gecko/layout/svg/base/src/nsSVGTextPathFrame.h

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 * The Original Code is the Mozilla SVG project.
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#ifndef NSSVGTEXTPATHFRAME_H
#define NSSVGTEXTPATHFRAME_H

#include "nsSVGTSpanFrame.h"
#include "nsISVGValueObserver.h"
#include "nsWeakReference.h"
#include "nsIDOMSVGAnimatedString.h"
#include "nsIDOMSVGPathSegList.h"
#include "nsSVGLengthList.h"
#include "nsIDOMSVGLength.h"

class nsSVGFlattenedPath;

typedef nsSVGTSpanFrame nsSVGTextPathFrameBase;

class nsSVGTextPathFrame : public nsSVGTextPathFrameBase,
                           public nsISVGValueObserver
{
public:
  nsSVGTextPathFrame(nsStyleContext* aContext) : nsSVGTextPathFrameBase(aContext) {}

  // nsIFrame:
  NS_IMETHOD Init(nsIContent*      aContent,
                  nsIFrame*        aParent,
                  nsIFrame*        aPrevInFlow);
  NS_IMETHOD  AttributeChanged(PRInt32         aNameSpaceID,
                               nsIAtom*        aAttribute,
                               PRInt32         aModType);
  /**
   * Get the "type" of the frame
   *
   * @see nsGkAtoms::svgGFrame
   */
  virtual nsIAtom* GetType() const;

#ifdef DEBUG
  NS_IMETHOD GetFrameName(nsAString& aResult) const
  {
    return MakeFrameName(NS_LITERAL_STRING("SVGTextPath"), aResult);
  }
#endif

  // nsISVGValueObserver interface:
  NS_IMETHOD WillModifySVGObservable(nsISVGValue* observable,
                                     nsISVGValue::modificationType aModType);
  NS_IMETHOD DidModifySVGObservable(nsISVGValue* observable,
                                    nsISVGValue::modificationType aModType);

  // nsSVGTextPathFrame methods:
  nsSVGFlattenedPath *GetFlattenedPath();
  nsIFrame *GetPathFrame();

   // nsISupports interface:
  NS_IMETHOD QueryInterface(const nsIID& aIID, void** aInstancePtr);
private:
  NS_IMETHOD_(nsrefcnt) AddRef() { return 1; }
  NS_IMETHOD_(nsrefcnt) Release() { return 1; }

protected:
  virtual ~nsSVGTextPathFrame();

  NS_IMETHOD_(already_AddRefed<nsIDOMSVGLengthList>) GetX();
  NS_IMETHOD_(already_AddRefed<nsIDOMSVGLengthList>) GetY();
  NS_IMETHOD_(already_AddRefed<nsIDOMSVGLengthList>) GetDx();
  NS_IMETHOD_(already_AddRefed<nsIDOMSVGLengthList>) GetDy();

private:

  nsCOMPtr<nsIDOMSVGLength> mStartOffset;
  nsCOMPtr<nsIDOMSVGAnimatedString> mHref;
  nsCOMPtr<nsIDOMSVGPathSegList> mSegments;

  nsCOMPtr<nsIDOMSVGLengthList> mX;
};

#endif