1 files changed, 37 insertions, 0 deletions
diff --git a/layout/xul/SimpleXULLeafFrame.cpp b/layout/xul/SimpleXULLeafFrame.cpp
new file mode 100644
index 0000000000..96b3d81762
--- /dev/null
+++ b/layout/xul/SimpleXULLeafFrame.cpp
@@ -0,0 +1,37 @@
+
+/* -*- 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/. */
+
+#include "SimpleXULLeafFrame.h"
+#include "mozilla/PresShell.h"
+
+nsIFrame* NS_NewSimpleXULLeafFrame(mozilla::PresShell* aPresShell,
+                                   mozilla::ComputedStyle* aStyle) {
+  return new (aPresShell)
+      mozilla::SimpleXULLeafFrame(aStyle, aPresShell->GetPresContext());
+}
+
+namespace mozilla {
+
+NS_IMPL_FRAMEARENA_HELPERS(SimpleXULLeafFrame)
+
+void SimpleXULLeafFrame::Reflow(nsPresContext* aPresContext,
+                                ReflowOutput& aDesiredSize,
+                                const ReflowInput& aReflowInput,
+                                nsReflowStatus& aStatus) {
+  MarkInReflow();
+  MOZ_ASSERT(aStatus.IsEmpty(), "Caller should pass a fresh reflow status!");
+  const auto wm = GetWritingMode();
+  const auto& bp = aReflowInput.ComputedLogicalBorderPadding(wm);
+  aDesiredSize.ISize(wm) = bp.IStartEnd(wm) + aReflowInput.ComputedISize();
+  aDesiredSize.BSize(wm) =
+      bp.BStartEnd(wm) + (aReflowInput.ComputedBSize() == NS_UNCONSTRAINEDSIZE
+                              ? aReflowInput.ComputedMinBSize()
+                              : aReflowInput.ComputedBSize());
+  aDesiredSize.SetOverflowAreasToDesiredBounds();
+}
+
+}  // namespace mozilla