From feb1de178f64afd1fe4c45de40dc6d61caccee8c Mon Sep 17 00:00:00 2001
From: Luis Felipe Zaguini <luisfelipezaguini@gmail.com>
Date: Thu, 17 Mar 2022 19:12:10 -0300
Subject: [PATCH] Separate between registering and enqueueing webfonts

---
 .../wordpress-6.0/class-wp-webfonts.php       | 65 +++++++++++++++----
 .../register-webfonts-from-theme-json.php     |  2 +-
 lib/compat/wordpress-6.0/webfonts.php         |  4 ++
 3 files changed, 59 insertions(+), 12 deletions(-)

diff --git a/lib/compat/wordpress-6.0/class-wp-webfonts.php b/lib/compat/wordpress-6.0/class-wp-webfonts.php
index 04f6e87e6a5da..c8405732bee27 100644
--- a/lib/compat/wordpress-6.0/class-wp-webfonts.php
+++ b/lib/compat/wordpress-6.0/class-wp-webfonts.php
@@ -16,7 +16,15 @@ class WP_Webfonts {
 	 * @access private
 	 * @var array
 	 */
-	private $webfonts = array();
+	private $registered_webfonts = array();
+
+	/**
+	 * An array of enqueued webfonts.
+	 *
+	 * @access private
+	 * @var array
+	 */
+	private $enqueued_webfonts = array();
 
 	/**
 	 * An array of registered providers.
@@ -56,12 +64,30 @@ public function init() {
 	}
 
 	/**
-	 * Get the list of fonts.
+	 * Get the list of registered fonts.
+	 *
+	 * @return array
+	 */
+	public function get_registered_webfonts() {
+			return $this->registered_webfonts;
+	}
+
+	/**
+	 * Get the list of enqueued fonts.
 	 *
 	 * @return array
 	 */
-	public function get_fonts() {
-		return $this->webfonts;
+	public function get_enqueued_webfonts() {
+		return $this->enqueued_webfonts;
+	}
+
+	/**
+	 * Get the list of all fonts.
+	 *
+	 * @return array
+	 */
+	public function get_all_webfonts() {
+		return array_merge( $this->get_registered_webfonts(), $this->get_enqueued_webfonts() );
 	}
 
 	/**
@@ -83,14 +109,31 @@ public function register_font( $font ) {
 		if ( $font ) {
 			$slug = $this->get_font_slug( $font );
 
-			if ( ! isset( $this->webfonts[ $slug ] ) ) {
-				$this->webfonts[ $slug ] = array();
+			if ( ! isset( $this->registered_webfonts[ $slug ] ) ) {
+				$this->registered_webfonts[ $slug ] = array();
 			}
 
-			$this->webfonts[ $slug ][] = $font;
+			$this->registered_webfonts[ $slug ][] = $font;
 		}
 	}
 
+	public function enqueue_font( $font_family ) {
+		$slug = $this->get_font_slug( $font_family );
+
+		if ( isset( $this->enqueued_webfonts[ $slug ] ) ) {
+			_doing_it_wrong( __FUNCTION__, sprintf( __( 'The "%s" font family is already enqueued.' ), $slug ), '6.0.0' );
+			return false;
+		}
+
+		if ( ! isset( $this->registered_webfonts[ $slug ] ) ) {
+			_doing_it_wrong( __FUNCTION__, sprintf( __( 'The "%s" font family is not registered.' ), $slug ), '6.0.0' );
+			return false;
+		}
+
+		$this->enqueued_webfonts[ $slug ] = $this->registered_webfonts[ $slug ];
+		unset( $this->registered_webfonts[ $slug ] );
+	}
+
 	/**
 	 * Get the font slug.
 	 *
@@ -210,7 +253,7 @@ public function register_provider( $provider, $class ) {
 	 */
 	public function generate_and_enqueue_styles() {
 		// Generate the styles.
-		$styles = $this->generate_styles();
+		$styles = $this->generate_styles( $this->get_enqueued_webfonts() );
 
 		// Bail out if there are no styles to enqueue.
 		if ( '' === $styles ) {
@@ -230,7 +273,7 @@ public function generate_and_enqueue_styles() {
 	 */
 	public function generate_and_enqueue_editor_styles() {
 		// Generate the styles.
-		$styles = $this->generate_styles();
+		$styles = $this->generate_styles( $this->get_all_webfonts() );
 
 		// Bail out if there are no styles to enqueue.
 		if ( '' === $styles ) {
@@ -247,14 +290,14 @@ public function generate_and_enqueue_editor_styles() {
 	 *
 	 * @return string $styles Generated styles.
 	 */
-	public function generate_styles() {
+	public function generate_styles( $font_families ) {
 		$styles    = '';
 		$providers = $this->get_providers();
 
 		$webfonts = array();
 
 		// Grab only the font face declarations from $font_families.
-		foreach ( $this->get_fonts() as $font_family ) {
+		foreach ( $font_families as $font_family ) {
 			foreach ( $font_family as $font_face ) {
 				$webfonts[] = $font_face;
 			}
diff --git a/lib/compat/wordpress-6.0/register-webfonts-from-theme-json.php b/lib/compat/wordpress-6.0/register-webfonts-from-theme-json.php
index 9c444001e2cfe..d974c9427f470 100644
--- a/lib/compat/wordpress-6.0/register-webfonts-from-theme-json.php
+++ b/lib/compat/wordpress-6.0/register-webfonts-from-theme-json.php
@@ -62,7 +62,7 @@ function gutenberg_register_webfonts_from_theme_json() {
  * @return array The global styles with missing fonts data.
  */
 function gutenberg_add_registered_webfonts_to_theme_json( $data ) {
-	$font_families_registered = wp_webfonts()->get_fonts();
+	$font_families_registered = wp_webfonts()->get_all_webfonts();
 
 	// Make sure the path to settings.typography.fontFamilies.theme exists
 	// before adding missing fonts.
diff --git a/lib/compat/wordpress-6.0/webfonts.php b/lib/compat/wordpress-6.0/webfonts.php
index f3665766f06f3..24942fedf46eb 100644
--- a/lib/compat/wordpress-6.0/webfonts.php
+++ b/lib/compat/wordpress-6.0/webfonts.php
@@ -97,6 +97,10 @@ function wp_register_webfont( array $webfont ) {
 	wp_webfonts()->register_font( $webfont );
 }
 
+function wp_enqueue_webfont( $font_family ) {
+	wp_webfonts()->enqueue_font( $font_family );
+}
+
 /**
  * Registers a custom font service provider.
  *