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<?php
/**
* Style Engine: WP_Style_Engine_CSS_Rule class
*
* @package WordPress
* @subpackage StyleEngine
* @since 6.1.0
*/
/**
* Core class used for style engine CSS rules.
*
* Holds, sanitizes, processes, and prints CSS declarations for the style engine.
*
* @since 6.1.0
*/
#[AllowDynamicProperties]
class WP_Style_Engine_CSS_Rule {
/**
* The selector.
*
* @since 6.1.0
* @var string
*/
protected $selector;
/**
* The selector declarations.
*
* Contains a WP_Style_Engine_CSS_Declarations object.
*
* @since 6.1.0
* @var WP_Style_Engine_CSS_Declarations
*/
protected $declarations;
/**
* A parent CSS selector in the case of nested CSS, or a CSS nested @rule,
* such as `@media (min-width: 80rem)` or `@layer module`.
*
* @since 6.6.0
* @var string
*/
protected $rules_group;
/**
* Constructor.
*
* @since 6.1.0
* @since 6.6.0 Added the `$rules_group` parameter.
*
* @param string $selector Optional. The CSS selector. Default empty string.
* @param string[]|WP_Style_Engine_CSS_Declarations $declarations Optional. An associative array of CSS definitions,
* e.g. `array( "$property" => "$value", "$property" => "$value" )`,
* or a WP_Style_Engine_CSS_Declarations object.
* Default empty array.
* @param string $rules_group A parent CSS selector in the case of nested CSS, or a CSS nested @rule,
* such as `@media (min-width: 80rem)` or `@layer module`.
*/
public function __construct( $selector = '', $declarations = array(), $rules_group = '' ) {
$this->set_selector( $selector );
$this->add_declarations( $declarations );
$this->set_rules_group( $rules_group );
}
/**
* Sets the selector.
*
* @since 6.1.0
*
* @param string $selector The CSS selector.
* @return WP_Style_Engine_CSS_Rule Returns the object to allow chaining of methods.
*/
public function set_selector( $selector ) {
$this->selector = $selector;
return $this;
}
/**
* Sets the declarations.
*
* @since 6.1.0
*
* @param string[]|WP_Style_Engine_CSS_Declarations $declarations An array of declarations (property => value pairs),
* or a WP_Style_Engine_CSS_Declarations object.
* @return WP_Style_Engine_CSS_Rule Returns the object to allow chaining of methods.
*/
public function add_declarations( $declarations ) {
$is_declarations_object = ! is_array( $declarations );
$declarations_array = $is_declarations_object ? $declarations->get_declarations() : $declarations;
if ( null === $this->declarations ) {
if ( $is_declarations_object ) {
$this->declarations = $declarations;
return $this;
}
$this->declarations = new WP_Style_Engine_CSS_Declarations( $declarations_array );
}
$this->declarations->add_declarations( $declarations_array );
return $this;
}
/**
* Sets the rules group.
*
* @since 6.6.0
*
* @param string $rules_group A parent CSS selector in the case of nested CSS, or a CSS nested @rule,
* such as `@media (min-width: 80rem)` or `@layer module`.
* @return WP_Style_Engine_CSS_Rule Returns the object to allow chaining of methods.
*/
public function set_rules_group( $rules_group ) {
$this->rules_group = $rules_group;
return $this;
}
/**
* Gets the rules group.
*
* @since 6.6.0
*
* @return string
*/
public function get_rules_group() {
return $this->rules_group;
}
/**
* Gets the declarations object.
*
* @since 6.1.0
*
* @return WP_Style_Engine_CSS_Declarations The declarations object.
*/
public function get_declarations() {
return $this->declarations;
}
/**
* Gets the full selector.
*
* @since 6.1.0
*
* @return string
*/
public function get_selector() {
return $this->selector;
}
/**
* Gets the CSS.
*
* @since 6.1.0
* @since 6.6.0 Added support for nested CSS with rules groups.
*
* @param bool $should_prettify Optional. Whether to add spacing, new lines and indents.
* Default false.
* @param int $indent_count Optional. The number of tab indents to apply to the rule.
* Applies if `prettify` is `true`. Default 0.
* @return string
*/
public function get_css( $should_prettify = false, $indent_count = 0 ) {
$rule_indent = $should_prettify ? str_repeat( "\t", $indent_count ) : '';
$nested_rule_indent = $should_prettify ? str_repeat( "\t", $indent_count + 1 ) : '';
$declarations_indent = $should_prettify ? $indent_count + 1 : 0;
$nested_declarations_indent = $should_prettify ? $indent_count + 2 : 0;
$suffix = $should_prettify ? "\n" : '';
$spacer = $should_prettify ? ' ' : '';
// Trims any multiple selectors strings.
$selector = $should_prettify ? implode( ',', array_map( 'trim', explode( ',', $this->get_selector() ) ) ) : $this->get_selector();
$selector = $should_prettify ? str_replace( array( ',' ), ",\n", $selector ) : $selector;
$rules_group = $this->get_rules_group();
$has_rules_group = ! empty( $rules_group );
$css_declarations = $this->declarations->get_declarations_string( $should_prettify, $has_rules_group ? $nested_declarations_indent : $declarations_indent );
if ( empty( $css_declarations ) ) {
return '';
}
if ( $has_rules_group ) {
$selector = "{$rule_indent}{$rules_group}{$spacer}{{$suffix}{$nested_rule_indent}{$selector}{$spacer}{{$suffix}{$css_declarations}{$suffix}{$nested_rule_indent}}{$suffix}{$rule_indent}}";
return $selector;
}
return "{$rule_indent}{$selector}{$spacer}{{$suffix}{$css_declarations}{$suffix}{$rule_indent}}";
}
}
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