Source/WebCore/css/DOMMatrixReadOnly.cpp - WebKit - Git at Google

 /*
  * Copyright (C) 2017-2019 Apple Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
  *    documentation and/or other materials provided with the distribution.
  *
  * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
  * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
  * THE POSSIBILITY OF SUCH DAMAGE.
  */

 #include "config.h"
 #include "DOMMatrixReadOnly.h"

 #include "CSSParser.h"
 #include "CSSToLengthConversionData.h"
 #include "DOMMatrix.h"
 #include "DOMPoint.h"
 #include "ScriptExecutionContext.h"
 #include "StyleProperties.h"
 #include "TransformFunctions.h"
 #include <JavaScriptCore/GenericTypedArrayViewInlines.h>
 #include <JavaScriptCore/HeapInlines.h>
 #include <JavaScriptCore/JSGenericTypedArrayViewInlines.h>
 #include <wtf/IsoMallocInlines.h>
 #include <wtf/text/StringBuilder.h>

 namespace WebCore {

 WTF_MAKE_ISO_ALLOCATED_IMPL(DOMMatrixReadOnly);

 // https://drafts.fxtf.org/geometry/#dom-dommatrixreadonly-dommatrixreadonly
 ExceptionOr<Ref<DOMMatrixReadOnly>> DOMMatrixReadOnly::create(ScriptExecutionContext& scriptExecutionContext, Optional<Variant<String, Vector<double>>>&& init)
 {
     if (!init)
         return adoptRef(*new DOMMatrixReadOnly);

     return WTF::switchOn(init.value(),
         [&scriptExecutionContext](const String& init) -> ExceptionOr<Ref<DOMMatrixReadOnly>> {
             if (!scriptExecutionContext.isDocument())
                 return Exception { TypeError };

             auto parseResult = parseStringIntoAbstractMatrix(init);
             if (parseResult.hasException())
                 return parseResult.releaseException();

             return adoptRef(*new DOMMatrixReadOnly(parseResult.returnValue().matrix, parseResult.returnValue().is2D ? Is2D::Yes : Is2D::No));
         },
         [](const Vector<double>& init) -> ExceptionOr<Ref<DOMMatrixReadOnly>> {
             if (init.size() == 6) {
                 return adoptRef(*new DOMMatrixReadOnly(TransformationMatrix {
                     init[0], init[1], init[2], init[3], init[4], init[5]
                 }, Is2D::Yes));
             }
             if (init.size() == 16) {
                 return adoptRef(*new DOMMatrixReadOnly(TransformationMatrix {
                     init[0], init[1], init[2], init[3],
                     init[4], init[5], init[6], init[7],
                     init[8], init[9], init[10], init[11],
                     init[12], init[13], init[14], init[15]
                 }, Is2D::No));
             }
             return Exception { TypeError };
         }
     );
 }

 DOMMatrixReadOnly::DOMMatrixReadOnly(const TransformationMatrix& matrix, Is2D is2D)
     : m_matrix(matrix)
     , m_is2D(is2D == Is2D::Yes)
 {
     ASSERT(!m_is2D || m_matrix.isAffine());
 }

 DOMMatrixReadOnly::DOMMatrixReadOnly(TransformationMatrix&& matrix, Is2D is2D)
     : m_matrix(WTFMove(matrix))
     , m_is2D(is2D == Is2D::Yes)
 {
     ASSERT(!m_is2D || m_matrix.isAffine());
 }

 inline Ref<DOMMatrix> DOMMatrixReadOnly::cloneAsDOMMatrix() const
 {
     return DOMMatrix::create(m_matrix, m_is2D ? Is2D::Yes : Is2D::No);
 }

 // https://tc39.github.io/ecma262/#sec-samevaluezero
 static bool sameValueZero(double a, double b)
 {
     if (std::isnan(a) && std::isnan(b))
         return true;
     return a == b;
 }

 // https://drafts.fxtf.org/geometry/#matrix-validate-and-fixup
 ExceptionOr<void> DOMMatrixReadOnly::validateAndFixup(DOMMatrix2DInit& init)
 {
     if (init.a && init.m11 && !sameValueZero(init.a.value(), init.m11.value()))
         return Exception { TypeError, "init.a and init.m11 do not match"_s };
     if (init.b && init.m12 && !sameValueZero(init.b.value(), init.m12.value()))
         return Exception { TypeError, "init.b and init.m12 do not match"_s };
     if (init.c && init.m21 && !sameValueZero(init.c.value(), init.m21.value()))
         return Exception { TypeError, "init.c and init.m21 do not match"_s };
     if (init.d && init.m22 && !sameValueZero(init.d.value(), init.m22.value()))
         return Exception { TypeError, "init.d and init.m22 do not match"_s };
     if (init.e && init.m41 && !sameValueZero(init.e.value(), init.m41.value()))
         return Exception { TypeError, "init.e and init.m41 do not match"_s };
     if (init.f && init.m42 && !sameValueZero(init.f.value(), init.m42.value()))
         return Exception { TypeError, "init.f and init.m42 do not match"_s };

     if (!init.m11)
         init.m11 = init.a.valueOr(1);
     if (!init.m12)
         init.m12 = init.b.valueOr(0);
     if (!init.m21)
         init.m21 = init.c.valueOr(0);
     if (!init.m22)
         init.m22 = init.d.valueOr(1);
     if (!init.m41)
         init.m41 = init.e.valueOr(0);
     if (!init.m42)
         init.m42 = init.f.valueOr(0);

     return { };
 }

 ExceptionOr<void> DOMMatrixReadOnly::validateAndFixup(DOMMatrixInit& init)
 {
     auto validate2D = validateAndFixup(static_cast<DOMMatrix2DInit&>(init));
     if (validate2D.hasException())
         return validate2D.releaseException();

     if (init.is2D && init.is2D.value()) {
         if (init.m13)
             return Exception { TypeError, "m13 should be 0 for a 2D matrix"_s };
         if (init.m14)
             return Exception { TypeError, "m14 should be 0 for a 2D matrix"_s };
         if (init.m23)
             return Exception { TypeError, "m23 should be 0 for a 2D matrix"_s };
         if (init.m24)
             return Exception { TypeError, "m24 should be 0 for a 2D matrix"_s };
         if (init.m31)
             return Exception { TypeError, "m31 should be 0 for a 2D matrix"_s };
         if (init.m32)
             return Exception { TypeError, "m32 should be 0 for a 2D matrix"_s };
         if (init.m34)
             return Exception { TypeError, "m34 should be 0 for a 2D matrix"_s };
         if (init.m43)
             return Exception { TypeError, "m43 should be 0 for a 2D matrix"_s };
         if (init.m33 != 1)
             return Exception { TypeError, "m33 should be 1 for a 2D matrix"_s };
         if (init.m44 != 1)
             return Exception { TypeError, "m44 should be 1 for a 2D matrix"_s };
     }

     if (!init.is2D) {
         if (init.m13 || init.m14 || init.m23 || init.m24 || init.m31 || init.m32 || init.m34 || init.m43 || init.m33 != 1 || init.m44 != 1)
             init.is2D = false;
         else
             init.is2D = true;
     }
     return { };
 }

 ExceptionOr<Ref<DOMMatrixReadOnly>> DOMMatrixReadOnly::fromMatrix(DOMMatrixInit&& init)
 {
     return fromMatrixHelper<DOMMatrixReadOnly>(WTFMove(init));
 }

 ExceptionOr<Ref<DOMMatrixReadOnly>> DOMMatrixReadOnly::fromFloat32Array(Ref<Float32Array>&& array32)
 {
     if (array32->length() == 6)
         return DOMMatrixReadOnly::create(TransformationMatrix(array32->item(0), array32->item(1), array32->item(2), array32->item(3), array32->item(4), array32->item(5)), Is2D::Yes);

     if (array32->length() == 16) {
         return DOMMatrixReadOnly::create(TransformationMatrix(
             array32->item(0), array32->item(1), array32->item(2), array32->item(3),
             array32->item(4), array32->item(5), array32->item(6), array32->item(7),
             array32->item(8), array32->item(9), array32->item(10), array32->item(11),
             array32->item(12), array32->item(13), array32->item(14), array32->item(15)
         ), Is2D::No);
     }

     return Exception { TypeError };
 }

 ExceptionOr<Ref<DOMMatrixReadOnly>> DOMMatrixReadOnly::fromFloat64Array(Ref<Float64Array>&& array64)
 {
     if (array64->length() == 6)
         return DOMMatrixReadOnly::create(TransformationMatrix(array64->item(0), array64->item(1), array64->item(2), array64->item(3), array64->item(4), array64->item(5)), Is2D::Yes);

     if (array64->length() == 16) {
         return DOMMatrixReadOnly::create(TransformationMatrix(
             array64->item(0), array64->item(1), array64->item(2), array64->item(3),
             array64->item(4), array64->item(5), array64->item(6), array64->item(7),
             array64->item(8), array64->item(9), array64->item(10), array64->item(11),
             array64->item(12), array64->item(13), array64->item(14), array64->item(15)
         ), Is2D::No);
     }

     return Exception { TypeError };
 }

 bool DOMMatrixReadOnly::isIdentity() const
 {
     return m_matrix.isIdentity();
 }

 ExceptionOr<DOMMatrixReadOnly::AbstractMatrix> DOMMatrixReadOnly::parseStringIntoAbstractMatrix(const String& string)
 {
     if (string.isEmpty())
         return AbstractMatrix { };

     auto styleDeclaration = MutableStyleProperties::create();
     if (CSSParser::parseValue(styleDeclaration, CSSPropertyTransform, string, true, HTMLStandardMode) == CSSParser::ParseResult::Error)
         return Exception { SyntaxError };

     // Convert to TransformOperations. This can fail if a property requires style (i.e., param uses 'ems' or 'exs')
     auto value = styleDeclaration->getPropertyCSSValue(CSSPropertyTransform);

     // Check for a "none" or empty transform. In these cases we can use the default identity matrix.
     if (!value || (is<CSSPrimitiveValue>(*value) && downcast<CSSPrimitiveValue>(*value).valueID() == CSSValueNone))
         return AbstractMatrix { };

     TransformOperations operations;
     if (!transformsForValue(*value, CSSToLengthConversionData(), operations))
         return Exception { SyntaxError };

     AbstractMatrix matrix;
     for (auto& operation : operations.operations()) {
         if (operation->apply(matrix.matrix, { 0, 0 }))
             return Exception { SyntaxError };
         if (operation->is3DOperation())
             matrix.is2D = false;
     }

     return matrix;
 }

 // https://drafts.fxtf.org/geometry/#dom-dommatrix-setmatrixvalue
 ExceptionOr<void> DOMMatrixReadOnly::setMatrixValue(const String& string)
 {
     auto parseResult = parseStringIntoAbstractMatrix(string);
     if (parseResult.hasException())
         return parseResult.releaseException();

     m_is2D = parseResult.returnValue().is2D;
     m_matrix = parseResult.returnValue().matrix;
     return { };
 }

 Ref<DOMMatrix> DOMMatrixReadOnly::translate(double tx, double ty, double tz)
 {
     auto matrix = cloneAsDOMMatrix();
     return matrix->translateSelf(tx, ty, tz);
 }

 // https://drafts.fxtf.org/geometry/#dom-dommatrixreadonly-flipx
 Ref<DOMMatrix> DOMMatrixReadOnly::flipX()
 {
     auto matrix = cloneAsDOMMatrix();
     matrix->m_matrix.flipX();
     return matrix;
 }

 // https://drafts.fxtf.org/geometry/#dom-dommatrixreadonly-flipy
 Ref<DOMMatrix> DOMMatrixReadOnly::flipY()
 {
     auto matrix = cloneAsDOMMatrix();
     matrix->m_matrix.flipY();
     return matrix;
 }

 ExceptionOr<Ref<DOMMatrix>> DOMMatrixReadOnly::multiply(DOMMatrixInit&& other) const
 {
     auto matrix = cloneAsDOMMatrix();
     return matrix->multiplySelf(WTFMove(other));
 }

 Ref<DOMMatrix> DOMMatrixReadOnly::scale(double scaleX, Optional<double> scaleY, double scaleZ, double originX, double originY, double originZ)
 {
     auto matrix = cloneAsDOMMatrix();
     return matrix->scaleSelf(scaleX, scaleY, scaleZ, originX, originY, originZ);
 }

 Ref<DOMMatrix> DOMMatrixReadOnly::scale3d(double scale, double originX, double originY, double originZ)
 {
     auto matrix = cloneAsDOMMatrix();
     return matrix->scale3dSelf(scale, originX, originY, originZ);
 }

 Ref<DOMMatrix> DOMMatrixReadOnly::rotate(double rotX, Optional<double> rotY, Optional<double> rotZ)
 {
     auto matrix = cloneAsDOMMatrix();
     return matrix->rotateSelf(rotX, rotY, rotZ);
 }

 Ref<DOMMatrix> DOMMatrixReadOnly::rotateFromVector(double x, double y)
 {
     auto matrix = cloneAsDOMMatrix();
     return matrix->rotateFromVectorSelf(x, y);
 }

 Ref<DOMMatrix> DOMMatrixReadOnly::rotateAxisAngle(double x, double y, double z, double angle)
 {
     auto matrix = cloneAsDOMMatrix();
     return matrix->rotateAxisAngleSelf(x, y, z, angle);
 }

 Ref<DOMMatrix> DOMMatrixReadOnly::skewX(double sx)
 {
     auto matrix = cloneAsDOMMatrix();
     return matrix->skewXSelf(sx);
 }

 Ref<DOMMatrix> DOMMatrixReadOnly::skewY(double sy)
 {
     auto matrix = cloneAsDOMMatrix();
     return matrix->skewYSelf(sy);
 }

 Ref<DOMMatrix> DOMMatrixReadOnly::inverse() const
 {
     auto matrix = cloneAsDOMMatrix();
     return matrix->invertSelf();
 }

 // https://drafts.fxtf.org/geometry/#dom-dommatrixreadonly-transformpoint
 Ref<DOMPoint> DOMMatrixReadOnly::transformPoint(DOMPointInit&& pointInit)
 {
     m_matrix.map4ComponentPoint(pointInit.x, pointInit.y, pointInit.z, pointInit.w);
     return DOMPoint::create(pointInit.x, pointInit.y, pointInit.z, pointInit.w);
 }

 ExceptionOr<Ref<Float32Array>> DOMMatrixReadOnly::toFloat32Array() const
 {
     auto array32 = Float32Array::tryCreateUninitialized(16);
     if (!array32)
         return Exception { UnknownError, "Out of memory"_s };

     unsigned index = 0;
     array32->set(index++, m_matrix.m11());
     array32->set(index++, m_matrix.m12());
     array32->set(index++, m_matrix.m13());
     array32->set(index++, m_matrix.m14());
     array32->set(index++, m_matrix.m21());
     array32->set(index++, m_matrix.m22());
     array32->set(index++, m_matrix.m23());
     array32->set(index++, m_matrix.m24());
     array32->set(index++, m_matrix.m31());
     array32->set(index++, m_matrix.m32());
     array32->set(index++, m_matrix.m33());
     array32->set(index++, m_matrix.m34());
     array32->set(index++, m_matrix.m41());
     array32->set(index++, m_matrix.m42());
     array32->set(index++, m_matrix.m43());
     array32->set(index, m_matrix.m44());
     return array32.releaseNonNull();
 }

 ExceptionOr<Ref<Float64Array>> DOMMatrixReadOnly::toFloat64Array() const
 {
     auto array64 = Float64Array::tryCreateUninitialized(16);
     if (!array64)
         return Exception { UnknownError, "Out of memory"_s };

     unsigned index = 0;
     array64->set(index++, m_matrix.m11());
     array64->set(index++, m_matrix.m12());
     array64->set(index++, m_matrix.m13());
     array64->set(index++, m_matrix.m14());
     array64->set(index++, m_matrix.m21());
     array64->set(index++, m_matrix.m22());
     array64->set(index++, m_matrix.m23());
     array64->set(index++, m_matrix.m24());
     array64->set(index++, m_matrix.m31());
     array64->set(index++, m_matrix.m32());
     array64->set(index++, m_matrix.m33());
     array64->set(index++, m_matrix.m34());
     array64->set(index++, m_matrix.m41());
     array64->set(index++, m_matrix.m42());
     array64->set(index++, m_matrix.m43());
     array64->set(index, m_matrix.m44());
     return array64.releaseNonNull();
 }

 // https://drafts.fxtf.org/geometry/#dom-dommatrixreadonly-stringifier
 ExceptionOr<String> DOMMatrixReadOnly::toString() const
 {
     if (!m_matrix.containsOnlyFiniteValues())
         return Exception { InvalidStateError, "Matrix contains non-finite values"_s };

     if (is2D())
         return makeString("matrix(", m_matrix.a(), ", ", m_matrix.b(), ", ", m_matrix.c(), ", ", m_matrix.d(), ", ", m_matrix.e(), ", ", m_matrix.f(), ')');

     return makeString("matrix3d(", m_matrix.m11(), ", ", m_matrix.m12(), ", ", m_matrix.m13(), ", ", m_matrix.m14(), ", ", m_matrix.m21(), ", ", m_matrix.m22(), ", ", m_matrix.m23(), ", ", m_matrix.m24(), ", ", m_matrix.m31(), ", ", m_matrix.m32(), ", ", m_matrix.m33(), ", ", m_matrix.m34(), ", ", m_matrix.m41(), ", ", m_matrix.m42(), ", ", m_matrix.m43(), ", ", m_matrix.m44(), ')');
 }

 } // namespace WebCore
	/*
	* Copyright (C) 2017-2019 Apple Inc. All rights reserved.
	*
	* Redistribution and use in source and binary forms, with or without
	* modification, are permitted provided that the following conditions
	* are met:
	* 1. Redistributions of source code must retain the above copyright
	* notice, this list of conditions and the following disclaimer.
	* 2. Redistributions in binary form must reproduce the above copyright
	* notice, this list of conditions and the following disclaimer in the
	* documentation and/or other materials provided with the distribution.
	*
	* THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
	* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
	* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
	* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
	* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
	* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
	* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
	* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
	* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
	* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
	* THE POSSIBILITY OF SUCH DAMAGE.
	*/

	#include "config.h"
	#include "DOMMatrixReadOnly.h"

	#include "CSSParser.h"
	#include "CSSToLengthConversionData.h"
	#include "DOMMatrix.h"
	#include "DOMPoint.h"
	#include "ScriptExecutionContext.h"
	#include "StyleProperties.h"
	#include "TransformFunctions.h"
	#include <JavaScriptCore/GenericTypedArrayViewInlines.h>
	#include <JavaScriptCore/HeapInlines.h>
	#include <JavaScriptCore/JSGenericTypedArrayViewInlines.h>
	#include <wtf/IsoMallocInlines.h>
	#include <wtf/text/StringBuilder.h>

	namespace WebCore {

	WTF_MAKE_ISO_ALLOCATED_IMPL(DOMMatrixReadOnly);

	// https://drafts.fxtf.org/geometry/#dom-dommatrixreadonly-dommatrixreadonly
	ExceptionOr<Ref<DOMMatrixReadOnly>> DOMMatrixReadOnly::create(ScriptExecutionContext& scriptExecutionContext, Optional<Variant<String, Vector<double>>>&& init)
	{
	if (!init)
	return adoptRef(*new DOMMatrixReadOnly);

	return WTF::switchOn(init.value(),
	[&scriptExecutionContext](const String& init) -> ExceptionOr<Ref<DOMMatrixReadOnly>> {
	if (!scriptExecutionContext.isDocument())
	return Exception { TypeError };

	auto parseResult = parseStringIntoAbstractMatrix(init);
	if (parseResult.hasException())
	return parseResult.releaseException();

	return adoptRef(*new DOMMatrixReadOnly(parseResult.returnValue().matrix, parseResult.returnValue().is2D ? Is2D::Yes : Is2D::No));
	},
	[](const Vector<double>& init) -> ExceptionOr<Ref<DOMMatrixReadOnly>> {
	if (init.size() == 6) {
	return adoptRef(*new DOMMatrixReadOnly(TransformationMatrix {
	init[0], init[1], init[2], init[3], init[4], init[5]
	}, Is2D::Yes));
	}
	if (init.size() == 16) {
	return adoptRef(*new DOMMatrixReadOnly(TransformationMatrix {
	init[0], init[1], init[2], init[3],
	init[4], init[5], init[6], init[7],
	init[8], init[9], init[10], init[11],
	init[12], init[13], init[14], init[15]
	}, Is2D::No));
	}
	return Exception { TypeError };
	}
	);
	}

	DOMMatrixReadOnly::DOMMatrixReadOnly(const TransformationMatrix& matrix, Is2D is2D)
	: m_matrix(matrix)
	, m_is2D(is2D == Is2D::Yes)
	{
	ASSERT(!m_is2D \|\| m_matrix.isAffine());
	}

	DOMMatrixReadOnly::DOMMatrixReadOnly(TransformationMatrix&& matrix, Is2D is2D)
	: m_matrix(WTFMove(matrix))
	, m_is2D(is2D == Is2D::Yes)
	{
	ASSERT(!m_is2D \|\| m_matrix.isAffine());
	}

	inline Ref<DOMMatrix> DOMMatrixReadOnly::cloneAsDOMMatrix() const
	{
	return DOMMatrix::create(m_matrix, m_is2D ? Is2D::Yes : Is2D::No);
	}

	// https://tc39.github.io/ecma262/#sec-samevaluezero
	static bool sameValueZero(double a, double b)
	{
	if (std::isnan(a) && std::isnan(b))
	return true;
	return a == b;
	}

	// https://drafts.fxtf.org/geometry/#matrix-validate-and-fixup
	ExceptionOr<void> DOMMatrixReadOnly::validateAndFixup(DOMMatrix2DInit& init)
	{
	if (init.a && init.m11 && !sameValueZero(init.a.value(), init.m11.value()))
	return Exception { TypeError, "init.a and init.m11 do not match"_s };
	if (init.b && init.m12 && !sameValueZero(init.b.value(), init.m12.value()))
	return Exception { TypeError, "init.b and init.m12 do not match"_s };
	if (init.c && init.m21 && !sameValueZero(init.c.value(), init.m21.value()))
	return Exception { TypeError, "init.c and init.m21 do not match"_s };
	if (init.d && init.m22 && !sameValueZero(init.d.value(), init.m22.value()))
	return Exception { TypeError, "init.d and init.m22 do not match"_s };
	if (init.e && init.m41 && !sameValueZero(init.e.value(), init.m41.value()))
	return Exception { TypeError, "init.e and init.m41 do not match"_s };
	if (init.f && init.m42 && !sameValueZero(init.f.value(), init.m42.value()))
	return Exception { TypeError, "init.f and init.m42 do not match"_s };

	if (!init.m11)
	init.m11 = init.a.valueOr(1);
	if (!init.m12)
	init.m12 = init.b.valueOr(0);
	if (!init.m21)
	init.m21 = init.c.valueOr(0);
	if (!init.m22)
	init.m22 = init.d.valueOr(1);
	if (!init.m41)
	init.m41 = init.e.valueOr(0);
	if (!init.m42)
	init.m42 = init.f.valueOr(0);

	return { };
	}

	ExceptionOr<void> DOMMatrixReadOnly::validateAndFixup(DOMMatrixInit& init)
	{
	auto validate2D = validateAndFixup(static_cast<DOMMatrix2DInit&>(init));
	if (validate2D.hasException())
	return validate2D.releaseException();

	if (init.is2D && init.is2D.value()) {
	if (init.m13)
	return Exception { TypeError, "m13 should be 0 for a 2D matrix"_s };
	if (init.m14)
	return Exception { TypeError, "m14 should be 0 for a 2D matrix"_s };
	if (init.m23)
	return Exception { TypeError, "m23 should be 0 for a 2D matrix"_s };
	if (init.m24)
	return Exception { TypeError, "m24 should be 0 for a 2D matrix"_s };
	if (init.m31)
	return Exception { TypeError, "m31 should be 0 for a 2D matrix"_s };
	if (init.m32)
	return Exception { TypeError, "m32 should be 0 for a 2D matrix"_s };
	if (init.m34)
	return Exception { TypeError, "m34 should be 0 for a 2D matrix"_s };
	if (init.m43)
	return Exception { TypeError, "m43 should be 0 for a 2D matrix"_s };
	if (init.m33 != 1)
	return Exception { TypeError, "m33 should be 1 for a 2D matrix"_s };
	if (init.m44 != 1)
	return Exception { TypeError, "m44 should be 1 for a 2D matrix"_s };
	}

	if (!init.is2D) {
	if (init.m13 \|\| init.m14 \|\| init.m23 \|\| init.m24 \|\| init.m31 \|\| init.m32 \|\| init.m34 \|\| init.m43 \|\| init.m33 != 1 \|\| init.m44 != 1)
	init.is2D = false;
	else
	init.is2D = true;
	}
	return { };
	}

	ExceptionOr<Ref<DOMMatrixReadOnly>> DOMMatrixReadOnly::fromMatrix(DOMMatrixInit&& init)
	{
	return fromMatrixHelper<DOMMatrixReadOnly>(WTFMove(init));
	}

	ExceptionOr<Ref<DOMMatrixReadOnly>> DOMMatrixReadOnly::fromFloat32Array(Ref<Float32Array>&& array32)
	{
	if (array32->length() == 6)
	return DOMMatrixReadOnly::create(TransformationMatrix(array32->item(0), array32->item(1), array32->item(2), array32->item(3), array32->item(4), array32->item(5)), Is2D::Yes);

	if (array32->length() == 16) {
	return DOMMatrixReadOnly::create(TransformationMatrix(
	array32->item(0), array32->item(1), array32->item(2), array32->item(3),
	array32->item(4), array32->item(5), array32->item(6), array32->item(7),
	array32->item(8), array32->item(9), array32->item(10), array32->item(11),
	array32->item(12), array32->item(13), array32->item(14), array32->item(15)
	), Is2D::No);
	}

	return Exception { TypeError };
	}

	ExceptionOr<Ref<DOMMatrixReadOnly>> DOMMatrixReadOnly::fromFloat64Array(Ref<Float64Array>&& array64)
	{
	if (array64->length() == 6)
	return DOMMatrixReadOnly::create(TransformationMatrix(array64->item(0), array64->item(1), array64->item(2), array64->item(3), array64->item(4), array64->item(5)), Is2D::Yes);

	if (array64->length() == 16) {
	return DOMMatrixReadOnly::create(TransformationMatrix(
	array64->item(0), array64->item(1), array64->item(2), array64->item(3),
	array64->item(4), array64->item(5), array64->item(6), array64->item(7),
	array64->item(8), array64->item(9), array64->item(10), array64->item(11),
	array64->item(12), array64->item(13), array64->item(14), array64->item(15)
	), Is2D::No);
	}

	return Exception { TypeError };
	}

	bool DOMMatrixReadOnly::isIdentity() const
	{
	return m_matrix.isIdentity();
	}

	ExceptionOr<DOMMatrixReadOnly::AbstractMatrix> DOMMatrixReadOnly::parseStringIntoAbstractMatrix(const String& string)
	{
	if (string.isEmpty())
	return AbstractMatrix { };

	auto styleDeclaration = MutableStyleProperties::create();
	if (CSSParser::parseValue(styleDeclaration, CSSPropertyTransform, string, true, HTMLStandardMode) == CSSParser::ParseResult::Error)
	return Exception { SyntaxError };

	// Convert to TransformOperations. This can fail if a property requires style (i.e., param uses 'ems' or 'exs')
	auto value = styleDeclaration->getPropertyCSSValue(CSSPropertyTransform);

	// Check for a "none" or empty transform. In these cases we can use the default identity matrix.
	if (!value \|\| (is<CSSPrimitiveValue>(value) && downcast<CSSPrimitiveValue>(value).valueID() == CSSValueNone))
	return AbstractMatrix { };

	TransformOperations operations;
	if (!transformsForValue(*value, CSSToLengthConversionData(), operations))
	return Exception { SyntaxError };

	AbstractMatrix matrix;
	for (auto& operation : operations.operations()) {
	if (operation->apply(matrix.matrix, { 0, 0 }))
	return Exception { SyntaxError };
	if (operation->is3DOperation())
	matrix.is2D = false;
	}

	return matrix;
	}

	// https://drafts.fxtf.org/geometry/#dom-dommatrix-setmatrixvalue
	ExceptionOr<void> DOMMatrixReadOnly::setMatrixValue(const String& string)
	{
	auto parseResult = parseStringIntoAbstractMatrix(string);
	if (parseResult.hasException())
	return parseResult.releaseException();

	m_is2D = parseResult.returnValue().is2D;
	m_matrix = parseResult.returnValue().matrix;
	return { };
	}

	Ref<DOMMatrix> DOMMatrixReadOnly::translate(double tx, double ty, double tz)
	{
	auto matrix = cloneAsDOMMatrix();
	return matrix->translateSelf(tx, ty, tz);
	}

	// https://drafts.fxtf.org/geometry/#dom-dommatrixreadonly-flipx
	Ref<DOMMatrix> DOMMatrixReadOnly::flipX()
	{
	auto matrix = cloneAsDOMMatrix();
	matrix->m_matrix.flipX();
	return matrix;
	}

	// https://drafts.fxtf.org/geometry/#dom-dommatrixreadonly-flipy
	Ref<DOMMatrix> DOMMatrixReadOnly::flipY()
	{
	auto matrix = cloneAsDOMMatrix();
	matrix->m_matrix.flipY();
	return matrix;
	}

	ExceptionOr<Ref<DOMMatrix>> DOMMatrixReadOnly::multiply(DOMMatrixInit&& other) const
	{
	auto matrix = cloneAsDOMMatrix();
	return matrix->multiplySelf(WTFMove(other));
	}

	Ref<DOMMatrix> DOMMatrixReadOnly::scale(double scaleX, Optional<double> scaleY, double scaleZ, double originX, double originY, double originZ)
	{
	auto matrix = cloneAsDOMMatrix();
	return matrix->scaleSelf(scaleX, scaleY, scaleZ, originX, originY, originZ);
	}

	Ref<DOMMatrix> DOMMatrixReadOnly::scale3d(double scale, double originX, double originY, double originZ)
	{
	auto matrix = cloneAsDOMMatrix();
	return matrix->scale3dSelf(scale, originX, originY, originZ);
	}

	Ref<DOMMatrix> DOMMatrixReadOnly::rotate(double rotX, Optional<double> rotY, Optional<double> rotZ)
	{
	auto matrix = cloneAsDOMMatrix();
	return matrix->rotateSelf(rotX, rotY, rotZ);
	}

	Ref<DOMMatrix> DOMMatrixReadOnly::rotateFromVector(double x, double y)
	{
	auto matrix = cloneAsDOMMatrix();
	return matrix->rotateFromVectorSelf(x, y);
	}

	Ref<DOMMatrix> DOMMatrixReadOnly::rotateAxisAngle(double x, double y, double z, double angle)
	{
	auto matrix = cloneAsDOMMatrix();
	return matrix->rotateAxisAngleSelf(x, y, z, angle);
	}

	Ref<DOMMatrix> DOMMatrixReadOnly::skewX(double sx)
	{
	auto matrix = cloneAsDOMMatrix();
	return matrix->skewXSelf(sx);
	}

	Ref<DOMMatrix> DOMMatrixReadOnly::skewY(double sy)
	{
	auto matrix = cloneAsDOMMatrix();
	return matrix->skewYSelf(sy);
	}

	Ref<DOMMatrix> DOMMatrixReadOnly::inverse() const
	{
	auto matrix = cloneAsDOMMatrix();
	return matrix->invertSelf();
	}

	// https://drafts.fxtf.org/geometry/#dom-dommatrixreadonly-transformpoint
	Ref<DOMPoint> DOMMatrixReadOnly::transformPoint(DOMPointInit&& pointInit)
	{
	m_matrix.map4ComponentPoint(pointInit.x, pointInit.y, pointInit.z, pointInit.w);
	return DOMPoint::create(pointInit.x, pointInit.y, pointInit.z, pointInit.w);
	}

	ExceptionOr<Ref<Float32Array>> DOMMatrixReadOnly::toFloat32Array() const
	{
	auto array32 = Float32Array::tryCreateUninitialized(16);
	if (!array32)
	return Exception { UnknownError, "Out of memory"_s };

	unsigned index = 0;
	array32->set(index++, m_matrix.m11());
	array32->set(index++, m_matrix.m12());
	array32->set(index++, m_matrix.m13());
	array32->set(index++, m_matrix.m14());
	array32->set(index++, m_matrix.m21());
	array32->set(index++, m_matrix.m22());
	array32->set(index++, m_matrix.m23());
	array32->set(index++, m_matrix.m24());
	array32->set(index++, m_matrix.m31());
	array32->set(index++, m_matrix.m32());
	array32->set(index++, m_matrix.m33());
	array32->set(index++, m_matrix.m34());
	array32->set(index++, m_matrix.m41());
	array32->set(index++, m_matrix.m42());
	array32->set(index++, m_matrix.m43());
	array32->set(index, m_matrix.m44());
	return array32.releaseNonNull();
	}

	ExceptionOr<Ref<Float64Array>> DOMMatrixReadOnly::toFloat64Array() const
	{
	auto array64 = Float64Array::tryCreateUninitialized(16);
	if (!array64)
	return Exception { UnknownError, "Out of memory"_s };

	unsigned index = 0;
	array64->set(index++, m_matrix.m11());
	array64->set(index++, m_matrix.m12());
	array64->set(index++, m_matrix.m13());
	array64->set(index++, m_matrix.m14());
	array64->set(index++, m_matrix.m21());
	array64->set(index++, m_matrix.m22());
	array64->set(index++, m_matrix.m23());
	array64->set(index++, m_matrix.m24());
	array64->set(index++, m_matrix.m31());
	array64->set(index++, m_matrix.m32());
	array64->set(index++, m_matrix.m33());
	array64->set(index++, m_matrix.m34());
	array64->set(index++, m_matrix.m41());
	array64->set(index++, m_matrix.m42());
	array64->set(index++, m_matrix.m43());
	array64->set(index, m_matrix.m44());
	return array64.releaseNonNull();
	}

	// https://drafts.fxtf.org/geometry/#dom-dommatrixreadonly-stringifier
	ExceptionOr<String> DOMMatrixReadOnly::toString() const
	{
	if (!m_matrix.containsOnlyFiniteValues())
	return Exception { InvalidStateError, "Matrix contains non-finite values"_s };

	if (is2D())
	return makeString("matrix(", m_matrix.a(), ", ", m_matrix.b(), ", ", m_matrix.c(), ", ", m_matrix.d(), ", ", m_matrix.e(), ", ", m_matrix.f(), ')');

	return makeString("matrix3d(", m_matrix.m11(), ", ", m_matrix.m12(), ", ", m_matrix.m13(), ", ", m_matrix.m14(), ", ", m_matrix.m21(), ", ", m_matrix.m22(), ", ", m_matrix.m23(), ", ", m_matrix.m24(), ", ", m_matrix.m31(), ", ", m_matrix.m32(), ", ", m_matrix.m33(), ", ", m_matrix.m34(), ", ", m_matrix.m41(), ", ", m_matrix.m42(), ", ", m_matrix.m43(), ", ", m_matrix.m44(), ')');
	}

	} // namespace WebCore