layout/generic/nsBulletFrame.h

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  37
  38 /* rendering object for list-item bullets */
  39
  40 #ifndef nsBulletFrame_h___
  41 #define nsBulletFrame_h___
  42
  43 #include "nsFrame.h"
  44 #include "nsStyleContext.h"
  45
  46 #include "imgIRequest.h"
  47 #include "imgIDecoderObserver.h"
  48 class gfxIImageFrame;
  49
  50 /**
  51  * A simple class that manages the layout and rendering of html bullets.
  52  * This class also supports the CSS list-style properties.
  53  */
  54 class nsBulletFrame : public nsFrame {
  55 public:
  56   nsBulletFrame(nsStyleContext* aContext) : nsFrame(aContext) {}
  57   virtual ~nsBulletFrame();
  58
  59   // nsIFrame
  60   virtual void Destroy();
  61   NS_IMETHOD BuildDisplayList(nsDisplayListBuilder*   aBuilder,
  62                               const nsRect&           aDirtyRect,
  63                               const nsDisplayListSet& aLists);
  64   virtual nsIAtom* GetType() const;
  65   NS_IMETHOD DidSetStyleContext();
  66 #ifdef NS_DEBUG
  67   NS_IMETHOD GetFrameName(nsAString& aResult) const;
  68 #endif
  69
  70   // nsIHTMLReflow
  71   NS_IMETHOD Reflow(nsPresContext* aPresContext,
  72                     nsHTMLReflowMetrics& aMetrics,
  73                     const nsHTMLReflowState& aReflowState,
  74                     nsReflowStatus& aStatus);
  75   virtual nscoord GetMinWidth(nsIRenderingContext *aRenderingContext);
  76   virtual nscoord GetPrefWidth(nsIRenderingContext *aRenderingContext);
  77
  78   // nsBulletFrame
  79   PRInt32 SetListItemOrdinal(PRInt32 aNextOrdinal, PRBool* aChanged);
  80
  81
  82   NS_IMETHOD OnStartContainer(imgIRequest *aRequest, imgIContainer *aImage);
  83   NS_IMETHOD OnDataAvailable(imgIRequest *aRequest,
  84                              gfxIImageFrame *aFrame,
  85                              const nsRect * rect);
  86   NS_IMETHOD OnStopDecode(imgIRequest *aRequest,
  87                           nsresult aStatus,
  88                           const PRUnichar *aStatusArg);
  89   NS_IMETHOD FrameChanged(imgIContainer *aContainer,
  90                           gfxIImageFrame *aNewframe,
  91                           nsRect *aDirtyRect);
  92
  93   /* get list item text, without '.' */
  94   static PRBool AppendCounterText(PRInt32 aListStyleType,
  95                                   PRInt32 aOrdinal,
  96                                   nsString& aResult);
  97
  98   /* get list item text, with '.' */
  99   PRBool GetListItemText(const nsStyleList& aStyleList,
 100                          nsString& aResult);
 101
 102   void PaintBullet(nsIRenderingContext& aRenderingContext, nsPoint aPt,
 103                    const nsRect& aDirtyRect);
 104
 105 protected:
 106   void GetDesiredSize(nsPresContext* aPresContext,
 107                       nsIRenderingContext *aRenderingContext,
 108                       nsHTMLReflowMetrics& aMetrics);
 109
 110   void GetLoadGroup(nsPresContext *aPresContext, nsILoadGroup **aLoadGroup);
 111
 112   PRInt32 mOrdinal;
 113   nsMargin mPadding;
 114   nsCOMPtr<imgIRequest> mImageRequest;
 115   nsCOMPtr<imgIDecoderObserver> mListener;
 116
 117   nsSize mIntrinsicSize;
 118   nsSize mComputedSize;
 119   PRBool mTextIsRTL;
 120 };
 121
 122 #endif /* nsBulletFrame_h___ */