563 lines
21 KiB
Rust
563 lines
21 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;
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use nom::bytes::complete::tag_no_case;
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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::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::map;
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use nom::combinator::opt;
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use nom::combinator::peek;
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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::multi::separated_list0;
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use nom::multi::separated_list1;
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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::CharOffsetInLine;
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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::LineNumber;
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use crate::types::Object;
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use crate::types::PlainText;
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use crate::types::RetainLabels;
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use crate::types::SrcBlock;
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use crate::types::SwitchNumberLines;
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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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pub(crate) 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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pub(crate) 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 (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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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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pub(crate) 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, example_switches)))(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 = parameters.map(|(_, parameters)| parameters);
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let (remaining, contents) = content(&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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let (switches, number_lines, retain_labels, use_labels, label_format) = {
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if let Some(parameters) = parameters {
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(
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if parameters.source.len() == 0 {
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None
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} else {
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Some(parameters.source)
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},
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parameters.number_lines,
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parameters.retain_labels,
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parameters.use_labels,
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parameters.label_format,
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)
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} else {
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(None, None, RetainLabels::Yes, true, None)
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}
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};
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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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switches,
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number_lines,
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retain_labels,
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use_labels,
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label_format,
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contents,
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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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pub(crate) 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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pub(crate) 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, src_switches)))(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) = content(&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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let (switches, language, number_lines, retain_labels, use_labels, label_format) = {
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if let Some(parameters) = parameters {
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(
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if parameters.source.len() == 0 {
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None
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} else {
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Some(parameters.source)
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},
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parameters.language,
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parameters.number_lines,
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parameters.retain_labels,
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parameters.use_labels,
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parameters.label_format,
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)
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} else {
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(None, None, None, RetainLabels::Yes, true, None)
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}
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};
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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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switches,
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language,
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number_lines,
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retain_labels,
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use_labels,
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label_format,
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contents,
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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<'c>(current_name: &'c str) -> impl ContextMatcher + 'c {
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// Since the lesser block names are statically defined in code, we can simply assert that the name is lowercase instead of causing an allocation by converting to lowercase.
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debug_assert!(current_name == current_name.to_lowercase());
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move |context, input: OrgSource<'_>| _lesser_block_end(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_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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#[derive(Debug)]
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struct ExampleSrcSwitches<'s> {
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source: &'s str,
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language: Option<&'s str>,
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number_lines: Option<SwitchNumberLines>,
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retain_labels: RetainLabels,
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use_labels: bool,
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label_format: Option<&'s str>,
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}
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#[derive(Debug)]
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enum SwitchState {
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Normal,
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NewLineNumber,
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ContinuedLineNumber,
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LabelFormat,
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}
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#[cfg_attr(feature = "tracing", tracing::instrument(ret, level = "debug"))]
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fn src_switches<'s>(input: OrgSource<'s>) -> Res<OrgSource<'s>, ExampleSrcSwitches<'s>> {
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example_src_switches(true)(input)
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}
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#[cfg_attr(feature = "tracing", tracing::instrument(ret, level = "debug"))]
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fn example_switches<'s>(input: OrgSource<'s>) -> Res<OrgSource<'s>, ExampleSrcSwitches<'s>> {
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let (remaining, switches) = example_src_switches(false)(input)?;
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debug_assert!(switches.language.is_none());
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Ok((remaining, switches))
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}
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fn example_src_switches(
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grab_language: bool,
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) -> impl for<'s> Fn(OrgSource<'s>) -> Res<OrgSource<'s>, ExampleSrcSwitches<'s>> {
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move |input| _example_src_switches(input, grab_language)
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}
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#[cfg_attr(feature = "tracing", tracing::instrument(ret, level = "debug"))]
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fn _example_src_switches<'s>(
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input: OrgSource<'s>,
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grab_language: bool,
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) -> Res<OrgSource<'s>, ExampleSrcSwitches<'s>> {
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let mut number_lines = None;
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let mut retain_labels = RetainLabels::Yes;
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let mut use_labels = true;
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let mut label_format = None;
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let mut saw_r = false;
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let mut language = None;
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let remaining = if grab_language {
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let (remain, first_word) = opt(map(tuple((switch_word, space0)), |(word, _)| word))(input)?;
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language = first_word.map(Into::<&str>::into);
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remain
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} else {
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input
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};
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let (remaining, (source, (words, _))) = if language.is_none() {
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consumed(tuple((separated_list1(space1, switch_word), space0)))(remaining)?
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} else {
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consumed(tuple((separated_list0(space1, switch_word), space0)))(remaining)?
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};
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let mut state = SwitchState::Normal;
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for word in words {
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let normalized_word = Into::<&str>::into(word);
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loop {
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match (&state, normalized_word) {
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(SwitchState::Normal, "-n") => {
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state = SwitchState::NewLineNumber;
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}
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(SwitchState::Normal, "+n") => {
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state = SwitchState::ContinuedLineNumber;
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}
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(SwitchState::Normal, "-r") => {
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saw_r = true;
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use_labels = false;
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match retain_labels {
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RetainLabels::Yes => {
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retain_labels = RetainLabels::No;
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}
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_ => {}
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}
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}
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(SwitchState::Normal, "-l") => {
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state = SwitchState::LabelFormat;
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}
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(SwitchState::Normal, "-k") => {
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use_labels = false;
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let text_until_flag = input.get_until(word);
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let character_offset = Into::<&str>::into(text_until_flag).chars().count();
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let character_offset = CharOffsetInLine::try_from(character_offset)
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.expect("Character offset should fit in CharOffsetInLine");
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retain_labels = RetainLabels::Keep(character_offset);
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}
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(SwitchState::NewLineNumber, _) => {
|
|
let val = normalized_word.parse::<LineNumber>();
|
|
if let Ok(val) = val {
|
|
if val < 0 {
|
|
number_lines = Some(SwitchNumberLines::New(0));
|
|
} else {
|
|
// Note that this can result in a negative 1 if the val is originally 0.
|
|
number_lines = Some(SwitchNumberLines::New(val - 1));
|
|
}
|
|
state = SwitchState::Normal;
|
|
} else {
|
|
number_lines = Some(SwitchNumberLines::New(0));
|
|
state = SwitchState::Normal;
|
|
continue; // Re-processes the word
|
|
}
|
|
}
|
|
(SwitchState::ContinuedLineNumber, _) => {
|
|
let val = normalized_word.parse::<LineNumber>();
|
|
if let Ok(val) = val {
|
|
if val < 0 {
|
|
number_lines = Some(SwitchNumberLines::Continued(0));
|
|
} else {
|
|
// Note that this can result in a negative 1 if the val is originally 0.
|
|
number_lines = Some(SwitchNumberLines::Continued(val - 1));
|
|
}
|
|
state = SwitchState::Normal;
|
|
} else {
|
|
number_lines = Some(SwitchNumberLines::Continued(0));
|
|
state = SwitchState::Normal;
|
|
continue; // Re-processes the word
|
|
}
|
|
}
|
|
(SwitchState::LabelFormat, _) => {
|
|
label_format = Some(normalized_word);
|
|
state = SwitchState::Normal;
|
|
}
|
|
(SwitchState::Normal, _) => {}
|
|
};
|
|
break;
|
|
}
|
|
}
|
|
|
|
let retain_labels = match retain_labels {
|
|
RetainLabels::Keep(_) if !saw_r => RetainLabels::Yes,
|
|
_ => retain_labels,
|
|
};
|
|
|
|
Ok((
|
|
remaining,
|
|
ExampleSrcSwitches {
|
|
source: Into::<&str>::into(source),
|
|
language,
|
|
number_lines,
|
|
retain_labels,
|
|
use_labels,
|
|
label_format,
|
|
},
|
|
))
|
|
}
|
|
|
|
#[cfg_attr(feature = "tracing", tracing::instrument(ret, level = "debug"))]
|
|
fn switch_word<'s>(input: OrgSource<'s>) -> Res<OrgSource<'s>, OrgSource<'s>> {
|
|
alt((
|
|
map(
|
|
tuple((tag(r#"""#), is_not("\"\r\n"), tag(r#"""#))),
|
|
|(_, contents, _)| contents,
|
|
),
|
|
is_not(" \t\r\n"),
|
|
))(input)
|
|
}
|
|
|
|
#[cfg_attr(feature = "tracing", tracing::instrument(ret, level = "debug"))]
|
|
pub(crate) fn content<'b, 'g, 'r, 's>(
|
|
context: RefContext<'b, 'g, 'r, 's>,
|
|
input: OrgSource<'s>,
|
|
) -> Res<OrgSource<'s>, String> {
|
|
let mut ret = String::new();
|
|
let mut remaining = input;
|
|
let exit_matcher_parser = parser_with_context!(exit_matcher_parser)(context);
|
|
loop {
|
|
if exit_matcher_parser(remaining).is_ok() {
|
|
break;
|
|
}
|
|
|
|
let (remain, (pre_escape_whitespace, line)) = content_line(remaining)?;
|
|
pre_escape_whitespace.map(|val| ret.push_str(Into::<&str>::into(val)));
|
|
ret.push_str(line.into());
|
|
remaining = remain;
|
|
}
|
|
|
|
Ok((remaining, ret))
|
|
}
|
|
|
|
#[cfg_attr(feature = "tracing", tracing::instrument(ret, level = "debug"))]
|
|
fn content_line<'s>(
|
|
input: OrgSource<'s>,
|
|
) -> Res<OrgSource<'s>, (Option<OrgSource<'s>>, OrgSource<'s>)> {
|
|
let (remaining, pre_escape_whitespace) = opt(map(
|
|
tuple((
|
|
recognize(tuple((
|
|
space0,
|
|
many_till(
|
|
tag(","),
|
|
peek(tuple((tag(","), alt((tag("#+"), tag("*")))))),
|
|
),
|
|
))),
|
|
tag(","),
|
|
)),
|
|
|(pre_comma, _)| pre_comma,
|
|
))(input)?;
|
|
let (remaining, line_post_escape) = recognize(many_till(anychar, line_ending))(remaining)?;
|
|
Ok((remaining, (pre_escape_whitespace, line_post_escape)))
|
|
}
|