/* $OpenBSD$ */

/*
* Copyright (c) 2011 George Nachman <[email protected]>
* 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 <string.h>
#include <unistd.h>

#include "tmux.h"

/*
* Join or move a pane into another (like split/swap/kill).
*/

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

const struct cmd_entry cmd_join_pane_entry = {
       .name = "join-pane",
       .alias = "joinp",

       .args = { "bdfhvp:l:s:t:", 0, 0, NULL },
       .usage = "[-bdfhv] [-l size] " CMD_SRCDST_PANE_USAGE,

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

       .flags = 0,
       .exec = cmd_join_pane_exec
};

const struct cmd_entry cmd_move_pane_entry = {
       .name = "move-pane",
       .alias = "movep",

       .args = { "bdfhvp:l:s:t:", 0, 0, NULL },
       .usage = "[-bdfhv] [-l size] " CMD_SRCDST_PANE_USAGE,

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

       .flags = 0,
       .exec = cmd_join_pane_exec
};

static enum cmd_retval
cmd_join_pane_exec(struct cmd *self, struct cmdq_item *item)
{
       struct args             *args = cmd_get_args(self);
       struct cmd_find_state   *current = cmdq_get_current(item);
       struct cmd_find_state   *target = cmdq_get_target(item);
       struct cmd_find_state   *source = cmdq_get_source(item);
       struct session          *dst_s;
       struct winlink          *src_wl, *dst_wl;
       struct window           *src_w, *dst_w;
       struct window_pane      *src_wp, *dst_wp;
       char                    *cause = NULL;
       int                      size, dst_idx;
       int                      flags;
       enum layout_type         type;
       struct layout_cell      *lc;
       u_int                    curval = 0;

       dst_s = target->s;
       dst_wl = target->wl;
       dst_wp = target->wp;
       dst_w = dst_wl->window;
       dst_idx = dst_wl->idx;
       server_unzoom_window(dst_w);

       src_wl = source->wl;
       src_wp = source->wp;
       src_w = src_wl->window;
       server_unzoom_window(src_w);

       if (src_wp == dst_wp) {
               cmdq_error(item, "source and target panes must be different");
               return (CMD_RETURN_ERROR);
       }

       type = LAYOUT_TOPBOTTOM;
       if (args_has(args, 'h'))
               type = LAYOUT_LEFTRIGHT;

       /* If the 'p' flag is dropped then this bit can be moved into 'l'. */
       if (args_has(args, 'l') || args_has(args, 'p')) {
               if (args_has(args, 'f')) {
                       if (type == LAYOUT_TOPBOTTOM)
                               curval = dst_w->sy;
                       else
                               curval = dst_w->sx;
               } else {
                       if (type == LAYOUT_TOPBOTTOM)
                               curval = dst_wp->sy;
                       else
                               curval = dst_wp->sx;
               }
       }

       size = -1;
       if (args_has(args, 'l')) {
               size = args_percentage_and_expand(args, 'l', 0, INT_MAX, curval,
                          item, &cause);
       } else if (args_has(args, 'p')) {
               size = args_strtonum_and_expand(args, 'l', 0, 100, item,
                          &cause);
               if (cause == NULL)
                       size = curval * size / 100;
       }
       if (cause != NULL) {
               cmdq_error(item, "size %s", cause);
               free(cause);
               return (CMD_RETURN_ERROR);
       }

       flags = 0;
       if (args_has(args, 'b'))
               flags |= SPAWN_BEFORE;
       if (args_has(args, 'f'))
               flags |= SPAWN_FULLSIZE;

       lc = layout_split_pane(dst_wp, type, size, flags);
       if (lc == NULL) {
               cmdq_error(item, "create pane failed: pane too small");
               return (CMD_RETURN_ERROR);
       }

       layout_close_pane(src_wp);

       server_client_remove_pane(src_wp);
       window_lost_pane(src_w, src_wp);
       TAILQ_REMOVE(&src_w->panes, src_wp, entry);

       src_wp->window = dst_w;
       options_set_parent(src_wp->options, dst_w->options);
       src_wp->flags |= PANE_STYLECHANGED;
       if (flags & SPAWN_BEFORE)
               TAILQ_INSERT_BEFORE(dst_wp, src_wp, entry);
       else
               TAILQ_INSERT_AFTER(&dst_w->panes, dst_wp, src_wp, entry);
       layout_assign_pane(lc, src_wp, 0);
       colour_palette_from_option(&src_wp->palette, src_wp->options);

       recalculate_sizes();

       server_redraw_window(src_w);
       server_redraw_window(dst_w);

       if (!args_has(args, 'd')) {
               window_set_active_pane(dst_w, src_wp, 1);
               session_select(dst_s, dst_idx);
               cmd_find_from_session(current, dst_s, 0);
               server_redraw_session(dst_s);
       } else
               server_status_session(dst_s);

       if (window_count_panes(src_w) == 0)
               server_kill_window(src_w, 1);
       else
               notify_window("window-layout-changed", src_w);
       notify_window("window-layout-changed", dst_w);

       return (CMD_RETURN_NORMAL);
}

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