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<?php
namespace DtCr\Modules\StyleEngine;
use DtCr\Base\ModuleBase;
class Module extends ModuleBase {
const MODULE_IDENTIFIER = 'core-style-engine';
const IS_CORE_MODULE = true;
public function setup_hooks() {
// Block supports, and other styles parsed and stored in the Style Engine.
add_action( 'wp_enqueue_scripts', array( $this, 'wp_enqueue_stored_styles' ), 20 );
add_action( 'wp_footer', array( $this, 'wp_enqueue_stored_styles' ), 2 );
}
/**
* Global public interface method to generate styles from a single style object,
* e.g. the value of a block's attributes.style object or the top level styles in theme.json.
* Example usage:
* $styles = wp_style_engine_get_styles(
* array(
* 'color' => array( 'text' => '#cccccc' ),
* )
* );
* Returns:
* array(
* 'css' => 'color: #cccccc',
* 'declarations' => array( 'color' => '#cccccc' ),
* 'classnames' => 'has-color',
* )
*
* @param array $block_styles The style object.
* @param array $options {
* Optional. An array of options. Default empty array.
*
* @type string|null $context An identifier describing the origin of the style object,
* e.g. 'block-supports' or 'global-styles'. Default null.
* When set, the style engine will attempt to store the CSS rules,
* where a selector is also passed.
* @type bool $convert_vars_to_classnames Whether to skip converting incoming CSS var patterns,
* e.g. `var:preset|<PRESET_TYPE>|<PRESET_SLUG>`,
* to `var( --wp--preset--* )` values. Default false.
* @type string $selector Optional. When a selector is passed,
* the value of `$css` in the return value will comprise
* a full CSS rule `$selector { ...$css_declarations }`,
* otherwise, the value will be a concatenated string
* of CSS declarations.
* }
* @return array {
* @type string $css A CSS ruleset or declarations block
* formatted to be placed in an HTML `style` attribute or tag.
* @type string[] $declarations An associative array of CSS definitions,
* e.g. `array( "$property" => "$value", "$property" => "$value" )`.
* @type string $classnames Classnames separated by a space.
* }
* @since 6.1.0
* @see https://developer.wordpress.org/block-editor/reference-guides/theme-json-reference/theme-json-living/#styles
* @see https://developer.wordpress.org/block-editor/reference-guides/block-api/block-supports/
*/
public static function get_styles( $block_styles, $options = array() ) {
$options = wp_parse_args(
$options,
array(
'selector' => null,
'context' => null,
'convert_vars_to_classnames' => false,
)
);
$parsed_styles = StyleEngine::parse_block_styles( $block_styles, $options );
// Output.
$styles_output = array();
if ( ! empty( $parsed_styles['declarations'] ) ) {
$styles_output['css'] = StyleEngine::compile_css( $parsed_styles['declarations'], $options['selector'] );
$styles_output['declarations'] = $parsed_styles['declarations'];
if ( ! empty( $options['context'] ) ) {
StyleEngine::store_css_rule( $options['context'], $options['selector'], $parsed_styles['declarations'] );
}
}
if ( ! empty( $parsed_styles['classnames'] ) ) {
$styles_output['classnames'] = implode( ' ', array_unique( $parsed_styles['classnames'] ) );
}
return array_filter( $styles_output );
}
/**
* Returns compiled CSS from a collection of selectors and declarations.
* Useful for returning a compiled stylesheet from any collection of CSS selector + declarations.
* Example usage:
* $css_rules = array(
* array(
* 'selector' => '.elephant-are-cool',
* 'declarations' => array(
* 'color' => 'gray',
* 'width' => '3em',
* ),
* ),
* );
* $css = wp_style_engine_get_stylesheet_from_css_rules( $css_rules );
* Returns:
* .elephant-are-cool{color:gray;width:3em}
*
* @param array $css_rules {
* Required. A collection of CSS rules.
*
* @type array ...$0 {
* @type string $selector A CSS selector.
* @type string[] $declarations An associative array of CSS definitions,
* e.g. `array( "$property" => "$value", "$property" => "$value" )`.
* }
* }
*
* @param array $options {
* Optional. An array of options. Default empty array.
*
* @type string|null $context An identifier describing the origin of the style object,
* e.g. 'block-supports' or 'global-styles'. Default 'block-supports'.
* When set, the style engine will attempt to store the CSS rules.
* @type bool $optimize Whether to optimize the CSS output, e.g. combine rules.
* Default false.
* @type bool $prettify Whether to add new lines and indents to output.
* Defaults to whether the `SCRIPT_DEBUG` constant is defined.
* }
* @return string A string of compiled CSS declarations, or empty string.
* @since 6.1.0
*/
public static function get_stylesheet_from_css_rules( $css_rules, $options = array() ) {
if ( empty( $css_rules ) ) {
return '';
}
$options = wp_parse_args(
$options,
array(
'context' => null,
)
);
$css_rule_objects = array();
foreach ( $css_rules as $css_rule ) {
if ( empty( $css_rule['selector'] ) || empty( $css_rule['declarations'] ) || ! is_array( $css_rule['declarations'] ) ) {
continue;
}
if ( ! empty( $options['context'] ) ) {
StyleEngine::store_css_rule( $options['context'], $css_rule['selector'], $css_rule['declarations'] );
}
$css_rule_objects[] = new CSSRule( $css_rule['selector'], $css_rule['declarations'] );
}
if ( empty( $css_rule_objects ) ) {
return '';
}
return StyleEngine::compile_stylesheet_from_css_rules( $css_rule_objects, $options );
}
/**
* Fetches, processes and compiles stored core styles, then combines and renders them to the page.
* Styles are stored via the style engine API.
*
* @link https://developer.wordpress.org/block-editor/reference-guides/packages/packages-style-engine/
* @since 6.1.0
*
* @param array $options {
* Optional. An array of options to pass to wp_style_engine_get_stylesheet_from_context().
* Default empty array.
*
* @type bool $optimize Whether to optimize the CSS output, e.g., combine rules.
* Default false.
* @type bool $prettify Whether to add new lines and indents to output.
* Default to whether the `SCRIPT_DEBUG` constant is defined.
* }
*/
function wp_enqueue_stored_styles( $options = array() ) {
$is_block_theme = wp_is_block_theme();
$is_classic_theme = ! $is_block_theme;
/*
* For block themes, this function prints stored styles in the header.
* For classic themes, in the footer.
*/
if ( ( $is_block_theme && doing_action( 'wp_footer' ) ) || ( $is_classic_theme && doing_action( 'wp_enqueue_scripts' ) ) ) {
return;
}
$core_styles_keys = array( 'core' );
$compiled_core_stylesheet = '';
$style_tag_id = 'dtCr';
// Adds comment if code is prettified to identify core styles sections in debugging.
$should_prettify = isset( $options['prettify'] ) ? true === $options['prettify'] : defined( 'SCRIPT_DEBUG' ) && SCRIPT_DEBUG;
foreach ( $core_styles_keys as $style_key ) {
if ( $should_prettify ) {
$compiled_core_stylesheet .= "/**\n * DtCr block styles: $style_key\n */\n";
}
// Chains core store ids to signify what the styles contain.
$style_tag_id .= '-' . $style_key;
$compiled_core_stylesheet .= self::get_stylesheet_from_context( $style_key, $options );
}
// Combines Core styles.
if ( ! empty( $compiled_core_stylesheet ) ) {
wp_register_style( $style_tag_id, false );
wp_add_inline_style( $style_tag_id, $compiled_core_stylesheet );
wp_enqueue_style( $style_tag_id );
}
}
/**
* Returns compiled CSS from a store, if found.
*
* @param string $context A valid context name, corresponding to an existing store key.
* @param array $options {
* Optional. An array of options. Default empty array.
*
* @type bool $optimize Whether to optimize the CSS output, e.g. combine rules.
* Default false.
* @type bool $prettify Whether to add new lines and indents to output.
* Defaults to whether the `SCRIPT_DEBUG` constant is defined.
* }
* @return string A compiled CSS string.
* @since 6.1.0
*/
public static function get_stylesheet_from_context( $context, $options = array() ) {
return StyleEngine::compile_stylesheet_from_css_rules( StyleEngine::get_store( $context )->get_all_rules(), $options );
}
}