layout/mathml/nsMathMLmoFrame.h

   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 "mozilla/Attributes.h"
  11 #include "nsMathMLTokenFrame.h"
  12 #include "nsMathMLChar.h"
  13
  14 namespace mozilla {
  15 class PresShell;
  16 }  // namespace mozilla
  17
  18 //
  19 // <mo> -- operator, fence, or separator
  20 //
  21
  22 class nsMathMLmoFrame final : public nsMathMLTokenFrame {
  23  public:
  24   NS_DECL_FRAMEARENA_HELPERS(nsMathMLmoFrame)
  25
  26   friend nsIFrame* NS_NewMathMLmoFrame(mozilla::PresShell* aPresShell,
  27                                        ComputedStyle* aStyle);
  28
  29   eMathMLFrameType GetMathMLFrameType() override;
  30
  31   void DidSetComputedStyle(ComputedStyle* aOldStyle) override;
  32
  33   void BuildDisplayList(nsDisplayListBuilder* aBuilder,
  34                         const nsDisplayListSet& aLists) override;
  35
  36   NS_IMETHOD
  37   InheritAutomaticData(nsIFrame* aParent) override;
  38
  39   NS_IMETHOD
  40   TransmitAutomaticData() override;
  41
  42   void SetInitialChildList(ChildListID aListID,
  43                            nsFrameList&& aChildList) override;
  44
  45   virtual void Reflow(nsPresContext* aPresContext, ReflowOutput& aDesiredSize,
  46                       const ReflowInput& aReflowInput,
  47                       nsReflowStatus& aStatus) override;
  48
  49   virtual nsresult Place(DrawTarget* aDrawTarget, bool aPlaceOrigin,
  50                          ReflowOutput& aDesiredSize) override;
  51
  52   virtual void MarkIntrinsicISizesDirty() override;
  53
  54   virtual void GetIntrinsicISizeMetrics(gfxContext* aRenderingContext,
  55                                         ReflowOutput& aDesiredSize) override;
  56
  57   virtual nsresult AttributeChanged(int32_t aNameSpaceID, nsAtom* aAttribute,
  58                                     int32_t aModType) override;
  59
  60   // This method is called by the parent frame to ask <mo>
  61   // to stretch itself.
  62   NS_IMETHOD
  63   Stretch(DrawTarget* aDrawTarget, nsStretchDirection aStretchDirection,
  64           nsBoundingMetrics& aContainerSize,
  65           ReflowOutput& aDesiredStretchSize) override;
  66
  67   virtual nsresult ChildListChanged(int32_t aModType) override {
  68     ProcessTextData();
  69     return nsMathMLContainerFrame::ChildListChanged(aModType);
  70   }
  71
  72  protected:
  73   explicit nsMathMLmoFrame(ComputedStyle* aStyle, nsPresContext* aPresContext)
  74       : nsMathMLTokenFrame(aStyle, aPresContext, kClassID),
  75         mFlags(0),
  76         mMinSize(0),
  77         mMaxSize(0) {}
  78   virtual ~nsMathMLmoFrame();
  79
  80   nsMathMLChar
  81       mMathMLChar;  // Here is the MathMLChar that will deal with the operator.
  82   nsOperatorFlags mFlags;
  83   float mMinSize;
  84   float mMaxSize;
  85
  86   bool UseMathMLChar();
  87
  88   // overload the base method so that we can setup our nsMathMLChar
  89   void ProcessTextData();
  90
  91   // helper to get our 'form' and lookup in the Operator Dictionary to fetch
  92   // our default data that may come from there, and to complete the setup
  93   // using attributes that we may have
  94   void ProcessOperatorData();
  95
  96   // helper to double check thar our char should be rendered as a selected char
  97   bool IsFrameInSelection(nsIFrame* aFrame);
  98 };
  99
 100 #endif /* nsMathMLmoFrame_h___ */