1 files changed, 50 insertions, 0 deletions
diff --git a/gfx/layers/apz/util/InputAPZContext.h b/gfx/layers/apz/util/InputAPZContext.h
new file mode 100644
index 000000000..0f232e1cb
--- /dev/null
+++ b/gfx/layers/apz/util/InputAPZContext.h
@@ -0,0 +1,50 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* 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_layers_InputAPZContext_h
+#define mozilla_layers_InputAPZContext_h
+
+#include "FrameMetrics.h"
+#include "mozilla/EventForwards.h"
+
+namespace mozilla {
+namespace layers {
+
+// InputAPZContext is used to communicate the ScrollableLayerGuid,
+// input block ID, APZ response from nsIWidget to RenderFrameParent.
+// It is conceptually attached to any WidgetInputEvent
+// that has been processed by APZ directly from a widget.
+class MOZ_STACK_CLASS InputAPZContext
+{
+private:
+  static ScrollableLayerGuid sGuid;
+  static uint64_t sBlockId;
+  static nsEventStatus sApzResponse;
+  static bool sRoutedToChildProcess;
+
+public:
+  static ScrollableLayerGuid GetTargetLayerGuid();
+  static uint64_t GetInputBlockId();
+  static nsEventStatus GetApzResponse();
+  static void SetRoutedToChildProcess();
+
+  InputAPZContext(const ScrollableLayerGuid& aGuid,
+                  const uint64_t& aBlockId,
+                  const nsEventStatus& aApzResponse);
+  ~InputAPZContext();
+
+  bool WasRoutedToChildProcess();
+
+private:
+  ScrollableLayerGuid mOldGuid;
+  uint64_t mOldBlockId;
+  nsEventStatus mOldApzResponse;
+  bool mOldRoutedToChildProcess;
+};
+
+} // namespace layers
+} // namespace mozilla
+
+#endif /* mozilla_layers_InputAPZContext_h */