tmux/window.c

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/* $OpenBSD$ */
/*
* 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 <util.h>
#include <vis.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);
}
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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 *
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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;
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w->options = options_create(global_w_options);
w->references = 0;
TAILQ_INIT(&w->winlinks);
w->id = next_window_id++;
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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, 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);
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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);
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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;
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) {
notify_window("window-pane-changed", w);
return (1);
}
}
w->active->active_point = next_active_point++;
w->active->flags |= PANE_CHANGED;
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 (!window_pane_visible(wp))
continue;
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_pane_visible(wp))
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, w->sx, w->sy);
notify_window("window-layout-changed", w);
return (0);
}
struct window_pane *
window_add_pane(struct window *w, struct window_pane *other, int before,
u_int hlimit)
{
struct window_pane *wp;
if (other == NULL)
other = w->active;
wp = window_pane_create(w, w->sx, w->sy, hlimit);
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if (TAILQ_EMPTY(&w->panes)) {
log_debug("%s: @%u at start", __func__, w->id);
TAILQ_INSERT_HEAD(&w->panes, wp, entry);
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} else if (before) {
log_debug("%s: @%u before %%%u", __func__, w->id, wp->id);
TAILQ_INSERT_BEFORE(other, wp, entry);
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} else {
log_debug("%s: @%u after %%%u", __func__, w->id, wp->id);
TAILQ_INSERT_AFTER(&w->panes, other, wp, entry);
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}
return (wp);
}
void
window_lost_pane(struct window *w, struct window_pane *wp)
{
log_debug("%s: @%u pane %%%u", __func__, w->id, wp->id);
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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;
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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;
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*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++] = '-';
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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) {
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;
int i;
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("spawn: %s -- %s", wp->shell, cmd);
for (i = 0; i < wp->argc; i++)
log_debug("spawn: argv[%d] = %s", i, wp->argv[i]);
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environ_log(env, "spawn: ");
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';
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");
}
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);
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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;
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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;
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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);
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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);
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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;
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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;
if (window_pane_visible(wp2))
input_key(wp2, key, NULL);
}
}
}
int
window_pane_visible(struct window_pane *wp)
{
struct window *w = wp->window;
if (wp->layout_cell == NULL)
return (0);
if (wp->xoff >= w->sx || wp->yoff >= w->sy)
return (0);
if (wp->xoff + wp->sx > w->sx || wp->yoff + wp->sy > w->sy)
return (0);
return (1);
}
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 *
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window_pane_choose_best(struct window_pane **list, u_int size)
{
struct window_pane *next, *best;
u_int i;
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if (size == 0)
return (NULL);
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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)
{
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struct window_pane *next, *best, **list;
u_int edge, left, right, end, size;
int status, found;
if (wp == NULL || !window_pane_visible(wp))
return (NULL);
status = options_get_number(wp->window->options, "pane-border-status");
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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 || !window_pane_visible(next))
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;
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if (!found)
continue;
list = xreallocarray(list, size + 1, sizeof *list);
list[size++] = next;
}
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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)
{
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struct window_pane *next, *best, **list;
u_int edge, left, right, end, size;
int status, found;
if (wp == NULL || !window_pane_visible(wp))
return (NULL);
status = options_get_number(wp->window->options, "pane-border-status");
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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 || !window_pane_visible(next))
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;
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if (!found)
continue;
list = xreallocarray(list, size + 1, sizeof *list);
list[size++] = next;
}
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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)
{
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struct window_pane *next, *best, **list;
u_int edge, top, bottom, end, size;
int found;
if (wp == NULL || !window_pane_visible(wp))
return (NULL);
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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 || !window_pane_visible(next))
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;
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if (!found)
continue;
list = xreallocarray(list, size + 1, sizeof *list);
list[size++] = next;
}
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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)
{
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struct window_pane *next, *best, **list;
u_int edge, top, bottom, end, size;
int found;
if (wp == NULL || !window_pane_visible(wp))
return (NULL);
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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 || !window_pane_visible(next))
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;
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if (!found)
continue;
list = xreallocarray(list, size + 1, sizeof *list);
list[size++] = next;
}
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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);
}