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Edit File: CssColorValidator.php

<?php
namespace MailPoetVendor\Symfony\Component\Validator\Constraints;
if (!defined('ABSPATH')) exit;
use MailPoetVendor\Symfony\Component\Validator\Constraint;
use MailPoetVendor\Symfony\Component\Validator\ConstraintValidator;
use MailPoetVendor\Symfony\Component\Validator\Exception\UnexpectedTypeException;
use MailPoetVendor\Symfony\Component\Validator\Exception\UnexpectedValueException;
class CssColorValidator extends ConstraintValidator
{
 private const PATTERN_HEX_LONG = '/^#[0-9a-f]{6}$/iD';
 private const PATTERN_HEX_LONG_WITH_ALPHA = '/^#[0-9a-f]{8}$/iD';
 private const PATTERN_HEX_SHORT = '/^#[0-9a-f]{3}$/iD';
 private const PATTERN_HEX_SHORT_WITH_ALPHA = '/^#[0-9a-f]{4}$/iD';
 // List comes from https://www.w3.org/wiki/CSS/Properties/color/keywords#Basic_Colors
 private const PATTERN_BASIC_NAMED_COLORS = '/^(black|silver|gray|white|maroon|red|purple|fuchsia|green|lime|olive|yellow|navy|blue|teal|aqua)$/iD';
 // List comes from https://www.w3.org/wiki/CSS/Properties/color/keywords#Extended_colors
 private const PATTERN_EXTENDED_NAMED_COLORS = '/^(aliceblue|antiquewhite|aqua|aquamarine|azure|beige|bisque|black|blanchedalmond|blue|blueviolet|brown|burlywood|cadetblue|chartreuse|chocolate|coral|cornflowerblue|cornsilk|crimson|cyan|darkblue|darkcyan|darkgoldenrod|darkgray|darkgreen|darkgrey|darkkhaki|darkmagenta|darkolivegreen|darkorange|darkorchid|darkred|darksalmon|darkseagreen|darkslateblue|darkslategray|darkslategrey|darkturquoise|darkviolet|deeppink|deepskyblue|dimgray|dimgrey|dodgerblue|firebrick|floralwhite|forestgreen|fuchsia|gainsboro|ghostwhite|gold|goldenrod|gray|green|greenyellow|grey|honeydew|hotpink|indianred|indigo|ivory|khaki|lavender|lavenderblush|lawngreen|lemonchiffon|lightblue|lightcoral|lightcyan|lightgoldenrodyellow|lightgray|lightgreen|lightgrey|lightpink|lightsalmon|lightseagreen|lightskyblue|lightslategray|lightslategrey|lightsteelblue|lightyellow|lime|limegreen|linen|magenta|maroon|mediumaquamarine|mediumblue|mediumorchid|mediumpurple|mediumseagreen|mediumslateblue|mediumspringgreen|mediumturquoise|mediumvioletred|midnightblue|mintcream|mistyrose|moccasin|navajowhite|navy|oldlace|olive|olivedrab|orange|orangered|orchid|palegoldenrod|palegreen|paleturquoise|palevioletred|papayawhip|peachpuff|peru|pink|plum|powderblue|purple|red|rosybrown|royalblue|saddlebrown|salmon|sandybrown|seagreen|seashell|sienna|silver|skyblue|slateblue|slategray|slategrey|snow|springgreen|steelblue|tan|teal|thistle|tomato|turquoise|violet|wheat|white|whitesmoke|yellow|yellowgreen)$/iD';
 // List comes from https://drafts.csswg.org/css-color/#css-system-colors
 private const PATTERN_SYSTEM_COLORS = '/^(Canvas|CanvasText|LinkText|VisitedText|ActiveText|ButtonFace|ButtonText|ButtonBorder|Field|FieldText|Highlight|HighlightText|SelectedItem|SelectedItemText|Mark|MarkText|GrayText)$/iD';
 private const PATTERN_KEYWORDS = '/^(transparent|currentColor)$/iD';
 private const PATTERN_RGB = '/^rgb\$\\s*(0|255|25[0-4]|2[0-4]\\d|1\\d\\d|0?\\d?\\d),\\s*(0|255|25[0-4]|2[0-4]\\d|1\\d\\d|0?\\d?\\d),\\s*(0|255|25[0-4]|2[0-4]\\d|1\\d\\d|0?\\d?\\d)\\s*\$$/iD';
 private const PATTERN_RGBA = '/^rgba\$\\s*(0|255|25[0-4]|2[0-4]\\d|1\\d\\d|0?\\d?\\d),\\s*(0|255|25[0-4]|2[0-4]\\d|1\\d\\d|0?\\d?\\d),\\s*(0|255|25[0-4]|2[0-4]\\d|1\\d\\d|0?\\d?\\d),\\s*(0|0?\\.\\d+|1(\\.0)?)\\s*\$$/iD';
 private const PATTERN_HSL = '/^hsl\$\\s*(0|360|35\\d|3[0-4]\\d|[12]\\d\\d|0?\\d?\\d),\\s*(0|100|\\d{1,2})%,\\s*(0|100|\\d{1,2})%\\s*\$$/iD';
 private const PATTERN_HSLA = '/^hsla\$\\s*(0|360|35\\d|3[0-4]\\d|[12]\\d\\d|0?\\d?\\d),\\s*(0|100|\\d{1,2})%,\\s*(0|100|\\d{1,2})%,\\s*(0|0?\\.\\d+|1(\\.0)?)\\s*\$$/iD';
 private const COLOR_PATTERNS = [CssColor::HEX_LONG => self::PATTERN_HEX_LONG, CssColor::HEX_LONG_WITH_ALPHA => self::PATTERN_HEX_LONG_WITH_ALPHA, CssColor::HEX_SHORT => self::PATTERN_HEX_SHORT, CssColor::HEX_SHORT_WITH_ALPHA => self::PATTERN_HEX_SHORT_WITH_ALPHA, CssColor::BASIC_NAMED_COLORS => self::PATTERN_BASIC_NAMED_COLORS, CssColor::EXTENDED_NAMED_COLORS => self::PATTERN_EXTENDED_NAMED_COLORS, CssColor::SYSTEM_COLORS => self::PATTERN_SYSTEM_COLORS, CssColor::KEYWORDS => self::PATTERN_KEYWORDS, CssColor::RGB => self::PATTERN_RGB, CssColor::RGBA => self::PATTERN_RGBA, CssColor::HSL => self::PATTERN_HSL, CssColor::HSLA => self::PATTERN_HSLA];
 public function validate($value, Constraint $constraint) : void
 {
 if (!$constraint instanceof CssColor) {
 throw new UnexpectedTypeException($constraint, CssColor::class);
 }
 if (null === $value || '' === $value) {
 return;
 }
 if (!\is_string($value)) {
 throw new UnexpectedValueException($value, 'string');
 }
 $formats = \array_flip((array) $constraint->formats);
 $formatRegexes = \array_intersect_key(self::COLOR_PATTERNS, $formats);
 foreach ($formatRegexes as $regex) {
 if (\preg_match($regex, (string) $value)) {
 return;
 }
 }
 $this->context->buildViolation($constraint->message)->setParameter('{{ value }}', $this->formatValue($value))->setCode(CssColor::INVALID_FORMAT_ERROR)->addViolation();
 }
}

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