/* $OpenBSD: cmd-select-layout.c,v 1.42 2026/04/04 16:40:27 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"

/*
 * Switch window to selected layout.
 */

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

const struct cmd_entry cmd_select_layout_entry = {
        .name = "select-layout",
        .alias = "selectl",

        .args = { "Enopt:", 0, 1, NULL },
        .usage = "[-Enop] " CMD_TARGET_PANE_USAGE " [layout-name]",

        .target = { 't', CMD_FIND_PANE, 0 },

        .flags = CMD_AFTERHOOK,
        .exec = cmd_select_layout_exec
};

const struct cmd_entry cmd_next_layout_entry = {
        .name = "next-layout",
        .alias = "nextl",

        .args = { "t:", 0, 0, NULL },
        .usage = CMD_TARGET_WINDOW_USAGE,

        .target = { 't', CMD_FIND_WINDOW, 0 },

        .flags = CMD_AFTERHOOK,
        .exec = cmd_select_layout_exec
};

const struct cmd_entry cmd_previous_layout_entry = {
        .name = "previous-layout",
        .alias = "prevl",

        .args = { "t:", 0, 0, NULL },
        .usage = CMD_TARGET_WINDOW_USAGE,

        .target = { 't', CMD_FIND_WINDOW, 0 },

        .flags = CMD_AFTERHOOK,
        .exec = cmd_select_layout_exec
};

static enum cmd_retval
cmd_select_layout_exec(struct cmd *self, struct cmdq_item *item)
{
        struct args             *args = cmd_get_args(self);
        struct cmd_find_state   *target = cmdq_get_target(item);
        struct winlink          *wl = target->wl;
        struct window           *w = wl->window;
        struct window_pane      *wp = target->wp;
        const char              *layoutname;
        char                    *oldlayout, *cause;
        int                      next, previous, layout;

        server_unzoom_window(w);

        next = (cmd_get_entry(self) == &cmd_next_layout_entry);
        if (args_has(args, 'n'))
                next = 1;
        previous = (cmd_get_entry(self) == &cmd_previous_layout_entry);
        if (args_has(args, 'p'))
                previous = 1;

        oldlayout = w->old_layout;
        w->old_layout = layout_dump(w, w->layout_root);

        if (next || previous) {
                if (next)
                        layout_set_next(w);
                else
                        layout_set_previous(w);
                goto changed;
        }

        if (args_has(args, 'E')) {
                layout_spread_out(wp);
                goto changed;
        }

        if (args_count(args) != 0)
                layoutname = args_string(args, 0);
        else if (args_has(args, 'o'))
                layoutname = oldlayout;
        else
                layoutname = NULL;

        if (!args_has(args, 'o')) {
                if (layoutname == NULL)
                        layout = w->lastlayout;
                else
                        layout = layout_set_lookup(layoutname);
                if (layout != -1) {
                        layout_set_select(w, layout);
                        goto changed;
                }
        }

        if (layoutname != NULL) {
                if (layout_parse(w, layoutname, &cause) == -1) {
                        cmdq_error(item, "%s: %s", cause, layoutname);
                        free(cause);
                        goto error;
                }
                goto changed;
        }

        free(oldlayout);
        return (CMD_RETURN_NORMAL);

changed:
        free(oldlayout);
        recalculate_sizes();
        server_redraw_window(w);
        notify_window("window-layout-changed", w);
        return (CMD_RETURN_NORMAL);

error:
        free(w->old_layout);
        w->old_layout = oldlayout;
        return (CMD_RETURN_ERROR);
}