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The default value is set to `true` in `WP_Style_Engine_Processor::get_css()`, but was previously documented as `false` in various DocBlocks. Follow-up to [54156], [55719], [55733], [55819]. See #57840. Built from https://develop.svn.wordpress.org/trunk@55820 git-svn-id: http://core.svn.wordpress.org/trunk@55332 1a063a9b-81f0-0310-95a4-ce76da25c4cd
621 lines
23 KiB
PHP
621 lines
23 KiB
PHP
<?php
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/**
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* Style Engine: WP_Style_Engine class
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*
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* @package WordPress
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* @subpackage StyleEngine
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* @since 6.1.0
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*/
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/**
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* The main class integrating all other WP_Style_Engine_* classes.
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*
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* The Style Engine aims to provide a consistent API for rendering styling for blocks
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* across both client-side and server-side applications.
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*
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* This class is final and should not be extended.
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*
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* This class is for internal Core usage and is not supposed to be used by extenders
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* (plugins and/or themes). This is a low-level API that may need to do breaking changes.
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* Please, use wp_style_engine_get_styles() instead.
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*
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* @access private
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* @since 6.1.0
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*/
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#[AllowDynamicProperties]
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final class WP_Style_Engine {
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/**
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* Style definitions that contain the instructions to
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* parse/output valid Gutenberg styles from a block's attributes.
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*
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* For every style definition, the following properties are valid:
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*
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* - classnames => (array) An array of classnames to be returned for block styles.
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* The key is a classname or pattern.
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* A value of `true` means the classname should be applied always.
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* Otherwise, a valid CSS property (string) to match the incoming value,
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* e.g. "color" to match var:preset|color|somePresetSlug.
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* - css_vars => (array) An array of key value pairs used to generate CSS var values.
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* The key is a CSS var pattern, whose `$slug` fragment will be replaced with a preset slug.
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* The value should be a valid CSS property (string) to match the incoming value,
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* e.g. "color" to match var:preset|color|somePresetSlug.
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* - property_keys => (array) An array of keys whose values represent a valid CSS property,
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* e.g. "margin" or "border".
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* - path => (array) A path that accesses the corresponding style value in the block style object.
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* - value_func => (string) The name of a function to generate a CSS definition array
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* for a particular style object. The output of this function should be
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* `array( "$property" => "$value", ... )`.
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*
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* @since 6.1.0
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* @var array
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*/
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const BLOCK_STYLE_DEFINITIONS_METADATA = array(
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'color' => array(
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'text' => array(
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'property_keys' => array(
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'default' => 'color',
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),
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'path' => array( 'color', 'text' ),
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'css_vars' => array(
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'color' => '--wp--preset--color--$slug',
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),
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'classnames' => array(
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'has-text-color' => true,
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'has-$slug-color' => 'color',
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),
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),
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'background' => array(
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'property_keys' => array(
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'default' => 'background-color',
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),
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'path' => array( 'color', 'background' ),
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'classnames' => array(
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'has-background' => true,
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'has-$slug-background-color' => 'color',
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),
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),
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'gradient' => array(
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'property_keys' => array(
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'default' => 'background',
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),
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'path' => array( 'color', 'gradient' ),
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'classnames' => array(
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'has-background' => true,
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'has-$slug-gradient-background' => 'gradient',
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),
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),
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),
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'border' => array(
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'color' => array(
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'property_keys' => array(
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'default' => 'border-color',
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'individual' => 'border-%s-color',
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),
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'path' => array( 'border', 'color' ),
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'classnames' => array(
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'has-border-color' => true,
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'has-$slug-border-color' => 'color',
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),
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),
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'radius' => array(
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'property_keys' => array(
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'default' => 'border-radius',
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'individual' => 'border-%s-radius',
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),
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'path' => array( 'border', 'radius' ),
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),
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'style' => array(
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'property_keys' => array(
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'default' => 'border-style',
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'individual' => 'border-%s-style',
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),
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'path' => array( 'border', 'style' ),
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),
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'width' => array(
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'property_keys' => array(
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'default' => 'border-width',
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'individual' => 'border-%s-width',
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),
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'path' => array( 'border', 'width' ),
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),
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'top' => array(
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'value_func' => array( self::class, 'get_individual_property_css_declarations' ),
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'path' => array( 'border', 'top' ),
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'css_vars' => array(
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'color' => '--wp--preset--color--$slug',
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),
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),
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'right' => array(
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'value_func' => array( self::class, 'get_individual_property_css_declarations' ),
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'path' => array( 'border', 'right' ),
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'css_vars' => array(
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'color' => '--wp--preset--color--$slug',
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),
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),
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'bottom' => array(
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'value_func' => array( self::class, 'get_individual_property_css_declarations' ),
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'path' => array( 'border', 'bottom' ),
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'css_vars' => array(
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'color' => '--wp--preset--color--$slug',
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),
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),
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'left' => array(
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'value_func' => array( self::class, 'get_individual_property_css_declarations' ),
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'path' => array( 'border', 'left' ),
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'css_vars' => array(
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'color' => '--wp--preset--color--$slug',
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),
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),
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),
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'dimensions' => array(
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'minHeight' => array(
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'property_keys' => array(
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'default' => 'min-height',
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),
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'path' => array( 'dimensions', 'minHeight' ),
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'css_vars' => array(
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'spacing' => '--wp--preset--spacing--$slug',
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),
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),
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),
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'spacing' => array(
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'padding' => array(
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'property_keys' => array(
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'default' => 'padding',
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'individual' => 'padding-%s',
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),
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'path' => array( 'spacing', 'padding' ),
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'css_vars' => array(
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'spacing' => '--wp--preset--spacing--$slug',
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),
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),
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'margin' => array(
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'property_keys' => array(
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'default' => 'margin',
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'individual' => 'margin-%s',
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),
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'path' => array( 'spacing', 'margin' ),
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'css_vars' => array(
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'spacing' => '--wp--preset--spacing--$slug',
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),
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),
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),
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'typography' => array(
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'fontSize' => array(
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'property_keys' => array(
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'default' => 'font-size',
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),
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'path' => array( 'typography', 'fontSize' ),
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'classnames' => array(
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'has-$slug-font-size' => 'font-size',
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),
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),
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'fontFamily' => array(
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'property_keys' => array(
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'default' => 'font-family',
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),
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'path' => array( 'typography', 'fontFamily' ),
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'classnames' => array(
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'has-$slug-font-family' => 'font-family',
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),
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),
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'fontStyle' => array(
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'property_keys' => array(
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'default' => 'font-style',
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),
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'path' => array( 'typography', 'fontStyle' ),
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),
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'fontWeight' => array(
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'property_keys' => array(
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'default' => 'font-weight',
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),
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'path' => array( 'typography', 'fontWeight' ),
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),
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'lineHeight' => array(
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'property_keys' => array(
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'default' => 'line-height',
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),
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'path' => array( 'typography', 'lineHeight' ),
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),
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'textDecoration' => array(
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'property_keys' => array(
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'default' => 'text-decoration',
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),
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'path' => array( 'typography', 'textDecoration' ),
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),
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'textTransform' => array(
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'property_keys' => array(
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'default' => 'text-transform',
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),
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'path' => array( 'typography', 'textTransform' ),
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),
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'letterSpacing' => array(
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'property_keys' => array(
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'default' => 'letter-spacing',
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),
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'path' => array( 'typography', 'letterSpacing' ),
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),
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),
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);
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/**
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* Util: Extracts the slug in kebab case from a preset string,
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* e.g. `heavenly-blue` from `var:preset|color|heavenlyBlue`.
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*
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* @since 6.1.0
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*
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* @param string $style_value A single CSS preset value.
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* @param string $property_key The CSS property that is the second element of the preset string.
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* Used for matching.
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* @return string The slug, or empty string if not found.
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*/
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protected static function get_slug_from_preset_value( $style_value, $property_key ) {
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if ( is_string( $style_value ) && is_string( $property_key )
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&& str_contains( $style_value, "var:preset|{$property_key}|" )
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) {
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$index_to_splice = strrpos( $style_value, '|' ) + 1;
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return _wp_to_kebab_case( substr( $style_value, $index_to_splice ) );
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}
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return '';
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}
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/**
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* Util: Generates a CSS var string, e.g. `var(--wp--preset--color--background)`
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* from a preset string such as `var:preset|space|50`.
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*
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* @since 6.1.0
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*
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* @param string $style_value A single CSS preset value.
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* @param string[] $css_vars An associate array of CSS var patterns
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* used to generate the var string.
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* @return string The CSS var, or an empty string if no match for slug found.
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*/
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protected static function get_css_var_value( $style_value, $css_vars ) {
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foreach ( $css_vars as $property_key => $css_var_pattern ) {
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$slug = static::get_slug_from_preset_value( $style_value, $property_key );
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if ( static::is_valid_style_value( $slug ) ) {
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$var = strtr(
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$css_var_pattern,
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array( '$slug' => $slug )
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);
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return "var($var)";
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}
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}
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return '';
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}
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/**
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* Util: Checks whether an incoming block style value is valid.
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*
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* @since 6.1.0
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*
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* @param string $style_value A single CSS preset value.
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* @return bool
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*/
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protected static function is_valid_style_value( $style_value ) {
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return '0' === $style_value || ! empty( $style_value );
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}
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/**
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* Stores a CSS rule using the provided CSS selector and CSS declarations.
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*
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* @since 6.1.0
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*
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* @param string $store_name A valid store key.
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* @param string $css_selector When a selector is passed, the function will return
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* a full CSS rule `$selector { ...rules }`
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* otherwise a concatenated string of properties and values.
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* @param string[] $css_declarations An associative array of CSS definitions,
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* e.g. `array( "$property" => "$value", "$property" => "$value" )`.
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*/
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public static function store_css_rule( $store_name, $css_selector, $css_declarations ) {
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if ( empty( $store_name ) || empty( $css_selector ) || empty( $css_declarations ) ) {
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return;
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}
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static::get_store( $store_name )->add_rule( $css_selector )->add_declarations( $css_declarations );
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}
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/**
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* Returns a store by store key.
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*
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* @since 6.1.0
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*
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* @param string $store_name A store key.
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* @return WP_Style_Engine_CSS_Rules_Store|null
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*/
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public static function get_store( $store_name ) {
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return WP_Style_Engine_CSS_Rules_Store::get_store( $store_name );
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}
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/**
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* Returns classnames and CSS based on the values in a styles object.
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*
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* Return values are parsed based on the instructions in BLOCK_STYLE_DEFINITIONS_METADATA.
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*
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* @since 6.1.0
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*
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* @param array $block_styles The style object.
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* @param array $options {
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* Optional. An array of options. Default empty array.
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*
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* @type bool $convert_vars_to_classnames Whether to skip converting incoming CSS var patterns,
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* e.g. `var:preset|<PRESET_TYPE>|<PRESET_SLUG>`,
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* to `var( --wp--preset--* )` values. Default false.
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* @type string $selector Optional. When a selector is passed,
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* the value of `$css` in the return value will comprise
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* a full CSS rule `$selector { ...$css_declarations }`,
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* otherwise, the value will be a concatenated string
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* of CSS declarations.
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* }
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* @return array {
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* @type string[] $classnames Array of class names.
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* @type string[] $declarations An associative array of CSS definitions,
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* e.g. `array( "$property" => "$value", "$property" => "$value" )`.
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* }
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*/
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public static function parse_block_styles( $block_styles, $options ) {
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$parsed_styles = array(
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'classnames' => array(),
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'declarations' => array(),
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);
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if ( empty( $block_styles ) || ! is_array( $block_styles ) ) {
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return $parsed_styles;
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}
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// Collect CSS and classnames.
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foreach ( static::BLOCK_STYLE_DEFINITIONS_METADATA as $definition_group_key => $definition_group_style ) {
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if ( empty( $block_styles[ $definition_group_key ] ) ) {
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continue;
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}
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foreach ( $definition_group_style as $style_definition ) {
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$style_value = _wp_array_get( $block_styles, $style_definition['path'], null );
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if ( ! static::is_valid_style_value( $style_value ) ) {
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continue;
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}
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$parsed_styles['classnames'] = array_merge( $parsed_styles['classnames'], static::get_classnames( $style_value, $style_definition ) );
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$parsed_styles['declarations'] = array_merge( $parsed_styles['declarations'], static::get_css_declarations( $style_value, $style_definition, $options ) );
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}
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}
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return $parsed_styles;
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}
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/**
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* Returns classnames, and generates classname(s) from a CSS preset property pattern,
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* e.g. `var:preset|<PRESET_TYPE>|<PRESET_SLUG>`.
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*
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* @since 6.1.0
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*
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* @param string $style_value A single raw style value or CSS preset property
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* from the `$block_styles` array.
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* @param array $style_definition A single style definition from BLOCK_STYLE_DEFINITIONS_METADATA.
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* @return string[] An array of CSS classnames, or empty array if there are none.
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*/
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protected static function get_classnames( $style_value, $style_definition ) {
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if ( empty( $style_value ) ) {
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return array();
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}
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$classnames = array();
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if ( ! empty( $style_definition['classnames'] ) ) {
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foreach ( $style_definition['classnames'] as $classname => $property_key ) {
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if ( true === $property_key ) {
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$classnames[] = $classname;
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}
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$slug = static::get_slug_from_preset_value( $style_value, $property_key );
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if ( $slug ) {
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/*
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* Right now we expect a classname pattern to be stored in BLOCK_STYLE_DEFINITIONS_METADATA.
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* One day, if there are no stored schemata, we could allow custom patterns or
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* generate classnames based on other properties
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* such as a path or a value or a prefix passed in options.
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*/
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$classnames[] = strtr( $classname, array( '$slug' => $slug ) );
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}
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}
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}
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return $classnames;
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}
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|
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/**
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* Returns an array of CSS declarations based on valid block style values.
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*
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* @since 6.1.0
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*
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* @param mixed $style_value A single raw style value from $block_styles array.
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* @param array $style_definition A single style definition from BLOCK_STYLE_DEFINITIONS_METADATA.
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* @param array $options {
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* Optional. An array of options. Default empty array.
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*
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* @type bool $convert_vars_to_classnames Whether to skip converting incoming CSS var patterns,
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* e.g. `var:preset|<PRESET_TYPE>|<PRESET_SLUG>`,
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* to `var( --wp--preset--* )` values. Default false.
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* }
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* @return string[] An associative array of CSS definitions, e.g. `array( "$property" => "$value", "$property" => "$value" )`.
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*/
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protected static function get_css_declarations( $style_value, $style_definition, $options = array() ) {
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if ( isset( $style_definition['value_func'] ) && is_callable( $style_definition['value_func'] ) ) {
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return call_user_func( $style_definition['value_func'], $style_value, $style_definition, $options );
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}
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$css_declarations = array();
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$style_property_keys = $style_definition['property_keys'];
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$should_skip_css_vars = isset( $options['convert_vars_to_classnames'] ) && true === $options['convert_vars_to_classnames'];
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/*
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* Build CSS var values from `var:preset|<PRESET_TYPE>|<PRESET_SLUG>` values, e.g, `var(--wp--css--rule-slug )`.
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* Check if the value is a CSS preset and there's a corresponding css_var pattern in the style definition.
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*/
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if ( is_string( $style_value ) && str_contains( $style_value, 'var:' ) ) {
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if ( ! $should_skip_css_vars && ! empty( $style_definition['css_vars'] ) ) {
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$css_var = static::get_css_var_value( $style_value, $style_definition['css_vars'] );
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if ( static::is_valid_style_value( $css_var ) ) {
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$css_declarations[ $style_property_keys['default'] ] = $css_var;
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}
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}
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return $css_declarations;
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}
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/*
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* Default rule builder.
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* If the input contains an array, assume box model-like properties
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* 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 $css_declarations;
|
|
}
|
|
|
|
/**
|
|
* Style value parser that returns a CSS definition array comprising style properties
|
|
* that have keys representing individual style properties, otherwise known as longhand CSS properties.
|
|
*
|
|
* Example:
|
|
*
|
|
* "$style_property-$individual_feature: $value;"
|
|
*
|
|
* Which could represent the following:
|
|
*
|
|
* "border-{top|right|bottom|left}-{color|width|style}: {value};"
|
|
*
|
|
* or:
|
|
*
|
|
* "border-image-{outset|source|width|repeat|slice}: {value};"
|
|
*
|
|
* @since 6.1.0
|
|
*
|
|
* @param array $style_value A single raw style value from `$block_styles` array.
|
|
* @param array $individual_property_definition A single style definition from BLOCK_STYLE_DEFINITIONS_METADATA
|
|
* representing an individual property of a CSS property,
|
|
* e.g. 'top' in 'border-top'.
|
|
* @param array $options {
|
|
* Optional. An array of options. Default empty array.
|
|
*
|
|
* @type bool $convert_vars_to_classnames Whether to skip converting incoming CSS var patterns,
|
|
* e.g. `var:preset|<PRESET_TYPE>|<PRESET_SLUG>`,
|
|
* to `var( --wp--preset--* )` values. Default false.
|
|
* }
|
|
* @return string[] An associative array of CSS definitions, e.g. `array( "$property" => "$value", "$property" => "$value" )`.
|
|
*/
|
|
protected static function get_individual_property_css_declarations( $style_value, $individual_property_definition, $options = array() ) {
|
|
if ( ! is_array( $style_value ) || empty( $style_value ) || empty( $individual_property_definition['path'] ) ) {
|
|
return array();
|
|
}
|
|
|
|
/*
|
|
* The first item in $individual_property_definition['path'] array
|
|
* tells us the style property, e.g. "border". We use this to get a corresponding
|
|
* CSS style definition such as "color" or "width" from the same group.
|
|
*
|
|
* The second item in $individual_property_definition['path'] array
|
|
* refers to the individual property marker, e.g. "top".
|
|
*/
|
|
$definition_group_key = $individual_property_definition['path'][0];
|
|
$individual_property_key = $individual_property_definition['path'][1];
|
|
$should_skip_css_vars = isset( $options['convert_vars_to_classnames'] ) && true === $options['convert_vars_to_classnames'];
|
|
$css_declarations = array();
|
|
|
|
foreach ( $style_value as $css_property => $value ) {
|
|
if ( empty( $value ) ) {
|
|
continue;
|
|
}
|
|
|
|
// Build a path to the individual rules in definitions.
|
|
$style_definition_path = array( $definition_group_key, $css_property );
|
|
$style_definition = _wp_array_get( static::BLOCK_STYLE_DEFINITIONS_METADATA, $style_definition_path, null );
|
|
|
|
if ( $style_definition && isset( $style_definition['property_keys']['individual'] ) ) {
|
|
// Set a CSS var if there is a valid preset value.
|
|
if ( is_string( $value ) && str_contains( $value, 'var:' )
|
|
&& ! $should_skip_css_vars && ! empty( $individual_property_definition['css_vars'] )
|
|
) {
|
|
$value = static::get_css_var_value( $value, $individual_property_definition['css_vars'] );
|
|
}
|
|
|
|
$individual_css_property = sprintf( $style_definition['property_keys']['individual'], $individual_property_key );
|
|
|
|
$css_declarations[ $individual_css_property ] = $value;
|
|
}
|
|
}
|
|
return $css_declarations;
|
|
}
|
|
|
|
/**
|
|
* Returns compiled CSS from CSS declarations.
|
|
*
|
|
* @since 6.1.0
|
|
*
|
|
* @param string[] $css_declarations An associative array of CSS definitions,
|
|
* e.g. `array( "$property" => "$value", "$property" => "$value" )`.
|
|
* @param string $css_selector When a selector is passed, the function will return
|
|
* a full CSS rule `$selector { ...rules }`,
|
|
* otherwise a concatenated string of properties and values.
|
|
* @return string A compiled CSS string.
|
|
*/
|
|
public static function compile_css( $css_declarations, $css_selector ) {
|
|
if ( empty( $css_declarations ) || ! is_array( $css_declarations ) ) {
|
|
return '';
|
|
}
|
|
|
|
// Return an entire rule if there is a selector.
|
|
if ( $css_selector ) {
|
|
$css_rule = new WP_Style_Engine_CSS_Rule( $css_selector, $css_declarations );
|
|
return $css_rule->get_css();
|
|
}
|
|
|
|
$css_declarations = new WP_Style_Engine_CSS_Declarations( $css_declarations );
|
|
return $css_declarations->get_declarations_string();
|
|
}
|
|
|
|
/**
|
|
* Returns a compiled stylesheet from stored CSS rules.
|
|
*
|
|
* @since 6.1.0
|
|
*
|
|
* @param WP_Style_Engine_CSS_Rule[] $css_rules An array of WP_Style_Engine_CSS_Rule objects
|
|
* from a store or otherwise.
|
|
* @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 true.
|
|
* @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 stylesheet from stored CSS rules.
|
|
*/
|
|
public static function compile_stylesheet_from_css_rules( $css_rules, $options = array() ) {
|
|
$processor = new WP_Style_Engine_Processor();
|
|
$processor->add_rules( $css_rules );
|
|
return $processor->get_css( $options );
|
|
}
|
|
}
|