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Markdown parser fork with extended syntax for personal use.
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2.1 kB · 64 lines
Rust
at hack
1234567891011121314151617181920212223242526272829303132333435363738394041424344454647484950515253545556575859606162636465//! Label start (link) occurs in the [text][] content type.//!//! ## Grammar//!//! Label start (link) forms with the following BNF//! (<small>see [construct][crate::construct] for character groups</small>)://!//! ```bnf//! label_start_link ::= '['//! ```//!//! ## HTML//!//! Label start (link) does not, on its own, relate to anything in HTML.//! When matched with a [label end][label_end], they together relate to the//! `<a>` element in HTML.//! See [*§ 4.5.1 The `a` element*][html_a] in the HTML spec for more info.//! Without an end, the character (`[`) is output.//!//! ## Tokens//!//! * [`LabelLink`][Name::LabelLink]//! * [`LabelMarker`][Name::LabelMarker]//!//! ## References//!//! * [`label-start-link.js` in `micromark`](https://github.com/micromark/micromark/blob/main/packages/micromark-core-commonmark/dev/lib/label-start-link.js)//! * [*§ 6.3 Links* in `CommonMark`](https://spec.commonmark.org/0.31/#links)//!//! [text]: crate::construct::text//! [label_end]: crate::construct::label_end//! [html_a]: https://html.spec.whatwg.org/multipage/text-level-semantics.html#the-a-element
use crate::event::Name;use crate::resolve::Name as ResolveName;use crate::state::State;use crate::tokenizer::{LabelKind, LabelStart, Tokenizer};
/// Start of label (link) start.////// ```markdown/// > | a [b] c/// ^/// ```pub fn start(tokenizer: &mut Tokenizer) -> State { if tokenizer.parse_state.options.constructs.label_start_link && tokenizer.current == Some(b'[') { let start = tokenizer.events.len(); tokenizer.enter(Name::LabelLink); tokenizer.enter(Name::LabelMarker); tokenizer.consume(); tokenizer.exit(Name::LabelMarker); tokenizer.exit(Name::LabelLink); tokenizer.tokenize_state.label_starts.push(LabelStart { kind: LabelKind::Link, start: (start, tokenizer.events.len() - 1), inactive: false, }); tokenizer.register_resolver_before(ResolveName::Label); State::Ok } else { State::Nok }}