layout/mathml/nsMathMLmphantomFrame.h
author JW Wang <jwwang@mozilla.com>
Tue, 10 Feb 2015 18:19:00 +0100
changeset 250209 acb510bddaddccafc7fc05550fd56a42053607f6
parent 224484 9d4e083655b993f73ba3eca84e0f14cdd270bcda
permissions -rw-r--r--
Bug 1130917 - Part 3 - fix EME gtests. r=edwin. a=lmandel

/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

#ifndef nsMathMLmphantomFrame_h___
#define nsMathMLmphantomFrame_h___

#include "mozilla/Attributes.h"
#include "nsMathMLContainerFrame.h"

//
// <mphantom> -- make content invisible but preserve its size
//

class nsMathMLmphantomFrame : public nsMathMLContainerFrame {
public:
  NS_DECL_FRAMEARENA_HELPERS

  friend nsIFrame* NS_NewMathMLmphantomFrame(nsIPresShell* aPresShell, nsStyleContext* aContext);

  NS_IMETHOD
  InheritAutomaticData(nsIFrame* aParent) MOZ_OVERRIDE;

  NS_IMETHOD
  TransmitAutomaticData() MOZ_OVERRIDE {
    return TransmitAutomaticDataForMrowLikeElement();
  }

  virtual void BuildDisplayList(nsDisplayListBuilder*   aBuilder,
                                const nsRect&           aDirtyRect,
                                const nsDisplayListSet& aLists) MOZ_OVERRIDE {}

  bool
  IsMrowLike() MOZ_OVERRIDE {
    return mFrames.FirstChild() != mFrames.LastChild() ||
           !mFrames.FirstChild();
  }

protected:
  explicit nsMathMLmphantomFrame(nsStyleContext* aContext)
    : nsMathMLContainerFrame(aContext) {}
  virtual ~nsMathMLmphantomFrame();
};

#endif /* nsMathMLmphantomFrame_h___ */