当前路径：Classes/PHPExcel/Writer/Excel2007/Style.php
<?php

/**
 * PHPExcel_Writer_Excel2007_Style
 *
 * 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_Excel2007
 * @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_Writer_Excel2007_Style extends PHPExcel_Writer_Excel2007_WriterPart
{
    /**
     * Write styles to XML format
     *
     * @param     PHPExcel    $pPHPExcel
     * @return     string         XML Output
     * @throws     PHPExcel_Writer_Exception
     */
    public function writeStyles(PHPExcel $pPHPExcel = null)
    {
        // Create XML writer
        $objWriter = null;
        if ($this->getParentWriter()->getUseDiskCaching()) {
            $objWriter = new PHPExcel_Shared_XMLWriter(PHPExcel_Shared_XMLWriter::STORAGE_DISK, $this->getParentWriter()->getDiskCachingDirectory());
        } else {
            $objWriter = new PHPExcel_Shared_XMLWriter(PHPExcel_Shared_XMLWriter::STORAGE_MEMORY);
        }

        // XML header
        $objWriter->startDocument('1.0', 'UTF-8', 'yes');

        // styleSheet
        $objWriter->startElement('styleSheet');
        $objWriter->writeAttribute('xml:space', 'preserve');
        $objWriter->writeAttribute('xmlns', 'http://schemas.openxmlformats.org/spreadsheetml/2006/main');

        // numFmts
        $objWriter->startElement('numFmts');
        $objWriter->writeAttribute('count', $this->getParentWriter()->getNumFmtHashTable()->count());

        // numFmt
        for ($i = 0; $i < $this->getParentWriter()->getNumFmtHashTable()->count(); ++$i) {
            $this->writeNumFmt($objWriter, $this->getParentWriter()->getNumFmtHashTable()->getByIndex($i), $i);
        }

        $objWriter->endElement();

        // fonts
        $objWriter->startElement('fonts');
        $objWriter->writeAttribute('count', $this->getParentWriter()->getFontHashTable()->count());

        // font
        for ($i = 0; $i < $this->getParentWriter()->getFontHashTable()->count(); ++$i) {
            $this->writeFont($objWriter, $this->getParentWriter()->getFontHashTable()->getByIndex($i));
        }

        $objWriter->endElement();

        // fills
        $objWriter->startElement('fills');
        $objWriter->writeAttribute('count', $this->getParentWriter()->getFillHashTable()->count());

        // fill
        for ($i = 0; $i < $this->getParentWriter()->getFillHashTable()->count(); ++$i) {
            $this->writeFill($objWriter, $this->getParentWriter()->getFillHashTable()->getByIndex($i));
        }

        $objWriter->endElement();

        // borders
        $objWriter->startElement('borders');
        $objWriter->writeAttribute('count', $this->getParentWriter()->getBordersHashTable()->count());

        // border
        for ($i = 0; $i < $this->getParentWriter()->getBordersHashTable()->count(); ++$i) {
            $this->writeBorder($objWriter, $this->getParentWriter()->getBordersHashTable()->getByIndex($i));
        }

        $objWriter->endElement();

        // cellStyleXfs
        $objWriter->startElement('cellStyleXfs');
        $objWriter->writeAttribute('count', 1);

        // xf
        $objWriter->startElement('xf');
        $objWriter->writeAttribute('numFmtId', 0);
        $objWriter->writeAttribute('fontId', 0);
        $objWriter->writeAttribute('fillId', 0);
        $objWriter->writeAttribute('borderId', 0);
        $objWriter->endElement();

        $objWriter->endElement();

        // cellXfs
        $objWriter->startElement('cellXfs');
        $objWriter->writeAttribute('count', count($pPHPExcel->getCellXfCollection()));

        // xf
        foreach ($pPHPExcel->getCellXfCollection() as $cellXf) {
            $this->writeCellStyleXf($objWriter, $cellXf, $pPHPExcel);
        }

        $objWriter->endElement();

        // cellStyles
        $objWriter->startElement('cellStyles');
        $objWriter->writeAttribute('count', 1);

        // cellStyle
        $objWriter->startElement('cellStyle');
        $objWriter->writeAttribute('name', 'Normal');
        $objWriter->writeAttribute('xfId', 0);
        $objWriter->writeAttribute('builtinId', 0);
        $objWriter->endElement();

        $objWriter->endElement();

        // dxfs
        $objWriter->startElement('dxfs');
        $objWriter->writeAttribute('count', $this->getParentWriter()->getStylesConditionalHashTable()->count());

        // dxf
        for ($i = 0; $i < $this->getParentWriter()->getStylesConditionalHashTable()->count(); ++$i) {
            $this->writeCellStyleDxf($objWriter, $this->getParentWriter()->getStylesConditionalHashTable()->getByIndex($i)->getStyle());
        }

        $objWriter->endElement();

        // tableStyles
        $objWriter->startElement('tableStyles');
        $o...