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gecko-dev/layout/style/nsStyleCoord.h

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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
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
/* representation of length values in computed style data */
#ifndef nsStyleCoord_h___
#define nsStyleCoord_h___
#include <type_traits>
#include "mozilla/EnumTypeTraits.h"
#include "mozilla/gfx/Types.h"
#include "Units.h"
#include "nsCoord.h"
#include "nsISupportsImpl.h"
#include "nsStyleConsts.h"
namespace mozilla {
class WritingMode;
// Logical axis, edge, side and corner constants for use in various places.
enum LogicalAxis { eLogicalAxisBlock = 0x0, eLogicalAxisInline = 0x1 };
enum LogicalEdge { eLogicalEdgeStart = 0x0, eLogicalEdgeEnd = 0x1 };
enum LogicalSide : uint8_t {
eLogicalSideBStart = (eLogicalAxisBlock << 1) | eLogicalEdgeStart, // 0x0
eLogicalSideBEnd = (eLogicalAxisBlock << 1) | eLogicalEdgeEnd, // 0x1
eLogicalSideIStart = (eLogicalAxisInline << 1) | eLogicalEdgeStart, // 0x2
eLogicalSideIEnd = (eLogicalAxisInline << 1) | eLogicalEdgeEnd // 0x3
};
enum LogicalCorner {
eLogicalCornerBStartIStart = 0,
eLogicalCornerBStartIEnd = 1,
eLogicalCornerBEndIEnd = 2,
eLogicalCornerBEndIStart = 3
};
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; }
nscoord StyleCSSPixelLength::ToAppUnits() const {
// We want to resolve the length part of the calc() expression rounding 0.5
// away from zero, instead of the default behavior of
// NSToCoordRound{,WithClamp} which do floor(x + 0.5).
//
// This is what the rust code in the app_units crate does, and not doing this
// would regress bug 1323735, for example.
//
// FIXME(emilio, bug 1528114): Probably we should do something smarter.
float length = _0 * float(mozilla::AppUnitsPerCSSPixel());
if (length >= nscoord_MAX) {
return nscoord_MAX;
}
if (length <= nscoord_MIN) {
return nscoord_MIN;
}
return NSToIntRound(length);
}
constexpr LengthPercentage LengthPercentage::Zero() {
return {{0.}, {0.}, StyleAllowedNumericType::All, false, false};
}
LengthPercentage LengthPercentage::FromPixels(CSSCoord aCoord) {
return {{aCoord}, {0.}, StyleAllowedNumericType::All, false, false};
}
LengthPercentage LengthPercentage::FromAppUnits(nscoord aCoord) {
return LengthPercentage::FromPixels(CSSPixel::FromAppUnits(aCoord));
}
LengthPercentage LengthPercentage::FromPercentage(float aPercentage) {
return {{0.}, {aPercentage}, StyleAllowedNumericType::All, true, false};
}
CSSCoord LengthPercentage::LengthInCSSPixels() const { return length._0; }
float LengthPercentage::Percentage() const { return percentage._0; }
bool LengthPercentage::HasPercent() const { return has_percentage; }
bool LengthPercentage::ConvertsToLength() const { return !HasPercent(); }
nscoord LengthPercentage::ToLength() const {
MOZ_ASSERT(ConvertsToLength());
return length.ToAppUnits();
}
bool LengthPercentage::ConvertsToPercentage() const {
return has_percentage && length.IsZero();
}
float LengthPercentage::ToPercentage() const {
MOZ_ASSERT(ConvertsToPercentage());
return Percentage();
}
bool LengthPercentage::HasLengthAndPercentage() const {
return !ConvertsToLength() && !ConvertsToPercentage();
}
bool LengthPercentage::IsDefinitelyZero() const {
return length.IsZero() && Percentage() == 0.0f;
}
CSSCoord LengthPercentage::ResolveToCSSPixels(CSSCoord aPercentageBasis) const {
return LengthInCSSPixels() + Percentage() * aPercentageBasis;
}
template <typename T>
CSSCoord LengthPercentage::ResolveToCSSPixelsWith(T aPercentageGetter) const {
static_assert(std::is_same<decltype(aPercentageGetter()), CSSCoord>::value,
"Should return CSS pixels");
if (ConvertsToLength()) {
return LengthInCSSPixels();
}
return ResolveToCSSPixels(aPercentageGetter());
}
template <typename T, typename U>
nscoord LengthPercentage::Resolve(T aPercentageGetter,
U aPercentageRounder) const {
static_assert(std::is_same<decltype(aPercentageGetter()), nscoord>::value,
"Should return app units");
static_assert(
std::is_same<decltype(aPercentageRounder(1.0f)), nscoord>::value,
"Should return app units");
if (ConvertsToLength()) {
return ToLength();
}
nscoord basis = aPercentageGetter();
return length.ToAppUnits() + aPercentageRounder(basis * Percentage());
}
nscoord LengthPercentage::Resolve(nscoord aPercentageBasis) const {
return Resolve([=] { return aPercentageBasis; }, NSToCoordFloorClamped);
}
template <typename T>
nscoord LengthPercentage::Resolve(T aPercentageGetter) const {
static_assert(std::is_same<decltype(aPercentageGetter()), nscoord>::value,
"Should return app units");
return Resolve(aPercentageGetter, NSToCoordFloorClamped);
}
template <typename T>
nscoord LengthPercentage::Resolve(nscoord aPercentageBasis,
T aPercentageRounder) const {
return Resolve([=] { return aPercentageBasis; }, aPercentageRounder);
}
#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 bool StyleFlexBasis::IsAuto() const {
return IsSize() && AsSize().IsAuto();
}
template <>
inline bool StyleSize::BehavesLikeInitialValueOnBlockAxis() const {
return IsAuto() || IsExtremumLength();
}
template <>
inline bool StyleMaxSize::BehavesLikeInitialValueOnBlockAxis() const {
return IsNone() || IsExtremumLength();
}
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>
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), "");
auto* self = reinterpret_cast<const LengthPercentage*>(this);
return self[aCorner];
}
} // namespace mozilla
enum nsStyleUnit : uint8_t {
eStyleUnit_Null = 0, // (no value) value is not specified
eStyleUnit_Normal = 1, // (no value)
eStyleUnit_Auto = 2, // (no value)
eStyleUnit_None = 3, // (no value)
eStyleUnit_Percent = 10, // (float) 1.0 == 100%
eStyleUnit_Factor = 11, // (float) a multiplier
eStyleUnit_Degree = 12, // (float) angle in degrees
eStyleUnit_FlexFraction = 16, // (float) <flex> in fr units
eStyleUnit_Coord = 20, // (nscoord) value is twips
eStyleUnit_Integer = 30, // (int) value is simple integer
eStyleUnit_Enumerated = 32, // (int) value has enumerated meaning
// The following are reference counted allocated types.
eStyleUnit_Calc = 40, // (Calc*) calc() toplevel; always present
// to distinguish 50% from calc(50%), etc.
eStyleUnit_MAX = 40 // highest valid nsStyleUnit value
};
typedef union {
int32_t mInt; // nscoord is a int32_t for now
float mFloat;
// An mPointer is a reference counted pointer. Currently this can only
// ever be an nsStyleCoord::Calc*.
void* mPointer;
} nsStyleUnion;
/**
* Class that hold a single size specification used by the style
* system. The size specification consists of two parts -- a number
* and a unit. The number is an integer, a floating point value, an
* nscoord, or undefined, and the unit is an nsStyleUnit. Checking
* the unit is a must before asking for the value in any particular
* form.
*/
/** <div rustbindgen private accessor="unsafe"></div> */
class nsStyleCoord {
public:
// Non-reference counted calc() value. See nsStyleStruct.h for some uses
// of this.
struct CalcValue {
// Every calc() expression evaluates to a length plus a percentage.
nscoord mLength;
float mPercent;
bool mHasPercent; // whether there was any % syntax, even if 0
bool operator==(const CalcValue& aOther) const {
return mLength == aOther.mLength && mPercent == aOther.mPercent &&
mHasPercent == aOther.mHasPercent;
}
bool operator!=(const CalcValue& aOther) const {
return !(*this == aOther);
}
nscoord ToLength() const {
MOZ_ASSERT(!mHasPercent);
return mLength;
}
// If this returns true the value is definitely zero. It it returns false
// it might be zero. So it's best used for conservative optimization.
bool IsDefinitelyZero() const { return mLength == 0 && mPercent == 0; }
};
// Reference counted calc() value. This is the type that is used to store
// the calc() value in nsStyleCoord.
struct Calc final : public CalcValue {
NS_INLINE_DECL_THREADSAFE_REFCOUNTING(Calc)
Calc() {}
private:
Calc(const Calc&) = delete;
~Calc() {}
Calc& operator=(const Calc&) = delete;
};
explicit nsStyleCoord(nsStyleUnit aUnit = eStyleUnit_Null);
enum CoordConstructorType { CoordConstructor };
inline nsStyleCoord(nscoord aValue, CoordConstructorType);
nsStyleCoord(int32_t aValue, nsStyleUnit aUnit);
nsStyleCoord(float aValue, nsStyleUnit aUnit);
inline nsStyleCoord(const nsStyleCoord& aCopy);
inline nsStyleCoord(const nsStyleUnion& aValue, nsStyleUnit aUnit);
~nsStyleCoord() { Reset(); }
nsStyleCoord& operator=(const nsStyleCoord& aOther) {
if (this != &aOther) {
SetValue(mUnit, mValue, aOther);
}
return *this;
}
bool operator==(const nsStyleCoord& aOther) const;
bool operator!=(const nsStyleCoord& aOther) const;
nsStyleUnit GetUnit() const {
NS_ASSERTION(mUnit != eStyleUnit_Null, "reading uninitialized value");
return mUnit;
}
// This is especially useful to check if it is the property's initial value
// or keyword for sizing properties.
bool IsAutoOrEnum() const {
// The initial value of width/height and min-width/min-height is `auto`.
// The initial value of max-width/max-height is `none`.
return mUnit == eStyleUnit_Auto || mUnit == eStyleUnit_None ||
mUnit == eStyleUnit_Enumerated;
}
bool IsAngleValue() const { return eStyleUnit_Degree == mUnit; }
static bool IsCalcUnit(nsStyleUnit aUnit) { return aUnit == eStyleUnit_Calc; }
static bool IsPointerUnit(nsStyleUnit aUnit) { return IsCalcUnit(aUnit); }
bool IsCalcUnit() const { return IsCalcUnit(mUnit); }
bool IsPointerValue() const { return IsPointerUnit(mUnit); }
bool IsCoordPercentCalcUnit() const {
return mUnit == eStyleUnit_Coord || mUnit == eStyleUnit_Percent ||
IsCalcUnit();
}
// Does this calc() expression have any percentages inside it? Can be
// called only when IsCalcUnit() is true.
bool CalcHasPercent() const { return GetCalcValue()->mHasPercent; }
bool HasPercent() const {
return mUnit == eStyleUnit_Percent || (IsCalcUnit() && CalcHasPercent());
}
static bool ConvertsToPercent(const nsStyleUnit aUnit,
const nsStyleUnion aValue) {
if (aUnit == eStyleUnit_Percent) {
return true;
}
if (!IsCalcUnit(aUnit)) {
return false;
}
auto* calc = AsCalcValue(aValue);
return calc->mLength == 0 && calc->mHasPercent;
}
bool ConvertsToPercent() const { return ConvertsToPercent(mUnit, mValue); }
float ToPercent() const {
MOZ_ASSERT(ConvertsToPercent());
if (IsCalcUnit()) {
MOZ_ASSERT(CalcHasPercent() && GetCalcValue()->mLength == 0);
return GetCalcValue()->mPercent;
}
return mValue.mFloat;
}
static bool ConvertsToLength(const nsStyleUnit aUnit,
const nsStyleUnion aValue) {
return aUnit == eStyleUnit_Coord ||
(IsCalcUnit(aUnit) && !AsCalcValue(aValue)->mHasPercent);
}
bool ConvertsToLength() const { return ConvertsToLength(mUnit, mValue); }
static nscoord ToLength(nsStyleUnit aUnit, nsStyleUnion aValue) {
MOZ_ASSERT(ConvertsToLength(aUnit, aValue));
if (IsCalcUnit(aUnit)) {
// Note: ToLength asserts !mHasPercent
return AsCalcValue(aValue)->ToLength();
}
MOZ_ASSERT(aUnit == eStyleUnit_Coord);
return aValue.mInt;
}
nscoord ToLength() const { return ToLength(GetUnit(), mValue); }
// Callers must verify IsCalcUnit before calling this function.
static Calc* AsCalcValue(nsStyleUnion aValue) {
return static_cast<Calc*>(aValue.mPointer);
}
// Compute the value that IsCalcUnit().
// @note the caller is expected to handle percentage of an indefinite size
// and NOT call this method with aPercentageBasis == NS_UNCONSTRAINEDSIZE.
// @note the return value may be negative, e.g. for "calc(a - b%)"
nscoord ComputeComputedCalc(nscoord aPercentageBasis) const;
// Compute the value that is either a coord, a percent, or a calc expression.
// @note the caller is expected to handle percentage of an indefinite size
// and NOT call this method with aPercentageBasis == NS_UNCONSTRAINEDSIZE.
// @note the return value may be negative, e.g. for "calc(a - b%)"
nscoord ComputeCoordPercentCalc(nscoord aPercentageBasis) const;
nscoord GetCoordValue() const;
int32_t GetIntValue() const;
float GetPercentValue() const;
float GetFactorValue() const;
float GetFactorOrPercentValue() const;
float GetAngleValue() const;
double GetAngleValueInDegrees() const;
double GetAngleValueInRadians() const;
float GetFlexFractionValue() const;
Calc* GetCalcValue() const;
template <typename T,
typename = typename std::enable_if<std::is_enum<T>::value>::type>
T GetEnumValue() const {
MOZ_ASSERT(GetUnit() == eStyleUnit_Enumerated,
"The unit must be eStyleUnit_Enumerated!");
return static_cast<T>(GetIntValue());
}
// Sets to null and releases any refcounted objects. Only use this if the
// object is initialized (i.e. don't use it in nsStyleCoord constructors).
void Reset();
void SetCoordValue(nscoord aValue);
void SetIntValue(int32_t aValue, nsStyleUnit aUnit);
void SetPercentValue(float aValue);
void SetFactorValue(float aValue);
void SetFlexFractionValue(float aValue);
void SetNormalValue();
void SetAutoValue();
void SetNoneValue();
void SetCalcValue(Calc* aValue);
template <typename T,
typename = typename std::enable_if<std::is_enum<T>::value>::type>
void SetEnumValue(T aValue) {
static_assert(mozilla::EnumTypeFitsWithin<T, int32_t>::value,
"aValue must be an enum that fits within mValue.mInt!");
SetIntValue(static_cast<int32_t>(aValue), eStyleUnit_Enumerated);
}
// Resets a coord represented by a unit/value pair.
static inline void Reset(nsStyleUnit& aUnit, nsStyleUnion& aValue);
// Sets a coord represented by a unit/value pair from a second
// unit/value pair.
static inline void SetValue(nsStyleUnit& aUnit, nsStyleUnion& aValue,
nsStyleUnit aOtherUnit,
const nsStyleUnion& aOtherValue);
// Sets a coord represented by a unit/value pair from an nsStyleCoord.
static inline void SetValue(nsStyleUnit& aUnit, nsStyleUnion& aValue,
const nsStyleCoord& aOther);
// Like the above, but do not reset before setting.
static inline void InitWithValue(nsStyleUnit& aUnit, nsStyleUnion& aValue,
nsStyleUnit aOtherUnit,
const nsStyleUnion& aOtherValue);
static inline void InitWithValue(nsStyleUnit& aUnit, nsStyleUnion& aValue,
const nsStyleCoord& aOther);
private:
nsStyleUnit mUnit;
nsStyleUnion mValue;
};
/**
* Class that represents a set of top/right/bottom/left nsStyleCoords.
* This is commonly used to hold the widths of the borders, margins,
* or paddings of a box.
*/
/** <div rustbindgen private accessor="unsafe"></div> */
class nsStyleSides {
public:
nsStyleSides();
nsStyleSides(const nsStyleSides&);
~nsStyleSides();
nsStyleSides& operator=(const nsStyleSides& aCopy);
bool operator==(const nsStyleSides& aOther) const;
bool operator!=(const nsStyleSides& aOther) const;
inline nsStyleUnit GetUnit(mozilla::Side aSide) const;
inline nsStyleUnit GetLeftUnit() const;
inline nsStyleUnit GetTopUnit() const;
inline nsStyleUnit GetRightUnit() const;
inline nsStyleUnit GetBottomUnit() const;
inline nsStyleCoord Get(mozilla::Side aSide) const;
inline nsStyleCoord GetLeft() const;
inline nsStyleCoord GetTop() const;
inline nsStyleCoord GetRight() const;
inline nsStyleCoord GetBottom() const;
// Methods to access the units and values in terms of logical sides
// for a given writing mode.
// NOTE: The definitions are in WritingModes.h (after we have the full
// declaration of WritingMode available).
inline nsStyleUnit GetUnit(mozilla::WritingMode aWritingMode,
mozilla::LogicalSide aSide) const;
inline nsStyleUnit GetIStartUnit(mozilla::WritingMode aWritingMode) const;
inline nsStyleUnit GetBStartUnit(mozilla::WritingMode aWritingMode) const;
inline nsStyleUnit GetIEndUnit(mozilla::WritingMode aWritingMode) const;
inline nsStyleUnit GetBEndUnit(mozilla::WritingMode aWritingMode) const;
// Return true if either the start or end side in the axis is 'auto'.
inline bool HasBlockAxisAuto(mozilla::WritingMode aWritingMode) const;
inline bool HasInlineAxisAuto(mozilla::WritingMode aWritingMode) const;
inline nsStyleCoord Get(mozilla::WritingMode aWritingMode,
mozilla::LogicalSide aSide) const;
inline nsStyleCoord GetIStart(mozilla::WritingMode aWritingMode) const;
inline nsStyleCoord GetBStart(mozilla::WritingMode aWritingMode) const;
inline nsStyleCoord GetIEnd(mozilla::WritingMode aWritingMode) const;
inline nsStyleCoord GetBEnd(mozilla::WritingMode aWritingMode) const;
// Sets each side to null and releases any refcounted objects. Only use this
// if the object is initialized (i.e. don't use it in nsStyleSides
// constructors).
void Reset();
inline void Set(mozilla::Side aSide, const nsStyleCoord& aCoord);
inline void SetLeft(const nsStyleCoord& aCoord);
inline void SetTop(const nsStyleCoord& aCoord);
inline void SetRight(const nsStyleCoord& aCoord);
inline void SetBottom(const nsStyleCoord& aCoord);
nscoord ToLength(mozilla::Side aSide) const {
return nsStyleCoord::ToLength(mUnits[aSide], mValues[aSide]);
}
bool ConvertsToLength() const {
NS_FOR_CSS_SIDES(side) {
if (!nsStyleCoord::ConvertsToLength(mUnits[side], mValues[side])) {
return false;
}
}
return true;
}
protected:
nsStyleUnit mUnits[4];
nsStyleUnion mValues[4];
};
// -------------------------
// nsStyleCoord inlines
//
inline nsStyleCoord::nsStyleCoord(nscoord aValue, CoordConstructorType)
: mUnit(eStyleUnit_Coord) {
mValue.mInt = aValue;
}
inline nsStyleCoord::nsStyleCoord(const nsStyleCoord& aCopy)
: mUnit(eStyleUnit_Null) {
InitWithValue(mUnit, mValue, aCopy);
}
inline nsStyleCoord::nsStyleCoord(const nsStyleUnion& aValue, nsStyleUnit aUnit)
: mUnit(eStyleUnit_Null) {
InitWithValue(mUnit, mValue, aUnit, aValue);
}
inline bool nsStyleCoord::operator!=(const nsStyleCoord& aOther) const {
return !((*this) == aOther);
}
inline nscoord nsStyleCoord::GetCoordValue() const {
NS_ASSERTION((mUnit == eStyleUnit_Coord), "not a coord value");
if (mUnit == eStyleUnit_Coord) {
return mValue.mInt;
}
return 0;
}
inline int32_t nsStyleCoord::GetIntValue() const {
NS_ASSERTION(
(mUnit == eStyleUnit_Enumerated) || (mUnit == eStyleUnit_Integer),
"not an int value");
if ((mUnit == eStyleUnit_Enumerated) || (mUnit == eStyleUnit_Integer)) {
return mValue.mInt;
}
return 0;
}
inline float nsStyleCoord::GetPercentValue() const {
NS_ASSERTION(mUnit == eStyleUnit_Percent, "not a percent value");
if (mUnit == eStyleUnit_Percent) {
return mValue.mFloat;
}
return 0.0f;
}
inline float nsStyleCoord::GetFactorValue() const {
NS_ASSERTION(mUnit == eStyleUnit_Factor, "not a factor value");
if (mUnit == eStyleUnit_Factor) {
return mValue.mFloat;
}
return 0.0f;
}
inline float nsStyleCoord::GetFactorOrPercentValue() const {
NS_ASSERTION(mUnit == eStyleUnit_Factor || mUnit == eStyleUnit_Percent,
"not a percent or factor value");
if (mUnit == eStyleUnit_Factor || mUnit == eStyleUnit_Percent) {
return mValue.mFloat;
}
return 0.0f;
}
inline float nsStyleCoord::GetAngleValue() const {
MOZ_ASSERT(mUnit == eStyleUnit_Degree);
return mValue.mFloat;
}
inline float nsStyleCoord::GetFlexFractionValue() const {
NS_ASSERTION(mUnit == eStyleUnit_FlexFraction, "not a fr value");
if (mUnit == eStyleUnit_FlexFraction) {
return mValue.mFloat;
}
return 0.0f;
}
inline nsStyleCoord::Calc* nsStyleCoord::GetCalcValue() const {
NS_ASSERTION(IsCalcUnit(), "not a pointer value");
if (IsCalcUnit()) {
return AsCalcValue(mValue);
}
return nullptr;
}
/* static */ inline void nsStyleCoord::Reset(nsStyleUnit& aUnit,
nsStyleUnion& aValue) {
MOZ_ASSERT(aUnit <= eStyleUnit_MAX,
"calling Reset on uninitialized nsStyleCoord?");
switch (aUnit) {
case eStyleUnit_Calc:
static_cast<Calc*>(aValue.mPointer)->Release();
break;
default:
MOZ_ASSERT(!IsPointerUnit(aUnit), "check pointer refcounting logic");
}
aUnit = eStyleUnit_Null;
aValue.mInt = 0;
}
/* static */ inline void nsStyleCoord::SetValue(
nsStyleUnit& aUnit, nsStyleUnion& aValue, nsStyleUnit aOtherUnit,
const nsStyleUnion& aOtherValue) {
Reset(aUnit, aValue);
InitWithValue(aUnit, aValue, aOtherUnit, aOtherValue);
}
/* static */ inline void nsStyleCoord::InitWithValue(
nsStyleUnit& aUnit, nsStyleUnion& aValue, nsStyleUnit aOtherUnit,
const nsStyleUnion& aOtherValue) {
aUnit = aOtherUnit;
aValue = aOtherValue;
switch (aUnit) {
case eStyleUnit_Calc:
static_cast<Calc*>(aValue.mPointer)->AddRef();
break;
default:
MOZ_ASSERT(!IsPointerUnit(aUnit), "check pointer refcounting logic");
}
}
/* static */ inline void nsStyleCoord::SetValue(nsStyleUnit& aUnit,
nsStyleUnion& aValue,
const nsStyleCoord& aOther) {
SetValue(aUnit, aValue, aOther.mUnit, aOther.mValue);
}
/* static */ inline void nsStyleCoord::InitWithValue(
nsStyleUnit& aUnit, nsStyleUnion& aValue, const nsStyleCoord& aOther) {
InitWithValue(aUnit, aValue, aOther.mUnit, aOther.mValue);
}
// -------------------------
// nsStyleSides inlines
//
inline bool nsStyleSides::operator!=(const nsStyleSides& aOther) const {
return !((*this) == aOther);
}
inline nsStyleUnit nsStyleSides::GetUnit(mozilla::Side aSide) const {
return (nsStyleUnit)mUnits[aSide];
}
inline nsStyleUnit nsStyleSides::GetLeftUnit() const {
return GetUnit(mozilla::eSideLeft);
}
inline nsStyleUnit nsStyleSides::GetTopUnit() const {
return GetUnit(mozilla::eSideTop);
}
inline nsStyleUnit nsStyleSides::GetRightUnit() const {
return GetUnit(mozilla::eSideRight);
}
inline nsStyleUnit nsStyleSides::GetBottomUnit() const {
return GetUnit(mozilla::eSideBottom);
}
inline nsStyleCoord nsStyleSides::Get(mozilla::Side aSide) const {
return nsStyleCoord(mValues[aSide], nsStyleUnit(mUnits[aSide]));
}
inline nsStyleCoord nsStyleSides::GetLeft() const {
return Get(mozilla::eSideLeft);
}
inline nsStyleCoord nsStyleSides::GetTop() const {
return Get(mozilla::eSideTop);
}
inline nsStyleCoord nsStyleSides::GetRight() const {
return Get(mozilla::eSideRight);
}
inline nsStyleCoord nsStyleSides::GetBottom() const {
return Get(mozilla::eSideBottom);
}
inline void nsStyleSides::Set(mozilla::Side aSide, const nsStyleCoord& aCoord) {
nsStyleCoord::SetValue(mUnits[aSide], mValues[aSide], aCoord);
}
inline void nsStyleSides::SetLeft(const nsStyleCoord& aCoord) {
Set(mozilla::eSideLeft, aCoord);
}
inline void nsStyleSides::SetTop(const nsStyleCoord& aCoord) {
Set(mozilla::eSideTop, aCoord);
}
inline void nsStyleSides::SetRight(const nsStyleCoord& aCoord) {
Set(mozilla::eSideRight, aCoord);
}
inline void nsStyleSides::SetBottom(const nsStyleCoord& aCoord) {
Set(mozilla::eSideBottom, aCoord);
}
#endif /* nsStyleCoord_h___ */
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