/*
* vim:ts=4:sw=4:expandtab
*
* i3 - an improved dynamic tiling window manager
* © 2009-2011 Michael Stapelberg and contributors (see also: LICENSE)
*
* con.c: Functions which deal with containers directly (creating containers,
* searching containers, getting specific properties from containers,
* …).
*
*/
#include "all.h"
char *colors[] = {
"#ff0000",
"#00FF00",
"#0000FF",
"#ff00ff",
"#00ffff",
"#ffff00",
"#aa0000",
"#00aa00",
"#0000aa",
"#aa00aa"
};
static void con_on_remove_child(Con *con);
/*
* Create a new container (and attach it to the given parent, if not NULL).
* This function initializes the data structures and creates the appropriate
* X11 IDs using x_con_init().
*
*/
Con *con_new(Con *parent, i3Window *window) {
Con *new = scalloc(sizeof(Con));
new->on_remove_child = con_on_remove_child;
TAILQ_INSERT_TAIL(&all_cons, new, all_cons);
new->type = CT_CON;
new->window = window;
new->border_style = config.default_border;
static int cnt = 0;
DLOG("opening window %d\n", cnt);
/* TODO: remove window coloring after test-phase */
DLOG("color %s\n", colors[cnt]);
new->name = strdup(colors[cnt]);
//uint32_t cp = get_colorpixel(colors[cnt]);
cnt++;
if ((cnt % (sizeof(colors) / sizeof(char*))) == 0)
cnt = 0;
x_con_init(new);
TAILQ_INIT(&(new->floating_head));
TAILQ_INIT(&(new->nodes_head));
TAILQ_INIT(&(new->focus_head));
TAILQ_INIT(&(new->swallow_head));
if (parent != NULL)
con_attach(new, parent, false);
return new;
}
/*
* Attaches the given container to the given parent. This happens when moving
* a container or when inserting a new container at a specific place in the
* tree.
*
* ignore_focus is to just insert the Con at the end (useful when creating a
* new split container *around* some containers, that is, detaching and
* attaching them in order without wanting to mess with the focus in between).
*
*/
void con_attach(Con *con, Con *parent, bool ignore_focus) {
con->parent = parent;
Con *loop;
Con *current = NULL;
struct nodes_head *nodes_head = &(parent->nodes_head);
struct focus_head *focus_head = &(parent->focus_head);
/* Workspaces are handled differently: they need to be inserted at the
* right position. */
if (con->type == CT_WORKSPACE) {
DLOG("it's a workspace. num = %d\n", con->num);
if (con->num == -1 || TAILQ_EMPTY(nodes_head)) {
TAILQ_INSERT_TAIL(nodes_head, con, nodes);
} else {
current = TAILQ_FIRST(nodes_head);
if (con->num < current->num) {
/* we need to insert the container at the beginning */
TAILQ_INSERT_HEAD(nodes_head, con, nodes);
} else {
while (current->num != -1 && con->num > current->num) {
current = TAILQ_NEXT(current, nodes);
if (current == TAILQ_END(nodes_head)) {
current = NULL;
break;
}
}
/* we need to insert con after current, if current is not NULL */
if (current)
TAILQ_INSERT_BEFORE(current, con, nodes);
else TAILQ_INSERT_TAIL(nodes_head, con, nodes);
}
}
goto add_to_focus_head;
}
if (con->type == CT_FLOATING_CON) {
DLOG("Inserting into floating containers\n");
TAILQ_INSERT_TAIL(&(parent->floating_head), con, floating_windows);
} else {
if (!ignore_focus) {
/* Get the first tiling container in focus stack */
TAILQ_FOREACH(loop, &(parent->focus_head), focused) {
if (loop->type == CT_FLOATING_CON)
continue;
current = loop;
break;
}
}
/* When the container is not a split container (but contains a window)
* and is attached to a workspace, we check if the user configured a
* workspace_layout. This is done in workspace_attach_to, which will
* provide us with the container to which we should attach (either the
* workspace or a new split container with the configured
* workspace_layout).
*/
if (con->window != NULL && parent->type == CT_WORKSPACE) {
DLOG("Parent is a workspace. Applying default layout...\n");
Con *target = workspace_attach_to(parent);
/* Attach the original con to this new split con instead */
nodes_head = &(target->nodes_head);
focus_head = &(target->focus_head);
con->parent = target;
current = NULL;
DLOG("done\n");
}
/* Insert the container after the tiling container, if found.
* When adding to a CT_OUTPUT, just append one after another. */
if (current && parent->type != CT_OUTPUT) {
DLOG("Inserting con = %p after last focused tiling con %p\n",
con, current);
TAILQ_INSERT_AFTER(nodes_head, current, con, nodes);
} else TAILQ_INSERT_TAIL(nodes_head, con, nodes);
}
add_to_focus_head:
/* We insert to the TAIL because con_focus() will correct this.
* This way, we have the option to insert Cons without having
* to focus them. */
TAILQ_INSERT_TAIL(focus_head, con, focused);
}
/*
* Detaches the given container from its current parent
*
*/
void con_detach(Con *con) {
if (con->type == CT_FLOATING_CON) {
TAILQ_REMOVE(&(con->parent->floating_head), con, floating_windows);
TAILQ_REMOVE(&(con->parent->focus_head), con, focused);
} else {
TAILQ_REMOVE(&(con->parent->nodes_head), con, nodes);
TAILQ_REMOVE(&(con->parent->focus_head), con, focused);
}
}
/*
* Sets input focus to the given container. Will be updated in X11 in the next
* run of x_push_changes().
*
*/
void con_focus(Con *con) {
assert(con != NULL);
DLOG("con_focus = %p\n", con);
/* 1: set focused-pointer to the new con */
/* 2: exchange the position of the container in focus stack of the parent all the way up */
TAILQ_REMOVE(&(con->parent->focus_head), con, focused);
TAILQ_INSERT_HEAD(&(con->parent->focus_head), con, focused);
if (con->parent->parent != NULL)
con_focus(con->parent);
focused = con;
if (con->urgent) {
con->urgent = false;
workspace_update_urgent_flag(con_get_workspace(con));
}
}
/*
* Returns true when this node is a leaf node (has no children)
*
*/
bool con_is_leaf(Con *con) {
return TAILQ_EMPTY(&(con->nodes_head));
}
/*
* Returns true if this node accepts a window (if the node swallows windows,
* it might already have swallowed enough and cannot hold any more).
*
*/
bool con_accepts_window(Con *con) {
/* 1: workspaces never accept direct windows */
if (con->type == CT_WORKSPACE)
return false;
if (con->orientation != NO_ORIENTATION) {
DLOG("container %p does not accepts windows, orientation != NO_ORIENTATION\n", con);
return false;
}
/* TODO: if this is a swallowing container, we need to check its max_clients */
return (con->window == NULL);
}
/*
* Gets the output container (first container with CT_OUTPUT in hierarchy) this
* node is on.
*
*/
Con *con_get_output(Con *con) {
Con *result = con;
while (result != NULL && result->type != CT_OUTPUT)
result = result->parent;
/* We must be able to get an output because focus can never be set higher
* in the tree (root node cannot be focused). */
assert(result != NULL);
return result;
}
/*
* Gets the workspace container this node is on.
*
*/
Con *con_get_workspace(Con *con) {
Con *result = con;
while (result != NULL && result->type != CT_WORKSPACE)
result = result->parent;
return result;
}
/*
* Searches parenst of the given 'con' until it reaches one with the specified
* 'orientation'. Aborts when it comes across a floating_con.
*
*/
Con *con_parent_with_orientation(Con *con, orientation_t orientation) {
DLOG("Searching for parent of Con %p with orientation %d\n", con, orientation);
Con *parent = con->parent;
if (parent->type == CT_FLOATING_CON)
return NULL;
while (con_orientation(parent) != orientation) {
DLOG("Need to go one level further up\n");
parent = parent->parent;
/* Abort when we reach a floating con */
if (parent && parent->type == CT_FLOATING_CON)
parent = NULL;
if (parent == NULL)
break;
}
DLOG("Result: %p\n", parent);
return parent;
}
/*
* helper data structure for the breadth-first-search in
* con_get_fullscreen_con()
*
*/
struct bfs_entry {
Con *con;
TAILQ_ENTRY(bfs_entry) entries;
};
/*
* Returns the first fullscreen node below this node.
*
*/
Con *con_get_fullscreen_con(Con *con, int fullscreen_mode) {
Con *current, *child;
/* TODO: is breadth-first-search really appropriate? (check as soon as
* fullscreen levels and fullscreen for containers is implemented) */
TAILQ_HEAD(bfs_head, bfs_entry) bfs_head = TAILQ_HEAD_INITIALIZER(bfs_head);
struct bfs_entry *entry = smalloc(sizeof(struct bfs_entry));
entry->con = con;
TAILQ_INSERT_TAIL(&bfs_head, entry, entries);
while (!TAILQ_EMPTY(&bfs_head)) {
entry = TAILQ_FIRST(&bfs_head);
current = entry->con;
if (current != con && current->fullscreen_mode == fullscreen_mode) {
/* empty the queue */
while (!TAILQ_EMPTY(&bfs_head)) {
entry = TAILQ_FIRST(&bfs_head);
TAILQ_REMOVE(&bfs_head, entry, entries);
free(entry);
}
return current;
}
TAILQ_REMOVE(&bfs_head, entry, entries);
free(entry);
TAILQ_FOREACH(child, &(current->nodes_head), nodes) {
entry = smalloc(sizeof(struct bfs_entry));
entry->con = child;
TAILQ_INSERT_TAIL(&bfs_head, entry, entries);
}
TAILQ_FOREACH(child, &(current->floating_head), floating_windows) {
entry = smalloc(sizeof(struct bfs_entry));
entry->con = child;
TAILQ_INSERT_TAIL(&bfs_head, entry, entries);
}
}
return NULL;
}
/*
* Returns true if the node is floating.
*
*/
bool con_is_floating(Con *con) {
assert(con != NULL);
DLOG("checking if con %p is floating\n", con);
return (con->floating >= FLOATING_AUTO_ON);
}
/*
* Checks if the given container is either floating or inside some floating
* container. It returns the FLOATING_CON container.
*
*/
Con *con_inside_floating(Con *con) {
assert(con != NULL);
if (con->type == CT_FLOATING_CON)
return con;
if (con->floating >= FLOATING_AUTO_ON)
return con->parent;
if (con->type == CT_WORKSPACE || con->type == CT_OUTPUT)
return NULL;
return con_inside_floating(con->parent);
}
/*
* Checks if the given container is inside a focused container.
*
*/
bool con_inside_focused(Con *con) {
if (con == focused)
return true;
if (!con->parent)
return false;
return con_inside_focused(con->parent);
}
/*
* Returns the container with the given client window ID or NULL if no such
* container exists.
*
*/
Con *con_by_window_id(xcb_window_t window) {
Con *con;
TAILQ_FOREACH(con, &all_cons, all_cons)
if (con->window != NULL && con->window->id == window)
return con;
return NULL;
}
/*
* Returns the container with the given frame ID or NULL if no such container
* exists.
*
*/
Con *con_by_frame_id(xcb_window_t frame) {
Con *con;
TAILQ_FOREACH(con, &all_cons, all_cons)
if (con->frame == frame)
return con;
return NULL;
}
/*
* Returns the first container below 'con' which wants to swallow this window
* TODO: priority
*
*/
Con *con_for_window(Con *con, i3Window *window, Match **store_match) {
Con *child;
Match *match;
//DLOG("searching con for window %p starting at con %p\n", window, con);
//DLOG("class == %s\n", window->class_class);
TAILQ_FOREACH(child, &(con->nodes_head), nodes) {
TAILQ_FOREACH(match, &(child->swallow_head), matches) {
if (!match_matches_window(match, window))
continue;
if (store_match != NULL)
*store_match = match;
return child;
}
Con *result = con_for_window(child, window, store_match);
if (result != NULL)
return result;
}
TAILQ_FOREACH(child, &(con->floating_head), floating_windows) {
TAILQ_FOREACH(match, &(child->swallow_head), matches) {
if (!match_matches_window(match, window))
continue;
if (store_match != NULL)
*store_match = match;
return child;
}
Con *result = con_for_window(child, window, store_match);
if (result != NULL)
return result;
}
return NULL;
}
/*
* Returns the number of children of this container.
*
*/
int con_num_children(Con *con) {
Con *child;
int children = 0;
TAILQ_FOREACH(child, &(con->nodes_head), nodes)
children++;
return children;
}
/*
* Updates the percent attribute of the children of the given container. This
* function needs to be called when a window is added or removed from a
* container.
*
*/
void con_fix_percent(Con *con) {
Con *child;
int children = con_num_children(con);
// calculate how much we have distributed and how many containers
// with a percentage set we have
double total = 0.0;
int children_with_percent = 0;
TAILQ_FOREACH(child, &(con->nodes_head), nodes) {
if (child->percent > 0.0) {
total += child->percent;
++children_with_percent;
}
}
// if there were children without a percentage set, set to a value that
// will make those children proportional to all others
if (children_with_percent != children) {
TAILQ_FOREACH(child, &(con->nodes_head), nodes) {
if (child->percent <= 0.0) {
if (children_with_percent == 0)
total += (child->percent = 1.0);
else total += (child->percent = total / children_with_percent);
}
}
}
// if we got a zero, just distribute the space equally, otherwise
// distribute according to the proportions we got
if (total == 0.0) {
TAILQ_FOREACH(child, &(con->nodes_head), nodes)
child->percent = 1.0 / children;
} else if (total != 1.0) {
TAILQ_FOREACH(child, &(con->nodes_head), nodes)
child->percent /= total;
}
}
/*
* Toggles fullscreen mode for the given container. Fullscreen mode will not be
* entered when there already is a fullscreen container on this workspace.
*
*/
void con_toggle_fullscreen(Con *con, int fullscreen_mode) {
Con *workspace, *fullscreen;
if (con->type == CT_WORKSPACE) {
DLOG("You cannot make a workspace fullscreen.\n");
return;
}
DLOG("toggling fullscreen for %p / %s\n", con, con->name);
if (con->fullscreen_mode == CF_NONE) {
/* 1: check if there already is a fullscreen con */
if (fullscreen_mode == CF_GLOBAL)
fullscreen = con_get_fullscreen_con(croot, CF_GLOBAL);
else {
workspace = con_get_workspace(con);
fullscreen = con_get_fullscreen_con(workspace, CF_OUTPUT);
}
if (fullscreen != NULL) {
LOG("Not entering fullscreen mode, container (%p/%s) "
"already is in fullscreen mode\n",
fullscreen, fullscreen->name);
goto update_netwm_state;
}
/* 2: enable fullscreen */
con->fullscreen_mode = fullscreen_mode;
} else {
/* 1: disable fullscreen */
con->fullscreen_mode = CF_NONE;
}
update_netwm_state:
DLOG("mode now: %d\n", con->fullscreen_mode);
/* update _NET_WM_STATE if this container has a window */
/* TODO: when a window is assigned to a container which is already
* fullscreened, this state needs to be pushed to the client, too */
if (con->window == NULL)
return;
uint32_t values[1];
unsigned int num = 0;
if (con->fullscreen_mode != CF_NONE)
values[num++] = A__NET_WM_STATE_FULLSCREEN;
xcb_change_property(conn, XCB_PROP_MODE_REPLACE, con->window->id,
A__NET_WM_STATE, XCB_ATOM_ATOM, 32, num, values);
}
/*
* Moves the given container to the currently focused container on the given
* workspace.
*
* The fix_coordinates flag will translate the current coordinates (offset from
* the monitor position basically) to appropriate coordinates on the
* destination workspace.
* Not enabling this behaviour comes in handy when this function gets called by
* floating_maybe_reassign_ws, which will only "move" a floating window when it
* *already* changed its coordinates to a different output.
*
* The dont_warp flag disables pointer warping and will be set when this
* function is called while dragging a floating window.
*
* TODO: is there a better place for this function?
*
*/
void con_move_to_workspace(Con *con, Con *workspace, bool fix_coordinates, bool dont_warp) {
if (con->type == CT_WORKSPACE) {
DLOG("Moving workspaces is not yet implemented.\n");
return;
}
if (con_is_floating(con)) {
DLOG("Using FLOATINGCON instead\n");
con = con->parent;
}
Con *source_output = con_get_output(con),
*dest_output = con_get_output(workspace);
/* 1: save the container which is going to be focused after the current
* container is moved away */
Con *focus_next = con_next_focused(con);
/* 2: get the focused container of this workspace */
Con *next = con_descend_focused(workspace);
/* 3: we go up one level, but only when next is a normal container */
if (next->type != CT_WORKSPACE) {
DLOG("next originally = %p / %s / type %d\n", next, next->name, next->type);
next = next->parent;
}
/* 4: if the target container is floating, we get the workspace instead.
* Only tiling windows need to get inserted next to the current container.
* */
Con *floatingcon = con_inside_floating(next);
if (floatingcon != NULL) {
DLOG("floatingcon, going up even further\n");
next = floatingcon->parent;
}
if (con->type == CT_FLOATING_CON) {
Con *ws = con_get_workspace(next);
DLOG("This is a floating window, using workspace %p / %s\n", ws, ws->name);
next = ws;
}
if (source_output != dest_output) {
/* Take the relative coordinates of the current output, then add them
* to the coordinate space of the correct output */
if (fix_coordinates && con->type == CT_FLOATING_CON) {
DLOG("Floating window, fixing coordinates\n");
/* First we get the x/y coordinates relative to the x/y coordinates
* of the output on which the window is on */
uint32_t rel_x = (con->rect.x - source_output->rect.x);
uint32_t rel_y = (con->rect.y - source_output->rect.y);
/* Then we calculate a fraction, for example 0.63 for a window
* which is at y = 1212 of a 1920 px high output */
double fraction_x = ((double)rel_x / source_output->rect.width);
double fraction_y = ((double)rel_y / source_output->rect.height);
DLOG("rel_x = %d, rel_y = %d, fraction_x = %f, fraction_y = %f, output->w = %d, output->h = %d\n",
rel_x, rel_y, fraction_x, fraction_y, source_output->rect.width, source_output->rect.height);
con->rect.x = dest_output->rect.x + (fraction_x * dest_output->rect.width);
con->rect.y = dest_output->rect.y + (fraction_y * dest_output->rect.height);
DLOG("Resulting coordinates: x = %d, y = %d\n", con->rect.x, con->rect.y);
} else DLOG("Not fixing coordinates, fix_coordinates flag = %d\n", fix_coordinates);
/* If moving to a visible workspace, call show so it can be considered
* focused. Must do before attaching because workspace_show checks to see
* if focused container is in its area. */
if (workspace_is_visible(workspace)) {
workspace_show(workspace);
/* Don’t warp if told so (when dragging floating windows with the
* mouse for example) */
if (dont_warp)
x_set_warp_to(NULL);
else
x_set_warp_to(&(con->rect));
}
}
DLOG("Re-attaching container to %p / %s\n", next, next->name);
/* 5: re-attach the con to the parent of this focused container */
Con *parent = con->parent;
con_detach(con);
con_attach(con, next, false);
/* 6: fix the percentages */
con_fix_percent(parent);
con->percent = 0.0;
con_fix_percent(next);
/* 7: focus the con on the target workspace (the X focus is only updated by
* calling tree_render(), so for the "real" focus this is a no-op). */
con_focus(con_descend_focused(con));
/* 8: when moving to a visible workspace on a different output, we keep the
* con focused. Otherwise, we leave the focus on the current workspace as we
* don’t want to focus invisible workspaces */
if (source_output != dest_output &&
workspace_is_visible(workspace)) {
DLOG("Moved to a different output, focusing target\n");
} else {
/* Descend focus stack in case focus_next is a workspace which can
* occur if we move to the same workspace. Also show current workspace
* to ensure it is focused. */
workspace_show(con_get_workspace(focus_next));
con_focus(con_descend_focused(focus_next));
}
CALL(parent, on_remove_child);
}
/*
* Returns the orientation of the given container (for stacked containers,
* vertical orientation is used regardless of the actual orientation of the
* container).
*
*/
int con_orientation(Con *con) {
/* stacking containers behave like they are in vertical orientation */
if (con->layout == L_STACKED)
return VERT;
if (con->layout == L_TABBED)
return HORIZ;
return con->orientation;
}
/*
* Returns the container which will be focused next when the given container
* is not available anymore. Called in tree_close and con_move_to_workspace
* to properly restore focus.
*
*/
Con *con_next_focused(Con *con) {
Con *next;
/* floating containers are attached to a workspace, so we focus either the
* next floating container (if any) or the workspace itself. */
if (con->type == CT_FLOATING_CON) {
DLOG("selecting next for CT_FLOATING_CON\n");
next = TAILQ_NEXT(con, floating_windows);
DLOG("next = %p\n", next);
if (!next) {
next = TAILQ_PREV(con, floating_head, floating_windows);
DLOG("using prev, next = %p\n", next);
}
if (!next) {
Con *ws = con_get_workspace(con);
next = ws;
DLOG("no more floating containers for next = %p, restoring workspace focus\n", next);
while (next != TAILQ_END(&(ws->focus_head)) && !TAILQ_EMPTY(&(next->focus_head))) {
next = TAILQ_FIRST(&(next->focus_head));
if (next == con) {
DLOG("skipping container itself, we want the next client\n");
next = TAILQ_NEXT(next, focused);
}
}
if (next == TAILQ_END(&(ws->focus_head))) {
DLOG("Focus list empty, returning ws\n");
next = ws;
}
} else {
/* Instead of returning the next CT_FLOATING_CON, we descend it to
* get an actual window to focus. */
next = con_descend_focused(next);
}
return next;
}
/* dock clients cannot be focused, so we focus the workspace instead */
if (con->parent->type == CT_DOCKAREA) {
DLOG("selecting workspace for dock client\n");
return con_descend_focused(output_get_content(con->parent->parent));
}
/* if 'con' is not the first entry in the focus stack, use the first one as
* it’s currently focused already */
Con *first = TAILQ_FIRST(&(con->parent->focus_head));
if (first != con) {
DLOG("Using first entry %p\n", first);
next = first;
} else {
/* try to focus the next container on the same level as this one or fall
* back to its parent */
if (!(next = TAILQ_NEXT(con, focused)))
next = con->parent;
}
/* now go down the focus stack as far as
* possible, excluding the current container */
while (!TAILQ_EMPTY(&(next->focus_head)) &&
TAILQ_FIRST(&(next->focus_head)) != con)
next = TAILQ_FIRST(&(next->focus_head));
return next;
}
/*
* Get the next/previous container in the specified orientation. This may
* travel up until it finds a container with suitable orientation.
*
*/
Con *con_get_next(Con *con, char way, orientation_t orientation) {
DLOG("con_get_next(way=%c, orientation=%d)\n", way, orientation);
/* 1: get the first parent with the same orientation */
Con *cur = con;
while (con_orientation(cur->parent) != orientation) {
DLOG("need to go one level further up\n");
if (cur->parent->type == CT_WORKSPACE) {
LOG("that's a workspace, we can't go further up\n");
return NULL;
}
cur = cur->parent;
}
/* 2: chose next (or previous) */
Con *next;
if (way == 'n') {
next = TAILQ_NEXT(cur, nodes);
/* if we are at the end of the list, we need to wrap */
if (next == TAILQ_END(&(parent->nodes_head)))
return NULL;
} else {
next = TAILQ_PREV(cur, nodes_head, nodes);
/* if we are at the end of the list, we need to wrap */
if (next == TAILQ_END(&(cur->nodes_head)))
return NULL;
}
DLOG("next = %p\n", next);
return next;
}
/*
* Returns the focused con inside this client, descending the tree as far as
* possible. This comes in handy when attaching a con to a workspace at the
* currently focused position, for example.
*
*/
Con *con_descend_focused(Con *con) {
Con *next = con;
while (!TAILQ_EMPTY(&(next->focus_head)))
next = TAILQ_FIRST(&(next->focus_head));
return next;
}
/*
* Returns the focused con inside this client, descending the tree as far as
* possible. This comes in handy when attaching a con to a workspace at the
* currently focused position, for example.
*
* Works like con_descend_focused but considers only tiling cons.
*
*/
Con *con_descend_tiling_focused(Con *con) {
Con *next = con;
Con *before;
Con *child;
do {
before = next;
TAILQ_FOREACH(child, &(next->focus_head), focused) {
if (child->type == CT_FLOATING_CON)
continue;
next = child;
break;
}
} while (before != next);
return next;
}
/*
* Returns the leftmost, rightmost, etc. container in sub-tree. For example, if
* direction is D_LEFT, then we return the rightmost container and if direction
* is D_RIGHT, we return the leftmost container. This is because if we are
* moving D_LEFT, and thus want the rightmost container.
*
*/
Con *con_descend_direction(Con *con, direction_t direction) {
Con *most = NULL;
int orientation = con_orientation(con);
DLOG("con_descend_direction(%p, orientation %d, direction %d)\n", con, orientation, direction);
if (direction == D_LEFT || direction == D_RIGHT) {
if (orientation == HORIZ) {
/* If the direction is horizontal, we can use either the first
* (D_RIGHT) or the last con (D_LEFT) */
if (direction == D_RIGHT)
most = TAILQ_FIRST(&(con->nodes_head));
else most = TAILQ_LAST(&(con->nodes_head), nodes_head);
} else if (orientation == VERT) {
/* Wrong orientation. We use the last focused con. Within that con,
* we recurse to chose the left/right con or at least the last
* focused one. */
most = TAILQ_FIRST(&(con->focus_head));
} else {
/* If the con has no orientation set, it’s not a split container
* but a container with a client window, so stop recursing */
return con;
}
}
if (direction == D_UP || direction == D_DOWN) {
if (orientation == VERT) {
/* If the direction is vertical, we can use either the first
* (D_DOWN) or the last con (D_UP) */
if (direction == D_UP)
most = TAILQ_LAST(&(con->nodes_head), nodes_head);
else most = TAILQ_FIRST(&(con->nodes_head));
} else if (orientation == HORIZ) {
/* Wrong orientation. We use the last focused con. Within that con,
* we recurse to chose the top/bottom con or at least the last
* focused one. */
most = TAILQ_FIRST(&(con->focus_head));
} else {
/* If the con has no orientation set, it’s not a split container
* but a container with a client window, so stop recursing */
return con;
}
}
if (!most)
return con;
return con_descend_direction(most, direction);
}
/*
* Returns a "relative" Rect which contains the amount of pixels that need to
* be added to the original Rect to get the final position (obviously the
* amount of pixels for normal, 1pixel and borderless are different).
*
*/
Rect con_border_style_rect(Con *con) {
switch (con_border_style(con)) {
case BS_NORMAL:
return (Rect){2, 0, -(2 * 2), -2};
case BS_1PIXEL:
return (Rect){1, 1, -2, -2};
case BS_NONE:
return (Rect){0, 0, 0, 0};
default:
assert(false);
}
}
/*
* Use this function to get a container’s border style. This is important
* because when inside a stack, the border style is always BS_NORMAL.
* For tabbed mode, the same applies, with one exception: when the container is
* borderless and the only element in the tabbed container, the border is not
* rendered.
*
* For children of a CT_DOCKAREA, the border style is always none.
*
*/
int con_border_style(Con *con) {
Con *fs = con_get_fullscreen_con(con->parent, CF_OUTPUT);
if (fs == con) {
DLOG("this one is fullscreen! overriding BS_NONE\n");
return BS_NONE;
}
if (con->parent->layout == L_STACKED)
return (con_num_children(con->parent) == 1 ? con->border_style : BS_NORMAL);
if (con->parent->layout == L_TABBED && con->border_style != BS_NORMAL)
return (con_num_children(con->parent) == 1 ? con->border_style : BS_NORMAL);
if (con->parent->type == CT_DOCKAREA)
return BS_NONE;
return con->border_style;
}
/*
* This function changes the layout of a given container. Use it to handle
* special cases like changing a whole workspace to stacked/tabbed (creates a
* new split container before).
*
*/
void con_set_layout(Con *con, int layout) {
/* When the container type is CT_WORKSPACE, the user wants to change the
* whole workspace into stacked/tabbed mode. To do this and still allow
* intuitive operations (like level-up and then opening a new window), we
* need to create a new split container. */
if (con->type == CT_WORKSPACE) {
DLOG("Creating new split container\n");
/* 1: create a new split container */
Con *new = con_new(NULL, NULL);
new->parent = con;
/* 2: set the requested layout on the split con */
new->layout = layout;
/* 3: While the layout is irrelevant in stacked/tabbed mode, it needs
* to be set. Otherwise, this con will not be interpreted as a split
* container. */
if (config.default_orientation == NO_ORIENTATION) {
new->orientation = (con->rect.height > con->rect.width) ? VERT : HORIZ;
} else {
new->orientation = config.default_orientation;
}
Con *old_focused = TAILQ_FIRST(&(con->focus_head));
if (old_focused == TAILQ_END(&(con->focus_head)))
old_focused = NULL;
/* 4: move the existing cons of this workspace below the new con */
DLOG("Moving cons\n");
Con *child;
while (!TAILQ_EMPTY(&(con->nodes_head))) {
child = TAILQ_FIRST(&(con->nodes_head));
con_detach(child);
con_attach(child, new, true);
}
/* 4: attach the new split container to the workspace */
DLOG("Attaching new split to ws\n");
con_attach(new, con, false);
if (old_focused)
con_focus(old_focused);
tree_flatten(croot);
return;
}
con->layout = layout;
}
/*
* Callback which will be called when removing a child from the given con.
* Kills the container if it is empty and replaces it with the child if there
* is exactly one child.
*
*/
static void con_on_remove_child(Con *con) {
DLOG("on_remove_child\n");
/* Every container 'above' (in the hierarchy) the workspace content should
* not be closed when the last child was removed */
if (con->type == CT_OUTPUT ||
con->type == CT_ROOT ||
con->type == CT_DOCKAREA) {
DLOG("not handling, type = %d\n", con->type);
return;
}
/* For workspaces, close them only if they're not visible anymore */
if (con->type == CT_WORKSPACE) {
int children = con_num_children(con);
if (children == 0 && !workspace_is_visible(con)) {
LOG("Closing old workspace (%p / %s), it is empty\n", con, con->name);
tree_close(con, DONT_KILL_WINDOW, false, false);
ipc_send_event("workspace", I3_IPC_EVENT_WORKSPACE, "{\"change\":\"empty\"}");
ewmh_update_workarea();
}
return;
}
/* TODO: check if this container would swallow any other client and
* don’t close it automatically. */
int children = con_num_children(con);
if (children == 0) {
DLOG("Container empty, closing\n");
tree_close(con, DONT_KILL_WINDOW, false, false);
return;
}
}
/*
* Determines the minimum size of the given con by looking at its children (for
* split/stacked/tabbed cons). Will be called when resizing floating cons
*
*/
Rect con_minimum_size(Con *con) {
DLOG("Determining minimum size for con %p\n", con);
if (con_is_leaf(con)) {
DLOG("leaf node, returning 75x50\n");
return (Rect){ 0, 0, 75, 50 };
}
if (con->type == CT_FLOATING_CON) {
DLOG("floating con\n");
Con *child = TAILQ_FIRST(&(con->nodes_head));
return con_minimum_size(child);
}
if (con->layout == L_STACKED || con->layout == L_TABBED) {
uint32_t max_width = 0, max_height = 0, deco_height = 0;
Con *child;
TAILQ_FOREACH(child, &(con->nodes_head), nodes) {
Rect min = con_minimum_size(child);
deco_height += child->deco_rect.height;
max_width = max(max_width, min.width);
max_height = max(max_height, min.height);
}
DLOG("stacked/tabbed now, returning %d x %d + deco_rect = %d\n",
max_width, max_height, deco_height);
return (Rect){ 0, 0, max_width, max_height + deco_height };
}
/* For horizontal/vertical split containers we sum up the width (h-split)
* or height (v-split) and use the maximum of the height (h-split) or width
* (v-split) as minimum size. */
if (con->orientation == HORIZ || con->orientation == VERT) {
uint32_t width = 0, height = 0;
Con *child;
TAILQ_FOREACH(child, &(con->nodes_head), nodes) {
Rect min = con_minimum_size(child);
if (con->orientation == HORIZ) {
width += min.width;
height = max(height, min.height);
} else {
height += min.height;
width = max(width, min.width);
}
}
DLOG("split container, returning width = %d x height = %d\n", width, height);
return (Rect){ 0, 0, width, height };
}
ELOG("Unhandled case, type = %d, layout = %d, orientation = %d\n",
con->type, con->layout, con->orientation);
assert(false);
}