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Add a command queue to standardize and simplify commands that call other
commands and allow a command to block execution of subsequent
commands. This allows run-shell and if-shell to be synchronous which has
been much requested.

Each client has a default command queue and commands are consumed one at
a time from it. A command may suspend execution from the queue by
returning CMD_RETURN_WAIT and then resume it by calling cmd_continue() -
for example run-shell does this from the callback that is fired after
the job is freed.

When the command queue becomes empty, command clients are automatically
exited (unless attaching). A callback is also fired - this is used for
nested commands in, for example, if-shell which can block execution of
the client's cmdq until a new cmdq becomes empty.

Also merge all the old error/info/print functions together and lose the
old curclient/cmdclient distinction - a cmdq is bound to one client (or
none if in the configuration file), this is a command client if
c->session is NULL otherwise an attached client.

/* $OpenBSD: cmd-send-keys.c,v 1.15 2013/03/24 09:54:10 nicm Exp $ */

/*
 * Copyright (c) 2008 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 <stdlib.h>
#include <string.h>

#include "tmux.h"

/*
 * Send keys to client.
 */

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

const struct cmd_entry cmd_send_keys_entry = {
	"send-keys", "send",
	"lRt:", 0, -1,
	"[-lR] " CMD_TARGET_PANE_USAGE " key ...",
	0,
	NULL,
	NULL,
	cmd_send_keys_exec
};

const struct cmd_entry cmd_send_prefix_entry = {
	"send-prefix", NULL,
	"2t:", 0, 0,
	"[-2] " CMD_TARGET_PANE_USAGE,
	0,
	NULL,
	NULL,
	cmd_send_keys_exec
};

enum cmd_retval
cmd_send_keys_exec(struct cmd *self, struct cmd_q *cmdq)
{
	struct args		*args = self->args;
	struct window_pane	*wp;
	struct session		*s;
	struct input_ctx	*ictx;
	const char		*str;
	int			 i, key;

	if (cmd_find_pane(cmdq, args_get(args, 't'), &s, &wp) == NULL)
		return (CMD_RETURN_ERROR);

	if (self->entry == &cmd_send_prefix_entry) {
		if (args_has(args, '2'))
			key = options_get_number(&s->options, "prefix2");
		else
			key = options_get_number(&s->options, "prefix");
		window_pane_key(wp, s, key);
		return (CMD_RETURN_NORMAL);
	}

	if (args_has(args, 'R')) {
		ictx = &wp->ictx;

		memcpy(&ictx->cell, &grid_default_cell, sizeof ictx->cell);
		memcpy(&ictx->old_cell, &ictx->cell, sizeof ictx->old_cell);
		ictx->old_cx = 0;
		ictx->old_cy = 0;

		if (wp->mode == NULL)
			screen_write_start(&ictx->ctx, wp, &wp->base);
		else
			screen_write_start(&ictx->ctx, NULL, &wp->base);
		screen_write_reset(&ictx->ctx);
		screen_write_stop(&ictx->ctx);
	}

	for (i = 0; i < args->argc; i++) {
		str = args->argv[i];

		if (!args_has(args, 'l') &&
		    (key = key_string_lookup_string(str)) != KEYC_NONE) {
			    window_pane_key(wp, s, key);
		} else {
			for (; *str != '\0'; str++)
			    window_pane_key(wp, s, *str);
		}
	}

	return (CMD_RETURN_NORMAL);
}