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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)))