1 files changed, 31 insertions, 0 deletions
diff --git a/widget/android/GeckoSystemStateListener.h b/widget/android/GeckoSystemStateListener.h
new file mode 100644
index 0000000000..75cb1cd9fe
--- /dev/null
+++ b/widget/android/GeckoSystemStateListener.h
@@ -0,0 +1,31 @@
+/* -*- Mode: c++; c-basic-offset: 2; tab-width: 20; indent-tabs-mode: nil; -*-
+ * 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 GeckoSystemStateListener_h
+#define GeckoSystemStateListener_h
+
+#include "mozilla/Assertions.h"
+#include "mozilla/LookAndFeel.h"
+#include "mozilla/java/GeckoSystemStateListenerNatives.h"
+
+namespace mozilla {
+
+class GeckoSystemStateListener final
+    : public java::GeckoSystemStateListener::Natives<GeckoSystemStateListener> {
+  GeckoSystemStateListener() = delete;
+
+ public:
+  static void OnDeviceChanged() {
+    MOZ_ASSERT(NS_IsMainThread());
+    // TODO(emilio, bug 1673318): This could become more granular and avoid work
+    // if we get whether these are layout/style-affecting from the caller.
+    mozilla::LookAndFeel::NotifyChangedAllWindows(
+        widget::ThemeChangeKind::StyleAndLayout);
+  }
+};
+
+}  // namespace mozilla
+
+#endif  // GeckoSystemStateListener_h