tmux/window.c

558 lines
10 KiB
C
Raw Normal View History

2009-01-13 06:50:10 +00:00
/* $Id: window.c,v 1.57 2009-01-13 06:50:10 nicm Exp $ */
/*
* Copyright (c) 2007 Nicholas Marriott <nicm@users.sourceforge.net>
*
* 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 <fcntl.h>
#include <signal.h>
#include <stdint.h>
#include <stdlib.h>
#include <string.h>
#include <termios.h>
#include <unistd.h>
2007-10-19 20:47:09 +00:00
2008-06-18 19:34:50 +00:00
#ifndef NO_PATHS_H
#include <paths.h>
#endif
2007-10-19 20:47:09 +00:00
#ifdef USE_LIBUTIL_H
#include <libutil.h>
#else
2007-10-31 14:26:26 +00:00
#ifdef USE_PTY_H
#include <pty.h>
#else
2008-06-18 20:11:25 +00:00
#ifndef NO_FORKPTY
#include <util.h>
2007-10-19 20:47:09 +00:00
#endif
2007-10-31 14:26:26 +00:00
#endif
2008-06-18 20:11:25 +00:00
#endif
#include "tmux.h"
/*
* Each window is attached to one or two 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
2007-08-27 10:08:44 +00:00
* 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;
RB_GENERATE(winlinks, winlink, entry, winlink_cmp);
int
winlink_cmp(struct winlink *wl1, struct winlink *wl2)
{
return (wl1->idx - wl2->idx);
}
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));
}
int
winlink_next_index(struct winlinks *wwl)
{
u_int i;
for (i = 0; i < INT_MAX; i++) {
if (winlink_find_by_index(wwl, i) == NULL)
return (i);
}
fatalx("no free indexes");
}
2009-01-10 14:43:43 +00:00
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, struct window *w, int idx)
{
struct winlink *wl;
if (idx == -1)
idx = winlink_next_index(wwl);
else if (winlink_find_by_index(wwl, idx) != NULL)
return (NULL);
if (idx < 0)
fatalx("bad index");
wl = xcalloc(1, sizeof *wl);
wl->idx = idx;
wl->window = w;
RB_INSERT(winlinks, wwl, wl);
w->references++;
return (wl);
}
void
winlink_remove(struct winlinks *wwl, struct winlink *wl)
{
struct window *w = wl->window;
RB_REMOVE(winlinks, wwl, wl);
xfree(wl);
if (w->references == 0)
fatal("bad reference count");
w->references--;
if (w->references == 0)
window_destroy(w);
}
struct winlink *
winlink_next(unused struct winlinks *wwl, struct winlink *wl)
{
return (RB_NEXT(winlinks, wwl, wl));
}
struct winlink *
2008-06-03 18:38:51 +00:00
winlink_previous(unused struct winlinks *wwl, struct winlink *wl)
{
2008-06-04 20:17:25 +00:00
#ifdef RB_PREV
2008-06-03 18:38:51 +00:00
return (RB_PREV(winlinks, wwl, wl));
2008-06-04 20:17:25 +00:00
#else
struct winlink *wk;
int idx = wl->idx;
wk = NULL;
wl = RB_MIN(winlinks, wwl);
while (wl != NULL && wl->idx < idx) {
wk = wl;
wl = RB_NEXT(winlinks, wwl, wl);
}
if (wl == NULL)
return (NULL);
return (wk);
#endif
}
void
winlink_stack_push(struct winlink_stack *stack, struct winlink *wl)
{
if (wl == NULL)
return;
winlink_stack_remove(stack, wl);
SLIST_INSERT_HEAD(stack, wl, sentry);
}
void
winlink_stack_remove(struct winlink_stack *stack, struct winlink *wl)
{
struct winlink *wl2;
if (wl == NULL)
return;
SLIST_FOREACH(wl2, stack, sentry) {
if (wl2 == wl) {
SLIST_REMOVE(stack, wl, winlink, sentry);
return;
}
}
}
struct window *
2009-01-10 19:37:35 +00:00
window_create(const char *name, const char *cmd,
const char *cwd, const char **envp, u_int sx, u_int sy, u_int hlimit)
{
struct window *w;
2007-10-03 23:32:26 +00:00
char *ptr, *copy;
w = xmalloc(sizeof *w);
w->flags = 0;
w->panes[0] = NULL;
w->panes[1] = NULL;
w->sx = sx;
w->sy = sy;
options_init(&w->options, &global_window_options);
2007-10-03 23:32:26 +00:00
if (name == NULL) {
/* XXX */
if (strncmp(cmd, "exec ", (sizeof "exec ") - 1) == 0)
2007-10-04 20:33:16 +00:00
copy = xstrdup(cmd + (sizeof "exec ") - 1);
2007-10-03 23:32:26 +00:00
else
copy = xstrdup(cmd);
if ((ptr = strchr(copy, ' ')) != NULL) {
if (ptr != copy && ptr[-1] != '\\')
*ptr = '\0';
else {
while ((ptr = strchr(ptr + 1, ' ')) != NULL) {
if (ptr[-1] != '\\') {
*ptr = '\0';
break;
}
}
}
}
2007-10-03 23:32:26 +00:00
w->name = xstrdup(xbasename(copy));
xfree(copy);
} else
w->name = xstrdup(name);
ARRAY_ADD(&windows, w);
w->references = 0;
if (window_add_pane(w, w->sy, cmd, cwd, envp, hlimit) < 0) {
window_destroy(w);
return (NULL);
}
w->active = w->panes[0];
return (w);
}
void
window_destroy(struct window *w)
{
u_int i;
for (i = 0; i < ARRAY_LENGTH(&windows); i++) {
if (ARRAY_ITEM(&windows, i) == w)
break;
}
ARRAY_REMOVE(&windows, i);
options_free(&w->options);
window_pane_destroy(w->panes[0]);
if (w->panes[1] != NULL)
window_pane_destroy(w->panes[1]);
xfree(w->name);
xfree(w);
}
int
window_resize(struct window *w, u_int sx, u_int sy)
{
int change;
u_int y0, y1;
if (w->panes[1] == NULL)
window_pane_resize(w->panes[0], sx, sy);
else {
if (sy <= 3) {
y0 = 1;
y1 = 1;
} else {
y0 = w->panes[0]->sy;
y1 = w->panes[1]->sy;
change = sy - w->sy;
if (change > 0) {
while (change > 0) {
if (y1 < y0)
y1++;
else
y0++;
change--;
}
} else if (change < 0) {
while (change < 0) {
if (y1 > y0)
y1--;
else
y0--;
change++;
}
}
}
window_pane_resize(w->panes[0], sx, y0);
window_pane_resize(w->panes[1], sx, y1);
w->panes[1]->yoff = y0 + 1;
}
w->sx = sx;
w->sy = sy;
return (0);
}
int
window_add_pane(struct window *w, u_int y1,
const char *cmd, const char *cwd, const char **envp, u_int hlimit)
{
struct window_pane *wp;
u_int y0;
if (w->panes[1] != NULL)
return (-1);
if (w->panes[0] == NULL) {
/* No existing panes. */
wp = w->panes[0] = window_pane_create(w, w->sx, w->sy, hlimit);
wp->yoff = 0;
} else {
/* One existing pane. */
if (y1 > w->sy)
y1 = w->sy;
y0 = w->sy - y1;
if (y0 == 0) {
y0 = 1;
y1--;
}
if (y0 > 1)
y0--;
else if (y1 > 1)
y1--;
window_pane_resize(w->panes[0], w->sx, y0);
wp = w->panes[1] = window_pane_create(w, w->sx, y1, hlimit);
wp->yoff = y0 + 1;
}
if (window_pane_spawn(wp, cmd, cwd, envp) != 0) {
2009-01-13 06:50:10 +00:00
window_remove_pane(w, wp);
return (-1);
}
return (0);
}
int
2009-01-13 06:50:10 +00:00
window_remove_pane(struct window *w, struct window_pane *wp)
{
2009-01-13 06:50:10 +00:00
int pane;
pane = 0;
if (wp == w->panes[1])
pane = 1;
if (w->panes[1] != NULL) {
window_pane_destroy(w->panes[pane]);
w->panes[pane] = NULL;
if (pane == 0) {
w->panes[0] = w->panes[1];
w->panes[1] = NULL;
}
w->active = w->panes[0];
window_pane_resize(w->active, w->sx, w->sy);
w->active->yoff = 0;
return (0);
}
return (1);
}
struct window_pane *
window_pane_create(struct window *w, u_int sx, u_int sy, u_int hlimit)
{
struct window_pane *wp;
wp = xmalloc(sizeof *wp);
wp->window = w;
wp->cmd = NULL;
wp->cwd = NULL;
wp->fd = -1;
wp->in = buffer_create(BUFSIZ);
wp->out = buffer_create(BUFSIZ);
wp->mode = NULL;
wp->sx = sx;
wp->sy = sy;
wp->yoff = 0;
screen_init(&wp->base, sx, sy, hlimit);
wp->screen = &wp->base;
input_init(wp);
return (wp);
}
void
window_pane_destroy(struct window_pane *wp)
{
if (wp->fd != -1)
close(wp->fd);
input_free(wp);
window_pane_reset_mode(wp);
screen_free(&wp->base);
buffer_destroy(wp->in);
buffer_destroy(wp->out);
if (wp->cwd != NULL)
xfree(wp->cwd);
if (wp->cmd != NULL)
xfree(wp->cmd);
xfree(wp);
}
int
window_pane_spawn(struct window_pane *wp,
const char *cmd, const char *cwd, const char **envp)
{
struct winsize ws;
int mode;
const char **envq;
if (wp->fd != -1)
close(wp->fd);
if (cmd != NULL) {
if (wp->cmd != NULL)
xfree(wp->cmd);
wp->cmd = xstrdup(cmd);
}
if (cwd != NULL) {
if (wp->cwd != NULL)
xfree(wp->cwd);
wp->cwd = xstrdup(cwd);
}
memset(&ws, 0, sizeof ws);
ws.ws_col = screen_size_x(&wp->base);
ws.ws_row = screen_size_y(&wp->base);
switch (forkpty(&wp->fd, NULL, NULL, &ws)) {
case -1:
return (1);
case 0:
if (chdir(wp->cwd) != 0)
2009-01-10 19:37:35 +00:00
chdir("/");
for (envq = envp; *envq != NULL; envq++) {
if (putenv(*envq) != 0)
fatal("putenv failed");
}
sigreset();
log_close();
execl(_PATH_BSHELL, "sh", "-c", wp->cmd, (char *) NULL);
fatal("execl failed");
}
if ((mode = fcntl(wp->fd, F_GETFL)) == -1)
fatal("fcntl failed");
if (fcntl(wp->fd, F_SETFL, mode|O_NONBLOCK) == -1)
fatal("fcntl failed");
if (fcntl(wp->fd, F_SETFD, FD_CLOEXEC) == -1)
fatal("fcntl failed");
2008-09-26 06:45:28 +00:00
return (0);
}
int
window_pane_resize(struct window_pane *wp, u_int sx, u_int sy)
{
struct winsize ws;
if (sx == wp->sx && sy == wp->sy)
return (-1);
wp->sx = sx;
wp->sy = sy;
memset(&ws, 0, sizeof ws);
ws.ws_col = sx;
ws.ws_row = sy;
screen_resize(&wp->base, sx, sy);
if (wp->mode != NULL)
wp->mode->resize(wp, sx, sy);
if (wp->fd != -1 && ioctl(wp->fd, TIOCSWINSZ, &ws) == -1)
2007-07-25 23:13:18 +00:00
fatal("ioctl failed");
return (0);
}
2007-12-06 10:04:43 +00:00
int
window_pane_set_mode(struct window_pane *wp, const struct window_mode *mode)
2007-12-06 10:04:43 +00:00
{
struct screen *s;
if (wp->mode != NULL || wp->mode == mode)
2007-12-06 10:04:43 +00:00
return (1);
wp->mode = mode;
2007-12-06 10:04:43 +00:00
if ((s = wp->mode->init(wp)) != NULL)
wp->screen = s;
server_redraw_window(wp->window);
2007-12-06 10:04:43 +00:00
return (0);
}
void
window_pane_reset_mode(struct window_pane *wp)
2007-12-06 10:04:43 +00:00
{
if (wp->mode == NULL)
2007-12-06 10:04:43 +00:00
return;
wp->mode->free(wp);
wp->mode = NULL;
2007-12-06 10:04:43 +00:00
wp->screen = &wp->base;
server_redraw_window(wp->window);
2007-12-06 10:04:43 +00:00
}
2007-11-21 13:11:41 +00:00
void
window_pane_parse(struct window_pane *wp)
2007-11-21 13:11:41 +00:00
{
input_parse(wp);
2007-11-21 13:11:41 +00:00
}
void
window_pane_key(struct window_pane *wp, struct client *c, int key)
2007-11-21 13:11:41 +00:00
{
if (wp->mode != NULL)
wp->mode->key(wp, c, key);
2007-11-21 13:11:41 +00:00
else
input_key(wp, key);
2007-11-21 13:11:41 +00:00
}