nsMathMLmoFrame.h - mozsearch

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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 nsMathMLmoFrame_h___

#define nsMathMLmoFrame_h___

#include "mozilla/Attributes.h"

#include "nsMathMLTokenFrame.h"

#include "nsMathMLChar.h"

namespace mozilla {

class PresShell;

}  // namespace mozilla

//

// <mo> -- operator, fence, or separator

//

class nsMathMLmoFrame final : public nsMathMLTokenFrame {

 public:

  NS_DECL_FRAMEARENA_HELPERS(nsMathMLmoFrame)

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

                                       ComputedStyle* aStyle);

  eMathMLFrameType GetMathMLFrameType() override;

  void DidSetComputedStyle(ComputedStyle* aOldStyle) override;

  void BuildDisplayList(nsDisplayListBuilder* aBuilder,

                        const nsDisplayListSet& aLists) override;

  NS_IMETHOD

  InheritAutomaticData(nsIFrame* aParent) override;

  NS_IMETHOD

  TransmitAutomaticData() override;

  void SetInitialChildList(ChildListID aListID,

                           nsFrameList&& aChildList) override;

  void Reflow(nsPresContext* aPresContext, ReflowOutput& aDesiredSize,

              const ReflowInput& aReflowInput,

              nsReflowStatus& aStatus) override;

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

                 ReflowOutput& aDesiredSize) override;

  void MarkIntrinsicISizesDirty() override;

  void GetIntrinsicISizeMetrics(gfxContext* aRenderingContext,

                                ReflowOutput& aDesiredSize) override;

  nsresult AttributeChanged(int32_t aNameSpaceID, nsAtom* aAttribute,

                            int32_t aModType) override;

  // This method is called by the parent frame to ask <mo>

  // to stretch itself.

  NS_IMETHOD

  Stretch(DrawTarget* aDrawTarget, nsStretchDirection aStretchDirection,

          nsBoundingMetrics& aContainerSize,

          ReflowOutput& aDesiredStretchSize) override;

  nsresult ChildListChanged(int32_t aModType) override {

    ProcessTextData();

    return nsMathMLContainerFrame::ChildListChanged(aModType);

 protected:

  explicit nsMathMLmoFrame(ComputedStyle* aStyle, nsPresContext* aPresContext)

      : nsMathMLTokenFrame(aStyle, aPresContext, kClassID),

        mFlags(0),

        mMinSize(0),

        mMaxSize(0) {}

  virtual ~nsMathMLmoFrame();

  nsMathMLChar

      mMathMLChar;  // Here is the MathMLChar that will deal with the operator.

  nsOperatorFlags mFlags;

  float mMinSize;

  float mMaxSize;

  bool UseMathMLChar();

  // overload the base method so that we can setup our nsMathMLChar

  void ProcessTextData();

  // helper to get our 'form' and lookup in the Operator Dictionary to fetch

  // our default data that may come from there, and to complete the setup

  // using attributes that we may have

  void ProcessOperatorData();

  // helper to double check thar our char should be rendered as a selected char

  bool IsFrameInSelection(nsIFrame* aFrame);

};

#endif /* nsMathMLmoFrame_h___ */