gecko-dev/layout/base/nsIPercentHeightObserver.h

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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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#ifndef nsIPercentHeightObserver_h___
#define nsIPercentHeightObserver_h___
#include "nsQueryFrame.h"
struct nsHTMLReflowState;
class nsPresContext;
/**
* This interface is supported by frames that need to provide computed height
* values to children during reflow which would otherwise not happen. Currently only
* table cells support this.
*/
class nsIPercentHeightObserver
{
public:
NS_DECLARE_FRAME_ACCESSOR(nsIPercentHeightObserver)
// Notify the observer that aReflowState has no computed height, but it has a percent height
virtual void NotifyPercentHeight(const nsHTMLReflowState& aReflowState) = 0;
// Ask the observer if it should observe aReflowState.frame
virtual PRBool NeedsToObserve(const nsHTMLReflowState& aReflowState) = 0;
};
#endif // nsIPercentHeightObserver_h___