/* $OpenBSD: cmd-join-pane.c,v 1.52 2025/03/04 08:45:04 nicm Exp $ */

/*
 * Copyright (c) 2011 George Nachman <tmux@georgester.com>
 * Copyright (c) 2009 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 <paths.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|PANE_THEMECHANGED);
        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);
}