/Classes/PHPExcel/Style/Color.php

<?php
/**
 * PHPExcel
 *
 * Copyright (c) 2006 - 2012 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 - 2012 PHPExcel (http://www.codeplex.com/PHPExcel)
 * @license http://www.gnu.org/licenses/old-licenses/lgpl-2.1.txt	LGPL
 * @version ##VERSION##, ##DATE##
 */


/**
 * PHPExcel_Style_Color
 *
 * @category   PHPExcel
 * @package	PHPExcel_Style
 * @copyright  Copyright (c) 2006 - 2012 PHPExcel (http://www.codeplex.com/PHPExcel)
 */
class PHPExcel_Style_Color extends PHPExcel_Style_Supervisor implements PHPExcel_IComparable
{
	/* Colors */
	const COLOR_BLACK						= 'FF000000';
	const COLOR_WHITE						= 'FFFFFFFF';
	const COLOR_RED							= 'FFFF0000';
	const COLOR_DARKRED						= 'FF800000';
	const COLOR_BLUE						= 'FF0000FF';
	const COLOR_DARKBLUE					= 'FF000080';
	const COLOR_GREEN						= 'FF00FF00';
	const COLOR_DARKGREEN					= 'FF008000';
	const COLOR_YELLOW						= 'FFFFFF00';
	const COLOR_DARKYELLOW					= 'FF808000';

	/**
	 * Indexed colors array
	 *
	 * @var array
	 */
	protected static $_indexedColors;

	/**
	 * ARGB - Alpha RGB
	 *
	 * @var string
	 */
	protected $_argb	= NULL;

	/**
	 * Parent property name
	 *
	 * @var string
	 */
	protected $_parentPropertyName;


	/**
	 * Create a new PHPExcel_Style_Color
	 *
	 * @param	string	$pARGB			ARGB value for the colour
	 * @param	boolean	$isSupervisor	Flag indicating if this is a supervisor or not
	 *									Leave this value at default unless you understand exactly what
	 *										its ramifications are
	 * @param	boolean	$isConditional	Flag indicating if this is a conditional style or not
	 *									Leave this value at default unless you understand exactly what
	 *										its ramifications are
	 */
	public function __construct($pARGB = PHPExcel_Style_Color::COLOR_BLACK, $isSupervisor = FALSE, $isConditional = FALSE)
	{
		//	Supervisor?
		parent::__construct($isSupervisor);

		//	Initialise values
		if (!$isConditional) {
			$this->_argb = $pARGB;
		}
	}

	/**
	 * Bind parent. Only used for supervisor
	 *
	 * @param mixed $parent
	 * @param string $parentPropertyName
	 * @return PHPExcel_Style_Color
	 */
	public function bindParent($parent, $parentPropertyName=NULL)
	{
		$this->_parent = $parent;
		$this->_parentPropertyName = $parentPropertyName;
		return $this;
	}

	/**
	 * Get the shared style component for the currently active cell in currently active sheet.
	 * Only used for style supervisor
	 *
	 * @return PHPExcel_Style_Color
	 */
	public function getSharedComponent()
	{
		switch ($this->_parentPropertyName) {
			case '_endColor':
				return $this->_parent->getSharedComponent()->getEndColor();		break;
			case '_color':
				return $this->_parent->getSharedComponent()->getColor();		break;
			case '_startColor':
				return $this->_parent->getSharedComponent()->getStartColor();	break;
		}
	}

	/**
	 * Build style array from subcomponents
	 *
	 * @param array $array
	 * @return array
	 */
	public function getStyleArray($array)
	{
		switch ($this->_parentPropertyName) {
			case '_endColor':
				$key = 'endcolor';
				break;
			case '_color':
				$key = 'color';
				break;
			case '_startColor':
				$key = 'startcolor';
				break;

		}
		return $this->_parent->getStyleArray(array($key => $array));
	}

	/**
	 * Apply styles from array
	 *
	 * <code>
	 * $objPHPExcel->getActiveSheet()->getStyle('B2')->getFont()->getColor()->applyFromArray( array('rgb' => '808080') );
	 * </code>
	 *
	 * @param	array	$pStyles	Array containing style information
	 * @throws	PHPExcel_Exception
	 * @return PHPExcel_Style_Color
	 */
	public function applyFromArray($pStyles = NULL) {
		if (is_array($pStyles)) {
			if ($this->_isSupervisor) {
				$this->getActiveSheet()->getStyle($this->getSelectedCells())->applyFromArray($this->getStyleArray($pStyles));
			} else {
				if (array_key_exists('rgb', $pStyles)) {
					$this->setRGB($pStyles['rgb']);
				}
				if (array_key_exists('argb', $pStyles)) {
					$this->setARGB($pStyles['argb']);
				}
			}
		} else {
			throw new PHPExcel_Exception("Invalid style array passed.");
		}
		return $this;
	}

	/**
	 * Get ARGB
	 *
	 * @return string
	 */
	public function getARGB() {
		if ($this->_isSupervisor) {
			return $this->getSharedComponent()->getARGB();
		}
		return $this->_argb;
	}

	/**
	 * Set ARGB
	 *
	 * @param string $pValue
	 * @return PHPExcel_Style_Color
	 */
	public function setARGB($pValue = PHPExcel_Style_Color::COLOR_BLACK) {
		if ($pValue == '') {
			$pValue = PHPExcel_Style_Color::COLOR_BLACK;
		}
		if ($this->_isSupervisor) {
			$styleArray = $this->getStyleArray(array('argb' => $pValue));
			$this->getActiveSheet()->getStyle($this->getSelectedCells())->applyFromArray($styleArray);
		} else {
			$this->_argb = $pValue;
		}
		return $this;
	}

	/**
	 * Get RGB
	 *
	 * @return string
	 */
	public function getRGB() {
		if ($this->_isSupervisor) {
			return $this->getSharedComponent()->getRGB();
		}
		return substr($this->_argb, 2);
	}

	/**
	 * Set RGB
	 *
	 * @param	string	$pValue	RGB value
	 * @return PHPExcel_Style_Color
	 */
	public function setRGB($pValue = '000000') {
		if ($pValue == '') {
			$pValue = '000000';
		}
		if ($this->_isSupervisor) {
			$styleArray = $this->getStyleArray(array('argb' => 'FF' . $pValue));
			$this->getActiveSheet()->getStyle($this->getSelectedCells())->applyFromArray($styleArray);
		} else {
			$this->_argb = 'FF' . $pValue;
		}
		return $this;
	}

	/**
	 * Get a specified colour component of an RGB value
	 *
	 * @private
	 * @param	string		$RGB		The colour as an RGB value (e.g. FF00CCCC or CCDDEE
	 * @param	int			$offset		Position within the RGB value to extract
	 * @param	boolean		$hex		Flag indicating whether the component should be returned as a hex or a
	 *									decimal value
	 * @return	string		The extracted colour component
	 */
	private static function _getColourComponent($RGB,$offset,$hex=TRUE) {
		$colour = substr($RGB, $offset, 2);
		if (!$hex)
			$colour = hexdec($colour);
		return $colour;
	}

	/**
	 * Get the red colour component of an RGB value
	 *
	 * @param	string		$RGB		The colour as an RGB value (e.g. FF00CCCC or CCDDEE
	 * @param	boolean		$hex		Flag indicating whether the component should be returned as a hex or a
	 *									decimal value
	 * @return	string		The red colour component
	 */
	public static function getRed($RGB,$hex=TRUE) {
		if (strlen($RGB) == 8) {
			return self::_getColourComponent($RGB, 2, $hex);
		} elseif (strlen($RGB) == 6) {
			return self::_getColourComponent($RGB, 0, $hex);
		}
	}

	/**
	 * Get the green colour component of an RGB value
	 *
	 * @param	string		$RGB		The colour as an RGB value (e.g. FF00CCCC or CCDDEE
	 * @param	boolean		$hex		Flag indicating whether the component should be returned as a hex or a
	 *									decimal value
	 * @return	string		The green colour component
	 */
	public static function getGreen($RGB,$hex=TRUE) {
		if (strlen($RGB) == 8) {
			return self::_getColourComponent($RGB, 4, $hex);
		} elseif (strlen($RGB) == 6) {
			return self::_getColourComponent($RGB, 2, $hex);
		}
	}

	/**
	 * Get the blue colour component of an RGB value
	 *
	 * @param	string		$RGB		The colour as an RGB value (e.g. FF00CCCC or CCDDEE
	 * @param	boolean		$hex		Flag indicating whether the component should be returned as a hex or a
	 *									decimal value
	 * @return	string		The blue colour component
	 */
	public static function getBlue($RGB,$hex=TRUE) {
		if (strlen($RGB) == 8) {
			return self::_getColourComponent($RGB, 6, $hex);
		} elseif (strlen($RGB) == 6) {
			return self::_getColourComponent($RGB, 4, $hex);
		}
	}

	/**
	 * Adjust the brightness of a color
	 *
	 * @param	string		$hex	The colour as an RGBA or RGB value (e.g. FF00CCCC or CCDDEE)
	 * @param	float		$adjustPercentage	The percentage by which to adjust the colour as a float from -1 to 1
	 * @return	string		The adjusted colour as an RGBA or RGB value (e.g. FF00CCCC or CCDDEE)
	 */
	public static function changeBrightness($hex, $adjustPercentage) {
		$rgba = (strlen($hex) == 8);

		$red	= self::getRed($hex, FALSE);
		$green	= self::getGreen($hex, FALSE);
		$blue	= self::getBlue($hex, FALSE);
		if ($adjustPercentage > 0) {
			$red	+= (255 - $red) * $adjustPercentage;
			$green	+= (255 - $green) * $adjustPercentage;
			$blue	+= (255 - $blue) * $adjustPercentage;
		} else {
			$red	+= $red * $adjustPercentage;
			$green	+= $green * $adjustPercentage;
			$blue	+= $blue * $adjustPercentage;
		}

		if ($red < 0) $red = 0;
		elseif ($red > 255) $red = 255;
		if ($green < 0) $green = 0;
		elseif ($green > 255) $green = 255;
		if ($blue < 0) $blue = 0;
		elseif ($blue > 255) $blue = 255;

		$rgb = strtoupper(	str_pad(dechex($red), 2, '0', 0) .
							str_pad(dechex($green), 2, '0', 0) .
							str_pad(dechex($blue), 2, '0', 0)
						 );
		return (($rgba) ? 'FF' : '') . $rgb;
	}

	/**
	 * Get indexed color
	 *
	 * @param	int			$pIndex			Index entry point into the colour array
	 * @param	boolean		$background		Flag to indicate whether default background or foreground colour
	 *											should be returned if the indexed colour doesn't exist
	 * @return	PHPExcel_Style_Color
	 */
	public static function indexedColor($pIndex, $background=FALSE) {
		// Clean parameter
		$pIndex = intval($pIndex);

		// Indexed colors
		if (is_null(self::$_indexedColors)) {
			self::$_indexedColors = array(
					1	=> 'FF000000',	//	System Colour #1 - Black
					2	=> 'FFFFFFFF',	//	System Colour #2 - White
					3	=> 'FFFF0000',	//	System Colour #3 - Red
					4	=> 'FF00FF00',	//	System Colour #4 - Green
					5	=> 'FF0000FF',	//	System Colour #5 - Blue
					6	=> 'FFFFFF00',	//	System Colour #6 - Yellow
					7	=> 'FFFF00FF',	//	System Colour #7- Magenta
					8	=> 'FF00FFFF',	//	System Colour #8- Cyan
					9	=> 'FF800000',	//	Standard Colour #9
					10	=> 'FF008000',	//	Standard Colour #10
					11	=> 'FF000080',	//	Standard Colour #11
					12	=> 'FF808000',	//	Standard Colour #12
					13	=> 'FF800080',	//	Standard Colour #13
					14	=> 'FF008080',	//	Standard Colour #14
					15	=> 'FFC0C0C0',	//	Standard Colour #15
					16	=> 'FF808080',	//	Standard Colour #16
					17	=> 'FF9999FF',	//	Chart Fill Colour #17
					18	=> 'FF993366',	//	Chart Fill Colour #18
					19	=> 'FFFFFFCC',	//	Chart Fill Colour #19
					20	=> 'FFCCFFFF',	//	Chart Fill Colour #20
					21	=> 'FF660066',	//	Chart Fill Colour #21
					22	=> 'FFFF8080',	//	Chart Fill Colour #22
					23	=> 'FF0066CC',	//	Chart Fill Colour #23
					24	=> 'FFCCCCFF',	//	Chart Fill Colour #24
					25	=> 'FF000080',	//	Chart Line Colour #25
					26	=> 'FFFF00FF',	//	Chart Line Colour #26
					27	=> 'FFFFFF00',	//	Chart Line Colour #27
					28	=> 'FF00FFFF',	//	Chart Line Colour #28
					29	=> 'FF800080',	//	Chart Line Colour #29
					30	=> 'FF800000',	//	Chart Line Colour #30
					31	=> 'FF008080',	//	Chart Line Colour #31
					32	=> 'FF0000FF',	//	Chart Line Colour #32
					33	=> 'FF00CCFF',	//	Standard Colour #33
					34	=> 'FFCCFFFF',	//	Standard Colour #34
					35	=> 'FFCCFFCC',	//	Standard Colour #35
					36	=> 'FFFFFF99',	//	Standard Colour #36
					37	=> 'FF99CCFF',	//	Standard Colour #37
					38	=> 'FFFF99CC',	//	Standard Colour #38
					39	=> 'FFCC99FF',	//	Standard Colour #39
					40	=> 'FFFFCC99',	//	Standard Colour #40
					41	=> 'FF3366FF',	//	Standard Colour #41
					42	=> 'FF33CCCC',	//	Standard Colour #42
					43	=> 'FF99CC00',	//	Standard Colour #43
					44	=> 'FFFFCC00',	//	Standard Colour #44
					45	=> 'FFFF9900',	//	Standard Colour #45
					46	=> 'FFFF6600',	//	Standard Colour #46
					47	=> 'FF666699',	//	Standard Colour #47
					48	=> 'FF969696',	//	Standard Colour #48
					49	=> 'FF003366',	//	Standard Colour #49
					50	=> 'FF339966',	//	Standard Colour #50
					51	=> 'FF003300',	//	Standard Colour #51
					52	=> 'FF333300',	//	Standard Colour #52
					53	=> 'FF993300',	//	Standard Colour #53
					54	=> 'FF993366',	//	Standard Colour #54
					55	=> 'FF333399',	//	Standard Colour #55
					56	=> 'FF333333'	//	Standard Colour #56
				);
		}

		if (array_key_exists($pIndex, self::$_indexedColors)) {
			return new PHPExcel_Style_Color(self::$_indexedColors[$pIndex]);
		}

		if ($background) {
			return new PHPExcel_Style_Color('FFFFFFFF');
		}
		return new PHPExcel_Style_Color('FF000000');
	}

	/**
	 * Get hash code
	 *
	 * @return string	Hash code
	 */
	public function getHashCode() {
		if ($this->_isSupervisor) {
			return $this->getSharedComponent()->getHashCode();
		}
		return md5(
			  $this->_argb
			. __CLASS__
		);
	}

}