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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
#include "mozilla/ServoStyleSet.h"
#include "mozilla/ServoStyleSetInlines.h"
#include "gfxPlatformFontList.h"
#include "mozilla/DocumentStyleRootIterator.h"
#include "mozilla/AttributeStyles.h"
#include "mozilla/EffectCompositor.h"
#include "mozilla/IntegerRange.h"
#include "mozilla/Keyframe.h"
#include "mozilla/LookAndFeel.h"
#include "mozilla/PresShell.h"
#include "mozilla/ProfilerLabels.h"
#include "mozilla/ServoBindings.h"
#include "mozilla/RestyleManager.h"
#include "mozilla/ServoStyleRuleMap.h"
#include "mozilla/ServoTypes.h"
#include "mozilla/SMILAnimationController.h"
#include "mozilla/MediaFeatureChange.h"
#include "mozilla/StyleAnimationValue.h"
#include "mozilla/css/Loader.h"
#include "mozilla/dom/AnonymousContent.h"
#include "mozilla/dom/CSSBinding.h"
#include "mozilla/dom/CSSCounterStyleRule.h"
#include "mozilla/dom/CSSFontFaceRule.h"
#include "mozilla/dom/CSSFontFeatureValuesRule.h"
#include "mozilla/dom/CSSFontPaletteValuesRule.h"
#include "mozilla/dom/CSSImportRule.h"
#include "mozilla/dom/CSSContainerRule.h"
#include "mozilla/dom/CSSLayerBlockRule.h"
#include "mozilla/dom/CSSLayerStatementRule.h"
#include "mozilla/dom/CSSMarginRule.h"
#include "mozilla/dom/CSSMediaRule.h"
#include "mozilla/dom/CSSMozDocumentRule.h"
#include "mozilla/dom/CSSKeyframesRule.h"
#include "mozilla/dom/CSSKeyframeRule.h"
#include "mozilla/dom/CSSNamespaceRule.h"
#include "mozilla/dom/CSSPageRule.h"
#include "mozilla/dom/CSSPropertyRule.h"
#include "mozilla/dom/CSSScopeRule.h"
#include "mozilla/dom/CSSSupportsRule.h"
#include "mozilla/dom/CSSStartingStyleRule.h"
#include "mozilla/dom/FontFaceSet.h"
#include "mozilla/dom/Element.h"
#include "mozilla/dom/ElementInlines.h"
#include "nsCSSAnonBoxes.h"
#include "nsCSSFrameConstructor.h"
#include "nsCSSPseudoElements.h"
#include "nsDeviceContext.h"
#include "nsIAnonymousContentCreator.h"
#include "nsLayoutUtils.h"
#include "mozilla/dom/DocumentInlines.h"
#include "nsPrintfCString.h"
#include "gfxUserFontSet.h"
#include "nsWindowSizes.h"
namespace mozilla {
using namespace dom;
#ifdef DEBUG
bool ServoStyleSet::IsCurrentThreadInServoTraversal() {
return sInServoTraversal && (NS_IsMainThread() || Servo_IsWorkerThread());
}
#endif
// The definition of kOrigins relies on this.
static_assert(static_cast<uint8_t>(StyleOrigin::UserAgent) ==
static_cast<uint8_t>(OriginFlags::UserAgent));
static_assert(static_cast<uint8_t>(StyleOrigin::User) ==
static_cast<uint8_t>(OriginFlags::User));
static_assert(static_cast<uint8_t>(StyleOrigin::Author) ==
static_cast<uint8_t>(OriginFlags::Author));
constexpr const StyleOrigin ServoStyleSet::kOrigins[];
ServoStyleSet* sInServoTraversal = nullptr;
// On construction, sets sInServoTraversal to the given ServoStyleSet.
// On destruction, clears sInServoTraversal and calls RunPostTraversalTasks.
class MOZ_RAII AutoSetInServoTraversal {
public:
explicit AutoSetInServoTraversal(ServoStyleSet* aSet) : mSet(aSet) {
MOZ_ASSERT(!sInServoTraversal);
MOZ_ASSERT(aSet);
sInServoTraversal = aSet;
}
~AutoSetInServoTraversal() {
MOZ_ASSERT(sInServoTraversal);
sInServoTraversal = nullptr;
mSet->RunPostTraversalTasks();
}
private:
ServoStyleSet* mSet;
};
// Sets up for one or more calls to Servo_TraverseSubtree.
class MOZ_RAII AutoPrepareTraversal {
public:
explicit AutoPrepareTraversal(ServoStyleSet* aSet)
: mSetInServoTraversal(aSet) {
MOZ_ASSERT(!aSet->StylistNeedsUpdate());
}
private:
AutoSetInServoTraversal mSetInServoTraversal;
};
ServoStyleSet::ServoStyleSet(Document& aDocument) : mDocument(&aDocument) {
PreferenceSheet::EnsureInitialized();
PodArrayZero(mCachedAnonymousContentStyleIndexes);
mRawData.reset(Servo_StyleSet_Init(&aDocument));
}
ServoStyleSet::~ServoStyleSet() {
MOZ_ASSERT(!IsInServoTraversal());
EnumerateStyleSheets([&](StyleSheet& aSheet) { aSheet.DropStyleSet(this); });
}
nsPresContext* ServoStyleSet::GetPresContext() {
return mDocument->GetPresContext();
}
template <typename Functor>
static void EnumerateShadowRoots(const Document& aDoc, const Functor& aCb) {
const Document::ShadowRootSet& shadowRoots = aDoc.ComposedShadowRoots();
for (ShadowRoot* root : shadowRoots) {
MOZ_ASSERT(root);
MOZ_DIAGNOSTIC_ASSERT(root->IsInComposedDoc());
aCb(*root);
}
}
void ServoStyleSet::ShellDetachedFromDocument() {
ClearNonInheritingComputedStyles();
mCachedAnonymousContentStyles.Clear();
PodArrayZero(mCachedAnonymousContentStyleIndexes);
mStyleRuleMap = nullptr;
// Remove all our stylesheets...
for (auto origin : kOrigins) {
for (size_t count = SheetCount(origin); count--;) {
RemoveStyleSheet(*SheetAt(origin, count));
}
}
// And remove all the CascadeDatas from memory.
UpdateStylistIfNeeded();
// Also GC the ruletree if it got big now that the DOM no longer has
// references to styles around anymore.
MaybeGCRuleTree();
}
void ServoStyleSet::RecordShadowStyleChange(ShadowRoot& aShadowRoot) {
// TODO(emilio): We could keep track of the actual shadow roots that need
// their styles recomputed.
SetStylistShadowDOMStyleSheetsDirty();
// FIXME(emilio): This should be done using stylesheet invalidation instead.
if (nsPresContext* pc = GetPresContext()) {
pc->RestyleManager()->PostRestyleEvent(
aShadowRoot.Host(), RestyleHint::RestyleSubtree(), nsChangeHint(0));
}
}
void ServoStyleSet::InvalidateStyleForDocumentStateChanges(
DocumentState aStatesChanged) {
MOZ_ASSERT(mDocument);
MOZ_ASSERT(!aStatesChanged.IsEmpty());
nsPresContext* pc = GetPresContext();
if (!pc) {
return;
}
Element* root = mDocument->GetRootElement();
if (!root) {
return;
}
// TODO(emilio): It may be nicer to just invalidate stuff in a given subtree
// for Shadow DOM. Consider just enumerating shadow roots instead and run
// invalidation individually, passing mRawData for the UA / User sheets.
AutoTArray<const StyleAuthorStyles*, 20> nonDocumentStyles;
EnumerateShadowRoots(*mDocument, [&](ShadowRoot& aShadowRoot) {
if (auto* authorStyles = aShadowRoot.GetServoStyles()) {
nonDocumentStyles.AppendElement(authorStyles);
}
});
Servo_InvalidateStyleForDocStateChanges(root, mRawData.get(),
&nonDocumentStyles,
aStatesChanged.GetInternalValue());
}
static const MediaFeatureChangeReason kMediaFeaturesAffectingDefaultStyle =
// Zoom changes change the meaning of em units.
MediaFeatureChangeReason::ZoomChange |
// A resolution change changes the app-units-per-dev-pixels ratio, which
// some structs (Border, Outline, Column) store for clamping. We should
// arguably not do that, maybe doing it on layout directly, to try to avoid
MediaFeatureChangeReason::ResolutionChange;
RestyleHint ServoStyleSet::MediumFeaturesChanged(
MediaFeatureChangeReason aReason) {
AutoTArray<StyleAuthorStyles*, 20> nonDocumentStyles;
EnumerateShadowRoots(*mDocument, [&](ShadowRoot& aShadowRoot) {
if (auto* authorStyles = aShadowRoot.GetServoStyles()) {
nonDocumentStyles.AppendElement(authorStyles);
}
});
const bool mayAffectDefaultStyle =
bool(aReason & kMediaFeaturesAffectingDefaultStyle);
const MediumFeaturesChangedResult result =
Servo_StyleSet_MediumFeaturesChanged(mRawData.get(), &nonDocumentStyles,
mayAffectDefaultStyle);
const bool viewportChanged =
bool(aReason & MediaFeatureChangeReason::ViewportChange);
if (viewportChanged) {
InvalidateForViewportUnits(OnlyDynamic::No);
}
const bool rulesChanged =
result.mAffectsDocumentRules || result.mAffectsNonDocumentRules;
if (result.mAffectsDocumentRules) {
SetStylistStyleSheetsDirty();
}
if (result.mAffectsNonDocumentRules) {
SetStylistShadowDOMStyleSheetsDirty();
}
if (rulesChanged) {
// TODO(emilio): This could be more granular.
return RestyleHint::RestyleSubtree();
}
return RestyleHint{0};
}
MOZ_DEFINE_MALLOC_SIZE_OF(ServoStyleSetMallocSizeOf)
MOZ_DEFINE_MALLOC_ENCLOSING_SIZE_OF(ServoStyleSetMallocEnclosingSizeOf)
void ServoStyleSet::AddSizeOfIncludingThis(nsWindowSizes& aSizes) const {
MallocSizeOf mallocSizeOf = aSizes.mState.mMallocSizeOf;
aSizes.mLayoutStyleSetsOther += mallocSizeOf(this);
if (mRawData) {
aSizes.mLayoutStyleSetsOther += mallocSizeOf(mRawData.get());
ServoStyleSetSizes sizes;
// Measure mRawData. We use ServoStyleSetMallocSizeOf rather than
// aMallocSizeOf to distinguish in DMD's output the memory measured within
// Servo code.
Servo_StyleSet_AddSizeOfExcludingThis(ServoStyleSetMallocSizeOf,
ServoStyleSetMallocEnclosingSizeOf,
&sizes, mRawData.get());
// The StyleSet does not contain precomputed pseudos; they are in the UA
// cache.
MOZ_RELEASE_ASSERT(sizes.mPrecomputedPseudos == 0);
aSizes.mLayoutStyleSetsStylistRuleTree += sizes.mRuleTree;
aSizes.mLayoutStyleSetsStylistElementAndPseudosMaps +=
sizes.mElementAndPseudosMaps;
aSizes.mLayoutStyleSetsStylistInvalidationMap += sizes.mInvalidationMap;
aSizes.mLayoutStyleSetsStylistRevalidationSelectors +=
sizes.mRevalidationSelectors;
aSizes.mLayoutStyleSetsStylistOther += sizes.mOther;
}
if (mStyleRuleMap) {
aSizes.mLayoutStyleSetsOther +=
mStyleRuleMap->SizeOfIncludingThis(aSizes.mState.mMallocSizeOf);
}
// Measurement of the following members may be added later if DMD finds it is
// worthwhile:
// - mSheets
// - mNonInheritingComputedStyles
//
// The following members are not measured:
// - mDocument, because it a non-owning pointer
}
void ServoStyleSet::SetAuthorStyleDisabled(bool aStyleDisabled) {
if (mAuthorStyleDisabled == aStyleDisabled) {
return;
}
mAuthorStyleDisabled = aStyleDisabled;
if (Element* root = mDocument->GetRootElement()) {
if (nsPresContext* pc = GetPresContext()) {
pc->RestyleManager()->PostRestyleEvent(
root, RestyleHint::RestyleSubtree(), nsChangeHint(0));
}
}
Servo_StyleSet_SetAuthorStyleDisabled(mRawData.get(), mAuthorStyleDisabled);
SetStylistStyleSheetsDirty();
}
const ServoElementSnapshotTable& ServoStyleSet::Snapshots() {
MOZ_ASSERT(GetPresContext(), "Styling a document without a shell?");
return GetPresContext()->RestyleManager()->Snapshots();
}
void ServoStyleSet::PreTraverseSync() {
// Get the Document's root element to ensure that the cache is valid before
// calling into the (potentially-parallel) Servo traversal, where a cache hit
// is necessary to avoid a data race when updating the cache.
Unused << mDocument->GetRootElement();
// FIXME(emilio): These two shouldn't be needed in theory, the call to the
// same function in PresShell should do the work, but as it turns out we
// ProcessPendingRestyles() twice, and runnables from frames just constructed
// can end up doing editing stuff, which adds stylesheets etc...
mDocument->FlushUserFontSet();
UpdateStylistIfNeeded();
mDocument->ResolveScheduledPresAttrs();
LookAndFeel::NativeInit();
mDocument->CacheAllKnownLangPrefs();
if (gfxUserFontSet* userFontSet = mDocument->GetUserFontSet()) {
nsPresContext* presContext = GetPresContext();
MOZ_ASSERT(presContext,
"For now, we don't call into here without a pres context");
// Ensure that the @font-face data is not stale
uint64_t generation = userFontSet->GetGeneration();
if (generation != mUserFontSetUpdateGeneration) {
mDocument->GetFonts()->CacheFontLoadability();
presContext->UpdateFontCacheUserFonts(userFontSet);
mUserFontSetUpdateGeneration = generation;
}
}
MOZ_ASSERT(!StylistNeedsUpdate());
}
void ServoStyleSet::PreTraverse(ServoTraversalFlags aFlags, Element* aRoot) {
PreTraverseSync();
// Process animation stuff that we should avoid doing during the parallel
// traversal.
SMILAnimationController* smilController =
mDocument->HasAnimationController() ? mDocument->GetAnimationController()
: nullptr;
MOZ_ASSERT(GetPresContext());
if (aRoot) {
GetPresContext()->EffectCompositor()->PreTraverseInSubtree(aFlags, aRoot);
if (smilController) {
smilController->PreTraverseInSubtree(aRoot);
}
} else {
GetPresContext()->EffectCompositor()->PreTraverse(aFlags);
if (smilController) {
smilController->PreTraverse();
}
}
}
static inline already_AddRefed<ComputedStyle>
ResolveStyleForTextOrFirstLetterContinuation(
const StylePerDocumentStyleData* aRawData, ComputedStyle& aParent,
PseudoStyleType aType) {
MOZ_ASSERT(aType == PseudoStyleType::mozText ||
aType == PseudoStyleType::firstLetterContinuation);
auto inheritTarget = aType == PseudoStyleType::mozText
? InheritTarget::Text
: InheritTarget::FirstLetterContinuation;
RefPtr<ComputedStyle> style = aParent.GetCachedInheritingAnonBoxStyle(aType);
if (!style) {
style =
Servo_ComputedValues_Inherit(aRawData, aType, &aParent, inheritTarget)
.Consume();
MOZ_ASSERT(style);
aParent.SetCachedInheritedAnonBoxStyle(style);
}
return style.forget();
}
already_AddRefed<ComputedStyle> ServoStyleSet::ResolveStyleForText(
nsIContent* aTextNode, ComputedStyle* aParentStyle) {
MOZ_ASSERT(aTextNode && aTextNode->IsText());
MOZ_ASSERT(aTextNode->GetParent());
MOZ_ASSERT(aParentStyle);
return ResolveStyleForTextOrFirstLetterContinuation(
mRawData.get(), *aParentStyle, PseudoStyleType::mozText);
}
already_AddRefed<ComputedStyle>
ServoStyleSet::ResolveStyleForFirstLetterContinuation(
ComputedStyle* aParentStyle) {
MOZ_ASSERT(aParentStyle);
return ResolveStyleForTextOrFirstLetterContinuation(
mRawData.get(), *aParentStyle, PseudoStyleType::firstLetterContinuation);
}
already_AddRefed<ComputedStyle> ServoStyleSet::ResolveStyleForPlaceholder() {
RefPtr<ComputedStyle>& cache = mNonInheritingComputedStyles
[nsCSSAnonBoxes::NonInheriting::oofPlaceholder];
if (cache) {
RefPtr<ComputedStyle> retval = cache;
return retval.forget();
}
RefPtr<ComputedStyle> computedValues =
Servo_ComputedValues_Inherit(mRawData.get(),
PseudoStyleType::oofPlaceholder, nullptr,
InheritTarget::PlaceholderFrame)
.Consume();
MOZ_ASSERT(computedValues);
cache = computedValues;
return computedValues.forget();
}
static inline bool LazyPseudoIsCacheable(PseudoStyleType aType,
const Element& aOriginatingElement,
ComputedStyle* aParentStyle) {
return aParentStyle &&
!nsCSSPseudoElements::IsEagerlyCascadedInServo(aType) &&
aOriginatingElement.HasServoData() &&
!Servo_Element_IsPrimaryStyleReusedViaRuleNode(&aOriginatingElement);
}
already_AddRefed<ComputedStyle> ServoStyleSet::ResolvePseudoElementStyle(
const Element& aOriginatingElement, PseudoStyleType aType,
nsAtom* aFunctionalPseudoParameter, ComputedStyle* aParentStyle,
IsProbe aIsProbe) {
// Runs from frame construction, this should have clean styles already, except
// with non-lazy FC...
UpdateStylistIfNeeded();
MOZ_ASSERT(PseudoStyle::IsPseudoElement(aType));
// caching is done using `aType` only, therefore results would be wrong for
// pseudos with functional parameters (e.g. `::highlight(foo)`).
const bool cacheable =
!aFunctionalPseudoParameter &&
LazyPseudoIsCacheable(aType, aOriginatingElement, aParentStyle);
RefPtr<ComputedStyle> style =
cacheable ? aParentStyle->GetCachedLazyPseudoStyle(aType) : nullptr;
const bool isProbe = aIsProbe == IsProbe::Yes;
if (!style) {
// FIXME(emilio): Why passing null for probing as the parent style?
//
// There are callers which do pass the wrong parent style and it would
// assert (like ComputeSelectionStyle()). That's messy!
style = Servo_ResolvePseudoStyle(
&aOriginatingElement, aType, aFunctionalPseudoParameter,
isProbe, isProbe ? nullptr : aParentStyle, mRawData.get())
.Consume();
if (!style) {
MOZ_ASSERT(isProbe);
return nullptr;
}
if (cacheable) {
aParentStyle->SetCachedLazyPseudoStyle(style);
}
}
MOZ_ASSERT(style);
if (isProbe && !GeneratedContentPseudoExists(*aParentStyle, *style)) {
return nullptr;
}
return style.forget();
}
already_AddRefed<ComputedStyle>
ServoStyleSet::ResolveInheritingAnonymousBoxStyle(PseudoStyleType aType,
ComputedStyle* aParentStyle) {
MOZ_ASSERT(PseudoStyle::IsInheritingAnonBox(aType));
MOZ_ASSERT_IF(aParentStyle, !StylistNeedsUpdate());
UpdateStylistIfNeeded();
RefPtr<ComputedStyle> style = nullptr;
if (aParentStyle) {
style = aParentStyle->GetCachedInheritingAnonBoxStyle(aType);
}
if (!style) {
style = Servo_ComputedValues_GetForAnonymousBox(aParentStyle, aType,
mRawData.get())
.Consume();
MOZ_ASSERT(style);
if (aParentStyle) {
aParentStyle->SetCachedInheritedAnonBoxStyle(style);
}
}
return style.forget();
}
already_AddRefed<ComputedStyle>
ServoStyleSet::ResolveNonInheritingAnonymousBoxStyle(PseudoStyleType aType) {
MOZ_ASSERT(aType != PseudoStyleType::pageContent,
"Use ResolvePageContentStyle for page content");
MOZ_ASSERT(PseudoStyle::IsNonInheritingAnonBox(aType));
nsCSSAnonBoxes::NonInheriting type =
nsCSSAnonBoxes::NonInheritingTypeForPseudoType(aType);
RefPtr<ComputedStyle>& cache = mNonInheritingComputedStyles[type];
if (cache) {
RefPtr<ComputedStyle> retval = cache;
return retval.forget();
}
UpdateStylistIfNeeded();
// We always want to skip parent-based display fixup here. It never makes
// sense for non-inheriting anonymous boxes. (Static assertions in
// nsCSSAnonBoxes.cpp ensure that all non-inheriting non-anonymous boxes
// are indeed annotated as skipping this fixup.)
MOZ_ASSERT(!PseudoStyle::IsNonInheritingAnonBox(PseudoStyleType::viewport),
"viewport needs fixup to handle blockifying it");
RefPtr<ComputedStyle> computedValues =
Servo_ComputedValues_GetForAnonymousBox(nullptr, aType, mRawData.get())
.Consume();
MOZ_ASSERT(computedValues);
cache = computedValues;
return computedValues.forget();
}
already_AddRefed<ComputedStyle> ServoStyleSet::ResolvePageContentStyle(
const nsAtom* aPageName, const StylePagePseudoClassFlags& aPseudo) {
// The empty atom is used to indicate no specified page name, and is not
// usable as a page-rule selector. Changing this to null is a slight
// optimization to avoid the Servo code from doing an unnecessary hashtable
// lookup, and still use the style cache in this case.
if (aPageName == nsGkAtoms::_empty) {
aPageName = nullptr;
}
// Only use the cache when we are doing a lookup for page styles without a
// page-name or any pseudo classes.
const bool useCache = !aPageName && !aPseudo;
RefPtr<ComputedStyle>& cache =
mNonInheritingComputedStyles[nsCSSAnonBoxes::NonInheriting::pageContent];
if (useCache && cache) {
RefPtr<ComputedStyle> retval = cache;
return retval.forget();
}
UpdateStylistIfNeeded();
RefPtr<ComputedStyle> computedValues =
Servo_ComputedValues_GetForPageContent(mRawData.get(), aPageName, aPseudo)
.Consume();
MOZ_ASSERT(computedValues);
if (useCache) {
cache = computedValues;
}
return computedValues.forget();
}
already_AddRefed<ComputedStyle> ServoStyleSet::ResolveXULTreePseudoStyle(
dom::Element* aParentElement, nsCSSAnonBoxPseudoStaticAtom* aPseudoTag,
ComputedStyle* aParentStyle, const AtomArray& aInputWord) {
MOZ_ASSERT(nsCSSAnonBoxes::IsTreePseudoElement(aPseudoTag));
MOZ_ASSERT(aParentStyle);
NS_ASSERTION(!StylistNeedsUpdate(),
"Stylesheets modified when resolving XUL tree pseudo");
return Servo_ComputedValues_ResolveXULTreePseudoStyle(
aParentElement, aPseudoTag, aParentStyle, &aInputWord,
mRawData.get())
.Consume();
}
// manage the set of style sheets in the style set
void ServoStyleSet::AppendStyleSheet(StyleSheet& aSheet) {
MOZ_ASSERT(aSheet.IsApplicable());
MOZ_ASSERT(aSheet.RawContents(),
"Raw sheet should be in place before insertion.");
aSheet.AddStyleSet(this);
// Maintain a mirrored list of sheets on the servo side.
// Servo will remove aSheet from its original position as part of the call
// to Servo_StyleSet_AppendStyleSheet.
Servo_StyleSet_AppendStyleSheet(mRawData.get(), &aSheet);
SetStylistStyleSheetsDirty();
if (mStyleRuleMap) {
mStyleRuleMap->SheetAdded(aSheet);
}
}
void ServoStyleSet::RemoveStyleSheet(StyleSheet& aSheet) {
aSheet.DropStyleSet(this);
// Maintain a mirrored list of sheets on the servo side.
Servo_StyleSet_RemoveStyleSheet(mRawData.get(), &aSheet);
SetStylistStyleSheetsDirty();
if (mStyleRuleMap) {
mStyleRuleMap->SheetRemoved(aSheet);
}
}
void ServoStyleSet::InsertStyleSheetBefore(StyleSheet& aNewSheet,
StyleSheet& aReferenceSheet) {
MOZ_ASSERT(aNewSheet.IsApplicable());
MOZ_ASSERT(aReferenceSheet.IsApplicable());
MOZ_ASSERT(&aNewSheet != &aReferenceSheet,
"Can't place sheet before itself.");
MOZ_ASSERT(aNewSheet.GetOrigin() == aReferenceSheet.GetOrigin(),
"Sheets should be in the same origin");
MOZ_ASSERT(aNewSheet.RawContents(),
"Raw sheet should be in place before insertion.");
MOZ_ASSERT(aReferenceSheet.RawContents(),
"Reference sheet should have a raw sheet.");
// Servo will remove aNewSheet from its original position as part of the
// call to Servo_StyleSet_InsertStyleSheetBefore.
aNewSheet.AddStyleSet(this);
// Maintain a mirrored list of sheets on the servo side.
Servo_StyleSet_InsertStyleSheetBefore(mRawData.get(), &aNewSheet,
&aReferenceSheet);
SetStylistStyleSheetsDirty();
if (mStyleRuleMap) {
mStyleRuleMap->SheetAdded(aNewSheet);
}
}
size_t ServoStyleSet::SheetCount(Origin aOrigin) const {
return Servo_StyleSet_GetSheetCount(mRawData.get(), aOrigin);
}
StyleSheet* ServoStyleSet::SheetAt(Origin aOrigin, size_t aIndex) const {
return const_cast<StyleSheet*>(
Servo_StyleSet_GetSheetAt(mRawData.get(), aOrigin, aIndex));
}
ServoStyleSet::PageSizeAndOrientation
ServoStyleSet::GetDefaultPageSizeAndOrientation() {
PageSizeAndOrientation retval;
const RefPtr<ComputedStyle> style =
ResolvePageContentStyle(nullptr, StylePagePseudoClassFlags::NONE);
const StylePageSize& pageSize = style->StylePage()->mSize;
if (pageSize.IsSize()) {
const nscoord w = pageSize.AsSize().width.ToAppUnits();
const nscoord h = pageSize.AsSize().height.ToAppUnits();
// Ignoring sizes that include a zero width or height.
// These are also ignored in nsPageFrame::ComputePageSize()
// when calculating the scaling for a page size.
// combinations that produce a zero-sized page-content box.
if (w > 0 && h > 0) {
retval.size.emplace(w, h);
if (w > h) {
retval.orientation.emplace(StylePageSizeOrientation::Landscape);
} else if (w < h) {
retval.orientation.emplace(StylePageSizeOrientation::Portrait);
}
}
} else if (pageSize.IsOrientation()) {
retval.orientation.emplace(pageSize.AsOrientation());
} else {
MOZ_ASSERT(pageSize.IsAuto(), "Impossible page size");
}
return retval;
}
void ServoStyleSet::AppendAllNonDocumentAuthorSheets(
nsTArray<StyleSheet*>& aArray) const {
EnumerateShadowRoots(*mDocument, [&](ShadowRoot& aShadowRoot) {
for (auto index : IntegerRange(aShadowRoot.SheetCount())) {
aArray.AppendElement(aShadowRoot.SheetAt(index));
}
aArray.AppendElements(aShadowRoot.AdoptedStyleSheets());
});
}
void ServoStyleSet::AddDocStyleSheet(StyleSheet& aSheet) {
MOZ_ASSERT(aSheet.IsApplicable());
MOZ_ASSERT(aSheet.RawContents(),
"Raw sheet should be in place by this point.");
size_t index = mDocument->FindDocStyleSheetInsertionPoint(aSheet);
aSheet.AddStyleSet(this);
if (index < SheetCount(Origin::Author)) {
// This case is insert before.
StyleSheet* beforeSheet = SheetAt(Origin::Author, index);
// Maintain a mirrored list of sheets on the servo side.
Servo_StyleSet_InsertStyleSheetBefore(mRawData.get(), &aSheet, beforeSheet);
SetStylistStyleSheetsDirty();
} else {
// Maintain a mirrored list of sheets on the servo side.
Servo_StyleSet_AppendStyleSheet(mRawData.get(), &aSheet);
SetStylistStyleSheetsDirty();
}
if (mStyleRuleMap) {
mStyleRuleMap->SheetAdded(aSheet);
}
}
bool ServoStyleSet::GeneratedContentPseudoExists(
const ComputedStyle& aParentStyle, const ComputedStyle& aPseudoStyle) {
auto type = aPseudoStyle.GetPseudoType();
MOZ_ASSERT(type != PseudoStyleType::NotPseudo);
if (type == PseudoStyleType::marker) {
// ::marker only exist for list items (for now).
if (!aParentStyle.StyleDisplay()->IsListItem()) {
return false;
}
const auto& content = aPseudoStyle.StyleContent()->mContent;
// ::marker does not exist if 'content' is 'none' (this trumps
// any 'list-style-type' or 'list-style-image' values).
if (content.IsNone()) {
return false;
}
// ::marker only exist if we have 'content' or at least one of
// 'list-style-type' or 'list-style-image'.
if (aPseudoStyle.StyleList()->mCounterStyle.IsNone() &&
aPseudoStyle.StyleList()->mListStyleImage.IsNone() &&
content.IsNormal()) {
return false;
}
// display:none is equivalent to not having a pseudo at all.
if (aPseudoStyle.StyleDisplay()->mDisplay == StyleDisplay::None) {
return false;
}
}
// For ::before and ::after pseudo-elements, no 'content' items is
// equivalent to not having the pseudo-element at all.
if (type == PseudoStyleType::before || type == PseudoStyleType::after) {
if (!aPseudoStyle.StyleContent()->mContent.IsItems()) {
return false;
}
MOZ_ASSERT(aPseudoStyle.StyleContent()->ContentCount() > 0,
"IsItems() implies we have at least one item");
// display:none is equivalent to not having a pseudo at all.
if (aPseudoStyle.StyleDisplay()->mDisplay == StyleDisplay::None) {
return false;
}
}
return true;
}
bool ServoStyleSet::StyleDocument(ServoTraversalFlags aFlags) {
AUTO_PROFILER_LABEL_CATEGORY_PAIR_RELEVANT_FOR_JS(LAYOUT_StyleComputation);
MOZ_ASSERT(GetPresContext(), "Styling a document without a shell?");
if (!mDocument->GetServoRestyleRoot()) {
return false;
}
Element* rootElement = mDocument->GetRootElement();
if (rootElement && MOZ_UNLIKELY(!rootElement->HasServoData())) {
StyleNewSubtree(rootElement);
return true;
}
PreTraverse(aFlags);
AutoPrepareTraversal guard(this);
const SnapshotTable& snapshots = Snapshots();
// Restyle the document from the root element and each of the document level
// NAC subtree roots.
bool postTraversalRequired = false;
if (ShouldTraverseInParallel()) {
aFlags |= ServoTraversalFlags::ParallelTraversal;
}
// Do the first traversal.
DocumentStyleRootIterator iter(mDocument->GetServoRestyleRoot());
while (Element* root = iter.GetNextStyleRoot()) {
MOZ_ASSERT(MayTraverseFrom(root));
Element* parent = root->GetFlattenedTreeParentElementForStyle();
MOZ_ASSERT_IF(parent,
!parent->HasAnyOfFlags(Element::kAllServoDescendantBits));
postTraversalRequired |=
Servo_TraverseSubtree(root, mRawData.get(), &snapshots, aFlags) ||
root->HasAnyOfFlags(Element::kAllServoDescendantBits |
NODE_NEEDS_FRAME);
{
uint32_t existingBits = mDocument->GetServoRestyleRootDirtyBits();
Element* newRoot = nullptr;
while (parent && parent->HasDirtyDescendantsForServo()) {
MOZ_ASSERT(root == mDocument->GetServoRestyleRoot(),
"Restyle root shouldn't have magically changed");
// If any style invalidation was triggered in our siblings, then we may
// need to post-traverse them, even if the root wasn't restyled after
// all.
// We need to propagate the existing bits to the ancestor.
parent->SetFlags(existingBits);
newRoot = parent;
parent = parent->GetFlattenedTreeParentElementForStyle();
}
if (newRoot) {
mDocument->SetServoRestyleRoot(
newRoot, existingBits | ELEMENT_HAS_DIRTY_DESCENDANTS_FOR_SERVO);
postTraversalRequired = true;
}
}
}
// If there are still animation restyles needed, trigger a second traversal to
// update CSS animations or transitions' styles.
//
// Note that we need to check the style root again, because doing another
// PreTraverse on the EffectCompositor might alter the style root. But we
// don't need to worry about NAC, since document-level NAC shouldn't have
// animations.
//
// We don't need to do this for SMIL since SMIL only updates its animation
// values once at the begin of a tick. As a result, even if the previous
// traversal caused, for example, the font-size to change, the SMIL style
// won't be updated until the next tick anyway.
if (GetPresContext()->EffectCompositor()->PreTraverse(aFlags)) {
DocumentStyleRootIterator iter(mDocument->GetServoRestyleRoot());
while (Element* root = iter.GetNextStyleRoot()) {
postTraversalRequired |=
Servo_TraverseSubtree(root, mRawData.get(), &snapshots, aFlags) ||
root->HasAnyOfFlags(Element::kAllServoDescendantBits |
NODE_NEEDS_FRAME);
}
}
return postTraversalRequired;
}
void ServoStyleSet::StyleNewSubtree(Element* aRoot) {
MOZ_ASSERT(GetPresContext());
MOZ_ASSERT(!aRoot->HasServoData());
MOZ_ASSERT(aRoot->GetFlattenedTreeParentNodeForStyle(),
"Not in the flat tree? Fishy!");
PreTraverseSync();
AutoPrepareTraversal guard(this);
// Do the traversal. The snapshots will not be used.
const SnapshotTable& snapshots = Snapshots();
auto flags = ServoTraversalFlags::Empty;
if (ShouldTraverseInParallel()) {
flags |= ServoTraversalFlags::ParallelTraversal;
}
DebugOnly<bool> postTraversalRequired =
Servo_TraverseSubtree(aRoot, mRawData.get(), &snapshots, flags);
MOZ_ASSERT(!postTraversalRequired);
// Annoyingly, the newly-styled content may have animations that need
// starting, which requires traversing them again. Mark the elements
// that need animation processing, then do a forgetful traversal to
// update the styles and clear the animation bits.
if (GetPresContext()->EffectCompositor()->PreTraverseInSubtree(flags,
aRoot)) {
postTraversalRequired =
Servo_TraverseSubtree(aRoot, mRawData.get(), &snapshots,
ServoTraversalFlags::AnimationOnly |
ServoTraversalFlags::FinalAnimationTraversal);
MOZ_ASSERT(!postTraversalRequired);
}
}
void ServoStyleSet::MarkOriginsDirty(OriginFlags aChangedOrigins) {
SetStylistStyleSheetsDirty();
Servo_StyleSet_NoteStyleSheetsChanged(mRawData.get(), aChangedOrigins);
}
void ServoStyleSet::SetStylistStyleSheetsDirty() {
mStylistState |= StylistState::StyleSheetsDirty;
// We need to invalidate cached style in getComputedStyle for undisplayed
// elements, since we don't know if any of the style sheet change that we do
// would affect undisplayed elements.
//
// We don't allow to call getComputedStyle in elements without a pres shell
// yet, so it is fine if there's no pres context here.
if (nsPresContext* presContext = GetPresContext()) {
presContext->RestyleManager()->IncrementUndisplayedRestyleGeneration();
}
}
void ServoStyleSet::SetStylistShadowDOMStyleSheetsDirty() {
mStylistState |= StylistState::ShadowDOMStyleSheetsDirty;
if (nsPresContext* presContext = GetPresContext()) {
presContext->RestyleManager()->IncrementUndisplayedRestyleGeneration();
}
}
static OriginFlags ToOriginFlags(StyleOrigin aOrigin) {
switch (aOrigin) {
case StyleOrigin::UserAgent:
return OriginFlags::UserAgent;
case StyleOrigin::User:
return OriginFlags::User;
default:
MOZ_FALLTHROUGH_ASSERT("Unknown origin?");
case StyleOrigin::Author:
return OriginFlags::Author;
}
}
void ServoStyleSet::ImportRuleLoaded(dom::CSSImportRule&, StyleSheet& aSheet) {
if (mStyleRuleMap) {
mStyleRuleMap->SheetAdded(aSheet);
}
// TODO: Should probably consider ancestor sheets too.
if (!aSheet.IsApplicable()) {
return;
}
// TODO(emilio): Could handle it better given we know it is an insertion, and
// use the style invalidation machinery stuff that we do for regular sheet
// insertions.
MarkOriginsDirty(ToOriginFlags(aSheet.GetOrigin()));
}
void ServoStyleSet::RuleAdded(StyleSheet& aSheet, css::Rule& aRule) {
if (mStyleRuleMap) {
mStyleRuleMap->RuleAdded(aSheet, aRule);
}
if (!aSheet.IsApplicable() || aRule.IsIncompleteImportRule()) {
return;
}
RuleChangedInternal(aSheet, aRule, StyleRuleChangeKind::Insertion);
}
void ServoStyleSet::RuleRemoved(StyleSheet& aSheet, css::Rule& aRule) {
if (mStyleRuleMap) {
mStyleRuleMap->RuleRemoved(aSheet, aRule);
}
if (!aSheet.IsApplicable()) {
return;
}
RuleChangedInternal(aSheet, aRule, StyleRuleChangeKind::Removal);
}
void ServoStyleSet::RuleChangedInternal(StyleSheet& aSheet, css::Rule& aRule,
StyleRuleChangeKind aKind) {
MOZ_ASSERT(aSheet.IsApplicable());
SetStylistStyleSheetsDirty();
#define CASE_FOR(constant_, type_) \
case StyleCssRuleType::constant_: \
return Servo_StyleSet_##constant_##RuleChanged( \
mRawData.get(), static_cast<dom::CSS##type_##Rule&>(aRule).Raw(), \
&aSheet, aKind);
switch (aRule.Type()) {
CASE_FOR(CounterStyle, CounterStyle)
CASE_FOR(Style, Style)
CASE_FOR(Import, Import)
CASE_FOR(Media, Media)
CASE_FOR(Keyframes, Keyframes)
CASE_FOR(Margin, Margin)
CASE_FOR(FontFeatureValues, FontFeatureValues)
CASE_FOR(FontPaletteValues, FontPaletteValues)
CASE_FOR(FontFace, FontFace)
CASE_FOR(Page, Page)
CASE_FOR(Property, Property)
CASE_FOR(Document, MozDocument)
CASE_FOR(Supports, Supports)
CASE_FOR(LayerBlock, LayerBlock)
CASE_FOR(LayerStatement, LayerStatement)
CASE_FOR(Container, Container)
CASE_FOR(Scope, Scope)
CASE_FOR(StartingStyle, StartingStyle)
// @namespace can only be inserted / removed when there are only other
// @namespace and @import rules, and can't be mutated.
case StyleCssRuleType::Namespace:
break;
case StyleCssRuleType::Keyframe:
// FIXME: We should probably just forward to the parent @keyframes rule? I
// think that'd do the right thing, but meanwhile...
return MarkOriginsDirty(ToOriginFlags(aSheet.GetOrigin()));
}
#undef CASE_FOR
}
void ServoStyleSet::RuleChanged(StyleSheet& aSheet, css::Rule* aRule,
StyleRuleChangeKind aKind) {
if (!aSheet.IsApplicable()) {
return;
}
if (!aRule) {
// FIXME: This is done for StyleSheet.media attribute changes and such
MarkOriginsDirty(ToOriginFlags(aSheet.GetOrigin()));
} else {
RuleChangedInternal(aSheet, *aRule, aKind);
}
}
void ServoStyleSet::SheetCloned(StyleSheet& aSheet) {
mNeedsRestyleAfterEnsureUniqueInner = true;
if (mStyleRuleMap) {
mStyleRuleMap->SheetCloned(aSheet);
}
}
#ifdef DEBUG
void ServoStyleSet::AssertTreeIsClean() {
DocumentStyleRootIterator iter(mDocument);
while (Element* root = iter.GetNextStyleRoot()) {
Servo_AssertTreeIsClean(root);
}
}
#endif
bool ServoStyleSet::GetKeyframesForName(
const Element& aElement, const ComputedStyle& aStyle, nsAtom* aName,
const StyleComputedTimingFunction& aTimingFunction,
nsTArray<Keyframe>& aKeyframes) {
MOZ_ASSERT(!StylistNeedsUpdate());
return Servo_StyleSet_GetKeyframesForName(
mRawData.get(), &aElement, &aStyle, aName, &aTimingFunction, &aKeyframes);
}
nsTArray<ComputedKeyframeValues> ServoStyleSet::GetComputedKeyframeValuesFor(
const nsTArray<Keyframe>& aKeyframes, Element* aElement,
PseudoStyleType aPseudoType, const ComputedStyle* aStyle) {
nsTArray<ComputedKeyframeValues> result(aKeyframes.Length());
// Construct each nsTArray<PropertyStyleAnimationValuePair> here.
result.AppendElements(aKeyframes.Length());
Servo_GetComputedKeyframeValues(&aKeyframes, aElement, aPseudoType, aStyle,
mRawData.get(), &result);
return result;
}
void ServoStyleSet::GetAnimationValues(
StyleLockedDeclarationBlock* aDeclarations, Element* aElement,
const ComputedStyle* aComputedStyle,
nsTArray<RefPtr<StyleAnimationValue>>& aAnimationValues) {
// Servo_GetAnimationValues below won't handle ignoring existing element
// data for bfcached documents. (See comment in ResolveStyleLazily
// about these bfcache issues.)
Servo_GetAnimationValues(aDeclarations, aElement, aComputedStyle,
mRawData.get(), &aAnimationValues);
}
already_AddRefed<ComputedStyle> ServoStyleSet::GetBaseContextForElement(
Element* aElement, const ComputedStyle* aStyle) {
return Servo_StyleSet_GetBaseComputedValuesForElement(
mRawData.get(), aElement, aStyle, &Snapshots())
.Consume();
}
already_AddRefed<StyleAnimationValue> ServoStyleSet::ComputeAnimationValue(
Element* aElement, StyleLockedDeclarationBlock* aDeclarations,
const ComputedStyle* aStyle) {
return Servo_AnimationValue_Compute(aElement, aDeclarations, aStyle,
mRawData.get())
.Consume();
}
bool ServoStyleSet::UsesFontMetrics() const {
return Servo_StyleSet_UsesFontMetrics(mRawData.get());
}
bool ServoStyleSet::EnsureUniqueInnerOnCSSSheets() {
using SheetOwner = Variant<ServoStyleSet*, ShadowRoot*>;
AutoTArray<std::pair<StyleSheet*, SheetOwner>, 32> queue;
EnumerateStyleSheets([&](StyleSheet& aSheet) {
queue.AppendElement(std::make_pair(&aSheet, SheetOwner{this}));
});
EnumerateShadowRoots(*mDocument, [&](ShadowRoot& aShadowRoot) {
for (auto index : IntegerRange(aShadowRoot.SheetCount())) {
queue.AppendElement(
std::make_pair(aShadowRoot.SheetAt(index), SheetOwner{&aShadowRoot}));
}
for (const auto& adopted : aShadowRoot.AdoptedStyleSheets()) {
queue.AppendElement(
std::make_pair(adopted.get(), SheetOwner{&aShadowRoot}));
}
});
while (!queue.IsEmpty()) {
auto [sheet, owner] = queue.PopLastElement();
if (sheet->HasForcedUniqueInner()) {
// We already processed this sheet and its children.
// Normally we don't hit this but adopted stylesheets can have dupes so we
// can save some work here.
continue;
}
// Only call EnsureUniqueInner for complete sheets. If we do call it on
// incomplete sheets, we'll cause problems when the sheet is actually
// loaded. We don't care about incomplete sheets here anyway, because this
// method is only invoked by nsPresContext::EnsureSafeToHandOutCSSRules.
// The CSSRule objects we are handing out won't contain any rules derived
// from incomplete sheets (because they aren't yet applied in styling).
if (sheet->IsComplete()) {
sheet->EnsureUniqueInner();
}
// Enqueue all the sheet's children.
for (StyleSheet* child : sheet->ChildSheets()) {
queue.AppendElement(std::make_pair(child, owner));
}
}
if (mNeedsRestyleAfterEnsureUniqueInner) {
// TODO(emilio): We could make this faster if needed tracking the specific
// origins and sheets that have been cloned. But the only caller of this
// doesn't seem to really care about perf.
MarkOriginsDirty(OriginFlags::All);
ForceDirtyAllShadowStyles();
}
bool res = mNeedsRestyleAfterEnsureUniqueInner;
mNeedsRestyleAfterEnsureUniqueInner = false;
return res;
}
void ServoStyleSet::ClearCachedStyleData() {
ClearNonInheritingComputedStyles();
Servo_StyleSet_RebuildCachedData(mRawData.get());
mCachedAnonymousContentStyles.Clear();
PodArrayZero(mCachedAnonymousContentStyleIndexes);
}
void ServoStyleSet::ForceDirtyAllShadowStyles() {
bool anyShadow = false;
EnumerateShadowRoots(*mDocument, [&](ShadowRoot& aShadowRoot) {
if (auto* authorStyles = aShadowRoot.GetServoStyles()) {
anyShadow = true;
Servo_AuthorStyles_ForceDirty(authorStyles);
}
});
if (anyShadow) {
SetStylistShadowDOMStyleSheetsDirty();
}
}
void ServoStyleSet::CompatibilityModeChanged() {
Servo_StyleSet_CompatModeChanged(mRawData.get());
SetStylistStyleSheetsDirty();
ForceDirtyAllShadowStyles();
}
void ServoStyleSet::ClearNonInheritingComputedStyles() {
for (RefPtr<ComputedStyle>& ptr : mNonInheritingComputedStyles) {
ptr = nullptr;
}
}
already_AddRefed<ComputedStyle> ServoStyleSet::ResolveStyleLazily(
const Element& aElement, PseudoStyleType aPseudoType,
nsAtom* aFunctionalPseudoParameter, StyleRuleInclusion aRuleInclusion) {
PreTraverseSync();
MOZ_ASSERT(!StylistNeedsUpdate());
AutoSetInServoTraversal guard(this);
/**
* NB: This is needed because we process animations and transitions on the
* pseudo-elements themselves, not on the parent's EagerPseudoStyles.
*
* That means that that style doesn't account for animations, and we can't do
* that easily from the traversal without doing wasted work.
*
* As such, we just lie here a bit, which is the entrypoint of
* getComputedStyle, the only API where this can be observed, to look at the
* style of the pseudo-element if it exists instead.
*/
const Element* elementForStyleResolution = &aElement;
PseudoStyleType pseudoTypeForStyleResolution = aPseudoType;
if (aPseudoType == PseudoStyleType::before) {
if (Element* pseudo = nsLayoutUtils::GetBeforePseudo(&aElement)) {
elementForStyleResolution = pseudo;
pseudoTypeForStyleResolution = PseudoStyleType::NotPseudo;
}
} else if (aPseudoType == PseudoStyleType::after) {
if (Element* pseudo = nsLayoutUtils::GetAfterPseudo(&aElement)) {
elementForStyleResolution = pseudo;
pseudoTypeForStyleResolution = PseudoStyleType::NotPseudo;
}
} else if (aPseudoType == PseudoStyleType::marker) {
if (Element* pseudo = nsLayoutUtils::GetMarkerPseudo(&aElement)) {
elementForStyleResolution = pseudo;
pseudoTypeForStyleResolution = PseudoStyleType::NotPseudo;
}
}
nsPresContext* pc = GetPresContext();
MOZ_ASSERT(pc, "For now, no style resolution without a pres context");
auto* restyleManager = pc->RestyleManager();
const bool canUseCache = aRuleInclusion == StyleRuleInclusion::All &&
aElement.OwnerDoc() == mDocument &&
pc->PresShell()->DidInitialize();
return Servo_ResolveStyleLazily(
elementForStyleResolution, pseudoTypeForStyleResolution,
aFunctionalPseudoParameter, aRuleInclusion,
&restyleManager->Snapshots(),
restyleManager->GetUndisplayedRestyleGeneration(), canUseCache,
mRawData.get())
.Consume();
}
void ServoStyleSet::AppendFontFaceRules(
nsTArray<nsFontFaceRuleContainer>& aArray) {
// TODO(emilio): Can we make this so this asserts instead?
UpdateStylistIfNeeded();
Servo_StyleSet_GetFontFaceRules(mRawData.get(), &aArray);
}
const StyleLockedCounterStyleRule* ServoStyleSet::CounterStyleRuleForName(
nsAtom* aName) {
MOZ_ASSERT(!StylistNeedsUpdate());
return Servo_StyleSet_GetCounterStyleRule(mRawData.get(), aName);
}
already_AddRefed<gfxFontFeatureValueSet>
ServoStyleSet::BuildFontFeatureValueSet() {
MOZ_ASSERT(!StylistNeedsUpdate());
RefPtr<gfxFontFeatureValueSet> set =
Servo_StyleSet_BuildFontFeatureValueSet(mRawData.get());
return set.forget();
}
already_AddRefed<gfx::FontPaletteValueSet>
ServoStyleSet::BuildFontPaletteValueSet() {
MOZ_ASSERT(!StylistNeedsUpdate());
RefPtr<gfx::FontPaletteValueSet> set =
Servo_StyleSet_BuildFontPaletteValueSet(mRawData.get());
return set.forget();
}
already_AddRefed<ComputedStyle> ServoStyleSet::ResolveForDeclarations(
const ComputedStyle* aParentOrNull,
const StyleLockedDeclarationBlock* aDeclarations) {
// No need to update the stylist, we're only cascading aDeclarations.
return Servo_StyleSet_ResolveForDeclarations(mRawData.get(), aParentOrNull,
aDeclarations)
.Consume();
}
void ServoStyleSet::UpdateStylist() {
AUTO_PROFILER_LABEL_RELEVANT_FOR_JS("Update stylesheet information", LAYOUT);
MOZ_ASSERT(StylistNeedsUpdate());
if (mStylistState & StylistState::StyleSheetsDirty) {
Element* root = mDocument->GetRootElement();
const ServoElementSnapshotTable* snapshots = nullptr;
if (nsPresContext* pc = GetPresContext()) {
snapshots = &pc->RestyleManager()->Snapshots();
}
Servo_StyleSet_FlushStyleSheets(mRawData.get(), root, snapshots);
}
if (MOZ_UNLIKELY(mStylistState & StylistState::ShadowDOMStyleSheetsDirty)) {
EnumerateShadowRoots(*mDocument, [&](ShadowRoot& aShadowRoot) {
if (auto* authorStyles = aShadowRoot.GetServoStyles()) {
Servo_AuthorStyles_Flush(authorStyles, mRawData.get());
}
});
Servo_StyleSet_RemoveUniqueEntriesFromAuthorStylesCache(mRawData.get());
}
mStylistState = StylistState::NotDirty;
}
void ServoStyleSet::MaybeGCRuleTree() {
MOZ_ASSERT(NS_IsMainThread());
Servo_MaybeGCRuleTree(mRawData.get());
}
/* static */
bool ServoStyleSet::MayTraverseFrom(const Element* aElement) {
MOZ_ASSERT(aElement->IsInComposedDoc());
nsINode* parent = aElement->GetFlattenedTreeParentNodeForStyle();
if (!parent) {
return false;
}
if (!parent->IsElement()) {
MOZ_ASSERT(parent->IsDocument());
return true;
}
if (!parent->AsElement()->HasServoData()) {
return false;
}
return !Servo_Element_IsDisplayNone(parent->AsElement());
}
bool ServoStyleSet::ShouldTraverseInParallel() const {
MOZ_ASSERT(mDocument->GetPresShell(), "Styling a document without a shell?");
if (!mDocument->GetPresShell()->IsActive()) {
return false;
}
if (profiler_feature_active(ProfilerFeature::SequentialStyle)) {
return false;
}
return true;
}
void ServoStyleSet::RunPostTraversalTasks() {
MOZ_ASSERT(!IsInServoTraversal());
if (mPostTraversalTasks.IsEmpty()) {
return;
}
nsTArray<PostTraversalTask> tasks = std::move(mPostTraversalTasks);
for (auto& task : tasks) {
task.Run();
}
}
ServoStyleRuleMap* ServoStyleSet::StyleRuleMap() {
if (!mStyleRuleMap) {
mStyleRuleMap = MakeUnique<ServoStyleRuleMap>();
}
mStyleRuleMap->EnsureTable(*this);
return mStyleRuleMap.get();
}
bool ServoStyleSet::MightHaveAttributeDependency(const Element& aElement,
nsAtom* aAttribute) const {
return Servo_StyleSet_MightHaveAttributeDependency(mRawData.get(), &aElement,
aAttribute);
}
bool ServoStyleSet::MightHaveNthOfIDDependency(const Element& aElement,
nsAtom* aOldID,
nsAtom* aNewID) const {
return Servo_StyleSet_MightHaveNthOfIDDependency(mRawData.get(), &aElement,
aOldID, aNewID);
}
bool ServoStyleSet::MightHaveNthOfClassDependency(const Element& aElement) {
return Servo_StyleSet_MightHaveNthOfClassDependency(mRawData.get(), &aElement,
&Snapshots());
}
void ServoStyleSet::MaybeInvalidateRelativeSelectorIDDependency(
const Element& aElement, nsAtom* aOldID, nsAtom* aNewID,
const ServoElementSnapshotTable& aSnapshots) {
Servo_StyleSet_MaybeInvalidateRelativeSelectorIDDependency(
mRawData.get(), &aElement, aOldID, aNewID, &aSnapshots);
}
void ServoStyleSet::MaybeInvalidateRelativeSelectorClassDependency(
const Element& aElement, const ServoElementSnapshotTable& aSnapshots) {
Servo_StyleSet_MaybeInvalidateRelativeSelectorClassDependency(
mRawData.get(), &aElement, &aSnapshots);
}
void ServoStyleSet::MaybeInvalidateRelativeSelectorCustomStateDependency(
const Element& aElement, nsAtom* state,
const ServoElementSnapshotTable& aSnapshots) {
Servo_StyleSet_MaybeInvalidateRelativeSelectorCustomStateDependency(
mRawData.get(), &aElement, state, &aSnapshots);
}
void ServoStyleSet::MaybeInvalidateRelativeSelectorAttributeDependency(
const Element& aElement, nsAtom* aAttribute,
const ServoElementSnapshotTable& aSnapshots) {
Servo_StyleSet_MaybeInvalidateRelativeSelectorAttributeDependency(
mRawData.get(), &aElement, aAttribute, &aSnapshots);
}
void ServoStyleSet::MaybeInvalidateRelativeSelectorStateDependency(
const Element& aElement, ElementState aState,
const ServoElementSnapshotTable& aSnapshots) {
Servo_StyleSet_MaybeInvalidateRelativeSelectorStateDependency(
mRawData.get(), &aElement, aState.GetInternalValue(), &aSnapshots);
}
void ServoStyleSet::MaybeInvalidateRelativeSelectorForEmptyDependency(
const Element& aElement) {
Servo_StyleSet_MaybeInvalidateRelativeSelectorEmptyDependency(mRawData.get(),
&aElement);
}
void ServoStyleSet::MaybeInvalidateRelativeSelectorForNthEdgeDependency(
const Element& aElement) {
Servo_StyleSet_MaybeInvalidateRelativeSelectorNthEdgeDependency(
mRawData.get(), &aElement);
}
void ServoStyleSet::MaybeInvalidateRelativeSelectorForNthDependencyFromSibling(
const Element* aFromSibling) {
if (aFromSibling == nullptr) {
return;
}
Servo_StyleSet_MaybeInvalidateRelativeSelectorNthDependencyFromSibling(
mRawData.get(), aFromSibling);
}
void ServoStyleSet::MaybeInvalidateForElementInsertion(
const Element& aElement) {
Servo_StyleSet_MaybeInvalidateRelativeSelectorForInsertion(mRawData.get(),
&aElement);
}
void ServoStyleSet::MaybeInvalidateForElementAppend(
const nsIContent& aFirstContent) {
Servo_StyleSet_MaybeInvalidateRelativeSelectorForAppend(mRawData.get(),
&aFirstContent);
}
void ServoStyleSet::MaybeInvalidateForElementRemove(
const Element& aElement, const nsIContent* aFollowingSibling) {
Servo_StyleSet_MaybeInvalidateRelativeSelectorForRemoval(
mRawData.get(), &aElement, aFollowingSibling);
}
bool ServoStyleSet::MightHaveNthOfAttributeDependency(
const Element& aElement, nsAtom* aAttribute) const {
return Servo_StyleSet_MightHaveNthOfAttributeDependency(
mRawData.get(), &aElement, aAttribute);
}
bool ServoStyleSet::HasStateDependency(const Element& aElement,
dom::ElementState aState) const {
return Servo_StyleSet_HasStateDependency(mRawData.get(), &aElement,
aState.GetInternalValue());
}
bool ServoStyleSet::HasNthOfStateDependency(const Element& aElement,
dom::ElementState aState) const {
return Servo_StyleSet_HasNthOfStateDependency(mRawData.get(), &aElement,
aState.GetInternalValue());
}
bool ServoStyleSet::HasNthOfCustomStateDependency(const Element& aElement,
nsAtom* aState) const {
return Servo_StyleSet_HasNthOfCustomStateDependency(mRawData.get(), &aElement,
aState);
}
void ServoStyleSet::RestyleSiblingsForNthOf(const Element& aElement,
uint32_t aFlags) const {
Servo_StyleSet_RestyleSiblingsForNthOf(&aElement, aFlags);
}
bool ServoStyleSet::HasDocumentStateDependency(
dom::DocumentState aState) const {
return Servo_StyleSet_HasDocumentStateDependency(mRawData.get(),
aState.GetInternalValue());
}
already_AddRefed<ComputedStyle> ServoStyleSet::ReparentComputedStyle(
ComputedStyle* aComputedStyle, ComputedStyle* aNewParent,
ComputedStyle* aNewLayoutParent, Element* aElement) {
return Servo_ReparentStyle(aComputedStyle, aNewParent, aNewLayoutParent,
aElement, mRawData.get())
.Consume();
}
void ServoStyleSet::InvalidateForViewportUnits(OnlyDynamic aOnlyDynamic) {
dom::Element* root = mDocument->GetRootElement();
if (!root) {
return;
}
Servo_InvalidateForViewportUnits(mRawData.get(), root,
aOnlyDynamic == OnlyDynamic::Yes);
}
void ServoStyleSet::RegisterProperty(const PropertyDefinition& aDefinition,
ErrorResult& aRv) {
using Result = StyleRegisterCustomPropertyResult;
auto result = Servo_RegisterCustomProperty(
RawData(), mDocument->DefaultStyleAttrURLData(), &aDefinition.mName,
&aDefinition.mSyntax, aDefinition.mInherits,
aDefinition.mInitialValue.WasPassed() ? &aDefinition.mInitialValue.Value()
: nullptr);
switch (result) {
case Result::SuccessfullyRegistered:
if (Element* root = mDocument->GetRootElement()) {
if (nsPresContext* pc = GetPresContext()) {
pc->RestyleManager()->PostRestyleEvent(
root, RestyleHint::RecascadeSubtree(), nsChangeHint(0));
}
}
mDocument->PostCustomPropertyRegistered(aDefinition);
break;
case Result::InvalidName:
return aRv.ThrowSyntaxError("Invalid name");
case Result::InvalidSyntax:
return aRv.ThrowSyntaxError("Invalid syntax descriptor");
case Result::InvalidInitialValue:
return aRv.ThrowSyntaxError("Invalid initial value syntax");
case Result::NoInitialValue:
return aRv.ThrowSyntaxError(
"Initial value is required when syntax is not universal");
case Result::InitialValueNotComputationallyIndependent:
return aRv.ThrowSyntaxError(
"Initial value is required when syntax is not universal");
case Result::AlreadyRegistered:
return aRv.ThrowInvalidModificationError("Property already registered");
}
}
NS_IMPL_ISUPPORTS(UACacheReporter, nsIMemoryReporter)
MOZ_DEFINE_MALLOC_SIZE_OF(ServoUACacheMallocSizeOf)
MOZ_DEFINE_MALLOC_ENCLOSING_SIZE_OF(ServoUACacheMallocEnclosingSizeOf)
NS_IMETHODIMP
UACacheReporter::CollectReports(nsIHandleReportCallback* aHandleReport,
nsISupports* aData, bool aAnonymize) {
ServoStyleSetSizes sizes;
Servo_UACache_AddSizeOf(ServoUACacheMallocSizeOf,
ServoUACacheMallocEnclosingSizeOf, &sizes);
#define REPORT(_path, _amount, _desc) \
do { \
size_t __amount = _amount; /* evaluate _amount only once */ \
if (__amount > 0) { \
MOZ_COLLECT_REPORT(_path, KIND_HEAP, UNITS_BYTES, __amount, _desc); \
} \
} while (0)
// The UA cache does not contain the rule tree; that's in the StyleSet.
MOZ_RELEASE_ASSERT(sizes.mRuleTree == 0);
REPORT("explicit/layout/servo-ua-cache/precomputed-pseudos",
sizes.mPrecomputedPseudos,
"Memory used by precomputed pseudo-element declarations within the "
"UA cache.");
REPORT("explicit/layout/servo-ua-cache/element-and-pseudos-maps",
sizes.mElementAndPseudosMaps,
"Memory used by element and pseudos maps within the UA cache.");
REPORT("explicit/layout/servo-ua-cache/invalidation-map",
sizes.mInvalidationMap,
"Memory used by invalidation maps within the UA cache.");
REPORT("explicit/layout/servo-ua-cache/revalidation-selectors",
sizes.mRevalidationSelectors,
"Memory used by selectors for cache revalidation within the UA "
"cache.");
REPORT("explicit/layout/servo-ua-cache/other", sizes.mOther,
"Memory used by other data within the UA cache");
return NS_OK;
}
} // namespace mozilla