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tokio-xmpp: Improve highlight_xml()

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First switch to LazyLock from OnceLock, to simplify the code.

Then concatenate the colour reset escape code instead of using
format!(), since the vast majority of those strings have more capacity
than their length it will avoid a reallocation in most cases.
This commit is contained in:
Emmanuel Gil Peyrot 2024-09-01 12:30:18 +02:00
parent 263839a5f8
commit 425be4bef4
1 changed files with 15 additions and 15 deletions
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30
tokio-xmpp/src/xmlstream/mod.rs
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@ -62,7 +62,7 @@ use core::pin::Pin;
use core::task::{Context, Poll};
use std::io;
#[cfg(feature = "syntax-highlighting")]
use std::sync::OnceLock;
use std::sync::LazyLock;
use futures::{ready, Sink, SinkExt, Stream};
@ -85,25 +85,25 @@ pub use self::responder::{AcceptedStream, PendingFeaturesSend};
pub use self::xmpp::XmppStreamElement;
#[cfg(feature = "syntax-highlighting")]
static PS: OnceLock<syntect::parsing::SyntaxSet> = OnceLock::new();
static PS: LazyLock<syntect::parsing::SyntaxSet> =
LazyLock::new(syntect::parsing::SyntaxSet::load_defaults_newlines);
#[cfg(feature = "syntax-highlighting")]
static SYNTAX: OnceLock<syntect::parsing::SyntaxReference> = OnceLock::new();
static SYNTAX: LazyLock<&syntect::parsing::SyntaxReference> =
LazyLock::new(|| PS.find_syntax_by_extension("xml").unwrap());
#[cfg(feature = "syntax-highlighting")]
static THEME: OnceLock<syntect::highlighting::Theme> = OnceLock::new();
static THEME: LazyLock<syntect::highlighting::Theme> = LazyLock::new(|| {
syntect::highlighting::ThemeSet::load_defaults().themes["Solarized (dark)"].clone()
});
#[cfg(feature = "syntax-highlighting")]
fn highlight_xml(xml: &str) -> String {
let ps = PS.get_or_init(syntect::parsing::SyntaxSet::load_defaults_newlines);
let mut h = syntect::easy::HighlightLines::new(
SYNTAX.get_or_init(|| ps.find_syntax_by_extension("xml").unwrap().clone()),
THEME.get_or_init(|| {
syntect::highlighting::ThemeSet::load_defaults().themes["Solarized (dark)"].clone()
}),
);
let ranges: Vec<_> = h.highlight_line(&xml, ps).unwrap();
let escaped = syntect::util::as_24_bit_terminal_escaped(&ranges[..], false);
format!("{}\x1b[0m", escaped)
let mut h = syntect::easy::HighlightLines::new(&SYNTAX, &THEME);
let ranges: Vec<_> = h.highlight_line(&xml, &PS).unwrap();
let mut escaped = syntect::util::as_24_bit_terminal_escaped(&ranges[..], false);
escaped += "\x1b[0m";
escaped
}
struct LogXsoBuf<'x>(&'x [u8]);