/* $OpenBSD$ */

/*
* Copyright (c) 2018 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 "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);
}