| [d24f17c] | 1 | // Docs:
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| 2 | // https://docs.microsoft.com/en-us/aspnet/core/razor-pages/?view=aspnetcore-5.0&tabs=visual-studio
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| 3 | // https://docs.microsoft.com/en-us/aspnet/core/mvc/views/razor?view=aspnetcore-5.0
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| 4 |
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| 5 | (function (Prism) {
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| 6 |
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| 7 | var commentLike = /\/(?![/*])|\/\/.*[\r\n]|\/\*[^*]*(?:\*(?!\/)[^*]*)*\*\//.source;
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| 8 | var stringLike =
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| 9 | /@(?!")|"(?:[^\r\n\\"]|\\.)*"|@"(?:[^\\"]|""|\\[\s\S])*"(?!")/.source +
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| 10 | '|' +
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| 11 | /'(?:(?:[^\r\n'\\]|\\.|\\[Uux][\da-fA-F]{1,8})'|(?=[^\\](?!')))/.source;
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| 12 |
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| 13 | /**
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| 14 | * Creates a nested pattern where all occurrences of the string `<<self>>` are replaced with the pattern itself.
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| 15 | *
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| 16 | * @param {string} pattern
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| 17 | * @param {number} depthLog2
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| 18 | * @returns {string}
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| 19 | */
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| 20 | function nested(pattern, depthLog2) {
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| 21 | for (var i = 0; i < depthLog2; i++) {
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| 22 | pattern = pattern.replace(/<self>/g, function () { return '(?:' + pattern + ')'; });
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| 23 | }
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| 24 | return pattern
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| 25 | .replace(/<self>/g, '[^\\s\\S]')
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| 26 | .replace(/<str>/g, '(?:' + stringLike + ')')
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| 27 | .replace(/<comment>/g, '(?:' + commentLike + ')');
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| 28 | }
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| 29 |
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| 30 | var round = nested(/\((?:[^()'"@/]|<str>|<comment>|<self>)*\)/.source, 2);
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| 31 | var square = nested(/\[(?:[^\[\]'"@/]|<str>|<comment>|<self>)*\]/.source, 1);
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| 32 | var curly = nested(/\{(?:[^{}'"@/]|<str>|<comment>|<self>)*\}/.source, 2);
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| 33 | var angle = nested(/<(?:[^<>'"@/]|<comment>|<self>)*>/.source, 1);
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| 34 |
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| 35 | var inlineCs = /@/.source +
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| 36 | /(?:await\b\s*)?/.source +
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| 37 | '(?:' + /(?!await\b)\w+\b/.source + '|' + round + ')' +
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| 38 | '(?:' + /[?!]?\.\w+\b/.source + '|' + '(?:' + angle + ')?' + round + '|' + square + ')*' +
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| 39 | /(?![?!\.(\[]|<(?!\/))/.source;
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| 40 |
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| 41 | // Note about the above bracket patterns:
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| 42 | // 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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| 43 | // comments) is parsed differently. This is a huge problem because HTML might contain brackets and quotes which
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| 44 | // messes up the bracket and string counting implemented by the above patterns.
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| 45 | //
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| 46 | // This problem is not fixable because 1) HTML expression are highly context sensitive and very difficult to detect
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| 47 | // and 2) they require one capturing group at every nested level. See the `tagRegion` pattern to admire the
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| 48 | // complexity of an HTML expression.
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| 49 | //
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| 50 | // To somewhat alleviate the problem a bit, the patterns for characters (e.g. 'a') is very permissive, it also
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| 51 | // allows invalid characters to support HTML expressions like this: <p>That's it!</p>.
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| 52 |
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| 53 | var tagAttrInlineCs = /@(?![\w()])/.source + '|' + inlineCs;
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| 54 | var tagAttrValue = '(?:' +
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| 55 | /"[^"@]*"|'[^'@]*'|[^\s'"@>=]+(?=[\s>])/.source +
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| 56 | '|' +
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| 57 | '["\'][^"\'@]*(?:(?:' + tagAttrInlineCs + ')[^"\'@]*)+["\']' +
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| 58 | ')';
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| 59 |
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| 60 | var tagAttrs = /(?:\s(?:\s*[^\s>\/=]+(?:\s*=\s*<tagAttrValue>|(?=[\s/>])))+)?/.source.replace(/<tagAttrValue>/, tagAttrValue);
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| 61 | var tagContent = /(?!\d)[^\s>\/=$<%]+/.source + tagAttrs + /\s*\/?>/.source;
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| 62 | var tagRegion =
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| 63 | /\B@?/.source +
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| 64 | '(?:' +
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| 65 | /<([a-zA-Z][\w:]*)/.source + tagAttrs + /\s*>/.source +
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| 66 | '(?:' +
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| 67 | (
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| 68 | /[^<]/.source +
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| 69 | '|' +
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| 70 | // all tags that are not the start tag
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| 71 | // eslint-disable-next-line regexp/strict
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| 72 | /<\/?(?!\1\b)/.source + tagContent +
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| 73 | '|' +
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| 74 | // nested start tag
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| 75 | nested(
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| 76 | // eslint-disable-next-line regexp/strict
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| 77 | /<\1/.source + tagAttrs + /\s*>/.source +
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| 78 | '(?:' +
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| 79 | (
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| 80 | /[^<]/.source +
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| 81 | '|' +
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| 82 | // all tags that are not the start tag
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| 83 | // eslint-disable-next-line regexp/strict
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| 84 | /<\/?(?!\1\b)/.source + tagContent +
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| 85 | '|' +
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| 86 | '<self>'
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| 87 | ) +
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| 88 | ')*' +
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| 89 | // eslint-disable-next-line regexp/strict
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| 90 | /<\/\1\s*>/.source,
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| 91 | 2
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| 92 | )
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| 93 | ) +
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| 94 | ')*' +
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| 95 | // eslint-disable-next-line regexp/strict
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| 96 | /<\/\1\s*>/.source +
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| 97 | '|' +
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| 98 | /</.source + tagContent +
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| 99 | ')';
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| 100 |
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| 101 | // Now for the actual language definition(s):
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| 102 | //
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| 103 | // Razor as a language has 2 parts:
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| 104 | // 1) CSHTML: A markup-like language that has been extended with inline C# code expressions and blocks.
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| 105 | // 2) C#+HTML: A variant of C# that can contain CSHTML tags as expressions.
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| 106 | //
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| 107 | // In the below code, both CSHTML and C#+HTML will be create as separate language definitions that reference each
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| 108 | // other. However, only CSHTML will be exported via `Prism.languages`.
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| 109 |
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| 110 | Prism.languages.cshtml = Prism.languages.extend('markup', {});
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| 111 |
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| 112 | var csharpWithHtml = Prism.languages.insertBefore('csharp', 'string', {
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| 113 | 'html': {
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| 114 | pattern: RegExp(tagRegion),
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| 115 | greedy: true,
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| 116 | inside: Prism.languages.cshtml
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| 117 | },
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| 118 | }, { csharp: Prism.languages.extend('csharp', {}) });
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| 119 |
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| 120 | var cs = {
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| 121 | pattern: /\S[\s\S]*/,
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| 122 | alias: 'language-csharp',
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| 123 | inside: csharpWithHtml
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| 124 | };
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| 125 |
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| 126 | var inlineValue = {
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| 127 | pattern: RegExp(/(^|[^@])/.source + inlineCs),
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| 128 | lookbehind: true,
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| 129 | greedy: true,
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| 130 | alias: 'variable',
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| 131 | inside: {
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| 132 | 'keyword': /^@/,
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| 133 | 'csharp': cs
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| 134 | }
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| 135 | };
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| 136 |
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| 137 | Prism.languages.cshtml.tag.pattern = RegExp(/<\/?/.source + tagContent);
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| 138 | Prism.languages.cshtml.tag.inside['attr-value'].pattern = RegExp(/=\s*/.source + tagAttrValue);
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| 139 | Prism.languages.insertBefore('inside', 'punctuation', { 'value': inlineValue }, Prism.languages.cshtml.tag.inside['attr-value']);
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| 140 |
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| 141 | Prism.languages.insertBefore('cshtml', 'prolog', {
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| 142 | 'razor-comment': {
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| 143 | pattern: /@\*[\s\S]*?\*@/,
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| 144 | greedy: true,
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| 145 | alias: 'comment'
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| 146 | },
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| 147 |
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| 148 | 'block': {
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| 149 | pattern: RegExp(
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| 150 | /(^|[^@])@/.source +
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| 151 | '(?:' +
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| 152 | [
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| 153 | // @{ ... }
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| 154 | curly,
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| 155 | // @code{ ... }
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| 156 | /(?:code|functions)\s*/.source + curly,
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| 157 | // @for (...) { ... }
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| 158 | /(?:for|foreach|lock|switch|using|while)\s*/.source + round + /\s*/.source + curly,
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| 159 | // @do { ... } while (...);
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| 160 | /do\s*/.source + curly + /\s*while\s*/.source + round + /(?:\s*;)?/.source,
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| 161 | // @try { ... } catch (...) { ... } finally { ... }
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| 162 | /try\s*/.source + curly + /\s*catch\s*/.source + round + /\s*/.source + curly + /\s*finally\s*/.source + curly,
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| 163 | // @if (...) {...} else if (...) {...} else {...}
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| 164 | /if\s*/.source + round + /\s*/.source + curly + '(?:' + /\s*else/.source + '(?:' + /\s+if\s*/.source + round + ')?' + /\s*/.source + curly + ')*',
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| 165 | // @helper Ident(params) { ... }
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| 166 | /helper\s+\w+\s*/.source + round + /\s*/.source + curly,
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| 167 | ].join('|') +
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| 168 | ')'
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| 169 | ),
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| 170 | lookbehind: true,
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| 171 | greedy: true,
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| 172 | inside: {
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| 173 | 'keyword': /^@\w*/,
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| 174 | 'csharp': cs
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| 175 | }
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| 176 | },
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| 177 |
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| 178 | 'directive': {
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| 179 | pattern: /^([ \t]*)@(?:addTagHelper|attribute|implements|inherits|inject|layout|model|namespace|page|preservewhitespace|removeTagHelper|section|tagHelperPrefix|using)(?=\s).*/m,
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| 180 | lookbehind: true,
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| 181 | greedy: true,
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| 182 | inside: {
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| 183 | 'keyword': /^@\w+/,
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| 184 | 'csharp': cs
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| 185 | }
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| 186 | },
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| 187 |
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| 188 | 'value': inlineValue,
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| 189 |
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| 190 | 'delegate-operator': {
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| 191 | pattern: /(^|[^@])@(?=<)/,
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| 192 | lookbehind: true,
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| 193 | alias: 'operator'
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| 194 | }
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| 195 | });
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| 196 |
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| 197 | Prism.languages.razor = Prism.languages.cshtml;
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| 198 |
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| 199 | }(Prism));
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