209 lines
7.1 KiB
C++
209 lines
7.1 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#ifndef __NS_SVGLENGTH2_H__
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#define __NS_SVGLENGTH2_H__
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#include "mozilla/Attributes.h"
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#include "nsCoord.h"
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#include "nsCycleCollectionParticipant.h"
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#include "nsError.h"
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#include "nsIDOMSVGLength.h"
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#include "nsISMILAttr.h"
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#include "nsMathUtils.h"
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#include "nsSVGElement.h"
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#include "SVGContentUtils.h"
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#include "mozilla/gfx/Rect.h"
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class nsIFrame;
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class nsSMILValue;
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namespace mozilla {
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class DOMSVGLength;
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namespace dom {
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class SVGAnimatedLength;
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class SVGAnimationElement;
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class SVGSVGElement;
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} // namespace dom
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} // namespace mozilla
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namespace mozilla {
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namespace dom {
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class UserSpaceMetrics
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{
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public:
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virtual ~UserSpaceMetrics() {}
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virtual float GetEmLength() const = 0;
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virtual float GetExLength() const = 0;
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virtual float GetAxisLength(uint8_t aCtxType) const = 0;
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};
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class UserSpaceMetricsWithSize : public UserSpaceMetrics
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{
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public:
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virtual gfx::Size GetSize() const = 0;
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virtual float GetAxisLength(uint8_t aCtxType) const override;
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};
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class SVGElementMetrics : public UserSpaceMetrics
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{
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public:
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explicit SVGElementMetrics(nsSVGElement* aSVGElement,
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mozilla::dom::SVGSVGElement* aCtx = nullptr);
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virtual float GetEmLength() const override;
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virtual float GetExLength() const override;
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virtual float GetAxisLength(uint8_t aCtxType) const override;
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private:
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bool EnsureCtx() const;
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nsSVGElement* mSVGElement;
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mutable mozilla::dom::SVGSVGElement* mCtx;
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};
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class NonSVGFrameUserSpaceMetrics : public UserSpaceMetricsWithSize
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{
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public:
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explicit NonSVGFrameUserSpaceMetrics(nsIFrame* aFrame);
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virtual float GetEmLength() const override;
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virtual float GetExLength() const override;
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virtual gfx::Size GetSize() const override;
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private:
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nsIFrame* mFrame;
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};
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} // namespace dom
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} // namespace mozilla
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class nsSVGLength2
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{
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friend class mozilla::dom::SVGAnimatedLength;
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friend class mozilla::DOMSVGLength;
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typedef mozilla::dom::UserSpaceMetrics UserSpaceMetrics;
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public:
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void Init(uint8_t aCtxType = SVGContentUtils::XY,
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uint8_t aAttrEnum = 0xff,
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float aValue = 0,
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uint8_t aUnitType = nsIDOMSVGLength::SVG_LENGTHTYPE_NUMBER) {
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mAnimVal = mBaseVal = aValue;
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mSpecifiedUnitType = aUnitType;
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mAttrEnum = aAttrEnum;
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mCtxType = aCtxType;
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mIsAnimated = false;
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mIsBaseSet = false;
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}
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nsSVGLength2& operator=(const nsSVGLength2& aLength) {
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mBaseVal = aLength.mBaseVal;
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mAnimVal = aLength.mAnimVal;
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mSpecifiedUnitType = aLength.mSpecifiedUnitType;
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mIsAnimated = aLength.mIsAnimated;
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mIsBaseSet = aLength.mIsBaseSet;
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return *this;
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}
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nsresult SetBaseValueString(const nsAString& aValue,
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nsSVGElement *aSVGElement,
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bool aDoSetAttr);
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void GetBaseValueString(nsAString& aValue) const;
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void GetAnimValueString(nsAString& aValue) const;
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float GetBaseValue(nsSVGElement* aSVGElement) const
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{ return mBaseVal / GetUnitScaleFactor(aSVGElement, mSpecifiedUnitType); }
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float GetAnimValue(nsSVGElement* aSVGElement) const
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{ return mAnimVal / GetUnitScaleFactor(aSVGElement, mSpecifiedUnitType); }
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float GetAnimValue(nsIFrame* aFrame) const
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{ return mAnimVal / GetUnitScaleFactor(aFrame, mSpecifiedUnitType); }
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float GetAnimValue(mozilla::dom::SVGSVGElement* aCtx) const
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{ return mAnimVal / GetUnitScaleFactor(aCtx, mSpecifiedUnitType); }
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float GetAnimValue(const UserSpaceMetrics& aMetrics) const
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{ return mAnimVal / GetUnitScaleFactor(aMetrics, mSpecifiedUnitType); }
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uint8_t GetCtxType() const { return mCtxType; }
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uint8_t GetSpecifiedUnitType() const { return mSpecifiedUnitType; }
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bool IsPercentage() const
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{ return mSpecifiedUnitType == nsIDOMSVGLength::SVG_LENGTHTYPE_PERCENTAGE; }
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float GetAnimValInSpecifiedUnits() const { return mAnimVal; }
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float GetBaseValInSpecifiedUnits() const { return mBaseVal; }
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float GetBaseValue(mozilla::dom::SVGSVGElement* aCtx) const
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{ return mBaseVal / GetUnitScaleFactor(aCtx, mSpecifiedUnitType); }
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bool HasBaseVal() const {
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return mIsBaseSet;
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}
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// Returns true if the animated value of this length has been explicitly
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// set (either by animation, or by taking on the base value which has been
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// explicitly set by markup or a DOM call), false otherwise.
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// If this returns false, the animated value is still valid, that is,
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// useable, and represents the default base value of the attribute.
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bool IsExplicitlySet() const
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{ return mIsAnimated || mIsBaseSet; }
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already_AddRefed<mozilla::dom::SVGAnimatedLength>
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ToDOMAnimatedLength(nsSVGElement* aSVGElement);
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// Returns a new nsISMILAttr object that the caller must delete
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nsISMILAttr* ToSMILAttr(nsSVGElement* aSVGElement);
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private:
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float mAnimVal;
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float mBaseVal;
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uint8_t mSpecifiedUnitType;
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uint8_t mAttrEnum; // element specified tracking for attribute
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uint8_t mCtxType; // X, Y or Unspecified
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bool mIsAnimated:1;
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bool mIsBaseSet:1;
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float GetUnitScaleFactor(nsIFrame *aFrame, uint8_t aUnitType) const;
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float GetUnitScaleFactor(const UserSpaceMetrics& aMetrics, uint8_t aUnitType) const;
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float GetUnitScaleFactor(nsSVGElement *aSVGElement, uint8_t aUnitType) const;
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float GetUnitScaleFactor(mozilla::dom::SVGSVGElement *aCtx, uint8_t aUnitType) const;
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// SetBaseValue and SetAnimValue set the value in user units
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void SetBaseValue(float aValue, nsSVGElement *aSVGElement, bool aDoSetAttr);
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void SetBaseValueInSpecifiedUnits(float aValue, nsSVGElement *aSVGElement,
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bool aDoSetAttr);
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void SetAnimValue(float aValue, nsSVGElement *aSVGElement);
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void SetAnimValueInSpecifiedUnits(float aValue, nsSVGElement *aSVGElement);
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nsresult NewValueSpecifiedUnits(uint16_t aUnitType, float aValue,
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nsSVGElement *aSVGElement);
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nsresult ConvertToSpecifiedUnits(uint16_t aUnitType, nsSVGElement *aSVGElement);
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nsresult ToDOMBaseVal(mozilla::DOMSVGLength **aResult, nsSVGElement* aSVGElement);
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nsresult ToDOMAnimVal(mozilla::DOMSVGLength **aResult, nsSVGElement* aSVGElement);
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public:
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struct SMILLength : public nsISMILAttr
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{
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public:
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SMILLength(nsSVGLength2* aVal, nsSVGElement *aSVGElement)
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: mVal(aVal), mSVGElement(aSVGElement) {}
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// These will stay alive because a nsISMILAttr only lives as long
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// as the Compositing step, and DOM elements don't get a chance to
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// die during that.
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nsSVGLength2* mVal;
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nsSVGElement* mSVGElement;
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// nsISMILAttr methods
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virtual nsresult ValueFromString(const nsAString& aStr,
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const mozilla::dom::SVGAnimationElement* aSrcElement,
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nsSMILValue &aValue,
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bool& aPreventCachingOfSandwich) const override;
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virtual nsSMILValue GetBaseValue() const override;
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virtual void ClearAnimValue() override;
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virtual nsresult SetAnimValue(const nsSMILValue& aValue) override;
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};
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};
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#endif // __NS_SVGLENGTH2_H__
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