Quelle nsMathMLmpaddedFrame.h Sprache: C

/* -*- 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 nsMathMLmpaddedFrame_h___
#define nsMathMLmpaddedFrame_h___

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

namespace mozilla {
class PresShell;
}  // namespace mozilla

//
// <mpadded> -- adjust space around content
//

class nsMathMLmpaddedFrame final : public nsMathMLContainerFrame {
public:
  NS_DECL_FRAMEARENA_HELPERS(nsMathMLmpaddedFrame)

  friend nsIFrame* NS_NewMathMLmpaddedFrame(mozilla::PresShell* aPresShell,
                                            ComputedStyle* aStyle);

  NS_IMETHOD
  InheritAutomaticData(nsIFrame* aParent) override;

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

  nsresult Place(DrawTarget* aDrawTarget, const PlaceFlags& aFlags,
                 ReflowOutput& aDesiredSize) override;

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

protected:
  explicit nsMathMLmpaddedFrame(ComputedStyle* aStyle,
                                nsPresContext* aPresContext)
      : nsMathMLContainerFrame(aStyle, aPresContext, kClassID) {}

  virtual ~nsMathMLmpaddedFrame();

private:
  struct Attribute {
    enum class Sign : uint8_t {
      Unspecified,
      Minus,
      Plus,
    };
    enum class PseudoUnit : uint8_t {
      Unspecified,
      ItSelf,
      Width,
      Height,
      Depth,
      NamedSpace,
    };
    nsCSSValue mValue;
    Sign mSign = Sign::Unspecified;
    PseudoUnit mPseudoUnit = PseudoUnit::Unspecified;
    enum class ParsingState : uint8_t {
      Valid,
      Invalid,
      Dirty,
    };
    ParsingState mState = ParsingState::Dirty;
    void Reset() {
      mValue.Reset();
      mSign = Sign::Unspecified;
      mPseudoUnit = PseudoUnit::Unspecified;
      mState = ParsingState::Dirty;
    }
    bool IsValid() const { return mState == ParsingState::Valid; }
  };

  Attribute mWidth;
  Attribute mHeight;
  Attribute mDepth;
  Attribute mLeadingSpace;
  Attribute mVerticalOffset;

  nsresult AttributeChanged(int32_t aNameSpaceID, nsAtom* aAttribute,
                            int32_t aModType) final;
  void ParseAttribute(nsAtom* aAtom, Attribute& aAttribute);
  bool ParseAttribute(nsString& aString, Attribute& aAttribute);

  void UpdateValue(const Attribute& aAttribute, Attribute::PseudoUnit aSelfUnit,
                   const ReflowOutput& aDesiredSize, nscoord& aValueToUpdate,
                   float aFontSizeInflation) const;
};

#endif /* nsMathMLmpaddedFrame_h___ */

quality100%

¤ Dauer der Verarbeitung: 0.13 Sekunden (vorverarbeitet) ¤

Wurzel

Suchen

Beweissystem der NASA

Beweissystem Isabelle

NIST Cobol Testsuite

Cephes Mathematical Library

Wiener Entwicklungsmethode

Haftungshinweis

Die Informationen auf dieser Webseite wurden nach bestem Wissen sorgfältig zusammengestellt. Es wird jedoch weder Vollständigkeit, noch Richtigkeit, noch Qualität der bereit gestellten Informationen zugesichert.

Bemerkung:

Die farbliche Syntaxdarstellung ist noch experimentell.