Tries to expand gradient outside CSS value
@param {IEmmetEditor} editor
@param {String} syntax
function expandGradientOutsideValue(editor, syntax) {
		var propertyName = prefs.get('css.gradient.defaultProperty');
		
		if (!propertyName)
			return false;
		
		// assuming that gradient definition is written on new line,
		// do a simplified parsing
		var content = String(editor.getContent());
		/** @type Range */
		var lineRange = require('range').create(editor.getCurrentLineRange());
		
		// get line content and adjust range with padding
		var line = lineRange.substring(content)
			.replace(/^\s+/, function(pad) {
				lineRange.start += pad.length;
				return '';
			})
			.replace(/\s+$/, function(pad) {
				lineRange.end -= pad.length;
				return '';
			});
		
		var css = require('cssResolver');
		var gradient = module.parse(line);
		if (gradient) {
			var props = getPropertiesForGradient(gradient, propertyName);
			props.push({
				name: propertyName,
				value: module.toString(gradient) + '${2}'
			});
			
			var sep = css.getSyntaxPreference('valueSeparator', syntax);
			var end = css.getSyntaxPreference('propertyEnd', syntax);
			
			if (require('preferences').get('css.alignVendor')) {
				var pads = require('utils').getStringsPads(_.map(props, function(prop) {
					return prop.value.substring(0, prop.value.indexOf('('));
				}));
				_.each(props, function(prop, i) {
					prop.value = pads[i] + prop.value;
				});
			}
			
			props = _.map(props, function(item) {
				return item.name + sep + item.value + end;
			});
			
			editor.replaceContent(props.join('\n'), lineRange.start, lineRange.end);
			return true;
		}
		
		return false;
	}