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use crate::util::color::ColorChoice;
use std::{
fmt::{self, Display, Formatter},
io::{self, Write},
};
#[derive(Copy, Clone, Debug, PartialEq, Eq)]
pub(crate) enum Stream {
Stdout,
Stderr,
}
#[derive(Clone, Debug)]
pub(crate) struct Colorizer {
stream: Stream,
#[allow(unused)]
color_when: ColorChoice,
pieces: Vec<(String, Style)>,
}
impl Colorizer {
#[inline(never)]
pub(crate) fn new(stream: Stream, color_when: ColorChoice) -> Self {
Colorizer {
stream,
color_when,
pieces: vec![],
}
}
#[inline(never)]
pub(crate) fn good(&mut self, msg: impl Into<String>) {
self.pieces.push((msg.into(), Style::Good));
}
#[inline(never)]
pub(crate) fn warning(&mut self, msg: impl Into<String>) {
self.pieces.push((msg.into(), Style::Warning));
}
#[inline(never)]
pub(crate) fn error(&mut self, msg: impl Into<String>) {
self.pieces.push((msg.into(), Style::Error));
}
#[inline(never)]
#[allow(dead_code)]
pub(crate) fn hint(&mut self, msg: impl Into<String>) {
self.pieces.push((msg.into(), Style::Hint));
}
#[inline(never)]
pub(crate) fn none(&mut self, msg: impl Into<String>) {
self.pieces.push((msg.into(), Style::Default));
}
}
/// Printing methods.
impl Colorizer {
#[cfg(feature = "color")]
pub(crate) fn print(&self) -> io::Result<()> {
use termcolor::{BufferWriter, ColorChoice as DepColorChoice, ColorSpec, WriteColor};
let color_when = match self.color_when {
ColorChoice::Always => DepColorChoice::Always,
ColorChoice::Auto if is_a_tty(self.stream) => DepColorChoice::Auto,
_ => DepColorChoice::Never,
};
let writer = match self.stream {
Stream::Stderr => BufferWriter::stderr(color_when),
Stream::Stdout => BufferWriter::stdout(color_when),
};
let mut buffer = writer.buffer();
for piece in &self.pieces {
let mut color = ColorSpec::new();
match piece.1 {
Style::Good => {
color.set_fg(Some(termcolor::Color::Green));
}
Style::Warning => {
color.set_fg(Some(termcolor::Color::Yellow));
}
Style::Error => {
color.set_fg(Some(termcolor::Color::Red));
color.set_bold(true);
}
Style::Hint => {
color.set_dimmed(true);
}
Style::Default => {}
}
buffer.set_color(&color)?;
buffer.write_all(piece.0.as_bytes())?;
buffer.reset()?;
}
writer.print(&buffer)
}
#[cfg(not(feature = "color"))]
pub(crate) fn print(&self) -> io::Result<()> {
// [e]println can't be used here because it panics
// if something went wrong. We don't want that.
match self.stream {
Stream::Stdout => {
let stdout = std::io::stdout();
let mut stdout = stdout.lock();
write!(stdout, "{}", self)
}
Stream::Stderr => {
let stderr = std::io::stderr();
let mut stderr = stderr.lock();
write!(stderr, "{}", self)
}
}
}
}
/// Color-unaware printing. Never uses coloring.
impl Display for Colorizer {
fn fmt(&self, f: &mut Formatter) -> fmt::Result {
for piece in &self.pieces {
Display::fmt(&piece.0, f)?;
}
Ok(())
}
}
#[derive(Copy, Clone, Debug, PartialEq, Eq)]
pub enum Style {
Good,
Warning,
Error,
Hint,
Default,
}
impl Default for Style {
fn default() -> Self {
Self::Default
}
}
#[cfg(feature = "color")]
fn is_a_tty(stream: Stream) -> bool {
let stream = match stream {
Stream::Stdout => atty::Stream::Stdout,
Stream::Stderr => atty::Stream::Stderr,
};
atty::is(stream)
}
|
