prism-sass.js

(function(Prism) {
	Prism.languages.sass = Prism.languages.extend('css', {
		// Sass comments don't need to be closed, only indented
		'comment': {
			pattern: /^([ \t]*)\/[\/*].*(?:(?:\r?\n|\r)\1[ \t]+.+)*/m,
			lookbehind: true
		}
	});

	Prism.languages.insertBefore('sass', 'atrule', {
		// We want to consume the whole line
		'atrule-line': {
			// Includes support for = and + shortcuts
			pattern: /^(?:[ \t]*)[@+=].+/m,
			inside: {
				'atrule': /(?:@[\w-]+|[+=])/m
			}
		}
	});
	delete Prism.languages.sass.atrule;


	var variable = /\$[-\w]+|#\{\$[-\w]+\}/;
	var operator = [
		/[+*\/%]|[=!]=|<=?|>=?|\b(?:and|or|not)\b/,
		{
			pattern: /(\s+)-(?=\s)/,
			lookbehind: true
		}
	];

	Prism.languages.insertBefore('sass', 'property', {
		// We want to consume the whole line
		'variable-line': {
			pattern: /^[ \t]*\$.+/m,
			inside: {
				'punctuation': /:/,
				'variable': variable,
				'operator': operator
			}
		},
		// We want to consume the whole line
		'property-line': {
			pattern: /^[ \t]*(?:[^:\s]+ *:.*|:[^:\s]+.*)/m,
			inside: {
				'property': [
					/[^:\s]+(?=\s*:)/,
					{
						pattern: /(:)[^:\s]+/,
						lookbehind: true
					}
				],
				'punctuation': /:/,
				'variable': variable,
				'operator': operator,
				'important': Prism.languages.sass.important
			}
		}
	});
	delete Prism.languages.sass.property;
	delete Prism.languages.sass.important;

	// Now that whole lines for other patterns are consumed,
	// what's left should be selectors
	Prism.languages.insertBefore('sass', 'punctuation', {
		'selector': {
			pattern: /([ \t]*)\S(?:,[^,\r\n]+|[^,\r\n]*)(?:,[^,\r\n]+)*(?:,(?:\r?\n|\r)\1[ \t]+\S(?:,[^,\r\n]+|[^,\r\n]*)(?:,[^,\r\n]+)*)*/,
			lookbehind: true
		}
	});

}(Prism));