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/* -*- Mode: C++; tab-width: 8; 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_SVGVIEWBOX_H__
#define __NS_SVGVIEWBOX_H__
#include "nsAutoPtr.h"
#include "nsCycleCollectionParticipant.h"
#include "nsError.h"
#include "mozilla/dom/SVGAnimatedRect.h"
#include "mozilla/dom/SVGIRect.h"
#include "nsISMILAttr.h"
#include "nsSVGElement.h"
#include "mozilla/Attributes.h"
#include "nsSVGAttrTearoffTable.h"
class nsSMILValue;
namespace mozilla {
namespace dom {
class SVGAnimationElement;
} // namespace dom
} // namespace mozilla
struct nsSVGViewBoxRect
{
float x, y;
float width, height;
bool none;
nsSVGViewBoxRect() : none(true) {}
nsSVGViewBoxRect(float aX, float aY, float aWidth, float aHeight) :
x(aX), y(aY), width(aWidth), height(aHeight), none(false) {}
nsSVGViewBoxRect(const nsSVGViewBoxRect& rhs) :
x(rhs.x), y(rhs.y), width(rhs.width), height(rhs.height), none(rhs.none) {}
bool operator==(const nsSVGViewBoxRect& aOther) const;
};
class nsSVGViewBox
{
public:
void Init();
/**
* Returns true if the corresponding "viewBox" attribute defined a rectangle
* with finite values and nonnegative width/height.
* Returns false if the viewBox was set to an invalid
* string, or if any of the four rect values were too big to store in a
* float, or the width/height are negative.
*/
bool HasRect() const;
/**
* Returns true if the corresponding "viewBox" attribute either defined a
* rectangle with finite values or the special "none" value.
*/
bool IsExplicitlySet() const
{
if (mAnimVal || mHasBaseVal) {
const nsSVGViewBoxRect& rect = GetAnimValue();
return rect.none || (rect.width >= 0 && rect.height >= 0);
}
return false;
}
const nsSVGViewBoxRect& GetBaseValue() const
{ return mBaseVal; }
void SetBaseValue(const nsSVGViewBoxRect& aRect,
nsSVGElement *aSVGElement);
const nsSVGViewBoxRect& GetAnimValue() const
{ return mAnimVal ? *mAnimVal : mBaseVal; }
void SetAnimValue(const nsSVGViewBoxRect& aRect,
nsSVGElement *aSVGElement);
nsresult SetBaseValueString(const nsAString& aValue,
nsSVGElement *aSVGElement,
bool aDoSetAttr);
void GetBaseValueString(nsAString& aValue) const;
already_AddRefed<mozilla::dom::SVGAnimatedRect>
ToSVGAnimatedRect(nsSVGElement *aSVGElement);
already_AddRefed<mozilla::dom::SVGIRect>
ToDOMBaseVal(nsSVGElement* aSVGElement);
already_AddRefed<mozilla::dom::SVGIRect>
ToDOMAnimVal(nsSVGElement* aSVGElement);
// Returns a new nsISMILAttr object that the caller must delete
nsISMILAttr* ToSMILAttr(nsSVGElement* aSVGElement);
private:
nsSVGViewBoxRect mBaseVal;
nsAutoPtr<nsSVGViewBoxRect> mAnimVal;
bool mHasBaseVal;
public:
struct DOMBaseVal final : public mozilla::dom::SVGIRect
{
NS_DECL_CYCLE_COLLECTING_ISUPPORTS
NS_DECL_CYCLE_COLLECTION_SCRIPT_HOLDER_CLASS(DOMBaseVal)
DOMBaseVal(nsSVGViewBox *aVal, nsSVGElement *aSVGElement)
: mozilla::dom::SVGIRect()
, mVal(aVal)
, mSVGElement(aSVGElement)
{}
nsSVGViewBox* mVal; // kept alive because it belongs to content
RefPtr<nsSVGElement> mSVGElement;
float X() const override final
{
return mVal->GetBaseValue().x;
}
float Y() const override final
{
return mVal->GetBaseValue().y;
}
float Width() const override final
{
return mVal->GetBaseValue().width;
}
float Height() const override final
{
return mVal->GetBaseValue().height;
}
void SetX(float aX, mozilla::ErrorResult& aRv) final override;
void SetY(float aY, mozilla::ErrorResult& aRv) final override;
void SetWidth(float aWidth, mozilla::ErrorResult& aRv) final override;
void SetHeight(float aHeight, mozilla::ErrorResult& aRv) final override;
virtual nsIContent* GetParentObject() const override
{
return mSVGElement;
}
private:
virtual ~DOMBaseVal();
};
struct DOMAnimVal final : public mozilla::dom::SVGIRect
{
NS_DECL_CYCLE_COLLECTING_ISUPPORTS
NS_DECL_CYCLE_COLLECTION_SCRIPT_HOLDER_CLASS(DOMAnimVal)
DOMAnimVal(nsSVGViewBox *aVal, nsSVGElement *aSVGElement)
: mozilla::dom::SVGIRect()
, mVal(aVal)
, mSVGElement(aSVGElement)
{}
nsSVGViewBox* mVal; // kept alive because it belongs to content
RefPtr<nsSVGElement> mSVGElement;
// Script may have modified animation parameters or timeline -- DOM getters
// need to flush any resample requests to reflect these modifications.
float X() const override final
{
mSVGElement->FlushAnimations();
return mVal->GetAnimValue().x;
}
float Y() const override final
{
mSVGElement->FlushAnimations();
return mVal->GetAnimValue().y;
}
float Width() const override final
{
mSVGElement->FlushAnimations();
return mVal->GetAnimValue().width;
}
float Height() const override final
{
mSVGElement->FlushAnimations();
return mVal->GetAnimValue().height;
}
void SetX(float aX, mozilla::ErrorResult& aRv) final override
{
aRv.Throw(NS_ERROR_DOM_NO_MODIFICATION_ALLOWED_ERR);
}
void SetY(float aY, mozilla::ErrorResult& aRv) final override
{
aRv.Throw(NS_ERROR_DOM_NO_MODIFICATION_ALLOWED_ERR);
}
void SetWidth(float aWidth, mozilla::ErrorResult& aRv) final override
{
aRv.Throw(NS_ERROR_DOM_NO_MODIFICATION_ALLOWED_ERR);
}
void SetHeight(float aHeight, mozilla::ErrorResult& aRv) final override
{
aRv.Throw(NS_ERROR_DOM_NO_MODIFICATION_ALLOWED_ERR);
}
virtual nsIContent* GetParentObject() const override
{
return mSVGElement;
}
private:
virtual ~DOMAnimVal();
};
struct SMILViewBox : public nsISMILAttr
{
public:
SMILViewBox(nsSVGViewBox* 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.
nsSVGViewBox* mVal;
nsSVGElement* mSVGElement;
// nsISMILAttr methods
virtual nsresult ValueFromString(const nsAString& aStr,
const mozilla::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;
};
static nsSVGAttrTearoffTable<nsSVGViewBox, mozilla::dom::SVGAnimatedRect>
sSVGAnimatedRectTearoffTable;
};
#endif // __NS_SVGVIEWBOX_H__
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