/* 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 "nsMathMLChar.h"
#include "nsMathMLTokenFrame.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);

  MathMLFrameType 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;

  void 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,
                            AttrModType aModType) override;

  // This method is called by the parent frame to ask <mo>
  // to stretch itself.
  NS_IMETHOD
  Stretch(DrawTarget* aDrawTarget, StretchDirection aStretchDirection,
          nsBoundingMetrics& aContainerSize,
          ReflowOutput& aDesiredStretchSize) override;

  nsresult ChildListChanged() override {
    ProcessTextData();
    return nsMathMLContainerFrame::ChildListChanged();
  }

  nscoord ItalicCorrection() final;

 protected:
  explicit nsMathMLmoFrame(ComputedStyle* aStyle, nsPresContext* aPresContext)
      : nsMathMLTokenFrame(aStyle, aPresContext, kClassID),
        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);

  nscoord FixInterFrameSpacing(ReflowOutput& aDesiredSize) final;
};

#endif /* nsMathMLmoFrame_h_ */