2 * vim:ts=4:sw=4:expandtab
4 * i3 - an improved dynamic tiling window manager
5 * © 2009-2010 Michael Stapelberg and contributors (see also: LICENSE)
7 * con.c contains all functions which deal with containers directly (creating
8 * containers, searching containers, getting specific properties from
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)
55 TAILQ_INIT(&(new->floating_head));
56 TAILQ_INIT(&(new->nodes_head));
57 TAILQ_INIT(&(new->focus_head));
58 TAILQ_INIT(&(new->swallow_head));
61 con_attach(new, parent, false);
67 * Attaches the given container to the given parent. This happens when moving
68 * a container or when inserting a new container at a specific place in the
71 * ignore_focus is to just insert the Con at the end (useful when creating a
72 * new split container *around* some containers, that is, detaching and
73 * attaching them in order without wanting to mess with the focus in between).
76 void con_attach(Con *con, Con *parent, bool ignore_focus) {
80 struct nodes_head *nodes_head = &(parent->nodes_head);
81 struct focus_head *focus_head = &(parent->focus_head);
83 /* Workspaces are handled differently: they need to be inserted at the
85 if (con->type == CT_WORKSPACE) {
86 DLOG("it's a workspace. num = %d\n", con->num);
87 if (con->num == -1 || TAILQ_EMPTY(nodes_head)) {
88 TAILQ_INSERT_TAIL(nodes_head, con, nodes);
90 current = TAILQ_FIRST(nodes_head);
91 if (con->num < current->num) {
92 /* we need to insert the container at the beginning */
93 TAILQ_INSERT_HEAD(nodes_head, con, nodes);
95 while (current->num != -1 && con->num > current->num) {
96 current = TAILQ_NEXT(current, nodes);
97 if (current == TAILQ_END(nodes_head)) {
102 /* we need to insert con after current, if current is not NULL */
104 TAILQ_INSERT_BEFORE(current, con, nodes);
105 else TAILQ_INSERT_TAIL(nodes_head, con, nodes);
108 goto add_to_focus_head;
111 if (con->type == CT_FLOATING_CON) {
112 DLOG("Inserting into floating containers\n");
113 TAILQ_INSERT_TAIL(&(parent->floating_head), con, floating_windows);
116 /* Get the first tiling container in focus stack */
117 TAILQ_FOREACH(loop, &(parent->focus_head), focused) {
118 if (loop->type == CT_FLOATING_CON)
125 /* When the container is not a split container (but contains a window)
126 * and is attached to a workspace, we check if the user configured a
127 * workspace_layout. This is done in workspace_attach_to, which will
128 * provide us with the container to which we should attach (either the
129 * workspace or a new split container with the configured
132 if (con->window != NULL && parent->type == CT_WORKSPACE) {
133 DLOG("Parent is a workspace. Applying default layout...\n");
134 Con *target = workspace_attach_to(parent);
136 /* Attach the original con to this new split con instead */
137 nodes_head = &(target->nodes_head);
138 focus_head = &(target->focus_head);
139 con->parent = target;
145 /* Insert the container after the tiling container, if found.
146 * When adding to a CT_OUTPUT, just append one after another. */
147 if (current && parent->type != CT_OUTPUT) {
148 DLOG("Inserting con = %p after last focused tiling con %p\n",
150 TAILQ_INSERT_AFTER(nodes_head, current, con, nodes);
151 } else TAILQ_INSERT_TAIL(nodes_head, con, nodes);
155 /* We insert to the TAIL because con_focus() will correct this.
156 * This way, we have the option to insert Cons without having
158 TAILQ_INSERT_TAIL(focus_head, con, focused);
162 * Detaches the given container from its current parent
165 void con_detach(Con *con) {
166 if (con->type == CT_FLOATING_CON) {
167 TAILQ_REMOVE(&(con->parent->floating_head), con, floating_windows);
168 TAILQ_REMOVE(&(con->parent->focus_head), con, focused);
170 TAILQ_REMOVE(&(con->parent->nodes_head), con, nodes);
171 TAILQ_REMOVE(&(con->parent->focus_head), con, focused);
176 * Sets input focus to the given container. Will be updated in X11 in the next
177 * run of x_push_changes().
180 void con_focus(Con *con) {
182 DLOG("con_focus = %p\n", con);
184 /* 1: set focused-pointer to the new con */
185 /* 2: exchange the position of the container in focus stack of the parent all the way up */
186 TAILQ_REMOVE(&(con->parent->focus_head), con, focused);
187 TAILQ_INSERT_HEAD(&(con->parent->focus_head), con, focused);
188 if (con->parent->parent != NULL)
189 con_focus(con->parent);
194 workspace_update_urgent_flag(con_get_workspace(con));
196 DLOG("con_focus done = %p\n", con);
200 * Returns true when this node is a leaf node (has no children)
203 bool con_is_leaf(Con *con) {
204 return TAILQ_EMPTY(&(con->nodes_head));
208 * Returns true if this node accepts a window (if the node swallows windows,
209 * it might already have swallowed enough and cannot hold any more).
212 bool con_accepts_window(Con *con) {
213 /* 1: workspaces never accept direct windows */
214 if (con->type == CT_WORKSPACE)
217 if (con->orientation != NO_ORIENTATION) {
218 DLOG("container %p does not accepts windows, orientation != NO_ORIENTATION\n", con);
222 /* TODO: if this is a swallowing container, we need to check its max_clients */
223 return (con->window == NULL);
227 * Gets the output container (first container with CT_OUTPUT in hierarchy) this
231 Con *con_get_output(Con *con) {
233 while (result != NULL && result->type != CT_OUTPUT)
234 result = result->parent;
235 /* We must be able to get an output because focus can never be set higher
236 * in the tree (root node cannot be focused). */
237 assert(result != NULL);
242 * Gets the workspace container this node is on.
245 Con *con_get_workspace(Con *con) {
247 while (result != NULL && result->type != CT_WORKSPACE)
248 result = result->parent;
253 * Searches parenst of the given 'con' until it reaches one with the specified
254 * 'orientation'. Aborts when it comes across a floating_con.
257 Con *con_parent_with_orientation(Con *con, orientation_t orientation) {
258 DLOG("Searching for parent of Con %p with orientation %d\n", con, orientation);
259 Con *parent = con->parent;
260 if (parent->type == CT_FLOATING_CON)
262 while (con_orientation(parent) != orientation) {
263 DLOG("Need to go one level further up\n");
264 parent = parent->parent;
265 /* Abort when we reach a floating con */
266 if (parent && parent->type == CT_FLOATING_CON)
271 DLOG("Result: %p\n", parent);
276 * helper data structure for the breadth-first-search in
277 * con_get_fullscreen_con()
283 TAILQ_ENTRY(bfs_entry) entries;
287 * Returns the first fullscreen node below this node.
290 Con *con_get_fullscreen_con(Con *con, int fullscreen_mode) {
291 Con *current, *child;
293 /* TODO: is breadth-first-search really appropriate? (check as soon as
294 * fullscreen levels and fullscreen for containers is implemented) */
295 TAILQ_HEAD(bfs_head, bfs_entry) bfs_head = TAILQ_HEAD_INITIALIZER(bfs_head);
296 struct bfs_entry *entry = smalloc(sizeof(struct bfs_entry));
298 TAILQ_INSERT_TAIL(&bfs_head, entry, entries);
300 while (!TAILQ_EMPTY(&bfs_head)) {
301 entry = TAILQ_FIRST(&bfs_head);
302 current = entry->con;
303 if (current != con && current->fullscreen_mode == fullscreen_mode) {
304 /* empty the queue */
305 while (!TAILQ_EMPTY(&bfs_head)) {
306 entry = TAILQ_FIRST(&bfs_head);
307 TAILQ_REMOVE(&bfs_head, entry, entries);
313 TAILQ_REMOVE(&bfs_head, entry, entries);
316 TAILQ_FOREACH(child, &(current->nodes_head), nodes) {
317 entry = smalloc(sizeof(struct bfs_entry));
319 TAILQ_INSERT_TAIL(&bfs_head, entry, entries);
322 TAILQ_FOREACH(child, &(current->floating_head), floating_windows) {
323 entry = smalloc(sizeof(struct bfs_entry));
325 TAILQ_INSERT_TAIL(&bfs_head, entry, entries);
333 * Returns true if the node is floating.
336 bool con_is_floating(Con *con) {
338 DLOG("checking if con %p is floating\n", con);
339 return (con->floating >= FLOATING_AUTO_ON);
343 * Checks if the given container is either floating or inside some floating
344 * container. It returns the FLOATING_CON container.
347 Con *con_inside_floating(Con *con) {
349 if (con->type == CT_FLOATING_CON)
352 if (con->floating >= FLOATING_AUTO_ON)
355 if (con->type == CT_WORKSPACE || con->type == CT_OUTPUT)
358 return con_inside_floating(con->parent);
362 * Returns the container with the given client window ID or NULL if no such
366 Con *con_by_window_id(xcb_window_t window) {
368 TAILQ_FOREACH(con, &all_cons, all_cons)
369 if (con->window != NULL && con->window->id == window)
375 * Returns the container with the given frame ID or NULL if no such container
379 Con *con_by_frame_id(xcb_window_t frame) {
381 TAILQ_FOREACH(con, &all_cons, all_cons)
382 if (con->frame == frame)
388 * Returns the first container below 'con' which wants to swallow this window
392 Con *con_for_window(Con *con, i3Window *window, Match **store_match) {
395 DLOG("searching con for window %p starting at con %p\n", window, con);
396 DLOG("class == %s\n", window->class_class);
398 TAILQ_FOREACH(child, &(con->nodes_head), nodes) {
399 TAILQ_FOREACH(match, &(child->swallow_head), matches) {
400 if (!match_matches_window(match, window))
402 if (store_match != NULL)
403 *store_match = match;
406 Con *result = con_for_window(child, window, store_match);
411 TAILQ_FOREACH(child, &(con->floating_head), floating_windows) {
412 TAILQ_FOREACH(match, &(child->swallow_head), matches) {
413 if (!match_matches_window(match, window))
415 if (store_match != NULL)
416 *store_match = match;
419 Con *result = con_for_window(child, window, store_match);
428 * Returns the number of children of this container.
431 int con_num_children(Con *con) {
435 TAILQ_FOREACH(child, &(con->nodes_head), nodes)
442 * Updates the percent attribute of the children of the given container. This
443 * function needs to be called when a window is added or removed from a
447 void con_fix_percent(Con *con) {
449 int children = con_num_children(con);
451 // calculate how much we have distributed and how many containers
452 // with a percentage set we have
454 int children_with_percent = 0;
455 TAILQ_FOREACH(child, &(con->nodes_head), nodes) {
456 if (child->percent > 0.0) {
457 total += child->percent;
458 ++children_with_percent;
462 // if there were children without a percentage set, set to a value that
463 // will make those children proportional to all others
464 if (children_with_percent != children) {
465 TAILQ_FOREACH(child, &(con->nodes_head), nodes) {
466 if (child->percent <= 0.0) {
467 if (children_with_percent == 0)
468 total += (child->percent = 1.0);
469 else total += (child->percent = total / children_with_percent);
474 // if we got a zero, just distribute the space equally, otherwise
475 // distribute according to the proportions we got
477 TAILQ_FOREACH(child, &(con->nodes_head), nodes)
478 child->percent = 1.0 / children;
479 } else if (total != 1.0) {
480 TAILQ_FOREACH(child, &(con->nodes_head), nodes)
481 child->percent /= total;
486 * Toggles fullscreen mode for the given container. Fullscreen mode will not be
487 * entered when there already is a fullscreen container on this workspace.
490 void con_toggle_fullscreen(Con *con, int fullscreen_mode) {
491 Con *workspace, *fullscreen;
493 if (con->type == CT_WORKSPACE) {
494 DLOG("You cannot make a workspace fullscreen.\n");
498 DLOG("toggling fullscreen for %p / %s\n", con, con->name);
499 if (con->fullscreen_mode == CF_NONE) {
500 /* 1: check if there already is a fullscreen con */
501 if (fullscreen_mode == CF_GLOBAL)
502 fullscreen = con_get_fullscreen_con(croot, CF_GLOBAL);
504 workspace = con_get_workspace(con);
505 fullscreen = con_get_fullscreen_con(workspace, CF_OUTPUT);
507 if (fullscreen != NULL) {
508 LOG("Not entering fullscreen mode, container (%p/%s) "
509 "already is in fullscreen mode\n",
510 fullscreen, fullscreen->name);
511 goto update_netwm_state;
514 /* 2: enable fullscreen */
515 con->fullscreen_mode = fullscreen_mode;
517 /* 1: disable fullscreen */
518 con->fullscreen_mode = CF_NONE;
522 DLOG("mode now: %d\n", con->fullscreen_mode);
524 /* update _NET_WM_STATE if this container has a window */
525 /* TODO: when a window is assigned to a container which is already
526 * fullscreened, this state needs to be pushed to the client, too */
527 if (con->window == NULL)
531 unsigned int num = 0;
533 if (con->fullscreen_mode != CF_NONE)
534 values[num++] = A__NET_WM_STATE_FULLSCREEN;
536 xcb_change_property(conn, XCB_PROP_MODE_REPLACE, con->window->id,
537 A__NET_WM_STATE, XCB_ATOM_ATOM, 32, num, values);
541 * Moves the given container to the currently focused container on the given
544 * The dont_warp flag disables pointer warping and will be set when this
545 * function is called while dragging a floating window.
547 * TODO: is there a better place for this function?
550 void con_move_to_workspace(Con *con, Con *workspace, bool dont_warp) {
551 if (con->type == CT_WORKSPACE) {
552 DLOG("Moving workspaces is not yet implemented.\n");
556 if (con_is_floating(con)) {
557 DLOG("Using FLOATINGCON instead\n");
561 Con *source_output = con_get_output(con),
562 *dest_output = con_get_output(workspace);
564 /* 1: save the container which is going to be focused after the current
565 * container is moved away */
566 Con *focus_next = con_next_focused(con);
568 /* 2: get the focused container of this workspace */
569 Con *next = con_descend_focused(workspace);
571 /* 3: we go up one level, but only when next is a normal container */
572 if (next->type != CT_WORKSPACE) {
573 DLOG("next originally = %p / %s / type %d\n", next, next->name, next->type);
577 /* 4: if the target container is floating, we get the workspace instead.
578 * Only tiling windows need to get inserted next to the current container.
580 Con *floatingcon = con_inside_floating(next);
581 if (floatingcon != NULL) {
582 DLOG("floatingcon, going up even further\n");
583 next = floatingcon->parent;
586 if (con->type == CT_FLOATING_CON) {
587 Con *ws = con_get_workspace(next);
588 DLOG("This is a floating window, using workspace %p / %s\n", ws, ws->name);
592 /* If moving to a visible workspace, call show so it can be considered
593 * focused. Must do before attaching because workspace_show checks to see
594 * if focused container is in its area. */
595 if (source_output != dest_output &&
596 workspace_is_visible(workspace)) {
597 workspace_show(workspace->name);
599 if (con->type == CT_FLOATING_CON) {
600 DLOG("Floating window, fixing coordinates\n");
601 /* Take the relative coordinates of the current output, then add them
602 * to the coordinate space of the correct output */
603 uint32_t rel_x = (con->rect.x - source_output->rect.x);
604 uint32_t rel_y = (con->rect.y - source_output->rect.y);
605 con->rect.x = dest_output->rect.x + rel_x;
606 con->rect.y = dest_output->rect.y + rel_y;
609 /* Don’t warp if told so (when dragging floating windows with the
610 * mouse for example) */
614 x_set_warp_to(&(con->rect));
617 DLOG("Re-attaching container to %p / %s\n", next, next->name);
618 /* 5: re-attach the con to the parent of this focused container */
619 Con *parent = con->parent;
621 con_attach(con, next, false);
623 /* 6: fix the percentages */
624 con_fix_percent(parent);
626 con_fix_percent(next);
628 /* 7: focus the con on the target workspace (the X focus is only updated by
629 * calling tree_render(), so for the "real" focus this is a no-op). */
630 con_focus(con_descend_focused(con));
632 /* 8: when moving to a visible workspace on a different output, we keep the
633 * con focused. Otherwise, we leave the focus on the current workspace as we
634 * don’t want to focus invisible workspaces */
635 if (source_output != dest_output &&
636 workspace_is_visible(workspace)) {
637 DLOG("Moved to a different output, focusing target\n");
639 /* Descend focus stack in case focus_next is a workspace which can
640 * occur if we move to the same workspace. Also show current workspace
641 * to ensure it is focused. */
642 workspace_show(con_get_workspace(focus_next)->name);
643 con_focus(con_descend_focused(focus_next));
646 CALL(parent, on_remove_child);
650 * Returns the orientation of the given container (for stacked containers,
651 * vertical orientation is used regardless of the actual orientation of the
655 int con_orientation(Con *con) {
656 /* stacking containers behave like they are in vertical orientation */
657 if (con->layout == L_STACKED)
660 if (con->layout == L_TABBED)
663 return con->orientation;
667 * Returns the container which will be focused next when the given container
668 * is not available anymore. Called in tree_close and con_move_to_workspace
669 * to properly restore focus.
672 Con *con_next_focused(Con *con) {
674 /* floating containers are attached to a workspace, so we focus either the
675 * next floating container (if any) or the workspace itself. */
676 if (con->type == CT_FLOATING_CON) {
677 DLOG("selecting next for CT_FLOATING_CON\n");
678 next = TAILQ_NEXT(con, floating_windows);
679 DLOG("next = %p\n", next);
681 next = TAILQ_PREV(con, floating_head, floating_windows);
682 DLOG("using prev, next = %p\n", next);
685 Con *ws = con_get_workspace(con);
687 DLOG("no more floating containers for next = %p, restoring workspace focus\n", next);
688 while (next != TAILQ_END(&(ws->focus_head)) && !TAILQ_EMPTY(&(next->focus_head))) {
689 next = TAILQ_FIRST(&(next->focus_head));
691 DLOG("skipping container itself, we want the next client\n");
692 next = TAILQ_NEXT(next, focused);
695 if (next == TAILQ_END(&(ws->focus_head))) {
696 DLOG("Focus list empty, returning ws\n");
700 /* Instead of returning the next CT_FLOATING_CON, we descend it to
701 * get an actual window to focus. */
702 next = con_descend_focused(next);
707 /* dock clients cannot be focused, so we focus the workspace instead */
708 if (con->parent->type == CT_DOCKAREA) {
709 DLOG("selecting workspace for dock client\n");
710 return con_descend_focused(output_get_content(con->parent->parent));
713 /* if 'con' is not the first entry in the focus stack, use the first one as
714 * it’s currently focused already */
715 Con *first = TAILQ_FIRST(&(con->parent->focus_head));
717 DLOG("Using first entry %p\n", first);
720 /* try to focus the next container on the same level as this one or fall
721 * back to its parent */
722 if (!(next = TAILQ_NEXT(con, focused)))
726 /* now go down the focus stack as far as
727 * possible, excluding the current container */
728 while (!TAILQ_EMPTY(&(next->focus_head)) &&
729 TAILQ_FIRST(&(next->focus_head)) != con)
730 next = TAILQ_FIRST(&(next->focus_head));
736 * Get the next/previous container in the specified orientation. This may
737 * travel up until it finds a container with suitable orientation.
740 Con *con_get_next(Con *con, char way, orientation_t orientation) {
741 DLOG("con_get_next(way=%c, orientation=%d)\n", way, orientation);
742 /* 1: get the first parent with the same orientation */
744 while (con_orientation(cur->parent) != orientation) {
745 DLOG("need to go one level further up\n");
746 if (cur->parent->type == CT_WORKSPACE) {
747 LOG("that's a workspace, we can't go further up\n");
753 /* 2: chose next (or previous) */
756 next = TAILQ_NEXT(cur, nodes);
757 /* if we are at the end of the list, we need to wrap */
758 if (next == TAILQ_END(&(parent->nodes_head)))
761 next = TAILQ_PREV(cur, nodes_head, nodes);
762 /* if we are at the end of the list, we need to wrap */
763 if (next == TAILQ_END(&(cur->nodes_head)))
766 DLOG("next = %p\n", next);
772 * Returns the focused con inside this client, descending the tree as far as
773 * possible. This comes in handy when attaching a con to a workspace at the
774 * currently focused position, for example.
777 Con *con_descend_focused(Con *con) {
779 while (!TAILQ_EMPTY(&(next->focus_head)))
780 next = TAILQ_FIRST(&(next->focus_head));
785 * Returns the focused con inside this client, descending the tree as far as
786 * possible. This comes in handy when attaching a con to a workspace at the
787 * currently focused position, for example.
789 * Works like con_descend_focused but considers only tiling cons.
792 Con *con_descend_tiling_focused(Con *con) {
798 TAILQ_FOREACH(child, &(next->focus_head), focused) {
799 if (child->type == CT_FLOATING_CON)
805 } while (before != next);
810 * Returns the leftmost, rightmost, etc. container in sub-tree. For example, if
811 * direction is D_LEFT, then we return the rightmost container and if direction
812 * is D_RIGHT, we return the leftmost container. This is because if we are
813 * moving D_LEFT, and thus want the rightmost container.
816 Con *con_descend_direction(Con *con, direction_t direction) {
818 DLOG("con_descend_direction(%p, %d)\n", con, direction);
819 if (direction == D_LEFT || direction == D_RIGHT) {
820 if (con->orientation == HORIZ) {
821 /* If the direction is horizontal, we can use either the first
822 * (D_RIGHT) or the last con (D_LEFT) */
823 if (direction == D_RIGHT)
824 most = TAILQ_FIRST(&(con->nodes_head));
825 else most = TAILQ_LAST(&(con->nodes_head), nodes_head);
826 } else if (con->orientation == VERT) {
827 /* Wrong orientation. We use the last focused con. Within that con,
828 * we recurse to chose the left/right con or at least the last
830 most = TAILQ_FIRST(&(con->focus_head));
832 /* If the con has no orientation set, it’s not a split container
833 * but a container with a client window, so stop recursing */
838 if (direction == D_UP || direction == D_DOWN) {
839 if (con->orientation == VERT) {
840 /* If the direction is vertical, we can use either the first
841 * (D_DOWN) or the last con (D_UP) */
842 if (direction == D_UP)
843 most = TAILQ_LAST(&(con->nodes_head), nodes_head);
844 else most = TAILQ_FIRST(&(con->nodes_head));
845 } else if (con->orientation == HORIZ) {
846 /* Wrong orientation. We use the last focused con. Within that con,
847 * we recurse to chose the top/bottom con or at least the last
849 most = TAILQ_FIRST(&(con->focus_head));
851 /* If the con has no orientation set, it’s not a split container
852 * but a container with a client window, so stop recursing */
859 return con_descend_direction(most, direction);
863 * Returns a "relative" Rect which contains the amount of pixels that need to
864 * be added to the original Rect to get the final position (obviously the
865 * amount of pixels for normal, 1pixel and borderless are different).
868 Rect con_border_style_rect(Con *con) {
869 switch (con_border_style(con)) {
871 return (Rect){2, 0, -(2 * 2), -2};
874 return (Rect){1, 1, -2, -2};
877 return (Rect){0, 0, 0, 0};
885 * Use this function to get a container’s border style. This is important
886 * because when inside a stack, the border style is always BS_NORMAL.
887 * For tabbed mode, the same applies, with one exception: when the container is
888 * borderless and the only element in the tabbed container, the border is not
891 * For children of a CT_DOCKAREA, the border style is always none.
894 int con_border_style(Con *con) {
895 Con *fs = con_get_fullscreen_con(con->parent, CF_OUTPUT);
897 DLOG("this one is fullscreen! overriding BS_NONE\n");
901 if (con->parent->layout == L_STACKED)
902 return (con_num_children(con->parent) == 1 ? con->border_style : BS_NORMAL);
904 if (con->parent->layout == L_TABBED && con->border_style != BS_NORMAL)
905 return (con_num_children(con->parent) == 1 ? con->border_style : BS_NORMAL);
907 if (con->parent->type == CT_DOCKAREA)
910 return con->border_style;
914 * This function changes the layout of a given container. Use it to handle
915 * special cases like changing a whole workspace to stacked/tabbed (creates a
916 * new split container before).
919 void con_set_layout(Con *con, int layout) {
920 /* When the container type is CT_WORKSPACE, the user wants to change the
921 * whole workspace into stacked/tabbed mode. To do this and still allow
922 * intuitive operations (like level-up and then opening a new window), we
923 * need to create a new split container. */
924 if (con->type == CT_WORKSPACE) {
925 DLOG("Creating new split container\n");
926 /* 1: create a new split container */
927 Con *new = con_new(NULL, NULL);
930 /* 2: set the requested layout on the split con */
931 new->layout = layout;
933 /* 3: While the layout is irrelevant in stacked/tabbed mode, it needs
934 * to be set. Otherwise, this con will not be interpreted as a split
936 if (config.default_orientation == NO_ORIENTATION) {
937 new->orientation = (con->rect.height > con->rect.width) ? VERT : HORIZ;
939 new->orientation = config.default_orientation;
942 Con *old_focused = TAILQ_FIRST(&(con->focus_head));
943 if (old_focused == TAILQ_END(&(con->focus_head)))
946 /* 4: move the existing cons of this workspace below the new con */
947 DLOG("Moving cons\n");
949 while (!TAILQ_EMPTY(&(con->nodes_head))) {
950 child = TAILQ_FIRST(&(con->nodes_head));
952 con_attach(child, new, true);
955 /* 4: attach the new split container to the workspace */
956 DLOG("Attaching new split to ws\n");
957 con_attach(new, con, false);
960 con_focus(old_focused);
967 con->layout = layout;
971 * Callback which will be called when removing a child from the given con.
972 * Kills the container if it is empty and replaces it with the child if there
973 * is exactly one child.
976 static void con_on_remove_child(Con *con) {
977 DLOG("on_remove_child\n");
979 /* Every container 'above' (in the hierarchy) the workspace content should
980 * not be closed when the last child was removed */
981 if (con->type == CT_WORKSPACE ||
982 con->type == CT_OUTPUT ||
983 con->type == CT_ROOT ||
984 con->type == CT_DOCKAREA) {
985 DLOG("not handling, type = %d\n", con->type);
989 /* TODO: check if this container would swallow any other client and
990 * don’t close it automatically. */
991 int children = con_num_children(con);
993 DLOG("Container empty, closing\n");
994 tree_close(con, DONT_KILL_WINDOW, false);
1000 * Determines the minimum size of the given con by looking at its children (for
1001 * split/stacked/tabbed cons). Will be called when resizing floating cons
1004 Rect con_minimum_size(Con *con) {
1005 DLOG("Determining minimum size for con %p\n", con);
1007 if (con_is_leaf(con)) {
1008 DLOG("leaf node, returning 75x50\n");
1009 return (Rect){ 0, 0, 75, 50 };
1012 if (con->type == CT_FLOATING_CON) {
1013 DLOG("floating con\n");
1014 Con *child = TAILQ_FIRST(&(con->nodes_head));
1015 return con_minimum_size(child);
1018 if (con->layout == L_STACKED || con->layout == L_TABBED) {
1019 uint32_t max_width = 0, max_height = 0, deco_height = 0;
1021 TAILQ_FOREACH(child, &(con->nodes_head), nodes) {
1022 Rect min = con_minimum_size(child);
1023 deco_height += child->deco_rect.height;
1024 max_width = max(max_width, min.width);
1025 max_height = max(max_height, min.height);
1027 DLOG("stacked/tabbed now, returning %d x %d + deco_rect = %d\n",
1028 max_width, max_height, deco_height);
1029 return (Rect){ 0, 0, max_width, max_height + deco_height };
1032 /* For horizontal/vertical split containers we sum up the width (h-split)
1033 * or height (v-split) and use the maximum of the height (h-split) or width
1034 * (v-split) as minimum size. */
1035 if (con->orientation == HORIZ || con->orientation == VERT) {
1036 uint32_t width = 0, height = 0;
1038 TAILQ_FOREACH(child, &(con->nodes_head), nodes) {
1039 Rect min = con_minimum_size(child);
1040 if (con->orientation == HORIZ) {
1042 height = max(height, min.height);
1044 height += min.height;
1045 width = max(width, min.width);
1048 DLOG("split container, returning width = %d x height = %d\n", width, height);
1049 return (Rect){ 0, 0, width, height };
1052 ELOG("Unhandled case, type = %d, layout = %d, orientation = %d\n",
1053 con->type, con->layout, con->orientation);