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-rw-r--r--dom/worklet/WorkletFetchHandler.h120
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diff --git a/dom/worklet/WorkletFetchHandler.h b/dom/worklet/WorkletFetchHandler.h
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+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+/* 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_WorkletFetchHandler_h
+#define mozilla_dom_WorkletFetchHandler_h
+
+#include "mozilla/dom/PromiseNativeHandler.h"
+#include "mozilla/dom/RequestBinding.h" // RequestCredentials
+#include "nsIStreamLoader.h"
+
+namespace mozilla::dom {
+class Worklet;
+struct WorkletOptions;
+class WorkletScriptHandler;
+
+namespace loader {
+class AddModuleThrowErrorRunnable;
+} // namespace loader
+
+// WorkletFetchHandler is used to fetch the module scripts on the main thread,
+// and notifies the result of addModule back to |aWorklet|.
+class WorkletFetchHandler final : public nsISupports {
+ public:
+ NS_DECL_CYCLE_COLLECTING_ISUPPORTS
+ NS_DECL_CYCLE_COLLECTION_SCRIPT_HOLDER_CLASS(WorkletFetchHandler)
+
+ static already_AddRefed<Promise> AddModule(Worklet* aWorklet, JSContext* aCx,
+ const nsAString& aModuleURL,
+ const WorkletOptions& aOptions,
+ ErrorResult& aRv);
+
+ // Load a module script on main thread.
+ nsresult StartFetch(JSContext* aCx, nsIURI* aURI, nsIURI* aReferrer);
+
+ void ExecutionFailed();
+ void ExecutionFailed(JS::Handle<JS::Value> aError);
+
+ void ExecutionSucceeded();
+
+ void HandleFetchFailed(nsIURI* aURI);
+
+ private:
+ WorkletFetchHandler(Worklet* aWorklet, Promise* aPromise,
+ RequestCredentials aCredentials);
+
+ ~WorkletFetchHandler();
+
+ void AddPromise(JSContext* aCx, Promise* aPromise);
+
+ void RejectPromises(nsresult aResult);
+ void RejectPromises(JS::Handle<JS::Value> aValue);
+
+ void ResolvePromises();
+
+ friend class StartFetchRunnable;
+ friend class loader::AddModuleThrowErrorRunnable;
+ RefPtr<Worklet> mWorklet;
+ nsTArray<RefPtr<Promise>> mPromises;
+
+ enum { ePending, eRejected, eResolved } mStatus;
+
+ RequestCredentials mCredentials;
+
+ bool mHasError = false;
+ JS::Heap<JS::Value> mErrorToRethrow;
+};
+
+// A Runnable to call WorkletFetchHandler::StartFetch on the main thread.
+class StartFetchRunnable final : public Runnable {
+ public:
+ StartFetchRunnable(
+ const nsMainThreadPtrHandle<WorkletFetchHandler>& aHandlerRef,
+ nsIURI* aURI, nsIURI* aReferrer);
+ ~StartFetchRunnable() = default;
+
+ NS_IMETHOD
+ Run() override;
+
+ private:
+ nsMainThreadPtrHandle<WorkletFetchHandler> mHandlerRef;
+ nsCOMPtr<nsIURI> mURI;
+ nsCOMPtr<nsIURI> mReferrer;
+};
+
+// WorkletScriptHandler is used to handle the result of fetching the module
+// script.
+class WorkletScriptHandler final : public PromiseNativeHandler,
+ public nsIStreamLoaderObserver {
+ public:
+ NS_DECL_THREADSAFE_ISUPPORTS
+
+ WorkletScriptHandler(Worklet* aWorklet, nsIURI* aURI);
+
+ void ResolvedCallback(JSContext* aCx, JS::Handle<JS::Value> aValue,
+ ErrorResult& aRv) override;
+
+ NS_IMETHOD
+ OnStreamComplete(nsIStreamLoader* aLoader, nsISupports* aContext,
+ nsresult aStatus, uint32_t aStringLen,
+ const uint8_t* aString) override;
+
+ void RejectedCallback(JSContext* aCx, JS::Handle<JS::Value> aValue,
+ ErrorResult& aRv) override;
+
+ void HandleFailure(nsresult aResult);
+
+ private:
+ ~WorkletScriptHandler() = default;
+
+ void DispatchFetchCompleteToWorklet(nsresult aRv);
+
+ RefPtr<Worklet> mWorklet;
+ nsCOMPtr<nsIURI> mURI;
+};
+
+} // namespace mozilla::dom
+#endif // mozilla_dom_WorkletFetchHandler_h