<?php
/* vim: set expandtab tabstop=4 shiftwidth=4 softtabstop=4: */
/**
 * Keep a single empty line where empty lines can be found
 *
 * PHP version 5
 *
 * LICENSE: This source file is subject to version 3.0 of the PHP license
 * that is available through the world-wide-web at the following URI:
 * http://www.php.net/license/3_0.txt.  If you did not receive a copy of
 * the PHP License and are unable to obtain it through the web, please
 * send a note to license@php.net so we can mail you a copy immediately.
 *
 * @category   PHP
 * @package    PHP_Beautifier
 * @subpackage Filter
 * @author     Elod Csirmaz <https://github.com/csirmaz>
 * @copyright  2014 Elod Csirmaz
 * @license    http://www.php.net/license/3_0.txt  PHP License 3.0
 * @version    1.0
 * @link       http://pear.php.net/package/PHP_Beautifier
 * @link       http://beautifyphp.sourceforge.net
 */
/**
 * Keep a single empty line where empty lines can be found
 *
 * @category   PHP
 * @package    PHP_Beautifier
 * @subpackage Filter
 * @author     Elod Csirmaz <https://github.com/csirmaz>
 * @copyright  2014 Elod Csirmaz
 * @license    http://www.php.net/license/3_0.txt  PHP License 3.0
 * @version    1.0
 * @link       http://pear.php.net/package/PHP_Beautifier
 * @link       http://beautifyphp.sourceforge.net
 */
class PHP_Beautifier_Filter_KeepEmptyLines extends PHP_Beautifier_Filter
{
    protected $sDescription = 'Keep a single empty line where empty lines can be found';
    public function __construct(PHP_Beautifier $oBeaut, $aSettings = array())
    {
        parent::__construct($oBeaut, $aSettings);
        $this->oBeaut->setNoDeletePreviousSpaceHack();
    }
    public function t_whitespace($sTag)
    {
        if (preg_match('/\n\s*\r?\n/', $sTag)) {
            $this->oBeaut->removeWhitespace();
            $this->oBeaut->aOut[count($this->oBeaut->aOut) - 1].= "\n/**ndps**/\n"; // see setNoDeletePreviousSpaceHack
            $this->oBeaut->addIndent();
        }
    }
}
?>