1 files changed, 40 insertions, 0 deletions
diff --git a/layout/generic/nsBackdropFrame.h b/layout/generic/nsBackdropFrame.h
new file mode 100644
index 0000000000..acc509e593
--- /dev/null
+++ b/layout/generic/nsBackdropFrame.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/. */
+
+/* rendering object for CSS "::backdrop" */
+
+#ifndef nsBackdropFrame_h___
+#define nsBackdropFrame_h___
+
+#include "nsIFrame.h"
+
+class nsBackdropFrame final : public nsIFrame {
+ public:
+  NS_DECL_FRAMEARENA_HELPERS(nsBackdropFrame)
+
+  explicit nsBackdropFrame(ComputedStyle* aStyle, nsPresContext* aPresContext)
+      : nsIFrame(aStyle, aPresContext, kClassID) {}
+
+#ifdef DEBUG_FRAME_DUMP
+  virtual nsresult GetFrameName(nsAString& aResult) const override;
+#endif
+  virtual ComputedStyle* GetParentComputedStyle(
+      nsIFrame** aProviderFrame) const override;
+  virtual void BuildDisplayList(nsDisplayListBuilder* aBuilder,
+                                const nsDisplayListSet& aLists) override;
+  mozilla::LogicalSize ComputeAutoSize(
+      gfxContext* aRenderingContext, mozilla::WritingMode aWM,
+      const mozilla::LogicalSize& aCBSize, nscoord aAvailableISize,
+      const mozilla::LogicalSize& aMargin,
+      const mozilla::LogicalSize& aBorderPadding,
+      const mozilla::StyleSizeOverrides& aSizeOverrides,
+      mozilla::ComputeSizeFlags aFlags) override;
+  virtual void Reflow(nsPresContext* aPresContext, ReflowOutput& aDesiredSize,
+                      const ReflowInput& aReflowInput,
+                      nsReflowStatus& aStatus) override;
+};
+
+#endif  // nsBackdropFrame_h___