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Tidy up the terminal detection and feature code and add named sets of
terminal features, each of which are defined in one place and map to a
builtin set of terminfo(5) capabilities. Features can be specified based
on TERM with a new terminal-features option or with the -T flag when
running tmux. tmux will also detect a few common terminals from the DA
and DSR responses.

This is intended to make it easier to configure tmux's use of
terminfo(5) even in the presence of outdated ncurses(3) or terminfo(5)
databases or for features which do not yet have a terminfo(5) entry.
Instead of having to grok terminfo(5) capability names and what they
should be set to in the terminal-overrides option, the user can
hopefully just give tmux a feature name and let it do the right thing.

The terminal-overrides option remains both for backwards compatibility
and to allow tweaks of individual capabilities.

tmux already did much of this already, this makes it tidier and simpler
to configure.

/* $OpenBSD: cmd-show-messages.c,v 1.32 2020/04/20 13:25:36 nicm Exp $ */

/*
 * Copyright (c) 2009 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 <string.h>
#include <time.h>
#include <unistd.h>
#include <vis.h>

#include "tmux.h"

/*
 * Show client message log.
 */

static enum cmd_retval	cmd_show_messages_exec(struct cmd *,
			    struct cmdq_item *);

const struct cmd_entry cmd_show_messages_entry = {
	.name = "show-messages",
	.alias = "showmsgs",

	.args = { "JTt:", 0, 0 },
	.usage = "[-JT] " CMD_TARGET_CLIENT_USAGE,

	.flags = CMD_AFTERHOOK|CMD_CLIENT_TFLAG,
	.exec = cmd_show_messages_exec
};

static int
cmd_show_messages_terminals(struct cmd *self, struct cmdq_item *item, int blank)
{
	struct args	*args = cmd_get_args(self);
	struct client	*tc = cmdq_get_target_client(item);
	struct tty_term	*term;
	u_int		 i, n;

	n = 0;
	LIST_FOREACH(term, &tty_terms, entry) {
		if (args_has(args, 't') && term != tc->tty.term)
			continue;
		if (blank) {
			cmdq_print(item, "%s", "");
			blank = 0;
		}
		cmdq_print(item, "Terminal %u: %s for %s, flags=0x%x:", n,
		    term->name, term->tty->client->name, term->flags);
		n++;
		for (i = 0; i < tty_term_ncodes(); i++)
			cmdq_print(item, "%s", tty_term_describe(term, i));
	}
	return (n != 0);
}

static enum cmd_retval
cmd_show_messages_exec(struct cmd *self, struct cmdq_item *item)
{
	struct args		*args = cmd_get_args(self);
	struct client		*tc = cmdq_get_target_client(item);
	struct message_entry	*msg;
	char			*tim;
	int			 done, blank;

	done = blank = 0;
	if (args_has(args, 'T')) {
		blank = cmd_show_messages_terminals(self, item, blank);
		done = 1;
	}
	if (args_has(args, 'J')) {
		job_print_summary(item, blank);
		done = 1;
	}
	if (done)
		return (CMD_RETURN_NORMAL);

	TAILQ_FOREACH(msg, &tc->message_log, entry) {
		tim = ctime(&msg->msg_time);
		*strchr(tim, '\n') = '\0';
		cmdq_print(item, "%s %s", tim, msg->msg);
	}

	return (CMD_RETURN_NORMAL);
}