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31 lines
1.0 KiB
C++
31 lines
1.0 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#ifndef nsIPercentHeightObserver_h___
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#define nsIPercentHeightObserver_h___
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#include "nsQueryFrame.h"
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struct nsHTMLReflowState;
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/**
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* This interface is supported by frames that need to provide computed height
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* values to children during reflow which would otherwise not happen. Currently only
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* table cells support this.
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*/
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class nsIPercentHeightObserver
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{
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public:
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NS_DECL_QUERYFRAME_TARGET(nsIPercentHeightObserver)
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// Notify the observer that aReflowState has no computed height, but it has a percent height
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virtual void NotifyPercentHeight(const nsHTMLReflowState& aReflowState) = 0;
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// Ask the observer if it should observe aReflowState.frame
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virtual bool NeedsToObserve(const nsHTMLReflowState& aReflowState) = 0;
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};
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#endif // nsIPercentHeightObserver_h___
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