Resolve #3188912 "Incompatibility with webp"

Closes #3188912

src/PathProcessor/PathProcessorAvifImageStyles.php

+<?php
+
+namespace Drupal\avif\PathProcessor;
+
+use Drupal\Core\PathProcessor\InboundPathProcessorInterface;
+use Drupal\Core\StreamWrapper\StreamWrapperManagerInterface;
+use Symfony\Component\HttpFoundation\Request;
+
+/**
+ * Defines a path processor to rewrite image styles URLs for avif.
+ *
+ * @see \Drupal\image\PathProcessor\PathProcessorImageStyles
+ */
+class PathProcessorAvifImageStyles implements InboundPathProcessorInterface {
+
+  /**
+   * The stream wrapper manager service.
+   *
+   * @var \Drupal\Core\StreamWrapper\StreamWrapperManagerInterface
+   */
+  protected $streamWrapperManager;
+
+  /**
+   * Constructs a new PathProcessorAvifImageStyles object.
+   *
+   * @param \Drupal\Core\StreamWrapper\StreamWrapperManagerInterface $stream_wrapper_manager
+   *   The stream wrapper manager service.
+   */
+  public function __construct(StreamWrapperManagerInterface $stream_wrapper_manager) {
+    $this->streamWrapperManager = $stream_wrapper_manager;
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function processInbound($path, Request $request) {
+    $directory_path = $this->streamWrapperManager->getViaScheme('public')->getDirectoryPath();
+    if (strpos($path, '/avif/' . $directory_path . '/styles/') === 0) {
+      $path_prefix = '/avif/' . $directory_path . '/styles/';
+    }
+    else {
+      return $path;
+    }
+
+    // Strip out path prefix.
+    $rest = preg_replace('|^' . preg_quote($path_prefix, '|') . '|', '', $path);
+
+    // Get the image style, scheme and path.
+    if (substr_count($rest, '/') >= 2) {
+      [$image_style, $scheme, $file] = explode('/', $rest, 3);
+
+      // Set the file as query parameter.
+      $request->query->set('file', $file);
+
+      return $path_prefix . $image_style . '/' . $scheme;
+    }
+    else {
+      return $path;
+    }
+  }
+
+}