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|
use once_cell::sync::Lazy;
use syntect::easy::HighlightLines;
use syntect::highlighting::{
Color, FontStyle, Style, StyleModifier, Theme, ThemeItem, ThemeSettings,
};
use syntect::parsing::SyntaxSet;
use typst::syntax;
use super::{FontFamily, Hyphenate, LinebreakNode, TextNode};
use crate::layout::BlockNode;
use crate::prelude::*;
/// Raw text with optional syntax highlighting.
#[derive(Debug, Hash)]
pub struct RawNode {
/// The raw text.
pub text: EcoString,
/// Whether the node is block-level.
pub block: bool,
}
#[node(Show)]
impl RawNode {
/// The language to syntax-highlight in.
#[property(referenced)]
pub const LANG: Option<EcoString> = None;
fn construct(_: &Vm, args: &mut Args) -> SourceResult<Content> {
Ok(Self {
text: args.expect("text")?,
block: args.named("block")?.unwrap_or(false),
}
.pack())
}
fn field(&self, name: &str) -> Option<Value> {
match name {
"text" => Some(Value::Str(self.text.clone().into())),
"block" => Some(Value::Bool(self.block)),
_ => None,
}
}
}
impl Show for RawNode {
fn show(&self, _: Tracked<dyn World>, styles: StyleChain) -> Content {
let lang = styles.get(Self::LANG).as_ref().map(|s| s.to_lowercase());
let foreground = THEME
.settings
.foreground
.map(Color::from)
.unwrap_or(Color::BLACK)
.into();
let mut realized = if matches!(lang.as_deref(), Some("typ" | "typst" | "typc")) {
let root = match lang.as_deref() {
Some("typc") => syntax::parse_code(&self.text),
_ => syntax::parse(&self.text),
};
let mut seq = vec![];
syntax::highlight::highlight_themed(&root, &THEME, |range, style| {
seq.push(styled(&self.text[range], foreground, style));
});
Content::sequence(seq)
} else if let Some(syntax) =
lang.and_then(|token| SYNTAXES.find_syntax_by_token(&token))
{
let mut seq = vec![];
let mut highlighter = HighlightLines::new(syntax, &THEME);
for (i, line) in self.text.lines().enumerate() {
if i != 0 {
seq.push(LinebreakNode { justify: false }.pack());
}
for (style, piece) in
highlighter.highlight_line(line, &SYNTAXES).into_iter().flatten()
{
seq.push(styled(piece, foreground, style));
}
}
Content::sequence(seq)
} else {
TextNode::packed(self.text.clone())
};
if self.block {
realized = BlockNode(realized).pack();
}
let mut map = StyleMap::new();
map.set(TextNode::OVERHANG, false);
map.set(TextNode::HYPHENATE, Hyphenate(Smart::Custom(false)));
map.set(TextNode::SMART_QUOTES, false);
map.set_family(FontFamily::new("IBM Plex Mono"), styles);
realized.styled_with_map(map)
}
}
/// Style a piece of text with a syntect style.
fn styled(piece: &str, foreground: Paint, style: Style) -> Content {
let mut body = TextNode::packed(piece);
let paint = style.foreground.into();
if paint != foreground {
body = body.styled(TextNode::FILL, paint);
}
if style.font_style.contains(FontStyle::BOLD) {
body = body.strong();
}
if style.font_style.contains(FontStyle::ITALIC) {
body = body.emph();
}
if style.font_style.contains(FontStyle::UNDERLINE) {
body = body.underlined();
}
body
}
/// The syntect syntax definitions.
static SYNTAXES: Lazy<SyntaxSet> = Lazy::new(|| SyntaxSet::load_defaults_newlines());
/// The default theme used for syntax highlighting.
#[rustfmt::skip]
pub static THEME: Lazy<Theme> = Lazy::new(|| Theme {
name: Some("Typst Light".into()),
author: Some("The Typst Project Developers".into()),
settings: ThemeSettings::default(),
scopes: vec![
item("comment", Some("#8a8a8a"), None),
item("constant.character.escape", Some("#1d6c76"), None),
item("constant.character.shortcut", Some("#1d6c76"), None),
item("markup.bold", None, Some(FontStyle::BOLD)),
item("markup.italic", None, Some(FontStyle::ITALIC)),
item("markup.underline", None, Some(FontStyle::UNDERLINE)),
item("markup.raw", Some("#818181"), None),
item("string.other.math.typst", None, None),
item("punctuation.definition.math", Some("#298e0d"), None),
item("keyword.operator.math", Some("#1d6c76"), None),
item("markup.heading, entity.name.section", None, Some(FontStyle::BOLD)),
item("markup.heading.typst", None, Some(FontStyle::BOLD | FontStyle::UNDERLINE)),
item("punctuation.definition.list", Some("#8b41b1"), None),
item("markup.list.term", None, Some(FontStyle::BOLD)),
item("entity.name.label, markup.other.reference", Some("#1d6c76"), None),
item("keyword, constant.language, variable.language", Some("#d73a49"), None),
item("storage.type, storage.modifier", Some("#d73a49"), None),
item("constant", Some("#b60157"), None),
item("string", Some("#298e0d"), None),
item("entity.name, variable.function, support", Some("#4b69c6"), None),
item("support.macro", Some("#16718d"), None),
item("meta.annotation", Some("#301414"), None),
item("entity.other, meta.interpolation", Some("#8b41b1"), None),
item("invalid", Some("#ff0000"), None),
],
});
/// Create a syntect theme item.
fn item(scope: &str, color: Option<&str>, font_style: Option<FontStyle>) -> ThemeItem {
ThemeItem {
scope: scope.parse().unwrap(),
style: StyleModifier {
foreground: color.map(|s| s.parse::<RgbaColor>().unwrap().into()),
background: None,
font_style,
},
}
}
|
