gecko-dev/dom/svg/nsSVGClass.h

/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

#ifndef __NS_SVGCLASS_H__
#define __NS_SVGCLASS_H__

#include "nsAutoPtr.h"
#include "nsCycleCollectionParticipant.h"
#include "nsError.h"
#include "nsISMILAttr.h"
#include "nsString.h"
#include "mozilla/Attributes.h"

class nsSVGElement;

namespace mozilla {
namespace dom {
class SVGAnimatedString;
}
}

class nsSVGClass
{

public:
  void Init() {
    mAnimVal = nullptr;
  }

  void SetBaseValue(const nsAString& aValue,
                    nsSVGElement *aSVGElement,
                    bool aDoSetAttr);
  void GetBaseValue(nsAString& aValue, const nsSVGElement *aSVGElement) const;

  void SetAnimValue(const nsAString& aValue, nsSVGElement *aSVGElement);
  void GetAnimValue(nsAString& aValue, const nsSVGElement *aSVGElement) const;
  bool IsAnimated() const
    { return !!mAnimVal; }

  already_AddRefed<mozilla::dom::SVGAnimatedString>
  ToDOMAnimatedString(nsSVGElement* aSVGElement);

  // Returns a new nsISMILAttr object that the caller must delete
  nsISMILAttr* ToSMILAttr(nsSVGElement *aSVGElement);

private:

  nsAutoPtr<nsString> mAnimVal;

public:
  struct SMILString : public nsISMILAttr
  {
  public:
    SMILString(nsSVGClass *aVal, nsSVGElement *aSVGElement)
      : mVal(aVal), mSVGElement(aSVGElement) {}

    // These will stay alive because a nsISMILAttr only lives as long
    // as the Compositing step, and DOM elements don't get a chance to
    // die during that.
    nsSVGClass* mVal;
    nsSVGElement* mSVGElement;

    // nsISMILAttr methods
    virtual nsresult ValueFromString(const nsAString& aStr,
                                     const mozilla::dom::SVGAnimationElement *aSrcElement,
                                     nsSMILValue& aValue,
                                     bool& aPreventCachingOfSandwich) const MOZ_OVERRIDE;
    virtual nsSMILValue GetBaseValue() const MOZ_OVERRIDE;
    virtual void ClearAnimValue() MOZ_OVERRIDE;
    virtual nsresult SetAnimValue(const nsSMILValue& aValue) MOZ_OVERRIDE;
  };
};
#endif //__NS_SVGCLASS_H__