100 lines
3.5 KiB
Rust
100 lines
3.5 KiB
Rust
use nom::branch::alt;
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use nom::combinator::eof;
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use nom::combinator::recognize;
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use nom::combinator::verify;
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use nom::multi::many1;
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use nom::multi::many_till;
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use nom::sequence::tuple;
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use super::element_parser::detect_element;
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use super::org_source::OrgSource;
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use super::util::blank_line;
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use super::util::get_consumed;
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use crate::context::parser_with_context;
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use crate::context::ContextElement;
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use crate::context::ExitClass;
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use crate::context::ExitMatcherNode;
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use crate::context::RefContext;
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use crate::error::Res;
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use crate::parser::object_parser::standard_set_object;
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use crate::parser::util::exit_matcher_parser;
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use crate::parser::util::start_of_line;
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use crate::types::Paragraph;
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#[cfg_attr(feature = "tracing", tracing::instrument(ret, level = "debug"))]
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pub(crate) fn paragraph<'b, 'g, 'r, 's>(
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context: RefContext<'b, 'g, 'r, 's>,
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input: OrgSource<'s>,
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) -> Res<OrgSource<'s>, Paragraph<'s>> {
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let parser_context = ContextElement::ExitMatcherNode(ExitMatcherNode {
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class: ExitClass::Gamma,
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exit_matcher: ¶graph_end,
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});
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let parser_context = context.with_additional_node(&parser_context);
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let standard_set_object_matcher = parser_with_context!(standard_set_object)(&parser_context);
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let exit_matcher = parser_with_context!(exit_matcher_parser)(&parser_context);
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let (remaining, (children, _exit_contents)) = verify(
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many_till(standard_set_object_matcher, exit_matcher),
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|(children, _exit_contents)| !children.is_empty(),
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)(input)?;
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// Not checking parent exit matcher because if there are any children matched then we have a valid paragraph.
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let source = get_consumed(input, remaining);
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Ok((
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remaining,
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Paragraph {
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source: source.into(),
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children,
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},
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))
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}
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#[cfg_attr(feature = "tracing", tracing::instrument(ret, level = "debug"))]
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fn paragraph_end<'b, 'g, 'r, 's>(
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context: RefContext<'b, 'g, 'r, 's>,
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input: OrgSource<'s>,
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) -> Res<OrgSource<'s>, OrgSource<'s>> {
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let non_paragraph_element_matcher = parser_with_context!(detect_element(false))(context);
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alt((
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recognize(tuple((start_of_line, many1(blank_line)))),
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recognize(non_paragraph_element_matcher),
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eof,
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))(input)
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}
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#[cfg(test)]
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mod tests {
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use crate::context::parser_with_context;
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use crate::context::Context;
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use crate::context::ContextElement;
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use crate::context::GlobalSettings;
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use crate::context::List;
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use crate::parser::element_parser::element;
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use crate::parser::org_source::OrgSource;
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use crate::types::GetStandardProperties;
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#[test]
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fn two_paragraphs() {
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let input = OrgSource::new("foo bar baz\n\nlorem ipsum");
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let global_settings = GlobalSettings::default();
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let initial_context = ContextElement::document_context();
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let initial_context = Context::new(&global_settings, List::new(&initial_context));
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let paragraph_matcher = parser_with_context!(element(true))(&initial_context);
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let (remaining, first_paragraph) = paragraph_matcher(input).expect("Parse first paragraph");
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let (remaining, second_paragraph) =
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paragraph_matcher(remaining).expect("Parse second paragraph.");
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assert_eq!(Into::<&str>::into(remaining), "");
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assert_eq!(
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first_paragraph.get_standard_properties().get_source(),
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"foo bar baz\n\n"
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);
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assert_eq!(
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second_paragraph.get_standard_properties().get_source(),
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"lorem ipsum"
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);
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}
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}
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