tor-browser

ServoStyleConstsForwards.h (6945B)

---

/* 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 https://mozilla.org/MPL/2.0/. */

/*
* This file contains forward declarations and typedefs for types that cbindgen
* cannot understand but renames / prefixes, and includes for some of the types
* it needs.
*/

#ifndef mozilla_ServoStyleConsts_h
#  error "This file is only meant to be included from ServoStyleConsts.h"
#endif

#ifndef mozilla_ServoStyleConstsForwards_h
#  define mozilla_ServoStyleConstsForwards_h

#  include <atomic>

#  include "NonCustomCSSPropertyId.h"
#  include "Units.h"
#  include "mozilla/AtomArray.h"
#  include "mozilla/CORSMode.h"
#  include "mozilla/MemoryReporting.h"
#  include "mozilla/ServoBindingTypes.h"
#  include "mozilla/ServoTypes.h"
#  include "mozilla/gfx/Types.h"
#  include "mozilla/image/Resolution.h"
#  include "nsColor.h"
#  include "nsCompatibility.h"
#  include "nsCoord.h"
#  include "nsIURI.h"

struct RawServoAnimationValueTable;

class nsAtom;
class nsIFrame;
class nsINode;
class nsIContent;
class nsCSSPropertyIDSet;
class nsPresContext;
class nsSimpleContentList;
class imgRequestProxy;
struct nsCSSValueSharedList;
struct AnchorPosResolutionParams;
struct AnchorPosOffsetResolutionParams;
class gfxFontFeatureValueSet;
struct GeckoFontMetrics;
namespace mozilla {

// Forward declaration for `StyleLengthPercentageUnion::AsCalc`, which
// references the type below in the generated code.
struct StyleCalcLengthPercentage;

namespace gfx {
struct FontVariation;
struct FontFeature;
}  // namespace gfx
}  // namespace mozilla
using gfxFontVariation = mozilla::gfx::FontVariation;
using gfxFontFeature = mozilla::gfx::FontFeature;

enum nsCSSUnit : uint32_t;
enum nsChangeHint : uint32_t;

namespace nsStyleTransformMatrix {
enum class MatrixTransformOperator : uint8_t;
}

template <typename T>
class nsMainThreadPtrHolder;

namespace mozilla {

class ComputedStyle;

using Matrix4x4Components = float[16];
using StyleMatrix4x4Components = Matrix4x4Components;

// This is sound because std::num::NonZeroUsize is repr(transparent).
//
// It is just the case that cbindgen doesn't understand it natively.
using StyleNonZeroUsize = uintptr_t;

struct Keyframe;
struct PropertyStyleAnimationValuePair;

using ComputedKeyframeValues = nsTArray<PropertyStyleAnimationValuePair>;

class ComputedStyle;
enum class LogicalAxis : uint8_t;
enum class PhysicalAxis : uint8_t;
class SeenPtrs;
class SharedFontList;
class StyleSheet;
class WritingMode;
class ServoElementSnapshotTable;
class StyleParserState;

template <typename T>
struct StyleForgottenArcSlicePtr;

struct AnimationPropertySegment;
struct AspectRatio;
struct ComputedTiming;
struct CSSPropertyId;
struct URLExtraData;

enum HalfCorner : uint8_t;
enum class LogicalSide : uint8_t;
enum class PseudoStyleType : uint8_t;
enum class OriginFlags : uint8_t;
enum class UseBoxSizing : uint8_t;

template <typename L>
union StyleGenericCalcNode;

namespace css {
class Loader;
class LoaderReusableStyleSheets;
class SheetLoadData;
using SheetLoadDataHolder = nsMainThreadPtrHolder<SheetLoadData>;
enum SheetParsingMode : uint8_t;
}  // namespace css

namespace dom {
enum class IterationCompositeOperation : uint8_t;
enum class CallerType : uint32_t;

class Element;
class Document;

}  // namespace dom

// Replacement for a Rust Box<T> for a non-dynamically-sized-type.
//
// TODO(emilio): If this was some sort of nullable box then this could be made
// to work with moves, and also reduce memory layout size of stuff, potentially.
template <typename T>
struct StyleBox {
 explicit StyleBox(UniquePtr<T> aPtr) : mRaw(aPtr.release()) {
   MOZ_DIAGNOSTIC_ASSERT(mRaw);
 }

 ~StyleBox() {
   MOZ_DIAGNOSTIC_ASSERT(mRaw);
   delete mRaw;
 }

 StyleBox(const StyleBox& aOther) : StyleBox(MakeUnique<T>(*aOther)) {}

 StyleBox& operator=(const StyleBox& aOther) const {
   delete mRaw;
   mRaw = MakeUnique<T>(*aOther).release();
   return *this;
 }

 const T* operator->() const {
   MOZ_DIAGNOSTIC_ASSERT(mRaw);
   return mRaw;
 }

 const T& operator*() const {
   MOZ_DIAGNOSTIC_ASSERT(mRaw);
   return *mRaw;
 }

 T* operator->() {
   MOZ_DIAGNOSTIC_ASSERT(mRaw);
   return mRaw;
 }

 T& operator*() {
   MOZ_DIAGNOSTIC_ASSERT(mRaw);
   return *mRaw;
 }

 bool operator==(const StyleBox& aOther) const { return *(*this) == *aOther; }

 bool operator!=(const StyleBox& aOther) const { return *(*this) != *aOther; }

private:
 T* mRaw;
};

// Work-around weird cbindgen renaming / avoiding moving stuff outside its
// namespace.

using StyleLoader = css::Loader;
using StyleLoaderReusableStyleSheets = css::LoaderReusableStyleSheets;
using StyleCallerType = dom::CallerType;
using StyleSheetParsingMode = css::SheetParsingMode;
using StyleSheetLoadData = css::SheetLoadData;
using StyleSheetLoadDataHolder = css::SheetLoadDataHolder;
using StyleGeckoMallocSizeOf = MallocSizeOf;
using StyleDomStyleSheet = StyleSheet;

using StyleRawGeckoNode = nsINode;
using StyleRawGeckoElement = dom::Element;
using StyleDocument = dom::Document;
using StyleComputedValues = ComputedStyle;
using StyleIterationCompositeOperation = dom::IterationCompositeOperation;

using StyleMatrixTransformOperator =
   nsStyleTransformMatrix::MatrixTransformOperator;

#  define SERVO_LOCKED_ARC_TYPE(name_) struct StyleLocked##type_;
#  include "mozilla/ServoLockedArcTypeList.h"
#  undef SERVO_LOCKED_ARC_TYPE

#  define SERVO_BOXED_TYPE(name_, type_) struct Style##type_;
#  include "mozilla/ServoBoxedTypeList.h"
#  undef SERVO_BOXED_TYPE

using StyleAtomicUsize = std::atomic<size_t>;

#  define SERVO_FIXED_POINT_HELPERS(T, RawT, FractionBits)                     \
   static constexpr RawT kPointFive = 1 << (FractionBits - 1);                \
   static constexpr uint16_t kScale = 1 << FractionBits;                      \
   static constexpr float kInverseScale = 1.0f / kScale;                      \
   static T FromRaw(RawT aRaw) { return {{aRaw}}; }                           \
   static T FromFloat(float aFloat) {                                         \
     return FromRaw(RawT(aFloat * kScale));                                   \
   }                                                                          \
   static T FromInt(RawT aInt) { return FromRaw(RawT(aInt * kScale)); }       \
   RawT Raw() const { return _0.value; }                                      \
   uint16_t UnsignedRaw() const { return uint16_t(Raw()); }                   \
   float ToFloat() const { return Raw() * kInverseScale; }                    \
   RawT ToIntRounded() const { return (Raw() + kPointFive) >> FractionBits; } \
   inline void ToString(nsACString&) const;

}  // namespace mozilla

#  ifndef HAVE_64BIT_BUILD
static_assert(sizeof(void*) == 4, "");
#    define SERVO_32_BITS 1
#  endif
#  define CBINDGEN_IS_GECKO

#endif