Source code
Revision control
Copy as Markdown
Other Tools
/* -*- 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
/* Some inline functions declared in cbindgen.toml */
#ifndef mozilla_ServoStyleConstsInlines_h
#define mozilla_ServoStyleConstsInlines_h
#include "mozilla/ServoStyleConsts.h"
#include "mozilla/AspectRatio.h"
#include "mozilla/EndianUtils.h"
#include "mozilla/URLExtraData.h"
#include "mozilla/dom/WorkerCommon.h"
#include "nsGkAtoms.h"
#include "MainThreadUtils.h"
#include "nsNetUtil.h"
#include <type_traits>
#include <new>
// TODO(emilio): there are quite a few other implementations scattered around
// that should move here.
namespace mozilla {
// We need to explicitly instantiate these so that the clang plugin can see that
// they're trivially copyable...
//
// this automatically from cbindgen.
template struct StyleStrong<ComputedStyle>;
template struct StyleStrong<StyleLockedCssRules>;
template struct StyleStrong<StyleAnimationValue>;
template struct StyleStrong<StyleLockedDeclarationBlock>;
template struct StyleStrong<StyleStylesheetContents>;
template struct StyleStrong<StyleLockedKeyframe>;
template struct StyleStrong<StyleLayerBlockRule>;
template struct StyleStrong<StyleLayerStatementRule>;
template struct StyleStrong<StyleLockedMediaList>;
template struct StyleStrong<StyleLockedStyleRule>;
template struct StyleStrong<StyleLockedImportRule>;
template struct StyleStrong<StyleLockedKeyframesRule>;
template struct StyleStrong<StyleMediaRule>;
template struct StyleStrong<StyleDocumentRule>;
template struct StyleStrong<StyleNamespaceRule>;
template struct StyleStrong<StyleMarginRule>;
template struct StyleStrong<StyleLockedPageRule>;
template struct StyleStrong<StylePropertyRule>;
template struct StyleStrong<StyleSupportsRule>;
template struct StyleStrong<StyleFontFeatureValuesRule>;
template struct StyleStrong<StyleFontPaletteValuesRule>;
template struct StyleStrong<StyleLockedFontFaceRule>;
template struct StyleStrong<StyleLockedCounterStyleRule>;
template struct StyleStrong<StyleContainerRule>;
template struct StyleStrong<StyleScopeRule>;
template struct StyleStrong<StyleStartingStyleRule>;
template <typename T>
inline void StyleOwnedSlice<T>::Clear() {
if (!len) {
return;
}
for (size_t i : IntegerRange(len)) {
ptr[i].~T();
}
free(ptr);
ptr = (T*)alignof(T);
len = 0;
}
template <typename T>
inline void StyleOwnedSlice<T>::CopyFrom(const StyleOwnedSlice& aOther) {
Clear();
len = aOther.len;
if (!len) {
ptr = (T*)alignof(T);
} else {
ptr = (T*)malloc(len * sizeof(T));
size_t i = 0;
for (const T& elem : aOther.AsSpan()) {
new (ptr + i++) T(elem);
}
}
}
template <typename T>
inline void StyleOwnedSlice<T>::SwapElements(StyleOwnedSlice& aOther) {
std::swap(ptr, aOther.ptr);
std::swap(len, aOther.len);
}
template <typename T>
inline StyleOwnedSlice<T>::StyleOwnedSlice(const StyleOwnedSlice& aOther)
: StyleOwnedSlice() {
CopyFrom(aOther);
}
template <typename T>
inline StyleOwnedSlice<T>::StyleOwnedSlice(StyleOwnedSlice&& aOther)
: StyleOwnedSlice() {
SwapElements(aOther);
}
template <typename T>
inline StyleOwnedSlice<T>::StyleOwnedSlice(Vector<T>&& aVector)
: StyleOwnedSlice() {
if (!aVector.length()) {
return;
}
MOZ_DIAGNOSTIC_ASSERT(aVector.length() == aVector.capacity(),
"Shouldn't over-allocate");
len = aVector.length();
ptr = aVector.extractRawBuffer();
MOZ_ASSERT(ptr,
"How did extractRawBuffer return null if we're not using inline "
"capacity?");
}
template <typename T>
inline StyleOwnedSlice<T>& StyleOwnedSlice<T>::operator=(
const StyleOwnedSlice& aOther) {
CopyFrom(aOther);
return *this;
}
template <typename T>
inline StyleOwnedSlice<T>& StyleOwnedSlice<T>::operator=(
StyleOwnedSlice&& aOther) {
Clear();
SwapElements(aOther);
return *this;
}
template <typename T>
inline StyleOwnedSlice<T>::~StyleOwnedSlice() {
Clear();
}
// This code is basically a C++ port of the Arc::clone() implementation in
// servo/components/servo_arc/lib.rs.
static constexpr const size_t kStaticRefcount =
std::numeric_limits<size_t>::max();
static constexpr const size_t kMaxRefcount =
std::numeric_limits<intptr_t>::max();
template <typename T>
inline void StyleArcInner<T>::IncrementRef() {
if (count.load(std::memory_order_relaxed) != kStaticRefcount) {
auto old_size = count.fetch_add(1, std::memory_order_relaxed);
if (MOZ_UNLIKELY(old_size > kMaxRefcount)) {
::abort();
}
}
}
// This is a C++ port-ish of Arc::drop().
template <typename T>
inline bool StyleArcInner<T>::DecrementRef() {
if (count.load(std::memory_order_relaxed) == kStaticRefcount) {
return false;
}
if (count.fetch_sub(1, std::memory_order_release) != 1) {
return false;
}
#ifdef MOZ_TSAN
// TSan doesn't understand std::atomic_thread_fence, so in order
// to avoid a false positive for every time a refcounted object
// is deleted, we replace the fence with an atomic operation.
count.load(std::memory_order_acquire);
#else
std::atomic_thread_fence(std::memory_order_acquire);
#endif
MOZ_LOG_DTOR(this, "ServoArc", 8);
return true;
}
template <typename H, typename T>
inline bool StyleHeaderSlice<H, T>::operator==(
const StyleHeaderSlice& aOther) const {
return header == aOther.header && AsSpan() == aOther.AsSpan();
}
template <typename H, typename T>
inline bool StyleHeaderSlice<H, T>::operator!=(
const StyleHeaderSlice& aOther) const {
return !(*this == aOther);
}
template <typename H, typename T>
inline StyleHeaderSlice<H, T>::~StyleHeaderSlice() {
for (T& elem : Span(data, len)) {
elem.~T();
}
}
template <typename H, typename T>
inline Span<const T> StyleHeaderSlice<H, T>::AsSpan() const {
// Explicitly specify template argument here to avoid instantiating Span<T>
// first and then implicitly converting to Span<const T>
return Span<const T>{data, len};
}
static constexpr const uint64_t kArcSliceCanary = 0xf3f3f3f3f3f3f3f3;
#define ASSERT_CANARY \
MOZ_DIAGNOSTIC_ASSERT(_0.p->data.header == kArcSliceCanary, "Uh?");
template <typename T>
inline StyleArcSlice<T>::StyleArcSlice()
: _0(reinterpret_cast<decltype(_0.p)>(Servo_StyleArcSlice_EmptyPtr())) {
ASSERT_CANARY
}
template <typename T>
inline StyleArcSlice<T>::StyleArcSlice(
const StyleForgottenArcSlicePtr<T>& aPtr) {
// See the forget() implementation to see why reinterpret_cast() is ok.
_0.p = reinterpret_cast<decltype(_0.p)>(aPtr._0);
ASSERT_CANARY
}
template <typename T>
inline size_t StyleArcSlice<T>::Length() const {
ASSERT_CANARY
return _0->Length();
}
template <typename T>
inline bool StyleArcSlice<T>::IsEmpty() const {
ASSERT_CANARY
return _0->IsEmpty();
}
template <typename T>
inline Span<const T> StyleArcSlice<T>::AsSpan() const {
ASSERT_CANARY
return _0->AsSpan();
}
#undef ASSERT_CANARY
template <typename T>
inline StyleArc<T>::StyleArc(const StyleArc& aOther) : p(aOther.p) {
p->IncrementRef();
}
template <typename T>
inline void StyleArc<T>::Release() {
if (MOZ_LIKELY(!p->DecrementRef())) {
return;
}
p->data.~T();
free(p);
}
template <typename T>
inline StyleArc<T>& StyleArc<T>::operator=(const StyleArc& aOther) {
if (p != aOther.p) {
Release();
p = aOther.p;
p->IncrementRef();
}
return *this;
}
template <typename T>
inline StyleArc<T>& StyleArc<T>::operator=(StyleArc&& aOther) {
std::swap(p, aOther.p);
return *this;
}
template <typename T>
inline StyleArc<T>::~StyleArc() {
Release();
}
inline bool StyleAtom::IsStatic() const { return !!(_0 & 1); }
inline nsAtom* StyleAtom::AsAtom() const {
if (IsStatic()) {
return const_cast<nsStaticAtom*>(&detail::gGkAtoms.mAtoms[_0 >> 1]);
}
return reinterpret_cast<nsAtom*>(_0);
}
inline void StyleAtom::AddRef() {
if (!IsStatic()) {
AsAtom()->AddRef();
}
}
inline void StyleAtom::Release() {
if (!IsStatic()) {
AsAtom()->Release();
}
}
inline StyleAtom::StyleAtom(already_AddRefed<nsAtom> aAtom) {
nsAtom* atom = aAtom.take();
if (atom->IsStatic()) {
size_t index = atom->AsStatic() - &detail::gGkAtoms.mAtoms[0];
_0 = (index << 1) | 1;
} else {
_0 = reinterpret_cast<uintptr_t>(atom);
}
MOZ_ASSERT(IsStatic() == atom->IsStatic());
MOZ_ASSERT(AsAtom() == atom);
}
inline StyleAtom::StyleAtom(nsStaticAtom* aAtom)
: StyleAtom(do_AddRef(static_cast<nsAtom*>(aAtom))) {}
inline StyleAtom::StyleAtom(const StyleAtom& aOther) : _0(aOther._0) {
AddRef();
}
inline StyleAtom& StyleAtom::operator=(const StyleAtom& aOther) {
if (MOZ_LIKELY(this != &aOther)) {
Release();
_0 = aOther._0;
AddRef();
}
return *this;
}
inline StyleAtom::~StyleAtom() { Release(); }
inline nsAtom* StyleCustomIdent::AsAtom() const { return _0.AsAtom(); }
inline nsDependentCSubstring StyleOwnedStr::AsString() const {
Span<const uint8_t> s = _0.AsSpan();
return nsDependentCSubstring(reinterpret_cast<const char*>(s.Elements()),
s.Length());
}
template <typename T>
inline Span<const T> StyleGenericTransform<T>::Operations() const {
return _0.AsSpan();
}
template <typename T>
inline bool StyleGenericTransform<T>::IsNone() const {
return Operations().IsEmpty();
}
inline StyleAngle StyleAngle::Zero() { return {0.0f}; }
inline float StyleAngle::ToDegrees() const { return _0; }
inline double StyleAngle::ToRadians() const {
return double(ToDegrees()) * M_PI / 180.0;
}
inline bool StyleUrlExtraData::IsShared() const { return !!(_0 & 1); }
inline StyleUrlExtraData::~StyleUrlExtraData() {
if (!IsShared()) {
reinterpret_cast<URLExtraData*>(_0)->Release();
}
}
inline const URLExtraData& StyleUrlExtraData::get() const {
if (IsShared()) {
return *URLExtraData::sShared[_0 >> 1];
}
return *reinterpret_cast<const URLExtraData*>(_0);
}
inline nsDependentCSubstring StyleCssUrl::SpecifiedSerialization() const {
return _0->serialization.AsString();
}
inline const URLExtraData& StyleCssUrl::ExtraData() const {
return _0->extra_data.get();
}
inline StyleLoadData& StyleCssUrl::LoadData() const {
if (MOZ_LIKELY(_0->load_data.tag == StyleLoadDataSource::Tag::Owned)) {
MOZ_DIAGNOSTIC_ASSERT(NS_IsMainThread() ||
dom::IsCurrentThreadRunningWorker());
return const_cast<StyleLoadData&>(_0->load_data.owned._0);
}
MOZ_DIAGNOSTIC_ASSERT(NS_IsMainThread(),
"Lazy load datas should come from user-agent sheets, "
"which don't make sense on workers");
return const_cast<StyleLoadData&>(*Servo_LoadData_GetLazy(&_0->load_data));
}
inline nsIURI* StyleCssUrl::GetURI() const {
auto& loadData = LoadData();
if (!(loadData.flags & StyleLoadDataFlags::TRIED_TO_RESOLVE_URI)) {
loadData.flags |= StyleLoadDataFlags::TRIED_TO_RESOLVE_URI;
nsDependentCSubstring serialization = SpecifiedSerialization();
//
// If the value of the url() is the empty string (like url("") or
// url()), the url must resolve to an invalid resource (similar to what
// the url about:invalid does).
//
if (!serialization.IsEmpty()) {
RefPtr<nsIURI> resolved;
NS_NewURI(getter_AddRefs(resolved), serialization, nullptr,
ExtraData().BaseURI());
loadData.resolved_uri = resolved.forget().take();
}
}
return loadData.resolved_uri;
}
inline nsDependentCSubstring StyleComputedUrl::SpecifiedSerialization() const {
return _0.SpecifiedSerialization();
}
inline const URLExtraData& StyleComputedUrl::ExtraData() const {
return _0.ExtraData();
}
inline StyleLoadData& StyleComputedUrl::LoadData() const {
return _0.LoadData();
}
inline StyleCorsMode StyleComputedUrl::CorsMode() const {
return _0._0->cors_mode;
}
inline nsIURI* StyleComputedUrl::GetURI() const { return _0.GetURI(); }
inline bool StyleComputedUrl::IsLocalRef() const {
return Servo_CssUrl_IsLocalRef(&_0);
}
inline bool StyleComputedUrl::HasRef() const {
if (IsLocalRef()) {
return true;
}
if (nsIURI* uri = GetURI()) {
bool hasRef = false;
return NS_SUCCEEDED(uri->GetHasRef(&hasRef)) && hasRef;
}
return false;
}
inline bool StyleComputedImageUrl::IsImageResolved() const {
return bool(LoadData().flags & StyleLoadDataFlags::TRIED_TO_RESOLVE_IMAGE);
}
inline imgRequestProxy* StyleComputedImageUrl::GetImage() const {
MOZ_ASSERT(IsImageResolved());
return LoadData().resolved_image;
}
template <>
inline bool StyleGradient::Repeating() const {
if (IsLinear()) {
return bool(AsLinear().flags & StyleGradientFlags::REPEATING);
}
if (IsRadial()) {
return bool(AsRadial().flags & StyleGradientFlags::REPEATING);
}
return bool(AsConic().flags & StyleGradientFlags::REPEATING);
}
template <>
bool StyleGradient::IsOpaque() const;
template <>
inline const StyleColorInterpolationMethod&
StyleGradient::ColorInterpolationMethod() const {
if (IsLinear()) {
return AsLinear().color_interpolation_method;
}
if (IsRadial()) {
return AsRadial().color_interpolation_method;
}
return AsConic().color_interpolation_method;
}
template <typename Integer>
inline StyleGenericGridLine<Integer>::StyleGenericGridLine()
: ident{StyleAtom(nsGkAtoms::_empty)}, line_num(0), is_span(false) {}
template <>
inline nsAtom* StyleGridLine::LineName() const {
return ident.AsAtom();
}
template <>
inline bool StyleGridLine::IsAuto() const {
return LineName()->IsEmpty() && line_num == 0 && !is_span;
}
using LengthPercentage = StyleLengthPercentage;
using LengthPercentageOrAuto = StyleLengthPercentageOrAuto;
using NonNegativeLengthPercentage = StyleNonNegativeLengthPercentage;
using NonNegativeLengthPercentageOrAuto =
StyleNonNegativeLengthPercentageOrAuto;
using NonNegativeLengthPercentageOrNormal =
StyleNonNegativeLengthPercentageOrNormal;
using Length = StyleLength;
using LengthOrAuto = StyleLengthOrAuto;
using NonNegativeLength = StyleNonNegativeLength;
using NonNegativeLengthOrAuto = StyleNonNegativeLengthOrAuto;
using BorderRadius = StyleBorderRadius;
bool StyleCSSPixelLength::IsZero() const { return _0 == 0.0f; }
void StyleCSSPixelLength::ScaleBy(float aScale) { _0 *= aScale; }
StyleCSSPixelLength StyleCSSPixelLength::ScaledBy(float aScale) const {
return FromPixels(ToCSSPixels() * aScale);
}
namespace detail {
static inline nscoord DefaultPercentLengthToAppUnits(float aPixelLength) {
return NSToCoordTruncClamped(aPixelLength);
}
static inline nscoord DefaultLengthToAppUnits(float aPixelLength) {
// We want to round lengths rounding 0.5 away from zero, instead of the
// default behavior of NSToCoordRound{,WithClamp} which do floor(x + 0.5).
float length = aPixelLength * float(mozilla::AppUnitsPerCSSPixel());
if (length >= float(nscoord_MAX)) {
return nscoord_MAX;
}
if (length <= float(nscoord_MIN)) {
return nscoord_MIN;
}
return NSToIntRound(length);
}
} // namespace detail
nscoord StyleCSSPixelLength::ToAppUnits() const {
if (IsZero()) {
// Avoid the expensive FP math below.
return 0;
}
return detail::DefaultLengthToAppUnits(_0);
}
bool LengthPercentage::IsLength() const { return Tag() == TAG_LENGTH; }
StyleLengthPercentageUnion::StyleLengthPercentageUnion() {
length = {TAG_LENGTH, {0.0f}};
MOZ_ASSERT(IsLength());
}
static_assert(sizeof(LengthPercentage) == sizeof(uint64_t), "");
Length& LengthPercentage::AsLength() {
MOZ_ASSERT(IsLength());
return length.length;
}
const Length& LengthPercentage::AsLength() const {
return const_cast<LengthPercentage*>(this)->AsLength();
}
bool LengthPercentage::IsPercentage() const { return Tag() == TAG_PERCENTAGE; }
StylePercentage& LengthPercentage::AsPercentage() {
MOZ_ASSERT(IsPercentage());
return percentage.percentage;
}
const StylePercentage& LengthPercentage::AsPercentage() const {
return const_cast<LengthPercentage*>(this)->AsPercentage();
}
bool LengthPercentage::IsCalc() const { return Tag() == TAG_CALC; }
StyleCalcLengthPercentage& LengthPercentage::AsCalc() {
MOZ_ASSERT(IsCalc());
// NOTE: in 32-bits, the pointer is not swapped, and goes along with the tag.
#ifdef SERVO_32_BITS
return *calc.ptr;
#else
return *reinterpret_cast<StyleCalcLengthPercentage*>(
NativeEndian::swapFromLittleEndian(calc.ptr));
#endif
}
const StyleCalcLengthPercentage& LengthPercentage::AsCalc() const {
return const_cast<LengthPercentage*>(this)->AsCalc();
}
StyleLengthPercentageUnion::StyleLengthPercentageUnion(const Self& aOther) {
if (aOther.IsLength()) {
length = {TAG_LENGTH, aOther.AsLength()};
} else if (aOther.IsPercentage()) {
percentage = {TAG_PERCENTAGE, aOther.AsPercentage()};
} else {
MOZ_ASSERT(aOther.IsCalc());
auto* ptr = new StyleCalcLengthPercentage(aOther.AsCalc());
// NOTE: in 32-bits, the pointer is not swapped, and goes along with the
// tag.
calc = {
#ifdef SERVO_32_BITS
TAG_CALC,
ptr,
#else
NativeEndian::swapToLittleEndian(reinterpret_cast<uintptr_t>(ptr)),
#endif
};
}
MOZ_ASSERT(Tag() == aOther.Tag());
}
StyleLengthPercentageUnion::~StyleLengthPercentageUnion() {
if (IsCalc()) {
delete &AsCalc();
}
}
LengthPercentage& LengthPercentage::operator=(const LengthPercentage& aOther) {
if (this != &aOther) {
this->~LengthPercentage();
new (this) LengthPercentage(aOther);
}
return *this;
}
bool LengthPercentage::operator==(const LengthPercentage& aOther) const {
if (Tag() != aOther.Tag()) {
return false;
}
if (IsLength()) {
return AsLength() == aOther.AsLength();
}
if (IsPercentage()) {
return AsPercentage() == aOther.AsPercentage();
}
return AsCalc() == aOther.AsCalc();
}
bool LengthPercentage::operator!=(const LengthPercentage& aOther) const {
return !(*this == aOther);
}
LengthPercentage LengthPercentage::Zero() { return {}; }
LengthPercentage LengthPercentage::FromPixels(CSSCoord aCoord) {
LengthPercentage l;
MOZ_ASSERT(l.IsLength());
l.length.length = {aCoord};
return l;
}
LengthPercentage LengthPercentage::FromAppUnits(nscoord aCoord) {
return FromPixels(CSSPixel::FromAppUnits(aCoord));
}
LengthPercentage LengthPercentage::FromPercentage(float aPercentage) {
LengthPercentage l;
l.percentage = {TAG_PERCENTAGE, {aPercentage}};
return l;
}
bool LengthPercentage::HasPercent() const { return IsPercentage() || IsCalc(); }
bool LengthPercentage::ConvertsToLength() const { return IsLength(); }
nscoord LengthPercentage::ToLength() const {
MOZ_ASSERT(ConvertsToLength());
return AsLength().ToAppUnits();
}
CSSCoord LengthPercentage::ToLengthInCSSPixels() const {
MOZ_ASSERT(ConvertsToLength());
return AsLength().ToCSSPixels();
}
bool LengthPercentage::ConvertsToPercentage() const { return IsPercentage(); }
float LengthPercentage::ToPercentage() const {
MOZ_ASSERT(ConvertsToPercentage());
return AsPercentage()._0;
}
bool LengthPercentage::HasLengthAndPercentage() const {
if (!IsCalc()) {
return false;
}
MOZ_ASSERT(!ConvertsToLength() && !ConvertsToPercentage(),
"Should've been simplified earlier");
return true;
}
bool LengthPercentage::IsDefinitelyZero() const {
if (IsLength()) {
return AsLength().IsZero();
}
if (IsPercentage()) {
return AsPercentage()._0 == 0.0f;
}
// calc() should've been simplified to a percentage.
return false;
}
CSSCoord StyleCalcLengthPercentage::ResolveToCSSPixels(CSSCoord aBasis) const {
return Servo_ResolveCalcLengthPercentage(this, aBasis);
}
nscoord StyleCalcLengthPercentage::Resolve(nscoord aBasis) const {
return detail::DefaultLengthToAppUnits(
ResolveToCSSPixels(CSSPixel::FromAppUnits(aBasis)));
}
template <>
void StyleCalcNode::ScaleLengthsBy(float);
CSSCoord LengthPercentage::ResolveToCSSPixels(CSSCoord aPercentageBasis) const {
if (IsLength()) {
return AsLength().ToCSSPixels();
}
if (IsPercentage()) {
return AsPercentage()._0 * aPercentageBasis;
}
return AsCalc().ResolveToCSSPixels(aPercentageBasis);
}
template <typename T>
CSSCoord LengthPercentage::ResolveToCSSPixelsWith(T aPercentageGetter) const {
static_assert(std::is_same_v<decltype(aPercentageGetter()), CSSCoord>);
if (ConvertsToLength()) {
return ToLengthInCSSPixels();
}
return ResolveToCSSPixels(aPercentageGetter());
}
template <typename T, typename PercentRounder>
nscoord LengthPercentage::Resolve(T aPercentageGetter,
PercentRounder aPercentRounder) const {
static_assert(std::is_same_v<decltype(aPercentageGetter()), nscoord>);
static_assert(std::is_same_v<decltype(aPercentRounder(1.0f)), nscoord>);
if (ConvertsToLength()) {
return ToLength();
}
if (IsPercentage() && AsPercentage()._0 == 0.0f) {
return 0;
}
nscoord basis = aPercentageGetter();
if (IsPercentage()) {
return aPercentRounder(basis * AsPercentage()._0);
}
return AsCalc().Resolve(basis);
}
nscoord LengthPercentage::Resolve(nscoord aPercentageBasis) const {
return Resolve([=] { return aPercentageBasis; },
detail::DefaultPercentLengthToAppUnits);
}
template <typename T>
nscoord LengthPercentage::Resolve(T aPercentageGetter) const {
return Resolve(aPercentageGetter, detail::DefaultPercentLengthToAppUnits);
}
template <typename PercentRounder>
nscoord LengthPercentage::Resolve(nscoord aPercentageBasis,
PercentRounder aPercentRounder) const {
return Resolve([aPercentageBasis] { return aPercentageBasis; },
aPercentRounder);
}
void LengthPercentage::ScaleLengthsBy(float aScale) {
if (IsLength()) {
AsLength().ScaleBy(aScale);
}
if (IsCalc()) {
AsCalc().node.ScaleLengthsBy(aScale);
}
}
#define IMPL_LENGTHPERCENTAGE_FORWARDS(ty_) \
template <> \
inline bool ty_::HasPercent() const { \
return IsLengthPercentage() && AsLengthPercentage().HasPercent(); \
} \
template <> \
inline bool ty_::ConvertsToLength() const { \
return IsLengthPercentage() && AsLengthPercentage().ConvertsToLength(); \
} \
template <> \
inline bool ty_::HasLengthAndPercentage() const { \
return IsLengthPercentage() && \
AsLengthPercentage().HasLengthAndPercentage(); \
} \
template <> \
inline nscoord ty_::ToLength() const { \
MOZ_ASSERT(ConvertsToLength()); \
return AsLengthPercentage().ToLength(); \
} \
template <> \
inline bool ty_::ConvertsToPercentage() const { \
return IsLengthPercentage() && \
AsLengthPercentage().ConvertsToPercentage(); \
} \
template <> \
inline float ty_::ToPercentage() const { \
MOZ_ASSERT(ConvertsToPercentage()); \
return AsLengthPercentage().ToPercentage(); \
}
IMPL_LENGTHPERCENTAGE_FORWARDS(LengthPercentageOrAuto)
IMPL_LENGTHPERCENTAGE_FORWARDS(StyleSize)
IMPL_LENGTHPERCENTAGE_FORWARDS(StyleMaxSize)
template <>
inline bool LengthOrAuto::IsLength() const {
return IsLengthPercentage();
}
template <>
inline const Length& LengthOrAuto::AsLength() const {
return AsLengthPercentage();
}
template <>
inline nscoord LengthOrAuto::ToLength() const {
return AsLength().ToAppUnits();
}
template <>
inline bool StyleFlexBasis::IsAuto() const {
return IsSize() && AsSize().IsAuto();
}
template <>
inline bool StyleSize::BehavesLikeInitialValueOnBlockAxis() const {
return IsAuto() || !IsLengthPercentage();
}
template <>
inline bool StyleMaxSize::BehavesLikeInitialValueOnBlockAxis() const {
return IsNone() || !IsLengthPercentage();
}
template <>
inline bool StyleBackgroundSize::IsInitialValue() const {
return IsExplicitSize() && explicit_size.width.IsAuto() &&
explicit_size.height.IsAuto();
}
template <typename T>
const T& StyleRect<T>::Get(mozilla::Side aSide) const {
static_assert(sizeof(StyleRect<T>) == sizeof(T) * 4, "");
static_assert(alignof(StyleRect<T>) == alignof(T), "");
return reinterpret_cast<const T*>(this)[aSide];
}
template <typename T>
T& StyleRect<T>::Get(mozilla::Side aSide) {
return const_cast<T&>(static_cast<const StyleRect&>(*this).Get(aSide));
}
template <typename T>
template <typename Predicate>
bool StyleRect<T>::All(Predicate aPredicate) const {
return aPredicate(_0) && aPredicate(_1) && aPredicate(_2) && aPredicate(_3);
}
template <typename T>
template <typename Predicate>
bool StyleRect<T>::Any(Predicate aPredicate) const {
return aPredicate(_0) || aPredicate(_1) || aPredicate(_2) || aPredicate(_3);
}
template <>
inline const LengthPercentage& BorderRadius::Get(HalfCorner aCorner) const {
static_assert(sizeof(BorderRadius) == sizeof(LengthPercentage) * 8, "");
static_assert(alignof(BorderRadius) == alignof(LengthPercentage), "");
const auto* self = reinterpret_cast<const LengthPercentage*>(this);
return self[aCorner];
}
template <>
inline bool StyleTrackBreadth::HasPercent() const {
return IsBreadth() && AsBreadth().HasPercent();
}
// Implemented in nsStyleStructs.cpp
template <>
bool StyleTransform::HasPercent() const;
template <>
inline bool StyleTransformOrigin::HasPercent() const {
// NOTE(emilio): `depth` is just a `<length>` so doesn't have a percentage at
// all.
return horizontal.HasPercent() || vertical.HasPercent();
}
template <>
inline Maybe<size_t> StyleGridTemplateComponent::RepeatAutoIndex() const {
if (!IsTrackList()) {
return Nothing();
}
const auto& list = *AsTrackList();
return list.auto_repeat_index < list.values.Length()
? Some(list.auto_repeat_index)
: Nothing();
}
template <>
inline bool StyleGridTemplateComponent::HasRepeatAuto() const {
return RepeatAutoIndex().isSome();
}
template <>
inline Span<const StyleGenericTrackListValue<LengthPercentage, StyleInteger>>
StyleGridTemplateComponent::TrackListValues() const {
if (IsTrackList()) {
return AsTrackList()->values.AsSpan();
}
return {};
}
template <>
inline const StyleGenericTrackRepeat<LengthPercentage, StyleInteger>*
StyleGridTemplateComponent::GetRepeatAutoValue() const {
auto index = RepeatAutoIndex();
if (!index) {
return nullptr;
}
return &TrackListValues()[*index].AsTrackRepeat();
}
constexpr const auto kPaintOrderShift = StylePAINT_ORDER_SHIFT;
constexpr const auto kPaintOrderMask = StylePAINT_ORDER_MASK;
template <>
inline nsRect StyleGenericClipRect<LengthOrAuto>::ToLayoutRect(
nscoord aAutoSize) const {
nscoord x = left.IsLength() ? left.ToLength() : 0;
nscoord y = top.IsLength() ? top.ToLength() : 0;
nscoord width = right.IsLength() ? right.ToLength() - x : aAutoSize;
nscoord height = bottom.IsLength() ? bottom.ToLength() - y : aAutoSize;
return nsRect(x, y, width, height);
}
using RestyleHint = StyleRestyleHint;
inline RestyleHint RestyleHint::RestyleSubtree() {
return RESTYLE_SELF | RESTYLE_DESCENDANTS;
}
inline RestyleHint RestyleHint::RecascadeSubtree() {
return RECASCADE_SELF | RECASCADE_DESCENDANTS;
}
inline RestyleHint RestyleHint::ForAnimations() {
return RESTYLE_CSS_TRANSITIONS | RESTYLE_CSS_ANIMATIONS | RESTYLE_SMIL;
}
inline bool RestyleHint::DefinitelyRecascadesAllSubtree() const {
if (!(*this & (RECASCADE_DESCENDANTS | RESTYLE_DESCENDANTS))) {
return false;
}
return bool(*this & (RESTYLE_SELF | RECASCADE_SELF));
}
template <>
ImageResolution StyleImage::GetResolution(const ComputedStyle&) const;
template <>
inline const StyleImage& StyleImage::FinalImage() const {
if (!IsImageSet()) {
return *this;
}
const auto& set = *AsImageSet();
auto items = set.items.AsSpan();
if (MOZ_LIKELY(set.selected_index < items.Length())) {
return items[set.selected_index].image.FinalImage();
}
static auto sNone = StyleImage::None();
return sNone;
}
template <>
inline bool StyleImage::IsImageRequestType() const {
const auto& finalImage = FinalImage();
return finalImage.IsUrl();
}
template <>
inline const StyleComputedImageUrl* StyleImage::GetImageRequestURLValue()
const {
const auto& finalImage = FinalImage();
if (finalImage.IsUrl()) {
return &finalImage.AsUrl();
}
return nullptr;
}
template <>
inline imgRequestProxy* StyleImage::GetImageRequest() const {
const auto* url = GetImageRequestURLValue();
return url ? url->GetImage() : nullptr;
}
template <>
inline bool StyleImage::IsResolved() const {
const auto* url = GetImageRequestURLValue();
return !url || url->IsImageResolved();
}
template <>
bool StyleImage::IsOpaque() const;
template <>
bool StyleImage::IsSizeAvailable() const;
template <>
bool StyleImage::IsComplete() const;
template <>
void StyleImage::ResolveImage(dom::Document&, const StyleImage*);
template <>
inline AspectRatio StyleRatio<StyleNonNegativeNumber>::ToLayoutRatio(
UseBoxSizing aUseBoxSizing) const {
// 0/1, 1/0, and 0/0 are all degenerate ratios (which behave as auto), and we
// always return 0.0f.
return AspectRatio::FromSize(_0, _1, aUseBoxSizing);
}
template <>
inline AspectRatio StyleAspectRatio::ToLayoutRatio() const {
return HasRatio() ? ratio.AsRatio().ToLayoutRatio(auto_ ? UseBoxSizing::No
: UseBoxSizing::Yes)
: AspectRatio();
}
inline void StyleFontWeight::ToString(nsACString& aString) const {
Servo_FontWeight_ToCss(this, &aString);
}
inline void StyleFontStretch::ToString(nsACString& aString) const {
Servo_FontStretch_ToCss(this, &aString);
}
inline void StyleFontStyle::ToString(nsACString& aString) const {
Servo_FontStyle_ToCss(this, &aString);
}
inline bool StyleFontWeight::IsBold() const { return *this >= BOLD_THRESHOLD; }
inline bool StyleFontStyle::IsItalic() const { return *this == ITALIC; }
inline bool StyleFontStyle::IsOblique() const {
return !IsItalic() && !IsNormal();
}
inline float StyleFontStyle::ObliqueAngle() const {
MOZ_ASSERT(IsOblique());
return ToFloat();
}
inline float StyleFontStyle::SlantAngle() const {
return IsNormal() ? 0 : IsItalic() ? DEFAULT_OBLIQUE_DEGREES : ObliqueAngle();
}
using FontStretch = StyleFontStretch;
using FontSlantStyle = StyleFontStyle;
using FontWeight = StyleFontWeight;
template <>
inline double StyleComputedTimingFunction::At(double aPortion,
bool aBeforeFlag) const {
return Servo_EasingFunctionAt(
this, aPortion,
aBeforeFlag ? StyleEasingBeforeFlag::Set : StyleEasingBeforeFlag::Unset);
}
template <>
inline void StyleComputedTimingFunction::AppendToString(
nsACString& aOut) const {
return Servo_SerializeEasing(this, &aOut);
}
template <>
inline double StyleComputedTimingFunction::GetPortion(
const Maybe<StyleComputedTimingFunction>& aFn, double aPortion,
bool aBeforeFlag) {
return aFn ? aFn->At(aPortion, aBeforeFlag) : aPortion;
}
/* static */
template <>
inline LengthPercentageOrAuto LengthPercentageOrAuto::Zero() {
return LengthPercentage(LengthPercentage::Zero());
}
template <>
inline StyleViewTimelineInset::StyleGenericViewTimelineInset()
: start(LengthPercentageOrAuto::Auto()),
end(LengthPercentageOrAuto::Auto()) {}
inline StyleDisplayOutside StyleDisplay::Outside() const {
return StyleDisplayOutside((_0 & OUTSIDE_MASK) >> OUTSIDE_SHIFT);
}
inline StyleDisplayInside StyleDisplay::Inside() const {
return StyleDisplayInside(_0 & INSIDE_MASK);
}
inline bool StyleDisplay::IsListItem() const { return _0 & LIST_ITEM_MASK; }
inline bool StyleDisplay::IsInternalTable() const {
return Outside() == StyleDisplayOutside::InternalTable;
}
inline bool StyleDisplay::IsInternalTableExceptCell() const {
return IsInternalTable() && *this != TableCell;
}
inline bool StyleDisplay::IsInternalRuby() const {
return Outside() == StyleDisplayOutside::InternalRuby;
}
inline bool StyleDisplay::IsRuby() const {
return Inside() == StyleDisplayInside::Ruby || IsInternalRuby();
}
inline bool StyleDisplay::IsInlineFlow() const {
return Outside() == StyleDisplayOutside::Inline &&
Inside() == StyleDisplayInside::Flow;
}
inline bool StyleDisplay::IsInlineInside() const {
return IsInlineFlow() || IsRuby();
}
inline bool StyleDisplay::IsInlineOutside() const {
return Outside() == StyleDisplayOutside::Inline || IsInternalRuby();
}
inline float StyleZoom::Zoom(float aValue) const {
if (*this == ONE) {
return aValue;
}
return ToFloat() * aValue;
}
inline float StyleZoom::Unzoom(float aValue) const {
if (*this == ONE) {
return aValue;
}
return aValue / ToFloat();
}
inline nscoord StyleZoom::ZoomCoord(nscoord aValue) const {
if (*this == ONE) {
return aValue;
}
return NSToCoordRoundWithClamp(Zoom(float(aValue)));
}
inline nscoord StyleZoom::UnzoomCoord(nscoord aValue) const {
if (*this == ONE) {
return aValue;
}
return NSToCoordRoundWithClamp(Unzoom(float(aValue)));
}
inline nsSize StyleZoom::Zoom(const nsSize& aValue) const {
if (*this == ONE) {
return aValue;
}
return nsSize(ZoomCoord(aValue.Width()), ZoomCoord(aValue.Height()));
}
inline nsSize StyleZoom::Unzoom(const nsSize& aValue) const {
if (*this == ONE) {
return aValue;
}
return nsSize(UnzoomCoord(aValue.Width()), UnzoomCoord(aValue.Height()));
}
inline nsPoint StyleZoom::Zoom(const nsPoint& aValue) const {
if (*this == ONE) {
return aValue;
}
return nsPoint(ZoomCoord(aValue.X()), ZoomCoord(aValue.Y()));
}
inline nsPoint StyleZoom::Unzoom(const nsPoint& aValue) const {
if (*this == ONE) {
return aValue;
}
return nsPoint(UnzoomCoord(aValue.X()), UnzoomCoord(aValue.Y()));
}
inline nsRect StyleZoom::Zoom(const nsRect& aValue) const {
if (*this == ONE) {
return aValue;
}
return nsRect(ZoomCoord(aValue.X()), ZoomCoord(aValue.Y()),
ZoomCoord(aValue.Width()), ZoomCoord(aValue.Height()));
}
inline nsRect StyleZoom::Unzoom(const nsRect& aValue) const {
if (*this == ONE) {
return aValue;
}
return nsRect(UnzoomCoord(aValue.X()), UnzoomCoord(aValue.Y()),
UnzoomCoord(aValue.Width()), UnzoomCoord(aValue.Height()));
}
template <>
inline gfx::Point StyleCoordinatePair<StyleCSSFloat>::ToGfxPoint(
const CSSSize* aBasis) const {
return gfx::Point(x, y);
}
template <>
inline gfx::Point StyleCoordinatePair<LengthPercentage>::ToGfxPoint(
const CSSSize* aBasis) const {
MOZ_ASSERT(aBasis);
return gfx::Point(x.ResolveToCSSPixels(aBasis->Width()),
y.ResolveToCSSPixels(aBasis->Height()));
}
} // namespace mozilla
#endif