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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_link_end<'a>(
state: &mut crate::State<'a>,
configuration: &crate::Configuration,
start_position: usize,
nodes: Vec<crate::Node<'a>>,
namespace: Option<crate::Namespace>,
target: &'a str,
) {
let inner_end_position = state.skip_whitespace_backwards(state.scan_position);
state.flush(inner_end_position);
state.scan_position += 2;
state.flushed_position = state.scan_position;
let mut text = std::mem::replace(&mut state.nodes, nodes);
let end = state.scan_position;
let start = start_position;
state.nodes.push(match namespace {
None => {
let mut trail_end_position = end;
for character in state.wiki_text[end..].chars() {
if !configuration.link_trail_character_set.contains(&character) {
break;
}
trail_end_position += character.len_utf8();
}
if trail_end_position > end {
text.push(crate::Node::Text {
end: trail_end_position,
start: end,
value: &state.wiki_text[end..trail_end_position],
});
}
crate::Node::Link {
end: trail_end_position,
start,
target,
text,
}
}
Some(crate::Namespace::Category) => crate::Node::Category {
end,
ordinal: text,
start,
target,
},
Some(crate::Namespace::File) => crate::Node::Image {
end,
start,
target,
text,
},
});
}
pub fn parse_link_start(state: &mut crate::State, configuration: &crate::Configuration) {
if match state.stack.last() {
Some(crate::OpenNode {
type_: crate::OpenNodeType::Link { namespace, .. },
..
}) => *namespace != Some(crate::Namespace::File),
_ => false,
} {
let open_node = state.stack.pop().unwrap();
state.warnings.push(crate::Warning {
end: state.scan_position,
message: crate::WarningMessage::InvalidLinkSyntax,
start: open_node.start,
});
state.rewind(open_node.nodes, open_node.start);
return;
}
let mut target_end_position;
let target_start_position = state.skip_whitespace_forwards(state.scan_position + 2);
let namespace = match configuration
.namespaces
.find(&state.wiki_text[target_start_position..])
{
Err(match_length) => {
target_end_position = match_length + target_start_position;
None
}
Ok((match_length, namespace)) => {
target_end_position = match_length + target_start_position;
Some(namespace)
}
};
loop {
match state.get_byte(target_end_position) {
None | Some(b'\n') | Some(b'[') | Some(b'{') | Some(b'}') => {
parse_unexpected_end(state, target_end_position);
break;
}
Some(b']') => {
parse_end(
state,
configuration,
target_start_position,
target_end_position,
namespace,
);
break;
}
Some(b'|') => {
state.push_open_node(
crate::OpenNodeType::Link {
namespace,
target: &state.wiki_text[target_start_position..target_end_position],
},
target_end_position + 1,
);
break;
}
_ => target_end_position += 1,
}
}
}
fn parse_end(
state: &mut crate::State,
configuration: &crate::Configuration,
target_start_position: usize,
target_end_position: usize,
namespace: Option<crate::Namespace>,
) {
if state.get_byte(target_end_position + 1) != Some(b']') {
parse_unexpected_end(state, target_end_position);
return;
}
let start_position = state.scan_position;
state.flush(start_position);
let trail_start_position = target_end_position + 2;
let mut trail_end_position = trail_start_position;
match namespace {
Some(crate::Namespace::Category) => {
state.nodes.push(crate::Node::Category {
end: trail_end_position,
ordinal: vec![],
start: state.scan_position,
target: state.wiki_text[target_start_position..target_end_position].trim_end(),
});
}
Some(crate::Namespace::File) => {
state.nodes.push(crate::Node::Image {
end: trail_end_position,
start: state.scan_position,
target: state.wiki_text[target_start_position..target_end_position].trim_end(),
text: vec![],
});
}
None => {
for character in state.wiki_text[trail_start_position..].chars() {
if !configuration.link_trail_character_set.contains(&character) {
break;
}
trail_end_position += character.len_utf8();
}
let target_text = crate::Node::Text {
end: target_end_position,
start: target_start_position,
value: &state.wiki_text[target_start_position..target_end_position],
};
let text = if trail_end_position > trail_start_position {
vec![
target_text,
crate::Node::Text {
end: trail_end_position,
start: trail_start_position,
value: &state.wiki_text[trail_start_position..trail_end_position],
},
]
} else {
vec![target_text]
};
state.nodes.push(crate::Node::Link {
end: trail_end_position,
start: state.scan_position,
target: &state.wiki_text[target_start_position..target_end_position].trim_end(),
text,
});
}
}
state.flushed_position = trail_end_position;
state.scan_position = trail_end_position;
}
fn parse_unexpected_end(state: &mut crate::State, target_end_position: usize) {
state.warnings.push(crate::Warning {
end: target_end_position,
message: crate::WarningMessage::InvalidLinkSyntax,
start: state.scan_position,
});
state.scan_position += 1;
}
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