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|
(**************************************************************************)
(* *)
(* OCaml *)
(* *)
(* Xavier Leroy, projet Gallium, INRIA Paris *)
(* *)
(* Copyright 2017 Institut National de Recherche en Informatique et *)
(* en Automatique. *)
(* *)
(* All rights reserved. This file is distributed under the terms of *)
(* the GNU Lesser General Public License version 2.1, with the *)
(* special exception on linking described in the file LICENSE. *)
(* *)
(**************************************************************************)
open Printf
external isatty : out_channel -> bool = "caml_sys_isatty"
external terminfo_rows: out_channel -> int = "caml_terminfo_rows"
type status =
| Uninitialised
| Bad_term
| Good_term
let setup oc =
let term = try Sys.getenv "TERM" with Not_found -> "" in
(* Same heuristics as in Misc.Color.should_enable_color *)
if term <> "" && term <> "dumb" && isatty oc
then Good_term
else Bad_term
let num_lines oc =
let rows = terminfo_rows oc in
if rows > 0 then rows else 24
(* 24 is a reasonable default for an ANSI-style terminal *)
let backup oc n =
if n >= 1 then fprintf oc "\027[%dA%!" n
let resume oc n =
if n >= 1 then fprintf oc "\027[%dB%!" n
let standout oc b =
output_string oc (if b then "\027[4m" else "\027[0m"); flush oc
|
