OpenBSD-4.6/usr.bin/tmux/session.c
/* $OpenBSD: session.c,v 1.1 2009/06/01 22:58:49 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/time.h>
#include <string.h>
#include <stdlib.h>
#include <unistd.h>
#include "tmux.h"
/* Global session list. */
struct sessions sessions;
struct winlink *session_next_activity(struct session *, struct winlink *);
struct winlink *session_previous_activity(struct session *, struct winlink *);
void
session_alert_cancel(struct session *s, struct winlink *wl)
{
struct session_alert *sa, *sb;
sa = SLIST_FIRST(&s->alerts);
while (sa != NULL) {
sb = sa;
sa = SLIST_NEXT(sa, entry);
if (wl == NULL || sb->wl == wl) {
SLIST_REMOVE(&s->alerts, sb, session_alert, entry);
xfree(sb);
}
}
}
void
session_alert_add(struct session *s, struct window *w, int type)
{
struct session_alert *sa;
struct winlink *wl;
RB_FOREACH(wl, winlinks, &s->windows) {
if (wl == s->curw)
continue;
if (wl->window == w &&
!session_alert_has(s, wl, type)) {
sa = xmalloc(sizeof *sa);
sa->wl = wl;
sa->type = type;
SLIST_INSERT_HEAD(&s->alerts, sa, entry);
}
}
}
int
session_alert_has(struct session *s, struct winlink *wl, int type)
{
struct session_alert *sa;
SLIST_FOREACH(sa, &s->alerts, entry) {
if (sa->wl == wl && sa->type == type)
return (1);
}
return (0);
}
int
session_alert_has_window(struct session *s, struct window *w, int type)
{
struct session_alert *sa;
SLIST_FOREACH(sa, &s->alerts, entry) {
if (sa->wl->window == w && sa->type == type)
return (1);
}
return (0);
}
/* Find session by name. */
struct session *
session_find(const char *name)
{
struct session *s;
u_int i;
for (i = 0; i < ARRAY_LENGTH(&sessions); i++) {
s = ARRAY_ITEM(&sessions, i);
if (s != NULL && strcmp(s->name, name) == 0)
return (s);
}
return (NULL);
}
/* Create a new session. */
struct session *
session_create(const char *name,
const char *cmd, const char *cwd, u_int sx, u_int sy, char **cause)
{
struct session *s;
u_int i;
s = xmalloc(sizeof *s);
s->flags = 0;
if (gettimeofday(&s->tv, NULL) != 0)
fatal("gettimeofday");
s->curw = NULL;
SLIST_INIT(&s->lastw);
RB_INIT(&s->windows);
SLIST_INIT(&s->alerts);
paste_init_stack(&s->buffers);
options_init(&s->options, &global_options);
s->sx = sx;
s->sy = sy;
for (i = 0; i < ARRAY_LENGTH(&sessions); i++) {
if (ARRAY_ITEM(&sessions, i) == NULL) {
ARRAY_SET(&sessions, i, s);
break;
}
}
if (i == ARRAY_LENGTH(&sessions))
ARRAY_ADD(&sessions, s);
if (name != NULL)
s->name = xstrdup(name);
else
xasprintf(&s->name, "%u", i);
if (session_new(s, NULL, cmd, cwd, -1, cause) == NULL) {
session_destroy(s);
return (NULL);
}
session_select(s, 0);
log_debug("session %s created", s->name);
return (s);
}
/* Destroy a session. */
void
session_destroy(struct session *s)
{
u_int i;
log_debug("session %s destroyed", s->name);
if (session_index(s, &i) != 0)
fatalx("session not found");
ARRAY_SET(&sessions, i, NULL);
while (!ARRAY_EMPTY(&sessions) && ARRAY_LAST(&sessions) == NULL)
ARRAY_TRUNC(&sessions, 1);
session_alert_cancel(s, NULL);
options_free(&s->options);
paste_free_stack(&s->buffers);
while (!SLIST_EMPTY(&s->lastw))
winlink_stack_remove(&s->lastw, SLIST_FIRST(&s->lastw));
while (!RB_EMPTY(&s->windows))
winlink_remove(&s->windows, RB_ROOT(&s->windows));
xfree(s->name);
xfree(s);
}
/* Find session index. */
int
session_index(struct session *s, u_int *i)
{
for (*i = 0; *i < ARRAY_LENGTH(&sessions); (*i)++) {
if (s == ARRAY_ITEM(&sessions, *i))
return (0);
}
return (-1);
}
/* Create a new window on a session. */
struct winlink *
session_new(struct session *s,
const char *name, const char *cmd, const char *cwd, int idx, char **cause)
{
struct window *w;
const char **env;
u_int hlimit;
env = server_fill_environ(s);
hlimit = options_get_number(&s->options, "history-limit");
w = window_create(name, cmd, cwd, env, s->sx, s->sy, hlimit, cause);
if (w == NULL)
return (NULL);
if (options_get_number(&s->options, "set-remain-on-exit"))
options_set_number(&w->options, "remain-on-exit", 1);
return (session_attach(s, w, idx, cause));
}
/* Attach a window to a session. */
struct winlink *
session_attach(struct session *s, struct window *w, int idx, char **cause)
{
struct winlink *wl;
if ((wl = winlink_add(&s->windows, w, idx)) == NULL)
xasprintf(cause, "index in use: %d", idx);
return (wl);
}
/* Detach a window from a session. */
int
session_detach(struct session *s, struct winlink *wl)
{
if (s->curw == wl &&
session_last(s) != 0 && session_previous(s, 0) != 0)
session_next(s, 0);
session_alert_cancel(s, wl);
winlink_stack_remove(&s->lastw, wl);
winlink_remove(&s->windows, wl);
if (RB_EMPTY(&s->windows)) {
session_destroy(s);
return (1);
}
return (0);
}
/* Return if session has window. */
int
session_has(struct session *s, struct window *w)
{
struct winlink *wl;
RB_FOREACH(wl, winlinks, &s->windows) {
if (wl->window == w)
return (1);
}
return (0);
}
struct winlink *
session_next_activity(struct session *s, struct winlink *wl)
{
while (wl != NULL) {
if (session_alert_has(s, wl, WINDOW_BELL))
break;
if (session_alert_has(s, wl, WINDOW_ACTIVITY))
break;
if (session_alert_has(s, wl, WINDOW_CONTENT))
break;
wl = winlink_next(&s->windows, wl);
}
return (wl);
}
/* Move session to next window. */
int
session_next(struct session *s, int activity)
{
struct winlink *wl;
if (s->curw == NULL)
return (-1);
wl = winlink_next(&s->windows, s->curw);
if (activity)
wl = session_next_activity(s, wl);
if (wl == NULL) {
wl = RB_MIN(winlinks, &s->windows);
if (activity && ((wl = session_next_activity(s, wl)) == NULL))
return (-1);
}
if (wl == s->curw)
return (1);
winlink_stack_remove(&s->lastw, wl);
winlink_stack_push(&s->lastw, s->curw);
s->curw = wl;
session_alert_cancel(s, wl);
return (0);
}
struct winlink *
session_previous_activity(struct session *s, struct winlink *wl)
{
while (wl != NULL) {
if (session_alert_has(s, wl, WINDOW_BELL))
break;
if (session_alert_has(s, wl, WINDOW_ACTIVITY))
break;
if (session_alert_has(s, wl, WINDOW_CONTENT))
break;
wl = winlink_previous(&s->windows, wl);
}
return (wl);
}
/* Move session to previous window. */
int
session_previous(struct session *s, int activity)
{
struct winlink *wl;
if (s->curw == NULL)
return (-1);
wl = winlink_previous(&s->windows, s->curw);
if (activity)
wl = session_previous_activity(s, wl);
if (wl == NULL) {
wl = RB_MAX(winlinks, &s->windows);
if (activity && (wl = session_previous_activity(s, wl)) == NULL)
return (-1);
}
if (wl == s->curw)
return (1);
winlink_stack_remove(&s->lastw, wl);
winlink_stack_push(&s->lastw, s->curw);
s->curw = wl;
session_alert_cancel(s, wl);
return (0);
}
/* Move session to specific window. */
int
session_select(struct session *s, int idx)
{
struct winlink *wl;
wl = winlink_find_by_index(&s->windows, idx);
if (wl == NULL)
return (-1);
if (wl == s->curw)
return (1);
winlink_stack_remove(&s->lastw, wl);
winlink_stack_push(&s->lastw, s->curw);
s->curw = wl;
session_alert_cancel(s, wl);
return (0);
}
/* Move session to last used window. */
int
session_last(struct session *s)
{
struct winlink *wl;
wl = SLIST_FIRST(&s->lastw);
if (wl == NULL)
return (-1);
if (wl == s->curw)
return (1);
winlink_stack_remove(&s->lastw, wl);
winlink_stack_push(&s->lastw, s->curw);
s->curw = wl;
session_alert_cancel(s, wl);
return (0);
}