Source/WebCore/svg/SVGLengthValue.cpp - WebKit - Git at Google

 /*
  * Copyright (C) 2004, 2005, 2006 Nikolas Zimmermann <zimmermann@kde.org>
  * Copyright (C) 2004, 2005, 2006, 2007 Rob Buis <buis@kde.org>
  * Copyright (C) 2007 Apple Inc. All rights reserved.
  *
  * 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.
  */

 #include "config.h"
 #include "SVGLengthValue.h"

 #include "CSSHelper.h"
 #include "CSSPrimitiveValue.h"
 #include "FloatConversion.h"
 #include "SVGNames.h"
 #include "SVGParserUtilities.h"
 #include <wtf/MathExtras.h>
 #include <wtf/NeverDestroyed.h>
 #include <wtf/text/StringConcatenateNumbers.h>
 #include <wtf/text/TextStream.h>

 namespace WebCore {

 // Helper functions
 static inline unsigned storeUnit(SVGLengthMode mode, SVGLengthType type)
 {
     return (mode << 4) | type;
 }

 static inline SVGLengthMode extractMode(unsigned unit)
 {
     unsigned mode = unit >> 4;
     return static_cast<SVGLengthMode>(mode);
 }

 static inline SVGLengthType extractType(unsigned unit)
 {
     return static_cast<SVGLengthType>(unit & ((1 << 4) - 1));
 }

 static inline const char* lengthTypeToString(SVGLengthType type)
 {
     switch (type) {
     case LengthTypeUnknown:
     case LengthTypeNumber:
         return "";
     case LengthTypePercentage:
         return "%";
     case LengthTypeEMS:
         return "em";
     case LengthTypeEXS:
         return "ex";
     case LengthTypePX:
         return "px";
     case LengthTypeCM:
         return "cm";
     case LengthTypeMM:
         return "mm";
     case LengthTypeIN:
         return "in";
     case LengthTypePT:
         return "pt";
     case LengthTypePC:
         return "pc";
     }

     ASSERT_NOT_REACHED();
     return "";
 }

 inline SVGLengthType parseLengthType(const UChar* ptr, const UChar* end)
 {
     if (ptr == end)
         return LengthTypeNumber;

     const UChar firstChar = *ptr;

     if (++ptr == end)
         return firstChar == '%' ? LengthTypePercentage : LengthTypeUnknown;

     const UChar secondChar = *ptr;

     if (++ptr != end)
         return LengthTypeUnknown;

     if (firstChar == 'e' && secondChar == 'm')
         return LengthTypeEMS;
     if (firstChar == 'e' && secondChar == 'x')
         return LengthTypeEXS;
     if (firstChar == 'p' && secondChar == 'x')
         return LengthTypePX;
     if (firstChar == 'c' && secondChar == 'm')
         return LengthTypeCM;
     if (firstChar == 'm' && secondChar == 'm')
         return LengthTypeMM;
     if (firstChar == 'i' && secondChar == 'n')
         return LengthTypeIN;
     if (firstChar == 'p' && secondChar == 't')
         return LengthTypePT;
     if (firstChar == 'p' && secondChar == 'c')
         return LengthTypePC;

     return LengthTypeUnknown;
 }

 SVGLengthValue::SVGLengthValue(SVGLengthMode mode, const String& valueAsString)
     : m_unit(storeUnit(mode, LengthTypeNumber))
 {
     setValueAsString(valueAsString);
 }

 SVGLengthValue::SVGLengthValue(const SVGLengthContext& context, float value, SVGLengthMode mode, SVGLengthType unitType)
     : m_unit(storeUnit(mode, unitType))
 {
     setValue(value, context);
 }

 ExceptionOr<void> SVGLengthValue::setValueAsString(const String& valueAsString, SVGLengthMode mode)
 {
     m_valueInSpecifiedUnits = 0;
     m_unit = storeUnit(mode, LengthTypeNumber);
     return setValueAsString(valueAsString);
 }

 bool SVGLengthValue::operator==(const SVGLengthValue& other) const
 {
     return m_unit == other.m_unit && m_valueInSpecifiedUnits == other.m_valueInSpecifiedUnits;
 }

 bool SVGLengthValue::operator!=(const SVGLengthValue& other) const
 {
     return !operator==(other);
 }

 SVGLengthValue SVGLengthValue::construct(SVGLengthMode mode, const String& valueAsString, SVGParsingError& parseError, SVGLengthNegativeValuesMode negativeValuesMode)
 {
     SVGLengthValue length(mode);

     if (length.setValueAsString(valueAsString).hasException())
         parseError = ParsingAttributeFailedError;
     else if (negativeValuesMode == ForbidNegativeLengths && length.valueInSpecifiedUnits() < 0)
         parseError = NegativeValueForbiddenError;

     return length;
 }

 SVGLengthType SVGLengthValue::unitType() const
 {
     return extractType(m_unit);
 }

 SVGLengthMode SVGLengthValue::unitMode() const
 {
     return extractMode(m_unit);
 }

 float SVGLengthValue::value(const SVGLengthContext& context) const
 {
     auto result = valueForBindings(context);
     if (result.hasException())
         return 0;
     return result.releaseReturnValue();
 }

 ExceptionOr<float> SVGLengthValue::valueForBindings(const SVGLengthContext& context) const
 {
     return context.convertValueToUserUnits(m_valueInSpecifiedUnits, extractMode(m_unit), extractType(m_unit));
 }

 ExceptionOr<void> SVGLengthValue::setValue(const SVGLengthContext& context, float value, SVGLengthMode mode, SVGLengthType unitType)
 {
     // FIXME: Seems like a bug that we change the value of m_unit even if setValue throws an exception.
     m_unit = storeUnit(mode, unitType);
     return setValue(value, context);
 }

 ExceptionOr<void> SVGLengthValue::setValue(float value, const SVGLengthContext& context)
 {
     // 100% = 100.0 instead of 1.0 for historical reasons, this could eventually be changed
     if (extractType(m_unit) == LengthTypePercentage)
         value = value / 100;

     auto convertedValue = context.convertValueFromUserUnits(value, extractMode(m_unit), extractType(m_unit));
     if (convertedValue.hasException())
         return convertedValue.releaseException();
     m_valueInSpecifiedUnits = convertedValue.releaseReturnValue();
     return { };
 }
 float SVGLengthValue::valueAsPercentage() const
 {
     // 100% = 100.0 instead of 1.0 for historical reasons, this could eventually be changed
     if (extractType(m_unit) == LengthTypePercentage)
         return m_valueInSpecifiedUnits / 100;

     return m_valueInSpecifiedUnits;
 }

 ExceptionOr<void> SVGLengthValue::setValueAsString(const String& string)
 {
     if (string.isEmpty())
         return { };

     float convertedNumber = 0;
     auto upconvertedCharacters = StringView(string).upconvertedCharacters();
     const UChar* ptr = upconvertedCharacters;
     const UChar* end = ptr + string.length();

     if (!parseNumber(ptr, end, convertedNumber, false))
         return Exception { SyntaxError };

     auto type = parseLengthType(ptr, end);
     if (type == LengthTypeUnknown)
         return Exception { SyntaxError };

     m_unit = storeUnit(extractMode(m_unit), type);
     m_valueInSpecifiedUnits = convertedNumber;
     return { };
 }

 String SVGLengthValue::valueAsString() const
 {
     return makeString(FormattedNumber::fixedPrecision(m_valueInSpecifiedUnits), lengthTypeToString(extractType(m_unit)));
 }

 ExceptionOr<void> SVGLengthValue::newValueSpecifiedUnits(unsigned short type, float value)
 {
     if (type == LengthTypeUnknown || type > LengthTypePC)
         return Exception { NotSupportedError };

     m_unit = storeUnit(extractMode(m_unit), static_cast<SVGLengthType>(type));
     m_valueInSpecifiedUnits = value;
     return { };
 }

 ExceptionOr<void> SVGLengthValue::convertToSpecifiedUnits(unsigned short type, const SVGLengthContext& context)
 {
     if (type == LengthTypeUnknown || type > LengthTypePC)
         return Exception { NotSupportedError };

     auto valueInUserUnits = valueForBindings(context);
     if (valueInUserUnits.hasException())
         return valueInUserUnits.releaseException();

     auto originalUnitAndType = m_unit;
     m_unit = storeUnit(extractMode(m_unit), static_cast<SVGLengthType>(type));
     auto result = setValue(valueInUserUnits.releaseReturnValue(), context);
     if (result.hasException()) {
         m_unit = originalUnitAndType;
         return result.releaseException();
     }

     return { };
 }

 SVGLengthValue SVGLengthValue::fromCSSPrimitiveValue(const CSSPrimitiveValue& value)
 {
     SVGLengthType type;
     switch (value.primitiveType()) {
     case CSSPrimitiveValue::CSS_NUMBER:
         type = LengthTypeNumber;
         break;
     case CSSPrimitiveValue::CSS_PERCENTAGE:
         type = LengthTypePercentage;
         break;
     case CSSPrimitiveValue::CSS_EMS:
         type = LengthTypeEMS;
         break;
     case CSSPrimitiveValue::CSS_EXS:
         type = LengthTypeEXS;
         break;
     case CSSPrimitiveValue::CSS_PX:
         type = LengthTypePX;
         break;
     case CSSPrimitiveValue::CSS_CM:
         type = LengthTypeCM;
         break;
     case CSSPrimitiveValue::CSS_MM:
         type = LengthTypeMM;
         break;
     case CSSPrimitiveValue::CSS_IN:
         type = LengthTypeIN;
         break;
     case CSSPrimitiveValue::CSS_PT:
         type = LengthTypePT;
         break;
     case CSSPrimitiveValue::CSS_PC:
         type = LengthTypePC;
         break;
     case CSSPrimitiveValue::CSS_UNKNOWN:
     default:
         return { };
     };

     SVGLengthValue length;
     length.newValueSpecifiedUnits(type, value.floatValue());
     return length;
 }

 Ref<CSSPrimitiveValue> SVGLengthValue::toCSSPrimitiveValue(const SVGLengthValue& length)
 {
     CSSPrimitiveValue::UnitType cssType = CSSPrimitiveValue::CSS_UNKNOWN;
     switch (length.unitType()) {
     case LengthTypeUnknown:
         break;
     case LengthTypeNumber:
         cssType = CSSPrimitiveValue::CSS_NUMBER;
         break;
     case LengthTypePercentage:
         cssType = CSSPrimitiveValue::CSS_PERCENTAGE;
         break;
     case LengthTypeEMS:
         cssType = CSSPrimitiveValue::CSS_EMS;
         break;
     case LengthTypeEXS:
         cssType = CSSPrimitiveValue::CSS_EXS;
         break;
     case LengthTypePX:
         cssType = CSSPrimitiveValue::CSS_PX;
         break;
     case LengthTypeCM:
         cssType = CSSPrimitiveValue::CSS_CM;
         break;
     case LengthTypeMM:
         cssType = CSSPrimitiveValue::CSS_MM;
         break;
     case LengthTypeIN:
         cssType = CSSPrimitiveValue::CSS_IN;
         break;
     case LengthTypePT:
         cssType = CSSPrimitiveValue::CSS_PT;
         break;
     case LengthTypePC:
         cssType = CSSPrimitiveValue::CSS_PC;
         break;
     };

     return CSSPrimitiveValue::create(length.valueInSpecifiedUnits(), cssType);
 }

 SVGLengthMode SVGLengthValue::lengthModeForAnimatedLengthAttribute(const QualifiedName& attrName)
 {
     using Map = HashMap<QualifiedName, SVGLengthMode>;
     static NeverDestroyed<Map> map = [] {
         struct Mode {
             const QualifiedName& name;
             SVGLengthMode mode;
         };
         static const Mode modes[] = {
             { SVGNames::xAttr, LengthModeWidth },
             { SVGNames::yAttr, LengthModeHeight },
             { SVGNames::cxAttr, LengthModeWidth },
             { SVGNames::cyAttr, LengthModeHeight },
             { SVGNames::dxAttr, LengthModeWidth },
             { SVGNames::dyAttr, LengthModeHeight },
             { SVGNames::fxAttr, LengthModeWidth },
             { SVGNames::fyAttr, LengthModeHeight },
             { SVGNames::widthAttr, LengthModeWidth },
             { SVGNames::heightAttr, LengthModeHeight },
             { SVGNames::x1Attr, LengthModeWidth },
             { SVGNames::x2Attr, LengthModeWidth },
             { SVGNames::y1Attr, LengthModeHeight },
             { SVGNames::y2Attr, LengthModeHeight },
             { SVGNames::refXAttr, LengthModeWidth },
             { SVGNames::refYAttr, LengthModeHeight },
             { SVGNames::markerWidthAttr, LengthModeWidth },
             { SVGNames::markerHeightAttr, LengthModeHeight },
             { SVGNames::textLengthAttr, LengthModeWidth },
             { SVGNames::startOffsetAttr, LengthModeWidth },
         };
         Map map;
         for (auto& mode : modes)
             map.add(mode.name, mode.mode);
         return map;
     }();

     auto result = map.get().find(attrName);
     if (result == map.get().end())
         return LengthModeOther;
     return result->value;
 }

 TextStream& operator<<(TextStream& ts, const SVGLengthValue& length)
 {
     ts << length.valueAsString();
     return ts;
 }

 }
	/*
	* Copyright (C) 2004, 2005, 2006 Nikolas Zimmermann <zimmermann@kde.org>
	* Copyright (C) 2004, 2005, 2006, 2007 Rob Buis <buis@kde.org>
	* Copyright (C) 2007 Apple Inc. All rights reserved.
	*
	* 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.
	*/

	#include "config.h"
	#include "SVGLengthValue.h"

	#include "CSSHelper.h"
	#include "CSSPrimitiveValue.h"
	#include "FloatConversion.h"
	#include "SVGNames.h"
	#include "SVGParserUtilities.h"
	#include <wtf/MathExtras.h>
	#include <wtf/NeverDestroyed.h>
	#include <wtf/text/StringConcatenateNumbers.h>
	#include <wtf/text/TextStream.h>

	namespace WebCore {

	// Helper functions
	static inline unsigned storeUnit(SVGLengthMode mode, SVGLengthType type)
	{
	return (mode << 4) \| type;
	}

	static inline SVGLengthMode extractMode(unsigned unit)
	{
	unsigned mode = unit >> 4;
	return static_cast<SVGLengthMode>(mode);
	}

	static inline SVGLengthType extractType(unsigned unit)
	{
	return static_cast<SVGLengthType>(unit & ((1 << 4) - 1));
	}

	static inline const char* lengthTypeToString(SVGLengthType type)
	{
	switch (type) {
	case LengthTypeUnknown:
	case LengthTypeNumber:
	return "";
	case LengthTypePercentage:
	return "%";
	case LengthTypeEMS:
	return "em";
	case LengthTypeEXS:
	return "ex";
	case LengthTypePX:
	return "px";
	case LengthTypeCM:
	return "cm";
	case LengthTypeMM:
	return "mm";
	case LengthTypeIN:
	return "in";
	case LengthTypePT:
	return "pt";
	case LengthTypePC:
	return "pc";
	}

	ASSERT_NOT_REACHED();
	return "";
	}

	inline SVGLengthType parseLengthType(const UChar* ptr, const UChar* end)
	{
	if (ptr == end)
	return LengthTypeNumber;

	const UChar firstChar = *ptr;

	if (++ptr == end)
	return firstChar == '%' ? LengthTypePercentage : LengthTypeUnknown;

	const UChar secondChar = *ptr;

	if (++ptr != end)
	return LengthTypeUnknown;

	if (firstChar == 'e' && secondChar == 'm')
	return LengthTypeEMS;
	if (firstChar == 'e' && secondChar == 'x')
	return LengthTypeEXS;
	if (firstChar == 'p' && secondChar == 'x')
	return LengthTypePX;
	if (firstChar == 'c' && secondChar == 'm')
	return LengthTypeCM;
	if (firstChar == 'm' && secondChar == 'm')
	return LengthTypeMM;
	if (firstChar == 'i' && secondChar == 'n')
	return LengthTypeIN;
	if (firstChar == 'p' && secondChar == 't')
	return LengthTypePT;
	if (firstChar == 'p' && secondChar == 'c')
	return LengthTypePC;

	return LengthTypeUnknown;
	}

	SVGLengthValue::SVGLengthValue(SVGLengthMode mode, const String& valueAsString)
	: m_unit(storeUnit(mode, LengthTypeNumber))
	{
	setValueAsString(valueAsString);
	}

	SVGLengthValue::SVGLengthValue(const SVGLengthContext& context, float value, SVGLengthMode mode, SVGLengthType unitType)
	: m_unit(storeUnit(mode, unitType))
	{
	setValue(value, context);
	}

	ExceptionOr<void> SVGLengthValue::setValueAsString(const String& valueAsString, SVGLengthMode mode)
	{
	m_valueInSpecifiedUnits = 0;
	m_unit = storeUnit(mode, LengthTypeNumber);
	return setValueAsString(valueAsString);
	}

	bool SVGLengthValue::operator==(const SVGLengthValue& other) const
	{
	return m_unit == other.m_unit && m_valueInSpecifiedUnits == other.m_valueInSpecifiedUnits;
	}

	bool SVGLengthValue::operator!=(const SVGLengthValue& other) const
	{
	return !operator==(other);
	}

	SVGLengthValue SVGLengthValue::construct(SVGLengthMode mode, const String& valueAsString, SVGParsingError& parseError, SVGLengthNegativeValuesMode negativeValuesMode)
	{
	SVGLengthValue length(mode);

	if (length.setValueAsString(valueAsString).hasException())
	parseError = ParsingAttributeFailedError;
	else if (negativeValuesMode == ForbidNegativeLengths && length.valueInSpecifiedUnits() < 0)
	parseError = NegativeValueForbiddenError;

	return length;
	}

	SVGLengthType SVGLengthValue::unitType() const
	{
	return extractType(m_unit);
	}

	SVGLengthMode SVGLengthValue::unitMode() const
	{
	return extractMode(m_unit);
	}

	float SVGLengthValue::value(const SVGLengthContext& context) const
	{
	auto result = valueForBindings(context);
	if (result.hasException())
	return 0;
	return result.releaseReturnValue();
	}

	ExceptionOr<float> SVGLengthValue::valueForBindings(const SVGLengthContext& context) const
	{
	return context.convertValueToUserUnits(m_valueInSpecifiedUnits, extractMode(m_unit), extractType(m_unit));
	}

	ExceptionOr<void> SVGLengthValue::setValue(const SVGLengthContext& context, float value, SVGLengthMode mode, SVGLengthType unitType)
	{
	// FIXME: Seems like a bug that we change the value of m_unit even if setValue throws an exception.
	m_unit = storeUnit(mode, unitType);
	return setValue(value, context);
	}

	ExceptionOr<void> SVGLengthValue::setValue(float value, const SVGLengthContext& context)
	{
	// 100% = 100.0 instead of 1.0 for historical reasons, this could eventually be changed
	if (extractType(m_unit) == LengthTypePercentage)
	value = value / 100;

	auto convertedValue = context.convertValueFromUserUnits(value, extractMode(m_unit), extractType(m_unit));
	if (convertedValue.hasException())
	return convertedValue.releaseException();
	m_valueInSpecifiedUnits = convertedValue.releaseReturnValue();
	return { };
	}
	float SVGLengthValue::valueAsPercentage() const
	{
	// 100% = 100.0 instead of 1.0 for historical reasons, this could eventually be changed
	if (extractType(m_unit) == LengthTypePercentage)
	return m_valueInSpecifiedUnits / 100;

	return m_valueInSpecifiedUnits;
	}

	ExceptionOr<void> SVGLengthValue::setValueAsString(const String& string)
	{
	if (string.isEmpty())
	return { };

	float convertedNumber = 0;
	auto upconvertedCharacters = StringView(string).upconvertedCharacters();
	const UChar* ptr = upconvertedCharacters;
	const UChar* end = ptr + string.length();

	if (!parseNumber(ptr, end, convertedNumber, false))
	return Exception { SyntaxError };

	auto type = parseLengthType(ptr, end);
	if (type == LengthTypeUnknown)
	return Exception { SyntaxError };

	m_unit = storeUnit(extractMode(m_unit), type);
	m_valueInSpecifiedUnits = convertedNumber;
	return { };
	}

	String SVGLengthValue::valueAsString() const
	{
	return makeString(FormattedNumber::fixedPrecision(m_valueInSpecifiedUnits), lengthTypeToString(extractType(m_unit)));
	}

	ExceptionOr<void> SVGLengthValue::newValueSpecifiedUnits(unsigned short type, float value)
	{
	if (type == LengthTypeUnknown \|\| type > LengthTypePC)
	return Exception { NotSupportedError };

	m_unit = storeUnit(extractMode(m_unit), static_cast<SVGLengthType>(type));
	m_valueInSpecifiedUnits = value;
	return { };
	}

	ExceptionOr<void> SVGLengthValue::convertToSpecifiedUnits(unsigned short type, const SVGLengthContext& context)
	{
	if (type == LengthTypeUnknown \|\| type > LengthTypePC)
	return Exception { NotSupportedError };

	auto valueInUserUnits = valueForBindings(context);
	if (valueInUserUnits.hasException())
	return valueInUserUnits.releaseException();

	auto originalUnitAndType = m_unit;
	m_unit = storeUnit(extractMode(m_unit), static_cast<SVGLengthType>(type));
	auto result = setValue(valueInUserUnits.releaseReturnValue(), context);
	if (result.hasException()) {
	m_unit = originalUnitAndType;
	return result.releaseException();
	}

	return { };
	}

	SVGLengthValue SVGLengthValue::fromCSSPrimitiveValue(const CSSPrimitiveValue& value)
	{
	SVGLengthType type;
	switch (value.primitiveType()) {
	case CSSPrimitiveValue::CSS_NUMBER:
	type = LengthTypeNumber;
	break;
	case CSSPrimitiveValue::CSS_PERCENTAGE:
	type = LengthTypePercentage;
	break;
	case CSSPrimitiveValue::CSS_EMS:
	type = LengthTypeEMS;
	break;
	case CSSPrimitiveValue::CSS_EXS:
	type = LengthTypeEXS;
	break;
	case CSSPrimitiveValue::CSS_PX:
	type = LengthTypePX;
	break;
	case CSSPrimitiveValue::CSS_CM:
	type = LengthTypeCM;
	break;
	case CSSPrimitiveValue::CSS_MM:
	type = LengthTypeMM;
	break;
	case CSSPrimitiveValue::CSS_IN:
	type = LengthTypeIN;
	break;
	case CSSPrimitiveValue::CSS_PT:
	type = LengthTypePT;
	break;
	case CSSPrimitiveValue::CSS_PC:
	type = LengthTypePC;
	break;
	case CSSPrimitiveValue::CSS_UNKNOWN:
	default:
	return { };
	};

	SVGLengthValue length;
	length.newValueSpecifiedUnits(type, value.floatValue());
	return length;
	}

	Ref<CSSPrimitiveValue> SVGLengthValue::toCSSPrimitiveValue(const SVGLengthValue& length)
	{
	CSSPrimitiveValue::UnitType cssType = CSSPrimitiveValue::CSS_UNKNOWN;
	switch (length.unitType()) {
	case LengthTypeUnknown:
	break;
	case LengthTypeNumber:
	cssType = CSSPrimitiveValue::CSS_NUMBER;
	break;
	case LengthTypePercentage:
	cssType = CSSPrimitiveValue::CSS_PERCENTAGE;
	break;
	case LengthTypeEMS:
	cssType = CSSPrimitiveValue::CSS_EMS;
	break;
	case LengthTypeEXS:
	cssType = CSSPrimitiveValue::CSS_EXS;
	break;
	case LengthTypePX:
	cssType = CSSPrimitiveValue::CSS_PX;
	break;
	case LengthTypeCM:
	cssType = CSSPrimitiveValue::CSS_CM;
	break;
	case LengthTypeMM:
	cssType = CSSPrimitiveValue::CSS_MM;
	break;
	case LengthTypeIN:
	cssType = CSSPrimitiveValue::CSS_IN;
	break;
	case LengthTypePT:
	cssType = CSSPrimitiveValue::CSS_PT;
	break;
	case LengthTypePC:
	cssType = CSSPrimitiveValue::CSS_PC;
	break;
	};

	return CSSPrimitiveValue::create(length.valueInSpecifiedUnits(), cssType);
	}

	SVGLengthMode SVGLengthValue::lengthModeForAnimatedLengthAttribute(const QualifiedName& attrName)
	{
	using Map = HashMap<QualifiedName, SVGLengthMode>;
	static NeverDestroyed<Map> map = [] {
	struct Mode {
	const QualifiedName& name;
	SVGLengthMode mode;
	};
	static const Mode modes[] = {
	{ SVGNames::xAttr, LengthModeWidth },
	{ SVGNames::yAttr, LengthModeHeight },
	{ SVGNames::cxAttr, LengthModeWidth },
	{ SVGNames::cyAttr, LengthModeHeight },
	{ SVGNames::dxAttr, LengthModeWidth },
	{ SVGNames::dyAttr, LengthModeHeight },
	{ SVGNames::fxAttr, LengthModeWidth },
	{ SVGNames::fyAttr, LengthModeHeight },
	{ SVGNames::widthAttr, LengthModeWidth },
	{ SVGNames::heightAttr, LengthModeHeight },
	{ SVGNames::x1Attr, LengthModeWidth },
	{ SVGNames::x2Attr, LengthModeWidth },
	{ SVGNames::y1Attr, LengthModeHeight },
	{ SVGNames::y2Attr, LengthModeHeight },
	{ SVGNames::refXAttr, LengthModeWidth },
	{ SVGNames::refYAttr, LengthModeHeight },
	{ SVGNames::markerWidthAttr, LengthModeWidth },
	{ SVGNames::markerHeightAttr, LengthModeHeight },
	{ SVGNames::textLengthAttr, LengthModeWidth },
	{ SVGNames::startOffsetAttr, LengthModeWidth },
	};
	Map map;
	for (auto& mode : modes)
	map.add(mode.name, mode.mode);
	return map;
	}();

	auto result = map.get().find(attrName);
	if (result == map.get().end())
	return LengthModeOther;
	return result->value;
	}

	TextStream& operator<<(TextStream& ts, const SVGLengthValue& length)
	{
	ts << length.valueAsString();
	return ts;
	}

	}