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-rw-r--r--vendor/anstream/src/adapter/wincon.rs320
1 files changed, 320 insertions, 0 deletions
diff --git a/vendor/anstream/src/adapter/wincon.rs b/vendor/anstream/src/adapter/wincon.rs
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+/// Incrementally convert to wincon calls for non-contiguous data
+#[derive(Default, Clone, Debug, PartialEq, Eq)]
+pub struct WinconBytes {
+ parser: anstyle_parse::Parser,
+ capture: WinconCapture,
+}
+
+impl WinconBytes {
+ /// Initial state
+ pub fn new() -> Self {
+ Default::default()
+ }
+
+ /// Strip the next segment of data
+ pub fn extract_next<'s>(&'s mut self, bytes: &'s [u8]) -> WinconBytesIter<'s> {
+ self.capture.reset();
+ self.capture.printable.reserve(bytes.len());
+ WinconBytesIter {
+ bytes,
+ parser: &mut self.parser,
+ capture: &mut self.capture,
+ }
+ }
+}
+
+/// See [`WinconBytes`]
+#[derive(Debug, PartialEq, Eq)]
+pub struct WinconBytesIter<'s> {
+ bytes: &'s [u8],
+ parser: &'s mut anstyle_parse::Parser,
+ capture: &'s mut WinconCapture,
+}
+
+impl<'s> Iterator for WinconBytesIter<'s> {
+ type Item = (anstyle::Style, String);
+
+ #[inline]
+ fn next(&mut self) -> Option<Self::Item> {
+ next_bytes(&mut self.bytes, self.parser, self.capture)
+ }
+}
+
+#[inline]
+fn next_bytes(
+ bytes: &mut &[u8],
+ parser: &mut anstyle_parse::Parser,
+ capture: &mut WinconCapture,
+) -> Option<(anstyle::Style, String)> {
+ capture.reset();
+ while capture.ready.is_none() {
+ let byte = if let Some((byte, remainder)) = (*bytes).split_first() {
+ *bytes = remainder;
+ *byte
+ } else {
+ break;
+ };
+ parser.advance(capture, byte);
+ }
+ if capture.printable.is_empty() {
+ return None;
+ }
+
+ let style = capture.ready.unwrap_or(capture.style);
+ Some((style, std::mem::take(&mut capture.printable)))
+}
+
+#[derive(Default, Clone, Debug, PartialEq, Eq)]
+struct WinconCapture {
+ style: anstyle::Style,
+ printable: String,
+ ready: Option<anstyle::Style>,
+}
+
+impl WinconCapture {
+ fn reset(&mut self) {
+ self.ready = None;
+ }
+}
+
+impl anstyle_parse::Perform for WinconCapture {
+ /// Draw a character to the screen and update states.
+ fn print(&mut self, c: char) {
+ self.printable.push(c);
+ }
+
+ /// Execute a C0 or C1 control function.
+ fn execute(&mut self, byte: u8) {
+ if byte.is_ascii_whitespace() {
+ self.printable.push(byte as char);
+ }
+ }
+
+ fn csi_dispatch(
+ &mut self,
+ params: &anstyle_parse::Params,
+ _intermediates: &[u8],
+ ignore: bool,
+ action: u8,
+ ) {
+ if ignore {
+ return;
+ }
+ if action != b'm' {
+ return;
+ }
+
+ let mut style = self.style;
+ // param/value differences are dependent on the escape code
+ let mut state = State::Normal;
+ let mut r = None;
+ let mut g = None;
+ let mut is_bg = false;
+ for param in params {
+ for value in param {
+ match (state, *value) {
+ (State::Normal, 0) => {
+ style = anstyle::Style::default();
+ break;
+ }
+ (State::Normal, 1) => {
+ style = style.bold();
+ break;
+ }
+ (State::Normal, 4) => {
+ style = style.underline();
+ break;
+ }
+ (State::Normal, 30..=37) => {
+ let color = to_ansi_color(value - 30).unwrap();
+ style = style.fg_color(Some(color.into()));
+ break;
+ }
+ (State::Normal, 38) => {
+ is_bg = false;
+ state = State::PrepareCustomColor;
+ }
+ (State::Normal, 39) => {
+ style = style.fg_color(None);
+ break;
+ }
+ (State::Normal, 40..=47) => {
+ let color = to_ansi_color(value - 40).unwrap();
+ style = style.bg_color(Some(color.into()));
+ break;
+ }
+ (State::Normal, 48) => {
+ is_bg = true;
+ state = State::PrepareCustomColor;
+ }
+ (State::Normal, 49) => {
+ style = style.bg_color(None);
+ break;
+ }
+ (State::Normal, 90..=97) => {
+ let color = to_ansi_color(value - 90).unwrap().bright(true);
+ style = style.fg_color(Some(color.into()));
+ break;
+ }
+ (State::Normal, 100..=107) => {
+ let color = to_ansi_color(value - 100).unwrap().bright(true);
+ style = style.bg_color(Some(color.into()));
+ break;
+ }
+ (State::PrepareCustomColor, 5) => {
+ state = State::Ansi256;
+ }
+ (State::PrepareCustomColor, 2) => {
+ state = State::Rgb;
+ r = None;
+ g = None;
+ }
+ (State::Ansi256, n) => {
+ let color = anstyle::Ansi256Color(n as u8);
+ if is_bg {
+ style = style.bg_color(Some(color.into()));
+ } else {
+ style = style.fg_color(Some(color.into()));
+ }
+ break;
+ }
+ (State::Rgb, b) => match (r, g) {
+ (None, _) => {
+ r = Some(b);
+ }
+ (Some(_), None) => {
+ g = Some(b);
+ }
+ (Some(r), Some(g)) => {
+ let color = anstyle::RgbColor(r as u8, g as u8, b as u8);
+ if is_bg {
+ style = style.bg_color(Some(color.into()));
+ } else {
+ style = style.fg_color(Some(color.into()));
+ }
+ break;
+ }
+ },
+ _ => {
+ break;
+ }
+ }
+ }
+ }
+
+ if style != self.style && !self.printable.is_empty() {
+ self.ready = Some(self.style);
+ }
+ self.style = style;
+ }
+}
+
+#[derive(Copy, Clone, PartialEq, Eq, Debug)]
+enum State {
+ Normal,
+ PrepareCustomColor,
+ Ansi256,
+ Rgb,
+}
+
+fn to_ansi_color(digit: u16) -> Option<anstyle::AnsiColor> {
+ match digit {
+ 0 => Some(anstyle::AnsiColor::Black),
+ 1 => Some(anstyle::AnsiColor::Red),
+ 2 => Some(anstyle::AnsiColor::Green),
+ 3 => Some(anstyle::AnsiColor::Yellow),
+ 4 => Some(anstyle::AnsiColor::Blue),
+ 5 => Some(anstyle::AnsiColor::Magenta),
+ 6 => Some(anstyle::AnsiColor::Cyan),
+ 7 => Some(anstyle::AnsiColor::White),
+ _ => None,
+ }
+}
+
+#[cfg(test)]
+mod test {
+ use super::*;
+ use owo_colors::OwoColorize as _;
+ use proptest::prelude::*;
+
+ #[track_caller]
+ fn verify(input: &str, expected: Vec<(anstyle::Style, &str)>) {
+ let expected = expected
+ .into_iter()
+ .map(|(style, value)| (style, value.to_owned()))
+ .collect::<Vec<_>>();
+ let mut state = WinconBytes::new();
+ let actual = state.extract_next(input.as_bytes()).collect::<Vec<_>>();
+ assert_eq!(expected, actual, "{input:?}");
+ }
+
+ #[test]
+ fn start() {
+ let input = format!("{} world!", "Hello".green().on_red());
+ let expected = vec![
+ (
+ anstyle::AnsiColor::Green.on(anstyle::AnsiColor::Red),
+ "Hello",
+ ),
+ (anstyle::Style::default(), " world!"),
+ ];
+ verify(&input, expected);
+ }
+
+ #[test]
+ fn middle() {
+ let input = format!("Hello {}!", "world".green().on_red());
+ let expected = vec![
+ (anstyle::Style::default(), "Hello "),
+ (
+ anstyle::AnsiColor::Green.on(anstyle::AnsiColor::Red),
+ "world",
+ ),
+ (anstyle::Style::default(), "!"),
+ ];
+ verify(&input, expected);
+ }
+
+ #[test]
+ fn end() {
+ let input = format!("Hello {}", "world!".green().on_red());
+ let expected = vec![
+ (anstyle::Style::default(), "Hello "),
+ (
+ anstyle::AnsiColor::Green.on(anstyle::AnsiColor::Red),
+ "world!",
+ ),
+ ];
+ verify(&input, expected);
+ }
+
+ #[test]
+ fn ansi256_colors() {
+ // termcolor only supports "brights" via these
+ let input = format!(
+ "Hello {}!",
+ "world".color(owo_colors::XtermColors::UserBrightYellow)
+ );
+ let expected = vec![
+ (anstyle::Style::default(), "Hello "),
+ (anstyle::Ansi256Color(11).on_default(), "world"),
+ (anstyle::Style::default(), "!"),
+ ];
+ verify(&input, expected);
+ }
+
+ proptest! {
+ #[test]
+ #[cfg_attr(miri, ignore)] // See https://github.com/AltSysrq/proptest/issues/253
+ fn wincon_no_escapes(s in "\\PC*") {
+ let expected = if s.is_empty() {
+ vec![]
+ } else {
+ vec![(anstyle::Style::default(), s.clone())]
+ };
+ let mut state = WinconBytes::new();
+ let actual = state.extract_next(s.as_bytes()).collect::<Vec<_>>();
+ assert_eq!(expected, actual);
+ }
+ }
+}
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