Parses hex, hsl, and rgb CSS strings using the same regex as TinyColor v1.4.2 used in the JavaScript. Only colors output from react-color are implemented.
Description
Direct port of TinyColor’s function, lightly simplified to maintain consistency with TinyColor.
Parameters
$color_str
stringrequired- CSS color string.
Source
function wp_tinycolor_string_to_rgb( $color_str ) {
_deprecated_function( __FUNCTION__, '6.3.0' );
$color_str = strtolower( trim( $color_str ) );
$css_integer = '[-\\+]?\\d+%?';
$css_number = '[-\\+]?\\d*\\.\\d+%?';
$css_unit = '(?:' . $css_number . ')|(?:' . $css_integer . ')';
$permissive_match3 = '[\\s|\\(]+(' . $css_unit . ')[,|\\s]+(' . $css_unit . ')[,|\\s]+(' . $css_unit . ')\\s*\\)?';
$permissive_match4 = '[\\s|\\(]+(' . $css_unit . ')[,|\\s]+(' . $css_unit . ')[,|\\s]+(' . $css_unit . ')[,|\\s]+(' . $css_unit . ')\\s*\\)?';
$rgb_regexp = '/^rgb' . $permissive_match3 . '$/';
if ( preg_match( $rgb_regexp, $color_str, $match ) ) {
$rgb = wp_tinycolor_rgb_to_rgb(
array(
'r' => $match[1],
'g' => $match[2],
'b' => $match[3],
)
);
$rgb['a'] = 1;
return $rgb;
}
$rgba_regexp = '/^rgba' . $permissive_match4 . '$/';
if ( preg_match( $rgba_regexp, $color_str, $match ) ) {
$rgb = wp_tinycolor_rgb_to_rgb(
array(
'r' => $match[1],
'g' => $match[2],
'b' => $match[3],
)
);
$rgb['a'] = _wp_tinycolor_bound_alpha( $match[4] );
return $rgb;
}
$hsl_regexp = '/^hsl' . $permissive_match3 . '$/';
if ( preg_match( $hsl_regexp, $color_str, $match ) ) {
$rgb = wp_tinycolor_hsl_to_rgb(
array(
'h' => $match[1],
's' => $match[2],
'l' => $match[3],
)
);
$rgb['a'] = 1;
return $rgb;
}
$hsla_regexp = '/^hsla' . $permissive_match4 . '$/';
if ( preg_match( $hsla_regexp, $color_str, $match ) ) {
$rgb = wp_tinycolor_hsl_to_rgb(
array(
'h' => $match[1],
's' => $match[2],
'l' => $match[3],
)
);
$rgb['a'] = _wp_tinycolor_bound_alpha( $match[4] );
return $rgb;
}
$hex8_regexp = '/^#?([0-9a-fA-F]{2})([0-9a-fA-F]{2})([0-9a-fA-F]{2})([0-9a-fA-F]{2})$/';
if ( preg_match( $hex8_regexp, $color_str, $match ) ) {
$rgb = wp_tinycolor_rgb_to_rgb(
array(
'r' => base_convert( $match[1], 16, 10 ),
'g' => base_convert( $match[2], 16, 10 ),
'b' => base_convert( $match[3], 16, 10 ),
)
);
$rgb['a'] = _wp_tinycolor_bound_alpha(
base_convert( $match[4], 16, 10 ) / 255
);
return $rgb;
}
$hex6_regexp = '/^#?([0-9a-fA-F]{2})([0-9a-fA-F]{2})([0-9a-fA-F]{2})$/';
if ( preg_match( $hex6_regexp, $color_str, $match ) ) {
$rgb = wp_tinycolor_rgb_to_rgb(
array(
'r' => base_convert( $match[1], 16, 10 ),
'g' => base_convert( $match[2], 16, 10 ),
'b' => base_convert( $match[3], 16, 10 ),
)
);
$rgb['a'] = 1;
return $rgb;
}
$hex4_regexp = '/^#?([0-9a-fA-F]{1})([0-9a-fA-F]{1})([0-9a-fA-F]{1})([0-9a-fA-F]{1})$/';
if ( preg_match( $hex4_regexp, $color_str, $match ) ) {
$rgb = wp_tinycolor_rgb_to_rgb(
array(
'r' => base_convert( $match[1] . $match[1], 16, 10 ),
'g' => base_convert( $match[2] . $match[2], 16, 10 ),
'b' => base_convert( $match[3] . $match[3], 16, 10 ),
)
);
$rgb['a'] = _wp_tinycolor_bound_alpha(
base_convert( $match[4] . $match[4], 16, 10 ) / 255
);
return $rgb;
}
$hex3_regexp = '/^#?([0-9a-fA-F]{1})([0-9a-fA-F]{1})([0-9a-fA-F]{1})$/';
if ( preg_match( $hex3_regexp, $color_str, $match ) ) {
$rgb = wp_tinycolor_rgb_to_rgb(
array(
'r' => base_convert( $match[1] . $match[1], 16, 10 ),
'g' => base_convert( $match[2] . $match[2], 16, 10 ),
'b' => base_convert( $match[3] . $match[3], 16, 10 ),
)
);
$rgb['a'] = 1;
return $rgb;
}
/*
* The JS color picker considers the string "transparent" to be a hex value,
* so we need to handle it here as a special case.
*/
if ( 'transparent' === $color_str ) {
return array(
'r' => 0,
'g' => 0,
'b' => 0,
'a' => 0,
);
}
}
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