1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/layout/base/nsIPercentHeightObserver.h Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,30 @@
1.4 +/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
1.5 +/* This Source Code Form is subject to the terms of the Mozilla Public
1.6 + * License, v. 2.0. If a copy of the MPL was not distributed with this
1.7 + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
1.8 +
1.9 +#ifndef nsIPercentHeightObserver_h___
1.10 +#define nsIPercentHeightObserver_h___
1.11 +
1.12 +#include "nsQueryFrame.h"
1.13 +
1.14 +struct nsHTMLReflowState;
1.15 +
1.16 +/**
1.17 + * This interface is supported by frames that need to provide computed height
1.18 + * values to children during reflow which would otherwise not happen. Currently only
1.19 + * table cells support this.
1.20 + */
1.21 +class nsIPercentHeightObserver
1.22 +{
1.23 +public:
1.24 + NS_DECL_QUERYFRAME_TARGET(nsIPercentHeightObserver)
1.25 +
1.26 + // Notify the observer that aReflowState has no computed height, but it has a percent height
1.27 + virtual void NotifyPercentHeight(const nsHTMLReflowState& aReflowState) = 0;
1.28 +
1.29 + // Ask the observer if it should observe aReflowState.frame
1.30 + virtual bool NeedsToObserve(const nsHTMLReflowState& aReflowState) = 0;
1.31 +};
1.32 +
1.33 +#endif // nsIPercentHeightObserver_h___
