path: root/resize.c

/* $OpenBSD$ */

/*
 * 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, 1);

	/* 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 %ux%u; layout %ux%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);
	notify_window("window-resized", 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) &&
	    (~c->flags & CLIENT_WINDOWSIZECHANGED))
		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;
	struct client_window	*cw;
	u_int			 cx, cy, n = 0;

	/*
	 * Start comparing with 0 for largest and UINT_MAX for smallest or
	 * latest.
	 */
	if (type == WINDOW_SIZE_LARGEST) {
		*sx = 0;
		*sy = 0;
	} else if (type == WINDOW_SIZE_MANUAL) {
		*sx = w->manual_sx;
		*sy = w->manual_sy;
		log_debug("%s: manual size %ux%u", __func__, *sx, *sy);
	} else {
		*sx = UINT_MAX;
		*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 && w != NULL)
		n = clients_with_window(w);

	/* Skip setting the size if manual */
	if (type == WINDOW_SIZE_MANUAL)
		goto skip;

	/* 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 (1)", __func__, loop->name);
			continue;
		}
		if (loop != c && skip_client(loop, type, current, s, w)) {
			log_debug("%s: skipping %s (1)", __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;
		}

		/*
		 * If the client has a per-window size, use this instead if it is
		 * smaller.
		 */
		if (w != NULL)
			cw = server_client_get_client_window(loop, w->id);
		else
			cw = NULL;

		/* Work out this client's size. */
		if (cw != NULL && cw->sx != 0 && cw->sy != 0) {
			cx = cw->sx;
			cy = cw->sy;
		} else {
			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);
	}
	if (*sx != UINT_MAX && *sy != UINT_MAX)
		log_debug("%s: calculated size %ux%u", __func__, *sx, *sy);
	else
		log_debug("%s: no calculated size", __func__);

skip:
	/*
	 * Do not allow any size to be larger than the per-client window size
	 * if one exists.
	 */
	if (w != NULL) {
		TAILQ_FOREACH(loop, &clients, entry) {
			if (loop != c && ignore_client_size(loop))
				continue;
			if (loop != c && skip_client(loop, type, current, s, w))
				continue;

			/* Look up per-window size if any. */
			if (~loop->flags & CLIENT_WINDOWSIZECHANGED)
				continue;
			cw = server_client_get_client_window(loop,