<?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_HTML

 * @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

 */





/**

 * PHPExcel_Writer_HTML

 *

 * @category   PHPExcel

 * @package	PHPExcel_Writer_HTML

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

 */

class PHPExcel_Writer_HTML extends PHPExcel_Writer_Abstract implements PHPExcel_Writer_IWriter {

	/**

	 * PHPExcel object

	 *

	 * @var PHPExcel

	 */

	protected $_phpExcel;



	/**

	 * Sheet index to write

	 *

	 * @var int

	 */

	private $_sheetIndex	= 0;



	/**

	 * Images root

	 *

	 * @var string

	 */

	private $_imagesRoot	= '.';



	/**

	 * embed images, or link to images

	 *

	 * @var boolean

	 */

	private $_embedImages	= FALSE;



	/**

	 * Use inline CSS?

	 *

	 * @var boolean

	 */

	private $_useInlineCss = false;



	/**

	 * Array of CSS styles

	 *

	 * @var array

	 */

	private $_cssStyles = null;



	/**

	 * Array of column widths in points

	 *

	 * @var array

	 */

	private $_columnWidths = null;



	/**

	 * Default font

	 *

	 * @var PHPExcel_Style_Font

	 */

	private $_defaultFont;



	/**

	 * Flag whether spans have been calculated

	 *

	 * @var boolean

	 */

	private $_spansAreCalculated	= false;



	/**

	 * Excel cells that should not be written as HTML cells

	 *

	 * @var array

	 */

	private $_isSpannedCell	= array();



	/**

	 * Excel cells that are upper-left corner in a cell merge

	 *

	 * @var array

	 */

	private $_isBaseCell	= array();



	/**

	 * Excel rows that should not be written as HTML rows

	 *

	 * @var array

	 */

	private $_isSpannedRow	= array();



	/**

	 * Is the current writer creating PDF?

	 *

	 * @var boolean

	 */

	protected $_isPdf = false;



	/**

	 * Generate the Navigation block

	 *

	 * @var boolean

	 */

	private $_generateSheetNavigationBlock = true;



	/**

	 * Create a new PHPExcel_Writer_HTML

	 *

	 * @param	PHPExcel	$phpExcel	PHPExcel object

	 */

	public function __construct(PHPExcel $phpExcel) {

		$this->_phpExcel = $phpExcel;

		$this->_defaultFont = $this->_phpExcel->getDefaultStyle()->getFont();

	}



	/**

	 * Save PHPExcel to file

	 *

	 * @param	string		$pFilename

	 * @throws	PHPExcel_Writer_Exception

	 */

	public function save($pFilename = null) {

		// garbage collect

		$this->_phpExcel->garbageCollect();



		$saveDebugLog = PHPExcel_Calculation::getInstance($this->_phpExcel)->getDebugLog()->getWriteDebugLog();

		PHPExcel_Calculation::getInstance($this->_phpExcel)->getDebugLog()->setWriteDebugLog(FALSE);

		$saveArrayReturnType = PHPExcel_Calculation::getArrayReturnType();

		PHPExcel_Calculation::setArrayReturnType(PHPExcel_Calculation::RETURN_ARRAY_AS_VALUE);



		// Build CSS

		$this->buildCSS(!$this->_useInlineCss);



		// Open file

		$fileHandle = fopen($pFilename, 'wb+');

		if ($fileHandle === false) {

			throw new PHPExcel_Writer_Exception("Could not open file $pFilename for writing.");

		}



		// Write headers

		fwrite($fileHandle, $this->generateHTMLHeader(!$this->_useInlineCss));



		// Write navigation (tabs)

		if ((!$this->_isPdf) && ($this->_generateSheetNavigationBlock)) {

			fwrite($fileHandle, $this->generateNavigation());

		}



		// Write data

		fwrite($fileHandle, $this->generateSheetData());



		// Write footer

		fwrite($fileHandle, $this->generateHTMLFooter());



		// Close file

		fclose($fileHandle);



		PHPExcel_Calculation::setArrayReturnType($saveArrayReturnType);

		PHPExcel_Calculation::getInstance($this->_phpExcel)->getDebugLog()->setWriteDebugLog($saveDebugLog);

	}



	/**

	 * Map VAlign

	 *

	 * @param	string		$vAlign		Vertical alignment

	 * @return string

	 */

	private function _mapVAlign($vAlign) {

		switch ($vAlign) {

			case PHPExcel_Style_Alignment::VERTICAL_BOTTOM:		return 'bottom';

			case PHPExcel_Style_Alignment::VERTICAL_TOP:		return 'top';

			case PHPExcel_Style_Alignment::VERTICAL_CENTER:

			case PHPExcel_Style_Alignment::VERTICAL_JUSTIFY:	return 'middle';

			default: return 'baseline';

		}

	}



	/**

	 * Map HAlign

	 *

	 * @param	string		$hAlign		Horizontal alignment

	 * @return string|false

	 */

	private function _mapHAlign($hAlign) {

		switch ($hAlign) {

			case PHPExcel_Style_Alignment::HORIZONTAL_GENERAL:				return false;

			case PHPExcel_Style_Alignment::HORIZONTAL_LEFT:					return 'left';

			case PHPExcel_Style_Alignment::HORIZONTAL_RIGHT:				return 'right';

			case PHPExcel_Style_Alignment::HORIZONTAL_CENTER:

			case PHPExcel_Style_Alignment::HORIZONTAL_CENTER_CONTINUOUS:	return 'center';

			case PHPExcel_Style_Alignment::HORIZONTAL_JUSTIFY:				return 'justify';

			default: return false;

		}

	}



	/**

	 * Map border style

	 *

	 * @param	int		$borderStyle		Sheet index

	 * @return	string

	 */

	private function _mapBorderStyle($borderStyle) {

		switch ($borderStyle) {

			case PHPExcel_Style_Border::BORDER_NONE:				return 'none';

			case PHPExcel_Style_Border::BORDER_DASHDOT:				return '1px dashed';

			case PHPExcel_Style_Border::BORDER_DASHDOTDOT:			return '1px dotted';

			case PHPExcel_Style_Border::BORDER_DASHED:				return '1px dashed';

			case PHPExcel_Style_Border::BORDER_DOTTED:				return '1px dotted';

			case PHPExcel_Style_Border::BORDER_DOUBLE:				return '3px double';

			case PHPExcel_Style_Border::BORDER_HAIR:				return '1px solid';

			case PHPExcel_Style_Border::BORDER_MEDIUM:				return '2px solid';

			case PHPExcel_Style_Border::BORDER_MEDIUMDASHDOT:		return '2px dashed';

			case PHPExcel_Style_Border::BORDER_MEDIUMDASHDOTDOT:	return '2px dotted';

			case PHPExcel_Style_Border::BORDER_MEDIUMDASHED:		return '2px dashed';

			case PHPExcel_Style_Border::BORDER_SLANTDASHDOT:		return '2px dashed';

			case PHPExcel_Style_Border::BORDER_THICK:				return '3px solid';

			case PHPExcel_Style_Border::BORDER_THIN:				return '1px solid';

			default: return '1px solid'; // map others to thin

		}

	}



	/**

	 * Get sheet index

	 *

	 * @return int

	 */

	public function getSheetIndex() {

		return $this->_sheetIndex;

	}



	/**

	 * Set sheet index

	 *

	 * @param	int		$pValue		Sheet index

	 * @return PHPExcel_Writer_HTML

	 */

	public function setSheetIndex($pValue = 0) {

		$this->_sheetIndex = $pValue;

		return $this;

	}



	/**

	 * Get sheet index

	 *

	 * @return boolean

	 */

	public function getGenerateSheetNavigationBlock() {

		return $this->_generateSheetNavigationBlock;

	}



	/**

	 * Set sheet index

	 *

	 * @param	boolean		$pValue		Flag indicating whether the sheet navigation block should be generated or not

	 * @return PHPExcel_Writer_HTML

	 */

	public function setGenerateSheetNavigationBlock($pValue = true) {

		$this->_generateSheetNavigationBlock = (bool) $pValue;

		return $this;

	}



	/**

	 * Write all sheets (resets sheetIndex to NULL)

	 */

	public function writeAllSheets() {

		$this->_sheetIndex = null;

		return $this;

	}



	/**

	 * Generate HTML header

	 *

	 * @param	boolean		$pIncludeStyles		Include styles?

	 * @return	string

	 * @throws PHPExcel_Writer_Exception

	 */

	public function generateHTMLHeader($pIncludeStyles = false) {

		// PHPExcel object known?

		if (is_null($this->_phpExcel)) {

			throw new PHPExcel_Writer_Exception('Internal PHPExcel object not set to an instance of an object.');

		}



		// Construct HTML

		$properties = $this->_phpExcel->getProperties();

		$html = '<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd">' . PHP_EOL;

		$html .= '<!-- Generated by PHPExcel - http://www.phpexcel.net -->' . PHP_EOL;

		$html .= '<html>' . PHP_EOL;

		$html .= '  <head>' . PHP_EOL;

		$html .= '	  <meta http-equiv="Content-Type" content="text/html; charset=utf-8">' . PHP_EOL;

		if ($properties->getTitle() > '')

			$html .= '	  <title>' . htmlspecialchars($properties->getTitle()) . '</title>' . PHP_EOL;



		if ($properties->getCreator() > '')

			$html .= '	  <meta name="author" content="' . htmlspecialchars($properties->getCreator()) . '" />' . PHP_EOL;

		if ($properties->getTitle() > '')

			$html .= '	  <meta name="title" content="' . htmlspecialchars($properties->getTitle()) . '" />' . PHP_EOL;

		if ($properties->getDescription() > '')

			$html .= '	  <meta name="description" content="' . htmlspecialchars($properties->getDescription()) . '" />' . PHP_EOL;

		if ($properties->getSubject() > '')

			$html .= '	  <meta name="subject" content="' . htmlspecialchars($properties->getSubject()) . '" />' . PHP_EOL;

		if ($properties->getKeywords() > '')

			$html .= '	  <meta name="keywords" content="' . htmlspecialchars($properties->getKeywords()) . '" />' . PHP_EOL;

		if ($properties->getCategory() > '')

			$html .= '	  <meta name="category" content="' . htmlspecialchars($properties->getCategory()) . '" />' . PHP_EOL;

		if ($properties->getCompany() > '')

			$html .= '	  <meta name="company" content="' . htmlspecialchars($properties->getCompany()) . '" />' . PHP_EOL;

		if ($properties->getManager() > '')

			$html .= '	  <meta name="manager" content="' . htmlspecialchars($properties->getManager()) . '" />' . PHP_EOL;



		if ($pIncludeStyles) {

			$html .= $this->generateStyles(true);

		}



		$html .= '  </head>' . PHP_EOL;

		$html .= '' . PHP_EOL;

		$html .= '  <body>' . PHP_EOL;



		// Return

		return $html;

	}



	/**

	 * Generate sheet data

	 *

	 * @return	string

	 * @throws PHPExcel_Writer_Exception

	 */

	public function generateSheetData() {

		// PHPExcel object known?

		if (is_null($this->_phpExcel)) {

			throw new PHPExcel_Writer_Exception('Internal PHPExcel object not set to an instance of an object.');

		}



		// Ensure that Spans have been calculated?

		if (!$this->_spansAreCalculated) {

			$this->_calculateSpans();

		}



		// Fetch sheets

		$sheets = array();

		if (is_null($this->_sheetIndex)) {

			$sheets = $this->_phpExcel->getAllSheets();

		} else {

			$sheets[] = $this->_phpExcel->getSheet($this->_sheetIndex);

		}



		// Construct HTML

		$html = '';



		// Loop all sheets

		$sheetId = 0;

		foreach ($sheets as $sheet) {

			// Write table header

			$html .= $this->_generateTableHeader($sheet);



			// Get worksheet dimension

			$dimension = explode(':', $sheet->calculateWorksheetDimension());

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

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

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

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



			// row min,max

			$rowMin = $dimension[0][1];

			$rowMax = $dimension[1][1];



			// calculate start of <tbody>, <thead>

			$tbodyStart = $rowMin;

			$theadStart = $theadEnd   = 0; // default: no <thead>	no </thead>

			if ($sheet->getPageSetup()->isRowsToRepeatAtTopSet()) {

				$rowsToRepeatAtTop = $sheet->getPageSetup()->getRowsToRepeatAtTop();



				// we can only support repeating rows that start at top row

				if ($rowsToRepeatAtTop[0] == 1) {

					$theadStart = $rowsToRepeatAtTop[0];

					$theadEnd   = $rowsToRepeatAtTop[1];

					$tbodyStart = $rowsToRepeatAtTop[1] + 1;

				}

			}



			// Loop through cells

			$row = $rowMin-1;

			while($row++ < $rowMax) {

				// <thead> ?

				if ($row == $theadStart) {

					$html .= '		<thead>' . PHP_EOL;

				}



				// <tbody> ?

				if ($row == $tbodyStart) {

					$html .= '		<tbody>' . PHP_EOL;

				}



				// Write row if there are HTML table cells in it

				if ( !isset($this->_isSpannedRow[$sheet->getParent()->getIndex($sheet)][$row]) ) {

					// Start a new rowData

					$rowData = array();

					// Loop through columns

					$column = $dimension[0][0] - 1;

					while($column++ < $dimension[1][0]) {

						// Cell exists?

						if ($sheet->cellExistsByColumnAndRow($column, $row)) {

							$rowData[$column] = PHPExcel_Cell::stringFromColumnIndex($column) . $row;

						} else {

							$rowData[$column] = '';

						}

					}

					$html .= $this->_generateRow($sheet, $rowData, $row - 1);

				}



				// </thead> ?

				if ($row == $theadEnd) {

					$html .= '		</thead>' . PHP_EOL;

				}

			}

			$html .= $this->_extendRowsForChartsAndImages($sheet, $row);



			// Close table body.

			$html .= '		</tbody>' . PHP_EOL;



			// Write table footer

			$html .= $this->_generateTableFooter();



			// Writing PDF?

			if ($this->_isPdf) {

				if (is_null($this->_sheetIndex) && $sheetId + 1 < $this->_phpExcel->getSheetCount()) {

					$html .= '<div style="page-break-before:always" />';

				}

			}



			// Next sheet

			++$sheetId;

		}



		// Return

		return $html;

	}



	/**

	 * Generate sheet tabs

	 *

	 * @return	string

	 * @throws PHPExcel_Writer_Exception

	 */

	public function generateNavigation()

	{

		// PHPExcel object known?

		if (is_null($this->_phpExcel)) {

			throw new PHPExcel_Writer_Exception('Internal PHPExcel object not set to an instance of an object.');

		}



		// Fetch sheets

		$sheets = array();

		if (is_null($this->_sheetIndex)) {

			$sheets = $this->_phpExcel->getAllSheets();

		} else {

			$sheets[] = $this->_phpExcel->getSheet($this->_sheetIndex);

		}



		// Construct HTML

		$html = '';



		// Only if there are more than 1 sheets

		if (count($sheets) > 1) {

			// Loop all sheets

			$sheetId = 0;



			$html .= '<ul class="navigation">' . PHP_EOL;



			foreach ($sheets as $sheet) {

				$html .= '  <li class="sheet' . $sheetId . '"><a href="#sheet' . $sheetId . '">' . $sheet->getTitle() . '</a></li>' . PHP_EOL;

				++$sheetId;

			}



			$html .= '</ul>' . PHP_EOL;

		}



		return $html;

	}



	private function _extendRowsForChartsAndImages(PHPExcel_Worksheet $pSheet, $row) {

		$rowMax = $row;

		$colMax = 'A';

		if ($this->_includeCharts) {

			foreach ($pSheet->getChartCollection() as $chart) {

				if ($chart instanceof PHPExcel_Chart) {

				    $chartCoordinates = $chart->getTopLeftPosition();

				    $chartTL = PHPExcel_Cell::coordinateFromString($chartCoordinates['cell']);

					$chartCol = PHPExcel_Cell::columnIndexFromString($chartTL[0]);

					if ($chartTL[1] > $rowMax) {

						$rowMax = $chartTL[1];

						if ($chartCol > PHPExcel_Cell::columnIndexFromString($colMax)) {

							$colMax = $chartTL[0];

						}

					}

				}

			}

		}



		foreach ($pSheet->getDrawingCollection() as $drawing) {

			if ($drawing instanceof PHPExcel_Worksheet_Drawing) {

			    $imageTL = PHPExcel_Cell::coordinateFromString($drawing->getCoordinates());

				$imageCol = PHPExcel_Cell::columnIndexFromString($imageTL[0]);

				if ($imageTL[1] > $rowMax) {

					$rowMax = $imageTL[1];

					if ($imageCol > PHPExcel_Cell::columnIndexFromString($colMax)) {

						$colMax = $imageTL[0];

					}

				}

			}

		}

		$html = '';

		$colMax++;

		while ($row < $rowMax) {

			$html .= '<tr>';

			for ($col = 'A'; $col != $colMax; ++$col) {

				$html .= '<td>';

				$html .= $this->_writeImageInCell($pSheet, $col.$row);

				if ($this->_includeCharts) {

					$html .= $this->_writeChartInCell($pSheet, $col.$row);

				}

				$html .= '</td>';

			}

			++$row;

			$html .= '</tr>';

		}

		return $html;

	}





	/**

	 * Generate image tag in cell

	 *

	 * @param	PHPExcel_Worksheet	$pSheet			PHPExcel_Worksheet

	 * @param	string				$coordinates	Cell coordinates

	 * @return	string

	 * @throws	PHPExcel_Writer_Exception

	 */

	private function _writeImageInCell(PHPExcel_Worksheet $pSheet, $coordinates) {

		// Construct HTML

		$html = '';



		// Write images

		foreach ($pSheet->getDrawingCollection() as $drawing) {

			if ($drawing instanceof PHPExcel_Worksheet_Drawing) {

				if ($drawing->getCoordinates() == $coordinates) {

					$filename = $drawing->getPath();



					// Strip off eventual '.'

					if (substr($filename, 0, 1) == '.') {

						$filename = substr($filename, 1);

					}



					// Prepend images root

					$filename = $this->getImagesRoot() . $filename;



					// Strip off eventual '.'

					if (substr($filename, 0, 1) == '.' && substr($filename, 0, 2) != './') {

						$filename = substr($filename, 1);

					}



					// Convert UTF8 data to PCDATA

					$filename = htmlspecialchars($filename);



					$html .= PHP_EOL;

					if ((!$this->_embedImages) || ($this->_isPdf)) {

						$imageData = $filename;

					} else {

						$imageDetails = getimagesize($filename);

						if ($fp = fopen($filename,"rb", 0)) {

							$picture = fread($fp,filesize($filename));

							fclose($fp);

							// base64 encode the binary data, then break it

							// into chunks according to RFC 2045 semantics

							$base64 = chunk_split(base64_encode($picture));

							$imageData = 'data:'.$imageDetails['mime'].';base64,' . $base64;

						} else {

							$imageData = $filename;

						}

					}



					$html .= '<div style="position: relative;">';

					$html .= '<img style="position: absolute; z-index: 1; left: ' . 

                        $drawing->getOffsetX() . 'px; top: ' . $drawing->getOffsetY() . 'px; width: ' . 

                        $drawing->getWidth() . 'px; height: ' . $drawing->getHeight() . 'px;" src="' . 

                        $imageData . '" border="0" />';

					$html .= '</div>';

				}

			}

		}



		// Return

		return $html;

	}



	/**

	 * Generate chart tag in cell

	 *

	 * @param	PHPExcel_Worksheet	$pSheet			PHPExcel_Worksheet

	 * @param	string				$coordinates	Cell coordinates

	 * @return	string

	 * @throws	PHPExcel_Writer_Exception

	 */

	private function _writeChartInCell(PHPExcel_Worksheet $pSheet, $coordinates) {

		// Construct HTML

		$html = '';



		// Write charts

		foreach ($pSheet->getChartCollection() as $chart) {

			if ($chart instanceof PHPExcel_Chart) {

			    $chartCoordinates = $chart->getTopLeftPosition();

				if ($chartCoordinates['cell'] == $coordinates) {

					$chartFileName = PHPExcel_Shared_File::sys_get_temp_dir().'/'.uniqid().'.png';

					if (!$chart->render($chartFileName)) {

						return;

					}



					$html .= PHP_EOL;

					$imageDetails = getimagesize($chartFileName);

					if ($fp = fopen($chartFileName,"rb", 0)) {

						$picture = fread($fp,filesize($chartFileName));

						fclose($fp);

						// base64 encode the binary data, then break it

						// into chunks according to RFC 2045 semantics

						$base64 = chunk_split(base64_encode($picture));

						$imageData = 'data:'.$imageDetails['mime'].';base64,' . $base64;



						$html .= '<div style="position: relative;">';

						$html .= '<img style="position: absolute; z-index: 1; left: ' . $chartCoordinates['xOffset'] . 'px; top: ' . $chartCoordinates['yOffset'] . 'px; width: ' . $imageDetails[0] . 'px; height: ' . $imageDetails[1] . 'px;" src="' . $imageData . '" border="0" />' . PHP_EOL;

						$html .= '</div>';



						unlink($chartFileName);

					}

				}

			}

		}



		// Return

		return $html;

	}



	/**

	 * Generate CSS styles

	 *

	 * @param	boolean	$generateSurroundingHTML	Generate surrounding HTML tags? (<style> and </style>)

	 * @return	string

	 * @throws	PHPExcel_Writer_Exception

	 */

	public function generateStyles($generateSurroundingHTML = true) {

		// PHPExcel object known?

		if (is_null($this->_phpExcel)) {

			throw new PHPExcel_Writer_Exception('Internal PHPExcel object not set to an instance of an object.');

		}



		// Build CSS

		$css = $this->buildCSS($generateSurroundingHTML);



		// Construct HTML

		$html = '';



		// Start styles

		if ($generateSurroundingHTML) {

			$html .= '	<style type="text/css">' . PHP_EOL;

			$html .= '	  html { ' . $this->_assembleCSS($css['html']) . ' }' . PHP_EOL;

		}



		// Write all other styles

		foreach ($css as $styleName => $styleDefinition) {

			if ($styleName != 'html') {

				$html .= '	  ' . $styleName . ' { ' . $this->_assembleCSS($styleDefinition) . ' }' . PHP_EOL;

			}

		}



		// End styles

		if ($generateSurroundingHTML) {

			$html .= '	</style>' . PHP_EOL;

		}



		// Return

		return $html;

	}



	/**

	 * Build CSS styles

	 *

	 * @param	boolean	$generateSurroundingHTML	Generate surrounding HTML style? (html { })

	 * @return	array

	 * @throws	PHPExcel_Writer_Exception

	 */

	public function buildCSS($generateSurroundingHTML = true) {

		// PHPExcel object known?

		if (is_null($this->_phpExcel)) {

			throw new PHPExcel_Writer_Exception('Internal PHPExcel object not set to an instance of an object.');

		}



		// Cached?

		if (!is_null($this->_cssStyles)) {

			return $this->_cssStyles;

		}



		// Ensure that spans have been calculated

		if (!$this->_spansAreCalculated) {

			$this->_calculateSpans();

		}



		// Construct CSS

		$css = array();



		// Start styles

		if ($generateSurroundingHTML) {

			// html { }

			$css['html']['font-family']	  = 'Calibri, Arial, Helvetica, sans-serif';

			$css['html']['font-size']		= '11pt';

			$css['html']['background-color'] = 'white';

		}





		// table { }

		$css['table']['border-collapse']  = 'collapse';

	    if (!$this->_isPdf) {

			$css['table']['page-break-after'] = 'always';

		}



		// .gridlines td { }

		$css['.gridlines td']['border'] = '1px dotted black';



		// .b {}

		$css['.b']['text-align'] = 'center'; // BOOL



		// .e {}

		$css['.e']['text-align'] = 'center'; // ERROR



		// .f {}

		$css['.f']['text-align'] = 'right'; // FORMULA



		// .inlineStr {}

		$css['.inlineStr']['text-align'] = 'left'; // INLINE



		// .n {}

		$css['.n']['text-align'] = 'right'; // NUMERIC



		// .s {}

		$css['.s']['text-align'] = 'left'; // STRING



		// Calculate cell style hashes

		foreach ($this->_phpExcel->getCellXfCollection() as $index => $style) {

			$css['td.style' . $index] = $this->_createCSSStyle( $style );

		}



		// Fetch sheets

		$sheets = array();

		if (is_null($this->_sheetIndex)) {

			$sheets = $this->_phpExcel->getAllSheets();

		} else {

			$sheets[] = $this->_phpExcel->getSheet($this->_sheetIndex);

		}



		// Build styles per sheet

		foreach ($sheets as $sheet) {

			// Calculate hash code

			$sheetIndex = $sheet->getParent()->getIndex($sheet);



			// Build styles

			// Calculate column widths

			$sheet->calculateColumnWidths();



			// col elements, initialize

			$highestColumnIndex = PHPExcel_Cell::columnIndexFromString($sheet->getHighestColumn()) - 1;

			$column = -1;

			while($column++ < $highestColumnIndex) {

				$this->_columnWidths[$sheetIndex][$column] = 42; // approximation

				$css['table.sheet' . $sheetIndex . ' col.col' . $column]['width'] = '42pt';

			}



			// col elements, loop through columnDimensions and set width

			foreach ($sheet->getColumnDimensions() as $columnDimension) {

				if (($width = PHPExcel_Shared_Drawing::cellDimensionToPixels($columnDimension->getWidth(), $this->_defaultFont)) >= 0) {

					$width = PHPExcel_Shared_Drawing::pixelsToPoints($width);

					$column = PHPExcel_Cell::columnIndexFromString($columnDimension->getColumnIndex()) - 1;

					$this->_columnWidths[$sheetIndex][$column] = $width;

					$css['table.sheet' . $sheetIndex . ' col.col' . $column]['width'] = $width . 'pt';



					if ($columnDimension->getVisible() === false) {

						$css['table.sheet' . $sheetIndex . ' col.col' . $column]['visibility'] = 'collapse';

						$css['table.sheet' . $sheetIndex . ' col.col' . $column]['*display'] = 'none'; // target IE6+7

					}

				}

			}



			// Default row height

			$rowDimension = $sheet->getDefaultRowDimension();



			// table.sheetN tr { }

			$css['table.sheet' . $sheetIndex . ' tr'] = array();



			if ($rowDimension->getRowHeight() == -1) {

				$pt_height = PHPExcel_Shared_Font::getDefaultRowHeightByFont($this->_phpExcel->getDefaultStyle()->getFont());

			} else {

				$pt_height = $rowDimension->getRowHeight();

			}

			$css['table.sheet' . $sheetIndex . ' tr']['height'] = $pt_height . 'pt';

			if ($rowDimension->getVisible() === false) {

				$css['table.sheet' . $sheetIndex . ' tr']['display']	= 'none';

				$css['table.sheet' . $sheetIndex . ' tr']['visibility'] = 'hidden';

			}



			// Calculate row heights

			foreach ($sheet->getRowDimensions() as $rowDimension) {

				$row = $rowDimension->getRowIndex() - 1;



				// table.sheetN tr.rowYYYYYY { }

				$css['table.sheet' . $sheetIndex . ' tr.row' . $row] = array();



				if ($rowDimension->getRowHeight() == -1) {

					$pt_height = PHPExcel_Shared_Font::getDefaultRowHeightByFont($this->_phpExcel->getDefaultStyle()->getFont());

				} else {

					$pt_height = $rowDimension->getRowHeight();

				}

				$css['table.sheet' . $sheetIndex . ' tr.row' . $row]['height'] = $pt_height . 'pt';

				if ($rowDimension->getVisible() === false) {

					$css['table.sheet' . $sheetIndex . ' tr.row' . $row]['display'] = 'none';

					$css['table.sheet' . $sheetIndex . ' tr.row' . $row]['visibility'] = 'hidden';

				}

			}

		}



		// Cache

		if (is_null($this->_cssStyles)) {

			$this->_cssStyles = $css;

		}



		// Return

		return $css;

	}



	/**

	 * Create CSS style

	 *

	 * @param	PHPExcel_Style		$pStyle			PHPExcel_Style

	 * @return	array

	 */

	private function _createCSSStyle(PHPExcel_Style $pStyle) {

		// Construct CSS

		$css = '';



		// Create CSS

		$css = array_merge(

			$this->_createCSSStyleAlignment($pStyle->getAlignment())

			, $this->_createCSSStyleBorders($pStyle->getBorders())

			, $this->_createCSSStyleFont($pStyle->getFont())

			, $this->_createCSSStyleFill($pStyle->getFill())

		);



		// Return

		return $css;

	}



	/**

	 * Create CSS style (PHPExcel_Style_Alignment)

	 *

	 * @param	PHPExcel_Style_Alignment		$pStyle			PHPExcel_Style_Alignment

	 * @return	array

	 */

	private function _createCSSStyleAlignment(PHPExcel_Style_Alignment $pStyle) {

		// Construct CSS

		$css = array();



		// Create CSS

		$css['vertical-align'] = $this->_mapVAlign($pStyle->getVertical());

		if ($textAlign = $this->_mapHAlign($pStyle->getHorizontal())) {

			$css['text-align'] = $textAlign;

			if(in_array($textAlign,array('left','right')))

				$css['padding-'.$textAlign] = (string)((int)$pStyle->getIndent() * 9).'px';

		}



		// Return

		return $css;

	}



	/**

	 * Create CSS style (PHPExcel_Style_Font)

	 *

	 * @param	PHPExcel_Style_Font		$pStyle			PHPExcel_Style_Font

	 * @return	array

	 */

	private function _createCSSStyleFont(PHPExcel_Style_Font $pStyle) {

		// Construct CSS

		$css = array();



		// Create CSS

		if ($pStyle->getBold()) {

			$css['font-weight'] = 'bold';

		}

		if ($pStyle->getUnderline() != PHPExcel_Style_Font::UNDERLINE_NONE && $pStyle->getStrikethrough()) {

			$css['text-decoration'] = 'underline line-through';

		} else if ($pStyle->getUnderline() != PHPExcel_Style_Font::UNDERLINE_NONE) {

			$css['text-decoration'] = 'underline';

		} else if ($pStyle->getStrikethrough()) {

			$css['text-decoration'] = 'line-through';

		}

		if ($pStyle->getItalic()) {

			$css['font-style'] = 'italic';

		}



		$css['color']		= '#' . $pStyle->getColor()->getRGB();

		$css['font-family']	= '\'' . $pStyle->getName() . '\'';

		$css['font-size']	= $pStyle->getSize() . 'pt';



		// Return

		return $css;

	}



	/**

	 * Create CSS style (PHPExcel_Style_Borders)

	 *

	 * @param	PHPExcel_Style_Borders		$pStyle			PHPExcel_Style_Borders

	 * @return	array

	 */

	private function _createCSSStyleBorders(PHPExcel_Style_Borders $pStyle) {

		// Construct CSS

		$css = array();



		// Create CSS

		$css['border-bottom']	= $this->_createCSSStyleBorder($pStyle->getBottom());

		$css['border-top']		= $this->_createCSSStyleBorder($pStyle->getTop());

		$css['border-left']		= $this->_createCSSStyleBorder($pStyle->getLeft());

		$css['border-right']	= $this->_createCSSStyleBorder($pStyle->getRight());



		// Return

		return $css;

	}



	/**

	 * Create CSS style (PHPExcel_Style_Border)

	 *

	 * @param	PHPExcel_Style_Border		$pStyle			PHPExcel_Style_Border

	 * @return	string

	 */

	private function _createCSSStyleBorder(PHPExcel_Style_Border $pStyle) {

		// Create CSS

//		$css = $this->_mapBorderStyle($pStyle->getBorderStyle()) . ' #' . $pStyle->getColor()->getRGB();

		//	Create CSS - add !important to non-none border styles for merged cells  

		$borderStyle = $this->_mapBorderStyle($pStyle->getBorderStyle());  

		$css = $borderStyle . ' #' . $pStyle->getColor()->getRGB() . (($borderStyle == 'none') ? '' : ' !important'); 



		// Return

		return $css;

	}



	/**

	 * Create CSS style (PHPExcel_Style_Fill)

	 *

	 * @param	PHPExcel_Style_Fill		$pStyle			PHPExcel_Style_Fill

	 * @return	array

	 */

	private function _createCSSStyleFill(PHPExcel_Style_Fill $pStyle) {

		// Construct HTML

		$css = array();



		// Create CSS

		$value = $pStyle->getFillType() == PHPExcel_Style_Fill::FILL_NONE ?

			'white' : '#' . $pStyle->getStartColor()->getRGB();

		$css['background-color'] = $value;



		// Return

		return $css;

	}



	/**

	 * Generate HTML footer

	 */

	public function generateHTMLFooter() {

		// Construct HTML

		$html = '';

		$html .= '  </body>' . PHP_EOL;

		$html .= '</html>' . PHP_EOL;



		// Return

		return $html;

	}



	/**

	 * Generate table header

	 *

	 * @param	PHPExcel_Worksheet	$pSheet		The worksheet for the table we are writing

	 * @return	string

	 * @throws	PHPExcel_Writer_Exception

	 */

	private function _generateTableHeader($pSheet) {

		$sheetIndex = $pSheet->getParent()->getIndex($pSheet);



		// Construct HTML

		$html = '';

		$html .= $this->_setMargins($pSheet);

			

		if (!$this->_useInlineCss) {

			$gridlines = $pSheet->getShowGridlines() ? ' gridlines' : '';

			$html .= '	<table border="0" cellpadding="0" cellspacing="0" id="sheet' . $sheetIndex . '" class="sheet' . $sheetIndex . $gridlines . '">' . PHP_EOL;

		} else {

			$style = isset($this->_cssStyles['table']) ?

				$this->_assembleCSS($this->_cssStyles['table']) : '';



			if ($this->_isPdf && $pSheet->getShowGridlines()) {

				$html .= '	<table border="1" cellpadding="1" id="sheet' . $sheetIndex . '" cellspacing="1" style="' . $style . '">' . PHP_EOL;

			} else {

				$html .= '	<table border="0" cellpadding="1" id="sheet' . $sheetIndex . '" cellspacing="0" style="' . $style . '">' . PHP_EOL;

			}

		}



		// Write <col> elements

		$highestColumnIndex = PHPExcel_Cell::columnIndexFromString($pSheet->getHighestColumn()) - 1;

		$i = -1;

		while($i++ < $highestColumnIndex) {

		    if (!$this->_isPdf) {

				if (!$this->_useInlineCss) {

					$html .= '		<col class="col' . $i . '">' . PHP_EOL;

				} else {

					$style = isset($this->_cssStyles['table.sheet' . $sheetIndex . ' col.col' . $i]) ?

						$this->_assembleCSS($this->_cssStyles['table.sheet' . $sheetIndex . ' col.col' . $i]) : '';

					$html .= '		<col style="' . $style . '">' . PHP_EOL;

				}

			}

		}



		// Return

		return $html;

	}



	/**

	 * Generate table footer

	 *

	 * @throws	PHPExcel_Writer_Exception

	 */

	private function _generateTableFooter() {

		// Construct HTML

		$html = '';

		$html .= '	</table>' . PHP_EOL;



		// Return

		return $html;

	}



	/**

	 * Generate row

	 *

	 * @param	PHPExcel_Worksheet	$pSheet			PHPExcel_Worksheet

	 * @param	array				$pValues		Array containing cells in a row

	 * @param	int					$pRow			Row number (0-based)

	 * @return	string

	 * @throws	PHPExcel_Writer_Exception

	 */

	private function _generateRow(PHPExcel_Worksheet $pSheet, $pValues = null, $pRow = 0) {

		if (is_array($pValues)) {

			// Construct HTML

			$html = '';



			// Sheet index

			$sheetIndex = $pSheet->getParent()->getIndex($pSheet);



			// DomPDF and breaks

			if ($this->_isPdf && count($pSheet->getBreaks()) > 0) {

				$breaks = $pSheet->getBreaks();



				// check if a break is needed before this row

				if (isset($breaks['A' . $pRow])) {

					// close table: </table>

					$html .= $this->_generateTableFooter();



					// insert page break

					$html .= '<div style="page-break-before:always" />';



					// open table again: <table> + <col> etc.

					$html .= $this->_generateTableHeader($pSheet);

				}

			}



			// Write row start

			if (!$this->_useInlineCss) {

				$html .= '		  <tr class="row' . $pRow . '">' . PHP_EOL;

			} else {

				$style = isset($this->_cssStyles['table.sheet' . $sheetIndex . ' tr.row' . $pRow])

					? $this->_assembleCSS($this->_cssStyles['table.sheet' . $sheetIndex . ' tr.row' . $pRow]) : '';



				$html .= '		  <tr style="' . $style . '">' . PHP_EOL;

			}



			// Write cells

			$colNum = 0;

			foreach ($pValues as $cellAddress) {

                $cell = ($cellAddress > '') ? $pSheet->getCell($cellAddress) : '';

				$coordinate = PHPExcel_Cell::stringFromColumnIndex($colNum) . ($pRow + 1);

				if (!$this->_useInlineCss) {

					$cssClass = '';

					$cssClass = 'column' . $colNum;

				} else {

					$cssClass = array();

					if (isset($this->_cssStyles['table.sheet' . $sheetIndex . ' td.column' . $colNum])) {

						$this->_cssStyles['table.sheet' . $sheetIndex . ' td.column' . $colNum];

					}

				}

				$colSpan = 1;

				$rowSpan = 1;



				// initialize

				$cellData = '&nbsp;';



				// PHPExcel_Cell

				if ($cell instanceof PHPExcel_Cell) {

					$cellData = '';

					if (is_null($cell->getParent())) {

						$cell->attach($pSheet);

					}

					// Value

					if ($cell->getValue() instanceof PHPExcel_RichText) {

						// Loop through rich text elements

						$elements = $cell->getValue()->getRichTextElements();

						foreach ($elements as $element) {

							// Rich text start?

							if ($element instanceof PHPExcel_RichText_Run) {

								$cellData .= '<span style="' . $this->_assembleCSS($this->_createCSSStyleFont($element->getFont())) . '">';



								if ($element->getFont()->getSuperScript()) {

									$cellData .= '<sup>';

								} else if ($element->getFont()->getSubScript()) {

									$cellData .= '<sub>';

								}

							}



							// Convert UTF8 data to PCDATA

							$cellText = $element->getText();

							$cellData .= htmlspecialchars($cellText);



							if ($element instanceof PHPExcel_RichText_Run) {

								if ($element->getFont()->getSuperScript()) {

									$cellData .= '</sup>';

								} else if ($element->getFont()->getSubScript()) {

									$cellData .= '</sub>';

								}



								$cellData .= '</span>';

							}

						}

					} else {

						if ($this->_preCalculateFormulas) {

							$cellData = PHPExcel_Style_NumberFormat::toFormattedString(

								$cell->getCalculatedValue(),

								$pSheet->getParent()->getCellXfByIndex( $cell->getXfIndex() )->getNumberFormat()->getFormatCode(),

								array($this, 'formatColor')

							);

						} else {

							$cellData = PHPExcel_Style_NumberFormat::ToFormattedString(

								$cell->getValue(),

								$pSheet->getParent()->getCellXfByIndex( $cell->getXfIndex() )->getNumberFormat()->getFormatCode(),

								array($this, 'formatColor')

							);

						}

						$cellData = htmlspecialchars($cellData);

						if ($pSheet->getParent()->getCellXfByIndex( $cell->getXfIndex() )->getFont()->getSuperScript()) {

							$cellData = '<sup>'.$cellData.'</sup>';

						} elseif ($pSheet->getParent()->getCellXfByIndex( $cell->getXfIndex() )->getFont()->getSubScript()) {

							$cellData = '<sub>'.$cellData.'</sub>';

						}

					}



					// Converts the cell content so that spaces occuring at beginning of each new line are replaced by &nbsp;

					// Example: "  Hello\n to the world" is converted to "&nbsp;&nbsp;Hello\n&nbsp;to the world"

					$cellData = preg_replace("/(?m)(?:^|\\G) /", '&nbsp;', $cellData);



					// convert newline "\n" to '<br>'

					$cellData = nl2br($cellData);



					// Extend CSS class?

					if (!$this->_useInlineCss) {

						$cssClass .= ' style' . $cell->getXfIndex();

						$cssClass .= ' ' . $cell->getDataType();

					} else {

						if (isset($this->_cssStyles['td.style' . $cell->getXfIndex()])) {

							$cssClass = array_merge($cssClass, $this->_cssStyles['td.style' . $cell->getXfIndex()]);

						}



						// General horizontal alignment: Actual horizontal alignment depends on dataType

						$sharedStyle = $pSheet->getParent()->getCellXfByIndex( $cell->getXfIndex() );

						if ($sharedStyle->getAlignment()->getHorizontal() == PHPExcel_Style_Alignment::HORIZONTAL_GENERAL

							&& isset($this->_cssStyles['.' . $cell->getDataType()]['text-align']))

						{

							$cssClass['text-align'] = $this->_cssStyles['.' . $cell->getDataType()]['text-align'];

						}

					}

				}



				// Hyperlink?

				if ($pSheet->hyperlinkExists($coordinate) && !$pSheet->getHyperlink($coordinate)->isInternal()) {

					$cellData = '<a href="' . htmlspecialchars($pSheet->getHyperlink($coordinate)->getUrl()) . '" title="' . htmlspecialchars($pSheet->getHyperlink($coordinate)->getTooltip()) . '">' . $cellData . '</a>';

				}



				// Should the cell be written or is it swallowed by a rowspan or colspan?

				$writeCell = ! ( isset($this->_isSpannedCell[$pSheet->getParent()->getIndex($pSheet)][$pRow + 1][$colNum])

							&& $this->_isSpannedCell[$pSheet->getParent()->getIndex($pSheet)][$pRow + 1][$colNum] );



				// Colspan and Rowspan

				$colspan = 1;

				$rowspan = 1;

				if (isset($this->_isBaseCell[$pSheet->getParent()->getIndex($pSheet)][$pRow + 1][$colNum])) {

					$spans = $this->_isBaseCell[$pSheet->getParent()->getIndex($pSheet)][$pRow + 1][$colNum];

					$rowSpan = $spans['rowspan'];

					$colSpan = $spans['colspan'];



					//	Also apply style from last cell in merge to fix borders -

					//		relies on !important for non-none border declarations in _createCSSStyleBorder

					$endCellCoord = PHPExcel_Cell::stringFromColumnIndex($colNum + $colSpan - 1) . ($pRow + $rowSpan);

					if (!$this->_useInlineCss) {

						$cssClass .= ' style' . $pSheet->getCell($endCellCoord)->getXfIndex();

					}

				}



				// Write

				if ($writeCell) {

					// Column start

					$html .= '			<td';

						if (!$this->_useInlineCss) {

							$html .= ' class="' . $cssClass . '"';

						} else {

							//** Necessary redundant code for the sake of PHPExcel_Writer_PDF **

							// We must explicitly write the width of the <td> element because TCPDF

							// does not recognize e.g. <col style="width:42pt">

							$width = 0;

							$i = $colNum - 1;

							$e = $colNum + $colSpan - 1;

							while($i++ < $e) {

								if (isset($this->_columnWidths[$sheetIndex][$i])) {

									$width += $this->_columnWidths[$sheetIndex][$i];

								}

							}

							$cssClass['width'] = $width . 'pt';



							// We must also explicitly write the height of the <td> element because TCPDF

							// does not recognize e.g. <tr style="height:50pt">

							if (isset($this->_cssStyles['table.sheet' . $sheetIndex . ' tr.row' . $pRow]['height'])) {

								$height = $this->_cssStyles['table.sheet' . $sheetIndex . ' tr.row' . $pRow]['height'];

								$cssClass['height'] = $height;

							}

							//** end of redundant code **



							$html .= ' style="' . $this->_assembleCSS($cssClass) . '"';

						}

						if ($colSpan > 1) {

							$html .= ' colspan="' . $colSpan . '"';

						}

						if ($rowSpan > 1) {

							$html .= ' rowspan="' . $rowSpan . '"';

						}

					$html .= '>';



					// Image?

					$html .= $this->_writeImageInCell($pSheet, $coordinate);



					// Chart?

					if ($this->_includeCharts) {

						$html .= $this->_writeChartInCell($pSheet, $coordinate);

					}



					// Cell data

					$html .= $cellData;



					// Column end

					$html .= '</td>' . PHP_EOL;

				}



				// Next column

				++$colNum;

			}



			// Write row end

			$html .= '		  </tr>' . PHP_EOL;



			// Return

			return $html;

		} else {

			throw new PHPExcel_Writer_Exception("Invalid parameters passed.");

		}

	}



	/**

	 * Takes array where of CSS properties / values and converts to CSS string

	 *

	 * @param array

	 * @return string

	 */

	private function _assembleCSS($pValue = array())

	{

		$pairs = array();

		foreach ($pValue as $property => $value) {

			$pairs[] = $property . ':' . $value;

		}

		$string = implode('; ', $pairs);



		return $string;

	}



	/**

	 * Get images root

	 *

	 * @return string

	 */

	public function getImagesRoot() {

		return $this->_imagesRoot;

	}



	/**

	 * Set images root

	 *

	 * @param string $pValue

	 * @return PHPExcel_Writer_HTML

	 */

	public function setImagesRoot($pValue = '.') {

		$this->_imagesRoot = $pValue;

		return $this;

	}



	/**

	 * Get embed images

	 *

	 * @return boolean

	 */

	public function getEmbedImages() {

		return $this->_embedImages;

	}



	/**

	 * Set embed images

	 *

	 * @param boolean $pValue

	 * @return PHPExcel_Writer_HTML

	 */

	public function setEmbedImages($pValue = '.') {

		$this->_embedImages = $pValue;

		return $this;

	}



	/**

	 * Get use inline CSS?

	 *

	 * @return boolean

	 */

	public function getUseInlineCss() {

		return $this->_useInlineCss;

	}



	/**

	 * Set use inline CSS?

	 *

	 * @param boolean $pValue

	 * @return PHPExcel_Writer_HTML

	 */

	public function setUseInlineCss($pValue = false) {

		$this->_useInlineCss = $pValue;

		return $this;

	}



	/**

	 * Add color to formatted string as inline style

	 *

	 * @param string $pValue Plain formatted value without color

	 * @param string $pFormat Format code

	 * @return string

	 */

	public function formatColor($pValue, $pFormat)

	{

		// Color information, e.g. [Red] is always at the beginning

		$color = null; // initialize

		$matches = array();



		$color_regex = '/^\\[[a-zA-Z]+\\]/';

		if (preg_match($color_regex, $pFormat, $matches)) {

			$color = str_replace('[', '', $matches[0]);

			$color = str_replace(']', '', $color);

			$color = strtolower($color);

		}



		// convert to PCDATA

		$value = htmlspecialchars($pValue);



		// color span tag

		if ($color !== null) {

			$value = '<span style="color:' . $color . '">' . $value . '</span>';

		}



		return $value;

	}



	/**

	 * Calculate information about HTML colspan and rowspan which is not always the same as Excel's

	 */

	private function _calculateSpans()

	{

		// Identify all cells that should be omitted in HTML due to cell merge.

		// In HTML only the upper-left cell should be written and it should have

		//   appropriate rowspan / colspan attribute

		$sheetIndexes = $this->_sheetIndex !== null ?

			array($this->_sheetIndex) : range(0, $this->_phpExcel->getSheetCount() - 1);



		foreach ($sheetIndexes as $sheetIndex) {

			$sheet = $this->_phpExcel->getSheet($sheetIndex);



			$candidateSpannedRow  = array();



			// loop through all Excel merged cells

			foreach ($sheet->getMergeCells() as $cells) {

				list($cells, ) = PHPExcel_Cell::splitRange($cells);

				$first = $cells[0];

				$last  = $cells[1];



				list($fc, $fr) = PHPExcel_Cell::coordinateFromString($first);

				$fc = PHPExcel_Cell::columnIndexFromString($fc) - 1;



				list($lc, $lr) = PHPExcel_Cell::coordinateFromString($last);

				$lc = PHPExcel_Cell::columnIndexFromString($lc) - 1;



				// loop through the individual cells in the individual merge

				$r = $fr - 1;

				while($r++ < $lr) {

					// also, flag this row as a HTML row that is candidate to be omitted

					$candidateSpannedRow[$r] = $r;



					$c = $fc - 1;

					while($c++ < $lc) {

						if ( !($c == $fc && $r == $fr) ) {

							// not the upper-left cell (should not be written in HTML)

							$this->_isSpannedCell[$sheetIndex][$r][$c] = array(

								'baseCell' => array($fr, $fc),

							);

						} else {

							// upper-left is the base cell that should hold the colspan/rowspan attribute

							$this->_isBaseCell[$sheetIndex][$r][$c] = array(

								'xlrowspan' => $lr - $fr + 1, // Excel rowspan

								'rowspan'   => $lr - $fr + 1, // HTML rowspan, value may change

								'xlcolspan' => $lc - $fc + 1, // Excel colspan

								'colspan'   => $lc - $fc + 1, // HTML colspan, value may change

							);

						}

					}

				}

			}



			// Identify which rows should be omitted in HTML. These are the rows where all the cells

			//   participate in a merge and the where base cells are somewhere above.

			$countColumns = PHPExcel_Cell::columnIndexFromString($sheet->getHighestColumn());

			foreach ($candidateSpannedRow as $rowIndex) {

				if (isset($this->_isSpannedCell[$sheetIndex][$rowIndex])) {

					if (count($this->_isSpannedCell[$sheetIndex][$rowIndex]) == $countColumns) {

						$this->_isSpannedRow[$sheetIndex][$rowIndex] = $rowIndex;

					};

				}

			}



			// For each of the omitted rows we found above, the affected rowspans should be subtracted by 1

			if ( isset($this->_isSpannedRow[$sheetIndex]) ) {

				foreach ($this->_isSpannedRow[$sheetIndex] as $rowIndex) {

					$adjustedBaseCells = array();

					$c = -1;

					$e = $countColumns - 1;

					while($c++ < $e) {

						$baseCell = $this->_isSpannedCell[$sheetIndex][$rowIndex][$c]['baseCell'];



						if ( !in_array($baseCell, $adjustedBaseCells) ) {

							// subtract rowspan by 1

							--$this->_isBaseCell[$sheetIndex][ $baseCell[0] ][ $baseCell[1] ]['rowspan'];

							$adjustedBaseCells[] = $baseCell;

						}

					}

				}

			}



			// TODO: Same for columns

		}



		// We have calculated the spans

		$this->_spansAreCalculated = true;

	}



	private function _setMargins(PHPExcel_Worksheet $pSheet) {

		$htmlPage = '@page { ';

		$htmlBody = 'body { ';



		$left = PHPExcel_Shared_String::FormatNumber($pSheet->getPageMargins()->getLeft()) . 'in; ';

		$htmlPage .= 'left-margin: ' . $left;

		$htmlBody .= 'left-margin: ' . $left;

		$right = PHPExcel_Shared_String::FormatNumber($pSheet->getPageMargins()->getRight()) . 'in; ';

		$htmlPage .= 'right-margin: ' . $right;

		$htmlBody .= 'right-margin: ' . $right;

		$top = PHPExcel_Shared_String::FormatNumber($pSheet->getPageMargins()->getTop()) . 'in; ';

		$htmlPage .= 'top-margin: ' . $top;

		$htmlBody .= 'top-margin: ' . $top;

		$bottom = PHPExcel_Shared_String::FormatNumber($pSheet->getPageMargins()->getBottom()) . 'in; ';

		$htmlPage .= 'bottom-margin: ' . $bottom;

		$htmlBody .= 'bottom-margin: ' . $bottom;



		$htmlPage .= "}\n";

		$htmlBody .= "}\n";



		return "<style>\n" . $htmlPage . $htmlBody . "</style>\n";

	}

	

}

