gecko-dev/layout/generic/nsBulletFrame.h

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 * for the specific language governing rights and limitations under the
 * License.
 *
 * The Original Code is Mozilla Communicator client code.
 *
 * The Initial Developer of the Original Code is
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#ifndef nsBulletFrame_h___
#define nsBulletFrame_h___

#include "nsFrame.h"
#include "nsStyleContext.h"

#include "imgIRequest.h"
#include "imgIDecoderObserver.h"
class gfxIImageFrame;

/**
 * A simple class that manages the layout and rendering of html bullets.
 * This class also supports the CSS list-style properties.
 */
class nsBulletFrame : public nsFrame {
public:
  nsBulletFrame();
  virtual ~nsBulletFrame();

  // nsIFrame
  NS_IMETHOD Init(nsIPresContext*  aPresContext,
                  nsIContent*      aContent,
                  nsIFrame*        aParent,
                  nsStyleContext*  aContext,
                  nsIFrame*        aPrevInFlow);
  NS_IMETHOD Destroy(nsIPresContext* aPresContext);
  NS_IMETHOD Paint(nsIPresContext*      aCX,
                   nsIRenderingContext& aRenderingContext,
                   const nsRect&        aDirtyRect,
                   nsFramePaintLayer    aWhichLayer,
                   PRUint32             aFlags = 0);
  virtual nsIAtom* GetType() const;
#ifdef NS_DEBUG
  NS_IMETHOD GetFrameName(nsAString& aResult) const;
#endif

  // nsIHTMLReflow
  NS_IMETHOD Reflow(nsIPresContext* aPresContext,
                    nsHTMLReflowMetrics& aMetrics,
                    const nsHTMLReflowState& aReflowState,
                    nsReflowStatus& aStatus);

  // nsBulletFrame
  PRInt32 SetListItemOrdinal(PRInt32 aNextOrdinal, PRBool* aChanged);


  NS_IMETHOD OnStartContainer(imgIRequest *aRequest, imgIContainer *aImage);
  NS_IMETHOD OnDataAvailable(imgIRequest *aRequest,
                             gfxIImageFrame *aFrame,
                             const nsRect * rect);
  NS_IMETHOD OnStopDecode(imgIRequest *aRequest,
                          nsresult aStatus,
                          const PRUnichar *aStatusArg);
  NS_IMETHOD FrameChanged(imgIContainer *aContainer,
                          gfxIImageFrame *aNewframe,
                          nsRect *aDirtyRect);

protected:
  void GetDesiredSize(nsIPresContext* aPresContext,
                      const nsHTMLReflowState& aReflowState,
                      nsHTMLReflowMetrics& aMetrics);

  PRBool GetListItemText(nsIPresContext* aCX,
                         const nsStyleList& aStyleList,
                         nsString& aResult);

  void GetLoadGroup(nsIPresContext *aPresContext, nsILoadGroup **aLoadGroup);

  PRInt32 mOrdinal;
  nsMargin mPadding;
  nsCOMPtr<imgIRequest> mImageRequest;
  nsCOMPtr<imgIDecoderObserver> mListener;

  nsSize mIntrinsicSize;
  nsSize mComputedSize;
  nsIPresContext* mPresContext; // weak ref
};

#endif /* nsBulletFrame_h___ */