prismjs/components/prism-java.js

(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));