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)
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));
199 * Returns true when this node is a leaf node (has no children)
202 bool con_is_leaf(Con *con) {
203 return TAILQ_EMPTY(&(con->nodes_head));
207 * Returns true if this node accepts a window (if the node swallows windows,
208 * it might already have swallowed enough and cannot hold any more).
211 bool con_accepts_window(Con *con) {
212 /* 1: workspaces never accept direct windows */
213 if (con->type == CT_WORKSPACE)
216 if (con->orientation != NO_ORIENTATION) {
217 DLOG("container %p does not accepts windows, orientation != NO_ORIENTATION\n", con);
221 /* TODO: if this is a swallowing container, we need to check its max_clients */
222 return (con->window == NULL);
226 * Gets the output container (first container with CT_OUTPUT in hierarchy) this
230 Con *con_get_output(Con *con) {
232 while (result != NULL && result->type != CT_OUTPUT)
233 result = result->parent;
234 /* We must be able to get an output because focus can never be set higher
235 * in the tree (root node cannot be focused). */
236 assert(result != NULL);
241 * Gets the workspace container this node is on.
244 Con *con_get_workspace(Con *con) {
246 while (result != NULL && result->type != CT_WORKSPACE)
247 result = result->parent;
252 * Searches parenst of the given 'con' until it reaches one with the specified
253 * 'orientation'. Aborts when it comes across a floating_con.
256 Con *con_parent_with_orientation(Con *con, orientation_t orientation) {
257 DLOG("Searching for parent of Con %p with orientation %d\n", con, orientation);
258 Con *parent = con->parent;
259 if (parent->type == CT_FLOATING_CON)
261 while (con_orientation(parent) != orientation) {
262 DLOG("Need to go one level further up\n");
263 parent = parent->parent;
264 /* Abort when we reach a floating con */
265 if (parent && parent->type == CT_FLOATING_CON)
270 DLOG("Result: %p\n", parent);
275 * helper data structure for the breadth-first-search in
276 * con_get_fullscreen_con()
282 TAILQ_ENTRY(bfs_entry) entries;
286 * Returns the first fullscreen node below this node.
289 Con *con_get_fullscreen_con(Con *con, int fullscreen_mode) {
290 Con *current, *child;
292 /* TODO: is breadth-first-search really appropriate? (check as soon as
293 * fullscreen levels and fullscreen for containers is implemented) */
294 TAILQ_HEAD(bfs_head, bfs_entry) bfs_head = TAILQ_HEAD_INITIALIZER(bfs_head);
295 struct bfs_entry *entry = smalloc(sizeof(struct bfs_entry));
297 TAILQ_INSERT_TAIL(&bfs_head, entry, entries);
299 while (!TAILQ_EMPTY(&bfs_head)) {
300 entry = TAILQ_FIRST(&bfs_head);
301 current = entry->con;
302 if (current != con && current->fullscreen_mode == fullscreen_mode) {
303 /* empty the queue */
304 while (!TAILQ_EMPTY(&bfs_head)) {
305 entry = TAILQ_FIRST(&bfs_head);
306 TAILQ_REMOVE(&bfs_head, entry, entries);
312 TAILQ_REMOVE(&bfs_head, entry, entries);
315 TAILQ_FOREACH(child, &(current->nodes_head), nodes) {
316 entry = smalloc(sizeof(struct bfs_entry));
318 TAILQ_INSERT_TAIL(&bfs_head, entry, entries);
321 TAILQ_FOREACH(child, &(current->floating_head), floating_windows) {
322 entry = smalloc(sizeof(struct bfs_entry));
324 TAILQ_INSERT_TAIL(&bfs_head, entry, entries);
332 * Returns true if the node is floating.
335 bool con_is_floating(Con *con) {
337 DLOG("checking if con %p is floating\n", con);
338 return (con->floating >= FLOATING_AUTO_ON);
342 * Checks if the given container is either floating or inside some floating
343 * container. It returns the FLOATING_CON container.
346 Con *con_inside_floating(Con *con) {
348 if (con->type == CT_FLOATING_CON)
351 if (con->floating >= FLOATING_AUTO_ON)
354 if (con->type == CT_WORKSPACE || con->type == CT_OUTPUT)
357 return con_inside_floating(con->parent);
361 * Checks if the given container is inside a focused container.
364 bool con_inside_focused(Con *con) {
369 return con_inside_focused(con->parent);
373 * Returns the container with the given client window ID or NULL if no such
377 Con *con_by_window_id(xcb_window_t window) {
379 TAILQ_FOREACH(con, &all_cons, all_cons)
380 if (con->window != NULL && con->window->id == window)
386 * Returns the container with the given frame ID or NULL if no such container
390 Con *con_by_frame_id(xcb_window_t frame) {
392 TAILQ_FOREACH(con, &all_cons, all_cons)
393 if (con->frame == frame)
399 * Returns the first container below 'con' which wants to swallow this window
403 Con *con_for_window(Con *con, i3Window *window, Match **store_match) {
406 //DLOG("searching con for window %p starting at con %p\n", window, con);
407 //DLOG("class == %s\n", window->class_class);
409 TAILQ_FOREACH(child, &(con->nodes_head), nodes) {
410 TAILQ_FOREACH(match, &(child->swallow_head), matches) {
411 if (!match_matches_window(match, window))
413 if (store_match != NULL)
414 *store_match = match;
417 Con *result = con_for_window(child, window, store_match);
422 TAILQ_FOREACH(child, &(con->floating_head), floating_windows) {
423 TAILQ_FOREACH(match, &(child->swallow_head), matches) {
424 if (!match_matches_window(match, window))
426 if (store_match != NULL)
427 *store_match = match;
430 Con *result = con_for_window(child, window, store_match);
439 * Returns the number of children of this container.
442 int con_num_children(Con *con) {
446 TAILQ_FOREACH(child, &(con->nodes_head), nodes)
453 * Updates the percent attribute of the children of the given container. This
454 * function needs to be called when a window is added or removed from a
458 void con_fix_percent(Con *con) {
460 int children = con_num_children(con);
462 // calculate how much we have distributed and how many containers
463 // with a percentage set we have
465 int children_with_percent = 0;
466 TAILQ_FOREACH(child, &(con->nodes_head), nodes) {
467 if (child->percent > 0.0) {
468 total += child->percent;
469 ++children_with_percent;
473 // if there were children without a percentage set, set to a value that
474 // will make those children proportional to all others
475 if (children_with_percent != children) {
476 TAILQ_FOREACH(child, &(con->nodes_head), nodes) {
477 if (child->percent <= 0.0) {
478 if (children_with_percent == 0)
479 total += (child->percent = 1.0);
480 else total += (child->percent = total / children_with_percent);
485 // if we got a zero, just distribute the space equally, otherwise
486 // distribute according to the proportions we got
488 TAILQ_FOREACH(child, &(con->nodes_head), nodes)
489 child->percent = 1.0 / children;
490 } else if (total != 1.0) {
491 TAILQ_FOREACH(child, &(con->nodes_head), nodes)
492 child->percent /= total;
497 * Toggles fullscreen mode for the given container. Fullscreen mode will not be
498 * entered when there already is a fullscreen container on this workspace.
501 void con_toggle_fullscreen(Con *con, int fullscreen_mode) {
502 Con *workspace, *fullscreen;
504 if (con->type == CT_WORKSPACE) {
505 DLOG("You cannot make a workspace fullscreen.\n");
509 DLOG("toggling fullscreen for %p / %s\n", con, con->name);
510 if (con->fullscreen_mode == CF_NONE) {
511 /* 1: check if there already is a fullscreen con */
512 if (fullscreen_mode == CF_GLOBAL)
513 fullscreen = con_get_fullscreen_con(croot, CF_GLOBAL);
515 workspace = con_get_workspace(con);
516 fullscreen = con_get_fullscreen_con(workspace, CF_OUTPUT);
518 if (fullscreen != NULL) {
519 LOG("Not entering fullscreen mode, container (%p/%s) "
520 "already is in fullscreen mode\n",
521 fullscreen, fullscreen->name);
522 goto update_netwm_state;
525 /* 2: enable fullscreen */
526 con->fullscreen_mode = fullscreen_mode;
528 /* 1: disable fullscreen */
529 con->fullscreen_mode = CF_NONE;
533 DLOG("mode now: %d\n", con->fullscreen_mode);
535 /* update _NET_WM_STATE if this container has a window */
536 /* TODO: when a window is assigned to a container which is already
537 * fullscreened, this state needs to be pushed to the client, too */
538 if (con->window == NULL)
542 unsigned int num = 0;
544 if (con->fullscreen_mode != CF_NONE)
545 values[num++] = A__NET_WM_STATE_FULLSCREEN;
547 xcb_change_property(conn, XCB_PROP_MODE_REPLACE, con->window->id,
548 A__NET_WM_STATE, XCB_ATOM_ATOM, 32, num, values);
552 * Moves the given container to the currently focused container on the given
555 * The fix_coordinates flag will translate the current coordinates (offset from
556 * the monitor position basically) to appropriate coordinates on the
557 * destination workspace.
558 * Not enabling this behaviour comes in handy when this function gets called by
559 * floating_maybe_reassign_ws, which will only "move" a floating window when it
560 * *already* changed its coordinates to a different output.
562 * The dont_warp flag disables pointer warping and will be set when this
563 * function is called while dragging a floating window.
565 * TODO: is there a better place for this function?
568 void con_move_to_workspace(Con *con, Con *workspace, bool fix_coordinates, bool dont_warp) {
569 if (con->type == CT_WORKSPACE) {
570 DLOG("Moving workspaces is not yet implemented.\n");
574 if (con_is_floating(con)) {
575 DLOG("Using FLOATINGCON instead\n");
579 Con *source_output = con_get_output(con),
580 *dest_output = con_get_output(workspace);
582 /* 1: save the container which is going to be focused after the current
583 * container is moved away */
584 Con *focus_next = con_next_focused(con);
586 /* 2: get the focused container of this workspace */
587 Con *next = con_descend_focused(workspace);
589 /* 3: we go up one level, but only when next is a normal container */
590 if (next->type != CT_WORKSPACE) {
591 DLOG("next originally = %p / %s / type %d\n", next, next->name, next->type);
595 /* 4: if the target container is floating, we get the workspace instead.
596 * Only tiling windows need to get inserted next to the current container.
598 Con *floatingcon = con_inside_floating(next);
599 if (floatingcon != NULL) {
600 DLOG("floatingcon, going up even further\n");
601 next = floatingcon->parent;
604 if (con->type == CT_FLOATING_CON) {
605 Con *ws = con_get_workspace(next);
606 DLOG("This is a floating window, using workspace %p / %s\n", ws, ws->name);
610 if (source_output != dest_output) {
611 /* Take the relative coordinates of the current output, then add them
612 * to the coordinate space of the correct output */
613 if (fix_coordinates && con->type == CT_FLOATING_CON) {
614 DLOG("Floating window, fixing coordinates\n");
615 /* First we get the x/y coordinates relative to the x/y coordinates
616 * of the output on which the window is on */
617 uint32_t rel_x = (con->rect.x - source_output->rect.x);
618 uint32_t rel_y = (con->rect.y - source_output->rect.y);
619 /* Then we calculate a fraction, for example 0.63 for a window
620 * which is at y = 1212 of a 1920 px high output */
621 double fraction_x = ((double)rel_x / source_output->rect.width);
622 double fraction_y = ((double)rel_y / source_output->rect.height);
623 DLOG("rel_x = %d, rel_y = %d, fraction_x = %f, fraction_y = %f, output->w = %d, output->h = %d\n",
624 rel_x, rel_y, fraction_x, fraction_y, source_output->rect.width, source_output->rect.height);
625 con->rect.x = dest_output->rect.x + (fraction_x * dest_output->rect.width);
626 con->rect.y = dest_output->rect.y + (fraction_y * dest_output->rect.height);
627 DLOG("Resulting coordinates: x = %d, y = %d\n", con->rect.x, con->rect.y);
628 } else DLOG("Not fixing coordinates, fix_coordinates flag = %d\n", fix_coordinates);
630 /* If moving to a visible workspace, call show so it can be considered
631 * focused. Must do before attaching because workspace_show checks to see
632 * if focused container is in its area. */
633 if (workspace_is_visible(workspace)) {
634 workspace_show(workspace);
636 /* Don’t warp if told so (when dragging floating windows with the
637 * mouse for example) */
641 x_set_warp_to(&(con->rect));
645 DLOG("Re-attaching container to %p / %s\n", next, next->name);
646 /* 5: re-attach the con to the parent of this focused container */
647 Con *parent = con->parent;
649 con_attach(con, next, false);
651 /* 6: fix the percentages */
652 con_fix_percent(parent);
654 con_fix_percent(next);
656 /* 7: focus the con on the target workspace (the X focus is only updated by
657 * calling tree_render(), so for the "real" focus this is a no-op). */
658 con_focus(con_descend_focused(con));
660 /* 8: when moving to a visible workspace on a different output, we keep the
661 * con focused. Otherwise, we leave the focus on the current workspace as we
662 * don’t want to focus invisible workspaces */
663 if (source_output != dest_output &&
664 workspace_is_visible(workspace)) {
665 DLOG("Moved to a different output, focusing target\n");
667 /* Descend focus stack in case focus_next is a workspace which can
668 * occur if we move to the same workspace. Also show current workspace
669 * to ensure it is focused. */
670 workspace_show(con_get_workspace(focus_next));
671 con_focus(con_descend_focused(focus_next));
674 CALL(parent, on_remove_child);
678 * Returns the orientation of the given container (for stacked containers,
679 * vertical orientation is used regardless of the actual orientation of the
683 int con_orientation(Con *con) {
684 /* stacking containers behave like they are in vertical orientation */
685 if (con->layout == L_STACKED)
688 if (con->layout == L_TABBED)
691 return con->orientation;
695 * Returns the container which will be focused next when the given container
696 * is not available anymore. Called in tree_close and con_move_to_workspace
697 * to properly restore focus.
700 Con *con_next_focused(Con *con) {
702 /* floating containers are attached to a workspace, so we focus either the
703 * next floating container (if any) or the workspace itself. */
704 if (con->type == CT_FLOATING_CON) {
705 DLOG("selecting next for CT_FLOATING_CON\n");
706 next = TAILQ_NEXT(con, floating_windows);
707 DLOG("next = %p\n", next);
709 next = TAILQ_PREV(con, floating_head, floating_windows);
710 DLOG("using prev, next = %p\n", next);
713 Con *ws = con_get_workspace(con);
715 DLOG("no more floating containers for next = %p, restoring workspace focus\n", next);
716 while (next != TAILQ_END(&(ws->focus_head)) && !TAILQ_EMPTY(&(next->focus_head))) {
717 next = TAILQ_FIRST(&(next->focus_head));
719 DLOG("skipping container itself, we want the next client\n");
720 next = TAILQ_NEXT(next, focused);
723 if (next == TAILQ_END(&(ws->focus_head))) {
724 DLOG("Focus list empty, returning ws\n");
728 /* Instead of returning the next CT_FLOATING_CON, we descend it to
729 * get an actual window to focus. */
730 next = con_descend_focused(next);
735 /* dock clients cannot be focused, so we focus the workspace instead */
736 if (con->parent->type == CT_DOCKAREA) {
737 DLOG("selecting workspace for dock client\n");
738 return con_descend_focused(output_get_content(con->parent->parent));
741 /* if 'con' is not the first entry in the focus stack, use the first one as
742 * it’s currently focused already */
743 Con *first = TAILQ_FIRST(&(con->parent->focus_head));
745 DLOG("Using first entry %p\n", first);
748 /* try to focus the next container on the same level as this one or fall
749 * back to its parent */
750 if (!(next = TAILQ_NEXT(con, focused)))
754 /* now go down the focus stack as far as
755 * possible, excluding the current container */
756 while (!TAILQ_EMPTY(&(next->focus_head)) &&
757 TAILQ_FIRST(&(next->focus_head)) != con)
758 next = TAILQ_FIRST(&(next->focus_head));
764 * Get the next/previous container in the specified orientation. This may
765 * travel up until it finds a container with suitable orientation.
768 Con *con_get_next(Con *con, char way, orientation_t orientation) {
769 DLOG("con_get_next(way=%c, orientation=%d)\n", way, orientation);
770 /* 1: get the first parent with the same orientation */
772 while (con_orientation(cur->parent) != orientation) {
773 DLOG("need to go one level further up\n");
774 if (cur->parent->type == CT_WORKSPACE) {
775 LOG("that's a workspace, we can't go further up\n");
781 /* 2: chose next (or previous) */
784 next = TAILQ_NEXT(cur, nodes);
785 /* if we are at the end of the list, we need to wrap */
786 if (next == TAILQ_END(&(parent->nodes_head)))
789 next = TAILQ_PREV(cur, nodes_head, nodes);
790 /* if we are at the end of the list, we need to wrap */
791 if (next == TAILQ_END(&(cur->nodes_head)))
794 DLOG("next = %p\n", next);
800 * Returns the focused con inside this client, descending the tree as far as
801 * possible. This comes in handy when attaching a con to a workspace at the
802 * currently focused position, for example.
805 Con *con_descend_focused(Con *con) {
807 while (!TAILQ_EMPTY(&(next->focus_head)))
808 next = TAILQ_FIRST(&(next->focus_head));
813 * Returns the focused con inside this client, descending the tree as far as
814 * possible. This comes in handy when attaching a con to a workspace at the
815 * currently focused position, for example.
817 * Works like con_descend_focused but considers only tiling cons.
820 Con *con_descend_tiling_focused(Con *con) {
826 TAILQ_FOREACH(child, &(next->focus_head), focused) {
827 if (child->type == CT_FLOATING_CON)
833 } while (before != next);
838 * Returns the leftmost, rightmost, etc. container in sub-tree. For example, if
839 * direction is D_LEFT, then we return the rightmost container and if direction
840 * is D_RIGHT, we return the leftmost container. This is because if we are
841 * moving D_LEFT, and thus want the rightmost container.
844 Con *con_descend_direction(Con *con, direction_t direction) {
846 int orientation = con_orientation(con);
847 DLOG("con_descend_direction(%p, orientation %d, direction %d)\n", con, orientation, direction);
848 if (direction == D_LEFT || direction == D_RIGHT) {
849 if (orientation == HORIZ) {
850 /* If the direction is horizontal, we can use either the first
851 * (D_RIGHT) or the last con (D_LEFT) */
852 if (direction == D_RIGHT)
853 most = TAILQ_FIRST(&(con->nodes_head));
854 else most = TAILQ_LAST(&(con->nodes_head), nodes_head);
855 } else if (orientation == VERT) {
856 /* Wrong orientation. We use the last focused con. Within that con,
857 * we recurse to chose the left/right con or at least the last
859 most = TAILQ_FIRST(&(con->focus_head));
861 /* If the con has no orientation set, it’s not a split container
862 * but a container with a client window, so stop recursing */
867 if (direction == D_UP || direction == D_DOWN) {
868 if (orientation == VERT) {
869 /* If the direction is vertical, we can use either the first
870 * (D_DOWN) or the last con (D_UP) */
871 if (direction == D_UP)
872 most = TAILQ_LAST(&(con->nodes_head), nodes_head);
873 else most = TAILQ_FIRST(&(con->nodes_head));
874 } else if (orientation == HORIZ) {
875 /* Wrong orientation. We use the last focused con. Within that con,
876 * we recurse to chose the top/bottom con or at least the last
878 most = TAILQ_FIRST(&(con->focus_head));
880 /* If the con has no orientation set, it’s not a split container
881 * but a container with a client window, so stop recursing */
888 return con_descend_direction(most, direction);
892 * Returns a "relative" Rect which contains the amount of pixels that need to
893 * be added to the original Rect to get the final position (obviously the
894 * amount of pixels for normal, 1pixel and borderless are different).
897 Rect con_border_style_rect(Con *con) {
898 switch (con_border_style(con)) {
900 return (Rect){2, 0, -(2 * 2), -2};
903 return (Rect){1, 1, -2, -2};
906 return (Rect){0, 0, 0, 0};
914 * Use this function to get a container’s border style. This is important
915 * because when inside a stack, the border style is always BS_NORMAL.
916 * For tabbed mode, the same applies, with one exception: when the container is
917 * borderless and the only element in the tabbed container, the border is not
920 * For children of a CT_DOCKAREA, the border style is always none.
923 int con_border_style(Con *con) {
924 Con *fs = con_get_fullscreen_con(con->parent, CF_OUTPUT);
926 DLOG("this one is fullscreen! overriding BS_NONE\n");
930 if (con->parent->layout == L_STACKED)
931 return (con_num_children(con->parent) == 1 ? con->border_style : BS_NORMAL);
933 if (con->parent->layout == L_TABBED && con->border_style != BS_NORMAL)
934 return (con_num_children(con->parent) == 1 ? con->border_style : BS_NORMAL);
936 if (con->parent->type == CT_DOCKAREA)
939 return con->border_style;
943 * This function changes the layout of a given container. Use it to handle
944 * special cases like changing a whole workspace to stacked/tabbed (creates a
945 * new split container before).
948 void con_set_layout(Con *con, int layout) {
949 /* When the container type is CT_WORKSPACE, the user wants to change the
950 * whole workspace into stacked/tabbed mode. To do this and still allow
951 * intuitive operations (like level-up and then opening a new window), we
952 * need to create a new split container. */
953 if (con->type == CT_WORKSPACE) {
954 DLOG("Creating new split container\n");
955 /* 1: create a new split container */
956 Con *new = con_new(NULL, NULL);
959 /* 2: set the requested layout on the split con */
960 new->layout = layout;
962 /* 3: While the layout is irrelevant in stacked/tabbed mode, it needs
963 * to be set. Otherwise, this con will not be interpreted as a split
965 if (config.default_orientation == NO_ORIENTATION) {
966 new->orientation = (con->rect.height > con->rect.width) ? VERT : HORIZ;
968 new->orientation = config.default_orientation;
971 Con *old_focused = TAILQ_FIRST(&(con->focus_head));
972 if (old_focused == TAILQ_END(&(con->focus_head)))
975 /* 4: move the existing cons of this workspace below the new con */
976 DLOG("Moving cons\n");
978 while (!TAILQ_EMPTY(&(con->nodes_head))) {
979 child = TAILQ_FIRST(&(con->nodes_head));
981 con_attach(child, new, true);
984 /* 4: attach the new split container to the workspace */
985 DLOG("Attaching new split to ws\n");
986 con_attach(new, con, false);
989 con_focus(old_focused);
996 con->layout = layout;
1000 * Callback which will be called when removing a child from the given con.
1001 * Kills the container if it is empty and replaces it with the child if there
1002 * is exactly one child.
1005 static void con_on_remove_child(Con *con) {
1006 DLOG("on_remove_child\n");
1008 /* Every container 'above' (in the hierarchy) the workspace content should
1009 * not be closed when the last child was removed */
1010 if (con->type == CT_OUTPUT ||
1011 con->type == CT_ROOT ||
1012 con->type == CT_DOCKAREA) {
1013 DLOG("not handling, type = %d\n", con->type);
1017 /* For workspaces, close them only if they're not visible anymore */
1018 if (con->type == CT_WORKSPACE) {
1019 int children = con_num_children(con);
1020 if (children == 0 && !workspace_is_visible(con)) {
1021 LOG("Closing old workspace (%p / %s), it is empty\n", con, con->name);
1022 tree_close(con, DONT_KILL_WINDOW, false, false);
1023 ipc_send_event("workspace", I3_IPC_EVENT_WORKSPACE, "{\"change\":\"empty\"}");
1024 ewmh_update_workarea();
1029 /* TODO: check if this container would swallow any other client and
1030 * don’t close it automatically. */
1031 int children = con_num_children(con);
1032 if (children == 0) {
1033 DLOG("Container empty, closing\n");
1034 tree_close(con, DONT_KILL_WINDOW, false, false);
1040 * Determines the minimum size of the given con by looking at its children (for
1041 * split/stacked/tabbed cons). Will be called when resizing floating cons
1044 Rect con_minimum_size(Con *con) {
1045 DLOG("Determining minimum size for con %p\n", con);
1047 if (con_is_leaf(con)) {
1048 DLOG("leaf node, returning 75x50\n");
1049 return (Rect){ 0, 0, 75, 50 };
1052 if (con->type == CT_FLOATING_CON) {
1053 DLOG("floating con\n");
1054 Con *child = TAILQ_FIRST(&(con->nodes_head));
1055 return con_minimum_size(child);
1058 if (con->layout == L_STACKED || con->layout == L_TABBED) {
1059 uint32_t max_width = 0, max_height = 0, deco_height = 0;
1061 TAILQ_FOREACH(child, &(con->nodes_head), nodes) {
1062 Rect min = con_minimum_size(child);
1063 deco_height += child->deco_rect.height;
1064 max_width = max(max_width, min.width);
1065 max_height = max(max_height, min.height);
1067 DLOG("stacked/tabbed now, returning %d x %d + deco_rect = %d\n",
1068 max_width, max_height, deco_height);
1069 return (Rect){ 0, 0, max_width, max_height + deco_height };
1072 /* For horizontal/vertical split containers we sum up the width (h-split)
1073 * or height (v-split) and use the maximum of the height (h-split) or width
1074 * (v-split) as minimum size. */
1075 if (con->orientation == HORIZ || con->orientation == VERT) {
1076 uint32_t width = 0, height = 0;
1078 TAILQ_FOREACH(child, &(con->nodes_head), nodes) {
1079 Rect min = con_minimum_size(child);
1080 if (con->orientation == HORIZ) {
1082 height = max(height, min.height);
1084 height += min.height;
1085 width = max(width, min.width);
1088 DLOG("split container, returning width = %d x height = %d\n", width, height);
1089 return (Rect){ 0, 0, width, height };
1092 ELOG("Unhandled case, type = %d, layout = %d, orientation = %d\n",
1093 con->type, con->layout, con->orientation);