1 files changed, 49 insertions, 0 deletions
diff --git a/layout/forms/nsSelectsAreaFrame.h b/layout/forms/nsSelectsAreaFrame.h
new file mode 100644
index 000000000..3aac8a837
--- /dev/null
+++ b/layout/forms/nsSelectsAreaFrame.h
@@ -0,0 +1,49 @@
+/* -*- Mode: C++; tab-width: 2; 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 nsSelectsAreaFrame_h___
+#define nsSelectsAreaFrame_h___
+
+#include "mozilla/Attributes.h"
+#include "nsBlockFrame.h"
+
+class nsSelectsAreaFrame : public nsBlockFrame
+{
+public:
+  NS_DECL_FRAMEARENA_HELPERS
+
+  friend nsContainerFrame* NS_NewSelectsAreaFrame(nsIPresShell* aShell,
+                                                  nsStyleContext* aContext,
+                                                  nsFrameState aFlags);
+
+  virtual void BuildDisplayList(nsDisplayListBuilder*   aBuilder,
+                                const nsRect&           aDirtyRect,
+                                const nsDisplayListSet& aLists) override;
+
+  void BuildDisplayListInternal(nsDisplayListBuilder*   aBuilder,
+                                const nsRect&           aDirtyRect,
+                                const nsDisplayListSet& aLists);
+
+  virtual void Reflow(nsPresContext*           aCX,
+                      ReflowOutput&     aDesiredSize,
+                      const ReflowInput& aReflowInput,
+                      nsReflowStatus&          aStatus) override;
+
+  nscoord BSizeOfARow() const { return mBSizeOfARow; }
+  
+protected:
+  explicit nsSelectsAreaFrame(nsStyleContext* aContext) :
+    nsBlockFrame(aContext),
+    mBSizeOfARow(0)
+  {}
+
+  // 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___ */