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-rw-r--r--layout/forms/nsSelectsAreaFrame.h52
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diff --git a/layout/forms/nsSelectsAreaFrame.h b/layout/forms/nsSelectsAreaFrame.h
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+/* -*- 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/. */
+#ifndef nsSelectsAreaFrame_h___
+#define nsSelectsAreaFrame_h___
+
+#include "mozilla/Attributes.h"
+#include "nsBlockFrame.h"
+
+namespace mozilla {
+class PresShell;
+} // namespace mozilla
+
+class nsSelectsAreaFrame final : public nsBlockFrame {
+ public:
+ NS_DECL_FRAMEARENA_HELPERS(nsSelectsAreaFrame)
+
+ friend nsContainerFrame* NS_NewSelectsAreaFrame(mozilla::PresShell* aShell,
+ ComputedStyle* aStyle,
+ nsFrameState aFlags);
+
+ virtual void BuildDisplayList(nsDisplayListBuilder* aBuilder,
+ const nsDisplayListSet& aLists) override;
+
+ void BuildDisplayListInternal(nsDisplayListBuilder* aBuilder,
+ const nsDisplayListSet& aLists);
+
+ virtual void Reflow(nsPresContext* aCX, ReflowOutput& aDesiredSize,
+ const ReflowInput& aReflowInput,
+ nsReflowStatus& aStatus) override;
+
+ nscoord BSizeOfARow() const { return mBSizeOfARow; }
+
+ protected:
+ explicit nsSelectsAreaFrame(ComputedStyle* aStyle,
+ nsPresContext* aPresContext)
+ : nsBlockFrame(aStyle, aPresContext, kClassID),
+ // initialize to wacky value so first call of
+ // nsSelectsAreaFrame::Reflow will always invalidate
+ mBSizeOfARow(nscoord_MIN) {}
+
+ // We cache the block size of a single row so that changes to the
+ // "size" attribute, padding, etc. can all be handled with only one
+ // reflow. We'll have to reflow twice if someone changes our font
+ // size or something like that, so that the block size of our options
+ // will change.
+ nscoord mBSizeOfARow;
+};
+
+#endif /* nsSelectsAreaFrame_h___ */