136 lines
4.5 KiB
Rust
136 lines
4.5 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_while1;
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use nom::character::complete::anychar;
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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::eof;
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use nom::combinator::peek;
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use nom::combinator::recognize;
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use nom::multi::many0;
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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::keyword::affiliated_keyword;
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use super::org_source::OrgSource;
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use super::util::get_consumed;
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use super::util::maybe_consume_trailing_whitespace_if_not_exiting;
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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::ContextMatcher;
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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::util::exit_matcher_parser;
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use crate::parser::util::start_of_line;
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use crate::types::LatexEnvironment;
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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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pub(crate) fn latex_environment<'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>, LatexEnvironment<'s>> {
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let (remaining, affiliated_keywords) = many0(affiliated_keyword)(input)?;
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let value_start = remaining;
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start_of_line(remaining)?;
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let (remaining, _leading_whitespace) = space0(remaining)?;
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let (remaining, (_opening, name, _open_close_brace, _ws, _line_ending)) = tuple((
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tag_no_case(r#"\begin{"#),
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name,
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tag("}"),
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space0,
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line_ending,
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))(remaining)?;
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let latex_environment_end_specialized = latex_environment_end(name.into());
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let parser_context = ContextElement::ExitMatcherNode(ExitMatcherNode {
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class: ExitClass::Beta,
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exit_matcher: &latex_environment_end_specialized,
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});
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let parser_context = context.with_additional_node(&parser_context);
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let (remaining, _contents) = contents(&latex_environment_end_specialized)(context, remaining)?;
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let (remaining, _end) = latex_environment_end_specialized(&parser_context, remaining)?;
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let value_end = remaining;
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let (remaining, _trailing_ws) =
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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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let value = get_consumed(value_start, value_end);
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Ok((
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remaining,
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LatexEnvironment {
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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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value: value.into(),
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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 name<'s>(input: OrgSource<'s>) -> Res<OrgSource<'s>, OrgSource<'s>> {
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take_while1(|c: char| c.is_alphanumeric() || c == '*')(input)
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}
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fn contents<F: ContextMatcher>(end_matcher: F) -> impl ContextMatcher {
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move |context, input| _contents(&end_matcher, context, 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, end_matcher))
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)]
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fn _contents<'b, 'g, 'r, 's, F: ContextMatcher>(
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end_matcher: F,
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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 (remaining, source) = recognize(many_till(
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anychar,
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peek(alt((
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parser_with_context!(exit_matcher_parser)(context),
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parser_with_context!(&end_matcher)(context),
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))),
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))(input)?;
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Ok((remaining, source))
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}
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fn latex_environment_end(current_name: &str) -> impl ContextMatcher {
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let current_name_lower = current_name.to_lowercase();
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move |context, input: OrgSource<'_>| {
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_latex_environment_end(context, input, current_name_lower.as_str())
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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 _latex_environment_end<'b, 'g, 'r, 's, 'c>(
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_context: RefContext<'b, 'g, 'r, 's>,
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input: OrgSource<'s>,
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current_name_lower: &'c str,
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) -> Res<OrgSource<'s>, OrgSource<'s>> {
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start_of_line(input)?;
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let (remaining, _leading_whitespace) = space0(input)?;
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let (remaining, (_begin, _name, _close_brace, _ws, _line_ending)) = tuple((
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tag_no_case(r#"\end{"#),
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tag_no_case(current_name_lower),
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tag("}"),
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space0,
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alt((eof, line_ending)),
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))(remaining)?;
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let source = get_consumed(input, remaining);
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Ok((remaining, source))
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}
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