<?php

/**
 * Create DOCX from RTF file
 *
 * @category   Phpdocx
 * @package    elements
 * @package    transform
 * @copyright  Copyright (c) 2009-2013 Narcea Producciones Multimedia S.L.
 *             (http://www.2mdc.com)
 * @license    http://www.phpdocx.com/wp-content/themes/lightword/pro_license.php
 * @version    05.24.2011
 * @link       http://www.phpdocx.com
 * @since      File available since Release 2.3
 */

/**
 * Create DOCX from RTF file
 *
 * @category   Phpdocx
 * @package    elements
 * @package    transform
 * @copyright  Copyright (c) 2009-2013 Narcea Producciones Multimedia S.L.
 *             (http://www.2mdc.com)
 * @license    http://www.phpdocx.com/wp-content/themes/lightword/pro_license.php
 * @version    05.24.2011
 * @link       http://www.phpdocx.com
 * @since      Class available since Release 2.3
 */
class EmbedRTF extends CreateElement implements EmbedDocument
{
    /**
     *
     * @access private
     * @var int
     */
    private $_id = 0;
    /**
     *
     * @access private
     * @var string
     */
    private static $_instance = NULL;
    /**
     *
     * @access protected
     * @var string
     */
    protected $_xml = '';

    /**
     * Construct
     *
     * @access public
     */
    public function __construct()
    {

    }

    /**
     * Destruct
     *
     * @access public
     */
    public function __destruct()
    {

    }

    /**
     * Magic method, returns current XML
     *
     * @access public
     * @return string Return current XML
     */
    public function __toString()
    {
        return $this->_xml;
    }

    /**
     * Singleton, return instance of class
     *
     * @access public
     * @return CreateText
     * @static
     */
    public static function getInstance()
    {
        if (self::$_instance == NULL) {
            self::$_instance = new EmbedRTF();
        }
        return self::$_instance;
    }
    
    /**
     * Getter. Return current HTML ID
     *
     * @access public
     * @return int
     */
    public function getId()
    {
        return $this->_id;
    }

    /**
     * Embed HTML in DOCX
     *
     * @access public
     */
    public function embed()
    {
        $this->_xml = '';
        $this->_id++;
        $this->generateALTCHUNK();
    }

    /**
     * Generate w:altChunk
     *
     * @access protected
     */
    public function generateALTCHUNK()
    {
        $this->_xml = '<' . CreateElement::NAMESPACEWORD .
                    ':altChunk r:id="rRTFId' . $this->_id . '" ' .
                     'xmlns:r="http://schemas.openxmlformats.org/' .
                     'officeDocument/2006/relationships" ' .
                     'xmlns:w="http://schemas.openxmlformats.org/' .
                     'wordprocessingml/2006/main" />';
    }

}