2 * vim:ts=4:sw=4:expandtab
4 * i3 - an improved dynamic tiling window manager
5 * © 2009-2011 Michael Stapelberg and contributors (see also: LICENSE)
7 * con.c: Functions which deal with containers directly (creating containers,
8 * searching containers, getting specific properties from containers,
27 static void con_on_remove_child(Con *con);
30 * Create a new container (and attach it to the given parent, if not NULL).
31 * This function initializes the data structures and creates the appropriate
32 * X11 IDs using x_con_init().
35 Con *con_new(Con *parent, i3Window *window) {
36 Con *new = scalloc(sizeof(Con));
37 new->on_remove_child = con_on_remove_child;
38 TAILQ_INSERT_TAIL(&all_cons, new, all_cons);
41 new->border_style = config.default_border;
43 DLOG("opening window %d\n", cnt);
45 /* TODO: remove window coloring after test-phase */
46 DLOG("color %s\n", colors[cnt]);
47 new->name = strdup(colors[cnt]);
48 //uint32_t cp = get_colorpixel(colors[cnt]);
50 if ((cnt % (sizeof(colors) / sizeof(char*))) == 0)
53 x_con_init(new, window->depth);
55 x_con_init(new, XCB_COPY_FROM_PARENT);
57 TAILQ_INIT(&(new->floating_head));
58 TAILQ_INIT(&(new->nodes_head));
59 TAILQ_INIT(&(new->focus_head));
60 TAILQ_INIT(&(new->swallow_head));
63 con_attach(new, parent, false);
69 * Attaches the given container to the given parent. This happens when moving
70 * a container or when inserting a new container at a specific place in the
73 * ignore_focus is to just insert the Con at the end (useful when creating a
74 * new split container *around* some containers, that is, detaching and
75 * attaching them in order without wanting to mess with the focus in between).
78 void con_attach(Con *con, Con *parent, bool ignore_focus) {
82 struct nodes_head *nodes_head = &(parent->nodes_head);
83 struct focus_head *focus_head = &(parent->focus_head);
85 /* Workspaces are handled differently: they need to be inserted at the
87 if (con->type == CT_WORKSPACE) {
88 DLOG("it's a workspace. num = %d\n", con->num);
89 if (con->num == -1 || TAILQ_EMPTY(nodes_head)) {
90 TAILQ_INSERT_TAIL(nodes_head, con, nodes);
92 current = TAILQ_FIRST(nodes_head);
93 if (con->num < current->num) {
94 /* we need to insert the container at the beginning */
95 TAILQ_INSERT_HEAD(nodes_head, con, nodes);
97 while (current->num != -1 && con->num > current->num) {
98 current = TAILQ_NEXT(current, nodes);
99 if (current == TAILQ_END(nodes_head)) {
104 /* we need to insert con after current, if current is not NULL */
106 TAILQ_INSERT_BEFORE(current, con, nodes);
107 else TAILQ_INSERT_TAIL(nodes_head, con, nodes);
110 goto add_to_focus_head;
113 if (con->type == CT_FLOATING_CON) {
114 DLOG("Inserting into floating containers\n");
115 TAILQ_INSERT_TAIL(&(parent->floating_head), con, floating_windows);
118 /* Get the first tiling container in focus stack */
119 TAILQ_FOREACH(loop, &(parent->focus_head), focused) {
120 if (loop->type == CT_FLOATING_CON)
127 /* When the container is not a split container (but contains a window)
128 * and is attached to a workspace, we check if the user configured a
129 * workspace_layout. This is done in workspace_attach_to, which will
130 * provide us with the container to which we should attach (either the
131 * workspace or a new split container with the configured
134 if (con->window != NULL &&
135 parent->type == CT_WORKSPACE &&
136 config.default_layout != L_DEFAULT) {
137 DLOG("Parent is a workspace. Applying default layout...\n");
138 Con *target = workspace_attach_to(parent);
140 /* Attach the original con to this new split con instead */
141 nodes_head = &(target->nodes_head);
142 focus_head = &(target->focus_head);
143 con->parent = target;
149 /* Insert the container after the tiling container, if found.
150 * When adding to a CT_OUTPUT, just append one after another. */
151 if (current && parent->type != CT_OUTPUT) {
152 DLOG("Inserting con = %p after last focused tiling con %p\n",
154 TAILQ_INSERT_AFTER(nodes_head, current, con, nodes);
155 } else TAILQ_INSERT_TAIL(nodes_head, con, nodes);
159 /* We insert to the TAIL because con_focus() will correct this.
160 * This way, we have the option to insert Cons without having
162 TAILQ_INSERT_TAIL(focus_head, con, focused);
166 * Detaches the given container from its current parent
169 void con_detach(Con *con) {
170 if (con->type == CT_FLOATING_CON) {
171 TAILQ_REMOVE(&(con->parent->floating_head), con, floating_windows);
172 TAILQ_REMOVE(&(con->parent->focus_head), con, focused);
174 TAILQ_REMOVE(&(con->parent->nodes_head), con, nodes);
175 TAILQ_REMOVE(&(con->parent->focus_head), con, focused);
180 * Sets input focus to the given container. Will be updated in X11 in the next
181 * run of x_push_changes().
184 void con_focus(Con *con) {
186 DLOG("con_focus = %p\n", con);
188 /* 1: set focused-pointer to the new con */
189 /* 2: exchange the position of the container in focus stack of the parent all the way up */
190 TAILQ_REMOVE(&(con->parent->focus_head), con, focused);
191 TAILQ_INSERT_HEAD(&(con->parent->focus_head), con, focused);
192 if (con->parent->parent != NULL)
193 con_focus(con->parent);
198 workspace_update_urgent_flag(con_get_workspace(con));
203 * Returns true when this node is a leaf node (has no children)
206 bool con_is_leaf(Con *con) {
207 return TAILQ_EMPTY(&(con->nodes_head));
211 * Returns true if this node accepts a window (if the node swallows windows,
212 * it might already have swallowed enough and cannot hold any more).
215 bool con_accepts_window(Con *con) {
216 /* 1: workspaces never accept direct windows */
217 if (con->type == CT_WORKSPACE)
221 DLOG("container %p does not accept windows, it is a split container.\n", con);
225 /* TODO: if this is a swallowing container, we need to check its max_clients */
226 return (con->window == NULL);
230 * Gets the output container (first container with CT_OUTPUT in hierarchy) this
234 Con *con_get_output(Con *con) {
236 while (result != NULL && result->type != CT_OUTPUT)
237 result = result->parent;
238 /* We must be able to get an output because focus can never be set higher
239 * in the tree (root node cannot be focused). */
240 assert(result != NULL);
245 * Gets the workspace container this node is on.
248 Con *con_get_workspace(Con *con) {
250 while (result != NULL && result->type != CT_WORKSPACE)
251 result = result->parent;
256 * Searches parenst of the given 'con' until it reaches one with the specified
257 * 'orientation'. Aborts when it comes across a floating_con.
260 Con *con_parent_with_orientation(Con *con, orientation_t orientation) {
261 DLOG("Searching for parent of Con %p with orientation %d\n", con, orientation);
262 Con *parent = con->parent;
263 if (parent->type == CT_FLOATING_CON)
265 while (con_orientation(parent) != orientation) {
266 DLOG("Need to go one level further up\n");
267 parent = parent->parent;
268 /* Abort when we reach a floating con, or an output con */
270 (parent->type == CT_FLOATING_CON ||
271 parent->type == CT_OUTPUT ||
272 (parent->parent && parent->parent->type == CT_OUTPUT)))
277 DLOG("Result: %p\n", parent);
282 * helper data structure for the breadth-first-search in
283 * con_get_fullscreen_con()
289 TAILQ_ENTRY(bfs_entry) entries;
293 * Returns the first fullscreen node below this node.
296 Con *con_get_fullscreen_con(Con *con, int fullscreen_mode) {
297 Con *current, *child;
299 /* TODO: is breadth-first-search really appropriate? (check as soon as
300 * fullscreen levels and fullscreen for containers is implemented) */
301 TAILQ_HEAD(bfs_head, bfs_entry) bfs_head = TAILQ_HEAD_INITIALIZER(bfs_head);
302 struct bfs_entry *entry = smalloc(sizeof(struct bfs_entry));
304 TAILQ_INSERT_TAIL(&bfs_head, entry, entries);
306 while (!TAILQ_EMPTY(&bfs_head)) {
307 entry = TAILQ_FIRST(&bfs_head);
308 current = entry->con;
309 if (current != con && current->fullscreen_mode == fullscreen_mode) {
310 /* empty the queue */
311 while (!TAILQ_EMPTY(&bfs_head)) {
312 entry = TAILQ_FIRST(&bfs_head);
313 TAILQ_REMOVE(&bfs_head, entry, entries);
319 TAILQ_REMOVE(&bfs_head, entry, entries);
322 TAILQ_FOREACH(child, &(current->nodes_head), nodes) {
323 entry = smalloc(sizeof(struct bfs_entry));
325 TAILQ_INSERT_TAIL(&bfs_head, entry, entries);
328 TAILQ_FOREACH(child, &(current->floating_head), floating_windows) {
329 entry = smalloc(sizeof(struct bfs_entry));
331 TAILQ_INSERT_TAIL(&bfs_head, entry, entries);
339 * Returns true if the node is floating.
342 bool con_is_floating(Con *con) {
344 DLOG("checking if con %p is floating\n", con);
345 return (con->floating >= FLOATING_AUTO_ON);
349 * Checks if the given container is either floating or inside some floating
350 * container. It returns the FLOATING_CON container.
353 Con *con_inside_floating(Con *con) {
355 if (con->type == CT_FLOATING_CON)
358 if (con->floating >= FLOATING_AUTO_ON)
361 if (con->type == CT_WORKSPACE || con->type == CT_OUTPUT)
364 return con_inside_floating(con->parent);
368 * Checks if the given container is inside a focused container.
371 bool con_inside_focused(Con *con) {
376 return con_inside_focused(con->parent);
380 * Returns the container with the given client window ID or NULL if no such
384 Con *con_by_window_id(xcb_window_t window) {
386 TAILQ_FOREACH(con, &all_cons, all_cons)
387 if (con->window != NULL && con->window->id == window)
393 * Returns the container with the given frame ID or NULL if no such container
397 Con *con_by_frame_id(xcb_window_t frame) {
399 TAILQ_FOREACH(con, &all_cons, all_cons)
400 if (con->frame == frame)
406 * Returns the first container below 'con' which wants to swallow this window
410 Con *con_for_window(Con *con, i3Window *window, Match **store_match) {
413 //DLOG("searching con for window %p starting at con %p\n", window, con);
414 //DLOG("class == %s\n", window->class_class);
416 TAILQ_FOREACH(child, &(con->nodes_head), nodes) {
417 TAILQ_FOREACH(match, &(child->swallow_head), matches) {
418 if (!match_matches_window(match, window))
420 if (store_match != NULL)
421 *store_match = match;
424 Con *result = con_for_window(child, window, store_match);
429 TAILQ_FOREACH(child, &(con->floating_head), floating_windows) {
430 TAILQ_FOREACH(match, &(child->swallow_head), matches) {
431 if (!match_matches_window(match, window))
433 if (store_match != NULL)
434 *store_match = match;
437 Con *result = con_for_window(child, window, store_match);
446 * Returns the number of children of this container.
449 int con_num_children(Con *con) {
453 TAILQ_FOREACH(child, &(con->nodes_head), nodes)
460 * Updates the percent attribute of the children of the given container. This
461 * function needs to be called when a window is added or removed from a
465 void con_fix_percent(Con *con) {
467 int children = con_num_children(con);
469 // calculate how much we have distributed and how many containers
470 // with a percentage set we have
472 int children_with_percent = 0;
473 TAILQ_FOREACH(child, &(con->nodes_head), nodes) {
474 if (child->percent > 0.0) {
475 total += child->percent;
476 ++children_with_percent;
480 // if there were children without a percentage set, set to a value that
481 // will make those children proportional to all others
482 if (children_with_percent != children) {
483 TAILQ_FOREACH(child, &(con->nodes_head), nodes) {
484 if (child->percent <= 0.0) {
485 if (children_with_percent == 0)
486 total += (child->percent = 1.0);
487 else total += (child->percent = total / children_with_percent);
492 // if we got a zero, just distribute the space equally, otherwise
493 // distribute according to the proportions we got
495 TAILQ_FOREACH(child, &(con->nodes_head), nodes)
496 child->percent = 1.0 / children;
497 } else if (total != 1.0) {
498 TAILQ_FOREACH(child, &(con->nodes_head), nodes)
499 child->percent /= total;
504 * Toggles fullscreen mode for the given container. Fullscreen mode will not be
505 * entered when there already is a fullscreen container on this workspace.
508 void con_toggle_fullscreen(Con *con, int fullscreen_mode) {
509 Con *workspace, *fullscreen;
511 if (con->type == CT_WORKSPACE) {
512 DLOG("You cannot make a workspace fullscreen.\n");
516 DLOG("toggling fullscreen for %p / %s\n", con, con->name);
517 if (con->fullscreen_mode == CF_NONE) {
518 /* 1: check if there already is a fullscreen con */
519 if (fullscreen_mode == CF_GLOBAL)
520 fullscreen = con_get_fullscreen_con(croot, CF_GLOBAL);
522 workspace = con_get_workspace(con);
523 fullscreen = con_get_fullscreen_con(workspace, CF_OUTPUT);
525 if (fullscreen != NULL) {
526 /* Disable fullscreen for the currently fullscreened
527 * container and enable it for the one the user wants
528 * to have in fullscreen mode. */
529 LOG("Disabling fullscreen for (%p/%s) upon user request\n",
530 fullscreen, fullscreen->name);
531 fullscreen->fullscreen_mode = CF_NONE;
534 /* 2: enable fullscreen */
535 con->fullscreen_mode = fullscreen_mode;
537 /* 1: disable fullscreen */
538 con->fullscreen_mode = CF_NONE;
541 DLOG("mode now: %d\n", con->fullscreen_mode);
543 /* update _NET_WM_STATE if this container has a window */
544 /* TODO: when a window is assigned to a container which is already
545 * fullscreened, this state needs to be pushed to the client, too */
546 if (con->window == NULL)
550 unsigned int num = 0;
552 if (con->fullscreen_mode != CF_NONE)
553 values[num++] = A__NET_WM_STATE_FULLSCREEN;
555 xcb_change_property(conn, XCB_PROP_MODE_REPLACE, con->window->id,
556 A__NET_WM_STATE, XCB_ATOM_ATOM, 32, num, values);
560 * Moves the given container to the currently focused container on the given
563 * The fix_coordinates flag will translate the current coordinates (offset from
564 * the monitor position basically) to appropriate coordinates on the
565 * destination workspace.
566 * Not enabling this behaviour comes in handy when this function gets called by
567 * floating_maybe_reassign_ws, which will only "move" a floating window when it
568 * *already* changed its coordinates to a different output.
570 * The dont_warp flag disables pointer warping and will be set when this
571 * function is called while dragging a floating window.
573 * TODO: is there a better place for this function?
576 void con_move_to_workspace(Con *con, Con *workspace, bool fix_coordinates, bool dont_warp) {
577 if (con->type == CT_WORKSPACE) {
578 DLOG("Moving workspaces is not yet implemented.\n");
582 /* Prevent moving if this would violate the fullscreen focus restrictions. */
583 if (!con_fullscreen_permits_focusing(workspace)) {
584 LOG("Cannot move out of a fullscreen container");
588 if (con_is_floating(con)) {
589 DLOG("Using FLOATINGCON instead\n");
593 Con *source_ws = con_get_workspace(con);
594 if (workspace == source_ws) {
595 DLOG("Not moving, already there\n");
599 /* Save the current workspace. So we can call workspace_show() by the end
600 * of this function. */
601 Con *current_ws = con_get_workspace(focused);
603 Con *source_output = con_get_output(con),
604 *dest_output = con_get_output(workspace);
606 /* 1: save the container which is going to be focused after the current
607 * container is moved away */
608 Con *focus_next = con_next_focused(con);
610 /* 2: get the focused container of this workspace */
611 Con *next = con_descend_focused(workspace);
613 /* 3: we go up one level, but only when next is a normal container */
614 if (next->type != CT_WORKSPACE) {
615 DLOG("next originally = %p / %s / type %d\n", next, next->name, next->type);
619 /* 4: if the target container is floating, we get the workspace instead.
620 * Only tiling windows need to get inserted next to the current container.
622 Con *floatingcon = con_inside_floating(next);
623 if (floatingcon != NULL) {
624 DLOG("floatingcon, going up even further\n");
625 next = floatingcon->parent;
628 if (con->type == CT_FLOATING_CON) {
629 Con *ws = con_get_workspace(next);
630 DLOG("This is a floating window, using workspace %p / %s\n", ws, ws->name);
634 if (source_output != dest_output) {
635 /* Take the relative coordinates of the current output, then add them
636 * to the coordinate space of the correct output */
637 if (fix_coordinates && con->type == CT_FLOATING_CON) {
638 floating_fix_coordinates(con, &(source_output->rect), &(dest_output->rect));
639 } else DLOG("Not fixing coordinates, fix_coordinates flag = %d\n", fix_coordinates);
641 /* If moving to a visible workspace, call show so it can be considered
642 * focused. Must do before attaching because workspace_show checks to see
643 * if focused container is in its area. */
644 if (workspace_is_visible(workspace)) {
645 workspace_show(workspace);
647 /* Don’t warp if told so (when dragging floating windows with the
648 * mouse for example) */
652 x_set_warp_to(&(con->rect));
656 DLOG("Re-attaching container to %p / %s\n", next, next->name);
657 /* 5: re-attach the con to the parent of this focused container */
658 Con *parent = con->parent;
660 con_attach(con, next, false);
662 /* 6: fix the percentages */
663 con_fix_percent(parent);
665 con_fix_percent(next);
667 /* 7: focus the con on the target workspace (the X focus is only updated by
668 * calling tree_render(), so for the "real" focus this is a no-op).
669 * We don’t focus the con for i3 pseudo workspaces like __i3_scratch and
670 * we don’t focus when there is a fullscreen con on that workspace. */
671 if ((workspace->name[0] != '_' || workspace->name[1] != '_') &&
672 con_get_fullscreen_con(workspace, CF_OUTPUT) == NULL)
673 con_focus(con_descend_focused(con));
675 /* 8: when moving to a visible workspace on a different output, we keep the
676 * con focused. Otherwise, we leave the focus on the current workspace as we
677 * don’t want to focus invisible workspaces */
678 if (source_output != dest_output &&
679 workspace_is_visible(workspace)) {
680 DLOG("Moved to a different output, focusing target\n");
682 /* Descend focus stack in case focus_next is a workspace which can
683 * occur if we move to the same workspace. Also show current workspace
684 * to ensure it is focused. */
685 workspace_show(current_ws);
687 /* Set focus only if con was on current workspace before moving.
688 * Otherwise we would give focus to some window on different workspace. */
689 if (source_ws == current_ws)
690 con_focus(con_descend_focused(focus_next));
693 CALL(parent, on_remove_child);
697 * Returns the orientation of the given container (for stacked containers,
698 * vertical orientation is used regardless of the actual orientation of the
702 int con_orientation(Con *con) {
703 switch (con->layout) {
705 /* stacking containers behave like they are in vertical orientation */
710 /* tabbed containers behave like they are in vertical orientation */
715 DLOG("Someone called con_orientation() on a con with L_DEFAULT, this is a bug in the code.\n");
721 DLOG("con_orientation() called on dockarea/output (%d) container %p\n", con->layout, con);
726 DLOG("con_orientation() ran into default\n");
732 * Returns the container which will be focused next when the given container
733 * is not available anymore. Called in tree_close and con_move_to_workspace
734 * to properly restore focus.
737 Con *con_next_focused(Con *con) {
739 /* floating containers are attached to a workspace, so we focus either the
740 * next floating container (if any) or the workspace itself. */
741 if (con->type == CT_FLOATING_CON) {
742 DLOG("selecting next for CT_FLOATING_CON\n");
743 next = TAILQ_NEXT(con, floating_windows);
744 DLOG("next = %p\n", next);
746 next = TAILQ_PREV(con, floating_head, floating_windows);
747 DLOG("using prev, next = %p\n", next);
750 Con *ws = con_get_workspace(con);
752 DLOG("no more floating containers for next = %p, restoring workspace focus\n", next);
753 while (next != TAILQ_END(&(ws->focus_head)) && !TAILQ_EMPTY(&(next->focus_head))) {
754 next = TAILQ_FIRST(&(next->focus_head));
756 DLOG("skipping container itself, we want the next client\n");
757 next = TAILQ_NEXT(next, focused);
760 if (next == TAILQ_END(&(ws->focus_head))) {
761 DLOG("Focus list empty, returning ws\n");
765 /* Instead of returning the next CT_FLOATING_CON, we descend it to
766 * get an actual window to focus. */
767 next = con_descend_focused(next);
772 /* dock clients cannot be focused, so we focus the workspace instead */
773 if (con->parent->type == CT_DOCKAREA) {
774 DLOG("selecting workspace for dock client\n");
775 return con_descend_focused(output_get_content(con->parent->parent));
778 /* if 'con' is not the first entry in the focus stack, use the first one as
779 * it’s currently focused already */
780 Con *first = TAILQ_FIRST(&(con->parent->focus_head));
782 DLOG("Using first entry %p\n", first);
785 /* try to focus the next container on the same level as this one or fall
786 * back to its parent */
787 if (!(next = TAILQ_NEXT(con, focused)))
791 /* now go down the focus stack as far as
792 * possible, excluding the current container */
793 while (!TAILQ_EMPTY(&(next->focus_head)) &&
794 TAILQ_FIRST(&(next->focus_head)) != con)
795 next = TAILQ_FIRST(&(next->focus_head));
801 * Get the next/previous container in the specified orientation. This may
802 * travel up until it finds a container with suitable orientation.
805 Con *con_get_next(Con *con, char way, orientation_t orientation) {
806 DLOG("con_get_next(way=%c, orientation=%d)\n", way, orientation);
807 /* 1: get the first parent with the same orientation */
809 while (con_orientation(cur->parent) != orientation) {
810 DLOG("need to go one level further up\n");
811 if (cur->parent->type == CT_WORKSPACE) {
812 LOG("that's a workspace, we can't go further up\n");
818 /* 2: chose next (or previous) */
821 next = TAILQ_NEXT(cur, nodes);
822 /* if we are at the end of the list, we need to wrap */
823 if (next == TAILQ_END(&(parent->nodes_head)))
826 next = TAILQ_PREV(cur, nodes_head, nodes);
827 /* if we are at the end of the list, we need to wrap */
828 if (next == TAILQ_END(&(cur->nodes_head)))
831 DLOG("next = %p\n", next);
837 * Returns the focused con inside this client, descending the tree as far as
838 * possible. This comes in handy when attaching a con to a workspace at the
839 * currently focused position, for example.
842 Con *con_descend_focused(Con *con) {
844 while (next != focused && !TAILQ_EMPTY(&(next->focus_head)))
845 next = TAILQ_FIRST(&(next->focus_head));
850 * Returns the focused con inside this client, descending the tree as far as
851 * possible. This comes in handy when attaching a con to a workspace at the
852 * currently focused position, for example.
854 * Works like con_descend_focused but considers only tiling cons.
857 Con *con_descend_tiling_focused(Con *con) {
865 TAILQ_FOREACH(child, &(next->focus_head), focused) {
866 if (child->type == CT_FLOATING_CON)
872 } while (before != next && next != focused);
877 * Returns the leftmost, rightmost, etc. container in sub-tree. For example, if
878 * direction is D_LEFT, then we return the rightmost container and if direction
879 * is D_RIGHT, we return the leftmost container. This is because if we are
880 * moving D_LEFT, and thus want the rightmost container.
883 Con *con_descend_direction(Con *con, direction_t direction) {
885 int orientation = con_orientation(con);
886 DLOG("con_descend_direction(%p, orientation %d, direction %d)\n", con, orientation, direction);
887 if (direction == D_LEFT || direction == D_RIGHT) {
888 if (orientation == HORIZ) {
889 /* If the direction is horizontal, we can use either the first
890 * (D_RIGHT) or the last con (D_LEFT) */
891 if (direction == D_RIGHT)
892 most = TAILQ_FIRST(&(con->nodes_head));
893 else most = TAILQ_LAST(&(con->nodes_head), nodes_head);
894 } else if (orientation == VERT) {
895 /* Wrong orientation. We use the last focused con. Within that con,
896 * we recurse to chose the left/right con or at least the last
898 most = TAILQ_FIRST(&(con->focus_head));
900 /* If the con has no orientation set, it’s not a split container
901 * but a container with a client window, so stop recursing */
906 if (direction == D_UP || direction == D_DOWN) {
907 if (orientation == VERT) {
908 /* If the direction is vertical, we can use either the first
909 * (D_DOWN) or the last con (D_UP) */
910 if (direction == D_UP)
911 most = TAILQ_LAST(&(con->nodes_head), nodes_head);
912 else most = TAILQ_FIRST(&(con->nodes_head));
913 } else if (orientation == HORIZ) {
914 /* Wrong orientation. We use the last focused con. Within that con,
915 * we recurse to chose the top/bottom con or at least the last
917 most = TAILQ_FIRST(&(con->focus_head));
919 /* If the con has no orientation set, it’s not a split container
920 * but a container with a client window, so stop recursing */
927 return con_descend_direction(most, direction);
931 * Returns a "relative" Rect which contains the amount of pixels that need to
932 * be added to the original Rect to get the final position (obviously the
933 * amount of pixels for normal, 1pixel and borderless are different).
936 Rect con_border_style_rect(Con *con) {
937 adjacent_t borders_to_hide = ADJ_NONE;
939 borders_to_hide = con_adjacent_borders(con) & config.hide_edge_borders;
940 switch (con_border_style(con)) {
942 result = (Rect){2, 0, -(2 * 2), -2};
943 if (borders_to_hide & ADJ_LEFT_SCREEN_EDGE) {
947 if (borders_to_hide & ADJ_RIGHT_SCREEN_EDGE) {
950 /* With normal borders we never hide the upper border */
951 if (borders_to_hide & ADJ_LOWER_SCREEN_EDGE) {
957 result = (Rect){1, 1, -2, -2};
958 if (borders_to_hide & ADJ_LEFT_SCREEN_EDGE) {
962 if (borders_to_hide & ADJ_RIGHT_SCREEN_EDGE) {
965 if (borders_to_hide & ADJ_UPPER_SCREEN_EDGE) {
969 if (borders_to_hide & ADJ_LOWER_SCREEN_EDGE) {
975 return (Rect){0, 0, 0, 0};
983 * Returns adjacent borders of the window. We need this if hide_edge_borders is
986 adjacent_t con_adjacent_borders(Con *con) {
987 adjacent_t result = ADJ_NONE;
988 Con *workspace = con_get_workspace(con);
989 if (con->rect.x == workspace->rect.x)
990 result |= ADJ_LEFT_SCREEN_EDGE;
991 if (con->rect.x + con->rect.width == workspace->rect.x + workspace->rect.width)
992 result |= ADJ_RIGHT_SCREEN_EDGE;
993 if (con->rect.y == workspace->rect.y)
994 result |= ADJ_UPPER_SCREEN_EDGE;
995 if (con->rect.y + con->rect.height == workspace->rect.y + workspace->rect.height)
996 result |= ADJ_LOWER_SCREEN_EDGE;
1001 * Use this function to get a container’s border style. This is important
1002 * because when inside a stack, the border style is always BS_NORMAL.
1003 * For tabbed mode, the same applies, with one exception: when the container is
1004 * borderless and the only element in the tabbed container, the border is not
1007 * For children of a CT_DOCKAREA, the border style is always none.
1010 int con_border_style(Con *con) {
1011 Con *fs = con_get_fullscreen_con(con->parent, CF_OUTPUT);
1013 DLOG("this one is fullscreen! overriding BS_NONE\n");
1017 if (con->parent->layout == L_STACKED)
1018 return (con_num_children(con->parent) == 1 ? con->border_style : BS_NORMAL);
1020 if (con->parent->layout == L_TABBED && con->border_style != BS_NORMAL)
1021 return (con_num_children(con->parent) == 1 ? con->border_style : BS_NORMAL);
1023 if (con->parent->type == CT_DOCKAREA)
1026 return con->border_style;
1030 * Sets the given border style on con, correctly keeping the position/size of a
1034 void con_set_border_style(Con *con, int border_style) {
1035 /* Handle the simple case: non-floating containerns */
1036 if (!con_is_floating(con)) {
1037 con->border_style = border_style;
1041 /* For floating containers, we want to keep the position/size of the
1042 * *window* itself. We first add the border pixels to con->rect to make
1043 * con->rect represent the absolute position of the window. Then, we change
1044 * the border and subtract the new border pixels. Afterwards, we update
1045 * parent->rect to contain con. */
1046 DLOG("This is a floating container\n");
1048 Rect bsr = con_border_style_rect(con);
1049 con->rect.x += bsr.x;
1050 con->rect.y += bsr.y;
1051 con->rect.width += bsr.width;
1052 con->rect.height += bsr.height;
1054 /* Change the border style, get new border/decoration values. */
1055 con->border_style = border_style;
1056 bsr = con_border_style_rect(con);
1058 (con->border_style == BS_NORMAL ? config.font.height + 5 : 0);
1060 con->rect.x -= bsr.x;
1061 con->rect.y -= bsr.y;
1062 con->rect.width -= bsr.width;
1063 con->rect.height -= bsr.height;
1065 Con *parent = con->parent;
1066 parent->rect.x = con->rect.x;
1067 parent->rect.y = con->rect.y - deco_height;
1068 parent->rect.width = con->rect.width;
1069 parent->rect.height = con->rect.height + deco_height;
1073 * This function changes the layout of a given container. Use it to handle
1074 * special cases like changing a whole workspace to stacked/tabbed (creates a
1075 * new split container before).
1078 void con_set_layout(Con *con, int layout) {
1079 /* We fill in last_split_layout when switching to a different layout
1080 * since there are many places in the code that don’t use
1081 * con_set_layout(). */
1082 if (con->layout == L_SPLITH || con->layout == L_SPLITV)
1083 con->last_split_layout = con->layout;
1085 /* When the container type is CT_WORKSPACE, the user wants to change the
1086 * whole workspace into stacked/tabbed mode. To do this and still allow
1087 * intuitive operations (like level-up and then opening a new window), we
1088 * need to create a new split container. */
1089 if (con->type == CT_WORKSPACE) {
1090 DLOG("Creating new split container\n");
1091 /* 1: create a new split container */
1092 Con *new = con_new(NULL, NULL);
1095 /* 2: Set the requested layout on the split container and mark it as
1097 con_set_layout(new, layout);
1098 new->last_split_layout = con->last_split_layout;
1101 Con *old_focused = TAILQ_FIRST(&(con->focus_head));
1102 if (old_focused == TAILQ_END(&(con->focus_head)))
1105 /* 3: move the existing cons of this workspace below the new con */
1106 DLOG("Moving cons\n");
1108 while (!TAILQ_EMPTY(&(con->nodes_head))) {
1109 child = TAILQ_FIRST(&(con->nodes_head));
1111 con_attach(child, new, true);
1114 /* 4: attach the new split container to the workspace */
1115 DLOG("Attaching new split to ws\n");
1116 con_attach(new, con, false);
1119 con_focus(old_focused);
1121 tree_flatten(croot);
1126 if (layout == L_DEFAULT) {
1127 /* Special case: the layout formerly known as "default" (in combination
1128 * with an orientation). Since we switched to splith/splitv layouts,
1129 * using the "default" layout (which "only" should happen when using
1130 * legacy configs) is using the last split layout (either splith or
1131 * splitv) in order to still do the same thing.
1133 * Starting from v4.6 though, we will nag users about using "layout
1134 * default", and in v4.9 we will remove it entirely (with an
1135 * appropriate i3-migrate-config mechanism). */
1136 con->layout = con->last_split_layout;
1137 /* In case last_split_layout was not initialized… */
1138 if (con->layout == L_DEFAULT)
1139 con->layout = L_SPLITH;
1141 con->layout = layout;
1146 * This function toggles the layout of a given container. toggle_mode can be
1147 * either 'default' (toggle only between stacked/tabbed/last_split_layout),
1148 * 'split' (toggle only between splitv/splith) or 'all' (toggle between all
1152 void con_toggle_layout(Con *con, const char *toggle_mode) {
1153 if (strcmp(toggle_mode, "split") == 0) {
1154 /* Toggle between splits. When the current layout is not a split
1155 * layout, we just switch back to last_split_layout. Otherwise, we
1156 * change to the opposite split layout. */
1157 if (con->layout != L_SPLITH && con->layout != L_SPLITV)
1158 con_set_layout(con, con->last_split_layout);
1160 if (con->layout == L_SPLITH)
1161 con_set_layout(con, L_SPLITV);
1162 else con_set_layout(con, L_SPLITH);
1165 if (con->layout == L_STACKED)
1166 con_set_layout(con, L_TABBED);
1167 else if (con->layout == L_TABBED) {
1168 if (strcmp(toggle_mode, "all") == 0)
1169 con_set_layout(con, L_SPLITH);
1170 else con_set_layout(con, con->last_split_layout);
1171 } else if (con->layout == L_SPLITH || con->layout == L_SPLITV) {
1172 if (strcmp(toggle_mode, "all") == 0) {
1173 /* When toggling through all modes, we toggle between
1174 * splith/splitv, whereas normally we just directly jump to
1176 if (con->layout == L_SPLITH)
1177 con_set_layout(con, L_SPLITV);
1178 else con_set_layout(con, L_STACKED);
1180 con_set_layout(con, L_STACKED);
1187 * Callback which will be called when removing a child from the given con.
1188 * Kills the container if it is empty and replaces it with the child if there
1189 * is exactly one child.
1192 static void con_on_remove_child(Con *con) {
1193 DLOG("on_remove_child\n");
1195 /* Every container 'above' (in the hierarchy) the workspace content should
1196 * not be closed when the last child was removed */
1197 if (con->type == CT_OUTPUT ||
1198 con->type == CT_ROOT ||
1199 con->type == CT_DOCKAREA) {
1200 DLOG("not handling, type = %d\n", con->type);
1204 /* For workspaces, close them only if they're not visible anymore */
1205 if (con->type == CT_WORKSPACE) {
1206 if (TAILQ_EMPTY(&(con->focus_head)) && !workspace_is_visible(con)) {
1207 LOG("Closing old workspace (%p / %s), it is empty\n", con, con->name);
1208 tree_close(con, DONT_KILL_WINDOW, false, false);
1209 ipc_send_event("workspace", I3_IPC_EVENT_WORKSPACE, "{\"change\":\"empty\"}");
1214 /* TODO: check if this container would swallow any other client and
1215 * don’t close it automatically. */
1216 int children = con_num_children(con);
1217 if (children == 0) {
1218 DLOG("Container empty, closing\n");
1219 tree_close(con, DONT_KILL_WINDOW, false, false);
1225 * Determines the minimum size of the given con by looking at its children (for
1226 * split/stacked/tabbed cons). Will be called when resizing floating cons
1229 Rect con_minimum_size(Con *con) {
1230 DLOG("Determining minimum size for con %p\n", con);
1232 if (con_is_leaf(con)) {
1233 DLOG("leaf node, returning 75x50\n");
1234 return (Rect){ 0, 0, 75, 50 };
1237 if (con->type == CT_FLOATING_CON) {
1238 DLOG("floating con\n");
1239 Con *child = TAILQ_FIRST(&(con->nodes_head));
1240 return con_minimum_size(child);
1243 if (con->layout == L_STACKED || con->layout == L_TABBED) {
1244 uint32_t max_width = 0, max_height = 0, deco_height = 0;
1246 TAILQ_FOREACH(child, &(con->nodes_head), nodes) {
1247 Rect min = con_minimum_size(child);
1248 deco_height += child->deco_rect.height;
1249 max_width = max(max_width, min.width);
1250 max_height = max(max_height, min.height);
1252 DLOG("stacked/tabbed now, returning %d x %d + deco_rect = %d\n",
1253 max_width, max_height, deco_height);
1254 return (Rect){ 0, 0, max_width, max_height + deco_height };
1257 /* For horizontal/vertical split containers we sum up the width (h-split)
1258 * or height (v-split) and use the maximum of the height (h-split) or width
1259 * (v-split) as minimum size. */
1261 uint32_t width = 0, height = 0;
1263 TAILQ_FOREACH(child, &(con->nodes_head), nodes) {
1264 Rect min = con_minimum_size(child);
1265 if (con->layout == L_SPLITH) {
1267 height = max(height, min.height);
1269 height += min.height;
1270 width = max(width, min.width);
1273 DLOG("split container, returning width = %d x height = %d\n", width, height);
1274 return (Rect){ 0, 0, width, height };
1277 ELOG("Unhandled case, type = %d, layout = %d, split = %d\n",
1278 con->type, con->layout, con->split);
1283 * Returns true if changing the focus to con would be allowed considering
1284 * the fullscreen focus constraints. Specifically, if a fullscreen container or
1285 * any of its descendants is focused, this function returns true if and only if
1286 * focusing con would mean that focus would still be visible on screen, i.e.,
1287 * the newly focused container would not be obscured by a fullscreen container.
1289 * In the simplest case, if a fullscreen container or any of its descendants is
1290 * fullscreen, this functions returns true if con is the fullscreen container
1291 * itself or any of its descendants, as this means focus wouldn't escape the
1292 * boundaries of the fullscreen container.
1294 * In case the fullscreen container is of type CF_OUTPUT, this function returns
1295 * true if con is on a different workspace, as focus wouldn't be obscured by
1296 * the fullscreen container that is constrained to a different workspace.
1298 * Note that this same logic can be applied to moving containers. If a
1299 * container can be focused under the fullscreen focus constraints, it can also
1300 * become a parent or sibling to the currently focused container.
1303 bool con_fullscreen_permits_focusing(Con *con) {
1304 /* No focus, no problem. */
1308 /* Find the first fullscreen ascendent. */
1310 while (fs && fs->fullscreen_mode == CF_NONE)
1313 /* fs must be non-NULL since the workspace con doesn’t have CF_NONE and
1314 * there always has to be a workspace con in the hierarchy. */
1316 /* The most common case is we hit the workspace level. In this
1317 * situation, changing focus is also harmless. */
1318 assert(fs->fullscreen_mode != CF_NONE);
1319 if (fs->type == CT_WORKSPACE)
1322 /* Allow it if the container itself is the fullscreen container. */
1326 /* If fullscreen is per-output, the focus being in a different workspace is
1327 * sufficient to guarantee that change won't leave fullscreen in bad shape. */
1328 if (fs->fullscreen_mode == CF_OUTPUT &&
1329 con_get_workspace(con) != con_get_workspace(fs)) {
1333 /* Allow it only if the container to be focused is contained within the
1334 * current fullscreen container. */
1336 if (con->parent == fs)
1341 /* Focusing con would hide it behind a fullscreen window, disallow it. */