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/**
* @typedef {import('micromark-util-types').Construct} Construct
* @typedef {import('micromark-util-types').State} State
* @typedef {import('micromark-util-types').TokenizeContext} TokenizeContext
* @typedef {import('micromark-util-types').Tokenizer} Tokenizer
*/
import {labelEnd} from './label-end.js'
/** @type {Construct} */
export const labelStartImage = {
name: 'labelStartImage',
tokenize: tokenizeLabelStartImage,
resolveAll: labelEnd.resolveAll
}
/**
* @this {TokenizeContext}
* @type {Tokenizer}
*/
function tokenizeLabelStartImage(effects, ok, nok) {
const self = this
return start
/**
* Start of label (image) start.
*
* ```markdown
* > | a ![b] c
* ^
* ```
*
* @type {State}
*/
function start(code) {
effects.enter('labelImage')
effects.enter('labelImageMarker')
effects.consume(code)
effects.exit('labelImageMarker')
return open
}
/**
* After `!`, at `[`.
*
* ```markdown
* > | a ![b] c
* ^
* ```
*
* @type {State}
*/
function open(code) {
if (code === 91) {
effects.enter('labelMarker')
effects.consume(code)
effects.exit('labelMarker')
effects.exit('labelImage')
return after
}
return nok(code)
}
/**
* After `![`.
*
* ```markdown
* > | a ![b] c
* ^
* ```
*
* This is needed in because, when GFM footnotes are enabled, images never
* form when started with a `^`.
* Instead, links form:
*
* ```markdown
* 
*
* ![^a][b]
*
* [b]: c
* ```
*
* ```html
* <p>!<a href=\"b\">^a</a></p>
* <p>!<a href=\"c\">^a</a></p>
* ```
*
* @type {State}
*/
function after(code) {
// To do: use a new field to do this, this is still needed for
// `micromark-extension-gfm-footnote`, but the `label-start-link`
// behavior isn’t.
// Hidden footnotes hook.
/* c8 ignore next 3 */
return code === 94 && '_hiddenFootnoteSupport' in self.parser.constructs
? nok(code)
: ok(code)
}
}
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