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CSSPropertyParser.cpp
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6616 lines (5854 loc) · 257 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 "CSSBasicShapes.h"
#include "CSSBorderImage.h"
#include "CSSBorderImageSliceValue.h"
#include "CSSBorderImageWidthValue.h"
#include "CSSComputedStyleDeclaration.h"
#include "CSSContentDistributionValue.h"
#include "CSSCursorImageValue.h"
#include "CSSCustomPropertyValue.h"
#include "CSSFontFaceSrcValue.h"
#include "CSSFontFeatureValue.h"
#include "CSSFontPaletteValuesOverrideColorsValue.h"
#if ENABLE(VARIATION_FONTS)
#include "CSSFontVariationValue.h"
#endif
#include "CSSFontStyleRangeValue.h"
#include "CSSFontStyleValue.h"
#include "CSSFunctionValue.h"
#include "CSSGridAutoRepeatValue.h"
#include "CSSGridIntegerRepeatValue.h"
#include "CSSGridLineNamesValue.h"
#include "CSSGridTemplateAreasValue.h"
#include "CSSLineBoxContainValue.h"
#include "CSSOffsetRotateValue.h"
#include "CSSParserFastPaths.h"
#include "CSSParserIdioms.h"
#include "CSSPendingSubstitutionValue.h"
#include "CSSPrimitiveValueMappings.h"
#include "CSSRayValue.h"
#include "CSSReflectValue.h"
#include "CSSShadowValue.h"
#include "CSSSubgridValue.h"
#include "CSSTimingFunctionValue.h"
#include "CSSUnicodeRangeValue.h"
#include "CSSVariableParser.h"
#include "CSSVariableReferenceValue.h"
#include "Counter.h"
#include "FontFace.h"
#include "HashTools.h"
// FIXME-NEWPARSER: CSSPrimitiveValue is a large class that holds many unrelated objects,
// switching behavior on the type of the object it is holding.
// Since CSSValue is already a class hierarchy, this adds an unnecessary second level to the hierarchy that complicates code.
// So we need to remove the various behaviors from CSSPrimitiveValue and split them into separate subclasses of CSSValue.
// FIXME-NEWPARSER: Replace Pair and Rect with actual CSSValue subclasses (CSSValuePair and CSSQuadValue).
#include "Pair.h"
#include "Rect.h"
#include "RenderTheme.h"
#include "SVGPathByteStream.h"
#include "SVGPathUtilities.h"
#include "StyleBuilder.h"
#include "StyleBuilderConverter.h"
#include "StylePropertyShorthand.h"
#include "StylePropertyShorthandFunctions.h"
#include "TimingFunction.h"
#include <bitset>
#include <memory>
#include <wtf/text/StringBuilder.h>
namespace WebCore {
bool isCustomPropertyName(const String& propertyName)
{
return propertyName.length() > 2 && propertyName.characterAt(0) == '-' && propertyName.characterAt(1) == '-';
}
static bool hasPrefix(const char* string, unsigned length, const char* prefix)
{
for (unsigned i = 0; i < length; ++i) {
if (!prefix[i])
return true;
if (string[i] != prefix[i])
return false;
}
return false;
}
template <typename CharacterType>
static CSSPropertyID cssPropertyID(const CharacterType* propertyName, unsigned length)
{
char buffer[maxCSSPropertyNameLength + 1 + 1]; // 1 to turn "apple"/"khtml" into "webkit", 1 for null character
for (unsigned i = 0; i != length; ++i) {
CharacterType c = propertyName[i];
if (!c || c >= 0x7F)
return CSSPropertyInvalid; // illegal character
buffer[i] = toASCIILower(c);
}
buffer[length] = '\0';
if (auto hashTableEntry = findProperty(buffer, length))
return static_cast<CSSPropertyID>(hashTableEntry->id);
return CSSPropertyInvalid;
}
static bool isAppleLegacyCssValueKeyword(const char* valueKeyword, unsigned length)
{
static const char applePrefix[] = "-apple-";
static const char appleSystemPrefix[] = "-apple-system";
static const char applePayPrefix[] = "-apple-pay";
#if PLATFORM(COCOA)
static const char* appleWirelessPlaybackTargetActive = getValueName(CSSValueAppleWirelessPlaybackTargetActive);
#endif
return hasPrefix(valueKeyword, length, applePrefix)
&& !hasPrefix(valueKeyword, length, appleSystemPrefix)
&& !hasPrefix(valueKeyword, length, applePayPrefix)
#if PLATFORM(COCOA)
&& !equal(reinterpret_cast<const LChar*>(valueKeyword), reinterpret_cast<const LChar*>(appleWirelessPlaybackTargetActive), length)
#endif
;
}
template <typename CharacterType>
static CSSValueID cssValueKeywordID(const CharacterType* valueKeyword, unsigned length)
{
char buffer[maxCSSValueKeywordLength + 1 + 1]; // 1 to turn "apple"/"khtml" into "webkit", 1 for null character
for (unsigned i = 0; i != length; ++i) {
CharacterType c = valueKeyword[i];
if (!c || c >= 0x7F)
return CSSValueInvalid; // illegal keyword.
buffer[i] = toASCIILower(c);
}
buffer[length] = '\0';
if (buffer[0] == '-') {
// If the prefix is -apple- or -khtml-, change it to -webkit-.
// This makes the string one character longer.
// On iOS we don't want to change values starting with -apple-system to -webkit-system.
// FIXME: Remove this mangling without breaking the web.
if (isAppleLegacyCssValueKeyword(buffer, length)) {
memmove(buffer + 7, buffer + 6, length + 1 - 6);
memcpy(buffer, "-webkit", 7);
++length;
}
}
const Value* hashTableEntry = findValue(buffer, length);
return hashTableEntry ? static_cast<CSSValueID>(hashTableEntry->id) : CSSValueInvalid;
}
CSSValueID cssValueKeywordID(StringView string)
{
unsigned length = string.length();
if (!length)
return CSSValueInvalid;
if (length > maxCSSValueKeywordLength)
return CSSValueInvalid;
return string.is8Bit() ? cssValueKeywordID(string.characters8(), length) : cssValueKeywordID(string.characters16(), length);
}
CSSPropertyID cssPropertyID(StringView string)
{
unsigned length = string.length();
if (!length)
return CSSPropertyInvalid;
if (length > maxCSSPropertyNameLength)
return CSSPropertyInvalid;
return string.is8Bit() ? cssPropertyID(string.characters8(), length) : cssPropertyID(string.characters16(), length);
}
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, Ref<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(isCSSPropertyExposed(property, &m_context.propertySettings) || setFromShorthand || isInternalCSSProperty(property));
m_parsedProperties->append(CSSProperty(property, WTFMove(value), important, setFromShorthand, shorthandIndex, implicit));
}
void CSSPropertyParser::addPropertyWithImplicitDefault(CSSPropertyID property, CSSPropertyID currentShorthand, RefPtr<CSSValue>&& value, Ref<CSSValue>&& implicitDefault, bool important)
{
if (value)
addProperty(property, currentShorthand, value.releaseNonNull(), important, false);
else
addProperty(property, currentShorthand, WTFMove(implicitDefault), important, true);
}
void CSSPropertyParser::addExpandedPropertyForValue(CSSPropertyID property, Ref<CSSValue>&& value, bool important)
{
for (auto longhand : shorthandForProperty(property))
addProperty(longhand, property, value.copyRef(), important);
}
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, context);
else
parseSuccess = parser.parseValueStart(propertyID, important);
if (!parseSuccess)
parsedProperties.shrink(parsedPropertiesSize);
return parseSuccess;
}
static RefPtr<CSSValue> maybeConsumeCSSWideKeyword(CSSParserTokenRange& range)
{
CSSParserTokenRange rangeCopy = range;
CSSValueID valueID = rangeCopy.consumeIncludingWhitespace().id();
if (!rangeCopy.atEnd())
return nullptr;
if (!isCSSWideKeyword(valueID))
return nullptr;
range = rangeCopy;
return CSSValuePool::singleton().createIdentifierValue(valueID);
}
RefPtr<CSSValue> CSSPropertyParser::parseSingleValue(CSSPropertyID property, const CSSParserTokenRange& range, const CSSParserContext& context)
{
CSSPropertyParser parser(range, context, nullptr);
if (auto value = maybeConsumeCSSWideKeyword(parser.m_range))
return value;
RefPtr<CSSValue> value = parser.parseSingleValue(property);
if (!value || !parser.m_range.atEnd())
return nullptr;
return value;
}
bool CSSPropertyParser::canParseTypedCustomPropertyValue(const String& syntax, const CSSParserTokenRange& tokens, const CSSParserContext& context)
{
CSSPropertyParser parser(tokens, context, nullptr);
return parser.canParseTypedCustomPropertyValue(syntax);
}
RefPtr<CSSCustomPropertyValue> CSSPropertyParser::parseTypedCustomPropertyValue(const AtomString& name, const String& syntax, const CSSParserTokenRange& tokens, const Style::BuilderState& builderState, const CSSParserContext& context)
{
CSSPropertyParser parser(tokens, context, nullptr, false);
RefPtr<CSSCustomPropertyValue> value = parser.parseTypedCustomPropertyValue(name, syntax, builderState);
if (!value || !parser.m_range.atEnd())
return nullptr;
return value;
}
void CSSPropertyParser::collectParsedCustomPropertyValueDependencies(const String& syntax, bool isRoot, HashSet<CSSPropertyID>& dependencies, const CSSParserTokenRange& tokens, const CSSParserContext& context)
{
CSSPropertyParser parser(tokens, context, nullptr);
parser.collectParsedCustomPropertyValueDependencies(syntax, isRoot, dependencies);
}
bool CSSPropertyParser::parseValueStart(CSSPropertyID propertyID, bool important)
{
if (consumeCSSWideKeyword(propertyID, important))
return true;
CSSParserTokenRange originalRange = m_range;
bool isShorthand = isShorthandCSSProperty(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<CSSValue> parsedValue = parseSingleValue(propertyID);
if (parsedValue && m_range.atEnd()) {
addProperty(propertyID, CSSPropertyInvalid, *parsedValue, important);
return true;
}
}
if (CSSVariableParser::containsValidVariableReferences(originalRange, m_context)) {
auto variable = CSSVariableReferenceValue::create(originalRange, m_context);
if (isShorthand)
addExpandedPropertyForValue(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;
auto 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
addExpandedPropertyForValue(propertyID, value.releaseNonNull(), important);
m_range = rangeCopy;
return true;
}
bool CSSPropertyParser::consumeTransformOrigin(bool important)
{
if (auto resultXY = consumeOneOrTwoValuedPositionCoordinates(m_range, m_context.mode, UnitlessQuirk::Forbid)) {
m_range.consumeWhitespace();
bool atEnd = m_range.atEnd();
auto resultZ = consumeLength(m_range, m_context.mode, ValueRange::All);
if ((!resultZ && !atEnd) || !m_range.atEnd())
return false;
addProperty(CSSPropertyTransformOriginX, CSSPropertyTransformOrigin, WTFMove(resultXY->x), important);
addProperty(CSSPropertyTransformOriginY, CSSPropertyTransformOrigin, WTFMove(resultXY->y), important);
addPropertyWithImplicitDefault(CSSPropertyTransformOriginZ, CSSPropertyTransformOrigin, resultZ, CSSValuePool::singleton().createValue(0, CSSUnitType::CSS_PX), important);
return true;
}
return false;
}
bool CSSPropertyParser::consumePerspectiveOrigin(bool important)
{
if (auto result = consumePositionCoordinates(m_range, m_context.mode, UnitlessQuirk::Forbid, PositionSyntax::Position)) {
addProperty(CSSPropertyPerspectiveOriginX, CSSPropertyPerspectiveOrigin, WTFMove(result->x), important);
addProperty(CSSPropertyPerspectiveOriginY, CSSPropertyPerspectiveOrigin, WTFMove(result->y), important);
return true;
}
return false;
}
// Methods for consuming non-shorthand properties starts here.
static RefPtr<CSSValue> consumeDisplay(CSSParserTokenRange& range)
{
// Parse single keyword values
auto singleKeyword = consumeIdent<
// <display-box>
CSSValueContents,
CSSValueNone,
// <display-internal>
CSSValueTableCaption,
CSSValueTableCell,
CSSValueTableColumnGroup,
CSSValueTableColumn,
CSSValueTableHeaderGroup,
CSSValueTableFooterGroup,
CSSValueTableRow,
CSSValueTableRowGroup,
// <display-legacy>
CSSValueInlineBlock,
CSSValueInlineFlex,
CSSValueInlineGrid,
CSSValueInlineTable,
// Prefixed values
CSSValueWebkitInlineBox,
CSSValueWebkitBox,
// No layout support for the full <display-listitem> syntax, so treat it as <display-legacy>
CSSValueListItem
>(range);
if (singleKeyword)
return singleKeyword;
// Empty value, stop parsing
if (range.atEnd())
return nullptr;
// Convert -webkit-flex/-webkit-inline-flex to flex/inline-flex
CSSValueID nextValueID = range.peek().id();
if (nextValueID == CSSValueWebkitInlineFlex || nextValueID == CSSValueWebkitFlex) {
consumeIdent(range);
return CSSValuePool::singleton().createValue(
nextValueID == CSSValueWebkitInlineFlex ? CSSValueInlineFlex : CSSValueFlex);
}
// Parse [ <display-outside> || <display-inside> ]
std::optional<CSSValueID> parsedDisplayOutside;
std::optional<CSSValueID> parsedDisplayInside;
while (!range.atEnd()) {
auto nextValueID = range.peek().id();
switch (nextValueID) {
// <display-outside>
case CSSValueBlock:
case CSSValueInline:
if (parsedDisplayOutside)
return nullptr;
parsedDisplayOutside = nextValueID;
break;
// <display-inside>
case CSSValueFlex:
case CSSValueFlow:
case CSSValueFlowRoot:
case CSSValueGrid:
case CSSValueTable:
if (parsedDisplayInside)
return nullptr;
parsedDisplayInside = nextValueID;
break;
default:
return nullptr;
}
consumeIdent(range);
}
// Set defaults when one of the two values are unspecified
CSSValueID displayOutside = parsedDisplayOutside.value_or(CSSValueBlock);
CSSValueID displayInside = parsedDisplayInside.value_or(CSSValueFlow);
auto selectShortValue = [&]() -> CSSValueID {
if (displayOutside == CSSValueBlock) {
// Alias display: flow to display: block
return displayInside == CSSValueFlow ? CSSValueBlock : displayInside;
}
// Convert `display: inline <display-inside>` to the equivalent short value
switch (displayInside) {
case CSSValueFlex:
return CSSValueInlineFlex;
case CSSValueFlow:
return CSSValueInline;
case CSSValueFlowRoot:
return CSSValueInlineBlock;
case CSSValueGrid:
return CSSValueInlineGrid;
case CSSValueTable:
return CSSValueInlineTable;
default:
ASSERT_NOT_REACHED();
return CSSValueInline;
}
};
return CSSValuePool::singleton().createValue(selectShortValue());
}
static RefPtr<CSSValue> consumeWillChange(CSSParserTokenRange& range, const CSSParserContext& context)
{
if (range.peek().id() == CSSValueAuto)
return consumeIdent(range);
RefPtr<CSSValueList> values = CSSValueList::createCommaSeparated();
// Every comma-separated list of identifiers is a valid will-change value,
// unless the list includes an explicitly disallowed identifier.
while (!range.atEnd()) {
switch (range.peek().id()) {
case CSSValueContents:
case CSSValueScrollPosition:
values->append(consumeIdent(range).releaseNonNull());
break;
case CSSValueNone:
case CSSValueAll:
case CSSValueAuto:
return nullptr;
default:
if (range.peek().type() != IdentToken)
return nullptr;
CSSPropertyID propertyID = cssPropertyID(range.peek().value());
if (propertyID == CSSPropertyWillChange)
return nullptr;
if (!isCSSPropertyExposed(propertyID, &context.propertySettings))
propertyID = CSSPropertyInvalid;
if (propertyID != CSSPropertyInvalid) {
values->append(CSSValuePool::singleton().createIdentifierValue(propertyID));
range.consumeIncludingWhitespace();
break;
}
if (auto customIdent = consumeCustomIdent(range)) {
// Append properties we don't recognize, but that are legal, as strings.
values->append(customIdent.releaseNonNull());
break;
}
return nullptr;
}
// This is a comma separated list
if (!range.atEnd() && !consumeCommaIncludingWhitespace(range))
return nullptr;
}
return values;
}
#if ENABLE(VARIATION_FONTS)
static RefPtr<CSSValue> consumeFontVariationTag(CSSParserTokenRange& range)
{
if (range.peek().type() != StringToken)
return nullptr;
auto string = range.consumeIncludingWhitespace().value();
FontTag tag;
if (string.length() != tag.size())
return nullptr;
for (unsigned i = 0; i < tag.size(); ++i) {
// Limits the range of characters to 0x20-0x7E, following the tag name rules defiend in the OpenType specification.
UChar character = string[i];
if (character < 0x20 || character > 0x7E)
return nullptr;
tag[i] = character;
}
if (range.atEnd())
return nullptr;
auto tagValue = consumeNumberRaw(range);
if (!tagValue)
return nullptr;
return CSSFontVariationValue::create(tag, tagValue->value);
}
static RefPtr<CSSValue> consumeFontVariationSettings(CSSParserTokenRange& range)
{
if (range.peek().id() == CSSValueNormal)
return consumeIdent(range);
auto settings = CSSValueList::createCommaSeparated();
do {
RefPtr<CSSValue> variationValue = consumeFontVariationTag(range);
if (!variationValue)
return nullptr;
settings->append(variationValue.releaseNonNull());
} while (consumeCommaIncludingWhitespace(range));
if (!settings->length())
return nullptr;
return settings;
}
#endif // ENABLE(VARIATION_FONTS)
static RefPtr<CSSValue> consumePage(CSSParserTokenRange& range)
{
if (range.peek().id() == CSSValueAuto)
return consumeIdent(range);
return consumeCustomIdent(range);
}
static RefPtr<CSSValue> consumeQuotes(CSSParserTokenRange& range)
{
auto id = range.peek().id();
if (id == CSSValueNone || id == CSSValueAuto)
return consumeIdent(range);
RefPtr<CSSValueList> values = CSSValueList::createSpaceSeparated();
while (!range.atEnd()) {
RefPtr<CSSPrimitiveValue> parsedValue = consumeString(range);
if (!parsedValue)
return nullptr;
values->append(parsedValue.releaseNonNull());
}
if (values->length() && values->length() % 2 == 0)
return values;
return nullptr;
}
class FontVariantLigaturesParser {
public:
FontVariantLigaturesParser()
: m_sawCommonLigaturesValue(false)
, m_sawDiscretionaryLigaturesValue(false)
, m_sawHistoricalLigaturesValue(false)
, m_sawContextualLigaturesValue(false)
, m_result(CSSValueList::createSpaceSeparated())
{
}
enum class ParseResult {
ConsumedValue,
DisallowedValue,
UnknownValue
};
ParseResult consumeLigature(CSSParserTokenRange& range)
{
CSSValueID valueID = range.peek().id();
switch (valueID) {
case CSSValueNoCommonLigatures:
case CSSValueCommonLigatures:
if (m_sawCommonLigaturesValue)
return ParseResult::DisallowedValue;
m_sawCommonLigaturesValue = true;
break;
case CSSValueNoDiscretionaryLigatures:
case CSSValueDiscretionaryLigatures:
if (m_sawDiscretionaryLigaturesValue)
return ParseResult::DisallowedValue;
m_sawDiscretionaryLigaturesValue = true;
break;
case CSSValueNoHistoricalLigatures:
case CSSValueHistoricalLigatures:
if (m_sawHistoricalLigaturesValue)
return ParseResult::DisallowedValue;
m_sawHistoricalLigaturesValue = true;
break;
case CSSValueNoContextual:
case CSSValueContextual:
if (m_sawContextualLigaturesValue)
return ParseResult::DisallowedValue;
m_sawContextualLigaturesValue = true;
break;
default:
return ParseResult::UnknownValue;
}
m_result->append(consumeIdent(range).releaseNonNull());
return ParseResult::ConsumedValue;
}
RefPtr<CSSValue> finalizeValue()
{
if (!m_result->length())
return CSSValuePool::singleton().createIdentifierValue(CSSValueNormal);
return WTFMove(m_result);
}
private:
bool m_sawCommonLigaturesValue;
bool m_sawDiscretionaryLigaturesValue;
bool m_sawHistoricalLigaturesValue;
bool m_sawContextualLigaturesValue;
RefPtr<CSSValueList> m_result;
};
static RefPtr<CSSValue> consumeFontVariantLigatures(CSSParserTokenRange& range)
{
if (range.peek().id() == CSSValueNormal || range.peek().id() == CSSValueNone)
return consumeIdent(range);
FontVariantLigaturesParser ligaturesParser;
do {
if (ligaturesParser.consumeLigature(range) !=
FontVariantLigaturesParser::ParseResult::ConsumedValue)
return nullptr;
} while (!range.atEnd());
return ligaturesParser.finalizeValue();
}
static RefPtr<CSSValue> consumeFontVariantEastAsian(CSSParserTokenRange& range)
{
if (range.peek().id() == CSSValueNormal)
return consumeIdent(range);
RefPtr<CSSValueList> values = CSSValueList::createSpaceSeparated();
std::optional<FontVariantEastAsianVariant> variant;
std::optional<FontVariantEastAsianWidth> width;
std::optional<FontVariantEastAsianRuby> ruby;
while (!range.atEnd()) {
if (range.peek().type() != IdentToken)
return nullptr;
auto id = range.peek().id();
switch (id) {
case CSSValueJis78:
if (variant)
return nullptr;
variant = FontVariantEastAsianVariant::Jis78;
break;
case CSSValueJis83:
if (variant)
return nullptr;
variant = FontVariantEastAsianVariant::Jis83;
break;
case CSSValueJis90:
if (variant)
return nullptr;
variant = FontVariantEastAsianVariant::Jis90;
break;
case CSSValueJis04:
if (variant)
return nullptr;
variant = FontVariantEastAsianVariant::Jis04;
break;
case CSSValueSimplified:
if (variant)
return nullptr;
variant = FontVariantEastAsianVariant::Simplified;
break;
case CSSValueTraditional:
if (variant)
return nullptr;
variant = FontVariantEastAsianVariant::Traditional;
break;
case CSSValueFullWidth:
if (width)
return nullptr;
width = FontVariantEastAsianWidth::Full;
break;
case CSSValueProportionalWidth:
if (width)
return nullptr;
width = FontVariantEastAsianWidth::Proportional;
break;
case CSSValueRuby:
if (ruby)
return nullptr;
ruby = FontVariantEastAsianRuby::Yes;
break;
default:
return nullptr;
}
range.consumeIncludingWhitespace();
}
switch (variant.value_or(FontVariantEastAsianVariant::Normal)) {
case FontVariantEastAsianVariant::Normal:
break;
case FontVariantEastAsianVariant::Jis78:
values->append(CSSValuePool::singleton().createIdentifierValue(CSSValueJis78));
break;
case FontVariantEastAsianVariant::Jis83:
values->append(CSSValuePool::singleton().createIdentifierValue(CSSValueJis83));
break;
case FontVariantEastAsianVariant::Jis90:
values->append(CSSValuePool::singleton().createIdentifierValue(CSSValueJis90));
break;
case FontVariantEastAsianVariant::Jis04:
values->append(CSSValuePool::singleton().createIdentifierValue(CSSValueJis04));
break;
case FontVariantEastAsianVariant::Simplified:
values->append(CSSValuePool::singleton().createIdentifierValue(CSSValueSimplified));
break;
case FontVariantEastAsianVariant::Traditional:
values->append(CSSValuePool::singleton().createIdentifierValue(CSSValueTraditional));
break;
}
switch (width.value_or(FontVariantEastAsianWidth::Normal)) {
case FontVariantEastAsianWidth::Normal:
break;
case FontVariantEastAsianWidth::Full:
values->append(CSSValuePool::singleton().createIdentifierValue(CSSValueFullWidth));
break;
case FontVariantEastAsianWidth::Proportional:
values->append(CSSValuePool::singleton().createIdentifierValue(CSSValueProportionalWidth));
break;
}
switch (ruby.value_or(FontVariantEastAsianRuby::Normal)) {
case FontVariantEastAsianRuby::Normal:
break;
case FontVariantEastAsianRuby::Yes:
values->append(CSSValuePool::singleton().createIdentifierValue(CSSValueRuby));
}
if (!values->length())
return nullptr;
return values;
}
static RefPtr<CSSPrimitiveValue> consumeFontVariantCaps(CSSParserTokenRange& range)
{
return consumeIdent<CSSValueNormal, CSSValueSmallCaps, CSSValueAllSmallCaps,
CSSValuePetiteCaps, CSSValueAllPetiteCaps,
CSSValueUnicase, CSSValueTitlingCaps>(range);
}
static RefPtr<CSSPrimitiveValue> consumeFontVariantAlternates(CSSParserTokenRange& range)
{
return consumeIdent<CSSValueNormal, CSSValueHistoricalForms>(range);
}
static RefPtr<CSSPrimitiveValue> consumeFontVariantPosition(CSSParserTokenRange& range)
{
return consumeIdent<CSSValueNormal, CSSValueSub, CSSValueSuper>(range);
}
class FontVariantNumericParser {
public:
FontVariantNumericParser()
: m_sawNumericFigureValue(false)
, m_sawNumericSpacingValue(false)
, m_sawNumericFractionValue(false)
, m_sawOrdinalValue(false)
, m_sawSlashedZeroValue(false)
, m_result(CSSValueList::createSpaceSeparated())
{
}
enum class ParseResult {
ConsumedValue,
DisallowedValue,
UnknownValue
};
ParseResult consumeNumeric(CSSParserTokenRange& range)
{
CSSValueID valueID = range.peek().id();
switch (valueID) {
case CSSValueLiningNums:
case CSSValueOldstyleNums:
if (m_sawNumericFigureValue)
return ParseResult::DisallowedValue;
m_sawNumericFigureValue = true;
break;
case CSSValueProportionalNums:
case CSSValueTabularNums:
if (m_sawNumericSpacingValue)
return ParseResult::DisallowedValue;
m_sawNumericSpacingValue = true;
break;
case CSSValueDiagonalFractions:
case CSSValueStackedFractions:
if (m_sawNumericFractionValue)
return ParseResult::DisallowedValue;
m_sawNumericFractionValue = true;
break;
case CSSValueOrdinal:
if (m_sawOrdinalValue)
return ParseResult::DisallowedValue;
m_sawOrdinalValue = true;
break;
case CSSValueSlashedZero:
if (m_sawSlashedZeroValue)
return ParseResult::DisallowedValue;
m_sawSlashedZeroValue = true;
break;
default:
return ParseResult::UnknownValue;
}
m_result->append(consumeIdent(range).releaseNonNull());
return ParseResult::ConsumedValue;
}
RefPtr<CSSValue> finalizeValue()
{
if (!m_result->length())
return CSSValuePool::singleton().createIdentifierValue(CSSValueNormal);
return WTFMove(m_result);
}
private:
bool m_sawNumericFigureValue;
bool m_sawNumericSpacingValue;
bool m_sawNumericFractionValue;
bool m_sawOrdinalValue;
bool m_sawSlashedZeroValue;
RefPtr<CSSValueList> m_result;
};
static RefPtr<CSSValue> consumeFontVariantNumeric(CSSParserTokenRange& range)
{
if (range.peek().id() == CSSValueNormal)
return consumeIdent(range);
FontVariantNumericParser numericParser;
do {
if (numericParser.consumeNumeric(range) !=
FontVariantNumericParser::ParseResult::ConsumedValue)
return nullptr;
} while (!range.atEnd());
return numericParser.finalizeValue();
}
static RefPtr<CSSPrimitiveValue> consumeFontVariantCSS21(CSSParserTokenRange& range)
{
return consumeIdent<CSSValueNormal, CSSValueSmallCaps>(range);
}
static RefPtr<CSSPrimitiveValue> consumeFontWeight(CSSParserTokenRange& range)
{
if (auto result = consumeFontWeightRaw(range)) {
return WTF::switchOn(*result, [] (CSSValueID valueID) {
return CSSValuePool::singleton().createIdentifierValue(valueID);
}, [] (double weightNumber) {
return CSSValuePool::singleton().createValue(weightNumber, CSSUnitType::CSS_NUMBER);
});
}
return nullptr;
}
static RefPtr<CSSPrimitiveValue> consumeFontPalette(CSSParserTokenRange& range)
{
if (auto result = consumeIdent<CSSValueNormal, CSSValueLight, CSSValueDark>(range))
return result;
return consumeDashedIdent(range);
}
static RefPtr<CSSValue> consumeFamilyName(CSSParserTokenRange& range)
{
auto familyName = consumeFamilyNameRaw(range);
if (familyName.isNull())
return nullptr;
return CSSValuePool::singleton().createFontFamilyValue(familyName);
}
static RefPtr<CSSValue> consumeGenericFamily(CSSParserTokenRange& range)
{
return consumeIdentRange(range, CSSValueSerif, CSSValueWebkitBody);
}
static RefPtr<CSSValueList> consumeFontFamily(CSSParserTokenRange& range)
{
RefPtr<CSSValueList> list = CSSValueList::createCommaSeparated();
do {
if (auto parsedValue = consumeGenericFamily(range))
list->append(parsedValue.releaseNonNull());
else {
if (auto parsedValue = consumeFamilyName(range))
list->append(parsedValue.releaseNonNull());
else
return nullptr;
}
} while (consumeCommaIncludingWhitespace(range));
return list;
}
static RefPtr<CSSValueList> consumeFontFamilyDescriptor(CSSParserTokenRange& range)
{
// FIXME-NEWPARSER: https://bugs.webkit.org/show_bug.cgi?id=196381 For compatibility with the old parser, we have to make
// a list here, even though the list always contains only a single family name.
// Once the old parser is gone, we can delete this function, make the caller
// use consumeFamilyName instead, and then patch the @font-face code to
// not expect a list with a single name in it.
RefPtr<CSSValueList> list = CSSValueList::createCommaSeparated();
RefPtr<CSSValue> parsedValue = consumeFamilyName(range);
if (parsedValue)
list->append(parsedValue.releaseNonNull());
if (!range.atEnd() || !list->length())
return nullptr;
return list;
}
static RefPtr<CSSValue> consumeFontSynthesis(CSSParserTokenRange& range)
{
// none | [ weight || style || small-caps ]
CSSValueID id = range.peek().id();
if (id == CSSValueNone)
return consumeIdent(range);
bool foundWeight = false;
bool foundStyle = false;
bool foundSmallCaps = false;