| /* |
| * 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 "CSSBorderImageOutsetValue.h" |
| #include "CSSBorderImageRepeatValue.h" |
| #include "CSSBorderImageSliceValue.h" |
| #include "CSSBorderImageSourceValue.h" |
| #include "CSSBorderImageWidthValue.h" |
| #include "CSSKeywordValueInlines.h" |
| #include "CSSMaskBorderOutsetValue.h" |
| #include "CSSMaskBorderRepeatValue.h" |
| #include "CSSMaskBorderSliceValue.h" |
| #include "CSSMaskBorderSourceValue.h" |
| #include "CSSMaskBorderWidthValue.h" |
| #include "CSSOffsetRotateValue.h" |
| #include "CSSPrimitiveValue.h" |
| #include "CSSPropertyNames.h" |
| #include "CSSUnevaluatedCalc.h" |
| #include "CSSUnits.h" |
| #include "CSSValueKeywords.h" |
| #include "CSSValuePair.h" |
| #include <wtf/Variant.h> |
| #include <wtf/text/ASCIILiteral.h> |
| |
| namespace WebCore { |
| |
| static bool NODELETE isValueIDPair(const CSSValue& value, CSSValueID valueID) |
| { |
| return value.isPair() && isValueID(value.first(), valueID) && isValueID(value.second(), valueID); |
| } |
| |
| // FIXME: SUPPRESS_NODELETE shouldn't be necessary. |
| SUPPRESS_NODELETE static bool NODELETE isNumber(const CSSPrimitiveValue& value, CSSPrimitiveValue::Raw number) |
| { |
| return WTF::switchOn(value, |
| [&](const CSSPrimitiveValue::Calc&) { |
| return false; |
| }, |
| [&](const CSSPrimitiveValue::Raw& raw) { |
| return raw == number; |
| } |
| ); |
| } |
| |
| // FIXME: SUPPRESS_NODELETE shouldn't be necessary. |
| template<auto unit> |
| SUPPRESS_NODELETE static bool NODELETE isNumber(const CSSPrimitiveValue& value, CSS::ValueLiteral<unit> literal) |
| { |
| return WTF::switchOn(value, |
| [&](const CSSPrimitiveValue::Calc&) { |
| return false; |
| }, |
| [&](const CSSPrimitiveValue::Raw& raw) { |
| return raw.unit == toCSSUnitType(literal.unit) |
| && raw.value == literal.value; |
| } |
| ); |
| } |
| |
| static bool NODELETE isNumber(const CSSPrimitiveValue* value, auto number) |
| { |
| return value && isNumber(*value, number); |
| } |
| |
| static bool NODELETE isNumber(const CSSValue& value, auto number) |
| { |
| return isNumber(dynamicDowncast<CSSPrimitiveValue>(value), number); |
| } |
| |
| bool isInitialValueForLonghand(CSSPropertyID longhand, const CSSValue& value) |
| { |
| using namespace CSS::Literals; |
| |
| if (value.isImplicitInitialValue()) |
| return true; |
| switch (longhand) { |
| case CSSPropertyBackgroundSize: |
| case CSSPropertyMaskSize: |
| if (isValueIDPair(value, CSSValueAuto)) |
| return true; |
| break; |
| case CSSPropertyBorderImageOutset: |
| if (auto outsetValue = dynamicDowncast<CSSBorderImageOutsetValue>(value)) { |
| if (outsetValue->outsets().values.allOf([](auto& edge) { return edge == 0_css_number; })) |
| return true; |
| } |
| break; |
| case CSSPropertyMaskBorderOutset: |
| if (auto outsetValue = dynamicDowncast<CSSMaskBorderOutsetValue>(value)) { |
| if (outsetValue->outsets().values.allOf([](auto& edge) { return edge == 0_css_number; })) |
| return true; |
| } |
| break; |
| case CSSPropertyBorderImageRepeat: |
| if (auto repeatValue = dynamicDowncast<CSSBorderImageRepeatValue>(value)) { |
| if (repeatValue->repeats().values.allOf([](auto& edge) { return WTF::holdsAlternative<CSS::Keyword::Stretch>(edge); })) |
| return true; |
| } |
| break; |
| case CSSPropertyMaskBorderRepeat: |
| if (auto repeatValue = dynamicDowncast<CSSMaskBorderRepeatValue>(value)) { |
| if (repeatValue->repeats().values.allOf([](auto& edge) { return WTF::holdsAlternative<CSS::Keyword::Stretch>(edge); })) |
| return true; |
| } |
| break; |
| case CSSPropertyBorderImageSlice: |
| if (auto sliceValue = dynamicDowncast<CSSBorderImageSliceValue>(value)) { |
| if (!sliceValue->slices().fill.has_value() && sliceValue->slices().values.allOf([](auto& edge) { return edge == 100_css_percentage; })) |
| return true; |
| } |
| break; |
| case CSSPropertyMaskBorderSlice: |
| if (auto sliceValue = dynamicDowncast<CSSMaskBorderSliceValue>(value)) { |
| if (!sliceValue->slices().fill.has_value() && sliceValue->slices().values.allOf([](auto& edge) { return edge == 0_css_number; })) |
| return true; |
| } |
| return false; |
| case CSSPropertyBorderImageWidth: |
| if (auto widthValue = dynamicDowncast<CSSBorderImageWidthValue>(value)) { |
| if (!widthValue->widths().legacyWebkitBorderImage && widthValue->widths().values.allOf([](auto& edge) { return edge == 1_css_number; })) |
| return true; |
| } |
| break; |
| case CSSPropertyMaskBorderWidth: |
| if (auto widthValue = dynamicDowncast<CSSMaskBorderWidthValue>(value)) { |
| if (widthValue->widths().values.allOf([](auto& edge) { return edge.isAuto(); })) |
| return true; |
| } |
| break; |
| case CSSPropertyBorderImageSource: |
| if (auto sourceValue = dynamicDowncast<CSSBorderImageSourceValue>(value)) { |
| if (sourceValue->source().isNone()) |
| return true; |
| } |
| break; |
| case CSSPropertyMaskBorderSource: |
| if (auto sourceValue = dynamicDowncast<CSSMaskBorderSourceValue>(value)) { |
| if (sourceValue->source().isNone()) |
| return true; |
| } |
| break; |
| case CSSPropertyOffsetRotate: |
| if (auto rotateValue = dynamicDowncast<CSSOffsetRotateValue>(value)) { |
| if (rotateValue->isInitialValue()) |
| return true; |
| } |
| break; |
| default: |
| break; |
| } |
| return WTF::switchOn(initialValueForLonghand(longhand), |
| [&](CSSValueID initialValue) { |
| return isValueID(value, initialValue); |
| }, |
| [&](CSSPrimitiveValue::Raw initialValue) { |
| return isNumber(value, initialValue); |
| } |
| ); |
| } |
| |
| ASCIILiteral initialValueTextForLonghand(CSSPropertyID longhand) |
| { |
| return WTF::switchOn(initialValueForLonghand(longhand), |
| [](CSSValueID value) { |
| return nameLiteral(value); |
| }, |
| [](CSSPrimitiveValue::Raw initialValue) { |
| switch (initialValue.unit) { |
| case CSSUnitType::Number: |
| if (initialValue.value == 0.0) |
| return "0"_s; |
| if (initialValue.value == 1.0) |
| return "1"_s; |
| if (initialValue.value == 2.0) |
| return "2"_s; |
| if (initialValue.value == 4.0) |
| return "4"_s; |
| if (initialValue.value == 8.0) |
| return "8"_s; |
| break; |
| case CSSUnitType::Percentage: |
| if (initialValue.value == 0.0) |
| return "0%"_s; |
| if (initialValue.value == 50.0) |
| return "50%"_s; |
| if (initialValue.value == 100.0) |
| return "100%"_s; |
| break; |
| case CSSUnitType::Px: |
| if (initialValue.value == 0.0) |
| return "0px"_s; |
| if (initialValue.value == 1.0) |
| return "1px"_s; |
| break; |
| case CSSUnitType::S: |
| if (initialValue.value == 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; |
| }, |
| [](CSSPrimitiveValue::Raw) { |
| return CSSValueInvalid; |
| } |
| ); |
| } |
| |
| } // namespace WebCore |
