The Tor Browser: layout/base/nsIPercentHeightObserver.h@b8a032363ba2

Incorporate requested changes from Mozilla in review:
https://bugzilla.mozilla.org/show_bug.cgi?id=1123480#c6

     1 /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */

     2 /* This Source Code Form is subject to the terms of the Mozilla Public

     3  * License, v. 2.0. If a copy of the MPL was not distributed with this

     4  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

     6 #ifndef nsIPercentHeightObserver_h___

     7 #define nsIPercentHeightObserver_h___

     9 #include "nsQueryFrame.h"

    11 struct nsHTMLReflowState;

    13 /**

    14  * This interface is supported by frames that need to provide computed height

    15  * values to children during reflow which would otherwise not happen. Currently only

    16  * table cells support this.

    17  */

    18 class nsIPercentHeightObserver

    19 {

    20 public:

    21   NS_DECL_QUERYFRAME_TARGET(nsIPercentHeightObserver)

    23   // Notify the observer that aReflowState has no computed height, but it has a percent height

    24   virtual void NotifyPercentHeight(const nsHTMLReflowState& aReflowState) = 0;

    26   // Ask the observer if it should observe aReflowState.frame

    27   virtual bool NeedsToObserve(const nsHTMLReflowState& aReflowState) = 0;

    28 };

    30 #endif // nsIPercentHeightObserver_h___

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