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Edit File: style-engine.php
<?php /** * Style engine: Public functions * * This file contains a variety of public functions developers can use to interact with * the Style Engine API. * * @package WordPress * @subpackage StyleEngine * @since 6.1.0 */ /** * 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', * ) * * @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/ * * @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. * } */ function wp_style_engine_get_styles( $block_styles, $options = array() ) { $options = wp_parse_args( $options, array( 'selector' => null, 'context' => null, 'convert_vars_to_classnames' => false, ) ); $parsed_styles = WP_Style_Engine::parse_block_styles( $block_styles, $options ); // Output. $styles_output = array(); if ( ! empty( $parsed_styles['declarations'] ) ) { $styles_output['css'] = WP_Style_Engine::compile_css( $parsed_styles['declarations'], $options['selector'] ); $styles_output['declarations'] = $parsed_styles['declarations']; if ( ! empty( $options['context'] ) ) { WP_Style_Engine::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( $css_rules ); * * Returns: * * .elephant-are-cool{color:gray;width:3em} * * @since 6.1.0 * @since 6.6.0 Added support for `$rules_group` in the `$css_rules` array. * * @param array $css_rules { * Required. A collection of CSS rules. * * @type array ...$0 { * @type 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`. * @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. */ function wp_style_engine_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; } $rules_group = $css_rule['rules_group'] ?? null; if ( ! empty( $options['context'] ) ) { WP_Style_Engine::store_css_rule( $options['context'], $css_rule['selector'], $css_rule['declarations'], $rules_group ); } $css_rule_objects[] = new WP_Style_Engine_CSS_Rule( $css_rule['selector'], $css_rule['declarations'], $rules_group ); } if ( empty( $css_rule_objects ) ) { return ''; } return WP_Style_Engine::compile_stylesheet_from_css_rules( $css_rule_objects, $options ); } /** * Returns compiled CSS from a store, if found. * * @since 6.1.0 * * @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. */ function wp_style_engine_get_stylesheet_from_context( $context, $options = array() ) { return WP_Style_Engine::compile_stylesheet_from_css_rules( WP_Style_Engine::get_store( $context )->get_all_rules(), $options ); }