hexo/node_modules/prismjs/components/prism-cshtml.js

200 lines
6.7 KiB
JavaScript

// Docs:
// https://docs.microsoft.com/en-us/aspnet/core/razor-pages/?view=aspnetcore-5.0&tabs=visual-studio
// https://docs.microsoft.com/en-us/aspnet/core/mvc/views/razor?view=aspnetcore-5.0
(function (Prism) {
var commentLike = /\/(?![/*])|\/\/.*[\r\n]|\/\*[^*]*(?:\*(?!\/)[^*]*)*\*\//.source;
var stringLike =
/@(?!")|"(?:[^\r\n\\"]|\\.)*"|@"(?:[^\\"]|""|\\[\s\S])*"(?!")/.source +
'|' +
/'(?:(?:[^\r\n'\\]|\\.|\\[Uux][\da-fA-F]{1,8})'|(?=[^\\](?!')))/.source;
/**
* Creates a nested pattern where all occurrences of the string `<<self>>` are replaced with the pattern itself.
*
* @param {string} pattern
* @param {number} depthLog2
* @returns {string}
*/
function nested(pattern, depthLog2) {
for (var i = 0; i < depthLog2; i++) {
pattern = pattern.replace(/<self>/g, function () { return '(?:' + pattern + ')'; });
}
return pattern
.replace(/<self>/g, '[^\\s\\S]')
.replace(/<str>/g, '(?:' + stringLike + ')')
.replace(/<comment>/g, '(?:' + commentLike + ')');
}
var round = nested(/\((?:[^()'"@/]|<str>|<comment>|<self>)*\)/.source, 2);
var square = nested(/\[(?:[^\[\]'"@/]|<str>|<comment>|<self>)*\]/.source, 1);
var curly = nested(/\{(?:[^{}'"@/]|<str>|<comment>|<self>)*\}/.source, 2);
var angle = nested(/<(?:[^<>'"@/]|<comment>|<self>)*>/.source, 1);
var inlineCs = /@/.source +
/(?:await\b\s*)?/.source +
'(?:' + /(?!await\b)\w+\b/.source + '|' + round + ')' +
'(?:' + /[?!]?\.\w+\b/.source + '|' + '(?:' + angle + ')?' + round + '|' + square + ')*' +
/(?![?!\.(\[]|<(?!\/))/.source;
// Note about the above bracket patterns:
// They all ignore HTML expressions that might be in the C# code. This is a problem because HTML (like strings and
// comments) is parsed differently. This is a huge problem because HTML might contain brackets and quotes which
// messes up the bracket and string counting implemented by the above patterns.
//
// This problem is not fixable because 1) HTML expression are highly context sensitive and very difficult to detect
// and 2) they require one capturing group at every nested level. See the `tagRegion` pattern to admire the
// complexity of an HTML expression.
//
// To somewhat alleviate the problem a bit, the patterns for characters (e.g. 'a') is very permissive, it also
// allows invalid characters to support HTML expressions like this: <p>That's it!</p>.
var tagAttrInlineCs = /@(?![\w()])/.source + '|' + inlineCs;
var tagAttrValue = '(?:' +
/"[^"@]*"|'[^'@]*'|[^\s'"@>=]+(?=[\s>])/.source +
'|' +
'["\'][^"\'@]*(?:(?:' + tagAttrInlineCs + ')[^"\'@]*)+["\']' +
')';
var tagAttrs = /(?:\s(?:\s*[^\s>\/=]+(?:\s*=\s*<tagAttrValue>|(?=[\s/>])))+)?/.source.replace(/<tagAttrValue>/, tagAttrValue);
var tagContent = /(?!\d)[^\s>\/=$<%]+/.source + tagAttrs + /\s*\/?>/.source;
var tagRegion =
/\B@?/.source +
'(?:' +
/<([a-zA-Z][\w:]*)/.source + tagAttrs + /\s*>/.source +
'(?:' +
(
/[^<]/.source +
'|' +
// all tags that are not the start tag
// eslint-disable-next-line regexp/strict
/<\/?(?!\1\b)/.source + tagContent +
'|' +
// nested start tag
nested(
// eslint-disable-next-line regexp/strict
/<\1/.source + tagAttrs + /\s*>/.source +
'(?:' +
(
/[^<]/.source +
'|' +
// all tags that are not the start tag
// eslint-disable-next-line regexp/strict
/<\/?(?!\1\b)/.source + tagContent +
'|' +
'<self>'
) +
')*' +
// eslint-disable-next-line regexp/strict
/<\/\1\s*>/.source,
2
)
) +
')*' +
// eslint-disable-next-line regexp/strict
/<\/\1\s*>/.source +
'|' +
/</.source + tagContent +
')';
// Now for the actual language definition(s):
//
// Razor as a language has 2 parts:
// 1) CSHTML: A markup-like language that has been extended with inline C# code expressions and blocks.
// 2) C#+HTML: A variant of C# that can contain CSHTML tags as expressions.
//
// In the below code, both CSHTML and C#+HTML will be create as separate language definitions that reference each
// other. However, only CSHTML will be exported via `Prism.languages`.
Prism.languages.cshtml = Prism.languages.extend('markup', {});
var csharpWithHtml = Prism.languages.insertBefore('csharp', 'string', {
'html': {
pattern: RegExp(tagRegion),
greedy: true,
inside: Prism.languages.cshtml
},
}, { csharp: Prism.languages.extend('csharp', {}) });
var cs = {
pattern: /\S[\s\S]*/,
alias: 'language-csharp',
inside: csharpWithHtml
};
var inlineValue = {
pattern: RegExp(/(^|[^@])/.source + inlineCs),
lookbehind: true,
greedy: true,
alias: 'variable',
inside: {
'keyword': /^@/,
'csharp': cs
}
};
Prism.languages.cshtml.tag.pattern = RegExp(/<\/?/.source + tagContent);
Prism.languages.cshtml.tag.inside['attr-value'].pattern = RegExp(/=\s*/.source + tagAttrValue);
Prism.languages.insertBefore('inside', 'punctuation', { 'value': inlineValue }, Prism.languages.cshtml.tag.inside['attr-value']);
Prism.languages.insertBefore('cshtml', 'prolog', {
'razor-comment': {
pattern: /@\*[\s\S]*?\*@/,
greedy: true,
alias: 'comment'
},
'block': {
pattern: RegExp(
/(^|[^@])@/.source +
'(?:' +
[
// @{ ... }
curly,
// @code{ ... }
/(?:code|functions)\s*/.source + curly,
// @for (...) { ... }
/(?:for|foreach|lock|switch|using|while)\s*/.source + round + /\s*/.source + curly,
// @do { ... } while (...);
/do\s*/.source + curly + /\s*while\s*/.source + round + /(?:\s*;)?/.source,
// @try { ... } catch (...) { ... } finally { ... }
/try\s*/.source + curly + /\s*catch\s*/.source + round + /\s*/.source + curly + /\s*finally\s*/.source + curly,
// @if (...) {...} else if (...) {...} else {...}
/if\s*/.source + round + /\s*/.source + curly + '(?:' + /\s*else/.source + '(?:' + /\s+if\s*/.source + round + ')?' + /\s*/.source + curly + ')*',
// @helper Ident(params) { ... }
/helper\s+\w+\s*/.source + round + /\s*/.source + curly,
].join('|') +
')'
),
lookbehind: true,
greedy: true,
inside: {
'keyword': /^@\w*/,
'csharp': cs
}
},
'directive': {
pattern: /^([ \t]*)@(?:addTagHelper|attribute|implements|inherits|inject|layout|model|namespace|page|preservewhitespace|removeTagHelper|section|tagHelperPrefix|using)(?=\s).*/m,
lookbehind: true,
greedy: true,
inside: {
'keyword': /^@\w+/,
'csharp': cs
}
},
'value': inlineValue,
'delegate-operator': {
pattern: /(^|[^@])@(?=<)/,
lookbehind: true,
alias: 'operator'
}
});
Prism.languages.razor = Prism.languages.cshtml;
}(Prism));