planning

node_modules/micromark/lib/tokenize/character-reference.js

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+'use strict'
+
+var assert = require('assert')
+var decodeEntity = require('parse-entities/decode-entity.js')
+var asciiAlphanumeric = require('../character/ascii-alphanumeric.js')
+var asciiDigit = require('../character/ascii-digit.js')
+var asciiHexDigit = require('../character/ascii-hex-digit.js')
+var codes = require('../character/codes.js')
+var constants = require('../constant/constants.js')
+var types = require('../constant/types.js')
+
+function _interopDefaultLegacy(e) {
+  return e && typeof e === 'object' && 'default' in e ? e : {default: e}
+}
+
+var assert__default = /*#__PURE__*/ _interopDefaultLegacy(assert)
+var decodeEntity__default = /*#__PURE__*/ _interopDefaultLegacy(decodeEntity)
+
+var characterReference = {
+  name: 'characterReference',
+  tokenize: tokenizeCharacterReference
+}
+
+function tokenizeCharacterReference(effects, ok, nok) {
+  var self = this
+  var size = 0
+  var max
+  var test
+
+  return start
+
+  function start(code) {
+    assert__default['default'](code === codes.ampersand, 'expected `&`')
+    effects.enter(types.characterReference)
+    effects.enter(types.characterReferenceMarker)
+    effects.consume(code)
+    effects.exit(types.characterReferenceMarker)
+    return open
+  }
+
+  function open(code) {
+    if (code === codes.numberSign) {
+      effects.enter(types.characterReferenceMarkerNumeric)
+      effects.consume(code)
+      effects.exit(types.characterReferenceMarkerNumeric)
+      return numeric
+    }
+
+    effects.enter(types.characterReferenceValue)
+    max = constants.characterReferenceNamedSizeMax
+    test = asciiAlphanumeric
+    return value(code)
+  }
+
+  function numeric(code) {
+    if (code === codes.uppercaseX || code === codes.lowercaseX) {
+      effects.enter(types.characterReferenceMarkerHexadecimal)
+      effects.consume(code)
+      effects.exit(types.characterReferenceMarkerHexadecimal)
+      effects.enter(types.characterReferenceValue)
+      max = constants.characterReferenceHexadecimalSizeMax
+      test = asciiHexDigit
+      return value
+    }
+
+    effects.enter(types.characterReferenceValue)
+    max = constants.characterReferenceDecimalSizeMax
+    test = asciiDigit
+    return value(code)
+  }
+
+  function value(code) {
+    var token
+
+    if (code === codes.semicolon && size) {
+      token = effects.exit(types.characterReferenceValue)
+
+      if (
+        test === asciiAlphanumeric &&
+        !decodeEntity__default['default'](self.sliceSerialize(token))
+      ) {
+        return nok(code)
+      }
+
+      effects.enter(types.characterReferenceMarker)
+      effects.consume(code)
+      effects.exit(types.characterReferenceMarker)
+      effects.exit(types.characterReference)
+      return ok
+    }
+
+    if (test(code) && size++ < max) {
+      effects.consume(code)
+      return value
+    }
+
+    return nok(code)
+  }
+}
+
+module.exports = characterReference