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/*
* Copyright (C) 2023-2025 Apple Inc. All rights reserved.
* Copyright (C) 2024-2025 Samuel Weinig <sam@webkit.org>
*
* 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. ``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
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* 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 "CSSPropertyInitialValues.h"
#include "CSSPropertyInitialValuesGeneratedInlines.h"
#include "CSSBorderImageSliceValue.h"
#include "CSSBorderImageWidthValue.h"
#include "CSSOffsetRotateValue.h"
#include "CSSPrimitiveValue.h"
#include "CSSPropertyNames.h"
#include "CSSQuadValue.h"
#include "CSSUnits.h"
#include "CSSValueKeywords.h"
#include "CSSValuePair.h"
#include "RectBase.h"
#include <wtf/Variant.h>
#include <wtf/text/ASCIILiteral.h>
namespace WebCore {
static bool isValueIDPair(const CSSValue& value, CSSValueID valueID)
{
return value.isPair() && isValueID(value.first(), valueID) && isValueID(value.second(), valueID);
}
static bool isNumber(const CSSPrimitiveValue& value, double number, CSSUnitType type)
{
return value.primitiveType() == type && !value.isCalculated() && value.valueNoConversionDataRequired<double>() == number;
}
static bool isNumber(const CSSPrimitiveValue* value, double number, CSSUnitType type)
{
return value && isNumber(*value, number, type);
}
static bool isNumber(const CSSValue& value, double number, CSSUnitType type)
{
return isNumber(dynamicDowncast<CSSPrimitiveValue>(value), number, type);
}
static bool isNumber(const RectBase& quad, double number, CSSUnitType type)
{
return isNumber(quad.top(), number, type)
&& isNumber(quad.right(), number, type)
&& isNumber(quad.bottom(), number, type)
&& isNumber(quad.left(), number, type);
}
static bool isValueID(const RectBase& quad, CSSValueID valueID)
{
return isValueID(quad.top(), valueID)
&& isValueID(quad.right(), valueID)
&& isValueID(quad.bottom(), valueID)
&& isValueID(quad.left(), valueID);
}
static bool isNumericQuad(const CSSValue& value, double number, CSSUnitType type)
{
return value.isQuad() && isNumber(value.quad(), number, type);
}
bool isInitialValueForLonghand(CSSPropertyID longhand, const CSSValue& value)
{
if (value.isImplicitInitialValue())
return true;
switch (longhand) {
case CSSPropertyBackgroundSize:
case CSSPropertyMaskSize:
if (isValueIDPair(value, CSSValueAuto))
return true;
break;
case CSSPropertyBorderImageOutset:
case CSSPropertyMaskBorderOutset:
if (isNumericQuad(value, 0, CSSUnitType::CSS_NUMBER))
return true;
break;
case CSSPropertyBorderImageRepeat:
case CSSPropertyMaskBorderRepeat:
if (isValueIDPair(value, CSSValueStretch))
return true;
break;
case CSSPropertyBorderImageSlice:
if (auto sliceValue = dynamicDowncast<CSSBorderImageSliceValue>(value)) {
if (!sliceValue->fill() && isNumber(sliceValue->slices(), 100, CSSUnitType::CSS_PERCENTAGE))
return true;
}
break;
case CSSPropertyBorderImageWidth:
if (auto widthValue = dynamicDowncast<CSSBorderImageWidthValue>(value)) {
if (!widthValue->overridesBorderWidths() && isNumber(widthValue->widths(), 1, CSSUnitType::CSS_NUMBER))
return true;
}
break;
case CSSPropertyOffsetRotate:
if (auto rotateValue = dynamicDowncast<CSSOffsetRotateValue>(value)) {
if (rotateValue->isInitialValue())
return true;
}
break;
case CSSPropertyMaskBorderSlice:
if (auto sliceValue = dynamicDowncast<CSSBorderImageSliceValue>(value)) {
if (!sliceValue->fill() && isNumber(sliceValue->slices(), 0, CSSUnitType::CSS_NUMBER))
return true;
}
return false;
case CSSPropertyMaskBorderWidth:
if (auto widthValue = dynamicDowncast<CSSBorderImageWidthValue>(value)) {
if (!widthValue->overridesBorderWidths() && isValueID(widthValue->widths(), CSSValueAuto))
return true;
}
break;
default:
break;
}
return WTF::switchOn(initialValueForLonghand(longhand),
[&](CSSValueID initialValue) {
return isValueID(value, initialValue);
},
[&](InitialNumericValue initialValue) {
return isNumber(value, initialValue.number, initialValue.type);
}
);
}
ASCIILiteral initialValueTextForLonghand(CSSPropertyID longhand)
{
return WTF::switchOn(initialValueForLonghand(longhand),
[](CSSValueID value) {
return nameLiteral(value);
},
[](InitialNumericValue initialValue) {
switch (initialValue.type) {
case CSSUnitType::CSS_NUMBER:
if (initialValue.number == 0.0)
return "0"_s;
if (initialValue.number == 1.0)
return "1"_s;
if (initialValue.number == 2.0)
return "2"_s;
if (initialValue.number == 4.0)
return "4"_s;
if (initialValue.number == 8.0)
return "8"_s;
break;
case CSSUnitType::CSS_PERCENTAGE:
if (initialValue.number == 0.0)
return "0%"_s;
if (initialValue.number == 50.0)
return "50%"_s;
if (initialValue.number == 100.0)
return "100%"_s;
break;
case CSSUnitType::CSS_PX:
if (initialValue.number == 0.0)
return "0px"_s;
if (initialValue.number == 1.0)
return "1px"_s;
break;
case CSSUnitType::CSS_S:
if (initialValue.number == 0.0)
return "0s"_s;
break;
default:
break;
}
ASSERT_NOT_REACHED();
return ""_s;
}
);
}
CSSValueID initialValueIDForLonghand(CSSPropertyID longhand)
{
return WTF::switchOn(initialValueForLonghand(longhand),
[](CSSValueID value) {
return value;
},
[](InitialNumericValue) {
return CSSValueInvalid;
}
);
}
} // namespace WebCore
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