| /** | |
| * @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 {codes} from 'micromark-util-symbol/codes.js' | |
| import {types} from 'micromark-util-symbol/types.js' | |
| import {ok as assert} from 'uvu/assert' | |
| 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) { | |
| assert(code === codes.exclamationMark, 'expected `!`') | |
| effects.enter(types.labelImage) | |
| effects.enter(types.labelImageMarker) | |
| effects.consume(code) | |
| effects.exit(types.labelImageMarker) | |
| return open | |
| } | |
| /** | |
| * After `!`, at `[`. | |
| * | |
| * ```markdown | |
| * > | a ![b] c | |
| * ^ | |
| * ``` | |
| * | |
| * @type {State} | |
| */ | |
| function open(code) { | |
| if (code === codes.leftSquareBracket) { | |
| effects.enter(types.labelMarker) | |
| effects.consume(code) | |
| effects.exit(types.labelMarker) | |
| effects.exit(types.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 === codes.caret && | |
| '_hiddenFootnoteSupport' in self.parser.constructs | |
| ? nok(code) | |
| : ok(code) | |
| } | |
| } | |