117 lines
4.0 KiB
Rust
117 lines
4.0 KiB
Rust
use nom::branch::alt;
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use nom::bytes::complete::is_not;
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use nom::bytes::complete::tag_no_case;
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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::character::complete::space1;
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use nom::combinator::eof;
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use nom::combinator::not;
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use nom::combinator::opt;
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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::Context;
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use crate::error::CustomError;
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use crate::error::MyError;
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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::exiting::ExitClass;
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use crate::parser::greater_element::DynamicBlock;
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use crate::parser::lesser_element::Paragraph;
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use crate::parser::parser_context::ContextElement;
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use crate::parser::parser_context::ExitMatcherNode;
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use crate::parser::parser_with_context::parser_with_context;
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use crate::parser::source::SetSource;
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use crate::parser::util::blank_line;
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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::Element;
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#[tracing::instrument(ret, level = "debug")]
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pub fn dynamic_block<'r, 's>(
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context: Context<'r, 's>,
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input: &'s str,
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) -> Res<&'s str, DynamicBlock<'s>> {
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// TODO: Do I need to differentiate between different dynamic block types.
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if immediate_in_section(context, "dynamic block") {
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return Err(nom::Err::Error(CustomError::MyError(MyError(
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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(context, input)?;
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let (remaining, _leading_whitespace) = space0(input)?;
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let (remaining, (_begin, name, parameters, _ws)) = tuple((
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recognize(tuple((tag_no_case("#+begin:"), space1))),
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name,
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opt(tuple((space1, parameters))),
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line_ending,
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))(remaining)?;
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let parser_context = context
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.with_additional_node(ContextElement::ConsumeTrailingWhitespace(true))
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.with_additional_node(ContextElement::Context("dynamic block"))
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.with_additional_node(ContextElement::ExitMatcherNode(ExitMatcherNode {
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class: ExitClass::Alpha,
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exit_matcher: &dynamic_block_end,
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}));
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let parameters = match parameters {
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Some((_ws, parameters)) => Some(parameters),
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None => None,
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};
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let element_matcher = parser_with_context!(element(true))(&parser_context);
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let exit_matcher = parser_with_context!(exit_matcher_parser)(&parser_context);
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let (remaining, children) = match tuple((
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not(exit_matcher),
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blank_line,
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many_till(blank_line, exit_matcher),
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))(remaining)
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{
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Ok((remain, (_not_immediate_exit, first_line, (_trailing_whitespace, _exit_contents)))) => {
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let mut element = Element::Paragraph(Paragraph::of_text(first_line));
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let source = get_consumed(remaining, remain);
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element.set_source(source);
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(remain, vec![element])
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}
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Err(_) => {
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let (remaining, (children, _exit_contents)) =
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many_till(element_matcher, exit_matcher)(remaining)?;
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(remaining, children)
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}
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};
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let (remaining, _end) = dynamic_block_end(&parser_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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DynamicBlock {
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source,
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name,
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parameters,
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children,
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},
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))
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}
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#[tracing::instrument(ret, level = "debug")]
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fn name<'s>(input: &'s str) -> Res<&'s str, &'s str> {
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is_not(" \t\r\n")(input)
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}
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#[tracing::instrument(ret, level = "debug")]
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fn parameters<'s>(input: &'s str) -> Res<&'s str, &'s str> {
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is_not("\r\n")(input)
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}
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#[tracing::instrument(ret, level = "debug")]
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fn dynamic_block_end<'r, 's>(context: Context<'r, 's>, input: &'s str) -> Res<&'s str, &'s str> {
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start_of_line(context, input)?;
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let (remaining, source) = recognize(tuple((
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space0,
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tag_no_case("#+end:"),
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alt((eof, line_ending)),
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)))(input)?;
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Ok((remaining, source))
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}
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