/* $OpenBSD$ */

/*
* Copyright (c) 2007 Nicholas Marriott <[email protected]>
*
* 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);
}