343 lines
16 KiB
C++
343 lines
16 KiB
C++
/*
|
|
* (C) 1999-2003 Lars Knoll (knoll@kde.org)
|
|
* Copyright (C) 2004, 2005, 2006, 2008 Apple Inc. All rights reserved.
|
|
* Copyright (C) 2007 Alexey Proskuryakov <ap@webkit.org>
|
|
*
|
|
* This library is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU Library General Public
|
|
* License as published by the Free Software Foundation; either
|
|
* version 2 of the License, or (at your option) any later version.
|
|
*
|
|
* This library is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
* Library General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU Library General Public License
|
|
* along with this library; see the file COPYING.LIB. If not, write to
|
|
* the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
|
|
* Boston, MA 02110-1301, USA.
|
|
*/
|
|
|
|
#pragma once
|
|
|
|
#include "CSSPropertyNames.h"
|
|
#include "CSSUnits.h"
|
|
#include "CSSValue.h"
|
|
#include "CSSValueKeywords.h"
|
|
#include "Color.h"
|
|
#include "ExceptionOr.h"
|
|
#include "LayoutUnit.h"
|
|
#include <utility>
|
|
#include <wtf/Forward.h>
|
|
#include <wtf/MathExtras.h>
|
|
|
|
namespace WebCore {
|
|
|
|
class CSSBasicShape;
|
|
class CSSCalcValue;
|
|
class CSSToLengthConversionData;
|
|
class Counter;
|
|
class DeprecatedCSSOMPrimitiveValue;
|
|
class FontCascadeDescription;
|
|
class FontMetrics;
|
|
class Pair;
|
|
class Quad;
|
|
class RGBColor;
|
|
class Rect;
|
|
class RenderStyle;
|
|
class RenderView;
|
|
|
|
struct CSSFontFamily;
|
|
struct Length;
|
|
struct LengthSize;
|
|
|
|
// Max/min values for CSS, needs to slightly smaller/larger than the true max/min values to allow for rounding without overflowing.
|
|
// Subtract two (rather than one) to allow for values to be converted to float and back without exceeding the LayoutUnit::max.
|
|
const int maxValueForCssLength = intMaxForLayoutUnit - 2;
|
|
const int minValueForCssLength = intMinForLayoutUnit + 2;
|
|
|
|
// Dimension calculations are imprecise, often resulting in values of e.g.
|
|
// 44.99998. We need to round if we're really close to the next integer value.
|
|
template<typename T> inline T roundForImpreciseConversion(double value)
|
|
{
|
|
value += (value < 0) ? -0.01 : +0.01;
|
|
return ((value > std::numeric_limits<T>::max()) || (value < std::numeric_limits<T>::min())) ? 0 : static_cast<T>(value);
|
|
}
|
|
|
|
template<> inline float roundForImpreciseConversion(double value)
|
|
{
|
|
double ceiledValue = ceil(value);
|
|
double proximityToNextInt = ceiledValue - value;
|
|
if (proximityToNextInt <= 0.01 && value > 0)
|
|
return static_cast<float>(ceiledValue);
|
|
if (proximityToNextInt >= 0.99 && value < 0)
|
|
return static_cast<float>(floor(value));
|
|
return static_cast<float>(value);
|
|
}
|
|
|
|
class CSSPrimitiveValue final : public CSSValue {
|
|
public:
|
|
static constexpr bool isLength(CSSUnitType);
|
|
static double computeDegrees(CSSUnitType, double angle);
|
|
|
|
// FIXME: Some of these use primitiveUnitType() and some use primitiveType(). Many that use primitiveUnitType() are likely broken with calc().
|
|
bool isAngle() const { return unitCategory(primitiveType()) == CSSUnitCategory::Angle; }
|
|
bool isAttr() const { return primitiveUnitType() == CSSUnitType::CSS_ATTR; }
|
|
bool isCounter() const { return primitiveUnitType() == CSSUnitType::CSS_COUNTER; }
|
|
bool isFontIndependentLength() const { return primitiveUnitType() >= CSSUnitType::CSS_PX && primitiveUnitType() <= CSSUnitType::CSS_PC; }
|
|
bool isFontRelativeLength() const { return isFontRelativeLength(primitiveUnitType()); }
|
|
bool isQuirkyEms() const { return primitiveType() == CSSUnitType::CSS_QUIRKY_EMS; }
|
|
bool isLength() const { return isLength(static_cast<CSSUnitType>(primitiveType())); }
|
|
bool isNumber() const { return primitiveType() == CSSUnitType::CSS_NUMBER; }
|
|
bool isPercentage() const { return primitiveType() == CSSUnitType::CSS_PERCENTAGE; }
|
|
bool isPx() const { return primitiveType() == CSSUnitType::CSS_PX; }
|
|
bool isRect() const { return primitiveUnitType() == CSSUnitType::CSS_RECT; }
|
|
bool isPair() const { return primitiveUnitType() == CSSUnitType::CSS_PAIR; }
|
|
bool isPropertyID() const { return primitiveUnitType() == CSSUnitType::CSS_PROPERTY_ID; }
|
|
bool isRGBColor() const { return primitiveUnitType() == CSSUnitType::CSS_RGBCOLOR; }
|
|
bool isShape() const { return primitiveUnitType() == CSSUnitType::CSS_SHAPE; }
|
|
bool isString() const { return primitiveUnitType() == CSSUnitType::CSS_STRING; }
|
|
bool isFontFamily() const { return primitiveUnitType() == CSSUnitType::CSS_FONT_FAMILY; }
|
|
bool isTime() const { return unitCategory(primitiveUnitType()) == CSSUnitCategory::Time; }
|
|
bool isFrequency() const { return unitCategory(primitiveType()) == CSSUnitCategory::Frequency; }
|
|
bool isURI() const { return primitiveUnitType() == CSSUnitType::CSS_URI; }
|
|
bool isCalculated() const { return primitiveUnitType() == CSSUnitType::CSS_CALC; }
|
|
bool isCalculatedPercentageWithNumber() const { return primitiveType() == CSSUnitType::CSS_CALC_PERCENTAGE_WITH_NUMBER; }
|
|
bool isCalculatedPercentageWithLength() const { return primitiveType() == CSSUnitType::CSS_CALC_PERCENTAGE_WITH_LENGTH; }
|
|
bool isDotsPerInch() const { return primitiveType() == CSSUnitType::CSS_DPI; }
|
|
bool isDotsPerPixel() const { return primitiveType() == CSSUnitType::CSS_DPPX; }
|
|
bool isDotsPerCentimeter() const { return primitiveType() == CSSUnitType::CSS_DPCM; }
|
|
bool isResolution() const { return unitCategory(primitiveType()) == CSSUnitCategory::Resolution; }
|
|
bool isViewportPercentageLength() const { return isViewportPercentageLength(primitiveUnitType()); }
|
|
bool isViewportPercentageWidth() const { return primitiveUnitType() == CSSUnitType::CSS_VW; }
|
|
bool isViewportPercentageHeight() const { return primitiveUnitType() == CSSUnitType::CSS_VH; }
|
|
bool isViewportPercentageMax() const { return primitiveUnitType() == CSSUnitType::CSS_VMAX; }
|
|
bool isViewportPercentageMin() const { return primitiveUnitType() == CSSUnitType::CSS_VMIN; }
|
|
bool isValueID() const { return primitiveUnitType() == CSSUnitType::CSS_VALUE_ID; }
|
|
bool isFlex() const { return primitiveType() == CSSUnitType::CSS_FR; }
|
|
bool isCustomIdent() const { return primitiveUnitType() == CSSUnitType::CustomIdent; }
|
|
|
|
static Ref<CSSPrimitiveValue> createIdentifier(CSSValueID valueID) { return adoptRef(*new CSSPrimitiveValue(valueID)); }
|
|
static Ref<CSSPrimitiveValue> createIdentifier(CSSPropertyID propertyID) { return adoptRef(*new CSSPrimitiveValue(propertyID)); }
|
|
|
|
static Ref<CSSPrimitiveValue> create(double value, CSSUnitType type) { return adoptRef(*new CSSPrimitiveValue(value, type)); }
|
|
static Ref<CSSPrimitiveValue> create(const String& value, CSSUnitType type) { return adoptRef(*new CSSPrimitiveValue(value, type)); }
|
|
static Ref<CSSPrimitiveValue> create(const Length& value, const RenderStyle& style) { return adoptRef(*new CSSPrimitiveValue(value, style)); }
|
|
static Ref<CSSPrimitiveValue> create(const LengthSize& value, const RenderStyle& style) { return adoptRef(*new CSSPrimitiveValue(value, style)); }
|
|
|
|
template<typename T> static Ref<CSSPrimitiveValue> create(T&&);
|
|
|
|
~CSSPrimitiveValue();
|
|
|
|
void cleanup();
|
|
|
|
CSSUnitType primitiveType() const;
|
|
ExceptionOr<float> getFloatValue(CSSUnitType) const;
|
|
|
|
double computeDegrees() const;
|
|
|
|
enum TimeUnit { Seconds, Milliseconds };
|
|
template<typename T, TimeUnit timeUnit> T computeTime() const;
|
|
|
|
template<typename T> T computeLength(const CSSToLengthConversionData&) const;
|
|
template<int> Length convertToLength(const CSSToLengthConversionData&) const;
|
|
|
|
bool convertingToLengthRequiresNonNullStyle(int lengthConversion) const;
|
|
|
|
double doubleValue(CSSUnitType) const;
|
|
|
|
// It's usually wrong to call this; it can trigger type conversion in calc without sufficient context to resolve relative length units.
|
|
double doubleValue() const;
|
|
|
|
// These return nullopt for calc, for which range checking is not done at parse time: <https://www.w3.org/TR/css3-values/#calc-range>.
|
|
std::optional<bool> isZero() const;
|
|
std::optional<bool> isPositive() const;
|
|
std::optional<bool> isNegative() const;
|
|
bool isCenterPosition() const;
|
|
|
|
template<typename T> inline T value(CSSUnitType type) const { return clampTo<T>(doubleValue(type)); }
|
|
template<typename T> inline T value() const { return clampTo<T>(doubleValue()); }
|
|
|
|
float floatValue(CSSUnitType type) const { return value<float>(type); }
|
|
float floatValue() const { return value<float>(); }
|
|
|
|
int intValue(CSSUnitType type) const { return value<int>(type); }
|
|
int intValue() const { return value<int>(); }
|
|
|
|
WEBCORE_EXPORT String stringValue() const;
|
|
|
|
const Color& color() const { ASSERT(primitiveUnitType() == CSSUnitType::CSS_RGBCOLOR); return *m_value.color; }
|
|
Counter* counterValue() const { return primitiveUnitType() != CSSUnitType::CSS_COUNTER ? nullptr : m_value.counter; }
|
|
CSSCalcValue* cssCalcValue() const { return primitiveUnitType() != CSSUnitType::CSS_CALC ? nullptr : m_value.calc; }
|
|
const CSSFontFamily& fontFamily() const { ASSERT(primitiveUnitType() == CSSUnitType::CSS_FONT_FAMILY); return *m_value.fontFamily; }
|
|
Pair* pairValue() const { return primitiveUnitType() != CSSUnitType::CSS_PAIR ? nullptr : m_value.pair; }
|
|
CSSPropertyID propertyID() const { return primitiveUnitType() == CSSUnitType::CSS_PROPERTY_ID ? m_value.propertyID : CSSPropertyInvalid; }
|
|
Quad* quadValue() const { return primitiveUnitType() != CSSUnitType::CSS_QUAD ? nullptr : m_value.quad; }
|
|
Rect* rectValue() const { return primitiveUnitType() != CSSUnitType::CSS_RECT ? nullptr : m_value.rect; }
|
|
CSSBasicShape* shapeValue() const { return primitiveUnitType() != CSSUnitType::CSS_SHAPE ? nullptr : m_value.shape; }
|
|
CSSValueID valueID() const { return primitiveUnitType() == CSSUnitType::CSS_VALUE_ID ? m_value.valueID : CSSValueInvalid; }
|
|
|
|
template<typename T> inline operator T() const; // Defined in CSSPrimitiveValueMappings.h
|
|
|
|
String customCSSText() const;
|
|
|
|
bool equals(const CSSPrimitiveValue&) const;
|
|
|
|
static double conversionToCanonicalUnitsScaleFactor(CSSUnitType);
|
|
static String unitTypeString(CSSUnitType);
|
|
|
|
static double computeUnzoomedNonCalcLengthDouble(CSSUnitType, double value, CSSPropertyID, const FontMetrics* = nullptr, const FontCascadeDescription* = nullptr, const FontCascadeDescription* rootFontDescription = nullptr, const RenderView* = nullptr);
|
|
static double computeNonCalcLengthDouble(const CSSToLengthConversionData&, CSSUnitType, double value);
|
|
// True if computeNonCalcLengthDouble would produce identical results when resolved against both these styles.
|
|
static bool equalForLengthResolution(const RenderStyle&, const RenderStyle&);
|
|
|
|
Ref<DeprecatedCSSOMPrimitiveValue> createDeprecatedCSSOMPrimitiveWrapper(CSSStyleDeclaration&) const;
|
|
|
|
void collectDirectComputationalDependencies(HashSet<CSSPropertyID>&) const;
|
|
void collectDirectRootComputationalDependencies(HashSet<CSSPropertyID>&) const;
|
|
|
|
private:
|
|
friend class CSSValuePool;
|
|
friend LazyNeverDestroyed<CSSPrimitiveValue>;
|
|
|
|
CSSPrimitiveValue(CSSValueID);
|
|
CSSPrimitiveValue(CSSPropertyID);
|
|
CSSPrimitiveValue(const Color&);
|
|
CSSPrimitiveValue(const Length&);
|
|
CSSPrimitiveValue(const Length&, const RenderStyle&);
|
|
CSSPrimitiveValue(const LengthSize&, const RenderStyle&);
|
|
CSSPrimitiveValue(const String&, CSSUnitType);
|
|
CSSPrimitiveValue(double, CSSUnitType);
|
|
|
|
CSSPrimitiveValue(StaticCSSValueTag, CSSValueID);
|
|
CSSPrimitiveValue(StaticCSSValueTag, const Color&);
|
|
CSSPrimitiveValue(StaticCSSValueTag, double, CSSUnitType);
|
|
|
|
template<typename T> CSSPrimitiveValue(T); // Defined in CSSPrimitiveValueMappings.h
|
|
template<typename T> CSSPrimitiveValue(RefPtr<T>&&);
|
|
template<typename T> CSSPrimitiveValue(Ref<T>&&);
|
|
|
|
static void create(int); // compile-time guard
|
|
static void create(unsigned); // compile-time guard
|
|
template<typename T> operator T*(); // compile-time guard
|
|
|
|
void init(const Length&);
|
|
void init(const LengthSize&, const RenderStyle&);
|
|
void init(Ref<CSSBasicShape>&&);
|
|
void init(RefPtr<CSSCalcValue>&&);
|
|
void init(Ref<Counter>&&);
|
|
void init(Ref<Pair>&&);
|
|
void init(Ref<Quad>&&);
|
|
void init(Ref<Rect>&&);
|
|
|
|
CSSUnitType primitiveUnitType() const { return static_cast<CSSUnitType>(m_primitiveUnitType); }
|
|
void setPrimitiveUnitType(CSSUnitType type) { m_primitiveUnitType = static_cast<unsigned>(type); }
|
|
|
|
std::optional<double> doubleValueInternal(CSSUnitType targetUnitType) const;
|
|
|
|
double computeLengthDouble(const CSSToLengthConversionData&) const;
|
|
|
|
ALWAYS_INLINE String formatNumberForCustomCSSText() const;
|
|
NEVER_INLINE String formatNumberValue(StringView) const;
|
|
|
|
static constexpr bool isFontRelativeLength(CSSUnitType);
|
|
static constexpr bool isResolution(CSSUnitType);
|
|
static constexpr bool isViewportPercentageLength(CSSUnitType type) { return type >= CSSUnitType::CSS_VW && type <= CSSUnitType::CSS_VMAX; }
|
|
|
|
union {
|
|
CSSPropertyID propertyID;
|
|
CSSValueID valueID;
|
|
double num;
|
|
StringImpl* string;
|
|
Counter* counter;
|
|
Rect* rect;
|
|
Quad* quad;
|
|
const Color* color;
|
|
Pair* pair;
|
|
CSSBasicShape* shape;
|
|
CSSCalcValue* calc;
|
|
const CSSFontFamily* fontFamily;
|
|
} m_value;
|
|
};
|
|
|
|
constexpr bool CSSPrimitiveValue::isFontRelativeLength(CSSUnitType type)
|
|
{
|
|
return type == CSSUnitType::CSS_EMS
|
|
|| type == CSSUnitType::CSS_EXS
|
|
|| type == CSSUnitType::CSS_LHS
|
|
|| type == CSSUnitType::CSS_RLHS
|
|
|| type == CSSUnitType::CSS_REMS
|
|
|| type == CSSUnitType::CSS_CHS
|
|
|| type == CSSUnitType::CSS_QUIRKY_EMS;
|
|
}
|
|
|
|
constexpr bool CSSPrimitiveValue::isLength(CSSUnitType type)
|
|
{
|
|
return (type >= CSSUnitType::CSS_EMS && type <= CSSUnitType::CSS_PC)
|
|
|| type == CSSUnitType::CSS_REMS
|
|
|| type == CSSUnitType::CSS_CHS
|
|
|| type == CSSUnitType::CSS_Q
|
|
|| type == CSSUnitType::CSS_LHS
|
|
|| type == CSSUnitType::CSS_RLHS
|
|
|| isViewportPercentageLength(type)
|
|
|| type == CSSUnitType::CSS_QUIRKY_EMS;
|
|
}
|
|
|
|
constexpr bool CSSPrimitiveValue::isResolution(CSSUnitType type)
|
|
{
|
|
return type >= CSSUnitType::CSS_DPPX && type <= CSSUnitType::CSS_DPCM;
|
|
}
|
|
|
|
template<typename T> inline Ref<CSSPrimitiveValue> CSSPrimitiveValue::create(T&& value)
|
|
{
|
|
return adoptRef(*new CSSPrimitiveValue(std::forward<T>(value)));
|
|
}
|
|
|
|
template<typename T, CSSPrimitiveValue::TimeUnit timeUnit> inline T CSSPrimitiveValue::computeTime() const
|
|
{
|
|
if (timeUnit == Seconds && primitiveType() == CSSUnitType::CSS_S)
|
|
return value<T>();
|
|
if (timeUnit == Seconds && primitiveType() == CSSUnitType::CSS_MS)
|
|
return value<T>() / 1000;
|
|
if (timeUnit == Milliseconds && primitiveType() == CSSUnitType::CSS_MS)
|
|
return value<T>();
|
|
if (timeUnit == Milliseconds && primitiveType() == CSSUnitType::CSS_S)
|
|
return value<T>() * 1000;
|
|
ASSERT_NOT_REACHED();
|
|
return 0;
|
|
}
|
|
|
|
template<typename T> inline CSSPrimitiveValue::CSSPrimitiveValue(RefPtr<T>&& value)
|
|
: CSSValue(PrimitiveClass)
|
|
{
|
|
init(WTFMove(value));
|
|
}
|
|
|
|
template<typename T> inline CSSPrimitiveValue::CSSPrimitiveValue(Ref<T>&& value)
|
|
: CSSValue(PrimitiveClass)
|
|
{
|
|
init(WTFMove(value));
|
|
}
|
|
|
|
inline double CSSPrimitiveValue::computeDegrees(CSSUnitType type, double angle)
|
|
{
|
|
switch (type) {
|
|
case CSSUnitType::CSS_DEG:
|
|
return angle;
|
|
case CSSUnitType::CSS_RAD:
|
|
return rad2deg(angle);
|
|
case CSSUnitType::CSS_GRAD:
|
|
return grad2deg(angle);
|
|
case CSSUnitType::CSS_TURN:
|
|
return turn2deg(angle);
|
|
default:
|
|
ASSERT_NOT_REACHED();
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
} // namespace WebCore
|
|
|
|
SPECIALIZE_TYPE_TRAITS_CSS_VALUE(CSSPrimitiveValue, isPrimitiveValue())
|