当前路径：Classes/PHPExcel/Writer/Excel5/Escher.php
<?php
/**
 * PHPExcel
 *
 * Copyright (c) 2006 - 2015 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_Writer_Excel5
 * @copyright  Copyright (c) 2006 - 2015 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_DggContainer_BstoreContainer
 *
 * @category   PHPExcel
 * @package    PHPExcel_Writer_Excel5
 * @copyright  Copyright (c) 2006 - 2015 PHPExcel (http://www.codeplex.com/PHPExcel)
 */
class PHPExcel_Writer_Excel5_Escher
{
    /**
     * The object we are writing
     */
    private $object;

    /**
     * The written binary data
     */
    private $data;

    /**
     * Shape offsets. Positions in binary stream where a new shape record begins
     *
     * @var array
     */
    private $spOffsets;

    /**
     * Shape types.
     *
     * @var array
     */
    private $spTypes;
    
    /**
     * Constructor
     *
     * @param mixed
     */
    public function __construct($object)
    {
        $this->object = $object;
    }

    /**
     * Process the object to be written
     */
    public function close()
    {
        // initialize
        $this->data = '';

        switch (get_class($this->object)) {
            case 'PHPExcel_Shared_Escher':
                if ($dggContainer = $this->object->getDggContainer()) {
                    $writer = new PHPExcel_Writer_Excel5_Escher($dggContainer);
                    $this->data = $writer->close();
                } elseif ($dgContainer = $this->object->getDgContainer()) {
                    $writer = new PHPExcel_Writer_Excel5_Escher($dgContainer);
                    $this->data = $writer->close();
                    $this->spOffsets = $writer->getSpOffsets();
                    $this->spTypes = $writer->getSpTypes();
                }
                break;
            case 'PHPExcel_Shared_Escher_DggContainer':
                // this is a container record

                // initialize
                $innerData = '';

                // write the dgg
                $recVer            = 0x0;
                $recInstance    = 0x0000;
                $recType        = 0xF006;

                $recVerInstance  = $recVer;
                $recVerInstance |= $recInstance << 4;

                // dgg data
                $dggData =
                    pack(
                        'VVVV',
                        $this->object->getSpIdMax(), // maximum shape identifier increased by one
                        $this->object->getCDgSaved() + 1, // number of file identifier clusters increased by one
                        $this->object->getCSpSaved(),
                        $this->object->getCDgSaved() // count total number of drawings saved
                    );

                // add file identifier clusters (one per drawing)
                $IDCLs = $this->object->getIDCLs();

                foreach ($IDCLs as $dgId => $maxRed...