reprism/src/languages/groovy.js

Modular Syntax highlighting for the web

export default {
  language: 'groovy',
  init: Prism => {
    Prism.languages.groovy = Prism.languages.extend('clike', {
      keyword: /\b(?:as|def|in|abstract|assert|boolean|break|byte|case|catch|char|class|const|continue|default|do|double|else|enum|extends|final|finally|float|for|goto|if|implements|import|instanceof|int|interface|long|native|new|package|private|protected|public|return|short|static|strictfp|super|switch|synchronized|this|throw|throws|trait|transient|try|void|volatile|while)\b/,
      string: [
        {
          pattern: /("""|''')[\s\S]*?\1|(?:\$\/)(?:\$\/\$|[\s\S])*?\/\$/,
          greedy: true,
        },
        {
          pattern: /(["'\/])(?:\\.|(?!\1)[^\\\r\n])*\1/,
          greedy: true,
        },
      ],
      number: /\b(?:0b[01_]+|0x[\da-f_]+(?:\.[\da-f_p\-]+)?|[\d_]+(?:\.[\d_]+)?(?:e[+-]?[\d]+)?)[glidf]?\b/i,
      operator: {
        pattern: /(^|[^.])(?:~|==?~?|\?[.:]?|\*(?:[.=]|\*=?)?|\.[@&]|\.\.<|\.{1,2}(?!\.)|-[-=>]?|\+[+=]?|!=?|<(?:<=?|=>?)?|>(?:>>?=?|=)?|&[&=]?|\|[|=]?|\/=?|\^=?|%=?)/,
        lookbehind: true,
      },
      punctuation: /\.+|[{}[\];(),:$]/,
    })

    Prism.languages.insertBefore('groovy', 'string', {
      shebang: {
        pattern: /#!.+/,
        alias: 'comment',
      },
    })

    Prism.languages.insertBefore('groovy', 'punctuation', {
      'spock-block': /\b(?:setup|given|when|then|and|cleanup|expect|where):/,
    })

    Prism.languages.insertBefore('groovy', 'function', {
      annotation: {
        alias: 'punctuation',
        pattern: /(^|[^.])@\w+/,
        lookbehind: true,
      },
    })

    // Handle string interpolation
    Prism.hooks.add('wrap', env => {
      if (env.language === 'groovy' && env.type === 'string') {
        const delimiter = env.content[0]

        if (delimiter != "'") {
          let pattern = /([^\\])(?:\$(?:\{.*?\}|[\w.]+))/
          if (delimiter === '$') {
            pattern = /([^\$])(?:\$(?:\{.*?\}|[\w.]+))/
          }

          // To prevent double HTML-encoding we have to decode env.content first
          env.content = env.content
            .replace(/&lt;/g, '<')
            .replace(/&amp;/g, '&')

          env.content = Prism.highlight(env.content, {
            expression: {
              pattern,
              lookbehind: true,
              inside: Prism.languages.groovy,
            },
          })

          env.classes.push(delimiter === '/' ? 'regex' : 'gstring')
        }
      }
    })
  },
}