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sources/3rdparty/phpdocx/classes/CreateMath.inc 3.02 KB
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  <?php
  
  /**
   * Add a math eq
   *
   * @category   Phpdocx
   * @package    elements
   * @copyright  Copyright (c) Narcea Producciones Multimedia S.L.
   *             (http://www.2mdc.com)
   * @license    LGPL
   * @version    3.0
   * @link       http://www.phpdocx.com
   * @since      File available since Release 3.0
   */
  include_once dirname(__FILE__) . '/CreateElement.inc';
  
  class CreateMath extends CreateElement
  {
  
      /**
       *
       * @access private
       * @static
       */
      private static $_instance = null;
      /**
       *
       * @access private
       * @var string
       */
      private $_mathML;
  
      /**
       * Construct
       *
       * @access public
       */
      public function __construct()
      {
  
      }
  
      /**
       * Destruct
       *
       * @access public
       */
      public function __destruct()
      {
  
      }
  
      /**
       * Magic method, returns current MathML
       *
       * @access public
       * @return string Return current MathML
       */
      public function __toString()
      {
          return $this->_mathML;
      }
  
      /**
       * Singleton, return instance of class
       *
       * @access public
       * @return CreateLink
       */
      public static function getInstance()
      {
          if (self::$_instance == NULL) {
              self::$_instance = new CreateMath();
          }
          return self::$_instance;
      }
  
      /**
       * Getter. Access to mathXML var
       *
       * @access public
       * @return string
       */
      public function getMathXML()
      {
          return $this->_mathML;
      }
  
  
      /**
       * Getter. Access to mathXML var
       *
       * @access public
       * @param string $mathML
       */
      public function setMathXML($mathML)
      {
          $this->_mathML = $mathML;
      }
  
      /**
       * Generate a new MathML eq
       *
       * @access public
       * @param string $arrArgs[0] Math eq
       */
      public function createMath()
      {
          $this->_xml = '';
          $arrArgs = func_get_args();
  
          $this->transformMath($arrArgs[0]);
      }
  
      /**
       * Transform a MathML eq using XSL
       *
       * @access protected
       * @param string $mathML Math eq
       */
      protected function transformMath($mathML)
      {
          $arrDeleteStrsMML = array('<mi>', '</mi>');
          $arrDeleteToStrsMML = array('<mn>', '</mn>');
          $mathML = str_replace($arrDeleteStrsMML, $arrDeleteToStrsMML, $mathML);
  
          $rscXML = new DOMDocument();
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  		$loadEntities = libxml_disable_entity_loader(true);
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          $rscXML->loadXML($mathML);
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  		libxml_disable_entity_loader($loadEntities);
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          $objXSLTProc = new XSLTProcessor();
          $objXSL = new DOMDocument();
          $objXSL->load('../xsl/MML2OMML_n.XSL');
          $objXSLTProc->importStylesheet($objXSL);
  
          $this->_mathML = $objXSLTProc->transformToXML($rscXML);
          $arrOMML = array('<?xml version="1.0" encoding="UTF-8"?>',
              ' xmlns:m="http://schemas.openxmlformats.org/officeDocument/2006/'
              . 'math" xmlns:mml="http://www.w3.org/1998/Math/MathML"');
          $arrToOMML = array('', '');
          $this->_mathML = str_replace($arrOMML, $arrToOMML, $this->_mathML);
      }
  
  }