smush-override-calculate-image-sizes.php

<?php
/**
 * Plugin Name: [Smush] - Override calculate image sizes
 * Plugin URI: https://premium.wpmudev.org/
 * Description: Overrides default filter `wp_calculate_image_sizes`
 * Task: 0/11289012348292/1169468395067145
 * Version: 1.0.0
 * Author: Panos Lyrakis @ WPMUDEV
 * Author URI: https://premium.wpmudev.org/
 * License: GPLv2 or later
 *
 * @package Forminator
 */

if ( ! defined( 'ABSPATH' ) || ( defined( 'WP_CLI' ) && WP_CLI ) ) {
	return;
}

add_action(
	'init',
	function() {

		// Remove the default `wp_calculate_image_sizes` filter.
		global $wp_filter;
		$tag         = 'wp_calculate_image_sizes';
		$hook_method = 'update_image_sizes';
		$hook_class  = 'Smush\\Core\\Modules\\CDN';

		if ( ! isset( $wp_filter[ $tag ] ) ) {
			return;
		}

		foreach ( $wp_filter[ $tag ]->callbacks as $key => $callback_array ) {
			foreach ( $callback_array as $c_key => $callback ) {
				if ( substr_compare( $c_key, $hook_method, strlen( $c_key ) - strlen( $hook_method ), strlen( $hook_method ) ) === 0 ) {
					if ( $callback['function'][0] instanceof $hook_class ) {
						unset( $wp_filter[ $tag ]->callbacks[ $key ][ $c_key ] );
					}
				}
			}
		}

		add_filter(
			'wp_calculate_image_sizes',
			function( $sizes, $size ) {

				$content_width = ( isset( $GLOBALS['content_width'] ) && ! empty( $GLOBALS['content_width'] ) ) ? (int) $GLOBALS['content_width'] : 1920;
				$resize_sizes  = get_option( 'wp-smush-resize_sizes', array() );

				if ( isset( $resize_sizes['width'] ) && $resize_sizes['width'] < $content_width ) {
					$content_width = $resize_sizes['width'];
				}

				if ( is_array( $size ) && ! empty( $size ) && $size[0] < $content_width ) {

					return $sizes;
				}

				return sprintf( '(max-width: %1$dpx) 100vw, %1$dpx', $content_width );

			},
			1,
			2
		);

	}
);