<?php /* SVN FILE: $Id: SassDirectiveNode.php 118 2010-09-21 09:45:11Z chris.l.yates@gmail.com $ */ /**

* SassDirectiveNode class file.
* @author                      Chris Yates <chris.l.yates@gmail.com>
* @copyright   Copyright (c) 2010 PBM Web Development
* @license                     http://phamlp.googlecode.com/files/license.txt
* @package                     PHamlP
* @subpackage  Sass.tree
*/

/**

* SassDirectiveNode class.
* Represents a CSS directive.
* @package                     PHamlP
* @subpackage  Sass.tree
*/

class SassDirectiveNode extends SassNode {

const NODE_IDENTIFIER = '@';
const MATCH = '/^(@\w+)/';

/**
 * SassDirectiveNode.
 * @param object source token
 * @return SassDirectiveNode
 */
public function __construct($token) {
        parent::__construct($token);
}

protected function getDirective() {
        return self::extractDirective($this->token);
}

/**
 * Parse this node.
 * @param SassContext the context in which this node is parsed
 * @return array the parsed node
 */
public function parse($context) {
        $this->children = $this->parseChildren($context);
        return array($this);
}

/**
 * Render this node.
 * @return string the rendered node
 */
public function render() {
        $properties = array();
        foreach ($this->children as $child) {
                $properties[] = $child->render();
        } // foreach

        return $this->renderer->renderDirective($this, $properties);
}

/**
 * Returns a value indicating if the token represents this type of node.
 * @param object token
 * @return boolean true if the token represents this type of node, false if not
 */
public static function isa($token) {
        return $token->source[0] === self::NODE_IDENTIFIER;
}

/**
 * Returns the directive
 * @param object token
 * @return string the directive
 */
public static function extractDirective($token) {
        preg_match(self::MATCH, $token->source, $matches);
  return strtolower($matches[1]);
}

}