refractor/lang/java.js

Lightweight, robust, elegant virtual syntax highlighting using Prism

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

/** @param {Refractor} Prism */
export default function java(Prism) {
  Prism.register(refractorClike)
  ;(function (Prism) {
    var keywords =
      /\b(?:abstract|assert|boolean|break|byte|case|catch|char|class|const|continue|default|do|double|else|enum|exports|extends|final|finally|float|for|goto|if|implements|import|instanceof|int|interface|long|module|native|new|non-sealed|null|open|opens|package|permits|private|protected|provides|public|record(?!\s*[(){}[\]<>=%~.:,;?+\-*/&|^])|requires|return|sealed|short|static|strictfp|super|switch|synchronized|this|throw|throws|to|transient|transitive|try|uses|var|void|volatile|while|with|yield)\b/

    // full package (optional) + parent classes (optional)
    var classNamePrefix = /(?:[a-z]\w*\s*\.\s*)*(?:[A-Z]\w*\s*\.\s*)*/.source

    // based on the java naming conventions
    var className = {
      pattern: RegExp(
        /(^|[^\w.])/.source +
          classNamePrefix +
          /[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: /\./
          }
        },
        punctuation: /\./
      }
    }
    Prism.languages.java = Prism.languages.extend('clike', {
      string: {
        pattern: /(^|[^\\])"(?:\\.|[^"\\\r\n])*"/,
        lookbehind: true,
        greedy: true
      },
      'class-name': [
        className,
        {
          // variables, parameters, and constructor references
          // this to support class names (or generic parameters) which do not contain a lower case letter (also works for methods)
          pattern: RegExp(
            /(^|[^\w.])/.source +
              classNamePrefix +
              /[A-Z]\w*(?=\s+\w+\s*[;,=()]|\s*(?:\[[\s,]*\]\s*)?::\s*new\b)/
                .source
          ),
          lookbehind: true,
          inside: className.inside
        },
        {
          // class names based on keyword
          // this to support class names (or generic parameters) which do not contain a lower case letter (also works for methods)
          pattern: RegExp(
            /(\b(?:class|enum|extends|implements|instanceof|interface|new|record|throws)\s+)/
              .source +
              classNamePrefix +
              /[A-Z]\w*\b/.source
          ),
          lookbehind: true,
          inside: className.inside
        }
      ],
      keyword: keywords,
      function: [
        Prism.languages.clike.function,
        {
          pattern: /(::\s*)[a-z_]\w*/,
          lookbehind: true
        }
      ],
      number:
        /\b0b[01][01_]*L?\b|\b0x(?:\.[\da-f_p+-]+|[\da-f_]+(?:\.[\da-f_p+-]+)?)\b|(?:\b\d[\d_]*(?:\.[\d_]*)?|\B\.\d[\d_]*)(?:e[+-]?\d[\d_]*)?[dfl]?/i,
      operator: {
        pattern:
          /(^|[^.])(?:<<=?|>>>?=?|->|--|\+\+|&&|\|\||::|[?:~]|[-+*/%&|^!=<>]=?)/m,
        lookbehind: true
      },
      constant: /\b[A-Z][A-Z_\d]+\b/
    })
    Prism.languages.insertBefore('java', 'string', {
      'triple-quoted-string': {
        // http://openjdk.java.net/jeps/355#Description
        pattern: /"""[ \t]*[\r\n](?:(?:"|"")?(?:\\.|[^"\\]))*"""/,
        greedy: true,
        alias: 'string'
      },
      char: {
        pattern: /'(?:\\.|[^'\\\r\n]){1,6}'/,
        greedy: true
      }
    })
    Prism.languages.insertBefore('java', 'class-name', {
      annotation: {
        pattern: /(^|[^.])@\w+(?:\s*\.\s*\w+)*/,
        lookbehind: true,
        alias: 'punctuation'
      },
      generics: {
        pattern:
          /<(?:[\w\s,.?]|&(?!&)|<(?:[\w\s,.?]|&(?!&)|<(?:[\w\s,.?]|&(?!&)|<(?:[\w\s,.?]|&(?!&))*>)*>)*>)*>/,
        inside: {
          'class-name': className,
          keyword: keywords,
          punctuation: /[<>(),.:]/,
          operator: /[?&|]/
        }
      },
      import: [
        {
          pattern: RegExp(
            /(\bimport\s+)/.source +
              classNamePrefix +
              /(?:[A-Z]\w*|\*)(?=\s*;)/.source
          ),
          lookbehind: true,
          inside: {
            namespace: className.inside.namespace,
            punctuation: /\./,
            operator: /\*/,
            'class-name': /\w+/
          }
        },
        {
          pattern: RegExp(
            /(\bimport\s+static\s+)/.source +
              classNamePrefix +
              /(?:\w+|\*)(?=\s*;)/.source
          ),
          lookbehind: true,
          alias: 'static',
          inside: {
            namespace: className.inside.namespace,
            static: /\b\w+$/,
            punctuation: /\./,
            operator: /\*/,
            'class-name': /\w+/
          }
        }
      ],
      namespace: {
        pattern: RegExp(
          /(\b(?:exports|import(?:\s+static)?|module|open|opens|package|provides|requires|to|transitive|uses|with)\s+)(?!<keyword>)[a-z]\w*(?:\.[a-z]\w*)*\.?/.source.replace(
            /<keyword>/g,
            function () {
              return keywords.source
            }
          )
        ),
        lookbehind: true,
        inside: {
          punctuation: /\./
        }
      }
    })
  })(Prism)
}