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/* $OpenBSD: resize.c,v 1.24 2017/08/28 12:36:38 nicm Exp $ */
/*
* 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"
/*
* Recalculate window and session sizes.
*
* Every session has the size of the smallest client it is attached to and
* every window the size of the smallest session it is attached to.
*
* So, when a client is resized or a session attached to or detached from a
* client, the window sizes must be recalculated. For each session, find the
* smallest client it is attached to, and resize it to that size. Then for
* every window, find the smallest session it is attached to, resize it to that
* size and clear and redraw every client with it as the current window.
*
* This is quite inefficient - better/additional data structures are needed
* to make it better.
*
* As a side effect, this function updates the SESSION_UNATTACHED flag. This
* flag is necessary to make sure unattached sessions do not limit the size of
* windows that are attached both to them and to other (attached) sessions.
*/
void
recalculate_sizes(void)
{
struct session *s;
struct client *c;
struct window *w;
struct window_pane *wp;
u_int ssx, ssy, has, limit;
int flag, has_status, is_zoomed, forced;
RB_FOREACH(s, sessions, &sessions) {
has_status = options_get_number(s->options, "status");
s->attached = 0;
ssx = ssy = UINT_MAX;
TAILQ_FOREACH(c, &clients, entry) {
if (c->flags & CLIENT_SUSPENDED)
continue;
if ((c->flags & (CLIENT_CONTROL|CLIENT_SIZECHANGED)) ==
CLIENT_CONTROL)
continue;
if (c->session == s) {
if (c->tty.sx < ssx)
ssx = c->tty.sx;
if (has_status &&
!(c->flags & CLIENT_CONTROL) &&
c->tty.sy > 1 && c->tty.sy - 1 < ssy)
ssy = c->tty.sy - 1;
else if (c->tty.sy < ssy)
ssy = c->tty.sy;
s->attached++;
}
}
if (ssx == UINT_MAX || ssy == UINT_MAX) {
s->flags |= SESSION_UNATTACHED;
continue;
}
s->flags &= ~SESSION_UNATTACHED;
if (has_status && ssy == 0)
ssy = 1;
if (s->sx == ssx && s->sy == ssy)
continue;
log_debug("session $%u size %u,%u (was %u,%u)", s->id, ssx, ssy,
s->sx, s->sy);
s->sx = ssx;
s->sy = ssy;
status_update_saved(s);
}
RB_FOREACH(w, windows, &windows) {
if (w->active == NULL)
continue;
flag = options_get_number(w->options, "aggressive-resize");
ssx = ssy = UINT_MAX;
RB_FOREACH(s, sessions, &sessions) {
if (s->flags & SESSION_UNATTACHED)
continue;
if (flag)
has = s->curw->window == w;
else
has = session_has(s, w);
if (has) {
if (s->sx < ssx)
ssx = s->sx;
if (s->sy < ssy)
ssy = s->sy;
}
}
if (ssx == UINT_MAX || ssy == UINT_MAX)
continue;
forced = 0;
limit = options_get_number(w->options, "force-width");
if (limit >= PANE_MINIMUM && ssx > limit) {
ssx = limit;
forced |= WINDOW_FORCEWIDTH;
}
limit = options_get_number(w->options, "force-height");
if (limit >= PANE_MINIMUM && ssy > limit) {
ssy = limit;
forced |= WINDOW_FORCEHEIGHT;
}
if (w->sx == ssx && w->sy == ssy)
continue;
log_debug("window @%u size %u,%u (was %u,%u)", w->id, ssx, ssy,
w->sx, w->sy);
w->flags &= ~(WINDOW_FORCEWIDTH|WINDOW_FORCEHEIGHT);
w->flags |= forced;
is_zoomed = w->flags & WINDOW_ZOOMED;
if (is_zoomed)
window_unzoom(w);
layout_resize(w, ssx, ssy);
window_resize(w, ssx, ssy);
if (is_zoomed && window_pane_visible(w->active))
window_zoom(w->active);
/*
* If the current pane is now not visible, move to the next
* that is.
*/
wp = w->active;
while (!window_pane_visible(w->active)) {
w->active = TAILQ_PREV(w->active, window_panes, entry);
if (w->active == NULL)
w->active = TAILQ_LAST(&w->panes, window_panes);
if (w->active == wp)
break;
}
if (w->active == w->last)
w->last = NULL;
server_redraw_window(w);
notify_window("window-layout-changed", w);
}
}
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