tor-browser

The Tor Browser
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nsMathMLmoFrame.h (3164B)

      1 /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
      2 /* vim: set ts=8 sts=2 et sw=2 tw=80: */
      3 /* This Source Code Form is subject to the terms of the Mozilla Public
      4 * License, v. 2.0. If a copy of the MPL was not distributed with this
      5 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
      6 
      7 #ifndef nsMathMLmoFrame_h___
      8 #define nsMathMLmoFrame_h___
      9 
     10 #include "nsMathMLChar.h"
     11 #include "nsMathMLTokenFrame.h"
     12 
     13 namespace mozilla {
     14 class PresShell;
     15 }  // namespace mozilla
     16 
     17 //
     18 // <mo> -- operator, fence, or separator
     19 //
     20 
     21 class nsMathMLmoFrame final : public nsMathMLTokenFrame {
     22 public:
     23  NS_DECL_FRAMEARENA_HELPERS(nsMathMLmoFrame)
     24 
     25  friend nsIFrame* NS_NewMathMLmoFrame(mozilla::PresShell* aPresShell,
     26                                       ComputedStyle* aStyle);
     27 
     28  MathMLFrameType GetMathMLFrameType() override;
     29 
     30  void DidSetComputedStyle(ComputedStyle* aOldStyle) override;
     31 
     32  void BuildDisplayList(nsDisplayListBuilder* aBuilder,
     33                        const nsDisplayListSet& aLists) override;
     34 
     35  NS_IMETHOD
     36  InheritAutomaticData(nsIFrame* aParent) override;
     37 
     38  NS_IMETHOD
     39  TransmitAutomaticData() override;
     40 
     41  void SetInitialChildList(ChildListID aListID,
     42                           nsFrameList&& aChildList) override;
     43 
     44  void Reflow(nsPresContext* aPresContext, ReflowOutput& aDesiredSize,
     45              const ReflowInput& aReflowInput,
     46              nsReflowStatus& aStatus) override;
     47 
     48  void Place(DrawTarget* aDrawTarget, const PlaceFlags& aFlags,
     49             ReflowOutput& aDesiredSize) override;
     50 
     51  void MarkIntrinsicISizesDirty() override;
     52 
     53  void GetIntrinsicISizeMetrics(gfxContext* aRenderingContext,
     54                                ReflowOutput& aDesiredSize) override;
     55 
     56  nsresult AttributeChanged(int32_t aNameSpaceID, nsAtom* aAttribute,
     57                            AttrModType aModType) override;
     58 
     59  // This method is called by the parent frame to ask <mo>
     60  // to stretch itself.
     61  NS_IMETHOD
     62  Stretch(DrawTarget* aDrawTarget, nsStretchDirection aStretchDirection,
     63          nsBoundingMetrics& aContainerSize,
     64          ReflowOutput& aDesiredStretchSize) override;
     65 
     66  nsresult ChildListChanged() override {
     67    ProcessTextData();
     68    return nsMathMLContainerFrame::ChildListChanged();
     69  }
     70 
     71 protected:
     72  explicit nsMathMLmoFrame(ComputedStyle* aStyle, nsPresContext* aPresContext)
     73      : nsMathMLTokenFrame(aStyle, aPresContext, kClassID),
     74        mFlags(0),
     75        mMinSize(0),
     76        mMaxSize(0) {}
     77  virtual ~nsMathMLmoFrame();
     78 
     79  nsMathMLChar
     80      mMathMLChar;  // Here is the MathMLChar that will deal with the operator.
     81  nsOperatorFlags mFlags;
     82  float mMinSize;
     83  float mMaxSize;
     84 
     85  bool UseMathMLChar();
     86 
     87  // overload the base method so that we can setup our nsMathMLChar
     88  void ProcessTextData();
     89 
     90  // helper to get our 'form' and lookup in the Operator Dictionary to fetch
     91  // our default data that may come from there, and to complete the setup
     92  // using attributes that we may have
     93  void ProcessOperatorData();
     94 
     95  // helper to double check thar our char should be rendered as a selected char
     96  bool IsFrameInSelection(nsIFrame* aFrame);
     97 };
     98 
     99 #endif /* nsMathMLmoFrame_h___ */