nsMathMLmspaceFrame.h

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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */

/* vim: set ts=8 sts=2 et sw=2 tw=80: */

/* 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 nsMathMLmspaceFrame_h___

#define nsMathMLmspaceFrame_h___

#include "mozilla/Attributes.h"

#include "nsCSSValue.h"

#include "nsMathMLContainerFrame.h"

namespace mozilla {

class PresShell;

}  // namespace mozilla

//

// <mspace> -- space

//

class nsMathMLmspaceFrame final : public nsMathMLContainerFrame {

 public:

  NS_DECL_FRAMEARENA_HELPERS(nsMathMLmspaceFrame)

  friend nsIFrame* NS_NewMathMLmspaceFrame(mozilla::PresShell* aPresShell,

                                           ComputedStyle* aStyle);

  NS_IMETHOD

  TransmitAutomaticData() override {

    // The REC defines the following elements to be space-like:

    // * an mtext, mspace, maligngroup, or malignmark element;

    mPresentationData.flags |= NS_MATHML_SPACE_LIKE;

    return NS_OK;

 protected:

  explicit nsMathMLmspaceFrame(ComputedStyle* aStyle,

                               nsPresContext* aPresContext)

      : nsMathMLContainerFrame(aStyle, aPresContext, kClassID) {}

  virtual ~nsMathMLmspaceFrame();

 private:

  struct Attribute {

    nsCSSValue mValue;

    enum class ParsingState : uint8_t {

      Valid,

      Invalid,

      Dirty,

};

    ParsingState mState = ParsingState::Dirty;

};

  Attribute mWidth;

  Attribute mHeight;

  Attribute mDepth;

  nsresult AttributeChanged(int32_t aNameSpaceID, nsAtom* aAttribute,

                            int32_t aModType) final;

  nscoord CalculateAttributeValue(nsAtom* aAtom, Attribute& aAttribute,

                                  uint32_t aFlags, float aFontSizeInflation);

  nsresult Place(DrawTarget* aDrawTarget, const PlaceFlags& aFlags,

                 ReflowOutput& aDesiredSize) final;

};

#endif /* nsMathMLmspaceFrame_h___ */