text: /* $OpenBSD$ */
  
  /*
   * 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 <stdlib.h>
  
  #include "tmux.h"
  
  /*
   * Swap one window with another.
   */
  
  static enum cmd_retval	cmd_swap_window_exec(struct cmd *, struct cmdq_item *);
  
  const struct cmd_entry cmd_swap_window_entry = {
  	.name = "swap-window",
  	.alias = "swapw",
  
  	.args = { "ds:t:", 0, 0, NULL },
  	.usage = "[-d] " CMD_SRCDST_WINDOW_USAGE,
  
  	.source = { 's', CMD_FIND_WINDOW, CMD_FIND_DEFAULT_MARKED },
  	.target = { 't', CMD_FIND_WINDOW, 0 },
  
  	.flags = 0,
  	.exec = cmd_swap_window_exec
  };
  
  static enum cmd_retval
  cmd_swap_window_exec(struct cmd *self, struct cmdq_item *item)
  {
  	struct args		*args = cmd_get_args(self);
  	struct cmd_find_state	*source = cmdq_get_source(item);
  	struct cmd_find_state	*target = cmdq_get_target(item);
  	struct session		*src = source->s, *dst = target->s;
  	struct session_group	*sg_src, *sg_dst;
  	struct winlink		*wl_src = source->wl, *wl_dst = target->wl;
  	struct window		*w_src, *w_dst;
  
  	sg_src = session_group_contains(src);
  	sg_dst = session_group_contains(dst);
  
  	if (src != dst &&
  	    sg_src != NULL &&
  	    sg_dst != NULL &&
  	    sg_src == sg_dst) {
  		cmdq_error(item, "can't move window, sessions are grouped");
  		return (CMD_RETURN_ERROR);
  	}
  
  	if (wl_dst->window == wl_src->window)
  		return (CMD_RETURN_NORMAL);
  
  	w_dst = wl_dst->window;
  	TAILQ_REMOVE(&w_dst->winlinks, wl_dst, wentry);
  	w_src = wl_src->window;
  	TAILQ_REMOVE(&w_src->winlinks, wl_src, wentry);
  
  	wl_dst->window = w_src;
  	TAILQ_INSERT_TAIL(&w_src->winlinks, wl_dst, wentry);
  	wl_src->window = w_dst;
  	TAILQ_INSERT_TAIL(&w_dst->winlinks, wl_src, wentry);
  
  	if (args_has(args, 'd')) {
  		session_select(dst, wl_dst->idx);
  		if (src != dst)
  			session_select(src, wl_src->idx);
  	}
  	session_group_synchronize_from(src);
  	server_redraw_session_group(src);
  	if (src != dst) {
  		session_group_synchronize_from(dst);
  		server_redraw_session_group(dst);
  	}
  	recalculate_sizes();
  
  	return (CMD_RETURN_NORMAL);
  }
  