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;;; GNU Guix --- Functional package management for GNU
;;; Copyright © 2018 Mathieu Othacehe <m.othacehe@gmail.com>
;;;
;;; This file is part of GNU Guix.
;;;
;;; GNU Guix is free software; you can redistribute it and/or modify it
;;; under the terms of the GNU General Public License as published by
;;; the Free Software Foundation; either version 3 of the License, or (at
;;; your option) any later version.
;;;
;;; GNU Guix is distributed in the hope that it will be useful, but
;;; WITHOUT ANY WARRANTY; without even the implied warranty of
;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
;;; GNU General Public License for more details.
;;;
;;; You should have received a copy of the GNU General Public License
;;; along with GNU Guix. If not, see <http://www.gnu.org/licenses/>.
(define-module (gnu installer newt utils)
#:use-module (ice-9 receive)
#:use-module (newt)
#:export (screen-columns
screen-rows
destroy-form-and-pop
set-screen-size!))
;; Number of columns and rows of the terminal.
(define screen-columns (make-parameter 0))
(define screen-rows (make-parameter 0))
(define (destroy-form-and-pop form)
"Destory the given FORM and pop the current window."
(destroy-form form)
(pop-window))
(define (set-screen-size!)
"Set the parameters 'screen-columns' and 'screen-rows' to the number of
columns and rows respectively of the current terminal."
(receive (columns rows)
(screen-size)
(screen-columns columns)
(screen-rows rows)))
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