/* $OpenBSD: cmd-break-pane.c,v 1.63 2025/09/01 07:53:49 nicm Exp $ */

/*
 * 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 <stdlib.h>

#include "tmux.h"

/*
 * Break pane off into a window.
 */

#define BREAK_PANE_TEMPLATE "#{session_name}:#{window_index}.#{pane_index}"

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

const struct cmd_entry cmd_break_pane_entry = {
        .name = "break-pane",
        .alias = "breakp",

        .args = { "abdPF:n:s:t:", 0, 0, NULL },
        .usage = "[-abdP] [-F format] [-n window-name] [-s src-pane] "
                 "[-t dst-window]",

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

        .flags = 0,
        .exec = cmd_break_pane_exec
};

static enum cmd_retval
cmd_break_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 client           *tc = cmdq_get_target_client(item);
        struct winlink          *wl = source->wl;
        struct session          *src_s = source->s;
        struct session          *dst_s = target->s;
        struct window_pane      *wp = source->wp;
        struct window           *w = wl->window;
        char                    *name, *cause, *cp;
        int                      idx = target->idx, before;
        const char              *template;

        before = args_has(args, 'b');
        if (args_has(args, 'a') || before) {
                if (target->wl != NULL)
                        idx = winlink_shuffle_up(dst_s, target->wl, before);
                else
                        idx = winlink_shuffle_up(dst_s, dst_s->curw, before);
                if (idx == -1)
                        return (CMD_RETURN_ERROR);
        }
        server_unzoom_window(w);

        if (window_count_panes(w) == 1) {
                if (server_link_window(src_s, wl, dst_s, idx, 0,
                    !args_has(args, 'd'), &cause) != 0) {
                        cmdq_error(item, "%s", cause);
                        free(cause);
                        return (CMD_RETURN_ERROR);
                }
                if (args_has(args, 'n')) {
                        window_set_name(w, args_get(args, 'n'));
                        options_set_number(w->options, "automatic-rename", 0);
                }
                server_unlink_window(src_s, wl);
                wl = winlink_find_by_window(&dst_s->windows, w);
                if (wl == NULL)
                        return (CMD_RETURN_ERROR);
                goto out;
        }
        if (idx != -1 && winlink_find_by_index(&dst_s->windows, idx) != NULL) {
                cmdq_error(item, "index in use: %d", idx);
                return (CMD_RETURN_ERROR);
        }

        TAILQ_REMOVE(&w->panes, wp, entry);
        server_client_remove_pane(wp);
        window_lost_pane(w, wp);
        layout_close_pane(wp);

        w = wp->window = window_create(w->sx, w->sy, w->xpixel, w->ypixel);
        options_set_parent(wp->options, w->options);
        wp->flags |= (PANE_STYLECHANGED|PANE_THEMECHANGED);
        TAILQ_INSERT_HEAD(&w->panes, wp, entry);
        w->active = wp;
        w->latest = tc;

        if (!args_has(args, 'n')) {
                name = default_window_name(w);
                window_set_name(w, name);
                free(name);
        } else {
                window_set_name(w, args_get(args, 'n'));
                options_set_number(w->options, "automatic-rename", 0);
        }

        layout_init(w, wp);
        wp->flags |= PANE_CHANGED;
        colour_palette_from_option(&wp->palette, wp->options);

        if (idx == -1)
                idx = -1 - options_get_number(dst_s->options, "base-index");
        wl = session_attach(dst_s, w, idx, &cause); /* can't fail */
        if (!args_has(args, 'd')) {
                session_select(dst_s, wl->idx);
                cmd_find_from_session(current, dst_s, 0);
        }

        server_redraw_session(src_s);
        if (src_s != dst_s)
                server_redraw_session(dst_s);
        server_status_session_group(src_s);
        if (src_s != dst_s)
                server_status_session_group(dst_s);

out:
        if (args_has(args, 'P')) {
                if ((template = args_get(args, 'F')) == NULL)
                        template = BREAK_PANE_TEMPLATE;
                cp = format_single(item, template, tc, dst_s, wl, wp);
                cmdq_print(item, "%s", cp);
                free(cp);
        }
        return (CMD_RETURN_NORMAL);
}