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gecko-dev/dom/svg/SVGElement.h

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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 DOM_SVG_SVGELEMENT_H_
#define DOM_SVG_SVGELEMENT_H_
/*
SVGElement is the base class for all SVG content elements.
It implements all the common DOM interfaces and handles attributes.
*/
#include "mozilla/Attributes.h"
#include "mozilla/RefPtr.h"
#include "mozilla/SVGAnimatedClass.h"
#include "mozilla/SVGContentUtils.h"
#include "mozilla/dom/DOMRect.h"
#include "mozilla/dom/Element.h"
#include "mozilla/gfx/MatrixFwd.h"
#include "mozilla/UniquePtr.h"
#include "nsCSSPropertyID.h"
#include "nsChangeHint.h"
#include "nsCycleCollectionParticipant.h"
#include "nsError.h"
#include "nsISupportsImpl.h"
#include "nsStyledElement.h"
#include "gfxMatrix.h"
// {70db954d-e452-4be3-83aa-f54a51cf7890}
#define MOZILLA_SVGELEMENT_IID \
{ \
0x70db954d, 0xe452, 0x4be3, { \
0x82, 0xaa, 0xf5, 0x4a, 0x51, 0xcf, 0x78, 0x90 \
} \
}
nsresult NS_NewSVGElement(mozilla::dom::Element** aResult,
already_AddRefed<mozilla::dom::NodeInfo>&& aNodeInfo);
class mozAutoDocUpdate;
namespace mozilla {
class SVGAnimatedBoolean;
class SVGAnimatedEnumeration;
class SVGAnimatedInteger;
class SVGAnimatedIntegerPair;
class SVGAnimatedLength;
class SVGAnimatedLengthList;
class SVGAnimatedNumber;
class SVGAnimatedNumberList;
class SVGAnimatedNumberPair;
class SVGAnimatedOrient;
class SVGAnimatedPathSegList;
class SVGAnimatedPointList;
class SVGAnimatedString;
class SVGAnimatedPreserveAspectRatio;
class SVGAnimatedTransformList;
class SVGAnimatedViewBox;
class SVGNumberList;
class SVGStringList;
class SVGUserUnitList;
struct SVGEnumMapping;
namespace dom {
class DOMSVGStringList;
class SVGSVGElement;
class SVGViewportElement;
using SVGElementBase = nsStyledElement;
class SVGElement : public SVGElementBase // nsIContent
{
protected:
explicit SVGElement(already_AddRefed<mozilla::dom::NodeInfo>&& aNodeInfo);
friend nsresult(
::NS_NewSVGElement(mozilla::dom::Element** aResult,
already_AddRefed<mozilla::dom::NodeInfo>&& aNodeInfo));
nsresult Init();
virtual ~SVGElement();
public:
nsresult Clone(mozilla::dom::NodeInfo*,
nsINode** aResult) const MOZ_MUST_OVERRIDE override;
// From Element
nsresult CopyInnerTo(mozilla::dom::Element* aDest);
NS_DECLARE_STATIC_IID_ACCESSOR(MOZILLA_SVGELEMENT_IID)
// nsISupports
NS_INLINE_DECL_REFCOUNTING_INHERITED(SVGElement, SVGElementBase)
NS_DECL_ADDSIZEOFEXCLUDINGTHIS
NS_IMETHOD QueryInterface(REFNSIID aIID, void** aInstancePtr) override;
void DidAnimateClass();
void SetNonce(const nsAString& aNonce) {
SetProperty(nsGkAtoms::nonce, new nsString(aNonce),
nsINode::DeleteProperty<nsString>, /* aTransfer = */ true);
}
void RemoveNonce() { RemoveProperty(nsGkAtoms::nonce); }
void GetNonce(nsAString& aNonce) const {
nsString* cspNonce = static_cast<nsString*>(GetProperty(nsGkAtoms::nonce));
if (cspNonce) {
aNonce = *cspNonce;
}
}
// nsIContent interface methods
nsresult BindToTree(BindContext&, nsINode& aParent) override;
nsChangeHint GetAttributeChangeHint(const nsAtom* aAttribute,
int32_t aModType) const override;
/**
* We override the default to unschedule computation of Servo declaration
* blocks when adopted across documents.
*/
void NodeInfoChanged(Document* aOldDoc) override;
NS_IMETHOD_(bool) IsAttributeMapped(const nsAtom* aAttribute) const override;
void UpdateMappedDeclarationBlock();
NS_IMPL_FROMNODE(SVGElement, kNameSpaceID_SVG)
// Gets the element that establishes the rectangular viewport against which
// we should resolve percentage lengths (our "coordinate context"). Returns
// nullptr for outer <svg> or SVG without an <svg> parent (invalid SVG).
mozilla::dom::SVGViewportElement* GetCtx() const;
/**
* Returns aMatrix pre-multiplied by (explicit or implicit) transforms that
* are introduced by attributes on this element.
*
* If aWhich is eAllTransforms, then all the transforms from the coordinate
* space established by this element for its children to the coordinate
* space established by this element's parent element for this element, are
* included.
*
* If aWhich is eUserSpaceToParent, then only the transforms from this
* element's userspace to the coordinate space established by its parent is
* included. This includes any transforms introduced by the 'transform'
* attribute, transform animations and animateMotion, but not any offsets
* due to e.g. 'x'/'y' attributes, or any transform due to a 'viewBox'
* attribute. (SVG userspace is defined to be the coordinate space in which
* coordinates on an element apply.)
*
* If aWhich is eChildToUserSpace, then only the transforms from the
* coordinate space established by this element for its childre to this
* elements userspace are included. This includes any offsets due to e.g.
* 'x'/'y' attributes, and any transform due to a 'viewBox' attribute, but
* does not include any transforms due to the 'transform' attribute.
*/
virtual gfxMatrix PrependLocalTransformsTo(
const gfxMatrix& aMatrix,
SVGTransformTypes aWhich = eAllTransforms) const;
// Setter for to set the current <animateMotion> transformation
// Only visible for SVGGraphicElement, so it's a no-op here, and that
// subclass has the useful implementation.
virtual void SetAnimateMotionTransform(
const mozilla::gfx::Matrix* aMatrix) { /*no-op*/
}
virtual const mozilla::gfx::Matrix* GetAnimateMotionTransform() const {
return nullptr;
}
bool IsStringAnimatable(uint8_t aAttrEnum) {
return GetStringInfo().mInfos[aAttrEnum].mIsAnimatable;
}
bool NumberAttrAllowsPercentage(uint8_t aAttrEnum) {
return IsSVGElement(nsGkAtoms::stop) &&
GetNumberInfo().mInfos[aAttrEnum].mName == nsGkAtoms::offset;
}
virtual bool HasValidDimensions() const { return true; }
void SetLength(nsAtom* aName, const SVGAnimatedLength& aLength);
enum class ValToUse { Base, Anim };
static bool UpdateDeclarationBlockFromLength(
StyleLockedDeclarationBlock& aBlock, nsCSSPropertyID aPropId,
const SVGAnimatedLength& aLength, ValToUse aValToUse);
static bool UpdateDeclarationBlockFromPath(
StyleLockedDeclarationBlock& aBlock, const SVGAnimatedPathSegList& aPath,
ValToUse aValToUse);
nsAttrValue WillChangeLength(uint8_t aAttrEnum,
const mozAutoDocUpdate& aProofOfUpdate);
nsAttrValue WillChangeNumberPair(uint8_t aAttrEnum);
nsAttrValue WillChangeIntegerPair(uint8_t aAttrEnum,
const mozAutoDocUpdate& aProofOfUpdate);
nsAttrValue WillChangeOrient(const mozAutoDocUpdate& aProofOfUpdate);
nsAttrValue WillChangeViewBox(const mozAutoDocUpdate& aProofOfUpdate);
nsAttrValue WillChangePreserveAspectRatio(
const mozAutoDocUpdate& aProofOfUpdate);
nsAttrValue WillChangeNumberList(uint8_t aAttrEnum,
const mozAutoDocUpdate& aProofOfUpdate);
nsAttrValue WillChangeLengthList(uint8_t aAttrEnum,
const mozAutoDocUpdate& aProofOfUpdate);
nsAttrValue WillChangePointList(const mozAutoDocUpdate& aProofOfUpdate);
nsAttrValue WillChangePathSegList(const mozAutoDocUpdate& aProofOfUpdate);
nsAttrValue WillChangeTransformList(const mozAutoDocUpdate& aProofOfUpdate);
nsAttrValue WillChangeStringList(bool aIsConditionalProcessingAttribute,
uint8_t aAttrEnum,
const mozAutoDocUpdate& aProofOfUpdate);
void DidChangeLength(uint8_t aAttrEnum, const nsAttrValue& aEmptyOrOldValue,
const mozAutoDocUpdate& aProofOfUpdate);
void DidChangeNumber(uint8_t aAttrEnum);
void DidChangeNumberPair(uint8_t aAttrEnum,
const nsAttrValue& aEmptyOrOldValue);
void DidChangeInteger(uint8_t aAttrEnum);
void DidChangeIntegerPair(uint8_t aAttrEnum,
const nsAttrValue& aEmptyOrOldValue,
const mozAutoDocUpdate& aProofOfUpdate);
void DidChangeBoolean(uint8_t aAttrEnum);
void DidChangeEnum(uint8_t aAttrEnum);
void DidChangeOrient(const nsAttrValue& aEmptyOrOldValue,
const mozAutoDocUpdate& aProofOfUpdate);
void DidChangeViewBox(const nsAttrValue& aEmptyOrOldValue,
const mozAutoDocUpdate& aProofOfUpdate);
void DidChangePreserveAspectRatio(const nsAttrValue& aEmptyOrOldValue,
const mozAutoDocUpdate& aProofOfUpdate);
void DidChangeNumberList(uint8_t aAttrEnum,
const nsAttrValue& aEmptyOrOldValue,
const mozAutoDocUpdate& aProofOfUpdate);
void DidChangeLengthList(uint8_t aAttrEnum,
const nsAttrValue& aEmptyOrOldValue,
const mozAutoDocUpdate& aProofOfUpdate);
void DidChangePointList(const nsAttrValue& aEmptyOrOldValue,
const mozAutoDocUpdate& aProofOfUpdate);
void DidChangePathSegList(const nsAttrValue& aEmptyOrOldValue,
const mozAutoDocUpdate& aProofOfUpdate);
void DidChangeTransformList(const nsAttrValue& aEmptyOrOldValue,
const mozAutoDocUpdate& aProofOfUpdate);
void DidChangeString(uint8_t aAttrEnum) {}
void DidChangeStringList(bool aIsConditionalProcessingAttribute,
uint8_t aAttrEnum,
const nsAttrValue& aEmptyOrOldValue,
const mozAutoDocUpdate& aProofOfUpdate);
void DidAnimateLength(uint8_t aAttrEnum);
void DidAnimateNumber(uint8_t aAttrEnum) {
auto info = GetNumberInfo();
DidAnimateAttribute(kNameSpaceID_None, info.mInfos[aAttrEnum].mName);
}
void DidAnimateNumberPair(uint8_t aAttrEnum) {
auto info = GetNumberPairInfo();
DidAnimateAttribute(kNameSpaceID_None, info.mInfos[aAttrEnum].mName);
}
void DidAnimateInteger(uint8_t aAttrEnum) {
auto info = GetIntegerInfo();
DidAnimateAttribute(kNameSpaceID_None, info.mInfos[aAttrEnum].mName);
}
void DidAnimateIntegerPair(uint8_t aAttrEnum) {
auto info = GetIntegerPairInfo();
DidAnimateAttribute(kNameSpaceID_None, info.mInfos[aAttrEnum].mName);
}
void DidAnimateBoolean(uint8_t aAttrEnum) {
auto info = GetBooleanInfo();
DidAnimateAttribute(kNameSpaceID_None, info.mInfos[aAttrEnum].mName);
}
void DidAnimateEnum(uint8_t aAttrEnum) {
auto info = GetEnumInfo();
DidAnimateAttribute(kNameSpaceID_None, info.mInfos[aAttrEnum].mName);
}
void DidAnimateOrient() {
DidAnimateAttribute(kNameSpaceID_None, nsGkAtoms::orient);
}
void DidAnimateViewBox() {
DidAnimateAttribute(kNameSpaceID_None, nsGkAtoms::viewBox);
}
void DidAnimatePreserveAspectRatio() {
DidAnimateAttribute(kNameSpaceID_None, nsGkAtoms::preserveAspectRatio);
}
void DidAnimateNumberList(uint8_t aAttrEnum) {
auto info = GetNumberListInfo();
DidAnimateAttribute(kNameSpaceID_None, info.mInfos[aAttrEnum].mName);
}
void DidAnimateLengthList(uint8_t aAttrEnum) {
auto info = GetLengthListInfo();
DidAnimateAttribute(kNameSpaceID_None, info.mInfos[aAttrEnum].mName);
}
void DidAnimatePointList();
void DidAnimatePathSegList();
void DidAnimateTransformList(int32_t aModType);
void DidAnimateString(uint8_t aAttrEnum) {
auto info = GetStringInfo();
DidAnimateAttribute(info.mInfos[aAttrEnum].mNamespaceID,
info.mInfos[aAttrEnum].mName);
}
enum {
/**
* Flag to indicate to GetAnimatedXxx() methods that the object being
* requested should be allocated if it hasn't already been allocated, and
* that the method should not return null. Only applicable to methods that
* need to allocate the object that they return.
*/
DO_ALLOCATE = 0x1
};
SVGAnimatedLength* GetAnimatedLength(uint8_t aAttrEnum);
SVGAnimatedLength* GetAnimatedLength(const nsAtom* aAttrName);
void GetAnimatedLengthValues(float* aFirst, ...);
void GetAnimatedNumberValues(float* aFirst, ...);
void GetAnimatedIntegerValues(int32_t* aFirst, ...);
SVGAnimatedNumberList* GetAnimatedNumberList(uint8_t aAttrEnum);
SVGAnimatedNumberList* GetAnimatedNumberList(nsAtom* aAttrName);
void GetAnimatedLengthListValues(SVGUserUnitList* aFirst, ...);
SVGAnimatedLengthList* GetAnimatedLengthList(uint8_t aAttrEnum);
virtual SVGAnimatedPointList* GetAnimatedPointList() { return nullptr; }
virtual SVGAnimatedPathSegList* GetAnimPathSegList() {
// DOM interface 'SVGAnimatedPathData' (*inherited* by SVGPathElement)
// has a member called 'animatedPathSegList' member, so we have a shorter
// name so we don't get hidden by the GetAnimatedPathSegList declared by
// NS_DECL_NSIDOMSVGANIMATEDPATHDATA.
return nullptr;
}
/**
* Get the SVGAnimatedTransformList for this element.
*
* Despite the fact that animated transform lists are used for a variety of
* attributes, no SVG element uses more than one.
*
* It's relatively uncommon for elements to have their transform attribute
* set, so to save memory the SVGAnimatedTransformList is not allocated
* until the attribute is set/animated or its DOM wrapper is created. Callers
* that require the SVGAnimatedTransformList to be allocated and for this
* method to return non-null must pass the DO_ALLOCATE flag.
*/
virtual SVGAnimatedTransformList* GetAnimatedTransformList(
uint32_t aFlags = 0) {
return nullptr;
}
mozilla::UniquePtr<SMILAttr> GetAnimatedAttr(int32_t aNamespaceID,
nsAtom* aName) override;
void AnimationNeedsResample();
void FlushAnimations();
void GetStringBaseValue(uint8_t aAttrEnum, nsAString& aResult) const;
void SetStringBaseValue(uint8_t aAttrEnum, const nsAString& aValue);
virtual nsStaticAtom* GetPointListAttrName() const { return nullptr; }
virtual nsStaticAtom* GetPathDataAttrName() const { return nullptr; }
virtual nsStaticAtom* GetTransformListAttrName() const { return nullptr; }
const nsAttrValue* GetAnimatedClassName() const {
if (!mClassAttribute.IsAnimated()) {
return nullptr;
}
return mClassAnimAttr.get();
}
virtual void ClearAnyCachedPath() {}
virtual bool IsTransformable() { return false; }
// WebIDL
mozilla::dom::SVGSVGElement* GetOwnerSVGElement();
SVGElement* GetViewportElement();
already_AddRefed<mozilla::dom::DOMSVGAnimatedString> ClassName();
bool Autofocus() const { return GetBoolAttr(nsGkAtoms::autofocus); }
void SetAutofocus(bool aAutofocus, ErrorResult& aRv) {
if (aAutofocus) {
SetAttr(nsGkAtoms::autofocus, u""_ns, aRv);
} else {
UnsetAttr(nsGkAtoms::autofocus, aRv);
}
}
protected:
JSObject* WrapNode(JSContext* cx, JS::Handle<JSObject*> aGivenProto) override;
// We define BeforeSetAttr here and mark it final to ensure it is NOT used
// by SVG elements.
// This is because we're not currently passing the correct value for aValue to
// BeforeSetAttr since it would involve allocating extra SVG value types.
// See the comment in SVGElement::WillChangeValue.
void BeforeSetAttr(int32_t aNamespaceID, nsAtom* aName,
const nsAttrValue* aValue, bool aNotify) final;
void AfterSetAttr(int32_t aNamespaceID, nsAtom* aName,
const nsAttrValue* aValue, const nsAttrValue* aOldValue,
nsIPrincipal* aSubjectPrincipal, bool aNotify) override;
bool ParseAttribute(int32_t aNamespaceID, nsAtom* aAttribute,
const nsAString& aValue,
nsIPrincipal* aMaybeScriptedPrincipal,
nsAttrValue& aResult) override;
static nsresult ReportAttributeParseFailure(Document* aDocument,
nsAtom* aAttribute,
const nsAString& aValue);
nsAttrValue WillChangeValue(nsAtom* aName,
const mozAutoDocUpdate& aProofOfUpdate);
// aNewValue is set to the old value. This value may be invalid if
// !StoresOwnData.
void DidChangeValue(nsAtom* aName, const nsAttrValue& aEmptyOrOldValue,
nsAttrValue& aNewValue,
const mozAutoDocUpdate& aProofOfUpdate);
void MaybeSerializeAttrBeforeRemoval(nsAtom* aName, bool aNotify);
nsAtom* GetEventNameForAttr(nsAtom* aAttr) override;
struct LengthInfo {
nsStaticAtom* const mName;
const float mDefaultValue;
const uint8_t mDefaultUnitType;
const uint8_t mCtxType;
};
template <typename Value, typename InfoValue>
struct AttributesInfo {
Value* const mValues;
const InfoValue* const mInfos;
const uint32_t mCount;
AttributesInfo(Value* aValues, const InfoValue* aInfos, uint32_t aCount)
: mValues(aValues), mInfos(aInfos), mCount(aCount) {}
void CopyAllFrom(const AttributesInfo&);
void ResetAll();
void Reset(uint8_t aEnum);
};
using LengthAttributesInfo = AttributesInfo<SVGAnimatedLength, LengthInfo>;
struct NumberInfo {
nsStaticAtom* const mName;
const float mDefaultValue;
};
using NumberAttributesInfo = AttributesInfo<SVGAnimatedNumber, NumberInfo>;
struct NumberPairInfo {
nsStaticAtom* const mName;
const float mDefaultValue1;
const float mDefaultValue2;
};
using NumberPairAttributesInfo =
AttributesInfo<SVGAnimatedNumberPair, NumberPairInfo>;
struct IntegerInfo {
nsStaticAtom* const mName;
const int32_t mDefaultValue;
};
using IntegerAttributesInfo = AttributesInfo<SVGAnimatedInteger, IntegerInfo>;
struct IntegerPairInfo {
nsStaticAtom* const mName;
const int32_t mDefaultValue1;
const int32_t mDefaultValue2;
};
using IntegerPairAttributesInfo =
AttributesInfo<SVGAnimatedIntegerPair, IntegerPairInfo>;
struct BooleanInfo {
nsStaticAtom* const mName;
const bool mDefaultValue;
};
using BooleanAttributesInfo = AttributesInfo<SVGAnimatedBoolean, BooleanInfo>;
friend class mozilla::SVGAnimatedEnumeration;
struct EnumInfo {
nsStaticAtom* const mName;
const SVGEnumMapping* const mMapping;
const uint16_t mDefaultValue;
};
using EnumAttributesInfo = AttributesInfo<SVGAnimatedEnumeration, EnumInfo>;
struct NumberListInfo {
nsStaticAtom* const mName;
};
using NumberListAttributesInfo =
AttributesInfo<SVGAnimatedNumberList, NumberListInfo>;
struct LengthListInfo {
nsStaticAtom* const mName;
const uint8_t mAxis;
/**
* Flag to indicate whether appending zeros to the end of the list would
* change the rendering of the SVG for the attribute in question. For x and
* y on the <text> element this is true, but for dx and dy on <text> this
* is false. This flag is fed down to SVGLengthListSMILType so it can
* determine if it can sensibly animate from-to lists of different lengths,
* which is desirable in the case of dx and dy.
*/
const bool mCouldZeroPadList;
};
using LengthListAttributesInfo =
AttributesInfo<SVGAnimatedLengthList, LengthListInfo>;
struct StringInfo {
nsStaticAtom* const mName;
const int32_t mNamespaceID;
const bool mIsAnimatable;
};
using StringAttributesInfo = AttributesInfo<SVGAnimatedString, StringInfo>;
friend class DOMSVGStringList;
struct StringListInfo {
nsStaticAtom* const mName;
};
using StringListAttributesInfo =
AttributesInfo<SVGStringList, StringListInfo>;
virtual LengthAttributesInfo GetLengthInfo();
virtual NumberAttributesInfo GetNumberInfo();
virtual NumberPairAttributesInfo GetNumberPairInfo();
virtual IntegerAttributesInfo GetIntegerInfo();
virtual IntegerPairAttributesInfo GetIntegerPairInfo();
virtual BooleanAttributesInfo GetBooleanInfo();
virtual EnumAttributesInfo GetEnumInfo();
// We assume all orients, viewboxes and preserveAspectRatios are alike
// so we don't need to wrap the class
virtual SVGAnimatedOrient* GetAnimatedOrient();
virtual SVGAnimatedPreserveAspectRatio* GetAnimatedPreserveAspectRatio();
virtual SVGAnimatedViewBox* GetAnimatedViewBox();
virtual NumberListAttributesInfo GetNumberListInfo();
virtual LengthListAttributesInfo GetLengthListInfo();
virtual StringAttributesInfo GetStringInfo();
virtual StringListAttributesInfo GetStringListInfo();
static SVGEnumMapping sSVGUnitTypesMap[];
virtual void DidAnimateAttribute(int32_t aNameSpaceID, nsAtom* aAttribute);
private:
void UnsetAttrInternal(int32_t aNameSpaceID, nsAtom* aName, bool aNotify);
SVGAnimatedClass mClassAttribute;
UniquePtr<nsAttrValue> mClassAnimAttr;
};
NS_DEFINE_STATIC_IID_ACCESSOR(SVGElement, MOZILLA_SVGELEMENT_IID)
/**
* A macro to implement the NS_NewSVGXXXElement() functions.
*/
#define NS_IMPL_NS_NEW_SVG_ELEMENT(_elementName) \
nsresult NS_NewSVG##_elementName##Element( \
nsIContent** aResult, \
already_AddRefed<mozilla::dom::NodeInfo>&& aNodeInfo) { \
RefPtr<mozilla::dom::NodeInfo> nodeInfo(aNodeInfo); \
auto* nim = nodeInfo->NodeInfoManager(); \
RefPtr<mozilla::dom::SVG##_elementName##Element> it = \
new (nim) mozilla::dom::SVG##_elementName##Element(nodeInfo.forget()); \
\
nsresult rv = it->Init(); \
\
if (NS_FAILED(rv)) { \
return rv; \
} \
\
it.forget(aResult); \
\
return rv; \
}
#define NS_IMPL_NS_NEW_SVG_ELEMENT_CHECK_PARSER(_elementName) \
nsresult NS_NewSVG##_elementName##Element( \
nsIContent** aResult, \
already_AddRefed<mozilla::dom::NodeInfo>&& aNodeInfo, \
mozilla::dom::FromParser aFromParser) { \
RefPtr<mozilla::dom::NodeInfo> nodeInfo(aNodeInfo); \
auto* nim = nodeInfo->NodeInfoManager(); \
RefPtr<mozilla::dom::SVG##_elementName##Element> it = \
new (nim) mozilla::dom::SVG##_elementName##Element(nodeInfo.forget(), \
aFromParser); \
\
nsresult rv = it->Init(); \
\
if (NS_FAILED(rv)) { \
return rv; \
} \
\
it.forget(aResult); \
\
return rv; \
}
// No unlinking, we'd need to null out the value pointer (the object it
// points to is held by the element) and null-check it everywhere.
#define NS_SVG_VAL_IMPL_CYCLE_COLLECTION(_val, _element) \
NS_IMPL_CYCLE_COLLECTION_CLASS(_val) \
NS_IMPL_CYCLE_COLLECTION_TRAVERSE_BEGIN(_val) \
NS_IMPL_CYCLE_COLLECTION_TRAVERSE(_element) \
NS_IMPL_CYCLE_COLLECTION_TRAVERSE_END \
NS_IMPL_CYCLE_COLLECTION_UNLINK_0(_val)
#define NS_SVG_VAL_IMPL_CYCLE_COLLECTION_WRAPPERCACHED(_val, _element) \
NS_IMPL_CYCLE_COLLECTION_CLASS(_val) \
NS_IMPL_CYCLE_COLLECTION_UNLINK_BEGIN(_val) \
NS_IMPL_CYCLE_COLLECTION_UNLINK_PRESERVED_WRAPPER \
NS_IMPL_CYCLE_COLLECTION_UNLINK_END \
NS_IMPL_CYCLE_COLLECTION_TRAVERSE_BEGIN(_val) \
NS_IMPL_CYCLE_COLLECTION_TRAVERSE(_element) \
NS_IMPL_CYCLE_COLLECTION_TRAVERSE_END \
NS_IMPL_CYCLE_COLLECTION_TRACE_BEGIN(_val) \
NS_IMPL_CYCLE_COLLECTION_TRACE_PRESERVED_WRAPPER \
NS_IMPL_CYCLE_COLLECTION_TRACE_END
} // namespace dom
} // namespace mozilla
#endif // DOM_SVG_SVGELEMENT_H_
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