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/* $Id: session.c,v 1.19 2007-09-29 21:02:26 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 <string.h>
#include <stdlib.h>
#include <unistd.h>
#include "tmux.h"
/* Global session list. */
struct sessions sessions;
/* 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, u_int sx, u_int sy)
{
struct session *s;
u_int i;
s = xmalloc(sizeof *s);
s->tim = time(NULL);
s->window = s->last = NULL;
ARRAY_INIT(&s->windows);
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 != '\0')
strlcpy(s->name, name, sizeof s->name);
else
xsnprintf(s->name, sizeof s->name, "%u", i);
if (session_new(s, cmd, sx, sy) != 0) {
session_destroy(s);
return (NULL);
}
return (s);
}
/* Destroy a session. */
void
session_destroy(struct session *s)
{
u_int i;
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);
while (!ARRAY_EMPTY(&s->windows))
window_remove(&s->windows, ARRAY_FIRST(&s->windows));
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. */
int
session_new(struct session *s, const char *cmd, u_int sx, u_int sy)
{
struct window *w;
const char *environ[] = { NULL, "TERM=screen", NULL };
char buf[256];
u_int i;
if (session_index(s, &i) != 0)
fatalx("session not found");
xsnprintf(buf, sizeof buf, "TMUX=%ld,%u", (long) getpid(), i);
environ[0] = buf;
if ((w = window_create(cmd, environ, sx, sy)) == NULL)
return (-1);
session_attach(s, w);
s->last = s->window;
s->window = w;
return (0);
}
/* Attach a window to a session. */
void
session_attach(struct session *s, struct window *w)
{
window_add(&s->windows, w);
}
/* Detach a window from a session. */
int
session_detach(struct session *s, struct window *w)
{
if (s->window == w && session_last(s) != 0 && session_previous(s) != 0)
session_next(s);
if (s->last == w)
s->last = NULL;
window_remove(&s->windows, w);
if (ARRAY_EMPTY(&s->windows)) {
session_destroy(s);
return (1);
}
return (0);
}
/* Return if session has window. */
int
session_has(struct session *s, struct window *w)
{
u_int i;
return (window_index(&s->windows, w, &i) == 0);
}
/* Move session to next window. */
int
session_next(struct session *s)
{
struct window *w;
u_int n;
if (s->window == NULL)
return (-1);
w = window_next(&s->windows, s->window);
if (w == NULL) {
n = 0;
while ((w = ARRAY_ITEM(&s->windows, n)) == NULL)
n++;
if (w == s->window)
return (1);
}
if (w == s->window)
return (0);
s->last = s->window;
s->window = w;
return (0);
}
/* Move session to previous window. */
int
session_previous(struct session *s)
{
struct window *w;
if (s->window == NULL)
return (-1);
w = window_previous(&s->windows, s->window);
if (w == NULL) {
w = ARRAY_LAST(&s->windows);
if (w == s->window)
return (1);
}
if (w == s->window)
return (0);
s->last = s->window;
s->window = w;
return (0);
}
/* Move session to specific window. */
int
session_select(struct session *s, u_int i)
{
struct window *w;
w = window_at(&s->windows, i);
if (w == NULL)
return (-1);
if (w == s->window)
return (0);
s->last = s->window;
s->window = w;
return (0);
}
/* Move session to last used window. */
int
session_last(struct session *s)
{
struct window *w;
w = s->last;
if (w == NULL)
return (-1);
if (w == s->window)
return (1);
s->last = s->window;
s->window = w;
return (0);
}
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