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gecko-dev
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gecko-dev/layout/style/ServoBindings.cpp

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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/. */
#include "mozilla/ServoBindings.h"
#include "ChildIterator.h"
#include "GeckoProfiler.h"
#include "gfxFontFamilyList.h"
#include "nsAnimationManager.h"
#include "nsAttrValueInlines.h"
#include "nsCSSFrameConstructor.h"
#include "nsCSSProps.h"
#include "nsCSSParser.h"
#include "nsCSSPseudoElements.h"
#include "nsCSSRuleProcessor.h"
#include "nsContentUtils.h"
#include "nsDOMTokenList.h"
#include "nsIContentInlines.h"
#include "nsIDOMNode.h"
#include "nsIDocument.h"
#include "nsIDocumentInlines.h"
#include "nsIFrame.h"
#include "nsINode.h"
#include "nsIPresShell.h"
#include "nsIPresShellInlines.h"
#include "nsIPrincipal.h"
#include "nsFontMetrics.h"
#include "nsMappedAttributes.h"
#include "nsMediaFeatures.h"
#include "nsNameSpaceManager.h"
#include "nsNetUtil.h"
#include "nsRuleNode.h"
#include "nsString.h"
#include "nsStyleStruct.h"
#include "nsStyleUtil.h"
#include "nsSVGElement.h"
#include "nsTArray.h"
#include "nsTransitionManager.h"
#include "mozilla/DeclarationBlockInlines.h"
#include "mozilla/EffectCompositor.h"
#include "mozilla/EffectSet.h"
#include "mozilla/EventStates.h"
#include "mozilla/Keyframe.h"
#include "mozilla/Mutex.h"
#include "mozilla/ServoElementSnapshot.h"
#include "mozilla/ServoRestyleManager.h"
#include "mozilla/StyleAnimationValue.h"
#include "mozilla/SystemGroup.h"
#include "mozilla/ServoMediaList.h"
#include "mozilla/dom/Element.h"
#include "mozilla/dom/ElementInlines.h"
#include "mozilla/dom/HTMLTableCellElement.h"
#include "mozilla/dom/HTMLBodyElement.h"
#include "mozilla/LookAndFeel.h"
#include "mozilla/URLExtraData.h"
using namespace mozilla;
using namespace mozilla::dom;
#define SERVO_ARC_TYPE(name_, type_) \
already_AddRefed<type_> \
type_##Strong::Consume() { \
RefPtr<type_> result; \
result.swap(mPtr); \
return result.forget(); \
}
#include "mozilla/ServoArcTypeList.h"
#undef SERVO_ARC_TYPE
static Mutex* sServoFontMetricsLock = nullptr;
uint32_t
Gecko_ChildrenCount(RawGeckoNodeBorrowed aNode)
{
return aNode->GetChildCount();
}
bool
Gecko_NodeIsElement(RawGeckoNodeBorrowed aNode)
{
return aNode->IsElement();
}
bool
Gecko_IsInDocument(RawGeckoNodeBorrowed aNode)
{
return aNode->IsInComposedDoc();
}
#ifdef MOZ_DEBUG_RUST
bool
Gecko_FlattenedTreeParentIsParent(RawGeckoNodeBorrowed aNode)
{
// Servo calls this in debug builds to verify the result of its own
// flattened_tree_parent_is_parent() function.
return FlattenedTreeParentIsParent<nsIContent::eForStyle>(aNode);
}
#endif
/*
* Does this child count as significant for selector matching?
*
* See nsStyleUtil::IsSignificantChild for details.
*/
bool
Gecko_IsSignificantChild(RawGeckoNodeBorrowed aNode, bool aTextIsSignificant,
bool aWhitespaceIsSignificant)
{
return nsStyleUtil::ThreadSafeIsSignificantChild(aNode->AsContent(),
aTextIsSignificant,
aWhitespaceIsSignificant);
}
RawGeckoNodeBorrowedOrNull
Gecko_GetParentNode(RawGeckoNodeBorrowed aNode)
{
MOZ_ASSERT(!FlattenedTreeParentIsParent<nsIContent::eForStyle>(aNode),
"Should have taken the inline path");
MOZ_ASSERT(aNode->IsContent(), "Slow path only applies to content");
const nsIContent* c = aNode->AsContent();
return c->GetFlattenedTreeParentNodeInternal(nsIContent::eForStyle);
}
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)
{
return aElement->GetFlattenedTreeParentElementForStyle();
}
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_IsTextNode(RawGeckoNodeBorrowed aNode)
{
return aNode->NodeInfo()->NodeType() == nsIDOMNode::TEXT_NODE;
}
bool
Gecko_IsRootElement(RawGeckoElementBorrowed aElement)
{
return aElement->OwnerDoc()->GetRootElement() == aElement;
}
bool
Gecko_MatchesElement(CSSPseudoClassType aType,
RawGeckoElementBorrowed aElement)
{
return nsCSSPseudoClasses::MatchesElement(aType, aElement).value();
}
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);
}
void
Gecko_SetOwnerDocumentNeedsStyleFlush(RawGeckoElementBorrowed aElement)
{
MOZ_ASSERT(NS_IsMainThread());
if (nsIPresShell* shell = aElement->OwnerDoc()->GetShell()) {
shell->SetNeedStyleFlush();
shell->ObserveStyleFlushes();
}
}
nsStyleContext*
Gecko_GetStyleContext(RawGeckoNodeBorrowed aNode, nsIAtom* aPseudoTagOrNull)
{
MOZ_ASSERT(aNode->IsContent());
nsIFrame* relevantFrame =
ServoRestyleManager::FrameForPseudoElement(aNode->AsContent(),
aPseudoTagOrNull);
if (relevantFrame) {
return relevantFrame->StyleContext();
}
if (aPseudoTagOrNull) {
return nullptr;
}
// FIXME(emilio): Is there a shorter path?
nsCSSFrameConstructor* fc =
aNode->OwnerDoc()->GetShell()->GetPresContext()->FrameConstructor();
// NB: This is only called for CalcStyleDifference, and we handle correctly
// the display: none case since Servo still has the older style.
return fc->GetDisplayContentsStyleFor(aNode->AsContent());
}
nsChangeHint
Gecko_CalcStyleDifference(nsStyleContext* aOldStyleContext,
ServoComputedValuesBorrowed aComputedValues)
{
MOZ_ASSERT(aOldStyleContext);
MOZ_ASSERT(aComputedValues);
// 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,
&equalStructs,
&samePointerStructs);
return result;
}
nsChangeHint
Gecko_HintsHandledForDescendants(nsChangeHint aHint)
{
return aHint & ~NS_HintsNotHandledForDescendantsIn(aHint);
}
ServoElementSnapshotOwned
Gecko_CreateElementSnapshot(RawGeckoElementBorrowed aElement)
{
MOZ_ASSERT(NS_IsMainThread());
return new ServoElementSnapshot(aElement);
}
void
Gecko_DropElementSnapshot(ServoElementSnapshotOwned aSnapshot)
{
// Proxy deletes have a lot of overhead, so Servo tries hard to only drop
// snapshots on the main thread. However, there are certain cases where
// it's unavoidable (i.e. synchronously dropping the style data for the
// descendants of a new display:none root).
if (MOZ_UNLIKELY(!NS_IsMainThread())) {
nsCOMPtr<nsIRunnable> task = NS_NewRunnableFunction([=]() { delete aSnapshot; });
SystemGroup::Dispatch("Gecko_DropElementSnapshot", TaskCategory::Other,
task.forget());
} else {
delete aSnapshot;
}
}
RawServoDeclarationBlockStrongBorrowedOrNull
Gecko_GetStyleAttrDeclarationBlock(RawGeckoElementBorrowed aElement)
{
DeclarationBlock* decl = aElement->GetInlineStyleDeclaration();
if (!decl) {
return nullptr;
}
if (decl->IsGecko()) {
// XXX This can happen when nodes are adopted from a Gecko-style-backend
// document into a Servo-style-backend document. See bug 1330051.
NS_WARNING("stylo: requesting a Gecko declaration block?");
return nullptr;
}
return decl->AsServo()->RefRawStrong();
}
RawServoDeclarationBlockStrongBorrowedOrNull
Gecko_GetHTMLPresentationAttrDeclarationBlock(RawGeckoElementBorrowed aElement)
{
static_assert(sizeof(RefPtr<RawServoDeclarationBlock>) ==
sizeof(RawServoDeclarationBlockStrong),
"RefPtr should just be a pointer");
const nsMappedAttributes* attrs = aElement->GetMappedAttributes();
if (!attrs) {
auto* svg = nsSVGElement::FromContentOrNull(aElement);
if (svg) {
if (auto decl = svg->GetContentDeclarationBlock()) {
return decl->AsServo()->RefRawStrong();
}
}
return nullptr;
}
const RefPtr<RawServoDeclarationBlock>& servo = attrs->GetServoStyle();
return reinterpret_cast<const RawServoDeclarationBlockStrong*>(&servo);
}
RawServoDeclarationBlockStrongBorrowedOrNull
Gecko_GetExtraContentStyleDeclarations(RawGeckoElementBorrowed aElement)
{
static_assert(sizeof(RefPtr<RawServoDeclarationBlock>) ==
sizeof(RawServoDeclarationBlockStrong),
"RefPtr should just be a pointer");
if (!aElement->IsAnyOfHTMLElements(nsGkAtoms::td, nsGkAtoms::th)) {
return nullptr;
}
const HTMLTableCellElement* cell = static_cast<const HTMLTableCellElement*>(aElement);
if (nsMappedAttributes* attrs = cell->GetMappedAttributesInheritedFromTable()) {
const RefPtr<RawServoDeclarationBlock>& servo = attrs->GetServoStyle();
return reinterpret_cast<const RawServoDeclarationBlockStrong*>(&servo);
}
return nullptr;
}
bool
Gecko_GetAnimationRule(RawGeckoElementBorrowed aElement,
nsIAtom* aPseudoTag,
EffectCompositor::CascadeLevel aCascadeLevel,
RawServoAnimationValueMapBorrowed aAnimationValues)
{
MOZ_ASSERT(aElement, "Invalid GeckoElement");
MOZ_ASSERT(!aPseudoTag ||
aPseudoTag == nsCSSPseudoElements::before ||
aPseudoTag == nsCSSPseudoElements::after);
nsIDocument* doc = aElement->GetComposedDoc();
if (!doc || !doc->GetShell()) {
return false;
}
nsPresContext* presContext = doc->GetShell()->GetPresContext();
if (!presContext || !presContext->IsDynamic()) {
// For print or print preview, ignore animations.
return false;
}
CSSPseudoElementType pseudoType =
nsCSSPseudoElements::GetPseudoType(
aPseudoTag,
nsCSSProps::EnabledState::eIgnoreEnabledState);
return presContext->EffectCompositor()
->GetServoAnimationRule(aElement, pseudoType,
aCascadeLevel,
aAnimationValues);
}
bool
Gecko_StyleAnimationsEquals(RawGeckoStyleAnimationListBorrowed aA,
RawGeckoStyleAnimationListBorrowed aB)
{
return *aA == *aB;
}
void
Gecko_UpdateAnimations(RawGeckoElementBorrowed aElement,
nsIAtom* aPseudoTagOrNull,
ServoComputedValuesBorrowedOrNull aOldComputedValues,
ServoComputedValuesBorrowedOrNull aComputedValues,
ServoComputedValuesBorrowedOrNull aParentComputedValues,
UpdateAnimationsTasks aTaskBits)
{
MOZ_ASSERT(NS_IsMainThread());
MOZ_ASSERT(aElement);
MOZ_ASSERT(!aPseudoTagOrNull ||
aPseudoTagOrNull == nsCSSPseudoElements::before ||
aPseudoTagOrNull == nsCSSPseudoElements::after);
nsPresContext* presContext = nsContentUtils::GetContextForContent(aElement);
if (!presContext) {
return;
}
UpdateAnimationsTasks tasks = static_cast<UpdateAnimationsTasks>(aTaskBits);
if (presContext->IsDynamic() && aElement->IsInComposedDoc()) {
const ServoComputedValuesWithParent servoValues =
{ aComputedValues, aParentComputedValues };
CSSPseudoElementType pseudoType =
nsCSSPseudoElements::GetPseudoType(aPseudoTagOrNull,
CSSEnabledState::eForAllContent);
if (tasks & UpdateAnimationsTasks::CSSAnimations) {
presContext->AnimationManager()->
UpdateAnimations(const_cast<dom::Element*>(aElement), pseudoType,
servoValues);
}
if (tasks & UpdateAnimationsTasks::CSSTransitions) {
MOZ_ASSERT(aOldComputedValues);
const ServoComputedValuesWithParent oldServoValues =
{ aOldComputedValues, nullptr };
presContext->TransitionManager()->
UpdateTransitions(const_cast<dom::Element*>(aElement), pseudoType,
oldServoValues, servoValues);
}
if (tasks & UpdateAnimationsTasks::EffectProperties) {
presContext->EffectCompositor()->UpdateEffectProperties(
servoValues, const_cast<dom::Element*>(aElement), pseudoType);
}
}
}
bool
Gecko_ElementHasAnimations(RawGeckoElementBorrowed aElement,
nsIAtom* aPseudoTagOrNull)
{
MOZ_ASSERT(!aPseudoTagOrNull ||
aPseudoTagOrNull == nsCSSPseudoElements::before ||
aPseudoTagOrNull == nsCSSPseudoElements::after);
CSSPseudoElementType pseudoType =
nsCSSPseudoElements::GetPseudoType(aPseudoTagOrNull,
CSSEnabledState::eForAllContent);
return !!EffectSet::GetEffectSet(aElement, pseudoType);
}
bool
Gecko_ElementHasCSSAnimations(RawGeckoElementBorrowed aElement,
nsIAtom* aPseudoTagOrNull)
{
nsAnimationManager::CSSAnimationCollection* collection =
nsAnimationManager::CSSAnimationCollection
::GetAnimationCollection(aElement, aPseudoTagOrNull);
return collection && !collection->mAnimations.IsEmpty();
}
bool
Gecko_ElementHasCSSTransitions(RawGeckoElementBorrowed aElement,
nsIAtom* aPseudoTagOrNull)
{
nsTransitionManager::CSSTransitionCollection* collection =
nsTransitionManager::CSSTransitionCollection
::GetAnimationCollection(aElement, aPseudoTagOrNull);
return collection && !collection->mAnimations.IsEmpty();
}
size_t
Gecko_ElementTransitions_Length(RawGeckoElementBorrowed aElement,
nsIAtom* aPseudoTagOrNull)
{
nsTransitionManager::CSSTransitionCollection* collection =
nsTransitionManager::CSSTransitionCollection
::GetAnimationCollection(aElement, aPseudoTagOrNull);
return collection ? collection->mAnimations.Length() : 0;
}
static CSSTransition*
GetCurrentTransitionAt(RawGeckoElementBorrowed aElement,
nsIAtom* aPseudoTagOrNull,
size_t aIndex)
{
nsTransitionManager::CSSTransitionCollection* collection =
nsTransitionManager::CSSTransitionCollection
::GetAnimationCollection(aElement, aPseudoTagOrNull);
if (!collection) {
return nullptr;
}
nsTArray<RefPtr<CSSTransition>>& transitions = collection->mAnimations;
return aIndex < transitions.Length()
? transitions[aIndex].get()
: nullptr;
}
nsCSSPropertyID
Gecko_ElementTransitions_PropertyAt(RawGeckoElementBorrowed aElement,
nsIAtom* aPseudoTagOrNull,
size_t aIndex)
{
CSSTransition* transition = GetCurrentTransitionAt(aElement,
aPseudoTagOrNull,
aIndex);
return transition ? transition->TransitionProperty()
: nsCSSPropertyID::eCSSProperty_UNKNOWN;
}
RawServoAnimationValueBorrowedOrNull
Gecko_ElementTransitions_EndValueAt(RawGeckoElementBorrowed aElement,
nsIAtom* aPseudoTagOrNull,
size_t aIndex)
{
CSSTransition* transition = GetCurrentTransitionAt(aElement,
aPseudoTagOrNull,
aIndex);
return transition ? transition->ToValue().mServo.get() : nullptr;
}
double
Gecko_GetProgressFromComputedTiming(RawGeckoComputedTimingBorrowed aComputedTiming)
{
return aComputedTiming->mProgress.Value();
}
double
Gecko_GetPositionInSegment(RawGeckoAnimationPropertySegmentBorrowed aSegment,
double aProgress,
ComputedTimingFunction::BeforeFlag aBeforeFlag)
{
MOZ_ASSERT(aSegment->mFromKey < aSegment->mToKey,
"The segment from key should be less than to key");
double positionInSegment =
(aProgress - aSegment->mFromKey) / (aSegment->mToKey - aSegment->mFromKey);
return ComputedTimingFunction::GetPortion(aSegment->mTimingFunction,
positionInSegment,
aBeforeFlag);
}
RawServoAnimationValueBorrowedOrNull
Gecko_AnimationGetBaseStyle(void* aBaseStyles, nsCSSPropertyID aProperty)
{
auto base =
static_cast<nsRefPtrHashtable<nsUint32HashKey, RawServoAnimationValue>*>
(aBaseStyles);
return base->GetWeak(aProperty);
}
void
Gecko_FillAllBackgroundLists(nsStyleImageLayers* aLayers, uint32_t aMaxLen)
{
nsRuleNode::FillAllBackgroundLists(*aLayers, aMaxLen);
}
void
Gecko_FillAllMaskLists(nsStyleImageLayers* aLayers, uint32_t aMaxLen)
{
nsRuleNode::FillAllMaskLists(*aLayers, aMaxLen);
}
RawGeckoElementBorrowedOrNull
Gecko_GetBody(RawGeckoPresContextBorrowed aPresContext)
{
return aPresContext->Document()->GetBodyElement();
}
nscolor Gecko_GetLookAndFeelSystemColor(int32_t aId,
RawGeckoPresContextBorrowed aPresContext)
{
bool useStandinsForNativeColors = aPresContext && !aPresContext->IsChrome();
nscolor result;
LookAndFeel::ColorID colorId = static_cast<LookAndFeel::ColorID>(aId);
LookAndFeel::GetColor(colorId, useStandinsForNativeColors, &result);
return result;
}
bool
Gecko_MatchStringArgPseudo(RawGeckoElementBorrowed aElement,
CSSPseudoClassType aType,
const char16_t* aIdent,
bool* aSetSlowSelectorFlag)
{
EventStates dummyMask; // mask is never read because we pass aDependence=nullptr
return nsCSSRuleProcessor::StringPseudoMatches(aElement, aType, aIdent,
aElement->OwnerDoc(), true,
dummyMask, aSetSlowSelectorFlag, nullptr);
}
nsIAtom*
Gecko_GetXMLLangValue(RawGeckoElementBorrowed aElement)
{
nsString string;
if (aElement->GetAttr(kNameSpaceID_XML, nsGkAtoms::lang, string)) {
return NS_Atomize(string).take();
}
return nullptr;
}
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, const ServoElementSnapshot*)
#undef SERVO_IMPL_ELEMENT_ATTR_MATCHING_FUNCTIONS
nsIAtom*
Gecko_Atomize(const char* aString, uint32_t aLength)
{
return NS_Atomize(nsDependentCSubstring(aString, aLength)).take();
}
nsIAtom*
Gecko_Atomize16(const nsAString* aString)
{
return NS_Atomize(*aString).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_FontFamilyList_Clear(FontFamilyList* aList) {
aList->Clear();
}
void
Gecko_FontFamilyList_AppendNamed(FontFamilyList* aList, nsIAtom* aName, bool aQuoted)
{
FontFamilyName family;
aName->ToString(family.mName);
if (aQuoted) {
family.mType = eFamily_named_quoted;
}
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_nsFont_InitSystem(nsFont* aDest, int32_t aFontId,
const nsStyleFont* aFont, RawGeckoPresContextBorrowed aPresContext)
{
MutexAutoLock lock(*sServoFontMetricsLock);
const nsFont* defaultVariableFont =
aPresContext->GetDefaultFont(kPresContext_DefaultVariableFont_ID,
aFont->mLanguage);
// We have passed uninitialized memory to this function,
// initialize it. We can't simply return an nsFont because then
// we need to know its size beforehand. Servo cannot initialize nsFont
// itself, so this will do.
nsFont* system = new (aDest) nsFont(*defaultVariableFont);
MOZ_RELEASE_ASSERT(system);
*aDest = *defaultVariableFont;
LookAndFeel::FontID fontID = static_cast<LookAndFeel::FontID>(aFontId);
nsRuleNode::ComputeSystemFont(aDest, fontID, aPresContext, defaultVariableFont);
}
void
Gecko_nsFont_Destroy(nsFont* aDest)
{
aDest->~nsFont();
}
void
Gecko_SetImageOrientation(nsStyleVisibility* aVisibility,
double aRadians, bool aFlip)
{
aVisibility->mImageOrientation =
nsStyleImageOrientation::CreateAsAngleAndFlip(aRadians, aFlip);
}
void
Gecko_SetImageOrientationAsFromImage(nsStyleVisibility* aVisibility)
{
aVisibility->mImageOrientation = nsStyleImageOrientation::CreateAsFromImage();
}
void
Gecko_CopyImageOrientationFrom(nsStyleVisibility* aDst,
const nsStyleVisibility* aSrc)
{
aDst->mImageOrientation = aSrc->mImageOrientation;
}
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());
}
already_AddRefed<css::URLValue>
ServoBundledURI::IntoCssUrl()
{
if (!mURLString) {
return nullptr;
}
MOZ_ASSERT(mExtraData->GetReferrer());
MOZ_ASSERT(mExtraData->GetPrincipal());
NS_ConvertUTF8toUTF16 url(reinterpret_cast<const char*>(mURLString),
mURLStringLength);
RefPtr<css::URLValue> urlValue =
new css::URLValue(url, do_AddRef(mExtraData));
return urlValue.forget();
}
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,
ServoBundledURI aURI)
{
MOZ_ASSERT(aURI.mURLString);
MOZ_ASSERT(aURI.mExtraData->GetReferrer());
MOZ_ASSERT(aURI.mExtraData->GetPrincipal());
NS_ConvertUTF8toUTF16 url(reinterpret_cast<const char*>(aURI.mURLString),
aURI.mURLStringLength);
RefPtr<nsStyleImageRequest> req =
new nsStyleImageRequest(aModeFlags, url, do_AddRef(aURI.mExtraData));
return req.forget();
}
void
Gecko_SetUrlImageValue(nsStyleImage* aImage, ServoBundledURI aURI)
{
RefPtr<nsStyleImageRequest> req =
CreateStyleImageRequest(nsStyleImageRequest::Mode::Track, aURI);
aImage->SetImageRequest(req.forget());
}
void
Gecko_SetImageElement(nsStyleImage* aImage, nsIAtom* aAtom) {
MOZ_ASSERT(aImage);
aImage->SetElementId(do_AddRef(aAtom));
}
void
Gecko_CopyImageValueFrom(nsStyleImage* aImage, const nsStyleImage* aOther)
{
MOZ_ASSERT(aImage);
MOZ_ASSERT(aOther);
*aImage = *aOther;
}
void
Gecko_InitializeImageCropRect(nsStyleImage* aImage)
{
MOZ_ASSERT(aImage);
aImage->SetCropRect(MakeUnique<nsStyleSides>());
}
void
Gecko_SetCursorArrayLength(nsStyleUserInterface* aStyleUI, size_t aLen)
{
aStyleUI->mCursorImages.Clear();
aStyleUI->mCursorImages.SetLength(aLen);
}
void
Gecko_SetCursorImage(nsCursorImage* aCursor, ServoBundledURI aURI)
{
aCursor->mImage =
CreateStyleImageRequest(nsStyleImageRequest::Mode::Discard, aURI);
}
void
Gecko_CopyCursorArrayFrom(nsStyleUserInterface* aDest,
const nsStyleUserInterface* aSrc)
{
aDest->mCursorImages = aSrc->mCursorImages;
}
void
Gecko_SetContentDataImage(nsStyleContentData* aContent, ServoBundledURI aURI)
{
RefPtr<nsStyleImageRequest> req = CreateStyleImageRequest(nsStyleImageRequest::Mode::Track, aURI);
aContent->SetImageRequest(req.forget());
}
void
Gecko_SetContentDataArray(nsStyleContentData* aContent,
nsStyleContentType aType, uint32_t aLen)
{
nsCSSValue::Array* arr = nsCSSValue::Array::Create(aLen);
aContent->SetCounters(aType, arr);
}
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,
ServoBundledURI aURI)
{
aList->mListStyleImage =
CreateStyleImageRequest(nsStyleImageRequest::Mode(0), aURI);
}
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_CopyStyleGridTemplateValues(nsStyleGridTemplate* aGridTemplate,
const nsStyleGridTemplate* aOther)
{
*aGridTemplate = *aOther;
}
void
Gecko_ClearAndResizeStyleContents(nsStyleContent* aContent, uint32_t aHowMany)
{
aContent->AllocateContents(aHowMany);
}
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_ClearAndResizeCounterIncrements(nsStyleContent* aContent, uint32_t aHowMany)
{
aContent->AllocateCounterIncrements(aHowMany);
}
void
Gecko_CopyCounterIncrementsFrom(nsStyleContent* aContent, const nsStyleContent* aOther)
{
uint32_t count = aOther->CounterIncrementCount();
aContent->AllocateCounterIncrements(count);
for (uint32_t i = 0; i < count; ++i) {
const nsStyleCounterData& data = aOther->CounterIncrementAt(i);
aContent->SetCounterIncrementAt(i, data.mCounter, data.mValue);
}
}
void
Gecko_ClearAndResizeCounterResets(nsStyleContent* aContent, uint32_t aHowMany)
{
aContent->AllocateCounterResets(aHowMany);
}
void
Gecko_CopyCounterResetsFrom(nsStyleContent* aContent, const nsStyleContent* aOther)
{
uint32_t count = aOther->CounterResetCount();
aContent->AllocateCounterResets(count);
for (uint32_t i = 0; i < count; ++i) {
const nsStyleCounterData& data = aOther->CounterResetAt(i);
aContent->SetCounterResetAt(i, data.mCounter, data.mValue);
}
}
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_EnsureStyleAnimationArrayLength(void* aArray, size_t aLen)
{
auto base =
static_cast<nsStyleAutoArray<StyleAnimation>*>(aArray);
size_t oldLength = base->Length();
base->EnsureLengthAtLeast(aLen);
for (size_t i = oldLength; i < aLen; ++i) {
(*base)[i].SetInitialValues();
}
}
void
Gecko_EnsureStyleTransitionArrayLength(void* aArray, size_t aLen)
{
auto base =
reinterpret_cast<nsStyleAutoArray<StyleTransition>*>(aArray);
size_t oldLength = base->Length();
base->EnsureLengthAtLeast(aLen);
for (size_t i = oldLength; i < aLen; ++i) {
(*base)[i].SetInitialValues();
}
}
void
Gecko_ClearWillChange(nsStyleDisplay* aDisplay, size_t aLength)
{
aDisplay->mWillChange.Clear();
aDisplay->mWillChange.SetCapacity(aLength);
}
void
Gecko_AppendWillChange(nsStyleDisplay* aDisplay, nsIAtom* aAtom)
{
aDisplay->mWillChange.AppendElement(aAtom);
}
void
Gecko_CopyWillChangeFrom(nsStyleDisplay* aDest, nsStyleDisplay* aSrc)
{
aDest->mWillChange.Clear();
aDest->mWillChange.AppendElements(aSrc->mWillChange);
}
Keyframe*
Gecko_AnimationAppendKeyframe(RawGeckoKeyframeListBorrowedMut aKeyframes,
float aOffset,
const nsTimingFunction* aTimingFunction)
{
Keyframe* keyframe = aKeyframes->AppendElement();
keyframe->mOffset.emplace(aOffset);
if (aTimingFunction &&
aTimingFunction->mType != nsTimingFunction::Type::Linear) {
keyframe->mTimingFunction.emplace();
keyframe->mTimingFunction->Init(*aTimingFunction);
}
return keyframe;
}
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_CopyShapeSourceFrom(mozilla::StyleShapeSource* aDst, const mozilla::StyleShapeSource* aSrc)
{
MOZ_ASSERT(aDst);
MOZ_ASSERT(aSrc);
*aDst = *aSrc;
}
void
Gecko_DestroyShapeSource(mozilla::StyleShapeSource* aShape)
{
aShape->~StyleShapeSource();
}
void
Gecko_StyleShapeSource_SetURLValue(mozilla::StyleShapeSource* aShape, ServoBundledURI aURI)
{
RefPtr<css::URLValue> url = aURI.IntoCssUrl();
aShape->SetURL(url.get());
}
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;
}
void
Gecko_nsStyleFilter_SetURLValue(nsStyleFilter* aEffects, ServoBundledURI aURI)
{
RefPtr<css::URLValue> url = aURI.IntoCssUrl();
aEffects->SetURL(url.get());
}
void
Gecko_nsStyleSVGPaint_CopyFrom(nsStyleSVGPaint* aDest, const nsStyleSVGPaint* aSrc)
{
*aDest = *aSrc;
}
void
Gecko_nsStyleSVGPaint_SetURLValue(nsStyleSVGPaint* aPaint, ServoBundledURI aURI)
{
RefPtr<css::URLValue> url = aURI.IntoCssUrl();
aPaint->SetPaintServer(url.get(), NS_RGB(0, 0, 0));
}
void Gecko_nsStyleSVGPaint_Reset(nsStyleSVGPaint* aPaint)
{
aPaint->SetNone();
}
void
Gecko_nsStyleSVG_SetDashArrayLength(nsStyleSVG* aSvg, uint32_t aLen)
{
aSvg->mStrokeDasharray.Clear();
aSvg->mStrokeDasharray.SetLength(aLen);
}
void
Gecko_nsStyleSVG_CopyDashArray(nsStyleSVG* aDst, const nsStyleSVG* aSrc)
{
aDst->mStrokeDasharray = aSrc->mStrokeDasharray;
}
css::URLValue*
Gecko_NewURLValue(ServoBundledURI aURI)
{
RefPtr<css::URLValue> url = aURI.IntoCssUrl();
return url.forget().take();
}
NS_IMPL_THREADSAFE_FFI_REFCOUNTING(css::URLValue, CSSURLValue);
NS_IMPL_THREADSAFE_FFI_REFCOUNTING(URLExtraData, URLExtraData);
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)
{
MOZ_ASSERT(aCSSValue->GetUnit() == eCSSUnit_Null || aCSSValue->IsLengthUnit());
// The call below could trigger refcounting if aCSSValue were a
// FontFamilyList, but we just asserted that it's not. So we can
// whitelist this for static analysis.
aCSSValue->SetIntegerCoordValue(aLen);
}
nscoord
Gecko_CSSValue_GetAbsoluteLength(nsCSSValueBorrowed aCSSValue)
{
// SetIntegerCoordValue() which is used in Gecko_CSSValue_SetAbsoluteLength()
// converts values by nsPresContext::AppUnitsToFloatCSSPixels() and stores
// values in eCSSUnit_Pixel unit. We need to convert the values back to app
// units by GetPixelLength().
MOZ_ASSERT(aCSSValue->GetUnit() == eCSSUnit_Pixel,
"The unit should be eCSSUnit_Pixel");
return aCSSValue->GetPixelLength();
}
void
Gecko_CSSValue_SetNormal(nsCSSValueBorrowedMut aCSSValue)
{
aCSSValue->SetNormalValue();
}
void
Gecko_CSSValue_SetNumber(nsCSSValueBorrowedMut aCSSValue, float aNumber)
{
aCSSValue->SetFloatValue(aNumber, eCSSUnit_Number);
}
float
Gecko_CSSValue_GetNumber(nsCSSValueBorrowed aCSSValue)
{
return aCSSValue->GetFloatValue();
}
void
Gecko_CSSValue_SetKeyword(nsCSSValueBorrowedMut aCSSValue, nsCSSKeyword aKeyword)
{
aCSSValue->SetEnumValue(aKeyword);
}
nsCSSKeyword
Gecko_CSSValue_GetKeyword(nsCSSValueBorrowed aCSSValue)
{
return aCSSValue->GetKeywordValue();
}
void
Gecko_CSSValue_SetPercentage(nsCSSValueBorrowedMut aCSSValue, float aPercent)
{
aCSSValue->SetPercentValue(aPercent);
}
float
Gecko_CSSValue_GetPercentage(nsCSSValueBorrowed aCSSValue)
{
return aCSSValue->GetPercentValue();
}
void
Gecko_CSSValue_SetAngle(nsCSSValueBorrowedMut aCSSValue, float aRadians)
{
aCSSValue->SetFloatValue(aRadians, eCSSUnit_Radian);
}
float
Gecko_CSSValue_GetAngle(nsCSSValueBorrowed aCSSValue)
{
// Unfortunately nsCSSValue.GetAngleValueInRadians() returns double,
// so we use GetAngleValue() instead.
MOZ_ASSERT(aCSSValue->GetUnit() == eCSSUnit_Radian,
"The unit should be eCSSUnit_Radian");
return aCSSValue->GetAngleValue();
}
void
Gecko_CSSValue_SetCalc(nsCSSValueBorrowedMut aCSSValue, nsStyleCoord::CalcValue aCalc)
{
aCSSValue->SetCalcValue(&aCalc);
}
nsStyleCoord::CalcValue
Gecko_CSSValue_GetCalc(nsCSSValueBorrowed aCSSValue)
{
return aCSSValue->GetCalcValue();
}
void
Gecko_CSSValue_SetFunction(nsCSSValueBorrowedMut aCSSValue, int32_t aLen)
{
nsCSSValue::Array* arr = nsCSSValue::Array::Create(aLen);
aCSSValue->SetArrayValue(arr, eCSSUnit_Function);
}
void
Gecko_CSSValue_SetString(nsCSSValueBorrowedMut aCSSValue,
const uint8_t* aString, uint32_t aLength,
nsCSSUnit aUnit)
{
MOZ_ASSERT(aCSSValue->GetUnit() == eCSSUnit_Null);
nsString string;
nsDependentCSubstring slice(reinterpret_cast<const char*>(aString),
aLength);
AppendUTF8toUTF16(slice, string);
aCSSValue->SetStringValue(string, aUnit);
}
void
Gecko_CSSValue_SetStringFromAtom(nsCSSValueBorrowedMut aCSSValue,
nsIAtom* aAtom, nsCSSUnit aUnit)
{
aCSSValue->SetStringValue(nsDependentAtomString(aAtom), aUnit);
}
void
Gecko_CSSValue_SetArray(nsCSSValueBorrowedMut aCSSValue, int32_t aLength)
{
MOZ_ASSERT(aCSSValue->GetUnit() == eCSSUnit_Null);
RefPtr<nsCSSValue::Array> array
= nsCSSValue::Array::Create(aLength);
aCSSValue->SetArrayValue(array, eCSSUnit_Array);
}
void
Gecko_CSSValue_SetURL(nsCSSValueBorrowedMut aCSSValue,
ServoBundledURI aURI)
{
MOZ_ASSERT(aCSSValue->GetUnit() == eCSSUnit_Null);
RefPtr<css::URLValue> url = aURI.IntoCssUrl();
aCSSValue->SetURLValue(url.get());
}
void
Gecko_CSSValue_SetInt(nsCSSValueBorrowedMut aCSSValue,
int32_t aInteger, nsCSSUnit aUnit)
{
aCSSValue->SetIntValue(aInteger, aUnit);
}
nsCSSValueBorrowedMut
Gecko_CSSValue_GetArrayItem(nsCSSValueBorrowedMut aCSSValue, int32_t aIndex)
{
return &aCSSValue->GetArrayValue()->Item(aIndex);
}
nsCSSValueBorrowed
Gecko_CSSValue_GetArrayItemConst(nsCSSValueBorrowed aCSSValue, int32_t aIndex)
{
return &aCSSValue->GetArrayValue()->Item(aIndex);
}
bool
Gecko_PropertyId_IsPrefEnabled(nsCSSPropertyID id)
{
return nsCSSProps::IsEnabled(id);
}
void
Gecko_CSSValue_Drop(nsCSSValueBorrowedMut aCSSValue)
{
aCSSValue->~nsCSSValue();
}
void
Gecko_nsStyleFont_SetLang(nsStyleFont* aFont, nsIAtom* aAtom)
{
already_AddRefed<nsIAtom> atom = already_AddRefed<nsIAtom>(aAtom);
aFont->mLanguage = atom;
aFont->mExplicitLanguage = true;
}
void
Gecko_nsStyleFont_CopyLangFrom(nsStyleFont* aFont, const nsStyleFont* aSource)
{
aFont->mLanguage = aSource->mLanguage;
}
void
FontSizePrefs::CopyFrom(const LangGroupFontPrefs& prefs)
{
mDefaultVariableSize = prefs.mDefaultVariableFont.size;
mDefaultFixedSize = prefs.mDefaultFixedFont.size;
mDefaultSerifSize = prefs.mDefaultSerifFont.size;
mDefaultSansSerifSize = prefs.mDefaultSansSerifFont.size;
mDefaultMonospaceSize = prefs.mDefaultMonospaceFont.size;
mDefaultCursiveSize = prefs.mDefaultCursiveFont.size;
mDefaultFantasySize = prefs.mDefaultFantasyFont.size;
}
FontSizePrefs
Gecko_GetBaseSize(nsIAtom* aLanguage)
{
LangGroupFontPrefs prefs;
nsCOMPtr<nsIAtom> langGroupAtom = StaticPresData::Get()->GetUncachedLangGroup(aLanguage);
prefs.Initialize(langGroupAtom);
FontSizePrefs sizes;
sizes.CopyFrom(prefs);
return sizes;
}
void
InitializeServo()
{
URLExtraData::InitDummy();
Servo_Initialize(URLExtraData::Dummy());
sServoFontMetricsLock = new Mutex("Gecko_GetFontMetrics");
}
void
ShutdownServo()
{
delete sServoFontMetricsLock;
Servo_Shutdown();
}
GeckoFontMetrics
Gecko_GetFontMetrics(RawGeckoPresContextBorrowed aPresContext,
bool aIsVertical,
const nsStyleFont* aFont,
nscoord aFontSize,
bool aUseUserFontSet)
{
// This function is still unsafe due to frobbing DOM and network
// off main thread. We currently disable it in Servo, see bug 1356105
MOZ_ASSERT(NS_IsMainThread());
MutexAutoLock lock(*sServoFontMetricsLock);
GeckoFontMetrics ret;
// Safe because we are locked, and this function is only
// ever called from Servo parallel traversal or the main thread
nsPresContext* presContext = const_cast<nsPresContext*>(aPresContext);
presContext->SetUsesExChUnits(true);
RefPtr<nsFontMetrics> fm = nsRuleNode::GetMetricsFor(presContext, aIsVertical,
aFont, aFontSize,
aUseUserFontSet);
ret.mXSize = fm->XHeight();
gfxFloat zeroWidth = fm->GetThebesFontGroup()->GetFirstValidFont()->
GetMetrics(fm->Orientation()).zeroOrAveCharWidth;
ret.mChSize = ceil(aPresContext->AppUnitsPerDevPixel() * zeroWidth);
return ret;
}
void
Gecko_LoadStyleSheet(css::Loader* aLoader,
ServoStyleSheet* aParent,
RawServoStyleSheetBorrowed aChildSheet,
RawGeckoURLExtraData* aBaseURLData,
const uint8_t* aURLString,
uint32_t aURLStringLength,
RawServoMediaListStrong aMediaList)
{
MOZ_ASSERT(NS_IsMainThread());
MOZ_ASSERT(aLoader, "Should've catched this before");
MOZ_ASSERT(aParent, "Only used for @import, so parent should exist!");
MOZ_ASSERT(aURLString, "Invalid URLs shouldn't be loaded!");
MOZ_ASSERT(aBaseURLData, "Need base URL data");
RefPtr<dom::MediaList> media = new ServoMediaList(aMediaList.Consume());
nsDependentCSubstring urlSpec(reinterpret_cast<const char*>(aURLString),
aURLStringLength);
nsCOMPtr<nsIURI> uri;
nsresult rv = NS_NewURI(getter_AddRefs(uri), urlSpec, nullptr,
aBaseURLData->BaseURI());
if (NS_FAILED(rv)) {
// Servo and Gecko have different ideas of what a valid URL is, so we might
// get in here with a URL string that NS_NewURI can't handle. If so,
// silently do nothing. Eventually we should be able to assert that the
// NS_NewURI succeeds, here.
return;
}
aLoader->LoadChildSheet(aParent, uri, media, nullptr, aChildSheet, nullptr);
}
const nsMediaFeature*
Gecko_GetMediaFeatures()
{
return nsMediaFeatures::features;
}
nsCSSKeyword
Gecko_LookupCSSKeyword(const uint8_t* aString, uint32_t aLength)
{
MOZ_ASSERT(NS_IsMainThread());
nsDependentCSubstring keyword(reinterpret_cast<const char*>(aString), aLength);
return nsCSSKeywords::LookupKeyword(keyword);
}
const char*
Gecko_CSSKeywordString(nsCSSKeyword aKeyword, uint32_t* aLength)
{
MOZ_ASSERT(NS_IsMainThread());
MOZ_ASSERT(aLength);
const nsAFlatCString& value = nsCSSKeywords::GetStringValue(aKeyword);
*aLength = value.Length();
return value.get();
}
nsCSSFontFaceRule*
Gecko_CSSFontFaceRule_Create()
{
RefPtr<nsCSSFontFaceRule> rule = new nsCSSFontFaceRule(0, 0);
return rule.forget().take();
}
void
Gecko_CSSFontFaceRule_GetCssText(const nsCSSFontFaceRule* aRule,
nsAString* aResult)
{
// GetCSSText serializes nsCSSValues, which have a heap write
// hazard when dealing with color values (nsCSSKeywords::AddRefTable)
// We only serialize on the main thread; assert to convince the analysis
// and prevent accidentally calling this elsewhere
MOZ_ASSERT(NS_IsMainThread());
aRule->GetCssText(*aResult);
}
NS_IMPL_FFI_REFCOUNTING(nsCSSFontFaceRule, CSSFontFaceRule);
NS_IMPL_THREADSAFE_FFI_REFCOUNTING(nsCSSValueSharedList, CSSValueSharedList);
#define STYLE_STRUCT(name, checkdata_cb) \
\
void \
Gecko_Construct_Default_nsStyle##name(nsStyle##name* ptr, \
const nsPresContext* pres_context) \
{ \
new (ptr) nsStyle##name(pres_context); \
} \
\
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(); \
}
void
Gecko_Construct_nsStyleVariables(nsStyleVariables* ptr)
{
new (ptr) nsStyleVariables();
}
void
Gecko_RegisterProfilerThread(const char* name)
{
char stackTop;
profiler_register_thread(name, &stackTop);
}
void
Gecko_UnregisterProfilerThread()
{
profiler_unregister_thread();
}
#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
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