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dart / external / github.com / flutter / engine / refs/tags/demo_apk_24 / . / sky / engine / core / css / parser / CSSPropertyParser.cpp
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/*
* Copyright (C) 2003 Lars Knoll (knoll@kde.org)
* Copyright (C) 2005 Allan Sandfeld Jensen (kde@carewolf.com)
* Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012 Apple Inc. All rights reserved.
* Copyright (C) 2007 Nicholas Shanks <webkit@nickshanks.com>
* Copyright (C) 2008 Eric Seidel <eric@webkit.org>
* Copyright (C) 2009 Torch Mobile Inc. All rights reserved. (http://www.torchmobile.com/)
* Copyright (C) 2012 Adobe Systems Incorporated. All rights reserved.
* Copyright (C) 2012 Intel Corporation. All rights reserved.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public License
* along with this library; see the file COPYING.LIB. If not, write to
* the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
* Boston, MA 02110-1301, USA.
*/
#include "sky/engine/core/css/parser/CSSPropertyParser.h"
// FIXME: Way too many!
#include <limits.h>
#include "gen/sky/core/CSSValueKeywords.h"
#include "gen/sky/core/StylePropertyShorthand.h"
#include "gen/sky/platform/RuntimeEnabledFeatures.h"
#include "sky/engine/core/css/CSSAspectRatioValue.h"
#include "sky/engine/core/css/CSSBasicShapes.h"
#include "sky/engine/core/css/CSSFontFeatureValue.h"
#include "sky/engine/core/css/CSSFunctionValue.h"
#include "sky/engine/core/css/CSSGradientValue.h"
#include "sky/engine/core/css/CSSInheritedValue.h"
#include "sky/engine/core/css/CSSInitialValue.h"
#include "sky/engine/core/css/CSSLineBoxContainValue.h"
#include "sky/engine/core/css/CSSPrimitiveValue.h"
#include "sky/engine/core/css/CSSPropertyMetadata.h"
#include "sky/engine/core/css/CSSPropertySourceData.h"
#include "sky/engine/core/css/CSSSelector.h"
#include "sky/engine/core/css/CSSShadowValue.h"
#include "sky/engine/core/css/CSSTransformValue.h"
#include "sky/engine/core/css/CSSUnicodeRangeValue.h"
#include "sky/engine/core/css/CSSValueList.h"
#include "sky/engine/core/css/CSSValuePool.h"
#include "sky/engine/core/css/HashTools.h"
#include "sky/engine/core/css/Pair.h"
#include "sky/engine/core/css/parser/BisonCSSParser.h"
#include "sky/engine/core/css/parser/CSSParserIdioms.h"
#include "sky/engine/core/css/parser/CSSParserValues.h"
#include "sky/engine/core/html/parser/HTMLParserIdioms.h"
#include "sky/engine/platform/FloatConversion.h"
#include "sky/engine/wtf/BitArray.h"
#include "sky/engine/wtf/HexNumber.h"
#include "sky/engine/wtf/text/StringBuffer.h"
#include "sky/engine/wtf/text/StringBuilder.h"
#include "sky/engine/wtf/text/StringImpl.h"
#include "sky/engine/wtf/text/TextEncoding.h"
namespace blink {
static const double MAX_SCALE = 1000000;
template <unsigned N>
static bool equalIgnoringCase(const CSSParserString& a, const char (&b)[N])
{
unsigned length = N - 1; // Ignore the trailing null character
if (a.length() != length)
return false;
return a.is8Bit() ? WTF::equalIgnoringCase(b, a.characters8(), length) : WTF::equalIgnoringCase(b, a.characters16(), length);
}
template <unsigned N>
static bool equalIgnoringCase(CSSParserValue* value, const char (&b)[N])
{
ASSERT(value->unit == CSSPrimitiveValue::CSS_IDENT || value->unit == CSSPrimitiveValue::CSS_STRING);
return equalIgnoringCase(value->string, b);
}
static PassRefPtr<CSSPrimitiveValue> createPrimitiveValuePair(PassRefPtr<CSSPrimitiveValue> first, PassRefPtr<CSSPrimitiveValue> second, Pair::IdenticalValuesPolicy identicalValuesPolicy = Pair::DropIdenticalValues)
{
return cssValuePool().createValue(Pair::create(first, second, identicalValuesPolicy));
}
CSSPropertyParser::CSSPropertyParser(CSSParserValueList* valueList,
const CSSParserContext& context, bool inViewport,
Vector<CSSProperty, 256>& parsedProperties,
CSSRuleSourceData::Type ruleType)
: m_valueList(valueList)
, m_context(context)
, m_inViewport(inViewport)
, m_parsedProperties(parsedProperties)
, m_ruleType(ruleType)
, m_inParseShorthand(0)
, m_currentShorthand(CSSPropertyInvalid)
, m_implicitShorthand(false)
{
}
bool CSSPropertyParser::parseValue(CSSPropertyID property,
CSSParserValueList* valueList, const CSSParserContext& context, bool inViewport,
Vector<CSSProperty, 256>& parsedProperties, CSSRuleSourceData::Type ruleType)
{
CSSPropertyParser parser(valueList, context, inViewport, parsedProperties, ruleType);
return parser.parseValue(property);
}
void CSSPropertyParser::addProperty(CSSPropertyID propId, PassRefPtr<CSSValue> value, bool implicit)
{
int shorthandIndex = 0;
bool setFromShorthand = false;
if (m_currentShorthand) {
Vector<StylePropertyShorthand, 4> shorthands;
getMatchingShorthandsForLonghand(propId, &shorthands);
// Viewport descriptors have width and height as shorthands, but it doesn't
// make sense for CSSProperties.in to consider them as such. The shorthand
// index is only used by the inspector and doesn't affect viewport
// descriptors.
if (shorthands.isEmpty())
ASSERT(m_currentShorthand == CSSPropertyWidth || m_currentShorthand == CSSPropertyHeight);
else
setFromShorthand = true;
if (shorthands.size() > 1)
shorthandIndex = indexOfShorthandForLonghand(m_currentShorthand, shorthands);
}
m_parsedProperties.append(CSSProperty(propId, value, setFromShorthand, shorthandIndex, m_implicitShorthand || implicit));
}
void CSSPropertyParser::rollbackLastProperties(int num)
{
ASSERT(num >= 0);
ASSERT(m_parsedProperties.size() >= static_cast<unsigned>(num));
m_parsedProperties.shrink(m_parsedProperties.size() - num);
}
KURL CSSPropertyParser::completeURL(const String& url) const
{
return m_context.completeURL(url);
}
bool CSSPropertyParser::validCalculationUnit(CSSParserValue* value, Units unitflags, ReleaseParsedCalcValueCondition releaseCalc)
{
bool mustBeNonNegative = unitflags & (FNonNeg | FPositiveInteger);
if (!parseCalculation(value, mustBeNonNegative ? ValueRangeNonNegative : ValueRangeAll))
return false;
bool b = false;
switch (m_parsedCalculation->category()) {
case CalcLength:
b = (unitflags & FLength);
break;
case CalcNumber:
b = (unitflags & FNumber);
if (!b && (unitflags & (FInteger | FPositiveInteger)) && m_parsedCalculation->isInt())
b = true;
if (b && mustBeNonNegative && m_parsedCalculation->isNegative())
b = false;
// Always resolve calc() to a CSS_NUMBER in the CSSParserValue if there are no non-numbers specified in the unitflags.
if (b && !(unitflags & ~(FInteger | FNumber | FPositiveInteger | FNonNeg))) {
double number = m_parsedCalculation->doubleValue();
if ((unitflags & FPositiveInteger) && number <= 0) {
b = false;
} else {
delete value->function;
value->unit = CSSPrimitiveValue::CSS_NUMBER;
value->fValue = number;
value->isInt = m_parsedCalculation->isInt();
}
m_parsedCalculation.release();
return b;
}
break;
case CalcPercent:
b = (unitflags & FPercent);
if (b && mustBeNonNegative && m_parsedCalculation->isNegative())
b = false;
break;
case CalcPercentLength:
b = (unitflags & FPercent) && (unitflags & FLength);
break;
case CalcPercentNumber:
b = (unitflags & FPercent) && (unitflags & FNumber);
break;
case CalcAngle:
b = (unitflags & FAngle);
break;
case CalcTime:
b = (unitflags & FTime);
break;
case CalcFrequency:
b = (unitflags & FFrequency);
break;
case CalcOther:
break;
}
if (!b || releaseCalc == ReleaseParsedCalcValue)
m_parsedCalculation.release();
return b;
}
inline bool CSSPropertyParser::shouldAcceptUnitLessValues(CSSParserValue* value, Units unitflags, CSSParserMode cssParserMode)
{
// Quirks mode and presentation attributes accept unit less values.
return (unitflags & (FLength | FAngle | FTime)) && (!value->fValue || isUnitLessLengthParsingEnabledForMode(cssParserMode));
}
bool CSSPropertyParser::validUnit(CSSParserValue* value, Units unitflags, CSSParserMode cssParserMode, ReleaseParsedCalcValueCondition releaseCalc)
{
if (isCalculation(value))
return validCalculationUnit(value, unitflags, releaseCalc);
bool b = false;
switch (value->unit) {
case CSSPrimitiveValue::CSS_NUMBER:
b = (unitflags & FNumber);
if (!b && shouldAcceptUnitLessValues(value, unitflags, cssParserMode)) {
value->unit = (unitflags & FLength) ? CSSPrimitiveValue::CSS_PX :
((unitflags & FAngle) ? CSSPrimitiveValue::CSS_DEG : CSSPrimitiveValue::CSS_MS);
b = true;
}
if (!b && (unitflags & FInteger) && value->isInt)
b = true;
if (!b && (unitflags & FPositiveInteger) && value->isInt && value->fValue > 0)
b = true;
break;
case CSSPrimitiveValue::CSS_PERCENTAGE:
b = (unitflags & FPercent);
break;
case CSSPrimitiveValue::CSS_EMS:
case CSSPrimitiveValue::CSS_CHS:
case CSSPrimitiveValue::CSS_EXS:
case CSSPrimitiveValue::CSS_PX:
case CSSPrimitiveValue::CSS_CM:
case CSSPrimitiveValue::CSS_MM:
case CSSPrimitiveValue::CSS_IN:
case CSSPrimitiveValue::CSS_PT:
case CSSPrimitiveValue::CSS_PC:
case CSSPrimitiveValue::CSS_VW:
case CSSPrimitiveValue::CSS_VH:
case CSSPrimitiveValue::CSS_VMIN:
case CSSPrimitiveValue::CSS_VMAX:
b = (unitflags & FLength);
break;
case CSSPrimitiveValue::CSS_MS:
case CSSPrimitiveValue::CSS_S:
b = (unitflags & FTime);
break;
case CSSPrimitiveValue::CSS_DEG:
case CSSPrimitiveValue::CSS_RAD:
case CSSPrimitiveValue::CSS_GRAD:
case CSSPrimitiveValue::CSS_TURN:
b = (unitflags & FAngle);
break;
case CSSPrimitiveValue::CSS_DPPX:
case CSSPrimitiveValue::CSS_DPI:
case CSSPrimitiveValue::CSS_DPCM:
b = (unitflags & FResolution);
break;
case CSSPrimitiveValue::CSS_HZ:
case CSSPrimitiveValue::CSS_KHZ:
case CSSPrimitiveValue::CSS_DIMENSION:
default:
break;
}
if (b && unitflags & FNonNeg && value->fValue < 0)
b = false;
return b;
}
PassRefPtr<CSSPrimitiveValue> CSSPropertyParser::createPrimitiveNumericValue(CSSParserValue* value)
{
if (m_parsedCalculation) {
ASSERT(isCalculation(value));
return CSSPrimitiveValue::create(m_parsedCalculation.release());
}
ASSERT((value->unit >= CSSPrimitiveValue::CSS_NUMBER && value->unit <= CSSPrimitiveValue::CSS_KHZ)
|| (value->unit >= CSSPrimitiveValue::CSS_TURN && value->unit <= CSSPrimitiveValue::CSS_CHS)
|| (value->unit >= CSSPrimitiveValue::CSS_VW && value->unit <= CSSPrimitiveValue::CSS_VMAX)
|| (value->unit >= CSSPrimitiveValue::CSS_DPPX && value->unit <= CSSPrimitiveValue::CSS_DPCM));
return cssValuePool().createValue(value->fValue, static_cast<CSSPrimitiveValue::UnitType>(value->unit));
}
inline PassRefPtr<CSSPrimitiveValue> CSSPropertyParser::createPrimitiveStringValue(CSSParserValue* value)
{
ASSERT(value->unit == CSSPrimitiveValue::CSS_STRING || value->unit == CSSPrimitiveValue::CSS_IDENT);
return cssValuePool().createValue(value->string, CSSPrimitiveValue::CSS_STRING);
}
static inline bool isComma(CSSParserValue* value)
{
return value && value->unit == CSSParserValue::Operator && value->iValue == ',';
}
static bool consumeComma(CSSParserValueList* valueList)
{
if (!isComma(valueList->current()))
return false;
valueList->next();
return true;
}
static inline bool isForwardSlashOperator(CSSParserValue* value)
{
ASSERT(value);
return value->unit == CSSParserValue::Operator && value->iValue == '/';
}
static bool isGeneratedImageValue(CSSParserValue* val)
{
if (val->unit != CSSParserValue::Function)
return false;
return equalIgnoringCase(val->function->name, "-webkit-gradient(")
|| equalIgnoringCase(val->function->name, "-webkit-linear-gradient(")
|| equalIgnoringCase(val->function->name, "linear-gradient(")
|| equalIgnoringCase(val->function->name, "-webkit-repeating-linear-gradient(")
|| equalIgnoringCase(val->function->name, "repeating-linear-gradient(")
|| equalIgnoringCase(val->function->name, "-webkit-radial-gradient(")
|| equalIgnoringCase(val->function->name, "radial-gradient(")
|| equalIgnoringCase(val->function->name, "-webkit-repeating-radial-gradient(")
|| equalIgnoringCase(val->function->name, "repeating-radial-gradient(")
|| equalIgnoringCase(val->function->name, "-webkit-canvas(")
|| equalIgnoringCase(val->function->name, "-webkit-cross-fade(");
}
bool CSSPropertyParser::validWidthOrHeight(CSSParserValue* value)
{
int id = value->id;
if (id == CSSValueIntrinsic || id == CSSValueMinIntrinsic || id == CSSValueWebkitMinContent || id == CSSValueWebkitMaxContent || id == CSSValueWebkitFillAvailable || id == CSSValueWebkitFitContent)
return true;
return !id && validUnit(value, FLength | FPercent | FNonNeg);
}
inline PassRefPtr<CSSPrimitiveValue> CSSPropertyParser::parseValidPrimitive(CSSValueID identifier, CSSParserValue* value)
{
if (identifier)
return cssValuePool().createIdentifierValue(identifier);
if (value->unit == CSSPrimitiveValue::CSS_STRING)
return createPrimitiveStringValue(value);
if (value->unit >= CSSPrimitiveValue::CSS_NUMBER && value->unit <= CSSPrimitiveValue::CSS_KHZ)
return createPrimitiveNumericValue(value);
if (value->unit >= CSSPrimitiveValue::CSS_TURN && value->unit <= CSSPrimitiveValue::CSS_CHS)
return createPrimitiveNumericValue(value);
if (value->unit >= CSSPrimitiveValue::CSS_VW && value->unit <= CSSPrimitiveValue::CSS_VMAX)
return createPrimitiveNumericValue(value);
if (value->unit >= CSSPrimitiveValue::CSS_DPPX && value->unit <= CSSPrimitiveValue::CSS_DPCM)
return createPrimitiveNumericValue(value);
if (isCalculation(value))
return CSSPrimitiveValue::create(m_parsedCalculation.release());
return nullptr;
}
void CSSPropertyParser::addExpandedPropertyForValue(CSSPropertyID propId, PassRefPtr<CSSValue> prpValue)
{
const StylePropertyShorthand& shorthand = shorthandForProperty(propId);
unsigned shorthandLength = shorthand.length();
if (!shorthandLength) {
addProperty(propId, prpValue);
return;
}
RefPtr<CSSValue> value = prpValue;
ShorthandScope scope(this, propId);
const CSSPropertyID* longhands = shorthand.properties();
for (unsigned i = 0; i < shorthandLength; ++i)
addProperty(longhands[i], value);
}
bool CSSPropertyParser::parseValue(CSSPropertyID propId)
{
if (!isInternalPropertyAndValueParsingEnabledForMode(m_context.mode()) && isInternalProperty(propId))
return false;
if (!m_valueList)
return false;
CSSParserValue* value = m_valueList->current();
if (!value)
return false;
if (inViewport()) {
// Allow @viewport rules from UA stylesheets even if the feature is disabled.
if (!RuntimeEnabledFeatures::cssViewportEnabled() && !isUASheetBehavior(m_context.mode()))
return false;
return parseViewportProperty(propId);
}
// Note: m_parsedCalculation is used to pass the calc value to validUnit and then cleared at the end of this function.
// FIXME: This is to avoid having to pass parsedCalc to all validUnit callers.
ASSERT(!m_parsedCalculation);
CSSValueID id = value->id;
int num = inShorthand() ? 1 : m_valueList->size();
if (id == CSSValueInherit) {
if (num != 1)
return false;
addExpandedPropertyForValue(propId, cssValuePool().createInheritedValue());
return true;
}
else if (id == CSSValueInitial) {
if (num != 1)
return false;
addExpandedPropertyForValue(propId, cssValuePool().createExplicitInitialValue());
return true;
}
if (isKeywordPropertyID(propId)) {
if (!isValidKeywordPropertyAndValue(propId, id, m_context))
return false;
if (m_valueList->next() && !inShorthand())
return false;
addProperty(propId, cssValuePool().createIdentifierValue(id));
return true;
}
bool validPrimitive = false;
RefPtr<CSSValue> parsedValue = nullptr;
switch (propId) {
/* Start of supported CSS properties with validation. This is needed for parseShorthand to work
* correctly and allows optimization in blink::applyRule(..)
*/
case CSSPropertyOverflow: {
ShorthandScope scope(this, propId);
if (num != 1 || !parseValue(CSSPropertyOverflowY))
return false;
RefPtr<CSSValue> overflowXValue = nullptr;
// FIXME: -webkit-paged-x or -webkit-paged-y only apply to overflow-y. If this value has been
// set using the shorthand, then for now overflow-x will default to auto, but once we implement
// pagination controls, it should default to hidden. If the overflow-y value is anything but
// paged-x or paged-y, then overflow-x and overflow-y should have the same value.
if (id == CSSValueWebkitPagedX || id == CSSValueWebkitPagedY)
overflowXValue = cssValuePool().createIdentifierValue(CSSValueAuto);
else
overflowXValue = m_parsedProperties.last().value();
addProperty(CSSPropertyOverflowX, overflowXValue.release());
return true;
}
case CSSPropertyTextAlign:
// left | right | center | justify | -webkit-match-parent
// | start | end | <string> | inherit
if ((id >= CSSValueLeft && id <= CSSValueWebkitMatchParent) || id == CSSValueStart || id == CSSValueEnd
|| value->unit == CSSPrimitiveValue::CSS_STRING)
validPrimitive = true;
break;
case CSSPropertyFontWeight: { // normal | bold | bolder | lighter | 100 | 200 | 300 | 400 | 500 | 600 | 700 | 800 | 900 | inherit
if (m_valueList->size() != 1)
return false;
return parseFontWeight();
}
case CSSPropertyBorderSpacing: {
if (num == 1) {
ShorthandScope scope(this, CSSPropertyBorderSpacing);
if (!parseValue(CSSPropertyWebkitBorderHorizontalSpacing))
return false;
CSSValue* value = m_parsedProperties.last().value();
addProperty(CSSPropertyWebkitBorderVerticalSpacing, value);
return true;
}
else if (num == 2) {
ShorthandScope scope(this, CSSPropertyBorderSpacing);
if (!parseValue(CSSPropertyWebkitBorderHorizontalSpacing) || !parseValue(CSSPropertyWebkitBorderVerticalSpacing))
return false;
return true;
}
return false;
}
case CSSPropertyWebkitBorderHorizontalSpacing:
case CSSPropertyWebkitBorderVerticalSpacing:
validPrimitive = validUnit(value, FLength | FNonNeg);
break;
case CSSPropertyOutlineColor: // <color> | invert | inherit
// Outline color has "invert" as additional keyword.
if (id == CSSValueInvert) {
validPrimitive = true;
break;
}
/* nobreak */
case CSSPropertyBackgroundColor: // <color> | inherit
case CSSPropertyBorderTopColor: // <color> | inherit
case CSSPropertyBorderRightColor:
case CSSPropertyBorderBottomColor:
case CSSPropertyBorderLeftColor:
case CSSPropertyWebkitBorderStartColor:
case CSSPropertyWebkitBorderEndColor:
case CSSPropertyWebkitBorderBeforeColor:
case CSSPropertyWebkitBorderAfterColor:
case CSSPropertyColor: // <color> | inherit
case CSSPropertyTextDecorationColor: // CSS3 text decoration colors
case CSSPropertyWebkitTextEmphasisColor:
case CSSPropertyWebkitTextFillColor:
case CSSPropertyWebkitTextStrokeColor:
parsedValue = parseColor();
if (parsedValue)
m_valueList->next();
break;
case CSSPropertyBackgroundAttachment:
case CSSPropertyBackgroundClip:
case CSSPropertyWebkitBackgroundClip:
case CSSPropertyWebkitBackgroundComposite:
case CSSPropertyBackgroundImage:
case CSSPropertyBackgroundOrigin:
case CSSPropertyWebkitBackgroundOrigin:
case CSSPropertyBackgroundPosition:
case CSSPropertyBackgroundPositionX:
case CSSPropertyBackgroundPositionY:
case CSSPropertyBackgroundSize:
case CSSPropertyWebkitBackgroundSize:
case CSSPropertyBackgroundRepeat:
{
RefPtr<CSSValue> val1 = nullptr;
RefPtr<CSSValue> val2 = nullptr;
CSSPropertyID propId1, propId2;
bool result = false;
if (parseFillProperty(propId, propId1, propId2, val1, val2)) {
if (propId == CSSPropertyBackgroundPosition ||
propId == CSSPropertyBackgroundRepeat) {
ShorthandScope scope(this, propId);
addProperty(propId1, val1.release());
if (val2)
addProperty(propId2, val2.release());
} else {
addProperty(propId1, val1.release());
if (val2)
addProperty(propId2, val2.release());
}
result = true;
}
m_implicitShorthand = false;
return result;
}
case CSSPropertyObjectPosition:
ASSERT(RuntimeEnabledFeatures::objectFitPositionEnabled());
parsedValue = parseObjectPosition();
break;
case CSSPropertyWebkitTextStrokeWidth:
case CSSPropertyOutlineWidth: // <border-width> | inherit
case CSSPropertyBorderTopWidth: //// <border-width> | inherit
case CSSPropertyBorderRightWidth: // Which is defined as
case CSSPropertyBorderBottomWidth: // thin | medium | thick | <length>
case CSSPropertyBorderLeftWidth:
case CSSPropertyWebkitBorderStartWidth:
case CSSPropertyWebkitBorderEndWidth:
case CSSPropertyWebkitBorderBeforeWidth:
case CSSPropertyWebkitBorderAfterWidth:
if (id == CSSValueThin || id == CSSValueMedium || id == CSSValueThick)
validPrimitive = true;
else
validPrimitive = validUnit(value, FLength | FNonNeg);
break;
case CSSPropertyLetterSpacing: // normal | <length> | inherit
case CSSPropertyWordSpacing: // normal | <length> | inherit
if (id == CSSValueNormal)
validPrimitive = true;
else
validPrimitive = validUnit(value, FLength);
break;
case CSSPropertyTextIndent:
parsedValue = parseTextIndent();
break;
case CSSPropertyPaddingTop: //// <padding-width> | inherit
case CSSPropertyPaddingRight: // Which is defined as
case CSSPropertyPaddingBottom: // <length> | <percentage>
case CSSPropertyPaddingLeft: ////
case CSSPropertyWebkitPaddingStart:
case CSSPropertyWebkitPaddingEnd:
case CSSPropertyWebkitPaddingBefore:
case CSSPropertyWebkitPaddingAfter:
validPrimitive = (!id && validUnit(value, FLength | FPercent | FNonNeg));
break;
case CSSPropertyMaxWidth:
case CSSPropertyWebkitMaxLogicalWidth:
case CSSPropertyMaxHeight:
case CSSPropertyWebkitMaxLogicalHeight:
validPrimitive = (id == CSSValueNone || validWidthOrHeight(value));
break;
case CSSPropertyMinWidth:
case CSSPropertyWebkitMinLogicalWidth:
case CSSPropertyMinHeight:
case CSSPropertyWebkitMinLogicalHeight:
validPrimitive = validWidthOrHeight(value);
break;
case CSSPropertyWidth:
case CSSPropertyWebkitLogicalWidth:
case CSSPropertyHeight:
case CSSPropertyWebkitLogicalHeight:
validPrimitive = (id == CSSValueAuto || validWidthOrHeight(value));
break;
case CSSPropertyFontSize:
return parseFontSize();
case CSSPropertyFontVariant: // normal | small-caps | inherit
return parseFontVariant();
case CSSPropertyVerticalAlign:
// baseline | sub | super | top | text-top | middle | bottom | text-bottom |
// <percentage> | <length> | inherit
if (id >= CSSValueBaseline && id <= CSSValueWebkitBaselineMiddle)
validPrimitive = true;
else
validPrimitive = (!id && validUnit(value, FLength | FPercent));
break;
case CSSPropertyBottom: // <length> | <percentage> | auto | inherit
case CSSPropertyLeft: // <length> | <percentage> | auto | inherit
case CSSPropertyRight: // <length> | <percentage> | auto | inherit
case CSSPropertyTop: // <length> | <percentage> | auto | inherit
case CSSPropertyMarginTop: //// <margin-width> | inherit
case CSSPropertyMarginRight: // Which is defined as
case CSSPropertyMarginBottom: // <length> | <percentage> | auto | inherit
case CSSPropertyMarginLeft: ////
case CSSPropertyWebkitMarginStart:
case CSSPropertyWebkitMarginEnd:
case CSSPropertyWebkitMarginBefore:
case CSSPropertyWebkitMarginAfter:
if (id == CSSValueAuto)
validPrimitive = true;
else
validPrimitive = (!id && validUnit(value, FLength | FPercent));
break;
case CSSPropertyZIndex: // auto | <integer> | inherit
if (id == CSSValueAuto)
validPrimitive = true;
else
validPrimitive = (!id && validUnit(value, FInteger));
break;
case CSSPropertyLineHeight:
return parseLineHeight();
case CSSPropertyFontFamily:
// [[ <family-name> | <generic-family> ],]* [<family-name> | <generic-family>] | inherit
{
parsedValue = parseFontFamily();
break;
}
case CSSPropertyTextDecoration:
// Fall through 'text-decoration-line' parsing if CSS 3 Text Decoration
// is disabled to match CSS 2.1 rules for parsing 'text-decoration'.
if (RuntimeEnabledFeatures::css3TextDecorationsEnabled()) {
// [ <text-decoration-line> || <text-decoration-style> || <text-decoration-color> ] | inherit
return parseShorthand(CSSPropertyTextDecoration, textDecorationShorthand());
}
case CSSPropertyWebkitTextDecorationsInEffect:
case CSSPropertyTextDecorationLine:
// none | [ underline || overline || line-through || blink ] | inherit
return parseTextDecoration(propId);
case CSSPropertyTextUnderlinePosition:
// auto | under | inherit
ASSERT(RuntimeEnabledFeatures::css3TextDecorationsEnabled());
return parseTextUnderlinePosition();
case CSSPropertyUnicodeRange:
parsedValue = parseFontFaceUnicodeRange();
break;
/* CSS3 properties */
case CSSPropertyBorderTopRightRadius:
case CSSPropertyBorderTopLeftRadius:
case CSSPropertyBorderBottomLeftRadius:
case CSSPropertyBorderBottomRightRadius: {
if (num != 1 && num != 2)
return false;
validPrimitive = validUnit(value, FLength | FPercent | FNonNeg);
if (!validPrimitive)
return false;
RefPtr<CSSPrimitiveValue> parsedValue1 = createPrimitiveNumericValue(value);
RefPtr<CSSPrimitiveValue> parsedValue2 = nullptr;
if (num == 2) {
value = m_valueList->next();
validPrimitive = validUnit(value, FLength | FPercent | FNonNeg);
if (!validPrimitive)
return false;
parsedValue2 = createPrimitiveNumericValue(value);
} else
parsedValue2 = parsedValue1;
addProperty(propId, createPrimitiveValuePair(parsedValue1.release(), parsedValue2.release()));
return true;
}
case CSSPropertyTabSize:
validPrimitive = validUnit(value, FInteger | FNonNeg);
break;
case CSSPropertyWebkitAspectRatio:
parsedValue = parseAspectRatio();
break;
case CSSPropertyBorderRadius:
case CSSPropertyWebkitBorderRadius:
return parseBorderRadius(propId);
case CSSPropertyOutlineOffset:
validPrimitive = validUnit(value, FLength);
break;
case CSSPropertyTextShadow: // CSS2 property, dropped in CSS2.1, back in CSS3, so treat as CSS3
case CSSPropertyBoxShadow:
case CSSPropertyWebkitBoxShadow:
if (id == CSSValueNone)
validPrimitive = true;
else {
RefPtr<CSSValueList> shadowValueList = parseShadow(m_valueList, propId);
if (shadowValueList) {
addProperty(propId, shadowValueList.release());
m_valueList->next();
return true;
}
return false;
}
break;
case CSSPropertyOpacity:
validPrimitive = validUnit(value, FNumber);
break;
case CSSPropertyFilter:
if (id == CSSValueNone)
validPrimitive = true;
else {
RefPtr<CSSValue> val = parseFilter();
if (val) {
addProperty(propId, val);
return true;
}
return false;
}
break;
case CSSPropertyFlex: {
ShorthandScope scope(this, propId);
if (id == CSSValueNone) {
addProperty(CSSPropertyFlexGrow, cssValuePool().createValue(0, CSSPrimitiveValue::CSS_NUMBER));
addProperty(CSSPropertyFlexShrink, cssValuePool().createValue(0, CSSPrimitiveValue::CSS_NUMBER));
addProperty(CSSPropertyFlexBasis, cssValuePool().createIdentifierValue(CSSValueAuto));
return true;
}
return parseFlex(m_valueList);
}
case CSSPropertyFlexBasis:
// FIXME: Support intrinsic dimensions too.
if (id == CSSValueAuto)
validPrimitive = true;
else
validPrimitive = (!id && validUnit(value, FLength | FPercent | FNonNeg));
break;
case CSSPropertyFlexGrow:
case CSSPropertyFlexShrink:
validPrimitive = validUnit(value, FNumber | FNonNeg);
break;
case CSSPropertyOrder:
validPrimitive = validUnit(value, FInteger);
break;
case CSSPropertyTransform:
case CSSPropertyWebkitTransform:
if (id == CSSValueNone)
validPrimitive = true;
else {
RefPtr<CSSValue> transformValue = parseTransform(propId);
if (transformValue) {
addProperty(propId, transformValue.release());
return true;
}
return false;
}
break;
case CSSPropertyTransformOrigin: {
RefPtr<CSSValueList> list = parseTransformOrigin();
if (!list)
return false;
// These values are added to match gecko serialization.
if (list->length() == 1)
list->append(cssValuePool().createValue(50, CSSPrimitiveValue::CSS_PERCENTAGE));
if (list->length() == 2)
list->append(cssValuePool().createValue(0, CSSPrimitiveValue::CSS_PX));
addProperty(propId, list.release());
return true;
}
case CSSPropertyWebkitPerspectiveOriginX:
case CSSPropertyWebkitTransformOriginX:
parsedValue = parseFillPositionX(m_valueList);
if (parsedValue)
m_valueList->next();
break;
case CSSPropertyWebkitPerspectiveOriginY:
case CSSPropertyWebkitTransformOriginY:
parsedValue = parseFillPositionY(m_valueList);
if (parsedValue)
m_valueList->next();
break;
case CSSPropertyWebkitTransformOriginZ:
validPrimitive = validUnit(value, FLength);
break;
case CSSPropertyWebkitTransformOrigin:
return parseWebkitTransformOriginShorthand();
case CSSPropertyPerspective:
if (id == CSSValueNone) {
validPrimitive = true;
} else if (validUnit(value, FLength | FNonNeg)) {
addProperty(propId, createPrimitiveNumericValue(value));
return true;
}
break;
case CSSPropertyWebkitPerspective:
if (id == CSSValueNone) {
validPrimitive = true;
} else if (validUnit(value, FNumber | FLength | FNonNeg)) {
// Accepting valueless numbers is a quirk of the -webkit prefixed version of the property.
addProperty(propId, createPrimitiveNumericValue(value));
return true;
}
break;
case CSSPropertyPerspectiveOrigin: {
RefPtr<CSSValueList> list = parseTransformOrigin();
if (!list || list->length() == 3)
return false;
// This values are added to match gecko serialization.
if (list->length() == 1)
list->append(cssValuePool().createValue(50, CSSPrimitiveValue::CSS_PERCENTAGE));
addProperty(propId, list.release());
return true;
}
case CSSPropertyWebkitPerspectiveOrigin: {
if (m_valueList->size() > 2)
return false;
RefPtr<CSSValue> originX = nullptr;
RefPtr<CSSValue> originY = nullptr;
parse2ValuesFillPosition(m_valueList, originX, originY);
if (!originX)
return false;
addProperty(CSSPropertyWebkitPerspectiveOriginX, originX.release());
addProperty(CSSPropertyWebkitPerspectiveOriginY, originY.release());
return true;
}
// End of CSS3 properties
// Apple specific properties. These will never be standardized and are purely to
// support custom WebKit-based Apple applications.
case CSSPropertyWebkitFontSizeDelta: // <length>
validPrimitive = validUnit(value, FLength);
break;
case CSSPropertyWebkitHighlight:
if (id == CSSValueNone || value->unit == CSSPrimitiveValue::CSS_STRING)
validPrimitive = true;
break;
case CSSPropertyWebkitHyphenateCharacter:
if (id == CSSValueAuto || value->unit == CSSPrimitiveValue::CSS_STRING)
validPrimitive = true;
break;
case CSSPropertyWebkitLocale:
if (id == CSSValueAuto || value->unit == CSSPrimitiveValue::CSS_STRING)
validPrimitive = true;
break;
// End Apple-specific properties
case CSSPropertyWebkitTapHighlightColor:
parsedValue = parseColor();
if (parsedValue)
m_valueList->next();
break;
/* shorthand properties */
case CSSPropertyBackground: {
// Position must come before color in this array because a plain old "0" is a legal color
// in quirks mode but it's usually the X coordinate of a position.
const CSSPropertyID properties[] = { CSSPropertyBackgroundImage, CSSPropertyBackgroundRepeat,
CSSPropertyBackgroundAttachment, CSSPropertyBackgroundPosition, CSSPropertyBackgroundOrigin,
CSSPropertyBackgroundClip, CSSPropertyBackgroundColor, CSSPropertyBackgroundSize };
return parseFillShorthand(propId, properties, WTF_ARRAY_LENGTH(properties));
}
case CSSPropertyBorder:
// [ 'border-width' || 'border-style' || <color> ] | inherit
{
return parseShorthand(propId, parsingShorthandForProperty(CSSPropertyBorder));
}
case CSSPropertyBorderTop:
// [ 'border-top-width' || 'border-style' || <color> ] | inherit
return parseShorthand(propId, borderTopShorthand());
case CSSPropertyBorderRight:
// [ 'border-right-width' || 'border-style' || <color> ] | inherit
return parseShorthand(propId, borderRightShorthand());
case CSSPropertyBorderBottom:
// [ 'border-bottom-width' || 'border-style' || <color> ] | inherit
return parseShorthand(propId, borderBottomShorthand());
case CSSPropertyBorderLeft:
// [ 'border-left-width' || 'border-style' || <color> ] | inherit
return parseShorthand(propId, borderLeftShorthand());
case CSSPropertyWebkitBorderStart:
return parseShorthand(propId, webkitBorderStartShorthand());
case CSSPropertyWebkitBorderEnd:
return parseShorthand(propId, webkitBorderEndShorthand());
case CSSPropertyWebkitBorderBefore:
return parseShorthand(propId, webkitBorderBeforeShorthand());
case CSSPropertyWebkitBorderAfter:
return parseShorthand(propId, webkitBorderAfterShorthand());
case CSSPropertyOutline:
// [ 'outline-color' || 'outline-style' || 'outline-width' ] | inherit
return parseShorthand(propId, outlineShorthand());
case CSSPropertyBorderColor:
// <color>{1,4} | inherit
return parse4Values(propId, borderColorShorthand().properties());
case CSSPropertyBorderWidth:
// <border-width>{1,4} | inherit
return parse4Values(propId, borderWidthShorthand().properties());
case CSSPropertyBorderStyle:
// <border-style>{1,4} | inherit
return parse4Values(propId, borderStyleShorthand().properties());
case CSSPropertyMargin:
// <margin-width>{1,4} | inherit
return parse4Values(propId, marginShorthand().properties());
case CSSPropertyPadding:
// <padding-width>{1,4} | inherit
return parse4Values(propId, paddingShorthand().properties());
case CSSPropertyFlexFlow:
return parseShorthand(propId, flexFlowShorthand());
case CSSPropertyFont:
// [ [ 'font-style' || 'font-variant' || 'font-weight' ]? 'font-size' [ / 'line-height' ]?
// 'font-family' ] | inherit
return parseFont();
case CSSPropertyWebkitTextStroke:
return parseShorthand(propId, webkitTextStrokeShorthand());
case CSSPropertyInvalid:
return false;
// CSS Text Layout Module Level 3: Vertical writing support
case CSSPropertyWebkitTextEmphasis:
return parseShorthand(propId, webkitTextEmphasisShorthand());
case CSSPropertyWebkitTextEmphasisStyle:
return parseTextEmphasisStyle();
case CSSPropertyWebkitTextOrientation:
// FIXME: For now just support sideways, sideways-right, upright and vertical-right.
if (id == CSSValueSideways || id == CSSValueSidewaysRight || id == CSSValueVerticalRight || id == CSSValueUpright)
validPrimitive = true;
break;
case CSSPropertyWebkitLineBoxContain:
if (id == CSSValueNone)
validPrimitive = true;
else
return parseLineBoxContain();
break;
case CSSPropertyWebkitFontFeatureSettings:
if (id == CSSValueNormal)
validPrimitive = true;
else
return parseFontFeatureSettings();
break;
case CSSPropertyFontVariantLigatures:
if (id == CSSValueNormal)
validPrimitive = true;
else
return parseFontVariantLigatures();
break;
case CSSPropertyWebkitClipPath:
if (id == CSSValueNone) {
validPrimitive = true;
} else if (value->unit == CSSParserValue::Function) {
parsedValue = parseBasicShape();
} else if (value->unit == CSSPrimitiveValue::CSS_URI) {
parsedValue = CSSPrimitiveValue::create(value->string, CSSPrimitiveValue::CSS_URI);
addProperty(propId, parsedValue.release());
return true;
}
break;
case CSSPropertyTouchAction:
parsedValue = parseTouchAction();
break;
// Properties below are validated inside parseViewportProperty, because we
// check for parser state. We need to invalidate if someone adds them outside
// a @viewport rule.
case CSSPropertyOrientation:
validPrimitive = false;
break;
default:
return false;
}
if (validPrimitive) {
parsedValue = parseValidPrimitive(id, value);
m_valueList->next();
}
ASSERT(!m_parsedCalculation);
if (parsedValue) {
if (!m_valueList->current() || inShorthand()) {
addProperty(propId, parsedValue.release());
return true;
}
}
return false;
}
void CSSPropertyParser::addFillValue(RefPtr<CSSValue>& lval, PassRefPtr<CSSValue> rval)
{
if (lval) {
if (lval->isBaseValueList())
toCSSValueList(lval.get())->append(rval);
else {
PassRefPtr<CSSValue> oldlVal(lval.release());
PassRefPtr<CSSValueList> list = CSSValueList::createCommaSeparated();
list->append(oldlVal);
list->append(rval);
lval = list;
}
}
else
lval = rval;
}
static bool parseBackgroundClip(CSSParserValue* parserValue, RefPtr<CSSValue>& cssValue)
{
if (parserValue->id == CSSValueBorderBox || parserValue->id == CSSValuePaddingBox
|| parserValue->id == CSSValueContentBox) {
cssValue = cssValuePool().createIdentifierValue(parserValue->id);
return true;
}
return false;
}
const int cMaxFillProperties = 9;
bool CSSPropertyParser::parseFillShorthand(CSSPropertyID propId, const CSSPropertyID* properties, int numProperties)
{
ASSERT(numProperties <= cMaxFillProperties);
if (numProperties > cMaxFillProperties)
return false;
ShorthandScope scope(this, propId);
bool parsedProperty[cMaxFillProperties] = { false };
RefPtr<CSSValue> values[cMaxFillProperties];
#if ENABLE(OILPAN)
// Zero initialize the array of raw pointers.
memset(&values, 0, sizeof(values));
#endif
RefPtr<CSSValue> clipValue = nullptr;
RefPtr<CSSValue> positionYValue = nullptr;
RefPtr<CSSValue> repeatYValue = nullptr;
bool foundClip = false;
int i;
bool foundPositionCSSProperty = false;
while (m_valueList->current()) {
CSSParserValue* val = m_valueList->current();
if (val->unit == CSSParserValue::Operator && val->iValue == ',') {
// We hit the end. Fill in all remaining values with the initial value.
m_valueList->next();
for (i = 0; i < numProperties; ++i) {
if (properties[i] == CSSPropertyBackgroundColor && parsedProperty[i])
// Color is not allowed except as the last item in a list for backgrounds.
// Reject the entire property.
return false;
if (!parsedProperty[i] && properties[i] != CSSPropertyBackgroundColor) {
addFillValue(values[i], cssValuePool().createImplicitInitialValue());
if (properties[i] == CSSPropertyBackgroundPosition)
addFillValue(positionYValue, cssValuePool().createImplicitInitialValue());
if (properties[i] == CSSPropertyBackgroundRepeat)
addFillValue(repeatYValue, cssValuePool().createImplicitInitialValue());
if (properties[i] == CSSPropertyBackgroundOrigin && !parsedProperty[i]) {
// If background-origin wasn't present, then reset background-clip also.
addFillValue(clipValue, cssValuePool().createImplicitInitialValue());
}
}
parsedProperty[i] = false;
}
if (!m_valueList->current())
break;
}
bool sizeCSSPropertyExpected = false;
if (isForwardSlashOperator(val) && foundPositionCSSProperty) {
sizeCSSPropertyExpected = true;
m_valueList->next();
}
foundPositionCSSProperty = false;
bool found = false;
for (i = 0; !found && i < numProperties; ++i) {
if (sizeCSSPropertyExpected && properties[i] != CSSPropertyBackgroundSize)
continue;
if (!sizeCSSPropertyExpected && properties[i] == CSSPropertyBackgroundSize)
continue;
if (!parsedProperty[i]) {
RefPtr<CSSValue> val1 = nullptr;
RefPtr<CSSValue> val2 = nullptr;
CSSPropertyID propId1, propId2;
CSSParserValue* parserValue = m_valueList->current();
// parseFillProperty() may modify m_implicitShorthand, so we MUST reset it
// before EACH return below.
if (parseFillProperty(properties[i], propId1, propId2, val1, val2)) {
parsedProperty[i] = found = true;
addFillValue(values[i], val1.release());
if (properties[i] == CSSPropertyBackgroundPosition)
addFillValue(positionYValue, val2.release());
if (properties[i] == CSSPropertyBackgroundRepeat)
addFillValue(repeatYValue, val2.release());
if (properties[i] == CSSPropertyBackgroundOrigin) {
// Reparse the value as a clip, and see if we succeed.
if (parseBackgroundClip(parserValue, val1))
addFillValue(clipValue, val1.release()); // The property parsed successfully.
else
addFillValue(clipValue, cssValuePool().createImplicitInitialValue()); // Some value was used for origin that is not supported by clip. Just reset clip instead.
}
if (properties[i] == CSSPropertyBackgroundClip) {
// Update clipValue
addFillValue(clipValue, val1.release());
foundClip = true;
}
if (properties[i] == CSSPropertyBackgroundPosition)
foundPositionCSSProperty = true;
}
}
}
// if we didn't find at least one match, this is an
// invalid shorthand and we have to ignore it
if (!found) {
m_implicitShorthand = false;
return false;
}
}
// Now add all of the properties we found.
for (i = 0; i < numProperties; i++) {
// Fill in any remaining properties with the initial value.
if (!parsedProperty[i]) {
addFillValue(values[i], cssValuePool().createImplicitInitialValue());
if (properties[i] == CSSPropertyBackgroundPosition)
addFillValue(positionYValue, cssValuePool().createImplicitInitialValue());
if (properties[i] == CSSPropertyBackgroundRepeat)
addFillValue(repeatYValue, cssValuePool().createImplicitInitialValue());
if (properties[i] == CSSPropertyBackgroundOrigin) {
// If background-origin wasn't present, then reset background-clip also.
addFillValue(clipValue, cssValuePool().createImplicitInitialValue());
}
}
if (properties[i] == CSSPropertyBackgroundPosition) {
addProperty(CSSPropertyBackgroundPositionX, values[i].release());
// it's OK to call positionYValue.release() since we only see CSSPropertyBackgroundPosition once
addProperty(CSSPropertyBackgroundPositionY, positionYValue.release());
} else if (properties[i] == CSSPropertyBackgroundRepeat) {
addProperty(CSSPropertyBackgroundRepeatX, values[i].release());
// it's OK to call repeatYValue.release() since we only see CSSPropertyBackgroundPosition once
addProperty(CSSPropertyBackgroundRepeatY, repeatYValue.release());
} else if (properties[i] == CSSPropertyBackgroundClip && !foundClip)
// Value is already set while updating origin
continue;
else
addProperty(properties[i], values[i].release());
// Add in clip values when we hit the corresponding origin property.
if (properties[i] == CSSPropertyBackgroundOrigin && !foundClip)
addProperty(CSSPropertyBackgroundClip, clipValue.release());
}
m_implicitShorthand = false;
return true;
}
bool CSSPropertyParser::parseShorthand(CSSPropertyID propId, const StylePropertyShorthand& shorthand)
{
// We try to match as many properties as possible
// We set up an array of booleans to mark which property has been found,
// and we try to search for properties until it makes no longer any sense.
ShorthandScope scope(this, propId);
bool found = false;
unsigned propertiesParsed = 0;
bool propertyFound[6] = { false, false, false, false, false, false }; // 6 is enough size.
while (m_valueList->current()) {
found = false;
for (unsigned propIndex = 0; !found && propIndex < shorthand.length(); ++propIndex) {
if (!propertyFound[propIndex] && parseValue(shorthand.properties()[propIndex])) {
propertyFound[propIndex] = found = true;
propertiesParsed++;
}
}
// if we didn't find at least one match, this is an
// invalid shorthand and we have to ignore it
if (!found)
return false;
}
if (propertiesParsed == shorthand.length())
return true;
// Fill in any remaining properties with the initial value.
ImplicitScope implicitScope(this);
const StylePropertyShorthand* const* const propertiesForInitialization = shorthand.propertiesForInitialization();
for (unsigned i = 0; i < shorthand.length(); ++i) {
if (propertyFound[i])
continue;
if (propertiesForInitialization) {
const StylePropertyShorthand& initProperties = *(propertiesForInitialization[i]);
for (unsigned propIndex = 0; propIndex < initProperties.length(); ++propIndex)
addProperty(initProperties.properties()[propIndex], cssValuePool().createImplicitInitialValue());
} else
addProperty(shorthand.properties()[i], cssValuePool().createImplicitInitialValue());
}
return true;
}
bool CSSPropertyParser::parse4Values(CSSPropertyID propId, const CSSPropertyID *properties)
{
/* From the CSS 2 specs, 8.3
* If there is only one value, it applies to all sides. If there are two values, the top and
* bottom margins are set to the first value and the right and left margins are set to the second.
* If there are three values, the top is set to the first value, the left and right are set to the
* second, and the bottom is set to the third. If there are four values, they apply to the top,
* right, bottom, and left, respectively.
*/
int num = inShorthand() ? 1 : m_valueList->size();
ShorthandScope scope(this, propId);
// the order is top, right, bottom, left
switch (num) {
case 1: {
if (!parseValue(properties[0]))
return false;
CSSValue* value = m_parsedProperties.last().value();
ImplicitScope implicitScope(this);
addProperty(properties[1], value);
addProperty(properties[2], value);
addProperty(properties[3], value);
break;
}
case 2: {
if (!parseValue(properties[0]) || !parseValue(properties[1]))
return false;
CSSValue* value = m_parsedProperties[m_parsedProperties.size() - 2].value();
ImplicitScope implicitScope(this);
addProperty(properties[2], value);
value = m_parsedProperties[m_parsedProperties.size() - 2].value();
addProperty(properties[3], value);
break;
}
case 3: {
if (!parseValue(properties[0]) || !parseValue(properties[1]) || !parseValue(properties[2]))
return false;
CSSValue* value = m_parsedProperties[m_parsedProperties.size() - 2].value();
ImplicitScope implicitScope(this);
addProperty(properties[3], value);
break;
}
case 4: {
if (!parseValue(properties[0]) || !parseValue(properties[1]) ||
!parseValue(properties[2]) || !parseValue(properties[3]))
return false;
break;
}
default: {
return false;
}
}
return true;
}
PassRefPtr<CSSValue> CSSPropertyParser::parseAttr(CSSParserValueList* args)
{
if (args->size() != 1)
return nullptr;
CSSParserValue* a = args->current();
if (a->unit != CSSPrimitiveValue::CSS_IDENT)
return nullptr;
String attrName = a->string;
// CSS allows identifiers with "-" at the start, like "-webkit-foo".
// But HTML attribute names can't have those characters, and we should not
// even parse them inside attr().
if (attrName[0] == '-')
return nullptr;
return cssValuePool().createValue(attrName, CSSPrimitiveValue::CSS_ATTR);
}
PassRefPtr<CSSValue> CSSPropertyParser::parseBackgroundColor()
{
CSSValueID id = m_valueList->current()->id;
if (id == CSSValueCurrentcolor)
return cssValuePool().createIdentifierValue(id);
return parseColor();
}
bool CSSPropertyParser::parseFillImage(CSSParserValueList* valueList, RefPtr<CSSValue>& value)
{
if (valueList->current()->id == CSSValueNone) {
value = cssValuePool().createIdentifierValue(CSSValueNone);
return true;
}
if (isGeneratedImageValue(valueList->current()))
return parseGeneratedImage(valueList, value);
return false;
}
PassRefPtr<CSSValue> CSSPropertyParser::parseFillPositionX(CSSParserValueList* valueList)
{
int id = valueList->current()->id;
if (id == CSSValueLeft || id == CSSValueRight || id == CSSValueCenter) {
int percent = 0;
if (id == CSSValueRight)
percent = 100;
else if (id == CSSValueCenter)
percent = 50;
return cssValuePool().createValue(percent, CSSPrimitiveValue::CSS_PERCENTAGE);
}
if (validUnit(valueList->current(), FPercent | FLength))
return createPrimitiveNumericValue(valueList->current());
return nullptr;
}
PassRefPtr<CSSValue> CSSPropertyParser::parseFillPositionY(CSSParserValueList* valueList)
{
int id = valueList->current()->id;
if (id == CSSValueTop || id == CSSValueBottom || id == CSSValueCenter) {
int percent = 0;
if (id == CSSValueBottom)
percent = 100;
else if (id == CSSValueCenter)
percent = 50;
return cssValuePool().createValue(percent, CSSPrimitiveValue::CSS_PERCENTAGE);
}
if (validUnit(valueList->current(), FPercent | FLength))
return createPrimitiveNumericValue(valueList->current());
return nullptr;
}
PassRefPtr<CSSPrimitiveValue> CSSPropertyParser::parseFillPositionComponent(CSSParserValueList* valueList, unsigned& cumulativeFlags, FillPositionFlag& individualFlag, FillPositionParsingMode parsingMode)
{
CSSValueID id = valueList->current()->id;
if (id == CSSValueLeft || id == CSSValueTop || id == CSSValueRight || id == CSSValueBottom || id == CSSValueCenter) {
int percent = 0;
if (id == CSSValueLeft || id == CSSValueRight) {
if (cumulativeFlags & XFillPosition)
return nullptr;
cumulativeFlags |= XFillPosition;
individualFlag = XFillPosition;
if (id == CSSValueRight)
percent = 100;
}
else if (id == CSSValueTop || id == CSSValueBottom) {
if (cumulativeFlags & YFillPosition)
return nullptr;
cumulativeFlags |= YFillPosition;
individualFlag = YFillPosition;
if (id == CSSValueBottom)
percent = 100;
} else if (id == CSSValueCenter) {
// Center is ambiguous, so we're not sure which position we've found yet, an x or a y.
percent = 50;
cumulativeFlags |= AmbiguousFillPosition;
individualFlag = AmbiguousFillPosition;
}
if (parsingMode == ResolveValuesAsKeyword)
return cssValuePool().createIdentifierValue(id);
return cssValuePool().createValue(percent, CSSPrimitiveValue::CSS_PERCENTAGE);
}
if (validUnit(valueList->current(), FPercent | FLength)) {
if (!cumulativeFlags) {
cumulativeFlags |= XFillPosition;
individualFlag = XFillPosition;
} else if (cumulativeFlags & (XFillPosition | AmbiguousFillPosition)) {
cumulativeFlags |= YFillPosition;
individualFlag = YFillPosition;
} else {
if (m_parsedCalculation)
m_parsedCalculation.release();
return nullptr;
}
return createPrimitiveNumericValue(valueList->current());
}
return nullptr;
}
static bool isValueConflictingWithCurrentEdge(int value1, int value2)
{
if ((value1 == CSSValueLeft || value1 == CSSValueRight) && (value2 == CSSValueLeft || value2 == CSSValueRight))
return true;
if ((value1 == CSSValueTop || value1 == CSSValueBottom) && (value2 == CSSValueTop || value2 == CSSValueBottom))
return true;
return false;
}
static bool isFillPositionKeyword(CSSValueID value)
{
return value == CSSValueLeft || value == CSSValueTop || value == CSSValueBottom || value == CSSValueRight || value == CSSValueCenter;
}
void CSSPropertyParser::parse4ValuesFillPosition(CSSParserValueList* valueList, RefPtr<CSSValue>& value1, RefPtr<CSSValue>& value2, PassRefPtr<CSSPrimitiveValue> parsedValue1, PassRefPtr<CSSPrimitiveValue> parsedValue2)
{
// [ left | right ] [ <percentage] | <length> ] && [ top | bottom ] [ <percentage> | <length> ]
// In the case of 4 values <position> requires the second value to be a length or a percentage.
if (isFillPositionKeyword(parsedValue2->getValueID()))
return;
unsigned cumulativeFlags = 0;
FillPositionFlag value3Flag = InvalidFillPosition;
RefPtr<CSSPrimitiveValue> value3 = parseFillPositionComponent(valueList, cumulativeFlags, value3Flag, ResolveValuesAsKeyword);
if (!value3)
return;
CSSValueID ident1 = parsedValue1->getValueID();
CSSValueID ident3 = value3->getValueID();
if (ident1 == CSSValueCenter)
return;
if (!isFillPositionKeyword(ident3) || ident3 == CSSValueCenter)
return;
// We need to check if the values are not conflicting, e.g. they are not on the same edge. It is
// needed as the second call to parseFillPositionComponent was on purpose not checking it. In the
// case of two values top 20px is invalid but in the case of 4 values it becomes valid.
if (isValueConflictingWithCurrentEdge(ident1, ident3))
return;
valueList->next();
cumulativeFlags = 0;
FillPositionFlag value4Flag = InvalidFillPosition;
RefPtr<CSSPrimitiveValue> value4 = parseFillPositionComponent(valueList, cumulativeFlags, value4Flag, ResolveValuesAsKeyword);
if (!value4)
return;
// 4th value must be a length or a percentage.
if (isFillPositionKeyword(value4->getValueID()))
return;
value1 = createPrimitiveValuePair(parsedValue1, parsedValue2);
value2 = createPrimitiveValuePair(value3, value4);
if (ident1 == CSSValueTop || ident1 == CSSValueBottom)
value1.swap(value2);
valueList->next();
}
void CSSPropertyParser::parse3ValuesFillPosition(CSSParserValueList* valueList, RefPtr<CSSValue>& value1, RefPtr<CSSValue>& value2, PassRefPtr<CSSPrimitiveValue> parsedValue1, PassRefPtr<CSSPrimitiveValue> parsedValue2)
{
unsigned cumulativeFlags = 0;
FillPositionFlag value3Flag = InvalidFillPosition;
RefPtr<CSSPrimitiveValue> value3 = parseFillPositionComponent(valueList, cumulativeFlags, value3Flag, ResolveValuesAsKeyword);
// value3 is not an expected value, we return.
if (!value3)
return;
valueList->next();
bool swapNeeded = false;
CSSValueID ident1 = parsedValue1->getValueID();
CSSValueID ident2 = parsedValue2->getValueID();
CSSValueID ident3 = value3->getValueID();
CSSValueID firstPositionKeyword;
CSSValueID secondPositionKeyword;
if (ident1 == CSSValueCenter) {
// <position> requires the first 'center' to be followed by a keyword.
if (!isFillPositionKeyword(ident2))
return;
// If 'center' is the first keyword then the last one needs to be a length.
if (isFillPositionKeyword(ident3))
return;
firstPositionKeyword = CSSValueLeft;
if (ident2 == CSSValueLeft || ident2 == CSSValueRight) {
firstPositionKeyword = CSSValueTop;
swapNeeded = true;
}
value1 = createPrimitiveValuePair(cssValuePool().createIdentifierValue(firstPositionKeyword), cssValuePool().createValue(50, CSSPrimitiveValue::CSS_PERCENTAGE));
value2 = createPrimitiveValuePair(parsedValue2, value3);
} else if (ident3 == CSSValueCenter) {
if (isFillPositionKeyword(ident2))
return;
secondPositionKeyword = CSSValueTop;
if (ident1 == CSSValueTop || ident1 == CSSValueBottom) {
secondPositionKeyword = CSSValueLeft;
swapNeeded = true;
}
value1 = createPrimitiveValuePair(parsedValue1, parsedValue2);
value2 = createPrimitiveValuePair(cssValuePool().createIdentifierValue(secondPositionKeyword), cssValuePool().createValue(50, CSSPrimitiveValue::CSS_PERCENTAGE));
} else {
RefPtr<CSSPrimitiveValue> firstPositionValue = nullptr;
RefPtr<CSSPrimitiveValue> secondPositionValue = nullptr;
if (isFillPositionKeyword(ident2)) {
// To match CSS grammar, we should only accept: [ center | left | right | bottom | top ] [ left | right | top | bottom ] [ <percentage> | <length> ].
ASSERT(ident2 != CSSValueCenter);
if (isFillPositionKeyword(ident3))
return;
secondPositionValue = value3;
secondPositionKeyword = ident2;
firstPositionValue = cssValuePool().createValue(0, CSSPrimitiveValue::CSS_PERCENTAGE);
} else {
// Per CSS, we should only accept: [ right | left | top | bottom ] [ <percentage> | <length> ] [ center | left | right | bottom | top ].
if (!isFillPositionKeyword(ident3))
return;
firstPositionValue = parsedValue2;
secondPositionKeyword = ident3;
secondPositionValue = cssValuePool().createValue(0, CSSPrimitiveValue::CSS_PERCENTAGE);
}
if (isValueConflictingWithCurrentEdge(ident1, secondPositionKeyword))
return;
value1 = createPrimitiveValuePair(parsedValue1, firstPositionValue);
value2 = createPrimitiveValuePair(cssValuePool().createIdentifierValue(secondPositionKeyword), secondPositionValue);
}
if (ident1 == CSSValueTop || ident1 == CSSValueBottom || swapNeeded)
value1.swap(value2);
#if ENABLE(ASSERT)
CSSPrimitiveValue* first = toCSSPrimitiveValue(value1.get());
CSSPrimitiveValue* second = toCSSPrimitiveValue(value2.get());
ident1 = first->getPairValue()->first()->getValueID();
ident2 = second->getPairValue()->first()->getValueID();
ASSERT(ident1 == CSSValueLeft || ident1 == CSSValueRight);
ASSERT(ident2 == CSSValueBottom || ident2 == CSSValueTop);
#endif
}
inline bool CSSPropertyParser::isPotentialPositionValue(CSSParserValue* value)
{
return isFillPositionKeyword(value->id) || validUnit(value, FPercent | FLength, ReleaseParsedCalcValue);
}
void CSSPropertyParser::parseFillPosition(CSSParserValueList* valueList, RefPtr<CSSValue>& value1, RefPtr<CSSValue>& value2)
{
unsigned numberOfValues = 0;
for (unsigned i = valueList->currentIndex(); i < valueList->size(); ++i, ++numberOfValues) {
CSSParserValue* current = valueList->valueAt(i);
if (isComma(current) || !current || isForwardSlashOperator(current) || !isPotentialPositionValue(current))
break;
}
if (numberOfValues > 4)
return;
// If we are parsing two values, we can safely call the CSS 2.1 parsing function and return.
if (numberOfValues <= 2) {
parse2ValuesFillPosition(valueList, value1, value2);
return;
}
ASSERT(numberOfValues > 2 && numberOfValues <= 4);
CSSParserValue* value = valueList->current();
// <position> requires the first value to be a background keyword.
if (!isFillPositionKeyword(value->id))
return;
// Parse the first value. We're just making sure that it is one of the valid keywords or a percentage/length.
unsigned cumulativeFlags = 0;
FillPositionFlag value1Flag = InvalidFillPosition;
FillPositionFlag value2Flag = InvalidFillPosition;
value1 = parseFillPositionComponent(valueList, cumulativeFlags, value1Flag, ResolveValuesAsKeyword);
if (!value1)
return;
valueList->next();
// In case we are parsing more than two values, relax the check inside of parseFillPositionComponent. top 20px is
// a valid start for <position>.
cumulativeFlags = AmbiguousFillPosition;
value2 = parseFillPositionComponent(valueList, cumulativeFlags, value2Flag, ResolveValuesAsKeyword);
if (value2)
valueList->next();
else {
value1.clear();
return;
}
RefPtr<CSSPrimitiveValue> parsedValue1 = toCSSPrimitiveValue(value1.get());
RefPtr<CSSPrimitiveValue> parsedValue2 = toCSSPrimitiveValue(value2.get());
value1.clear();
value2.clear();
// Per CSS3 syntax, <position> can't have 'center' as its second keyword as we have more arguments to follow.
if (parsedValue2->getValueID() == CSSValueCenter)
return;
if (numberOfValues == 3)
parse3ValuesFillPosition(valueList, value1, value2, parsedValue1.release(), parsedValue2.release());
else
parse4ValuesFillPosition(valueList, value1, value2, parsedValue1.release(), parsedValue2.release());
}
void CSSPropertyParser::parse2ValuesFillPosition(CSSParserValueList* valueList, RefPtr<CSSValue>& value1, RefPtr<CSSValue>& value2)
{
// Parse the first value. We're just making sure that it is one of the valid keywords or a percentage/length.
unsigned cumulativeFlags = 0;
FillPositionFlag value1Flag = InvalidFillPosition;
FillPositionFlag value2Flag = InvalidFillPosition;
value1 = parseFillPositionComponent(valueList, cumulativeFlags, value1Flag);
if (!value1)
return;
// It only takes one value for background-position to be correctly parsed if it was specified in a shorthand (since we
// can assume that any other values belong to the rest of the shorthand). If we're not parsing a shorthand, though, the
// value was explicitly specified for our property.
CSSParserValue* value = valueList->next();
// First check for the comma. If so, we are finished parsing this value or value pair.
if (isComma(value))
value = 0;
if (value) {
value2 = parseFillPositionComponent(valueList, cumulativeFlags, value2Flag);
if (value2)
valueList->next();
else {
if (!inShorthand()) {
value1.clear();
return;
}
}
}
if (!value2)
// Only one value was specified. If that value was not a keyword, then it sets the x position, and the y position
// is simply 50%. This is our default.
// For keywords, the keyword was either an x-keyword (left/right), a y-keyword (top/bottom), or an ambiguous keyword (center).
// For left/right/center, the default of 50% in the y is still correct.
value2 = cssValuePool().createValue(50, CSSPrimitiveValue::CSS_PERCENTAGE);
if (value1Flag == YFillPosition || value2Flag == XFillPosition)
value1.swap(value2);
}
void CSSPropertyParser::parseFillRepeat(RefPtr<CSSValue>& value1, RefPtr<CSSValue>& value2)
{
CSSValueID id = m_valueList->current()->id;
if (id == CSSValueRepeatX) {
m_implicitShorthand = true;
value1 = cssValuePool().createIdentifierValue(CSSValueRepeat);
value2 = cssValuePool().createIdentifierValue(CSSValueNoRepeat);
m_valueList->next();
return;
}
if (id == CSSValueRepeatY) {
m_implicitShorthand = true;
value1 = cssValuePool().createIdentifierValue(CSSValueNoRepeat);
value2 = cssValuePool().createIdentifierValue(CSSValueRepeat);
m_valueList->next();
return;
}
if (id == CSSValueRepeat || id == CSSValueNoRepeat || id == CSSValueRound || id == CSSValueSpace)
value1 = cssValuePool().createIdentifierValue(id);
else {
value1 = nullptr;
return;
}
CSSParserValue* value = m_valueList->next();
// Parse the second value if one is available
if (value && !isComma(value)) {
id = value->id;
if (id == CSSValueRepeat || id == CSSValueNoRepeat || id == CSSValueRound || id == CSSValueSpace) {
value2 = cssValuePool().createIdentifierValue(id);
m_valueList->next();
return;
}
}
// If only one value was specified, value2 is the same as value1.
m_implicitShorthand = true;
value2 = cssValuePool().createIdentifierValue(toCSSPrimitiveValue(value1.get())->getValueID());
}
PassRefPtr<CSSValue> CSSPropertyParser::parseFillSize(CSSPropertyID propId, bool& allowComma)
{
allowComma = true;
CSSParserValue* value = m_valueList->current();
if (value->id == CSSValueContain || value->id == CSSValueCover)
return cssValuePool().createIdentifierValue(value->id);
RefPtr<CSSPrimitiveValue> parsedValue1 = nullptr;
if (value->id == CSSValueAuto)
parsedValue1 = cssValuePool().createIdentifierValue(CSSValueAuto);
else {
if (!validUnit(value, FLength | FPercent))
return nullptr;
parsedValue1 = createPrimitiveNumericValue(value);
}
RefPtr<CSSPrimitiveValue> parsedValue2 = nullptr;
value = m_valueList->next();
if (value) {
if (value->unit == CSSParserValue::Operator && value->iValue == ',')
allowComma = false;
else if (value->id != CSSValueAuto) {
if (!validUnit(value, FLength | FPercent)) {
if (!inShorthand())
return nullptr;
// We need to rewind the value list, so that when it is advanced we'll end up back at this value.
m_valueList->previous();
} else
parsedValue2 = createPrimitiveNumericValue(value);
}
} else if (!parsedValue2 && propId == CSSPropertyWebkitBackgroundSize) {
// FIXME(sky): Remove webkit-background-size.
// For backwards compatibility we set the second value to the first if it is omitted.
// We only need to do this for -webkit-background-size.
parsedValue2 = parsedValue1;
}
if (!parsedValue2)
return parsedValue1;
Pair::IdenticalValuesPolicy policy = propId == CSSPropertyWebkitBackgroundSize ?
Pair::DropIdenticalValues : Pair::KeepIdenticalValues;
return createPrimitiveValuePair(parsedValue1.release(), parsedValue2.release(), policy);
}
bool CSSPropertyParser::parseFillProperty(CSSPropertyID propId, CSSPropertyID& propId1, CSSPropertyID& propId2,
RefPtr<CSSValue>& retValue1, RefPtr<CSSValue>& retValue2)
{
RefPtr<CSSValueList> values = nullptr;
RefPtr<CSSValueList> values2 = nullptr;
RefPtr<CSSValue> value = nullptr;
RefPtr<CSSValue> value2 = nullptr;
bool allowComma = false;
retValue1 = retValue2 = nullptr;
propId1 = propId;
propId2 = propId;
if (propId == CSSPropertyBackgroundPosition) {
propId1 = CSSPropertyBackgroundPositionX;
propId2 = CSSPropertyBackgroundPositionY;
} else if (propId == CSSPropertyBackgroundRepeat) {
propId1 = CSSPropertyBackgroundRepeatX;
propId2 = CSSPropertyBackgroundRepeatY;
}
for (CSSParserValue* val = m_valueList->current(); val; val = m_valueList->current()) {
RefPtr<CSSValue> currValue = nullptr;
RefPtr<CSSValue> currValue2 = nullptr;
if (allowComma) {
if (!isComma(val))
return false;
m_valueList->next();
allowComma = false;
} else {
allowComma = true;
switch (propId) {
case CSSPropertyBackgroundColor:
currValue = parseBackgroundColor();
if (currValue)
m_valueList->next();
break;
case CSSPropertyBackgroundAttachment:
if (val->id == CSSValueFixed || val->id == CSSValueLocal) {
currValue = cssValuePool().createIdentifierValue(val->id);
m_valueList->next();
}
break;
case CSSPropertyBackgroundImage:
if (parseFillImage(m_valueList, currValue))
m_valueList->next();
break;
case CSSPropertyWebkitBackgroundClip:
case CSSPropertyWebkitBackgroundOrigin:
// The first three values here are deprecated and do not apply to the version of the property that has
// the -webkit- prefix removed.
if (val->id == CSSValueBorder || val->id == CSSValuePadding || val->id == CSSValueContent ||
val->id == CSSValueBorderBox || val->id == CSSValuePaddingBox || val->id == CSSValueContentBox ||
(propId == CSSPropertyWebkitBackgroundClip &&
(val->id == CSSValueText))) {
currValue = cssValuePool().createIdentifierValue(val->id);
m_valueList->next();
}
break;
case CSSPropertyBackgroundClip:
if (parseBackgroundClip(val, currValue))
m_valueList->next();
break;
case CSSPropertyBackgroundOrigin:
if (val->id == CSSValueBorderBox || val->id == CSSValuePaddingBox || val->id == CSSValueContentBox) {
currValue = cssValuePool().createIdentifierValue(val->id);
m_valueList->next();
}
break;
case CSSPropertyBackgroundPosition:
parseFillPosition(m_valueList, currValue, currValue2);
// parseFillPosition advances the m_valueList pointer.
break;
case CSSPropertyBackgroundPositionX: {
currValue = parseFillPositionX(m_valueList);
if (currValue)
m_valueList->next();
break;
}
case CSSPropertyBackgroundPositionY: {
currValue = parseFillPositionY(m_valueList);
if (currValue)
m_valueList->next();
break;
}
case CSSPropertyWebkitBackgroundComposite:
if (val->id >= CSSValueClear && val->id <= CSSValuePlusLighter) {
currValue = cssValuePool().createIdentifierValue(val->id);
m_valueList->next();
}
break;
case CSSPropertyBackgroundRepeat:
parseFillRepeat(currValue, currValue2);
// parseFillRepeat advances the m_valueList pointer
break;
case CSSPropertyBackgroundSize:
case CSSPropertyWebkitBackgroundSize: {
currValue = parseFillSize(propId, allowComma);
if (currValue)
m_valueList->next();
break;
}
default:
break;
}
if (!currValue)
return false;
if (value && !values) {
values = CSSValueList::createCommaSeparated();
values->append(value.release());
}
if (value2 && !values2) {
values2 = CSSValueList::createCommaSeparated();
values2->append(value2.release());
}
if (values)
values->append(currValue.release());
else
value = currValue.release();
if (currValue2) {
if (values2)
values2->append(currValue2.release());
else
value2 = currValue2.release();
}
}
// When parsing any fill shorthand property, we let it handle building up the lists for all
// properties.
if (inShorthand())
break;
}
if (values && values->length()) {
retValue1 = values.release();
if (values2 && values2->length())
retValue2 = values2.release();
return true;
}
if (value) {
retValue1 = value.release();
retValue2 = value2.release();
return true;
}
return false;
}
bool CSSPropertyParser::parseWebkitTransformOriginShorthand()
{
RefPtr<CSSValue> originX = nullptr;
RefPtr<CSSValue> originY = nullptr;
RefPtr<CSSValue> originZ = nullptr;
parse2ValuesFillPosition(m_valueList, originX, originY);
if (m_valueList->current()) {
if (!validUnit(m_valueList->current(), FLength))
return false;
originZ = createPrimitiveNumericValue(m_valueList->current());
m_valueList->next();
} else {
originZ = cssValuePool().createImplicitInitialValue();
}
addProperty(CSSPropertyWebkitTransformOriginX, originX.release());
addProperty(CSSPropertyWebkitTransformOriginY, originY.release());
addProperty(CSSPropertyWebkitTransformOriginZ, originZ.release());
return true;
}
static inline bool isCSSWideKeyword(CSSParserValue& value)
{
return value.id == CSSValueInitial || value.id == CSSValueInherit || value.id == CSSValueDefault;
}
static void completeBorderRadii(RefPtr<CSSPrimitiveValue> radii[4])
{
if (radii[3])
return;
if (!radii[2]) {
if (!radii[1])
radii[1] = radii[0];
radii[2] = radii[0];
}
radii[3] = radii[1];
}
// FIXME: This should be refactored with CSSParser::parseBorderRadius.
// CSSParser::parseBorderRadius contains support for some legacy radius construction.
PassRefPtr<CSSBasicShape> CSSPropertyParser::parseInsetRoundedCorners(PassRefPtr<CSSBasicShapeInset> shape, CSSParserValueList* args)
{
CSSParserValue* argument = args->next();
if (!argument)
return nullptr;
Vector<CSSParserValue*> radiusArguments;
while (argument) {
radiusArguments.append(argument);
argument = args->next();
}
unsigned num = radiusArguments.size();
if (!num || num > 9)
return nullptr;
// FIXME: Refactor completeBorderRadii and the array
RefPtr<CSSPrimitiveValue> radii[2][4];
#if ENABLE(OILPAN)
// Zero initialize the array of raw pointers.
memset(&radii, 0, sizeof(radii));
#endif
unsigned indexAfterSlash = 0;
for (unsigned i = 0; i < num; ++i) {
CSSParserValue* value = radiusArguments.at(i);
if (value->unit == CSSParserValue::Operator) {
if (value->iValue != '/')
return nullptr;
if (!i || indexAfterSlash || i + 1 == num)
return nullptr;
indexAfterSlash = i + 1;
completeBorderRadii(radii[0]);
continue;
}
if (i - indexAfterSlash >= 4)
return nullptr;
if (!validUnit(value, FLength | FPercent | FNonNeg))
return nullptr;
RefPtr<CSSPrimitiveValue> radius = createPrimitiveNumericValue(value);
if (!indexAfterSlash)
radii[0][i] = radius;
else
radii[1][i - indexAfterSlash] = radius.release();
}
if (!indexAfterSlash) {
completeBorderRadii(radii[0]);
for (unsigned i = 0; i < 4; ++i)
radii[1][i] = radii[0][i];
} else {
completeBorderRadii(radii[1]);
}
shape->setTopLeftRadius(createPrimitiveValuePair(radii[0][0].release(), radii[1][0].release()));
shape->setTopRightRadius(createPrimitiveValuePair(radii[0][1].release(), radii[1][1].release()));
shape->setBottomRightRadius(createPrimitiveValuePair(radii[0][2].release(), radii[1][2].release()));
shape->setBottomLeftRadius(createPrimitiveValuePair(radii[0][3].release(), radii[1][3].release()));
return shape;
}
PassRefPtr<CSSBasicShape> CSSPropertyParser::parseBasicShapeInset(CSSParserValueList* args)
{
ASSERT(args);
RefPtr<CSSBasicShapeInset> shape = CSSBasicShapeInset::create();
CSSParserValue* argument = args->current();
Vector<RefPtr<CSSPrimitiveValue> > widthArguments;
bool hasRoundedInset = false;
while (argument) {
if (argument->unit == CSSPrimitiveValue::CSS_IDENT && argument->id == CSSValueRound) {
hasRoundedInset = true;
break;
}
Units unitFlags = FLength | FPercent;
if (!validUnit(argument, unitFlags) || widthArguments.size() > 4)
return nullptr;
widthArguments.append(createPrimitiveNumericValue(argument));
argument = args->next();
}
switch (widthArguments.size()) {
case 1: {
shape->updateShapeSize1Value(widthArguments[0].get());
break;
}
case 2: {
shape->updateShapeSize2Values(widthArguments[0].get(), widthArguments[1].get());
break;
}
case 3: {
shape->updateShapeSize3Values(widthArguments[0].get(), widthArguments[1].get(), widthArguments[2].get());
break;
}
case 4: {
shape->updateShapeSize4Values(widthArguments[0].get(), widthArguments[1].get(), widthArguments[2].get(), widthArguments[3].get());
break;
}
default:
return nullptr;
}
if (hasRoundedInset)
return parseInsetRoundedCorners(shape, args);
return shape;
}
static bool isBaselinePositionKeyword(CSSValueID id)
{
return id == CSSValueBaseline || id == CSSValueLastBaseline;
}
static bool isItemPositionKeyword(CSSValueID id)
{
return id == CSSValueStart || id == CSSValueEnd || id == CSSValueCenter
|| id == CSSValueSelfStart || id == CSSValueSelfEnd || id == CSSValueFlexStart
|| id == CSSValueFlexEnd || id == CSSValueLeft || id == CSSValueRight;
}
bool CSSPropertyParser::parseItemPositionOverflowPosition(CSSPropertyID propId)
{
// auto | stretch | <baseline-position> | [<item-position> && <overflow-position>? ]
// <baseline-position> = baseline | last-baseline;
// <item-position> = center | start | end | self-start | self-end | flex-start | flex-end | left | right;
// <overflow-position> = true | safe
CSSParserValue* value = m_valueList->current();
if (!value)
return false;
if (value->id == CSSValueAuto || value->id == CSSValueStretch || isBaselinePositionKeyword(value->id)) {
if (m_valueList->next())
return false;
addProperty(propId, cssValuePool().createIdentifierValue(value->id));
return true;
}
RefPtr<CSSPrimitiveValue> position = nullptr;
RefPtr<CSSPrimitiveValue> overflowAlignmentKeyword = nullptr;
if (isItemPositionKeyword(value->id)) {
position = cssValuePool().createIdentifierValue(value->id);
value = m_valueList->next();
if (value) {
if (value->id == CSSValueTrue || value->id == CSSValueSafe)
overflowAlignmentKeyword = cssValuePool().createIdentifierValue(value->id);
else
return false;
}
} else if (value->id == CSSValueTrue || value->id == CSSValueSafe) {
overflowAlignmentKeyword = cssValuePool().createIdentifierValue(value->id);
value = m_valueList->next();
if (value && isItemPositionKeyword(value->id))
position = cssValuePool().createIdentifierValue(value->id);
else
return false;
} else {
return false;
}
if (m_valueList->next())
return false;
ASSERT(position);
if (overflowAlignmentKeyword)
addProperty(propId, createPrimitiveValuePair(position, overflowAlignmentKeyword));
else
addProperty(propId, position.release());
return true;
}
PassRefPtr<CSSPrimitiveValue> CSSPropertyParser::parseShapeRadius(CSSParserValue* value)
{
if (value->id == CSSValueClosestSide || value->id == CSSValueFarthestSide)
return cssValuePool().createIdentifierValue(value->id);
if (!validUnit(value, FLength | FPercent | FNonNeg))
return nullptr;
return createPrimitiveNumericValue(value);
}
PassRefPtr<CSSBasicShape> CSSPropertyParser::parseBasicShapeCircle(CSSParserValueList* args)
{
ASSERT(args);
// circle(radius)
// circle(radius at <position>)
// circle(at <position>)
// where position defines centerX and centerY using a CSS <position> data type.
RefPtr<CSSBasicShapeCircle> shape = CSSBasicShapeCircle::create();
for (CSSParserValue* argument = args->current(); argument; argument = args->next()) {
// The call to parseFillPosition below should consume all of the
// arguments except the first two. Thus, and index greater than one
// indicates an invalid production.
if (args->currentIndex() > 1)
return nullptr;
if (!args->currentIndex() && argument->id != CSSValueAt) {
if (RefPtr<CSSPrimitiveValue> radius = parseShapeRadius(argument)) {
shape->setRadius(radius);
continue;
}
return nullptr;
}
if (argument->id == CSSValueAt && args->next()) {
RefPtr<CSSValue> centerX = nullptr;
RefPtr<CSSValue> centerY = nullptr;
parseFillPosition(args, centerX, centerY);
if (centerX && centerY && !args->current()) {
ASSERT(centerX->isPrimitiveValue());
ASSERT(centerY->isPrimitiveValue());
shape->setCenterX(toCSSPrimitiveValue(centerX.get()));
shape->setCenterY(toCSSPrimitiveValue(centerY.get()));
} else {
return nullptr;
}
} else {
return nullptr;
}
}
return shape;
}
PassRefPtr<CSSBasicShape> CSSPropertyParser::parseBasicShapeEllipse(CSSParserValueList* args)
{
ASSERT(args);
// ellipse(radiusX)
// ellipse(radiusX at <position>)
// ellipse(radiusX radiusY)
// ellipse(radiusX radiusY at <position>)
// ellipse(at <position>)
// where position defines centerX and centerY using a CSS <position> data type.
RefPtr<CSSBasicShapeEllipse> shape = CSSBasicShapeEllipse::create();
for (CSSParserValue* argument = args->current(); argument; argument = args->next()) {
// The call to parseFillPosition below should consume all of the
// arguments except the first three. Thus, an index greater than two
// indicates an invalid production.
if (args->currentIndex() > 2)
return nullptr;
if (args->currentIndex() < 2 && argument->id != CSSValueAt) {
if (RefPtr<CSSPrimitiveValue> radius = parseShapeRadius(argument)) {
if (!shape->radiusX())
shape->setRadiusX(radius);
else
shape->setRadiusY(radius);
continue;
}
return nullptr;
}
if (argument->id != CSSValueAt || !args->next()) // expecting ellipse(.. at <position>)
return nullptr;
RefPtr<CSSValue> centerX = nullptr;
RefPtr<CSSValue> centerY = nullptr;
parseFillPosition(args, centerX, centerY);
if (!centerX || !centerY || args->current())
return nullptr;
ASSERT(centerX->isPrimitiveValue());
ASSERT(centerY->isPrimitiveValue());
shape->setCenterX(toCSSPrimitiveValue(centerX.get()));
shape->setCenterY(toCSSPrimitiveValue(centerY.get()));
}
return shape;
}
PassRefPtr<CSSBasicShape> CSSPropertyParser::parseBasicShapePolygon(CSSParserValueList* args)
{
ASSERT(args);
unsigned size = args->size();
if (!size)
return nullptr;
RefPtr<CSSBasicShapePolygon> shape = CSSBasicShapePolygon::create();
CSSParserValue* argument = args->current();
if (argument->id == CSSValueEvenodd || argument->id == CSSValueNonzero) {
shape->setWindRule(argument->id == CSSValueEvenodd ? RULE_EVENODD : RULE_NONZERO);
args->next();
if (!consumeComma(args))
return nullptr;
size -= 2;
}
// <length> <length>, ... <length> <length> -> each pair has 3 elements except the last one
if (!size || (size % 3) - 2)
return nullptr;
while (true) {
CSSParserValue* argumentX = args->current();
if (!argumentX || !validUnit(argumentX, FLength | FPercent))
return nullptr;
RefPtr<CSSPrimitiveValue> xLength = createPrimitiveNumericValue(argumentX);
CSSParserValue* argumentY = args->next();
if (!argumentY || !validUnit(argumentY, FLength | FPercent))
return nullptr;
RefPtr<CSSPrimitiveValue> yLength = createPrimitiveNumericValue(argumentY);
shape->appendPoint(xLength.release(), yLength.release());
if (!args->next())
break;
if (!consumeComma(args))
return nullptr;
}
return shape;
}
static bool isBoxValue(CSSValueID valueId)
{
switch (valueId) {
case CSSValueContentBox:
case CSSValuePaddingBox:
case CSSValueBorderBox:
case CSSValueMarginBox:
return true;
default:
break;
}
return false;
}
PassRefPtr<CSSValue> CSSPropertyParser::parseShapeProperty(CSSPropertyID propId)
{
CSSParserValue* value = m_valueList->current();
CSSValueID valueId = value->id;
if (valueId == CSSValueNone) {
RefPtr<CSSPrimitiveValue> keywordValue = parseValidPrimitive(valueId, value);
m_valueList->next();
return keywordValue.release();
}
RefPtr<CSSValue> imageValue = nullptr;
if (valueId != CSSValueNone && parseFillImage(m_valueList, imageValue)) {
m_valueList->next();
return imageValue.release();
}
return parseBasicShapeAndOrBox();
}
PassRefPtr<CSSValue> CSSPropertyParser::parseBasicShapeAndOrBox()
{
CSSParserValue* value = m_valueList->current();
bool shapeFound = false;
bool boxFound = false;
CSSValueID valueId;
RefPtr<CSSValueList> list = CSSValueList::createSpaceSeparated();
for (unsigned i = 0; i < 2; ++i) {
if (!value)
break;
valueId = value->id;
if (value->unit == CSSParserValue::Function && !shapeFound) {
// parseBasicShape already asks for the next value list item.
RefPtr<CSSPrimitiveValue> shapeValue = parseBasicShape();
if (!shapeValue)
return nullptr;
list->append(shapeValue.release());
shapeFound = true;
} else if (isBoxValue(valueId) && !boxFound) {
list->append(parseValidPrimitive(valueId, value));
boxFound = true;
m_valueList->next();
} else {
return nullptr;
}
value = m_valueList->current();
}
if (m_valueList->current())
return nullptr;
return list.release();
}
PassRefPtr<CSSPrimitiveValue> CSSPropertyParser::parseBasicShape()
{
CSSParserValue* value = m_valueList->current();
ASSERT(value->unit == CSSParserValue::Function);
CSSParserValueList* args = value->function->args.get();
if (!args)
return nullptr;
RefPtr<CSSBasicShape> shape = nullptr;
if (equalIgnoringCase(value->function->name, "circle("))
shape = parseBasicShapeCircle(args);
else if (equalIgnoringCase(value->function->name, "ellipse("))
shape = parseBasicShapeEllipse(args);
else if (equalIgnoringCase(value->function->name, "polygon("))
shape = parseBasicShapePolygon(args);
else if (equalIgnoringCase(value->function->name, "inset("))
shape = parseBasicShapeInset(args);
if (!shape)
return nullptr;
m_valueList->next();
return cssValuePool().createValue(shape.release());
}
// [ 'font-style' || 'font-variant' || 'font-weight' ]? 'font-size' [ / 'line-height' ]? 'font-family'
bool CSSPropertyParser::parseFont()
{
// Let's check if there is an inherit or initial somewhere in the shorthand.
for (unsigned i = 0; i < m_valueList->size(); ++i) {
if (m_valueList->valueAt(i)->id == CSSValueInherit || m_valueList->valueAt(i)->id == CSSValueInitial)
return false;
}
ShorthandScope scope(this, CSSPropertyFont);
// Optional font-style, font-variant and font-weight.
bool fontStyleParsed = false;
bool fontVariantParsed = false;
bool fontWeightParsed = false;
bool fontStretchParsed = false;
CSSParserValue* value = m_valueList->current();
for (; value; value = m_valueList->next()) {
if (!fontStyleParsed && isValidKeywordPropertyAndValue(CSSPropertyFontStyle, value->id, m_context)) {
addProperty(CSSPropertyFontStyle, cssValuePool().createIdentifierValue(value->id));
fontStyleParsed = true;
} else if (!fontVariantParsed && (value->id == CSSValueNormal || value->id == CSSValueSmallCaps)) {
// Font variant in the shorthand is particular, it only accepts normal or small-caps.
addProperty(CSSPropertyFontVariant, cssValuePool().createIdentifierValue(value->id));
fontVariantParsed = true;
} else if (!fontWeightParsed && parseFontWeight()) {
fontWeightParsed = true;
} else if (!fontStretchParsed && isValidKeywordPropertyAndValue(CSSPropertyFontStretch, value->id, m_context)) {
addProperty(CSSPropertyFontStretch, cssValuePool().createIdentifierValue(value->id));
fontStretchParsed = true;
} else {
break;
}
}
if (!value)
return false;
if (!fontStyleParsed)
addProperty(CSSPropertyFontStyle, cssValuePool().createIdentifierValue(CSSValueNormal), true);
if (!fontVariantParsed)
addProperty(CSSPropertyFontVariant, cssValuePool().createIdentifierValue(CSSValueNormal), true);
if (!fontWeightParsed)
addProperty(CSSPropertyFontWeight, cssValuePool().createIdentifierValue(CSSValueNormal), true);
if (!fontStretchParsed)
addProperty(CSSPropertyFontStretch, cssValuePool().createIdentifierValue(CSSValueNormal), true);
// Now a font size _must_ come.
// <absolute-size> | <relative-size> | <length> | <percentage> | inherit
if (!parseFontSize())
return false;
value = m_valueList->current();
if (!value)
return false;
if (isForwardSlashOperator(value)) {
// The line-height property.
value = m_valueList->next();
if (!value)
return false;
if (!parseLineHeight())
return false;
} else
addProperty(CSSPropertyLineHeight, cssValuePool().createIdentifierValue(CSSValueNormal), true);
// Font family must come now.
RefPtr<CSSValue> parsedFamilyValue = parseFontFamily();
if (!parsedFamilyValue)
return false;
addProperty(CSSPropertyFontFamily, parsedFamilyValue.release());
// FIXME: http://www.w3.org/TR/2011/WD-css3-fonts-20110324/#font-prop requires that
// "font-stretch", "font-size-adjust", and "font-kerning" be reset to their initial values
// but we don't seem to support them at the moment. They should also be added here once implemented.
if (m_valueList->current())
return false;
return true;
}
class FontFamilyValueBuilder {
DISALLOW_ALLOCATION();
public:
FontFamilyValueBuilder(CSSValueList* list)
: m_list(list)
{
}
void add(const CSSParserString& string)
{
if (!m_builder.isEmpty())
m_builder.append(' ');
if (string.is8Bit()) {
m_builder.append(string.characters8(), string.length());
return;
}
m_builder.append(string.characters16(), string.length());
}
void commit()
{
if (m_builder.isEmpty())
return;
m_list->append(cssValuePool().createFontFamilyValue(m_builder.toString()));
m_builder.clear();
}
private:
StringBuilder m_builder;
CSSValueList* m_list;
};
PassRefPtr<CSSValueList> CSSPropertyParser::parseFontFamily()
{
RefPtr<CSSValueList> list = CSSValueList::createCommaSeparated();
CSSParserValue* value = m_valueList->current();
FontFamilyValueBuilder familyBuilder(list.get());
bool inFamily = false;
while (value) {
CSSParserValue* nextValue = m_valueList->next();
bool nextValBreaksFont = !nextValue ||
(nextValue->unit == CSSParserValue::Operator && nextValue->iValue == ',');
bool nextValIsFontName = nextValue &&
((nextValue->id >= CSSValueSerif && nextValue->id <= CSSValueWebkitBody) ||
(nextValue->unit == CSSPrimitiveValue::CSS_STRING || nextValue->unit == CSSPrimitiveValue::CSS_IDENT));
if (isCSSWideKeyword(*value) && !inFamily) {
if (nextValBreaksFont)
value = m_valueList->next();
else if (nextValIsFontName)
value = nextValue;
continue;
}
if (value->id >= CSSValueSerif && value->id <= CSSValueWebkitBody) {
if (inFamily)
familyBuilder.add(value->string);
else if (nextValBreaksFont || !nextValIsFontName)
list->append(cssValuePool().createIdentifierValue(value->id));
else {
familyBuilder.commit();
familyBuilder.add(value->string);
inFamily = true;
}
} else if (value->unit == CSSPrimitiveValue::CSS_STRING) {
// Strings never share in a family name.
inFamily = false;
familyBuilder.commit();
list->append(cssValuePool().createFontFamilyValue(value->string));
} else if (value->unit == CSSPrimitiveValue::CSS_IDENT) {
if (inFamily)
familyBuilder.add(value->string);
else if (nextValBreaksFont || !nextValIsFontName)
list->append(cssValuePool().createFontFamilyValue(value->string));
else {
familyBuilder.commit();
familyBuilder.add(value->string);
inFamily = true;
}
} else {
break;
}
if (!nextValue)
break;
if (nextValBreaksFont) {
value = m_valueList->next();
familyBuilder.commit();
inFamily = false;
}
else if (nextValIsFontName)
value = nextValue;
else
break;
}
familyBuilder.commit();
if (!list->length())
list = nullptr;
return list.release();
}
bool CSSPropertyParser::parseLineHeight()
{
CSSParserValue* value = m_valueList->current();
CSSValueID id = value->id;
bool validPrimitive = false;
// normal | <number> | <length> | <percentage> | inherit
if (id == CSSValueNormal)
validPrimitive = true;
else
validPrimitive = (!id && validUnit(value, FNumber | FLength | FPercent | FNonNeg));
if (validPrimitive && (!m_valueList->next() || inShorthand()))
addProperty(CSSPropertyLineHeight, parseValidPrimitive(id, value));
return validPrimitive;
}
bool CSSPropertyParser::parseFontSize()
{
CSSParserValue* value = m_valueList->current();
CSSValueID id = value->id;
bool validPrimitive = false;
// <absolute-size> | <relative-size> | <length> | <percentage> | inherit
if (id >= CSSValueXxSmall && id <= CSSValueLarger)
validPrimitive = true;
else
validPrimitive = validUnit(value, FLength | FPercent | FNonNeg);
if (validPrimitive && (!m_valueList->next() || inShorthand()))
addProperty(CSSPropertyFontSize, parseValidPrimitive(id, value));
return validPrimitive;
}
bool CSSPropertyParser::parseFontVariant()
{
RefPtr<CSSValueList> values = nullptr;
if (m_valueList->size() > 1)
values = CSSValueList::createCommaSeparated();
bool expectComma = false;
for (CSSParserValue* val = m_valueList->current(); val; val = m_valueList->current()) {
RefPtr<CSSPrimitiveValue> parsedValue = nullptr;
if (!expectComma) {
expectComma = true;
if (val->id == CSSValueNormal || val->id == CSSValueSmallCaps)
parsedValue = cssValuePool().createIdentifierValue(val->id);
else if (val->id == CSSValueAll && !values) {
// FIXME: CSSPropertyParser::parseFontVariant() implements
// the old css3 draft:
// http://www.w3.org/TR/2002/WD-css3-webfonts-20020802/#font-variant
// 'all' is only allowed in @font-face and with no other values. Make a value list to
// indicate that we are in the @font-face case.
values = CSSValueList::createCommaSeparated();
parsedValue = cssValuePool().createIdentifierValue(val->id);
}
} else if (consumeComma(m_valueList)) {
expectComma = false;
continue;
}
if (!parsedValue)
return false;
m_valueList->next();
if (values)
values->append(parsedValue.release());
else {
addProperty(CSSPropertyFontVariant, parsedValue.release());
return true;
}
}
if (values && values->length()) {
if (m_ruleType != CSSRuleSourceData::FONT_FACE_RULE)
return false;
addProperty(CSSPropertyFontVariant, values.release());
return true;
}
return false;
}
bool CSSPropertyParser::parseFontWeight()
{
CSSParserValue* value = m_valueList->current();
if (value->id >= CSSValueNormal && value->id <= CSSValueLighter) {
addProperty(CSSPropertyFontWeight, cssValuePool().createIdentifierValue(value->id));
return true;
}
if (value->unit == CSSPrimitiveValue::CSS_NUMBER) {
int weight = static_cast<int>(value->fValue);
if (!(weight % 100) && weight >= 100 && weight <= 900) {
addProperty(CSSPropertyFontWeight, cssValuePool().createIdentifierValue(static_cast<CSSValueID>(CSSValue100 + weight / 100 - 1)));
return true;
}
}
return false;
}
PassRefPtr<CSSValueList> CSSPropertyParser::parseFontFaceUnicodeRange()
{
RefPtr<CSSValueList> values = CSSValueList::createCommaSeparated();
do {
CSSParserValue* current = m_valueList->current();
if (!current || current->unit != CSSPrimitiveValue::CSS_UNICODE_RANGE)
return nullptr;
String rangeString = current->string;
UChar32 from = 0;
UChar32 to = 0;
unsigned length = rangeString.length();
if (length < 3)
return nullptr;
unsigned i = 2;
while (i < length) {
UChar c = rangeString[i];
if (c == '-' || c == '?')
break;
from *= 16;
if (c >= '0' && c <= '9')
from += c - '0';
else if (c >= 'A' && c <= 'F')
from += 10 + c - 'A';
else if (c >= 'a' && c <= 'f')
from += 10 + c - 'a';
else
return nullptr;
i++;
}
if (i == length)
to = from;
else if (rangeString[i] == '?') {
unsigned span = 1;
while (i < length && rangeString[i] == '?') {
span *= 16;
from *= 16;
i++;
}
if (i < length)
return nullptr;
to = from + span - 1;
} else {
if (length < i + 2)
return nullptr;
i++;
while (i < length) {
UChar c = rangeString[i];
to *= 16;
if (c >= '0' && c <= '9')
to += c - '0';
else if (c >= 'A' && c <= 'F')
to += 10 + c - 'A';
else if (c >= 'a' && c <= 'f')
to += 10 + c - 'a';
else
return nullptr;
i++;
}
}
if (from <= to)
values->append(CSSUnicodeRangeValue::create(from, to));
m_valueList->next();
} while (consumeComma(m_valueList));
return values.release();
}
// Returns the number of characters which form a valid double
// and are terminated by the given terminator character
template <typename CharacterType>
static int checkForValidDouble(const CharacterType* string, const CharacterType* end, const char terminator)
{
int length = end - string;
if (length < 1)
return 0;
bool decimalMarkSeen = false;
int processedLength = 0;
for (int i = 0; i < length; ++i) {
if (string[i] == terminator) {
processedLength = i;
break;
}
if (!isASCIIDigit(string[i])) {
if (!decimalMarkSeen && string[i] == '.')
decimalMarkSeen = true;
else
return 0;
}
}
if (decimalMarkSeen && processedLength == 1)
return 0;
return processedLength;
}
// Returns the number of characters consumed for parsing a valid double
// terminated by the given terminator character
template <typename CharacterType>
static int parseDouble(const CharacterType* string, const CharacterType* end, const char terminator, double& value)
{
int length = checkForValidDouble(string, end, terminator);
if (!length)
return 0;
int position = 0;
double localValue = 0;
// The consumed characters here are guaranteed to be
// ASCII digits with or without a decimal mark
for (; position < length; ++position) {
if (string[position] == '.')
break;
localValue = localValue * 10 + string[position] - '0';
}
if (++position == length) {
value = localValue;
return length;
}
double fraction = 0;
double scale = 1;
while (position < length && scale < MAX_SCALE) {
fraction = fraction * 10 + string[position++] - '0';
scale *= 10;
}
value = localValue + fraction / scale;
return length;
}
template <typename CharacterType>
static bool parseColorIntOrPercentage(const CharacterType*& string, const CharacterType* end, const char terminator, CSSPrimitiveValue::UnitType& expect, int& value)
{
const CharacterType* current = string;
double localValue = 0;
bool negative = false;
while (current != end && isHTMLSpace<CharacterType>(*current))
current++;
if (current != end && *current == '-') {
negative = true;
current++;
}
if (current == end || !isASCIIDigit(*current))
return false;
while (current != end && isASCIIDigit(*current)) {
double newValue = localValue * 10 + *current++ - '0';
if (newValue >= 255) {
// Clamp values at 255.
localValue = 255;
while (current != end && isASCIIDigit(*current))
++current;
break;
}
localValue = newValue;
}
if (current == end)
return false;
if (expect == CSSPrimitiveValue::CSS_NUMBER && (*current == '.' || *current == '%'))
return false;
if (*current == '.') {
// We already parsed the integral part, try to parse
// the fraction part of the percentage value.
double percentage = 0;
int numCharactersParsed = parseDouble(current, end, '%', percentage);
if (!numCharactersParsed)
return false;
current += numCharactersParsed;
if (*current != '%')
return false;
localValue += percentage;
}
if (expect == CSSPrimitiveValue::CSS_PERCENTAGE && *current != '%')
return false;
if (*current == '%') {
expect = CSSPrimitiveValue::CSS_PERCENTAGE;
localValue = localValue / 100.0 * 256.0;
// Clamp values at 255 for percentages over 100%
if (localValue > 255)
localValue = 255;
current++;
} else
expect = CSSPrimitiveValue::CSS_NUMBER;
while (current != end && isHTMLSpace<CharacterType>(*current))
current++;
if (current == end || *current++ != terminator)
return false;
// Clamp negative values at zero.
value = negative ? 0 : static_cast<int>(localValue);
string = current;
return true;
}
template <typename CharacterType>
static inline bool isTenthAlpha(const CharacterType* string, const int length)
{
// "0.X"
if (length == 3 && string[0] == '0' && string[1] == '.' && isASCIIDigit(string[2]))
return true;
// ".X"
if (length == 2 && string[0] == '.' && isASCIIDigit(string[1]))
return true;
return false;
}
template <typename CharacterType>
static inline bool parseAlphaValue(const CharacterType*& string, const CharacterType* end, const char terminator, int& value)
{
while (string != end && isHTMLSpace<CharacterType>(*string))
string++;
bool negative = false;
if (string != end && *string == '-') {
negative = true;
string++;
}
value = 0;
int length = end - string;
if (length < 2)
return false;
if (string[length - 1] != terminator || !isASCIIDigit(string[length - 2]))
return false;
if (string[0] != '0' && string[0] != '1' && string[0] != '.') {
if (checkForValidDouble(string, end, terminator)) {
value = negative ? 0 : 255;
string = end;
return true;
}
return false;
}
if (length == 2 && string[0] != '.') {
value = !negative && string[0] == '1' ? 255 : 0;
string = end;
return true;
}
if (isTenthAlpha(string, length - 1)) {
static const int tenthAlphaValues[] = { 0, 25, 51, 76, 102, 127, 153, 179, 204, 230 };
value = negative ? 0 : tenthAlphaValues[string[length - 2] - '0'];
string = end;
return true;
}
double alpha = 0;
if (!parseDouble(string, end, terminator, alpha))
return false;
value = negative ? 0 : static_cast<int>(alpha * nextafter(256.0, 0.0));
string = end;
return true;
}
template <typename CharacterType>
static inline bool mightBeRGBA(const CharacterType* characters, unsigned length)
{
if (length < 5)
return false;
return characters[4] == '('
&& isASCIIAlphaCaselessEqual(characters[0], 'r')
&& isASCIIAlphaCaselessEqual(characters[1], 'g')
&& isASCIIAlphaCaselessEqual(characters[2], 'b')
&& isASCIIAlphaCaselessEqual(characters[3], 'a');
}
template <typename CharacterType>
static inline bool mightBeRGB(const CharacterType* characters, unsigned length)
{
if (length < 4)
return false;
return characters[3] == '('
&& isASCIIAlphaCaselessEqual(characters[0], 'r')
&& isASCIIAlphaCaselessEqual(characters[1], 'g')
&& isASCIIAlphaCaselessEqual(characters[2], 'b');
}
template <typename CharacterType>
static inline bool fastParseColorInternal(RGBA32& rgb, const CharacterType* characters, unsigned length , bool strict)
{
CSSPrimitiveValue::UnitType expect = CSSPrimitiveValue::CSS_UNKNOWN;
if (length >= 4 && characters[0] == '#')
return Color::parseHexColor(characters + 1, length - 1, rgb);
if (!strict && length >= 3) {
if (Color::parseHexColor(characters, length, rgb))
return true;
}
// Try rgba() syntax.
if (mightBeRGBA(characters, length)) {
const CharacterType* current = characters + 5;
const CharacterType* end = characters + length;
int red;
int green;
int blue;
int alpha;
if (!parseColorIntOrPercentage(current, end, ',', expect, red))
return false;
if (!parseColorIntOrPercentage(current, end, ',', expect, green))
return false;
if (!parseColorIntOrPercentage(current, end, ',', expect, blue))
return false;
if (!parseAlphaValue(current, end, ')', alpha))
return false;
if (current != end)
return false;
rgb = makeRGBA(red, green, blue, alpha);
return true;
}
// Try rgb() syntax.
if (mightBeRGB(characters, length)) {
const CharacterType* current = characters + 4;
const CharacterType* end = characters + length;
int red;
int green;
int blue;
if (!parseColorIntOrPercentage(current, end, ',', expect, red))
return false;
if (!parseColorIntOrPercentage(current, end, ',', expect, green))
return false;
if (!parseColorIntOrPercentage(current, end, ')', expect, blue))
return false;
if (current != end)
return false;
rgb = makeRGB(red, green, blue);
return true;
}
return false;
}
template<typename StringType>
bool CSSPropertyParser::fastParseColor(RGBA32& rgb, const StringType& name, bool strict)
{
unsigned length = name.length();
bool parseResult;
if (!length)
return false;
if (name.is8Bit())
parseResult = fastParseColorInternal(rgb, name.characters8(), length, strict);
else
parseResult = fastParseColorInternal(rgb, name.characters16(), length, strict);
if (parseResult)
return true;
// Try named colors.
Color tc;
if (!tc.setNamedColor(name))
return false;
rgb = tc.rgb();
return true;
}
template bool CSSPropertyParser::fastParseColor(RGBA32&, const String&, bool strict);
bool CSSPropertyParser::isCalculation(CSSParserValue* value)
{
return (value->unit == CSSParserValue::Function)
&& (equalIgnoringCase(value->function->name, "calc(")
|| equalIgnoringCase(value->function->name, "-webkit-calc("));
}
inline int CSSPropertyParser::colorIntFromValue(CSSParserValue* v)
{
bool isPercent;
double value;
if (m_parsedCalculation) {
isPercent = m_parsedCalculation->category() == CalcPercent;
value = m_parsedCalculation->doubleValue();
m_parsedCalculation.release();
} else {
isPercent = v->unit == CSSPrimitiveValue::CSS_PERCENTAGE;
value = v->fValue;
}
if (value <= 0.0)
return 0;
if (isPercent) {
if (value >= 100.0)
return 255;
return static_cast<int>(value * 256.0 / 100.0);
}
if (value >= 255.0)
return 255;
return static_cast<int>(value);
}
bool CSSPropertyParser::parseColorParameters(CSSParserValue* value, int* colorArray, bool parseAlpha)
{
CSSParserValueList* args = value->function->args.get();
CSSParserValue* v = args->current();
Units unitType = FUnknown;
// Get the first value and its type
if (validUnit(v, FInteger))
unitType = FInteger;
else if (validUnit(v, FPercent))
unitType = FPercent;
else
return false;
colorArray[0] = colorIntFromValue(v);
for (int i = 1; i < 3; i++) {
args->next();
if (!consumeComma(args))
return false;
v = args->current();
if (!validUnit(v, unitType))
return false;
colorArray[i] = colorIntFromValue(v);
}
if (parseAlpha) {
args->next();
if (!consumeComma(args))
return false;
v = args->current();
if (!validUnit(v, FNumber))
return false;
// Convert the floating pointer number of alpha to an integer in the range [0, 256),
// with an equal distribution across all 256 values.
colorArray[3] = static_cast<int>(std::max(0.0, std::min(1.0, v->fValue)) * nextafter(256.0, 0.0));
}
return true;
}
// The CSS3 specification defines the format of a HSL color as
// hsl(<number>, <percent>, <percent>)
// and with alpha, the format is
// hsla(<number>, <percent>, <percent>, <number>)
// The first value, HUE, is in an angle with a value between 0 and 360
bool CSSPropertyParser::parseHSLParameters(CSSParserValue* value, double* colorArray, bool parseAlpha)
{
CSSParserValueList* args = value->function->args.get();
CSSParserValue* v = args->current();
// Get the first value
if (!validUnit(v, FNumber))
return false;
// normalize the Hue value and change it to be between 0 and 1.0
colorArray[0] = (((static_cast<int>(v->fValue) % 360) + 360) % 360) / 360.0;
for (int i = 1; i < 3; i++) {
args->next();
if (!consumeComma(args))
return false;
v = args->current();
if (!validUnit(v, FPercent))
return false;
double percentValue = m_parsedCalculation ? m_parsedCalculation.release()->doubleValue() : v->fValue;
colorArray[i] = std::max(0.0, std::min(100.0, percentValue)) / 100.0; // needs to be value between 0 and 1.0
}
if (parseAlpha) {
args->next();
if (!consumeComma(args))
return false;
v = args->current();
if (!validUnit(v, FNumber))
return false;
colorArray[3] = std::max(0.0, std::min(1.0, v->fValue));
}
return true;
}
PassRefPtr<CSSPrimitiveValue> CSSPropertyParser::parseColor(CSSParserValue* value, bool acceptQuirkyColors)
{
RGBA32 c = Color::transparent;
if (!parseColorFromValue(value ? value : m_valueList->current(), c, acceptQuirkyColors))
return nullptr;
return cssValuePool().createColorValue(c);
}
bool CSSPropertyParser::parseColorFromValue(CSSParserValue* value, RGBA32& c, bool acceptQuirkyColors)
{
if (acceptQuirkyColors && value->unit == CSSPrimitiveValue::CSS_NUMBER
&& value->fValue >= 0. && value->fValue < 1000000.) {
String str = String::format("%06d", static_cast<int>((value->fValue+.5)));
// FIXME: This should be strict parsing for SVG as well.
if (!fastParseColor(c, str, !acceptQuirkyColors))
return false;
} else if (value->unit == CSSPrimitiveValue::CSS_PARSER_HEXCOLOR
|| value->unit == CSSPrimitiveValue::CSS_IDENT
|| (acceptQuirkyColors && value->unit == CSSPrimitiveValue::CSS_DIMENSION)) {
if (!fastParseColor(c, value->string, !acceptQuirkyColors && value->unit == CSSPrimitiveValue::CSS_IDENT))
return false;
} else if (value->unit == CSSParserValue::Function &&
value->function->args != 0 &&
value->function->args->size() == 5 /* rgb + two commas */ &&
equalIgnoringCase(value->function->name, "rgb(")) {
int colorValues[3];
if (!parseColorParameters(value, colorValues, false))
return false;
c = makeRGB(colorValues[0], colorValues[1], colorValues[2]);
} else {
if (value->unit == CSSParserValue::Function &&
value->function->args != 0 &&
value->function->args->size() == 7 /* rgba + three commas */ &&
equalIgnoringCase(value->function->name, "rgba(")) {
int colorValues[4];
if (!parseColorParameters(value, colorValues, true))
return false;
c = makeRGBA(colorValues[0], colorValues[1], colorValues[2], colorValues[3]);
} else if (value->unit == CSSParserValue::Function &&
value->function->args != 0 &&
value->function->args->size() == 5 /* hsl + two commas */ &&
equalIgnoringCase(value->function->name, "hsl(")) {
double colorValues[3];
if (!parseHSLParameters(value, colorValues, false))
return false;
c = makeRGBAFromHSLA(colorValues[0], colorValues[1], colorValues[2], 1.0);
} else if (value->unit == CSSParserValue::Function &&
value->function->args != 0 &&
value->function->args->size() == 7 /* hsla + three commas */ &&
equalIgnoringCase(value->function->name, "hsla(")) {
double colorValues[4];
if (!parseHSLParameters(value, colorValues, true))
return false;
c = makeRGBAFromHSLA(colorValues[0], colorValues[1], colorValues[2], colorValues[3]);
} else
return false;
}
return true;
}
// This class tracks parsing state for shadow values. If it goes out of scope (e.g., due to an early return)
// without the allowBreak bit being set, then it will clean up all of the objects and destroy them.
class ShadowParseContext {
STACK_ALLOCATED();
public:
ShadowParseContext(CSSPropertyID prop, CSSPropertyParser* parser)
: property(prop)
, m_parser(parser)
, allowX(true)
, allowY(false)
, allowBlur(false)
, allowSpread(false)
, allowColor(true)
, allowStyle(prop == CSSPropertyWebkitBoxShadow || prop == CSSPropertyBoxShadow)
, allowBreak(true)
{
}
bool allowLength() { return allowX || allowY || allowBlur || allowSpread; }
void commitValue()
{
// Handle the ,, case gracefully by doing nothing.
if (x || y || blur || spread || color || style) {
if (!values)
values = CSSValueList::createCommaSeparated();
// Construct the current shadow value and add it to the list.
values->append(CSSShadowValue::create(x.release(), y.release(), blur.release(), spread.release(), style.release(), color.release()));
}
// Now reset for the next shadow value.
x = nullptr;
y = nullptr;
blur = nullptr;
spread = nullptr;
style = nullptr;
color = nullptr;
allowX = true;
allowColor = true;
allowBreak = true;
allowY = false;
allowBlur = false;
allowSpread = false;
allowStyle = property == CSSPropertyWebkitBoxShadow || property == CSSPropertyBoxShadow;
}
void commitLength(CSSParserValue* v)
{
RefPtr<CSSPrimitiveValue> val = m_parser->createPrimitiveNumericValue(v);
if (allowX) {
x = val.release();
allowX = false;
allowY = true;
allowColor = false;
allowStyle = false;
allowBreak = false;
} else if (allowY) {
y = val.release();
allowY = false;
allowBlur = true;
allowColor = true;
allowStyle = property == CSSPropertyWebkitBoxShadow || property == CSSPropertyBoxShadow;
allowBreak = true;
} else if (allowBlur) {
blur = val.release();
allowBlur = false;
allowSpread = property == CSSPropertyWebkitBoxShadow || property == CSSPropertyBoxShadow;
} else if (allowSpread) {
spread = val.release();
allowSpread = false;
}
}
void commitColor(PassRefPtr<CSSPrimitiveValue> val)
{
color = val;
allowColor = false;
if (allowX) {
allowStyle = false;
allowBreak = false;
} else {
allowBlur = false;
allowSpread = false;
allowStyle = property == CSSPropertyWebkitBoxShadow || property == CSSPropertyBoxShadow;
}
}
void commitStyle(CSSParserValue* v)
{
style = cssValuePool().createIdentifierValue(v->id);
allowStyle = false;
if (allowX)
allowBreak = false;
else {
allowBlur = false;
allowSpread = false;
allowColor = false;
}
}
CSSPropertyID property;
CSSPropertyParser* m_parser;
RefPtr<CSSValueList> values;
RefPtr<CSSPrimitiveValue> x;
RefPtr<CSSPrimitiveValue> y;
RefPtr<CSSPrimitiveValue> blur;
RefPtr<CSSPrimitiveValue> spread;
RefPtr<CSSPrimitiveValue> style;
RefPtr<CSSPrimitiveValue> color;
bool allowX;
bool allowY;
bool allowBlur;
bool allowSpread;
bool allowColor;
bool allowStyle; // inset or not.
bool allowBreak;
};
PassRefPtr<CSSValueList> CSSPropertyParser::parseShadow(CSSParserValueList* valueList, CSSPropertyID propId)
{
ShadowParseContext context(propId, this);
for (CSSParserValue* val = valueList->current(); val; val = valueList->next()) {
// Check for a comma break first.
if (val->unit == CSSParserValue::Operator) {
if (val->iValue != ',' || !context.allowBreak) {
// Other operators aren't legal or we aren't done with the current shadow
// value. Treat as invalid.
return nullptr;
}
// The value is good. Commit it.
context.commitValue();
} else if (validUnit(val, FLength, HTMLStandardMode)) {
// We required a length and didn't get one. Invalid.
if (!context.allowLength())
return nullptr;
// Blur radius must be non-negative.
if (context.allowBlur && !validUnit(val, FLength | FNonNeg, HTMLStandardMode))
return nullptr;
// A length is allowed here. Construct the value and add it.
context.commitLength(val);
} else if (val->id == CSSValueInset) {
if (!context.allowStyle)
return nullptr;
context.commitStyle(val);
} else {
// The only other type of value that's ok is a color value.
RefPtr<CSSPrimitiveValue> parsedColor = nullptr;
if (val->id == CSSValueCurrentcolor) {
if (!context.allowColor)
return nullptr;
parsedColor = cssValuePool().createIdentifierValue(val->id);
}
if (!parsedColor)
// It's not built-in. Try to parse it as a color.
parsedColor = parseColor(val);
if (!parsedColor || !context.allowColor)
return nullptr; // This value is not a color or length and is invalid or
// it is a color, but a color isn't allowed at this point.
context.commitColor(parsedColor.release());
}
}
if (context.allowBreak) {
context.commitValue();
if (context.values && context.values->length())
return context.values.release();
}
return nullptr;
}
static bool isFlexBasisMiddleArg(double flexGrow, double flexShrink, double unsetValue, int argSize)
{
return flexGrow != unsetValue && flexShrink == unsetValue && argSize == 3;
}
// TODO(ojan): Make this have reasonable defaults.
bool CSSPropertyParser::parseFlex(CSSParserValueList* args)
{
if (!args || !args->size() || args->size() > 3)
return false;
static const double unsetValue = -1;
double flexGrow = unsetValue;
double flexShrink = unsetValue;
RefPtr<CSSPrimitiveValue> flexBasis = nullptr;
while (CSSParserValue* arg = args->current()) {
if (validUnit(arg, FNumber | FNonNeg)) {
if (flexGrow == unsetValue)
flexGrow = arg->fValue;
else if (flexShrink == unsetValue)
flexShrink = arg->fValue;
else if (!arg->fValue) {
// flex only allows a basis of 0 (sans units) if flex-grow and flex-shrink values have already been set.
flexBasis = cssValuePool().createValue(0, CSSPrimitiveValue::CSS_PX);
} else {
// We only allow 3 numbers without units if the last value is 0. E.g., flex:1 1 1 is invalid.
return false;
}
} else if (!flexBasis && (arg->id == CSSValueAuto || validUnit(arg, FLength | FPercent | FNonNeg)) && !isFlexBasisMiddleArg(flexGrow, flexShrink, unsetValue, args->size()))
flexBasis = parseValidPrimitive(arg->id, arg);
else {
// Not a valid arg for flex.
return false;
}
args->next();
}
if (flexGrow == unsetValue)
flexGrow = 1;
if (flexShrink == unsetValue)
flexShrink = 1;
if (!flexBasis)
flexBasis = cssValuePool().createValue(0, CSSPrimitiveValue::CSS_PERCENTAGE);
addProperty(CSSPropertyFlexGrow, cssValuePool().createValue(clampToFloat(flexGrow), CSSPrimitiveValue::CSS_NUMBER));
addProperty(CSSPropertyFlexShrink, cssValuePool().createValue(clampToFloat(flexShrink), CSSPrimitiveValue::CSS_NUMBER));
addProperty(CSSPropertyFlexBasis, flexBasis);
return true;
}
PassRefPtr<CSSValue> CSSPropertyParser::parseObjectPosition()
{
RefPtr<CSSValue> xValue = nullptr;
RefPtr<CSSValue> yValue = nullptr;
parseFillPosition(m_valueList, xValue, yValue);
if (!xValue || !yValue)
return nullptr;
return createPrimitiveValuePair(toCSSPrimitiveValue(xValue.get()), toCSSPrimitiveValue(yValue.get()), Pair::KeepIdenticalValues);
}
bool CSSPropertyParser::parseBorderRadius(CSSPropertyID propId)
{
unsigned num = m_valueList->size();
if (num > 9)
return false;
ShorthandScope scope(this, propId);
RefPtr<CSSPrimitiveValue> radii[2][4];
#if ENABLE(OILPAN)
// Zero initialize the array of raw pointers.
memset(&radii, 0, sizeof(radii));
#endif
unsigned indexAfterSlash = 0;
for (unsigned i = 0; i < num; ++i) {
CSSParserValue* value = m_valueList->valueAt(i);
if (value->unit == CSSParserValue::Operator) {
if (value->iValue != '/')
return false;
if (!i || indexAfterSlash || i + 1 == num || num > i + 5)
return false;
indexAfterSlash = i + 1;
completeBorderRadii(radii[0]);
continue;
}
if (i - indexAfterSlash >= 4)
return false;
if (!validUnit(value, FLength | FPercent | FNonNeg))
return false;
RefPtr<CSSPrimitiveValue> radius = createPrimitiveNumericValue(value);
if (!indexAfterSlash) {
radii[0][i] = radius;
// Legacy syntax: -webkit-border-radius: l1 l2; is equivalent to border-radius: l1 / l2;
if (num == 2 && propId == CSSPropertyWebkitBorderRadius) {
indexAfterSlash = 1;
completeBorderRadii(radii[0]);
}
} else
radii[1][i - indexAfterSlash] = radius.release();
}
if (!indexAfterSlash) {
completeBorderRadii(radii[0]);
for (unsigned i = 0; i < 4; ++i)
radii[1][i] = radii[0][i];
} else
completeBorderRadii(radii[1]);
ImplicitScope implicitScope(this);
addProperty(CSSPropertyBorderTopLeftRadius, createPrimitiveValuePair(radii[0][0].release(), radii[1][0].release()));
addProperty(CSSPropertyBorderTopRightRadius, createPrimitiveValuePair(radii[0][1].release(), radii[1][1].release()));
addProperty(CSSPropertyBorderBottomRightRadius, createPrimitiveValuePair(radii[0][2].release(), radii[1][2].release()));
addProperty(CSSPropertyBorderBottomLeftRadius, createPrimitiveValuePair(radii[0][3].release(), radii[1][3].release()));
return true;
}
PassRefPtr<CSSValue> CSSPropertyParser::parseAspectRatio()
{
unsigned num = m_valueList->size();
if (num == 1 && m_valueList->valueAt(0)->id == CSSValueNone) {
m_valueList->next();
return cssValuePool().createIdentifierValue(CSSValueNone);
}
if (num != 3)
return nullptr;
CSSParserValue* lvalue = m_valueList->current();
CSSParserValue* op = m_valueList->next();
CSSParserValue* rvalue = m_valueList->next();
m_valueList->next();
if (!isForwardSlashOperator(op))
return nullptr;
if (!validUnit(lvalue, FNumber | FNonNeg) || !validUnit(rvalue, FNumber | FNonNeg))
return nullptr;
if (!lvalue->fValue || !rvalue->fValue)
return nullptr;
return CSSAspectRatioValue::create(narrowPrecisionToFloat(lvalue->fValue), narrowPrecisionToFloat(rvalue->fValue));
}
static PassRefPtr<CSSPrimitiveValue> valueFromSideKeyword(CSSParserValue* a, bool& isHorizontal)
{
if (a->unit != CSSPrimitiveValue::CSS_IDENT)
return nullptr;
switch (a->id) {
case CSSValueLeft:
case CSSValueRight:
isHorizontal = true;
break;
case CSSValueTop:
case CSSValueBottom:
isHorizontal = false;
break;
default:
return nullptr;
}
return cssValuePool().createIdentifierValue(a->id);
}
PassRefPtr<CSSPrimitiveValue> parseGradientColorOrKeyword(CSSPropertyParser* p, CSSParserValue* value)
{
CSSValueID id = value->id;
if (id == CSSValueCurrentcolor)
return cssValuePool().createIdentifierValue(id);
return p->parseColor(value);
}
bool CSSPropertyParser::parseLinearGradient(CSSParserValueList* valueList, RefPtr<CSSValue>& gradient, CSSGradientRepeat repeating)
{
RefPtr<CSSLinearGradientValue> result = CSSLinearGradientValue::create(repeating, CSSLinearGradient);
CSSParserValueList* args = valueList->current()->function->args.get();
if (!args || !args->size())
return false;
CSSParserValue* a = args->current();
if (!a)
return false;
bool expectComma = false;
// Look for angle.
if (validUnit(a, FAngle, HTMLStandardMode)) {
result->setAngle(createPrimitiveNumericValue(a));
args->next();
expectComma = true;
} else if (a->unit == CSSPrimitiveValue::CSS_IDENT && equalIgnoringCase(a, "to")) {
// to [ [left | right] || [top | bottom] ]
a = args->next();
if (!a)
return false;
RefPtr<CSSPrimitiveValue> endX = nullptr;
RefPtr<CSSPrimitiveValue> endY = nullptr;
RefPtr<CSSPrimitiveValue> location = nullptr;
bool isHorizontal = false;
location = valueFromSideKeyword(a, isHorizontal);
if (!location)
return false;
if (isHorizontal)
endX = location;
else
endY = location;
a = args->next();
if (!a)
return false;
location = valueFromSideKeyword(a, isHorizontal);
if (location) {
if (isHorizontal) {
if (endX)
return false;
endX = location;
} else {
if (endY)
return false;
endY = location;
}
args->next();
}
expectComma = true;
result->setFirstX(endX.release());
result->setFirstY(endY.release());
}
if (!parseGradientColorStops(args, result.get(), expectComma))
return false;
if (!result->stopCount())
return false;
gradient = result.release();
return true;
}
bool CSSPropertyParser::parseRadialGradient(CSSParserValueList* valueList, RefPtr<CSSValue>& gradient, CSSGradientRepeat repeating)
{
RefPtr<CSSRadialGradientValue> result = CSSRadialGradientValue::create(repeating, CSSRadialGradient);
CSSParserValueList* args = valueList->current()->function->args.get();
if (!args || !args->size())
return false;
CSSParserValue* a = args->current();
if (!a)
return false;
bool expectComma = false;
RefPtr<CSSPrimitiveValue> shapeValue = nullptr;
RefPtr<CSSPrimitiveValue> sizeValue = nullptr;
RefPtr<CSSPrimitiveValue> horizontalSize = nullptr;
RefPtr<CSSPrimitiveValue> verticalSize = nullptr;
// First part of grammar, the size/shape clause:
// [ circle || <length> ] |
// [ ellipse || [ <length> | <percentage> ]{2} ] |
// [ [ circle | ellipse] || <size-keyword> ]
for (int i = 0; i < 3; ++i) {
if (a->unit == CSSPrimitiveValue::CSS_IDENT) {
bool badIdent = false;
switch (a->id) {
case CSSValueCircle:
case CSSValueEllipse:
if (shapeValue)
return false;
shapeValue = cssValuePool().createIdentifierValue(a->id);
break;
case CSSValueClosestSide:
case CSSValueClosestCorner:
case CSSValueFarthestSide:
case CSSValueFarthestCorner:
if (sizeValue || horizontalSize)
return false;
sizeValue = cssValuePool().createIdentifierValue(a->id);
break;
default:
badIdent = true;
}
if (badIdent)
break;
a = args->next();
if (!a)
return false;
} else if (validUnit(a, FLength | FPercent)) {
if (sizeValue || horizontalSize)
return false;
horizontalSize = createPrimitiveNumericValue(a);
a = args->next();
if (!a)
return false;
if (validUnit(a, FLength | FPercent)) {
verticalSize = createPrimitiveNumericValue(a);
++i;
a = args->next();
if (!a)
return false;
}
} else
break;
}
// You can specify size as a keyword or a length/percentage, not both.
if (sizeValue && horizontalSize)
return false;
// Circles must have 0 or 1 lengths.
if (shapeValue && shapeValue->getValueID() == CSSValueCircle && verticalSize)
return false;
// Ellipses must have 0 or 2 length/percentages.
if (shapeValue && shapeValue->getValueID() == CSSValueEllipse && horizontalSize && !verticalSize)
return false;
// If there's only one size, it must be a length.
if (!verticalSize && horizontalSize && horizontalSize->isPercentage())
return false;
result->setShape(shapeValue);
result->setSizingBehavior(sizeValue);
result->setEndHorizontalSize(horizontalSize);
result->setEndVerticalSize(verticalSize);
// Second part of grammar, the center-position clause:
// at <position>
RefPtr<CSSValue> centerX = nullptr;
RefPtr<CSSValue> centerY = nullptr;
if (a->unit == CSSPrimitiveValue::CSS_IDENT && a->id == CSSValueAt) {
a = args->next();
if (!a)
return false;
parseFillPosition(args, centerX, centerY);
if (!(centerX && centerY))
return false;
a = args->current();
if (!a)
return false;
result->setFirstX(toCSSPrimitiveValue(centerX.get()));
result->setFirstY(toCSSPrimitiveValue(centerY.get()));
// Right now, CSS radial gradients have the same start and end centers.
result->setSecondX(toCSSPrimitiveValue(centerX.get()));
result->setSecondY(toCSSPrimitiveValue(centerY.get()));
}
if (shapeValue || sizeValue || horizontalSize || centerX || centerY)
expectComma = true;
if (!parseGradientColorStops(args, result.get(), expectComma))
return false;
gradient = result.release();
return true;
}
bool CSSPropertyParser::parseGradientColorStops(CSSParserValueList* valueList, CSSGradientValue* gradient, bool expectComma)
{
CSSParserValue* a = valueList->current();
// Now look for color stops.
while (a) {
// Look for the comma before the next stop.
if (expectComma) {
if (!isComma(a))
return false;
a = valueList->next();
if (!a)
return false;
}
// <color-stop> = <color> [ <percentage> | <length> ]?
CSSGradientColorStop stop;
stop.m_color = parseGradientColorOrKeyword(this, a);
if (!stop.m_color)
return false;
a = valueList->next();
if (a) {
if (validUnit(a, FLength | FPercent)) {
stop.m_position = createPrimitiveNumericValue(a);
a = valueList->next();
}
}
gradient->addStop(stop);
expectComma = true;
}
// Must have 2 or more stops to be valid.
return gradient->stopCount() >= 2;
}
bool CSSPropertyParser::parseGeneratedImage(CSSParserValueList* valueList, RefPtr<CSSValue>& value)
{
CSSParserValue* val = valueList->current();
if (val->unit != CSSParserValue::Function)
return false;
if (equalIgnoringCase(val->function->name, "linear-gradient("))
return parseLinearGradient(valueList, value, NonRepeating);
if (equalIgnoringCase(val->function->name, "repeating-linear-gradient("))
return parseLinearGradient(valueList, value, Repeating);
if (equalIgnoringCase(val->function->name, "radial-gradient("))
return parseRadialGradient(valueList, value, NonRepeating);
if (equalIgnoringCase(val->function->name, "repeating-radial-gradient("))
return parseRadialGradient(valueList, value, Repeating);
return false;
}
static void filterInfoForName(const CSSParserString& name, CSSFilterValue::FilterOperationType& filterType, unsigned& maximumArgumentCount)
{
if (equalIgnoringCase(name, "grayscale("))
filterType = CSSFilterValue::GrayscaleFilterOperation;
else if (equalIgnoringCase(name, "sepia("))
filterType = CSSFilterValue::SepiaFilterOperation;
else if (equalIgnoringCase(name, "saturate("))
filterType = CSSFilterValue::SaturateFilterOperation;
else if (equalIgnoringCase(name, "hue-rotate("))
filterType = CSSFilterValue::HueRotateFilterOperation;
else if (equalIgnoringCase(name, "invert("))
filterType = CSSFilterValue::InvertFilterOperation;
else if (equalIgnoringCase(name, "opacity("))
filterType = CSSFilterValue::OpacityFilterOperation;
else if (equalIgnoringCase(name, "brightness("))
filterType = CSSFilterValue::BrightnessFilterOperation;
else if (equalIgnoringCase(name, "contrast("))
filterType = CSSFilterValue::ContrastFilterOperation;
else if (equalIgnoringCase(name, "blur("))
filterType = CSSFilterValue::BlurFilterOperation;
else if (equalIgnoringCase(name, "drop-shadow(")) {
filterType = CSSFilterValue::DropShadowFilterOperation;
maximumArgumentCount = 4; // x-offset, y-offset, blur-radius, color -- spread and inset style not allowed.
}
}
PassRefPtr<CSSFilterValue> CSSPropertyParser::parseBuiltinFilterArguments(CSSParserValueList* args, CSSFilterValue::FilterOperationType filterType)
{
RefPtr<CSSFilterValue> filterValue = CSSFilterValue::create(filterType);
ASSERT(args);
switch (filterType) {
case CSSFilterValue::GrayscaleFilterOperation:
case CSSFilterValue::SepiaFilterOperation:
case CSSFilterValue::SaturateFilterOperation:
case CSSFilterValue::InvertFilterOperation:
case CSSFilterValue::OpacityFilterOperation:
case CSSFilterValue::ContrastFilterOperation: {
// One optional argument, 0-1 or 0%-100%, if missing use 100%.
if (args->size()) {
CSSParserValue* value = args->current();
// FIXME (crbug.com/397061): Support calc expressions like calc(10% + 0.5)
if (value->unit != CSSPrimitiveValue::CSS_PERCENTAGE && !validUnit(value, FNumber | FNonNeg))
return nullptr;
double amount = value->fValue;
if (amount < 0)
return nullptr;
// Saturate and Contrast allow values over 100%.
if (filterType != CSSFilterValue::SaturateFilterOperation
&& filterType != CSSFilterValue::ContrastFilterOperation) {
double maxAllowed = value->unit == CSSPrimitiveValue::CSS_PERCENTAGE ? 100.0 : 1.0;
if (amount > maxAllowed)
return nullptr;
}
filterValue->append(cssValuePool().createValue(amount, static_cast<CSSPrimitiveValue::UnitType>(value->unit)));
}
break;
}
case CSSFilterValue::BrightnessFilterOperation: {
// One optional argument, if missing use 100%.
if (args->size()) {
CSSParserValue* value = args->current();
// FIXME (crbug.com/397061): Support calc expressions like calc(10% + 0.5)
if (value->unit != CSSPrimitiveValue::CSS_PERCENTAGE && !validUnit(value, FNumber))
return nullptr;
filterValue->append(cssValuePool().createValue(value->fValue, static_cast<CSSPrimitiveValue::UnitType>(value->unit)));
}
break;
}
case CSSFilterValue::HueRotateFilterOperation: {
// hue-rotate() takes one optional angle.
if (args->size()) {
CSSParserValue* argument = args->current();
if (!validUnit(argument, FAngle, HTMLStandardMode))
return nullptr;
filterValue->append(createPrimitiveNumericValue(argument));
}
break;
}
case CSSFilterValue::BlurFilterOperation: {
// Blur takes a single length. Zero parameters are allowed.
if (args->size()) {
CSSParserValue* argument = args->current();
if (!validUnit(argument, FLength | FNonNeg, HTMLStandardMode))
return nullptr;
filterValue->append(createPrimitiveNumericValue(argument));
}
break;
}
case CSSFilterValue::DropShadowFilterOperation: {
// drop-shadow() takes a single shadow.
RefPtr<CSSValueList> shadowValueList = parseShadow(args, CSSPropertyFilter);
if (!shadowValueList || shadowValueList->length() != 1)
return nullptr;
filterValue->append((shadowValueList.release())->item(0));
break;
}
default:
ASSERT_NOT_REACHED();
}
return filterValue.release();
}
PassRefPtr<CSSValueList> CSSPropertyParser::parseFilter()
{
if (!m_valueList)
return nullptr;
// The filter is a list of functional primitives that specify individual operations.
RefPtr<CSSValueList> list = CSSValueList::createSpaceSeparated();
for (CSSParserValue* value = m_valueList->current(); value; value = m_valueList->next()) {
if (value->unit != CSSPrimitiveValue::CSS_URI && (value->unit != CSSParserValue::Function || !value->function))
return nullptr;
CSSFilterValue::FilterOperationType filterType = CSSFilterValue::UnknownFilterOperation;
const CSSParserString name = value->function->name;
unsigned maximumArgumentCount = 1;
filterInfoForName(name, filterType, maximumArgumentCount);
if (filterType == CSSFilterValue::UnknownFilterOperation)
return nullptr;
CSSParserValueList* args = value->function->args.get();
if (!args || args->size() > maximumArgumentCount)
return nullptr;
RefPtr<CSSFilterValue> filterValue = parseBuiltinFilterArguments(args, filterType);
if (!filterValue)
return nullptr;
list->append(filterValue);
}
return list.release();
}
PassRefPtr<CSSValueList> CSSPropertyParser::parseTransformOrigin()
{
CSSParserValue* value = m_valueList->current();
CSSValueID id = value->id;
RefPtr<CSSValue> xValue = nullptr;
RefPtr<CSSValue> yValue = nullptr;
RefPtr<CSSValue> zValue = nullptr;
if (id == CSSValueLeft || id == CSSValueRight) {
xValue = cssValuePool().createIdentifierValue(id);
} else if (id == CSSValueTop || id == CSSValueBottom) {
yValue = cssValuePool().createIdentifierValue(id);
} else if (id == CSSValueCenter) {
// Unresolved as to whether this is X or Y.
} else if (validUnit(value, FPercent | FLength)) {
xValue = createPrimitiveNumericValue(value);
} else {
return nullptr;
}
value = m_valueList->next();
if (value) {
id = value->id;
if (!xValue && (id == CSSValueLeft || id == CSSValueRight)) {
xValue = cssValuePool().createIdentifierValue(id);
} else if (!yValue && (id == CSSValueTop || id == CSSValueBottom)) {
yValue = cssValuePool().createIdentifierValue(id);
} else if (id == CSSValueCenter) {
// Resolved below.
} else if (!yValue && validUnit(value, FPercent | FLength)) {
yValue = createPrimitiveNumericValue(value);
} else {
return nullptr;
}
// If X or Y have not been resolved, they must be center.
if (!xValue)
xValue = cssValuePool().createIdentifierValue(CSSValueCenter);
if (!yValue)
yValue = cssValuePool().createIdentifierValue(CSSValueCenter);
value = m_valueList->next();
if (value) {
if (!validUnit(value, FLength))
return nullptr;
zValue = createPrimitiveNumericValue(value);
value = m_valueList->next();
if (value)
return nullptr;
}
} else if (!xValue) {
if (yValue) {
xValue = cssValuePool().createValue(50, CSSPrimitiveValue::CSS_PERCENTAGE);
} else {
xValue = cssValuePool().createIdentifierValue(CSSValueCenter);
}
}
RefPtr<CSSValueList> list = CSSValueList::createSpaceSeparated();
list->append(xValue.release());
if (yValue)
list->append(yValue.release());
if (zValue)
list->append(zValue.release());
return list.release();
}
PassRefPtr<CSSValue> CSSPropertyParser::parseTouchAction()
{
CSSParserValue* value = m_valueList->current();
RefPtr<CSSValueList> list = CSSValueList::createSpaceSeparated();
if (m_valueList->size() == 1 && value && (value->id == CSSValueAuto || value->id == CSSValueNone || value->id == CSSValueManipulation)) {
list->append(cssValuePool().createIdentifierValue(value->id));
m_valueList->next();
return list.release();
}
while (value) {
switch (value->id) {
case CSSValuePanX:
case CSSValuePanY: {
RefPtr<CSSValue> panValue = cssValuePool().createIdentifierValue(value->id);
if (list->hasValue(panValue.get()))
return nullptr;
list->append(panValue.release());
break;
}
default:
return nullptr;
}
value = m_valueList->next();
}
if (list->length())
return list.release();
return nullptr;
}
void CSSPropertyParser::addTextDecorationProperty(CSSPropertyID propId, PassRefPtr<CSSValue> value)
{
// The text-decoration-line property takes priority over text-decoration.
if (propId == CSSPropertyTextDecoration && !inShorthand()) {
for (unsigned i = 0; i < m_parsedProperties.size(); ++i) {
if (m_parsedProperties[i].id() == CSSPropertyTextDecorationLine)
return;
}
}
addProperty(propId, value);
}
bool CSSPropertyParser::parseTextDecoration(CSSPropertyID propId)
{
ASSERT(propId != CSSPropertyTextDecorationLine || RuntimeEnabledFeatures::css3TextDecorationsEnabled());
CSSParserValue* value = m_valueList->current();
if (value && value->id == CSSValueNone) {
addTextDecorationProperty(propId, cssValuePool().createIdentifierValue(CSSValueNone));
m_valueList->next();
return true;
}
RefPtr<CSSValueList> list = CSSValueList::createSpaceSeparated();
bool isValid = true;
while (isValid && value) {
switch (value->id) {
case CSSValueUnderline:
case CSSValueOverline:
case CSSValueLineThrough:
case CSSValueBlink:
list->append(cssValuePool().createIdentifierValue(value->id));
break;
default:
isValid = false;
break;
}
if (isValid)
value = m_valueList->next();
}
// Values are either valid or in shorthand scope.
if (list->length() && (isValid || inShorthand())) {
addTextDecorationProperty(propId, list.release());
return true;
}
return false;
}
bool CSSPropertyParser::parseTextUnderlinePosition()
{
// The text-underline-position property has syntax "auto | [ under || [ left | right ] ]".
// However, values 'left' and 'right' are not implemented yet, so we will parse syntax
// "auto | under" for now.
CSSParserValue* value = m_valueList->current();
switch (value->id) {
case CSSValueAuto:
case CSSValueUnder:
if (m_valueList->next())
return false;
addProperty(CSSPropertyTextUnderlinePosition, cssValuePool().createIdentifierValue(value->id));
return true;
default:
return false;
}
}
bool CSSPropertyParser::parseTextEmphasisStyle()
{
unsigned valueListSize = m_valueList->size();
RefPtr<CSSPrimitiveValue> fill = nullptr;
RefPtr<CSSPrimitiveValue> shape = nullptr;
for (CSSParserValue* value = m_valueList->current(); value; value = m_valueList->next()) {
if (value->unit == CSSPrimitiveValue::CSS_STRING) {
if (fill || shape || (valueListSize != 1 && !inShorthand()))
return false;
addProperty(CSSPropertyWebkitTextEmphasisStyle, createPrimitiveStringValue(value));
m_valueList->next();
return true;
}
if (value->id == CSSValueNone) {
if (fill || shape || (valueListSize != 1 && !inShorthand()))
return false;
addProperty(CSSPropertyWebkitTextEmphasisStyle, cssValuePool().createIdentifierValue(CSSValueNone));
m_valueList->next();
return true;
}
if (value->id == CSSValueOpen || value->id == CSSValueFilled) {
if (fill)
return false;
fill = cssValuePool().createIdentifierValue(value->id);
} else if (value->id == CSSValueDot || value->id == CSSValueCircle || value->id == CSSValueDoubleCircle || value->id == CSSValueTriangle || value->id == CSSValueSesame) {
if (shape)
return false;
shape = cssValuePool().createIdentifierValue(value->id);
} else if (!inShorthand())
return false;
else
break;
}
if (fill && shape) {
RefPtr<CSSValueList> parsedValues = CSSValueList::createSpaceSeparated();
parsedValues->append(fill.release());
parsedValues->append(shape.release());
addProperty(CSSPropertyWebkitTextEmphasisStyle, parsedValues.release());
return true;
}
if (fill) {
addProperty(CSSPropertyWebkitTextEmphasisStyle, fill.release());
return true;
}
if (shape) {
addProperty(CSSPropertyWebkitTextEmphasisStyle, shape.release());
return true;
}
return false;
}
PassRefPtr<CSSValue> CSSPropertyParser::parseTextIndent()
{
RefPtr<CSSValueList> list = CSSValueList::createSpaceSeparated();
bool hasLengthOrPercentage = false;
bool hasEachLine = false;
bool hasHanging = false;
for (CSSParserValue* value = m_valueList->current(); value; value = m_valueList->next()) {
// <length> | <percentage> | inherit when RuntimeEnabledFeatures::css3TextEnabled() returns false
if (!hasLengthOrPercentage && validUnit(value, FLength | FPercent)) {
list->append(createPrimitiveNumericValue(value));
hasLengthOrPercentage = true;
continue;
}
// [ <length> | <percentage> ] && hanging? && each-line? | inherit
// when RuntimeEnabledFeatures::css3TextEnabled() returns true
if (RuntimeEnabledFeatures::css3TextEnabled()) {
if (!hasEachLine && value->id == CSSValueEachLine) {
list->append(cssValuePool().createIdentifierValue(CSSValueEachLine));
hasEachLine = true;
continue;
}
if (!hasHanging && value->id == CSSValueHanging) {
list->append(cssValuePool().createIdentifierValue(CSSValueHanging));
hasHanging = true;
continue;
}
}
return nullptr;
}
if (!hasLengthOrPercentage)
return nullptr;
return list.release();
}
bool CSSPropertyParser::parseLineBoxContain()
{
LineBoxContain lineBoxContain = LineBoxContainNone;
for (CSSParserValue* value = m_valueList->current(); value; value = m_valueList->next()) {
LineBoxContainFlags flag;
if (value->id == CSSValueBlock) {
flag = LineBoxContainBlock;
} else if (value->id == CSSValueInline) {
flag = LineBoxContainInline;
} else if (value->id == CSSValueFont) {
flag = LineBoxContainFont;
} else if (value->id == CSSValueGlyphs) {
flag = LineBoxContainGlyphs;
} else if (value->id == CSSValueReplaced) {
flag = LineBoxContainReplaced;
} else if (value->id == CSSValueInlineBox) {
flag = LineBoxContainInlineBox;
} else {
return false;
}
if (lineBoxContain & flag)
return false;
lineBoxContain |= flag;
}
if (!lineBoxContain)
return false;
addProperty(CSSPropertyWebkitLineBoxContain, CSSLineBoxContainValue::create(lineBoxContain));
return true;
}
bool CSSPropertyParser::parseFontFeatureTag(CSSValueList* settings)
{
// Feature tag name consists of 4-letter characters.
static const unsigned tagNameLength = 4;
CSSParserValue* value = m_valueList->current();
// Feature tag name comes first
if (value->unit != CSSPrimitiveValue::CSS_STRING)
return false;
if (value->string.length() != tagNameLength)
return false;
for (unsigned i = 0; i < tagNameLength; ++i) {
// Limits the range of characters to 0x20-0x7E, following the tag name rules defiend in the OpenType specification.
UChar character = value->string[i];
if (character < 0x20 || character > 0x7E)
return false;
}
AtomicString tag = value->string;
int tagValue = 1;
// Feature tag values could follow: <integer> | on | off
value = m_valueList->next();
if (value) {
if (value->unit == CSSPrimitiveValue::CSS_NUMBER && value->isInt && value->fValue >= 0) {
tagValue = clampToInteger(value->fValue);
if (tagValue < 0)
return false;
m_valueList->next();
} else if (value->id == CSSValueOn || value->id == CSSValueOff) {
tagValue = value->id == CSSValueOn;
m_valueList->next();
}
}
settings->append(CSSFontFeatureValue::create(tag, tagValue));
return true;
}
bool CSSPropertyParser::parseFontFeatureSettings()
{
if (m_valueList->size() == 1 && m_valueList->current()->id == CSSValueNormal) {
RefPtr<CSSPrimitiveValue> normalValue = cssValuePool().createIdentifierValue(CSSValueNormal);
m_valueList->next();
addProperty(CSSPropertyWebkitFontFeatureSettings, normalValue.release());
return true;
}
RefPtr<CSSValueList> settings = CSSValueList::createCommaSeparated();
while (true) {
if (!m_valueList->current() || !parseFontFeatureTag(settings.get()))
return false;
if (!m_valueList->current())
break;
if (!consumeComma(m_valueList))
return false;
}
addProperty(CSSPropertyWebkitFontFeatureSettings, settings.release());
return true;
}
bool CSSPropertyParser::parseFontVariantLigatures()
{
RefPtr<CSSValueList> ligatureValues = CSSValueList::createSpaceSeparated();
bool sawCommonLigaturesValue = false;
bool sawDiscretionaryLigaturesValue = false;
bool sawHistoricalLigaturesValue = false;
bool sawContextualLigaturesValue = false;
for (CSSParserValue* value = m_valueList->current(); value; value = m_valueList->next()) {
if (value->unit != CSSPrimitiveValue::CSS_IDENT)
return false;
switch (value->id) {
case CSSValueNoCommonLigatures:
case CSSValueCommonLigatures:
if (sawCommonLigaturesValue)
return false;
sawCommonLigaturesValue = true;
ligatureValues->append(cssValuePool().createIdentifierValue(value->id));
break;
case CSSValueNoDiscretionaryLigatures:
case CSSValueDiscretionaryLigatures:
if (sawDiscretionaryLigaturesValue)
return false;
sawDiscretionaryLigaturesValue = true;
ligatureValues->append(cssValuePool().createIdentifierValue(value->id));
break;
case CSSValueNoHistoricalLigatures:
case CSSValueHistoricalLigatures:
if (sawHistoricalLigaturesValue)
return false;
sawHistoricalLigaturesValue = true;
ligatureValues->append(cssValuePool().createIdentifierValue(value->id));
break;
case CSSValueNoContextual:
case CSSValueContextual:
if (sawContextualLigaturesValue)
return false;
sawContextualLigaturesValue = true;
ligatureValues->append(cssValuePool().createIdentifierValue(value->id));
break;
default:
return false;
}
}
if (!ligatureValues->length())
return false;
addProperty(CSSPropertyFontVariantLigatures, ligatureValues.release());
return true;
}
bool CSSPropertyParser::parseCalculation(CSSParserValue* value, ValueRange range)
{
ASSERT(isCalculation(value));
CSSParserValueList* args = value->function->args.get();
if (!args || !args->size())
return false;
ASSERT(!m_parsedCalculation);
m_parsedCalculation = CSSCalcValue::create(value->function->name, args, range);
if (!m_parsedCalculation)
return false;
return true;
}
bool CSSPropertyParser::parseViewportProperty(CSSPropertyID propId)
{
ASSERT(RuntimeEnabledFeatures::cssViewportEnabled() || isUASheetBehavior(m_context.mode()));
CSSParserValue* value = m_valueList->current();
if (!value)
return false;
CSSValueID id = value->id;
bool validPrimitive = false;
switch (propId) {
case CSSPropertyMinWidth: // auto | <length> | <percentage>
case CSSPropertyMaxWidth:
case CSSPropertyMinHeight:
case CSSPropertyMaxHeight:
if (id == CSSValueAuto)
validPrimitive = true;
else
validPrimitive = (!id && validUnit(value, FLength | FPercent | FNonNeg));
break;
case CSSPropertyWidth: // shorthand
return parseViewportShorthand(propId, CSSPropertyMinWidth, CSSPropertyMaxWidth);
case CSSPropertyHeight:
return parseViewportShorthand(propId, CSSPropertyMinHeight, CSSPropertyMaxHeight);
case CSSPropertyOrientation: // auto | portrait | landscape
if (id == CSSValueAuto || id == CSSValuePortrait || id == CSSValueLandscape)
validPrimitive = true;
default:
break;
}
RefPtr<CSSValue> parsedValue = nullptr;
if (validPrimitive) {
parsedValue = parseValidPrimitive(id, value);
m_valueList->next();
}
if (parsedValue) {
if (!m_valueList->current() || inShorthand()) {
addProperty(propId, parsedValue.release());
return true;
}
}
return false;
}
bool CSSPropertyParser::parseViewportShorthand(CSSPropertyID propId, CSSPropertyID first, CSSPropertyID second)
{
ASSERT(RuntimeEnabledFeatures::cssViewportEnabled() || isUASheetBehavior(m_context.mode()));
unsigned numValues = m_valueList->size();
if (numValues > 2)
return false;
ShorthandScope scope(this, propId);
if (!parseViewportProperty(first))
return false;
// If just one value is supplied, the second value
// is implicitly initialized with the first value.
if (numValues == 1)
m_valueList->previous();
return parseViewportProperty(second);
}
template <typename CharacterType>
static CSSPropertyID cssPropertyID(const CharacterType* propertyName, unsigned length)
{
char buffer[maxCSSPropertyNameLength + 1]; // 1 for null character
for (unsigned i = 0; i != length; ++i) {
CharacterType c = propertyName[i];
if (c == 0 || c >= 0x7F)
return CSSPropertyInvalid; // illegal character
buffer[i] = toASCIILower(c);
}
buffer[length] = '\0';
const char* name = buffer;
const Property* hashTableEntry = findProperty(name, length);
if (!hashTableEntry)
return CSSPropertyInvalid;
CSSPropertyID property = static_cast<CSSPropertyID>(hashTableEntry->id);
if (!CSSPropertyMetadata::isEnabledProperty(property))
return CSSPropertyInvalid;
return property;
}
CSSPropertyID cssPropertyID(const String& 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);
}
CSSPropertyID cssPropertyID(const CSSParserString& 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);
}
template <typename CharacterType>
static CSSValueID cssValueKeywordID(const CharacterType* valueKeyword, unsigned length)
{
char buffer[maxCSSValueKeywordLength + 1]; // 1 for null character
for (unsigned i = 0; i != length; ++i) {
CharacterType c = valueKeyword[i];
if (c == 0 || c >= 0x7F)
return CSSValueInvalid; // illegal character
buffer[i] = WTF::toASCIILower(c);
}
buffer[length] = '\0';
const Value* hashTableEntry = findValue(buffer, length);
return hashTableEntry ? static_cast<CSSValueID>(hashTableEntry->id) : CSSValueInvalid;
}
CSSValueID cssValueKeywordID(const CSSParserString& 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);
}
bool isValidNthToken(const CSSParserString& token)
{
// The tokenizer checks for the construct of an+b.
// However, since the {ident} rule precedes the {nth} rule, some of those
// tokens are identified as string literal. Furthermore we need to accept
// "odd" and "even" which does not match to an+b.
return equalIgnoringCase(token, "odd") || equalIgnoringCase(token, "even")
|| equalIgnoringCase(token, "n") || equalIgnoringCase(token, "-n");
}
bool CSSPropertyParser::isSystemColor(int id)
{
// FIXME(sky): remove
return false;
}
} // namespace blink