<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN"
"http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head><meta http-equiv="content-type" content="text/html; charset=utf-8" />
<title>[54156] trunk: Editor: Backport Style Engine API functions, classes and tests.</title>
</head>
<body>

<style type="text/css"><!--
#msg dl.meta { border: 1px #006 solid; background: #369; padding: 6px; color: #fff; }
#msg dl.meta dt { float: left; width: 6em; font-weight: bold; }
#msg dt:after { content:':';}
#msg dl, #msg dt, #msg ul, #msg li, #header, #footer, #logmsg { font-family: verdana,arial,helvetica,sans-serif; font-size: 10pt;  }
#msg dl a { font-weight: bold}
#msg dl a:link    { color:#fc3; }
#msg dl a:active  { color:#ff0; }
#msg dl a:visited { color:#cc6; }
h3 { font-family: verdana,arial,helvetica,sans-serif; font-size: 10pt; font-weight: bold; }
#msg pre { white-space: pre-line; overflow: auto; background: #ffc; border: 1px #fa0 solid; padding: 6px; }
#logmsg { background: #ffc; border: 1px #fa0 solid; padding: 1em 1em 0 1em; }
#logmsg p, #logmsg pre, #logmsg blockquote { margin: 0 0 1em 0; }
#logmsg p, #logmsg li, #logmsg dt, #logmsg dd { line-height: 14pt; }
#logmsg h1, #logmsg h2, #logmsg h3, #logmsg h4, #logmsg h5, #logmsg h6 { margin: .5em 0; }
#logmsg h1:first-child, #logmsg h2:first-child, #logmsg h3:first-child, #logmsg h4:first-child, #logmsg h5:first-child, #logmsg h6:first-child { margin-top: 0; }
#logmsg ul, #logmsg ol { padding: 0; list-style-position: inside; margin: 0 0 0 1em; }
#logmsg ul { text-indent: -1em; padding-left: 1em; }#logmsg ol { text-indent: -1.5em; padding-left: 1.5em; }
#logmsg > ul, #logmsg > ol { margin: 0 0 1em 0; }
#logmsg pre { background: #eee; padding: 1em; }
#logmsg blockquote { border: 1px solid #fa0; border-left-width: 10px; padding: 1em 1em 0 1em; background: white;}
#logmsg dl { margin: 0; }
#logmsg dt { font-weight: bold; }
#logmsg dd { margin: 0; padding: 0 0 0.5em 0; }
#logmsg dd:before { content:'\00bb';}
#logmsg table { border-spacing: 0px; border-collapse: collapse; border-top: 4px solid #fa0; border-bottom: 1px solid #fa0; background: #fff; }
#logmsg table th { text-align: left; font-weight: normal; padding: 0.2em 0.5em; border-top: 1px dotted #fa0; }
#logmsg table td { text-align: right; border-top: 1px dotted #fa0; padding: 0.2em 0.5em; }
#logmsg table thead th { text-align: center; border-bottom: 1px solid #fa0; }
#logmsg table th.Corner { text-align: left; }
#logmsg hr { border: none 0; border-top: 2px dashed #fa0; height: 1px; }
#header, #footer { color: #fff; background: #636; border: 1px #300 solid; padding: 6px; }
#patch { width: 100%; }
#patch h4 {font-family: verdana,arial,helvetica,sans-serif;font-size:10pt;padding:8px;background:#369;color:#fff;margin:0;}
#patch .propset h4, #patch .binary h4 {margin:0;}
#patch pre {padding:0;line-height:1.2em;margin:0;}
#patch .diff {width:100%;background:#eee;padding: 0 0 10px 0;overflow:auto;}
#patch .propset .diff, #patch .binary .diff  {padding:10px 0;}
#patch span {display:block;padding:0 10px;}
#patch .modfile, #patch .addfile, #patch .delfile, #patch .propset, #patch .binary, #patch .copfile {border:1px solid #ccc;margin:10px 0;}
#patch ins {background:#dfd;text-decoration:none;display:block;padding:0 10px;}
#patch del {background:#fdd;text-decoration:none;display:block;padding:0 10px;}
#patch .lines, .info {color:#888;background:#fff;}
--></style>
<div id="msg">
<dl class="meta" style="font-size: 105%">
<dt style="float: left; width: 6em; font-weight: bold">Revision</dt> <dd><a style="font-weight: bold" href="https://core.trac.wordpress.org/changeset/54156">54156</a><script type="application/ld+json">{"@context":"http://schema.org","@type":"EmailMessage","description":"Review this Commit","action":{"@type":"ViewAction","url":"https://core.trac.wordpress.org/changeset/54156","name":"Review Commit"}}</script></dd>
<dt style="float: left; width: 6em; font-weight: bold">Author</dt> <dd>audrasjb</dd>
<dt style="float: left; width: 6em; font-weight: bold">Date</dt> <dd>2022-09-14 12:46:33 +0000 (Wed, 14 Sep 2022)</dd>
</dl>

<pre style='padding-left: 1em; margin: 2em 0; border-left: 2px solid #ccc; line-height: 1.25; font-size: 105%; font-family: sans-serif'>Editor: Backport Style Engine API functions, classes and tests.

This PR migrates the Style Engine PHP functions, classes and tests into Core for 6.1. It backports the original [WordPress/gutenberg<a href="https://core.trac.wordpress.org/ticket/40260">#40260</a> PR <a href="https://core.trac.wordpress.org/ticket/40260">#40260</a>] from Gutenberg repository.

Props ramonopoly, bernhard-reiter, costdev, azaozz, andrewserong, mukesh27, aristath.
See <a href="https://core.trac.wordpress.org/ticket/56467">#56467</a>.</pre>

<h3>Modified Paths</h3>
<ul>
<li><a href="#trunksrcwpsettingsphp">trunk/src/wp-settings.php</a></li>
</ul>

<h3>Added Paths</h3>
<ul>
<li>trunk/src/wp-includes/style-engine/</li>
<li><a href="#trunksrcwpincludesstyleengineclasswpstyleenginecssdeclarationsphp">trunk/src/wp-includes/style-engine/class-wp-style-engine-css-declarations.php</a></li>
<li><a href="#trunksrcwpincludesstyleengineclasswpstyleenginecssrulephp">trunk/src/wp-includes/style-engine/class-wp-style-engine-css-rule.php</a></li>
<li><a href="#trunksrcwpincludesstyleengineclasswpstyleenginecssrulesstorephp">trunk/src/wp-includes/style-engine/class-wp-style-engine-css-rules-store.php</a></li>
<li><a href="#trunksrcwpincludesstyleengineclasswpstyleengineprocessorphp">trunk/src/wp-includes/style-engine/class-wp-style-engine-processor.php</a></li>
<li><a href="#trunksrcwpincludesstyleengineclasswpstyleenginephp">trunk/src/wp-includes/style-engine/class-wp-style-engine.php</a></li>
<li><a href="#trunksrcwpincludesstyleenginephp">trunk/src/wp-includes/style-engine.php</a></li>
<li>trunk/tests/phpunit/tests/style-engine/</li>
<li><a href="#trunktestsphpunittestsstyleenginestyleEnginephp">trunk/tests/phpunit/tests/style-engine/styleEngine.php</a></li>
<li><a href="#trunktestsphpunittestsstyleenginewpStyleEngineCssDeclarationsphp">trunk/tests/phpunit/tests/style-engine/wpStyleEngineCssDeclarations.php</a></li>
<li><a href="#trunktestsphpunittestsstyleenginewpStyleEngineCssRulephp">trunk/tests/phpunit/tests/style-engine/wpStyleEngineCssRule.php</a></li>
<li><a href="#trunktestsphpunittestsstyleenginewpStyleEngineCssRulesStorephp">trunk/tests/phpunit/tests/style-engine/wpStyleEngineCssRulesStore.php</a></li>
<li><a href="#trunktestsphpunittestsstyleenginewpStyleEngineProcessorphp">trunk/tests/phpunit/tests/style-engine/wpStyleEngineProcessor.php</a></li>
</ul>

</div>
<div id="patch">
<h3>Diff</h3>
<a id="trunksrcwpincludesstyleengineclasswpstyleenginecssdeclarationsphp"></a>
<div class="addfile"><h4 style="background-color: #eee; color: inherit; margin: 1em 0; padding: 1.3em; font-size: 115%">Added: trunk/src/wp-includes/style-engine/class-wp-style-engine-css-declarations.php</h4>
<pre class="diff"><span>
<span class="info" style="display: block; padding: 0 10px; color: #888">--- trunk/src/wp-includes/style-engine/class-wp-style-engine-css-declarations.php                             (rev 0)
+++ trunk/src/wp-includes/style-engine/class-wp-style-engine-css-declarations.php       2022-09-14 12:46:33 UTC (rev 54156)
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -0,0 +1,189 @@
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+<?php
+/**
+ * WP_Style_Engine_CSS_Declarations
+ *
+ * Holds, sanitizes and prints CSS rules declarations
+ *
+ * @package WordPress
+ * @subpackage StyleEngine
+ * @since 6.1.0
+ */
+
+/**
+ * Class WP_Style_Engine_CSS_Declarations.
+ *
+ * Holds, sanitizes, processes and prints CSS declarations for the style engine.
+ *
+ * @since 6.1.0
+ */
+class WP_Style_Engine_CSS_Declarations {
+
+       /**
+        * An array of CSS declarations (property => value pairs).
+        *
+        * @since 6.1.0
+        *
+        * @var array
+        */
+       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[] $declarations An associative array of CSS definitions, e.g., array( "$property" => "$value", "$property" => "$value" ).
+        */
+       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;
+               }
+
+               // 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 array $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 array $properties An array of properties.
+        *
+        * @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 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   The spacer between the colon and the value. Defaults to an 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 Whether to add spacing, new lines and indents.
+        * @param number $indent_count    The number of tab indents to apply to the rule. Applies if `prettify` is `true`.
+        *
+        * @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 );
+       }
+}
</ins><span class="cx" style="display: block; padding: 0 10px">Property changes on: trunk/src/wp-includes/style-engine/class-wp-style-engine-css-declarations.php
</span><span class="cx" style="display: block; padding: 0 10px">___________________________________________________________________
</span></span></pre></div>
<a id="svneolstyle"></a>
<div class="addfile"><h4 style="background-color: #eee; color: inherit; margin: 1em 0; padding: 1.3em; font-size: 115%">Added: svn:eol-style</h4></div>
<ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+native
</ins><span class="cx" style="display: block; padding: 0 10px">\ No newline at end of property
</span><a id="trunksrcwpincludesstyleengineclasswpstyleenginecssrulephp"></a>
<div class="addfile"><h4 style="background-color: #eee; color: inherit; margin: 1em 0; padding: 1.3em; font-size: 115%">Added: trunk/src/wp-includes/style-engine/class-wp-style-engine-css-rule.php</h4>
<pre class="diff"><span>
<span class="info" style="display: block; padding: 0 10px; color: #888">--- trunk/src/wp-includes/style-engine/class-wp-style-engine-css-rule.php                             (rev 0)
+++ trunk/src/wp-includes/style-engine/class-wp-style-engine-css-rule.php       2022-09-14 12:46:33 UTC (rev 54156)
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -0,0 +1,139 @@
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+<?php
+/**
+ * WP_Style_Engine_CSS_Rule
+ *
+ * An object for CSS rules.
+ *
+ * @package WordPress
+ * @subpackage StyleEngine
+ * @since 6.1.0
+ */
+
+/**
+ * Class WP_Style_Engine_CSS_Rule.
+ *
+ * Holds, sanitizes, processes and prints CSS declarations for the style engine.
+ *
+ * @since 6.1.0
+ */
+class WP_Style_Engine_CSS_Rule {
+
+       /**
+        * The selector.
+        *
+        * @since 6.1.0
+        * @var string
+        */
+       protected $selector;
+
+       /**
+        * The selector declarations.
+        *
+        * Contains a WP_Style_Engine_CSS_Declarations object.
+        *
+        * @since 6.1.0
+        * @var WP_Style_Engine_CSS_Declarations
+        */
+       protected $declarations;
+
+       /**
+        * Constructor
+        *
+        * @since 6.1.0
+        *
+        * @param string                                    $selector     The CSS selector.
+        * @param string[]|WP_Style_Engine_CSS_Declarations $declarations An associative array of CSS definitions, e.g., array( "$property" => "$value", "$property" => "$value" ),
+        *                                                                or a WP_Style_Engine_CSS_Declarations object.
+        */
+       public function __construct( $selector = '', $declarations = array() ) {
+               $this->set_selector( $selector );
+               $this->add_declarations( $declarations );
+       }
+
+       /**
+        * Sets the selector.
+        *
+        * @since 6.1.0
+        *
+        * @param string $selector The CSS selector.
+        *
+        * @return WP_Style_Engine_CSS_Rule Returns the object to allow chaining of methods.
+        */
+       public function set_selector( $selector ) {
+               $this->selector = $selector;
+               return $this;
+       }
+
+       /**
+        * Sets the declarations.
+        *
+        * @since 6.1.0
+        *
+        * @param array|WP_Style_Engine_CSS_Declarations $declarations An array of declarations (property => value pairs),
+        *                                                             or a WP_Style_Engine_CSS_Declarations object.
+        *
+        * @return WP_Style_Engine_CSS_Rule Returns the object to allow chaining of methods.
+        */
+       public function add_declarations( $declarations ) {
+               $is_declarations_object = ! is_array( $declarations );
+               $declarations_array     = $is_declarations_object ? $declarations->get_declarations() : $declarations;
+
+               if ( null === $this->declarations ) {
+                       if ( $is_declarations_object ) {
+                               $this->declarations = $declarations;
+                               return $this;
+                       }
+                       $this->declarations = new WP_Style_Engine_CSS_Declarations( $declarations_array );
+               }
+               $this->declarations->add_declarations( $declarations_array );
+
+               return $this;
+       }
+
+       /**
+        * Gets the declarations object.
+        *
+        * @since 6.1.0
+        *
+        * @return WP_Style_Engine_CSS_Declarations The declarations object.
+        */
+       public function get_declarations() {
+               return $this->declarations;
+       }
+
+       /**
+        * Gets the full selector.
+        *
+        * @since 6.1.0
+        *
+        * @return string
+        */
+       public function get_selector() {
+               return $this->selector;
+       }
+
+       /**
+        * Gets the CSS.
+        *
+        * @since 6.1.0
+        *
+        * @param bool   $should_prettify Whether to add spacing, new lines and indents.
+        * @param number $indent_count    The number of tab indents to apply to the rule. Applies if `prettify` is `true`.
+        *
+        * @return string
+        */
+       public function get_css( $should_prettify = false, $indent_count = 0 ) {
+               $rule_indent         = $should_prettify ? str_repeat( "\t", $indent_count ) : '';
+               $declarations_indent = $should_prettify ? $indent_count + 1 : 0;
+               $suffix              = $should_prettify ? "\n" : '';
+               $spacer              = $should_prettify ? ' ' : '';
+               $selector            = $should_prettify ? str_replace( ',', ",\n", $this->get_selector() ) : $this->get_selector();
+               $css_declarations    = $this->declarations->get_declarations_string( $should_prettify, $declarations_indent );
+
+               if ( empty( $css_declarations ) ) {
+                       return '';
+               }
+
+               return "{$rule_indent}{$selector}{$spacer}{{$suffix}{$css_declarations}{$suffix}{$rule_indent}}";
+       }
+}
</ins><span class="cx" style="display: block; padding: 0 10px">Property changes on: trunk/src/wp-includes/style-engine/class-wp-style-engine-css-rule.php
</span><span class="cx" style="display: block; padding: 0 10px">___________________________________________________________________
</span></span></pre></div>
<a id="svneolstyle"></a>
<div class="addfile"><h4 style="background-color: #eee; color: inherit; margin: 1em 0; padding: 1.3em; font-size: 115%">Added: svn:eol-style</h4></div>
<ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+native
</ins><span class="cx" style="display: block; padding: 0 10px">\ No newline at end of property
</span><a id="trunksrcwpincludesstyleengineclasswpstyleenginecssrulesstorephp"></a>
<div class="addfile"><h4 style="background-color: #eee; color: inherit; margin: 1em 0; padding: 1.3em; font-size: 115%">Added: trunk/src/wp-includes/style-engine/class-wp-style-engine-css-rules-store.php</h4>
<pre class="diff"><span>
<span class="info" style="display: block; padding: 0 10px; color: #888">--- trunk/src/wp-includes/style-engine/class-wp-style-engine-css-rules-store.php                              (rev 0)
+++ trunk/src/wp-includes/style-engine/class-wp-style-engine-css-rules-store.php        2022-09-14 12:46:33 UTC (rev 54156)
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -0,0 +1,163 @@
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+<?php
+/**
+ * WP_Style_Engine_CSS_Rules_Store
+ *
+ * A store for WP_Style_Engine_CSS_Rule objects.
+ *
+ * @package WordPress
+ * @subpackage StyleEngine
+ * @since 6.1.0
+ */
+
+/**
+ * Class WP_Style_Engine_CSS_Rules_Store.
+ *
+ * Holds, sanitizes, processes and prints CSS declarations for the style engine.
+ *
+ * @since 6.1.0
+ */
+class WP_Style_Engine_CSS_Rules_Store {
+
+       /**
+        * An array of named WP_Style_Engine_CSS_Rules_Store objects.
+        *
+        * @static
+        *
+        * @since 6.1.0
+        * @var WP_Style_Engine_CSS_Rules_Store[]
+        */
+       protected static $stores = array();
+
+       /**
+        * The store name.
+        *
+        * @since 6.1.0
+        * @var string
+        */
+       protected $name = '';
+
+       /**
+        * An array of CSS Rules objects assigned to the store.
+        *
+        * @since 6.1.0
+        * @var WP_Style_Engine_CSS_Rule[]
+        */
+       protected $rules = array();
+
+       /**
+        * Gets an instance of the store.
+        *
+        * @since 6.1.0
+        *
+        * @param string $store_name The name of the store.
+        *
+        * @return WP_Style_Engine_CSS_Rules_Store|void
+        */
+       public static function get_store( $store_name = 'default' ) {
+               if ( ! is_string( $store_name ) || empty( $store_name ) ) {
+                       return;
+               }
+               if ( ! isset( static::$stores[ $store_name ] ) ) {
+                       static::$stores[ $store_name ] = new static();
+                       // Set the store name.
+                       static::$stores[ $store_name ]->set_name( $store_name );
+               }
+               return static::$stores[ $store_name ];
+       }
+
+       /**
+        * Gets an array of all available stores.
+        *
+        * @since 6.1.0
+        *
+        * @return WP_Style_Engine_CSS_Rules_Store[]
+        */
+       public static function get_stores() {
+               return static::$stores;
+       }
+
+       /**
+        * Clears all stores from static::$stores.
+        *
+        * @since 6.1.0
+        *
+        * @return void
+        */
+       public static function remove_all_stores() {
+               static::$stores = array();
+       }
+
+       /**
+        * Sets the store name.
+        *
+        * @since 6.1.0
+        *
+        * @param string $name The store name.
+        *
+        * @return void
+        */
+       public function set_name( $name ) {
+               $this->name = $name;
+       }
+
+       /**
+        * Gets the store name.
+        *
+        * @since 6.1.0
+        *
+        * @return string
+        */
+       public function get_name() {
+               return $this->name;
+       }
+
+       /**
+        * Gets an array of all rules.
+        *
+        * @since 6.1.0
+        *
+        * @return WP_Style_Engine_CSS_Rule[]
+        */
+       public function get_all_rules() {
+               return $this->rules;
+       }
+
+       /**
+        * Gets a WP_Style_Engine_CSS_Rule object by its selector.
+        * If the rule does not exist, it will be created.
+        *
+        * @since 6.1.0
+        *
+        * @param string $selector The CSS selector.
+        *
+        * @return WP_Style_Engine_CSS_Rule|void Returns a WP_Style_Engine_CSS_Rule object, or null if the selector is empty.
+        */
+       public function add_rule( $selector ) {
+               $selector = trim( $selector );
+
+               // Bail early if there is no selector.
+               if ( empty( $selector ) ) {
+                       return;
+               }
+
+               // Create the rule if it doesn't exist.
+               if ( empty( $this->rules[ $selector ] ) ) {
+                       $this->rules[ $selector ] = new WP_Style_Engine_CSS_Rule( $selector );
+               }
+
+               return $this->rules[ $selector ];
+       }
+
+       /**
+        * Removes a selector from the store.
+        *
+        * @since 6.1.0
+        *
+        * @param string $selector The CSS selector.
+        *
+        * @return void
+        */
+       public function remove_rule( $selector ) {
+               unset( $this->rules[ $selector ] );
+       }
+}
</ins><span class="cx" style="display: block; padding: 0 10px">Property changes on: trunk/src/wp-includes/style-engine/class-wp-style-engine-css-rules-store.php
</span><span class="cx" style="display: block; padding: 0 10px">___________________________________________________________________
</span></span></pre></div>
<a id="svneolstyle"></a>
<div class="addfile"><h4 style="background-color: #eee; color: inherit; margin: 1em 0; padding: 1.3em; font-size: 115%">Added: svn:eol-style</h4></div>
<ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+native
</ins><span class="cx" style="display: block; padding: 0 10px">\ No newline at end of property
</span><a id="trunksrcwpincludesstyleengineclasswpstyleengineprocessorphp"></a>
<div class="addfile"><h4 style="background-color: #eee; color: inherit; margin: 1em 0; padding: 1.3em; font-size: 115%">Added: trunk/src/wp-includes/style-engine/class-wp-style-engine-processor.php</h4>
<pre class="diff"><span>
<span class="info" style="display: block; padding: 0 10px; color: #888">--- trunk/src/wp-includes/style-engine/class-wp-style-engine-processor.php                            (rev 0)
+++ trunk/src/wp-includes/style-engine/class-wp-style-engine-processor.php      2022-09-14 12:46:33 UTC (rev 54156)
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -0,0 +1,165 @@
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+<?php
+/**
+ * WP_Style_Engine_Processor
+ *
+ * Compiles styles from stores or collection of CSS rules.
+ *
+ * @package WordPress
+ * @subpackage StyleEngine
+ * @since 6.1.0
+ */
+
+/**
+ * Class WP_Style_Engine_Processor.
+ *
+ * Compiles styles from stores or collection of CSS rules.
+ *
+ * @since 6.1.0
+ */
+class WP_Style_Engine_Processor {
+
+       /**
+        * A collection of Style Engine Store objects.
+        *
+        * @since 6.1.0
+        * @var WP_Style_Engine_CSS_Rules_Store[]
+        */
+       protected $stores = array();
+
+       /**
+        * The set of CSS rules that this processor will work on.
+        *
+        * @since 6.1.0
+        * @var WP_Style_Engine_CSS_Rule[]
+        */
+       protected $css_rules = array();
+
+       /**
+        * Adds a store to the processor.
+        *
+        * @since 6.1.0
+        *
+        * @param WP_Style_Engine_CSS_Rules_Store $store The store to add.
+        *
+        * @return WP_Style_Engine_Processor Returns the object to allow chaining methods.
+        */
+       public function add_store( $store ) {
+               if ( ! $store instanceof WP_Style_Engine_CSS_Rules_Store ) {
+                       _doing_it_wrong(
+                               __METHOD__,
+                               __( '$store must be an instance of WP_Style_Engine_CSS_Rules_Store' ),
+                               '6.1.0'
+                       );
+                       return $this;
+               }
+
+               $this->stores[ $store->get_name() ] = $store;
+
+               return $this;
+       }
+
+       /**
+        * Adds rules to be processed.
+        *
+        * @since 6.1.0
+        *
+        * @param WP_Style_Engine_CSS_Rule|WP_Style_Engine_CSS_Rule[] $css_rules A single, or an array of, WP_Style_Engine_CSS_Rule objects from a store or otherwise.
+        *
+        * @return WP_Style_Engine_Processor Returns the object to allow chaining methods.
+        */
+       public function add_rules( $css_rules ) {
+               if ( ! is_array( $css_rules ) ) {
+                       $css_rules = array( $css_rules );
+               }
+
+               foreach ( $css_rules as $rule ) {
+                       $selector = $rule->get_selector();
+                       if ( isset( $this->css_rules[ $selector ] ) ) {
+                               $this->css_rules[ $selector ]->add_declarations( $rule->get_declarations() );
+                               continue;
+                       }
+                       $this->css_rules[ $rule->get_selector() ] = $rule;
+               }
+
+               return $this;
+       }
+
+       /**
+        * Gets the CSS rules as a string.
+        *
+        * @since 6.1.0
+        *
+        * @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 is `false`.
+        *     @type bool $prettify Whether to add new lines and indents to output. Default is the test of whether the global constant `SCRIPT_DEBUG` is defined.
+        * }
+        *
+        * @return string The computed CSS.
+        */
+       public function get_css( $options = array() ) {
+               $defaults = array(
+                       'optimize' => true,
+                       'prettify' => defined( 'SCRIPT_DEBUG' ) && SCRIPT_DEBUG,
+               );
+               $options  = wp_parse_args( $options, $defaults );
+
+               // If we have stores, get the rules from them.
+               foreach ( $this->stores as $store ) {
+                       $this->add_rules( $store->get_all_rules() );
+               }
+
+               // Combine CSS selectors that have identical declarations.
+               if ( true === $options['optimize'] ) {
+                       $this->combine_rules_selectors();
+               }
+
+               // Build the CSS.
+               $css = '';
+               foreach ( $this->css_rules as $rule ) {
+                       $css .= $rule->get_css( $options['prettify'] );
+                       $css .= $options['prettify'] ? "\n" : '';
+               }
+               return $css;
+       }
+
+       /**
+        * Combines selectors from the rules store when they have the same styles.
+        *
+        * @since 6.1.0
+        *
+        * @return void
+        */
+       private function combine_rules_selectors() {
+               // Build an array of selectors along with the JSON-ified styles to make comparisons easier.
+               $selectors_json = array();
+               foreach ( $this->css_rules as $rule ) {
+                       $declarations = $rule->get_declarations()->get_declarations();
+                       ksort( $declarations );
+                       $selectors_json[ $rule->get_selector() ] = wp_json_encode( $declarations );
+               }
+
+               // Combine selectors that have the same styles.
+               foreach ( $selectors_json as $selector => $json ) {
+                       // Get selectors that use the same styles.
+                       $duplicates = array_keys( $selectors_json, $json, true );
+                       // Skip if there are no duplicates.
+                       if ( 1 >= count( $duplicates ) ) {
+                               continue;
+                       }
+
+                       $declarations = $this->css_rules[ $selector ]->get_declarations();
+
+                       foreach ( $duplicates as $key ) {
+                               // Unset the duplicates from the $selectors_json array to avoid looping through them as well.
+                               unset( $selectors_json[ $key ] );
+                               // Remove the rules from the rules collection.
+                               unset( $this->css_rules[ $key ] );
+                       }
+                       // Create a new rule with the combined selectors.
+                       $duplicate_selectors                     = implode( ',', $duplicates );
+                       $this->css_rules[ $duplicate_selectors ] = new WP_Style_Engine_CSS_Rule( $duplicate_selectors, $declarations );
+               }
+       }
+}
</ins><span class="cx" style="display: block; padding: 0 10px">Property changes on: trunk/src/wp-includes/style-engine/class-wp-style-engine-processor.php
</span><span class="cx" style="display: block; padding: 0 10px">___________________________________________________________________
</span></span></pre></div>
<a id="svneolstyle"></a>
<div class="addfile"><h4 style="background-color: #eee; color: inherit; margin: 1em 0; padding: 1.3em; font-size: 115%">Added: svn:eol-style</h4></div>
<ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+native
</ins><span class="cx" style="display: block; padding: 0 10px">\ No newline at end of property
</span><a id="trunksrcwpincludesstyleengineclasswpstyleenginephp"></a>
<div class="addfile"><h4 style="background-color: #eee; color: inherit; margin: 1em 0; padding: 1.3em; font-size: 115%">Added: trunk/src/wp-includes/style-engine/class-wp-style-engine.php</h4>
<pre class="diff"><span>
<span class="info" style="display: block; padding: 0 10px; color: #888">--- trunk/src/wp-includes/style-engine/class-wp-style-engine.php                              (rev 0)
+++ trunk/src/wp-includes/style-engine/class-wp-style-engine.php        2022-09-14 12:46:33 UTC (rev 54156)
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -0,0 +1,560 @@
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+<?php
+/**
+ * StyleEngine: WP_Style_Engine class
+ *
+ * This is the main class integrating all other WP_Style_Engine_* classes.
+ *
+ * @package WordPress
+ * @subpackage StyleEngine
+ * @since 6.1.0
+ */
+
+/**
+ * Class WP_Style_Engine.
+ *
+ * The Style Engine aims to provide a consistent API for rendering styling for blocks across both client-side and server-side applications.
+ *
+ * This class is for internal Core usage and is not supposed to be used by extenders (plugins and/or themes).
+ * This is a low-level API that may need to do breaking changes. Please, use wp_style_engine_get_styles instead.
+ *
+ * @access private
+ * @since 6.1.0
+ */
+class WP_Style_Engine {
+       /**
+        * Style definitions that contain the instructions to
+        * parse/output valid Gutenberg styles from a block's attributes.
+        * For every style definition, the follow properties are valid:
+        *  - classnames    => (array) an array of classnames to be returned for block styles. The key is a classname or pattern.
+        *                    A value of `true` means the classname should be applied always. Otherwise, a valid CSS property (string)
+        *                    to match the incoming value, e.g., "color" to match var:preset|color|somePresetSlug.
+        *  - css_vars      => (array) an array of key value pairs used to generate CSS var values. The key is a CSS var pattern, whose `$slug` fragment will be replaced with a preset slug.
+        *                    The value should be a valid CSS property (string) to match the incoming value, e.g., "color" to match var:preset|color|somePresetSlug.
+        *  - property_keys => (array) array of keys whose values represent a valid CSS property, e.g., "margin" or "border".
+        *  - path          => (array) a path that accesses the corresponding style value in the block style object.
+        *  - value_func    => (string) the name of a function to generate a CSS definition array for a particular style object. The output of this function should be `array( "$property" => "$value", ... )`.
+        *
+        * @since 6.1.0
+        * @var array
+        */
+       const BLOCK_STYLE_DEFINITIONS_METADATA = array(
+               'color'      => array(
+                       'text'       => array(
+                               'property_keys' => array(
+                                       'default' => 'color',
+                               ),
+                               'path'          => array( 'color', 'text' ),
+                               'css_vars'      => array(
+                                       'color' => '--wp--preset--color--$slug',
+                               ),
+                               'classnames'    => array(
+                                       'has-text-color'  => true,
+                                       'has-$slug-color' => 'color',
+                               ),
+                       ),
+                       'background' => array(
+                               'property_keys' => array(
+                                       'default' => 'background-color',
+                               ),
+                               'path'          => array( 'color', 'background' ),
+                               'classnames'    => array(
+                                       'has-background'             => true,
+                                       'has-$slug-background-color' => 'color',
+                               ),
+                       ),
+                       'gradient'   => array(
+                               'property_keys' => array(
+                                       'default' => 'background',
+                               ),
+                               'path'          => array( 'color', 'gradient' ),
+                               'classnames'    => array(
+                                       'has-background'                => true,
+                                       'has-$slug-gradient-background' => 'gradient',
+                               ),
+                       ),
+               ),
+               'border'     => array(
+                       'color'  => array(
+                               'property_keys' => array(
+                                       'default'    => 'border-color',
+                                       'individual' => 'border-%s-color',
+                               ),
+                               'path'          => array( 'border', 'color' ),
+                               'classnames'    => array(
+                                       'has-border-color'       => true,
+                                       'has-$slug-border-color' => 'color',
+                               ),
+                       ),
+                       'radius' => array(
+                               'property_keys' => array(
+                                       'default'    => 'border-radius',
+                                       'individual' => 'border-%s-radius',
+                               ),
+                               'path'          => array( 'border', 'radius' ),
+                       ),
+                       'style'  => array(
+                               'property_keys' => array(
+                                       'default'    => 'border-style',
+                                       'individual' => 'border-%s-style',
+                               ),
+                               'path'          => array( 'border', 'style' ),
+                       ),
+                       'width'  => array(
+                               'property_keys' => array(
+                                       'default'    => 'border-width',
+                                       'individual' => 'border-%s-width',
+                               ),
+                               'path'          => array( 'border', 'width' ),
+                       ),
+                       'top'    => array(
+                               'value_func' => 'static::get_individual_property_css_declarations',
+                               'path'       => array( 'border', 'top' ),
+                               'css_vars'   => array(
+                                       'color' => '--wp--preset--color--$slug',
+                               ),
+                       ),
+                       'right'  => array(
+                               'value_func' => 'static::get_individual_property_css_declarations',
+                               'path'       => array( 'border', 'right' ),
+                               'css_vars'   => array(
+                                       'color' => '--wp--preset--color--$slug',
+                               ),
+                       ),
+                       'bottom' => array(
+                               'value_func' => 'static::get_individual_property_css_declarations',
+                               'path'       => array( 'border', 'bottom' ),
+                               'css_vars'   => array(
+                                       'color' => '--wp--preset--color--$slug',
+                               ),
+                       ),
+                       'left'   => array(
+                               'value_func' => 'static::get_individual_property_css_declarations',
+                               'path'       => array( 'border', 'left' ),
+                               'css_vars'   => array(
+                                       'color' => '--wp--preset--color--$slug',
+                               ),
+                       ),
+               ),
+               'spacing'    => array(
+                       'padding' => array(
+                               'property_keys' => array(
+                                       'default'    => 'padding',
+                                       'individual' => 'padding-%s',
+                               ),
+                               'path'          => array( 'spacing', 'padding' ),
+                               'css_vars'      => array(
+                                       'spacing' => '--wp--preset--spacing--$slug',
+                               ),
+                       ),
+                       'margin'  => array(
+                               'property_keys' => array(
+                                       'default'    => 'margin',
+                                       'individual' => 'margin-%s',
+                               ),
+                               'path'          => array( 'spacing', 'margin' ),
+                               'css_vars'      => array(
+                                       'spacing' => '--wp--preset--spacing--$slug',
+                               ),
+                       ),
+               ),
+               'typography' => array(
+                       'fontSize'       => array(
+                               'property_keys' => array(
+                                       'default' => 'font-size',
+                               ),
+                               'path'          => array( 'typography', 'fontSize' ),
+                               'classnames'    => array(
+                                       'has-$slug-font-size' => 'font-size',
+                               ),
+                       ),
+                       'fontFamily'     => array(
+                               'property_keys' => array(
+                                       'default' => 'font-family',
+                               ),
+                               'path'          => array( 'typography', 'fontFamily' ),
+                               'classnames'    => array(
+                                       'has-$slug-font-family' => 'font-family',
+                               ),
+                       ),
+                       'fontStyle'      => array(
+                               'property_keys' => array(
+                                       'default' => 'font-style',
+                               ),
+                               'path'          => array( 'typography', 'fontStyle' ),
+                       ),
+                       'fontWeight'     => array(
+                               'property_keys' => array(
+                                       'default' => 'font-weight',
+                               ),
+                               'path'          => array( 'typography', 'fontWeight' ),
+                       ),
+                       'lineHeight'     => array(
+                               'property_keys' => array(
+                                       'default' => 'line-height',
+                               ),
+                               'path'          => array( 'typography', 'lineHeight' ),
+                       ),
+                       'textDecoration' => array(
+                               'property_keys' => array(
+                                       'default' => 'text-decoration',
+                               ),
+                               'path'          => array( 'typography', 'textDecoration' ),
+                       ),
+                       'textTransform'  => array(
+                               'property_keys' => array(
+                                       'default' => 'text-transform',
+                               ),
+                               'path'          => array( 'typography', 'textTransform' ),
+                       ),
+                       'letterSpacing'  => array(
+                               'property_keys' => array(
+                                       'default' => 'letter-spacing',
+                               ),
+                               'path'          => array( 'typography', 'letterSpacing' ),
+                       ),
+               ),
+       );
+
+       /**
+        * Util: Extracts the slug in kebab case from a preset string, e.g., "heavenly-blue" from 'var:preset|color|heavenlyBlue'.
+        *
+        * @since 6.1.0
+        *
+        * @param string $style_value  A single CSS preset value.
+        * @param string $property_key The CSS property that is the second element of the preset string. Used for matching.
+        *
+        * @return string The slug, or empty string if not found.
+        */
+       protected static function get_slug_from_preset_value( $style_value, $property_key ) {
+               if ( is_string( $style_value ) && is_string( $property_key ) && str_contains( $style_value, "var:preset|{$property_key}|" ) ) {
+                       $index_to_splice = strrpos( $style_value, '|' ) + 1;
+                       return _wp_to_kebab_case( substr( $style_value, $index_to_splice ) );
+               }
+               return '';
+       }
+
+       /**
+        * Util: Generates a CSS var string, e.g., var(--wp--preset--color--background) from a preset string such as `var:preset|space|50`.
+        *
+        * @since 6.1.0
+        *
+        * @param string   $style_value  A single css preset value.
+        * @param string[] $css_vars     An associate array of css var patterns used to generate the var string.
+        *
+        * @return string The css var, or an empty string if no match for slug found.
+        */
+       protected static function get_css_var_value( $style_value, $css_vars ) {
+               foreach ( $css_vars as  $property_key => $css_var_pattern ) {
+                       $slug = static::get_slug_from_preset_value( $style_value, $property_key );
+                       if ( static::is_valid_style_value( $slug ) ) {
+                               $var = strtr(
+                                       $css_var_pattern,
+                                       array( '$slug' => $slug )
+                               );
+                               return "var($var)";
+                       }
+               }
+               return '';
+       }
+
+       /**
+        * Util: Checks whether an incoming block style value is valid.
+        *
+        * @since 6.1.0
+        *
+        * @param string $style_value A single CSS preset value.
+        *
+        * @return bool
+        */
+       protected static function is_valid_style_value( $style_value ) {
+               return '0' === $style_value || ! empty( $style_value );
+       }
+
+       /**
+        * Stores a CSS rule using the provided CSS selector and CSS declarations.
+        *
+        * @since 6.1.0
+        *
+        * @param string   $store_name       A valid store key.
+        * @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.
+        * @param string[] $css_declarations An associative array of CSS definitions, e.g., array( "$property" => "$value", "$property" => "$value" ).
+        *
+        * @return void.
+        */
+       public static function store_css_rule( $store_name, $css_selector, $css_declarations ) {
+               if ( empty( $store_name ) || empty( $css_selector ) || empty( $css_declarations ) ) {
+                       return;
+               }
+               static::get_store( $store_name )->add_rule( $css_selector )->add_declarations( $css_declarations );
+       }
+
+       /**
+        * Returns a store by store key.
+        *
+        * @since 6.1.0
+        *
+        * @param string $store_name A store key.
+        *
+        * @return WP_Style_Engine_CSS_Rules_Store
+        */
+       public static function get_store( $store_name ) {
+               return WP_Style_Engine_CSS_Rules_Store::get_store( $store_name );
+       }
+
+       /**
+        * Returns classnames and CSS based on the values in a styles object.
+        * Return values are parsed based on the instructions in BLOCK_STYLE_DEFINITIONS_METADATA.
+        *
+        * @since 6.1.0
+        *
+        * @param array $block_styles The style object.
+        * @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`.
+        *     @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   $classnames   Classnames separated by a space.
+        *     @type string[] $declarations An associative array of CSS definitions, e.g., array( "$property" => "$value", "$property" => "$value" ).
+        * }
+        */
+       public static function parse_block_styles( $block_styles, $options ) {
+               $parsed_styles = array(
+                       'classnames'   => array(),
+                       'declarations' => array(),
+               );
+               if ( empty( $block_styles ) || ! is_array( $block_styles ) ) {
+                       return $parsed_styles;
+               }
+
+               // Collect CSS and classnames.
+               foreach ( static::BLOCK_STYLE_DEFINITIONS_METADATA as $definition_group_key => $definition_group_style ) {
+                       if ( empty( $block_styles[ $definition_group_key ] ) ) {
+                               continue;
+                       }
+                       foreach ( $definition_group_style as $style_definition ) {
+                               $style_value = _wp_array_get( $block_styles, $style_definition['path'], null );
+
+                               if ( ! static::is_valid_style_value( $style_value ) ) {
+                                       continue;
+                               }
+
+                               $parsed_styles['classnames']   = array_merge( $parsed_styles['classnames'], static::get_classnames( $style_value, $style_definition ) );
+                               $parsed_styles['declarations'] = array_merge( $parsed_styles['declarations'], static::get_css_declarations( $style_value, $style_definition, $options ) );
+                       }
+               }
+
+               return $parsed_styles;
+       }
+
+       /**
+        * Returns classnames, and generates classname(s) from a CSS preset property pattern, e.g., '`var:preset|<PRESET_TYPE>|<PRESET_SLUG>`'.
+        *
+        * @since 6.1.0
+        *
+        * @param array $style_value      A single raw style value or css preset property from the $block_styles array.
+        * @param array $style_definition A single style definition from BLOCK_STYLE_DEFINITIONS_METADATA.
+        *
+        * @return array|string[] An array of CSS classnames, or empty array.
+        */
+       protected static function get_classnames( $style_value, $style_definition ) {
+               if ( empty( $style_value ) ) {
+                       return array();
+               }
+
+               $classnames = array();
+               if ( ! empty( $style_definition['classnames'] ) ) {
+                       foreach ( $style_definition['classnames'] as $classname => $property_key ) {
+                               if ( true === $property_key ) {
+                                       $classnames[] = $classname;
+                               }
+
+                               $slug = static::get_slug_from_preset_value( $style_value, $property_key );
+
+                               if ( $slug ) {
+                                       /*
+                                        * Right now we expect a classname pattern to be stored in BLOCK_STYLE_DEFINITIONS_METADATA.
+                                        * One day, if there are no stored schemata, we could allow custom patterns or
+                                        * generate classnames based on other properties
+                                        * such as a path or a value or a prefix passed in options.
+                                        */
+                                       $classnames[] = strtr( $classname, array( '$slug' => $slug ) );
+                               }
+                       }
+               }
+
+               return $classnames;
+       }
+
+       /**
+        * Returns an array of CSS declarations based on valid block style values.
+        *
+        * @since 6.1.0
+        *
+        * @param array $style_value      A single raw style value from $block_styles array.
+        * @param array $style_definition A single style definition from BLOCK_STYLE_DEFINITIONS_METADATA.
+        * @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_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 $css_declarations;
+       }
+
+       /**
+        * Style value parser that returns a CSS definition array comprising style properties
+        * that have keys representing individual style properties, otherwise known as longhand CSS properties.
+        * e.g., "$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 bool $optimize Whether to optimize the CSS output, e.g., combine rules. Default is `false`.
+        *     @type bool $prettify Whether to add new lines and indents to output. Default is the test of whether the global constant `SCRIPT_DEBUG` 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 );
+       }
+}
</ins><span class="cx" style="display: block; padding: 0 10px">Property changes on: trunk/src/wp-includes/style-engine/class-wp-style-engine.php
</span><span class="cx" style="display: block; padding: 0 10px">___________________________________________________________________
</span></span></pre></div>
<a id="svneolstyle"></a>
<div class="addfile"><h4 style="background-color: #eee; color: inherit; margin: 1em 0; padding: 1.3em; font-size: 115%">Added: svn:eol-style</h4></div>
<ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+native
</ins><span class="cx" style="display: block; padding: 0 10px">\ No newline at end of property
</span><a id="trunksrcwpincludesstyleenginephp"></a>
<div class="addfile"><h4 style="background-color: #eee; color: inherit; margin: 1em 0; padding: 1.3em; font-size: 115%">Added: trunk/src/wp-includes/style-engine.php</h4>
<pre class="diff"><span>
<span class="info" style="display: block; padding: 0 10px; color: #888">--- trunk/src/wp-includes/style-engine.php                            (rev 0)
+++ trunk/src/wp-includes/style-engine.php      2022-09-14 12:46:33 UTC (rev 54156)
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -0,0 +1,154 @@
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+<?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.
+ * See: https://developer.wordpress.org/block-editor/reference-guides/theme-json-reference/theme-json-living/#styles and
+ * https://developer.wordpress.org/block-editor/reference-guides/block-api/block-supports/
+ *
+ * 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' )`.
+ *
+ * @access public
+ * @since 6.1.0
+ *
+ * @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 is `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
+ *
+ * @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 is '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 is `false`.
+ *     @type bool        $prettify Whether to add new lines and indents to output. Default is the test of whether the global constant `SCRIPT_DEBUG` 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;
+               }
+
+               if ( ! empty( $options['context'] ) ) {
+                       WP_Style_Engine::store_css_rule( $options['context'], $css_rule['selector'], $css_rule['declarations'] );
+               }
+
+               $css_rule_objects[] = new WP_Style_Engine_CSS_Rule( $css_rule['selector'], $css_rule['declarations'] );
+       }
+
+       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 is `false`.
+ *     @type bool $prettify Whether to add new lines and indents to output. Default is the test of whether the global constant `SCRIPT_DEBUG` 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 );
+}
</ins><span class="cx" style="display: block; padding: 0 10px">Property changes on: trunk/src/wp-includes/style-engine.php
</span><span class="cx" style="display: block; padding: 0 10px">___________________________________________________________________
</span></span></pre></div>
<a id="svneolstyle"></a>
<div class="addfile"><h4 style="background-color: #eee; color: inherit; margin: 1em 0; padding: 1.3em; font-size: 115%">Added: svn:eol-style</h4></div>
<ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+native
</ins><span class="cx" style="display: block; padding: 0 10px">\ No newline at end of property
</span><a id="trunksrcwpsettingsphp"></a>
<div class="modfile"><h4 style="background-color: #eee; color: inherit; margin: 1em 0; padding: 1.3em; font-size: 115%">Modified: trunk/src/wp-settings.php</h4>
<pre class="diff"><span>
<span class="info" style="display: block; padding: 0 10px; color: #888">--- trunk/src/wp-settings.php 2022-09-14 10:50:26 UTC (rev 54155)
+++ trunk/src/wp-settings.php   2022-09-14 12:46:33 UTC (rev 54156)
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -332,6 +332,12 @@
</span><span class="cx" style="display: block; padding: 0 10px"> require ABSPATH . WPINC . '/block-supports/layout.php';
</span><span class="cx" style="display: block; padding: 0 10px"> require ABSPATH . WPINC . '/block-supports/spacing.php';
</span><span class="cx" style="display: block; padding: 0 10px"> require ABSPATH . WPINC . '/block-supports/typography.php';
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+require ABSPATH . WPINC . '/style-engine.php';
+require ABSPATH . WPINC . '/style-engine/class-wp-style-engine.php';
+require ABSPATH . WPINC . '/style-engine/class-wp-style-engine-css-declarations.php';
+require ABSPATH . WPINC . '/style-engine/class-wp-style-engine-css-rule.php';
+require ABSPATH . WPINC . '/style-engine/class-wp-style-engine-css-rules-store.php';
+require ABSPATH . WPINC . '/style-engine/class-wp-style-engine-processor.php';
</ins><span class="cx" style="display: block; padding: 0 10px"> 
</span><span class="cx" style="display: block; padding: 0 10px"> $GLOBALS['wp_embed'] = new WP_Embed();
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span></span></pre></div>
<a id="trunktestsphpunittestsstyleenginestyleEnginephp"></a>
<div class="addfile"><h4 style="background-color: #eee; color: inherit; margin: 1em 0; padding: 1.3em; font-size: 115%">Added: trunk/tests/phpunit/tests/style-engine/styleEngine.php</h4>
<pre class="diff"><span>
<span class="info" style="display: block; padding: 0 10px; color: #888">--- trunk/tests/phpunit/tests/style-engine/styleEngine.php                            (rev 0)
+++ trunk/tests/phpunit/tests/style-engine/styleEngine.php      2022-09-14 12:46:33 UTC (rev 54156)
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -0,0 +1,670 @@
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+<?php
+/**
+ * Tests the Style Engine global functions that interact with the WP_Style_Engine class.
+ *
+ * @package WordPress
+ * @subpackage StyleEngine
+ * @since 6.1.0
+ *
+ * @group style-engine
+ */
+
+/**
+ * Tests for registering, storing and generating styles.
+ */
+class Tests_wpStyleEngine extends WP_UnitTestCase {
+       /**
+        * Cleans up stores after each test.
+        */
+       public function tear_down() {
+               WP_Style_Engine_CSS_Rules_Store::remove_all_stores();
+               parent::tear_down();
+       }
+
+       /**
+        * Tests generating block styles and classnames based on various manifestations of the $block_styles argument.
+        *
+        * @ticket 56467
+        *
+        * @covers ::wp_style_engine_get_styles
+        *
+        * @dataProvider data_wp_style_engine_get_styles
+        *
+        * @param array  $block_styles    The incoming block styles object.
+        * @param array  $options         {
+        *     An array of options to pass to `wp_style_engine_get_styles()`.
+        *
+        *     @type string|null $context                    An identifier describing the origin of the style object, e.g., 'block-supports' or 'global-styles'. Default is `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.
+        * }
+        * @param string $expected_output The expected output.
+        */
+       public function test_wp_style_engine_get_styles( $block_styles, $options, $expected_output ) {
+               $generated_styles = wp_style_engine_get_styles( $block_styles, $options );
+
+               $this->assertSame( $expected_output, $generated_styles );
+       }
+
+       /**
+        * Data provider for test_wp_style_engine_get_styles().
+        *
+        * @return array
+        */
+       public function data_wp_style_engine_get_styles() {
+               return array(
+                       'default_return_value'                         => array(
+                               'block_styles'    => array(),
+                               'options'         => null,
+                               'expected_output' => array(),
+                       ),
+
+                       'inline_invalid_block_styles_empty'            => array(
+                               'block_styles'    => 'hello world!',
+                               'options'         => null,
+                               'expected_output' => array(),
+                       ),
+
+                       'inline_invalid_block_styles_unknown_style'    => array(
+                               'block_styles'    => array(
+                                       'pageBreakAfter' => 'verso',
+                               ),
+                               'options'         => null,
+                               'expected_output' => array(),
+                       ),
+
+                       'inline_invalid_block_styles_unknown_definition' => array(
+                               'block_styles'    => array(
+                                       'pageBreakAfter' => 'verso',
+                               ),
+                               'options'         => null,
+                               'expected_output' => array(),
+                       ),
+
+                       'inline_invalid_block_styles_unknown_property' => array(
+                               'block_styles'    => array(
+                                       'spacing' => array(
+                                               'gap' => '1000vw',
+                                       ),
+                               ),
+                               'options'         => null,
+                               'expected_output' => array(),
+                       ),
+
+                       'valid_inline_css_and_classnames_as_default_context' => array(
+                               'block_styles'    => array(
+                                       'color'   => array(
+                                               'text' => 'var:preset|color|texas-flood',
+                                       ),
+                                       'spacing' => array(
+                                               'margin'  => '111px',
+                                               'padding' => '0',
+                                       ),
+                                       'border'  => array(
+                                               'color' => 'var:preset|color|cool-caramel',
+                                               'width' => '2rem',
+                                               'style' => 'dotted',
+                                       ),
+                               ),
+                               'options'         => array( 'convert_vars_to_classnames' => true ),
+                               'expected_output' => array(
+                                       'css'          => 'border-style:dotted;border-width:2rem;padding:0;margin:111px;',
+                                       'declarations' => array(
+                                               'border-style' => 'dotted',
+                                               'border-width' => '2rem',
+                                               'padding'      => '0',
+                                               'margin'       => '111px',
+                                       ),
+                                       'classnames'   => 'has-text-color has-texas-flood-color has-border-color has-cool-caramel-border-color',
+                               ),
+                       ),
+
+                       'inline_valid_box_model_style'                 => array(
+                               'block_styles'    => array(
+                                       'spacing' => array(
+                                               'padding' => array(
+                                                       'top'    => '42px',
+                                                       'left'   => '2%',
+                                                       'bottom' => '44px',
+                                                       'right'  => '5rem',
+                                               ),
+                                               'margin'  => array(
+                                                       'top'    => '12rem',
+                                                       'left'   => '2vh',
+                                                       'bottom' => '2px',
+                                                       'right'  => '10em',
+                                               ),
+                                       ),
+                                       'border'  => array(
+                                               'radius' => array(
+                                                       'topLeft'     => '99px',
+                                                       'topRight'    => '98px',
+                                                       'bottomLeft'  => '97px',
+                                                       'bottomRight' => '96px',
+                                               ),
+                                       ),
+                               ),
+                               'options'         => null,
+                               'expected_output' => array(
+                                       'css'          => 'border-top-left-radius:99px;border-top-right-radius:98px;border-bottom-left-radius:97px;border-bottom-right-radius:96px;padding-top:42px;padding-left:2%;padding-bottom:44px;padding-right:5rem;margin-top:12rem;margin-left:2vh;margin-bottom:2px;margin-right:10em;',
+                                       'declarations' => array(
+                                               'border-top-left-radius'     => '99px',
+                                               'border-top-right-radius'    => '98px',
+                                               'border-bottom-left-radius'  => '97px',
+                                               'border-bottom-right-radius' => '96px',
+                                               'padding-top'                => '42px',
+                                               'padding-left'               => '2%',
+                                               'padding-bottom'             => '44px',
+                                               'padding-right'              => '5rem',
+                                               'margin-top'                 => '12rem',
+                                               'margin-left'                => '2vh',
+                                               'margin-bottom'              => '2px',
+                                               'margin-right'               => '10em',
+                                       ),
+                               ),
+                       ),
+
+                       'inline_valid_typography_style'                => array(
+                               'block_styles'    => array(
+                                       'typography' => array(
+                                               'fontSize'       => 'clamp(2em, 2vw, 4em)',
+                                               'fontFamily'     => 'Roboto,Oxygen-Sans,Ubuntu,sans-serif',
+                                               'fontStyle'      => 'italic',
+                                               'fontWeight'     => '800',
+                                               'lineHeight'     => '1.3',
+                                               'textDecoration' => 'underline',
+                                               'textTransform'  => 'uppercase',
+                                               'letterSpacing'  => '2',
+                                       ),
+                               ),
+                               'options'         => null,
+                               'expected_output' => array(
+                                       'css'          => 'font-size:clamp(2em, 2vw, 4em);font-family:Roboto,Oxygen-Sans,Ubuntu,sans-serif;font-style:italic;font-weight:800;line-height:1.3;text-decoration:underline;text-transform:uppercase;letter-spacing:2;',
+                                       'declarations' => array(
+                                               'font-size'       => 'clamp(2em, 2vw, 4em)',
+                                               'font-family'     => 'Roboto,Oxygen-Sans,Ubuntu,sans-serif',
+                                               'font-style'      => 'italic',
+                                               'font-weight'     => '800',
+                                               'line-height'     => '1.3',
+                                               'text-decoration' => 'underline',
+                                               'text-transform'  => 'uppercase',
+                                               'letter-spacing'  => '2',
+                                       ),
+                               ),
+                       ),
+
+                       'style_block_with_selector'                    => array(
+                               'block_styles'    => array(
+                                       'spacing' => array(
+                                               'padding' => array(
+                                                       'top'    => '42px',
+                                                       'left'   => '2%',
+                                                       'bottom' => '44px',
+                                                       'right'  => '5rem',
+                                               ),
+                                       ),
+                               ),
+                               'options'         => array( 'selector' => '.wp-selector > p' ),
+                               'expected_output' => array(
+                                       'css'          => '.wp-selector > p{padding-top:42px;padding-left:2%;padding-bottom:44px;padding-right:5rem;}',
+                                       'declarations' => array(
+                                               'padding-top'    => '42px',
+                                               'padding-left'   => '2%',
+                                               'padding-bottom' => '44px',
+                                               'padding-right'  => '5rem',
+                                       ),
+                               ),
+                       ),
+
+                       'elements_with_css_var_value'                  => array(
+                               'block_styles'    => array(
+                                       'color' => array(
+                                               'text' => 'var:preset|color|my-little-pony',
+                                       ),
+                               ),
+                               'options'         => array(
+                                       'selector' => '.wp-selector',
+                               ),
+                               'expected_output' => array(
+                                       'css'          => '.wp-selector{color:var(--wp--preset--color--my-little-pony);}',
+                                       'declarations' => array(
+                                               'color' => 'var(--wp--preset--color--my-little-pony)',
+                                       ),
+                                       'classnames'   => 'has-text-color has-my-little-pony-color',
+                               ),
+                       ),
+
+                       'elements_with_invalid_preset_style_property'  => array(
+                               'block_styles'    => array(
+                                       'color' => array(
+                                               'text' => 'var:preset|invalid_property|my-little-pony',
+                                       ),
+                               ),
+                               'options'         => array( 'selector' => '.wp-selector' ),
+                               'expected_output' => array(
+                                       'classnames' => 'has-text-color',
+                               ),
+                       ),
+
+                       'valid_classnames_deduped'                     => array(
+                               'block_styles'    => array(
+                                       'color'      => array(
+                                               'text'       => 'var:preset|color|copper-socks',
+                                               'background' => 'var:preset|color|splendid-carrot',
+                                               'gradient'   => 'var:preset|gradient|like-wow-dude',
+                                       ),
+                                       'typography' => array(
+                                               'fontSize'   => 'var:preset|font-size|fantastic',
+                                               'fontFamily' => 'var:preset|font-family|totally-awesome',
+                                       ),
+                               ),
+                               'options'         => array( 'convert_vars_to_classnames' => true ),
+                               'expected_output' => array(
+                                       'classnames' => 'has-text-color has-copper-socks-color has-background has-splendid-carrot-background-color has-like-wow-dude-gradient-background has-fantastic-font-size has-totally-awesome-font-family',
+                               ),
+                       ),
+
+                       'valid_classnames_and_css_vars'                => array(
+                               'block_styles'    => array(
+                                       'color' => array(
+                                               'text' => 'var:preset|color|teal-independents',
+                                       ),
+                               ),
+                               'options'         => array(),
+                               'expected_output' => array(
+                                       'css'          => 'color:var(--wp--preset--color--teal-independents);',
+                                       'declarations' => array(
+                                               'color' => 'var(--wp--preset--color--teal-independents)',
+                                       ),
+                                       'classnames'   => 'has-text-color has-teal-independents-color',
+                               ),
+                       ),
+
+                       'valid_classnames_with_null_style_values'      => array(
+                               'block_styles'    => array(
+                                       'color' => array(
+                                               'text'       => '#fff',
+                                               'background' => null,
+                                       ),
+                               ),
+                               'options'         => array(),
+                               'expected_output' => array(
+                                       'css'          => 'color:#fff;',
+                                       'declarations' => array(
+                                               'color' => '#fff',
+                                       ),
+                                       'classnames'   => 'has-text-color',
+                               ),
+                       ),
+
+                       'invalid_classnames_preset_value'              => array(
+                               'block_styles'    => array(
+                                       'color'   => array(
+                                               'text'       => 'var:cheese|color|fantastic',
+                                               'background' => 'var:preset|fromage|fantastic',
+                                       ),
+                                       'spacing' => array(
+                                               'margin'  => 'var:cheese|spacing|margin',
+                                               'padding' => 'var:preset|spacing|padding',
+                                       ),
+                               ),
+                               'options'         => array( 'convert_vars_to_classnames' => true ),
+                               'expected_output' => array(
+                                       'classnames' => 'has-text-color has-background',
+                               ),
+                       ),
+
+                       'valid_spacing_single_preset_values'           => array(
+                               'block_styles'    => array(
+                                       'spacing' => array(
+                                               'margin'  => 'var:preset|spacing|10',
+                                               'padding' => 'var:preset|spacing|20',
+                                       ),
+                               ),
+                               'options'         => array(),
+                               'expected_output' => array(
+                                       'css'          => 'padding:var(--wp--preset--spacing--20);margin:var(--wp--preset--spacing--10);',
+                                       'declarations' => array(
+                                               'padding' => 'var(--wp--preset--spacing--20)',
+                                               'margin'  => 'var(--wp--preset--spacing--10)',
+                                       ),
+                               ),
+                       ),
+
+                       'valid_spacing_multi_preset_values'            => array(
+                               'block_styles'    => array(
+                                       'spacing' => array(
+                                               'margin'  => array(
+                                                       'left'   => 'var:preset|spacing|10',
+                                                       'right'  => 'var:preset|spacing|20',
+                                                       'top'    => '1rem',
+                                                       'bottom' => '1rem',
+                                               ),
+                                               'padding' => array(
+                                                       'left'   => 'var:preset|spacing|30',
+                                                       'right'  => 'var:preset|spacing|40',
+                                                       'top'    => '14px',
+                                                       'bottom' => '14px',
+                                               ),
+                                       ),
+                               ),
+                               'options'         => array(),
+                               'expected_output' => array(
+                                       'css'          => 'padding-left:var(--wp--preset--spacing--30);padding-right:var(--wp--preset--spacing--40);padding-top:14px;padding-bottom:14px;margin-left:var(--wp--preset--spacing--10);margin-right:var(--wp--preset--spacing--20);margin-top:1rem;margin-bottom:1rem;',
+                                       'declarations' => array(
+                                               'padding-left'   => 'var(--wp--preset--spacing--30)',
+                                               'padding-right'  => 'var(--wp--preset--spacing--40)',
+                                               'padding-top'    => '14px',
+                                               'padding-bottom' => '14px',
+                                               'margin-left'    => 'var(--wp--preset--spacing--10)',
+                                               'margin-right'   => 'var(--wp--preset--spacing--20)',
+                                               'margin-top'     => '1rem',
+                                               'margin-bottom'  => '1rem',
+                                       ),
+                               ),
+                       ),
+
+                       'invalid_spacing_multi_preset_values'          => array(
+                               'block_styles'    => array(
+                                       'spacing' => array(
+                                               'margin' => array(
+                                                       'left'   => 'var:preset|spaceman|10',
+                                                       'right'  => 'var:preset|spaceman|20',
+                                                       'top'    => '1rem',
+                                                       'bottom' => '0',
+                                               ),
+                                       ),
+                               ),
+                               'options'         => array(),
+                               'expected_output' => array(
+                                       'css'          => 'margin-top:1rem;margin-bottom:0;',
+                                       'declarations' => array(
+                                               'margin-top'    => '1rem',
+                                               'margin-bottom' => '0',
+                                       ),
+                               ),
+                       ),
+
+                       'invalid_classnames_options'                   => array(
+                               'block_styles'    => array(
+                                       'typography' => array(
+                                               'fontSize'   => array(
+                                                       'tomodachi' => 'friends',
+                                               ),
+                                               'fontFamily' => array(
+                                                       'oishii' => 'tasty',
+                                               ),
+                                       ),
+                               ),
+                               'options'         => array(),
+                               'expected_output' => array(),
+                       ),
+
+                       'inline_valid_box_model_style_with_sides'      => array(
+                               'block_styles'    => array(
+                                       'border' => array(
+                                               'top'    => array(
+                                                       'color' => '#fe1',
+                                                       'width' => '1.5rem',
+                                                       'style' => 'dashed',
+                                               ),
+                                               'right'  => array(
+                                                       'color' => '#fe2',
+                                                       'width' => '1.4rem',
+                                                       'style' => 'solid',
+                                               ),
+                                               'bottom' => array(
+                                                       'color' => '#fe3',
+                                                       'width' => '1.3rem',
+                                               ),
+                                               'left'   => array(
+                                                       'color' => 'var:preset|color|swampy-yellow',
+                                                       'width' => '0.5rem',
+                                                       'style' => 'dotted',
+                                               ),
+                                       ),
+                               ),
+                               'options'         => array(),
+                               'expected_output' => array(
+                                       'css'          => 'border-top-color:#fe1;border-top-width:1.5rem;border-top-style:dashed;border-right-color:#fe2;border-right-width:1.4rem;border-right-style:solid;border-bottom-color:#fe3;border-bottom-width:1.3rem;border-left-color:var(--wp--preset--color--swampy-yellow);border-left-width:0.5rem;border-left-style:dotted;',
+                                       'declarations' => array(
+                                               'border-top-color'    => '#fe1',
+                                               'border-top-width'    => '1.5rem',
+                                               'border-top-style'    => 'dashed',
+                                               'border-right-color'  => '#fe2',
+                                               'border-right-width'  => '1.4rem',
+                                               'border-right-style'  => 'solid',
+                                               'border-bottom-color' => '#fe3',
+                                               'border-bottom-width' => '1.3rem',
+                                               'border-left-color'   => 'var(--wp--preset--color--swampy-yellow)',
+                                               'border-left-width'   => '0.5rem',
+                                               'border-left-style'   => 'dotted',
+                                       ),
+                               ),
+                       ),
+
+                       'inline_invalid_box_model_style_with_sides'    => array(
+                               'block_styles'    => array(
+                                       'border' => array(
+                                               'top'    => array(
+                                                       'top'    => '#fe1',
+                                                       'right'  => '1.5rem',
+                                                       'cheese' => 'dashed',
+                                               ),
+                                               'right'  => array(
+                                                       'right' => '#fe2',
+                                                       'top'   => '1.4rem',
+                                                       'bacon' => 'solid',
+                                               ),
+                                               'bottom' => array(
+                                                       'color'  => 'var:preset|color|terrible-lizard',
+                                                       'bottom' => '1.3rem',
+                                               ),
+                                               'left'   => array(
+                                                       'left'  => null,
+                                                       'width' => null,
+                                                       'top'   => 'dotted',
+                                               ),
+                                       ),
+                               ),
+                               'options'         => array(),
+                               'expected_output' => array(
+                                       'css'          => 'border-bottom-color:var(--wp--preset--color--terrible-lizard);',
+                                       'declarations' => array(
+                                               'border-bottom-color' => 'var(--wp--preset--color--terrible-lizard)',
+                                       ),
+                               ),
+                       ),
+               );
+       }
+
+       /**
+        * Tests adding rules to a store and retrieving a generated stylesheet.
+        *
+        * @ticket 56467
+        *
+        * @covers ::wp_style_engine_get_styles
+        */
+       public function test_should_store_block_styles_using_context() {
+               $block_styles = array(
+                       'spacing' => array(
+                               'padding' => array(
+                                       'top'    => '42px',
+                                       'left'   => '2%',
+                                       'bottom' => '44px',
+                                       'right'  => '5rem',
+                               ),
+                       ),
+               );
+
+               $generated_styles = wp_style_engine_get_styles(
+                       $block_styles,
+                       array(
+                               'context'  => 'block-supports',
+                               'selector' => 'article',
+                       )
+               );
+               $store            = WP_Style_Engine::get_store( 'block-supports' );
+               $rule             = $store->get_all_rules()['article'];
+
+               $this->assertSame( $generated_styles['css'], $rule->get_css() );
+       }
+
+       /**
+        * Tests that passing no context does not store styles.
+        *
+        * @ticket 56467
+        *
+        * @covers ::wp_style_engine_get_styles
+        */
+       public function test_should_not_store_block_styles_without_context() {
+               $block_styles = array(
+                       'typography' => array(
+                               'fontSize' => '999px',
+                       ),
+               );
+
+               wp_style_engine_get_styles(
+                       $block_styles,
+                       array(
+                               'selector' => '#font-size-rulez',
+                       )
+               );
+
+               $all_stores = WP_Style_Engine_CSS_Rules_Store::get_stores();
+
+               $this->assertEmpty( $all_stores );
+       }
+
+       /**
+        * Tests adding rules to a store and retrieving a generated stylesheet.
+        *
+        * @ticket 56467
+        *
+        * @covers ::wp_style_engine_get_stylesheet_from_context
+        */
+       public function test_should_get_stored_stylesheet_from_context() {
+               $css_rules           = array(
+                       array(
+                               'selector'     => '.frodo',
+                               'declarations' => array(
+                                       'color'        => 'brown',
+                                       'height'       => '10px',
+                                       'width'        => '30px',
+                                       'border-style' => 'dotted',
+                               ),
+                       ),
+                       array(
+                               'selector'     => '.samwise',
+                               'declarations' => array(
+                                       'color'        => 'brown',
+                                       'height'       => '20px',
+                                       'width'        => '50px',
+                                       'border-style' => 'solid',
+                               ),
+                       ),
+               );
+               $compiled_stylesheet = wp_style_engine_get_stylesheet_from_css_rules(
+                       $css_rules,
+                       array(
+                               'context' => 'test-store',
+                       )
+               );
+
+               $this->assertSame( $compiled_stylesheet, wp_style_engine_get_stylesheet_from_context( 'test-store' ) );
+       }
+
+       /**
+        * Tests returning a generated stylesheet from a set of rules.
+        *
+        * @ticket 56467
+        *
+        * @covers ::wp_style_engine_get_stylesheet_from_css_rules
+        */
+       public function test_should_return_stylesheet_from_css_rules() {
+               $css_rules = array(
+                       array(
+                               'selector'     => '.saruman',
+                               'declarations' => array(
+                                       'color'        => 'white',
+                                       'height'       => '100px',
+                                       'border-style' => 'solid',
+                                       'align-self'   => 'unset',
+                               ),
+                       ),
+                       array(
+                               'selector'     => '.gandalf',
+                               'declarations' => array(
+                                       'color'        => 'grey',
+                                       'height'       => '90px',
+                                       'border-style' => 'dotted',
+                                       'align-self'   => 'safe center',
+                               ),
+                       ),
+                       array(
+                               'selector'     => '.radagast',
+                               'declarations' => array(
+                                       'color'        => 'brown',
+                                       'height'       => '60px',
+                                       'border-style' => 'dashed',
+                                       'align-self'   => 'stretch',
+                               ),
+                       ),
+               );
+
+               $compiled_stylesheet = wp_style_engine_get_stylesheet_from_css_rules( $css_rules, array( 'prettify' => false ) );
+
+               $this->assertSame( '.saruman{color:white;height:100px;border-style:solid;align-self:unset;}.gandalf{color:grey;height:90px;border-style:dotted;align-self:safe center;}.radagast{color:brown;height:60px;border-style:dashed;align-self:stretch;}', $compiled_stylesheet );
+       }
+
+       /**
+        * Tests that incoming styles are deduped and merged.
+        *
+        * @ticket 56467
+        *
+        * @covers ::wp_style_engine_get_stylesheet_from_css_rules
+        */
+       public function test_should_dedupe_and_merge_css_rules() {
+               $css_rules = array(
+                       array(
+                               'selector'     => '.gandalf',
+                               'declarations' => array(
+                                       'color'        => 'grey',
+                                       'height'       => '90px',
+                                       'border-style' => 'dotted',
+                               ),
+                       ),
+                       array(
+                               'selector'     => '.gandalf',
+                               'declarations' => array(
+                                       'color'         => 'white',
+                                       'height'        => '190px',
+                                       'padding'       => '10px',
+                                       'margin-bottom' => '100px',
+                               ),
+                       ),
+                       array(
+                               'selector'     => '.dumbledore',
+                               'declarations' => array(
+                                       'color'        => 'grey',
+                                       'height'       => '90px',
+                                       'border-style' => 'dotted',
+                               ),
+                       ),
+                       array(
+                               'selector'     => '.rincewind',
+                               'declarations' => array(
+                                       'color'        => 'grey',
+                                       'height'       => '90px',
+                                       'border-style' => 'dotted',
+                               ),
+                       ),
+               );
+
+               $compiled_stylesheet = wp_style_engine_get_stylesheet_from_css_rules( $css_rules, array( 'prettify' => false ) );
+
+               $this->assertSame( '.gandalf{color:white;height:190px;border-style:dotted;padding:10px;margin-bottom:100px;}.dumbledore,.rincewind{color:grey;height:90px;border-style:dotted;}', $compiled_stylesheet );
+       }
+}
</ins><span class="cx" style="display: block; padding: 0 10px">Property changes on: trunk/tests/phpunit/tests/style-engine/styleEngine.php
</span><span class="cx" style="display: block; padding: 0 10px">___________________________________________________________________
</span></span></pre></div>
<a id="svneolstyle"></a>
<div class="addfile"><h4 style="background-color: #eee; color: inherit; margin: 1em 0; padding: 1.3em; font-size: 115%">Added: svn:eol-style</h4></div>
<ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+native
</ins><span class="cx" style="display: block; padding: 0 10px">\ No newline at end of property
</span><a id="trunktestsphpunittestsstyleenginewpStyleEngineCssDeclarationsphp"></a>
<div class="addfile"><h4 style="background-color: #eee; color: inherit; margin: 1em 0; padding: 1.3em; font-size: 115%">Added: trunk/tests/phpunit/tests/style-engine/wpStyleEngineCssDeclarations.php</h4>
<pre class="diff"><span>
<span class="info" style="display: block; padding: 0 10px; color: #888">--- trunk/tests/phpunit/tests/style-engine/wpStyleEngineCssDeclarations.php                           (rev 0)
+++ trunk/tests/phpunit/tests/style-engine/wpStyleEngineCssDeclarations.php     2022-09-14 12:46:33 UTC (rev 54156)
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -0,0 +1,293 @@
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+<?php
+/**
+ * Tests the Style Engine CSS declarations class.
+ *
+ * @package WordPress
+ * @subpackage StyleEngine
+ * @since 6.1.0
+ *
+ * @group style-engine
+ */
+
+/**
+ * Tests registering, storing and generating CSS declarations.
+ *
+ * @coversDefaultClass WP_Style_Engine_CSS_Declarations
+ */
+class Tests_Style_Engine_wpStyleEngineCSSDeclarations extends WP_UnitTestCase {
+       /**
+        * Tests setting declarations on instantiation.
+        *
+        * @ticket 56467
+        *
+        * @covers ::__construct
+        */
+       public function test_should_set_declarations_on_instantiation() {
+               $input_declarations = array(
+                       'margin-top' => '10px',
+                       'font-size'  => '2rem',
+               );
+               $css_declarations   = new WP_Style_Engine_CSS_Declarations( $input_declarations );
+
+               $this->assertSame( $input_declarations, $css_declarations->get_declarations() );
+       }
+
+       /**
+        * Tests that declarations are added.
+        *
+        * @ticket 56467
+        *
+        * @covers ::add_declarations
+        * @covers ::add_declaration
+        */
+       public function test_should_add_declarations() {
+               $input_declarations = array(
+                       'padding' => '20px',
+                       'color'   => 'var(--wp--preset--elbow-patches)',
+               );
+               $css_declarations   = new WP_Style_Engine_CSS_Declarations();
+               $css_declarations->add_declarations( $input_declarations );
+
+               $this->assertSame( $input_declarations, $css_declarations->get_declarations() );
+       }
+
+       /**
+        * Tests that new declarations are added to existing declarations.
+        *
+        * @ticket 56467
+        *
+        * @covers ::add_declarations
+        * @covers ::add_declaration
+        */
+       public function test_should_add_new_declarations_to_existing() {
+               $input_declarations = array(
+                       'border-width'     => '1%',
+                       'background-color' => 'var(--wp--preset--english-mustard)',
+               );
+               $css_declarations   = new WP_Style_Engine_CSS_Declarations( $input_declarations );
+               $extra_declaration  = array(
+                       'letter-spacing' => '1.5px',
+               );
+               $css_declarations->add_declarations( $extra_declaration );
+
+               $this->assertSame( array_merge( $input_declarations, $extra_declaration ), $css_declarations->get_declarations() );
+       }
+
+       /**
+        * Tests that properties are sanitized before storing.
+        *
+        * @ticket 56467
+        *
+        * @covers ::sanitize_property
+        */
+       public function test_should_sanitize_properties() {
+               $input_declarations = array(
+                       '^--wp--style--sleepy-potato$' => '40px',
+                       '<background-//color>'         => 'var(--wp--preset--english-mustard)',
+               );
+               $css_declarations   = new WP_Style_Engine_CSS_Declarations( $input_declarations );
+
+               $this->assertSame(
+                       array(
+                               '--wp--style--sleepy-potato' => '40px',
+                               'background-color'           => 'var(--wp--preset--english-mustard)',
+                       ),
+                       $css_declarations->get_declarations()
+               );
+       }
+
+       /**
+        * Test that values with HTML tags are escaped, and CSS properties are run through safecss_filter_attr().
+        *
+        * @ticket 56467
+        *
+        * @covers ::get_declarations_string
+        * @covers ::filter_declaration
+        */
+       public function test_should_strip_html_tags_and_remove_unsafe_css_properties() {
+               $input_declarations         = array(
+                       'font-size'    => '<red/>',
+                       'padding'      => '</style>',
+                       'potato'       => 'uppercase',
+                       'cheese'       => '10px',
+                       'margin-right' => '10em',
+               );
+               $css_declarations           = new WP_Style_Engine_CSS_Declarations( $input_declarations );
+               $safe_style_css_mock_action = new MockAction();
+
+               // filter_declaration() is called in get_declarations_string().
+               add_filter( 'safe_style_css', array( $safe_style_css_mock_action, 'filter' ) );
+               $css_declarations_string = $css_declarations->get_declarations_string();
+
+               $this->assertSame(
+                       3, // Values with HTML tags are removed first by wp_strip_all_tags().
+                       $safe_style_css_mock_action->get_call_count(),
+                       '"safe_style_css" filters were not applied to CSS declaration properties.'
+               );
+
+               $this->assertSame(
+                       'margin-right:10em;',
+                       $css_declarations_string,
+                       'Unallowed CSS properties or values with HTML tags were not removed.'
+               );
+       }
+
+       /**
+        * Tests that calc, clamp, min, max, and minmax CSS functions are allowed.
+        *
+        * @ticket 56467
+        *
+        * @covers ::get_declarations_string
+        * @covers ::filter_declaration
+        */
+       public function test_should_allow_css_functions_and_strip_unsafe_css_values() {
+               $input_declarations                        = array(
+                       'background'       => 'var(--wp--preset--color--primary, 10px)', // Simple var().
+                       'font-size'        => 'clamp(36.00rem, calc(32.00rem + 10.00vw), 40.00rem)', // Nested clamp().
+                       'width'            => 'min(150vw, 100px)',
+                       'min-width'        => 'max(150vw, 100px)',
+                       'max-width'        => 'minmax(400px, 50%)',
+                       'padding'          => 'calc(80px * -1)',
+                       'background-image' => 'url("https://wordpress.org")',
+                       'line-height'      => 'url("https://wordpress.org")',
+                       'margin'           => 'illegalfunction(30px)',
+               );
+               $css_declarations                          = new WP_Style_Engine_CSS_Declarations( $input_declarations );
+               $safecss_filter_attr_allow_css_mock_action = new MockAction();
+
+               // filter_declaration() is called in get_declarations_string().
+               add_filter( 'safecss_filter_attr_allow_css', array( $safecss_filter_attr_allow_css_mock_action, 'filter' ) );
+               $css_declarations_string = $css_declarations->get_declarations_string();
+
+               $this->assertSame(
+                       9,
+                       $safecss_filter_attr_allow_css_mock_action->get_call_count(),
+                       '"safecss_filter_attr_allow_css" filters were not applied to CSS declaration values.'
+               );
+
+               $this->assertSame(
+                       'background:var(--wp--preset--color--primary, 10px);font-size:clamp(36.00rem, calc(32.00rem + 10.00vw), 40.00rem);width:min(150vw, 100px);min-width:max(150vw, 100px);max-width:minmax(400px, 50%);padding:calc(80px * -1);background-image:url("https://wordpress.org");',
+                       $css_declarations_string,
+                       'Unsafe values were not removed'
+               );
+       }
+
+       /**
+        * Tests that CSS declarations are compiled into a CSS declarations block string.
+        *
+        * @ticket 56467
+        *
+        * @covers ::get_declarations_string
+        *
+        * @dataProvider data_should_compile_css_declarations_to_css_declarations_string
+        *
+        * @param string $expected        The expected declarations block string.
+        * @param bool   $should_prettify Optional. Whether to pretty the string. Default false.
+        * @param int    $indent_count    Optional. The number of tab indents. Default false.
+        */
+       public function test_should_compile_css_declarations_to_css_declarations_string( $expected, $should_prettify = false, $indent_count = 0 ) {
+               $input_declarations = array(
+                       'color'                  => 'red',
+                       'border-top-left-radius' => '99px',
+                       'text-decoration'        => 'underline',
+               );
+               $css_declarations   = new WP_Style_Engine_CSS_Declarations( $input_declarations );
+
+               $this->assertSame(
+                       $expected,
+                       $css_declarations->get_declarations_string( $should_prettify, $indent_count )
+               );
+       }
+
+       /**
+        * Data provider for test_should_compile_css_declarations_to_css_declarations_string().
+        *
+        * @return array
+        */
+       public function data_should_compile_css_declarations_to_css_declarations_string() {
+               return array(
+                       'unprettified, no indent'  => array(
+                               'expected' => 'color:red;border-top-left-radius:99px;text-decoration:underline;',
+                       ),
+                       'unprettified, one indent' => array(
+                               'expected'        => 'color:red;border-top-left-radius:99px;text-decoration:underline;',
+                               'should_prettify' => false,
+                               'indent_count'    => 1,
+                       ),
+                       'prettified, no indent'    => array(
+                               'expected'        => 'color: red; border-top-left-radius: 99px; text-decoration: underline;',
+                               'should_prettify' => true,
+                       ),
+                       'prettified, one indent'   => array(
+                               'expected'        => "\tcolor: red;\n\tborder-top-left-radius: 99px;\n\ttext-decoration: underline;",
+                               'should_prettify' => true,
+                               'indent_count'    => 1,
+                       ),
+                       'prettified, two indents'  => array(
+                               'expected'        => "\t\tcolor: red;\n\t\tborder-top-left-radius: 99px;\n\t\ttext-decoration: underline;",
+                               'should_prettify' => true,
+                               'indent_count'    => 2,
+                       ),
+               );
+       }
+
+       /**
+        * Tests removing a single declaration.
+        *
+        * @ticket 56467
+        *
+        * @covers ::remove_declaration
+        */
+       public function test_should_remove_single_declaration() {
+               $input_declarations = array(
+                       'color'       => 'tomato',
+                       'margin'      => '10em 10em 20em 1px',
+                       'font-family' => 'Happy Font serif',
+               );
+               $css_declarations   = new WP_Style_Engine_CSS_Declarations( $input_declarations );
+
+               $this->assertSame(
+                       'color:tomato;margin:10em 10em 20em 1px;font-family:Happy Font serif;',
+                       $css_declarations->get_declarations_string(),
+                       'CSS declarations string does not match the values of `$declarations` passed to the constructor.'
+               );
+
+               $css_declarations->remove_declaration( 'color' );
+
+               $this->assertSame(
+                       'margin:10em 10em 20em 1px;font-family:Happy Font serif;',
+                       $css_declarations->get_declarations_string(),
+                       'Output after removing "color" declaration via `remove_declaration()` does not match expectations'
+               );
+       }
+
+       /**
+        * Tests that multiple declarations are removed.
+        *
+        * @ticket 56467
+        *
+        * @covers ::remove_declarations
+        */
+       public function test_should_remove_multiple_declarations() {
+               $input_declarations = array(
+                       'color'       => 'cucumber',
+                       'margin'      => '10em 10em 20em 1px',
+                       'font-family' => 'Happy Font serif',
+               );
+               $css_declarations   = new WP_Style_Engine_CSS_Declarations( $input_declarations );
+
+               $this->assertSame(
+                       'color:cucumber;margin:10em 10em 20em 1px;font-family:Happy Font serif;',
+                       $css_declarations->get_declarations_string(),
+                       'CSS declarations string does not match the values of `$declarations` passed to the constructor.'
+               );
+
+               $css_declarations->remove_declarations( array( 'color', 'margin' ) );
+
+               $this->assertSame(
+                       'font-family:Happy Font serif;',
+                       $css_declarations->get_declarations_string(),
+                       'Output after removing "color" and "margin" declarations via `remove_declarations()` does not match expectations'
+               );
+       }
+}
</ins><span class="cx" style="display: block; padding: 0 10px">Property changes on: trunk/tests/phpunit/tests/style-engine/wpStyleEngineCssDeclarations.php
</span><span class="cx" style="display: block; padding: 0 10px">___________________________________________________________________
</span></span></pre></div>
<a id="svneolstyle"></a>
<div class="addfile"><h4 style="background-color: #eee; color: inherit; margin: 1em 0; padding: 1.3em; font-size: 115%">Added: svn:eol-style</h4></div>
<ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+native
</ins><span class="cx" style="display: block; padding: 0 10px">\ No newline at end of property
</span><a id="trunktestsphpunittestsstyleenginewpStyleEngineCssRulephp"></a>
<div class="addfile"><h4 style="background-color: #eee; color: inherit; margin: 1em 0; padding: 1.3em; font-size: 115%">Added: trunk/tests/phpunit/tests/style-engine/wpStyleEngineCssRule.php</h4>
<pre class="diff"><span>
<span class="info" style="display: block; padding: 0 10px; color: #888">--- trunk/tests/phpunit/tests/style-engine/wpStyleEngineCssRule.php                           (rev 0)
+++ trunk/tests/phpunit/tests/style-engine/wpStyleEngineCssRule.php     2022-09-14 12:46:33 UTC (rev 54156)
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -0,0 +1,161 @@
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+<?php
+/**
+ * Tests the Style Engine CSS Rule class.
+ *
+ * @package WordPress
+ * @subpackage StyleEngine
+ * @since 6.1.0
+ *
+ * @group style-engine
+ */
+
+/**
+ * Tests for registering, storing and generating CSS rules.
+ *
+ * @coversDefaultClass WP_Style_Engine_CSS_Rule
+ */
+class Tests_Style_Engine_wpStyleEngineCSSRule extends WP_UnitTestCase {
+       /**
+        * Tests that declarations are set on instantiation.
+        *
+        * @ticket 56467
+        * @covers ::__construct
+        */
+       public function test_should_instantiate_with_selector_and_rules() {
+               $selector           = '.law-and-order';
+               $input_declarations = array(
+                       'margin-top' => '10px',
+                       'font-size'  => '2rem',
+               );
+               $css_declarations   = new WP_Style_Engine_CSS_Declarations( $input_declarations );
+               $css_rule           = new WP_Style_Engine_CSS_Rule( $selector, $css_declarations );
+
+               $this->assertSame( $selector, $css_rule->get_selector(), 'Return value of get_selector() does not match value passed to constructor.' );
+
+               $expected = "$selector{{$css_declarations->get_declarations_string()}}";
+
+               $this->assertSame( $expected, $css_rule->get_css(), 'Value returned by get_css() does not match expected declarations string.' );
+       }
+
+       /**
+        * Tests that declaration properties are deduplicated.
+        *
+        * @ticket 56467
+        *
+        * @covers ::add_declarations
+        * @covers ::get_css
+        */
+       public function test_should_dedupe_properties_in_rules() {
+               $selector                    = '.taggart';
+               $first_declaration           = array(
+                       'font-size' => '2rem',
+               );
+               $overwrite_first_declaration = array(
+                       'font-size' => '4px',
+               );
+               $css_rule                    = new WP_Style_Engine_CSS_Rule( $selector, $first_declaration );
+               $css_rule->add_declarations( new WP_Style_Engine_CSS_Declarations( $overwrite_first_declaration ) );
+
+               $expected = '.taggart{font-size:4px;}';
+
+               $this->assertSame( $expected, $css_rule->get_css() );
+       }
+
+       /**
+        * Tests that declarations can be added to existing rules.
+        *
+        * @ticket 56467
+        *
+        * @covers ::add_declarations
+        * @covers ::get_css
+        */
+       public function test_should_add_declarations_to_existing_rules() {
+               // Declarations using a WP_Style_Engine_CSS_Declarations object.
+               $some_css_declarations = new WP_Style_Engine_CSS_Declarations( array( 'margin-top' => '10px' ) );
+               // Declarations using a property => value array.
+               $some_more_css_declarations = array( 'font-size' => '1rem' );
+               $css_rule                   = new WP_Style_Engine_CSS_Rule( '.hill-street-blues', $some_css_declarations );
+               $css_rule->add_declarations( $some_more_css_declarations );
+
+               $expected = '.hill-street-blues{margin-top:10px;font-size:1rem;}';
+
+               $this->assertSame( $expected, $css_rule->get_css() );
+       }
+
+       /**
+        * Tests setting a selector to a rule.
+        *
+        * @ticket 56467
+        *
+        * @covers ::set_selector
+        */
+       public function test_should_set_selector() {
+               $selector = '.taggart';
+               $css_rule = new WP_Style_Engine_CSS_Rule( $selector );
+
+               $this->assertSame( $selector, $css_rule->get_selector(), 'Return value of get_selector() does not match value passed to constructor.' );
+
+               $css_rule->set_selector( '.law-and-order' );
+
+               $this->assertSame( '.law-and-order', $css_rule->get_selector(), 'Return value of get_selector() does not match value passed to set_selector().' );
+       }
+
+       /**
+        * Tests generating a CSS rule string.
+        *
+        * @ticket 56467
+        *
+        * @covers ::get_css
+        */
+       public function test_should_generate_css_rule_string() {
+               $selector           = '.chips';
+               $input_declarations = array(
+                       'margin-top' => '10px',
+                       'font-size'  => '2rem',
+               );
+               $css_declarations   = new WP_Style_Engine_CSS_Declarations( $input_declarations );
+               $css_rule           = new WP_Style_Engine_CSS_Rule( $selector, $css_declarations );
+               $expected           = "$selector{{$css_declarations->get_declarations_string()}}";
+
+               $this->assertSame( $expected, $css_rule->get_css() );
+       }
+
+       /**
+        * Tests that an empty string will be returned where there are no declarations in a CSS rule.
+        *
+        * @ticket 56467
+        *
+        * @covers ::get_css
+        */
+       public function test_should_return_empty_string_with_no_declarations() {
+               $selector           = '.holmes';
+               $input_declarations = array();
+               $css_declarations   = new WP_Style_Engine_CSS_Declarations( $input_declarations );
+               $css_rule           = new WP_Style_Engine_CSS_Rule( $selector, $css_declarations );
+
+               $this->assertSame( '', $css_rule->get_css() );
+       }
+
+       /**
+        * Tests that CSS rules are prettified.
+        *
+        * @ticket 56467
+        *
+        * @covers ::get_css
+        */
+       public function test_should_prettify_css_rule_output() {
+               $selector           = '.baptiste';
+               $input_declarations = array(
+                       'margin-left' => '0',
+                       'font-family' => 'Detective Sans',
+               );
+               $css_declarations   = new WP_Style_Engine_CSS_Declarations( $input_declarations );
+               $css_rule           = new WP_Style_Engine_CSS_Rule( $selector, $css_declarations );
+               $expected           = '.baptiste {
+       margin-left: 0;
+       font-family: Detective Sans;
+}';
+
+               $this->assertSame( $expected, $css_rule->get_css( true ) );
+       }
+}
</ins><span class="cx" style="display: block; padding: 0 10px">Property changes on: trunk/tests/phpunit/tests/style-engine/wpStyleEngineCssRule.php
</span><span class="cx" style="display: block; padding: 0 10px">___________________________________________________________________
</span></span></pre></div>
<a id="svneolstyle"></a>
<div class="addfile"><h4 style="background-color: #eee; color: inherit; margin: 1em 0; padding: 1.3em; font-size: 115%">Added: svn:eol-style</h4></div>
<ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+native
</ins><span class="cx" style="display: block; padding: 0 10px">\ No newline at end of property
</span><a id="trunktestsphpunittestsstyleenginewpStyleEngineCssRulesStorephp"></a>
<div class="addfile"><h4 style="background-color: #eee; color: inherit; margin: 1em 0; padding: 1.3em; font-size: 115%">Added: trunk/tests/phpunit/tests/style-engine/wpStyleEngineCssRulesStore.php</h4>
<pre class="diff"><span>
<span class="info" style="display: block; padding: 0 10px; color: #888">--- trunk/tests/phpunit/tests/style-engine/wpStyleEngineCssRulesStore.php                             (rev 0)
+++ trunk/tests/phpunit/tests/style-engine/wpStyleEngineCssRulesStore.php       2022-09-14 12:46:33 UTC (rev 54156)
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -0,0 +1,190 @@
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+<?php
+/**
+ * Tests the Style Engine CSS Rules Store class.
+ *
+ * @package WordPress
+ * @subpackage StyleEngine
+ * @since 6.1.0
+ *
+ * @group style-engine
+ */
+
+/**
+ * Tests for registering, storing and retrieving a collection of CSS Rules (a store).
+ *
+ * @coversDefaultClass WP_Style_Engine_CSS_Rules_Store
+ */
+class Tests_Style_Engine_wpStyleEngineCSSRulesStore extends WP_UnitTestCase {
+       /**
+        * Cleans up stores after each test.
+        */
+       public function tear_down() {
+               WP_Style_Engine_CSS_Rules_Store::remove_all_stores();
+               parent::tear_down();
+       }
+
+       /**
+        * Tests creating a new store on instantiation.
+        *
+        * @ticket 56467
+        *
+        * @covers ::__construct
+        */
+       public function test_should_create_new_store_on_instantiation() {
+               $new_pancakes_store = WP_Style_Engine_CSS_Rules_Store::get_store( 'pancakes-with-strawberries' );
+
+               $this->assertInstanceOf( 'WP_Style_Engine_CSS_Rules_Store', $new_pancakes_store );
+       }
+
+       /**
+        * Tests that a `$store_name` argument is required and no store will be created without one.
+        *
+        * @ticket 56467
+        *
+        * @covers ::get_store
+        */
+       public function test_should_not_create_store_without_a_store_name() {
+               $not_a_store = WP_Style_Engine_CSS_Rules_Store::get_store( '' );
+
+               $this->assertEmpty( $not_a_store, 'get_store() did not return an empty value with empty string as argument.' );
+
+               $also_not_a_store = WP_Style_Engine_CSS_Rules_Store::get_store( 123 );
+
+               $this->assertEmpty( $also_not_a_store, 'get_store() did not return an empty value with number as argument.' );
+
+               $definitely_not_a_store = WP_Style_Engine_CSS_Rules_Store::get_store( null );
+
+               $this->assertEmpty( $definitely_not_a_store, 'get_store() did not return an empty value with `null` as argument.' );
+       }
+
+       /**
+        * Tests returning a previously created store when the same selector key is passed.
+        *
+        * @ticket 56467
+        *
+        * @covers ::get_store
+        */
+       public function test_should_return_existing_store() {
+               $new_fish_store = WP_Style_Engine_CSS_Rules_Store::get_store( 'fish-n-chips' );
+               $selector       = '.haddock';
+
+               $new_fish_store->add_rule( $selector );
+
+               $this->assertSame( $selector, $new_fish_store->add_rule( $selector )->get_selector(), 'Selector string of store rule does not match expected value' );
+
+               $the_same_fish_store = WP_Style_Engine_CSS_Rules_Store::get_store( 'fish-n-chips' );
+
+               $this->assertSame( $selector, $the_same_fish_store->add_rule( $selector )->get_selector(), 'Selector string of existing store rule does not match expected value' );
+       }
+
+       /**
+        * Tests returning all previously created stores.
+        *
+        * @ticket 56467
+        *
+        * @covers ::get_stores
+        */
+       public function test_should_get_all_existing_stores() {
+               $burrito_store    = WP_Style_Engine_CSS_Rules_Store::get_store( 'burrito' );
+               $quesadilla_store = WP_Style_Engine_CSS_Rules_Store::get_store( 'quesadilla' );
+
+               $this->assertEquals(
+                       array(
+                               'burrito'    => $burrito_store,
+                               'quesadilla' => $quesadilla_store,
+                       ),
+                       WP_Style_Engine_CSS_Rules_Store::get_stores()
+               );
+       }
+
+       /**
+        * Tests that all previously created stores are deleted.
+        *
+        * @ticket 56467
+        *
+        * @covers ::remove_all_stores
+        */
+       public function test_should_remove_all_stores() {
+               $dolmades_store = WP_Style_Engine_CSS_Rules_Store::get_store( 'dolmades' );
+               $tzatziki_store = WP_Style_Engine_CSS_Rules_Store::get_store( 'tzatziki' );
+
+               $this->assertEquals(
+                       array(
+                               'dolmades' => $dolmades_store,
+                               'tzatziki' => $tzatziki_store,
+                       ),
+                       WP_Style_Engine_CSS_Rules_Store::get_stores(),
+                       'Return value of get_stores() does not match expectation'
+               );
+
+               WP_Style_Engine_CSS_Rules_Store::remove_all_stores();
+
+               $this->assertEquals(
+                       array(),
+                       WP_Style_Engine_CSS_Rules_Store::get_stores(),
+                       'Return value of get_stores() is not an empty array after remove_all_stores() called.'
+               );
+       }
+
+       /**
+        * Tests adding rules to an existing store.
+        *
+        * @ticket 56467
+        *
+        * @covers ::add_rule
+        */
+       public function test_should_add_rule_to_existing_store() {
+               $new_pie_store = WP_Style_Engine_CSS_Rules_Store::get_store( 'meat-pie' );
+               $selector      = '.wp-block-sauce a:hover';
+               $store_rule    = $new_pie_store->add_rule( $selector );
+               $expected      = '';
+
+               $this->assertSame( $expected, $store_rule->get_css(), 'Return value of get_css() is not a empty string where a rule has no CSS declarations.' );
+
+               $pie_declarations = array(
+                       'color'         => 'brown',
+                       'border-color'  => 'yellow',
+                       'border-radius' => '10rem',
+               );
+               $css_declarations = new WP_Style_Engine_CSS_Declarations( $pie_declarations );
+               $store_rule->add_declarations( $css_declarations );
+               $store_rule = $new_pie_store->add_rule( $selector );
+
+               $expected = "$selector{{$css_declarations->get_declarations_string()}}";
+
+               $this->assertSame( $expected, $store_rule->get_css(), 'Return value of get_css() does not match expected CSS from existing store rules.' );
+       }
+
+       /**
+        * Tests that all stored rule objects are returned.
+        *
+        * @ticket 56467
+        *
+        * @covers ::get_all_rules
+        */
+       public function test_should_get_all_rule_objects_for_a_store() {
+               $new_pizza_store = WP_Style_Engine_CSS_Rules_Store::get_store( 'pizza-with-mozzarella' );
+               $selector        = '.wp-block-anchovies a:hover';
+               $store_rule      = $new_pizza_store->add_rule( $selector );
+               $expected        = array(
+                       $selector => $store_rule,
+               );
+
+               $this->assertSame( $expected, $new_pizza_store->get_all_rules(), 'Return value for get_all_rules() does not match expectations.' );
+
+               $new_selector             = '.wp-block-mushroom a:hover';
+               $newer_pizza_declarations = array(
+                       'padding' => '100px',
+               );
+               $new_store_rule           = $new_pizza_store->add_rule( $new_selector );
+               $css_declarations         = new WP_Style_Engine_CSS_Declarations( $newer_pizza_declarations );
+               $new_store_rule->add_declarations( array( $css_declarations ) );
+
+               $expected = array(
+                       $selector     => $store_rule,
+                       $new_selector => $new_store_rule,
+               );
+
+               $this->assertSame( $expected, $new_pizza_store->get_all_rules(), 'Return value for get_all_rules() does not match expectations after adding new rules to store.' );
+       }
+}
</ins><span class="cx" style="display: block; padding: 0 10px">Property changes on: trunk/tests/phpunit/tests/style-engine/wpStyleEngineCssRulesStore.php
</span><span class="cx" style="display: block; padding: 0 10px">___________________________________________________________________
</span></span></pre></div>
<a id="svneolstyle"></a>
<div class="addfile"><h4 style="background-color: #eee; color: inherit; margin: 1em 0; padding: 1.3em; font-size: 115%">Added: svn:eol-style</h4></div>
<ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+native
</ins><span class="cx" style="display: block; padding: 0 10px">\ No newline at end of property
</span><a id="trunktestsphpunittestsstyleenginewpStyleEngineProcessorphp"></a>
<div class="addfile"><h4 style="background-color: #eee; color: inherit; margin: 1em 0; padding: 1.3em; font-size: 115%">Added: trunk/tests/phpunit/tests/style-engine/wpStyleEngineProcessor.php</h4>
<pre class="diff"><span>
<span class="info" style="display: block; padding: 0 10px; color: #888">--- trunk/tests/phpunit/tests/style-engine/wpStyleEngineProcessor.php                         (rev 0)
+++ trunk/tests/phpunit/tests/style-engine/wpStyleEngineProcessor.php   2022-09-14 12:46:33 UTC (rev 54156)
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -0,0 +1,315 @@
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+<?php
+/**
+ * Tests the Style Engine Processor class.
+ *
+ * @package WordPress
+ * @subpackage StyleEngine
+ * @since 6.1.0
+ *
+ * @group style-engine
+ */
+
+/**
+ * Tests for compiling and rendering styles from a store of CSS rules.
+ *
+ * @coversDefaultClass WP_Style_Engine_Processor
+ */
+class Tests_Style_Engine_wpStyleEngineProcessor extends WP_UnitTestCase {
+       /**
+        * Tests adding rules and returning compiled CSS rules.
+        *
+        * @ticket 56467
+        *
+        * @covers ::add_rules
+        * @covers ::get_css
+        */
+       public function test_should_return_rules_as_compiled_css() {
+               $a_nice_css_rule = new WP_Style_Engine_CSS_Rule( '.a-nice-rule' );
+               $a_nice_css_rule->add_declarations(
+                       array(
+                               'color'            => 'var(--nice-color)',
+                               'background-color' => 'purple',
+                       )
+               );
+               $a_nicer_css_rule = new WP_Style_Engine_CSS_Rule( '.a-nicer-rule' );
+               $a_nicer_css_rule->add_declarations(
+                       array(
+                               'font-family'      => 'Nice sans',
+                               'font-size'        => '1em',
+                               'background-color' => 'purple',
+                       )
+               );
+               $a_nice_processor = new WP_Style_Engine_Processor();
+               $a_nice_processor->add_rules( array( $a_nice_css_rule, $a_nicer_css_rule ) );
+
+               $this->assertSame(
+                       '.a-nice-rule{color:var(--nice-color);background-color:purple;}.a-nicer-rule{font-family:Nice sans;font-size:1em;background-color:purple;}',
+                       $a_nice_processor->get_css( array( 'prettify' => false ) )
+               );
+       }
+
+       /**
+        * Tests compiling CSS rules and formatting them with new lines and indents.
+        *
+        * @ticket 56467
+        *
+        * @covers ::get_css
+        */
+       public function test_should_return_prettified_css_rules() {
+               $a_wonderful_css_rule = new WP_Style_Engine_CSS_Rule( '.a-wonderful-rule' );
+               $a_wonderful_css_rule->add_declarations(
+                       array(
+                               'color'            => 'var(--wonderful-color)',
+                               'background-color' => 'orange',
+                       )
+               );
+               $a_very_wonderful_css_rule = new WP_Style_Engine_CSS_Rule( '.a-very_wonderful-rule' );
+               $a_very_wonderful_css_rule->add_declarations(
+                       array(
+                               'color'            => 'var(--wonderful-color)',
+                               'background-color' => 'orange',
+                       )
+               );
+               $a_more_wonderful_css_rule = new WP_Style_Engine_CSS_Rule( '.a-more-wonderful-rule' );
+               $a_more_wonderful_css_rule->add_declarations(
+                       array(
+                               'font-family'      => 'Wonderful sans',
+                               'font-size'        => '1em',
+                               'background-color' => 'orange',
+                       )
+               );
+               $a_wonderful_processor = new WP_Style_Engine_Processor();
+               $a_wonderful_processor->add_rules( array( $a_wonderful_css_rule, $a_very_wonderful_css_rule, $a_more_wonderful_css_rule ) );
+
+               $expected = '.a-more-wonderful-rule {
+       font-family: Wonderful sans;
+       font-size: 1em;
+       background-color: orange;
+}
+.a-wonderful-rule,
+.a-very_wonderful-rule {
+       color: var(--wonderful-color);
+       background-color: orange;
+}
+';
+               $this->assertSame(
+                       $expected,
+                       $a_wonderful_processor->get_css( array( 'prettify' => true ) )
+               );
+       }
+
+       /**
+        * Tests adding a store and compiling CSS rules from that store.
+        *
+        * @ticket 56467
+        *
+        * @covers ::add_store
+        */
+       public function test_should_return_store_rules_as_css() {
+               $a_nice_store = WP_Style_Engine_CSS_Rules_Store::get_store( 'nice' );
+               $a_nice_store->add_rule( '.a-nice-rule' )->add_declarations(
+                       array(
+                               'color'            => 'var(--nice-color)',
+                               'background-color' => 'purple',
+                       )
+               );
+               $a_nice_store->add_rule( '.a-nicer-rule' )->add_declarations(
+                       array(
+                               'font-family'      => 'Nice sans',
+                               'font-size'        => '1em',
+                               'background-color' => 'purple',
+                       )
+               );
+               $a_nice_renderer = new WP_Style_Engine_Processor();
+               $a_nice_renderer->add_store( $a_nice_store );
+
+               $this->assertSame(
+                       '.a-nice-rule{color:var(--nice-color);background-color:purple;}.a-nicer-rule{font-family:Nice sans;font-size:1em;background-color:purple;}',
+                       $a_nice_renderer->get_css( array( 'prettify' => false ) )
+               );
+       }
+
+       /**
+        * Tests that CSS declarations are merged and deduped in the final CSS rules output.
+        *
+        * @ticket 56467
+        *
+        * @covers ::add_rules
+        * @covers ::get_css
+        */
+       public function test_should_dedupe_and_merge_css_declarations() {
+               $an_excellent_rule      = new WP_Style_Engine_CSS_Rule( '.an-excellent-rule' );
+               $an_excellent_processor = new WP_Style_Engine_Processor();
+               $an_excellent_rule->add_declarations(
+                       array(
+                               'color'        => 'var(--excellent-color)',
+                               'border-style' => 'dotted',
+                       )
+               );
+               $an_excellent_processor->add_rules( $an_excellent_rule );
+
+               $another_excellent_rule = new WP_Style_Engine_CSS_Rule( '.an-excellent-rule' );
+               $another_excellent_rule->add_declarations(
+                       array(
+                               'color'        => 'var(--excellent-color)',
+                               'border-style' => 'dotted',
+                               'border-color' => 'brown',
+                       )
+               );
+               $an_excellent_processor->add_rules( $another_excellent_rule );
+
+               $this->assertSame(
+                       '.an-excellent-rule{color:var(--excellent-color);border-style:dotted;border-color:brown;}',
+                       $an_excellent_processor->get_css( array( 'prettify' => false ) ),
+                       'Return value of get_css() does not match expectations with new, deduped and merged declarations.'
+               );
+
+               $yet_another_excellent_rule = new WP_Style_Engine_CSS_Rule( '.an-excellent-rule' );
+               $yet_another_excellent_rule->add_declarations(
+                       array(
+                               'color'        => 'var(--excellent-color)',
+                               'border-style' => 'dashed',
+                               'border-width' => '2px',
+                       )
+               );
+               $an_excellent_processor->add_rules( $yet_another_excellent_rule );
+
+               $this->assertSame(
+                       '.an-excellent-rule{color:var(--excellent-color);border-style:dashed;border-color:brown;border-width:2px;}',
+                       $an_excellent_processor->get_css( array( 'prettify' => false ) ),
+                       'Return value of get_css() does not match expectations with deduped and merged declarations.'
+               );
+       }
+
+       /**
+        * Tests printing out 'unoptimized' CSS, that is, uncombined selectors and duplicate CSS rules.
+        *
+        * @ticket 56467
+        *
+        * @covers ::get_css
+        */
+       public function test_should_not_optimize_css_output() {
+               $a_sweet_rule = new WP_Style_Engine_CSS_Rule(
+                       '.a-sweet-rule',
+                       array(
+                               'color'            => 'var(--sweet-color)',
+                               'background-color' => 'purple',
+                       )
+               );
+
+               $a_sweeter_rule = new WP_Style_Engine_CSS_Rule(
+                       '#an-even-sweeter-rule > marquee',
+                       array(
+                               'color'            => 'var(--sweet-color)',
+                               'background-color' => 'purple',
+                       )
+               );
+
+               $the_sweetest_rule = new WP_Style_Engine_CSS_Rule(
+                       '.the-sweetest-rule-of-all a',
+                       array(
+                               'color'            => 'var(--sweet-color)',
+                               'background-color' => 'purple',
+                       )
+               );
+
+               $a_sweet_processor = new WP_Style_Engine_Processor();
+               $a_sweet_processor->add_rules( array( $a_sweet_rule, $a_sweeter_rule, $the_sweetest_rule ) );
+
+               $this->assertSame(
+                       '.a-sweet-rule{color:var(--sweet-color);background-color:purple;}#an-even-sweeter-rule > marquee{color:var(--sweet-color);background-color:purple;}.the-sweetest-rule-of-all a{color:var(--sweet-color);background-color:purple;}',
+                       $a_sweet_processor->get_css(
+                               array(
+                                       'optimize' => false,
+                                       'prettify' => false,
+                               )
+                       )
+               );
+       }
+
+       /**
+        * Tests that 'optimized' CSS is output, that is, that duplicate CSS rules are combined under their corresponding selectors.
+        *
+        * @ticket 56467
+        *
+        * @covers ::get_css
+        */
+       public function test_should_optimize_css_output_by_default() {
+               $a_sweet_rule = new WP_Style_Engine_CSS_Rule(
+                       '.a-sweet-rule',
+                       array(
+                               'color'            => 'var(--sweet-color)',
+                               'background-color' => 'purple',
+                       )
+               );
+
+               $a_sweeter_rule = new WP_Style_Engine_CSS_Rule(
+                       '#an-even-sweeter-rule > marquee',
+                       array(
+                               'color'            => 'var(--sweet-color)',
+                               'background-color' => 'purple',
+                       )
+               );
+
+               $a_sweet_processor = new WP_Style_Engine_Processor();
+               $a_sweet_processor->add_rules( array( $a_sweet_rule, $a_sweeter_rule ) );
+
+               $this->assertSame(
+                       '.a-sweet-rule,#an-even-sweeter-rule > marquee{color:var(--sweet-color);background-color:purple;}',
+                       $a_sweet_processor->get_css( array( 'prettify' => false ) )
+               );
+       }
+
+       /**
+        * Tests that incoming CSS rules are merged with existing CSS rules.
+        *
+        * @ticket 56467
+        *
+        * @covers ::add_rules
+        */
+       public function test_should_combine_previously_added_css_rules() {
+               $a_lovely_processor = new WP_Style_Engine_Processor();
+               $a_lovely_rule      = new WP_Style_Engine_CSS_Rule(
+                       '.a-lovely-rule',
+                       array(
+                               'border-color' => 'purple',
+                       )
+               );
+               $a_lovely_processor->add_rules( $a_lovely_rule );
+               $a_lovelier_rule = new WP_Style_Engine_CSS_Rule(
+                       '.a-lovelier-rule',
+                       array(
+                               'border-color' => 'purple',
+                       )
+               );
+               $a_lovely_processor->add_rules( $a_lovelier_rule );
+
+               $this->assertSame(
+                       '.a-lovely-rule,.a-lovelier-rule{border-color:purple;}',
+                       $a_lovely_processor->get_css( array( 'prettify' => false ) ),
+                       'Return value of get_css() does not match expectations when combining 2 CSS rules'
+               );
+
+               $a_most_lovely_rule = new WP_Style_Engine_CSS_Rule(
+                       '.a-most-lovely-rule',
+                       array(
+                               'border-color' => 'purple',
+                       )
+               );
+               $a_lovely_processor->add_rules( $a_most_lovely_rule );
+
+               $a_perfectly_lovely_rule = new WP_Style_Engine_CSS_Rule(
+                       '.a-perfectly-lovely-rule',
+                       array(
+                               'border-color' => 'purple',
+                       )
+               );
+               $a_lovely_processor->add_rules( $a_perfectly_lovely_rule );
+
+               $this->assertSame(
+                       '.a-lovely-rule,.a-lovelier-rule,.a-most-lovely-rule,.a-perfectly-lovely-rule{border-color:purple;}',
+                       $a_lovely_processor->get_css( array( 'prettify' => false ) ),
+                       'Return value of get_css() does not match expectations when combining 4 CSS rules'
+               );
+       }
+}
</ins><span class="cx" style="display: block; padding: 0 10px">Property changes on: trunk/tests/phpunit/tests/style-engine/wpStyleEngineProcessor.php
</span><span class="cx" style="display: block; padding: 0 10px">___________________________________________________________________
</span></span></pre></div>
<a id="svneolstyle"></a>
<div class="addfile"><h4 style="background-color: #eee; color: inherit; margin: 1em 0; padding: 1.3em; font-size: 115%">Added: svn:eol-style</h4></div>
<ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+native
</ins><span class="cx" style="display: block; padding: 0 10px">\ No newline at end of property
</span></div>

</body>
</html>