From 21ecbc3b0d611819bf35be78c1995d2e6739f1eb Mon Sep 17 00:00:00 2001
From: isabel_brison <isabel_brison@git.wordpress.org>
Date: Thu, 14 Sep 2023 04:56:21 +0000
Subject: [PATCH] Editor: disable default style engine optimisation.

Stops style engine from combining CSS selectors by default so that rule order is preserved.

Props ramonopoly, rajinsharwar, timdix, costdev, audrasjb, SergeyBiryukov, JeffPaul, mukesh27.
Fixes #58811.

Built from https://develop.svn.wordpress.org/trunk@56574


git-svn-id: http://core.svn.wordpress.org/trunk@56086 1a063a9b-81f0-0310-95a4-ce76da25c4cd
---
 wp-includes/script-loader.php                                | 2 +-
 wp-includes/style-engine.php                                 | 4 ++--
 wp-includes/style-engine/class-wp-style-engine-processor.php | 5 +++--
 wp-includes/style-engine/class-wp-style-engine.php           | 2 +-
 wp-includes/version.php                                      | 2 +-
 5 files changed, 8 insertions(+), 7 deletions(-)

diff --git a/wp-includes/script-loader.php b/wp-includes/script-loader.php
index 27f5a3714c..adf309a12f 100644
--- a/wp-includes/script-loader.php
+++ b/wp-includes/script-loader.php
@@ -3053,7 +3053,7 @@ function wp_enqueue_block_support_styles( $style, $priority = 10 ) {
  *     Default empty array.
  *
  *     @type bool $optimize Whether to optimize the CSS output, e.g., combine rules.
- *                          Default true.
+ *                          Default false.
  *     @type bool $prettify Whether to add new lines and indents to output.
  *                          Default to whether the `SCRIPT_DEBUG` constant is defined.
  * }
diff --git a/wp-includes/style-engine.php b/wp-includes/style-engine.php
index 4a93d2cc5a..5b5545c85e 100644
--- a/wp-includes/style-engine.php
+++ b/wp-includes/style-engine.php
@@ -130,7 +130,7 @@ function wp_style_engine_get_styles( $block_styles, $options = array() ) {
  *                                 e.g. 'block-supports' or 'global-styles'. Default 'block-supports'.
  *                                 When set, the style engine will attempt to store the CSS rules.
  *     @type bool        $optimize Whether to optimize the CSS output, e.g. combine rules.
- *                                 Default true.
+ *                                 Default false.
  *     @type bool        $prettify Whether to add new lines and indents to output.
  *                                 Defaults to whether the `SCRIPT_DEBUG` constant is defined.
  * }
@@ -178,7 +178,7 @@ function wp_style_engine_get_stylesheet_from_css_rules( $css_rules, $options = a
  *     Optional. An array of options. Default empty array.
  *
  *     @type bool $optimize Whether to optimize the CSS output, e.g. combine rules.
- *                          Default true.
+ *                          Default false.
  *     @type bool $prettify Whether to add new lines and indents to output.
  *                          Defaults to whether the `SCRIPT_DEBUG` constant is defined.
  * }
diff --git a/wp-includes/style-engine/class-wp-style-engine-processor.php b/wp-includes/style-engine/class-wp-style-engine-processor.php
index c603d1c509..0778748498 100644
--- a/wp-includes/style-engine/class-wp-style-engine-processor.php
+++ b/wp-includes/style-engine/class-wp-style-engine-processor.php
@@ -85,12 +85,13 @@ class WP_Style_Engine_Processor {
 	 * Gets the CSS rules as a string.
 	 *
 	 * @since 6.1.0
+	 * @since 6.4.0 The Optimization is no longer the default.
 	 *
 	 * @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 true.
+	 *                          Default false.
 	 *     @type bool $prettify Whether to add new lines and indents to output.
 	 *                          Defaults to whether the `SCRIPT_DEBUG` constant is defined.
 	 * }
@@ -98,7 +99,7 @@ class WP_Style_Engine_Processor {
 	 */
 	public function get_css( $options = array() ) {
 		$defaults = array(
-			'optimize' => true,
+			'optimize' => false,
 			'prettify' => defined( 'SCRIPT_DEBUG' ) && SCRIPT_DEBUG,
 		);
 		$options  = wp_parse_args( $options, $defaults );
diff --git a/wp-includes/style-engine/class-wp-style-engine.php b/wp-includes/style-engine/class-wp-style-engine.php
index bdaae4a1f7..da1afe42ca 100644
--- a/wp-includes/style-engine/class-wp-style-engine.php
+++ b/wp-includes/style-engine/class-wp-style-engine.php
@@ -624,7 +624,7 @@ final class WP_Style_Engine {
 	 *                                 e.g. 'block-supports' or 'global-styles'. Default 'block-supports'.
 	 *                                 When set, the style engine will attempt to store the CSS rules.
 	 *     @type bool        $optimize Whether to optimize the CSS output, e.g. combine rules.
-	 *                                 Default true.
+	 *                                 Default false.
 	 *     @type bool        $prettify Whether to add new lines and indents to output.
 	 *                                 Defaults to whether the `SCRIPT_DEBUG` constant is defined.
 	 * }
diff --git a/wp-includes/version.php b/wp-includes/version.php
index 7a9eaef592..9ebf26b532 100644
--- a/wp-includes/version.php
+++ b/wp-includes/version.php
@@ -16,7 +16,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '6.4-alpha-56573';
+$wp_version = '6.4-alpha-56574';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.