<?php
/**
 * PHPExcel
 *
 * Copyright (c) 2006 - 2008 PHPExcel
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
 *
 * @category   PHPExcel
 * @package	PHPExcel_Writer_Excel2007
 * @copyright  Copyright (c) 2006 - 2008 PHPExcel (http://www.codeplex.com/PHPExcel)
 * @license	http://www.gnu.org/licenses/old-licenses/lgpl-2.1.txt	LGPL
 * @version	1.6.3, 2008-08-25
 */



/**
 * PHPExcel_Writer_Excel2007_Worksheet
 *
 * @category   PHPExcel
 * @package	PHPExcel_Writer_Excel2007
 * @copyright  Copyright (c) 2006 - 2008 PHPExcel (http://www.codeplex.com/PHPExcel)
 */
class PHPExcel_Writer_Excel2007_Worksheet extends PHPExcel_Writer_Excel2007_WriterPart
{
	/**
	 * Write worksheet to XML format
	 *
	 * @param	PHPExcel_Worksheet		$pSheet
	 * @param	string[]				$pStringTable
	 * @return	string					XML Output
	 * @throws	Exception
	 */
	public function writeWorksheet($pSheet = null, $pStringTable = null)
	{
		if (!is_null($pSheet)) {
			// Create XML writer
			$objWriter = null;
			if ($this->getParentWriter()->getUseDiskCaching()) {
				$objWriter = new PHPExcel_Shared_XMLWriter(PHPExcel_Shared_XMLWriter::STORAGE_DISK);
			} else {
				$objWriter = new PHPExcel_Shared_XMLWriter(PHPExcel_Shared_XMLWriter::STORAGE_MEMORY);
			}

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

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

				// sheetPr
				$this->_writeSheetPr($objWriter, $pSheet);

				// Dimension
				$this->_writeDimension($objWriter, $pSheet);

				// sheetViews
				$this->_writeSheetViews($objWriter, $pSheet);

				// sheetFormatPr
				$this->_writeSheetFormatPr($objWriter, $pSheet);

				// cols
				$this->_writeCols($objWriter, $pSheet);

				// sheetData
				$this->_writeSheetData($objWriter, $pSheet, $pStringTable);

				// sheetProtection
				$this->_writeSheetProtection($objWriter, $pSheet);

				// protectedRanges
				$this->_writeProtectedRanges($objWriter, $pSheet);

				// autoFilter
				$this->_writeAutoFilter($objWriter, $pSheet);

				// mergeCells
				$this->_writeMergeCells($objWriter, $pSheet);

				// conditionalFormatting
				$this->_writeConditionalFormatting($objWriter, $pSheet);

				// dataValidations
				$this->_writeDataValidations($objWriter, $pSheet);

				// hyperlinks
				$this->_writeHyperlinks($objWriter, $pSheet);

				// Print options
				$this->_writePrintOptions($objWriter, $pSheet);

				// Page margins
				$this->_writePageMargins($objWriter, $pSheet);

				// Page setup
				$this->_writePageSetup($objWriter, $pSheet);

				// Header / footer
				$this->_writeHeaderFooter($objWriter, $pSheet);

				// Breaks
				$this->_writeBreaks($objWriter, $pSheet);

				// Drawings
				$this->_writeDrawings($objWriter, $pSheet);

				// LegacyDrawing
				$this->_writeLegacyDrawing($objWriter, $pSheet);

				// LegacyDrawingHF
				$this->_writeLegacyDrawingHF($objWriter, $pSheet);

			$objWriter->endElement();

			// Return
			return $objWriter->getData();
		} else {
			throw new Exception("Invalid PHPExcel_Worksheet object passed.");
		}
	}

	/**
	 * Write SheetPr
	 *
	 * @param	PHPExcel_Shared_XMLWriter		$objWriter		XML Writer
	 * @param	PHPExcel_Worksheet				$pSheet			Worksheet
	 * @throws	Exception
	 */
	private function _writeSheetPr(PHPExcel_Shared_XMLWriter $objWriter = null, PHPExcel_Worksheet $pSheet = null)
	{
		// sheetPr
		$objWriter->startElement('sheetPr');
		$objWriter->writeAttribute('codeName',		$pSheet->getTitle());

			// outlinePr
			$objWriter->startElement('outlinePr');
			$objWriter->writeAttribute('summaryBelow',	($pSheet->getShowSummaryBelow() ? '1' : '0'));
			$objWriter->writeAttribute('summaryRight',	($pSheet->getShowSummaryRight() ? '1' : '0'));
			$objWriter->endElement();

			// pageSetUpPr
			if (!is_null($pSheet->getPageSetup()->getFitToHeight()) || !is_null($pSheet->getPageSetup()->getFitToWidth())) {
				$objWriter->startElement('pageSetUpPr');
				$objWriter->writeAttribute('fitToPage',	'1');
				$objWriter->endElement();
			}

		$objWriter->endElement();
	}

	/**
	 * Write Dimension
	 *
	 * @param	PHPExcel_Shared_XMLWriter	$objWriter		XML Writer
	 * @param	PHPExcel_Worksheet			$pSheet			Worksheet
	 * @throws	Exception
	 */
	private function _writeDimension(PHPExcel_Shared_XMLWriter $objWriter = null, PHPExcel_Worksheet $pSheet = null)
	{
		// dimension
		$objWriter->startElement('dimension');
		$objWriter->writeAttribute('ref', $pSheet->calculateWorksheetDimension());
		$objWriter->endElement();
	}

	/**
	 * Write SheetViews
	 *
	 * @param	PHPExcel_Shared_XMLWriter			$objWriter		XML Writer
	 * @param	PHPExcel_Worksheet					$pSheet			Worksheet
	 * @throws	Exception
	 */
	private function _writeSheetViews(PHPExcel_Shared_XMLWriter $objWriter = null, PHPExcel_Worksheet $pSheet = null)
	{
		// sheetViews
		$objWriter->startElement('sheetViews');

			// sheetView
			$objWriter->startElement('sheetView');
			$objWriter->writeAttribute('tabSelected',		'1');
			$objWriter->writeAttribute('workbookViewId',	'0');

				// Gridlines
				if ($pSheet->getShowGridlines()) {
					$objWriter->writeAttribute('showGridLines',	'true');
				}

				// Pane
				if ($pSheet->getFreezePane() != '') {
					// Calculate freeze coordinates
					$xSplit = 0;
					$ySplit = 0;
					$topLeftCell = $pSheet->getFreezePane();

					list($xSplit, $ySplit) = PHPExcel_Cell::coordinateFromString($pSheet->getFreezePane());
					$xSplit = PHPExcel_Cell::columnIndexFromString($xSplit);

					// pane
					$objWriter->startElement('pane');
					$objWriter->writeAttribute('xSplit',		$xSplit - 1);
					$objWriter->writeAttribute('ySplit',		$ySplit - 1);
					$objWriter->writeAttribute('topLeftCell',	$topLeftCell);
					$objWriter->writeAttribute('activePane',	'bottomRight');
					$objWriter->writeAttribute('state',		'frozen');
					$objWriter->endElement();
				}

				// Selection
				$objWriter->startElement('selection');
				$objWriter->writeAttribute('activeCell', $pSheet->getSelectedCell());
				$objWriter->writeAttribute('sqref',	  $pSheet->getSelectedCell());
				$objWriter->endElement();

			$objWriter->endElement();

		$objWriter->endElement();
	}

	/**
	 * Write SheetFormatPr
	 *
	 * @param	PHPExcel_Shared_XMLWriter $objWriter		XML Writer
	 * @param	PHPExcel_Worksheet		  $pSheet			Worksheet
	 * @throws	Exception
	 */
	private function _writeSheetFormatPr(PHPExcel_Shared_XMLWriter $objWriter = null, PHPExcel_Worksheet $pSheet = null)
	{
		// sheetFormatPr
		$objWriter->startElement('sheetFormatPr');

			// Default row height
			if ($pSheet->getDefaultRowDimension()->getRowHeight() >= 0) {
				$objWriter->writeAttribute('customHeight',		'true');
				$objWriter->writeAttribute('defaultRowHeight', 	PHPExcel_Shared_String::FormatNumber($pSheet->getDefaultRowDimension()->getRowHeight()));
			} else {
				$objWriter->writeAttribute('defaultRowHeight', 	'12.75');
			}

			// Default column width
			if ($pSheet->getDefaultColumnDimension()->getWidth() >= 0) {
				$objWriter->writeAttribute('defaultColWidth', 	PHPExcel_Shared_String::FormatNumber($pSheet->getDefaultColumnDimension()->getWidth()));
			}

			// Outline level - row
			$outlineLevelRow = 0;
			foreach ($pSheet->getRowDimensions() as $dimension) {
				if ($dimension->getOutlineLevel() > $outlineLevelRow) {
					$outlineLevelRow = $dimension->getOutlineLevel();
				}
			}
			$objWriter->writeAttribute('outlineLevelRow', 		(int)$outlineLevelRow);

			// Outline level - column
			$outlineLevelCol = 0;
			foreach ($pSheet->getColumnDimensions() as $dimension) {
				if ($dimension->getOutlineLevel() > $outlineLevelCol) {
					$outlineLevelCol = $dimension->getOutlineLevel();
				}
			}
			$objWriter->writeAttribute('outlineLevelCol', 		(int)$outlineLevelCol);

		$objWriter->endElement();
	}

	/**
	 * Write Cols
	 *
	 * @param	PHPExcel_Shared_XMLWriter			$objWriter		XML Writer
	 * @param	PHPExcel_Worksheet					$pSheet			Worksheet
	 * @throws	Exception
	 */
	private function _writeCols(PHPExcel_Shared_XMLWriter $objWriter = null, PHPExcel_Worksheet $pSheet = null)
	{
		// cols
		$objWriter->startElement('cols');

			// Check if there is at least one column dimension specified. If not, create one.
			if (count($pSheet->getColumnDimensions()) == 0) {
				$pSheet->getColumnDimension('A')->setWidth(10);
			}

			$pSheet->calculateColumnWidths();

			// Loop trough column dimensions
			foreach ($pSheet->getColumnDimensions() as $colDimension) {
				// col
				$objWriter->startElement('col');
				$objWriter->writeAttribute('min',	PHPExcel_Cell::columnIndexFromString($colDimension->getColumnIndex()));
				$objWriter->writeAttribute('max',	PHPExcel_Cell::columnIndexFromString($colDimension->getColumnIndex()));

				if ($colDimension->getWidth() < 0) {
					// No width set, apply default of 10
					$objWriter->writeAttribute('width',		'10');
				} else {
					// Width set
					$objWriter->writeAttribute('width',		PHPExcel_Shared_String::FormatNumber($colDimension->getWidth()));
				}

				// Column visibility
				if ($colDimension->getVisible() == false) {
					$objWriter->writeAttribute('hidden',		'true');
				}

				// Auto size?
				if ($colDimension->getAutoSize()) {
					$objWriter->writeAttribute('bestFit',		'true');
				} else {
					$objWriter->writeAttribute('customWidth',	'true');
				}

				// Collapsed
				if ($colDimension->getCollapsed() == true) {
					$objWriter->writeAttribute('collapsed',		'true');
				}

				// Outline level
				if ($colDimension->getOutlineLevel() > 0) {
					$objWriter->writeAttribute('outlineLevel',	$colDimension->getOutlineLevel());
				}

				$objWriter->endElement();
			}

		$objWriter->endElement();
	}

	/**
	 * Write SheetProtection
	 *
	 * @param	PHPExcel_Shared_XMLWriter			$objWriter		XML Writer
	 * @param	PHPExcel_Worksheet					$pSheet			Worksheet
	 * @throws	Exception
	 */
	private function _writeSheetProtection(PHPExcel_Shared_XMLWriter $objWriter = null, PHPExcel_Worksheet $pSheet = null)
	{
		// sheetProtection
		$objWriter->startElement('sheetProtection');

		if ($pSheet->getProtection()->getPassword() != '') {
			$objWriter->writeAttribute('password',				$pSheet->getProtection()->getPassword());
		}

		$objWriter->writeAttribute('sheet',				($pSheet->getProtection()->getSheet()				? 'true' : 'false'));
		$objWriter->writeAttribute('objects',				($pSheet->getProtection()->getObjects()			? 'true' : 'false'));
		$objWriter->writeAttribute('scenarios',			($pSheet->getProtection()->getScenarios()			? 'true' : 'false'));
		$objWriter->writeAttribute('formatCells',			($pSheet->getProtection()->getFormatCells()		? 'true' : 'false'));
		$objWriter->writeAttribute('formatColumns',		($pSheet->getProtection()->getFormatColumns()		? 'true' : 'false'));
		$objWriter->writeAttribute('formatRows',			($pSheet->getProtection()->getFormatRows()			? 'true' : 'false'));
		$objWriter->writeAttribute('insertColumns',		($pSheet->getProtection()->getInsertColumns()		? 'true' : 'false'));
		$objWriter->writeAttribute('insertRows',			($pSheet->getProtection()->getInsertRows()			? 'true' : 'false'));
		$objWriter->writeAttribute('insertHyperlinks',		($pSheet->getProtection()->getInsertHyperlinks()	? 'true' : 'false'));
		$objWriter->writeAttribute('deleteColumns',		($pSheet->getProtection()->getDeleteColumns()		? 'true' : 'false'));
		$objWriter->writeAttribute('deleteRows',			($pSheet->getProtection()->getDeleteRows()			? 'true' : 'false'));
		$objWriter->writeAttribute('selectLockedCells',	($pSheet->getProtection()->getSelectLockedCells()	? 'true' : 'false'));
		$objWriter->writeAttribute('sort',					($pSheet->getProtection()->getSort()				? 'true' : 'false'));
		$objWriter->writeAttribute('autoFilter',			($pSheet->getProtection()->getAutoFilter()			? 'true' : 'false'));
		$objWriter->writeAttribute('pivotTables',			($pSheet->getProtection()->getPivotTables()		? 'true' : 'false'));
		$objWriter->writeAttribute('selectUnlockedCells',	($pSheet->getProtection()->getSelectUnlockedCells()	? 'true' : 'false'));
		$objWriter->endElement();
	}

	/**
	 * Write ConditionalFormatting
	 *
	 * @param	PHPExcel_Shared_XMLWriter			$objWriter		XML Writer
	 * @param	PHPExcel_Worksheet					$pSheet			Worksheet
	 * @throws	Exception
	 */
	private function _writeConditionalFormatting(PHPExcel_Shared_XMLWriter $objWriter = null, PHPExcel_Worksheet $pSheet = null)
	{
		// Conditional id
		$id = 1;

		// Loop trough styles in the current worksheet
		foreach ($pSheet->getStyles() as $cellCoordinate => $style) {
			if (count($style->getConditionalStyles()) > 0) {
				foreach ($style->getConditionalStyles() as $conditional) {
					// WHY was this again?
					// if ($this->getParentWriter()->getStylesConditionalHashTable()->getIndexForHashCode( $conditional->getHashCode() ) == '') {
					//	continue;
					// }

					if ($conditional->getConditionType() != PHPExcel_Style_Conditional::CONDITION_NONE) {
						// conditionalFormatting
						$objWriter->startElement('conditionalFormatting');
						$objWriter->writeAttribute('sqref',	$cellCoordinate);

							// cfRule
							$objWriter->startElement('cfRule');
							$objWriter->writeAttribute('type',		$conditional->getConditionType());
							$objWriter->writeAttribute('dxfId',	$this->getParentWriter()->getStylesConditionalHashTable()->getIndexForHashCode( $conditional->getHashCode() ));
							$objWriter->writeAttribute('priority',	$id++);

							if ($conditional->getConditionType() == PHPExcel_Style_Conditional::CONDITION_CELLIS
								&& $conditional->getOperatorType() != PHPExcel_Style_Conditional::OPERATOR_NONE) {
								$objWriter->writeAttribute('operator',	$conditional->getOperatorType());
							}

							if ($conditional->getConditionType() == PHPExcel_Style_Conditional::CONDITION_CELLIS
								|| $conditional->getConditionType() == PHPExcel_Style_Conditional::CONDITION_CONTAINSTEXT
								|| $conditional->getConditionType() == PHPExcel_Style_Conditional::CONDITION_EXPRESSION) {
								// Formula
								$objWriter->writeElement('formula',	$conditional->getCondition());
							}

							$objWriter->endElement();

						$objWriter->endElement();
					}
				}
			}
		}
	}

	/**
	 * Write DataValidations
	 *
	 * @param	PHPExcel_Shared_XMLWriter			$objWriter		XML Writer
	 * @param	PHPExcel_Worksheet					$pSheet			Worksheet
	 * @throws	Exception
	 */
	private function _writeDataValidations(PHPExcel_Shared_XMLWriter $objWriter = null, PHPExcel_Worksheet $pSheet = null)
	{
		// Build a temporary array of datavalidation objects
		$aDataValidations = array();
		foreach ($pSheet->getCellCollection() as $cell) {
			if ($cell->hasDataValidation()) {
				$aDataValidations[] = $cell->getDataValidation();
			}
		}

		// Write data validations?
		if (count($aDataValidations) > 0) {
			$objWriter->startElement('dataValidations');
			$objWriter->writeAttribute('count',	count($aDataValidations));

			foreach ($aDataValidations as $dv) {
				$objWriter->startElement('dataValidation');

				if ($dv->getType() != '') {
					$objWriter->writeAttribute('type', $dv->getType());
				}

				if ($dv->getErrorStyle() != '') {
					$objWriter->writeAttribute('errorStyle', $dv->getErrorStyle());
				}

				if ($dv->getOperator() != '') {
					$objWriter->writeAttribute('operator', $dv->getOperator());
				}

				$objWriter->writeAttribute('allowBlank',		($dv->getAllowBlank()		? '1'  : '0'));
				$objWriter->writeAttribute('showDropDown',		(!$dv->getShowDropDown()	? '1'  : '0'));
				$objWriter->writeAttribute('showInputMessage',	($dv->getShowInputMessage()	? '1'  : '0'));
				$objWriter->writeAttribute('showErrorMessage',	($dv->getShowErrorMessage()	? '1'  : '0'));

				if ($dv->getErrorTitle() != '') {
					$objWriter->writeAttribute('errorTitle', $dv->getErrorTitle());
				}
				if ($dv->getError() != '') {
					$objWriter->writeAttribute('error', $dv->getError());
				}
				if ($dv->getPromptTitle() != '') {
					$objWriter->writeAttribute('promptTitle', $dv->getPromptTitle());
				}
				if ($dv->getPrompt() != '') {
					$objWriter->writeAttribute('prompt', $dv->getPrompt());
				}


				$objWriter->writeAttribute('sqref', $dv->getParent()->getCoordinate());

				if ($dv->getFormula1() != '') {
					$objWriter->writeElement('formula1', $dv->getFormula1());
				}
				if ($dv->getFormula2() != '') {
					$objWriter->writeElement('formula2', $dv->getFormula2());
				}

				$objWriter->endElement();
			}

			$objWriter->endElement();
		}
	}

	/**
	 * Write Hyperlinks
	 *
	 * @param	PHPExcel_Shared_XMLWriter			$objWriter		XML Writer
	 * @param	PHPExcel_Worksheet					$pSheet			Worksheet
	 * @throws	Exception
	 */
	private function _writeHyperlinks(PHPExcel_Shared_XMLWriter $objWriter = null, PHPExcel_Worksheet $pSheet = null)
	{
		// Build a temporary array of hyperlink objects
		$aHyperlinks = array();
		foreach ($pSheet->getCellCollection() as $cell) {
			if ($cell->hasHyperlink()) {
				$aHyperlinks[] = $cell->getHyperlink();
			}
		}

		// Relation ID
		$relationId = 1;

		// Write hyperlinks?
		if (count($aHyperlinks) > 0) {
			$objWriter->startElement('hyperlinks');

			foreach ($aHyperlinks as $hyperlink) {
				$objWriter->startElement('hyperlink');

				$objWriter->writeAttribute('ref',	$hyperlink->getParent()->getCoordinate());
				if (!$hyperlink->isInternal()) {
					$objWriter->writeAttribute('r:id',	'rId_hyperlink_' . $relationId);
					$relationId++;
				} else {
					$objWriter->writeAttribute('location',	str_replace('sheet://', '', $hyperlink->getUrl()));
				}

				if ($hyperlink->getTooltip() != '') {
					$objWriter->writeAttribute('tooltip', $hyperlink->getTooltip());
				}

				$objWriter->endElement();
			}

			$objWriter->endElement();
		}
	}

	/**
	 * Write ProtectedRanges
	 *
	 * @param	PHPExcel_Shared_XMLWriter			$objWriter		XML Writer
	 * @param	PHPExcel_Worksheet					$pSheet			Worksheet
	 * @throws	Exception
	 */
	private function _writeProtectedRanges(PHPExcel_Shared_XMLWriter $objWriter = null, PHPExcel_Worksheet $pSheet = null)
	{
		if (count($pSheet->getProtectedCells()) > 0) {
			// protectedRanges
			$objWriter->startElement('protectedRanges');

				// Loop protectedRanges
				foreach ($pSheet->getProtectedCells() as $protectedCell => $passwordHash) {
					// protectedRange
					$objWriter->startElement('protectedRange');
					$objWriter->writeAttribute('name',		'p' . md5($protectedCell));
					$objWriter->writeAttribute('sqref',	$protectedCell);
					$objWriter->writeAttribute('password',	$passwordHash);
					$objWriter->endElement();
				}

			$objWriter->endElement();
		}
	}


	/**
	 * Write MergeCells
	 *
	 * @param	PHPExcel_Shared_XMLWriter			$objWriter		XML Writer
	 * @param	PHPExcel_Worksheet					$pSheet			Worksheet
	 * @throws	Exception
	 */
	private function _writeMergeCells(PHPExcel_Shared_XMLWriter $objWriter = null, PHPExcel_Worksheet $pSheet = null)
	{
		if (count($pSheet->getMergeCells()) > 0) {
			// mergeCells
			$objWriter->startElement('mergeCells');

				// Loop mergeCells
				foreach ($pSheet->getMergeCells() as $mergeCell) {
					// mergeCell
					$objWriter->startElement('mergeCell');
					$objWriter->writeAttribute('ref', $mergeCell);
					$objWriter->endElement();
				}

			$objWriter->endElement();
		}
	}

	/**
	 * Write PrintOptions
	 *
	 * @param	PHPExcel_Shared_XMLWriter			$objWriter		XML Writer
	 * @param	PHPExcel_Worksheet					$pSheet			Worksheet
	 * @throws	Exception
	 */
	private function _writePrintOptions(PHPExcel_Shared_XMLWriter $objWriter = null, PHPExcel_Worksheet $pSheet = null)
	{
		// printOptions
		$objWriter->startElement('printOptions');

		$objWriter->writeAttribute('gridLines',	($pSheet->getPrintGridlines() ? 'true': 'false'));
		$objWriter->writeAttribute('gridLinesSet',	($pSheet->getShowGridlines() ? 'true': 'false'));

		if ($pSheet->getPageSetup()->getHorizontalCentered()) {
			$objWriter->writeAttribute('horizontalCentered', 'true');
		}

		if ($pSheet->getPageSetup()->getVerticalCentered()) {
			$objWriter->writeAttribute('verticalCentered', 'true');
		}

		$objWriter->endElement();
	}

	/**
	 * Write PageMargins
	 *
	 * @param	PHPExcel_Shared_XMLWriter				$objWriter		XML Writer
	 * @param	PHPExcel_Worksheet						$pSheet			Worksheet
	 * @throws	Exception
	 */
	private function _writePageMargins(PHPExcel_Shared_XMLWriter $objWriter = null, PHPExcel_Worksheet $pSheet = null)
	{
		// pageMargins
		$objWriter->startElement('pageMargins');
		$objWriter->writeAttribute('left',		PHPExcel_Shared_String::FormatNumber($pSheet->getPageMargins()->getLeft()));
		$objWriter->writeAttribute('right',		PHPExcel_Shared_String::FormatNumber($pSheet->getPageMargins()->getRight()));
		$objWriter->writeAttribute('top',		PHPExcel_Shared_String::FormatNumber($pSheet->getPageMargins()->getTop()));
		$objWriter->writeAttribute('bottom',	PHPExcel_Shared_String::FormatNumber($pSheet->getPageMargins()->getBottom()));
		$objWriter->writeAttribute('header',	PHPExcel_Shared_String::FormatNumber($pSheet->getPageMargins()->getHeader()));
		$objWriter->writeAttribute('footer',	PHPExcel_Shared_String::FormatNumber($pSheet->getPageMargins()->getFooter()));
		$objWriter->endElement();
	}

	/**
	 * Write AutoFilter
	 *
	 * @param	PHPExcel_Shared_XMLWriter				$objWriter		XML Writer
	 * @param	PHPExcel_Worksheet						$pSheet			Worksheet
	 * @throws	Exception
	 */
	private function _writeAutoFilter(PHPExcel_Shared_XMLWriter $objWriter = null, PHPExcel_Worksheet $pSheet = null)
	{
		if ($pSheet->getAutoFilter() != '') {
			// autoFilter
			$objWriter->startElement('autoFilter');
			$objWriter->writeAttribute('ref',		$pSheet->getAutoFilter());
			$objWriter->endElement();
		}
	}

	/**
	 * Write PageSetup
	 *
	 * @param	PHPExcel_Shared_XMLWriter			$objWriter		XML Writer
	 * @param	PHPExcel_Worksheet					$pSheet			Worksheet
	 * @throws	Exception
	 */
	private function _writePageSetup(PHPExcel_Shared_XMLWriter $objWriter = null, PHPExcel_Worksheet $pSheet = null)
	{
		// pageSetup
		$objWriter->startElement('pageSetup');
		$objWriter->writeAttribute('paperSize',		$pSheet->getPageSetup()->getPaperSize());
		$objWriter->writeAttribute('orientation',	$pSheet->getPageSetup()->getOrientation());

		if (!is_null($pSheet->getPageSetup()->getScale())) {
			$objWriter->writeAttribute('scale',	$pSheet->getPageSetup()->getScale());
		}
		if (!is_null($pSheet->getPageSetup()->getFitToHeight())) {
			$objWriter->writeAttribute('fitToHeight',	$pSheet->getPageSetup()->getFitToHeight());
		}
		if (!is_null($pSheet->getPageSetup()->getFitToWidth())) {
			$objWriter->writeAttribute('fitToWidth',	$pSheet->getPageSetup()->getFitToWidth());
		}

		$objWriter->endElement();
	}

	/**
	 * Write Header / Footer
	 *
	 * @param	PHPExcel_Shared_XMLWriter		$objWriter		XML Writer
	 * @param	PHPExcel_Worksheet				$pSheet			Worksheet
	 * @throws	Exception
	 */
	private function _writeHeaderFooter(PHPExcel_Shared_XMLWriter $objWriter = null, PHPExcel_Worksheet $pSheet = null)
	{
		// headerFooter
		$objWriter->startElement('headerFooter');
		$objWriter->writeAttribute('differentOddEven',	($pSheet->getHeaderFooter()->getDifferentOddEven() ? 'true' : 'false'));
		$objWriter->writeAttribute('differentFirst',	($pSheet->getHeaderFooter()->getDifferentFirst() ? 'true' : 'false'));
		$objWriter->writeAttribute('scaleWithDoc',		($pSheet->getHeaderFooter()->getScaleWithDocument() ? 'true' : 'false'));
		$objWriter->writeAttribute('alignWithMargins',	($pSheet->getHeaderFooter()->getAlignWithMargins() ? 'true' : 'false'));

			$objWriter->writeElement('oddHeader',		$pSheet->getHeaderFooter()->getOddHeader());
			$objWriter->writeElement('oddFooter',		$pSheet->getHeaderFooter()->getOddFooter());
			$objWriter->writeElement('evenHeader',		$pSheet->getHeaderFooter()->getEvenHeader());
			$objWriter->writeElement('evenFooter',		$pSheet->getHeaderFooter()->getEvenFooter());
			$objWriter->writeElement('firstHeader',	$pSheet->getHeaderFooter()->getFirstHeader());
			$objWriter->writeElement('firstFooter',	$pSheet->getHeaderFooter()->getFirstFooter());
		$objWriter->endElement();
	}

	/**
	 * Write Breaks
	 *
	 * @param	PHPExcel_Shared_XMLWriter		$objWriter		XML Writer
	 * @param	PHPExcel_Worksheet				$pSheet			Worksheet
	 * @throws	Exception
	 */
	private function _writeBreaks(PHPExcel_Shared_XMLWriter $objWriter = null, PHPExcel_Worksheet $pSheet = null)
	{
		// Get row and column breaks
		$aRowBreaks = array();
		$aColumnBreaks = array();
		foreach ($pSheet->getBreaks() as $cell => $breakType) {
			if ($breakType == PHPExcel_Worksheet::BREAK_ROW) {
				array_push($aRowBreaks, $cell);
			} else if ($breakType == PHPExcel_Worksheet::BREAK_COLUMN) {
				array_push($aColumnBreaks, $cell);
			}
		}

		// rowBreaks
		if (count($aRowBreaks) > 0) {
			$objWriter->startElement('rowBreaks');
			$objWriter->writeAttribute('count',			count($aRowBreaks));
			$objWriter->writeAttribute('manualBreakCount',	count($aRowBreaks));

				foreach ($aRowBreaks as $cell) {
					$coords = PHPExcel_Cell::coordinateFromString($cell);

					$objWriter->startElement('brk');
					$objWriter->writeAttribute('id',	$coords[1]);
					$objWriter->writeAttribute('man',	'1');
					$objWriter->endElement();
				}

			$objWriter->endElement();
		}

		// Second, write column breaks
		if (count($aColumnBreaks) > 0) {
			$objWriter->startElement('colBreaks');
			$objWriter->writeAttribute('count',			count($aColumnBreaks));
			$objWriter->writeAttribute('manualBreakCount',	count($aColumnBreaks));

				foreach ($aColumnBreaks as $cell) {
					$coords = PHPExcel_Cell::coordinateFromString($cell);

					$objWriter->startElement('brk');
					$objWriter->writeAttribute('id',	PHPExcel_Cell::columnIndexFromString($coords[0]) - 1);
					$objWriter->writeAttribute('man',	'1');
					$objWriter->endElement();
				}

			$objWriter->endElement();
		}
	}

	/**
	 * Write SheetData
	 *
	 * @param	PHPExcel_Shared_XMLWriter		$objWriter		XML Writer
	 * @param	PHPExcel_Worksheet				$pSheet			Worksheet
	 * @param	string[]						$pStringTable	String table
	 * @throws	Exception
	 */
	private function _writeSheetData(PHPExcel_Shared_XMLWriter $objWriter = null, PHPExcel_Worksheet $pSheet = null, $pStringTable = null)
	{
		if (is_array($pStringTable)) {
			// Flipped stringtable, for faster index searching
			$aFlippedStringTable = $this->getParentWriter()->getWriterPart('stringtable')->flipStringTable($pStringTable);

			// sheetData
			$objWriter->startElement('sheetData');

				// Get column count
				$colCount = PHPExcel_Cell::columnIndexFromString($pSheet->getHighestColumn());

				// Highest row number
				$highestRow = $pSheet->getHighestRow();

				// Loop trough cells
				$cellCollection = $pSheet->getCellCollection();
				for ($currentRow = 1; $currentRow <= $highestRow; $currentRow++) {
						// Get row dimension
						$rowDimension = $pSheet->getRowDimension($currentRow);

						// Start a new row
						$objWriter->startElement('row');
						$objWriter->writeAttribute('r',	$currentRow);
						$objWriter->writeAttribute('spans',	'1:' . $colCount);

						// Row dimensions
						if ($rowDimension->getRowHeight() >= 0) {
							$objWriter->writeAttribute('customHeight',	'1');
							$objWriter->writeAttribute('ht',			$rowDimension->getRowHeight());
						}

						// Row visibility
						if ($rowDimension->getVisible() == false) {
							$objWriter->writeAttribute('hidden',		'true');
						}

						// Collapsed
						if ($rowDimension->getCollapsed() == true) {
							$objWriter->writeAttribute('collapsed',		'true');
						}

						// Outline level
						if ($rowDimension->getOutlineLevel() > 0) {
							$objWriter->writeAttribute('outlineLevel',	$rowDimension->getOutlineLevel());
						}

						// Write cells
						$rowPassed = false;
						foreach ($cellCollection as $cell) {
							if ($currentRow == $cell->getRow()) {
								// Write cell
								$this->_writeCell($objWriter, $pSheet, $cell, $pStringTable, $aFlippedStringTable);

								// Speed things up...
								$rowPassed = true;
								unset($cellCollection[$cell->getCoordinate()]);
							} else {
								if ($rowPassed) {
									break;
								}
							}
						}

						// End row
						$objWriter->endElement();
				}

			$objWriter->endElement();
		} else {
			throw new Exception("Invalid parameters passed.");
		}
	}

	/**
	 * Write Cell
	 *
	 * @param	PHPExcel_Shared_XMLWriter	$objWriter				XML Writer
	 * @param	PHPExcel_Worksheet			$pSheet					Worksheet
	 * @param	PHPExcel_Cell				$pCell					Cell
	 * @param	string[]					$pStringTable			String table
	 * @param	string[]					$pFlippedStringTable	String table (flipped), for faster index searching
	 * @throws	Exception
	 */
	private function _writeCell(PHPExcel_Shared_XMLWriter $objWriter = null, PHPExcel_Worksheet $pSheet = null, PHPExcel_Cell $pCell = null, $pStringTable = null, $pFlippedStringTable = null)
	{
		if (is_array($pStringTable) && is_array($pFlippedStringTable)) {
			// Cell
			$objWriter->startElement('c');
			$objWriter->writeAttribute('r', $pCell->getCoordinate());

			// Sheet styles
			$aStyles = $pSheet->getStyles();
			if (isset($aStyles[$pCell->getCoordinate()])) {
				$styleIndex = $this->getParentWriter()->getStylesHashTable()->getIndexForHashCode( $aStyles[$pCell->getCoordinate()]->getHashCode() );
				if ($styleIndex != '') {
					$objWriter->writeAttribute('s', $styleIndex);
				}
			}

			// If cell value is supplied, write cell value
			if (is_object($pCell->getValue()) || $pCell->getValue() !== '') {
				// Map type
				$mappedType = $pCell->getDataType();

				// Write data type depending on its type
				switch (strtolower($mappedType)) {
					case 'inlinestr':	// Inline string
						$objWriter->writeAttribute('t', $mappedType);
						break;
					case 's':			// String
						$objWriter->writeAttribute('t', $mappedType);
						break;
					case 'b':			// Boolean
						$objWriter->writeAttribute('t', $mappedType);
						break;
					case 'f':			// Formula
						$calculatedValue = null;
						if ($this->getParentWriter()->getPreCalculateFormulas()) {
							$calculatedValue = $pCell->getCalculatedValue();
						} else {
							$calculatedValue = $pCell->getValue();
						}
						if (is_string($calculatedValue)) {
							$objWriter->writeAttribute('t', 'str');
						}
						break;
				}

				// Write data depending on its type
				switch (strtolower($mappedType)) {
					case 'inlinestr':	// Inline string
						if (! $pCell->getValue() instanceof PHPExcel_RichText) {
							$objWriter->writeElement('t', PHPExcel_Shared_String::ControlCharacterPHP2OOXML( $pCell->getValue()) );
						} else if ($pCell->getValue() instanceof PHPExcel_RichText) {
							$objWriter->startElement('is');
							$this->getParentWriter()->getWriterPart('stringtable')->writeRichText($objWriter, $pCell->getValue());
							$objWriter->endElement();
						}

						break;
					case 's':			// String
						if (! $pCell->getValue() instanceof PHPExcel_RichText) {
							if (isset($pFlippedStringTable[$pCell->getValue()])) {
								$objWriter->writeElement('v', $pFlippedStringTable[$pCell->getValue()]);
							}
						} else if ($pCell->getValue() instanceof PHPExcel_RichText) {
							$objWriter->writeElement('v', $pFlippedStringTable[$pCell->getValue()->getHashCode()]);
						}

						break;
					case 'f':			// Formula
						$objWriter->writeElement('f', substr($pCell->getValue(), 1));
						if ($this->getParentWriter()->getOffice2003Compatibility() === false) {
							if ($this->getParentWriter()->getPreCalculateFormulas()) {
								$calculatedValue = $pCell->getCalculatedValue();
								if (substr($calculatedValue, 0, 1) != '#') {
									$objWriter->writeElement('v', $calculatedValue);
								} else {
									$objWriter->writeElement('v', '0');
								}
							} else {
								$objWriter->writeElement('v', '0');
							}
						}
						break;
					case 'n':			// Numeric
						if (PHPExcel_Shared_Date::isDateTime($pCell)) {
							$dateValue = $pCell->getValue();
							if (is_string($dateValue)) {
								//	Error string
								$objWriter->writeElement('v', $pFlippedStringTable[$dateValue]);
							} elseif (!is_float($dateValue)) {
								//	PHP serialized date/time or date/time object
								$objWriter->writeElement('v', PHPExcel_Shared_Date::PHPToExcel($dateValue));
							} else {
								//	Excel serialized date/time
								$objWriter->writeElement('v', $dateValue);
							}
						} else {
							$objWriter->writeElement('v', $pCell->getValue());
						}
						break;
					case 'b':			// Boolean
						$objWriter->writeElement('v', ($pCell->getValue() ? '1' : '0'));
						break;
				}
			}

			$objWriter->endElement();
		} else {
			throw new Exception("Invalid parameters passed.");
		}
	}

	/**
	 * Write Drawings
	 *
	 * @param	PHPExcel_Shared_XMLWriter		$objWriter		XML Writer
	 * @param	PHPExcel_Worksheet				$pSheet			Worksheet
	 * @throws	Exception
	 */
	private function _writeDrawings(PHPExcel_Shared_XMLWriter $objWriter = null, PHPExcel_Worksheet $pSheet = null)
	{
		// If sheet contains drawings, add the relationships
		if ($pSheet->getDrawingCollection()->count() > 0) {
			$objWriter->startElement('drawing');
			$objWriter->writeAttribute('r:id', 'rId1');
			$objWriter->endElement();
		}
	}

	/**
	 * Write LegacyDrawing
	 *
	 * @param	PHPExcel_Shared_XMLWriter		$objWriter		XML Writer
	 * @param	PHPExcel_Worksheet				$pSheet			Worksheet
	 * @throws	Exception
	 */
	private function _writeLegacyDrawing(PHPExcel_Shared_XMLWriter $objWriter = null, PHPExcel_Worksheet $pSheet = null)
	{
		// If sheet contains comments, add the relationships
		if (count($pSheet->getComments()) > 0) {
			$objWriter->startElement('legacyDrawing');
			$objWriter->writeAttribute('r:id', 'rId_comments_vml1');
			$objWriter->endElement();
		}
	}

	/**
	 * Write LegacyDrawingHF
	 *
	 * @param	PHPExcel_Shared_XMLWriter		$objWriter		XML Writer
	 * @param	PHPExcel_Worksheet				$pSheet			Worksheet
	 * @throws	Exception
	 */
	private function _writeLegacyDrawingHF(PHPExcel_Shared_XMLWriter $objWriter = null, PHPExcel_Worksheet $pSheet = null)
	{
		// If sheet contains comments, add the relationships
		if (count($pSheet->getHeaderFooter()->getImages()) > 0) {
			$objWriter->startElement('legacyDrawingHF');
			$objWriter->writeAttribute('r:id', 'rId_headerfooter_vml' . ($pSheet->getParent()->getIndex($pSheet) + 1));
			$objWriter->endElement();
		}
	}
}
