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<?php
/**
* Handles working with CSS variables.
*
* @since 2.9
*/
final class FLBuilderCSSVars {
/**
* An array of registered CSS vars to output.
*
* @since 2.9
* @var array $registry
*/
static private $registry = [];
/**
* Initialize hooks.
*
* @since 2.9
* @return void
*/
static public function init() {
add_action( 'wp_head', __CLASS__ . '::render' );
}
/**
* Render CSS vars into the head tag.
*
* @since 2.9
* @return void
*/
static public function render() {
$output = '';
if ( empty( self::$registry ) ) {
return;
}
foreach ( self::$registry as $key => $value ) {
$output .= "\t$key: $value;\n";
}
echo "<style>\n:root {\n{$output}}\n</style>";
}
/**
* Add a CSS var to the registry.
*
* @since 2.9
* @param string $key
* @param string $value
* @return void
*/
static public function register( $key, $value ) {
if ( ! isset( self::$registry[ $key ] ) ) {
self::$registry[ $key ] = $value;
}
}
}
FLBuilderCSSVars::init();