Editor: disable `shadow.defaultPresets` for classic themes.

With this change default shadow presets are never shown for classic themes, and classic themes have no options for adding custom ones.
This essentially reverts [57717] and [57827] / [57828], which had unintended consequences.

Props ajlende, oandregal, madhudollu, swissspidy, get_dave, andrewserong, desrosj.
Fixes #60815.
Built from https://develop.svn.wordpress.org/trunk@57885


git-svn-id: http://core.svn.wordpress.org/trunk@57386 1a063a9b-81f0-0310-95a4-ce76da25c4cd

wp-includes/class-wp-theme-json-resolver.php

@@ -312,6 +312,17 @@ class WP_Theme_JSON_Resolver {
 			}
 			$theme_support_data['settings']['color']['defaultGradients'] = $default_gradients;
 
+			if ( ! isset( $theme_support_data['settings']['shadow'] ) ) {
+				$theme_support_data['settings']['shadow'] = array();
+			}
+			/*
+			 * Shadow presets are explicitly disabled for classic themes until a
+			 * decision is made for whether the default presets should match the
+			 * other presets or if they should be disabled by default in classic
+			 * themes. See https://github.com/WordPress/gutenberg/issues/59989.
+			 */
+			$theme_support_data['settings']['shadow']['defaultPresets'] = false;
+
 			// Allow themes to enable link color setting via theme_support.
 			if ( current_theme_supports( 'link-color' ) ) {
 				$theme_support_data['settings']['color']['link'] = true;

wp-includes/class-wp-theme-json.php

@@ -658,7 +658,7 @@ class WP_Theme_JSON {
 	 * @since 6.0.0
 	 * @since 6.2.0 Added `dimensions.minHeight` and `position.sticky`.
 	 * @since 6.4.0 Added `background.backgroundImage`.
-	 * @since 6.5.0 Added `background.backgroundSize`, `dimensions.aspectRatio`, and `shadow.defaultPresets`.
+	 * @since 6.5.0 Added `background.backgroundSize` and `dimensions.aspectRatio`.
 	 * @var array
 	 */
 	const APPEARANCE_TOOLS_OPT_INS = array(
@@ -679,7 +679,6 @@ class WP_Theme_JSON {
 		array( 'spacing', 'margin' ),
 		array( 'spacing', 'padding' ),
 		array( 'typography', 'lineHeight' ),
-		array( 'shadow', 'defaultPresets' ),
 	);
 
 	/**

wp-includes/theme.json

@@ -191,7 +191,7 @@
 			"text": true
 		},
 		"shadow": {
-			"defaultPresets": false,
+			"defaultPresets": true,
 			"presets": [
 				{
 					"name": "Natural",

wp-includes/version.php

@@ -16,7 +16,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '6.6-alpha-57883';
+$wp_version = '6.6-alpha-57885';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.