path: root/cmd-find.c

/* $OpenBSD$ */

/*
 * Copyright (c) 2015 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 <fnmatch.h>
#include <limits.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>

#include "tmux.h"

static struct session *cmd_find_try_TMUX(struct client *, struct window *);
static int	cmd_find_client_better(struct client *, struct client *);
static struct client *cmd_find_best_client(struct client **, u_int);
static int	cmd_find_session_better(struct session *, struct session *,
		    int);
static struct session *cmd_find_best_session(struct session **, u_int, int);
static int	cmd_find_best_session_with_window(struct cmd_find_state *);
static int	cmd_find_best_winlink_with_window(struct cmd_find_state *);

static int	cmd_find_current_session_with_client(struct cmd_find_state *);
static int	cmd_find_current_session(struct cmd_find_state *);
static struct client *cmd_find_current_client(struct cmdq_item *);

static const char *cmd_find_map_table(const char *[][2], const char *);

static int	cmd_find_get_session(struct cmd_find_state *, const char *);
static int	cmd_find_get_window(struct cmd_find_state *, const char *);
static int	cmd_find_get_window_with_session(struct cmd_find_state *,
		    const char *);
static int	cmd_find_get_pane(struct cmd_find_state *, const char *);
static int	cmd_find_get_pane_with_session(struct cmd_find_state *,
		    const char *);
static int	cmd_find_get_pane_with_window(struct cmd_find_state *,
		    const char *);

static const char *cmd_find_session_table[][2] = {
	{ NULL, NULL }
};
static const char *cmd_find_window_table[][2] = {
	{ "{start}", "^" },
	{ "{last}", "!" },
	{ "{end}", "$" },
	{ "{next}", "+" },
	{ "{previous}", "-" },
	{ NULL, NULL }
};
static const char *cmd_find_pane_table[][2] = {
	{ "{last}", "!" },
	{ "{next}", "+" },
	{ "{previous}", "-" },
	{ "{top}", "top" },
	{ "{bottom}", "bottom" },
	{ "{left}", "left" },
	{ "{right}", "right" },
	{ "{top-left}", "top-left" },
	{ "{top-right}", "top-right" },
	{ "{bottom-left}", "bottom-left" },
	{ "{bottom-right}", "bottom-right" },
	{ "{up-of}", "{up-of}" },
	{ "{down-of}", "{down-of}" },
	{ "{left-of}", "{left-of}" },
	{ "{right-of}", "{right-of}" },
	{ NULL, NULL }
};

/* Get session from TMUX if present. */
static struct session *
cmd_find_try_TMUX(struct client *c, struct window *w)
{
	struct environ_entry	*envent;
	char			 tmp[256];
	long long		 pid;
	u_int			 session;
	struct session		*s;

	envent = environ_find(c->environ, "TMUX");
	if (envent == NULL)
		return (NULL);

	if (sscanf(envent->value, "%255[^,],%lld,%d", tmp, &pid, &session) != 3)
		return (NULL);
	if (pid != getpid())
		return (NULL);
	log_debug("client %p TMUX is %s (session @%u)", c, envent->value,
	    session);

	s = session_find_by_id(session);
	if (s == NULL || (w != NULL && !session_has(s, w)))
		return (NULL);
	return (s);
}

/* Is this client better? */
static int
cmd_find_client_better(struct client *c, struct client *than)
{
	if (than == NULL)
		return (1);
	return (timercmp(&c->activity_time, &than->activity_time, >));
}

/* Find best client from a list, or all if list is NULL. */
static struct client *
cmd_find_best_client(struct client **clist, u_int csize)
{
	struct client	*c_loop, *c;
	u_int		 i;

	c = NULL;
	if (clist != NULL) {
		for (i = 0; i < csize; i++) {
			if (clist[i]->session == NULL)
				continue;
			if (cmd_find_client_better(clist[i], c))
				c = clist[i];
		}
	} else {
		TAILQ_FOREACH(c_loop, &clients, entry) {
			if (c_loop->session == NULL)
				continue;
			if (cmd_find_client_better(c_loop, c))
				c = c_loop;
		}
	}