tmux/window.c
Nicholas Marriott 641191ab20 Support for windows larger than the client.
This adds two new options, window-size and default-size, and a new
command, resize-window.

The force-width and force-height options, and the session_width and
session_height formats have been removed.

The new window-size option tells tmux how to work out the size of
windows: largest means it picks the size of the largest session,
smallest the smallest session (similar to the old behaviour) and
manual means that it does not automatically resize
windows. aggressive-resize modifies the choice of session for largest
and smallest as it did before.

If a window is in a session attached to a client that is too small,
only part of the window is shown. tmux attempts to keep the cursor
visible, so the part of the window displayed is changed as the cursor
moves (with a small delay, to try and avoid excess redrawing when
applications redraw status lines or similar that are not currently
visible).

Drawing windows which are larger than the client is not as efficient
as those which fit, particularly when the cursor moves, so it is
recommended to avoid using this on slow machines or networks (set
window-size to smallest or manual).

The resize-window command can be used to resize a window manually. If
it is used, the window-size option is automatically set to manual for
the window (undo this with "setw -u window-size"). resize-window works
in a similar way to resize-pane (-U -D -L -R -x -y flags) but also has
-a and -A flags. -a sets the window to the size of the smallest client
(what it would be if window-size was smallest) and -A the largest.

For the same behaviour as force-width or force-height, use
resize-width -x or -y.

If the global window-size option is set to manual, the default-size
option is used for new windows. If -x or -y is used with new-session,
that sets the default-size option for the new session.

The maximum size of a window is 10000x10000. But expect applications
to complain and higher memory use if you make a window that big. The
minimum size is the size required for the current layout including
borders.

This change allows some code improvements, most notably that since
windows can now never be cropped, that code can be removed from the
layout code, and since panes can now never be outside the size of the
window, window_pane_visible can be removed.
2018-08-20 15:22:14 +01:00

1570 lines
33 KiB
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 <sys/ioctl.h>
#include <errno.h>
#include <fcntl.h>
#include <fnmatch.h>
#include <signal.h>
#include <stdint.h>
#include <stdlib.h>
#include <string.h>
#include <termios.h>
#include <time.h>
#include <unistd.h>
#include "tmux.h"
/*
* Each window is attached to a number of panes, each of which is a pty. This
* file contains code to handle them.
*
* A pane has two buffers attached, these are filled and emptied by the main
* server poll loop. Output data is received from pty's in screen format,
* translated and returned as a series of escape sequences and strings via
* input_parse (in input.c). Input data is received as key codes and written
* directly via input_key.
*
* Each pane also has a "virtual" screen (screen.c) which contains the current
* state and is redisplayed when the window is reattached to a client.
*
* Windows are stored directly on a global array and wrapped in any number of
* winlink structs to be linked onto local session RB trees. A reference count
* is maintained and a window removed from the global list and destroyed when
* it reaches zero.
*/
/* Global window list. */
struct windows windows;
/* Global panes tree. */
struct window_pane_tree all_window_panes;
static u_int next_window_pane_id;
static u_int next_window_id;
static u_int next_active_point;
static void window_destroy(struct window *);
static struct window_pane *window_pane_create(struct window *, u_int, u_int,
u_int);
static void window_pane_destroy(struct window_pane *);
static void window_pane_read_callback(struct bufferevent *, void *);
static void window_pane_error_callback(struct bufferevent *, short, void *);
static int winlink_next_index(struct winlinks *, int);
static struct window_pane *window_pane_choose_best(struct window_pane **,
u_int);
RB_GENERATE(windows, window, entry, window_cmp);
RB_GENERATE(winlinks, winlink, entry, winlink_cmp);
RB_GENERATE(window_pane_tree, window_pane, tree_entry, window_pane_cmp);
int
window_cmp(struct window *w1, struct window *w2)
{
return (w1->id - w2->id);
}
int
winlink_cmp(struct winlink *wl1, struct winlink *wl2)
{
return (wl1->idx - wl2->idx);
}
int
window_pane_cmp(struct window_pane *wp1, struct window_pane *wp2)
{
return (wp1->id - wp2->id);
}
struct winlink *
winlink_find_by_window(struct winlinks *wwl, struct window *w)
{
struct winlink *wl;
RB_FOREACH(wl, winlinks, wwl) {
if (wl->window == w)
return (wl);
}
return (NULL);
}
struct winlink *
winlink_find_by_index(struct winlinks *wwl, int idx)
{
struct winlink wl;
if (idx < 0)
fatalx("bad index");
wl.idx = idx;
return (RB_FIND(winlinks, wwl, &wl));
}
struct winlink *
winlink_find_by_window_id(struct winlinks *wwl, u_int id)
{
struct winlink *wl;
RB_FOREACH(wl, winlinks, wwl) {
if (wl->window->id == id)
return (wl);
}
return (NULL);
}
static int
winlink_next_index(struct winlinks *wwl, int idx)
{
int i;
i = idx;
do {
if (winlink_find_by_index(wwl, i) == NULL)
return (i);
if (i == INT_MAX)
i = 0;
else
i++;
} while (i != idx);
return (-1);
}
u_int
winlink_count(struct winlinks *wwl)
{
struct winlink *wl;
u_int n;
n = 0;
RB_FOREACH(wl, winlinks, wwl)
n++;
return (n);
}
struct winlink *
winlink_add(struct winlinks *wwl, int idx)
{
struct winlink *wl;
if (idx < 0) {
if ((idx = winlink_next_index(wwl, -idx - 1)) == -1)
return (NULL);
} else if (winlink_find_by_index(wwl, idx) != NULL)
return (NULL);
wl = xcalloc(1, sizeof *wl);
wl->idx = idx;
RB_INSERT(winlinks, wwl, wl);
return (wl);
}
void
winlink_set_window(struct winlink *wl, struct window *w)
{
if (wl->window != NULL) {
TAILQ_REMOVE(&wl->window->winlinks, wl, wentry);
window_remove_ref(wl->window, __func__);
}
TAILQ_INSERT_TAIL(&w->winlinks, wl, wentry);
wl->window = w;
window_add_ref(w, __func__);
}
void
winlink_remove(struct winlinks *wwl, struct winlink *wl)
{
struct window *w = wl->window;
if (w != NULL) {
TAILQ_REMOVE(&w->winlinks, wl, wentry);
window_remove_ref(w, __func__);
}
RB_REMOVE(winlinks, wwl, wl);
free(wl->status_text);
free(wl);
}
struct winlink *
winlink_next(struct winlink *wl)
{
return (RB_NEXT(winlinks, wwl, wl));
}
struct winlink *
winlink_previous(struct winlink *wl)
{
return (RB_PREV(winlinks, wwl, wl));
}
struct winlink *
winlink_next_by_number(struct winlink *wl, struct session *s, int n)
{
for (; n > 0; n--) {
if ((wl = RB_NEXT(winlinks, wwl, wl)) == NULL)
wl = RB_MIN(winlinks, &s->windows);
}
return (wl);
}
struct winlink *
winlink_previous_by_number(struct winlink *wl, struct session *s, int n)
{
for (; n > 0; n--) {
if ((wl = RB_PREV(winlinks, wwl, wl)) == NULL)
wl = RB_MAX(winlinks, &s->windows);
}
return (wl);
}
void
winlink_stack_push(struct winlink_stack *stack, struct winlink *wl)
{
if (wl == NULL)
return;
winlink_stack_remove(stack, wl);
TAILQ_INSERT_HEAD(stack, wl, sentry);
}
void
winlink_stack_remove(struct winlink_stack *stack, struct winlink *wl)
{
struct winlink *wl2;
if (wl == NULL)
return;
TAILQ_FOREACH(wl2, stack, sentry) {
if (wl2 == wl) {
TAILQ_REMOVE(stack, wl, sentry);
return;
}
}
}
struct window *
window_find_by_id_str(const char *s)
{
const char *errstr;
u_int id;
if (*s != '@')
return (NULL);
id = strtonum(s + 1, 0, UINT_MAX, &errstr);
if (errstr != NULL)
return (NULL);
return (window_find_by_id(id));
}
struct window *
window_find_by_id(u_int id)
{
struct window w;
w.id = id;
return (RB_FIND(windows, &windows, &w));
}
void
window_update_activity(struct window *w)
{
gettimeofday(&w->activity_time, NULL);
alerts_queue(w, WINDOW_ACTIVITY);
}
struct window *
window_create(u_int sx, u_int sy)
{
struct window *w;
w = xcalloc(1, sizeof *w);
w->name = NULL;
w->flags = WINDOW_STYLECHANGED;
TAILQ_INIT(&w->panes);
w->active = NULL;
w->lastlayout = -1;
w->layout_root = NULL;
w->sx = sx;
w->sy = sy;
w->options = options_create(global_w_options);
w->references = 0;
TAILQ_INIT(&w->winlinks);
w->id = next_window_id++;
RB_INSERT(windows, &windows, w);
window_update_activity(w);
return (w);
}
struct window *
window_create_spawn(const char *name, int argc, char **argv, const char *path,
const char *shell, const char *cwd, struct environ *env,
struct termios *tio, u_int sx, u_int sy, u_int hlimit, char **cause)
{
struct window *w;
struct window_pane *wp;
w = window_create(sx, sy);
wp = window_add_pane(w, NULL, 0, 0, hlimit);
layout_init(w, wp);
if (window_pane_spawn(wp, argc, argv, path, shell, cwd,
env, tio, cause) != 0) {
window_destroy(w);
return (NULL);
}
w->active = TAILQ_FIRST(&w->panes);
if (name != NULL) {
w->name = xstrdup(name);
options_set_number(w->options, "automatic-rename", 0);
} else
w->name = default_window_name(w);
notify_window("window-pane-changed", w);
return (w);
}
static void
window_destroy(struct window *w)
{
log_debug("window @%u destroyed (%d references)", w->id, w->references);
RB_REMOVE(windows, &windows, w);
if (w->layout_root != NULL)
layout_free_cell(w->layout_root);
if (w->saved_layout_root != NULL)
layout_free_cell(w->saved_layout_root);
free(w->old_layout);
if (event_initialized(&w->name_event))
evtimer_del(&w->name_event);
if (event_initialized(&w->alerts_timer))
evtimer_del(&w->alerts_timer);
if (event_initialized(&w->offset_timer))
event_del(&w->offset_timer);
options_free(w->options);
window_destroy_panes(w);
free(w->name);
free(w);
}
int
window_pane_destroy_ready(struct window_pane *wp)
{
int n;
if (wp->pipe_fd != -1) {
if (EVBUFFER_LENGTH(wp->pipe_event->output) != 0)
return (0);
if (ioctl(wp->fd, FIONREAD, &n) != -1 && n > 0)
return (0);
}
if (~wp->flags & PANE_EXITED)
return (0);
return (1);
}
void
window_add_ref(struct window *w, const char *from)
{
w->references++;
log_debug("%s: @%u %s, now %d", __func__, w->id, from, w->references);
}
void
window_remove_ref(struct window *w, const char *from)
{
w->references--;
log_debug("%s: @%u %s, now %d", __func__, w->id, from, w->references);
if (w->references == 0)
window_destroy(w);
}
void
window_set_name(struct window *w, const char *new_name)
{
free(w->name);
utf8_stravis(&w->name, new_name, VIS_OCTAL|VIS_CSTYLE|VIS_TAB|VIS_NL);
notify_window("window-renamed", w);
}
void
window_resize(struct window *w, u_int sx, u_int sy)
{
w->sx = sx;
w->sy = sy;
}
int
window_has_pane(struct window *w, struct window_pane *wp)
{
struct window_pane *wp1;
TAILQ_FOREACH(wp1, &w->panes, entry) {
if (wp1 == wp)
return (1);
}
return (0);
}
int
window_set_active_pane(struct window *w, struct window_pane *wp)
{
log_debug("%s: pane %%%u (was %%%u)", __func__, wp->id, w->active->id);
if (wp == w->active)
return (0);
w->last = w->active;
w->active = wp;
w->active->active_point = next_active_point++;
w->active->flags |= PANE_CHANGED;
tty_update_window_offset(w);
notify_window("window-pane-changed", w);
return (1);
}
void
window_redraw_active_switch(struct window *w, struct window_pane *wp)
{
const struct grid_cell *gc;
if (wp == w->active)
return;
/*
* If window-style and window-active-style are the same, we don't need
* to redraw panes when switching active panes.
*/
gc = options_get_style(w->options, "window-active-style");
if (style_equal(gc, options_get_style(w->options, "window-style")))
return;
/*
* If the now active or inactive pane do not have a custom style or if
* the palette is different, they need to be redrawn.
*/
if (window_pane_get_palette(w->active, w->active->colgc.fg) != -1 ||
window_pane_get_palette(w->active, w->active->colgc.bg) != -1 ||
style_equal(&grid_default_cell, &w->active->colgc))
w->active->flags |= PANE_REDRAW;
if (window_pane_get_palette(wp, wp->colgc.fg) != -1 ||
window_pane_get_palette(wp, wp->colgc.bg) != -1 ||
style_equal(&grid_default_cell, &wp->colgc))
wp->flags |= PANE_REDRAW;
}
struct window_pane *
window_get_active_at(struct window *w, u_int x, u_int y)
{
struct window_pane *wp;
TAILQ_FOREACH(wp, &w->panes, entry) {
if (x < wp->xoff || x > wp->xoff + wp->sx)
continue;
if (y < wp->yoff || y > wp->yoff + wp->sy)
continue;
return (wp);
}
return (NULL);
}
struct window_pane *
window_find_string(struct window *w, const char *s)
{
u_int x, y;
x = w->sx / 2;
y = w->sy / 2;
if (strcasecmp(s, "top") == 0)
y = 0;
else if (strcasecmp(s, "bottom") == 0)
y = w->sy - 1;
else if (strcasecmp(s, "left") == 0)
x = 0;
else if (strcasecmp(s, "right") == 0)
x = w->sx - 1;
else if (strcasecmp(s, "top-left") == 0) {
x = 0;
y = 0;
} else if (strcasecmp(s, "top-right") == 0) {
x = w->sx - 1;
y = 0;
} else if (strcasecmp(s, "bottom-left") == 0) {
x = 0;
y = w->sy - 1;
} else if (strcasecmp(s, "bottom-right") == 0) {
x = w->sx - 1;
y = w->sy - 1;
} else
return (NULL);
return (window_get_active_at(w, x, y));
}
int
window_zoom(struct window_pane *wp)
{
struct window *w = wp->window;
struct window_pane *wp1;
if (w->flags & WINDOW_ZOOMED)
return (-1);
if (window_count_panes(w) == 1)
return (-1);
if (w->active != wp)
window_set_active_pane(w, wp);
TAILQ_FOREACH(wp1, &w->panes, entry) {
wp1->saved_layout_cell = wp1->layout_cell;
wp1->layout_cell = NULL;
}
w->saved_layout_root = w->layout_root;
layout_init(w, wp);
w->flags |= WINDOW_ZOOMED;
notify_window("window-layout-changed", w);
return (0);
}
int
window_unzoom(struct window *w)
{
struct window_pane *wp;
if (!(w->flags & WINDOW_ZOOMED))
return (-1);
w->flags &= ~WINDOW_ZOOMED;
layout_free(w);
w->layout_root = w->saved_layout_root;
w->saved_layout_root = NULL;
TAILQ_FOREACH(wp, &w->panes, entry) {
wp->layout_cell = wp->saved_layout_cell;
wp->saved_layout_cell = NULL;
}
layout_fix_panes(w);
notify_window("window-layout-changed", w);
return (0);
}
struct window_pane *
window_add_pane(struct window *w, struct window_pane *other, int before,
int full_size, u_int hlimit)
{
struct window_pane *wp;
if (other == NULL)
other = w->active;
wp = window_pane_create(w, w->sx, w->sy, hlimit);
if (TAILQ_EMPTY(&w->panes)) {
log_debug("%s: @%u at start", __func__, w->id);
TAILQ_INSERT_HEAD(&w->panes, wp, entry);
} else if (before) {
log_debug("%s: @%u before %%%u", __func__, w->id, wp->id);
if (full_size)
TAILQ_INSERT_HEAD(&w->panes, wp, entry);
else
TAILQ_INSERT_BEFORE(other, wp, entry);
} else {
log_debug("%s: @%u after %%%u", __func__, w->id, wp->id);
if (full_size)
TAILQ_INSERT_TAIL(&w->panes, wp, entry);
else
TAILQ_INSERT_AFTER(&w->panes, other, wp, entry);
}
return (wp);
}
void
window_lost_pane(struct window *w, struct window_pane *wp)
{
log_debug("%s: @%u pane %%%u", __func__, w->id, wp->id);
if (wp == marked_pane.wp)
server_clear_marked();
if (wp == w->active) {
w->active = w->last;
w->last = NULL;
if (w->active == NULL) {
w->active = TAILQ_PREV(wp, window_panes, entry);
if (w->active == NULL)
w->active = TAILQ_NEXT(wp, entry);
}
if (w->active != NULL) {
w->active->flags |= PANE_CHANGED;
notify_window("window-pane-changed", w);
}
} else if (wp == w->last)
w->last = NULL;
}
void
window_remove_pane(struct window *w, struct window_pane *wp)
{
window_lost_pane(w, wp);
TAILQ_REMOVE(&w->panes, wp, entry);
window_pane_destroy(wp);
}
struct window_pane *
window_pane_at_index(struct window *w, u_int idx)
{
struct window_pane *wp;
u_int n;
n = options_get_number(w->options, "pane-base-index");
TAILQ_FOREACH(wp, &w->panes, entry) {
if (n == idx)
return (wp);
n++;
}
return (NULL);
}
struct window_pane *
window_pane_next_by_number(struct window *w, struct window_pane *wp, u_int n)
{
for (; n > 0; n--) {
if ((wp = TAILQ_NEXT(wp, entry)) == NULL)
wp = TAILQ_FIRST(&w->panes);
}
return (wp);
}
struct window_pane *
window_pane_previous_by_number(struct window *w, struct window_pane *wp,
u_int n)
{
for (; n > 0; n--) {
if ((wp = TAILQ_PREV(wp, window_panes, entry)) == NULL)
wp = TAILQ_LAST(&w->panes, window_panes);
}
return (wp);
}
int
window_pane_index(struct window_pane *wp, u_int *i)
{
struct window_pane *wq;
struct window *w = wp->window;
*i = options_get_number(w->options, "pane-base-index");
TAILQ_FOREACH(wq, &w->panes, entry) {
if (wp == wq) {
return (0);
}
(*i)++;
}
return (-1);
}
u_int
window_count_panes(struct window *w)
{
struct window_pane *wp;
u_int n;
n = 0;
TAILQ_FOREACH(wp, &w->panes, entry)
n++;
return (n);
}
void
window_destroy_panes(struct window *w)
{
struct window_pane *wp;
while (!TAILQ_EMPTY(&w->panes)) {
wp = TAILQ_FIRST(&w->panes);
TAILQ_REMOVE(&w->panes, wp, entry);
window_pane_destroy(wp);
}
}
const char *
window_printable_flags(struct winlink *wl)
{
struct session *s = wl->session;
static char flags[32];
int pos;
pos = 0;
if (wl->flags & WINLINK_ACTIVITY)
flags[pos++] = '#';
if (wl->flags & WINLINK_BELL)
flags[pos++] = '!';
if (wl->flags & WINLINK_SILENCE)
flags[pos++] = '~';
if (wl == s->curw)
flags[pos++] = '*';
if (wl == TAILQ_FIRST(&s->lastw))
flags[pos++] = '-';
if (server_check_marked() && wl == marked_pane.wl)
flags[pos++] = 'M';
if (wl->window->flags & WINDOW_ZOOMED)
flags[pos++] = 'Z';
flags[pos] = '\0';
return (flags);
}
struct window_pane *
window_pane_find_by_id_str(const char *s)
{
const char *errstr;
u_int id;
if (*s != '%')
return (NULL);
id = strtonum(s + 1, 0, UINT_MAX, &errstr);
if (errstr != NULL)
return (NULL);
return (window_pane_find_by_id(id));
}
struct window_pane *
window_pane_find_by_id(u_int id)
{
struct window_pane wp;
wp.id = id;
return (RB_FIND(window_pane_tree, &all_window_panes, &wp));
}
static struct window_pane *
window_pane_create(struct window *w, u_int sx, u_int sy, u_int hlimit)
{
struct window_pane *wp;
char host[HOST_NAME_MAX + 1];
wp = xcalloc(1, sizeof *wp);
wp->window = w;
wp->id = next_window_pane_id++;
RB_INSERT(window_pane_tree, &all_window_panes, wp);
wp->argc = 0;
wp->argv = NULL;
wp->shell = NULL;
wp->cwd = NULL;
wp->fd = -1;
wp->event = NULL;
wp->mode = NULL;
wp->modeprefix = 1;
wp->layout_cell = NULL;
wp->xoff = 0;
wp->yoff = 0;
wp->sx = wp->osx = sx;
wp->sy = wp->osx = sy;
wp->pipe_fd = -1;
wp->pipe_off = 0;
wp->pipe_event = NULL;
wp->saved_grid = NULL;
memcpy(&wp->colgc, &grid_default_cell, sizeof wp->colgc);
screen_init(&wp->base, sx, sy, hlimit);
wp->screen = &wp->base;
screen_init(&wp->status_screen, 1, 1, 0);
if (gethostname(host, sizeof host) == 0)
screen_set_title(&wp->base, host);
input_init(wp);
return (wp);
}
static void
window_pane_destroy(struct window_pane *wp)
{
window_pane_reset_mode(wp);
free(wp->searchstr);
if (wp->fd != -1) {
#ifdef HAVE_UTEMPTER
utempter_remove_record(wp->fd);
#endif
bufferevent_free(wp->event);
close(wp->fd);
}
input_free(wp);
screen_free(&wp->base);
if (wp->saved_grid != NULL)
grid_destroy(wp->saved_grid);
if (wp->pipe_fd != -1) {
bufferevent_free(wp->pipe_event);
close(wp->pipe_fd);
}
if (event_initialized(&wp->resize_timer))
event_del(&wp->resize_timer);
RB_REMOVE(window_pane_tree, &all_window_panes, wp);
free((void *)wp->cwd);
free(wp->shell);
cmd_free_argv(wp->argc, wp->argv);
free(wp->palette);
free(wp);
}
int
window_pane_spawn(struct window_pane *wp, int argc, char **argv,
const char *path, const char *shell, const char *cwd, struct environ *env,
struct termios *tio, char **cause)
{
struct winsize ws;
char *argv0, *cmd, **argvp;
const char *ptr, *first, *home;
struct termios tio2;
#ifdef HAVE_UTEMPTER
char s[32];
#endif
sigset_t set, oldset;
if (wp->fd != -1) {
bufferevent_free(wp->event);
close(wp->fd);
}
if (argc > 0) {
cmd_free_argv(wp->argc, wp->argv);
wp->argc = argc;
wp->argv = cmd_copy_argv(argc, argv);
}
if (shell != NULL) {
free(wp->shell);
wp->shell = xstrdup(shell);
}
if (cwd != NULL) {
free((void *)wp->cwd);
wp->cwd = xstrdup(cwd);
}
wp->flags &= ~(PANE_STATUSREADY|PANE_STATUSDRAWN);
cmd = cmd_stringify_argv(wp->argc, wp->argv);
log_debug("%s: shell=%s", __func__, wp->shell);
log_debug("%s: cmd=%s", __func__, cmd);
log_debug("%s: cwd=%s", __func__, cwd);
cmd_log_argv(wp->argc, wp->argv, __func__);
environ_log(env, "%s: environment ", __func__);
memset(&ws, 0, sizeof ws);
ws.ws_col = screen_size_x(&wp->base);
ws.ws_row = screen_size_y(&wp->base);
sigfillset(&set);
sigprocmask(SIG_BLOCK, &set, &oldset);
switch (wp->pid = fdforkpty(ptm_fd, &wp->fd, wp->tty, NULL, &ws)) {
case -1:
wp->fd = -1;
xasprintf(cause, "%s: %s", cmd, strerror(errno));
free(cmd);
sigprocmask(SIG_SETMASK, &oldset, NULL);
return (-1);
case 0:
proc_clear_signals(server_proc, 1);
sigprocmask(SIG_SETMASK, &oldset, NULL);
cwd = NULL;
if (chdir(wp->cwd) == 0)
cwd = wp->cwd;
else if ((home = find_home()) != NULL && chdir(home) == 0)
cwd = home;
else
chdir("/");
if (tcgetattr(STDIN_FILENO, &tio2) != 0)
fatal("tcgetattr failed");
if (tio != NULL)
memcpy(tio2.c_cc, tio->c_cc, sizeof tio2.c_cc);
tio2.c_cc[VERASE] = '\177';
#ifdef IUTF8
tio2.c_iflag |= IUTF8;
#endif
if (tcsetattr(STDIN_FILENO, TCSANOW, &tio2) != 0)
fatal("tcgetattr failed");
log_close();
closefrom(STDERR_FILENO + 1);
if (path != NULL)
environ_set(env, "PATH", "%s", path);
if (cwd != NULL)
environ_set(env, "PWD", "%s", cwd);
environ_set(env, "TMUX_PANE", "%%%u", wp->id);
environ_push(env);
setenv("SHELL", wp->shell, 1);
ptr = strrchr(wp->shell, '/');
/*
* If given one argument, assume it should be passed to sh -c;
* with more than one argument, use execvp(). If there is no
* arguments, create a login shell.
*/
if (wp->argc > 0) {
if (wp->argc != 1) {
/* Copy to ensure argv ends in NULL. */
argvp = cmd_copy_argv(wp->argc, wp->argv);
execvp(argvp[0], argvp);
fatal("execvp failed");
}
first = wp->argv[0];
if (ptr != NULL && *(ptr + 1) != '\0')
xasprintf(&argv0, "%s", ptr + 1);
else
xasprintf(&argv0, "%s", wp->shell);
execl(wp->shell, argv0, "-c", first, (char *)NULL);
fatal("execl failed");
}
if (ptr != NULL && *(ptr + 1) != '\0')
xasprintf(&argv0, "-%s", ptr + 1);
else
xasprintf(&argv0, "-%s", wp->shell);
execl(wp->shell, argv0, (char *)NULL);
fatal("execl failed");
}
log_debug("%s: master=%s", __func__, ttyname(wp->fd));
log_debug("%s: slave=%s", __func__, wp->tty);
#ifdef HAVE_UTEMPTER
xsnprintf(s, sizeof s, "tmux(%lu).%%%u", (long) getpid(), wp->id);
utempter_add_record(wp->fd, s);
kill(getpid(), SIGCHLD);
#endif
sigprocmask(SIG_SETMASK, &oldset, NULL);
setblocking(wp->fd, 0);
wp->event = bufferevent_new(wp->fd, window_pane_read_callback, NULL,
window_pane_error_callback, wp);
bufferevent_setwatermark(wp->event, EV_READ, 0, READ_SIZE);
bufferevent_enable(wp->event, EV_READ|EV_WRITE);
free(cmd);
return (0);
}
static void
window_pane_read_callback(__unused struct bufferevent *bufev, void *data)
{
struct window_pane *wp = data;
struct evbuffer *evb = wp->event->input;
size_t size = EVBUFFER_LENGTH(evb);
char *new_data;
size_t new_size;
new_size = size - wp->pipe_off;
if (wp->pipe_fd != -1 && new_size > 0) {
new_data = EVBUFFER_DATA(evb) + wp->pipe_off;
bufferevent_write(wp->pipe_event, new_data, new_size);
}
log_debug("%%%u has %zu bytes", wp->id, size);
input_parse(wp);
wp->pipe_off = EVBUFFER_LENGTH(evb);
}
static void
window_pane_error_callback(__unused struct bufferevent *bufev,
__unused short what, void *data)
{
struct window_pane *wp = data;
log_debug("%%%u error", wp->id);
wp->flags |= PANE_EXITED;
if (window_pane_destroy_ready(wp))
server_destroy_pane(wp, 1);
}
void
window_pane_resize(struct window_pane *wp, u_int sx, u_int sy)
{
if (sx == wp->sx && sy == wp->sy)
return;
wp->sx = sx;
wp->sy = sy;
screen_resize(&wp->base, sx, sy, wp->saved_grid == NULL);
if (wp->mode != NULL)
wp->mode->resize(wp, sx, sy);
wp->flags |= PANE_RESIZE;
}
/*
* Enter alternative screen mode. A copy of the visible screen is saved and the
* history is not updated
*/
void
window_pane_alternate_on(struct window_pane *wp, struct grid_cell *gc,
int cursor)
{
struct screen *s = &wp->base;
u_int sx, sy;
if (wp->saved_grid != NULL)
return;
if (!options_get_number(wp->window->options, "alternate-screen"))
return;
sx = screen_size_x(s);
sy = screen_size_y(s);
wp->saved_grid = grid_create(sx, sy, 0);
grid_duplicate_lines(wp->saved_grid, 0, s->grid, screen_hsize(s), sy);
if (cursor) {
wp->saved_cx = s->cx;
wp->saved_cy = s->cy;
}
memcpy(&wp->saved_cell, gc, sizeof wp->saved_cell);
grid_view_clear(s->grid, 0, 0, sx, sy, 8);
wp->base.grid->flags &= ~GRID_HISTORY;
wp->flags |= PANE_REDRAW;
}
/* Exit alternate screen mode and restore the copied grid. */
void
window_pane_alternate_off(struct window_pane *wp, struct grid_cell *gc,
int cursor)
{
struct screen *s = &wp->base;
u_int sx, sy;
if (wp->saved_grid == NULL)
return;
if (!options_get_number(wp->window->options, "alternate-screen"))
return;
sx = screen_size_x(s);
sy = screen_size_y(s);
/*
* If the current size is bigger, temporarily resize to the old size
* before copying back.
*/
if (sy > wp->saved_grid->sy)
screen_resize(s, sx, wp->saved_grid->sy, 1);
/* Restore the grid, cursor position and cell. */
grid_duplicate_lines(s->grid, screen_hsize(s), wp->saved_grid, 0, sy);
if (cursor)
s->cx = wp->saved_cx;
if (s->cx > screen_size_x(s) - 1)
s->cx = screen_size_x(s) - 1;
if (cursor)
s->cy = wp->saved_cy;
if (s->cy > screen_size_y(s) - 1)
s->cy = screen_size_y(s) - 1;
memcpy(gc, &wp->saved_cell, sizeof *gc);
/*
* Turn history back on (so resize can use it) and then resize back to
* the current size.
*/
wp->base.grid->flags |= GRID_HISTORY;
if (sy > wp->saved_grid->sy || sx != wp->saved_grid->sx)
screen_resize(s, sx, sy, 1);
grid_destroy(wp->saved_grid);
wp->saved_grid = NULL;
wp->flags |= PANE_REDRAW;
}
void
window_pane_set_palette(struct window_pane *wp, u_int n, int colour)
{
if (n > 0xff)
return;
if (wp->palette == NULL)
wp->palette = xcalloc(0x100, sizeof *wp->palette);
wp->palette[n] = colour;
wp->flags |= PANE_REDRAW;
}
void
window_pane_unset_palette(struct window_pane *wp, u_int n)
{
if (n > 0xff || wp->palette == NULL)
return;
wp->palette[n] = 0;
wp->flags |= PANE_REDRAW;
}
void
window_pane_reset_palette(struct window_pane *wp)
{
if (wp->palette == NULL)
return;
free(wp->palette);
wp->palette = NULL;
wp->flags |= PANE_REDRAW;
}
int
window_pane_get_palette(const struct window_pane *wp, int c)
{
int new;
if (wp == NULL || wp->palette == NULL)
return (-1);
new = -1;
if (c < 8)
new = wp->palette[c];
else if (c >= 90 && c <= 97)
new = wp->palette[8 + c - 90];
else if (c & COLOUR_FLAG_256)
new = wp->palette[c & ~COLOUR_FLAG_256];
if (new == 0)
return (-1);
return (new);
}
static void
window_pane_mode_timer(__unused int fd, __unused short events, void *arg)
{
struct window_pane *wp = arg;
struct timeval tv = { .tv_sec = 10 };
int n = 0;
evtimer_del(&wp->modetimer);
evtimer_add(&wp->modetimer, &tv);
log_debug("%%%u in mode: last=%ld", wp->id, (long)wp->modelast);
if (wp->modelast < time(NULL) - WINDOW_MODE_TIMEOUT) {
if (ioctl(wp->fd, FIONREAD, &n) == -1 || n > 0)
window_pane_reset_mode(wp);
}
}
int
window_pane_set_mode(struct window_pane *wp, const struct window_mode *mode,
struct cmd_find_state *fs, struct args *args)
{
struct screen *s;
struct timeval tv = { .tv_sec = 10 };
if (wp->mode != NULL)
return (1);
wp->mode = mode;
wp->modelast = time(NULL);
evtimer_set(&wp->modetimer, window_pane_mode_timer, wp);
evtimer_add(&wp->modetimer, &tv);
if ((s = wp->mode->init(wp, fs, args)) != NULL)
wp->screen = s;
wp->flags |= (PANE_REDRAW|PANE_CHANGED);
server_status_window(wp->window);
notify_pane("pane-mode-changed", wp);
return (0);
}
void
window_pane_reset_mode(struct window_pane *wp)
{
if (wp->mode == NULL)
return;
evtimer_del(&wp->modetimer);
wp->mode->free(wp);
wp->mode = NULL;
wp->modeprefix = 1;
wp->screen = &wp->base;
wp->flags |= (PANE_REDRAW|PANE_CHANGED);
server_status_window(wp->window);
notify_pane("pane-mode-changed", wp);
}
void
window_pane_key(struct window_pane *wp, struct client *c, struct session *s,
key_code key, struct mouse_event *m)
{
struct window_pane *wp2;
if (KEYC_IS_MOUSE(key) && m == NULL)
return;
if (wp->mode != NULL) {
wp->modelast = time(NULL);
if (wp->mode->key != NULL)
wp->mode->key(wp, c, s, (key & ~KEYC_XTERM), m);
return;
}
if (wp->fd == -1 || wp->flags & PANE_INPUTOFF)
return;
input_key(wp, key, m);
if (KEYC_IS_MOUSE(key))
return;
if (options_get_number(wp->window->options, "synchronize-panes")) {
TAILQ_FOREACH(wp2, &wp->window->panes, entry) {
if (wp2 == wp || wp2->mode != NULL)
continue;
if (wp2->fd == -1 || wp2->flags & PANE_INPUTOFF)
continue;
input_key(wp2, key, NULL);
}
}
}
u_int
window_pane_search(struct window_pane *wp, const char *searchstr)
{
struct screen *s = &wp->base;
char *newsearchstr, *line;
u_int i;
xasprintf(&newsearchstr, "*%s*", searchstr);
for (i = 0; i < screen_size_y(s); i++) {
line = grid_view_string_cells(s->grid, 0, i, screen_size_x(s));
if (fnmatch(newsearchstr, line, 0) == 0) {
free(line);
break;
}
free(line);
}
free(newsearchstr);
if (i == screen_size_y(s))
return (0);
return (i + 1);
}
/* Get MRU pane from a list. */
static struct window_pane *
window_pane_choose_best(struct window_pane **list, u_int size)
{
struct window_pane *next, *best;
u_int i;
if (size == 0)
return (NULL);
best = list[0];
for (i = 1; i < size; i++) {
next = list[i];
if (next->active_point > best->active_point)
best = next;
}
return (best);
}
/*
* Find the pane directly above another. We build a list of those adjacent to
* top edge and then choose the best.
*/
struct window_pane *
window_pane_find_up(struct window_pane *wp)
{
struct window_pane *next, *best, **list;
u_int edge, left, right, end, size;
int status, found;
if (wp == NULL)
return (NULL);
status = options_get_number(wp->window->options, "pane-border-status");
list = NULL;
size = 0;
edge = wp->yoff;
if (edge == (status == 1 ? 1 : 0))
edge = wp->window->sy + 1 - (status == 2 ? 1 : 0);
left = wp->xoff;
right = wp->xoff + wp->sx;
TAILQ_FOREACH(next, &wp->window->panes, entry) {
if (next == wp)
continue;
if (next->yoff + next->sy + 1 != edge)
continue;
end = next->xoff + next->sx - 1;
found = 0;
if (next->xoff < left && end > right)
found = 1;
else if (next->xoff >= left && next->xoff <= right)
found = 1;
else if (end >= left && end <= right)
found = 1;
if (!found)
continue;
list = xreallocarray(list, size + 1, sizeof *list);
list[size++] = next;
}
best = window_pane_choose_best(list, size);
free(list);
return (best);
}
/* Find the pane directly below another. */
struct window_pane *
window_pane_find_down(struct window_pane *wp)
{
struct window_pane *next, *best, **list;
u_int edge, left, right, end, size;
int status, found;
if (wp == NULL)
return (NULL);
status = options_get_number(wp->window->options, "pane-border-status");
list = NULL;
size = 0;
edge = wp->yoff + wp->sy + 1;
if (edge >= wp->window->sy - (status == 2 ? 1 : 0))
edge = (status == 1 ? 1 : 0);
left = wp->xoff;
right = wp->xoff + wp->sx;
TAILQ_FOREACH(next, &wp->window->panes, entry) {
if (next == wp)
continue;
if (next->yoff != edge)
continue;
end = next->xoff + next->sx - 1;
found = 0;
if (next->xoff < left && end > right)
found = 1;
else if (next->xoff >= left && next->xoff <= right)
found = 1;
else if (end >= left && end <= right)
found = 1;
if (!found)
continue;
list = xreallocarray(list, size + 1, sizeof *list);
list[size++] = next;
}
best = window_pane_choose_best(list, size);
free(list);
return (best);
}
/* Find the pane directly to the left of another. */
struct window_pane *
window_pane_find_left(struct window_pane *wp)
{
struct window_pane *next, *best, **list;
u_int edge, top, bottom, end, size;
int found;
if (wp == NULL)
return (NULL);
list = NULL;
size = 0;
edge = wp->xoff;
if (edge == 0)
edge = wp->window->sx + 1;
top = wp->yoff;
bottom = wp->yoff + wp->sy;
TAILQ_FOREACH(next, &wp->window->panes, entry) {
if (next == wp)
continue;
if (next->xoff + next->sx + 1 != edge)
continue;
end = next->yoff + next->sy - 1;
found = 0;
if (next->yoff < top && end > bottom)
found = 1;
else if (next->yoff >= top && next->yoff <= bottom)
found = 1;
else if (end >= top && end <= bottom)
found = 1;
if (!found)
continue;
list = xreallocarray(list, size + 1, sizeof *list);
list[size++] = next;
}
best = window_pane_choose_best(list, size);
free(list);
return (best);
}
/* Find the pane directly to the right of another. */
struct window_pane *
window_pane_find_right(struct window_pane *wp)
{
struct window_pane *next, *best, **list;
u_int edge, top, bottom, end, size;
int found;
if (wp == NULL)
return (NULL);
list = NULL;
size = 0;
edge = wp->xoff + wp->sx + 1;
if (edge >= wp->window->sx)
edge = 0;
top = wp->yoff;
bottom = wp->yoff + wp->sy;
TAILQ_FOREACH(next, &wp->window->panes, entry) {
if (next == wp)
continue;
if (next->xoff != edge)
continue;
end = next->yoff + next->sy - 1;
found = 0;
if (next->yoff < top && end > bottom)
found = 1;
else if (next->yoff >= top && next->yoff <= bottom)
found = 1;
else if (end >= top && end <= bottom)
found = 1;
if (!found)
continue;
list = xreallocarray(list, size + 1, sizeof *list);
list[size++] = next;
}
best = window_pane_choose_best(list, size);
free(list);
return (best);
}
/* Clear alert flags for a winlink */
void
winlink_clear_flags(struct winlink *wl)
{
struct winlink *loop;
wl->window->flags &= ~WINDOW_ALERTFLAGS;
TAILQ_FOREACH(loop, &wl->window->winlinks, wentry) {
if ((loop->flags & WINLINK_ALERTFLAGS) != 0) {
loop->flags &= ~WINLINK_ALERTFLAGS;
server_status_session(loop->session);
}
}
}
/* Shuffle window indexes up. */
int
winlink_shuffle_up(struct session *s, struct winlink *wl)
{
int idx, last;
idx = wl->idx + 1;
/* Find the next free index. */
for (last = idx; last < INT_MAX; last++) {
if (winlink_find_by_index(&s->windows, last) == NULL)
break;
}
if (last == INT_MAX)
return (-1);
/* Move everything from last - 1 to idx up a bit. */
for (; last > idx; last--) {
wl = winlink_find_by_index(&s->windows, last - 1);
server_link_window(s, wl, s, last, 0, 0, NULL);
server_unlink_window(s, wl);
}
return (idx);
}