/branches/v1.6.2/Classes/PHPExcel/Style/Alignment.php

<?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_Style

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

 */





/** PHPExcel_IComparable */

require_once 'PHPExcel/IComparable.php';





/**

 * PHPExcel_Style_Alignment

 *

 * @category   PHPExcel

 * @package    PHPExcel_Style

 * @copyright  Copyright (c) 2006 - 2008 PHPExcel (http://www.codeplex.com/PHPExcel)

 */

class PHPExcel_Style_Alignment implements PHPExcel_IComparable

{	

	/* Horizontal alignment styles */

	const HORIZONTAL_GENERAL				= 'general';

	const HORIZONTAL_LEFT					= 'left';

	const HORIZONTAL_RIGHT					= 'right';

	const HORIZONTAL_CENTER					= 'center';

	const HORIZONTAL_JUSTIFY				= 'justify';

	

	/* Vertical alignment styles */

	const VERTICAL_BOTTOM					= 'bottom';

	const VERTICAL_TOP						= 'top';

	const VERTICAL_CENTER					= 'center';

	const VERTICAL_JUSTIFY					= 'justify';

	

	/**

	 * Horizontal

	 *

	 * @var string

	 */

	private $_horizontal;

	

	/**

	 * Vertical

	 *

	 * @var string

	 */

	private $_vertical;

	

	/**

	 * Text rotation

	 *

	 * @var int

	 */

	private $_textRotation;

	

	/**

	 * Wrap text

	 *

	 * @var boolean

	 */

	private $_wrapText;

	

	/**

	 * Parent Style

	 *

	 * @var PHPExcel_Style

	 */

	 

	private $_parent;

	

	/**

	 * Parent Borders

	 *

	 * @var _parentPropertyName string

	 */

	private $_parentPropertyName;

		

    /**

     * Create a new PHPExcel_Style_Alignment

     */

    public function __construct()

    {

    	// Initialise values

    	$this->_horizontal			= PHPExcel_Style_Alignment::HORIZONTAL_GENERAL;

    	$this->_vertical			= PHPExcel_Style_Alignment::VERTICAL_BOTTOM;

    	$this->_textRotation		= 0;

    	$this->_wrapText			= false;

    }



	/**

	 * Property Prepare bind

	 *

	 * Configures this object for late binding as a property of a parent object

	 *	 

	 * @param $parent

	 * @param $parentPropertyName

	 */

	public function propertyPrepareBind($parent, $parentPropertyName)

	{

		// Initialize parent PHPExcel_Style for late binding. This relationship purposely ends immediately when this object

		// is bound to the PHPExcel_Style object pointed to so as to prevent circular references.

		$this->_parent				= $parent;

		$this->_parentPropertyName	= $parentPropertyName;

	}

	

    /**

     * Property Get Bound

     *

     * Returns the PHPExcel_Style_Alignment that is actual bound to PHPExcel_Style

	 *

	 * @return PHPExcel_Style_Alignment

     */

	private function propertyGetBound() {

		if(!isset($this->_parent))

			return $this;																// I am bound



		if($this->_parent->propertyIsBound($this->_parentPropertyName))

			return $this->_parent->getAlignment();										// Another one is bound



		return $this;																	// No one is bound yet

	}

	

    /**

     * Property Begin Bind

     *

     * If no PHPExcel_Style_Alignment has been bound to PHPExcel_Style then bind this one. Return the actual bound one.

	 *

	 * @return PHPExcel_Style_Alignment

     */

	private function propertyBeginBind() {

		if(!isset($this->_parent))

			return $this;																// I am already bound



		if($this->_parent->propertyIsBound($this->_parentPropertyName))

			return $this->_parent->getAlignment();										// Another one is already bound

			

		$this->_parent->propertyCompleteBind($this, $this->_parentPropertyName);		// Bind myself

		$this->_parent = null;

		

		return $this;

	}

	

    /**

     * Apply styles from array

     * 

     * <code>

     * $objPHPExcel->getActiveSheet()->getStyle('B2')->getAlignment()->applyFromArray(

     * 		array(

     * 			'horizontal' => PHPExcel_Style_Alignment::HORIZONTAL_CENTER,

     * 			'vertical'   => PHPExcel_Style_Alignment::VERTICAL_CENTER,

     * 			'rotation'   => 0,

     * 			'wrap'       => true

     * 		)

     * );

     * </code>

     * 

     * @param	array	$pStyles	Array containing style information

     * @throws	Exception

     */

    public function applyFromArray($pStyles = null) {

        if (is_array($pStyles)) {

        	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']);

    		}

    	} else {

    		throw new Exception("Invalid style array passed.");

    	}

    }

    

    /**

     * Get Horizontal

     *

     * @return string

     */

    public function getHorizontal() {

    	return $this->propertyGetBound()->_horizontal;

    }

    

    /**

     * Set Horizontal

     *

     * @param string $pValue

     */

    public function setHorizontal($pValue = PHPExcel_Style_Alignment::HORIZONTAL_GENERAL) {

        if ($pValue == '') {

    		$pValue = PHPExcel_Style_Alignment::HORIZONTAL_GENERAL;

    	}

    	$this->propertyBeginBind()->_horizontal = $pValue;

    }

    

    /**

     * Get Vertical

     *

     * @return string

     */

    public function getVertical() {

    	return $this->propertyGetBound()->_vertical;

    }

    

    /**

     * Set Vertical

     *

     * @param string $pValue

     */

    public function setVertical($pValue = PHPExcel_Style_Alignment::VERTICAL_BOTTOM) {

    	if ($pValue == '') {

    		$pValue = PHPExcel_Style_Alignment::VERTICAL_BOTTOM;

    	}

    	$this->propertyBeginBind()->_vertical = $pValue;

    }

    

    /**

     * Get TextRotation

     *

     * @return int

     */

    public function getTextRotation() {

    	return $this->propertyGetBound()->_textRotation;

    }

    

    /**

     * Set TextRotation

     *

     * @param int $pValue

     * @throws Exception

     */

    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 ) {

    		$this->propertyBeginBind()->_textRotation = $pValue;

    	} else {

    		throw new Exception("Text rotation should be a value between -90 and 90.");

    	}

    }

    

    /**

     * Get Wrap Text

     *

     * @return boolean

     */

    public function getWrapText() {

    	return $this->propertyGetBound()->_wrapText;

    }

    

    /**

     * Set Wrap Text

     *

     * @param boolean $pValue

     */

    public function setWrapText($pValue = false) {

    	if ($pValue == '') {

    		$pValue = false;

    	}

    	$this->propertyBeginBind()->_wrapText = $pValue;

    }



	/**

	 * Get hash code

	 *

	 * @return string	Hash code

	 */	

	public function getHashCode() {

		$property = $this->propertyGetBound();

    	return md5(

    		  $property->_horizontal

    		. $property->_vertical

    		. $property->_textRotation

    		. ($property->_wrapText ? 't' : 'f')

    		. __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;

			}

		}

	}

}