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80 lines
2.6 KiB
TypeScript
80 lines
2.6 KiB
TypeScript
// Prism syntax highlighting referenced from Refractor
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// https://github.com/wooorm/refractor/blob/main/lang/dart.js
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export function dart(Prism: any) {
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// Handles named imports, such as http.Client
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const keywords = [
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/\b(?:async|sync|yield)\*/,
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/\b(?:abstract|assert|async|await|break|case|catch|class|const|continue|covariant|default|deferred|do|dynamic|else|enum|export|extends|extension|external|factory|final|finally|for|get|hide|if|implements|import|in|interface|library|mixin|new|null|on|operator|part|rethrow|return|set|show|static|super|switch|sync|this|throw|try|typedef|var|void|while|with|yield)\b/,
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]
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// based on the dart naming conventions
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const packagePrefix = /(^|[^\w.])(?:[a-z]\w*\s*\.\s*)*(?:[A-Z]\w*\s*\.\s*)*/.source
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const className = {
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pattern: RegExp(packagePrefix + /[A-Z](?:[\d_A-Z]*[a-z]\w*)?\b/.source),
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lookbehind: true,
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inside: {
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namespace: {
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pattern: /^[a-z]\w*(?:\s*\.\s*[a-z]\w*)*(?:\s*\.)?/,
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inside: {
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punctuation: /\./,
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},
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},
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},
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}
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Prism.languages.dart = Prism.languages.extend('clike', {
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'class-name': [
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className,
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{
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// variables and parameters
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// supports class names (or generic parameters) which do not contain a lower case letter (also works for methods)
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pattern: RegExp(packagePrefix + /[A-Z]\w*(?=\s+\w+\s*[;,=()])/.source),
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lookbehind: true,
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inside: className.inside,
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},
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],
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keyword: keywords,
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operator: /\bis!|\b(?:as|is)\b|\+\+|--|&&|\|\||<<=?|>>=?|~(?:\/=?)?|[+\-*\/%&^|=!<>]=?|\?/,
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})
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Prism.languages.insertBefore('dart', 'string', {
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'string-literal': {
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pattern: /r?(?:("""|''')[\s\S]*?\1|(["'])(?:\\.|(?!\2)[^\\\r\n])*\2(?!\2))/,
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greedy: true,
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inside: {
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interpolation: {
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pattern: /((?:^|[^\\])(?:\\{2})*)\$(?:\w+|\{(?:[^{}]|\{[^{}]*\})*\})/,
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lookbehind: true,
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inside: {
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punctuation: /^\$\{?|\}$/,
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expression: {
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pattern: /[\s\S]+/,
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inside: Prism.languages.dart,
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},
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},
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},
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string: /[\s\S]+/,
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},
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},
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string: undefined,
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})
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Prism.languages.insertBefore('dart', 'class-name', {
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metadata: {
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pattern: /@\w+/,
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alias: 'function',
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},
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})
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Prism.languages.insertBefore('dart', 'class-name', {
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generics: {
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pattern: /<(?:[\w\s,.&?]|<(?:[\w\s,.&?]|<(?:[\w\s,.&?]|<[\w\s,.&?]*>)*>)*>)*>/,
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inside: {
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'class-name': className,
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keyword: keywords,
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punctuation: /[<>(),.:]/,
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operator: /[?&|]/,
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},
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},
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})
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}
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