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Mypal/layout/style/ServoBindings.cpp

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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/. */
#include "mozilla/ServoBindings.h"
#include "ChildIterator.h"
#include "StyleStructContext.h"
#include "gfxFontFamilyList.h"
#include "nsAttrValueInlines.h"
#include "nsCSSRuleProcessor.h"
#include "nsContentUtils.h"
#include "nsDOMTokenList.h"
#include "nsIContentInlines.h"
#include "nsIDOMNode.h"
#include "nsIDocument.h"
#include "nsIFrame.h"
#include "nsINode.h"
#include "nsIPrincipal.h"
#include "nsNameSpaceManager.h"
#include "nsRuleNode.h"
#include "nsString.h"
#include "nsStyleStruct.h"
#include "nsStyleUtil.h"
#include "nsTArray.h"
#include "mozilla/EventStates.h"
#include "mozilla/ServoElementSnapshot.h"
#include "mozilla/ServoRestyleManager.h"
#include "mozilla/StyleAnimationValue.h"
#include "mozilla/DeclarationBlockInlines.h"
#include "mozilla/dom/Element.h"
using namespace mozilla;
using namespace mozilla::dom;
#define IMPL_STRONG_REF_TYPE_FOR(type_) \
already_AddRefed<type_> \
type_##Strong::Consume() { \
RefPtr<type_> result; \
result.swap(mPtr); \
return result.forget(); \
}
IMPL_STRONG_REF_TYPE_FOR(ServoComputedValues)
IMPL_STRONG_REF_TYPE_FOR(RawServoStyleSheet)
IMPL_STRONG_REF_TYPE_FOR(RawServoDeclarationBlock)
#undef IMPL_STRONG_REF_TYPE_FOR
uint32_t
Gecko_ChildrenCount(RawGeckoNodeBorrowed aNode)
{
return aNode->GetChildCount();
}
bool
Gecko_NodeIsElement(RawGeckoNodeBorrowed aNode)
{
return aNode->IsElement();
}
RawGeckoNodeBorrowedOrNull
Gecko_GetParentNode(RawGeckoNodeBorrowed aNode)
{
return aNode->GetFlattenedTreeParentNode();
}
RawGeckoNodeBorrowedOrNull
Gecko_GetFirstChild(RawGeckoNodeBorrowed aNode)
{
return aNode->GetFirstChild();
}
RawGeckoNodeBorrowedOrNull
Gecko_GetLastChild(RawGeckoNodeBorrowed aNode)
{
return aNode->GetLastChild();
}
RawGeckoNodeBorrowedOrNull
Gecko_GetPrevSibling(RawGeckoNodeBorrowed aNode)
{
return aNode->GetPreviousSibling();
}
RawGeckoNodeBorrowedOrNull
Gecko_GetNextSibling(RawGeckoNodeBorrowed aNode)
{
return aNode->GetNextSibling();
}
RawGeckoElementBorrowedOrNull
Gecko_GetParentElement(RawGeckoElementBorrowed aElement)
{
nsINode* parentNode = aElement->GetFlattenedTreeParentNode();
return parentNode->IsElement() ? parentNode->AsElement() : nullptr;
}
RawGeckoElementBorrowedOrNull
Gecko_GetFirstChildElement(RawGeckoElementBorrowed aElement)
{
return aElement->GetFirstElementChild();
}
RawGeckoElementBorrowedOrNull Gecko_GetLastChildElement(RawGeckoElementBorrowed aElement)
{
return aElement->GetLastElementChild();
}
RawGeckoElementBorrowedOrNull
Gecko_GetPrevSiblingElement(RawGeckoElementBorrowed aElement)
{
return aElement->GetPreviousElementSibling();
}
RawGeckoElementBorrowedOrNull
Gecko_GetNextSiblingElement(RawGeckoElementBorrowed aElement)
{
return aElement->GetNextElementSibling();
}
RawGeckoElementBorrowedOrNull
Gecko_GetDocumentElement(RawGeckoDocumentBorrowed aDoc)
{
return aDoc->GetDocumentElement();
}
StyleChildrenIteratorOwnedOrNull
Gecko_MaybeCreateStyleChildrenIterator(RawGeckoNodeBorrowed aNode)
{
if (!aNode->IsElement()) {
return nullptr;
}
const Element* el = aNode->AsElement();
return StyleChildrenIterator::IsNeeded(el) ? new StyleChildrenIterator(el)
: nullptr;
}
void
Gecko_DropStyleChildrenIterator(StyleChildrenIteratorOwned aIterator)
{
MOZ_ASSERT(aIterator);
delete aIterator;
}
RawGeckoNodeBorrowed
Gecko_GetNextStyleChild(StyleChildrenIteratorBorrowedMut aIterator)
{
MOZ_ASSERT(aIterator);
return aIterator->GetNextChild();
}
EventStates::ServoType
Gecko_ElementState(RawGeckoElementBorrowed aElement)
{
return aElement->StyleState().ServoValue();
}
bool
Gecko_IsHTMLElementInHTMLDocument(RawGeckoElementBorrowed aElement)
{
return aElement->IsHTMLElement() && aElement->OwnerDoc()->IsHTMLDocument();
}
bool
Gecko_IsLink(RawGeckoElementBorrowed aElement)
{
return nsCSSRuleProcessor::IsLink(aElement);
}
bool
Gecko_IsTextNode(RawGeckoNodeBorrowed aNode)
{
return aNode->NodeInfo()->NodeType() == nsIDOMNode::TEXT_NODE;
}
bool
Gecko_IsVisitedLink(RawGeckoElementBorrowed aElement)
{
return aElement->StyleState().HasState(NS_EVENT_STATE_VISITED);
}
bool
Gecko_IsUnvisitedLink(RawGeckoElementBorrowed aElement)
{
return aElement->StyleState().HasState(NS_EVENT_STATE_UNVISITED);
}
bool
Gecko_IsRootElement(RawGeckoElementBorrowed aElement)
{
return aElement->OwnerDoc()->GetRootElement() == aElement;
}
nsIAtom*
Gecko_LocalName(RawGeckoElementBorrowed aElement)
{
return aElement->NodeInfo()->NameAtom();
}
nsIAtom*
Gecko_Namespace(RawGeckoElementBorrowed aElement)
{
int32_t id = aElement->NodeInfo()->NamespaceID();
return nsContentUtils::NameSpaceManager()->NameSpaceURIAtomForServo(id);
}
nsIAtom*
Gecko_GetElementId(RawGeckoElementBorrowed aElement)
{
const nsAttrValue* attr = aElement->GetParsedAttr(nsGkAtoms::id);
return attr ? attr->GetAtomValue() : nullptr;
}
// Dirtiness tracking.
uint32_t
Gecko_GetNodeFlags(RawGeckoNodeBorrowed aNode)
{
return aNode->GetFlags();
}
void
Gecko_SetNodeFlags(RawGeckoNodeBorrowed aNode, uint32_t aFlags)
{
const_cast<nsINode*>(aNode)->SetFlags(aFlags);
}
void
Gecko_UnsetNodeFlags(RawGeckoNodeBorrowed aNode, uint32_t aFlags)
{
const_cast<nsINode*>(aNode)->UnsetFlags(aFlags);
}
nsStyleContext*
Gecko_GetStyleContext(RawGeckoNodeBorrowed aNode, nsIAtom* aPseudoTagOrNull)
{
MOZ_ASSERT(aNode->IsContent());
nsIFrame* relevantFrame =
ServoRestyleManager::FrameForPseudoElement(aNode->AsContent(),
aPseudoTagOrNull);
if (!relevantFrame) {
return nullptr;
}
return relevantFrame->StyleContext();
}
nsChangeHint
Gecko_CalcStyleDifference(nsStyleContext* aOldStyleContext,
ServoComputedValuesBorrowed aComputedValues)
{
MOZ_ASSERT(aOldStyleContext);
MOZ_ASSERT(aComputedValues);
// Pass the safe thing, which causes us to miss a potential optimization. See
// bug 1289863.
nsChangeHint forDescendants = nsChangeHint_Hints_NotHandledForDescendants;
// Eventually, we should compute things out of these flags like
// ElementRestyler::RestyleSelf does and pass the result to the caller to
// potentially halt traversal. See bug 1289868.
uint32_t equalStructs, samePointerStructs;
nsChangeHint result =
aOldStyleContext->CalcStyleDifference(aComputedValues,
forDescendants,
&equalStructs,
&samePointerStructs);
return result;
}
void
Gecko_StoreStyleDifference(RawGeckoNodeBorrowed aNode, nsChangeHint aChangeHintToStore)
{
#ifdef MOZ_STYLO
MOZ_ASSERT(aNode->IsElement());
MOZ_ASSERT(aNode->IsDirtyForServo(),
"Change hint stored in a not-dirty node");
const Element* aElement = aNode->AsElement();
nsIFrame* primaryFrame = aElement->GetPrimaryFrame();
if (!primaryFrame) {
// If there's no primary frame, that means that either this content is
// undisplayed (so we only need to check at the restyling phase for the
// display value on the element), or is a display: contents element.
//
// In this second case, we should store it in the frame constructor display
// contents map. Note that while this operation looks hairy, this would be
// thread-safe because the content should be there already (we'd only need
// to read the map and modify our entry).
//
// That being said, we still don't support display: contents anyway, so it's
// probably not worth it to do all the roundtrip just yet until we have a
// more concrete plan.
return;
}
if ((aChangeHintToStore & nsChangeHint_ReconstructFrame) &&
aNode->IsInNativeAnonymousSubtree())
{
NS_WARNING("stylo: Removing forbidden frame reconstruction hint on native "
"anonymous content. Fix this in bug 1297857!");
aChangeHintToStore &= ~nsChangeHint_ReconstructFrame;
}
primaryFrame->StyleContext()->StoreChangeHint(aChangeHintToStore);
#else
MOZ_CRASH("stylo: Shouldn't call Gecko_StoreStyleDifference in "
"non-stylo build");
#endif
}
RawServoDeclarationBlockStrongBorrowedOrNull
Gecko_GetServoDeclarationBlock(RawGeckoElementBorrowed aElement)
{
const nsAttrValue* attr = aElement->GetParsedAttr(nsGkAtoms::style);
if (!attr || attr->Type() != nsAttrValue::eCSSDeclaration) {
return nullptr;
}
DeclarationBlock* decl = attr->GetCSSDeclarationValue();
if (!decl) {
return nullptr;
}
if (decl->IsGecko()) {
// XXX This can happen at least when script sets style attribute
// since we haven't implemented Element.style for stylo. But
// we may want to turn it into an assertion after that's done.
NS_WARNING("stylo: requesting a Gecko declaration block?");
return nullptr;
}
return reinterpret_cast<const RawServoDeclarationBlockStrong*>
(decl->AsServo()->RefRaw());
}
void
Gecko_FillAllBackgroundLists(nsStyleImageLayers* aLayers, uint32_t aMaxLen)
{
nsRuleNode::FillAllBackgroundLists(*aLayers, aMaxLen);
}
void
Gecko_FillAllMaskLists(nsStyleImageLayers* aLayers, uint32_t aMaxLen)
{
nsRuleNode::FillAllMaskLists(*aLayers, aMaxLen);
}
template <typename Implementor>
static nsIAtom*
AtomAttrValue(Implementor* aElement, nsIAtom* aName)
{
const nsAttrValue* attr = aElement->GetParsedAttr(aName);
return attr ? attr->GetAtomValue() : nullptr;
}
template <typename Implementor, typename MatchFn>
static bool
DoMatch(Implementor* aElement, nsIAtom* aNS, nsIAtom* aName, MatchFn aMatch)
{
if (aNS) {
int32_t ns = nsContentUtils::NameSpaceManager()->GetNameSpaceID(aNS,
aElement->IsInChromeDocument());
NS_ENSURE_TRUE(ns != kNameSpaceID_Unknown, false);
const nsAttrValue* value = aElement->GetParsedAttr(aName, ns);
return value && aMatch(value);
}
// No namespace means any namespace - we have to check them all. :-(
BorrowedAttrInfo attrInfo;
for (uint32_t i = 0; (attrInfo = aElement->GetAttrInfoAt(i)); ++i) {
if (attrInfo.mName->LocalName() != aName) {
continue;
}
if (aMatch(attrInfo.mValue)) {
return true;
}
}
return false;
}
template <typename Implementor>
static bool
HasAttr(Implementor* aElement, nsIAtom* aNS, nsIAtom* aName)
{
auto match = [](const nsAttrValue* aValue) { return true; };
return DoMatch(aElement, aNS, aName, match);
}
template <typename Implementor>
static bool
AttrEquals(Implementor* aElement, nsIAtom* aNS, nsIAtom* aName, nsIAtom* aStr,
bool aIgnoreCase)
{
auto match = [aStr, aIgnoreCase](const nsAttrValue* aValue) {
return aValue->Equals(aStr, aIgnoreCase ? eIgnoreCase : eCaseMatters);
};
return DoMatch(aElement, aNS, aName, match);
}
template <typename Implementor>
static bool
AttrDashEquals(Implementor* aElement, nsIAtom* aNS, nsIAtom* aName,
nsIAtom* aStr)
{
auto match = [aStr](const nsAttrValue* aValue) {
nsAutoString str;
aValue->ToString(str);
const nsDefaultStringComparator c;
return nsStyleUtil::DashMatchCompare(str, nsDependentAtomString(aStr), c);
};
return DoMatch(aElement, aNS, aName, match);
}
template <typename Implementor>
static bool
AttrIncludes(Implementor* aElement, nsIAtom* aNS, nsIAtom* aName,
nsIAtom* aStr)
{
auto match = [aStr](const nsAttrValue* aValue) {
nsAutoString str;
aValue->ToString(str);
const nsDefaultStringComparator c;
return nsStyleUtil::ValueIncludes(str, nsDependentAtomString(aStr), c);
};
return DoMatch(aElement, aNS, aName, match);
}
template <typename Implementor>
static bool
AttrHasSubstring(Implementor* aElement, nsIAtom* aNS, nsIAtom* aName,
nsIAtom* aStr)
{
auto match = [aStr](const nsAttrValue* aValue) {
nsAutoString str;
aValue->ToString(str);
return FindInReadable(str, nsDependentAtomString(aStr));
};
return DoMatch(aElement, aNS, aName, match);
}
template <typename Implementor>
static bool
AttrHasPrefix(Implementor* aElement, nsIAtom* aNS, nsIAtom* aName,
nsIAtom* aStr)
{
auto match = [aStr](const nsAttrValue* aValue) {
nsAutoString str;
aValue->ToString(str);
return StringBeginsWith(str, nsDependentAtomString(aStr));
};
return DoMatch(aElement, aNS, aName, match);
}
template <typename Implementor>
static bool
AttrHasSuffix(Implementor* aElement, nsIAtom* aNS, nsIAtom* aName,
nsIAtom* aStr)
{
auto match = [aStr](const nsAttrValue* aValue) {
nsAutoString str;
aValue->ToString(str);
return StringEndsWith(str, nsDependentAtomString(aStr));
};
return DoMatch(aElement, aNS, aName, match);
}
/**
* Gets the class or class list (if any) of the implementor. The calling
* convention here is rather hairy, and is optimized for getting Servo the
* information it needs for hot calls.
*
* The return value indicates the number of classes. If zero, neither outparam
* is valid. If one, the class_ outparam is filled with the atom of the class.
* If two or more, the classList outparam is set to point to an array of atoms
* representing the class list.
*
* The array is borrowed and the atoms are not addrefed. These values can be
* invalidated by any DOM mutation. Use them in a tight scope.
*/
template <typename Implementor>
static uint32_t
ClassOrClassList(Implementor* aElement, nsIAtom** aClass, nsIAtom*** aClassList)
{
const nsAttrValue* attr = aElement->GetParsedAttr(nsGkAtoms::_class);
if (!attr) {
return 0;
}
// For class values with only whitespace, Gecko just stores a string. For the
// purposes of the style system, there is no class in this case.
if (attr->Type() == nsAttrValue::eString) {
MOZ_ASSERT(nsContentUtils::TrimWhitespace<nsContentUtils::IsHTMLWhitespace>(
attr->GetStringValue()).IsEmpty());
return 0;
}
// Single tokens are generally stored as an atom. Check that case.
if (attr->Type() == nsAttrValue::eAtom) {
*aClass = attr->GetAtomValue();
return 1;
}
// At this point we should have an atom array. It is likely, but not
// guaranteed, that we have two or more elements in the array.
MOZ_ASSERT(attr->Type() == nsAttrValue::eAtomArray);
nsTArray<nsCOMPtr<nsIAtom>>* atomArray = attr->GetAtomArrayValue();
uint32_t length = atomArray->Length();
// Special case: zero elements.
if (length == 0) {
return 0;
}
// Special case: one element.
if (length == 1) {
*aClass = atomArray->ElementAt(0);
return 1;
}
// General case: Two or more elements.
//
// Note: We could also expose this array as an array of nsCOMPtrs, since
// bindgen knows what those look like, and eliminate the reinterpret_cast.
// But it's not obvious that that would be preferable.
static_assert(sizeof(nsCOMPtr<nsIAtom>) == sizeof(nsIAtom*), "Bad simplification");
static_assert(alignof(nsCOMPtr<nsIAtom>) == alignof(nsIAtom*), "Bad simplification");
nsCOMPtr<nsIAtom>* elements = atomArray->Elements();
nsIAtom** rawElements = reinterpret_cast<nsIAtom**>(elements);
*aClassList = rawElements;
return atomArray->Length();
}
#define SERVO_IMPL_ELEMENT_ATTR_MATCHING_FUNCTIONS(prefix_, implementor_) \
nsIAtom* prefix_##AtomAttrValue(implementor_ aElement, nsIAtom* aName) \
{ \
return AtomAttrValue(aElement, aName); \
} \
bool prefix_##HasAttr(implementor_ aElement, nsIAtom* aNS, nsIAtom* aName) \
{ \
return HasAttr(aElement, aNS, aName); \
} \
bool prefix_##AttrEquals(implementor_ aElement, nsIAtom* aNS, \
nsIAtom* aName, nsIAtom* aStr, bool aIgnoreCase) \
{ \
return AttrEquals(aElement, aNS, aName, aStr, aIgnoreCase); \
} \
bool prefix_##AttrDashEquals(implementor_ aElement, nsIAtom* aNS, \
nsIAtom* aName, nsIAtom* aStr) \
{ \
return AttrDashEquals(aElement, aNS, aName, aStr); \
} \
bool prefix_##AttrIncludes(implementor_ aElement, nsIAtom* aNS, \
nsIAtom* aName, nsIAtom* aStr) \
{ \
return AttrIncludes(aElement, aNS, aName, aStr); \
} \
bool prefix_##AttrHasSubstring(implementor_ aElement, nsIAtom* aNS, \
nsIAtom* aName, nsIAtom* aStr) \
{ \
return AttrHasSubstring(aElement, aNS, aName, aStr); \
} \
bool prefix_##AttrHasPrefix(implementor_ aElement, nsIAtom* aNS, \
nsIAtom* aName, nsIAtom* aStr) \
{ \
return AttrHasPrefix(aElement, aNS, aName, aStr); \
} \
bool prefix_##AttrHasSuffix(implementor_ aElement, nsIAtom* aNS, \
nsIAtom* aName, nsIAtom* aStr) \
{ \
return AttrHasSuffix(aElement, aNS, aName, aStr); \
} \
uint32_t prefix_##ClassOrClassList(implementor_ aElement, nsIAtom** aClass, \
nsIAtom*** aClassList) \
{ \
return ClassOrClassList(aElement, aClass, aClassList); \
}
SERVO_IMPL_ELEMENT_ATTR_MATCHING_FUNCTIONS(Gecko_, RawGeckoElementBorrowed)
SERVO_IMPL_ELEMENT_ATTR_MATCHING_FUNCTIONS(Gecko_Snapshot, ServoElementSnapshot*)
#undef SERVO_IMPL_ELEMENT_ATTR_MATCHING_FUNCTIONS
nsIAtom*
Gecko_Atomize(const char* aString, uint32_t aLength)
{
return NS_Atomize(nsDependentCSubstring(aString, aLength)).take();
}
void
Gecko_AddRefAtom(nsIAtom* aAtom)
{
NS_ADDREF(aAtom);
}
void
Gecko_ReleaseAtom(nsIAtom* aAtom)
{
NS_RELEASE(aAtom);
}
const uint16_t*
Gecko_GetAtomAsUTF16(nsIAtom* aAtom, uint32_t* aLength)
{
static_assert(sizeof(char16_t) == sizeof(uint16_t), "Servo doesn't know what a char16_t is");
MOZ_ASSERT(aAtom);
*aLength = aAtom->GetLength();
// We need to manually cast from char16ptr_t to const char16_t* to handle the
// MOZ_USE_CHAR16_WRAPPER we use on WIndows.
return reinterpret_cast<const uint16_t*>(static_cast<const char16_t*>(aAtom->GetUTF16String()));
}
bool
Gecko_AtomEqualsUTF8(nsIAtom* aAtom, const char* aString, uint32_t aLength)
{
// XXXbholley: We should be able to do this without converting, I just can't
// find the right thing to call.
nsDependentAtomString atomStr(aAtom);
NS_ConvertUTF8toUTF16 inStr(nsDependentCSubstring(aString, aLength));
return atomStr.Equals(inStr);
}
bool
Gecko_AtomEqualsUTF8IgnoreCase(nsIAtom* aAtom, const char* aString, uint32_t aLength)
{
// XXXbholley: We should be able to do this without converting, I just can't
// find the right thing to call.
nsDependentAtomString atomStr(aAtom);
NS_ConvertUTF8toUTF16 inStr(nsDependentCSubstring(aString, aLength));
return nsContentUtils::EqualsIgnoreASCIICase(atomStr, inStr);
}
void
Gecko_Utf8SliceToString(nsString* aString,
const uint8_t* aBuffer,
size_t aBufferLen)
{
MOZ_ASSERT(aString);
MOZ_ASSERT(aBuffer);
aString->Truncate();
AppendUTF8toUTF16(Substring(reinterpret_cast<const char*>(aBuffer),
aBufferLen), *aString);
}
void
Gecko_FontFamilyList_Clear(FontFamilyList* aList) {
aList->Clear();
}
void
Gecko_FontFamilyList_AppendNamed(FontFamilyList* aList, nsIAtom* aName)
{
// Servo doesn't record whether the name was quoted or unquoted, so just
// assume unquoted for now.
FontFamilyName family;
aName->ToString(family.mName);
aList->Append(family);
}
void
Gecko_FontFamilyList_AppendGeneric(FontFamilyList* aList, FontFamilyType aType)
{
aList->Append(FontFamilyName(aType));
}
void
Gecko_CopyFontFamilyFrom(nsFont* dst, const nsFont* src)
{
dst->fontlist = src->fontlist;
}
void
Gecko_SetListStyleType(nsStyleList* style_struct, uint32_t type)
{
// Builtin counter styles are static and use no-op refcounting, and thus are
// safe to use off-main-thread.
style_struct->SetCounterStyle(CounterStyleManager::GetBuiltinStyle(type));
}
void
Gecko_CopyListStyleTypeFrom(nsStyleList* dst, const nsStyleList* src)
{
dst->SetCounterStyle(src->GetCounterStyle());
}
NS_IMPL_HOLDER_FFI_REFCOUNTING(nsIPrincipal, Principal)
NS_IMPL_HOLDER_FFI_REFCOUNTING(nsIURI, URI)
void
Gecko_SetMozBinding(nsStyleDisplay* aDisplay,
const uint8_t* aURLString, uint32_t aURLStringLength,
ThreadSafeURIHolder* aBaseURI,
ThreadSafeURIHolder* aReferrer,
ThreadSafePrincipalHolder* aPrincipal)
{
MOZ_ASSERT(aDisplay);
MOZ_ASSERT(aURLString);
MOZ_ASSERT(aBaseURI);
MOZ_ASSERT(aReferrer);
MOZ_ASSERT(aPrincipal);
nsString url;
nsDependentCSubstring urlString(reinterpret_cast<const char*>(aURLString),
aURLStringLength);
AppendUTF8toUTF16(urlString, url);
RefPtr<nsStringBuffer> urlBuffer = nsCSSValue::BufferFromString(url);
aDisplay->mBinding =
new css::URLValue(urlBuffer, do_AddRef(aBaseURI),
do_AddRef(aReferrer), do_AddRef(aPrincipal));
}
void
Gecko_CopyMozBindingFrom(nsStyleDisplay* aDest, const nsStyleDisplay* aSrc)
{
aDest->mBinding = aSrc->mBinding;
}
void
Gecko_SetNullImageValue(nsStyleImage* aImage)
{
MOZ_ASSERT(aImage);
aImage->SetNull();
}
void
Gecko_SetGradientImageValue(nsStyleImage* aImage, nsStyleGradient* aGradient)
{
MOZ_ASSERT(aImage);
aImage->SetGradientData(aGradient);
}
static already_AddRefed<nsStyleImageRequest>
CreateStyleImageRequest(nsStyleImageRequest::Mode aModeFlags,
const uint8_t* aURLString, uint32_t aURLStringLength,
ThreadSafeURIHolder* aBaseURI,
ThreadSafeURIHolder* aReferrer,
ThreadSafePrincipalHolder* aPrincipal)
{
MOZ_ASSERT(aURLString);
MOZ_ASSERT(aBaseURI);
MOZ_ASSERT(aReferrer);
MOZ_ASSERT(aPrincipal);
nsString url;
nsDependentCSubstring urlString(reinterpret_cast<const char*>(aURLString),
aURLStringLength);
AppendUTF8toUTF16(urlString, url);
RefPtr<nsStringBuffer> urlBuffer = nsCSSValue::BufferFromString(url);
RefPtr<nsStyleImageRequest> req =
new nsStyleImageRequest(aModeFlags, urlBuffer, do_AddRef(aBaseURI),
do_AddRef(aReferrer), do_AddRef(aPrincipal));
return req.forget();
}
void
Gecko_SetUrlImageValue(nsStyleImage* aImage,
const uint8_t* aURLString, uint32_t aURLStringLength,
ThreadSafeURIHolder* aBaseURI,
ThreadSafeURIHolder* aReferrer,
ThreadSafePrincipalHolder* aPrincipal)
{
RefPtr<nsStyleImageRequest> req =
CreateStyleImageRequest(nsStyleImageRequest::Mode::Track,
aURLString, aURLStringLength,
aBaseURI, aReferrer, aPrincipal);
aImage->SetImageRequest(req.forget());
}
void
Gecko_CopyImageValueFrom(nsStyleImage* aImage, const nsStyleImage* aOther)
{
MOZ_ASSERT(aImage);
MOZ_ASSERT(aOther);
*aImage = *aOther;
}
nsStyleGradient*
Gecko_CreateGradient(uint8_t aShape,
uint8_t aSize,
bool aRepeating,
bool aLegacySyntax,
uint32_t aStopCount)
{
nsStyleGradient* result = new nsStyleGradient();
result->mShape = aShape;
result->mSize = aSize;
result->mRepeating = aRepeating;
result->mLegacySyntax = aLegacySyntax;
result->mAngle.SetNoneValue();
result->mBgPosX.SetNoneValue();
result->mBgPosY.SetNoneValue();
result->mRadiusX.SetNoneValue();
result->mRadiusY.SetNoneValue();
nsStyleGradientStop dummyStop;
dummyStop.mLocation.SetNoneValue();
dummyStop.mColor = NS_RGB(0, 0, 0);
dummyStop.mIsInterpolationHint = 0;
for (uint32_t i = 0; i < aStopCount; i++) {
result->mStops.AppendElement(dummyStop);
}
return result;
}
void
Gecko_SetListStyleImageNone(nsStyleList* aList)
{
aList->mListStyleImage = nullptr;
}
void
Gecko_SetListStyleImage(nsStyleList* aList,
const uint8_t* aURLString, uint32_t aURLStringLength,
ThreadSafeURIHolder* aBaseURI,
ThreadSafeURIHolder* aReferrer,
ThreadSafePrincipalHolder* aPrincipal)
{
aList->mListStyleImage =
CreateStyleImageRequest(nsStyleImageRequest::Mode(0),
aURLString, aURLStringLength,
aBaseURI, aReferrer, aPrincipal);
}
void
Gecko_CopyListStyleImageFrom(nsStyleList* aList, const nsStyleList* aSource)
{
aList->mListStyleImage = aSource->mListStyleImage;
}
void
Gecko_EnsureTArrayCapacity(void* aArray, size_t aCapacity, size_t aElemSize)
{
auto base =
reinterpret_cast<nsTArray_base<nsTArrayInfallibleAllocator,
nsTArray_CopyWithMemutils>*>(aArray);
base->EnsureCapacity<nsTArrayInfallibleAllocator>(aCapacity, aElemSize);
}
void
Gecko_ClearPODTArray(void* aArray, size_t aElementSize, size_t aElementAlign)
{
auto base =
reinterpret_cast<nsTArray_base<nsTArrayInfallibleAllocator,
nsTArray_CopyWithMemutils>*>(aArray);
base->template ShiftData<nsTArrayInfallibleAllocator>(0, base->Length(), 0,
aElementSize, aElementAlign);
}
void
Gecko_ClearStyleContents(nsStyleContent* aContent)
{
aContent->AllocateContents(0);
}
void
Gecko_CopyStyleContentsFrom(nsStyleContent* aContent, const nsStyleContent* aOther)
{
uint32_t count = aOther->ContentCount();
aContent->AllocateContents(count);
for (uint32_t i = 0; i < count; ++i) {
aContent->ContentAt(i) = aOther->ContentAt(i);
}
}
void
Gecko_EnsureImageLayersLength(nsStyleImageLayers* aLayers, size_t aLen,
nsStyleImageLayers::LayerType aLayerType)
{
size_t oldLength = aLayers->mLayers.Length();
aLayers->mLayers.EnsureLengthAtLeast(aLen);
for (size_t i = oldLength; i < aLen; ++i) {
aLayers->mLayers[i].Initialize(aLayerType);
}
}
void
Gecko_ResetStyleCoord(nsStyleUnit* aUnit, nsStyleUnion* aValue)
{
nsStyleCoord::Reset(*aUnit, *aValue);
}
void
Gecko_SetStyleCoordCalcValue(nsStyleUnit* aUnit, nsStyleUnion* aValue, nsStyleCoord::CalcValue aCalc)
{
// Calc units should be cleaned up first
MOZ_ASSERT(*aUnit != nsStyleUnit::eStyleUnit_Calc);
nsStyleCoord::Calc* calcRef = new nsStyleCoord::Calc();
calcRef->mLength = aCalc.mLength;
calcRef->mPercent = aCalc.mPercent;
calcRef->mHasPercent = aCalc.mHasPercent;
*aUnit = nsStyleUnit::eStyleUnit_Calc;
aValue->mPointer = calcRef;
calcRef->AddRef();
}
void
Gecko_CopyClipPathValueFrom(mozilla::StyleClipPath* aDst, const mozilla::StyleClipPath* aSrc)
{
MOZ_ASSERT(aDst);
MOZ_ASSERT(aSrc);
*aDst = *aSrc;
}
void
Gecko_DestroyClipPath(mozilla::StyleClipPath* aClip)
{
aClip->~StyleClipPath();
}
mozilla::StyleBasicShape*
Gecko_NewBasicShape(mozilla::StyleBasicShapeType aType)
{
RefPtr<StyleBasicShape> ptr = new mozilla::StyleBasicShape(aType);
return ptr.forget().take();
}
void
Gecko_ResetFilters(nsStyleEffects* effects, size_t new_len)
{
effects->mFilters.Clear();
effects->mFilters.SetLength(new_len);
}
void
Gecko_CopyFiltersFrom(nsStyleEffects* aSrc, nsStyleEffects* aDest)
{
aDest->mFilters = aSrc->mFilters;
}
NS_IMPL_THREADSAFE_FFI_REFCOUNTING(nsStyleCoord::Calc, Calc);
nsCSSShadowArray*
Gecko_NewCSSShadowArray(uint32_t aLen)
{
RefPtr<nsCSSShadowArray> arr = new(aLen) nsCSSShadowArray(aLen);
return arr.forget().take();
}
NS_IMPL_THREADSAFE_FFI_REFCOUNTING(nsCSSShadowArray, CSSShadowArray);
nsStyleQuoteValues*
Gecko_NewStyleQuoteValues(uint32_t aLen)
{
RefPtr<nsStyleQuoteValues> values = new nsStyleQuoteValues;
values->mQuotePairs.SetLength(aLen);
return values.forget().take();
}
NS_IMPL_THREADSAFE_FFI_REFCOUNTING(nsStyleQuoteValues, QuoteValues);
nsCSSValueSharedList*
Gecko_NewCSSValueSharedList(uint32_t aLen)
{
RefPtr<nsCSSValueSharedList> list = new nsCSSValueSharedList;
if (aLen == 0) {
return list.forget().take();
}
list->mHead = new nsCSSValueList;
nsCSSValueList* cur = list->mHead;
for (uint32_t i = 0; i < aLen - 1; i++) {
cur->mNext = new nsCSSValueList;
cur = cur->mNext;
}
return list.forget().take();
}
void
Gecko_CSSValue_SetAbsoluteLength(nsCSSValueBorrowedMut aCSSValue, nscoord aLen)
{
aCSSValue->SetIntegerCoordValue(aLen);
}
void
Gecko_CSSValue_SetNumber(nsCSSValueBorrowedMut aCSSValue, float aNumber)
{
aCSSValue->SetFloatValue(aNumber, eCSSUnit_Number);
}
void
Gecko_CSSValue_SetKeyword(nsCSSValueBorrowedMut aCSSValue, nsCSSKeyword aKeyword)
{
aCSSValue->SetIntValue(aKeyword, eCSSUnit_Enumerated);
}
void
Gecko_CSSValue_SetPercentage(nsCSSValueBorrowedMut aCSSValue, float aPercent)
{
aCSSValue->SetFloatValue(aPercent, eCSSUnit_Number);
}
void
Gecko_CSSValue_SetAngle(nsCSSValueBorrowedMut aCSSValue, float aRadians)
{
aCSSValue->SetFloatValue(aRadians, eCSSUnit_Radian);
}
void
Gecko_CSSValue_SetCalc(nsCSSValueBorrowedMut aCSSValue, nsStyleCoord::CalcValue aCalc)
{
aCSSValue->SetCalcValue(&aCalc);
}
void
Gecko_CSSValue_SetFunction(nsCSSValueBorrowedMut aCSSValue, int32_t aLen)
{
nsCSSValue::Array* arr = nsCSSValue::Array::Create(aLen);
aCSSValue->SetArrayValue(arr, eCSSUnit_Function);
}
nsCSSValueBorrowedMut
Gecko_CSSValue_GetArrayItem(nsCSSValueBorrowedMut aCSSValue, int32_t aIndex)
{
return &aCSSValue->GetArrayValue()->Item(aIndex);
}
NS_IMPL_THREADSAFE_FFI_REFCOUNTING(nsCSSValueSharedList, CSSValueSharedList);
#define STYLE_STRUCT(name, checkdata_cb) \
\
void \
Gecko_Construct_nsStyle##name(nsStyle##name* ptr) \
{ \
new (ptr) nsStyle##name(StyleStructContext::ServoContext()); \
} \
\
void \
Gecko_CopyConstruct_nsStyle##name(nsStyle##name* ptr, \
const nsStyle##name* other) \
{ \
new (ptr) nsStyle##name(*other); \
} \
\
void \
Gecko_Destroy_nsStyle##name(nsStyle##name* ptr) \
{ \
ptr->~nsStyle##name(); \
}
#include "nsStyleStructList.h"
#undef STYLE_STRUCT
#ifndef MOZ_STYLO
#define SERVO_BINDING_FUNC(name_, return_, ...) \
return_ name_(__VA_ARGS__) { \
MOZ_CRASH("stylo: shouldn't be calling " #name_ "in a non-stylo build"); \
}
#include "ServoBindingList.h"
#undef SERVO_BINDING_FUNC
#endif
#ifdef MOZ_STYLO
const nsStyleVariables*
Servo_GetStyleVariables(ServoComputedValuesBorrowed aComputedValues)
{
// Servo can't provide us with Variables structs yet, so instead of linking
// to a Servo_GetStyleVariables defined in Servo we define one here that
// always returns the same, empty struct.
static nsStyleVariables variables(StyleStructContext::ServoContext());
return &variables;
}
#endif
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