1 files changed, 46 insertions, 0 deletions
diff --git a/layout/xul/SimpleXULLeafFrame.h b/layout/xul/SimpleXULLeafFrame.h
new file mode 100644
index 0000000000..468b1f3d2a
--- /dev/null
+++ b/layout/xul/SimpleXULLeafFrame.h
@@ -0,0 +1,46 @@
+/* -*- 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/. */
+
+// A simple frame class for XUL frames that are leafs on the tree but need
+// background / border painting, and for some reason or another need special
+// code (like event handling code) which we haven't ported to the DOM.
+//
+// This should generally not be used for new frame classes.
+
+#ifndef mozilla_SimpleXULLeafFrame_h
+#define mozilla_SimpleXULLeafFrame_h
+
+#include "nsLeafFrame.h"
+
+namespace mozilla {
+
+// Shared class for thumb and scrollbar buttons.
+class SimpleXULLeafFrame : public nsLeafFrame {
+ public:
+  NS_DECL_FRAMEARENA_HELPERS(SimpleXULLeafFrame)
+
+  // TODO: Look at appearance instead maybe?
+  nscoord GetIntrinsicISize() override { return 0; }
+  nscoord GetIntrinsicBSize() override { return 0; }
+
+  void Reflow(nsPresContext* aPresContext, ReflowOutput& aDesiredSize,
+              const ReflowInput& aReflowInput,
+              nsReflowStatus& aStatus) override;
+  explicit SimpleXULLeafFrame(ComputedStyle* aStyle,
+                              nsPresContext* aPresContext, ClassID aClassID)
+      : nsLeafFrame(aStyle, aPresContext, aClassID) {}
+
+  explicit SimpleXULLeafFrame(ComputedStyle* aStyle,
+                              nsPresContext* aPresContext)
+      : SimpleXULLeafFrame(aStyle, aPresContext, kClassID) {}
+
+  friend nsIFrame* NS_NewSimpleXULLeafFrame(mozilla::PresShell* aPresShell,
+                                            ComputedStyle* aStyle);
+};
+
+}  // namespace mozilla
+
+#endif