Returns ranges of class names in "class" attribute value
@param {String} className
@returns {Array}
function classNameRanges(className, offset) {
		offset = offset || 0;
		var result = [];
		/** @type StringStream */
		var stream = require('stringStream').create(className);
		var range = require('range');
		
		// skip whitespace
		stream.eatSpace();
		stream.start = stream.pos;
		
		var ch;
		while (ch = stream.next()) {
			if (/[\s\u00a0]/.test(ch)) {
				result.push(range.create(stream.start + offset, stream.pos - stream.start - 1));
				stream.eatSpace();
				stream.start = stream.pos;
			}
		}
		
		result.push(range.create(stream.start + offset, stream.pos - stream.start));
		return result;
	}