layout/mathml/nsMathMLmrootFrame.h

   1 /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
   2 /* This Source Code Form is subject to the terms of the Mozilla Public
   3  * License, v. 2.0. If a copy of the MPL was not distributed with this
   4  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
   5
   6 #ifndef nsMathMLmrootFrame_h___
   7 #define nsMathMLmrootFrame_h___
   8
   9 #include "mozilla/Attributes.h"
  10 #include "nsMathMLContainerFrame.h"
  11 #include "nsMathMLChar.h"
  12
  13 //
  14 // <msqrt> and <mroot> -- form a radical
  15 //
  16
  17 class nsMathMLmrootFrame : public nsMathMLContainerFrame {
  18 public:
  19   NS_DECL_FRAMEARENA_HELPERS
  20
  21   friend nsIFrame* NS_NewMathMLmrootFrame(nsIPresShell* aPresShell, nsStyleContext* aContext);
  22
  23   virtual void
  24   SetAdditionalStyleContext(int32_t          aIndex,
  25                             nsStyleContext*  aStyleContext) override;
  26   virtual nsStyleContext*
  27   GetAdditionalStyleContext(int32_t aIndex) const override;
  28
  29   virtual void
  30   Init(nsIContent*       aContent,
  31        nsContainerFrame* aParent,
  32        nsIFrame*         aPrevInFlow) override;
  33
  34   NS_IMETHOD
  35   TransmitAutomaticData() override;
  36
  37   virtual void
  38   Reflow(nsPresContext*          aPresContext,
  39          nsHTMLReflowMetrics&     aDesiredSize,
  40          const nsHTMLReflowState& aReflowState,
  41          nsReflowStatus&          aStatus) override;
  42
  43   void
  44   GetRadicalXOffsets(nscoord aIndexWidth, nscoord aSqrWidth,
  45                      nsFontMetrics* aFontMetrics,
  46                      nscoord* aIndexOffset,
  47                      nscoord* aSqrOffset);
  48
  49   virtual void
  50   GetIntrinsicISizeMetrics(nsRenderingContext* aRenderingContext,
  51                            nsHTMLReflowMetrics& aDesiredSize) override;
  52
  53   virtual void BuildDisplayList(nsDisplayListBuilder*   aBuilder,
  54                                 const nsRect&           aDirtyRect,
  55                                 const nsDisplayListSet& aLists) override;
  56
  57   uint8_t
  58   ScriptIncrement(nsIFrame* aFrame) override
  59   {
  60     return (aFrame && aFrame == mFrames.LastChild()) ? 2 : 0;
  61   }
  62
  63 protected:
  64   explicit nsMathMLmrootFrame(nsStyleContext* aContext);
  65   virtual ~nsMathMLmrootFrame();
  66
  67   nsMathMLChar mSqrChar;
  68   nsRect       mBarRect;
  69 };
  70
  71 #endif /* nsMathMLmrootFrame_h___ */