Move Fresco plugin to oss directory

Summary: Moved the fresco plugin folder to open source directory

Reviewed By: passy

Differential Revision: D14126407

fbshipit-source-id: 15b2d1698e18b951742ec37ca94642e6511094b0

src/plugins/fresco/api.js

@@ -0,0 +1,67 @@
+/**
+ * Copyright 2018-present Facebook.
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ * @format
+ */
+
+export type ImageId = string;
+
+// Listing images
+
+export type CacheInfo = {|
+  cacheType: string,
+  clearKey?: null, // set this if this cache level supports clear(<key>)
+  sizeBytes: number,
+  maxSizeBytes?: number,
+  imageIds: Array<ImageId>,
+|};
+
+export type ImagesList = Array<CacheInfo>;
+
+// The iOS Flipper api does not support a top-level array, so we wrap it in an object
+export type ImagesListResponse = {|
+  levels: ImagesList,
+|};
+
+// listImages() -> ImagesListResponse
+
+// Getting details on a specific image
+
+export type ImageBytes = string;
+
+export type ImageData = {|
+  imageId: ImageId,
+  uri?: string,
+  width: number,
+  height: number,
+  sizeBytes: number,
+  data: ImageBytes,
+|};
+
+// getImage({imageId: string}) -> ImageData
+
+// Subscribing to image events (requests and prefetches)
+
+export type Timestamp = number;
+
+export type ViewportData = {|
+  width: number,
+  height: number,
+  scanDisplayTime: {[scan_number: number]: Timestamp},
+|};
+
+export type ImageEvent = {
+  imageIds: Array<ImageId>,
+  attribution: Array<string>,
+  startTime: Timestamp,
+  endTime: Timestamp,
+  source: string,
+  viewport?: ViewportData, // not set for prefetches
+};
+
+// Misc
+
+export type FrescoDebugOverlayEvent = {|
+  enabled: boolean,
+|};