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_isSupervisor = $isSupervisor;
    	// Initialise values
    	$this->_horizontal			= PHPExcel_Style_Alignment::HORIZONTAL_GENERAL;
    	$this->_vertical			= PHPExcel_Style_Alignment::VERTICAL_BOTTOM;
    	$this->_textRotation		= 0;
    	$this->_wrapText			= false;
		$this->_shrinkToFit			= false;
		$this->_indent				= 0;
    }
	/**
	 * Bind parent. Only used for supervisor
	 *
	 * @param PHPExcel $parent
	 * @return PHPExcel_Style_Alignment
	 */
	public function bindParent($parent)
	{
		$this->_parent = $parent;
		return $this;
	}
	/**
	 * Is this a supervisor or a real style component?
	 *
	 * @return boolean
	 */
	public function getIsSupervisor()
	{
		return $this->_isSupervisor;
	}
	/**
	 * Get the shared style component for the currently active cell in currently active sheet.
	 * Only used for style supervisor
	 *
	 * @return PHPExcel_Style_Alignment
	 */
	public function getSharedComponent()
	{
		return $this->_parent->getSharedComponent()->getAlignment();
	}
	/**
	 * Get the currently active sheet. Only used for supervisor
	 *
	 * @return PHPExcel_Worksheet
	 */
	public function getActiveSheet()
	{
		return $this->_parent->getActiveSheet();
	}
	/**
	 * Get the currently active cell coordinate in currently active sheet.
	 * Only used for supervisor
	 *
	 * @return string E.g. 'A1'
	 */
	public function getSelectedCells()
	{
		return $this->getActiveSheet()->getSelectedCells();
	}
	/**
	 * Get the currently active cell coordinate in currently active sheet.
	 * Only used for supervisor
	 *
	 * @return string E.g. 'A1'
	 */
	public function getActiveCell()
	{
		return $this->getActiveSheet()->getActiveCell();
	}
	/**
	 * Build style array from subcomponents
	 *
	 * @param array $array
	 * @return array
	 */
	public function getStyleArray($array)
	{
		return array('alignment' => $array);
	}
    /**
     * Apply styles from array
     *
     * 
     * $objPHPExcel->getActiveSheet()->getStyle('B2')->getAlignment()->applyFromArray(
     * 		array(
     * 			'horizontal' => PHPExcel_Style_Alignment::HORIZONTAL_CENTER,
     * 			'vertical'   => PHPExcel_Style_Alignment::VERTICAL_CENTER,
     * 			'rotation'   => 0,
     * 			'wrap'       => true
     * 		)
     * );
     * 
     *
     * @param	array	$pStyles	Array containing style information
     * @throws	Exception
     * @return PHPExcel_Style_Alignment
     */
	public function applyFromArray($pStyles = null) {
		if (is_array($pStyles)) {
			if ($this->_isSupervisor) {
				$this->getActiveSheet()->getStyle($this->getSelectedCells())->applyFromArray($this->getStyleArray($pStyles));
			} else {
				if (array_key_exists('horizontal', $pStyles)) {
					$this->setHorizontal($pStyles['horizontal']);
				}
				if (array_key_exists('vertical', $pStyles)) {
					$this->setVertical($pStyles['vertical']);
				}
				if (array_key_exists('rotation', $pStyles)) {
					$this->setTextRotation($pStyles['rotation']);
				}
				if (array_key_exists('wrap', $pStyles)) {
					$this->setWrapText($pStyles['wrap']);
				}
				if (array_key_exists('shrinkToFit', $pStyles)) {
					$this->setShrinkToFit($pStyles['shrinkToFit']);
				}
				if (array_key_exists('indent', $pStyles)) {
					$this->setIndent($pStyles['indent']);
				}
			}
		} else {
			throw new Exception("Invalid style array passed.");
		}
		return $this;
	}
    /**
     * Get Horizontal
     *
     * @return string
     */
    public function getHorizontal() {
		if ($this->_isSupervisor) {
			return $this->getSharedComponent()->getHorizontal();
		}
    	return $this->_horizontal;
    }
    /**
     * Set Horizontal
     *
     * @param string $pValue
     * @return PHPExcel_Style_Alignment
     */
    public function setHorizontal($pValue = PHPExcel_Style_Alignment::HORIZONTAL_GENERAL) {
        if ($pValue == '') {
    		$pValue = PHPExcel_Style_Alignment::HORIZONTAL_GENERAL;
    	}
		if ($this->_isSupervisor) {
			$styleArray = $this->getStyleArray(array('horizontal' => $pValue));
			$this->getActiveSheet()->getStyle($this->getSelectedCells())->applyFromArray($styleArray);
		}
		else {
			$this->_horizontal = $pValue;
		}
		return $this;
    }
    /**
     * Get Vertical
     *
     * @return string
     */
    public function getVertical() {
		if ($this->_isSupervisor) {
			return $this->getSharedComponent()->getVertical();
		}
    	return $this->_vertical;
    }
    /**
     * Set Vertical
     *
     * @param string $pValue
     * @return PHPExcel_Style_Alignment
     */
    public function setVertical($pValue = PHPExcel_Style_Alignment::VERTICAL_BOTTOM) {
    	if ($pValue == '') {
    		$pValue = PHPExcel_Style_Alignment::VERTICAL_BOTTOM;
    	}
		if ($this->_isSupervisor) {
			$styleArray = $this->getStyleArray(array('vertical' => $pValue));
			$this->getActiveSheet()->getStyle($this->getSelectedCells())->applyFromArray($styleArray);
		} else {
			$this->_vertical = $pValue;
		}
		return $this;
    }
    /**
     * Get TextRotation
     *
     * @return int
     */
    public function getTextRotation() {
		if ($this->_isSupervisor) {
			return $this->getSharedComponent()->getTextRotation();
		}
    	return $this->_textRotation;
    }
    /**
     * Set TextRotation
     *
     * @param int $pValue
     * @throws Exception
     * @return PHPExcel_Style_Alignment
     */
    public function setTextRotation($pValue = 0) {
		// Excel2007 value 255 => PHPExcel value -165
    	if ($pValue == 255) {
    		$pValue = -165;
    	}
		// Set rotation
    	if ( ($pValue >= -90 && $pValue <= 90) || $pValue == -165 ) {
			if ($this->_isSupervisor) {
				$styleArray = $this->getStyleArray(array('rotation' => $pValue));
				$this->getActiveSheet()->getStyle($this->getSelectedCells())->applyFromArray($styleArray);
			} else {
				$this->_textRotation = $pValue;
			}
    	} else {
    		throw new Exception("Text rotation should be a value between -90 and 90.");
    	}
    	return $this;
    }
    /**
     * Get Wrap Text
     *
     * @return boolean
     */
    public function getWrapText() {
		if ($this->_isSupervisor) {
			return $this->getSharedComponent()->getWrapText();
		}
    	return $this->_wrapText;
    }
    /**
     * Set Wrap Text
     *
     * @param boolean $pValue
     * @return PHPExcel_Style_Alignment
     */
    public function setWrapText($pValue = false) {
    	if ($pValue == '') {
    		$pValue = false;
    	}
		if ($this->_isSupervisor) {
			$styleArray = $this->getStyleArray(array('wrap' => $pValue));
			$this->getActiveSheet()->getStyle($this->getSelectedCells())->applyFromArray($styleArray);
		} else {
			$this->_wrapText = $pValue;
		}
		return $this;
    }
    /**
     * Get Shrink to fit
     *
     * @return boolean
     */
    public function getShrinkToFit() {
		if ($this->_isSupervisor) {
			return $this->getSharedComponent()->getShrinkToFit();
		}
    	return $this->_shrinkToFit;
    }
    /**
     * Set Shrink to fit
     *
     * @param boolean $pValue
     * @return PHPExcel_Style_Alignment
     */
    public function setShrinkToFit($pValue = false) {
    	if ($pValue == '') {
    		$pValue = false;
    	}
		if ($this->_isSupervisor) {
			$styleArray = $this->getStyleArray(array('shrinkToFit' => $pValue));
			$this->getActiveSheet()->getStyle($this->getSelectedCells())->applyFromArray($styleArray);
		} else {
			$this->_shrinkToFit = $pValue;
		}
		return $this;
    }
    /**
     * Get indent
     *
     * @return int
     */
    public function getIndent() {
		if ($this->_isSupervisor) {
			return $this->getSharedComponent()->getIndent();
		}
    	return $this->_indent;
    }
    /**
     * Set indent
     *
     * @param int $pValue
     * @return PHPExcel_Style_Alignment
     */
    public function setIndent($pValue = 0) {
		if ($pValue > 0) {
			if ($this->getHorizontal() != self::HORIZONTAL_GENERAL && $this->getHorizontal() != self::HORIZONTAL_LEFT && $this->getHorizontal() != self::HORIZONTAL_RIGHT) {
				$pValue = 0; // indent not supported
			}
		}
		if ($this->_isSupervisor) {
			$styleArray = $this->getStyleArray(array('indent' => $pValue));
			$this->getActiveSheet()->getStyle($this->getSelectedCells())->applyFromArray($styleArray);
		} else {
			$this->_indent = $pValue;
		}
		return $this;
    }
	/**
	 * Get hash code
	 *
	 * @return string	Hash code
	 */
	public function getHashCode() {
		if ($this->_isSupervisor) {
			return $this->getSharedComponent()->getHashCode();
		}
    	return md5(
    		  $this->_horizontal
    		. $this->_vertical
    		. $this->_textRotation
    		. ($this->_wrapText ? 't' : 'f')
    		. ($this->_shrinkToFit ? 't' : 'f')
			. $this->_indent
    		. __CLASS__
    	);
    }
	/**
	 * Implement PHP __clone to create a deep clone, not just a shallow copy.
	 */
	public function __clone() {
		$vars = get_object_vars($this);
		foreach ($vars as $key => $value) {
			if (is_object($value)) {
				$this->$key = clone $value;
			} else {
				$this->$key = $value;
			}
		}
	}
}