1 files changed, 40 insertions, 0 deletions
diff --git a/dom/workers/WorkerDocumentListener.h b/dom/workers/WorkerDocumentListener.h
new file mode 100644
index 0000000000..4bb46cadf2
--- /dev/null
+++ b/dom/workers/WorkerDocumentListener.h
@@ -0,0 +1,40 @@
+/* -*- 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_WorkerDocumentListener_h__
+#define mozilla_dom_WorkerDocumentListener_h__
+
+#include "mozilla/Mutex.h"
+#include "mozilla/RefPtr.h"
+#include "nsISupportsImpl.h"
+
+namespace mozilla::dom {
+class ThreadSafeWorkerRef;
+class WorkerPrivate;
+class WeakWorkerRef;
+
+class WorkerDocumentListener final {
+  NS_INLINE_DECL_THREADSAFE_REFCOUNTING(WorkerDocumentListener)
+
+ public:
+  WorkerDocumentListener();
+
+  void OnVisible(bool aVisible);
+  void SetListening(uint64_t aWindowID, bool aListen);
+  void Destroy();
+
+  static RefPtr<WorkerDocumentListener> Create(WorkerPrivate* aWorkerPrivate);
+
+ private:
+  ~WorkerDocumentListener();
+
+  Mutex mMutex MOZ_UNANNOTATED;  // protects mWorkerRef
+  RefPtr<ThreadSafeWorkerRef> mWorkerRef;
+};
+
+}  // namespace mozilla::dom
+
+#endif /* mozilla_dom_WorkerDocumentListener_h__ */