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Rewrite of the target resolution internals to be simpler and more
consistent but with much less duplication, but keeping the same internal
API. Also adds more readable aliases for some of the special tokens used
in targets (eg "{start}" instead of "^"). Some behaviours may have
changed, for example prefix matches now happen before fnmatch.

/* $OpenBSD: cmd-choose-client.c,v 1.24 2015/04/27 16:25:57 nicm Exp $ */

/*
 * Copyright (c) 2009 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 <ctype.h>
#include <stdlib.h>

#include "tmux.h"

/*
 * Enter choice mode to choose a client.
 */

#define CHOOSE_CLIENT_TEMPLATE					\
	"#{client_tty}: #{session_name} "			\
	"[#{client_width}x#{client_height} #{client_termname}]"	\
	"#{?client_utf8, (utf8),}#{?client_readonly, (ro),} "	\
	"(last used #{client_activity_string})"

enum cmd_retval	 cmd_choose_client_exec(struct cmd *, struct cmd_q *);

void	cmd_choose_client_callback(struct window_choose_data *);

const struct cmd_entry cmd_choose_client_entry = {
	"choose-client", NULL,
	"F:t:", 0, 1,
	CMD_TARGET_WINDOW_USAGE " [-F format] [template]",
	0,
	cmd_choose_client_exec
};

struct cmd_choose_client_data {
	struct client	*client;
};

enum cmd_retval
cmd_choose_client_exec(struct cmd *self, struct cmd_q *cmdq)
{
	struct args			*args = self->args;
	struct client			*c;
	struct client			*c1;
	struct window_choose_data	*cdata;
	struct winlink			*wl;
	const char			*template;
	char				*action;
	u_int			 	 idx, cur;

	if ((c = cmd_find_client(cmdq, NULL, 1)) == NULL) {
		cmdq_error(cmdq, "no client available");
		return (CMD_RETURN_ERROR);
	}

	if ((wl = cmd_find_window(cmdq, args_get(args, 't'), NULL)) == NULL)
		return (CMD_RETURN_ERROR);

	if (window_pane_set_mode(wl->window->active, &window_choose_mode) != 0)
		return (CMD_RETURN_NORMAL);

	if ((template = args_get(args, 'F')) == NULL)
		template = CHOOSE_CLIENT_TEMPLATE;

	if (args->argc != 0)
		action = xstrdup(args->argv[0]);
	else
		action = xstrdup("detach-client -t '%%'");

	cur = idx = 0;
	TAILQ_FOREACH(c1, &clients, entry) {
		if (c1->session == NULL || c1->tty.path == NULL)
			continue;
		if (c1 == cmdq->client)
			cur = idx;

		cdata = window_choose_data_create(TREE_OTHER, c, c->session);
		cdata->idx = idx;

		cdata->ft_template = xstrdup(template);
		format_add(cdata->ft, "line", "%u", idx);
		format_defaults(cdata->ft, c1, NULL, NULL, NULL);

		cdata->command = cmd_template_replace(action, c1->tty.path, 1);

		window_choose_add(wl->window->active, cdata);

		idx++;
	}
	free(action);

	window_choose_ready(wl->window->active, cur,
	    cmd_choose_client_callback);

	return (CMD_RETURN_NORMAL);
}

void
cmd_choose_client_callback(struct window_choose_data *cdata)
{
	struct client  	*c;
	u_int		 idx;

	if (cdata == NULL)
		return;
	if (cdata->start_client->flags & CLIENT_DEAD)
		return;

	idx = 0;
	TAILQ_FOREACH(c, &clients, entry) {
		if (idx == cdata->idx)
			break;
		idx++;
	}
	if (c == NULL || c->session == NULL)
		return;

	window_choose_data_run(cdata);
}