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/* -*- 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 __NS_SVGLENGTH2_H__
#define __NS_SVGLENGTH2_H__
#include "mozilla/Attributes.h"
#include "nsCoord.h"
#include "nsCycleCollectionParticipant.h"
#include "nsError.h"
#include "nsIDOMSVGLength.h"
#include "nsISMILAttr.h"
#include "nsMathUtils.h"
#include "nsSVGElement.h"
#include "SVGContentUtils.h"
#include "mozilla/gfx/Rect.h"
class nsIFrame;
class nsSMILValue;
namespace mozilla {
class DOMSVGLength;
namespace dom {
class SVGAnimatedLength;
class SVGAnimationElement;
class SVGSVGElement;
} // namespace dom
} // namespace mozilla
namespace mozilla {
namespace dom {
class UserSpaceMetrics
{
public:
virtual ~UserSpaceMetrics() {}
virtual float GetEmLength() const = 0;
virtual float GetExLength() const = 0;
virtual float GetAxisLength(uint8_t aCtxType) const = 0;
};
class UserSpaceMetricsWithSize : public UserSpaceMetrics
{
public:
virtual gfx::Size GetSize() const = 0;
virtual float GetAxisLength(uint8_t aCtxType) const override;
};
class SVGElementMetrics : public UserSpaceMetrics
{
public:
explicit SVGElementMetrics(nsSVGElement* aSVGElement,
mozilla::dom::SVGSVGElement* aCtx = nullptr);
virtual float GetEmLength() const override;
virtual float GetExLength() const override;
virtual float GetAxisLength(uint8_t aCtxType) const override;
private:
bool EnsureCtx() const;
nsSVGElement* mSVGElement;
mutable mozilla::dom::SVGSVGElement* mCtx;
};
class NonSVGFrameUserSpaceMetrics : public UserSpaceMetricsWithSize
{
public:
explicit NonSVGFrameUserSpaceMetrics(nsIFrame* aFrame);
virtual float GetEmLength() const override;
virtual float GetExLength() const override;
virtual gfx::Size GetSize() const override;
private:
nsIFrame* mFrame;
};
} // namespace dom
} // namespace mozilla
class nsSVGLength2
{
friend class mozilla::dom::SVGAnimatedLength;
friend class mozilla::DOMSVGLength;
typedef mozilla::dom::UserSpaceMetrics UserSpaceMetrics;
public:
void Init(uint8_t aCtxType = SVGContentUtils::XY,
uint8_t aAttrEnum = 0xff,
float aValue = 0,
uint8_t aUnitType = nsIDOMSVGLength::SVG_LENGTHTYPE_NUMBER) {
mAnimVal = mBaseVal = aValue;
mSpecifiedUnitType = aUnitType;
mAttrEnum = aAttrEnum;
mCtxType = aCtxType;
mIsAnimated = false;
mIsBaseSet = false;
}
nsSVGLength2& operator=(const nsSVGLength2& aLength) {
mBaseVal = aLength.mBaseVal;
mAnimVal = aLength.mAnimVal;
mSpecifiedUnitType = aLength.mSpecifiedUnitType;
mIsAnimated = aLength.mIsAnimated;
mIsBaseSet = aLength.mIsBaseSet;
return *this;
}
nsresult SetBaseValueString(const nsAString& aValue,
nsSVGElement *aSVGElement,
bool aDoSetAttr);
void GetBaseValueString(nsAString& aValue) const;
void GetAnimValueString(nsAString& aValue) const;
float GetBaseValue(nsSVGElement* aSVGElement) const
{ return mBaseVal / GetUnitScaleFactor(aSVGElement, mSpecifiedUnitType); }
float GetAnimValue(nsSVGElement* aSVGElement) const
{ return mAnimVal / GetUnitScaleFactor(aSVGElement, mSpecifiedUnitType); }
float GetAnimValue(nsIFrame* aFrame) const
{ return mAnimVal / GetUnitScaleFactor(aFrame, mSpecifiedUnitType); }
float GetAnimValue(mozilla::dom::SVGSVGElement* aCtx) const
{ return mAnimVal / GetUnitScaleFactor(aCtx, mSpecifiedUnitType); }
float GetAnimValue(const UserSpaceMetrics& aMetrics) const
{ return mAnimVal / GetUnitScaleFactor(aMetrics, mSpecifiedUnitType); }
uint8_t GetCtxType() const { return mCtxType; }
uint8_t GetSpecifiedUnitType() const { return mSpecifiedUnitType; }
bool IsPercentage() const
{ return mSpecifiedUnitType == nsIDOMSVGLength::SVG_LENGTHTYPE_PERCENTAGE; }
float GetAnimValInSpecifiedUnits() const { return mAnimVal; }
float GetBaseValInSpecifiedUnits() const { return mBaseVal; }
float GetBaseValue(mozilla::dom::SVGSVGElement* aCtx) const
{ return mBaseVal / GetUnitScaleFactor(aCtx, mSpecifiedUnitType); }
bool HasBaseVal() const {
return mIsBaseSet;
}
// Returns true if the animated value of this length has been explicitly
// set (either by animation, or by taking on the base value which has been
// explicitly set by markup or a DOM call), false otherwise.
// If this returns false, the animated value is still valid, that is,
// useable, and represents the default base value of the attribute.
bool IsExplicitlySet() const
{ return mIsAnimated || mIsBaseSet; }
already_AddRefed<mozilla::dom::SVGAnimatedLength>
ToDOMAnimatedLength(nsSVGElement* aSVGElement);
// Returns a new nsISMILAttr object that the caller must delete
nsISMILAttr* ToSMILAttr(nsSVGElement* aSVGElement);
private:
float mAnimVal;
float mBaseVal;
uint8_t mSpecifiedUnitType;
uint8_t mAttrEnum; // element specified tracking for attribute
uint8_t mCtxType; // X, Y or Unspecified
bool mIsAnimated:1;
bool mIsBaseSet:1;
float GetUnitScaleFactor(nsIFrame *aFrame, uint8_t aUnitType) const;
float GetUnitScaleFactor(const UserSpaceMetrics& aMetrics, uint8_t aUnitType) const;
float GetUnitScaleFactor(nsSVGElement *aSVGElement, uint8_t aUnitType) const;
float GetUnitScaleFactor(mozilla::dom::SVGSVGElement *aCtx, uint8_t aUnitType) const;
// SetBaseValue and SetAnimValue set the value in user units
void SetBaseValue(float aValue, nsSVGElement *aSVGElement, bool aDoSetAttr);
void SetBaseValueInSpecifiedUnits(float aValue, nsSVGElement *aSVGElement,
bool aDoSetAttr);
void SetAnimValue(float aValue, nsSVGElement *aSVGElement);
void SetAnimValueInSpecifiedUnits(float aValue, nsSVGElement *aSVGElement);
nsresult NewValueSpecifiedUnits(uint16_t aUnitType, float aValue,
nsSVGElement *aSVGElement);
nsresult ConvertToSpecifiedUnits(uint16_t aUnitType, nsSVGElement *aSVGElement);
nsresult ToDOMBaseVal(mozilla::DOMSVGLength **aResult, nsSVGElement* aSVGElement);
nsresult ToDOMAnimVal(mozilla::DOMSVGLength **aResult, nsSVGElement* aSVGElement);
public:
struct SMILLength : public nsISMILAttr
{
public:
SMILLength(nsSVGLength2* 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.
nsSVGLength2* 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;
};
};
#endif // __NS_SVGLENGTH2_H__
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