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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/dom/CSSStyleRule.h"
#include "mozilla/dom/CSSStyleRuleBinding.h"
#include "mozilla/CSSEnabledState.h"
#include "mozilla/DeclarationBlock.h"
#include "mozilla/PseudoStyleType.h"
#include "mozilla/ServoBindings.h"
#include "mozilla/dom/ShadowRoot.h"
#include "nsCSSPseudoElements.h"
#include "nsISupports.h"
namespace mozilla::dom {
// -- CSSStyleRuleDeclaration ---------------------------------------
CSSStyleRuleDeclaration::CSSStyleRuleDeclaration(
already_AddRefed<StyleLockedDeclarationBlock> aDecls)
: mDecls(new DeclarationBlock(std::move(aDecls))) {
mDecls->SetOwningRule(Rule());
}
CSSStyleRuleDeclaration::~CSSStyleRuleDeclaration() {
mDecls->SetOwningRule(nullptr);
}
// QueryInterface implementation for CSSStyleRuleDeclaration
NS_INTERFACE_MAP_BEGIN(CSSStyleRuleDeclaration)
NS_WRAPPERCACHE_INTERFACE_MAP_ENTRY
// We forward the cycle collection interfaces to Rule(), which is
// never null (in fact, we're part of that object!)
if (aIID.Equals(NS_GET_IID(nsCycleCollectionISupports)) ||
aIID.Equals(NS_GET_IID(nsXPCOMCycleCollectionParticipant))) {
return Rule()->QueryInterface(aIID, aInstancePtr);
}
NS_INTERFACE_MAP_END_INHERITING(nsDOMCSSDeclaration)
NS_IMPL_ADDREF_USING_AGGREGATOR(CSSStyleRuleDeclaration, Rule())
NS_IMPL_RELEASE_USING_AGGREGATOR(CSSStyleRuleDeclaration, Rule())
/* nsDOMCSSDeclaration implementation */
css::Rule* CSSStyleRuleDeclaration::GetParentRule() { return Rule(); }
nsINode* CSSStyleRuleDeclaration::GetAssociatedNode() const {
return Rule()->GetAssociatedDocumentOrShadowRoot();
}
nsISupports* CSSStyleRuleDeclaration::GetParentObject() const {
return Rule()->GetParentObject();
}
DeclarationBlock* CSSStyleRuleDeclaration::GetOrCreateCSSDeclaration(
Operation aOperation, DeclarationBlock** aCreated) {
if (aOperation != Operation::Read) {
if (StyleSheet* sheet = Rule()->GetStyleSheet()) {
sheet->WillDirty();
}
}
return mDecls;
}
void CSSStyleRuleDeclaration::SetRawAfterClone(
RefPtr<StyleLockedDeclarationBlock> aRaw) {
auto block = MakeRefPtr<DeclarationBlock>(aRaw.forget());
mDecls->SetOwningRule(nullptr);
mDecls = std::move(block);
mDecls->SetOwningRule(Rule());
}
void CSSStyleRule::SetRawAfterClone(RefPtr<StyleLockedStyleRule> aRaw) {
mRawRule = std::move(aRaw);
mDecls.SetRawAfterClone(Servo_StyleRule_GetStyle(mRawRule).Consume());
GroupRule::DidSetRawAfterClone();
}
already_AddRefed<StyleLockedCssRules> CSSStyleRule::GetOrCreateRawRules() {
return Servo_StyleRule_EnsureRules(mRawRule, IsReadOnly()).Consume();
}
nsresult CSSStyleRuleDeclaration::SetCSSDeclaration(
DeclarationBlock* aDecl, MutationClosureData* aClosureData) {
CSSStyleRule* rule = Rule();
RefPtr<DeclarationBlock> oldDecls;
if (StyleSheet* sheet = rule->GetStyleSheet()) {
if (aDecl != mDecls) {
oldDecls = std::move(mDecls);
oldDecls->SetOwningRule(nullptr);
Servo_StyleRule_SetStyle(rule->Raw(), aDecl->Raw());
mDecls = aDecl;
mDecls->SetOwningRule(rule);
}
sheet->RuleChanged(rule, {StyleRuleChangeKind::StyleRuleDeclarations,
oldDecls ? oldDecls.get() : aDecl, aDecl});
}
return NS_OK;
}
nsDOMCSSDeclaration::ParsingEnvironment
CSSStyleRuleDeclaration::GetParsingEnvironment(nsIPrincipal*) const {
return GetParsingEnvironmentForRule(Rule(), StyleCssRuleType::Style);
}
// -- CSSStyleRule --------------------------------------------------
CSSStyleRule::CSSStyleRule(already_AddRefed<StyleLockedStyleRule> aRawRule,
StyleSheet* aSheet, css::Rule* aParentRule,
uint32_t aLine, uint32_t aColumn)
: GroupRule(aSheet, aParentRule, aLine, aColumn),
mRawRule(aRawRule),
mDecls(Servo_StyleRule_GetStyle(mRawRule).Consume()) {}
NS_IMPL_ISUPPORTS_CYCLE_COLLECTION_INHERITED_0(CSSStyleRule, GroupRule)
NS_IMPL_CYCLE_COLLECTION_CLASS(CSSStyleRule)
NS_IMPL_CYCLE_COLLECTION_TRACE_BEGIN_INHERITED(CSSStyleRule, GroupRule)
// Keep this in sync with IsCCLeaf.
// Trace the wrapper for our declaration. This just expands out
// NS_IMPL_CYCLE_COLLECTION_TRACE_PRESERVED_WRAPPER which we can't use
// directly because the wrapper is on the declaration, not on us.
tmp->mDecls.TraceWrapper(aCallbacks, aClosure);
NS_IMPL_CYCLE_COLLECTION_TRACE_END
NS_IMPL_CYCLE_COLLECTION_UNLINK_BEGIN(CSSStyleRule)
// Keep this in sync with IsCCLeaf.
// Unlink the wrapper for our declaration.
//
// Note that this has to happen before unlinking css::Rule.
tmp->UnlinkDeclarationWrapper(tmp->mDecls);
NS_IMPL_CYCLE_COLLECTION_UNLINK_WEAK_PTR
NS_IMPL_CYCLE_COLLECTION_UNLINK_END_INHERITED(GroupRule)
NS_IMPL_CYCLE_COLLECTION_TRAVERSE_BEGIN_INHERITED(CSSStyleRule, GroupRule)
// Keep this in sync with IsCCLeaf.
NS_IMPL_CYCLE_COLLECTION_TRAVERSE_END
bool CSSStyleRule::IsCCLeaf() const {
if (!GroupRule::IsCCLeaf()) {
return false;
}
return !mDecls.PreservingWrapper();
}
size_t CSSStyleRule::SizeOfIncludingThis(MallocSizeOf aMallocSizeOf) const {
size_t n = aMallocSizeOf(this);
// Measurement of the following members may be added later if DMD finds it
// is worthwhile:
// - mRawRule
// - mDecls
return n;
}
#ifdef DEBUG
void CSSStyleRule::List(FILE* out, int32_t aIndent) const {
nsAutoCString str;
for (int32_t i = 0; i < aIndent; i++) {
str.AppendLiteral(" ");
}
Servo_StyleRule_Debug(mRawRule, &str);
fprintf_stderr(out, "%s\n", str.get());
}
#endif
/* CSSRule implementation */
StyleCssRuleType CSSStyleRule::Type() const { return StyleCssRuleType::Style; }
void CSSStyleRule::GetCssText(nsACString& aCssText) const {
Servo_StyleRule_GetCssText(mRawRule, &aCssText);
}
/* CSSStyleRule implementation */
StyleLockedDeclarationBlock* CSSStyleRule::RawStyle() const {
return mDecls.mDecls->Raw();
}
void CSSStyleRule::GetSelectorText(nsACString& aSelectorText) {
Servo_StyleRule_GetSelectorText(mRawRule, &aSelectorText);
}
void CSSStyleRule::SetSelectorText(const nsACString& aSelectorText) {
if (IsReadOnly()) {
return;
}
StyleSheet* sheet = GetStyleSheet();
if (!sheet) {
return;
}
sheet->WillDirty();
auto state = ContainingRuleState::From(mParentRule);
// TODO(emilio): May actually be more efficient to handle this as rule
// removal + addition, from the point of view of invalidation...
const StyleStylesheetContents* contents = sheet->RawContents();
if (Servo_StyleRule_SetSelectorText(
contents, mRawRule, &aSelectorText,
state.mParseRelativeType.ptrOr(nullptr))) {
sheet->RuleChanged(this, StyleRuleChangeKind::Generic);
}
}
uint32_t CSSStyleRule::SelectorCount() const {
return Servo_StyleRule_GetSelectorCount(mRawRule);
}
static void CollectStyleRules(CSSStyleRule& aDeepestRule, bool aDesugared,
nsTArray<const StyleLockedStyleRule*>& aResult) {
aResult.AppendElement(aDeepestRule.Raw());
if (aDesugared) {
for (auto* rule = aDeepestRule.GetParentRule(); rule;
rule = rule->GetParentRule()) {
if (rule->Type() == StyleCssRuleType::Style) {
aResult.AppendElement(static_cast<CSSStyleRule*>(rule)->Raw());
}
}
}
}
void CSSStyleRule::GetSelectorDataAtIndex(uint32_t aSelectorIndex,
bool aDesugared, nsACString* aText,
uint64_t* aSpecificity) {
AutoTArray<const StyleLockedStyleRule*, 8> rules;
CollectStyleRules(*this, aDesugared, rules);
Servo_StyleRule_GetSelectorDataAtIndex(&rules, aSelectorIndex, aText,
aSpecificity);
}
void CSSStyleRule::SelectorTextAt(uint32_t aSelectorIndex, bool aDesugared,
nsACString& aText) {
GetSelectorDataAtIndex(aSelectorIndex, aDesugared, &aText, nullptr);
}
uint64_t CSSStyleRule::SelectorSpecificityAt(uint32_t aSelectorIndex,
bool aDesugared) {
uint64_t s = 0;
GetSelectorDataAtIndex(aSelectorIndex, aDesugared, nullptr, &s);
return s;
}
bool CSSStyleRule::SelectorMatchesElement(uint32_t aSelectorIndex,
Element& aElement,
const nsAString& aPseudo,
bool aRelevantLinkVisited) {
Maybe<PseudoStyleRequest> pseudo = nsCSSPseudoElements::ParsePseudoElement(
aPseudo, CSSEnabledState::IgnoreEnabledState);
if (!pseudo) {
return false;
}
auto* host = [&]() -> Element* {
auto* sheet = GetStyleSheet();
if (!sheet) {
return nullptr;
}
if (auto* owner = sheet->GetAssociatedDocumentOrShadowRoot()) {
if (auto* shadow = ShadowRoot::FromNode(owner->AsNode())) {
return shadow->Host();
}
}
for (auto* adopter : sheet->SelfOrAncestorAdopters()) {
// Try to guess. This is not fully correct but it's the best we can do
// with the info at hand...
auto* shadow = ShadowRoot::FromNode(adopter->AsNode());
if (!shadow) {
continue;
}
if (shadow->Host() == &aElement ||
shadow == aElement.GetContainingShadow()) {
return shadow->Host();
}
}
return nullptr;
}();
AutoTArray<const StyleLockedStyleRule*, 8> rules;
CollectStyleRules(*this, /* aDesugared = */ true, rules);
// to revist here once we finish the support of view-transitions.
return Servo_StyleRule_SelectorMatchesElement(
&rules, &aElement, aSelectorIndex, host, pseudo->mType,
aRelevantLinkVisited);
}
SelectorWarningKind ToWebIDLSelectorWarningKind(
StyleSelectorWarningKind aKind) {
switch (aKind) {
case StyleSelectorWarningKind::UnconstraintedRelativeSelector:
return SelectorWarningKind::UnconstrainedHas;
}
MOZ_ASSERT_UNREACHABLE("Unhandled selector warning kind");
// Return something for assert-disabled builds.
return SelectorWarningKind::UnconstrainedHas;
}
void CSSStyleRule::GetSelectorWarnings(
nsTArray<SelectorWarning>& aResult) const {
nsTArray<StyleSelectorWarningData> result;
Servo_GetSelectorWarnings(mRawRule, &result);
for (const auto& warning : result) {
auto& entry = *aResult.AppendElement();
entry.mIndex = warning.index;
entry.mKind = ToWebIDLSelectorWarningKind(warning.kind);
}
}
already_AddRefed<nsINodeList> CSSStyleRule::QuerySelectorAll(nsINode& aRoot) {
AutoTArray<const StyleLockedStyleRule*, 8> rules;
CollectStyleRules(*this, /* aDesugared = */ true, rules);
StyleSelectorList* list = Servo_StyleRule_GetSelectorList(&rules);
auto contentList = MakeRefPtr<nsSimpleContentList>(&aRoot);
Servo_SelectorList_QueryAll(&aRoot, list, contentList.get(),
/* useInvalidation */ false);
Servo_SelectorList_Drop(list);
return contentList.forget();
}
/* virtual */
JSObject* CSSStyleRule::WrapObject(JSContext* aCx,
JS::Handle<JSObject*> aGivenProto) {
return CSSStyleRule_Binding::Wrap(aCx, this, aGivenProto);
}
} // namespace mozilla::dom