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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-kill-pane.c,v 1.13 2013/03/24 09:54:10 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 <stdlib.h>

#include "tmux.h"

/*
 * Kill pane.
 */

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

const struct cmd_entry cmd_kill_pane_entry = {
	"kill-pane", "killp",
	"at:", 0, 0,
	"[-a] " CMD_TARGET_PANE_USAGE,
	0,
	NULL,
	NULL,
	cmd_kill_pane_exec
};

enum cmd_retval
cmd_kill_pane_exec(struct cmd *self, struct cmd_q *cmdq)
{
	struct args		*args = self->args;
	struct winlink		*wl;
	struct window_pane	*loopwp, *tmpwp, *wp;

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

	if (window_count_panes(wl->window) == 1) {
		/* Only one pane, kill the window. */
		server_kill_window(wl->window);
		recalculate_sizes();
		return (CMD_RETURN_NORMAL);
	}

	if (args_has(self->args, 'a')) {
		TAILQ_FOREACH_SAFE(loopwp, &wl->window->panes, entry, tmpwp) {
			if (loopwp == wp)
				continue;
			layout_close_pane(loopwp);
			window_remove_pane(wl->window, loopwp);
		}
	} else {
		layout_close_pane(wp);
		window_remove_pane(wl->window, wp);
	}
	server_redraw_window(wl->window);

	return (CMD_RETURN_NORMAL);
}