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<?php
namespace Box\Spout\Common\Entity\Style;
use Box\Spout\Common\Exception\InvalidColorException;
/**
* Class Color
* This class provides constants and functions to work with colors
*/
abstract class Color
{
/** Standard colors - based on Office Online */
const BLACK = '000000';
const WHITE = 'FFFFFF';
const RED = 'FF0000';
const DARK_RED = 'C00000';
const ORANGE = 'FFC000';
const YELLOW = 'FFFF00';
const LIGHT_GREEN = '92D040';
const GREEN = '00B050';
const LIGHT_BLUE = '00B0E0';
const BLUE = '0070C0';
const DARK_BLUE = '002060';
const PURPLE = '7030A0';
/**
* Returns an RGB color from R, G and B values
*
* @param int $red Red component, 0 - 255
* @param int $green Green component, 0 - 255
* @param int $blue Blue component, 0 - 255
* @return string RGB color
*/
public static function rgb($red, $green, $blue)
{
self::throwIfInvalidColorComponentValue($red);
self::throwIfInvalidColorComponentValue($green);
self::throwIfInvalidColorComponentValue($blue);
return \strtoupper(
self::convertColorComponentToHex($red) .
self::convertColorComponentToHex($green) .
self::convertColorComponentToHex($blue)
);
}
/**
* Throws an exception is the color component value is outside of bounds (0 - 255)
*
* @param int $colorComponent
* @throws \Box\Spout\Common\Exception\InvalidColorException
* @return void
*/
protected static function throwIfInvalidColorComponentValue($colorComponent)
{
if (!\is_int($colorComponent) || $colorComponent < 0 || $colorComponent > 255) {
throw new InvalidColorException("The RGB components must be between 0 and 255. Received: $colorComponent");
}
}
/**
* Converts the color component to its corresponding hexadecimal value
*
* @param int $colorComponent Color component, 0 - 255
* @return string Corresponding hexadecimal value, with a leading 0 if needed. E.g "0f", "2d"
*/
protected static function convertColorComponentToHex($colorComponent)
{
return \str_pad(\dechex($colorComponent), 2, '0', STR_PAD_LEFT);
}
/**
* Returns the ARGB color of the given RGB color,
* assuming that alpha value is always 1.
*
* @param string $rgbColor RGB color like "FF08B2"
* @return string ARGB color
*/
public static function toARGB($rgbColor)
{
return 'FF' . $rgbColor;
}
}
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