1 files changed, 55 insertions, 0 deletions
diff --git a/widget/ScrollbarDrawingWin.h b/widget/ScrollbarDrawingWin.h
new file mode 100644
index 0000000000..adc79035c2
--- /dev/null
+++ b/widget/ScrollbarDrawingWin.h
@@ -0,0 +1,55 @@
+/* -*- Mode: C++; tab-width: 40; 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_widget_ScrollbarDrawingWin_h
+#define mozilla_widget_ScrollbarDrawingWin_h
+
+#include "nsITheme.h"
+#include "nsNativeTheme.h"
+#include "ScrollbarDrawing.h"
+
+namespace mozilla::widget {
+
+class ScrollbarDrawingWin : public ScrollbarDrawing {
+ protected:
+  explicit ScrollbarDrawingWin(Kind aKind) : ScrollbarDrawing(aKind) {}
+
+ public:
+  ScrollbarDrawingWin() : ScrollbarDrawingWin(Kind::Win10) {}
+
+  virtual ~ScrollbarDrawingWin() = default;
+
+  LayoutDeviceIntSize GetMinimumWidgetSize(nsPresContext*,
+                                           StyleAppearance aAppearance,
+                                           nsIFrame* aFrame) override;
+
+  Maybe<nsITheme::Transparency> GetScrollbarPartTransparency(
+      nsIFrame* aFrame, StyleAppearance aAppearance) override;
+
+  template <typename PaintBackendData>
+  bool DoPaintScrollbarThumb(PaintBackendData&, const LayoutDeviceRect&,
+                             ScrollbarKind, nsIFrame*, const ComputedStyle&,
+                             const ElementState& aElementState,
+                             const DocumentState& aDocumentState, const Colors&,
+                             const DPIRatio&);
+  bool PaintScrollbarThumb(DrawTarget&, const LayoutDeviceRect&, ScrollbarKind,
+                           nsIFrame*, const ComputedStyle&,
+                           const ElementState& aElementState,
+                           const DocumentState& aDocumentState, const Colors&,
+                           const DPIRatio&) override;
+  bool PaintScrollbarThumb(WebRenderBackendData&, const LayoutDeviceRect&,
+                           ScrollbarKind, nsIFrame*, const ComputedStyle&,
+                           const ElementState& aElementState,
+                           const DocumentState& aDocumentState, const Colors&,
+                           const DPIRatio&) override;
+
+  void RecomputeScrollbarParams() override;
+};
+
+static constexpr uint32_t kDefaultWinScrollbarSize = 17;
+
+}  // namespace mozilla::widget
+
+#endif