142 lines
4.6 KiB
Rust
142 lines
4.6 KiB
Rust
use nom::branch::alt;
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use nom::bytes::complete::tag;
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use nom::bytes::complete::tag_no_case;
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use nom::bytes::complete::take_while;
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use nom::character::complete::line_ending;
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use nom::character::complete::space0;
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use nom::combinator::consumed;
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use nom::combinator::eof;
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use nom::combinator::not;
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use nom::combinator::recognize;
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use nom::multi::many_till;
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use nom::sequence::tuple;
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use super::affiliated_keyword::parse_affiliated_keywords;
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use super::org_source::OrgSource;
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use super::paragraph::empty_paragraph;
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use super::util::maybe_consume_trailing_whitespace_if_not_exiting;
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use crate::context::bind_context;
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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::CustomError;
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use crate::error::Res;
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use crate::parser::element_parser::element;
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use crate::parser::util::exit_matcher_parser;
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use crate::parser::util::get_consumed;
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use crate::parser::util::immediate_in_section;
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use crate::parser::util::start_of_line;
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use crate::parser::util::WORD_CONSTITUENT_CHARACTERS;
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use crate::types::Drawer;
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use crate::types::Element;
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use crate::types::Keyword;
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#[cfg_attr(
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feature = "tracing",
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tracing::instrument(ret, level = "debug", skip(context, affiliated_keywords))
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)]
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pub(crate) fn drawer<'b, 'g, 'r, 's, AK>(
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affiliated_keywords: AK,
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remaining: OrgSource<'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>, Drawer<'s>>
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where
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AK: IntoIterator<Item = Keyword<'s>>,
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{
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if immediate_in_section(context, "drawer") {
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return Err(nom::Err::Error(CustomError::Static(
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"Cannot nest objects of the same element",
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)));
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}
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start_of_line(remaining)?;
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let (remaining, _leading_whitespace) = space0(remaining)?;
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let (remaining, (_open_colon, drawer_name, _close_colon, _new_line)) = tuple((
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tag(":"),
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name,
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tag(":"),
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recognize(tuple((space0, line_ending))),
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))(remaining)?;
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let contexts = [
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ContextElement::ConsumeTrailingWhitespace(true),
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ContextElement::Context("drawer"),
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ContextElement::ExitMatcherNode(ExitMatcherNode {
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class: ExitClass::Alpha,
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exit_matcher: &drawer_end,
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}),
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];
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let parser_context = context.with_additional_node(&contexts[0]);
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let parser_context = parser_context.with_additional_node(&contexts[1]);
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let parser_context = parser_context.with_additional_node(&contexts[2]);
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let (remaining, (contents, children)) =
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consumed(parser_with_context!(children)(&parser_context))(remaining)?;
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let (remaining, _end) = drawer_end(&parser_context, remaining)?;
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let (remaining, post_blank) =
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maybe_consume_trailing_whitespace_if_not_exiting(context, remaining)?;
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let source = get_consumed(input, remaining);
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Ok((
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remaining,
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Drawer {
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source: source.into(),
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affiliated_keywords: parse_affiliated_keywords(
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context.get_global_settings(),
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affiliated_keywords,
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),
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drawer_name: drawer_name.into(),
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children,
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contents: Some(contents.into()),
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post_blank: post_blank.map(Into::<&str>::into),
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},
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))
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}
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#[cfg_attr(
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feature = "tracing",
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tracing::instrument(ret, level = "debug", skip(context))
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)]
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fn children<'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>, Vec<Element<'s>>> {
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let element_matcher = parser_with_context!(element(true))(context);
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let exit_matcher = parser_with_context!(exit_matcher_parser)(context);
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if let Ok((remaining, (_not_exit, empty_para))) =
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tuple((not(exit_matcher), bind_context!(empty_paragraph, context)))(input)
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{
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return Ok((remaining, vec![Element::Paragraph(empty_para)]));
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}
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let (remaining, (children, _exit_contents)) = many_till(element_matcher, exit_matcher)(input)?;
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Ok((remaining, children))
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}
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#[cfg_attr(feature = "tracing", tracing::instrument(ret, level = "debug"))]
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fn name<'s>(input: OrgSource<'s>) -> Res<OrgSource<'s>, OrgSource<'s>> {
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take_while(|c| WORD_CONSTITUENT_CHARACTERS.contains(c) || "-_".contains(c))(input)
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}
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#[cfg_attr(
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feature = "tracing",
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tracing::instrument(ret, level = "debug", skip(_context))
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)]
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fn drawer_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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start_of_line(input)?;
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recognize(tuple((
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space0,
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tag_no_case(":end:"),
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space0,
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alt((line_ending, eof)),
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)))(input)
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}
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