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127 lines
3.4 KiB
Rust
127 lines
3.4 KiB
Rust
// Copyright 2018-2021 the Deno authors. All rights reserved. MIT license.
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use regex::Regex;
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use std::env;
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use std::fmt;
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use std::io::Write;
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use termcolor::Color::{Ansi256, Black, Blue, Cyan, Green, Red, White, Yellow};
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use termcolor::{Ansi, ColorSpec, WriteColor};
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#[cfg(windows)]
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use termcolor::{BufferWriter, ColorChoice};
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lazy_static::lazy_static! {
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// STRIP_ANSI_RE and strip_ansi_codes are lifted from the "console" crate.
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// Copyright 2017 Armin Ronacher <armin.ronacher@active-4.com>. MIT License.
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static ref STRIP_ANSI_RE: Regex = Regex::new(
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r"[\x1b\x9b][\[()#;?]*(?:[0-9]{1,4}(?:;[0-9]{0,4})*)?[0-9A-PRZcf-nqry=><]"
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).unwrap();
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static ref NO_COLOR: bool = env::var_os("NO_COLOR").is_some();
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}
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/// Helper function to strip ansi codes.
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#[cfg(test)]
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pub fn strip_ansi_codes(s: &str) -> std::borrow::Cow<str> {
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STRIP_ANSI_RE.replace_all(s, "")
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}
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pub fn use_color() -> bool {
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!(*NO_COLOR)
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}
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#[cfg(windows)]
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pub fn enable_ansi() {
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BufferWriter::stdout(ColorChoice::AlwaysAnsi);
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}
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fn style(s: &str, colorspec: ColorSpec) -> impl fmt::Display {
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if !use_color() {
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return String::from(s);
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}
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let mut v = Vec::new();
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let mut ansi_writer = Ansi::new(&mut v);
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ansi_writer.set_color(&colorspec).unwrap();
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ansi_writer.write_all(s.as_bytes()).unwrap();
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ansi_writer.reset().unwrap();
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String::from_utf8_lossy(&v).into_owned()
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}
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pub fn red_bold(s: &str) -> impl fmt::Display {
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let mut style_spec = ColorSpec::new();
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style_spec.set_fg(Some(Red)).set_bold(true);
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style(&s, style_spec)
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}
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pub fn green_bold(s: &str) -> impl fmt::Display {
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let mut style_spec = ColorSpec::new();
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style_spec.set_fg(Some(Green)).set_bold(true);
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style(&s, style_spec)
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}
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pub fn italic_bold(s: &str) -> impl fmt::Display {
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let mut style_spec = ColorSpec::new();
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style_spec.set_bold(true).set_italic(true);
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style(&s, style_spec)
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}
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pub fn white_on_red(s: &str) -> impl fmt::Display {
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let mut style_spec = ColorSpec::new();
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style_spec.set_bg(Some(Red)).set_fg(Some(White));
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style(&s, style_spec)
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}
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pub fn black_on_green(s: &str) -> impl fmt::Display {
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let mut style_spec = ColorSpec::new();
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style_spec.set_bg(Some(Green)).set_fg(Some(Black));
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style(&s, style_spec)
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}
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pub fn yellow(s: &str) -> impl fmt::Display {
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let mut style_spec = ColorSpec::new();
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style_spec.set_fg(Some(Yellow));
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style(&s, style_spec)
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}
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pub fn cyan(s: &str) -> impl fmt::Display {
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let mut style_spec = ColorSpec::new();
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style_spec.set_fg(Some(Cyan));
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style(&s, style_spec)
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}
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pub fn red(s: &str) -> impl fmt::Display {
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let mut style_spec = ColorSpec::new();
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style_spec.set_fg(Some(Red));
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style(&s, style_spec)
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}
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pub fn green(s: &str) -> impl fmt::Display {
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let mut style_spec = ColorSpec::new();
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style_spec.set_fg(Some(Green));
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style(&s, style_spec)
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}
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pub fn bold(s: &str) -> impl fmt::Display {
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let mut style_spec = ColorSpec::new();
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style_spec.set_bold(true);
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style(&s, style_spec)
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}
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pub fn gray(s: &str) -> impl fmt::Display {
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let mut style_spec = ColorSpec::new();
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style_spec.set_fg(Some(Ansi256(8)));
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style(&s, style_spec)
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}
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pub fn italic_bold_gray(s: &str) -> impl fmt::Display {
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let mut style_spec = ColorSpec::new();
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style_spec
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.set_fg(Some(Ansi256(8)))
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.set_bold(true)
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.set_italic(true);
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style(&s, style_spec)
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}
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pub fn intense_blue(s: &str) -> impl fmt::Display {
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let mut style_spec = ColorSpec::new();
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style_spec.set_fg(Some(Blue)).set_intense(true);
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style(&s, style_spec)
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}
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