66 lines
1.5 KiB
Rust
66 lines
1.5 KiB
Rust
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use crate::proc::Processor;
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use crate::err::{HbRes, HbErr};
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use crate::code::Code;
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fn is_string_delimiter(c: u8) -> bool {
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match c {
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b'"' | b'\'' => true,
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_ => false,
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}
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}
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fn parse_comment<D: Code>(proc: &Processor<D>) -> HbRes<()> {
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proc.match_seq(b"/*").expect().keep();
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// Unlike script tags, style comments do NOT end at closing tag.
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while !proc.match_seq(b"*/").keep().matched() {
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proc.accept();
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};
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Ok(())
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}
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fn parse_string<D: Code>(proc: &Processor<D>) -> HbRes<()> {
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let delim = proc.match_pred(is_string_delimiter).expect().keep().char();
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let mut escaping = false;
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loop {
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let c = proc.accept()?;
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if c == b'\\' {
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escaping = !escaping;
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continue;
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}
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if c == delim && !escaping {
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break;
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}
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if proc.match_line_terminator().keep().matched() {
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if !escaping {
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// TODO Use better error type.
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return Err(HbErr::ExpectedNotFound("Unterminated CSS string"));
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}
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}
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escaping = false;
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};
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Ok(())
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}
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pub fn process_style<D: Code>(proc: &Processor<D>) -> HbRes<()> {
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while !proc.match_seq(b"</").matched() {
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if proc.match_seq(b"/*").matched() {
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parse_comment(proc)?;
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} else if proc.match_pred(is_string_delimiter).matched() {
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parse_string(proc)?;
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} else {
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proc.accept()?;
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}
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};
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Ok(())
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}
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