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;;; Module for terminal (ANSI) escape codes.
(define-module (terminal escape)
#:use-module (srfi srfi-60)
#:use-module (terminal termios)
#:export (with-vulgar))
(define-public (cls)
(display "\x1b[H") ; Move cursor to the origin
(display "\x1b[J") ; Clear everything after cursor
)
;;; I don't curse, I'm just vulgar.
(define-syntax with-vulgar
(syntax-rules ()
((_ thunk)
(let ((ifd (fileno (current-input-port)))
(ofd (fileno (current-output-port))))
(dynamic-wind
(lambda ()
(let ((bits (bitwise-ior ECHO ICANON)))
(c-lflags-disable! ifd bits)
(c-lflags-disable! ofd bits)))
thunk
(lambda ()
(c-lflag-restore! ifd)
(c-lflag-restore! ofd)))) )))
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