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 * Checks if the given container is inside a focused container.
365 Con *con_inside_focused(Con *con) {
370 return con_inside_focused(con->parent);
374 * Returns the container with the given client window ID or NULL if no such
378 Con *con_by_window_id(xcb_window_t window) {
380 TAILQ_FOREACH(con, &all_cons, all_cons)
381 if (con->window != NULL && con->window->id == window)
387 * Returns the container with the given frame ID or NULL if no such container
391 Con *con_by_frame_id(xcb_window_t frame) {
393 TAILQ_FOREACH(con, &all_cons, all_cons)
394 if (con->frame == frame)
400 * Returns the first container below 'con' which wants to swallow this window
404 Con *con_for_window(Con *con, i3Window *window, Match **store_match) {
407 DLOG("searching con for window %p starting at con %p\n", window, con);
408 DLOG("class == %s\n", window->class_class);
410 TAILQ_FOREACH(child, &(con->nodes_head), nodes) {
411 TAILQ_FOREACH(match, &(child->swallow_head), matches) {
412 if (!match_matches_window(match, window))
414 if (store_match != NULL)
415 *store_match = match;
418 Con *result = con_for_window(child, window, store_match);
423 TAILQ_FOREACH(child, &(con->floating_head), floating_windows) {
424 TAILQ_FOREACH(match, &(child->swallow_head), matches) {
425 if (!match_matches_window(match, window))
427 if (store_match != NULL)
428 *store_match = match;
431 Con *result = con_for_window(child, window, store_match);
440 * Returns the number of children of this container.
443 int con_num_children(Con *con) {
447 TAILQ_FOREACH(child, &(con->nodes_head), nodes)
454 * Updates the percent attribute of the children of the given container. This
455 * function needs to be called when a window is added or removed from a
459 void con_fix_percent(Con *con) {
461 int children = con_num_children(con);
463 // calculate how much we have distributed and how many containers
464 // with a percentage set we have
466 int children_with_percent = 0;
467 TAILQ_FOREACH(child, &(con->nodes_head), nodes) {
468 if (child->percent > 0.0) {
469 total += child->percent;
470 ++children_with_percent;
474 // if there were children without a percentage set, set to a value that
475 // will make those children proportional to all others
476 if (children_with_percent != children) {
477 TAILQ_FOREACH(child, &(con->nodes_head), nodes) {
478 if (child->percent <= 0.0) {
479 if (children_with_percent == 0)
480 total += (child->percent = 1.0);
481 else total += (child->percent = total / children_with_percent);
486 // if we got a zero, just distribute the space equally, otherwise
487 // distribute according to the proportions we got
489 TAILQ_FOREACH(child, &(con->nodes_head), nodes)
490 child->percent = 1.0 / children;
491 } else if (total != 1.0) {
492 TAILQ_FOREACH(child, &(con->nodes_head), nodes)
493 child->percent /= total;
498 * Toggles fullscreen mode for the given container. Fullscreen mode will not be
499 * entered when there already is a fullscreen container on this workspace.
502 void con_toggle_fullscreen(Con *con, int fullscreen_mode) {
503 Con *workspace, *fullscreen;
505 if (con->type == CT_WORKSPACE) {
506 DLOG("You cannot make a workspace fullscreen.\n");
510 DLOG("toggling fullscreen for %p / %s\n", con, con->name);
511 if (con->fullscreen_mode == CF_NONE) {
512 /* 1: check if there already is a fullscreen con */
513 if (fullscreen_mode == CF_GLOBAL)
514 fullscreen = con_get_fullscreen_con(croot, CF_GLOBAL);
516 workspace = con_get_workspace(con);
517 fullscreen = con_get_fullscreen_con(workspace, CF_OUTPUT);
519 if (fullscreen != NULL) {
520 LOG("Not entering fullscreen mode, container (%p/%s) "
521 "already is in fullscreen mode\n",
522 fullscreen, fullscreen->name);
523 goto update_netwm_state;
526 /* 2: enable fullscreen */
527 con->fullscreen_mode = fullscreen_mode;
529 /* 1: disable fullscreen */
530 con->fullscreen_mode = CF_NONE;
534 DLOG("mode now: %d\n", con->fullscreen_mode);
536 /* update _NET_WM_STATE if this container has a window */
537 /* TODO: when a window is assigned to a container which is already
538 * fullscreened, this state needs to be pushed to the client, too */
539 if (con->window == NULL)
543 unsigned int num = 0;
545 if (con->fullscreen_mode != CF_NONE)
546 values[num++] = A__NET_WM_STATE_FULLSCREEN;
548 xcb_change_property(conn, XCB_PROP_MODE_REPLACE, con->window->id,
549 A__NET_WM_STATE, XCB_ATOM_ATOM, 32, num, values);
553 * Moves the given container to the currently focused container on the given
556 * The dont_warp flag disables pointer warping and will be set when this
557 * function is called while dragging a floating window.
559 * TODO: is there a better place for this function?
562 void con_move_to_workspace(Con *con, Con *workspace, bool dont_warp) {
563 if (con->type == CT_WORKSPACE) {
564 DLOG("Moving workspaces is not yet implemented.\n");
568 if (con_is_floating(con)) {
569 DLOG("Using FLOATINGCON instead\n");
573 Con *source_output = con_get_output(con),
574 *dest_output = con_get_output(workspace);
576 /* 1: save the container which is going to be focused after the current
577 * container is moved away */
578 Con *focus_next = con_next_focused(con);
580 /* 2: get the focused container of this workspace */
581 Con *next = con_descend_focused(workspace);
583 /* 3: we go up one level, but only when next is a normal container */
584 if (next->type != CT_WORKSPACE) {
585 DLOG("next originally = %p / %s / type %d\n", next, next->name, next->type);
589 /* 4: if the target container is floating, we get the workspace instead.
590 * Only tiling windows need to get inserted next to the current container.
592 Con *floatingcon = con_inside_floating(next);
593 if (floatingcon != NULL) {
594 DLOG("floatingcon, going up even further\n");
595 next = floatingcon->parent;
598 if (con->type == CT_FLOATING_CON) {
599 Con *ws = con_get_workspace(next);
600 DLOG("This is a floating window, using workspace %p / %s\n", ws, ws->name);
604 /* If moving to a visible workspace, call show so it can be considered
605 * focused. Must do before attaching because workspace_show checks to see
606 * if focused container is in its area. */
607 if (source_output != dest_output &&
608 workspace_is_visible(workspace)) {
609 workspace_show(workspace->name);
611 if (con->type == CT_FLOATING_CON) {
612 DLOG("Floating window, fixing coordinates\n");
613 /* Take the relative coordinates of the current output, then add them
614 * to the coordinate space of the correct output */
615 uint32_t rel_x = (con->rect.x - source_output->rect.x);
616 uint32_t rel_y = (con->rect.y - source_output->rect.y);
617 con->rect.x = dest_output->rect.x + rel_x;
618 con->rect.y = dest_output->rect.y + rel_y;
621 /* Don’t warp if told so (when dragging floating windows with the
622 * mouse for example) */
626 x_set_warp_to(&(con->rect));
629 DLOG("Re-attaching container to %p / %s\n", next, next->name);
630 /* 5: re-attach the con to the parent of this focused container */
631 Con *parent = con->parent;
633 con_attach(con, next, false);
635 /* 6: fix the percentages */
636 con_fix_percent(parent);
638 con_fix_percent(next);
640 /* 7: focus the con on the target workspace (the X focus is only updated by
641 * calling tree_render(), so for the "real" focus this is a no-op). */
642 con_focus(con_descend_focused(con));
644 /* 8: when moving to a visible workspace on a different output, we keep the
645 * con focused. Otherwise, we leave the focus on the current workspace as we
646 * don’t want to focus invisible workspaces */
647 if (source_output != dest_output &&
648 workspace_is_visible(workspace)) {
649 DLOG("Moved to a different output, focusing target\n");
651 /* Descend focus stack in case focus_next is a workspace which can
652 * occur if we move to the same workspace. Also show current workspace
653 * to ensure it is focused. */
654 workspace_show(con_get_workspace(focus_next)->name);
655 con_focus(con_descend_focused(focus_next));
658 CALL(parent, on_remove_child);
662 * Returns the orientation of the given container (for stacked containers,
663 * vertical orientation is used regardless of the actual orientation of the
667 int con_orientation(Con *con) {
668 /* stacking containers behave like they are in vertical orientation */
669 if (con->layout == L_STACKED)
672 if (con->layout == L_TABBED)
675 return con->orientation;
679 * Returns the container which will be focused next when the given container
680 * is not available anymore. Called in tree_close and con_move_to_workspace
681 * to properly restore focus.
684 Con *con_next_focused(Con *con) {
686 /* floating containers are attached to a workspace, so we focus either the
687 * next floating container (if any) or the workspace itself. */
688 if (con->type == CT_FLOATING_CON) {
689 DLOG("selecting next for CT_FLOATING_CON\n");
690 next = TAILQ_NEXT(con, floating_windows);
691 DLOG("next = %p\n", next);
693 next = TAILQ_PREV(con, floating_head, floating_windows);
694 DLOG("using prev, next = %p\n", next);
697 Con *ws = con_get_workspace(con);
699 DLOG("no more floating containers for next = %p, restoring workspace focus\n", next);
700 while (next != TAILQ_END(&(ws->focus_head)) && !TAILQ_EMPTY(&(next->focus_head))) {
701 next = TAILQ_FIRST(&(next->focus_head));
703 DLOG("skipping container itself, we want the next client\n");
704 next = TAILQ_NEXT(next, focused);
707 if (next == TAILQ_END(&(ws->focus_head))) {
708 DLOG("Focus list empty, returning ws\n");
712 /* Instead of returning the next CT_FLOATING_CON, we descend it to
713 * get an actual window to focus. */
714 next = con_descend_focused(next);
719 /* dock clients cannot be focused, so we focus the workspace instead */
720 if (con->parent->type == CT_DOCKAREA) {
721 DLOG("selecting workspace for dock client\n");
722 return con_descend_focused(output_get_content(con->parent->parent));
725 /* if 'con' is not the first entry in the focus stack, use the first one as
726 * it’s currently focused already */
727 Con *first = TAILQ_FIRST(&(con->parent->focus_head));
729 DLOG("Using first entry %p\n", first);
732 /* try to focus the next container on the same level as this one or fall
733 * back to its parent */
734 if (!(next = TAILQ_NEXT(con, focused)))
738 /* now go down the focus stack as far as
739 * possible, excluding the current container */
740 while (!TAILQ_EMPTY(&(next->focus_head)) &&
741 TAILQ_FIRST(&(next->focus_head)) != con)
742 next = TAILQ_FIRST(&(next->focus_head));
748 * Get the next/previous container in the specified orientation. This may
749 * travel up until it finds a container with suitable orientation.
752 Con *con_get_next(Con *con, char way, orientation_t orientation) {
753 DLOG("con_get_next(way=%c, orientation=%d)\n", way, orientation);
754 /* 1: get the first parent with the same orientation */
756 while (con_orientation(cur->parent) != orientation) {
757 DLOG("need to go one level further up\n");
758 if (cur->parent->type == CT_WORKSPACE) {
759 LOG("that's a workspace, we can't go further up\n");
765 /* 2: chose next (or previous) */
768 next = TAILQ_NEXT(cur, nodes);
769 /* if we are at the end of the list, we need to wrap */
770 if (next == TAILQ_END(&(parent->nodes_head)))
773 next = TAILQ_PREV(cur, nodes_head, nodes);
774 /* if we are at the end of the list, we need to wrap */
775 if (next == TAILQ_END(&(cur->nodes_head)))
778 DLOG("next = %p\n", next);
784 * Returns the focused con inside this client, descending the tree as far as
785 * possible. This comes in handy when attaching a con to a workspace at the
786 * currently focused position, for example.
789 Con *con_descend_focused(Con *con) {
791 while (!TAILQ_EMPTY(&(next->focus_head)))
792 next = TAILQ_FIRST(&(next->focus_head));
797 * Returns the focused con inside this client, descending the tree as far as
798 * possible. This comes in handy when attaching a con to a workspace at the
799 * currently focused position, for example.
801 * Works like con_descend_focused but considers only tiling cons.
804 Con *con_descend_tiling_focused(Con *con) {
810 TAILQ_FOREACH(child, &(next->focus_head), focused) {
811 if (child->type == CT_FLOATING_CON)
817 } while (before != next);
822 * Returns the leftmost, rightmost, etc. container in sub-tree. For example, if
823 * direction is D_LEFT, then we return the rightmost container and if direction
824 * is D_RIGHT, we return the leftmost container. This is because if we are
825 * moving D_LEFT, and thus want the rightmost container.
828 Con *con_descend_direction(Con *con, direction_t direction) {
830 DLOG("con_descend_direction(%p, %d)\n", con, direction);
831 if (direction == D_LEFT || direction == D_RIGHT) {
832 if (con->orientation == HORIZ) {
833 /* If the direction is horizontal, we can use either the first
834 * (D_RIGHT) or the last con (D_LEFT) */
835 if (direction == D_RIGHT)
836 most = TAILQ_FIRST(&(con->nodes_head));
837 else most = TAILQ_LAST(&(con->nodes_head), nodes_head);
838 } else if (con->orientation == VERT) {
839 /* Wrong orientation. We use the last focused con. Within that con,
840 * we recurse to chose the left/right con or at least the last
842 most = TAILQ_FIRST(&(con->focus_head));
844 /* If the con has no orientation set, it’s not a split container
845 * but a container with a client window, so stop recursing */
850 if (direction == D_UP || direction == D_DOWN) {
851 if (con->orientation == VERT) {
852 /* If the direction is vertical, we can use either the first
853 * (D_DOWN) or the last con (D_UP) */
854 if (direction == D_UP)
855 most = TAILQ_LAST(&(con->nodes_head), nodes_head);
856 else most = TAILQ_FIRST(&(con->nodes_head));
857 } else if (con->orientation == HORIZ) {
858 /* Wrong orientation. We use the last focused con. Within that con,
859 * we recurse to chose the top/bottom con or at least the last
861 most = TAILQ_FIRST(&(con->focus_head));
863 /* If the con has no orientation set, it’s not a split container
864 * but a container with a client window, so stop recursing */
871 return con_descend_direction(most, direction);
875 * Returns a "relative" Rect which contains the amount of pixels that need to
876 * be added to the original Rect to get the final position (obviously the
877 * amount of pixels for normal, 1pixel and borderless are different).
880 Rect con_border_style_rect(Con *con) {
881 switch (con_border_style(con)) {
883 return (Rect){2, 0, -(2 * 2), -2};
886 return (Rect){1, 1, -2, -2};
889 return (Rect){0, 0, 0, 0};
897 * Use this function to get a container’s border style. This is important
898 * because when inside a stack, the border style is always BS_NORMAL.
899 * For tabbed mode, the same applies, with one exception: when the container is
900 * borderless and the only element in the tabbed container, the border is not
903 * For children of a CT_DOCKAREA, the border style is always none.
906 int con_border_style(Con *con) {
907 Con *fs = con_get_fullscreen_con(con->parent, CF_OUTPUT);
909 DLOG("this one is fullscreen! overriding BS_NONE\n");
913 if (con->parent->layout == L_STACKED)
914 return (con_num_children(con->parent) == 1 ? con->border_style : BS_NORMAL);
916 if (con->parent->layout == L_TABBED && con->border_style != BS_NORMAL)
917 return (con_num_children(con->parent) == 1 ? con->border_style : BS_NORMAL);
919 if (con->parent->type == CT_DOCKAREA)
922 return con->border_style;
926 * This function changes the layout of a given container. Use it to handle
927 * special cases like changing a whole workspace to stacked/tabbed (creates a
928 * new split container before).
931 void con_set_layout(Con *con, int layout) {
932 /* When the container type is CT_WORKSPACE, the user wants to change the
933 * whole workspace into stacked/tabbed mode. To do this and still allow
934 * intuitive operations (like level-up and then opening a new window), we
935 * need to create a new split container. */
936 if (con->type == CT_WORKSPACE) {
937 DLOG("Creating new split container\n");
938 /* 1: create a new split container */
939 Con *new = con_new(NULL, NULL);
942 /* 2: set the requested layout on the split con */
943 new->layout = layout;
945 /* 3: While the layout is irrelevant in stacked/tabbed mode, it needs
946 * to be set. Otherwise, this con will not be interpreted as a split
948 if (config.default_orientation == NO_ORIENTATION) {
949 new->orientation = (con->rect.height > con->rect.width) ? VERT : HORIZ;
951 new->orientation = config.default_orientation;
954 Con *old_focused = TAILQ_FIRST(&(con->focus_head));
955 if (old_focused == TAILQ_END(&(con->focus_head)))
958 /* 4: move the existing cons of this workspace below the new con */
959 DLOG("Moving cons\n");
961 while (!TAILQ_EMPTY(&(con->nodes_head))) {
962 child = TAILQ_FIRST(&(con->nodes_head));
964 con_attach(child, new, true);
967 /* 4: attach the new split container to the workspace */
968 DLOG("Attaching new split to ws\n");
969 con_attach(new, con, false);
972 con_focus(old_focused);
979 con->layout = layout;
983 * Callback which will be called when removing a child from the given con.
984 * Kills the container if it is empty and replaces it with the child if there
985 * is exactly one child.
988 static void con_on_remove_child(Con *con) {
989 DLOG("on_remove_child\n");
991 /* Every container 'above' (in the hierarchy) the workspace content should
992 * not be closed when the last child was removed */
993 if (con->type == CT_WORKSPACE ||
994 con->type == CT_OUTPUT ||
995 con->type == CT_ROOT ||
996 con->type == CT_DOCKAREA) {
997 DLOG("not handling, type = %d\n", con->type);
1001 /* TODO: check if this container would swallow any other client and
1002 * don’t close it automatically. */
1003 int children = con_num_children(con);
1004 if (children == 0) {
1005 DLOG("Container empty, closing\n");
1006 tree_close(con, DONT_KILL_WINDOW, false);
1012 * Determines the minimum size of the given con by looking at its children (for
1013 * split/stacked/tabbed cons). Will be called when resizing floating cons
1016 Rect con_minimum_size(Con *con) {
1017 DLOG("Determining minimum size for con %p\n", con);
1019 if (con_is_leaf(con)) {
1020 DLOG("leaf node, returning 75x50\n");
1021 return (Rect){ 0, 0, 75, 50 };
1024 if (con->type == CT_FLOATING_CON) {
1025 DLOG("floating con\n");
1026 Con *child = TAILQ_FIRST(&(con->nodes_head));
1027 return con_minimum_size(child);
1030 if (con->layout == L_STACKED || con->layout == L_TABBED) {
1031 uint32_t max_width = 0, max_height = 0, deco_height = 0;
1033 TAILQ_FOREACH(child, &(con->nodes_head), nodes) {
1034 Rect min = con_minimum_size(child);
1035 deco_height += child->deco_rect.height;
1036 max_width = max(max_width, min.width);
1037 max_height = max(max_height, min.height);
1039 DLOG("stacked/tabbed now, returning %d x %d + deco_rect = %d\n",
1040 max_width, max_height, deco_height);
1041 return (Rect){ 0, 0, max_width, max_height + deco_height };
1044 /* For horizontal/vertical split containers we sum up the width (h-split)
1045 * or height (v-split) and use the maximum of the height (h-split) or width
1046 * (v-split) as minimum size. */
1047 if (con->orientation == HORIZ || con->orientation == VERT) {
1048 uint32_t width = 0, height = 0;
1050 TAILQ_FOREACH(child, &(con->nodes_head), nodes) {
1051 Rect min = con_minimum_size(child);
1052 if (con->orientation == HORIZ) {
1054 height = max(height, min.height);
1056 height += min.height;
1057 width = max(width, min.width);
1060 DLOG("split container, returning width = %d x height = %d\n", width, height);
1061 return (Rect){ 0, 0, width, height };
1064 ELOG("Unhandled case, type = %d, layout = %d, orientation = %d\n",
1065 con->type, con->layout, con->orientation);