Adding upstream version 124.0.1.upstream/124.0.1

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 102 insertions, 0 deletions

diff --git a/dom/streams/TransformerCallbackHelpers.h b/dom/streams/TransformerCallbackHelpers.h
new file mode 100644
index 0000000000..8b12a31b0f
--- /dev/null
+++ b/dom/streams/TransformerCallbackHelpers.h
@@ -0,0 +1,102 @@
+/* -*- 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_STREAMS_TRANSFORMERCALLBACKHELPERS_H_
+#define DOM_STREAMS_TRANSFORMERCALLBACKHELPERS_H_
+
+#include "mozilla/HoldDropJSObjects.h"
+#include "mozilla/dom/TransformerBinding.h"
+#include "nsCycleCollectionParticipant.h"
+
+namespace mozilla::dom {
+
+class Promise;
+
+class TransformerAlgorithmsBase : public nsISupports {
+ public:
+  NS_DECL_CYCLE_COLLECTING_ISUPPORTS
+  NS_DECL_CYCLE_COLLECTION_CLASS(TransformerAlgorithmsBase)
+
+  MOZ_CAN_RUN_SCRIPT virtual already_AddRefed<Promise> TransformCallback(
+      JSContext* aCx, JS::Handle<JS::Value> aChunk,
+      TransformStreamDefaultController& aController, ErrorResult& aRv) = 0;
+
+  MOZ_CAN_RUN_SCRIPT virtual already_AddRefed<Promise> FlushCallback(
+      JSContext* aCx, TransformStreamDefaultController& aController,
+      ErrorResult& aRv) = 0;
+
+ protected:
+  virtual ~TransformerAlgorithmsBase() = default;
+};
+
+// https://streams.spec.whatwg.org/#set-up-transform-stream-default-controller-from-transformer
+class TransformerAlgorithms final : public TransformerAlgorithmsBase {
+ public:
+  NS_DECL_ISUPPORTS_INHERITED
+  NS_DECL_CYCLE_COLLECTION_SCRIPT_HOLDER_CLASS_INHERITED(
+      TransformerAlgorithms, TransformerAlgorithmsBase)
+
+  TransformerAlgorithms(nsIGlobalObject* aGlobal,
+                        JS::Handle<JSObject*> aTransformer,
+                        Transformer& aTransformerDict)
+      : mGlobal(aGlobal), mTransformer(aTransformer) {
+    // Step 4. (Step 2 is implicitly done through the initialization of
+    // mTransformCallback to null)
+    if (aTransformerDict.mTransform.WasPassed()) {
+      mTransformCallback = aTransformerDict.mTransform.Value();
+    }
+
+    // Step 5. (Step 3 is implicitly done through the initialization of
+    // mTransformCallback to null)
+    if (aTransformerDict.mFlush.WasPassed()) {
+      mFlushCallback = aTransformerDict.mFlush.Value();
+    }
+
+    mozilla::HoldJSObjects(this);
+  };
+
+  MOZ_CAN_RUN_SCRIPT already_AddRefed<Promise> TransformCallback(
+      JSContext* aCx, JS::Handle<JS::Value> aChunk,
+      TransformStreamDefaultController& aController, ErrorResult& aRv) override;
+
+  MOZ_CAN_RUN_SCRIPT already_AddRefed<Promise> FlushCallback(
+      JSContext* aCx, TransformStreamDefaultController& aController,
+      ErrorResult& aRv) override;
+
+ protected:
+  ~TransformerAlgorithms() { mozilla::DropJSObjects(this); }
+
+ private:
+  // Virtually const, but are cycle collected
+  nsCOMPtr<nsIGlobalObject> mGlobal;
+  JS::Heap<JSObject*> mTransformer;
+  MOZ_KNOWN_LIVE RefPtr<TransformerTransformCallback> mTransformCallback;
+  MOZ_KNOWN_LIVE RefPtr<TransformerFlushCallback> mFlushCallback;
+};
+
+// https://streams.spec.whatwg.org/#transformstream-set-up
+class TransformerAlgorithmsWrapper : public TransformerAlgorithmsBase {
+  MOZ_CAN_RUN_SCRIPT already_AddRefed<Promise> TransformCallback(
+      JSContext*, JS::Handle<JS::Value> aChunk,
+      TransformStreamDefaultController& aController, ErrorResult& aRv) final;
+
+  MOZ_CAN_RUN_SCRIPT already_AddRefed<Promise> FlushCallback(
+      JSContext*, TransformStreamDefaultController& aController,
+      ErrorResult& aRv) final;
+
+  MOZ_CAN_RUN_SCRIPT virtual void TransformCallbackImpl(
+      JS::Handle<JS::Value> aChunk,
+      TransformStreamDefaultController& aController, ErrorResult& aRv) = 0;
+
+  MOZ_CAN_RUN_SCRIPT virtual void FlushCallbackImpl(
+      TransformStreamDefaultController& aController, ErrorResult& aRv) {
+    // flushAlgorithm is optional, do nothing by default
+  }
+};
+
+}  // namespace mozilla::dom
+
+#endif  // DOM_STREAMS_TRANSFORMERCALLBACKHELPERS_H_