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extern crate libsyntax2;
extern crate text_unit;
use libsyntax2::{
algo::walk,
SyntaxKind::*,
};
use text_unit::TextRange;
pub struct File {
inner: libsyntax2::File
}
pub struct HighlightedRange {
pub range: TextRange,
pub tag: &'static str,
}
impl File {
pub fn new(text: &str) -> File {
File {
inner: libsyntax2::File::parse(text)
}
}
pub fn highlight(&self) -> Vec<HighlightedRange> {
let syntax = self.inner.syntax();
let mut res = Vec::new();
for node in walk::preorder(syntax.as_ref()) {
let tag = match node.kind() {
ERROR => "error",
COMMENT | DOC_COMMENT => "comment",
STRING | RAW_STRING | RAW_BYTE_STRING | BYTE_STRING => "string",
ATTR => "attribute",
NAME_REF => "text",
NAME => "function",
INT_NUMBER | FLOAT_NUMBER | CHAR | BYTE => "literal",
LIFETIME => "parameter",
k if k.is_keyword() => "keyword",
_ => continue,
};
res.push(HighlightedRange {
range: node.range(),
tag
})
}
res
}
pub fn syntax_tree(&self) -> String {
::libsyntax2::utils::dump_tree(&self.inner.syntax())
}
}
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