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<?php
/**
 * PHPExcel
 *
 * Copyright (c) 2006 - 2013 PHPExcel
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
 *
 * @category   PHPExcel
 * @package    PHPExcel_Shared_Escher
 * @copyright  Copyright (c) 2006 - 2013 PHPExcel (http://www.codeplex.com/PHPExcel)
 * @license    http://www.gnu.org/licenses/old-licenses/lgpl-2.1.txt    LGPL
 * @version    ##VERSION##, ##DATE##
 */

/**
 * PHPExcel_Shared_Escher_DgContainer_SpgrContainer
 *
 * @category   PHPExcel
 * @package    PHPExcel_Shared_Escher
 * @copyright  Copyright (c) 2006 - 2013 PHPExcel (http://www.codeplex.com/PHPExcel)
 */
class PHPExcel_Shared_Escher_DgContainer_SpgrContainer
{
        /**
         * Parent Shape Group Container
         *
         * @var PHPExcel_Shared_Escher_DgContainer_SpgrContainer
         */
        private $_parent;

        /**
         * Shape Container collection
         *
         * @var array
         */
        private $_children = array();

        /**
         * Set parent Shape Group Container
         *
         * @param PHPExcel_Shared_Escher_DgContainer_SpgrContainer $parent
         */
        public function setParent($parent)
        {
                $this->_parent = $parent;
        }

        /**
         * Get the parent Shape Group Container if any
         *
         * @return PHPExcel_Shared_Escher_DgContainer_SpgrContainer|null
         */
        public function getParent()
        {
                return $this->_parent;
        }

        /**
         * Add a child. This will be either spgrContainer or spContainer
         *
         * @param mixed $child
         */
        public function addChild($child)
        {
                $this->_children[] = $child;
                $child->setParent($this);
        }

        /**
         * Get collection of Shape Containers
         */
        public function getChildren()
        {
                return $this->_children;
        }

        /**
         * Recursively get all spContainers within this spgrContainer
         *
         * @return PHPExcel_Shared_Escher_DgContainer_SpgrContainer_SpContainer[]
         */
        public function getAllSpContainers()
        {
                $allSpContainers = array();

                foreach ($this->_children as $child) {
                        if ($child instanceof PHPExcel_Shared_Escher_DgContainer_SpgrContainer) {
                                $allSpContainers = array_merge($allSpContainers, $child->getAllSpContainers());
                        } else {
                                $allSpContainers[] = $child;
                        }
                }

                return $allSpContainers;
        }
}