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/* 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/CachedInheritingStyles.h"
#include "mozilla/ComputedStyle.h"
#include "mozilla/PseudoStyleType.h"
#include "nsCOMPtr.h"
#include "nsWindowSizes.h"
namespace mozilla {
void CachedInheritingStyles::Insert(ComputedStyle* aStyle,
PseudoStyleType aType,
nsAtom* aFunctionalPseudoParameter) {
MOZ_ASSERT_IF(aStyle, aStyle->IsInheritingAnonBox() ||
aStyle->IsLazilyCascadedPseudoElement());
MOZ_ASSERT_IF(aStyle, aStyle->GetPseudoType() == aType);
// Direct mode stores a single ComputedStyle* without a functional parameter.
// Null-direct mode stores a single probed-null result without a functional
// parameter (PseudoStyleType encoded in the upper bits of mBits).
// Functional parameters always require indirect storage.
const bool needsIndirect = aFunctionalPseudoParameter != nullptr;
if (IsEmpty() && !needsIndirect) {
if (aStyle) {
RefPtr<ComputedStyle> s = aStyle;
mBits = reinterpret_cast<uintptr_t>(s.forget().take());
MOZ_ASSERT(!IsEmpty() && !IsIndirect() && !IsNullDirect());
} else {
mBits = (static_cast<uintptr_t>(aType) << 2) | 2;
MOZ_ASSERT(IsNullDirect());
}
} else if (IsIndirect()) {
AsIndirect()->AppendElement(
CachedStyleEntry{aStyle, aFunctionalPseudoParameter, aType});
} else {
IndirectCache* cache = new IndirectCache();
if (!IsEmpty()) {
if (IsNullDirect()) {
cache->AppendElement(
CachedStyleEntry{nullptr, nullptr, NullDirectType()});
} else {
auto* direct = AsDirect();
cache->AppendElement(CachedStyleEntry{dont_AddRef(direct), nullptr,
direct->GetPseudoType()});
}
}
cache->AppendElement(
CachedStyleEntry{aStyle, aFunctionalPseudoParameter, aType});
mBits = reinterpret_cast<uintptr_t>(cache) | 1;
MOZ_ASSERT(IsIndirect());
}
}
ComputedStyle* CachedInheritingStyles::Lookup(
const PseudoStyleRequest& aRequest) const {
MOZ_ASSERT(PseudoStyle::IsPseudoElement(aRequest.mType) ||
PseudoStyle::IsInheritingAnonBox(aRequest.mType));
if (IsIndirect()) {
for (const auto& entry : *AsIndirect()) {
if (!entry.mStyle) {
continue;
}
if (entry.mPseudoType == aRequest.mType &&
entry.mFunctionalPseudoParameter == aRequest.mIdentifier) {
return entry.mStyle;
}
}
return nullptr;
}
// Direct modes only store non-functional entries.
if (aRequest.mIdentifier) {
return nullptr;
}
if (IsNullDirect()) {
return nullptr;
}
ComputedStyle* direct = AsDirect();
return direct && direct->GetPseudoType() == aRequest.mType ? direct : nullptr;
}
bool CachedInheritingStyles::HasEntry(
const PseudoStyleRequest& aRequest) const {
if (IsIndirect()) {
for (const auto& entry : *AsIndirect()) {
if (entry.mPseudoType == aRequest.mType &&
entry.mFunctionalPseudoParameter == aRequest.mIdentifier) {
return true;
}
}
return false;
}
if (aRequest.mIdentifier) {
return false;
}
if (IsNullDirect()) {
return NullDirectType() == aRequest.mType;
}
ComputedStyle* direct = AsDirect();
return direct && direct->GetPseudoType() == aRequest.mType;
}
void CachedInheritingStyles::AppendTo(
nsTArray<const ComputedStyle*>& aArray) const {
if (IsEmpty() || IsNullDirect()) {
return;
}
if (IsIndirect()) {
for (const auto& entry : *AsIndirect()) {
if (entry.mStyle) {
aArray.AppendElement(entry.mStyle.get());
}
}
return;
}
aArray.AppendElement(AsDirect());
}
void CachedInheritingStyles::AddSizeOfIncludingThis(nsWindowSizes& aSizes,
size_t* aCVsSize) const {
if (IsIndirect()) {
for (const auto& entry : *AsIndirect()) {
if (entry.mStyle && !aSizes.mState.HaveSeenPtr(entry.mStyle)) {
entry.mStyle->AddSizeOfIncludingThis(aSizes, aCVsSize);
}
}
return;
}
if (IsNullDirect()) {
return;
}
ComputedStyle* direct = AsDirect();
if (direct && !aSizes.mState.HaveSeenPtr(direct)) {
direct->AddSizeOfIncludingThis(aSizes, aCVsSize);
}
}
} // namespace mozilla