<?php
declare(strict_types=1);
namespace Tomloprod\Colority\Support\Algorithms;
enum ContrastRatioScore: string
{
case Excellent = 'Excellent';
case Good = 'Good';
case Acceptable = 'Acceptable';
case Insufficient = 'Insufficient';
// @codeCoverageIgnoreStart
/**
* @param bool $largeText font size >= 14pt (18.66px) and bold || >= 18pt (24px) or larger.
*/
public static function passesTextAALevel(float $contrastRatio, bool $largeText = false): bool
{
$minimunScore = ($largeText) ? self::Acceptable->getMinimumScore() : self::Good->getMinimumScore();
return $contrastRatio >= $minimunScore;
}
/**
* @param bool $largeText font size >= 14pt (18.66px) and bold || >= 18pt (24px) or larger.
*/
public static function passesTextAAALevel(float $contrastRatio, bool $largeText = false): bool
{
$minimunScore = ($largeText) ? self::Good->getMinimumScore() : self::Excellent->getMinimumScore();
return $contrastRatio >= $minimunScore;
}
/**
* Used for Graphical Objects and User Interface Components (input texts, icons, ...)
*/
public static function passesUIAALevel(float $contrastRatio): bool
{
return $contrastRatio >= self::Acceptable->getMinimumScore();
}
public function getMinimumScore(): float
{
return match ($this) {
// greater or equal than 7
ContrastRatioScore::Excellent => 7,
// greater or equal than 4.5
ContrastRatioScore::Good => 4.5,
// greater or equal than 3
ContrastRatioScore::Acceptable => 3,
// less than 3
ContrastRatioScore::Insufficient => 0,
};
}
// @codeCoverageIgnoreEnd
}
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