resize.c - tmux - Rivoreo Source Code Repositories

 /* $OpenBSD$ */

 /*
  * Copyright (c) 2007 Nicholas Marriott <nicholas.marriott@gmail.com>
  *
  * Permission to use, copy, modify, and distribute this software for any
  * purpose with or without fee is hereby granted, provided that the above
  * copyright notice and this permission notice appear in all copies.
  *
  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
  * WHATSOEVER RESULTING FROM LOSS OF MIND, USE, DATA OR PROFITS, WHETHER
  * IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING
  * OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  */

 #include <sys/types.h>

 #include <string.h>

 #include "tmux.h"

 void
 resize_window(struct window *w, u_int sx, u_int sy, int xpixel, int ypixel)
 {
 	int	zoomed;

 	/* Check size limits. */
 	if (sx < WINDOW_MINIMUM)
 		sx = WINDOW_MINIMUM;
 	if (sx > WINDOW_MAXIMUM)
 		sx = WINDOW_MAXIMUM;
 	if (sy < WINDOW_MINIMUM)
 		sy = WINDOW_MINIMUM;
 	if (sy > WINDOW_MAXIMUM)
 		sy = WINDOW_MAXIMUM;

 	/* If the window is zoomed, unzoom. */
 	zoomed = w->flags & WINDOW_ZOOMED;
 	if (zoomed)
 		window_unzoom(w);

 	/* Resize the layout first. */
 	layout_resize(w, sx, sy);

 	/* Resize the window, it can be no smaller than the layout. */
 	if (sx < w->layout_root->sx)
 		sx = w->layout_root->sx;
 	if (sy < w->layout_root->sy)
 		sy = w->layout_root->sy;
 	window_resize(w, sx, sy, xpixel, ypixel);
 	log_debug("%s: @%u resized to %u,%u; layout %u,%u", __func__, w->id,
 	    sx, sy, w->layout_root->sx, w->layout_root->sy);

 	/* Restore the window zoom state. */
 	if (zoomed)
 		window_zoom(w->active);

 	tty_update_window_offset(w);
 	server_redraw_window(w);
 	notify_window("window-layout-changed", w);
 	w->flags &= ~WINDOW_RESIZE;
 }

 static int
 ignore_client_size(struct client *c)
 {
 	struct client	*loop;

 	if (c->session == NULL)
 		return (1);
 	if (c->flags & CLIENT_NOSIZEFLAGS)
 		return (1);
 	if (c->flags & CLIENT_IGNORESIZE) {
 		/*
 		 * Ignore flagged clients if there are any attached clients
 		 * that aren't flagged.
 		 */
 		TAILQ_FOREACH (loop, &clients, entry) {
 			if (loop->session == NULL)
 				continue;
 			if (loop->flags & CLIENT_NOSIZEFLAGS)
 				continue;
 			if (~loop->flags & CLIENT_IGNORESIZE)
 				return (1);
 		}
 	}
 	if ((c->flags & CLIENT_CONTROL) && (~c->flags & CLIENT_SIZECHANGED))
 		return (1);
 	return (0);
 }

 static u_int
 clients_with_window(struct window *w)
 {
 	struct client	*loop;
 	u_int		 n = 0;

 	TAILQ_FOREACH(loop, &clients, entry) {
 		if (ignore_client_size(loop) || !session_has(loop->session, w))
 			continue;
 		if (++n > 1)
 			break;
 	}
 	return (n);
 }

 static int
 clients_calculate_size(int type, int current, struct client *c,
     struct session *s, struct window *w, int (*skip_client)(struct client *,
     int, int, struct session *, struct window *), u_int *sx, u_int *sy,
     u_int *xpixel, u_int *ypixel)
 {
 	struct client	*loop;
 	u_int		 cx, cy, n = 0;

 	/* Manual windows do not have their size changed based on a client. */
 	if (type == WINDOW_SIZE_MANUAL) {
 		log_debug("%s: type is manual", __func__);
 		return (0);
 	}

 	/*
 	 * Start comparing with 0 for largest and UINT_MAX for smallest or
 	 * latest.
 	 */
 	if (type == WINDOW_SIZE_LARGEST)
 		*sx = *sy = 0;
 	else
 		*sx = *sy = UINT_MAX;
 	*xpixel = *ypixel = 0;

 	/*
 	 * For latest, count the number of clients with this window. We only
 	 * care if there is more than one.
 	 */
 	if (type == WINDOW_SIZE_LATEST)
 		n = clients_with_window(w);

 	/* Loop over the clients and work out the size. */
 	TAILQ_FOREACH(loop, &clients, entry) {
 		if (loop != c && ignore_client_size(loop)) {
 			log_debug("%s: ignoring %s", __func__, loop->name);
 			continue;
 		}
 		if (loop != c && skip_client(loop, type, current, s, w)) {
 			log_debug("%s: skipping %s", __func__, loop->name);
 			continue;
 		}

 		/*
 		 * If there are multiple clients attached, only accept the
 		 * latest client; otherwise let the only client be chosen as
 		 * for smallest.
 		 */
 		if (type == WINDOW_SIZE_LATEST && n > 1 && loop != w->latest) {
 			log_debug("%s: %s is not latest", __func__, loop->name);
 			continue;
 		}

 		/* Work out this client's size. */
 		cx = loop->tty.sx;
 		cy = loop->tty.sy - status_line_size(loop);

 		/*
 		 * If it is larger or smaller than the best so far, update the
 		 * new size.
 		 */
 		if (type == WINDOW_SIZE_LARGEST) {
 			if (cx > *sx)
 				*sx = cx;
 			if (cy > *sy)
 				*sy = cy;
 		} else {
 			if (cx < *sx)
 				*sx = cx;
 			if (cy < *sy)
 				*sy = cy;
 		}
 		if (loop->tty.xpixel > *xpixel && loop->tty.ypixel > *ypixel) {
 			*xpixel = loop->tty.xpixel;
 			*ypixel = loop->tty.ypixel;
 		}
 		log_debug("%s: after %s (%ux%u), size is %ux%u", __func__,
 		    loop->name, cx, cy, *sx, *sy);
 	}

 	/* Return whether a suitable size was found. */
 	if (type == WINDOW_SIZE_LARGEST) {
 		log_debug("%s: type is largest", __func__);
 		return (*sx != 0 && *sy != 0);
 	}
 	if (type == WINDOW_SIZE_LATEST)
 		log_debug("%s: type is latest", __func__);
 	else
 		log_debug("%s: type is smallest", __func__);
 	return (*sx != UINT_MAX && *sy != UINT_MAX);
 }

 static int
 default_window_size_skip_client(struct client *loop, int type,
     __unused int current, struct session *s, struct window *w)
 {
 	/*
 	 * Latest checks separately, so do not check here. Otherwise only
 	 * include clients where the session contains the window or where the
 	 * session is the given session.
 	 */
 	if (type == WINDOW_SIZE_LATEST)
 		return (0);
 	if (w != NULL && !session_has(loop->session, w))
 		return (1);
 	if (w == NULL && loop->session != s)
 		return (1);
 	return (0);
 }

 void
 default_window_size(struct client *c, struct session *s, struct window *w,
 	u_int *sx, u_int *sy, u_int *xpixel, u_int *ypixel, int type)
 {
 	const char	*value;

 	/* Get type if not provided. */
 	if (type == -1)
 		type = options_get_number(global_w_options, "window-size");

 	/*
 	 * Latest clients can use the given client if suitable. If there is no
 	 * client and no window, use the default size as for manual type.
 	 */
 	if (type == WINDOW_SIZE_LATEST) {
 		if (c != NULL && !ignore_client_size(c)) {
 			*sx = c->tty.sx;
 			*sy = c->tty.sy - status_line_size(c);
 			*xpixel = c->tty.xpixel;
 			*ypixel = c->tty.ypixel;
 			log_debug("%s: using %ux%u from %s", __func__, *sx, *sy,
 			    c->name);
 			goto done;
 		}
 	}

 	/*
 	 * Look for a client to base the size on. If none exists (or the type
 	 * is manual), use the default-size option.
 	 */
 	if (!clients_calculate_size(type, 0, c, s, w,
 	    default_window_size_skip_client, sx, sy, xpixel, ypixel)) {
 		value = options_get_string(s->options, "default-size");
 		if (sscanf(value, "%ux%u", sx, sy) != 2) {
 			*sx = 80;
 			*sy = 24;
 		}
 		log_debug("%s: using %ux%u from default-size", __func__, *sx,
 		    *sy);
 	}

 done:
 	/* Make sure the limits are enforced. */
 	if (*sx < WINDOW_MINIMUM)
 		*sx = WINDOW_MINIMUM;
 	if (*sx > WINDOW_MAXIMUM)
 		*sx = WINDOW_MAXIMUM;
 	if (*sy < WINDOW_MINIMUM)
 		*sy = WINDOW_MINIMUM;
 	if (*sy > WINDOW_MAXIMUM)
 		*sy = WINDOW_MAXIMUM;
 	log_debug("%s: resulting size is %ux%u", __func__, *sx, *sy);
 }

 static int
 recalculate_size_skip_client(struct client *loop, __unused int type,
     int current, __unused struct session *s, struct window *w)
 {
 	/*
 	 * If the current flag is set, then skip any client where this window
 	 * is not the current window - this is used for aggressive-resize.
 	 * Otherwise skip any session that doesn't contain the window.
 	 */
 	if (current)
 		return (loop->session->curw->window != w);
 	return (session_has(loop->session, w) == 0);
 }

 void
 recalculate_size(struct window *w, int now)
 {
 	u_int	sx, sy, xpixel = 0, ypixel = 0;
 	int	type, current, changed;

 	/*
 	 * Do not attempt to resize windows which have no pane, they must be on
 	 * the way to destruction.
 	 */
 	if (w->active == NULL)
 		return;
 	log_debug("%s: @%u is %u,%u", __func__, w->id, w->sx, w->sy);

 	/*
 	 * Type is manual, smallest, largest, latest. Current is the
 	 * aggressive-resize option (do not resize based on clients where the
 	 * window is not the current window).
 	 */
 	type = options_get_number(w->options, "window-size");
 	current = options_get_number(w->options, "aggressive-resize");

 	/* Look for a suitable client and get the new size. */
 	changed = clients_calculate_size(type, current, NULL, NULL, w,
 	    recalculate_size_skip_client, &sx, &sy, &xpixel, &ypixel);

 	/*
 	 * Make sure the size has actually changed. If the window has already
 	 * got a resize scheduled, then use the new size; otherwise the old.
 	 */
 	if (w->flags & WINDOW_RESIZE) {
 		if (!now && changed && w->new_sx == sx && w->new_sy == sy)
 			changed = 0;
 	} else {
 		if (!now && changed && w->sx == sx && w->sy == sy)
 			changed = 0;
 	}

 	/*
 	 * If the size hasn't changed, update the window offset but not the
 	 * size.
 	 */
 	if (!changed) {
 		tty_update_window_offset(w);
 		return;
 	}

 	/*
 	 * If the now flag is set or if the window is sized manually, change
 	 * the size immediately. Otherwise set the flag and it will be done
 	 * later.
 	 */
 	log_debug("%s: @%u new size %u,%u", __func__, w->id, sx, sy);
 	if (now || type == WINDOW_SIZE_MANUAL)
 		resize_window(w, sx, sy, xpixel, ypixel);
 	else {
 		w->new_sx = sx;
 		w->new_sy = sy;
 		w->new_xpixel = xpixel;
 		w->new_ypixel = ypixel;

 		w->flags |= WINDOW_RESIZE;
 		tty_update_window_offset(w);
 	}
 }

 void
 recalculate_sizes(void)
 {
 	recalculate_sizes_now(0);
 }

 void
 recalculate_sizes_now(int now)
 {
 	struct session	*s;
 	struct client	*c;
 	struct window	*w;

 	/*
 	 * Clear attached count and update saved status line information for
 	 * each session.
 	 */
 	RB_FOREACH(s, sessions, &sessions) {
 		s->attached = 0;
 		status_update_cache(s);
 	}

 	/*
 	 * Increment attached count and check the status line size for each
 	 * client.
 	 */
 	TAILQ_FOREACH(c, &clients, entry) {
 		s = c->session;
 		if (s != NULL && !(c->flags & CLIENT_UNATTACHEDFLAGS))
 			s->attached++;
 		if (ignore_client_size(c))
 			continue;
 		if (c->tty.sy <= s->statuslines || (c->flags & CLIENT_CONTROL))
 			c->flags |= CLIENT_STATUSOFF;
 		else
 			c->flags &= ~CLIENT_STATUSOFF;
 	}

 	/* Walk each window and adjust the size. */
 	RB_FOREACH(w, windows, &windows)
 		recalculate_size(w, now);
 }
	/* $OpenBSD$ */

	/*
	* Copyright (c) 2007 Nicholas Marriott <nicholas.marriott@gmail.com>
	*
	* Permission to use, copy, modify, and distribute this software for any
	* purpose with or without fee is hereby granted, provided that the above
	* copyright notice and this permission notice appear in all copies.
	*
	* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
	* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
	* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
	* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
	* WHATSOEVER RESULTING FROM LOSS OF MIND, USE, DATA OR PROFITS, WHETHER
	* IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING
	* OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
	*/

	#include <sys/types.h>

	#include <string.h>

	#include "tmux.h"

	void
	resize_window(struct window *w, u_int sx, u_int sy, int xpixel, int ypixel)
	{
	int zoomed;

	/* Check size limits. */
	if (sx < WINDOW_MINIMUM)
	sx = WINDOW_MINIMUM;
	if (sx > WINDOW_MAXIMUM)
	sx = WINDOW_MAXIMUM;
	if (sy < WINDOW_MINIMUM)
	sy = WINDOW_MINIMUM;
	if (sy > WINDOW_MAXIMUM)
	sy = WINDOW_MAXIMUM;

	/* If the window is zoomed, unzoom. */
	zoomed = w->flags & WINDOW_ZOOMED;
	if (zoomed)
	window_unzoom(w);

	/* Resize the layout first. */
	layout_resize(w, sx, sy);

	/* Resize the window, it can be no smaller than the layout. */
	if (sx < w->layout_root->sx)
	sx = w->layout_root->sx;
	if (sy < w->layout_root->sy)
	sy = w->layout_root->sy;
	window_resize(w, sx, sy, xpixel, ypixel);
	log_debug("%s: @%u resized to %u,%u; layout %u,%u", __func__, w->id,
	sx, sy, w->layout_root->sx, w->layout_root->sy);

	/* Restore the window zoom state. */
	if (zoomed)
	window_zoom(w->active);

	tty_update_window_offset(w);
	server_redraw_window(w);
	notify_window("window-layout-changed", w);
	w->flags &= ~WINDOW_RESIZE;
	}

	static int
	ignore_client_size(struct client *c)
	{
	struct client *loop;

	if (c->session == NULL)
	return (1);
	if (c->flags & CLIENT_NOSIZEFLAGS)
	return (1);
	if (c->flags & CLIENT_IGNORESIZE) {
	/*
	* Ignore flagged clients if there are any attached clients
	* that aren't flagged.
	*/
	TAILQ_FOREACH (loop, &clients, entry) {
	if (loop->session == NULL)
	continue;
	if (loop->flags & CLIENT_NOSIZEFLAGS)
	continue;
	if (~loop->flags & CLIENT_IGNORESIZE)
	return (1);
	}
	}
	if ((c->flags & CLIENT_CONTROL) && (~c->flags & CLIENT_SIZECHANGED))
	return (1);
	return (0);
	}

	static u_int
	clients_with_window(struct window *w)
	{
	struct client *loop;
	u_int n = 0;

	TAILQ_FOREACH(loop, &clients, entry) {
	if (ignore_client_size(loop) \|\| !session_has(loop->session, w))
	continue;
	if (++n > 1)
	break;
	}
	return (n);
	}

	static int
	clients_calculate_size(int type, int current, struct client *c,
	struct session s, struct window w, int (skip_client)(struct client ,
	int, int, struct session , struct window ), u_int sx, u_int sy,
	u_int xpixel, u_int ypixel)
	{
	struct client *loop;
	u_int cx, cy, n = 0;

	/* Manual windows do not have their size changed based on a client. */
	if (type == WINDOW_SIZE_MANUAL) {
	log_debug("%s: type is manual", __func__);
	return (0);
	}

	/*
	* Start comparing with 0 for largest and UINT_MAX for smallest or
	* latest.
	*/
	if (type == WINDOW_SIZE_LARGEST)
	sx = sy = 0;
	else
	sx = sy = UINT_MAX;
	xpixel = ypixel = 0;

	/*
	* For latest, count the number of clients with this window. We only
	* care if there is more than one.
	*/
	if (type == WINDOW_SIZE_LATEST)
	n = clients_with_window(w);

	/* Loop over the clients and work out the size. */
	TAILQ_FOREACH(loop, &clients, entry) {
	if (loop != c && ignore_client_size(loop)) {
	log_debug("%s: ignoring %s", __func__, loop->name);
	continue;
	}
	if (loop != c && skip_client(loop, type, current, s, w)) {
	log_debug("%s: skipping %s", __func__, loop->name);
	continue;
	}

	/*
	* If there are multiple clients attached, only accept the
	* latest client; otherwise let the only client be chosen as
	* for smallest.
	*/
	if (type == WINDOW_SIZE_LATEST && n > 1 && loop != w->latest) {
	log_debug("%s: %s is not latest", __func__, loop->name);
	continue;
	}

	/* Work out this client's size. */
	cx = loop->tty.sx;
	cy = loop->tty.sy - status_line_size(loop);

	/*
	* If it is larger or smaller than the best so far, update the
	* new size.
	*/
	if (type == WINDOW_SIZE_LARGEST) {
	if (cx > *sx)
	*sx = cx;
	if (cy > *sy)
	*sy = cy;
	} else {
	if (cx < *sx)
	*sx = cx;
	if (cy < *sy)
	*sy = cy;
	}
	if (loop->tty.xpixel > xpixel && loop->tty.ypixel > ypixel) {
	*xpixel = loop->tty.xpixel;
	*ypixel = loop->tty.ypixel;
	}
	log_debug("%s: after %s (%ux%u), size is %ux%u", __func__,
	loop->name, cx, cy, sx, sy);
	}

	/* Return whether a suitable size was found. */
	if (type == WINDOW_SIZE_LARGEST) {
	log_debug("%s: type is largest", __func__);
	return (sx != 0 && sy != 0);
	}
	if (type == WINDOW_SIZE_LATEST)
	log_debug("%s: type is latest", __func__);
	else
	log_debug("%s: type is smallest", __func__);
	return (sx != UINT_MAX && sy != UINT_MAX);
	}

	static int
	default_window_size_skip_client(struct client *loop, int type,
	__unused int current, struct session s, struct window w)
	{
	/*
	* Latest checks separately, so do not check here. Otherwise only
	* include clients where the session contains the window or where the
	* session is the given session.
	*/
	if (type == WINDOW_SIZE_LATEST)
	return (0);
	if (w != NULL && !session_has(loop->session, w))
	return (1);
	if (w == NULL && loop->session != s)
	return (1);
	return (0);
	}

	void
	default_window_size(struct client c, struct session s, struct window *w,
	u_int sx, u_int sy, u_int xpixel, u_int ypixel, int type)
	{
	const char *value;

	/* Get type if not provided. */
	if (type == -1)
	type = options_get_number(global_w_options, "window-size");

	/*
	* Latest clients can use the given client if suitable. If there is no
	* client and no window, use the default size as for manual type.
	*/
	if (type == WINDOW_SIZE_LATEST) {
	if (c != NULL && !ignore_client_size(c)) {
	*sx = c->tty.sx;
	*sy = c->tty.sy - status_line_size(c);
	*xpixel = c->tty.xpixel;
	*ypixel = c->tty.ypixel;
	log_debug("%s: using %ux%u from %s", __func__, sx, sy,
	c->name);
	goto done;
	}
	}

	/*
	* Look for a client to base the size on. If none exists (or the type
	* is manual), use the default-size option.
	*/
	if (!clients_calculate_size(type, 0, c, s, w,
	default_window_size_skip_client, sx, sy, xpixel, ypixel)) {
	value = options_get_string(s->options, "default-size");
	if (sscanf(value, "%ux%u", sx, sy) != 2) {
	*sx = 80;
	*sy = 24;
	}
	log_debug("%s: using %ux%u from default-size", __func__, *sx,
	*sy);
	}

	done:
	/* Make sure the limits are enforced. */
	if (*sx < WINDOW_MINIMUM)
	*sx = WINDOW_MINIMUM;
	if (*sx > WINDOW_MAXIMUM)
	*sx = WINDOW_MAXIMUM;
	if (*sy < WINDOW_MINIMUM)
	*sy = WINDOW_MINIMUM;
	if (*sy > WINDOW_MAXIMUM)
	*sy = WINDOW_MAXIMUM;
	log_debug("%s: resulting size is %ux%u", __func__, sx, sy);
	}

	static int
	recalculate_size_skip_client(struct client *loop, __unused int type,
	int current, __unused struct session s, struct window w)
	{
	/*
	* If the current flag is set, then skip any client where this window
	* is not the current window - this is used for aggressive-resize.
	* Otherwise skip any session that doesn't contain the window.
	*/
	if (current)
	return (loop->session->curw->window != w);
	return (session_has(loop->session, w) == 0);
	}

	void
	recalculate_size(struct window *w, int now)
	{
	u_int sx, sy, xpixel = 0, ypixel = 0;
	int type, current, changed;

	/*
	* Do not attempt to resize windows which have no pane, they must be on
	* the way to destruction.
	*/
	if (w->active == NULL)
	return;
	log_debug("%s: @%u is %u,%u", __func__, w->id, w->sx, w->sy);

	/*
	* Type is manual, smallest, largest, latest. Current is the
	* aggressive-resize option (do not resize based on clients where the
	* window is not the current window).
	*/
	type = options_get_number(w->options, "window-size");
	current = options_get_number(w->options, "aggressive-resize");

	/* Look for a suitable client and get the new size. */
	changed = clients_calculate_size(type, current, NULL, NULL, w,
	recalculate_size_skip_client, &sx, &sy, &xpixel, &ypixel);

	/*
	* Make sure the size has actually changed. If the window has already
	* got a resize scheduled, then use the new size; otherwise the old.
	*/
	if (w->flags & WINDOW_RESIZE) {
	if (!now && changed && w->new_sx == sx && w->new_sy == sy)
	changed = 0;
	} else {
	if (!now && changed && w->sx == sx && w->sy == sy)
	changed = 0;
	}

	/*
	* If the size hasn't changed, update the window offset but not the
	* size.
	*/
	if (!changed) {
	tty_update_window_offset(w);
	return;
	}

	/*
	* If the now flag is set or if the window is sized manually, change
	* the size immediately. Otherwise set the flag and it will be done
	* later.
	*/
	log_debug("%s: @%u new size %u,%u", __func__, w->id, sx, sy);
	if (now \|\| type == WINDOW_SIZE_MANUAL)
	resize_window(w, sx, sy, xpixel, ypixel);
	else {
	w->new_sx = sx;
	w->new_sy = sy;
	w->new_xpixel = xpixel;
	w->new_ypixel = ypixel;

	w->flags \|= WINDOW_RESIZE;
	tty_update_window_offset(w);
	}
	}

	void
	recalculate_sizes(void)
	{
	recalculate_sizes_now(0);
	}

	void
	recalculate_sizes_now(int now)
	{
	struct session *s;
	struct client *c;
	struct window *w;

	/*
	* Clear attached count and update saved status line information for
	* each session.
	*/
	RB_FOREACH(s, sessions, &sessions) {
	s->attached = 0;
	status_update_cache(s);
	}

	/*
	* Increment attached count and check the status line size for each
	* client.
	*/
	TAILQ_FOREACH(c, &clients, entry) {
	s = c->session;
	if (s != NULL && !(c->flags & CLIENT_UNATTACHEDFLAGS))
	s->attached++;
	if (ignore_client_size(c))
	continue;
	if (c->tty.sy <= s->statuslines \|\| (c->flags & CLIENT_CONTROL))
	c->flags \|= CLIENT_STATUSOFF;
	else
	c->flags &= ~CLIENT_STATUSOFF;
	}

	/* Walk each window and adjust the size. */
	RB_FOREACH(w, windows, &windows)
	recalculate_size(w, now);
	}