94 lines
3.0 KiB
Rust
94 lines
3.0 KiB
Rust
use nom::bytes::complete::tag;
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use nom::character::complete::anychar;
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use nom::combinator::opt;
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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::org_source::OrgSource;
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use super::util::maybe_consume_object_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::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::get_consumed;
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use crate::types::ExportSnippet;
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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 export_snippet<'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>, ExportSnippet<'s>> {
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let (remaining, _) = tag("@@")(input)?;
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let (remaining, backend_name) = backend(context, remaining)?;
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let parser_context = ContextElement::ExitMatcherNode(ExitMatcherNode {
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class: ExitClass::Gamma,
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exit_matcher: &export_snippet_end,
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});
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let parser_context = context.with_additional_node(&parser_context);
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let (remaining, backend_contents) = opt(tuple((
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tag(":"),
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parser_with_context!(contents)(&parser_context),
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)))(remaining)?;
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let (remaining, _) = tag("@@")(remaining)?;
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let (remaining, _trailing_whitespace) =
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maybe_consume_object_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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ExportSnippet {
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source: source.into(),
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backend: backend_name.into(),
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contents: backend_contents.map(|(_colon, backend_contents)| backend_contents.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 backend<'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 (remaining, backend_name) =
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recognize(many1(verify(anychar, |c| c.is_alphanumeric() || *c == '-')))(input)?;
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Ok((remaining, backend_name))
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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 contents<'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 (remaining, source) = recognize(verify(
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many_till(anychar, parser_with_context!(exit_matcher_parser)(context)),
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|(children, _exit_contents)| !children.is_empty(),
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))(input)?;
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Ok((remaining, source))
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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 export_snippet_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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tag("@@")(input)
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}
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