Merge pull request #152 from SudoPlz/sudoplz/fresco-cache-in-rn-images-experiment

feat(react-image): add a hook to customize ImageRequestBuilder in ReactImageView

Author: SudoPlz

packages/react-native/ReactAndroid/src/main/java/com/facebook/react/views/image/ReactImageRequestBuilderHook.kt

@@ -0,0 +1,38 @@
+/*
+ * Copyright (c) Meta Platforms, Inc. and affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ */
+
+package com.facebook.react.views.image
+
+import android.net.Uri
+import com.facebook.imagepipeline.request.ImageRequestBuilder
+
+/**
+ * Global hook for mutating [ImageRequestBuilder] instances created by [ReactImageView].
+ *
+ * This is a no-op unless a hook is registered via [setHook].
+ */
+public object ReactImageRequestBuilderHook {
+  public fun interface Hook {
+    public fun apply(sourceUri: Uri, imageRequestBuilder: ImageRequestBuilder)
+  }
+
+  @Volatile private var hook: Hook? = null
+
+  @JvmStatic
+  public fun setHook(newHook: Hook?) {
+    hook = newHook
+  }
+
+  @JvmStatic
+  public fun clearHook() {
+    hook = null
+  }
+
+  internal fun apply(sourceUri: Uri, imageRequestBuilder: ImageRequestBuilder) {
+    hook?.apply(sourceUri, imageRequestBuilder)
+  }
+}

packages/react-native/ReactAndroid/src/main/java/com/facebook/react/views/image/ReactImageView.kt

@@ -482,6 +482,7 @@ public class ReactImageView(
     } else {
       imageRequestBuilder.setCacheChoice(ImageRequest.CacheChoice.DEFAULT);
     }
+    ReactImageRequestBuilderHook.apply(uri, imageRequestBuilder)
 
     val imageRequest: ImageRequest =
         ReactNetworkImageRequest.fromBuilderWithHeaders(imageRequestBuilder, headers, cacheControl)
@@ -518,6 +519,7 @@ public class ReactImageView(
       } else {
         cachedImageRequestBuilder.setCacheChoice(ImageRequest.CacheChoice.DEFAULT);
       }
+      ReactImageRequestBuilderHook.apply(cachedSource.uri, cachedImageRequestBuilder)
 
       val cachedImageRequest = cachedImageRequestBuilder.build()
       builder.setLowResImageRequest(cachedImageRequest)