Prism.languages.markup = {
  comment: {
    pattern: /<!--(?:(?!<!--)[\s\S])*?-->/,
    greedy: true,
  },
  prolog: {
    pattern: /<\?[\s\S]+?\?>/,
    greedy: true,
  },
  doctype: {
    // https://www.w3.org/TR/xml/#NT-doctypedecl
    pattern:
      /<!DOCTYPE(?:[^>"'[\]]|"[^"]*"|'[^']*')+(?:\[(?:[^<"'\]]|"[^"]*"|'[^']*'|<(?!!--)|<!--(?:[^-]|-(?!->))*-->)*\]\s*)?>/i,
    greedy: true,
    inside: {
      'internal-subset': {
        pattern: /(^[^\[]*\[)[\s\S]+(?=\]>$)/,
        lookbehind: true,
        greedy: true,
        inside: null, // see below
      },
      string: {
        pattern: /"[^"]*"|'[^']*'/,
        greedy: true,
      },
      punctuation: /^<!|>$|[[\]]/,
      'doctype-tag': /^DOCTYPE/i,
      name: /[^\s<>'"]+/,
    },
  },
  cdata: {
    pattern: /<!\[CDATA\[[\s\S]*?\]\]>/i,
    greedy: true,
  },
  tag: {
    pattern:
      /<\/?(?!\d)[^\s>\/=$<%]+(?:\s(?:\s*[^\s>\/=]+(?:\s*=\s*(?:"[^"]*"|'[^']*'|[^\s'">=]+(?=[\s>]))|(?=[\s/>])))+)?\s*\/?>/,
    greedy: true,
    inside: {
      tag: {
        pattern: /^<\/?[^\s>\/]+/,
        inside: {
          punctuation: /^<\/?/,
          namespace: /^[^\s>\/:]+:/,
        },
      },
      'special-attr': [],
      'attr-value': {
        pattern: /=\s*(?:"[^"]*"|'[^']*'|[^\s'">=]+)/,
        inside: {
          punctuation: [
            {
              pattern: /^=/,
              alias: 'attr-equals',
            },
            /"|'/,
          ],
        },
      },
      punctuation: /\/?>/,
      'attr-name': {
        pattern: /[^\s>\/]+/,
        inside: {
          namespace: /^[^\s>\/:]+:/,
        },
      },
    },
  },
  entity: [
    {
      pattern: /&[\da-z]{1,8};/i,
      alias: 'named-entity',
    },
    /&#x?[\da-f]{1,8};/i,
  ],
};

Prism.languages.markup['tag'].inside['attr-value'].inside['entity'] =
  Prism.languages.markup['entity'];
Prism.languages.markup['doctype'].inside['internal-subset'].inside =
  Prism.languages.markup;

// Plugin to make entity title show the real entity, idea by Roman Komarov
Prism.hooks.add('wrap', function (env) {
  if (env.type === 'entity') {
    env.attributes['title'] = env.content.replace(/&amp;/, '&');
  }
});

Object.defineProperty(Prism.languages.markup.tag, 'addInlined', {
  /**
   * Adds an inlined language to markup.
   *
   * An example of an inlined language is CSS with `<style>` tags.
   *
   * @param {string} tagName The name of the tag that contains the inlined language. This name will be treated as
   * case insensitive.
   * @param {string} lang The language key.
   * @example
   * addInlined('style', 'css');
   */
  value: function addInlined(tagName, lang) {
    var includedCdataInside = {};
    includedCdataInside['language-' + lang] = {
      pattern: /(^<!\[CDATA\[)[\s\S]+?(?=\]\]>$)/i,
      lookbehind: true,
      inside: Prism.languages[lang],
    };
    includedCdataInside['cdata'] = /^<!\[CDATA\[|\]\]>$/i;

    var inside = {
      'included-cdata': {
        pattern: /<!\[CDATA\[[\s\S]*?\]\]>/i,
        inside: includedCdataInside,
      },
    };
    inside['language-' + lang] = {
      pattern: /[\s\S]+/,
      inside: Prism.languages[lang],
    };

    var def = {};
    def[tagName] = {
      pattern: RegExp(
        /(<__[^>]*>)(?:<!\[CDATA\[(?:[^\]]|\](?!\]>))*\]\]>|(?!<!\[CDATA\[)[\s\S])*?(?=<\/__>)/.source.replace(
          /__/g,
          function () {
            return tagName;
          }
        ),
        'i'
      ),
      lookbehind: true,
      greedy: true,
      inside: inside,
    };

    Prism.languages.insertBefore('markup', 'cdata', def);
  },
});
Object.defineProperty(Prism.languages.markup.tag, 'addAttribute', {
  /**
   * Adds an pattern to highlight languages embedded in HTML attributes.
   *
   * An example of an inlined language is CSS with `style` attributes.
   *
   * @param {string} attrName The name of the tag that contains the inlined language. This name will be treated as
   * case insensitive.
   * @param {string} lang The language key.
   * @example
   * addAttribute('style', 'css');
   */
  value: function (attrName, lang) {
    Prism.languages.markup.tag.inside['special-attr'].push({
      pattern: RegExp(
        /(^|["'\s])/.source +
          '(?:' +
          attrName +
          ')' +
          /\s*=\s*(?:"[^"]*"|'[^']*'|[^\s'">=]+(?=[\s>]))/.source,
        'i'
      ),
      lookbehind: true,
      inside: {
        'attr-name': /^[^\s=]+/,
        'attr-value': {
          pattern: /=[\s\S]+/,
          inside: {
            value: {
              pattern: /(^=\s*(["']|(?!["'])))\S[\s\S]*(?=\2$)/,
              lookbehind: true,
              alias: [lang, 'language-' + lang],
              inside: Prism.languages[lang],
            },
            punctuation: [
              {
                pattern: /^=/,
                alias: 'attr-equals',
              },
              /"|'/,
            ],
          },
        },
      },
    });
  },
});

Prism.languages.html = Prism.languages.markup;
Prism.languages.mathml = Prism.languages.markup;
Prism.languages.svg = Prism.languages.markup;

Prism.languages.xml = Prism.languages.extend('markup', {});
Prism.languages.ssml = Prism.languages.xml;
Prism.languages.atom = Prism.languages.xml;
Prism.languages.rss = Prism.languages.xml;