emoji-detection-script-deferred.php

<?php
/**
 * Emoji Detection Script Deferred Plugin for WordPress
 *
 * @package   EmojiDetectionScriptDeferred
 * @author    Weston Ruter
 * @license   GPL-2.0-or-later
 *
 * @wordpress-plugin
 * Plugin Name: Emoji Detection Script Deferred
 * Plugin URI: https://core.trac.wordpress.org/ticket/63842
 * Description: Replaces inline blocking script with a JSON script for settings and script module(s) for the emoji detection logic. Polyfill to implement <a href="https://core.trac.wordpress.org/ticket/63842">#63842</a>.
 * Requires at least: 6.8
 * Requires PHP: 7.2
 * Version: 0.1.0
 * Author: Weston Ruter
 * Author URI: https://weston.ruter.net/
 * License: GPLv2 or later
 * License URI: https://www.gnu.org/licenses/old-licenses/gpl-2.0.html
 * Update URI: https://gist.github.com/westonruter/6b201c637e40d6d3b865e5cf7548c59e
 * Gist Plugin URI: https://gist.github.com/westonruter/6b201c637e40d6d3b865e5cf7548c59e
 * Primary Branch: main
 */

namespace EmojiDetectionScriptDeferred;

if ( isset( $_GET['emoji_detection_script_deferred_disabled'] ) ) { // phpcs:ignore WordPress.Security.NonceVerification.Recommended
	return;
}

remove_action( 'wp_head', 'print_emoji_detection_script', 7 );
add_action( 'wp_head', __NAMESPACE__ . '\print_deferred_emoji_detection_script', 7 );

/**
 * Prints deferred inline Emoji detection script.
 *
 * This is a forked version of `print_emoji_detection_script()` and `_print_emoji_detection_script()` in core.
 *
 * @see \print_emoji_detection_script()
 * @see \_print_emoji_detection_script()
 * @link https://github.com/WordPress/wordpress-develop/blob/450524a5a7a0708875f82ee5e75bb90c04049dbe/src/wp-includes/formatting.php#L6077-L6143
 */
function print_deferred_emoji_detection_script(): void {
	static $printed = false;
	if ( $printed ) {
		return;
	}
	$printed = true;

	$settings = array(
		/**
		 * Filters the URL where emoji png images are hosted.
		 *
		 * @since 4.2.0
		 *
		 * @param string $url The emoji base URL for png images.
		 */
		'baseUrl' => apply_filters( 'emoji_url', 'https://s.w.org/images/core/emoji/16.0.1/72x72/' ),

		/**
		 * Filters the extension of the emoji png files.
		 *
		 * @since 4.2.0
		 *
		 * @param string $extension The emoji extension for png files. Default .png.
		 */
		'ext'     => apply_filters( 'emoji_ext', '.png' ),

		/**
		 * Filters the URL where emoji SVG images are hosted.
		 *
		 * @since 4.6.0
		 *
		 * @param string $url The emoji base URL for svg images.
		 */
		'svgUrl'  => apply_filters( 'emoji_svg_url', 'https://s.w.org/images/core/emoji/16.0.1/svg/' ),

		/**
		 * Filters the extension of the emoji SVG files.
		 *
		 * @since 4.6.0
		 *
		 * @param string $extension The emoji extension for svg files. Default .svg.
		 */
		'svgExt'  => apply_filters( 'emoji_svg_ext', '.svg' ),
	);

	$version = 'ver=' . get_bloginfo( 'version' );

	if ( SCRIPT_DEBUG ) {
		$settings['source'] = array(
			/** This filter is documented in wp-includes/class-wp-scripts.php */
			'wpemoji' => apply_filters( 'script_loader_src', includes_url( "js/wp-emoji.js?$version" ), 'wpemoji' ),
			/** This filter is documented in wp-includes/class-wp-scripts.php */
			'twemoji' => apply_filters( 'script_loader_src', includes_url( "js/twemoji.js?$version" ), 'twemoji' ),
		);
	} else {
		$settings['source'] = array(
			/** This filter is documented in wp-includes/class-wp-scripts.php */
			'concatemoji' => apply_filters( 'script_loader_src', includes_url( "js/wp-emoji-release.min.js?$version" ), 'concatemoji' ),
		);
	}

	// --------- BEGIN CORE PATCH ---------
	wp_print_inline_script_tag(
		wp_json_encode( $settings, JSON_HEX_TAG | JSON_UNESCAPED_SLASHES ),
		array(
			'id'   => 'wp-emoji-settings',
			'type' => 'application/json',
		)
	);

	wp_print_inline_script_tag(
		'window._wpemojiSettings = /** @type {WPEmojiSettings} */ (JSON.parse( document.getElementById( \'wp-emoji-settings\' ).textContent ) );',
		array(
			'type' => 'module',
		)
	);

	wp_print_inline_script_tag(
		file_get_contents( ABSPATH . WPINC . '/js/wp-emoji-loader' . wp_scripts_get_suffix() . '.js' ),
		array(
			'type' => 'module',
		)
	);
	// --------- END CORE PATCH ---------
}