/branches/v1.3.5/Classes/PHPExcel/Cell.php

<?php

/**

 * PHPExcel

 *

 * Copyright (c) 2006 - 2007 PHPExcel, Maarten Balliauw

 *

 * 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

 * @copyright  Copyright (c) 2006 - 2007 PHPExcel (http://www.codeplex.com/PHPExcel)

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

 * @version    ##VERSION##, ##DATE##

 */





/** PHPExcel_Cell_DataType */

require_once 'PHPExcel/Cell/DataType.php';



/** PHPExcel_Cell_DataValidation */

require_once 'PHPExcel/Cell/DataValidation.php';



/** PHPExcel_Worksheet */

require_once 'PHPExcel/Worksheet.php';



/** PHPExcel_Calculation */

require_once 'PHPExcel/Calculation.php';





/**

 * PHPExcel_Cell

 *

 * @category   PHPExcel

 * @package    PHPExcel

 * @copyright  Copyright (c) 2006 - 2007 PHPExcel (http://www.codeplex.com/PHPExcel)

 */

class PHPExcel_Cell

{

	/**

	 * Column of the cell

	 *

	 * @var string

	 */

	private $_column;

	

	/**

	 * Row of the cell

	 *

	 * @var int

	 */

	private $_row;

	

	/**

	 * Value of the cell

	 *

	 * @var mixed

	 */

	private $_value;

	

	/**

	 * Type of the cell data

	 *

	 * @var string

	 */

	private $_dataType;

	

	/**

	 * Data validation

	 *

	 * @var PHPExcel_Cell_DataValidation

	 */

	private $_dataValidation;

	

	/**

	 * Parent worksheet

	 *

	 * @var PHPExcel_Worksheet

	 */

	private $_parent;

	   

    /**

     * Create a new Cell

     *

     * @param 	string 				$pColumn

     * @param 	int 				$pRow

     * @param 	mixed 				$pValue

     * @param 	string 				$pDataType

     * @param 	PHPExcel_Worksheet	$pSheet

     * @throws	Exception

     */

    public function __construct($pColumn = 'A', $pRow = 1, $pValue = null, $pDataType = null, $pSheet = null)

    {

    	// Initialise cell coordinate

    	$this->_column = strtoupper($pColumn);

    	$this->_row = $pRow;

    	

    	// Initialise cell value

    	$this->_value = $pValue;

    	

    	// Set datatype?

    	if (!is_null($pDataType)) {

    		$this->_dataType = $pDataType;

    	}

 	

    	// Set worksheet?

    	if ($pSheet instanceof PHPExcel_Worksheet) {

    		$this->_parent = $pSheet;

    	} else {

    		throw new Exception("Invalid parent worksheet passed.");

    	}

    }

    

    /**

     * Get cell coordinate column

     *

     * @return string

     */

    public function getColumn()

    {

    	return strtoupper($this->_column);

    }

    

    /**

     * Get cell coordinate row

     *

     * @return int

     */

    public function getRow()

    {

    	return $this->_row;

    }

    

    /**

     * Get cell coordinate

     *

     * @return string

     */

    public function getCoordinate()

    {

    	return $this->getColumn() . $this->getRow();

    }

    

    /**

     * Get cell value

     *

     * @return mixed

     */

    public function getValue()

    {

    	return $this->_value;

    }

    

    /**

     * Set cell value

     *

     * This clears the cell formula.

     *

     * @param mixed $pValue

     * @param bool 	$pUpdateDataType

     */

    public function setValue($pValue = null, $pUpdateDataType = true)

    {

    	$this->_value = $pValue;

    	

    	if ($pUpdateDataType) {

    		$this->_dataType = PHPExcel_Cell_DataType::dataTypeForValue($pValue);

    	}

    }

    

    /**

     * Get caluclated cell value

     *

     * @return mixed

     */

    public function getCalculatedValue()

    {

    	if ($this->_dataType != PHPExcel_Cell_DataType::TYPE_FORMULA) {

    		return $this->_value;

    	} else {

    		return PHPExcel_Calculation::getInstance()->calculate($this);

    	}

    }

    

    /**

     * Get cell data type

     *

     * @return string

     */

    public function getDataType()

    {

    	return $this->_dataType;

    }

    

    /**

     * Set cell data type

     *

     * @param string $pDataType

     */

    public function setDataType($pDataType = PHPExcel_Cell_DataType::TYPE_STRING)

    {

    	$this->_dataType = $pDataType;

    }

    

    /**

     * Has Data validation?

     *

     * @return boolean

     */

    public function hasDataValidation()

    {

    	return !is_null($this->_dataValidation);

    }

    

    /**

     * Get Data validation

     *

     * @return PHPExcel_Cell_DataValidation

     */

    public function getDataValidation()

    {

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

    		$this->_dataValidation = new PHPExcel_Cell_DataValidation($this);

    	}

    	

    	return $this->_dataValidation;

    }

    

    /**

     * Set Data validation

     *

     * @param 	PHPExcel_Cell_DataValidation	$pDataValidation

     * @throws 	Exception

     */

    public function setDataValidation($pDataValidation = null)

    {

    	if ($pDataValidation instanceof PHPExcel_Cell_DataValidation) {

    		$this->_dataValidation = $pDataValidation;

    		$this->_dataValidation->setParent($this);

    	} else {

    		throw new Exception("Invalid PHPExcel_Cell_DataValidation object passed.");

    	}

    }

    

    /**

     * Get parent

     *

     * @return PHPExcel_Worksheet

     */

    public function getParent() {

    	return $this->_parent;

    }

    

    /**

     * Coordinate from string

     *

     * @param 	string 	$pCoordinateString

     * @return 	array 	Array containing column and row (indexes 0 and 1)

     * @throws	Exception

     */

    public static function coordinateFromString($pCoordinateString = 'A1')

    {

    	if (eregi(':', $pCoordinateString)) {

    		throw new Exception('Cell coordinate string can not be a range of cells.');

    	} else if (eregi('\$', $pCoordinateString)) {

    		throw new Exception('Cell coordinate string must not be absolute.');

    	} else if ($pCoordinateString == '') {

    		throw new Exception('Cell coordinate can not be zero-length string.');

    	} else {

	    	// Column

	    	$column = '';

	    	

	    	// Row

	    	$row = '';

	    	

	    	// Calculate column

	    	for ($i = 0; $i < strlen($pCoordinateString); $i++) {

		    	if (!is_numeric(substr($pCoordinateString, $i, 1))) {

		    		$column .= strtoupper(substr($pCoordinateString, $i, 1));

		    	} else {

		    		$row = substr($pCoordinateString, $i);

		    		break;

		    	}

	    	}

	    	

	    	// Return array

	    	return array($column, $row);

    	}

    }

    

    /**

     * Make string coordinate absolute

     *

     * @param 	string 	$pCoordinateString

     * @return 	string	Absolute coordinate

     * @throws	Exception

     */

    public static function absoluteCoordinate($pCoordinateString = 'A1')

    {

    	if (!eregi(':', $pCoordinateString)) {

	    	// Return value

	    	$returnValue = '';

	    	

	    	// Create absolute coordinate

	    	list($column, $row) = PHPExcel_Cell::coordinateFromString($pCoordinateString);

	    	$returnValue = '$' . $column . '$' . $row;

	    	

	    	// Return

	    	return $returnValue;

    	} else {

    		throw new Exception("Coordinate string should not be a cell range.");

    	}

    }

    

    /**

     * Split range into coordinate strings

     *

     * @param 	string 	$pRange

     * @return 	array	Array containg two coordinate strings

     */

    public static function splitRange($pRange = 'A1:A1')

    {

    	return explode(':', $pRange);

    }

    

    /**

     * Columnindex from string

     *

     * @param 	string $pString

     * @return 	int Column index (base 1 !!!)

     * @throws 	Exception

     */

    public static function columnIndexFromString($pString = 'A')

    {

    	// Convert to uppercase

    	$pString = strtoupper($pString);

    	

    	// Convert column to integer

    	if (strlen($pString) == 1) {

    		$result = 0;

    		$result += (ord(substr($pString, 0, 1)) - 65);

    		$result += 1;

    		

    		return $result;

    	} else if (strlen($pString) == 2) {

    		$result = 0;

    		$result += ( (1 + (ord(substr($pString, 0, 1)) - 65) )    * 26);

    		$result += (ord(substr($pString, 1, 2)) - 65);

    		$result += 1;

    		

    		return $result;

    	} else {

    		throw new Exception("Column string index can not be longer than 2 characters.");

    	}

    }

    

    /**

     * String from columnindex 

     *

     * @param int $pColumnIndex Column index (base 0 !!!)

     * @return string

     */

    public static function stringFromColumnIndex($pColumnIndex = 0)

    {

        // Convert column to string

        $returnValue = '';

        // Determine column string

        if ($pColumnIndex < 26) {

        	$returnValue = chr(65 + $pColumnIndex);

        } else {

        	

        	$iRemainder = (int)($pColumnIndex / 26) -1;

        	$returnValue = PHPExcel_Cell::stringFromColumnIndex( $iRemainder  ).chr(65 + $pColumnIndex%26) ;

        }

        // Return

        return $returnValue;

    }

    

	/**

	 * Compare 2 cells

	 *

	 * @param 	PHPExcel_Cell	$a	Cell a

	 * @param 	PHPExcel_Cell	$a	Cell b

	 * @return 	int		Result of comparison (always -1 or 1, never zero!)

	 */

	public static function compareCells($a, $b)

	{

		if ($a->getRow() < $b->getRow()) {

			return -1;

		} elseif ($a->getRow() > $b->getRow()) {

			return 1;

		} elseif (PHPExcel_Cell::columnIndexFromString($a->getColumn()) < PHPExcel_Cell::columnIndexFromString($b->getColumn())) {

			return -1;

		} else {

			return 1;

		}

	}

	    

	/**

	 * 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;

			}

		}

	}

}