layout/generic/nsFirstLetterFrame.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 nsFirstLetterFrame_h__
   7 #define nsFirstLetterFrame_h__
   8
   9 /* rendering object for CSS :first-letter pseudo-element */
  10
  11 #include "mozilla/Attributes.h"
  12 #include "nsContainerFrame.h"
  13
  14 class nsFirstLetterFrame MOZ_FINAL : public nsContainerFrame {
  15 public:
  16   NS_DECL_QUERYFRAME_TARGET(nsFirstLetterFrame)
  17   NS_DECL_QUERYFRAME
  18   NS_DECL_FRAMEARENA_HELPERS
  19
  20   explicit nsFirstLetterFrame(nsStyleContext* aContext) : nsContainerFrame(aContext) {}
  21
  22   virtual void BuildDisplayList(nsDisplayListBuilder*   aBuilder,
  23                                 const nsRect&           aDirtyRect,
  24                                 const nsDisplayListSet& aLists) MOZ_OVERRIDE;
  25
  26   virtual void Init(nsIContent*       aContent,
  27                     nsContainerFrame* aParent,
  28                     nsIFrame*         aPrevInFlow) MOZ_OVERRIDE;
  29   virtual void SetInitialChildList(ChildListID     aListID,
  30                                    nsFrameList&    aChildList) MOZ_OVERRIDE;
  31 #ifdef DEBUG_FRAME_DUMP
  32   virtual nsresult GetFrameName(nsAString& aResult) const MOZ_OVERRIDE;
  33 #endif
  34   virtual nsIAtom* GetType() const MOZ_OVERRIDE;
  35
  36   bool IsFloating() const { return GetStateBits() & NS_FRAME_OUT_OF_FLOW; }
  37
  38   virtual bool IsFrameOfType(uint32_t aFlags) const MOZ_OVERRIDE
  39   {
  40     if (!IsFloating())
  41       aFlags = aFlags & ~(nsIFrame::eLineParticipant);
  42     return nsContainerFrame::IsFrameOfType(aFlags &
  43       ~(nsIFrame::eBidiInlineContainer));
  44   }
  45
  46   virtual nscoord GetMinISize(nsRenderingContext *aRenderingContext) MOZ_OVERRIDE;
  47   virtual nscoord GetPrefISize(nsRenderingContext *aRenderingContext) MOZ_OVERRIDE;
  48   virtual void AddInlineMinISize(nsRenderingContext *aRenderingContext,
  49                                  InlineMinISizeData *aData) MOZ_OVERRIDE;
  50   virtual void AddInlinePrefISize(nsRenderingContext *aRenderingContext,
  51                                   InlinePrefISizeData *aData) MOZ_OVERRIDE;
  52
  53   virtual mozilla::LogicalSize
  54   ComputeSize(nsRenderingContext *aRenderingContext,
  55               mozilla::WritingMode aWritingMode,
  56               const mozilla::LogicalSize& aCBSize,
  57               nscoord aAvailableISize,
  58               const mozilla::LogicalSize& aMargin,
  59               const mozilla::LogicalSize& aBorder,
  60               const mozilla::LogicalSize& aPadding,
  61               uint32_t aFlags) MOZ_OVERRIDE;
  62
  63   virtual void Reflow(nsPresContext*           aPresContext,
  64                       nsHTMLReflowMetrics&     aDesiredSize,
  65                       const nsHTMLReflowState& aReflowState,
  66                       nsReflowStatus&          aStatus) MOZ_OVERRIDE;
  67
  68   virtual bool CanContinueTextRun() const MOZ_OVERRIDE;
  69   virtual nscoord GetLogicalBaseline(mozilla::WritingMode aWritingMode) const MOZ_OVERRIDE;
  70   virtual LogicalSides GetLogicalSkipSides(const nsHTMLReflowState* aReflowState = nullptr) const MOZ_OVERRIDE;
  71
  72 //override of nsFrame method
  73   virtual nsresult GetChildFrameContainingOffset(int32_t inContentOffset,
  74                                                  bool inHint,
  75                                                  int32_t* outFrameContentOffset,
  76                                                  nsIFrame** outChildFrame) MOZ_OVERRIDE;
  77
  78   nscoord GetFirstLetterBaseline() const { return mBaseline; }
  79
  80   // For floating first letter frames, create a continuation for aChild and
  81   // place it in the correct place. aContinuation is an outparam for the
  82   // continuation that is created. aIsFluid determines if the continuation is
  83   // fluid or not.
  84   nsresult CreateContinuationForFloatingParent(nsPresContext* aPresContext,
  85                                                nsIFrame* aChild,
  86                                                nsIFrame** aContinuation,
  87                                                bool aIsFluid);
  88
  89 protected:
  90   nscoord mBaseline;
  91
  92   void DrainOverflowFrames(nsPresContext* aPresContext);
  93 };
  94
  95 #endif /* nsFirstLetterFrame_h__ */