1 files changed, 65 insertions, 0 deletions
diff --git a/gfx/layers/apz/src/AsyncDragMetrics.h b/gfx/layers/apz/src/AsyncDragMetrics.h
new file mode 100644
index 000000000..54b60f823
--- /dev/null
+++ b/gfx/layers/apz/src/AsyncDragMetrics.h
@@ -0,0 +1,65 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set sw=2 ts=8 et 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_layers_DragMetrics_h
+#define mozilla_layers_DragMetrics_h
+
+#include "FrameMetrics.h"
+
+namespace IPC {
+template <typename T> struct ParamTraits;
+} // namespace IPC
+
+namespace mozilla {
+
+namespace layers {
+
+class AsyncDragMetrics {
+  friend struct IPC::ParamTraits<mozilla::layers::AsyncDragMetrics>;
+
+public:
+  enum DragDirection {
+    NONE,
+    VERTICAL,
+    HORIZONTAL,
+    SENTINEL,
+  };
+
+  // IPC constructor
+  AsyncDragMetrics()
+    : mViewId(0)
+    , mPresShellId(0)
+    , mDragStartSequenceNumber(0)
+    , mScrollbarDragOffset(0)
+    , mDirection(NONE)
+  {}
+
+  AsyncDragMetrics(const FrameMetrics::ViewID& aViewId,
+                   uint32_t aPresShellId,
+                   uint64_t aDragStartSequenceNumber,
+                   CSSIntCoord aScrollbarDragOffset,
+                   const CSSIntRect& aScrollTrack,
+                   DragDirection aDirection)
+    : mViewId(aViewId)
+    , mPresShellId(aPresShellId)
+    , mDragStartSequenceNumber(aDragStartSequenceNumber)
+    , mScrollbarDragOffset(aScrollbarDragOffset)
+    , mScrollTrack(aScrollTrack)
+    , mDirection(aDirection)
+  {}
+
+  FrameMetrics::ViewID mViewId;
+  uint32_t mPresShellId;
+  uint64_t mDragStartSequenceNumber;
+  CSSIntCoord mScrollbarDragOffset;
+  CSSIntRect mScrollTrack;
+  DragDirection mDirection;
+};
+
+}
+}
+
+#endif