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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 struct OpenNode<'a> {
pub nodes: Vec<crate::Node<'a>>,
pub start: usize,
pub type_: OpenNodeType<'a>,
}
pub enum OpenNodeType<'a> {
DefinitionList {
items: Vec<crate::DefinitionListItem<'a>>,
},
ExternalLink,
Heading {
level: u8,
},
Link {
namespace: Option<crate::Namespace>,
target: &'a str,
},
OrderedList {
items: Vec<crate::ListItem<'a>>,
},
Parameter {
default: Option<Vec<crate::Node<'a>>>,
name: Option<Vec<crate::Node<'a>>>,
},
Preformatted,
Table(Table<'a>),
Tag {
name: crate::Cow<'a, str>,
},
Template {
name: Option<Vec<crate::Node<'a>>>,
parameters: Vec<crate::Parameter<'a>>,
},
UnorderedList {
items: Vec<crate::ListItem<'a>>,
},
}
pub struct State<'a> {
pub flushed_position: usize,
pub nodes: Vec<crate::Node<'a>>,
pub scan_position: usize,
pub stack: Vec<OpenNode<'a>>,
pub warnings: Vec<crate::Warning>,
pub wiki_text: &'a str,
}
pub struct Table<'a> {
pub attributes: Vec<crate::Node<'a>>,
pub before: Vec<crate::Node<'a>>,
pub captions: Vec<crate::TableCaption<'a>>,
pub child_element_attributes: Option<Vec<crate::Node<'a>>>,
pub rows: Vec<crate::TableRow<'a>>,
pub start: usize,
pub state: TableState,
}
pub enum TableState {
Before,
CaptionFirstLine,
CaptionRemainder,
CellFirstLine,
CellRemainder,
HeadingFirstLine,
HeadingRemainder,
Row,
TableAttributes,
}
impl<'a> State<'a> {
pub fn flush(&mut self, end_position: usize) {
flush(
&mut self.nodes,
self.flushed_position,
end_position,
self.wiki_text,
);
}
pub fn get_byte(&self, position: usize) -> Option<u8> {
self.wiki_text.as_bytes().get(position).cloned()
}
pub fn push_open_node(&mut self, type_: OpenNodeType<'a>, inner_start_position: usize) {
let scan_position = self.scan_position;
self.flush(scan_position);
self.stack.push(OpenNode {
nodes: std::mem::replace(&mut self.nodes, vec![]),
start: scan_position,
type_,
});
self.scan_position = inner_start_position;
self.flushed_position = inner_start_position;
}
pub fn rewind(&mut self, nodes: Vec<crate::Node<'a>>, position: usize) {
self.scan_position = position + 1;
self.nodes = nodes;
if let Some(position_before_text) = match self.nodes.last() {
Some(crate::Node::Text { start, .. }) => Some(*start),
_ => None,
} {
self.nodes.pop();
self.flushed_position = position_before_text;
} else {
self.flushed_position = position;
}
}
pub fn skip_empty_lines(&mut self) {
match self.stack.last() {
Some(OpenNode {
type_: OpenNodeType::Table { .. },
..
}) => {
self.scan_position -= 1;
crate::table::parse_table_end_of_line(self, false);
}
_ => {
crate::line::parse_beginning_of_line(self, None);
}
}
}
pub fn skip_whitespace_backwards(&self, position: usize) -> usize {
skip_whitespace_backwards(self.wiki_text, position)
}
pub fn skip_whitespace_forwards(&self, position: usize) -> usize {
skip_whitespace_forwards(self.wiki_text, position)
}
}
pub fn flush<'a>(
nodes: &mut Vec<crate::Node<'a>>,
flushed_position: usize,
end_position: usize,
wiki_text: &'a str,
) {
if end_position > flushed_position {
nodes.push(crate::Node::Text {
end: end_position,
start: flushed_position,
value: &wiki_text[flushed_position..end_position],
});
}
}
pub fn skip_whitespace_backwards(wiki_text: &str, mut position: usize) -> usize {
while position > 0
&& match wiki_text.as_bytes()[position - 1] {
b'\t' | b'\n' | b' ' => true,
_ => false,
}
{
position -= 1;
}
position
}
pub fn skip_whitespace_forwards(wiki_text: &str, mut position: usize) -> usize {
while match wiki_text.as_bytes().get(position).cloned() {
Some(b'\t') | Some(b'\n') | Some(b' ') => true,
_ => false,
} {
position += 1;
}
position
}
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