From e4b36b1da12d02b85f2601a31f8c24bf07673094 Mon Sep 17 00:00:00 2001
From: Jon Surrell <sirreal@users.noreply.github.com>
Date: Tue, 24 Sep 2024 18:14:11 +0200
Subject: [PATCH] Move a11y HTML printing code to 6.7 compat directory

This code is needed for compatibility with WordPress < 6.7.
The filter should only be registered if the Core filter will not run,
otherwise redundant elements are printed.

See:

https://github.com/WordPress/wordpress-develop/pull/7405
---
 lib/compat/wordpress-6.7/script-modules.php | 43 +++++++++++++++++++++
 lib/experimental/script-modules.php         | 41 --------------------
 2 files changed, 43 insertions(+), 41 deletions(-)

diff --git a/lib/compat/wordpress-6.7/script-modules.php b/lib/compat/wordpress-6.7/script-modules.php
index 0a440ec81688d..2282a3d4bd5ac 100644
--- a/lib/compat/wordpress-6.7/script-modules.php
+++ b/lib/compat/wordpress-6.7/script-modules.php
@@ -102,3 +102,46 @@ function () {
 	},
 	20
 );
+
+/**
+ * Prints HTML for the a11y Script Module.
+ *
+ * a11y relies on some DOM elements to use as ARIA live regions.
+ * Ideally, these elements are part of the initial HTML of the page
+ * so that accessibility tools can find them and observe updates.
+ */
+function gutenberg_a11y_script_module_html() {
+	$a11y_module_available = false;
+
+	$get_marked_for_enqueue = new ReflectionMethod( 'WP_Script_Modules', 'get_marked_for_enqueue' );
+	$get_marked_for_enqueue->setAccessible( true );
+	$get_import_map = new ReflectionMethod( 'WP_Script_Modules', 'get_import_map' );
+	$get_import_map->setAccessible( true );
+
+	foreach ( array_keys( $get_marked_for_enqueue->invoke( wp_script_modules() ) ) as $id ) {
+		if ( '@wordpress/a11y' === $id ) {
+			$a11y_module_available = true;
+			break;
+		}
+	}
+	if ( ! $a11y_module_available ) {
+		foreach ( array_keys( $get_import_map->invoke( wp_script_modules() )['imports'] ) as $id ) {
+			if ( '@wordpress/a11y' === $id ) {
+				$a11y_module_available = true;
+				break;
+			}
+		}
+	}
+	if ( ! $a11y_module_available ) {
+		return;
+	}
+	echo '<div style="position:absolute;margin:-1px;padding:0;height:1px;width:1px;overflow:hidden;clip-path:inset(50%);border:0;word-wrap:normal !important;">'
+		. '<p id="a11y-speak-intro-text" class="a11y-speak-intro-text" hidden>' . esc_html__( 'Notifications', 'default' ) . '</p>'
+		. '<div id="a11y-speak-assertive" class="a11y-speak-region" aria-live="assertive" aria-relevant="additions text" aria-atomic="true"></div>'
+		. '<div id="a11y-speak-polite" class="a11y-speak-region" aria-live="polite" aria-relevant="additions text" aria-atomic="true"></div>'
+		. '</div>';
+}
+if ( ! method_exists( 'WP_Script_Modules', 'print_a11y_script_module_html' ) ) {
+	add_action( 'wp_footer', 'gutenberg_a11y_script_module_html' );
+	add_action( 'admin_footer', 'gutenberg_a11y_script_module_html' );
+}
diff --git a/lib/experimental/script-modules.php b/lib/experimental/script-modules.php
index fe23786fc0362..5a14e1418ed6d 100644
--- a/lib/experimental/script-modules.php
+++ b/lib/experimental/script-modules.php
@@ -200,44 +200,3 @@ function gutenberg_dequeue_module( $module_identifier ) {
 	_deprecated_function( __FUNCTION__, 'Gutenberg 17.6.0', 'wp_dequeue_script_module' );
 	wp_script_modules()->dequeue( $module_identifier );
 }
-
-/**
- * Prints HTML for the a11y Script Module.
- *
- * a11y relies on some DOM elements to use as ARIA live regions.
- * Ideally, these elements are part of the initial HTML of the page
- * so that accessibility tools can find them and observe updates.
- */
-function gutenberg_a11y_script_module_html() {
-	$a11y_module_available = false;
-
-	$get_marked_for_enqueue = new ReflectionMethod( 'WP_Script_Modules', 'get_marked_for_enqueue' );
-	$get_marked_for_enqueue->setAccessible( true );
-	$get_import_map = new ReflectionMethod( 'WP_Script_Modules', 'get_import_map' );
-	$get_import_map->setAccessible( true );
-
-	foreach ( array_keys( $get_marked_for_enqueue->invoke( wp_script_modules() ) ) as $id ) {
-		if ( '@wordpress/a11y' === $id ) {
-			$a11y_module_available = true;
-			break;
-		}
-	}
-	if ( ! $a11y_module_available ) {
-		foreach ( array_keys( $get_import_map->invoke( wp_script_modules() )['imports'] ) as $id ) {
-			if ( '@wordpress/a11y' === $id ) {
-				$a11y_module_available = true;
-				break;
-			}
-		}
-	}
-	if ( ! $a11y_module_available ) {
-		return;
-	}
-	echo '<div style="position:absolute;margin:-1px;padding:0;height:1px;width:1px;overflow:hidden;clip-path:inset(50%);border:0;word-wrap:normal !important;">'
-		. '<p id="a11y-speak-intro-text" class="a11y-speak-intro-text" hidden>' . esc_html__( 'Notifications', 'default' ) . '</p>'
-		. '<div id="a11y-speak-assertive" class="a11y-speak-region" aria-live="assertive" aria-relevant="additions text" aria-atomic="true"></div>'
-		. '<div id="a11y-speak-polite" class="a11y-speak-region" aria-live="polite" aria-relevant="additions text" aria-atomic="true"></div>'
-		. '</div>';
-}
-add_action( 'wp_footer', 'gutenberg_a11y_script_module_html' );
-add_action( 'admin_footer', 'gutenberg_a11y_script_module_html' );