ThinkPHP/Library/Org/Util/PHPExcel/Settings.php

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<?php

/** PHPExcel root directory */
if (!defined('PHPEXCEL_ROOT')) {
    /**
     * @ignore
     */
    define('PHPEXCEL_ROOT', dirname(__FILE__) . '/../');
    require(PHPEXCEL_ROOT . 'PHPExcel/Autoloader.php');
}

/**
 * PHPExcel_Settings
 *
 * 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_Settings
 * @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_Settings
{
    /**    constants */
    /**    Available Zip library classes */
    const PCLZIP     = 'PHPExcel_Shared_ZipArchive';
    const ZIPARCHIVE = 'ZipArchive';

    /**    Optional Chart Rendering libraries */
    const CHART_RENDERER_JPGRAPH = 'jpgraph';

    /**    Optional PDF Rendering libraries */
    const PDF_RENDERER_TCPDF  = 'tcPDF';
    const PDF_RENDERER_DOMPDF = 'DomPDF';
    const PDF_RENDERER_MPDF   = 'mPDF';


    private static $chartRenderers = array(
        self::CHART_RENDERER_JPGRAPH,
    );

    private static $pdfRenderers = array(
        self::PDF_RENDERER_TCPDF,
        self::PDF_RENDERER_DOMPDF,
        self::PDF_RENDERER_MPDF,