1 files changed, 78 insertions, 0 deletions
diff --git a/dom/system/windows/location/WindowsLocationProvider.h b/dom/system/windows/location/WindowsLocationProvider.h
new file mode 100644
index 0000000000..d1e4dfa936
--- /dev/null
+++ b/dom/system/windows/location/WindowsLocationProvider.h
@@ -0,0 +1,78 @@
+/* -*- 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_WindowsLocationProvider_h__
+#define mozilla_dom_WindowsLocationProvider_h__
+
+#include "nsCOMPtr.h"
+#include "nsIGeolocationProvider.h"
+#include "mozilla/MozPromise.h"
+
+class MLSFallback;
+
+namespace mozilla::dom {
+
+class WindowsLocationParent;
+
+// Uses a PWindowsLocation actor to subscribe to geolocation updates from the
+// Windows utility process and falls back to MLS when it is not available or
+// fails.
+class WindowsLocationProvider final : public nsIGeolocationProvider {
+ public:
+  NS_DECL_ISUPPORTS
+  NS_DECL_NSIGEOLOCATIONPROVIDER
+
+  WindowsLocationProvider();
+
+ private:
+  friend WindowsLocationParent;
+
+  ~WindowsLocationProvider();
+
+  nsresult CreateAndWatchMLSProvider(nsIGeolocationUpdate* aCallback);
+  void CancelMLSProvider();
+
+  void MaybeCreateLocationActor();
+  void ReleaseUtilityProcess();
+
+  // These methods either send the message on the existing actor or queue
+  // the messages to be sent (in order) once the actor exists.
+  bool SendStartup();
+  bool SendRegisterForReport(nsIGeolocationUpdate* aCallback);
+  bool SendUnregisterForReport();
+  bool SendSetHighAccuracy(bool aEnable);
+  bool Send__delete__();
+
+  void RecvUpdate(RefPtr<nsIDOMGeoPosition> aGeoPosition);
+  // See bug 1539864 for MOZ_CAN_RUN_SCRIPT_BOUNDARY justification.
+  MOZ_CAN_RUN_SCRIPT_BOUNDARY void RecvFailed(uint16_t err);
+
+  // The utility process actor has ended its connection, either successfully
+  // or with an error.
+  void ActorStopped();
+
+  // Run fn once actor is ready to send messages, which may be immediately.
+  template <typename Fn>
+  bool WhenActorIsReady(Fn&& fn);
+
+  RefPtr<MLSFallback> mMLSProvider;
+
+  nsCOMPtr<nsIGeolocationUpdate> mCallback;
+
+  using WindowsLocationPromise =
+      MozPromise<RefPtr<WindowsLocationParent>, bool, false>;
+
+  // Before the utility process exists, we have a promise that we will get our
+  // location actor.  mActor and mActorPromise are never both set.
+  RefPtr<WindowsLocationPromise> mActorPromise;
+  RefPtr<WindowsLocationParent> mActor;
+
+  bool mWatching = false;
+};
+
+}  // namespace mozilla::dom
+
+#endif  // mozilla_dom_WindowsLocationProvider_h__