refractor/lang/dart.js

Lightweight, robust, elegant virtual syntax highlighting using Prism

// @ts-nocheck
/**
 * @import {Refractor} from '../lib/core.js'
 */
import refractorClike from './clike.js'
dart.displayName = 'dart'
dart.aliases = []

/** @param {Refractor} Prism */
export default function dart(Prism) {
  Prism.register(refractorClike)
  ;(function (Prism) {
    var keywords = [
      /\b(?:async|sync|yield)\*/,
      /\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/
    ]

    // Handles named imports, such as http.Client
    var packagePrefix = /(^|[^\w.])(?:[a-z]\w*\s*\.\s*)*(?:[A-Z]\w*\s*\.\s*)*/
      .source

    // based on the dart naming conventions
    var className = {
      pattern: RegExp(packagePrefix + /[A-Z](?:[\d_A-Z]*[a-z]\w*)?\b/.source),
      lookbehind: true,
      inside: {
        namespace: {
          pattern: /^[a-z]\w*(?:\s*\.\s*[a-z]\w*)*(?:\s*\.)?/,
          inside: {
            punctuation: /\./
          }
        }
      }
    }
    Prism.languages.dart = Prism.languages.extend('clike', {
      'class-name': [
        className,
        {
          // variables and parameters
          // this to support class names (or generic parameters) which do not contain a lower case letter (also works for methods)
          pattern: RegExp(
            packagePrefix + /[A-Z]\w*(?=\s+\w+\s*[;,=()])/.source
          ),
          lookbehind: true,
          inside: className.inside
        }
      ],
      keyword: keywords,
      operator:
        /\bis!|\b(?:as|is)\b|\+\+|--|&&|\|\||<<=?|>>=?|~(?:\/=?)?|[+\-*\/%&^|=!<>]=?|\?/
    })
    Prism.languages.insertBefore('dart', 'string', {
      'string-literal': {
        pattern:
          /r?(?:("""|''')[\s\S]*?\1|(["'])(?:\\.|(?!\2)[^\\\r\n])*\2(?!\2))/,
        greedy: true,
        inside: {
          interpolation: {
            pattern:
              /((?:^|[^\\])(?:\\{2})*)\$(?:\w+|\{(?:[^{}]|\{[^{}]*\})*\})/,
            lookbehind: true,
            inside: {
              punctuation: /^\$\{?|\}$/,
              expression: {
                pattern: /[\s\S]+/,
                inside: Prism.languages.dart
              }
            }
          },
          string: /[\s\S]+/
        }
      },
      string: undefined
    })
    Prism.languages.insertBefore('dart', 'class-name', {
      metadata: {
        pattern: /@\w+/,
        alias: 'function'
      }
    })
    Prism.languages.insertBefore('dart', 'class-name', {
      generics: {
        pattern:
          /<(?:[\w\s,.&?]|<(?:[\w\s,.&?]|<(?:[\w\s,.&?]|<[\w\s,.&?]*>)*>)*>)*>/,
        inside: {
          'class-name': className,
          keyword: keywords,
          punctuation: /[<>(),.:]/,
          operator: /[?&|]/
        }
      }
    })
  })(Prism)
}