Supervisor.php

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<?php
abstract class PHPExcel_Style_Supervisor
{
        protected $_isSupervisor;

        protected $_parent;

        public function __construct($isSupervisor = FALSE)
        {
                // Supervisor?
                $this->_isSupervisor = $isSupervisor;
        }

        public function bindParent($parent, $parentPropertyName=NULL)
        {
                $this->_parent = $parent;
                return $this;
        }

        public function getIsSupervisor()
        {
                return $this->_isSupervisor;
        }

        public function getActiveSheet()
        {
                return $this->_parent->getActiveSheet();
        }

        public function getSelectedCells()
        {
                return $this->getActiveSheet()->getSelectedCells();
        }

        public function getActiveCell()
        {
                return $this->getActiveSheet()->getActiveCell();
        }

        public function __clone() {
                $vars = get_object_vars($this);
                foreach ($vars as $key => $value) {
                        if ((is_object($value)) && ($key != '_parent')) {
                                $this->$key = clone $value;
                        } else {
                                $this->$key = $value;
                        }
                }
        }
}