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kill-window -a cannot just walk the list of windows because if
renumber-windows is on, the window it wants to keep could be moved.
Change to renumber afterwards and also behave better if the window is
linked into the session twice. GitHub issue 2287.

/* $OpenBSD: cmd-kill-window.c,v 1.27 2020/07/04 14:24:02 nicm Exp $ */

/*
 * Copyright (c) 2007 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 "tmux.h"

/*
 * Destroy window.
 */

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

const struct cmd_entry cmd_kill_window_entry = {
	.name = "kill-window",
	.alias = "killw",

	.args = { "at:", 0, 0 },
	.usage = "[-a] " CMD_TARGET_WINDOW_USAGE,

	.target = { 't', CMD_FIND_WINDOW, 0 },

	.flags = 0,
	.exec = cmd_kill_window_exec
};

const struct cmd_entry cmd_unlink_window_entry = {
	.name = "unlink-window",
	.alias = "unlinkw",

	.args = { "kt:", 0, 0 },
	.usage = "[-k] " CMD_TARGET_WINDOW_USAGE,

	.target = { 't', CMD_FIND_WINDOW, 0 },

	.flags = 0,
	.exec = cmd_kill_window_exec
};

static enum cmd_retval
cmd_kill_window_exec(struct cmd *self, struct cmdq_item *item)
{
	struct args		*args = cmd_get_args(self);
	struct cmd_find_state	*target = cmdq_get_target(item);
	struct winlink		*wl = target->wl, *loop;
	struct window		*w = wl->window;
	struct session		*s = target->s;
	u_int			 found;

	if (cmd_get_entry(self) == &cmd_unlink_window_entry) {
		if (!args_has(args, 'k') && !session_is_linked(s, w)) {
			cmdq_error(item, "window only linked to one session");
			return (CMD_RETURN_ERROR);
		}
		server_unlink_window(s, wl);
		recalculate_sizes();
		return (CMD_RETURN_NORMAL);
	}

	if (args_has(args, 'a')) {
		if (RB_PREV(winlinks, &s->windows, wl) == NULL &&
		    RB_NEXT(winlinks, &s->windows, wl) == NULL)
			return (CMD_RETURN_NORMAL);

		/* Kill all windows except the current one. */
		do {
			found = 0;
			RB_FOREACH(loop, winlinks, &s->windows) {
				if (loop->window != wl->window) {
					server_kill_window(loop->window, 0);
					found++;
					break;
				}
			}
		} while (found != 0);

		/*
		 * If the current window appears in the session more than once,
		 * kill it as well.
		 */
		found = 0;
		RB_FOREACH(loop, winlinks, &s->windows) {
			if (loop->window == wl->window)
				found++;
		}
		if (found > 1)
			server_kill_window(wl->window, 0);

		server_renumber_all();
		return (CMD_RETURN_NORMAL);
	}

	server_kill_window(wl->window, 1);
	return (CMD_RETURN_NORMAL);
}