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<?php |
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/** |
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* CSS caching class |
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*/ |
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namespace Crocoblock\Blocks_Style; |
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|
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class Style_Cache { |
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|
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/** |
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* Class instance |
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* |
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* @var Style_Cache |
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*/ |
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private static $instance = null; |
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|
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/** |
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* Cached styles by classes |
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* |
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* @var array |
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*/ |
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protected $generated_css = array(); |
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|
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/** |
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* List of already printed CSS classes |
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* |
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* @var array |
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*/ |
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protected $printed_css = array(); |
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|
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/** |
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* Check if the class is already printed |
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* |
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* @param string $class_name |
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* @return boolean |
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*/ |
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public function is_printed( $class_name ) { |
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|
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if ( ! is_string( $class_name ) || empty( $class_name ) ) { |
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return false; |
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} |
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|
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return in_array( $class_name, $this->printed_css, true ); |
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} |
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|
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/** |
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* Get cached or generated styles. |
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* |
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* @param Style_Engine $style_engine |
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* @return void |
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*/ |
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public function get_cached( $style_engine ) { |
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|
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if ( ! $style_engine instanceof Style_Engine ) { |
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return array(); |
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} |
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|
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$class_name = $style_engine->get_class_name(); |
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|
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if ( isset( $this->generated_css[ $class_name ] ) ) { |
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return $this->generated_css[ $class_name ]; |
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} |
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|
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$styles_data = $style_engine->get_styles(); |
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|
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if ( ! empty( $styles_data ) ) { |
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$this->generated_css[ $class_name ] = $styles_data; |
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} |
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|
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return $styles_data; |
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} |
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|
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/** |
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* Add a class to the printed CSS classes list |
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* |
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* @param string $class_name |
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*/ |
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public function add_printed( $class_name ) { |
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|
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if ( ! is_string( $class_name ) || empty( $class_name ) ) { |
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return; |
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} |
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if ( ! in_array( $class_name, $this->printed_css, true ) ) { |
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$this->printed_css[] = $class_name; |
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} |
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} |
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|
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/** |
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* Get the instance of the Style_Cache class |
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* |
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* @return Style_Cache |
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*/ |
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public static function get_instance() { |
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|
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if ( null === self::$instance ) { |
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self::$instance = new self(); |
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} |
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|
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return self::$instance; |
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} |
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} |
