reprism/lib/languages/markdown.js

Modular Syntax highlighting for the web

'use strict';

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.default = {
  language: 'markdown',
  init: function init(Prism) {
    Prism.languages.markdown = Prism.languages.extend('markup', {});
    Prism.languages.insertBefore('markdown', 'prolog', {
      blockquote: {
        // > ...
        pattern: /^>(?:[\t ]*>)*/m,
        alias: 'punctuation'
      },
      code: [{
        // Prefixed by 4 spaces or 1 tab
        pattern: /^(?: {4}|\t).+/m,
        alias: 'keyword'
      }, {
        // `code`
        // ``code``
        pattern: /``.+?``|`[^`\n]+`/,
        alias: 'keyword'
      }],
      title: [{
        // title 1
        // =======

        // title 2
        // -------
        pattern: /\w+.*(?:\r?\n|\r)(?:==+|--+)/,
        alias: 'important',
        inside: {
          punctuation: /==+$|--+$/
        }
      }, {
        // # title 1
        // ###### title 6
        pattern: /(^\s*)#+.+/m,
        lookbehind: true,
        alias: 'important',
        inside: {
          punctuation: /^#+|#+$/
        }
      }],
      hr: {
        // ***
        // ---
        // * * *
        // -----------
        pattern: /(^\s*)([*-])(?:[\t ]*\2){2,}(?=\s*$)/m,
        lookbehind: true,
        alias: 'punctuation'
      },
      list: {
        // * item
        // + item
        // - item
        // 1. item
        pattern: /(^\s*)(?:[*+-]|\d+\.)(?=[\t ].)/m,
        lookbehind: true,
        alias: 'punctuation'
      },
      'url-reference': {
        // [id]: http://example.com "Optional title"
        // [id]: http://example.com 'Optional title'
        // [id]: http://example.com (Optional title)
        // [id]: <http://example.com> "Optional title"
        pattern: /!?\[[^\]]+\]:[\t ]+(?:\S+|<(?:\\.|[^>\\])+>)(?:[\t ]+(?:"(?:\\.|[^"\\])*"|'(?:\\.|[^'\\])*'|\((?:\\.|[^)\\])*\)))?/,
        inside: {
          variable: {
            pattern: /^(!?\[)[^\]]+/,
            lookbehind: true
          },
          string: /(?:"(?:\\.|[^"\\])*"|'(?:\\.|[^'\\])*'|\((?:\\.|[^)\\])*\))$/,
          punctuation: /^[\[\]!:]|[<>]/
        },
        alias: 'url'
      },
      bold: {
        // **strong**
        // __strong__

        // Allow only one line break
        pattern: /(^|[^\\])(\*\*|__)(?:(?:\r?\n|\r)(?!\r?\n|\r)|.)+?\2/,
        lookbehind: true,
        inside: {
          punctuation: /^\*\*|^__|\*\*$|__$/
        }
      },
      italic: {
        // *em*
        // _em_

        // Allow only one line break
        pattern: /(^|[^\\])([*_])(?:(?:\r?\n|\r)(?!\r?\n|\r)|.)+?\2/,
        lookbehind: true,
        inside: {
          punctuation: /^[*_]|[*_]$/
        }
      },
      url: {
        // [example](http://example.com "Optional title")
        // [example] [id]
        pattern: /!?\[[^\]]+\](?:\([^\s)]+(?:[\t ]+"(?:\\.|[^"\\])*")?\)| ?\[[^\]\n]*\])/,
        inside: {
          variable: {
            pattern: /(!?\[)[^\]]+(?=\]$)/,
            lookbehind: true
          },
          string: {
            pattern: /"(?:\\.|[^"\\])*"(?=\)$)/
          }
        }
      }
    });

    Prism.languages.markdown.bold.inside.url = Prism.languages.markdown.url;
    Prism.languages.markdown.italic.inside.url = Prism.languages.markdown.url;
    Prism.languages.markdown.bold.inside.italic = Prism.languages.markdown.italic;
    Prism.languages.markdown.italic.inside.bold = Prism.languages.markdown.bold;
  }
};