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