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// Copyright 2019 Fredrik Portström <https://portstrom.com>
// This is free software distributed under the terms specified in
// the file LICENSE at the top-level directory of this distribution.
pub fn parse_redirect(
state: &mut crate::State,
configuration: &crate::Configuration,
start_position: usize,
) {
let mut position = match configuration
.redirect_magic_words
.find(&state.wiki_text[start_position + 1..])
{
Err(_) => return,
Ok((match_length, _)) => match_length + start_position + 1,
};
loop {
match state.get_byte(position) {
Some(b'\t') | Some(b'\n') | Some(b' ') => position += 1,
Some(b':') => {
position += 1;
loop {
match state.get_byte(position) {
Some(b'\t') | Some(b'\n') | Some(b' ') => position += 1,
Some(b'[') => break,
_ => return,
}
}
break;
}
Some(b'[') => break,
_ => return,
}
}
if state.get_byte(position + 1) != Some(b'[') {
return;
}
position += 2;
let target_end_position;
let target_start_position = position;
loop {
match state.get_byte(position) {
None | Some(b'\n') | Some(b'[') | Some(b'{') | Some(b'}') => return,
Some(b']') => {
target_end_position = position;
break;
}
Some(b'|') => {
state.warnings.push(crate::Warning {
end: position + 1,
message: crate::WarningMessage::UselessTextInRedirect,
start: position,
});
target_end_position = position;
position += 1;
loop {
match state.get_byte(position) {
None | Some(b'\n') => return,
Some(b']') => break,
Some(_) => position += 1,
}
}
break;
}
Some(_) => position += 1,
}
}
if state.get_byte(position + 1) == Some(b']') {
position += 2;
state.nodes.push(crate::Node::Redirect {
end: position,
start: start_position,
target: &state.wiki_text[target_start_position..target_end_position],
});
state.flushed_position = state.skip_whitespace_forwards(position);
state.scan_position = state.flushed_position;
if state.wiki_text.len() > position {
state.warnings.push(crate::Warning {
end: state.wiki_text.len(),
message: crate::WarningMessage::TextAfterRedirect,
start: start_position,
});
}
return;
}
}
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