WP_Style_Engine::get_css_declarations( mixed $style_value, array $style_definition, array $options = array() ): string[]

Source

protected static function get_css_declarations( $style_value, $style_definition, $options = array() ) {
	if ( isset( $style_definition['value_func'] ) && is_callable( $style_definition['value_func'] ) ) {
		return call_user_func( $style_definition['value_func'], $style_value, $style_definition, $options );
	}

	$css_declarations     = array();
	$style_property_keys  = $style_definition['property_keys'];
	$should_skip_css_vars = isset( $options['convert_vars_to_classnames'] ) && true === $options['convert_vars_to_classnames'];

	/*
	 * Build CSS var values from `var:preset|<PRESET_TYPE>|<PRESET_SLUG>` values, e.g, `var(--wp--css--rule-slug )`.
	 * Check if the value is a CSS preset and there's a corresponding css_var pattern in the style definition.
	 */
	if ( is_string( $style_value ) && str_contains( $style_value, 'var:' ) ) {
		if ( ! $should_skip_css_vars && ! empty( $style_definition['css_vars'] ) ) {
			$css_var = static::get_css_var_value( $style_value, $style_definition['css_vars'] );
			if ( static::is_valid_style_value( $css_var ) ) {
				$css_declarations[ $style_property_keys['default'] ] = $css_var;
			}
		}
		return $css_declarations;
	}

	/*
	 * Default rule builder.
	 * If the input contains an array, assume box model-like properties
	 * for styles such as margins and padding.
	 */
	if ( is_array( $style_value ) ) {
		// Bail out early if the `'individual'` property is not defined.
		if ( ! isset( $style_property_keys['individual'] ) ) {
			return $css_declarations;
		}

		foreach ( $style_value as $key => $value ) {
			if ( is_string( $value ) && str_contains( $value, 'var:' ) && ! $should_skip_css_vars && ! empty( $style_definition['css_vars'] ) ) {
				$value = static::get_css_var_value( $value, $style_definition['css_vars'] );
			}

			$individual_property = sprintf( $style_property_keys['individual'], _wp_to_kebab_case( $key ) );

			if ( $individual_property && static::is_valid_style_value( $value ) ) {
				$css_declarations[ $individual_property ] = $value;
			}
		}

		return $css_declarations;
	}

	$css_declarations[ $style_property_keys['default'] ] = $style_value;
	return $css_declarations;
}

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