<?php

/**

 * PHPExcel

 *

 * Copyright (c) 2006 - 2014 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_Excel5

 * @copyright  Copyright (c) 2006 - 2014 PHPExcel (http://www.codeplex.com/PHPExcel)

 * @license    http://www.gnu.org/licenses/old-licenses/lgpl-2.1.txt	LGPL

 * @version    1.8.0, 2014-03-02

 */



// Original file header of PEAR::Spreadsheet_Excel_Writer_Workbook (used as the base for this class):

// -----------------------------------------------------------------------------------------

// /*

// *  Module written/ported by Xavier Noguer <xnoguer@rezebra.com>

// *

// *  The majority of this is _NOT_ my code.  I simply ported it from the

// *  PERL Spreadsheet::WriteExcel module.

// *

// *  The author of the Spreadsheet::WriteExcel module is John McNamara

// *  <jmcnamara@cpan.org>

// *

// *  I _DO_ maintain this code, and John McNamara has nothing to do with the

// *  porting of this code to PHP.  Any questions directly related to this

// *  class library should be directed to me.

// *

// *  License Information:

// *

// *    Spreadsheet_Excel_Writer:  A library for generating Excel Spreadsheets

// *    Copyright (c) 2002-2003 Xavier Noguer xnoguer@rezebra.com

// *

// *    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., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA

// */





/**

 * PHPExcel_Writer_Excel5_Workbook

 *

 * @category   PHPExcel

 * @package    PHPExcel_Writer_Excel5

 * @copyright  Copyright (c) 2006 - 2014 PHPExcel (http://www.codeplex.com/PHPExcel)

 */

class PHPExcel_Writer_Excel5_Workbook extends PHPExcel_Writer_Excel5_BIFFwriter

{

	/**

	 * Formula parser

	 *

	 * @var PHPExcel_Writer_Excel5_Parser

	 */

	private $_parser;



	/**

	 * The BIFF file size for the workbook.

	 * @var integer

	 * @see _calcSheetOffsets()

	 */

	public $_biffsize;



	/**

	 * XF Writers

	 * @var PHPExcel_Writer_Excel5_Xf[]

	 */

	private $_xfWriters = array();



	/**

	 * Array containing the colour palette

	 * @var array

	 */

	public $_palette;



	/**

	 * The codepage indicates the text encoding used for strings

	 * @var integer

	 */

	public $_codepage;



	/**

	 * The country code used for localization

	 * @var integer

	 */

	public $_country_code;



	/**

	 * Workbook

	 * @var PHPExcel

	 */

	private $_phpExcel;



	/**

	 * Fonts writers

	 *

	 * @var PHPExcel_Writer_Excel5_Font[]

	 */

	private $_fontWriters = array();



	/**

	 * Added fonts. Maps from font's hash => index in workbook

	 *

	 * @var array

	 */

	private $_addedFonts = array();



	/**

	 * Shared number formats

	 *

	 * @var array

	 */

	private $_numberFormats = array();



	/**

	 * Added number formats. Maps from numberFormat's hash => index in workbook

	 *

	 * @var array

	 */

	private $_addedNumberFormats = array();



	/**

	 * Sizes of the binary worksheet streams

	 *

	 * @var array

	 */

	private $_worksheetSizes = array();



	/**

	 * Offsets of the binary worksheet streams relative to the start of the global workbook stream

	 *

	 * @var array

	 */

	private $_worksheetOffsets = array();



	/**

	 * Total number of shared strings in workbook

	 *

	 * @var int

	 */

	private $_str_total;



	/**

	 * Number of unique shared strings in workbook

	 *

	 * @var int

	 */

	private $_str_unique;



	/**

	 * Array of unique shared strings in workbook

	 *

	 * @var array

	 */

	private $_str_table;



	/**

	 * Color cache

	 */

	private $_colors;



	/**

	 * Escher object corresponding to MSODRAWINGGROUP

	 *

	 * @var PHPExcel_Shared_Escher

	 */

	private $_escher;





	/**

	 * Class constructor

	 *

	 * @param PHPExcel	$phpExcel		The Workbook

	 * @param int		&$str_total		Total number of strings

	 * @param int		&$str_unique	Total number of unique strings

	 * @param array		&$str_table		String Table

	 * @param array		&$colors		Colour Table

	 * @param mixed		$parser			The formula parser created for the Workbook

	 */

	public function __construct(PHPExcel $phpExcel = null,

								&$str_total, &$str_unique, &$str_table, &$colors,

								$parser )

	{

		// It needs to call its parent's constructor explicitly

		parent::__construct();



		$this->_parser           = $parser;

		$this->_biffsize         = 0;

		$this->_palette          = array();

		$this->_country_code     = -1;



		$this->_str_total       = &$str_total;

		$this->_str_unique      = &$str_unique;

		$this->_str_table       = &$str_table;

		$this->_colors          = &$colors;

		$this->_setPaletteXl97();



		$this->_phpExcel = $phpExcel;



		// set BIFFwriter limit for CONTINUE records

		//		$this->_limit = 8224;

		$this->_codepage = 0x04B0;



		// Add empty sheets and Build color cache

		$countSheets = $phpExcel->getSheetCount();

		for ($i = 0; $i < $countSheets; ++$i) {

			$phpSheet = $phpExcel->getSheet($i);



			$this->_parser->setExtSheet($phpSheet->getTitle(), $i);  // Register worksheet name with parser



			$supbook_index = 0x00;

			$ref = pack('vvv', $supbook_index, $i, $i);

			$this->_parser->_references[] = $ref;  // Register reference with parser



			// Sheet tab colors?

			if ($phpSheet->isTabColorSet()) {

				$this->_addColor($phpSheet->getTabColor()->getRGB());

			}

		}



	}



	/**

	 * Add a new XF writer

	 *

	 * @param PHPExcel_Style

	 * @param boolean Is it a style XF?

	 * @return int Index to XF record

	 */

	public function addXfWriter($style, $isStyleXf = false)

	{

		$xfWriter = new PHPExcel_Writer_Excel5_Xf($style);

		$xfWriter->setIsStyleXf($isStyleXf);



		// Add the font if not already added

		$fontIndex = $this->_addFont($style->getFont());



		// Assign the font index to the xf record

		$xfWriter->setFontIndex($fontIndex);



		// Background colors, best to treat these after the font so black will come after white in custom palette

		$xfWriter->setFgColor($this->_addColor($style->getFill()->getStartColor()->getRGB()));

		$xfWriter->setBgColor($this->_addColor($style->getFill()->getEndColor()->getRGB()));

		$xfWriter->setBottomColor($this->_addColor($style->getBorders()->getBottom()->getColor()->getRGB()));

		$xfWriter->setTopColor($this->_addColor($style->getBorders()->getTop()->getColor()->getRGB()));

		$xfWriter->setRightColor($this->_addColor($style->getBorders()->getRight()->getColor()->getRGB()));

		$xfWriter->setLeftColor($this->_addColor($style->getBorders()->getLeft()->getColor()->getRGB()));

		$xfWriter->setDiagColor($this->_addColor($style->getBorders()->getDiagonal()->getColor()->getRGB()));



		// Add the number format if it is not a built-in one and not already added

		if ($style->getNumberFormat()->getBuiltInFormatCode() === false) {

			$numberFormatHashCode = $style->getNumberFormat()->getHashCode();



			if (isset($this->_addedNumberFormats[$numberFormatHashCode])) {

				$numberFormatIndex = $this->_addedNumberFormats[$numberFormatHashCode];

			} else {

				$numberFormatIndex = 164 + count($this->_numberFormats);

				$this->_numberFormats[$numberFormatIndex] = $style->getNumberFormat();

				$this->_addedNumberFormats[$numberFormatHashCode] = $numberFormatIndex;

			}

		} else {

			$numberFormatIndex = (int) $style->getNumberFormat()->getBuiltInFormatCode();

		}



		// Assign the number format index to xf record

		$xfWriter->setNumberFormatIndex($numberFormatIndex);



		$this->_xfWriters[] = $xfWriter;



		$xfIndex = count($this->_xfWriters) - 1;

		return $xfIndex;

	}



	/**

	 * Add a font to added fonts

	 *

	 * @param PHPExcel_Style_Font $font

	 * @return int Index to FONT record

	 */

	public function _addFont(PHPExcel_Style_Font $font)

	{

		$fontHashCode = $font->getHashCode();

		if(isset($this->_addedFonts[$fontHashCode])){

			$fontIndex = $this->_addedFonts[$fontHashCode];

		} else {

			$countFonts = count($this->_fontWriters);

			$fontIndex = ($countFonts < 4) ? $countFonts : $countFonts + 1;



			$fontWriter = new PHPExcel_Writer_Excel5_Font($font);

			$fontWriter->setColorIndex($this->_addColor($font->getColor()->getRGB()));

			$this->_fontWriters[] = $fontWriter;



			$this->_addedFonts[$fontHashCode] = $fontIndex;

		}

		return $fontIndex;

	}



	/**

	 * Alter color palette adding a custom color

	 *

	 * @param string $rgb E.g. 'FF00AA'

	 * @return int Color index

	 */

	private function _addColor($rgb) {

		if (!isset($this->_colors[$rgb])) {

			if (count($this->_colors) < 57) {

				// then we add a custom color altering the palette

				$colorIndex = 8 + count($this->_colors);

				$this->_palette[$colorIndex] =

					array(

						hexdec(substr($rgb, 0, 2)),

						hexdec(substr($rgb, 2, 2)),

						hexdec(substr($rgb, 4)),

						0

					);

				$this->_colors[$rgb] = $colorIndex;

			} else {

				// no room for more custom colors, just map to black

				$colorIndex = 0;

			}

		} else {

			// fetch already added custom color

			$colorIndex = $this->_colors[$rgb];

		}



		return $colorIndex;

	}



	/**

	 * Sets the colour palette to the Excel 97+ default.

	 *

	 * @access private

	 */

	function _setPaletteXl97()

	{

		$this->_palette = array(

			0x08 => array(0x00, 0x00, 0x00, 0x00),

			0x09 => array(0xff, 0xff, 0xff, 0x00),

			0x0A => array(0xff, 0x00, 0x00, 0x00),

			0x0B => array(0x00, 0xff, 0x00, 0x00),

			0x0C => array(0x00, 0x00, 0xff, 0x00),

			0x0D => array(0xff, 0xff, 0x00, 0x00),

			0x0E => array(0xff, 0x00, 0xff, 0x00),

			0x0F => array(0x00, 0xff, 0xff, 0x00),

			0x10 => array(0x80, 0x00, 0x00, 0x00),

			0x11 => array(0x00, 0x80, 0x00, 0x00),

			0x12 => array(0x00, 0x00, 0x80, 0x00),

			0x13 => array(0x80, 0x80, 0x00, 0x00),

			0x14 => array(0x80, 0x00, 0x80, 0x00),

			0x15 => array(0x00, 0x80, 0x80, 0x00),

			0x16 => array(0xc0, 0xc0, 0xc0, 0x00),

			0x17 => array(0x80, 0x80, 0x80, 0x00),

			0x18 => array(0x99, 0x99, 0xff, 0x00),

			0x19 => array(0x99, 0x33, 0x66, 0x00),

			0x1A => array(0xff, 0xff, 0xcc, 0x00),

			0x1B => array(0xcc, 0xff, 0xff, 0x00),

			0x1C => array(0x66, 0x00, 0x66, 0x00),

			0x1D => array(0xff, 0x80, 0x80, 0x00),

			0x1E => array(0x00, 0x66, 0xcc, 0x00),

			0x1F => array(0xcc, 0xcc, 0xff, 0x00),

			0x20 => array(0x00, 0x00, 0x80, 0x00),

			0x21 => array(0xff, 0x00, 0xff, 0x00),

			0x22 => array(0xff, 0xff, 0x00, 0x00),

			0x23 => array(0x00, 0xff, 0xff, 0x00),

			0x24 => array(0x80, 0x00, 0x80, 0x00),

			0x25 => array(0x80, 0x00, 0x00, 0x00),

			0x26 => array(0x00, 0x80, 0x80, 0x00),

			0x27 => array(0x00, 0x00, 0xff, 0x00),

			0x28 => array(0x00, 0xcc, 0xff, 0x00),

			0x29 => array(0xcc, 0xff, 0xff, 0x00),

			0x2A => array(0xcc, 0xff, 0xcc, 0x00),

			0x2B => array(0xff, 0xff, 0x99, 0x00),

			0x2C => array(0x99, 0xcc, 0xff, 0x00),

			0x2D => array(0xff, 0x99, 0xcc, 0x00),

			0x2E => array(0xcc, 0x99, 0xff, 0x00),

			0x2F => array(0xff, 0xcc, 0x99, 0x00),

			0x30 => array(0x33, 0x66, 0xff, 0x00),

			0x31 => array(0x33, 0xcc, 0xcc, 0x00),

			0x32 => array(0x99, 0xcc, 0x00, 0x00),

			0x33 => array(0xff, 0xcc, 0x00, 0x00),

			0x34 => array(0xff, 0x99, 0x00, 0x00),

			0x35 => array(0xff, 0x66, 0x00, 0x00),

			0x36 => array(0x66, 0x66, 0x99, 0x00),

			0x37 => array(0x96, 0x96, 0x96, 0x00),

			0x38 => array(0x00, 0x33, 0x66, 0x00),

			0x39 => array(0x33, 0x99, 0x66, 0x00),

			0x3A => array(0x00, 0x33, 0x00, 0x00),

			0x3B => array(0x33, 0x33, 0x00, 0x00),

			0x3C => array(0x99, 0x33, 0x00, 0x00),

			0x3D => array(0x99, 0x33, 0x66, 0x00),

			0x3E => array(0x33, 0x33, 0x99, 0x00),

			0x3F => array(0x33, 0x33, 0x33, 0x00),

		);

	}



	/**

	 * Assemble worksheets into a workbook and send the BIFF data to an OLE

	 * storage.

	 *

	 * @param	array	$pWorksheetSizes	The sizes in bytes of the binary worksheet streams

	 * @return	string	Binary data for workbook stream

	 */

	public function writeWorkbook($pWorksheetSizes = null)

	{

		$this->_worksheetSizes = $pWorksheetSizes;



		// Calculate the number of selected worksheet tabs and call the finalization

		// methods for each worksheet

		$total_worksheets = $this->_phpExcel->getSheetCount();



		// Add part 1 of the Workbook globals, what goes before the SHEET records

		$this->_storeBof(0x0005);

		$this->_writeCodepage();

		$this->_writeWindow1();



		$this->_writeDatemode();

		$this->_writeAllFonts();

		$this->_writeAllNumFormats();

		$this->_writeAllXfs();

		$this->_writeAllStyles();

		$this->_writePalette();



		// Prepare part 3 of the workbook global stream, what goes after the SHEET records

		$part3 = '';

		if ($this->_country_code != -1) {

			$part3 .= $this->_writeCountry();

		}

		$part3 .= $this->_writeRecalcId();



		$part3 .= $this->_writeSupbookInternal();

		/* TODO: store external SUPBOOK records and XCT and CRN records

		in case of external references for BIFF8 */

		$part3 .= $this->_writeExternsheetBiff8();

		$part3 .= $this->_writeAllDefinedNamesBiff8();

		$part3 .= $this->_writeMsoDrawingGroup();

		$part3 .= $this->_writeSharedStringsTable();



		$part3 .= $this->writeEof();



		// Add part 2 of the Workbook globals, the SHEET records

		$this->_calcSheetOffsets();

		for ($i = 0; $i < $total_worksheets; ++$i) {

			$this->_writeBoundsheet($this->_phpExcel->getSheet($i), $this->_worksheetOffsets[$i]);

		}



		// Add part 3 of the Workbook globals

		$this->_data .= $part3;



		return $this->_data;

	}



	/**

	 * Calculate offsets for Worksheet BOF records.

	 *

	 * @access private

	 */

	function _calcSheetOffsets()

	{

		$boundsheet_length = 10;  // fixed length for a BOUNDSHEET record



		// size of Workbook globals part 1 + 3

		$offset            = $this->_datasize;



		// add size of Workbook globals part 2, the length of the SHEET records

		$total_worksheets = count($this->_phpExcel->getAllSheets());

		foreach ($this->_phpExcel->getWorksheetIterator() as $sheet) {

			$offset += $boundsheet_length + strlen(PHPExcel_Shared_String::UTF8toBIFF8UnicodeShort($sheet->getTitle()));

		}



		// add the sizes of each of the Sheet substreams, respectively

		for ($i = 0; $i < $total_worksheets; ++$i) {

			$this->_worksheetOffsets[$i] = $offset;

			$offset += $this->_worksheetSizes[$i];

		}

		$this->_biffsize = $offset;

	}



	/**

	 * Store the Excel FONT records.

	 */

	private function _writeAllFonts()

	{

		foreach ($this->_fontWriters as $fontWriter) {

			$this->_append($fontWriter->writeFont());

		}

	}



	/**

	 * Store user defined numerical formats i.e. FORMAT records

	 */

	private function _writeAllNumFormats()

	{

		foreach ($this->_numberFormats as $numberFormatIndex => $numberFormat) {

			$this->_writeNumFormat($numberFormat->getFormatCode(), $numberFormatIndex);

		}

	}



	/**

	 * Write all XF records.

	 */

	private function _writeAllXfs()

	{

		foreach ($this->_xfWriters as $xfWriter) {

			$this->_append($xfWriter->writeXf());

		}

	}



	/**

	 * Write all STYLE records.

	 */

	private function _writeAllStyles()

	{

		$this->_writeStyle();

	}



	/**

	 * Write the EXTERNCOUNT and EXTERNSHEET records. These are used as indexes for

	 * the NAME records.

	 */

	private function _writeExterns()

	{

		$countSheets = $this->_phpExcel->getSheetCount();

		// Create EXTERNCOUNT with number of worksheets

		$this->_writeExterncount($countSheets);



		// Create EXTERNSHEET for each worksheet

		for ($i = 0; $i < $countSheets; ++$i) {

			$this->_writeExternsheet($this->_phpExcel->getSheet($i)->getTitle());

		}

	}



	/**

	 * Write the NAME record to define the print area and the repeat rows and cols.

	 */

	private function _writeNames()

	{

		// total number of sheets

		$total_worksheets = $this->_phpExcel->getSheetCount();



		// Create the print area NAME records

		for ($i = 0; $i < $total_worksheets; ++$i) {

			$sheetSetup = $this->_phpExcel->getSheet($i)->getPageSetup();

			// Write a Name record if the print area has been defined

			if ($sheetSetup->isPrintAreaSet()) {

				// Print area

				$printArea = PHPExcel_Cell::splitRange($sheetSetup->getPrintArea());

				$printArea = $printArea[0];

				$printArea[0] = PHPExcel_Cell::coordinateFromString($printArea[0]);

				$printArea[1] = PHPExcel_Cell::coordinateFromString($printArea[1]);



				$print_rowmin = $printArea[0][1] - 1;

				$print_rowmax = $printArea[1][1] - 1;

				$print_colmin = PHPExcel_Cell::columnIndexFromString($printArea[0][0]) - 1;

				$print_colmax = PHPExcel_Cell::columnIndexFromString($printArea[1][0]) - 1;



				$this->_writeNameShort(

					$i, // sheet index

					0x06, // NAME type

					$print_rowmin,

					$print_rowmax,

					$print_colmin,

					$print_colmax

					);

			}

		}



		// Create the print title NAME records

		for ($i = 0; $i < $total_worksheets; ++$i) {

			$sheetSetup = $this->_phpExcel->getSheet($i)->getPageSetup();



			// simultaneous repeatColumns repeatRows

			if ($sheetSetup->isColumnsToRepeatAtLeftSet() && $sheetSetup->isRowsToRepeatAtTopSet()) {

				$repeat = $sheetSetup->getColumnsToRepeatAtLeft();

				$colmin = PHPExcel_Cell::columnIndexFromString($repeat[0]) - 1;

				$colmax = PHPExcel_Cell::columnIndexFromString($repeat[1]) - 1;



				$repeat = $sheetSetup->getRowsToRepeatAtTop();

				$rowmin = $repeat[0] - 1;

				$rowmax = $repeat[1] - 1;



				$this->_writeNameLong(

					$i, // sheet index

					0x07, // NAME type

					$rowmin,

					$rowmax,

					$colmin,

					$colmax

					);



			// (exclusive) either repeatColumns or repeatRows

			} else if ($sheetSetup->isColumnsToRepeatAtLeftSet() || $sheetSetup->isRowsToRepeatAtTopSet()) {



				// Columns to repeat

				if ($sheetSetup->isColumnsToRepeatAtLeftSet()) {

					$repeat = $sheetSetup->getColumnsToRepeatAtLeft();

					$colmin = PHPExcel_Cell::columnIndexFromString($repeat[0]) - 1;

					$colmax = PHPExcel_Cell::columnIndexFromString($repeat[1]) - 1;

				} else {

					$colmin = 0;

					$colmax = 255;

				}



				// Rows to repeat

				if ($sheetSetup->isRowsToRepeatAtTopSet()) {

					$repeat = $sheetSetup->getRowsToRepeatAtTop();

					$rowmin = $repeat[0] - 1;

					$rowmax = $repeat[1] - 1;

				} else {

					$rowmin = 0;

					$rowmax = 65535;

				}



				$this->_writeNameShort(

					$i, // sheet index

					0x07, // NAME type

					$rowmin,

					$rowmax,

					$colmin,

					$colmax

					);

			}

		}

	}



	/**

	 * Writes all the DEFINEDNAME records (BIFF8).

	 * So far this is only used for repeating rows/columns (print titles) and print areas

	 */

	private function _writeAllDefinedNamesBiff8()

	{

		$chunk = '';



		// Named ranges

		if (count($this->_phpExcel->getNamedRanges()) > 0) {

			// Loop named ranges

			$namedRanges = $this->_phpExcel->getNamedRanges();

			foreach ($namedRanges as $namedRange) {



				// Create absolute coordinate

				$range = PHPExcel_Cell::splitRange($namedRange->getRange());

				for ($i = 0; $i < count($range); $i++) {

					$range[$i][0] = '\'' . str_replace("'", "''", $namedRange->getWorksheet()->getTitle()) . '\'!' . PHPExcel_Cell::absoluteCoordinate($range[$i][0]);

					if (isset($range[$i][1])) {

						$range[$i][1] = PHPExcel_Cell::absoluteCoordinate($range[$i][1]);

					}

				}

				$range = PHPExcel_Cell::buildRange($range); // e.g. Sheet1!$A$1:$B$2



				// parse formula

				try {

					$error = $this->_parser->parse($range);

					$formulaData = $this->_parser->toReversePolish();



					// make sure tRef3d is of type tRef3dR (0x3A)

					if (isset($formulaData{0}) and ($formulaData{0} == "\x7A" or $formulaData{0} == "\x5A")) {

						$formulaData = "\x3A" . substr($formulaData, 1);

					}



					if ($namedRange->getLocalOnly()) {

						// local scope

						$scope = $this->_phpExcel->getIndex($namedRange->getScope()) + 1;

					} else {

						// global scope

						$scope = 0;

					}

					$chunk .= $this->writeData($this->_writeDefinedNameBiff8($namedRange->getName(), $formulaData, $scope, false));



				} catch(PHPExcel_Exception $e) {

					// do nothing

				}

			}

		}



		// total number of sheets

		$total_worksheets = $this->_phpExcel->getSheetCount();



		// write the print titles (repeating rows, columns), if any

		for ($i = 0; $i < $total_worksheets; ++$i) {

			$sheetSetup = $this->_phpExcel->getSheet($i)->getPageSetup();

			// simultaneous repeatColumns repeatRows

			if ($sheetSetup->isColumnsToRepeatAtLeftSet() && $sheetSetup->isRowsToRepeatAtTopSet()) {

				$repeat = $sheetSetup->getColumnsToRepeatAtLeft();

				$colmin = PHPExcel_Cell::columnIndexFromString($repeat[0]) - 1;

				$colmax = PHPExcel_Cell::columnIndexFromString($repeat[1]) - 1;



				$repeat = $sheetSetup->getRowsToRepeatAtTop();

				$rowmin = $repeat[0] - 1;

				$rowmax = $repeat[1] - 1;



				// construct formula data manually

				$formulaData = pack('Cv', 0x29, 0x17); // tMemFunc

				$formulaData .= pack('Cvvvvv', 0x3B, $i, 0, 65535, $colmin, $colmax); // tArea3d

				$formulaData .= pack('Cvvvvv', 0x3B, $i, $rowmin, $rowmax, 0, 255); // tArea3d

				$formulaData .= pack('C', 0x10); // tList



				// store the DEFINEDNAME record

				$chunk .= $this->writeData($this->_writeDefinedNameBiff8(pack('C', 0x07), $formulaData, $i + 1, true));



			// (exclusive) either repeatColumns or repeatRows

			} else if ($sheetSetup->isColumnsToRepeatAtLeftSet() || $sheetSetup->isRowsToRepeatAtTopSet()) {



				// Columns to repeat

				if ($sheetSetup->isColumnsToRepeatAtLeftSet()) {

					$repeat = $sheetSetup->getColumnsToRepeatAtLeft();

					$colmin = PHPExcel_Cell::columnIndexFromString($repeat[0]) - 1;

					$colmax = PHPExcel_Cell::columnIndexFromString($repeat[1]) - 1;

				} else {

					$colmin = 0;

					$colmax = 255;

				}

				// Rows to repeat

				if ($sheetSetup->isRowsToRepeatAtTopSet()) {

					$repeat = $sheetSetup->getRowsToRepeatAtTop();

					$rowmin = $repeat[0] - 1;

					$rowmax = $repeat[1] - 1;

				} else {

					$rowmin = 0;

					$rowmax = 65535;

				}



				// construct formula data manually because parser does not recognize absolute 3d cell references

				$formulaData = pack('Cvvvvv', 0x3B, $i, $rowmin, $rowmax, $colmin, $colmax);



				// store the DEFINEDNAME record

				$chunk .= $this->writeData($this->_writeDefinedNameBiff8(pack('C', 0x07), $formulaData, $i + 1, true));

			}

		}



		// write the print areas, if any

		for ($i = 0; $i < $total_worksheets; ++$i) {

			$sheetSetup = $this->_phpExcel->getSheet($i)->getPageSetup();

			if ($sheetSetup->isPrintAreaSet()) {

				// Print area, e.g. A3:J6,H1:X20

				$printArea = PHPExcel_Cell::splitRange($sheetSetup->getPrintArea());

				$countPrintArea = count($printArea);



				$formulaData = '';

				for ($j = 0; $j < $countPrintArea; ++$j) {

					$printAreaRect = $printArea[$j]; // e.g. A3:J6

					$printAreaRect[0] = PHPExcel_Cell::coordinateFromString($printAreaRect[0]);

					$printAreaRect[1] = PHPExcel_Cell::coordinateFromString($printAreaRect[1]);



					$print_rowmin = $printAreaRect[0][1] - 1;

					$print_rowmax = $printAreaRect[1][1] - 1;

					$print_colmin = PHPExcel_Cell::columnIndexFromString($printAreaRect[0][0]) - 1;

					$print_colmax = PHPExcel_Cell::columnIndexFromString($printAreaRect[1][0]) - 1;



					// construct formula data manually because parser does not recognize absolute 3d cell references

					$formulaData .= pack('Cvvvvv', 0x3B, $i, $print_rowmin, $print_rowmax, $print_colmin, $print_colmax);



					if ($j > 0) {

						$formulaData .= pack('C', 0x10); // list operator token ','

					}

				}



				// store the DEFINEDNAME record

				$chunk .= $this->writeData($this->_writeDefinedNameBiff8(pack('C', 0x06), $formulaData, $i + 1, true));

			}

		}



		// write autofilters, if any

		for ($i = 0; $i < $total_worksheets; ++$i) {

			$sheetAutoFilter = $this->_phpExcel->getSheet($i)->getAutoFilter();

			$autoFilterRange = $sheetAutoFilter->getRange();

			if(!empty($autoFilterRange)) {

				$rangeBounds = PHPExcel_Cell::rangeBoundaries($autoFilterRange);



				//Autofilter built in name

				$name = pack('C', 0x0D);



				$chunk .= $this->writeData($this->_writeShortNameBiff8($name, $i + 1, $rangeBounds, true));

			}

		}



		return $chunk;

	}



	/**

	 * Write a DEFINEDNAME record for BIFF8 using explicit binary formula data

	 *

	 * @param	string		$name			The name in UTF-8

	 * @param	string		$formulaData	The binary formula data

	 * @param	string		$sheetIndex		1-based sheet index the defined name applies to. 0 = global

	 * @param	boolean		$isBuiltIn		Built-in name?

	 * @return	string	Complete binary record data

	 */

	private function _writeDefinedNameBiff8($name, $formulaData, $sheetIndex = 0, $isBuiltIn = false)

	{

		$record = 0x0018;



		// option flags

		$options = $isBuiltIn ? 0x20 : 0x00;



		// length of the name, character count

		$nlen = PHPExcel_Shared_String::CountCharacters($name);



		// name with stripped length field

		$name = substr(PHPExcel_Shared_String::UTF8toBIFF8UnicodeLong($name), 2);



		// size of the formula (in bytes)

		$sz = strlen($formulaData);



		// combine the parts

		$data = pack('vCCvvvCCCC', $options, 0, $nlen, $sz, 0, $sheetIndex, 0, 0, 0, 0)

			. $name . $formulaData;

		$length = strlen($data);



		$header = pack('vv', $record, $length);



		return $header . $data;

	}



	/**

	 * Write a short NAME record

	 *

	 * @param	string		 $name

	 * @param	string		 $sheetIndex		1-based sheet index the defined name applies to. 0 = global

	 * @param	integer[][]  $rangeBounds    range boundaries

	 * @param	boolean      $isHidden

	 * @return	string	Complete binary record data

	 * */

	private function _writeShortNameBiff8($name, $sheetIndex = 0, $rangeBounds, $isHidden = false){

		$record = 0x0018;



		// option flags

		$options = ($isHidden  ? 0x21 : 0x00);



		$extra  = pack('Cvvvvv',

				0x3B,

				$sheetIndex - 1,

				$rangeBounds[0][1] - 1,

				$rangeBounds[1][1] - 1,

				$rangeBounds[0][0] - 1,

				$rangeBounds[1][0] - 1);



		// size of the formula (in bytes)

		$sz = strlen($extra);



		// combine the parts

		$data = pack('vCCvvvCCCCC', $options, 0, 1, $sz, 0, $sheetIndex, 0, 0, 0, 0, 0)

			. $name . $extra;

		$length = strlen($data);



		$header = pack('vv', $record, $length);



		return $header . $data;

	}



	/**

	 * Stores the CODEPAGE biff record.

	 */

	private function _writeCodepage()

	{

		$record          = 0x0042;             // Record identifier

		$length          = 0x0002;             // Number of bytes to follow

		$cv              = $this->_codepage;   // The code page



		$header          = pack('vv', $record, $length);

		$data            = pack('v',  $cv);



		$this->_append($header . $data);

	}



	/**

	 * Write Excel BIFF WINDOW1 record.

	 */

	private function _writeWindow1()

	{

		$record    = 0x003D;                 // Record identifier

		$length    = 0x0012;                 // Number of bytes to follow



		$xWn       = 0x0000;                 // Horizontal position of window

		$yWn       = 0x0000;                 // Vertical position of window

		$dxWn      = 0x25BC;                 // Width of window

		$dyWn      = 0x1572;                 // Height of window



		$grbit     = 0x0038;                 // Option flags



		// not supported by PHPExcel, so there is only one selected sheet, the active

		$ctabsel   = 1;       // Number of workbook tabs selected



		$wTabRatio = 0x0258;                 // Tab to scrollbar ratio



		// not supported by PHPExcel, set to 0

		$itabFirst = 0;     // 1st displayed worksheet

		$itabCur   = $this->_phpExcel->getActiveSheetIndex();    // Active worksheet



		$header    = pack("vv",        $record, $length);

		$data      = pack("vvvvvvvvv", $xWn, $yWn, $dxWn, $dyWn,

									   $grbit,

									   $itabCur, $itabFirst,

									   $ctabsel, $wTabRatio);

		$this->_append($header . $data);

	}



	/**

	 * Writes Excel BIFF BOUNDSHEET record.

	 *

	 * @param PHPExcel_Worksheet  $sheet Worksheet name

	 * @param integer $offset    Location of worksheet BOF

	 */

	private function _writeBoundsheet($sheet, $offset)

	{

		$sheetname = $sheet->getTitle();

		$record    = 0x0085;                    // Record identifier



		// sheet state

		switch ($sheet->getSheetState()) {

			case PHPExcel_Worksheet::SHEETSTATE_VISIBLE:	$ss = 0x00; break;

			case PHPExcel_Worksheet::SHEETSTATE_HIDDEN:		$ss = 0x01; break;

			case PHPExcel_Worksheet::SHEETSTATE_VERYHIDDEN:	$ss = 0x02; break;

			default: $ss = 0x00; break;

		}



		// sheet type

		$st = 0x00;



		$grbit     = 0x0000;                    // Visibility and sheet type



		$data      = pack("VCC", $offset, $ss, $st);

		$data .= PHPExcel_Shared_String::UTF8toBIFF8UnicodeShort($sheetname);



		$length = strlen($data);

		$header = pack("vv",  $record, $length);

		$this->_append($header . $data);

	}



	/**

	 * Write Internal SUPBOOK record

	 */

	private function _writeSupbookInternal()

	{

		$record    = 0x01AE;   // Record identifier

		$length    = 0x0004;   // Bytes to follow



		$header    = pack("vv", $record, $length);

		$data      = pack("vv", $this->_phpExcel->getSheetCount(), 0x0401);

		return $this->writeData($header . $data);

	}



	/**

	 * Writes the Excel BIFF EXTERNSHEET record. These references are used by

	 * formulas.

	 *

	 */

	private function _writeExternsheetBiff8()

	{

		$total_references = count($this->_parser->_references);

		$record   = 0x0017;                     // Record identifier

		$length   = 2 + 6 * $total_references;  // Number of bytes to follow



		$supbook_index = 0;           // FIXME: only using internal SUPBOOK record

		$header           = pack("vv",  $record, $length);

		$data             = pack('v', $total_references);

		for ($i = 0; $i < $total_references; ++$i) {

			$data .= $this->_parser->_references[$i];

		}

		return $this->writeData($header . $data);

	}



	/**

	 * Write Excel BIFF STYLE records.

	 */

	private function _writeStyle()

	{

		$record    = 0x0293;   // Record identifier

		$length    = 0x0004;   // Bytes to follow



		$ixfe      = 0x8000;  // Index to cell style XF

		$BuiltIn   = 0x00;     // Built-in style

		$iLevel    = 0xff;     // Outline style level



		$header    = pack("vv",  $record, $length);

		$data      = pack("vCC", $ixfe, $BuiltIn, $iLevel);

		$this->_append($header . $data);

	}



	/**

	 * Writes Excel FORMAT record for non "built-in" numerical formats.

	 *

	 * @param string  $format Custom format string

	 * @param integer $ifmt   Format index code

	 */

	private function _writeNumFormat($format, $ifmt)

	{

		$record    = 0x041E;                      // Record identifier



		$numberFormatString = PHPExcel_Shared_String::UTF8toBIFF8UnicodeLong($format);

		$length    = 2 + strlen($numberFormatString);      // Number of bytes to follow





		$header    = pack("vv", $record, $length);

		$data      = pack("v", $ifmt) .  $numberFormatString;

		$this->_append($header . $data);

	}



	/**

	 * Write DATEMODE record to indicate the date system in use (1904 or 1900).

	 */

	private function _writeDatemode()

	{

		$record    = 0x0022;         // Record identifier

		$length    = 0x0002;         // Bytes to follow



		$f1904     = (PHPExcel_Shared_Date::getExcelCalendar() == PHPExcel_Shared_Date::CALENDAR_MAC_1904) ?

			1 : 0;   // Flag for 1904 date system



		$header    = pack("vv", $record, $length);

		$data      = pack("v", $f1904);

		$this->_append($header . $data);

	}



	/**

	 * Write BIFF record EXTERNCOUNT to indicate the number of external sheet

	 * references in the workbook.

	 *

	 * Excel only stores references to external sheets that are used in NAME.

	 * The workbook NAME record is required to define the print area and the repeat

	 * rows and columns.

	 *

	 * A similar method is used in Worksheet.php for a slightly different purpose.

	 *

	 * @param integer $cxals Number of external references

	 */

	private function _writeExterncount($cxals)

	{

		$record   = 0x0016;          // Record identifier

		$length   = 0x0002;          // Number of bytes to follow



		$header   = pack("vv", $record, $length);

		$data     = pack("v",  $cxals);

		$this->_append($header . $data);

	}



	/**

	 * Writes the Excel BIFF EXTERNSHEET record. These references are used by

	 * formulas. NAME record is required to define the print area and the repeat

	 * rows and columns.

	 *

	 * A similar method is used in Worksheet.php for a slightly different purpose.

	 *

	 * @param string $sheetname Worksheet name

	 */

	private function _writeExternsheet($sheetname)

	{

		$record      = 0x0017;                     // Record identifier

		$length      = 0x02 + strlen($sheetname);  // Number of bytes to follow



		$cch         = strlen($sheetname);         // Length of sheet name

		$rgch        = 0x03;                       // Filename encoding



		$header      = pack("vv",  $record, $length);

		$data        = pack("CC", $cch, $rgch);

		$this->_append($header . $data . $sheetname);

	}



	/**

	 * Store the NAME record in the short format that is used for storing the print

	 * area, repeat rows only and repeat columns only.

	 *

	 * @param integer $index  Sheet index

	 * @param integer $type   Built-in name type

	 * @param integer $rowmin Start row

	 * @param integer $rowmax End row

	 * @param integer $colmin Start colum

	 * @param integer $colmax End column

	 */

	private function _writeNameShort($index, $type, $rowmin, $rowmax, $colmin, $colmax)

	{

		$record          = 0x0018;       // Record identifier

		$length          = 0x0024;       // Number of bytes to follow



		$grbit           = 0x0020;       // Option flags

		$chKey           = 0x00;         // Keyboard shortcut

		$cch             = 0x01;         // Length of text name

		$cce             = 0x0015;       // Length of text definition

		$ixals           = $index + 1;   // Sheet index

		$itab            = $ixals;       // Equal to ixals

		$cchCustMenu     = 0x00;         // Length of cust menu text

		$cchDescription  = 0x00;         // Length of description text

		$cchHelptopic    = 0x00;         // Length of help topic text

		$cchStatustext   = 0x00;         // Length of status bar text

		$rgch            = $type;        // Built-in name type



		$unknown03       = 0x3b;

		$unknown04       = 0xffff-$index;

		$unknown05       = 0x0000;

		$unknown06       = 0x0000;

		$unknown07       = 0x1087;

		$unknown08       = 0x8005;



		$header             = pack("vv", $record, $length);

		$data               = pack("v", $grbit);

		$data              .= pack("C", $chKey);

		$data              .= pack("C", $cch);

		$data              .= pack("v", $cce);

		$data              .= pack("v", $ixals);

		$data              .= pack("v", $itab);

		$data              .= pack("C", $cchCustMenu);

		$data              .= pack("C", $cchDescription);

		$data              .= pack("C", $cchHelptopic);

		$data              .= pack("C", $cchStatustext);

		$data              .= pack("C", $rgch);

		$data              .= pack("C", $unknown03);

		$data              .= pack("v", $unknown04);

		$data              .= pack("v", $unknown05);

		$data              .= pack("v", $unknown06);

		$data              .= pack("v", $unknown07);

		$data              .= pack("v", $unknown08);

		$data              .= pack("v", $index);

		$data              .= pack("v", $index);

		$data              .= pack("v", $rowmin);

		$data              .= pack("v", $rowmax);

		$data              .= pack("C", $colmin);

		$data              .= pack("C", $colmax);

		$this->_append($header . $data);

	}



	/**

	 * Store the NAME record in the long format that is used for storing the repeat

	 * rows and columns when both are specified. This shares a lot of code with

	 * _writeNameShort() but we use a separate method to keep the code clean.

	 * Code abstraction for reuse can be carried too far, and I should know. ;-)

	 *

	 * @param integer $index Sheet index

	 * @param integer $type  Built-in name type

	 * @param integer $rowmin Start row

	 * @param integer $rowmax End row

	 * @param integer $colmin Start colum

	 * @param integer $colmax End column

	 */

	private function _writeNameLong($index, $type, $rowmin, $rowmax, $colmin, $colmax)

	{

		$record          = 0x0018;       // Record identifier

		$length          = 0x003d;       // Number of bytes to follow

		$grbit           = 0x0020;       // Option flags

		$chKey           = 0x00;         // Keyboard shortcut

		$cch             = 0x01;         // Length of text name

		$cce             = 0x002e;       // Length of text definition

		$ixals           = $index + 1;   // Sheet index

		$itab            = $ixals;       // Equal to ixals

		$cchCustMenu     = 0x00;         // Length of cust menu text

		$cchDescription  = 0x00;         // Length of description text

		$cchHelptopic    = 0x00;         // Length of help topic text

		$cchStatustext   = 0x00;         // Length of status bar text

		$rgch            = $type;        // Built-in name type



		$unknown01       = 0x29;

		$unknown02       = 0x002b;

		$unknown03       = 0x3b;

		$unknown04       = 0xffff-$index;

		$unknown05       = 0x0000;

		$unknown06       = 0x0000;

		$unknown07       = 0x1087;

		$unknown08       = 0x8008;



		$header             = pack("vv",  $record, $length);

		$data               = pack("v", $grbit);

		$data              .= pack("C", $chKey);

		$data              .= pack("C", $cch);

		$data              .= pack("v", $cce);

		$data              .= pack("v", $ixals);

		$data              .= pack("v", $itab);

		$data              .= pack("C", $cchCustMenu);

		$data              .= pack("C", $cchDescription);

		$data              .= pack("C", $cchHelptopic);

		$data              .= pack("C", $cchStatustext);

		$data              .= pack("C", $rgch);

		$data              .= pack("C", $unknown01);

		$data              .= pack("v", $unknown02);

		// Column definition

		$data              .= pack("C", $unknown03);

		$data              .= pack("v", $unknown04);

		$data              .= pack("v", $unknown05);

		$data              .= pack("v", $unknown06);

		$data              .= pack("v", $unknown07);

		$data              .= pack("v", $unknown08);

		$data              .= pack("v", $index);

		$data              .= pack("v", $index);

		$data              .= pack("v", 0x0000);

		$data              .= pack("v", 0x3fff);

		$data              .= pack("C", $colmin);

		$data              .= pack("C", $colmax);

		// Row definition

		$data              .= pack("C", $unknown03);

		$data              .= pack("v", $unknown04);

		$data              .= pack("v", $unknown05);

		$data              .= pack("v", $unknown06);

		$data              .= pack("v", $unknown07);

		$data              .= pack("v", $unknown08);

		$data              .= pack("v", $index);

		$data              .= pack("v", $index);

		$data              .= pack("v", $rowmin);

		$data              .= pack("v", $rowmax);

		$data              .= pack("C", 0x00);

		$data              .= pack("C", 0xff);

		// End of data

		$data              .= pack("C", 0x10);

		$this->_append($header . $data);

	}



	/**

	 * Stores the COUNTRY record for localization

	 *

	 * @return string

	 */

	private function _writeCountry()

	{

		$record          = 0x008C;    // Record identifier

		$length          = 4;         // Number of bytes to follow



		$header = pack('vv',  $record, $length);

		/* using the same country code always for simplicity */

		$data = pack('vv', $this->_country_code, $this->_country_code);

		//$this->_append($header . $data);

		return $this->writeData($header . $data);

	}



	/**

	 * Write the RECALCID record

	 *

	 * @return string

	 */

	private function _writeRecalcId()

	{

		$record = 0x01C1;    // Record identifier

		$length = 8;         // Number of bytes to follow



		$header = pack('vv',  $record, $length);



		// by inspection of real Excel files, MS Office Excel 2007 writes this

		$data = pack('VV', 0x000001C1, 0x00001E667);



		return $this->writeData($header . $data);

	}



	/**

	 * Stores the PALETTE biff record.

	 */

	private function _writePalette()

	{

		$aref            = $this->_palette;



		$record          = 0x0092;                 // Record identifier

		$length          = 2 + 4 * count($aref);   // Number of bytes to follow

		$ccv             =         count($aref);   // Number of RGB values to follow

		$data = '';                                // The RGB data



		// Pack the RGB data

		foreach ($aref as $color) {

			foreach ($color as $byte) {

				$data .= pack("C",$byte);

			}

		}



		$header = pack("vvv",  $record, $length, $ccv);

		$this->_append($header . $data);

	}



	/**

	 * Handling of the SST continue blocks is complicated by the need to include an

	 * additional continuation byte depending on whether the string is split between

	 * blocks or whether it starts at the beginning of the block. (There are also

	 * additional complications that will arise later when/if Rich Strings are

	 * supported).

	 *

	 * The Excel documentation says that the SST record should be followed by an

	 * EXTSST record. The EXTSST record is a hash table that is used to optimise

	 * access to SST. However, despite the documentation it doesn't seem to be

	 * required so we will ignore it.

	 *

	 * @return string Binary data

	 */

	private function _writeSharedStringsTable()

	{

		// maximum size of record data (excluding record header)

		$continue_limit = 8224;



		// initialize array of record data blocks

		$recordDatas = array();



		// start SST record data block with total number of strings, total number of unique strings

		$recordData = pack("VV", $this->_str_total, $this->_str_unique);



		// loop through all (unique) strings in shared strings table

		foreach (array_keys($this->_str_table) as $string) {



			// here $string is a BIFF8 encoded string



			// length = character count

			$headerinfo = unpack("vlength/Cencoding", $string);



			// currently, this is always 1 = uncompressed

			$encoding = $headerinfo["encoding"];



			// initialize finished writing current $string

			$finished = false;



			while ($finished === false) {



				// normally, there will be only one cycle, but if string cannot immediately be written as is

				// there will be need for more than one cylcle, if string longer than one record data block, there

				// may be need for even more cycles



				if (strlen($recordData) + strlen($string) <= $continue_limit) {

					// then we can write the string (or remainder of string) without any problems

					$recordData .= $string;



					if (strlen($recordData) + strlen($string) == $continue_limit) {

						// we close the record data block, and initialize a new one

						$recordDatas[] = $recordData;

						$recordData = '';

					}



					// we are finished writing this string

					$finished = true;

				} else {

					// special treatment writing the string (or remainder of the string)

					// If the string is very long it may need to be written in more than one CONTINUE record.



					// check how many bytes more there is room for in the current record

					$space_remaining = $continue_limit - strlen($recordData);



					// minimum space needed

					// uncompressed: 2 byte string length length field + 1 byte option flags + 2 byte character

					// compressed:   2 byte string length length field + 1 byte option flags + 1 byte character

					$min_space_needed = ($encoding == 1) ? 5 : 4;



					// We have two cases

					// 1. space remaining is less than minimum space needed

					//		here we must waste the space remaining and move to next record data block

					// 2. space remaining is greater than or equal to minimum space needed

					//		here we write as much as we can in the current block, then move to next record data block



					// 1. space remaining is less than minimum space needed

					if ($space_remaining < $min_space_needed) {

						// we close the block, store the block data

						$recordDatas[] = $recordData;



						// and start new record data block where we start writing the string

						$recordData = '';



					// 2. space remaining is greater than or equal to minimum space needed

					} else {

						// initialize effective remaining space, for Unicode strings this may need to be reduced by 1, see below

						$effective_space_remaining = $space_remaining;



						// for uncompressed strings, sometimes effective space remaining is reduced by 1

						if ( $encoding == 1 && (strlen($string) - $space_remaining) % 2 == 1 ) {

							--$effective_space_remaining;

						}



						// one block fininshed, store the block data

						$recordData .= substr($string, 0, $effective_space_remaining);



						$string = substr($string, $effective_space_remaining); // for next cycle in while loop

						$recordDatas[] = $recordData;



						// start new record data block with the repeated option flags

						$recordData = pack('C', $encoding);

					}

				}

			}

		}



		// Store the last record data block unless it is empty

		// if there was no need for any continue records, this will be the for SST record data block itself

		if (strlen($recordData) > 0) {

			$recordDatas[] = $recordData;

		}



		// combine into one chunk with all the blocks SST, CONTINUE,...

		$chunk = '';

		foreach ($recordDatas as $i => $recordData) {

			// first block should have the SST record header, remaing should have CONTINUE header

			$record = ($i == 0) ? 0x00FC : 0x003C;



			$header = pack("vv", $record, strlen($recordData));

			$data = $header . $recordData;



			$chunk .= $this->writeData($data);

		}



		return $chunk;

	}



	/**

	 * Writes the MSODRAWINGGROUP record if needed. Possibly split using CONTINUE records.

	 */

	private function _writeMsoDrawingGroup()

	{

		// write the Escher stream if necessary

		if (isset($this->_escher)) {

			$writer = new PHPExcel_Writer_Excel5_Escher($this->_escher);

			$data = $writer->close();



			$record = 0x00EB;

			$length = strlen($data);

			$header = pack("vv",  $record, $length);



			return $this->writeData($header . $data);



		} else {

			return '';

		}

	}



	/**

	 * Get Escher object

	 *

	 * @return PHPExcel_Shared_Escher

	 */

	public function getEscher()

	{

		return $this->_escher;

	}



	/**

	 * Set Escher object

	 *

	 * @param PHPExcel_Shared_Escher $pValue

	 */

	public function setEscher(PHPExcel_Shared_Escher $pValue = null)

	{

		$this->_escher = $pValue;

	}

}

