🎉 initiate project *astro_rewrite*

node_modules/micromark-core-commonmark/lib/autolink.js

@@ -0,0 +1,235 @@
+/**
+ * @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 {
+  asciiAlpha,
+  asciiAlphanumeric,
+  asciiAtext,
+  asciiControl
+} from 'micromark-util-character'
+/** @type {Construct} */
+export const autolink = {
+  name: 'autolink',
+  tokenize: tokenizeAutolink
+}
+
+/**
+ * @this {TokenizeContext}
+ * @type {Tokenizer}
+ */
+function tokenizeAutolink(effects, ok, nok) {
+  let size = 0
+  return start
+
+  /**
+   * Start of an autolink.
+   *
+   * ```markdown
+   * > | a<https://example.com>b
+   *      ^
+   * > | a<user@example.com>b
+   *      ^
+   * ```
+   *
+   * @type {State}
+   */
+  function start(code) {
+    effects.enter('autolink')
+    effects.enter('autolinkMarker')
+    effects.consume(code)
+    effects.exit('autolinkMarker')
+    effects.enter('autolinkProtocol')
+    return open
+  }
+
+  /**
+   * After `<`, at protocol or atext.
+   *
+   * ```markdown
+   * > | a<https://example.com>b
+   *       ^
+   * > | a<user@example.com>b
+   *       ^
+   * ```
+   *
+   * @type {State}
+   */
+  function open(code) {
+    if (asciiAlpha(code)) {
+      effects.consume(code)
+      return schemeOrEmailAtext
+    }
+    return emailAtext(code)
+  }
+
+  /**
+   * At second byte of protocol or atext.
+   *
+   * ```markdown
+   * > | a<https://example.com>b
+   *        ^
+   * > | a<user@example.com>b
+   *        ^
+   * ```
+   *
+   * @type {State}
+   */
+  function schemeOrEmailAtext(code) {
+    // ASCII alphanumeric and `+`, `-`, and `.`.
+    if (code === 43 || code === 45 || code === 46 || asciiAlphanumeric(code)) {
+      // Count the previous alphabetical from `open` too.
+      size = 1
+      return schemeInsideOrEmailAtext(code)
+    }
+    return emailAtext(code)
+  }
+
+  /**
+   * In ambiguous protocol or atext.
+   *
+   * ```markdown
+   * > | a<https://example.com>b
+   *        ^
+   * > | a<user@example.com>b
+   *        ^
+   * ```
+   *
+   * @type {State}
+   */
+  function schemeInsideOrEmailAtext(code) {
+    if (code === 58) {
+      effects.consume(code)
+      size = 0
+      return urlInside
+    }
+
+    // ASCII alphanumeric and `+`, `-`, and `.`.
+    if (
+      (code === 43 || code === 45 || code === 46 || asciiAlphanumeric(code)) &&
+      size++ < 32
+    ) {
+      effects.consume(code)
+      return schemeInsideOrEmailAtext
+    }
+    size = 0
+    return emailAtext(code)
+  }
+
+  /**
+   * After protocol, in URL.
+   *
+   * ```markdown
+   * > | a<https://example.com>b
+   *             ^
+   * ```
+   *
+   * @type {State}
+   */
+  function urlInside(code) {
+    if (code === 62) {
+      effects.exit('autolinkProtocol')
+      effects.enter('autolinkMarker')
+      effects.consume(code)
+      effects.exit('autolinkMarker')
+      effects.exit('autolink')
+      return ok
+    }
+
+    // ASCII control, space, or `<`.
+    if (code === null || code === 32 || code === 60 || asciiControl(code)) {
+      return nok(code)
+    }
+    effects.consume(code)
+    return urlInside
+  }
+
+  /**
+   * In email atext.
+   *
+   * ```markdown
+   * > | a<user.name@example.com>b
+   *              ^
+   * ```
+   *
+   * @type {State}
+   */
+  function emailAtext(code) {
+    if (code === 64) {
+      effects.consume(code)
+      return emailAtSignOrDot
+    }
+    if (asciiAtext(code)) {
+      effects.consume(code)
+      return emailAtext
+    }
+    return nok(code)
+  }
+
+  /**
+   * In label, after at-sign or dot.
+   *
+   * ```markdown
+   * > | a<user.name@example.com>b
+   *                 ^       ^
+   * ```
+   *
+   * @type {State}
+   */
+  function emailAtSignOrDot(code) {
+    return asciiAlphanumeric(code) ? emailLabel(code) : nok(code)
+  }
+
+  /**
+   * In label, where `.` and `>` are allowed.
+   *
+   * ```markdown
+   * > | a<user.name@example.com>b
+   *                   ^
+   * ```
+   *
+   * @type {State}
+   */
+  function emailLabel(code) {
+    if (code === 46) {
+      effects.consume(code)
+      size = 0
+      return emailAtSignOrDot
+    }
+    if (code === 62) {
+      // Exit, then change the token type.
+      effects.exit('autolinkProtocol').type = 'autolinkEmail'
+      effects.enter('autolinkMarker')
+      effects.consume(code)
+      effects.exit('autolinkMarker')
+      effects.exit('autolink')
+      return ok
+    }
+    return emailValue(code)
+  }
+
+  /**
+   * In label, where `.` and `>` are *not* allowed.
+   *
+   * Though, this is also used in `emailLabel` to parse other values.
+   *
+   * ```markdown
+   * > | a<user.name@ex-ample.com>b
+   *                    ^
+   * ```
+   *
+   * @type {State}
+   */
+  function emailValue(code) {
+    // ASCII alphanumeric or `-`.
+    if ((code === 45 || asciiAlphanumeric(code)) && size++ < 63) {
+      const next = code === 45 ? emailValue : emailLabel
+      effects.consume(code)
+      return next
+    }
+    return nok(code)
+  }
+}