313 lines
12 KiB
Rust
313 lines
12 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::consumed;
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use nom::combinator::eof;
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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::many_till;
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use nom::sequence::tuple;
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use super::org_source::OrgSource;
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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::object_parser::standard_set_object;
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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::start_of_line;
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use crate::parser::util::text_until_exit;
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use crate::types::CommentBlock;
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use crate::types::ExampleBlock;
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use crate::types::ExportBlock;
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use crate::types::Object;
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use crate::types::PlainText;
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use crate::types::SrcBlock;
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use crate::types::VerseBlock;
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#[cfg_attr(feature = "tracing", tracing::instrument(ret, level = "debug"))]
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fn verse_block<'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>, VerseBlock<'s>> {
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let (remaining, name) = lesser_block_begin("verse")(context, input)?;
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let (remaining, parameters) = opt(tuple((space1, data)))(remaining)?;
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let (remaining, _nl) = recognize(tuple((space0, line_ending)))(remaining)?;
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let lesser_block_end_specialized = lesser_block_end("verse");
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let contexts = [
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ContextElement::ConsumeTrailingWhitespace(true),
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ContextElement::Context("lesser block"),
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ContextElement::ExitMatcherNode(ExitMatcherNode {
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class: ExitClass::Alpha,
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exit_matcher: &lesser_block_end_specialized,
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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 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 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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// Check for a completely empty block
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let (remaining, children) = match consumed(many_till(blank_line, exit_matcher))(remaining) {
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Ok((remaining, (whitespace, (_children, _exit_contents)))) => (
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remaining,
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vec![Object::PlainText(PlainText {
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source: whitespace.into(),
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})],
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),
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Err(_) => {
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let (remaining, (children, _exit_contents)) =
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many_till(object_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) = lesser_block_end_specialized(&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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VerseBlock {
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source: source.into(),
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name: name.into(),
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data: parameters.map(|parameters| Into::<&str>::into(parameters)),
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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 comment_block<'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>, CommentBlock<'s>> {
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let (remaining, name) = lesser_block_begin("comment")(context, input)?;
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let (remaining, parameters) = opt(tuple((space1, data)))(remaining)?;
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let (remaining, _nl) = recognize(tuple((space0, line_ending)))(remaining)?;
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let lesser_block_end_specialized = lesser_block_end("comment");
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let contexts = [
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ContextElement::ConsumeTrailingWhitespace(true),
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ContextElement::Context("lesser block"),
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ContextElement::ExitMatcherNode(ExitMatcherNode {
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class: ExitClass::Alpha,
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exit_matcher: &lesser_block_end_specialized,
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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 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 (remaining, contents) = parser_with_context!(text_until_exit)(&parser_context)(remaining)?;
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let (remaining, _end) = lesser_block_end_specialized(&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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CommentBlock {
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source: source.into(),
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name: name.into(),
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data: parameters.map(|parameters| Into::<&str>::into(parameters)),
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contents: contents.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 example_block<'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>, ExampleBlock<'s>> {
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let (remaining, _name) = lesser_block_begin("example")(context, input)?;
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let (remaining, parameters) = opt(tuple((space1, data)))(remaining)?;
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let (remaining, _nl) = recognize(tuple((space0, line_ending)))(remaining)?;
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let lesser_block_end_specialized = lesser_block_end("example");
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let contexts = [
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ContextElement::ConsumeTrailingWhitespace(true),
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ContextElement::Context("lesser block"),
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ContextElement::ExitMatcherNode(ExitMatcherNode {
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class: ExitClass::Alpha,
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exit_matcher: &lesser_block_end_specialized,
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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 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 (remaining, contents) = parser_with_context!(text_until_exit)(&parser_context)(remaining)?;
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let (remaining, _end) = lesser_block_end_specialized(&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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ExampleBlock {
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source: source.into(),
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name: source.into(),
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data: parameters.map(|parameters| Into::<&str>::into(parameters)),
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contents: contents.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 export_block<'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>, ExportBlock<'s>> {
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let (remaining, name) = lesser_block_begin("export")(context, input)?;
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// https://orgmode.org/worg/org-syntax.html#Blocks claims that export blocks must have a single word for data but testing shows no data and multi-word data still parses as an export block.
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let (remaining, parameters) = opt(tuple((space1, data)))(remaining)?;
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let (remaining, _nl) = recognize(tuple((space0, line_ending)))(remaining)?;
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let lesser_block_end_specialized = lesser_block_end("export");
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let contexts = [
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ContextElement::ConsumeTrailingWhitespace(true),
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ContextElement::Context("lesser block"),
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ContextElement::ExitMatcherNode(ExitMatcherNode {
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class: ExitClass::Alpha,
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exit_matcher: &lesser_block_end_specialized,
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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 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 (remaining, contents) = parser_with_context!(text_until_exit)(&parser_context)(remaining)?;
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let (remaining, _end) = lesser_block_end_specialized(&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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ExportBlock {
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source: source.into(),
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name: name.into(),
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data: parameters.map(|parameters| Into::<&str>::into(parameters)),
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contents: contents.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 src_block<'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>, SrcBlock<'s>> {
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let (remaining, name) = lesser_block_begin("src")(context, input)?;
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// https://orgmode.org/worg/org-syntax.html#Blocks claims that data is mandatory and must follow the LANGUAGE SWITCHES ARGUMENTS pattern but testing has shown that no data and incorrect data here will still parse to a src block.
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let (remaining, parameters) = opt(tuple((space1, data)))(remaining)?;
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let (remaining, _nl) = recognize(tuple((space0, line_ending)))(remaining)?;
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let lesser_block_end_specialized = lesser_block_end("src");
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let contexts = [
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ContextElement::ConsumeTrailingWhitespace(true),
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ContextElement::Context("lesser block"),
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ContextElement::ExitMatcherNode(ExitMatcherNode {
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class: ExitClass::Alpha,
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exit_matcher: &lesser_block_end_specialized,
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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 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 (remaining, contents) = parser_with_context!(text_until_exit)(&parser_context)(remaining)?;
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let (remaining, _end) = lesser_block_end_specialized(&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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SrcBlock {
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source: source.into(),
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name: name.into(),
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data: parameters.map(|parameters| Into::<&str>::into(parameters)),
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contents: contents.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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is_not(" \t\r\n")(input)
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}
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#[cfg_attr(feature = "tracing", tracing::instrument(ret, level = "debug"))]
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fn data<'s>(input: OrgSource<'s>) -> Res<OrgSource<'s>, OrgSource<'s>> {
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is_not("\r\n")(input)
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}
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fn lesser_block_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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_lesser_block_end(context, input, current_name_lower.as_str())
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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 _lesser_block_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, _ws, _ending)) = tuple((
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tag_no_case("#+end_"),
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tag_no_case(current_name_lower),
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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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/// Parser for the beginning of a lesser block
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///
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/// current_name MUST be lowercase. We do not do the conversion ourselves because it is not allowed in a const fn.
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const fn lesser_block_begin<'c>(current_name: &'c str) -> impl ContextMatcher + 'c {
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// TODO: Since this is a const fn, is there ANY way to "generate" functions at compile time?
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move |context, input: OrgSource<'_>| _lesser_block_begin(context, input, current_name)
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}
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#[cfg_attr(feature = "tracing", tracing::instrument(ret, level = "debug"))]
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fn _lesser_block_begin<'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)) = tuple((
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tag_no_case("#+begin_"),
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verify(name, |name: &OrgSource<'_>| {
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Into::<&str>::into(name).to_lowercase().as_str() == current_name_lower
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}),
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))(remaining)?;
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Ok((remaining, name))
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}
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