| 1 | 'use strict'
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| 2 |
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| 3 | module.exports = markdown
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| 4 | markdown.displayName = 'markdown'
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| 5 | markdown.aliases = ['md']
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| 6 | function markdown(Prism) {
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| 7 | ;(function (Prism) {
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| 8 | // Allow only one line break
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| 9 | var inner = /(?:\\.|[^\\\n\r]|(?:\n|\r\n?)(?![\r\n]))/.source
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| 10 | /**
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| 11 | * This function is intended for the creation of the bold or italic pattern.
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| 12 | *
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| 13 | * This also adds a lookbehind group to the given pattern to ensure that the pattern is not backslash-escaped.
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| 14 | *
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| 15 | * _Note:_ Keep in mind that this adds a capturing group.
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| 16 | *
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| 17 | * @param {string} pattern
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| 18 | * @returns {RegExp}
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| 19 | */
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| 20 | function createInline(pattern) {
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| 21 | pattern = pattern.replace(/<inner>/g, function () {
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| 22 | return inner
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| 23 | })
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| 24 | return RegExp(/((?:^|[^\\])(?:\\{2})*)/.source + '(?:' + pattern + ')')
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| 25 | }
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| 26 | var tableCell = /(?:\\.|``(?:[^`\r\n]|`(?!`))+``|`[^`\r\n]+`|[^\\|\r\n`])+/
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| 27 | .source
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| 28 | var tableRow =
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| 29 | /\|?__(?:\|__)+\|?(?:(?:\n|\r\n?)|(?![\s\S]))/.source.replace(
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| 30 | /__/g,
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| 31 | function () {
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| 32 | return tableCell
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| 33 | }
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| 34 | )
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| 35 | var tableLine =
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| 36 | /\|?[ \t]*:?-{3,}:?[ \t]*(?:\|[ \t]*:?-{3,}:?[ \t]*)+\|?(?:\n|\r\n?)/
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| 37 | .source
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| 38 | Prism.languages.markdown = Prism.languages.extend('markup', {})
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| 39 | Prism.languages.insertBefore('markdown', 'prolog', {
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| 40 | 'front-matter-block': {
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| 41 | pattern: /(^(?:\s*[\r\n])?)---(?!.)[\s\S]*?[\r\n]---(?!.)/,
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| 42 | lookbehind: true,
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| 43 | greedy: true,
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| 44 | inside: {
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| 45 | punctuation: /^---|---$/,
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| 46 | 'front-matter': {
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| 47 | pattern: /\S+(?:\s+\S+)*/,
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| 48 | alias: ['yaml', 'language-yaml'],
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| 49 | inside: Prism.languages.yaml
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| 50 | }
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| 51 | }
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| 52 | },
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| 53 | blockquote: {
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| 54 | // > ...
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| 55 | pattern: /^>(?:[\t ]*>)*/m,
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| 56 | alias: 'punctuation'
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| 57 | },
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| 58 | table: {
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| 59 | pattern: RegExp(
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| 60 | '^' + tableRow + tableLine + '(?:' + tableRow + ')*',
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| 61 | 'm'
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| 62 | ),
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| 63 | inside: {
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| 64 | 'table-data-rows': {
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| 65 | pattern: RegExp(
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| 66 | '^(' + tableRow + tableLine + ')(?:' + tableRow + ')*$'
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| 67 | ),
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| 68 | lookbehind: true,
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| 69 | inside: {
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| 70 | 'table-data': {
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| 71 | pattern: RegExp(tableCell),
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| 72 | inside: Prism.languages.markdown
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| 73 | },
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| 74 | punctuation: /\|/
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| 75 | }
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| 76 | },
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| 77 | 'table-line': {
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| 78 | pattern: RegExp('^(' + tableRow + ')' + tableLine + '$'),
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| 79 | lookbehind: true,
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| 80 | inside: {
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| 81 | punctuation: /\||:?-{3,}:?/
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| 82 | }
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| 83 | },
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| 84 | 'table-header-row': {
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| 85 | pattern: RegExp('^' + tableRow + '$'),
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| 86 | inside: {
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| 87 | 'table-header': {
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| 88 | pattern: RegExp(tableCell),
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| 89 | alias: 'important',
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| 90 | inside: Prism.languages.markdown
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| 91 | },
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| 92 | punctuation: /\|/
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| 93 | }
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| 94 | }
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| 95 | }
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| 96 | },
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| 97 | code: [
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| 98 | {
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| 99 | // Prefixed by 4 spaces or 1 tab and preceded by an empty line
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| 100 | pattern:
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| 101 | /((?:^|\n)[ \t]*\n|(?:^|\r\n?)[ \t]*\r\n?)(?: {4}|\t).+(?:(?:\n|\r\n?)(?: {4}|\t).+)*/,
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| 102 | lookbehind: true,
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| 103 | alias: 'keyword'
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| 104 | },
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| 105 | {
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| 106 | // ```optional language
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| 107 | // code block
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| 108 | // ```
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| 109 | pattern: /^```[\s\S]*?^```$/m,
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| 110 | greedy: true,
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| 111 | inside: {
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| 112 | 'code-block': {
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| 113 | pattern: /^(```.*(?:\n|\r\n?))[\s\S]+?(?=(?:\n|\r\n?)^```$)/m,
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| 114 | lookbehind: true
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| 115 | },
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| 116 | 'code-language': {
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| 117 | pattern: /^(```).+/,
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| 118 | lookbehind: true
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| 119 | },
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| 120 | punctuation: /```/
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| 121 | }
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| 122 | }
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| 123 | ],
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| 124 | title: [
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| 125 | {
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| 126 | // title 1
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| 127 | // =======
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| 128 | // title 2
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| 129 | // -------
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| 130 | pattern: /\S.*(?:\n|\r\n?)(?:==+|--+)(?=[ \t]*$)/m,
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| 131 | alias: 'important',
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| 132 | inside: {
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| 133 | punctuation: /==+$|--+$/
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| 134 | }
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| 135 | },
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| 136 | {
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| 137 | // # title 1
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| 138 | // ###### title 6
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| 139 | pattern: /(^\s*)#.+/m,
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| 140 | lookbehind: true,
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| 141 | alias: 'important',
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| 142 | inside: {
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| 143 | punctuation: /^#+|#+$/
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| 144 | }
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| 145 | }
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| 146 | ],
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| 147 | hr: {
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| 148 | // ***
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| 149 | // ---
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| 150 | // * * *
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| 151 | // -----------
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| 152 | pattern: /(^\s*)([*-])(?:[\t ]*\2){2,}(?=\s*$)/m,
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| 153 | lookbehind: true,
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| 154 | alias: 'punctuation'
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| 155 | },
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| 156 | list: {
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| 157 | // * item
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| 158 | // + item
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| 159 | // - item
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| 160 | // 1. item
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| 161 | pattern: /(^\s*)(?:[*+-]|\d+\.)(?=[\t ].)/m,
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| 162 | lookbehind: true,
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| 163 | alias: 'punctuation'
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| 164 | },
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| 165 | 'url-reference': {
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| 166 | // [id]: http://example.com "Optional title"
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| 167 | // [id]: http://example.com 'Optional title'
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| 168 | // [id]: http://example.com (Optional title)
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| 169 | // [id]: <http://example.com> "Optional title"
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| 170 | pattern:
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| 171 | /!?\[[^\]]+\]:[\t ]+(?:\S+|<(?:\\.|[^>\\])+>)(?:[\t ]+(?:"(?:\\.|[^"\\])*"|'(?:\\.|[^'\\])*'|\((?:\\.|[^)\\])*\)))?/,
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| 172 | inside: {
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| 173 | variable: {
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| 174 | pattern: /^(!?\[)[^\]]+/,
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| 175 | lookbehind: true
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| 176 | },
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| 177 | string:
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| 178 | /(?:"(?:\\.|[^"\\])*"|'(?:\\.|[^'\\])*'|\((?:\\.|[^)\\])*\))$/,
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| 179 | punctuation: /^[\[\]!:]|[<>]/
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| 180 | },
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| 181 | alias: 'url'
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| 182 | },
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| 183 | bold: {
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| 184 | // **strong**
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| 185 | // __strong__
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| 186 | // allow one nested instance of italic text using the same delimiter
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| 187 | pattern: createInline(
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| 188 | /\b__(?:(?!_)<inner>|_(?:(?!_)<inner>)+_)+__\b|\*\*(?:(?!\*)<inner>|\*(?:(?!\*)<inner>)+\*)+\*\*/
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| 189 | .source
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| 190 | ),
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| 191 | lookbehind: true,
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| 192 | greedy: true,
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| 193 | inside: {
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| 194 | content: {
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| 195 | pattern: /(^..)[\s\S]+(?=..$)/,
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| 196 | lookbehind: true,
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| 197 | inside: {} // see below
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| 198 | },
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| 199 | punctuation: /\*\*|__/
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| 200 | }
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| 201 | },
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| 202 | italic: {
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| 203 | // *em*
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| 204 | // _em_
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| 205 | // allow one nested instance of bold text using the same delimiter
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| 206 | pattern: createInline(
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| 207 | /\b_(?:(?!_)<inner>|__(?:(?!_)<inner>)+__)+_\b|\*(?:(?!\*)<inner>|\*\*(?:(?!\*)<inner>)+\*\*)+\*/
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| 208 | .source
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| 209 | ),
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| 210 | lookbehind: true,
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| 211 | greedy: true,
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| 212 | inside: {
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| 213 | content: {
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| 214 | pattern: /(^.)[\s\S]+(?=.$)/,
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| 215 | lookbehind: true,
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| 216 | inside: {} // see below
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| 217 | },
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| 218 | punctuation: /[*_]/
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| 219 | }
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| 220 | },
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| 221 | strike: {
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| 222 | // ~~strike through~~
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| 223 | // ~strike~
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| 224 | // eslint-disable-next-line regexp/strict
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| 225 | pattern: createInline(/(~~?)(?:(?!~)<inner>)+\2/.source),
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| 226 | lookbehind: true,
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| 227 | greedy: true,
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| 228 | inside: {
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| 229 | content: {
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| 230 | pattern: /(^~~?)[\s\S]+(?=\1$)/,
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| 231 | lookbehind: true,
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| 232 | inside: {} // see below
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| 233 | },
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| 234 | punctuation: /~~?/
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| 235 | }
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| 236 | },
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| 237 | 'code-snippet': {
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| 238 | // `code`
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| 239 | // ``code``
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| 240 | pattern:
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| 241 | /(^|[^\\`])(?:``[^`\r\n]+(?:`[^`\r\n]+)*``(?!`)|`[^`\r\n]+`(?!`))/,
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| 242 | lookbehind: true,
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| 243 | greedy: true,
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| 244 | alias: ['code', 'keyword']
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| 245 | },
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| 246 | url: {
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| 247 | // [example](http://example.com "Optional title")
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| 248 | // [example][id]
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| 249 | // [example] [id]
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| 250 | pattern: createInline(
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| 251 | /!?\[(?:(?!\])<inner>)+\](?:\([^\s)]+(?:[\t ]+"(?:\\.|[^"\\])*")?\)|[ \t]?\[(?:(?!\])<inner>)+\])/
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| 252 | .source
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| 253 | ),
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| 254 | lookbehind: true,
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| 255 | greedy: true,
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| 256 | inside: {
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| 257 | operator: /^!/,
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| 258 | content: {
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| 259 | pattern: /(^\[)[^\]]+(?=\])/,
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| 260 | lookbehind: true,
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| 261 | inside: {} // see below
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| 262 | },
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| 263 | variable: {
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| 264 | pattern: /(^\][ \t]?\[)[^\]]+(?=\]$)/,
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| 265 | lookbehind: true
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| 266 | },
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| 267 | url: {
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| 268 | pattern: /(^\]\()[^\s)]+/,
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| 269 | lookbehind: true
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| 270 | },
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| 271 | string: {
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| 272 | pattern: /(^[ \t]+)"(?:\\.|[^"\\])*"(?=\)$)/,
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| 273 | lookbehind: true
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| 274 | }
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| 275 | }
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| 276 | }
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| 277 | })
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| 278 | ;['url', 'bold', 'italic', 'strike'].forEach(function (token) {
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| 279 | ;['url', 'bold', 'italic', 'strike', 'code-snippet'].forEach(function (
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| 280 | inside
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| 281 | ) {
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| 282 | if (token !== inside) {
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| 283 | Prism.languages.markdown[token].inside.content.inside[inside] =
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| 284 | Prism.languages.markdown[inside]
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| 285 | }
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| 286 | })
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| 287 | })
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| 288 | Prism.hooks.add('after-tokenize', function (env) {
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| 289 | if (env.language !== 'markdown' && env.language !== 'md') {
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| 290 | return
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| 291 | }
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| 292 | function walkTokens(tokens) {
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| 293 | if (!tokens || typeof tokens === 'string') {
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| 294 | return
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| 295 | }
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| 296 | for (var i = 0, l = tokens.length; i < l; i++) {
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| 297 | var token = tokens[i]
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| 298 | if (token.type !== 'code') {
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| 299 | walkTokens(token.content)
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| 300 | continue
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| 301 | }
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| 302 | /*
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| 303 | * Add the correct `language-xxxx` class to this code block. Keep in mind that the `code-language` token
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| 304 | * is optional. But the grammar is defined so that there is only one case we have to handle:
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| 305 | *
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| 306 | * token.content = [
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| 307 | * <span class="punctuation">```</span>,
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| 308 | * <span class="code-language">xxxx</span>,
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| 309 | * '\n', // exactly one new lines (\r or \n or \r\n)
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| 310 | * <span class="code-block">...</span>,
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| 311 | * '\n', // exactly one new lines again
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| 312 | * <span class="punctuation">```</span>
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| 313 | * ];
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| 314 | */
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| 315 | var codeLang = token.content[1]
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| 316 | var codeBlock = token.content[3]
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| 317 | if (
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| 318 | codeLang &&
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| 319 | codeBlock &&
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| 320 | codeLang.type === 'code-language' &&
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| 321 | codeBlock.type === 'code-block' &&
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| 322 | typeof codeLang.content === 'string'
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| 323 | ) {
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| 324 | // this might be a language that Prism does not support
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| 325 | // do some replacements to support C++, C#, and F#
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| 326 | var lang = codeLang.content
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| 327 | .replace(/\b#/g, 'sharp')
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| 328 | .replace(/\b\+\+/g, 'pp') // only use the first word
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| 329 | lang = (/[a-z][\w-]*/i.exec(lang) || [''])[0].toLowerCase()
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| 330 | var alias = 'language-' + lang // add alias
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| 331 | if (!codeBlock.alias) {
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| 332 | codeBlock.alias = [alias]
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| 333 | } else if (typeof codeBlock.alias === 'string') {
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| 334 | codeBlock.alias = [codeBlock.alias, alias]
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| 335 | } else {
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| 336 | codeBlock.alias.push(alias)
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| 337 | }
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| 338 | }
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| 339 | }
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| 340 | }
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| 341 | walkTokens(env.tokens)
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| 342 | })
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| 343 | Prism.hooks.add('wrap', function (env) {
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| 344 | if (env.type !== 'code-block') {
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| 345 | return
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| 346 | }
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| 347 | var codeLang = ''
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| 348 | for (var i = 0, l = env.classes.length; i < l; i++) {
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| 349 | var cls = env.classes[i]
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| 350 | var match = /language-(.+)/.exec(cls)
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| 351 | if (match) {
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| 352 | codeLang = match[1]
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| 353 | break
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| 354 | }
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| 355 | }
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| 356 | var grammar = Prism.languages[codeLang]
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| 357 | if (!grammar) {
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| 358 | if (codeLang && codeLang !== 'none' && Prism.plugins.autoloader) {
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| 359 | var id =
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| 360 | 'md-' +
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| 361 | new Date().valueOf() +
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| 362 | '-' +
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| 363 | Math.floor(Math.random() * 1e16)
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| 364 | env.attributes['id'] = id
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| 365 | Prism.plugins.autoloader.loadLanguages(codeLang, function () {
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| 366 | var ele = document.getElementById(id)
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| 367 | if (ele) {
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| 368 | ele.innerHTML = Prism.highlight(
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| 369 | ele.textContent,
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| 370 | Prism.languages[codeLang],
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| 371 | codeLang
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| 372 | )
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| 373 | }
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| 374 | })
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| 375 | }
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| 376 | } else {
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| 377 | env.content = Prism.highlight(
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| 378 | textContent(env.content.value),
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| 379 | grammar,
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| 380 | codeLang
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| 381 | )
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| 382 | }
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| 383 | })
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| 384 | var tagPattern = RegExp(Prism.languages.markup.tag.pattern.source, 'gi')
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| 385 | /**
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| 386 | * A list of known entity names.
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| 387 | *
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| 388 | * This will always be incomplete to save space. The current list is the one used by lowdash's unescape function.
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| 389 | *
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| 390 | * @see {@link https://github.com/lodash/lodash/blob/2da024c3b4f9947a48517639de7560457cd4ec6c/unescape.js#L2}
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| 391 | */
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| 392 | var KNOWN_ENTITY_NAMES = {
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| 393 | amp: '&',
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| 394 | lt: '<',
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| 395 | gt: '>',
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| 396 | quot: '"'
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| 397 | } // IE 11 doesn't support `String.fromCodePoint`
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| 398 | var fromCodePoint = String.fromCodePoint || String.fromCharCode
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| 399 | /**
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| 400 | * Returns the text content of a given HTML source code string.
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| 401 | *
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| 402 | * @param {string} html
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| 403 | * @returns {string}
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| 404 | */
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| 405 | function textContent(html) {
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| 406 | // remove all tags
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| 407 | var text = html.replace(tagPattern, '') // decode known entities
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| 408 | text = text.replace(/&(\w{1,8}|#x?[\da-f]{1,8});/gi, function (m, code) {
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| 409 | code = code.toLowerCase()
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| 410 | if (code[0] === '#') {
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| 411 | var value
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| 412 | if (code[1] === 'x') {
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| 413 | value = parseInt(code.slice(2), 16)
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| 414 | } else {
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| 415 | value = Number(code.slice(1))
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| 416 | }
|
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| 417 | return fromCodePoint(value)
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| 418 | } else {
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| 419 | var known = KNOWN_ENTITY_NAMES[code]
|
|---|
| 420 | if (known) {
|
|---|
| 421 | return known
|
|---|
| 422 | } // unable to decode
|
|---|
| 423 | return m
|
|---|
| 424 | }
|
|---|
| 425 | })
|
|---|
| 426 | return text
|
|---|
| 427 | }
|
|---|
| 428 | Prism.languages.md = Prism.languages.markdown
|
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| 429 | })(Prism)
|
|---|
| 430 | }
|
|---|
