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)
220 if (con->orientation != NO_ORIENTATION) {
221 DLOG("container %p does not accepts windows, orientation != NO_ORIENTATION\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 */
269 if (parent && parent->type == CT_FLOATING_CON)
274 DLOG("Result: %p\n", parent);
279 * helper data structure for the breadth-first-search in
280 * con_get_fullscreen_con()
286 TAILQ_ENTRY(bfs_entry) entries;
290 * Returns the first fullscreen node below this node.
293 Con *con_get_fullscreen_con(Con *con, int fullscreen_mode) {
294 Con *current, *child;
296 /* TODO: is breadth-first-search really appropriate? (check as soon as
297 * fullscreen levels and fullscreen for containers is implemented) */
298 TAILQ_HEAD(bfs_head, bfs_entry) bfs_head = TAILQ_HEAD_INITIALIZER(bfs_head);
299 struct bfs_entry *entry = smalloc(sizeof(struct bfs_entry));
301 TAILQ_INSERT_TAIL(&bfs_head, entry, entries);
303 while (!TAILQ_EMPTY(&bfs_head)) {
304 entry = TAILQ_FIRST(&bfs_head);
305 current = entry->con;
306 if (current != con && current->fullscreen_mode == fullscreen_mode) {
307 /* empty the queue */
308 while (!TAILQ_EMPTY(&bfs_head)) {
309 entry = TAILQ_FIRST(&bfs_head);
310 TAILQ_REMOVE(&bfs_head, entry, entries);
316 TAILQ_REMOVE(&bfs_head, entry, entries);
319 TAILQ_FOREACH(child, &(current->nodes_head), nodes) {
320 entry = smalloc(sizeof(struct bfs_entry));
322 TAILQ_INSERT_TAIL(&bfs_head, entry, entries);
325 TAILQ_FOREACH(child, &(current->floating_head), floating_windows) {
326 entry = smalloc(sizeof(struct bfs_entry));
328 TAILQ_INSERT_TAIL(&bfs_head, entry, entries);
336 * Returns true if the node is floating.
339 bool con_is_floating(Con *con) {
341 DLOG("checking if con %p is floating\n", con);
342 return (con->floating >= FLOATING_AUTO_ON);
346 * Checks if the given container is either floating or inside some floating
347 * container. It returns the FLOATING_CON container.
350 Con *con_inside_floating(Con *con) {
352 if (con->type == CT_FLOATING_CON)
355 if (con->floating >= FLOATING_AUTO_ON)
358 if (con->type == CT_WORKSPACE || con->type == CT_OUTPUT)
361 return con_inside_floating(con->parent);
365 * Checks if the given container is inside a focused container.
368 bool con_inside_focused(Con *con) {
373 return con_inside_focused(con->parent);
377 * Returns the container with the given client window ID or NULL if no such
381 Con *con_by_window_id(xcb_window_t window) {
383 TAILQ_FOREACH(con, &all_cons, all_cons)
384 if (con->window != NULL && con->window->id == window)
390 * Returns the container with the given frame ID or NULL if no such container
394 Con *con_by_frame_id(xcb_window_t frame) {
396 TAILQ_FOREACH(con, &all_cons, all_cons)
397 if (con->frame == frame)
403 * Returns the first container below 'con' which wants to swallow this window
407 Con *con_for_window(Con *con, i3Window *window, Match **store_match) {
410 //DLOG("searching con for window %p starting at con %p\n", window, con);
411 //DLOG("class == %s\n", window->class_class);
413 TAILQ_FOREACH(child, &(con->nodes_head), nodes) {
414 TAILQ_FOREACH(match, &(child->swallow_head), matches) {
415 if (!match_matches_window(match, window))
417 if (store_match != NULL)
418 *store_match = match;
421 Con *result = con_for_window(child, window, store_match);
426 TAILQ_FOREACH(child, &(con->floating_head), floating_windows) {
427 TAILQ_FOREACH(match, &(child->swallow_head), matches) {
428 if (!match_matches_window(match, window))
430 if (store_match != NULL)
431 *store_match = match;
434 Con *result = con_for_window(child, window, store_match);
443 * Returns the number of children of this container.
446 int con_num_children(Con *con) {
450 TAILQ_FOREACH(child, &(con->nodes_head), nodes)
457 * Updates the percent attribute of the children of the given container. This
458 * function needs to be called when a window is added or removed from a
462 void con_fix_percent(Con *con) {
464 int children = con_num_children(con);
466 // calculate how much we have distributed and how many containers
467 // with a percentage set we have
469 int children_with_percent = 0;
470 TAILQ_FOREACH(child, &(con->nodes_head), nodes) {
471 if (child->percent > 0.0) {
472 total += child->percent;
473 ++children_with_percent;
477 // if there were children without a percentage set, set to a value that
478 // will make those children proportional to all others
479 if (children_with_percent != children) {
480 TAILQ_FOREACH(child, &(con->nodes_head), nodes) {
481 if (child->percent <= 0.0) {
482 if (children_with_percent == 0)
483 total += (child->percent = 1.0);
484 else total += (child->percent = total / children_with_percent);
489 // if we got a zero, just distribute the space equally, otherwise
490 // distribute according to the proportions we got
492 TAILQ_FOREACH(child, &(con->nodes_head), nodes)
493 child->percent = 1.0 / children;
494 } else if (total != 1.0) {
495 TAILQ_FOREACH(child, &(con->nodes_head), nodes)
496 child->percent /= total;
501 * Toggles fullscreen mode for the given container. Fullscreen mode will not be
502 * entered when there already is a fullscreen container on this workspace.
505 void con_toggle_fullscreen(Con *con, int fullscreen_mode) {
506 Con *workspace, *fullscreen;
508 if (con->type == CT_WORKSPACE) {
509 DLOG("You cannot make a workspace fullscreen.\n");
513 DLOG("toggling fullscreen for %p / %s\n", con, con->name);
514 if (con->fullscreen_mode == CF_NONE) {
515 /* 1: check if there already is a fullscreen con */
516 if (fullscreen_mode == CF_GLOBAL)
517 fullscreen = con_get_fullscreen_con(croot, CF_GLOBAL);
519 workspace = con_get_workspace(con);
520 fullscreen = con_get_fullscreen_con(workspace, CF_OUTPUT);
522 if (fullscreen != NULL) {
523 /* Disable fullscreen for the currently fullscreened
524 * container and enable it for the one the user wants
525 * to have in fullscreen mode. */
526 LOG("Disabling fullscreen for (%p/%s) upon user request\n",
527 fullscreen, fullscreen->name);
528 fullscreen->fullscreen_mode = CF_NONE;
531 /* 2: enable fullscreen */
532 con->fullscreen_mode = fullscreen_mode;
534 /* 1: disable fullscreen */
535 con->fullscreen_mode = CF_NONE;
538 DLOG("mode now: %d\n", con->fullscreen_mode);
540 /* update _NET_WM_STATE if this container has a window */
541 /* TODO: when a window is assigned to a container which is already
542 * fullscreened, this state needs to be pushed to the client, too */
543 if (con->window == NULL)
547 unsigned int num = 0;
549 if (con->fullscreen_mode != CF_NONE)
550 values[num++] = A__NET_WM_STATE_FULLSCREEN;
552 xcb_change_property(conn, XCB_PROP_MODE_REPLACE, con->window->id,
553 A__NET_WM_STATE, XCB_ATOM_ATOM, 32, num, values);
557 * Moves the given container to the currently focused container on the given
560 * The fix_coordinates flag will translate the current coordinates (offset from
561 * the monitor position basically) to appropriate coordinates on the
562 * destination workspace.
563 * Not enabling this behaviour comes in handy when this function gets called by
564 * floating_maybe_reassign_ws, which will only "move" a floating window when it
565 * *already* changed its coordinates to a different output.
567 * The dont_warp flag disables pointer warping and will be set when this
568 * function is called while dragging a floating window.
570 * TODO: is there a better place for this function?
573 void con_move_to_workspace(Con *con, Con *workspace, bool fix_coordinates, bool dont_warp) {
574 if (con->type == CT_WORKSPACE) {
575 DLOG("Moving workspaces is not yet implemented.\n");
579 /* Prevent moving if this would violate the fullscreen focus restrictions. */
580 if (!con_fullscreen_permits_focusing(workspace)) {
581 LOG("Cannot move out of a fullscreen container");
585 if (con_is_floating(con)) {
586 DLOG("Using FLOATINGCON instead\n");
590 Con *source_ws = con_get_workspace(con);
591 if (workspace == source_ws) {
592 DLOG("Not moving, already there\n");
596 /* Save the current workspace. So we can call workspace_show() by the end
597 * of this function. */
598 Con *current_ws = con_get_workspace(focused);
600 Con *source_output = con_get_output(con),
601 *dest_output = con_get_output(workspace);
603 /* 1: save the container which is going to be focused after the current
604 * container is moved away */
605 Con *focus_next = con_next_focused(con);
607 /* 2: get the focused container of this workspace */
608 Con *next = con_descend_focused(workspace);
610 /* 3: we go up one level, but only when next is a normal container */
611 if (next->type != CT_WORKSPACE) {
612 DLOG("next originally = %p / %s / type %d\n", next, next->name, next->type);
616 /* 4: if the target container is floating, we get the workspace instead.
617 * Only tiling windows need to get inserted next to the current container.
619 Con *floatingcon = con_inside_floating(next);
620 if (floatingcon != NULL) {
621 DLOG("floatingcon, going up even further\n");
622 next = floatingcon->parent;
625 if (con->type == CT_FLOATING_CON) {
626 Con *ws = con_get_workspace(next);
627 DLOG("This is a floating window, using workspace %p / %s\n", ws, ws->name);
631 if (source_output != dest_output) {
632 /* Take the relative coordinates of the current output, then add them
633 * to the coordinate space of the correct output */
634 if (fix_coordinates && con->type == CT_FLOATING_CON) {
635 floating_fix_coordinates(con, &(source_output->rect), &(dest_output->rect));
636 } else DLOG("Not fixing coordinates, fix_coordinates flag = %d\n", fix_coordinates);
638 /* If moving to a visible workspace, call show so it can be considered
639 * focused. Must do before attaching because workspace_show checks to see
640 * if focused container is in its area. */
641 if (workspace_is_visible(workspace)) {
642 workspace_show(workspace);
644 /* Don’t warp if told so (when dragging floating windows with the
645 * mouse for example) */
649 x_set_warp_to(&(con->rect));
653 DLOG("Re-attaching container to %p / %s\n", next, next->name);
654 /* 5: re-attach the con to the parent of this focused container */
655 Con *parent = con->parent;
657 con_attach(con, next, false);
659 /* 6: fix the percentages */
660 con_fix_percent(parent);
662 con_fix_percent(next);
664 /* 7: focus the con on the target workspace (the X focus is only updated by
665 * calling tree_render(), so for the "real" focus this is a no-op).
666 * We don’t focus the con for i3 pseudo workspaces like __i3_scratch and
667 * we don’t focus when there is a fullscreen con on that workspace. */
668 if ((workspace->name[0] != '_' || workspace->name[1] != '_') &&
669 con_get_fullscreen_con(workspace, CF_OUTPUT) == NULL)
670 con_focus(con_descend_focused(con));
672 /* 8: when moving to a visible workspace on a different output, we keep the
673 * con focused. Otherwise, we leave the focus on the current workspace as we
674 * don’t want to focus invisible workspaces */
675 if (source_output != dest_output &&
676 workspace_is_visible(workspace)) {
677 DLOG("Moved to a different output, focusing target\n");
679 /* Descend focus stack in case focus_next is a workspace which can
680 * occur if we move to the same workspace. Also show current workspace
681 * to ensure it is focused. */
682 workspace_show(current_ws);
684 /* Set focus only if con was on current workspace before moving.
685 * Otherwise we would give focus to some window on different workspace. */
686 if (source_ws == current_ws)
687 con_focus(con_descend_focused(focus_next));
690 CALL(parent, on_remove_child);
694 * Returns the orientation of the given container (for stacked containers,
695 * vertical orientation is used regardless of the actual orientation of the
699 int con_orientation(Con *con) {
700 /* stacking containers behave like they are in vertical orientation */
701 if (con->layout == L_STACKED)
704 if (con->layout == L_TABBED)
707 return con->orientation;
711 * Returns the container which will be focused next when the given container
712 * is not available anymore. Called in tree_close and con_move_to_workspace
713 * to properly restore focus.
716 Con *con_next_focused(Con *con) {
718 /* floating containers are attached to a workspace, so we focus either the
719 * next floating container (if any) or the workspace itself. */
720 if (con->type == CT_FLOATING_CON) {
721 DLOG("selecting next for CT_FLOATING_CON\n");
722 next = TAILQ_NEXT(con, floating_windows);
723 DLOG("next = %p\n", next);
725 next = TAILQ_PREV(con, floating_head, floating_windows);
726 DLOG("using prev, next = %p\n", next);
729 Con *ws = con_get_workspace(con);
731 DLOG("no more floating containers for next = %p, restoring workspace focus\n", next);
732 while (next != TAILQ_END(&(ws->focus_head)) && !TAILQ_EMPTY(&(next->focus_head))) {
733 next = TAILQ_FIRST(&(next->focus_head));
735 DLOG("skipping container itself, we want the next client\n");
736 next = TAILQ_NEXT(next, focused);
739 if (next == TAILQ_END(&(ws->focus_head))) {
740 DLOG("Focus list empty, returning ws\n");
744 /* Instead of returning the next CT_FLOATING_CON, we descend it to
745 * get an actual window to focus. */
746 next = con_descend_focused(next);
751 /* dock clients cannot be focused, so we focus the workspace instead */
752 if (con->parent->type == CT_DOCKAREA) {
753 DLOG("selecting workspace for dock client\n");
754 return con_descend_focused(output_get_content(con->parent->parent));
757 /* if 'con' is not the first entry in the focus stack, use the first one as
758 * it’s currently focused already */
759 Con *first = TAILQ_FIRST(&(con->parent->focus_head));
761 DLOG("Using first entry %p\n", first);
764 /* try to focus the next container on the same level as this one or fall
765 * back to its parent */
766 if (!(next = TAILQ_NEXT(con, focused)))
770 /* now go down the focus stack as far as
771 * possible, excluding the current container */
772 while (!TAILQ_EMPTY(&(next->focus_head)) &&
773 TAILQ_FIRST(&(next->focus_head)) != con)
774 next = TAILQ_FIRST(&(next->focus_head));
780 * Get the next/previous container in the specified orientation. This may
781 * travel up until it finds a container with suitable orientation.
784 Con *con_get_next(Con *con, char way, orientation_t orientation) {
785 DLOG("con_get_next(way=%c, orientation=%d)\n", way, orientation);
786 /* 1: get the first parent with the same orientation */
788 while (con_orientation(cur->parent) != orientation) {
789 DLOG("need to go one level further up\n");
790 if (cur->parent->type == CT_WORKSPACE) {
791 LOG("that's a workspace, we can't go further up\n");
797 /* 2: chose next (or previous) */
800 next = TAILQ_NEXT(cur, nodes);
801 /* if we are at the end of the list, we need to wrap */
802 if (next == TAILQ_END(&(parent->nodes_head)))
805 next = TAILQ_PREV(cur, nodes_head, nodes);
806 /* if we are at the end of the list, we need to wrap */
807 if (next == TAILQ_END(&(cur->nodes_head)))
810 DLOG("next = %p\n", next);
816 * Returns the focused con inside this client, descending the tree as far as
817 * possible. This comes in handy when attaching a con to a workspace at the
818 * currently focused position, for example.
821 Con *con_descend_focused(Con *con) {
823 while (next != focused && !TAILQ_EMPTY(&(next->focus_head)))
824 next = TAILQ_FIRST(&(next->focus_head));
829 * Returns the focused con inside this client, descending the tree as far as
830 * possible. This comes in handy when attaching a con to a workspace at the
831 * currently focused position, for example.
833 * Works like con_descend_focused but considers only tiling cons.
836 Con *con_descend_tiling_focused(Con *con) {
844 TAILQ_FOREACH(child, &(next->focus_head), focused) {
845 if (child->type == CT_FLOATING_CON)
851 } while (before != next && next != focused);
856 * Returns the leftmost, rightmost, etc. container in sub-tree. For example, if
857 * direction is D_LEFT, then we return the rightmost container and if direction
858 * is D_RIGHT, we return the leftmost container. This is because if we are
859 * moving D_LEFT, and thus want the rightmost container.
862 Con *con_descend_direction(Con *con, direction_t direction) {
864 int orientation = con_orientation(con);
865 DLOG("con_descend_direction(%p, orientation %d, direction %d)\n", con, orientation, direction);
866 if (direction == D_LEFT || direction == D_RIGHT) {
867 if (orientation == HORIZ) {
868 /* If the direction is horizontal, we can use either the first
869 * (D_RIGHT) or the last con (D_LEFT) */
870 if (direction == D_RIGHT)
871 most = TAILQ_FIRST(&(con->nodes_head));
872 else most = TAILQ_LAST(&(con->nodes_head), nodes_head);
873 } else if (orientation == VERT) {
874 /* Wrong orientation. We use the last focused con. Within that con,
875 * we recurse to chose the left/right con or at least the last
877 most = TAILQ_FIRST(&(con->focus_head));
879 /* If the con has no orientation set, it’s not a split container
880 * but a container with a client window, so stop recursing */
885 if (direction == D_UP || direction == D_DOWN) {
886 if (orientation == VERT) {
887 /* If the direction is vertical, we can use either the first
888 * (D_DOWN) or the last con (D_UP) */
889 if (direction == D_UP)
890 most = TAILQ_LAST(&(con->nodes_head), nodes_head);
891 else most = TAILQ_FIRST(&(con->nodes_head));
892 } else if (orientation == HORIZ) {
893 /* Wrong orientation. We use the last focused con. Within that con,
894 * we recurse to chose the top/bottom con or at least the last
896 most = TAILQ_FIRST(&(con->focus_head));
898 /* If the con has no orientation set, it’s not a split container
899 * but a container with a client window, so stop recursing */
906 return con_descend_direction(most, direction);
910 * Returns a "relative" Rect which contains the amount of pixels that need to
911 * be added to the original Rect to get the final position (obviously the
912 * amount of pixels for normal, 1pixel and borderless are different).
915 Rect con_border_style_rect(Con *con) {
916 switch (con_border_style(con)) {
918 return (Rect){2, 0, -(2 * 2), -2};
921 return (Rect){1, 1, -2, -2};
924 return (Rect){0, 0, 0, 0};
932 * Use this function to get a container’s border style. This is important
933 * because when inside a stack, the border style is always BS_NORMAL.
934 * For tabbed mode, the same applies, with one exception: when the container is
935 * borderless and the only element in the tabbed container, the border is not
938 * For children of a CT_DOCKAREA, the border style is always none.
941 int con_border_style(Con *con) {
942 Con *fs = con_get_fullscreen_con(con->parent, CF_OUTPUT);
944 DLOG("this one is fullscreen! overriding BS_NONE\n");
948 if (con->parent->layout == L_STACKED)
949 return (con_num_children(con->parent) == 1 ? con->border_style : BS_NORMAL);
951 if (con->parent->layout == L_TABBED && con->border_style != BS_NORMAL)
952 return (con_num_children(con->parent) == 1 ? con->border_style : BS_NORMAL);
954 if (con->parent->type == CT_DOCKAREA)
957 return con->border_style;
961 * Sets the given border style on con, correctly keeping the position/size of a
965 void con_set_border_style(Con *con, int border_style) {
966 /* Handle the simple case: non-floating containerns */
967 if (!con_is_floating(con)) {
968 con->border_style = border_style;
972 /* For floating containers, we want to keep the position/size of the
973 * *window* itself. We first add the border pixels to con->rect to make
974 * con->rect represent the absolute position of the window. Then, we change
975 * the border and subtract the new border pixels. Afterwards, we update
976 * parent->rect to contain con. */
977 DLOG("This is a floating container\n");
979 Rect bsr = con_border_style_rect(con);
980 con->rect.x += bsr.x;
981 con->rect.y += bsr.y;
982 con->rect.width += bsr.width;
983 con->rect.height += bsr.height;
985 /* Change the border style, get new border/decoration values. */
986 con->border_style = border_style;
987 bsr = con_border_style_rect(con);
989 (con->border_style == BS_NORMAL ? config.font.height + 5 : 0);
991 con->rect.x -= bsr.x;
992 con->rect.y -= bsr.y;
993 con->rect.width -= bsr.width;
994 con->rect.height -= bsr.height;
996 Con *parent = con->parent;
997 parent->rect.x = con->rect.x;
998 parent->rect.y = con->rect.y - deco_height;
999 parent->rect.width = con->rect.width;
1000 parent->rect.height = con->rect.height + deco_height;
1004 * This function changes the layout of a given container. Use it to handle
1005 * special cases like changing a whole workspace to stacked/tabbed (creates a
1006 * new split container before).
1009 void con_set_layout(Con *con, int layout) {
1010 /* When the container type is CT_WORKSPACE, the user wants to change the
1011 * whole workspace into stacked/tabbed mode. To do this and still allow
1012 * intuitive operations (like level-up and then opening a new window), we
1013 * need to create a new split container. */
1014 if (con->type == CT_WORKSPACE) {
1015 DLOG("Creating new split container\n");
1016 /* 1: create a new split container */
1017 Con *new = con_new(NULL, NULL);
1020 /* 2: set the requested layout on the split con */
1021 new->layout = layout;
1023 /* 3: While the layout is irrelevant in stacked/tabbed mode, it needs
1024 * to be set. Otherwise, this con will not be interpreted as a split
1026 if (config.default_orientation == NO_ORIENTATION) {
1027 new->orientation = (con->rect.height > con->rect.width) ? VERT : HORIZ;
1029 new->orientation = config.default_orientation;
1032 Con *old_focused = TAILQ_FIRST(&(con->focus_head));
1033 if (old_focused == TAILQ_END(&(con->focus_head)))
1036 /* 4: move the existing cons of this workspace below the new con */
1037 DLOG("Moving cons\n");
1039 while (!TAILQ_EMPTY(&(con->nodes_head))) {
1040 child = TAILQ_FIRST(&(con->nodes_head));
1042 con_attach(child, new, true);
1045 /* 4: attach the new split container to the workspace */
1046 DLOG("Attaching new split to ws\n");
1047 con_attach(new, con, false);
1050 con_focus(old_focused);
1052 tree_flatten(croot);
1057 con->layout = layout;
1061 * Callback which will be called when removing a child from the given con.
1062 * Kills the container if it is empty and replaces it with the child if there
1063 * is exactly one child.
1066 static void con_on_remove_child(Con *con) {
1067 DLOG("on_remove_child\n");
1069 /* Every container 'above' (in the hierarchy) the workspace content should
1070 * not be closed when the last child was removed */
1071 if (con->type == CT_OUTPUT ||
1072 con->type == CT_ROOT ||
1073 con->type == CT_DOCKAREA) {
1074 DLOG("not handling, type = %d\n", con->type);
1078 /* For workspaces, close them only if they're not visible anymore */
1079 if (con->type == CT_WORKSPACE) {
1080 if (TAILQ_EMPTY(&(con->focus_head)) && !workspace_is_visible(con)) {
1081 LOG("Closing old workspace (%p / %s), it is empty\n", con, con->name);
1082 tree_close(con, DONT_KILL_WINDOW, false, false);
1083 ipc_send_event("workspace", I3_IPC_EVENT_WORKSPACE, "{\"change\":\"empty\"}");
1088 /* TODO: check if this container would swallow any other client and
1089 * don’t close it automatically. */
1090 int children = con_num_children(con);
1091 if (children == 0) {
1092 DLOG("Container empty, closing\n");
1093 tree_close(con, DONT_KILL_WINDOW, false, false);
1099 * Determines the minimum size of the given con by looking at its children (for
1100 * split/stacked/tabbed cons). Will be called when resizing floating cons
1103 Rect con_minimum_size(Con *con) {
1104 DLOG("Determining minimum size for con %p\n", con);
1106 if (con_is_leaf(con)) {
1107 DLOG("leaf node, returning 75x50\n");
1108 return (Rect){ 0, 0, 75, 50 };
1111 if (con->type == CT_FLOATING_CON) {
1112 DLOG("floating con\n");
1113 Con *child = TAILQ_FIRST(&(con->nodes_head));
1114 return con_minimum_size(child);
1117 if (con->layout == L_STACKED || con->layout == L_TABBED) {
1118 uint32_t max_width = 0, max_height = 0, deco_height = 0;
1120 TAILQ_FOREACH(child, &(con->nodes_head), nodes) {
1121 Rect min = con_minimum_size(child);
1122 deco_height += child->deco_rect.height;
1123 max_width = max(max_width, min.width);
1124 max_height = max(max_height, min.height);
1126 DLOG("stacked/tabbed now, returning %d x %d + deco_rect = %d\n",
1127 max_width, max_height, deco_height);
1128 return (Rect){ 0, 0, max_width, max_height + deco_height };
1131 /* For horizontal/vertical split containers we sum up the width (h-split)
1132 * or height (v-split) and use the maximum of the height (h-split) or width
1133 * (v-split) as minimum size. */
1134 if (con->orientation == HORIZ || con->orientation == VERT) {
1135 uint32_t width = 0, height = 0;
1137 TAILQ_FOREACH(child, &(con->nodes_head), nodes) {
1138 Rect min = con_minimum_size(child);
1139 if (con->orientation == HORIZ) {
1141 height = max(height, min.height);
1143 height += min.height;
1144 width = max(width, min.width);
1147 DLOG("split container, returning width = %d x height = %d\n", width, height);
1148 return (Rect){ 0, 0, width, height };
1151 ELOG("Unhandled case, type = %d, layout = %d, orientation = %d\n",
1152 con->type, con->layout, con->orientation);
1157 * Returns true if changing the focus to con would be allowed considering
1158 * the fullscreen focus constraints. Specifically, if a fullscreen container or
1159 * any of its descendants is focused, this function returns true if and only if
1160 * focusing con would mean that focus would still be visible on screen, i.e.,
1161 * the newly focused container would not be obscured by a fullscreen container.
1163 * In the simplest case, if a fullscreen container or any of its descendants is
1164 * fullscreen, this functions returns true if con is the fullscreen container
1165 * itself or any of its descendants, as this means focus wouldn't escape the
1166 * boundaries of the fullscreen container.
1168 * In case the fullscreen container is of type CF_OUTPUT, this function returns
1169 * true if con is on a different workspace, as focus wouldn't be obscured by
1170 * the fullscreen container that is constrained to a different workspace.
1172 * Note that this same logic can be applied to moving containers. If a
1173 * container can be focused under the fullscreen focus constraints, it can also
1174 * become a parent or sibling to the currently focused container.
1177 bool con_fullscreen_permits_focusing(Con *con) {
1178 /* No focus, no problem. */
1182 /* Find the first fullscreen ascendent. */
1184 while (fs && fs->fullscreen_mode == CF_NONE)
1187 /* The most common case is we hit the workspace level. In this
1188 * situation, changing focus is also harmless. */
1189 assert(fs->fullscreen_mode != CF_NONE);
1190 if (fs->type == CT_WORKSPACE)
1193 /* Allow it if the container itself is the fullscreen container. */
1197 /* If fullscreen is per-output, the focus being in a different workspace is
1198 * sufficient to guarantee that change won't leave fullscreen in bad shape. */
1199 if (fs->fullscreen_mode == CF_OUTPUT &&
1200 con_get_workspace(con) != con_get_workspace(fs)) {
1204 /* Allow it only if the container to be focused is contained within the
1205 * current fullscreen container. */
1207 if (con->parent == fs)
1212 /* Focusing con would hide it behind a fullscreen window, disallow it. */