crashkeys.dev
Markdown parser fork with extended syntax for personal use.
1//! The string content type.
2//!
3//! **String** is a limited [text][] like content type which only allows
4//! character escapes and character references.
5//! It exists in things such as identifiers (media references, definitions),
6//! titles, URLs, code (fenced) info and meta parts.
7//!
8//! The constructs found in string are:
9//!
10//! * [Character escape][crate::construct::character_escape]
11//! * [Character reference][crate::construct::character_reference]
12//!
13//! [text]: crate::construct::text
14
15use crate::construct::partial_whitespace::resolve_whitespace;
16use crate::resolve::Name as ResolveName;
17use crate::state::{Name as StateName, State};
18use crate::subtokenize::Subresult;
19use crate::tokenizer::Tokenizer;
20
21/// Characters that can start something in string.
22const MARKERS: [u8; 2] = [b'&', b'\\'];
23
24/// Start of string.
25///
26/// ````markdown
27/// > | ```js
28/// ^
29/// ````
30pub fn start(tokenizer: &mut Tokenizer) -> State {
31 tokenizer.tokenize_state.markers = &MARKERS;
32 State::Retry(StateName::StringBefore)
33}
34
35/// Before string.
36///
37/// ````markdown
38/// > | ```js
39/// ^
40/// ````
41pub fn before(tokenizer: &mut Tokenizer) -> State {
42 match tokenizer.current {
43 None => {
44 tokenizer.register_resolver(ResolveName::Data);
45 tokenizer.register_resolver(ResolveName::String);
46 State::Ok
47 }
48 Some(b'&') => {
49 tokenizer.attempt(
50 State::Next(StateName::StringBefore),
51 State::Next(StateName::StringBeforeData),
52 );
53 State::Retry(StateName::CharacterReferenceStart)
54 }
55 Some(b'\\') => {
56 tokenizer.attempt(
57 State::Next(StateName::StringBefore),
58 State::Next(StateName::StringBeforeData),
59 );
60 State::Retry(StateName::CharacterEscapeStart)
61 }
62 _ => State::Retry(StateName::StringBeforeData),
63 }
64}
65
66/// At data.
67///
68/// ````markdown
69/// > | ```js
70/// ^
71/// ````
72pub fn before_data(tokenizer: &mut Tokenizer) -> State {
73 tokenizer.attempt(State::Next(StateName::StringBefore), State::Nok);
74 State::Retry(StateName::DataStart)
75}
76
77/// Resolve whitespace in string.
78pub fn resolve(tokenizer: &mut Tokenizer) -> Option<Subresult> {
79 resolve_whitespace(tokenizer, false, false);
80 None
81}