/* $OpenBSD: cmd-resize-window.c,v 1.10 2023/06/30 13:19:32 nicm Exp $ */

/*
 * Copyright (c) 2018 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"

/*
 * Increase or decrease window size.
 */

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

const struct cmd_entry cmd_resize_window_entry = {
        .name = "resize-window",
        .alias = "resizew",

        .args = { "aADLRt:Ux:y:", 0, 1, NULL },
        .usage = "[-aADLRU] [-x width] [-y height] " CMD_TARGET_WINDOW_USAGE " "
                 "[adjustment]",

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

        .flags = CMD_AFTERHOOK,
        .exec = cmd_resize_window_exec
};

static enum cmd_retval
cmd_resize_window_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 session          *s = target->s;
        const char              *errstr;
        char                    *cause;
        u_int                    adjust, sx, sy, xpixel = 0, ypixel = 0;

        if (args_count(args) == 0)
                adjust = 1;
        else {
                adjust = strtonum(args_string(args, 0), 1, INT_MAX, &errstr);
                if (errstr != NULL) {
                        cmdq_error(item, "adjustment %s", errstr);
                        return (CMD_RETURN_ERROR);
                }
        }

        sx = w->sx;
        sy = w->sy;

        if (args_has(args, 'x')) {
                sx = args_strtonum(args, 'x', WINDOW_MINIMUM, WINDOW_MAXIMUM,
                    &cause);
                if (cause != NULL) {
                        cmdq_error(item, "width %s", cause);
                        free(cause);
                        return (CMD_RETURN_ERROR);
                }
        }
        if (args_has(args, 'y')) {
                sy = args_strtonum(args, 'y', WINDOW_MINIMUM, WINDOW_MAXIMUM,
                    &cause);
                if (cause != NULL) {
                        cmdq_error(item, "height %s", cause);
                        free(cause);
                        return (CMD_RETURN_ERROR);
                }
        }

        if (args_has(args, 'L')) {
                if (sx >= adjust)
                        sx -= adjust;
        } else if (args_has(args, 'R'))
                sx += adjust;
        else if (args_has(args, 'U')) {
                if (sy >= adjust)
                        sy -= adjust;
        } else if (args_has(args, 'D'))
                sy += adjust;

        if (args_has(args, 'A')) {
                default_window_size(NULL, s, w, &sx, &sy, &xpixel, &ypixel,
                    WINDOW_SIZE_LARGEST);
        } else if (args_has(args, 'a')) {
                default_window_size(NULL, s, w, &sx, &sy, &xpixel, &ypixel,
                    WINDOW_SIZE_SMALLEST);
        }

        options_set_number(w->options, "window-size", WINDOW_SIZE_MANUAL);
        w->manual_sx = sx;
        w->manual_sy = sy;
        recalculate_size(w, 1);

        return (CMD_RETURN_NORMAL);
}