get_workspace(focused);
684 
685  Con *source_output = con_get_output(con),
686  *dest_output = con_get_output(workspace);
687 
688  /* 1: save the container which is going to be focused after the current
689  * container is moved away */
690  Con *focus_next = con_next_focused(con);
691 
692  /* 2: get the focused container of this workspace */
693  Con *next = con_descend_focused(workspace);
694 
695  /* 3: we go up one level, but only when next is a normal container */
696  if (next->type != CT_WORKSPACE) {
697  DLOG("next originally = %p / %s / type %d\n", next, next->name, next->type);
698  next = next->parent;
699  }
700 
701  /* 4: if the target container is floating, we get the workspace instead.
702  * Only tiling windows need to get inserted next to the current container.
703  * */
704  Con *floatingcon = con_inside_floating(next);
705  if (floatingcon != NULL) {
706  DLOG("floatingcon, going up even further\n");
707  next = floatingcon->parent;
708  }
709 
710  if (con->type == CT_FLOATING_CON) {
711  Con *ws = con_get_workspace(next);
712  DLOG("This is a floating window, using workspace %p / %s\n", ws, ws->name);
713  next = ws;
714  }
715 
716  if (source_output != dest_output) {
717  /* Take the relative coordinates of the current output, then add them
718  * to the coordinate space of the correct output */
719  if (fix_coordinates && con->type == CT_FLOATING_CON) {
720  floating_fix_coordinates(con, &(source_output->rect), &(dest_output->rect));
721  } else DLOG("Not fixing coordinates, fix_coordinates flag = %d\n", fix_coordinates);
722 
723  /* If moving to a visible workspace, call show so it can be considered
724  * focused. Must do before attaching because workspace_show checks to see
725  * if focused container is in its area. */
726  if (workspace_is_visible(workspace)) {
727  workspace_show(workspace);
728 
729  /* Don’t warp if told so (when dragging floating windows with the
730  * mouse for example) */
731  if (dont_warp)
732  x_set_warp_to(NULL);
733  else
734  x_set_warp_to(&(con->rect));
735  }
736  }
737 
738  /* If moving a fullscreen container and the destination already has a
739  * fullscreen window on it, un-fullscreen the target's fullscreen con. */
740  Con *fullscreen = con_get_fullscreen_con(workspace, CF_OUTPUT);
741  if (con->fullscreen_mode != CF_NONE && fullscreen != NULL) {
742  con_toggle_fullscreen(fullscreen, CF_OUTPUT);
743  fullscreen = NULL;
744  }
745 
746  DLOG("Re-attaching container to %p / %s\n", next, next->name);
747  /* 5: re-attach the con to the parent of this focused container */
748  Con *parent = con->parent;
749  con_detach(con);
750  con_attach(con, next, false);
751 
752  /* 6: fix the percentages */
753  con_fix_percent(parent);
754  con->percent = 0.0;
755  con_fix_percent(next);
756 
757  /* 7: focus the con on the target workspace, but only within that
758  * workspace, that is, don’t move focus away if the target workspace is
759  * invisible.
760  * We don’t focus the con for i3 pseudo workspaces like __i3_scratch and
761  * we don’t focus when there is a fullscreen con on that workspace. */
762  if (!con_is_internal(workspace) && !fullscreen) {
763  /* We need to save the focused workspace on the output in case the
764  * new workspace is hidden and it's necessary to immediately switch
765  * back to the originally-focused workspace. */
766  Con *old_focus = TAILQ_FIRST(&(output_get_content(dest_output)->focus_head));
768 
769  /* Restore focus if the output's focused workspace has changed. */
770  if (con_get_workspace(focused) != old_focus)
771  con_focus(old_focus);
772  }
773 
774  /* 8: when moving to another workspace, we leave the focus on the current
775  * workspace. (see also #809) */
776 
777  /* Descend focus stack in case focus_next is a workspace which can
778  * occur if we move to the same workspace. Also show current workspace
779  * to ensure it is focused. */
780  workspace_show(current_ws);
781 
782  /* Set focus only if con was on current workspace before moving.
783  * Otherwise we would give focus to some window on different workspace. */
784  if (source_ws == current_ws)
785  con_focus(con_descend_focused(focus_next));
786 
787  /* If anything within the container is associated with a startup sequence,
788  * delete it so child windows won't be created on the old workspace. */
789  struct Startup_Sequence *sequence;
790  xcb_get_property_cookie_t cookie;
791  xcb_get_property_reply_t *startup_id_reply;
792 
793  if (!con_is_leaf(con)) {
794  Con *child;
795  TAILQ_FOREACH(child, &(con->nodes_head), nodes) {
796  if (!child->window)
797  continue;
798 
799  cookie = xcb_get_property(conn, false, child->window->id,
800  A__NET_STARTUP_ID, XCB_GET_PROPERTY_TYPE_ANY, 0, 512);
801  startup_id_reply = xcb_get_property_reply(conn, cookie, NULL);
802 
803  sequence = startup_sequence_get(child->window, startup_id_reply, true);
804  if (sequence != NULL)
805  startup_sequence_delete(sequence);
806  }
807  }
808 
809  if (con->window) {
810  cookie = xcb_get_property(conn, false, con->window->id,
811  A__NET_STARTUP_ID, XCB_GET_PROPERTY_TYPE_ANY, 0, 512);
812  startup_id_reply = xcb_get_property_reply(conn, cookie, NULL);
813 
814  sequence = startup_sequence_get(con->window, startup_id_reply, true);
815  if (sequence != NULL)
816  startup_sequence_delete(sequence);
817  }
818 
819  CALL(parent, on_remove_child);
820 }
821 
822 /*
823  * Returns the orientation of the given container (for stacked containers,
824  * vertical orientation is used regardless of the actual orientation of the
825  * container).
826  *
827  */
829  switch (con->layout) {
830  case L_SPLITV:
831  /* stacking containers behave like they are in vertical orientation */
832  case L_STACKED:
833  return VERT;
834 
835  case L_SPLITH:
836  /* tabbed containers behave like they are in vertical orientation */
837  case L_TABBED:
838  return HORIZ;
839 
840  case L_DEFAULT:
841  DLOG("Someone called con_orientation() on a con with L_DEFAULT, this is a bug in the code.\n");
842  assert(false);
843  return HORIZ;
844 
845  case L_DOCKAREA:
846  case L_OUTPUT:
847  DLOG("con_orientation() called on dockarea/output (%d) container %p\n", con->layout, con);
848  assert(false);
849  return HORIZ;
850 
851  default:
852  DLOG("con_orientation() ran into default\n");
853  assert(false);
854  }
855 }
856 
857 /*
858  * Returns the container which will be focused next when the given container
859  * is not available anymore. Called in tree_close and con_move_to_workspace
860  * to properly restore focus.
861  *
862  */
864  Con *next;
865  /* floating containers are attached to a workspace, so we focus either the
866  * next floating container (if any) or the workspace itself. */
867  if (con->type == CT_FLOATING_CON) {
868  DLOG("selecting next for CT_FLOATING_CON\n");
869  next = TAILQ_NEXT(con, floating_windows);
870  DLOG("next = %p\n", next);
871  if (!next) {
872  next = TAILQ_PREV(con, floating_head, floating_windows);
873  DLOG("using prev, next = %p\n", next);
874  }
875  if (!next) {
876  Con *ws = con_get_workspace(con);
877  next = ws;
878  DLOG("no more floating containers for next = %p, restoring workspace focus\n", next);
879  while (next != TAILQ_END(&(ws->focus_head)) && !TAILQ_EMPTY(&(next->focus_head))) {
880  next = TAILQ_FIRST(&(next->focus_head));
881  if (next == con) {
882  DLOG("skipping container itself, we want the next client\n");
883  next = TAILQ_NEXT(next, focused);
884  }
885  }
886  if (next == TAILQ_END(&(ws->focus_head))) {
887  DLOG("Focus list empty, returning ws\n");
888  next = ws;
889  }
890  } else {
891  /* Instead of returning the next CT_FLOATING_CON, we descend it to
892  * get an actual window to focus. */
893  next = con_descend_focused(next);
894  }
895  return next;
896  }
897 
898  /* dock clients cannot be focused, so we focus the workspace instead */
899  if (con->parent->type == CT_DOCKAREA) {
900  DLOG("selecting workspace for dock client\n");
902  }
903 
904  /* if 'con' is not the first entry in the focus stack, use the first one as
905  * it’s currently focused already */
906  Con *first = TAILQ_FIRST(&(con->parent->focus_head));
907  if (first != con) {
908  DLOG("Using first entry %p\n", first);
909  next = first;
910  } else {
911  /* try to focus the next container on the same level as this one or fall
912  * back to its parent */
913  if (!(next = TAILQ_NEXT(con, focused)))
914  next = con->parent;
915  }
916 
917  /* now go down the focus stack as far as
918  * possible, excluding the current container */
919  while (!TAILQ_EMPTY(&(next->focus_head)) &&
920  TAILQ_FIRST(&(next->focus_head)) != con)
921  next = TAILQ_FIRST(&(next->focus_head));
922 
923  return next;
924 }
925 
926 /*
927  * Get the next/previous container in the specified orientation. This may
928  * travel up until it finds a container with suitable orientation.
929  *
930  */
931 Con *con_get_next(Con *con, char way, orientation_t orientation) {
932  DLOG("con_get_next(way=%c, orientation=%d)\n", way, orientation);
933  /* 1: get the first parent with the same orientation */
934  Con *cur = con;
935  while (con_orientation(cur->parent) != orientation) {
936  DLOG("need to go one level further up\n");
937  if (cur->parent->type == CT_WORKSPACE) {
938  LOG("that's a workspace, we can't go further up\n");
939  return NULL;
940  }
941  cur = cur->parent;
942  }
943 
944  /* 2: chose next (or previous) */
945  Con *next;
946  if (way == 'n') {
947  next = TAILQ_NEXT(cur, nodes);
948  /* if we are at the end of the list, we need to wrap */
949  if (next == TAILQ_END(&(parent->nodes_head)))
950  return NULL;
951  } else {
952  next = TAILQ_PREV(cur, nodes_head, nodes);
953  /* if we are at the end of the list, we need to wrap */
954  if (next == TAILQ_END(&(cur->nodes_head)))
955  return NULL;
956  }
957  DLOG("next = %p\n", next);
958 
959  return next;
960 }
961 
962 /*
963  * Returns the focused con inside this client, descending the tree as far as
964  * possible. This comes in handy when attaching a con to a workspace at the
965  * currently focused position, for example.
966  *
967  */
969  Con *next = con;
970  while (next != focused && !TAILQ_EMPTY(&(next->focus_head)))
971  next = TAILQ_FIRST(&(next->focus_head));
972  return next;
973 }
974 
975 /*
976  * Returns the focused con inside this client, descending the tree as far as
977  * possible. This comes in handy when attaching a con to a workspace at the
978  * currently focused position, for example.
979  *
980  * Works like con_descend_focused but considers only tiling cons.
981  *
982  */
984  Con *next = con;
985  Con *before;
986  Con *child;
987  if (next == focused)
988  return next;
989  do {
990  before = next;
991  TAILQ_FOREACH(child, &(next->focus_head), focused) {
992  if (child->type == CT_FLOATING_CON)
993  continue;
994 
995  next = child;
996  break;
997  }
998  } while (before != next && next != focused);
999  return next;
1000 }
1001 
1002 /*
1003  * Returns the leftmost, rightmost, etc. container in sub-tree. For example, if
1004  * direction is D_LEFT, then we return the rightmost container and if direction
1005  * is D_RIGHT, we return the leftmost container. This is because if we are
1006  * moving D_LEFT, and thus want the rightmost container.
1007  *
1008  */
1010  Con *most = NULL;
1011  Con *current;
1012  int orientation = con_orientation(con);
1013  DLOG("con_descend_direction(%p, orientation %d, direction %d)\n", con, orientation, direction);
1014  if (direction == D_LEFT || direction == D_RIGHT) {
1015  if (orientation == HORIZ) {
1016  /* If the direction is horizontal, we can use either the first
1017  * (D_RIGHT) or the last con (D_LEFT) */
1018  if (direction == D_RIGHT)
1019  most = TAILQ_FIRST(&(con->nodes_head));
1020  else most = TAILQ_LAST(&(con->nodes_head), nodes_head);
1021  } else if (orientation == VERT) {
1022  /* Wrong orientation. We use the last focused con. Within that con,
1023  * we recurse to chose the left/right con or at least the last
1024  * focused one. */
1025  TAILQ_FOREACH(current, &(con->focus_head), focused) {
1026  if (current->type != CT_FLOATING_CON) {
1027  most = current;
1028  break;
1029  }
1030  }
1031  } else {
1032  /* If the con has no orientation set, it’s not a split container
1033  * but a container with a client window, so stop recursing */
1034  return con;
1035  }
1036  }
1037 
1038  if (direction == D_UP || direction == D_DOWN) {
1039  if (orientation == VERT) {
1040  /* If the direction is vertical, we can use either the first
1041  * (D_DOWN) or the last con (D_UP) */
1042  if (direction == D_UP)
1043  most = TAILQ_LAST(&(con->nodes_head), nodes_head);
1044  else most = TAILQ_FIRST(&(con->nodes_head));
1045  } else if (orientation == HORIZ) {
1046  /* Wrong orientation. We use the last focused con. Within that con,
1047  * we recurse to chose the top/bottom con or at least the last
1048  * focused one. */
1049  TAILQ_FOREACH(current, &(con->focus_head), focused) {
1050  if (current->type != CT_FLOATING_CON) {
1051  most = current;
1052  break;
1053  }
1054  }
1055  } else {
1056  /* If the con has no orientation set, it’s not a split container
1057  * but a container with a client window, so stop recursing */
1058  return con;
1059  }
1060  }
1061 
1062  if (!most)
1063  return con;
1064  return con_descend_direction(most, direction);
1065 }
1066 
1067 /*
1068  * Returns a "relative" Rect which contains the amount of pixels that need to
1069  * be added to the original Rect to get the final position (obviously the
1070  * amount of pixels for normal, 1pixel and borderless are different).
1071  *
1072  */
1074  adjacent_t borders_to_hide = ADJ_NONE;
1075  int border_width = con->current_border_width;
1076  DLOG("The border width for con is set to: %d\n", con->current_border_width);
1077  Rect result;
1078  if (con->current_border_width < 0)
1079  border_width = config.default_border_width;
1080  DLOG("Effective border width is set to: %d\n", border_width);
1081  /* Shortcut to avoid calling con_adjacent_borders() on dock containers. */
1082  int border_style = con_border_style(con);
1083  if (border_style == BS_NONE)
1084  return (Rect){ 0, 0, 0, 0 };
1085  borders_to_hide = con_adjacent_borders(con) & config.hide_edge_borders;
1086  if (border_style == BS_NORMAL) {
1087  result = (Rect){border_width, 0 , -(2 * border_width), -(border_width)};
1088  } else {
1089  result = (Rect){border_width, border_width, -(2 * border_width), -(2 * border_width)};
1090  }
1091 
1092  /* Floating windows are never adjacent to any other window, so
1093  don’t hide their border(s). This prevents bug #998. */
1094  if (con_is_floating(con))
1095  return result;
1096 
1097  if (borders_to_hide & ADJ_LEFT_SCREEN_EDGE) {
1098  result.x -= border_width;
1099  result.width += border_width;
1100  }
1101  if (borders_to_hide & ADJ_RIGHT_SCREEN_EDGE) {
1102  result.width += border_width;
1103  }
1104  if (borders_to_hide & ADJ_UPPER_SCREEN_EDGE && (border_style != BS_NORMAL)) {
1105  result.y -= border_width;
1106  result.height += border_width;
1107  }
1108  if (borders_to_hide & ADJ_LOWER_SCREEN_EDGE) {
1109  result.height += border_width;
1110  }
1111  return result;
1112 
1113 }
1114 
1115 /*
1116  * Returns adjacent borders of the window. We need this if hide_edge_borders is
1117  * enabled.
1118  */
1120  adjacent_t result = ADJ_NONE;
1122  if (con->rect.x == workspace->rect.x)
1123  result |= ADJ_LEFT_SCREEN_EDGE;
1124  if (con->rect.x + con->rect.width == workspace->rect.x + workspace->rect.width)
1125  result |= ADJ_RIGHT_SCREEN_EDGE;
1126  if (con->rect.y == workspace->rect.y)
1127  result |= ADJ_UPPER_SCREEN_EDGE;
1128  if (con->rect.y + con->rect.height == workspace->rect.y + workspace->rect.height)
1129  result |= ADJ_LOWER_SCREEN_EDGE;
1130  return result;
1131 }
1132 
1133 /*
1134  * Use this function to get a container’s border style. This is important
1135  * because when inside a stack, the border style is always BS_NORMAL.
1136  * For tabbed mode, the same applies, with one exception: when the container is
1137  * borderless and the only element in the tabbed container, the border is not
1138  * rendered.
1139  *
1140  * For children of a CT_DOCKAREA, the border style is always none.
1141  *
1142  */
1144  Con *fs = con_get_fullscreen_con(con->parent, CF_OUTPUT);
1145  if (fs == con) {
1146  DLOG("this one is fullscreen! overriding BS_NONE\n");
1147  return BS_NONE;
1148  }
1149 
1150  if (con->parent->layout == L_STACKED)
1151  return (con_num_children(con->parent) == 1 ? con->border_style : BS_NORMAL);
1152 
1153  if (con->parent->layout == L_TABBED && con->border_style != BS_NORMAL)
1154  return (con_num_children(con->parent) == 1 ? con->border_style : BS_NORMAL);
1155 
1156  if (con->parent->type == CT_DOCKAREA)
1157  return BS_NONE;
1158 
1159  return con->border_style;
1160 }
1161 
1162 /*
1163  * Sets the given border style on con, correctly keeping the position/size of a
1164  * floating window.
1165  *
1166  */
1167 void con_set_border_style(Con *con, int border_style, int border_width) {
1168  /* Handle the simple case: non-floating containerns */
1169  if (!con_is_floating(con)) {
1170  con->border_style = border_style;
1171  con->current_border_width = border_width;
1172  return;
1173  }
1174 
1175  /* For floating containers, we want to keep the position/size of the
1176  * *window* itself. We first add the border pixels to con->rect to make
1177  * con->rect represent the absolute position of the window. Then, we change
1178  * the border and subtract the new border pixels. Afterwards, we update
1179  * parent->rect to contain con. */
1180  DLOG("This is a floating container\n");
1181 
1182  Rect bsr = con_border_style_rect(con);
1183  con->rect.x += bsr.x;
1184  con->rect.y += bsr.y;
1185  con->rect.width += bsr.width;
1186  con->rect.height += bsr.height;
1187 
1188  /* Change the border style, get new border/decoration values. */
1189  con->border_style = border_style;
1190  con->current_border_width = border_width;
1191  bsr = con_border_style_rect(con);
1192  int deco_height =
1193  (con->border_style == BS_NORMAL ? render_deco_height() : 0);
1194 
1195  con->rect.x -= bsr.x;
1196  con->rect.y -= bsr.y;
1197  con->rect.width -= bsr.width;
1198  con->rect.height -= bsr.height;
1199 
1200  Con *parent = con->parent;
1201  parent->rect.x = con->rect.x;
1202  parent->rect.y = con->rect.y - deco_height;
1203  parent->rect.width = con->rect.width;
1204  parent->rect.height = con->rect.height + deco_height;
1205 }
1206 
1207 /*
1208  * This function changes the layout of a given container. Use it to handle
1209  * special cases like changing a whole workspace to stacked/tabbed (creates a
1210  * new split container before).
1211  *
1212  */
1213 void con_set_layout(Con *con, layout_t layout) {
1214  DLOG("con_set_layout(%p, %d), con->type = %d\n",
1215  con, layout, con->type);
1216 
1217  /* Users can focus workspaces, but not any higher in the hierarchy.
1218  * Focus on the workspace is a special case, since in every other case, the
1219  * user means "change the layout of the parent split container". */
1220  if (con->type != CT_WORKSPACE)
1221  con = con->parent;
1222 
1223  /* We fill in last_split_layout when switching to a different layout
1224  * since there are many places in the code that don’t use
1225  * con_set_layout(). */
1226  if (con->layout == L_SPLITH || con->layout == L_SPLITV)
1227  con->last_split_layout = con->layout;
1228 
1229  /* When the container type is CT_WORKSPACE, the user wants to change the
1230  * whole workspace into stacked/tabbed mode. To do this and still allow
1231  * intuitive operations (like level-up and then opening a new window), we
1232  * need to create a new split container. */
1233  if (con->type == CT_WORKSPACE &&
1234  (layout == L_STACKED || layout == L_TABBED)) {
1235  if (con_num_children(con) == 0) {
1236  DLOG("Setting workspace_layout to %d\n", layout);
1237  con->workspace_layout = layout;
1238  } else {
1239  DLOG("Creating new split container\n");
1240  /* 1: create a new split container */
1241  Con *new = con_new(NULL, NULL);
1242  new->parent = con;
1243 
1244  /* 2: Set the requested layout on the split container and mark it as
1245  * split. */
1246  new->layout = layout;
1247  new->last_split_layout = con->last_split_layout;
1248 
1249  Con *old_focused = TAILQ_FIRST(&(con->focus_head));
1250  if (old_focused == TAILQ_END(&(con->focus_head)))
1251  old_focused = NULL;
1252 
1253  /* 3: move the existing cons of this workspace below the new con */
1254  DLOG("Moving cons\n");
1255  Con *child;
1256  while (!TAILQ_EMPTY(&(con->nodes_head))) {
1257  child = TAILQ_FIRST(&(con->nodes_head));
1258  con_detach(child);
1259  con_attach(child, new, true);
1260  }
1261 
1262  /* 4: attach the new split container to the workspace */
1263  DLOG("Attaching new split to ws\n");
1264  con_attach(new, con, false);
1265 
1266  if (old_focused)
1267  con_focus(old_focused);
1268 
1270  }
1272  return;
1273  }
1274 
1275  if (layout == L_DEFAULT) {
1276  /* Special case: the layout formerly known as "default" (in combination
1277  * with an orientation). Since we switched to splith/splitv layouts,
1278  * using the "default" layout (which "only" should happen when using
1279  * legacy configs) is using the last split layout (either splith or
1280  * splitv) in order to still do the same thing.
1281  *
1282  * Starting from v4.6 though, we will nag users about using "layout
1283  * default", and in v4.9 we will remove it entirely (with an
1284  * appropriate i3-migrate-config mechanism). */
1285  con->layout = con->last_split_layout;
1286  /* In case last_split_layout was not initialized… */
1287  if (con->layout == L_DEFAULT)
1288  con->layout = L_SPLITH;
1289  } else {
1290  con->layout = layout;
1291  }
1293 }
1294 
1295 /*
1296  * This function toggles the layout of a given container. toggle_mode can be
1297  * either 'default' (toggle only between stacked/tabbed/last_split_layout),
1298  * 'split' (toggle only between splitv/splith) or 'all' (toggle between all
1299  * layouts).
1300  *
1301  */
1302 void con_toggle_layout(Con *con, const char *toggle_mode) {
1303  Con *parent = con;
1304  /* Users can focus workspaces, but not any higher in the hierarchy.
1305  * Focus on the workspace is a special case, since in every other case, the
1306  * user means "change the layout of the parent split container". */
1307  if (con->type != CT_WORKSPACE)
1308  parent = con->parent;
1309  DLOG("con_toggle_layout(%p, %s), parent = %p\n", con, toggle_mode, parent);
1310 
1311  if (strcmp(toggle_mode, "split") == 0) {
1312  /* Toggle between splits. When the current layout is not a split
1313  * layout, we just switch back to last_split_layout. Otherwise, we
1314  * change to the opposite split layout. */
1315  if (parent->layout != L_SPLITH && parent->layout != L_SPLITV)
1316  con_set_layout(con, parent->last_split_layout);
1317  else {
1318  if (parent->layout == L_SPLITH)
1319  con_set_layout(con, L_SPLITV);
1320  else con_set_layout(con, L_SPLITH);
1321  }
1322  } else {
1323  if (parent->layout == L_STACKED)
1324  con_set_layout(con, L_TABBED);
1325  else if (parent->layout == L_TABBED) {
1326  if (strcmp(toggle_mode, "all") == 0)
1327  con_set_layout(con, L_SPLITH);
1328  else con_set_layout(con, parent->last_split_layout);
1329  } else if (parent->layout == L_SPLITH || parent->layout == L_SPLITV) {
1330  if (strcmp(toggle_mode, "all") == 0) {
1331  /* When toggling through all modes, we toggle between
1332  * splith/splitv, whereas normally we just directly jump to
1333  * stacked. */
1334  if (parent->layout == L_SPLITH)
1335  con_set_layout(con, L_SPLITV);
1336  else con_set_layout(con, L_STACKED);
1337  } else {
1338  con_set_layout(con, L_STACKED);
1339  }
1340  }
1341  }
1342 }
1343 
1344 /*
1345  * Callback which will be called when removing a child from the given con.
1346  * Kills the container if it is empty and replaces it with the child if there
1347  * is exactly one child.
1348  *
1349  */
1350 static void con_on_remove_child(Con *con) {
1351  DLOG("on_remove_child\n");
1352 
1353  /* Every container 'above' (in the hierarchy) the workspace content should
1354  * not be closed when the last child was removed */
1355  if (con->type == CT_OUTPUT ||
1356  con->type == CT_ROOT ||
1357  con->type == CT_DOCKAREA) {
1358  DLOG("not handling, type = %d\n", con->type);
1359  return;
1360  }
1361 
1362  /* For workspaces, close them only if they're not visible anymore */
1363  if (con->type == CT_WORKSPACE) {
1364  if (TAILQ_EMPTY(&(con->focus_head)) && !workspace_is_visible(con)) {
1365  LOG("Closing old workspace (%p / %s), it is empty\n", con, con->name);
1366  tree_close(con, DONT_KILL_WINDOW, false, false);
1367  ipc_send_event("workspace", I3_IPC_EVENT_WORKSPACE, "{\"change\":\"empty\"}");
1368  }
1369  return;
1370  }
1371 
1373  con->urgent = con_has_urgent_child(con);
1375 
1376  /* TODO: check if this container would swallow any other client and
1377  * don’t close it automatically. */
1378  int children = con_num_children(con);
1379  if (children == 0) {
1380  DLOG("Container empty, closing\n");
1381  tree_close(con, DONT_KILL_WINDOW, false, false);
1382  return;
1383  }
1384 }
1385 
1386 /*
1387  * Determines the minimum size of the given con by looking at its children (for
1388  * split/stacked/tabbed cons). Will be called when resizing floating cons
1389  *
1390  */
1392  DLOG("Determining minimum size for con %p\n", con);
1393 
1394  if (con_is_leaf(con)) {
1395  DLOG("leaf node, returning 75x50\n");
1396  return (Rect){ 0, 0, 75, 50 };
1397  }
1398 
1399  if (con->type == CT_FLOATING_CON) {
1400  DLOG("floating con\n");
1401  Con *child = TAILQ_FIRST(&(con->nodes_head));
1402  return con_minimum_size(child);
1403  }
1404 
1405  if (con->layout == L_STACKED || con->layout == L_TABBED) {
1406  uint32_t max_width = 0, max_height = 0, deco_height = 0;
1407  Con *child;
1408  TAILQ_FOREACH(child, &(con->nodes_head), nodes) {
1409  Rect min = con_minimum_size(child);
1410  deco_height += child->deco_rect.height;
1411  max_width = max(max_width, min.width);
1412  max_height = max(max_height, min.height);
1413  }
1414  DLOG("stacked/tabbed now, returning %d x %d + deco_rect = %d\n",
1415  max_width, max_height, deco_height);
1416  return (Rect){ 0, 0, max_width, max_height + deco_height };
1417  }
1418 
1419  /* For horizontal/vertical split containers we sum up the width (h-split)
1420  * or height (v-split) and use the maximum of the height (h-split) or width
1421  * (v-split) as minimum size. */
1422  if (con_is_split(con)) {
1423  uint32_t width = 0, height = 0;
1424  Con *child;
1425  TAILQ_FOREACH(child, &(con->nodes_head), nodes) {
1426  Rect min = con_minimum_size(child);
1427  if (con->layout == L_SPLITH) {
1428  width += min.width;
1429  height = max(height, min.height);
1430  } else {
1431  height += min.height;
1432  width = max(width, min.width);
1433  }
1434  }
1435  DLOG("split container, returning width = %d x height = %d\n", width, height);
1436  return (Rect){ 0, 0, width, height };
1437  }
1438 
1439  ELOG("Unhandled case, type = %d, layout = %d, split = %d\n",
1440  con->type, con->layout, con_is_split(con));
1441  assert(false);
1442 }
1443 
1444 /*
1445  * Returns true if changing the focus to con would be allowed considering
1446  * the fullscreen focus constraints. Specifically, if a fullscreen container or
1447  * any of its descendants is focused, this function returns true if and only if
1448  * focusing con would mean that focus would still be visible on screen, i.e.,
1449  * the newly focused container would not be obscured by a fullscreen container.
1450  *
1451  * In the simplest case, if a fullscreen container or any of its descendants is
1452  * fullscreen, this functions returns true if con is the fullscreen container
1453  * itself or any of its descendants, as this means focus wouldn't escape the
1454  * boundaries of the fullscreen container.
1455  *
1456  * In case the fullscreen container is of type CF_OUTPUT, this function returns
1457  * true if con is on a different workspace, as focus wouldn't be obscured by
1458  * the fullscreen container that is constrained to a different workspace.
1459  *
1460  * Note that this same logic can be applied to moving containers. If a
1461  * container can be focused under the fullscreen focus constraints, it can also
1462  * become a parent or sibling to the currently focused container.
1463  *
1464  */
1466  /* No focus, no problem. */
1467  if (!focused)
1468  return true;
1469 
1470  /* Find the first fullscreen ascendent. */
1471  Con *fs = focused;
1472  while (fs && fs->fullscreen_mode == CF_NONE)
1473  fs = fs->parent;
1474 
1475  /* fs must be non-NULL since the workspace con doesn’t have CF_NONE and
1476  * there always has to be a workspace con in the hierarchy. */
1477  assert(fs != NULL);
1478  /* The most common case is we hit the workspace level. In this
1479  * situation, changing focus is also harmless. */
1480  assert(fs->fullscreen_mode != CF_NONE);
1481  if (fs->type == CT_WORKSPACE)
1482  return true;
1483 
1484  /* Allow it if the container itself is the fullscreen container. */
1485  if (con == fs)
1486  return true;
1487 
1488  /* If fullscreen is per-output, the focus being in a different workspace is
1489  * sufficient to guarantee that change won't leave fullscreen in bad shape. */
1490  if (fs->fullscreen_mode == CF_OUTPUT &&
1491  con_get_workspace(con) != con_get_workspace(fs)) {
1492  return true;
1493  }
1494 
1495  /* Allow it only if the container to be focused is contained within the
1496  * current fullscreen container. */
1497  do {
1498  if (con->parent == fs)
1499  return true;
1500  con = con->parent;
1501  } while (con);
1502 
1503  /* Focusing con would hide it behind a fullscreen window, disallow it. */
1504  return false;
1505 }
1506 
1507 /*
1508  *
1509  * Checks if the given container has an urgent child.
1510  *
1511  */
1513  Con *child;
1514 
1515  if (con_is_leaf(con))
1516  return con->urgent;
1517 
1518  /* We are not interested in floating windows since they can only be
1519  * attached to a workspace → nodes_head instead of focus_head */
1520  TAILQ_FOREACH(child, &(con->nodes_head), nodes) {
1521  if (con_has_urgent_child(child))
1522  return true;
1523  }
1524 
1525  return false;
1526 }
1527 
1528 /*
1529  * Make all parent containers urgent if con is urgent or clear the urgent flag
1530  * of all parent containers if there are no more urgent children left.
1531  *
1532  */
1534  Con *parent = con->parent;
1535 
1536  bool new_urgency_value = con->urgent;
1537  while (parent && parent->type != CT_WORKSPACE && parent->type != CT_DOCKAREA) {
1538  if (new_urgency_value) {
1539  parent->urgent = true;
1540  } else {
1541  /* We can only reset the urgency when the parent
1542  * has no other urgent children */
1543  if (!con_has_urgent_child(parent))
1544  parent->urgent = false;
1545  }
1546  parent = parent->parent;
1547  }
1548 }
1549 
1550 /*
1551  * Set urgency flag to the container, all the parent containers and the workspace.
1552  *
1553  */
1554 void con_set_urgency(Con *con, bool urgent) {
1555  if (focused == con) {
1556  DLOG("Ignoring urgency flag for current client\n");
1557  con->window->urgent.tv_sec = 0;
1558  con->window->urgent.tv_usec = 0;
1559  return;
1560  }
1561 
1562  if (con->urgency_timer == NULL) {
1563  con->urgent = urgent;
1564  } else
1565  DLOG("Discarding urgency WM_HINT because timer is running\n");
1566 
1567  //CLIENT_LOG(con);
1568  if (con->window) {
1569  if (con->urgent) {
1570  gettimeofday(&con->window->urgent, NULL);
1571  } else {
1572  con->window->urgent.tv_sec = 0;
1573  con->window->urgent.tv_usec = 0;
1574  }
1575  }
1576 
1578 
1579  if (con->urgent == urgent)
1580  LOG("Urgency flag changed to %d\n", con->urgent);
1581 
1582  Con *ws;
1583  /* Set the urgency flag on the workspace, if a workspace could be found
1584  * (for dock clients, that is not the case). */
1585  if ((ws = con_get_workspace(con)) != NULL)
1587 }
1588 
1589 /*
1590  * Create a string representing the subtree under con.
1591  *
1592  */
1594  /* this code works as follows:
1595  * 1) create a string with the layout type (D/V/H/T/S) and an opening bracket
1596  * 2) append the tree representation of the children to the string
1597  * 3) add closing bracket
1598  *
1599  * The recursion ends when we hit a leaf, in which case we return the
1600  * class_instance of the contained window.
1601  */
1602 
1603  /* end of recursion */
1604  if (con_is_leaf(con)) {
1605  if (!con->window)
1606  return sstrdup("nowin");
1607 
1608  if (!con->window->class_instance)
1609  return sstrdup("noinstance");
1610 
1611  return sstrdup(con->window->class_instance);
1612  }
1613 
1614  char *buf;
1615  /* 1) add the Layout type to buf */
1616  if (con->layout == L_DEFAULT)
1617  buf = sstrdup("D[");
1618  else if (con->layout == L_SPLITV)
1619  buf = sstrdup("V[");
1620  else if (con->layout == L_SPLITH)
1621  buf = sstrdup("H[");
1622  else if (con->layout == L_TABBED)
1623  buf = sstrdup("T[");
1624  else if (con->layout == L_STACKED)
1625  buf = sstrdup("S[");
1626  else {
1627  ELOG("BUG: Code not updated to account for new layout type\n");
1628  assert(false);
1629  }
1630 
1631  /* 2) append representation of children */
1632  Con *child;
1633  TAILQ_FOREACH(child, &(con->nodes_head), nodes) {
1634  char *child_txt = con_get_tree_representation(child);
1635 
1636  char *tmp_buf;
1637  sasprintf(&tmp_buf, "%s%s%s", buf,
1638  (TAILQ_FIRST(&(con->nodes_head)) == child ? "" : " "), child_txt);
1639  free(buf);
1640  buf = tmp_buf;
1641  }
1642 
1643  /* 3) close the brackets */
1644  char *complete_buf;
1645  sasprintf(&complete_buf, "%s]", buf);
1646  free(buf);
1647 
1648  return complete_buf;
1649 }