| 1 | 'use strict'
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| 2 | var refractorCsharp = require('./csharp.js')
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| 3 | module.exports = cshtml
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| 4 | cshtml.displayName = 'cshtml'
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| 5 | cshtml.aliases = ['razor']
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| 6 | function cshtml(Prism) {
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| 7 | Prism.register(refractorCsharp)
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| 8 | // Docs:
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| 9 | // https://docs.microsoft.com/en-us/aspnet/core/razor-pages/?view=aspnetcore-5.0&tabs=visual-studio
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| 10 | // https://docs.microsoft.com/en-us/aspnet/core/mvc/views/razor?view=aspnetcore-5.0
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| 11 | ;(function (Prism) {
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| 12 | var commentLike = /\/(?![/*])|\/\/.*[\r\n]|\/\*[^*]*(?:\*(?!\/)[^*]*)*\*\//
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| 13 | .source
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| 14 | var stringLike =
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| 15 | /@(?!")|"(?:[^\r\n\\"]|\\.)*"|@"(?:[^\\"]|""|\\[\s\S])*"(?!")/.source +
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| 16 | '|' +
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| 17 | /'(?:(?:[^\r\n'\\]|\\.|\\[Uux][\da-fA-F]{1,8})'|(?=[^\\](?!')))/.source
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| 18 | /**
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| 19 | * Creates a nested pattern where all occurrences of the string `<<self>>` are replaced with the pattern itself.
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| 20 | *
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| 21 | * @param {string} pattern
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| 22 | * @param {number} depthLog2
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| 23 | * @returns {string}
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| 24 | */
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| 25 | function nested(pattern, depthLog2) {
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| 26 | for (var i = 0; i < depthLog2; i++) {
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| 27 | pattern = pattern.replace(/<self>/g, function () {
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| 28 | return '(?:' + pattern + ')'
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| 29 | })
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| 30 | }
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| 31 | return pattern
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| 32 | .replace(/<self>/g, '[^\\s\\S]')
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| 33 | .replace(/<str>/g, '(?:' + stringLike + ')')
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| 34 | .replace(/<comment>/g, '(?:' + commentLike + ')')
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| 35 | }
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| 36 | var round = nested(/\((?:[^()'"@/]|<str>|<comment>|<self>)*\)/.source, 2)
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| 37 | var square = nested(/\[(?:[^\[\]'"@/]|<str>|<comment>|<self>)*\]/.source, 2)
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| 38 | var curly = nested(/\{(?:[^{}'"@/]|<str>|<comment>|<self>)*\}/.source, 2)
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| 39 | var angle = nested(/<(?:[^<>'"@/]|<str>|<comment>|<self>)*>/.source, 2) // Note about the above bracket patterns:
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| 40 | // They all ignore HTML expressions that might be in the C# code. This is a problem because HTML (like strings and
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| 41 | // comments) is parsed differently. This is a huge problem because HTML might contain brackets and quotes which
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| 42 | // messes up the bracket and string counting implemented by the above patterns.
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| 43 | //
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| 44 | // This problem is not fixable because 1) HTML expression are highly context sensitive and very difficult to detect
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| 45 | // and 2) they require one capturing group at every nested level. See the `tagRegion` pattern to admire the
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| 46 | // complexity of an HTML expression.
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| 47 | //
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| 48 | // To somewhat alleviate the problem a bit, the patterns for characters (e.g. 'a') is very permissive, it also
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| 49 | // allows invalid characters to support HTML expressions like this: <p>That's it!</p>.
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| 50 | var tagAttrs =
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| 51 | /(?:\s(?:\s*[^\s>\/=]+(?:\s*=\s*(?:"[^"]*"|'[^']*'|[^\s'">=]+(?=[\s>]))|(?=[\s/>])))+)?/
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| 52 | .source
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| 53 | var tagContent = /(?!\d)[^\s>\/=$<%]+/.source + tagAttrs + /\s*\/?>/.source
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| 54 | var tagRegion =
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| 55 | /\B@?/.source +
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| 56 | '(?:' +
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| 57 | /<([a-zA-Z][\w:]*)/.source +
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| 58 | tagAttrs +
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| 59 | /\s*>/.source +
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| 60 | '(?:' +
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| 61 | (/[^<]/.source +
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| 62 | '|' + // all tags that are not the start tag
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| 63 | // eslint-disable-next-line regexp/strict
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| 64 | /<\/?(?!\1\b)/.source +
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| 65 | tagContent +
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| 66 | '|' + // nested start tag
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| 67 | nested(
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| 68 | // eslint-disable-next-line regexp/strict
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| 69 | /<\1/.source +
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| 70 | tagAttrs +
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| 71 | /\s*>/.source +
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| 72 | '(?:' +
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| 73 | (/[^<]/.source +
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| 74 | '|' + // all tags that are not the start tag
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| 75 | // eslint-disable-next-line regexp/strict
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| 76 | /<\/?(?!\1\b)/.source +
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| 77 | tagContent +
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| 78 | '|' +
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| 79 | '<self>') +
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| 80 | ')*' + // eslint-disable-next-line regexp/strict
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| 81 | /<\/\1\s*>/.source,
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| 82 | 2
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| 83 | )) +
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| 84 | ')*' + // eslint-disable-next-line regexp/strict
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| 85 | /<\/\1\s*>/.source +
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| 86 | '|' +
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| 87 | /</.source +
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| 88 | tagContent +
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| 89 | ')' // Now for the actual language definition(s):
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| 90 | //
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| 91 | // Razor as a language has 2 parts:
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| 92 | // 1) CSHTML: A markup-like language that has been extended with inline C# code expressions and blocks.
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| 93 | // 2) C#+HTML: A variant of C# that can contain CSHTML tags as expressions.
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| 94 | //
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| 95 | // In the below code, both CSHTML and C#+HTML will be create as separate language definitions that reference each
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| 96 | // other. However, only CSHTML will be exported via `Prism.languages`.
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| 97 | Prism.languages.cshtml = Prism.languages.extend('markup', {})
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| 98 | var csharpWithHtml = Prism.languages.insertBefore(
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| 99 | 'csharp',
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| 100 | 'string',
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| 101 | {
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| 102 | html: {
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| 103 | pattern: RegExp(tagRegion),
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| 104 | greedy: true,
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| 105 | inside: Prism.languages.cshtml
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| 106 | }
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| 107 | },
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| 108 | {
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| 109 | csharp: Prism.languages.extend('csharp', {})
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| 110 | }
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| 111 | )
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| 112 | var cs = {
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| 113 | pattern: /\S[\s\S]*/,
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| 114 | alias: 'language-csharp',
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| 115 | inside: csharpWithHtml
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| 116 | }
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| 117 | Prism.languages.insertBefore('cshtml', 'prolog', {
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| 118 | 'razor-comment': {
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| 119 | pattern: /@\*[\s\S]*?\*@/,
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| 120 | greedy: true,
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| 121 | alias: 'comment'
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| 122 | },
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| 123 | block: {
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| 124 | pattern: RegExp(
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| 125 | /(^|[^@])@/.source +
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| 126 | '(?:' +
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| 127 | [
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| 128 | // @{ ... }
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| 129 | curly, // @code{ ... }
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| 130 | /(?:code|functions)\s*/.source + curly, // @for (...) { ... }
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| 131 | /(?:for|foreach|lock|switch|using|while)\s*/.source +
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| 132 | round +
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| 133 | /\s*/.source +
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| 134 | curly, // @do { ... } while (...);
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| 135 | /do\s*/.source +
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| 136 | curly +
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| 137 | /\s*while\s*/.source +
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| 138 | round +
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| 139 | /(?:\s*;)?/.source, // @try { ... } catch (...) { ... } finally { ... }
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| 140 | /try\s*/.source +
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| 141 | curly +
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| 142 | /\s*catch\s*/.source +
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| 143 | round +
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| 144 | /\s*/.source +
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| 145 | curly +
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| 146 | /\s*finally\s*/.source +
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| 147 | curly, // @if (...) {...} else if (...) {...} else {...}
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| 148 | /if\s*/.source +
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| 149 | round +
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| 150 | /\s*/.source +
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| 151 | curly +
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| 152 | '(?:' +
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| 153 | /\s*else/.source +
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| 154 | '(?:' +
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| 155 | /\s+if\s*/.source +
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| 156 | round +
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| 157 | ')?' +
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| 158 | /\s*/.source +
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| 159 | curly +
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| 160 | ')*'
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| 161 | ].join('|') +
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| 162 | ')'
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| 163 | ),
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| 164 | lookbehind: true,
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| 165 | greedy: true,
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| 166 | inside: {
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| 167 | keyword: /^@\w*/,
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| 168 | csharp: cs
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| 169 | }
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| 170 | },
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| 171 | directive: {
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| 172 | pattern:
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| 173 | /^([ \t]*)@(?:addTagHelper|attribute|implements|inherits|inject|layout|model|namespace|page|preservewhitespace|removeTagHelper|section|tagHelperPrefix|using)(?=\s).*/m,
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| 174 | lookbehind: true,
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| 175 | greedy: true,
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| 176 | inside: {
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| 177 | keyword: /^@\w+/,
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| 178 | csharp: cs
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| 179 | }
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| 180 | },
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| 181 | value: {
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| 182 | pattern: RegExp(
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| 183 | /(^|[^@])@/.source +
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| 184 | /(?:await\b\s*)?/.source +
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| 185 | '(?:' +
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| 186 | /\w+\b/.source +
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| 187 | '|' +
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| 188 | round +
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| 189 | ')' +
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| 190 | '(?:' +
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| 191 | /[?!]?\.\w+\b/.source +
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| 192 | '|' +
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| 193 | round +
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| 194 | '|' +
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| 195 | square +
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| 196 | '|' +
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| 197 | angle +
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| 198 | round +
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| 199 | ')*'
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| 200 | ),
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| 201 | lookbehind: true,
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| 202 | greedy: true,
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| 203 | alias: 'variable',
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| 204 | inside: {
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| 205 | keyword: /^@/,
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| 206 | csharp: cs
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| 207 | }
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| 208 | },
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| 209 | 'delegate-operator': {
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| 210 | pattern: /(^|[^@])@(?=<)/,
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| 211 | lookbehind: true,
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| 212 | alias: 'operator'
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| 213 | }
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| 214 | })
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| 215 | Prism.languages.razor = Prism.languages.cshtml
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| 216 | })(Prism)
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| 217 | }
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