/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */

/* vim: set ts=8 sts=2 et sw=2 tw=80: */

/* 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 MOZILLA_SVGANIMATEDPRESERVEASPECTRATIO_H__

#define MOZILLA_SVGANIMATEDPRESERVEASPECTRATIO_H__

#include "nsCycleCollectionParticipant.h"

#include "nsError.h"

#include "nsISMILAttr.h"

#include "nsSVGElement.h"

#include "SVGPreserveAspectRatio.h"

#include "mozilla/Attributes.h"

#include "mozilla/UniquePtr.h"

class nsSMILValue;

namespace mozilla {

namespace dom {

class DOMSVGAnimatedPreserveAspectRatio;

class SVGAnimationElement;

} // namespace dom

class SVGAnimatedPreserveAspectRatio final

{

public:

  void Init() {

    mBaseVal.mAlign =

      dom::SVGPreserveAspectRatio_Binding::SVG_PRESERVEASPECTRATIO_XMIDYMID;

    mBaseVal.mMeetOrSlice =

      dom::SVGPreserveAspectRatio_Binding::SVG_MEETORSLICE_MEET;

    mAnimVal = mBaseVal;

    mIsAnimated = false;

    mIsBaseSet = false;

  }

  nsresult SetBaseValueString(const nsAString& aValue,

                              nsSVGElement *aSVGElement,

                              bool aDoSetAttr);

  void GetBaseValueString(nsAString& aValue) const;

  void SetBaseValue(const SVGPreserveAspectRatio &aValue,

                    nsSVGElement *aSVGElement);

  nsresult SetBaseAlign(uint16_t aAlign, nsSVGElement *aSVGElement) {

    if (aAlign < SVG_ALIGN_MIN_VALID || aAlign > SVG_ALIGN_MAX_VALID) {

      return NS_ERROR_FAILURE;

    }

    SetBaseValue(SVGPreserveAspectRatio(aAlign, mBaseVal.GetMeetOrSlice()),

                 aSVGElement);

    return NS_OK;

  }

  nsresult SetBaseMeetOrSlice(uint16_t aMeetOrSlice, nsSVGElement *aSVGElement) {

    if (aMeetOrSlice < SVG_MEETORSLICE_MIN_VALID ||

        aMeetOrSlice > SVG_MEETORSLICE_MAX_VALID) {

      return NS_ERROR_FAILURE;

    }

    SetBaseValue(SVGPreserveAspectRatio(mBaseVal.GetAlign(), aMeetOrSlice),

                 aSVGElement);

    return NS_OK;

  }

  void SetAnimValue(uint64_t aPackedValue, nsSVGElement *aSVGElement);

  const SVGPreserveAspectRatio &GetBaseValue() const

    { return mBaseVal; }

  const SVGPreserveAspectRatio &GetAnimValue() const

    { return mAnimVal; }

  bool IsAnimated() const

    { return mIsAnimated; }

  bool IsExplicitlySet() const

    { return mIsAnimated || mIsBaseSet; }

  already_AddRefed<mozilla::dom::DOMSVGAnimatedPreserveAspectRatio>

  ToDOMAnimatedPreserveAspectRatio(nsSVGElement* aSVGElement);

  UniquePtr<nsISMILAttr> ToSMILAttr(nsSVGElement* aSVGElement);

private:

  SVGPreserveAspectRatio mAnimVal;

  SVGPreserveAspectRatio mBaseVal;

  bool mIsAnimated;

  bool mIsBaseSet;

public:

  struct SMILPreserveAspectRatio final : public nsISMILAttr

  {

  public:

    SMILPreserveAspectRatio(SVGAnimatedPreserveAspectRatio* 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.

    SVGAnimatedPreserveAspectRatio* mVal;

    nsSVGElement* mSVGElement;

    // nsISMILAttr methods

    virtual nsresult ValueFromString(const nsAString& aStr,

                                     const dom::SVGAnimationElement* aSrcElement,

                                     nsSMILValue& aValue,

                                     bool& aPreventCachingOfSandwich) const override;

    virtual nsSMILValue GetBaseValue() const override;

    virtual void ClearAnimValue() override;

    virtual nsresult SetAnimValue(const nsSMILValue& aValue) override;

  };

};

namespace dom {

class DOMSVGAnimatedPreserveAspectRatio final : public nsISupports,

                                                public nsWrapperCache

{

  ~DOMSVGAnimatedPreserveAspectRatio();

  NS_DECL_CYCLE_COLLECTING_ISUPPORTS

  NS_DECL_CYCLE_COLLECTION_SCRIPT_HOLDER_CLASS(DOMSVGAnimatedPreserveAspectRatio)

  DOMSVGAnimatedPreserveAspectRatio(SVGAnimatedPreserveAspectRatio* aVal,

                                    nsSVGElement *aSVGElement)

    : mVal(aVal), mSVGElement(aSVGElement)

  {

  }

  // WebIDL

  nsSVGElement* GetParentObject() const { return mSVGElement; }

  virtual JSObject* WrapObject(JSContext* aCx, JS::Handle<JSObject*> aGivenProto) override;

  // These aren't weak refs because new objects are returned each time

  already_AddRefed<DOMSVGPreserveAspectRatio> BaseVal();

  already_AddRefed<DOMSVGPreserveAspectRatio> AnimVal();

protected:

  // kept alive because it belongs to content:

  SVGAnimatedPreserveAspectRatio* mVal;

  RefPtr<nsSVGElement> mSVGElement;

};

} // namespace dom

} // namespace mozilla

#endif // MOZILLA_SVGANIMATEDPRESERVEASPECTRATIO_H__