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<?php
/**
* Style Engine: WP_Style_Engine_CSS_Declarations class
*
* @package WordPress
* @subpackage StyleEngine
* @since 6.1.0
*/
/**
* Core class used for style engine CSS declarations.
*
* Holds, sanitizes, processes, and prints CSS declarations for the style engine.
*
* @since 6.1.0
*/
#[AllowDynamicProperties]
class WP_Style_Engine_CSS_Declarations {
/**
* An array of CSS declarations (property => value pairs).
*
* @since 6.1.0
*
* @var string[]
*/
protected $declarations = array();
/**
* Constructor for this object.
*
* If a `$declarations` array is passed, it will be used to populate
* the initial `$declarations` prop of the object by calling add_declarations().
*
* @since 6.1.0
*
* @param string[] $declarations Optional. An associative array of CSS definitions,
* e.g. `array( "$property" => "$value", "$property" => "$value" )`.
* Default empty array.
*/
public function __construct( $declarations = array() ) {
$this->add_declarations( $declarations );
}
/**
* Adds a single declaration.
*
* @since 6.1.0
*
* @param string $property The CSS property.
* @param string $value The CSS value.
* @return WP_Style_Engine_CSS_Declarations Returns the object to allow chaining methods.
*/
public function add_declaration( $property, $value ) {
// Sanitizes the property.
$property = $this->sanitize_property( $property );
// Bails early if the property is empty.
if ( empty( $property ) ) {
return $this;
}
// Bail early if value is not a string. Prevents fatal errors from malformed block markup.
if ( ! is_string( $value ) ) {
return $this;
}
// Trims the value. If empty, bail early.
$value = trim( $value );
if ( '' === $value ) {
return $this;
}
// Adds the declaration property/value pair.
$this->declarations[ $property ] = $value;
return $this;
}
/**
* Removes a single declaration.
*
* @since 6.1.0
*
* @param string $property The CSS property.
* @return WP_Style_Engine_CSS_Declarations Returns the object to allow chaining methods.
*/
public function remove_declaration( $property ) {
unset( $this->declarations[ $property ] );
return $this;
}
/**
* Adds multiple declarations.
*
* @since 6.1.0
*
* @param string[] $declarations An array of declarations.
* @return WP_Style_Engine_CSS_Declarations Returns the object to allow chaining methods.
*/
public function add_declarations( $declarations ) {
foreach ( $declarations as $property => $value ) {
$this->add_declaration( $property, $value );
}
return $this;
}
/**
* Removes multiple declarations.
*
* @since 6.1.0
*
* @param string[] $properties Optional. An array of properties. Default empty array.
* @return WP_Style_Engine_CSS_Declarations Returns the object to allow chaining methods.
*/
public function remove_declarations( $properties = array() ) {
foreach ( $properties as $property ) {
$this->remove_declaration( $property );
}
return $this;
}
/**
* Gets the declarations array.
*
* @since 6.1.0
*
* @return string[] The declarations array.
*/
public function get_declarations() {
return $this->declarations;
}
/**
* Filters a CSS property + value pair.
*
* @since 6.1.0
*
* @param string $property The CSS property.
* @param string $value The value to be filtered.
* @param string $spacer Optional. The spacer between the colon and the value.
* Default empty string.
* @return string The filtered declaration or an empty string.
*/
protected static function filter_declaration( $property, $value, $spacer = '' ) {
$filtered_value = wp_strip_all_tags( $value, true );
if ( '' !== $filtered_value ) {
return safecss_filter_attr( "{$property}:{$spacer}{$filtered_value}" );
}
return '';
}
/**
* Filters and compiles the CSS declarations.
*
* @since 6.1.0
*
* @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 The CSS declarations.
*/
public function get_declarations_string( $should_prettify = false, $indent_count = 0 ) {
$declarations_array = $this->get_declarations();
$declarations_output = '';
$indent = $should_prettify ? str_repeat( "\t", $indent_count ) : '';
$suffix = $should_prettify ? ' ' : '';
$suffix = $should_prettify && $indent_count > 0 ? "\n" : $suffix;
$spacer = $should_prettify ? ' ' : '';
foreach ( $declarations_array as $property => $value ) {
$filtered_declaration = static::filter_declaration( $property, $value, $spacer );
if ( $filtered_declaration ) {
$declarations_output .= "{$indent}{$filtered_declaration};$suffix";
}
}
return rtrim( $declarations_output );
}
/**
* Sanitizes property names.
*
* @since 6.1.0
*
* @param string $property The CSS property.
* @return string The sanitized property name.
*/
protected function sanitize_property( $property ) {
return sanitize_key( $property );
}
}