1 files changed, 70 insertions, 0 deletions
diff --git a/dom/encoding/TextEncoderStream.h b/dom/encoding/TextEncoderStream.h
new file mode 100644
index 0000000000..fad97ceba5
--- /dev/null
+++ b/dom/encoding/TextEncoderStream.h
@@ -0,0 +1,70 @@
+/* -*- 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 DOM_ENCODING_TEXTENCODERSTREAM_H_
+#define DOM_ENCODING_TEXTENCODERSTREAM_H_
+
+#include "js/TypeDecls.h"
+#include "mozilla/Attributes.h"
+#include "mozilla/ErrorResult.h"
+#include "mozilla/dom/BindingDeclarations.h"
+#include "nsCycleCollectionParticipant.h"
+#include "nsWrapperCache.h"
+
+class nsIGlobalObject;
+
+namespace mozilla {
+
+class Decoder;
+
+namespace dom {
+
+class ReadableStream;
+class WritableStream;
+class TransformStream;
+
+}  // namespace dom
+
+}  // namespace mozilla
+
+namespace mozilla::dom {
+
+class TextEncoderStream final : public nsISupports, public nsWrapperCache {
+ public:
+  NS_DECL_CYCLE_COLLECTING_ISUPPORTS
+  NS_DECL_CYCLE_COLLECTION_WRAPPERCACHE_CLASS(TextEncoderStream)
+
+ public:
+  TextEncoderStream(nsISupports* aGlobal, TransformStream& aStream);
+
+  nsISupports* GetParentObject() const { return mGlobal; }
+
+  JSObject* WrapObject(JSContext* aCx,
+                       JS::Handle<JSObject*> aGivenProto) override;
+
+  mozilla::Decoder* Decoder() { return mDecoder.get(); }
+
+  // TODO: Mark as MOZ_CAN_RUN_SCRIPT when IDL constructors can be (bug 1749042)
+  MOZ_CAN_RUN_SCRIPT_BOUNDARY static already_AddRefed<TextEncoderStream>
+  Constructor(const GlobalObject& aGlobal, ErrorResult& aRv);
+
+  ReadableStream* Readable() const;
+
+  WritableStream* Writable() const;
+
+  void GetEncoding(nsCString& aRetVal) const;
+
+ private:
+  ~TextEncoderStream();
+
+  nsCOMPtr<nsISupports> mGlobal;
+  RefPtr<TransformStream> mStream;
+  mozilla::UniquePtr<mozilla::Decoder> mDecoder;
+};
+
+}  // namespace mozilla::dom
+
+#endif  // DOM_ENCODING_TEXTENCODERSTREAM_H_