110 lines
2.6 KiB
Rust
110 lines
2.6 KiB
Rust
use crate::err::{ProcessingResult, ErrorType};
|
|
use crate::proc::{Processor};
|
|
|
|
fn is_string_delimiter(c: u8) -> bool {
|
|
c == b'"' || c == b'\''
|
|
}
|
|
|
|
fn parse_comment_single(proc: &mut Processor) -> ProcessingResult<()> {
|
|
chain!(proc.match_seq(b"//").expect().keep());
|
|
|
|
// Comment can end at closing </script>.
|
|
// TODO WARNING: Closing tag must not contain whitespace.
|
|
// TODO Optimise
|
|
while !chain!(proc.match_line_terminator().keep().matched()) {
|
|
if chain!(proc.match_seq(b"</script>").matched()) {
|
|
break;
|
|
}
|
|
|
|
proc.accept()?;
|
|
}
|
|
|
|
Ok(())
|
|
}
|
|
|
|
fn parse_comment_multi(proc: &mut Processor) -> ProcessingResult<()> {
|
|
chain!(proc.match_seq(b"/*").expect().keep());
|
|
|
|
// Comment can end at closing </script>.
|
|
// TODO WARNING: Closing tag must not contain whitespace.
|
|
// TODO Optimise
|
|
while !chain!(proc.match_seq(b"*/").keep().matched()) {
|
|
if chain!(proc.match_seq(b"</script>").matched()) {
|
|
break;
|
|
}
|
|
|
|
proc.accept()?;
|
|
};
|
|
|
|
Ok(())
|
|
}
|
|
|
|
fn parse_string(proc: &mut Processor) -> ProcessingResult<()> {
|
|
let delim = chain!(proc.match_pred(is_string_delimiter).expect().keep().char());
|
|
|
|
let mut escaping = false;
|
|
|
|
loop {
|
|
let c = proc.accept()?;
|
|
|
|
if c == b'\\' {
|
|
escaping = !escaping;
|
|
continue;
|
|
}
|
|
|
|
if c == delim && !escaping {
|
|
break;
|
|
}
|
|
|
|
if chain!(proc.match_line_terminator().keep().matched()) {
|
|
if !escaping {
|
|
return Err(ErrorType::UnterminatedJsString);
|
|
}
|
|
}
|
|
|
|
escaping = false;
|
|
};
|
|
|
|
Ok(())
|
|
}
|
|
|
|
fn parse_template(proc: &mut Processor) -> ProcessingResult<()> {
|
|
chain!(proc.match_char(b'`').expect().keep());
|
|
|
|
let mut escaping = false;
|
|
|
|
loop {
|
|
let c = proc.accept()?;
|
|
|
|
if c == b'\\' {
|
|
escaping = !escaping;
|
|
continue;
|
|
}
|
|
|
|
if c == b'`' && !escaping {
|
|
break;
|
|
}
|
|
|
|
escaping = false;
|
|
};
|
|
|
|
Ok(())
|
|
}
|
|
|
|
pub fn process_js_script(proc: &mut Processor) -> ProcessingResult<()> {
|
|
while !chain!(proc.match_seq(b"</").matched()) {
|
|
if chain!(proc.match_seq(b"//").matched()) {
|
|
parse_comment_single(proc)?;
|
|
} else if chain!(proc.match_seq(b"/*").matched()) {
|
|
parse_comment_multi(proc)?;
|
|
} else if chain!(proc.match_pred(is_string_delimiter).matched()) {
|
|
parse_string(proc)?;
|
|
} else if chain!(proc.match_char(b'`').matched()) {
|
|
parse_template(proc)?;
|
|
} else {
|
|
proc.accept()?;
|
|
}
|
|
};
|
|
Ok(())
|
|
}
|