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|
use crate::adapter::WinconBytes;
use crate::stream::AsLockedWrite;
use crate::stream::RawStream;
/// Only pass printable data to the inner `Write`
#[cfg(feature = "wincon")] // here mostly for documentation purposes
#[derive(Debug)]
pub struct WinconStream<S>
where
S: RawStream,
{
raw: S,
// `WinconBytes` is especially large compared to other variants of `AutoStream`, so boxing it
// here so `AutoStream` doesn't have to discard one allocation and create another one when
// calling `AutoStream::lock`
state: Box<WinconBytes>,
}
impl<S> WinconStream<S>
where
S: RawStream,
{
/// Only pass printable data to the inner `Write`
#[inline]
pub fn new(raw: S) -> Self {
Self {
raw,
state: Default::default(),
}
}
/// Get the wrapped [`RawStream`]
#[inline]
pub fn into_inner(self) -> S {
self.raw
}
#[inline]
pub fn is_terminal(&self) -> bool {
self.raw.is_terminal()
}
}
impl WinconStream<std::io::Stdout> {
/// Get exclusive access to the `WinconStream`
///
/// Why?
/// - Faster performance when writing in a loop
/// - Avoid other threads interleaving output with the current thread
#[inline]
pub fn lock(self) -> WinconStream<std::io::StdoutLock<'static>> {
WinconStream {
raw: self.raw.lock(),
state: self.state,
}
}
}
impl WinconStream<std::io::Stderr> {
/// Get exclusive access to the `WinconStream`
///
/// Why?
/// - Faster performance when writing in a loop
/// - Avoid other threads interleaving output with the current thread
#[inline]
pub fn lock(self) -> WinconStream<std::io::StderrLock<'static>> {
WinconStream {
raw: self.raw.lock(),
state: self.state,
}
}
}
impl<S> std::io::Write for WinconStream<S>
where
S: RawStream + AsLockedWrite,
{
// Must forward all calls to ensure locking happens appropriately
#[inline]
fn write(&mut self, buf: &[u8]) -> std::io::Result<usize> {
write(&mut self.raw.as_locked_write(), &mut self.state, buf)
}
#[inline]
fn write_vectored(&mut self, bufs: &[std::io::IoSlice<'_>]) -> std::io::Result<usize> {
let buf = bufs
.iter()
.find(|b| !b.is_empty())
.map(|b| &**b)
.unwrap_or(&[][..]);
self.write(buf)
}
// is_write_vectored: nightly only
#[inline]
fn flush(&mut self) -> std::io::Result<()> {
self.raw.as_locked_write().flush()
}
#[inline]
fn write_all(&mut self, buf: &[u8]) -> std::io::Result<()> {
write_all(&mut self.raw.as_locked_write(), &mut self.state, buf)
}
// write_all_vectored: nightly only
#[inline]
fn write_fmt(&mut self, args: std::fmt::Arguments<'_>) -> std::io::Result<()> {
write_fmt(&mut self.raw.as_locked_write(), &mut self.state, args)
}
}
fn write(raw: &mut dyn RawStream, state: &mut WinconBytes, buf: &[u8]) -> std::io::Result<usize> {
for (style, printable) in state.extract_next(buf) {
let fg = style.get_fg_color().and_then(cap_wincon_color);
let bg = style.get_bg_color().and_then(cap_wincon_color);
let written = raw.write_colored(fg, bg, printable.as_bytes())?;
let possible = printable.len();
if possible != written {
// HACK: Unsupported atm
break;
}
}
Ok(buf.len())
}
fn write_all(raw: &mut dyn RawStream, state: &mut WinconBytes, buf: &[u8]) -> std::io::Result<()> {
for (style, printable) in state.extract_next(buf) {
let mut buf = printable.as_bytes();
let fg = style.get_fg_color().and_then(cap_wincon_color);
let bg = style.get_bg_color().and_then(cap_wincon_color);
while !buf.is_empty() {
match raw.write_colored(fg, bg, buf) {
Ok(0) => {
return Err(std::io::Error::new(
std::io::ErrorKind::WriteZero,
"failed to write whole buffer",
));
}
Ok(n) => buf = &buf[n..],
Err(ref e) if e.kind() == std::io::ErrorKind::Interrupted => {}
Err(e) => return Err(e),
}
}
}
Ok(())
}
fn write_fmt(
raw: &mut dyn RawStream,
state: &mut WinconBytes,
args: std::fmt::Arguments<'_>,
) -> std::io::Result<()> {
let write_all = |buf: &[u8]| write_all(raw, state, buf);
crate::fmt::Adapter::new(write_all).write_fmt(args)
}
fn cap_wincon_color(color: anstyle::Color) -> Option<anstyle::AnsiColor> {
match color {
anstyle::Color::Ansi(c) => Some(c),
anstyle::Color::Ansi256(c) => c.into_ansi(),
anstyle::Color::Rgb(_) => None,
}
}
#[cfg(test)]
mod test {
use super::*;
use proptest::prelude::*;
use std::io::Write as _;
proptest! {
#[test]
#[cfg_attr(miri, ignore)] // See https://github.com/AltSysrq/proptest/issues/253
fn write_all_no_escapes(s in "\\PC*") {
let buffer = Vec::new();
let mut stream = WinconStream::new(buffer);
stream.write_all(s.as_bytes()).unwrap();
let buffer = stream.into_inner();
let actual = std::str::from_utf8(buffer.as_ref()).unwrap();
assert_eq!(s, actual);
}
#[test]
#[cfg_attr(miri, ignore)] // See https://github.com/AltSysrq/proptest/issues/253
fn write_byte_no_escapes(s in "\\PC*") {
let buffer = Vec::new();
let mut stream = WinconStream::new(buffer);
for byte in s.as_bytes() {
stream.write_all(&[*byte]).unwrap();
}
let buffer = stream.into_inner();
let actual = std::str::from_utf8(buffer.as_ref()).unwrap();
assert_eq!(s, actual);
}
#[test]
#[cfg_attr(miri, ignore)] // See https://github.com/AltSysrq/proptest/issues/253
fn write_all_random(s in any::<Vec<u8>>()) {
let buffer = Vec::new();
let mut stream = WinconStream::new(buffer);
stream.write_all(s.as_slice()).unwrap();
}
#[test]
#[cfg_attr(miri, ignore)] // See https://github.com/AltSysrq/proptest/issues/253
fn write_byte_random(s in any::<Vec<u8>>()) {
let buffer = Vec::new();
let mut stream = WinconStream::new(buffer);
for byte in s.as_slice() {
stream.write_all(&[*byte]).unwrap();
}
}
}
}
|
