Merge pull request #266 from 10up/feature/overrides-location

Move Overrides out of theme and into functionality plugin

mu-plugins/10up-plugin/includes/classes/Overrides.php

@@ -0,0 +1,98 @@
+<?php
+/**
+ * This file contains hooks and functions that override the behavior of WP Core.
+ *
+ * @package TenUpPlugin
+ */
+
+namespace TenUpPlugin;
+
+/**
+ * Overrides class to manage WordPress core behavior modifications.
+ */
+class Overrides extends Module {
+
+	/**
+	 * Used to alter the order in which classes are initialized.
+	 *
+	 * @var int The priority of the module.
+	 */
+	public $load_order = 5;
+
+	/**
+	 * Checks whether the Module should run within the current context.
+	 *
+	 * @return bool
+	 */
+	public function can_register(): bool {
+		return true;
+	}
+
+	/**
+	 * Connects the Module with WordPress using Hooks and/or Filters.
+	 *
+	 * @return void
+	 */
+	public function register(): void {
+		// Remove the Emoji detection script.
+		remove_action( 'wp_head', 'print_emoji_detection_script', 7 );
+
+		// Remove inline Emoji detection script.
+		remove_action( 'admin_print_scripts', 'print_emoji_detection_script' );
+
+		// Remove Emoji-related styles from front end and back end.
+		remove_action( 'wp_print_styles', 'print_emoji_styles' );
+		remove_action( 'admin_print_styles', 'print_emoji_styles' );
+
+		// Remove Emoji-to-static-img conversion.
+		remove_filter( 'the_content_feed', 'wp_staticize_emoji' );
+		remove_filter( 'comment_text_rss', 'wp_staticize_emoji' );
+		remove_filter( 'wp_mail', 'wp_staticize_emoji_for_email' );
+
+		add_filter( 'tiny_mce_plugins', [ $this, 'disable_emojis_tinymce' ] );
+		add_filter( 'wp_resource_hints', [ $this, 'disable_emoji_dns_prefetch' ], 10, 2 );
+
+		// Remove WordPress generator meta.
+		remove_action( 'wp_head', 'wp_generator' );
+		// Remove Windows Live Writer manifest link.
+		remove_action( 'wp_head', 'wlwmanifest_link' );
+		// Remove the link to Really Simple Discovery service endpoint.
+		remove_action( 'wp_head', 'rsd_link' );
+	}
+
+	/**
+	 * Filter function used to remove the TinyMCE emoji plugin.
+	 *
+	 * @link https://developer.wordpress.org/reference/hooks/tiny_mce_plugins/
+	 *
+	 * @param  array $plugins An array of default TinyMCE plugins.
+	 * @return array          An array of TinyMCE plugins, without wpemoji.
+	 */
+	public function disable_emojis_tinymce( array $plugins ): array {
+		if ( in_array( 'wpemoji', $plugins, true ) ) {
+			return array_diff( $plugins, [ 'wpemoji' ] );
+		}
+
+		return $plugins;
+	}
+
+	/**
+	 * Remove emoji CDN hostname from DNS prefetching hints.
+	 *
+	 * @link https://developer.wordpress.org/reference/hooks/emoji_svg_url/
+	 *
+	 * @param  array  $urls          URLs to print for resource hints.
+	 * @param  string $relation_type The relation type the URLs are printed for.
+	 * @return array                 Difference betwen the two arrays.
+	 */
+	public function disable_emoji_dns_prefetch( array $urls, string $relation_type ): array {
+		if ( 'dns-prefetch' === $relation_type ) {
+			/** This filter is documented in wp-includes/formatting.php */
+			$emoji_svg_url = apply_filters( 'emoji_svg_url', 'https://s.w.org/images/core/emoji/2/svg/' );
+
+			$urls = array_values( array_diff( $urls, [ $emoji_svg_url ] ) );
+		}
+
+		return $urls;
+	}
+}

themes/10up-theme/functions.php

@@ -28,7 +28,6 @@
 }
 
 require_once TENUP_THEME_INC . 'core.php';
-require_once TENUP_THEME_INC . 'overrides.php';
 require_once TENUP_THEME_INC . 'template-tags.php';
 require_once TENUP_THEME_INC . 'utility.php';
 require_once TENUP_THEME_INC . 'blocks.php';