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//! The string content type.
//!
//! **String** is a limited [text][] like content type which only allows
//! character escapes and character references.
//! It exists in things such as identifiers (media references, definitions),
//! titles, URLs, code (fenced) info and meta parts.
//!
//! The constructs found in string are:
//!
//! * [Character escape][crate::construct::character_escape]
//! * [Character reference][crate::construct::character_reference]
//!
//! [text]: crate::content::text
use crate::construct::{
character_escape::start as character_escape, character_reference::start as character_reference,
partial_data::start as data, partial_whitespace::whitespace,
};
use crate::tokenizer::{Code, State, StateFnResult, Tokenizer};
const MARKERS: [Code; 5] = [
Code::VirtualSpace, // `whitespace`
Code::Char('\t'), // `whitespace`
Code::Char(' '), // `whitespace`
Code::Char('&'), // `character_reference`
Code::Char('\\'), // `character_escape`
];
/// Before string.
///
/// ```markdown
/// |&
/// |\&
/// |qwe
/// ```
pub fn start(tokenizer: &mut Tokenizer, code: Code) -> StateFnResult {
match code {
Code::None => (State::Ok, None),
_ => tokenizer.attempt_n(
vec![
Box::new(character_reference),
Box::new(character_escape),
Box::new(whitespace),
],
|ok| Box::new(if ok { start } else { before_data }),
)(tokenizer, code),
}
}
/// At data.
///
/// ```markdown
/// |qwe
/// ```
fn before_data(tokenizer: &mut Tokenizer, code: Code) -> StateFnResult {
tokenizer.go(|t, c| data(t, c, MARKERS.to_vec()), start)(tokenizer, code)
}
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