1 files changed, 56 insertions, 0 deletions
diff --git a/dom/workers/EventWithOptionsRunnable.h b/dom/workers/EventWithOptionsRunnable.h
new file mode 100644
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+++ b/dom/workers/EventWithOptionsRunnable.h
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+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=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 https://mozilla.org/MPL/2.0/. */
+
+#ifndef MOZILLA_DOM_WORKERS_EVENTWITHOPTIONSRUNNABLE_H_
+#define MOZILLA_DOM_WORKERS_EVENTWITHOPTIONSRUNNABLE_H_
+
+#include "WorkerCommon.h"
+#include "WorkerRunnable.h"
+#include "mozilla/dom/StructuredCloneHolder.h"
+
+namespace mozilla {
+class DOMEventTargetHelper;
+
+namespace dom {
+class Event;
+class EventTarget;
+class Worker;
+class WorkerPrivate;
+
+// Cargo-culted from MesssageEventRunnable.
+// Intended to be used for the idiom where arbitrary options are transferred to
+// the worker thread (with optional transfer functions), which are then used to
+// build an event, which is then fired on the global worker scope.
+class EventWithOptionsRunnable : public WorkerDebuggeeRunnable,
+                                 public StructuredCloneHolder {
+ public:
+  explicit EventWithOptionsRunnable(
+      Worker& aWorker, const char* aName = "EventWithOptionsRunnable");
+  void InitOptions(JSContext* aCx, JS::Handle<JS::Value> aOptions,
+                   const Sequence<JSObject*>& aTransferable, ErrorResult& aRv);
+
+  // Called on the worker thread. The event returned will be fired on the
+  // worker's global scope. If a StrongWorkerRef needs to be retained, the
+  // implementation can do so with the WorkerPrivate.
+  virtual already_AddRefed<Event> BuildEvent(
+      JSContext* aCx, nsIGlobalObject* aGlobal, EventTarget* aTarget,
+      JS::Handle<JS::Value> aOptions) = 0;
+
+  // Called on the worker thread
+  virtual void OptionsDeserializeFailed(ErrorResult& aRv) {}
+
+ protected:
+  virtual ~EventWithOptionsRunnable();
+
+ private:
+  bool WorkerRun(JSContext* aCx, WorkerPrivate* aWorkerPrivate) override;
+  bool BuildAndFireEvent(JSContext* aCx, WorkerPrivate* aWorkerPrivate,
+                         DOMEventTargetHelper* aTarget);
+};
+}  // namespace dom
+}  // namespace mozilla
+
+#endif  // MOZILLA_DOM_WORKERS_EVENTWITHOPTIONSRUNNABLE_H_