layout/mathml/nsMathMLmpaddedFrame.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 nsMathMLmpaddedFrame_h___
   7 #define nsMathMLmpaddedFrame_h___
   8
   9 #include "mozilla/Attributes.h"
  10 #include "nsMathMLContainerFrame.h"
  11
  12 //
  13 // <mpadded> -- adjust space around content
  14 //
  15
  16 class nsMathMLmpaddedFrame : public nsMathMLContainerFrame {
  17 public:
  18   NS_DECL_FRAMEARENA_HELPERS
  19
  20   friend nsIFrame* NS_NewMathMLmpaddedFrame(nsIPresShell* aPresShell, nsStyleContext* aContext);
  21
  22   NS_IMETHOD
  23   InheritAutomaticData(nsIFrame* aParent) MOZ_OVERRIDE;
  24
  25   NS_IMETHOD
  26   TransmitAutomaticData() MOZ_OVERRIDE {
  27     return TransmitAutomaticDataForMrowLikeElement();
  28   }
  29
  30   virtual void
  31   Reflow(nsPresContext*          aPresContext,
  32          nsHTMLReflowMetrics&     aDesiredSize,
  33          const nsHTMLReflowState& aReflowState,
  34          nsReflowStatus&          aStatus) MOZ_OVERRIDE;
  35
  36   virtual nsresult
  37   Place(nsRenderingContext& aRenderingContext,
  38         bool                 aPlaceOrigin,
  39         nsHTMLReflowMetrics& aDesiredSize) MOZ_OVERRIDE;
  40
  41   bool
  42   IsMrowLike() MOZ_OVERRIDE {
  43     return mFrames.FirstChild() != mFrames.LastChild() ||
  44            !mFrames.FirstChild();
  45   }
  46
  47 protected:
  48   explicit nsMathMLmpaddedFrame(nsStyleContext* aContext) : nsMathMLContainerFrame(aContext) {}
  49   virtual ~nsMathMLmpaddedFrame();
  50
  51   virtual nsresult
  52   MeasureForWidth(nsRenderingContext& aRenderingContext,
  53                   nsHTMLReflowMetrics& aDesiredSize) MOZ_OVERRIDE;
  54
  55 private:
  56   nsCSSValue mWidth;
  57   nsCSSValue mHeight;
  58   nsCSSValue mDepth;
  59   nsCSSValue mLeadingSpace;
  60   nsCSSValue mVerticalOffset;
  61
  62   int32_t    mWidthSign;
  63   int32_t    mHeightSign;
  64   int32_t    mDepthSign;
  65   int32_t    mLeadingSpaceSign;
  66   int32_t    mVerticalOffsetSign;
  67
  68   int32_t    mWidthPseudoUnit;
  69   int32_t    mHeightPseudoUnit;
  70   int32_t    mDepthPseudoUnit;
  71   int32_t    mLeadingSpacePseudoUnit;
  72   int32_t    mVerticalOffsetPseudoUnit;
  73
  74   // helpers to process the attributes
  75   void
  76   ProcessAttributes();
  77
  78   static bool
  79   ParseAttribute(nsString&   aString,
  80                  int32_t&    aSign,
  81                  nsCSSValue& aCSSValue,
  82                  int32_t&    aPseudoUnit);
  83
  84   void
  85   UpdateValue(int32_t                  aSign,
  86               int32_t                  aPseudoUnit,
  87               const nsCSSValue&        aCSSValue,
  88               const nsHTMLReflowMetrics& aDesiredSize,
  89               nscoord&                 aValueToUpdate,
  90               float                    aFontSizeInflation) const;
  91 };
  92
  93 #endif /* nsMathMLmpaddedFrame_h___ */