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CSSPropertyParser.cpp
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2963 lines (2672 loc) · 119 KB
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// Copyright 2015 The Chromium Authors. All rights reserved.
// Copyright (C) 2016-2022 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:
//
// * Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
// * 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.
// * Neither the name of Google Inc. nor the names of its
// contributors may be used to endorse or promote products derived from
// this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND 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 THE COPYRIGHT
// OWNER OR 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 "CSSPropertyParser.h"
#include "CSSBorderImageSliceValue.h"
#include "CSSBorderImageWidthValue.h"
#include "CSSComputedStyleDeclaration.h"
#include "CSSCustomPropertyValue.h"
#include "CSSFontPaletteValuesOverrideColorsValue.h"
#include "CSSFontStyleRangeValue.h"
#include "CSSFontVariantLigaturesParser.h"
#include "CSSFontVariantNumericParser.h"
#include "CSSGridLineNamesValue.h"
#include "CSSGridTemplateAreasValue.h"
#include "CSSOffsetRotateValue.h"
#include "CSSParserFastPaths.h"
#include "CSSParserIdioms.h"
#include "CSSPendingSubstitutionValue.h"
#include "CSSPrimitiveValueMappings.h"
#include "CSSPropertyParserConsumer+Angle.h"
#include "CSSPropertyParserConsumer+Color.h"
#include "CSSPropertyParserConsumer+Integer.h"
#include "CSSPropertyParserConsumer+Length.h"
#include "CSSPropertyParserConsumer+List.h"
#include "CSSPropertyParserConsumer+Number.h"
#include "CSSPropertyParserConsumer+Percent.h"
#include "CSSPropertyParserConsumer+Resolution.h"
#include "CSSPropertyParserConsumer+Time.h"
#include "CSSPropertyParsing.h"
#include "CSSQuadValue.h"
#include "CSSTokenizer.h"
#include "CSSTransformListValue.h"
#include "CSSValuePair.h"
#include "CSSVariableParser.h"
#include "CSSVariableReferenceValue.h"
#include "FontFace.h"
#include "ParsingUtilities.h"
#include "Rect.h"
#include "StyleBuilder.h"
#include "StyleBuilderConverter.h"
#include "StylePropertyShorthand.h"
#include "StylePropertyShorthandFunctions.h"
#include "TimingFunction.h"
#include "TransformFunctions.h"
#include <memory>
#include <wtf/StdLibExtras.h>
#include <wtf/text/StringBuilder.h>
namespace WebCore {
bool isCustomPropertyName(StringView propertyName)
{
return propertyName.length() > 2 && propertyName.characterAt(0) == '-' && propertyName.characterAt(1) == '-';
}
static bool hasPrefix(std::span<const char> string, std::span<const LChar> prefix)
{
if (string.size() < prefix.size())
return false;
return equalSpans(string.first(prefix.size()), prefix);
}
template<typename CharacterType> static CSSPropertyID cssPropertyID(std::span<const CharacterType> characters)
{
char buffer[maxCSSPropertyNameLength];
for (size_t i = 0; i != characters.size(); ++i) {
auto character = characters[i];
if (!character || !isASCII(character))
return CSSPropertyInvalid;
buffer[i] = toASCIILower(character);
}
return findCSSProperty(buffer, characters.size());
}
// FIXME: Remove this mechanism entirely once we can do it without breaking the web.
static bool isAppleLegacyCSSValueKeyword(std::span<const char> characters)
{
return hasPrefix(characters.subspan(1), "apple-"_span)
&& !hasPrefix(characters.subspan(7), "system"_span)
&& !hasPrefix(characters.subspan(7), "pay"_span)
&& !hasPrefix(characters.subspan(7), "wireless"_span);
}
template<typename CharacterType> static CSSValueID cssValueKeywordID(std::span<const CharacterType> characters)
{
ASSERT(!characters.empty()); // Otherwise buffer[0] would access uninitialized memory below.
std::array<char, maxCSSValueKeywordLength + 1> buffer; // 1 to turn "apple" into "webkit"
for (unsigned i = 0; i != characters.size(); ++i) {
auto character = characters[i];
if (!character || !isASCII(character))
return CSSValueInvalid;
buffer[i] = toASCIILower(character);
}
// In most cases, if the prefix is -apple-, change it to -webkit-. This makes the string one character longer.
auto length = characters.size();
if (buffer[0] == '-' && isAppleLegacyCSSValueKeyword(std::span { buffer }.first(length))) {
memmove(buffer.data() + 7, buffer.data() + 6, length - 6);
memcpy(buffer.data() + 1, "webkit", 6);
++length;
}
return findCSSValueKeyword(std::span { buffer }.first(length));
}
CSSValueID cssValueKeywordID(StringView string)
{
unsigned length = string.length();
if (!length)
return CSSValueInvalid;
if (length > maxCSSValueKeywordLength)
return CSSValueInvalid;
return string.is8Bit() ? cssValueKeywordID(string.span8()) : cssValueKeywordID(string.span16());
}
CSSPropertyID cssPropertyID(StringView string)
{
unsigned length = string.length();
if (!length)
return CSSPropertyInvalid;
if (length > maxCSSPropertyNameLength)
return CSSPropertyInvalid;
return string.is8Bit() ? cssPropertyID(string.span8()) : cssPropertyID(string.span16());
}
using namespace CSSPropertyParserHelpers;
using namespace CSSPropertyParserHelpersWorkerSafe;
CSSPropertyParser::CSSPropertyParser(const CSSParserTokenRange& range, const CSSParserContext& context, Vector<CSSProperty, 256>* parsedProperties, bool consumeWhitespace)
: m_range(range)
, m_context(context)
, m_parsedProperties(parsedProperties)
{
if (consumeWhitespace)
m_range.consumeWhitespace();
}
void CSSPropertyParser::addProperty(CSSPropertyID property, CSSPropertyID currentShorthand, RefPtr<CSSValue>&& value, bool important, bool implicit)
{
int shorthandIndex = 0;
bool setFromShorthand = false;
if (currentShorthand) {
auto shorthands = matchingShorthandsForLonghand(property);
setFromShorthand = true;
if (shorthands.size() > 1)
shorthandIndex = indexOfShorthandForLonghand(currentShorthand, shorthands);
}
// Allow anything to be set from a shorthand (e.g. the CSS all property always sets everything,
// regardless of whether the longhands are enabled), and allow internal properties as we use
// them to handle certain DOM-exposed values (e.g. -webkit-font-size-delta from
// execCommand('FontSizeDelta')).
ASSERT(isExposed(property, &m_context.propertySettings) || setFromShorthand || isInternal(property));
if (value && !value->isImplicitInitialValue())
m_parsedProperties->append(CSSProperty(property, WTFMove(value), important, setFromShorthand, shorthandIndex, implicit));
else {
ASSERT(setFromShorthand);
m_parsedProperties->append(CSSProperty(property, Ref { CSSPrimitiveValue::implicitInitialValue() }, important, setFromShorthand, shorthandIndex, true));
}
}
void CSSPropertyParser::addExpandedProperty(CSSPropertyID shorthand, RefPtr<CSSValue>&& value, bool important, bool implicit)
{
for (auto longhand : shorthandForProperty(shorthand))
addProperty(longhand, shorthand, value.copyRef(), important, implicit);
}
bool CSSPropertyParser::parseValue(CSSPropertyID propertyID, bool important, const CSSParserTokenRange& range, const CSSParserContext& context, ParsedPropertyVector& parsedProperties, StyleRuleType ruleType)
{
int parsedPropertiesSize = parsedProperties.size();
CSSPropertyParser parser(range, context, &parsedProperties);
bool parseSuccess;
if (ruleType == StyleRuleType::FontFace)
parseSuccess = parser.parseFontFaceDescriptor(propertyID);
else if (ruleType == StyleRuleType::FontPaletteValues)
parseSuccess = parser.parseFontPaletteValuesDescriptor(propertyID);
else if (ruleType == StyleRuleType::CounterStyle)
parseSuccess = parser.parseCounterStyleDescriptor(propertyID);
else if (ruleType == StyleRuleType::Keyframe)
parseSuccess = parser.parseKeyframeDescriptor(propertyID, important);
else if (ruleType == StyleRuleType::Property)
parseSuccess = parser.parsePropertyDescriptor(propertyID);
else
parseSuccess = parser.parseValueStart(propertyID, important);
if (!parseSuccess)
parsedProperties.shrink(parsedPropertiesSize);
return parseSuccess;
}
static RefPtr<CSSPrimitiveValue> maybeConsumeCSSWideKeyword(CSSParserTokenRange& range)
{
CSSParserTokenRange rangeCopy = range;
CSSValueID valueID = rangeCopy.consumeIncludingWhitespace().id();
if (!rangeCopy.atEnd())
return nullptr;
if (!isCSSWideKeyword(valueID))
return nullptr;
range = rangeCopy;
return CSSPrimitiveValue::create(valueID);
}
RefPtr<CSSValue> CSSPropertyParser::parseSingleValue(CSSPropertyID property, const CSSParserTokenRange& range, const CSSParserContext& context)
{
CSSPropertyParser parser(range, context, nullptr);
if (RefPtr value = maybeConsumeCSSWideKeyword(parser.m_range))
return value;
RefPtr value = parser.parseSingleValue(property);
if (!value || !parser.m_range.atEnd())
return nullptr;
return value;
}
RefPtr<CSSCustomPropertyValue> CSSPropertyParser::parseTypedCustomPropertyValue(const AtomString& name, const CSSCustomPropertySyntax& syntax, const CSSParserTokenRange& tokens, Style::BuilderState& builderState, const CSSParserContext& context)
{
CSSPropertyParser parser(tokens, context, nullptr, false);
RefPtr value = parser.parseTypedCustomPropertyValue(name, syntax, builderState);
if (!value || !parser.m_range.atEnd())
return nullptr;
return value;
}
RefPtr<CSSCustomPropertyValue> CSSPropertyParser::parseTypedCustomPropertyInitialValue(const AtomString& name, const CSSCustomPropertySyntax& syntax, CSSParserTokenRange tokens, Style::BuilderState& builderState, const CSSParserContext& context)
{
if (syntax.isUniversal())
return CSSVariableParser::parseInitialValueForUniversalSyntax(name, tokens);
CSSPropertyParser parser(tokens, context, nullptr, false);
RefPtr value = parser.parseTypedCustomPropertyValue(name, syntax, builderState);
if (!value || !parser.m_range.atEnd())
return nullptr;
if (value->containsCSSWideKeyword())
return nullptr;
return value;
}
ComputedStyleDependencies CSSPropertyParser::collectParsedCustomPropertyValueDependencies(const CSSCustomPropertySyntax& syntax, const CSSParserTokenRange& tokens, const CSSParserContext& context)
{
CSSPropertyParser parser(tokens, context, nullptr);
return parser.collectParsedCustomPropertyValueDependencies(syntax);
}
bool CSSPropertyParser::isValidCustomPropertyValueForSyntax(const CSSCustomPropertySyntax& syntax, CSSParserTokenRange tokens, const CSSParserContext& context)
{
if (syntax.isUniversal())
return true;
CSSPropertyParser parser { tokens, context, nullptr };
return !!parser.consumeCustomPropertyValueWithSyntax(syntax).first;
}
bool CSSPropertyParser::parseValueStart(CSSPropertyID propertyID, bool important)
{
if (consumeCSSWideKeyword(propertyID, important))
return true;
CSSParserTokenRange originalRange = m_range;
bool isShorthand = WebCore::isShorthand(propertyID);
if (isShorthand) {
// Variable references will fail to parse here and will fall out to the variable ref parser below.
if (parseShorthand(propertyID, important))
return true;
} else {
RefPtr parsedValue = parseSingleValue(propertyID);
if (parsedValue && m_range.atEnd()) {
addProperty(propertyID, CSSPropertyInvalid, WTFMove(parsedValue), important);
return true;
}
}
if (CSSVariableParser::containsValidVariableReferences(originalRange, m_context)) {
Ref variable = CSSVariableReferenceValue::create(originalRange, m_context);
if (isShorthand)
addExpandedProperty(propertyID, CSSPendingSubstitutionValue::create(propertyID, WTFMove(variable)), important);
else
addProperty(propertyID, CSSPropertyInvalid, WTFMove(variable), important);
return true;
}
return false;
}
bool CSSPropertyParser::consumeCSSWideKeyword(CSSPropertyID propertyID, bool important)
{
CSSParserTokenRange rangeCopy = m_range;
RefPtr value = maybeConsumeCSSWideKeyword(rangeCopy);
if (!value)
return false;
const StylePropertyShorthand& shorthand = shorthandForProperty(propertyID);
if (!shorthand.length()) {
if (CSSProperty::isDescriptorOnly(propertyID))
return false;
addProperty(propertyID, CSSPropertyInvalid, value.releaseNonNull(), important);
} else
addExpandedProperty(propertyID, value.releaseNonNull(), important);
m_range = rangeCopy;
return true;
}
RefPtr<CSSValue> CSSPropertyParser::parseSingleValue(CSSPropertyID property, CSSPropertyID currentShorthand)
{
return CSSPropertyParsing::parseStyleProperty(m_range, property, currentShorthand, m_context);
}
std::pair<RefPtr<CSSValue>, CSSCustomPropertySyntax::Type> CSSPropertyParser::consumeCustomPropertyValueWithSyntax(const CSSCustomPropertySyntax& syntax)
{
ASSERT(!syntax.isUniversal());
auto rangeCopy = m_range;
auto consumeSingleValue = [&](auto& range, auto& component) -> RefPtr<CSSValue> {
switch (component.type) {
case CSSCustomPropertySyntax::Type::Length:
return consumeLength(range, m_context.mode);
case CSSCustomPropertySyntax::Type::LengthPercentage:
return consumeLengthOrPercent(range, m_context.mode);
case CSSCustomPropertySyntax::Type::CustomIdent:
if (RefPtr value = consumeCustomIdent(range)) {
if (component.ident.isNull() || value->stringValue() == component.ident)
return value;
}
return nullptr;
case CSSCustomPropertySyntax::Type::Percentage:
return consumePercent(range);
case CSSCustomPropertySyntax::Type::Integer:
return consumeInteger(range);
case CSSCustomPropertySyntax::Type::Number:
return consumeNumber(range);
case CSSCustomPropertySyntax::Type::Angle:
return consumeAngle(range, m_context.mode);
case CSSCustomPropertySyntax::Type::Time:
return consumeTime(range, m_context.mode);
case CSSCustomPropertySyntax::Type::Resolution:
return consumeResolution(range);
case CSSCustomPropertySyntax::Type::Color:
return consumeColor(range, m_context);
case CSSCustomPropertySyntax::Type::Image:
return consumeImage(range, m_context, { AllowedImageType::URLFunction, AllowedImageType::GeneratedImage });
case CSSCustomPropertySyntax::Type::URL:
return consumeURL(range);
case CSSCustomPropertySyntax::Type::TransformFunction:
return consumeTransformFunction(m_range, m_context);
case CSSCustomPropertySyntax::Type::TransformList:
return consumeTransform(m_range, m_context);
case CSSCustomPropertySyntax::Type::Unknown:
return nullptr;
}
ASSERT_NOT_REACHED();
return nullptr;
};
auto consumeComponent = [&](auto& range, const auto& component) -> RefPtr<CSSValue> {
switch (component.multiplier) {
case CSSCustomPropertySyntax::Multiplier::Single:
return consumeSingleValue(range, component);
case CSSCustomPropertySyntax::Multiplier::CommaList: {
return consumeCommaSeparatedListWithoutSingleValueOptimization(range, [&](auto& range) {
return consumeSingleValue(range, component);
});
}
case CSSCustomPropertySyntax::Multiplier::SpaceList: {
CSSValueListBuilder valueList;
while (RefPtr value = consumeSingleValue(range, component))
valueList.append(value.releaseNonNull());
if (valueList.isEmpty())
return nullptr;
return CSSValueList::createSpaceSeparated(WTFMove(valueList));
}
}
ASSERT_NOT_REACHED();
return nullptr;
};
for (auto& component : syntax.definition) {
if (RefPtr value = consumeComponent(m_range, component)) {
if (m_range.atEnd())
return { value, component.type };
}
m_range = rangeCopy;
}
return { nullptr, CSSCustomPropertySyntax::Type::Unknown };
}
ComputedStyleDependencies CSSPropertyParser::collectParsedCustomPropertyValueDependencies(const CSSCustomPropertySyntax& syntax)
{
if (syntax.isUniversal())
return { };
m_range.consumeWhitespace();
auto [value, syntaxType] = consumeCustomPropertyValueWithSyntax(syntax);
if (!value)
return { };
return value->computedStyleDependencies();
}
RefPtr<CSSCustomPropertyValue> CSSPropertyParser::parseTypedCustomPropertyValue(const AtomString& name, const CSSCustomPropertySyntax& syntax, Style::BuilderState& builderState)
{
if (syntax.isUniversal())
return CSSCustomPropertyValue::createSyntaxAll(name, CSSVariableData::create(m_range.consumeAll()));
m_range.consumeWhitespace();
if (RefPtr value = maybeConsumeCSSWideKeyword(m_range))
return CSSCustomPropertyValue::createWithID(name, value->valueID());
auto [value, syntaxType] = consumeCustomPropertyValueWithSyntax(syntax);
if (!value)
return nullptr;
auto resolveSyntaxValue = [&, syntaxType = syntaxType](const CSSValue& value) -> std::optional<CSSCustomPropertyValue::SyntaxValue> {
switch (syntaxType) {
case CSSCustomPropertySyntax::Type::LengthPercentage:
case CSSCustomPropertySyntax::Type::Length: {
auto length = Style::BuilderConverter::convertLength(builderState, downcast<CSSPrimitiveValue>(value));
return { WTFMove(length) };
}
case CSSCustomPropertySyntax::Type::Percentage:
case CSSCustomPropertySyntax::Type::Integer:
case CSSCustomPropertySyntax::Type::Number:
case CSSCustomPropertySyntax::Type::Angle:
case CSSCustomPropertySyntax::Type::Time:
case CSSCustomPropertySyntax::Type::Resolution: {
auto canonicalUnit = canonicalUnitTypeForUnitType(downcast<CSSPrimitiveValue>(value).primitiveType());
auto doubleValue = downcast<CSSPrimitiveValue>(value).doubleValue(canonicalUnit);
return { CSSCustomPropertyValue::NumericSyntaxValue { doubleValue, canonicalUnit } };
}
case CSSCustomPropertySyntax::Type::Color: {
auto color = builderState.colorFromPrimitiveValue(downcast<CSSPrimitiveValue>(value), Style::ForVisitedLink::No);
return { color };
}
case CSSCustomPropertySyntax::Type::Image: {
auto styleImage = builderState.createStyleImage(value);
if (!styleImage)
return { };
return { WTFMove(styleImage) };
}
case CSSCustomPropertySyntax::Type::URL: {
auto url = m_context.completeURL(downcast<CSSPrimitiveValue>(value).stringValue());
return { url.resolvedURL };
}
case CSSCustomPropertySyntax::Type::CustomIdent:
return { downcast<CSSPrimitiveValue>(value).stringValue() };
case CSSCustomPropertySyntax::Type::TransformFunction:
case CSSCustomPropertySyntax::Type::TransformList:
if (auto transform = transformForValue(value, builderState.cssToLengthConversionData()))
return { CSSCustomPropertyValue::TransformSyntaxValue { transform } };
return { };
case CSSCustomPropertySyntax::Type::Unknown:
return { };
}
ASSERT_NOT_REACHED();
return { };
};
if (is<CSSValueList>(value.get()) || is<CSSTransformListValue>(value.get())) {
Ref valueList = downcast<CSSValueContainingVector>(value.releaseNonNull());
auto syntaxValueList = CSSCustomPropertyValue::SyntaxValueList { { }, valueList->separator() };
for (Ref listValue : valueList.get()) {
auto syntaxValue = resolveSyntaxValue(listValue);
if (!syntaxValue)
return nullptr;
syntaxValueList.values.append(WTFMove(*syntaxValue));
}
return CSSCustomPropertyValue::createForSyntaxValueList(name, WTFMove(syntaxValueList));
};
auto syntaxValue = resolveSyntaxValue(*value);
if (!syntaxValue)
return nullptr;
return CSSCustomPropertyValue::createForSyntaxValue(name, WTFMove(*syntaxValue));
}
RefPtr<CSSValue> CSSPropertyParser::parseCounterStyleDescriptor(CSSPropertyID property, CSSParserTokenRange& range, const CSSParserContext& context)
{
ASSERT(context.propertySettings.cssCounterStyleAtRulesEnabled);
return CSSPropertyParsing::parseCounterStyleDescriptor(range, property, context);
}
bool CSSPropertyParser::parseCounterStyleDescriptor(CSSPropertyID property)
{
ASSERT(m_context.propertySettings.cssCounterStyleAtRulesEnabled);
RefPtr parsedValue = CSSPropertyParsing::parseCounterStyleDescriptor(m_range, property, m_context);
if (!parsedValue || !m_range.atEnd())
return false;
addProperty(property, CSSPropertyInvalid, WTFMove(parsedValue), false);
return true;
}
bool CSSPropertyParser::parseFontFaceDescriptor(CSSPropertyID property)
{
if (isShorthand(property))
return parseFontFaceDescriptorShorthand(property);
RefPtr parsedValue = CSSPropertyParsing::parseFontFaceDescriptor(m_range, property, m_context);
if (!parsedValue || !m_range.atEnd())
return false;
addProperty(property, CSSPropertyInvalid, WTFMove(parsedValue), false);
return true;
}
bool CSSPropertyParser::parseFontFaceDescriptorShorthand(CSSPropertyID property)
{
ASSERT(isExposed(property, m_context.propertySettings));
switch (property) {
case CSSPropertyFontVariant:
return consumeFontVariantShorthand(false);
default:
return false;
}
}
bool CSSPropertyParser::parseKeyframeDescriptor(CSSPropertyID propertyID, bool important)
{
// https://www.w3.org/TR/css-animations-1/#keyframes
// The <declaration-list> inside of <keyframe-block> accepts any CSS property except those
// defined in this specification, but does accept the animation-timing-function property and
// interprets it specially.
switch (propertyID) {
case CSSPropertyAnimation:
case CSSPropertyAnimationDelay:
case CSSPropertyAnimationDirection:
case CSSPropertyAnimationDuration:
case CSSPropertyAnimationFillMode:
case CSSPropertyAnimationIterationCount:
case CSSPropertyAnimationName:
case CSSPropertyAnimationPlayState:
return false;
default:
return parseValueStart(propertyID, important);
}
}
bool CSSPropertyParser::parsePropertyDescriptor(CSSPropertyID property)
{
RefPtr parsedValue = CSSPropertyParsing::parsePropertyDescriptor(m_range, property, m_context);
if (!parsedValue || !m_range.atEnd())
return false;
addProperty(property, CSSPropertyInvalid, WTFMove(parsedValue), false);
return true;
}
bool CSSPropertyParser::parseFontPaletteValuesDescriptor(CSSPropertyID property)
{
RefPtr parsedValue = CSSPropertyParsing::parseFontPaletteValuesDescriptor(m_range, property, m_context);
if (!parsedValue || !m_range.atEnd())
return false;
addProperty(property, CSSPropertyInvalid, WTFMove(parsedValue), false);
return true;
}
bool CSSPropertyParser::consumeFont(bool important)
{
if (CSSPropertyParserHelpers::isSystemFontShorthand(m_range.peek().id())) {
auto systemFont = m_range.consumeIncludingWhitespace().id();
if (!m_range.atEnd())
return false;
// We can't store properties (weight, size, etc.) of the system font here,
// since those values can change (e.g. accessibility font sizes, or accessibility bold).
// Parsing (correctly) doesn't re-run in response to updateStyleAfterChangeInEnvironment().
// Instead, we store sentinel values, later replaced by environment-sensitive values
// inside Style::BuilderCustom and Style::BuilderConverter.
for (auto property : fontShorthand())
addProperty(property, CSSPropertyFont, CSSPrimitiveValue::create(systemFont), important, true);
return true;
}
auto range = m_range;
RefPtr<CSSValue> values[7];
auto& fontStyle = values[0];
auto& fontVariantCaps = values[1];
auto& fontWeight = values[2];
auto& fontStretch = values[3];
auto& fontSize = values[4];
auto& lineHeight = values[5];
auto& fontFamily = values[6];
// Optional font-style, font-variant, font-stretch and font-weight, in any order.
for (unsigned i = 0; i < 4 && !range.atEnd(); ++i) {
if (consumeIdent<CSSValueNormal>(range))
continue;
if (!fontStyle && (fontStyle = consumeFontStyle(range, m_context.mode)))
continue;
if (!fontVariantCaps && (fontVariantCaps = consumeIdent<CSSValueSmallCaps>(range)))
continue;
if (!fontWeight && (fontWeight = consumeFontWeight(range)))
continue;
if (!fontStretch && (fontStretch = consumeFontStretchKeywordValue(range)))
continue;
break;
}
if (range.atEnd())
return false;
fontSize = CSSPropertyParsing::consumeFontSize(range, m_context);
if (!fontSize || range.atEnd())
return false;
if (consumeSlashIncludingWhitespace(range)) {
if (!consumeIdent<CSSValueNormal>(range)) {
lineHeight = CSSPropertyParsing::consumeLineHeight(range, m_context);
if (!lineHeight)
return false;
}
if (range.atEnd())
return false;
}
fontFamily = consumeFontFamily(range);
if (!fontFamily || !range.atEnd())
return false;
m_range = range;
auto shorthand = fontShorthand();
for (unsigned i = 0; i < shorthand.length(); ++i)
addProperty(shorthand.properties()[i], CSSPropertyFont, i < std::size(values) ? WTFMove(values[i]) : nullptr, important, true);
return true;
}
bool CSSPropertyParser::consumeTextDecorationSkip(bool important)
{
if (RefPtr skip = consumeIdent<CSSValueNone, CSSValueAuto, CSSValueInk>(m_range)) {
switch (skip->valueID()) {
case CSSValueNone:
addProperty(CSSPropertyTextDecorationSkipInk, CSSPropertyTextDecorationSkip, skip.releaseNonNull(), important);
return m_range.atEnd();
case CSSValueAuto:
addProperty(CSSPropertyTextDecorationSkipInk, CSSPropertyTextDecorationSkip, skip.releaseNonNull(), important);
return m_range.atEnd();
case CSSValueInk:
addProperty(CSSPropertyTextDecorationSkipInk, CSSPropertyTextDecorationSkip, CSSPrimitiveValue::create(CSSValueAuto), important);
return m_range.atEnd();
default:
ASSERT_NOT_REACHED();
return false;
}
}
return false;
}
bool CSSPropertyParser::consumeFontVariantShorthand(bool important)
{
if (identMatches<CSSValueNormal, CSSValueNone>(m_range.peek().id())) {
addProperty(CSSPropertyFontVariantLigatures, CSSPropertyFontVariant, consumeIdent(m_range), important);
addProperty(CSSPropertyFontVariantCaps, CSSPropertyFontVariant, nullptr, important);
addProperty(CSSPropertyFontVariantAlternates, CSSPropertyFontVariant, nullptr, important);
addProperty(CSSPropertyFontVariantNumeric, CSSPropertyFontVariant, nullptr, important);
addProperty(CSSPropertyFontVariantEastAsian, CSSPropertyFontVariant, nullptr, important);
addProperty(CSSPropertyFontVariantPosition, CSSPropertyFontVariant, nullptr, important);
addProperty(CSSPropertyFontVariantEmoji, CSSPropertyFontVariant, nullptr, important);
return m_range.atEnd();
}
RefPtr<CSSValue> capsValue;
RefPtr<CSSValue> alternatesValue;
RefPtr<CSSValue> positionValue;
RefPtr<CSSValue> eastAsianValue;
RefPtr<CSSValue> emojiValue;
CSSFontVariantLigaturesParser ligaturesParser;
CSSFontVariantNumericParser numericParser;
bool implicitLigatures = true;
bool implicitNumeric = true;
do {
if (!capsValue && (capsValue = CSSPropertyParsing::consumeFontVariantCaps(m_range)))
continue;
if (!positionValue && (positionValue = CSSPropertyParsing::consumeFontVariantPosition(m_range)))
continue;
if (!alternatesValue && (alternatesValue = consumeFontVariantAlternates(m_range)))
continue;
CSSFontVariantLigaturesParser::ParseResult ligaturesParseResult = ligaturesParser.consumeLigature(m_range);
CSSFontVariantNumericParser::ParseResult numericParseResult = numericParser.consumeNumeric(m_range);
if (ligaturesParseResult == CSSFontVariantLigaturesParser::ParseResult::ConsumedValue) {
implicitLigatures = false;
continue;
}
if (numericParseResult == CSSFontVariantNumericParser::ParseResult::ConsumedValue) {
implicitNumeric = false;
continue;
}
if (ligaturesParseResult == CSSFontVariantLigaturesParser::ParseResult::DisallowedValue
|| numericParseResult == CSSFontVariantNumericParser::ParseResult::DisallowedValue)
return false;
if (!eastAsianValue && (eastAsianValue = consumeFontVariantEastAsian(m_range)))
continue;
if (m_context.propertySettings.cssFontVariantEmojiEnabled && !emojiValue && (emojiValue = CSSPropertyParsing::consumeFontVariantEmoji(m_range)))
continue;
// Saw some value that didn't match anything else.
return false;
} while (!m_range.atEnd());
addProperty(CSSPropertyFontVariantLigatures, CSSPropertyFontVariant, ligaturesParser.finalizeValue().releaseNonNull(), important, implicitLigatures);
addProperty(CSSPropertyFontVariantCaps, CSSPropertyFontVariant, WTFMove(capsValue), important);
addProperty(CSSPropertyFontVariantAlternates, CSSPropertyFontVariant, WTFMove(alternatesValue), important);
addProperty(CSSPropertyFontVariantNumeric, CSSPropertyFontVariant, numericParser.finalizeValue().releaseNonNull(), important, implicitNumeric);
addProperty(CSSPropertyFontVariantEastAsian, CSSPropertyFontVariant, WTFMove(eastAsianValue), important);
addProperty(CSSPropertyFontVariantPosition, CSSPropertyFontVariant, WTFMove(positionValue), important);
addProperty(CSSPropertyFontVariantEmoji, CSSPropertyFontVariant, WTFMove(emojiValue), important);
return true;
}
bool CSSPropertyParser::consumeFontSynthesis(bool important)
{
// none | [ weight || style || small-caps ]
if (m_range.peek().id() == CSSValueNone) {
addProperty(CSSPropertyFontSynthesisSmallCaps, CSSPropertyFontSynthesis, consumeIdent(m_range).releaseNonNull(), important);
addProperty(CSSPropertyFontSynthesisStyle, CSSPropertyFontSynthesis, CSSPrimitiveValue::create(CSSValueNone), important);
addProperty(CSSPropertyFontSynthesisWeight, CSSPropertyFontSynthesis, CSSPrimitiveValue::create(CSSValueNone), important);
return m_range.atEnd();
}
bool foundWeight = false;
bool foundStyle = false;
bool foundSmallCaps = false;
auto checkAndMarkExistence = [](bool* found) {
if (*found)
return false;
return *found = true;
};
while (!m_range.atEnd()) {
RefPtr ident = consumeIdent<CSSValueWeight, CSSValueStyle, CSSValueSmallCaps>(m_range);
if (!ident)
return false;
switch (ident->valueID()) {
case CSSValueWeight:
if (!checkAndMarkExistence(&foundWeight))
return false;
break;
case CSSValueStyle:
if (!checkAndMarkExistence(&foundStyle))
return false;
break;
case CSSValueSmallCaps:
if (!checkAndMarkExistence(&foundSmallCaps))
return false;
break;
default:
ASSERT_NOT_REACHED();
return false;
}
}
addProperty(CSSPropertyFontSynthesisWeight, CSSPropertyFontSynthesis, CSSPrimitiveValue::create(foundWeight ? CSSValueAuto : CSSValueNone), important);
addProperty(CSSPropertyFontSynthesisStyle, CSSPropertyFontSynthesis, CSSPrimitiveValue::create(foundStyle ? CSSValueAuto : CSSValueNone), important);
addProperty(CSSPropertyFontSynthesisSmallCaps, CSSPropertyFontSynthesis, CSSPrimitiveValue::create(foundSmallCaps ? CSSValueAuto : CSSValueNone), important);
return true;
}
bool CSSPropertyParser::consumeBorderSpacing(bool important)
{
RefPtr horizontalSpacing = consumeLength(m_range, m_context.mode, ValueRange::NonNegative, UnitlessQuirk::Allow);
if (!horizontalSpacing)
return false;
RefPtr verticalSpacing = horizontalSpacing;
if (!m_range.atEnd())
verticalSpacing = consumeLength(m_range, m_context.mode, ValueRange::NonNegative, UnitlessQuirk::Allow);
if (!verticalSpacing || !m_range.atEnd())
return false;
addProperty(CSSPropertyWebkitBorderHorizontalSpacing, CSSPropertyBorderSpacing, horizontalSpacing.releaseNonNull(), important);
addProperty(CSSPropertyWebkitBorderVerticalSpacing, CSSPropertyBorderSpacing, verticalSpacing.releaseNonNull(), important);
return true;
}
bool CSSPropertyParser::consumeColumns(bool important)
{
RefPtr<CSSValue> columnWidth;
RefPtr<CSSValue> columnCount;
for (unsigned propertiesParsed = 0; propertiesParsed < 2 && !m_range.atEnd(); ++propertiesParsed) {
if (m_range.peek().id() == CSSValueAuto) {
// 'auto' is a valid value for any of the two longhands, and at this point
// we don't know which one(s) it is meant for. We need to see if there are other values first.
consumeIdent(m_range);
} else {
if (!columnWidth && (columnWidth = CSSPropertyParsing::consumeColumnWidth(m_range)))
continue;
if (!columnCount && (columnCount = CSSPropertyParsing::consumeColumnCount(m_range)))
continue;
// If we didn't find at least one match, this is an invalid shorthand and we have to ignore it.
return false;
}
}
if (!m_range.atEnd())
return false;
addProperty(CSSPropertyColumnWidth, CSSPropertyColumns, WTFMove(columnWidth), important);
addProperty(CSSPropertyColumnCount, CSSPropertyColumns, WTFMove(columnCount), important);
return true;
}
struct InitialNumericValue {
double number;
CSSUnitType type { CSSUnitType::CSS_NUMBER };
};
using InitialValue = std::variant<CSSValueID, InitialNumericValue>;
static constexpr InitialValue initialValueForLonghand(CSSPropertyID longhand)
{
// Currently, this tries to cover just longhands that can be omitted from shorthands when parsing or serializing.
// Later, we likely want to cover all properties, and generate the table from CSSProperties.json.
switch (longhand) {
case CSSPropertyAccentColor:
case CSSPropertyAlignSelf:
case CSSPropertyAspectRatio:
case CSSPropertyBackgroundSize:
case CSSPropertyBlockSize:
case CSSPropertyBottom:
case CSSPropertyBreakAfter:
case CSSPropertyBreakBefore:
case CSSPropertyBreakInside:
case CSSPropertyCaretColor:
case CSSPropertyClip:
case CSSPropertyColumnCount:
case CSSPropertyColumnWidth:
case CSSPropertyCursor:
case CSSPropertyDominantBaseline:
case CSSPropertyFlexBasis:
case CSSPropertyFontKerning:
case CSSPropertyFontSynthesisSmallCaps:
case CSSPropertyFontSynthesisStyle:
case CSSPropertyFontSynthesisWeight:
case CSSPropertyGridAutoColumns:
case CSSPropertyGridAutoRows:
case CSSPropertyGridColumnEnd:
case CSSPropertyGridColumnStart:
case CSSPropertyGridRowEnd:
case CSSPropertyGridRowStart:
case CSSPropertyHeight:
case CSSPropertyImageRendering:
case CSSPropertyInlineSize:
case CSSPropertyInputSecurity:
case CSSPropertyInsetBlockEnd:
case CSSPropertyInsetBlockStart:
case CSSPropertyInsetInlineEnd:
case CSSPropertyInsetInlineStart:
case CSSPropertyJustifySelf:
case CSSPropertyLeft:
case CSSPropertyLineBreak:
case CSSPropertyMaskBorderWidth:
case CSSPropertyMaskSize:
case CSSPropertyOffsetAnchor:
case CSSPropertyOffsetRotate:
case CSSPropertyOverflowAnchor:
case CSSPropertyOverscrollBehaviorBlock:
case CSSPropertyOverscrollBehaviorInline:
case CSSPropertyOverscrollBehaviorX:
case CSSPropertyOverscrollBehaviorY:
case CSSPropertyPage:
case CSSPropertyPointerEvents:
case CSSPropertyQuotes:
case CSSPropertyRight:
case CSSPropertyScrollBehavior:
case CSSPropertyScrollPaddingBlockEnd:
case CSSPropertyScrollPaddingBlockStart:
case CSSPropertyScrollPaddingBottom:
case CSSPropertyScrollPaddingInlineEnd:
case CSSPropertyScrollPaddingInlineStart:
case CSSPropertyScrollPaddingLeft:
case CSSPropertyScrollPaddingRight:
case CSSPropertyScrollPaddingTop:
case CSSPropertyScrollbarColor:
case CSSPropertyScrollbarGutter:
case CSSPropertyScrollbarWidth:
case CSSPropertySize:
case CSSPropertyTableLayout:
case CSSPropertyTextAlignLast:
case CSSPropertyTextDecorationSkipInk:
case CSSPropertyTextDecorationThickness:
case CSSPropertyTextJustify:
case CSSPropertyTextUnderlineOffset:
case CSSPropertyTextUnderlinePosition:
case CSSPropertyTop:
case CSSPropertyWebkitMaskSourceType:
case CSSPropertyWillChange:
case CSSPropertyZIndex:
case CSSPropertyZoom:
#if ENABLE(VARIATION_FONTS)
case CSSPropertyFontOpticalSizing:
#endif
return CSSValueAuto;
case CSSPropertyAlignContent:
case CSSPropertyAlignItems:
case CSSPropertyAnimationDirection:
case CSSPropertyBackgroundBlendMode:
case CSSPropertyColumnGap:
case CSSPropertyContainerType:
case CSSPropertyContent:
case CSSPropertyFontFeatureSettings:
case CSSPropertyFontPalette:
case CSSPropertyFontStretch:
case CSSPropertyFontStyle:
case CSSPropertyFontVariantAlternates:
case CSSPropertyFontVariantCaps:
case CSSPropertyFontVariantEastAsian:
case CSSPropertyFontVariantEmoji:
case CSSPropertyFontVariantLigatures:
case CSSPropertyFontVariantNumeric:
case CSSPropertyFontVariantPosition:
case CSSPropertyFontWeight:
case CSSPropertyJustifyContent:
case CSSPropertyLetterSpacing:
case CSSPropertyLineHeight:
case CSSPropertyOffsetPosition:
case CSSPropertyOverflowWrap:
case CSSPropertyRowGap:
case CSSPropertyScrollSnapStop:
case CSSPropertySpeakAs:
case CSSPropertyTextBoxTrim:
case CSSPropertyTransitionBehavior:
case CSSPropertyWordBreak:
case CSSPropertyWordSpacing:
#if ENABLE(VARIATION_FONTS)
case CSSPropertyFontVariationSettings:
#endif
return CSSValueNormal;
case CSSPropertyAlignmentBaseline:
case CSSPropertyVerticalAlign:
return CSSValueBaseline;
case CSSPropertyAnimationDelay:
case CSSPropertyAnimationDuration:
case CSSPropertyTransitionDelay:
case CSSPropertyTransitionDuration:
return InitialNumericValue { 0, CSSUnitType::CSS_S };
case CSSPropertyAnimationFillMode:
case CSSPropertyAnimationName:
case CSSPropertyAnimationTimeline:
case CSSPropertyAppearance:
case CSSPropertyBackgroundImage:
case CSSPropertyBorderBlockEndStyle:
case CSSPropertyBorderBlockStartStyle:
case CSSPropertyBorderBlockStyle: