gecko-dev/layout/forms/nsSelectsAreaFrame.h

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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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* The Original Code is mozilla.org code.
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* The Initial Developer of the Original Code is
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#ifndef nsSelectsAreaFrame_h___
#define nsSelectsAreaFrame_h___
#include "nsAreaFrame.h"
class nsIContent;
/**
* The area frame has an additional named child list:
* - "Absolute-list" which contains the absolutely positioned frames
*
* @see nsGkAtoms::absoluteList
*/
class nsSelectsAreaFrame : public nsAreaFrame
{
public:
friend nsIFrame* NS_NewSelectsAreaFrame(nsIPresShell* aShell, nsStyleContext* aContext, PRUint32 aFlags);
NS_IMETHOD BuildDisplayList(nsDisplayListBuilder* aBuilder,
const nsRect& aDirtyRect,
const nsDisplayListSet& aLists);
nsresult BuildDisplayListInternal(nsDisplayListBuilder* aBuilder,
const nsRect& aDirtyRect,
const nsDisplayListSet& aLists);
NS_IMETHOD Reflow(nsPresContext* aCX,
nsHTMLReflowMetrics& aDesiredSize,
const nsHTMLReflowState& aReflowState,
nsReflowStatus& aStatus);
static PRBool IsOptionElement(nsIContent* aContent);
static PRBool IsOptionElementFrame(nsIFrame *aFrame);
nscoord HeightOfARow() const { return mHeightOfARow; }
protected:
nsSelectsAreaFrame(nsStyleContext* aContext) :
nsAreaFrame(aContext),
mHeightOfARow(0)
{}
// We cache the height 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 heights of our options will change.
nscoord mHeightOfARow;
};
#endif /* nsSelectsAreaFrame_h___ */