MiscContainer*
nsAttrValue::ClearMiscContainer()
{
MiscContainer* cont = nullptr;
if (BaseType() == eOtherBase) {
cont = GetMiscContainer();
if (cont->IsRefCounted() && cont->mValue.mRefCount > 1) {
// This MiscContainer is shared, we need a new one.
NS_RELEASE(cont);
cont = new MiscContainer;
SetPtrValueAndType(cont, eOtherBase);
}
else {
switch (cont->mType) {
case eCSSStyleRule:
{
MOZ_ASSERT(cont->mValue.mRefCount == 1);
cont->Release();
cont->Evict();
NS_RELEASE(cont->mValue.mCSSStyleRule);
break;
}
case eURL:
{
NS_RELEASE(cont->mValue.mURL);
break;
}
case eImage:
{
NS_RELEASE(cont->mValue.mImage);
break;
}
case eAtomArray:
{
delete cont->mValue.mAtomArray;
break;
}
case eIntMarginValue:
{
delete cont->mValue.mIntMargin;
break;
}
default:
{
break;
}
}
}
ResetMiscAtomOrString();
}
else {
ResetIfSet();
}
return cont;
}
size_t
nsAttrValue::SizeOfExcludingThis(MallocSizeOf aMallocSizeOf) const
{
size_t n = 0;
switch (BaseType()) {
case eStringBase:
{
nsStringBuffer* str = static_cast<nsStringBuffer*>(GetPtr());
n += str ? str->SizeOfIncludingThisIfUnshared(aMallocSizeOf) : 0;
break;
}
case eOtherBase:
{
MiscContainer* container = GetMiscContainer();
if (!container) {
break;
}
if (container->IsRefCounted() && container->mValue.mRefCount > 1) {
// We don't report this MiscContainer at all in order to avoid
// twice-reporting it.
// TODO DMD, bug 1027551 - figure out how to report this ref-counted
// object just once.
break;
}
n += aMallocSizeOf(container);
void* otherPtr = MISC_STR_PTR(container);
// We only count the size of the object pointed by otherPtr if it's a
// string. When it's an atom, it's counted separatly.
if (otherPtr &&
static_cast<ValueBaseType>(container->mStringBits & NS_ATTRVALUE_BASETYPE_MASK) == eStringBase) {
nsStringBuffer* str = static_cast<nsStringBuffer*>(otherPtr);
n += str ? str->SizeOfIncludingThisIfUnshared(aMallocSizeOf) : 0;
}
if (Type() == eCSSDeclaration && container->mValue.mCSSDeclaration) {
// TODO: mCSSDeclaration might be owned by another object which
// would make us count them twice, bug 677493.
// Bug 1281964: For ServoDeclarationBlock if we do measure we'll
// need a way to call the Servo heap_size_of function.
//n += container->mCSSDeclaration->SizeOfIncludingThis(aMallocSizeOf);
} else if (Type() == eAtomArray && container->mValue.mAtomArray) {
// Don't measure each nsIAtom, they are measured separatly.
n += container->mValue.mAtomArray->ShallowSizeOfIncludingThis(aMallocSizeOf);
}
break;
}
case eAtomBase: // Atoms are counted separately.
case eIntegerBase: // The value is in mBits, nothing to do.
break;
}
return n;
}
bool
nsAttrValue::ParseStyleAttribute(const nsAString& aString,
nsStyledElement* aElement)
{
nsIDocument* ownerDoc = aElement->OwnerDoc();
nsHTMLCSSStyleSheet* sheet = ownerDoc->GetInlineStyleSheet();
nsCOMPtr<nsIURI> baseURI = aElement->GetBaseURI();
nsIURI* docURI = ownerDoc->GetDocumentURI();
NS_ASSERTION(aElement->NodePrincipal() == ownerDoc->NodePrincipal(),
"This is unexpected");
// If the (immutable) document URI does not match the element's base URI
// (the common case is that they do match) do not cache the rule. This is
// because the results of the CSS parser are dependent on these URIs, and we
// do not want to have to account for the URIs in the hash lookup.
bool cachingAllowed = sheet && baseURI == docURI;
if (cachingAllowed) {
MiscContainer* cont = sheet->LookupStyleAttr(aString);
if (cont) {
// Set our MiscContainer to the cached one.
NS_ADDREF(cont);
SetPtrValueAndType(cont, eOtherBase);
return true;
}
}
RefPtr<DeclarationBlock> decl;
if (ownerDoc->GetStyleBackendType() == StyleBackendType::Servo) {
decl = ServoDeclarationBlock::FromCssText(aString);
} else {
css::Loader* cssLoader = ownerDoc->CSSLoader();
nsCSSParser cssParser(cssLoader);
decl = cssParser.ParseStyleAttribute(aString, docURI, baseURI,
aElement->NodePrincipal());
}
if (!decl) {
return false;
}
decl->SetHTMLCSSStyleSheet(sheet);
SetTo(decl.forget(), &aString);
if (cachingAllowed) {
MiscContainer* cont = GetMiscContainer();
cont->Cache();
}
return true;
}
void
nsAttrValue::Reset()
{
switch(BaseType()) {
case eStringBase:
{
nsStringBuffer* str = static_cast<nsStringBuffer*>(GetPtr());
if (str) {
str->Release();
}
break;
}
case eOtherBase:
{
MiscContainer* cont = GetMiscContainer();
if (cont->IsRefCounted() && cont->mValue.mRefCount > 1) {
NS_RELEASE(cont);
break;
}
delete ClearMiscContainer();
break;
}
case eAtomBase:
{
nsIAtom* atom = GetAtomValue();
NS_RELEASE(atom);
break;
}
case eIntegerBase:
{
break;
}
}
mBits = 0;
}
void
nsAttrValue::ToString(nsAString& aResult) const
{
MiscContainer* cont = nullptr;
if (BaseType() == eOtherBase) {
cont = GetMiscContainer();
if (cont->GetString(aResult)) {
return;
}
}
switch(Type()) {
case eString:
{
nsStringBuffer* str = static_cast<nsStringBuffer*>(GetPtr());
if (str) {
str->ToString(str->StorageSize()/sizeof(char16_t) - 1, aResult);
}
else {
aResult.Truncate();
}
break;
}
case eAtom:
{
nsIAtom *atom = static_cast<nsIAtom*>(GetPtr());
atom->ToString(aResult);
break;
}
case eInteger:
{
nsAutoString intStr;
intStr.AppendInt(GetIntegerValue());
aResult = intStr;
break;
}
#ifdef DEBUG
case eColor:
{
NS_NOTREACHED("color attribute without string data");
aResult.Truncate();
break;
}
#endif
case eEnum:
{
GetEnumString(aResult, false);
break;
}
case ePercent:
{
nsAutoString intStr;
intStr.AppendInt(cont ? cont->mValue.mPercent : GetIntInternal());
aResult = intStr + NS_LITERAL_STRING("%");
break;
}
case eCSSStyleRule:
{
aResult.Truncate();
MiscContainer *container = GetMiscContainer();
css::Declaration *decl =
container->mValue.mCSSStyleRule->GetDeclaration();
if (decl) {
decl->ToString(aResult);
}
const_cast<nsAttrValue*>(this)->SetMiscAtomOrString(&aResult);
break;
}
case eDoubleValue:
{
aResult.Truncate();
aResult.AppendFloat(GetDoubleValue());
break;
}
case eSVGAngle:
{
SVGAttrValueWrapper::ToString(GetMiscContainer()->mValue.mSVGAngle,
aResult);
break;
}
case eSVGIntegerPair:
{
SVGAttrValueWrapper::ToString(GetMiscContainer()->mValue.mSVGIntegerPair,
aResult);
break;
}
case eSVGLength:
{
SVGAttrValueWrapper::ToString(GetMiscContainer()->mValue.mSVGLength,
aResult);
break;
}
case eSVGLengthList:
{
SVGAttrValueWrapper::ToString(GetMiscContainer()->mValue.mSVGLengthList,
aResult);
break;
}
case eSVGNumberList:
{
SVGAttrValueWrapper::ToString(GetMiscContainer()->mValue.mSVGNumberList,
aResult);
break;
}
case eSVGNumberPair:
{
SVGAttrValueWrapper::ToString(GetMiscContainer()->mValue.mSVGNumberPair,
aResult);
break;
}
case eSVGPathData:
{
SVGAttrValueWrapper::ToString(GetMiscContainer()->mValue.mSVGPathData,
aResult);
break;
}
case eSVGPointList:
{
SVGAttrValueWrapper::ToString(GetMiscContainer()->mValue.mSVGPointList,
aResult);
break;
}
case eSVGPreserveAspectRatio:
{
SVGAttrValueWrapper::ToString(GetMiscContainer()->mValue.mSVGPreserveAspectRatio,
aResult);
break;
}
case eSVGStringList:
{
SVGAttrValueWrapper::ToString(GetMiscContainer()->mValue.mSVGStringList,
aResult);
break;
}
case eSVGTransformList:
{
SVGAttrValueWrapper::ToString(GetMiscContainer()->mValue.mSVGTransformList,
aResult);
break;
}
case eSVGViewBox:
{
SVGAttrValueWrapper::ToString(GetMiscContainer()->mValue.mSVGViewBox,
aResult);
break;
}
default:
{
aResult.Truncate();
break;
}
}
}
void
nsAttrValue::SetTo(const nsAttrValue& aOther)
{
if (this == &aOther) {
return;
}
switch (aOther.BaseType()) {
case eStringBase:
{
ResetIfSet();
nsStringBuffer* str = static_cast<nsStringBuffer*>(aOther.GetPtr());
if (str) {
str->AddRef();
SetPtrValueAndType(str, eStringBase);
}
return;
}
case eOtherBase:
{
break;
}
case eAtomBase:
{
ResetIfSet();
nsIAtom* atom = aOther.GetAtomValue();
NS_ADDREF(atom);
SetPtrValueAndType(atom, eAtomBase);
return;
}
case eIntegerBase:
{
ResetIfSet();
mBits = aOther.mBits;
return;
}
}
MiscContainer* otherCont = aOther.GetMiscContainer();
if (otherCont->IsRefCounted()) {
delete ClearMiscContainer();
NS_ADDREF(otherCont);
SetPtrValueAndType(otherCont, eOtherBase);
return;
}
MiscContainer* cont = EnsureEmptyMiscContainer();
switch (otherCont->mType) {
case eInteger:
{
cont->mValue.mInteger = otherCont->mValue.mInteger;
break;
}
case eEnum:
{
cont->mValue.mEnumValue = otherCont->mValue.mEnumValue;
break;
}
case ePercent:
{
cont->mValue.mPercent = otherCont->mValue.mPercent;
break;
}
case eColor:
{
cont->mValue.mColor = otherCont->mValue.mColor;
break;
}
case eCSSStyleRule:
{
MOZ_CRASH("These should be refcounted!");
}
case eURL:
{
NS_ADDREF(cont->mValue.mURL = otherCont->mValue.mURL);
break;
}
case eImage:
{
NS_ADDREF(cont->mValue.mImage = otherCont->mValue.mImage);
break;
}
case eAtomArray:
{
if (!EnsureEmptyAtomArray() ||
!GetAtomArrayValue()->AppendElements(*otherCont->mValue.mAtomArray)) {
Reset();
return;
}
break;
}
case eDoubleValue:
{
cont->mDoubleValue = otherCont->mDoubleValue;
break;
}
case eIntMarginValue:
{
if (otherCont->mValue.mIntMargin)
cont->mValue.mIntMargin =
new nsIntMargin(*otherCont->mValue.mIntMargin);
break;
}
default:
{
if (IsSVGType(otherCont->mType)) {
// All SVG types are just pointers to classes and will therefore have
// the same size so it doesn't really matter which one we assign
cont->mValue.mSVGAngle = otherCont->mValue.mSVGAngle;
} else {
NS_NOTREACHED("unknown type stored in MiscContainer");
}
break;
}
}
void* otherPtr = MISC_STR_PTR(otherCont);
if (otherPtr) {
if (static_cast<ValueBaseType>(otherCont->mStringBits & NS_ATTRVALUE_BASETYPE_MASK) ==
eStringBase) {
static_cast<nsStringBuffer*>(otherPtr)->AddRef();
} else {
static_cast<nsIAtom*>(otherPtr)->AddRef();
}
cont->mStringBits = otherCont->mStringBits;
}
// Note, set mType after switch-case, otherwise EnsureEmptyAtomArray doesn't
// work correctly.
cont->mType = otherCont->mType;
}
void
nsAttrValue::ToString(nsAString& aResult) const
{
MiscContainer* cont = nullptr;
if (BaseType() == eOtherBase) {
cont = GetMiscContainer();
if (cont->GetString(aResult)) {
return;
}
}
switch(Type()) {
case eString:
{
nsStringBuffer* str = static_cast<nsStringBuffer*>(GetPtr());
if (str) {
str->ToString(str->StorageSize()/sizeof(char16_t) - 1, aResult);
}
else {
aResult.Truncate();
}
break;
}
case eAtom:
{
nsIAtom *atom = static_cast<nsIAtom*>(GetPtr());
atom->ToString(aResult);
break;
}
case eInteger:
{
nsAutoString intStr;
intStr.AppendInt(GetIntegerValue());
aResult = intStr;
break;
}
#ifdef DEBUG
case eColor:
{
NS_NOTREACHED("color attribute without string data");
aResult.Truncate();
break;
}
#endif
case eEnum:
{
GetEnumString(aResult, false);
break;
}
case ePercent:
{
nsAutoString intStr;
intStr.AppendInt(cont ? cont->mValue.mPercent : GetIntInternal());
aResult = intStr + NS_LITERAL_STRING("%");
break;
}
case eCSSDeclaration:
{
aResult.Truncate();
MiscContainer *container = GetMiscContainer();
if (DeclarationBlock* decl = container->mValue.mCSSDeclaration) {
decl->ToString(aResult);
}
// We can reach this during parallel style traversal. If that happens,
// don't cache the string. The TLS overhead should't hurt us here, since
// main thread consumers will subsequently use the cache, and
// off-main-thread consumers only reach this in the rare case of selector
// matching on the "style" attribute.
if (!ServoStyleSet::IsInServoTraversal()) {
const_cast<nsAttrValue*>(this)->SetMiscAtomOrString(&aResult);
}
break;
}
case eDoubleValue:
{
aResult.Truncate();
aResult.AppendFloat(GetDoubleValue());
break;
}
case eSVGAngle:
{
SVGAttrValueWrapper::ToString(GetMiscContainer()->mValue.mSVGAngle,
aResult);
break;
}
case eSVGIntegerPair:
{
SVGAttrValueWrapper::ToString(GetMiscContainer()->mValue.mSVGIntegerPair,
aResult);
break;
}
case eSVGLength:
{
SVGAttrValueWrapper::ToString(GetMiscContainer()->mValue.mSVGLength,
aResult);
break;
}
case eSVGLengthList:
{
SVGAttrValueWrapper::ToString(GetMiscContainer()->mValue.mSVGLengthList,
aResult);
break;
}
case eSVGNumberList:
{
SVGAttrValueWrapper::ToString(GetMiscContainer()->mValue.mSVGNumberList,
aResult);
break;
}
case eSVGNumberPair:
{
SVGAttrValueWrapper::ToString(GetMiscContainer()->mValue.mSVGNumberPair,
aResult);
break;
}
case eSVGPathData:
{
SVGAttrValueWrapper::ToString(GetMiscContainer()->mValue.mSVGPathData,
aResult);
break;
}
case eSVGPointList:
{
SVGAttrValueWrapper::ToString(GetMiscContainer()->mValue.mSVGPointList,
aResult);
break;
}
case eSVGPreserveAspectRatio:
{
SVGAttrValueWrapper::ToString(GetMiscContainer()->mValue.mSVGPreserveAspectRatio,
aResult);
break;
}
case eSVGStringList:
{
SVGAttrValueWrapper::ToString(GetMiscContainer()->mValue.mSVGStringList,
aResult);
break;
}
case eSVGTransformList:
{
SVGAttrValueWrapper::ToString(GetMiscContainer()->mValue.mSVGTransformList,
aResult);
break;
}
case eSVGViewBox:
{
SVGAttrValueWrapper::ToString(GetMiscContainer()->mValue.mSVGViewBox,
aResult);
break;
}
default:
{
aResult.Truncate();
break;
}
}
}
