1 files changed, 48 insertions, 0 deletions
diff --git a/dom/streams/ReadIntoRequest.h b/dom/streams/ReadIntoRequest.h
new file mode 100644
index 0000000000..9be3d2c027
--- /dev/null
+++ b/dom/streams/ReadIntoRequest.h
@@ -0,0 +1,48 @@
+
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim:set ts=2 sw=2 sts=2 et cindent: */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#ifndef mozilla_dom_ReadIntoRequest_h
+#define mozilla_dom_ReadIntoRequest_h
+
+#include "js/TypeDecls.h"
+#include "js/Value.h"
+#include "mozilla/ErrorResult.h"
+#include "mozilla/LinkedList.h"
+#include "mozilla/RefPtr.h"
+#include "nsCycleCollectionParticipant.h"
+#include "nsISupportsImpl.h"
+
+namespace mozilla::dom {
+
+// This list element needs to be cycle collected by owning structures.
+struct ReadIntoRequest : public nsISupports,
+                         public LinkedListElement<RefPtr<ReadIntoRequest>> {
+  NS_DECL_CYCLE_COLLECTING_ISUPPORTS
+  NS_DECL_CYCLE_COLLECTION_CLASS(ReadIntoRequest)
+
+  // An algorithm taking a chunk, called when a chunk is available for reading
+  virtual void ChunkSteps(JSContext* aCx, JS::Handle<JS::Value> aChunk,
+                          ErrorResult& aRv) = 0;
+
+  // An algorithm taking a chunk or undefined, called when no chunks are
+  // available because the stream is closed
+  MOZ_CAN_RUN_SCRIPT
+  virtual void CloseSteps(JSContext* aCx, JS::Handle<JS::Value> aChunk,
+                          ErrorResult& aRv) = 0;
+
+  // An algorithm taking a JavaScript value, called when no chunks are available
+  // because the stream is errored
+  virtual void ErrorSteps(JSContext* aCx, JS::Handle<JS::Value> e,
+                          ErrorResult& aRv) = 0;
+
+ protected:
+  virtual ~ReadIntoRequest() = default;
+};
+
+}  // namespace mozilla::dom
+
+#endif