/* $OpenBSD$ */

/*
* Copyright (c) 2009 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 two panes.
*/

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

const struct cmd_entry cmd_swap_pane_entry = {
       .name = "swap-pane",
       .alias = "swapp",

       .args = { "dDs:t:UZ", 0, 0, NULL },
       .usage = "[-dDUZ] " CMD_SRCDST_PANE_USAGE,

       .source = { 's', CMD_FIND_PANE, CMD_FIND_DEFAULT_MARKED },
       .target = { 't', CMD_FIND_PANE, 0 },

       .flags = 0,
       .exec = cmd_swap_pane_exec
};

static enum cmd_retval
cmd_swap_pane_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 window           *src_w, *dst_w;
       struct window_pane      *tmp_wp, *src_wp, *dst_wp;
       struct layout_cell      *src_lc, *dst_lc;
       u_int                    sx, sy, xoff, yoff;

       dst_w = target->wl->window;
       dst_wp = target->wp;
       src_w = source->wl->window;
       src_wp = source->wp;

       if (window_push_zoom(dst_w, 0, args_has(args, 'Z')))
               server_redraw_window(dst_w);

       if (args_has(args, 'D')) {
               src_w = dst_w;
               src_wp = TAILQ_NEXT(dst_wp, entry);
               if (src_wp == NULL)
                       src_wp = TAILQ_FIRST(&dst_w->panes);
       } else if (args_has(args, 'U')) {
               src_w = dst_w;
               src_wp = TAILQ_PREV(dst_wp, window_panes, entry);
               if (src_wp == NULL)
                       src_wp = TAILQ_LAST(&dst_w->panes, window_panes);
       }

       if (src_w != dst_w && window_push_zoom(src_w, 0, args_has(args, 'Z')))
               server_redraw_window(src_w);

       if (src_wp == dst_wp)
               goto out;

       server_client_remove_pane(src_wp);
       server_client_remove_pane(dst_wp);

       tmp_wp = TAILQ_PREV(dst_wp, window_panes, entry);
       TAILQ_REMOVE(&dst_w->panes, dst_wp, entry);
       TAILQ_REPLACE(&src_w->panes, src_wp, dst_wp, entry);
       if (tmp_wp == src_wp)
               tmp_wp = dst_wp;
       if (tmp_wp == NULL)
               TAILQ_INSERT_HEAD(&dst_w->panes, src_wp, entry);
       else
               TAILQ_INSERT_AFTER(&dst_w->panes, tmp_wp, src_wp, entry);

       src_lc = src_wp->layout_cell;
       dst_lc = dst_wp->layout_cell;
       src_lc->wp = dst_wp;
       dst_wp->layout_cell = src_lc;
       dst_lc->wp = src_wp;
       src_wp->layout_cell = dst_lc;

       src_wp->window = dst_w;
       options_set_parent(src_wp->options, dst_w->options);
       src_wp->flags |= PANE_STYLECHANGED;
       dst_wp->window = src_w;
       options_set_parent(dst_wp->options, src_w->options);
       dst_wp->flags |= PANE_STYLECHANGED;

       sx = src_wp->sx; sy = src_wp->sy;
       xoff = src_wp->xoff; yoff = src_wp->yoff;
       src_wp->xoff = dst_wp->xoff; src_wp->yoff = dst_wp->yoff;
       window_pane_resize(src_wp, dst_wp->sx, dst_wp->sy);
       dst_wp->xoff = xoff; dst_wp->yoff = yoff;
       window_pane_resize(dst_wp, sx, sy);

       if (!args_has(args, 'd')) {
               if (src_w != dst_w) {
                       window_set_active_pane(src_w, dst_wp, 1);
                       window_set_active_pane(dst_w, src_wp, 1);
               } else {
                       tmp_wp = dst_wp;
                       window_set_active_pane(src_w, tmp_wp, 1);
               }
       } else {
               if (src_w->active == src_wp)
                       window_set_active_pane(src_w, dst_wp, 1);
               if (dst_w->active == dst_wp)
                       window_set_active_pane(dst_w, src_wp, 1);
       }
       if (src_w != dst_w) {
               window_pane_stack_remove(&src_w->last_panes, src_wp);
               window_pane_stack_remove(&dst_w->last_panes, dst_wp);
               colour_palette_from_option(&src_wp->palette, src_wp->options);
               colour_palette_from_option(&dst_wp->palette, dst_wp->options);
       }
       server_redraw_window(src_w);
       server_redraw_window(dst_w);
       notify_window("window-layout-changed", src_w);
       if (src_w != dst_w)
               notify_window("window-layout-changed", dst_w);

out:
       if (window_pop_zoom(src_w))
               server_redraw_window(src_w);
       if (src_w != dst_w && window_pop_zoom(dst_w))
               server_redraw_window(dst_w);
       return (CMD_RETURN_NORMAL);
}

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