🎉 initiate project *astro_rewrite*

node_modules/micromark-core-commonmark/dev/lib/label-start-image.js

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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 {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)
+   *
+   * ![^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)
+  }
+}