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当前路径:Classes/PHPExcel/Reader/Excel5/Escher.php
<?php

/**
 * PHPExcel_Reader_Excel5_Escher
 *
 * 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_Reader_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##
 */
class PHPExcel_Reader_Excel5_Escher
{
    const DGGCONTAINER      = 0xF000;
    const BSTORECONTAINER   = 0xF001;
    const DGCONTAINER       = 0xF002;
    const SPGRCONTAINER     = 0xF003;
    const SPCONTAINER       = 0xF004;
    const DGG               = 0xF006;
    const BSE               = 0xF007;
    const DG                = 0xF008;
    const SPGR              = 0xF009;
    const SP                = 0xF00A;
    const OPT               = 0xF00B;
    const CLIENTTEXTBOX     = 0xF00D;
    const CLIENTANCHOR      = 0xF010;
    const CLIENTDATA        = 0xF011;
    const BLIPJPEG          = 0xF01D;
    const BLIPPNG           = 0xF01E;
    const SPLITMENUCOLORS   = 0xF11E;
    const TERTIARYOPT       = 0xF122;

    /**
     * Escher stream data (binary)
     *
     * @var string
     */
    private $data;

    /**
     * Size in bytes of the Escher stream data
     *
     * @var int
     */
    private $dataSize;

    /**
     * Current position of stream pointer in Escher stream data
     *
     * @var int
     */
    private $pos;

    /**
     * The object to be returned by the reader. Modified during load.
     *
     * @var mixed
     */
    private $object;

    /**
     * Create a new PHPExcel_Reader_Excel5_Escher instance
     *
     * @param mixed $object
     */
    public function __construct($object)
    {
        $this->object = $object;
    }

    /**
     * Load Escher stream data. May be a partial Escher stream.
     *
     * @param string $data
     */
    public function load($data)
    {
        $this->data = $data;

        // total byte size of Excel data (workbook global substream + sheet substreams)
        $this->dataSize = strlen($this->data);

        $this->pos = 0;

        // Parse Escher stream
        while ($this->pos < $this->dataSize) {
            // offset: 2; size: 2: Record Type
            $fbt = PHPExcel_Reader_Excel5::getInt2d($this->data, $this->pos + 2);

            switch ($fbt) {
                case self::DGGCONTAINER:
                    $this->readDggContainer();
                    break;
                case self::DGG:
                    $this->readDgg();
                    break;
                case self::BSTORECONTAINER:
                    $this->readBstoreContainer();
                    break;
                case self::BSE:
                    $this->readBSE();
                    break;
                case self::BLIPJPEG:
                    $this->readBlipJPEG();
                    break;
                case self::BLIPPNG:
                    $this->readBlipPNG();
                    break;
                case self::OPT:
                    $this->readOPT();
                    break;
                case self::TERTIARYOPT:
                    $this->readTertiaryOPT();
                    break;
                case self::SPLITMENUCOLORS:
                    $this->readSplitMenuColors();
                    break;
                case self::DGCONTAINER:
                    $this->readDgContainer();
                    break;
                case self::DG:
                    $this->readDg();
                    break;
                case self::SPGRCONTAINER:
                    $this->readSpgrContainer();
                    break;
 ...
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