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<?php defined( 'ABSPATH' ) || exit; if ( ! class_exists( 'Medizin_Color' ) ) { class Medizin_Color { /** * @param string $color Hex color. For eg: #000000 * @param mixed $opacity Alpha value. For eg: 0.5 * * @return string */ static function hex2rgba( $color, $opacity = false ) { $default = 'rgb(0,0,0)'; //Return default if no color provided. if ( empty( $color ) ) { return $default; } //Sanitize $color if "#" is provided. if ( $color[0] == '#' ) { $color = substr( $color, 1 ); } //Check if color has 6 or 3 characters and get values. if ( strlen( $color ) == 6 ) { $hex = array( $color[0] . $color[1], $color[2] . $color[3], $color[4] . $color[5] ); } elseif ( strlen( $color ) == 3 ) { $hex = array( $color[0] . $color[0], $color[1] . $color[1], $color[2] . $color[2] ); } else { return $default; } //Convert hexdec to rgb. $rgb = array_map( 'hexdec', $hex ); //Check if opacity is set(rgba or rgb). if ( $opacity ) { if ( abs( $opacity ) > 1 ) { $opacity = 1.0; } $output = 'rgba(' . implode( ",", $rgb ) . ',' . $opacity . ')'; } else { $output = 'rgb(' . implode( ",", $rgb ) . ')'; } //Return rgb(a) color string. return $output; } static function rgba2hex( $string ) { $regex = '#\((([^()]+|(?R))*)\)#'; if ( preg_match_all( $regex, $string, $matches ) ) { $rgba = explode( ',', implode( ' ', $matches[1] ) ); } else { $rgba = explode( ',', $string ); } $rr = dechex( $rgba['0'] ); $gg = dechex( $rgba['1'] ); $bb = dechex( $rgba['2'] ); return strtoupper( "#$rr$gg$bb" ); } static function get_hex( $color ) { $default = '#000'; //Return default if no color provided. if ( empty( $color ) ) { return $default; } // If is hex color then do nothing. if ( $color[0] == '#' ) { return $color; } $hex = self::rgba2hex( $color ); return $hex; } static function get_alpha( $color ) { $default = '1'; //Return default if no color provided. if ( empty( $color ) ) { return $default; } // If is hex color then do nothing. if ( $color[0] == '#' ) { return $default; } $regex = '#\((([^()]+|(?R))*)\)#'; if ( preg_match_all( $regex, $color, $matches ) ) { $rgba = explode( ',', implode( ' ', $matches[1] ) ); } else { $rgba = explode( ',', $color ); } if ( array_key_exists( '3', $rgba ) ) { return $rgba['3']; } return $default; } /** * Lightens/darkens a given colour (hex format), returning the altered colour in hex format.7 * * @param $hex string colour as hexadecimal (with or without hash); * @param $percent float $percent Decimal ( 0.2 = lighten by 20%(), -0.4 = darken by 40%() ) * * @return string Lightened/Darken colour as hexadecimal (with hash); */ static function luminance( $hex, $percent ) { // Validate hex string. $hex = preg_replace( '/[^0-9a-f]/i', '', $hex ); $new_hex = '#'; if ( strlen( $hex ) < 6 ) { $hex = $hex[0] + $hex[0] + $hex[1] + $hex[1] + $hex[2] + $hex[2]; } // Convert to decimal and change luminosity. for ( $i = 0; $i < 3; $i++ ) { $dec = hexdec( substr( $hex, $i * 2, 2 ) ); $dec = min( max( 0, $dec + $dec * $percent ), 255 ); $new_hex .= str_pad( dechex( $dec ), 2, 0, STR_PAD_LEFT ); } return $new_hex; } } }
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