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chromium / chromium / src / 3d6b5d3df0a988475328dc5a4aabce5c4f4aa211 / . / third_party / WebKit / Source / core / css / parser / LegacyCSSPropertyParser.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 "core/css/parser/CSSPropertyParser.h"
#include "core/StylePropertyShorthand.h"
#include "core/css/CSSCrossfadeValue.h"
#include "core/css/CSSCustomIdentValue.h"
#include "core/css/CSSFunctionValue.h"
#include "core/css/CSSGridLineNamesValue.h"
#include "core/css/CSSImageSetValue.h"
#include "core/css/CSSPrimitiveValueMappings.h"
#include "core/css/CSSValuePair.h"
#include "core/css/CSSValuePool.h"
#include "core/css/parser/CSSParserValues.h"
#include "core/frame/UseCounter.h"
#include "core/style/GridArea.h"
#include "platform/RuntimeEnabledFeatures.h"
namespace blink {
void CSSPropertyParser::addProperty(CSSPropertyID propId, PassRefPtrWillBeRawPtr<CSSValue> value, bool important, bool implicit)
{
ASSERT(!isPropertyAlias(propId));
int shorthandIndex = 0;
bool setFromShorthand = false;
if (m_currentShorthand) {
Vector<StylePropertyShorthand, 4> shorthands;
getMatchingShorthandsForLonghand(propId, &shorthands);
setFromShorthand = true;
if (shorthands.size() > 1)
shorthandIndex = indexOfShorthandForLonghand(m_currentShorthand, shorthands);
}
m_parsedProperties.append(CSSProperty(propId, value, important, setFromShorthand, shorthandIndex, m_implicitShorthand || implicit));
}
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 UnitType::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->calcFunction;
value->setUnit(CSSPrimitiveValue::UnitType::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 for certain properties and presentation attributes accept unit-less values for certain units.
return (unitflags & (FLength | FAngle))
&& (!value->fValue // 0 can always be unitless.
|| isUnitLessLengthParsingEnabledForMode(cssParserMode) // HTML and SVG attribute values can always be unitless.
|| (cssParserMode == HTMLQuirksMode && (unitflags & FUnitlessQuirk)));
}
inline bool isCalculation(CSSParserValue* value)
{
return value->m_unit == CSSParserValue::CalcFunction;
}
bool CSSPropertyParser::validUnit(CSSParserValue* value, Units unitflags, CSSParserMode cssParserMode, ReleaseParsedCalcValueCondition releaseCalc)
{
if (isCalculation(value))
return validCalculationUnit(value, unitflags, releaseCalc);
if (unitflags & FNonNeg && value->fValue < 0)
return false;
switch (value->unit()) {
case CSSPrimitiveValue::UnitType::Number:
if (unitflags & FNumber)
return true;
if (shouldAcceptUnitLessValues(value, unitflags, cssParserMode)) {
value->setUnit((unitflags & FLength) ? CSSPrimitiveValue::UnitType::Pixels : CSSPrimitiveValue::UnitType::Degrees);
return true;
}
if ((unitflags & FInteger) && value->isInt)
return true;
if ((unitflags & FPositiveInteger) && value->isInt && value->fValue > 0)
return true;
return false;
case CSSPrimitiveValue::UnitType::Percentage:
return unitflags & FPercent;
case CSSPrimitiveValue::UnitType::QuirkyEms:
if (cssParserMode != UASheetMode)
return false;
/* fallthrough intentional */
case CSSPrimitiveValue::UnitType::Ems:
case CSSPrimitiveValue::UnitType::Rems:
case CSSPrimitiveValue::UnitType::Chs:
case CSSPrimitiveValue::UnitType::Exs:
case CSSPrimitiveValue::UnitType::Pixels:
case CSSPrimitiveValue::UnitType::Centimeters:
case CSSPrimitiveValue::UnitType::Millimeters:
case CSSPrimitiveValue::UnitType::Inches:
case CSSPrimitiveValue::UnitType::Points:
case CSSPrimitiveValue::UnitType::Picas:
case CSSPrimitiveValue::UnitType::UserUnits:
case CSSPrimitiveValue::UnitType::ViewportWidth:
case CSSPrimitiveValue::UnitType::ViewportHeight:
case CSSPrimitiveValue::UnitType::ViewportMin:
case CSSPrimitiveValue::UnitType::ViewportMax:
return unitflags & FLength;
case CSSPrimitiveValue::UnitType::Milliseconds:
case CSSPrimitiveValue::UnitType::Seconds:
return unitflags & FTime;
case CSSPrimitiveValue::UnitType::Degrees:
case CSSPrimitiveValue::UnitType::Radians:
case CSSPrimitiveValue::UnitType::Gradians:
case CSSPrimitiveValue::UnitType::Turns:
return unitflags & FAngle;
case CSSPrimitiveValue::UnitType::DotsPerPixel:
case CSSPrimitiveValue::UnitType::DotsPerInch:
case CSSPrimitiveValue::UnitType::DotsPerCentimeter:
return unitflags & FResolution;
default:
return false;
}
}
PassRefPtrWillBeRawPtr<CSSPrimitiveValue> CSSPropertyParser::createPrimitiveNumericValue(CSSParserValue* value)
{
if (m_parsedCalculation) {
ASSERT(isCalculation(value));
return CSSPrimitiveValue::create(m_parsedCalculation.release());
}
ASSERT((value->unit() >= CSSPrimitiveValue::UnitType::Number && value->unit() <= CSSPrimitiveValue::UnitType::Kilohertz)
|| (value->unit() >= CSSPrimitiveValue::UnitType::Turns && value->unit() <= CSSPrimitiveValue::UnitType::Chs)
|| (value->unit() >= CSSPrimitiveValue::UnitType::ViewportWidth && value->unit() <= CSSPrimitiveValue::UnitType::ViewportMax)
|| (value->unit() >= CSSPrimitiveValue::UnitType::DotsPerPixel && value->unit() <= CSSPrimitiveValue::UnitType::DotsPerCentimeter));
return cssValuePool().createValue(value->fValue, value->unit());
}
inline PassRefPtrWillBeRawPtr<CSSCustomIdentValue> CSSPropertyParser::createPrimitiveCustomIdentValue(CSSParserValue* value)
{
ASSERT(value->m_unit == CSSParserValue::String || value->m_unit == CSSParserValue::Identifier);
return CSSCustomIdentValue::create(value->string);
}
static inline bool isComma(CSSParserValue* value)
{
ASSERT(value);
return value->m_unit == CSSParserValue::Operator && value->iValue == ',';
}
static bool consumeComma(CSSParserValueList* valueList)
{
CSSParserValue* value = valueList->current();
if (!value || !isComma(value))
return false;
valueList->next();
return true;
}
static inline bool isForwardSlashOperator(CSSParserValue* value)
{
ASSERT(value);
return value->m_unit == CSSParserValue::Operator && value->iValue == '/';
}
void CSSPropertyParser::addExpandedPropertyForValue(CSSPropertyID propId, PassRefPtrWillBeRawPtr<CSSValue> prpValue, bool important)
{
const StylePropertyShorthand& shorthand = shorthandForProperty(propId);
unsigned shorthandLength = shorthand.length();
if (!shorthandLength) {
addProperty(propId, prpValue, important);
return;
}
RefPtrWillBeRawPtr<CSSValue> value = prpValue;
ShorthandScope scope(this, propId);
const CSSPropertyID* longhands = shorthand.properties();
for (unsigned i = 0; i < shorthandLength; ++i)
addProperty(longhands[i], value, important);
}
bool CSSPropertyParser::legacyParseAndApplyValue(CSSPropertyID propertyID, bool important)
{
RefPtrWillBeRawPtr<CSSValue> result = legacyParseValue(propertyID);
if (!result)
return false;
addProperty(propertyID, result.release(), important);
return true;
}
PassRefPtrWillBeRawPtr<CSSValue> CSSPropertyParser::legacyParseValue(CSSPropertyID unresolvedProperty)
{
CSSPropertyID propId = resolveCSSPropertyID(unresolvedProperty);
// 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);
RefPtrWillBeRawPtr<CSSValue> parsedValue = nullptr;
switch (propId) {
case CSSPropertyBackgroundColor: // <color> | inherit
parsedValue = parseColor(m_valueList->current(), inQuirksMode() && !inShorthand());
if (parsedValue)
m_valueList->next();
break;
case CSSPropertyBackgroundBlendMode:
case CSSPropertyBackgroundAttachment:
case CSSPropertyBackgroundClip:
case CSSPropertyWebkitBackgroundClip:
case CSSPropertyWebkitBackgroundComposite:
case CSSPropertyBackgroundImage:
case CSSPropertyBackgroundOrigin:
case CSSPropertyMaskSourceType:
case CSSPropertyWebkitBackgroundOrigin:
case CSSPropertyBackgroundPositionX:
case CSSPropertyBackgroundPositionY:
case CSSPropertyBackgroundSize:
case CSSPropertyWebkitMaskClip:
case CSSPropertyWebkitMaskComposite:
case CSSPropertyWebkitMaskImage:
case CSSPropertyWebkitMaskOrigin:
case CSSPropertyWebkitMaskPositionX:
case CSSPropertyWebkitMaskPositionY:
case CSSPropertyWebkitMaskSize:
case CSSPropertyWebkitMaskRepeatX:
case CSSPropertyWebkitMaskRepeatY:
{
RefPtrWillBeRawPtr<CSSValue> dummyValue = nullptr;
CSSPropertyID propId1, propId2;
if (!parseFillProperty(unresolvedProperty, propId1, propId2, parsedValue, dummyValue))
return nullptr;
ASSERT(!dummyValue);
break;
}
case CSSPropertyJustifySelf:
ASSERT(RuntimeEnabledFeatures::cssGridLayoutEnabled());
parsedValue = parseItemPositionOverflowPosition();
break;
case CSSPropertyJustifyItems:
ASSERT(RuntimeEnabledFeatures::cssGridLayoutEnabled());
if ((parsedValue = parseLegacyPosition()))
break;
m_valueList->setCurrentIndex(0);
parsedValue = parseItemPositionOverflowPosition();
break;
case CSSPropertyGridAutoFlow:
ASSERT(RuntimeEnabledFeatures::cssGridLayoutEnabled());
parsedValue = parseGridAutoFlow(*m_valueList);
break;
case CSSPropertyGridAutoColumns:
case CSSPropertyGridAutoRows:
ASSERT(RuntimeEnabledFeatures::cssGridLayoutEnabled());
parsedValue = parseGridTrackSize(*m_valueList);
break;
case CSSPropertyGridTemplateColumns:
case CSSPropertyGridTemplateRows:
ASSERT(RuntimeEnabledFeatures::cssGridLayoutEnabled());
parsedValue = parseGridTrackList();
break;
case CSSPropertyGridColumnEnd:
case CSSPropertyGridColumnStart:
case CSSPropertyGridRowEnd:
case CSSPropertyGridRowStart:
ASSERT(RuntimeEnabledFeatures::cssGridLayoutEnabled());
parsedValue = parseGridPosition();
break;
case CSSPropertyGridTemplateAreas:
ASSERT(RuntimeEnabledFeatures::cssGridLayoutEnabled());
parsedValue = parseGridTemplateAreas();
break;
break;
case CSSPropertyAlignSelf:
ASSERT(RuntimeEnabledFeatures::cssGridLayoutEnabled());
parsedValue = parseItemPositionOverflowPosition();
break;
case CSSPropertyAlignItems:
ASSERT(RuntimeEnabledFeatures::cssGridLayoutEnabled());
parsedValue = parseItemPositionOverflowPosition();
break;
// Everything else is handled in CSSPropertyParser.cpp
default:
return nullptr;
}
ASSERT(!m_parsedCalculation);
if (parsedValue) {
if (!m_valueList->current() || inShorthand())
return parsedValue.release();
}
return nullptr;
}
bool CSSPropertyParser::legacyParseShorthand(CSSPropertyID propertyID, bool important)
{
switch (propertyID) {
case CSSPropertyBackgroundPosition:
case CSSPropertyBackgroundRepeat:
case CSSPropertyWebkitMaskPosition:
case CSSPropertyWebkitMaskRepeat: {
RefPtrWillBeRawPtr<CSSValue> val1 = nullptr;
RefPtrWillBeRawPtr<CSSValue> val2 = nullptr;
CSSPropertyID propId1, propId2;
if (parseFillProperty(propertyID, propId1, propId2, val1, val2)) {
ShorthandScope scope(this, propertyID);
addProperty(propId1, val1.release(), important);
if (val2)
addProperty(propId2, val2.release(), important);
m_implicitShorthand = false;
return true;
}
m_implicitShorthand = false;
return true;
}
case CSSPropertyGridGap:
ASSERT(RuntimeEnabledFeatures::cssGridLayoutEnabled());
return parseGridGapShorthand(important);
case CSSPropertyGridColumn:
case CSSPropertyGridRow:
ASSERT(RuntimeEnabledFeatures::cssGridLayoutEnabled());
return parseGridItemPositionShorthand(propertyID, important);
case CSSPropertyGridArea:
ASSERT(RuntimeEnabledFeatures::cssGridLayoutEnabled());
return parseGridAreaShorthand(important);
case CSSPropertyGridTemplate:
ASSERT(RuntimeEnabledFeatures::cssGridLayoutEnabled());
return parseGridTemplateShorthand(important);
case CSSPropertyGrid:
ASSERT(RuntimeEnabledFeatures::cssGridLayoutEnabled());
return parseGridShorthand(important);
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(propertyID, properties, WTF_ARRAY_LENGTH(properties), important);
}
case CSSPropertyWebkitMask: {
const CSSPropertyID properties[] = { CSSPropertyWebkitMaskImage, CSSPropertyWebkitMaskRepeat,
CSSPropertyWebkitMaskPosition, CSSPropertyWebkitMaskOrigin, CSSPropertyWebkitMaskClip, CSSPropertyWebkitMaskSize };
return parseFillShorthand(propertyID, properties, WTF_ARRAY_LENGTH(properties), important);
}
// The remaining shorthands are handled in CSSPropertyParser.cpp
default:
return false;
}
}
void CSSPropertyParser::addFillValue(RefPtrWillBeRawPtr<CSSValue>& lval, PassRefPtrWillBeRawPtr<CSSValue> rval)
{
if (lval) {
if (lval->isBaseValueList())
toCSSValueList(lval.get())->append(rval);
else {
PassRefPtrWillBeRawPtr<CSSValue> oldlVal(lval.release());
PassRefPtrWillBeRawPtr<CSSValueList> list = CSSValueList::createCommaSeparated();
list->append(oldlVal);
list->append(rval);
lval = list;
}
}
else
lval = rval;
}
static bool parseBackgroundClip(CSSParserValue* parserValue, RefPtrWillBeRawPtr<CSSValue>& cssValue)
{
if (parserValue->id == CSSValueBorderBox || parserValue->id == CSSValuePaddingBox
|| parserValue->id == CSSValueContentBox || parserValue->id == CSSValueWebkitText) {
cssValue = cssValuePool().createIdentifierValue(parserValue->id);
return true;
}
return false;
}
const int cMaxFillProperties = 9;
bool CSSPropertyParser::parseFillShorthand(CSSPropertyID propId, const CSSPropertyID* properties, int numProperties, bool important)
{
ASSERT(numProperties <= cMaxFillProperties);
if (numProperties > cMaxFillProperties)
return false;
ShorthandScope scope(this, propId);
bool parsedProperty[cMaxFillProperties] = { false };
RefPtrWillBeRawPtr<CSSValue> values[cMaxFillProperties];
#if ENABLE(OILPAN)
// Zero initialize the array of raw pointers.
memset(&values, 0, sizeof(values));
#endif
RefPtrWillBeRawPtr<CSSValue> clipValue = nullptr;
RefPtrWillBeRawPtr<CSSValue> positionYValue = nullptr;
RefPtrWillBeRawPtr<CSSValue> repeatYValue = nullptr;
bool foundClip = false;
int i;
bool foundPositionCSSProperty = false;
while (m_valueList->current()) {
CSSParserValue* val = m_valueList->current();
if (isComma(val)) {
// 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 || properties[i] == CSSPropertyWebkitMaskPosition)
addFillValue(positionYValue, cssValuePool().createImplicitInitialValue());
if (properties[i] == CSSPropertyBackgroundRepeat || properties[i] == CSSPropertyWebkitMaskRepeat)
addFillValue(repeatYValue, cssValuePool().createImplicitInitialValue());
if ((properties[i] == CSSPropertyBackgroundOrigin || properties[i] == CSSPropertyWebkitMaskOrigin) && !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 && properties[i] != CSSPropertyWebkitMaskSize))
continue;
if (!sizeCSSPropertyExpected && (properties[i] == CSSPropertyBackgroundSize || properties[i] == CSSPropertyWebkitMaskSize))
continue;
if (!parsedProperty[i]) {
RefPtrWillBeRawPtr<CSSValue> val1 = nullptr;
RefPtrWillBeRawPtr<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 (parserValue && parseFillProperty(properties[i], propId1, propId2, val1, val2)) {
parsedProperty[i] = found = true;
addFillValue(values[i], val1.release());
if (properties[i] == CSSPropertyBackgroundPosition || properties[i] == CSSPropertyWebkitMaskPosition)
addFillValue(positionYValue, val2.release());
if (properties[i] == CSSPropertyBackgroundRepeat || properties[i] == CSSPropertyWebkitMaskRepeat)
addFillValue(repeatYValue, val2.release());
if (properties[i] == CSSPropertyBackgroundOrigin || properties[i] == CSSPropertyWebkitMaskOrigin) {
// 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 || properties[i] == CSSPropertyWebkitMaskClip) {
// Update clipValue
addFillValue(clipValue, val1.release());
foundClip = true;
}
if (properties[i] == CSSPropertyBackgroundPosition || properties[i] == CSSPropertyWebkitMaskPosition)
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 || properties[i] == CSSPropertyWebkitMaskPosition)
addFillValue(positionYValue, cssValuePool().createImplicitInitialValue());
if (properties[i] == CSSPropertyBackgroundRepeat || properties[i] == CSSPropertyWebkitMaskRepeat)
addFillValue(repeatYValue, cssValuePool().createImplicitInitialValue());
if (properties[i] == CSSPropertyBackgroundOrigin || properties[i] == CSSPropertyWebkitMaskOrigin) {
// If background-origin wasn't present, then reset background-clip also.
addFillValue(clipValue, cssValuePool().createImplicitInitialValue());
}
}
if (properties[i] == CSSPropertyBackgroundPosition) {
addProperty(CSSPropertyBackgroundPositionX, values[i].release(), important);
// it's OK to call positionYValue.release() since we only see CSSPropertyBackgroundPosition once
addProperty(CSSPropertyBackgroundPositionY, positionYValue.release(), important);
} else if (properties[i] == CSSPropertyWebkitMaskPosition) {
addProperty(CSSPropertyWebkitMaskPositionX, values[i].release(), important);
// it's OK to call positionYValue.release() since we only see CSSPropertyWebkitMaskPosition once
addProperty(CSSPropertyWebkitMaskPositionY, positionYValue.release(), important);
} else if (properties[i] == CSSPropertyBackgroundRepeat) {
addProperty(CSSPropertyBackgroundRepeatX, values[i].release(), important);
// it's OK to call repeatYValue.release() since we only see CSSPropertyBackgroundPosition once
addProperty(CSSPropertyBackgroundRepeatY, repeatYValue.release(), important);
} else if (properties[i] == CSSPropertyWebkitMaskRepeat) {
addProperty(CSSPropertyWebkitMaskRepeatX, values[i].release(), important);
// it's OK to call repeatYValue.release() since we only see CSSPropertyBackgroundPosition once
addProperty(CSSPropertyWebkitMaskRepeatY, repeatYValue.release(), important);
} else if ((properties[i] == CSSPropertyBackgroundClip || properties[i] == CSSPropertyWebkitMaskClip) && !foundClip)
// Value is already set while updating origin
continue;
else if (properties[i] == CSSPropertyBackgroundSize && !parsedProperty[i] && m_context.useLegacyBackgroundSizeShorthandBehavior())
continue;
else
addProperty(properties[i], values[i].release(), important);
// Add in clip values when we hit the corresponding origin property.
if (properties[i] == CSSPropertyBackgroundOrigin && !foundClip)
addProperty(CSSPropertyBackgroundClip, clipValue.release(), important);
else if (properties[i] == CSSPropertyWebkitMaskOrigin && !foundClip)
addProperty(CSSPropertyWebkitMaskClip, clipValue.release(), important);
}
m_implicitShorthand = false;
return true;
}
PassRefPtrWillBeRawPtr<CSSValue> CSSPropertyParser::parseColor(const CSSParserValue* value, bool acceptQuirkyColors)
{
CSSValueID id = value->id;
if (isColorKeyword(id)) {
if (!isValueAllowedInMode(id, m_context.mode()))
return nullptr;
if (id == CSSValueWebkitText && m_context.useCounter())
m_context.useCounter()->count(UseCounter::WebkitTextInColorProperty);
return cssValuePool().createIdentifierValue(id);
}
RGBA32 c = Color::transparent;
if (!parseColorFromValue(value, c, acceptQuirkyColors))
return nullptr;
return cssValuePool().createColorValue(c);
}
bool CSSPropertyParser::parseFillImage(CSSParserValueList* valueList, RefPtrWillBeRawPtr<CSSValue>& value)
{
if (valueList->current()->id == CSSValueNone) {
value = cssValuePool().createIdentifierValue(CSSValueNone);
return true;
}
if (valueList->current()->m_unit == CSSParserValue::URI) {
value = createCSSImageValueWithReferrer(valueList->current()->string, m_context);
return true;
}
if (valueList->current()->m_unit == CSSParserValue::Function) {
if (CSSPropertyParser::isGeneratedImage(valueList->current()->function->id))
return parseGeneratedImage(valueList, value);
if (valueList->current()->function->id == CSSValueWebkitImageSet) {
value = parseImageSet(m_valueList);
if (value)
return true;
}
}
return false;
}
PassRefPtrWillBeRawPtr<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::UnitType::Percentage);
}
if (validUnit(valueList->current(), FPercent | FLength))
return createPrimitiveNumericValue(valueList->current());
return nullptr;
}
PassRefPtrWillBeRawPtr<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::UnitType::Percentage);
}
if (validUnit(valueList->current(), FPercent | FLength))
return createPrimitiveNumericValue(valueList->current());
return nullptr;
}
PassRefPtrWillBeRawPtr<CSSPrimitiveValue> CSSPropertyParser::parseFillPositionComponent(CSSParserValueList* valueList, unsigned& cumulativeFlags, FillPositionFlag& individualFlag, FillPositionParsingMode parsingMode, Units unitless)
{
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::UnitType::Percentage);
}
if (validUnit(valueList->current(), FPercent | FLength | unitless)) {
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, RefPtrWillBeRawPtr<CSSValue>& value1, RefPtrWillBeRawPtr<CSSValue>& value2, PassRefPtrWillBeRawPtr<CSSPrimitiveValue> parsedValue1, PassRefPtrWillBeRawPtr<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;
RefPtrWillBeRawPtr<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;
RefPtrWillBeRawPtr<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 = CSSValuePair::create(parsedValue1, parsedValue2, CSSValuePair::DropIdenticalValues);
value2 = CSSValuePair::create(value3, value4, CSSValuePair::DropIdenticalValues);
if (ident1 == CSSValueTop || ident1 == CSSValueBottom)
value1.swap(value2);
valueList->next();
}
void CSSPropertyParser::parse3ValuesFillPosition(CSSParserValueList* valueList, RefPtrWillBeRawPtr<CSSValue>& value1, RefPtrWillBeRawPtr<CSSValue>& value2, PassRefPtrWillBeRawPtr<CSSPrimitiveValue> parsedValue1, PassRefPtrWillBeRawPtr<CSSPrimitiveValue> parsedValue2)
{
unsigned cumulativeFlags = 0;
FillPositionFlag value3Flag = InvalidFillPosition;
RefPtrWillBeRawPtr<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 = CSSValuePair::create(cssValuePool().createIdentifierValue(firstPositionKeyword), cssValuePool().createValue(50, CSSPrimitiveValue::UnitType::Percentage), CSSValuePair::DropIdenticalValues);
value2 = CSSValuePair::create(parsedValue2, value3, CSSValuePair::DropIdenticalValues);
} else if (ident3 == CSSValueCenter) {
if (isFillPositionKeyword(ident2))
return;
secondPositionKeyword = CSSValueTop;
if (ident1 == CSSValueTop || ident1 == CSSValueBottom) {
secondPositionKeyword = CSSValueLeft;
swapNeeded = true;
}
value1 = CSSValuePair::create(parsedValue1, parsedValue2, CSSValuePair::DropIdenticalValues);
value2 = CSSValuePair::create(cssValuePool().createIdentifierValue(secondPositionKeyword), cssValuePool().createValue(50, CSSPrimitiveValue::UnitType::Percentage), CSSValuePair::DropIdenticalValues);
} else {
RefPtrWillBeRawPtr<CSSPrimitiveValue> firstPositionValue = nullptr;
RefPtrWillBeRawPtr<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::UnitType::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::UnitType::Percentage);
}
if (isValueConflictingWithCurrentEdge(ident1, secondPositionKeyword))
return;
value1 = CSSValuePair::create(parsedValue1, firstPositionValue, CSSValuePair::DropIdenticalValues);
value2 = CSSValuePair::create(cssValuePool().createIdentifierValue(secondPositionKeyword), secondPositionValue, CSSValuePair::DropIdenticalValues);
}
if (ident1 == CSSValueTop || ident1 == CSSValueBottom || swapNeeded)
value1.swap(value2);
#if ENABLE(ASSERT)
const CSSValuePair& first = toCSSValuePair(*value1);
const CSSValuePair& second = toCSSValuePair(*value2);
ident1 = toCSSPrimitiveValue(first.first()).getValueID();
ident2 = toCSSPrimitiveValue(second.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, RefPtrWillBeRawPtr<CSSValue>& value1, RefPtrWillBeRawPtr<CSSValue>& value2, Units unitless)
{
unsigned numberOfValues = 0;
for (unsigned i = valueList->currentIndex(); i < valueList->size(); ++i, ++numberOfValues) {
CSSParserValue* current = valueList->valueAt(i);
if (!current || isComma(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, unitless);
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;
}
RefPtrWillBeRawPtr<CSSPrimitiveValue> parsedValue1 = toCSSPrimitiveValue(value1.get());
RefPtrWillBeRawPtr<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, RefPtrWillBeRawPtr<CSSValue>& value1, RefPtrWillBeRawPtr<CSSValue>& value2, Units unitless)
{
// 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, ResolveValuesAsPercent, unitless);
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 (value && isComma(value))
value = 0;
if (value) {
value2 = parseFillPositionComponent(valueList, cumulativeFlags, value2Flag, ResolveValuesAsPercent, unitless);
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::UnitType::Percentage);
}
if (value1Flag == YFillPosition || value2Flag == XFillPosition)
value1.swap(value2);
}
void CSSPropertyParser::parseFillRepeat(RefPtrWillBeRawPtr<CSSValue>& value1, RefPtrWillBeRawPtr<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());
}
PassRefPtrWillBeRawPtr<CSSValue> CSSPropertyParser::parseFillSize(CSSPropertyID unresolvedProperty)
{
CSSParserValue* value = m_valueList->current();
m_valueList->next();
if (value->id == CSSValueContain || value->id == CSSValueCover)
return cssValuePool().createIdentifierValue(value->id);
RefPtrWillBeRawPtr<CSSPrimitiveValue> parsedValue1 = nullptr;
if (value->id == CSSValueAuto)
parsedValue1 = cssValuePool().createIdentifierValue(CSSValueAuto);
else {
if (!validUnit(value, FLength | FPercent))
return nullptr;
parsedValue1 = createPrimitiveNumericValue(value);
}
RefPtrWillBeRawPtr<CSSPrimitiveValue> parsedValue2 = nullptr;
value = m_valueList->current();
if (value) {
if (value->id == CSSValueAuto) {
// `auto' is the default
m_valueList->next();
} else if (validUnit(value, FLength | FPercent)) {
parsedValue2 = createPrimitiveNumericValue(value);
m_valueList->next();
}
} else if (unresolvedProperty == CSSPropertyAliasWebkitBackgroundSize) {
// 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. It should be safe to let masks match
// the real property.
parsedValue2 = parsedValue1;
}
if (!parsedValue2)
return parsedValue1;
return CSSValuePair::create(parsedValue1.release(), parsedValue2.release(), CSSValuePair::KeepIdenticalValues);
}
bool CSSPropertyParser::parseFillProperty(CSSPropertyID propId, CSSPropertyID& propId1, CSSPropertyID& propId2,
RefPtrWillBeRawPtr<CSSValue>& retValue1, RefPtrWillBeRawPtr<CSSValue>& retValue2)
{
// We initially store the first value in value/value2, and only create
// CSSValueLists if we have more values.
RefPtrWillBeRawPtr<CSSValueList> values = nullptr;
RefPtrWillBeRawPtr<CSSValueList> values2 = nullptr;
RefPtrWillBeRawPtr<CSSValue> value = nullptr;
RefPtrWillBeRawPtr<CSSValue> value2 = nullptr;
retValue1 = retValue2 = nullptr;
propId1 = resolveCSSPropertyID(propId);
propId2 = propId1;
if (propId == CSSPropertyBackgroundPosition) {
propId1 = CSSPropertyBackgroundPositionX;
propId2 = CSSPropertyBackgroundPositionY;
} else if (propId == CSSPropertyWebkitMaskPosition) {
propId1 = CSSPropertyWebkitMaskPositionX;
propId2 = CSSPropertyWebkitMaskPositionY;
} else if (propId == CSSPropertyBackgroundRepeat) {
propId1 = CSSPropertyBackgroundRepeatX;
propId2 = CSSPropertyBackgroundRepeatY;
} else if (propId == CSSPropertyWebkitMaskRepeat) {
propId1 = CSSPropertyWebkitMaskRepeatX;
propId2 = CSSPropertyWebkitMaskRepeatY;
}
while (true) {
RefPtrWillBeRawPtr<CSSValue> currValue = nullptr;
RefPtrWillBeRawPtr<CSSValue> currValue2 = nullptr;
Units unitless = FUnknown;
CSSParserValue* val = m_valueList->current();
ASSERT(val);
switch (propId) {
case CSSPropertyBackgroundColor:
currValue = parseColor(val);
if (currValue)
m_valueList->next();
break;
case CSSPropertyBackgroundAttachment:
if (val->id == CSSValueScroll || val->id == CSSValueFixed || val->id == CSSValueLocal) {
currValue = cssValuePool().createIdentifierValue(val->id);
m_valueList->next();
}
break;
case CSSPropertyBackgroundImage:
case CSSPropertyWebkitMaskImage:
if (parseFillImage(m_valueList, currValue))
m_valueList->next();
break;
case CSSPropertyWebkitBackgroundClip:
case CSSPropertyWebkitBackgroundOrigin:
case CSSPropertyWebkitMaskClip:
case CSSPropertyWebkitMaskOrigin:
// 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 || propId == CSSPropertyWebkitMaskClip)
&& (val->id == CSSValueText || val->id == CSSValueWebkitText))) {
if (val->id == CSSValueWebkitText && m_context.useCounter())
m_context.useCounter()->count(UseCounter::WebkitTextInClipProperty);
currValue = cssValuePool().createIdentifierValue(val->id);
m_valueList->next();
}
break;
case CSSPropertyBackgroundClip:
if (parseBackgroundClip(val, currValue)) {
if (val->id == CSSValueWebkitText && m_context.useCounter())
m_context.useCounter()->count(UseCounter::WebkitTextInClipProperty);
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:
if (!inShorthand())
unitless = FUnitlessQuirk;
// fall-through
case CSSPropertyWebkitMaskPosition:
parseFillPosition(m_valueList, currValue, currValue2, unitless);
// parseFillPosition advances the m_valueList pointer.
break;
case CSSPropertyBackgroundPositionX:
case CSSPropertyWebkitMaskPositionX: {
currValue = parseFillPositionX(m_valueList);
if (currValue)
m_valueList->next();
break;
}
case CSSPropertyBackgroundPositionY:
case CSSPropertyWebkitMaskPositionY: {
currValue = parseFillPositionY(m_valueList);
if (currValue)
m_valueList->next();
break;
}
case CSSPropertyWebkitBackgroundComposite:
case CSSPropertyWebkitMaskComposite:
if (val->id >= CSSValueClear && val->id <= CSSValuePlusLighter) {
currValue = cssValuePool().createIdentifierValue(val->id);
m_valueList->next();
}
break;
case CSSPropertyBackgroundBlendMode:
if (val->id == CSSValueNormal || val->id == CSSValueMultiply
|| val->id == CSSValueScreen || val->id == CSSValueOverlay || val->id == CSSValueDarken
|| val->id == CSSValueLighten || val->id == CSSValueColorDodge || val->id == CSSValueColorBurn
|| val->id == CSSValueHardLight || val->id == CSSValueSoftLight || val->id == CSSValueDifference
|| val->id == CSSValueExclusion || val->id == CSSValueHue || val->id == CSSValueSaturation
|| val->id == CSSValueColor || val->id == CSSValueLuminosity) {
currValue = cssValuePool().createIdentifierValue(val->id);
m_valueList->next();
}
break;
case CSSPropertyBackgroundRepeat:
case CSSPropertyWebkitMaskRepeat:
parseFillRepeat(currValue, currValue2);
// parseFillRepeat advances the m_valueList pointer
break;
case CSSPropertyBackgroundSize:
case CSSPropertyAliasWebkitBackgroundSize:
case CSSPropertyWebkitMaskSize: {
currValue = parseFillSize(propId);
break;
}
case CSSPropertyMaskSourceType: {
ASSERT(RuntimeEnabledFeatures::cssMaskSourceTypeEnabled());
if (val->id == CSSValueAuto || val->id == CSSValueAlpha || val->id == CSSValueLuminance) {
currValue = cssValuePool().createIdentifierValue(val->id);
m_valueList->next();
} else {
currValue = nullptr;
}
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 (!m_valueList->current())
break;
if (!consumeComma(m_valueList) || !m_valueList->current())
return false;
}
if (values) {
ASSERT(values->length());
retValue1 = values.release();
if (values2) {
ASSERT(values2->length());
retValue2 = values2.release();
}
} else {
ASSERT(value);
retValue1 = value.release();
retValue2 = value2.release();
}
return true;
}
static inline bool isCSSWideKeyword(const CSSParserValue& value)
{
return value.id == CSSValueInitial || value.id == CSSValueInherit || value.id == CSSValueUnset || value.id == CSSValueDefault;
}
static inline bool isValidCustomIdentForGridPositions(const CSSParserValue& value)
{
// FIXME: we need a more general solution for <custom-ident> in all properties.
return value.m_unit == CSSParserValue::Identifier && value.id != CSSValueSpan && value.id != CSSValueAuto && !isCSSWideKeyword(value);
}
// The function parses [ <integer> || <custom-ident> ] in <grid-line> (which can be stand alone or with 'span').
bool CSSPropertyParser::parseIntegerOrCustomIdentFromGridPosition(RefPtrWillBeRawPtr<CSSPrimitiveValue>& numericValue, RefPtrWillBeRawPtr<CSSCustomIdentValue>& gridLineName)
{
CSSParserValue* value = m_valueList->current();
if (validUnit(value, FInteger) && value->fValue) {
numericValue = createPrimitiveNumericValue(value);
value = m_valueList->next();
if (value && isValidCustomIdentForGridPositions(*value)) {
gridLineName = createPrimitiveCustomIdentValue(m_valueList->current());
m_valueList->next();
}
return true;
}
if (isValidCustomIdentForGridPositions(*value)) {
gridLineName = createPrimitiveCustomIdentValue(m_valueList->current());
value = m_valueList->next();
if (value && validUnit(value, FInteger) && value->fValue) {
numericValue = createPrimitiveNumericValue(value);
m_valueList->next();
}
return true;
}
return false;
}
PassRefPtrWillBeRawPtr<CSSValue> CSSPropertyParser::parseGridPosition()
{
ASSERT(RuntimeEnabledFeatures::cssGridLayoutEnabled());
CSSParserValue* value = m_valueList->current();
if (value->id == CSSValueAuto) {
m_valueList->next();
return cssValuePool().createIdentifierValue(CSSValueAuto);
}
RefPtrWillBeRawPtr<CSSPrimitiveValue> numericValue = nullptr;
RefPtrWillBeRawPtr<CSSCustomIdentValue> gridLineName = nullptr;
bool hasSeenSpanKeyword = false;
if (parseIntegerOrCustomIdentFromGridPosition(numericValue, gridLineName)) {
value = m_valueList->current();
if (value && value->id == CSSValueSpan) {
hasSeenSpanKeyword = true;
m_valueList->next();
}
} else if (value->id == CSSValueSpan) {
hasSeenSpanKeyword = true;
if (CSSParserValue* nextValue = m_valueList->next()) {
if (!isForwardSlashOperator(nextValue) && !parseIntegerOrCustomIdentFromGridPosition(numericValue, gridLineName))
return nullptr;
}
}
// Check that we have consumed all the value list. For shorthands, the parser will pass
// the whole value list (including the opposite position).
if (m_valueList->current() && !isForwardSlashOperator(m_valueList->current()))
return nullptr;
// If we didn't parse anything, this is not a valid grid position.
if (!hasSeenSpanKeyword && !gridLineName && !numericValue)
return nullptr;
// Negative numbers are not allowed for span (but are for <integer>).
if (hasSeenSpanKeyword && numericValue && numericValue->getIntValue() < 0)
return nullptr;
// For the <custom-ident> case.
if (gridLineName && !numericValue && !hasSeenSpanKeyword)
return CSSCustomIdentValue::create(gridLineName->value());
RefPtrWillBeRawPtr<CSSValueList> values = CSSValueList::createSpaceSeparated();
if (hasSeenSpanKeyword)
values->append(cssValuePool().createIdentifierValue(CSSValueSpan));
if (numericValue)
values->append(numericValue.release());
if (gridLineName)
values->append(gridLineName.release());
ASSERT(values->length());
return values.release();
}
static PassRefPtrWillBeRawPtr<CSSValue> gridMissingGridPositionValue(CSSValue* value)
{
if (value->isCustomIdentValue())
return value;
return cssValuePool().createIdentifierValue(CSSValueAuto);
}
bool CSSPropertyParser::parseGridItemPositionShorthand(CSSPropertyID shorthandId, bool important)
{
ShorthandScope scope(this, shorthandId);
const StylePropertyShorthand& shorthand = shorthandForProperty(shorthandId);
ASSERT(shorthand.length() == 2);
RefPtrWillBeRawPtr<CSSValue> startValue = parseGridPosition();
if (!startValue)
return false;
RefPtrWillBeRawPtr<CSSValue> endValue = nullptr;
if (m_valueList->current()) {
if (!isForwardSlashOperator(m_valueList->current()))
return false;
if (!m_valueList->next())
return false;
endValue = parseGridPosition();
if (!endValue || m_valueList->current())
return false;
} else {
endValue = gridMissingGridPositionValue(startValue.get());
}
addProperty(shorthand.properties()[0], startValue, important);
addProperty(shorthand.properties()[1], endValue, important);
return true;
}
bool CSSPropertyParser::parseGridGapShorthand(bool important)
{
ShorthandScope scope(this, CSSPropertyGridGap);
ASSERT(shorthandForProperty(CSSPropertyGridGap).length() == 2);
CSSParserValue* value = m_valueList->current();
if (!value)
return false;
if (!validUnit(value, FLength | FNonNeg))
return false;
RefPtrWillBeRawPtr<CSSPrimitiveValue> columnGap = createPrimitiveNumericValue(value);
RefPtrWillBeRawPtr<CSSPrimitiveValue> rowGap = nullptr;
value = m_valueList->next();
if (value) {
if (!validUnit(value, FLength | FNonNeg))
return false;
rowGap = createPrimitiveNumericValue(value);
if (m_valueList->next())
return false;
} else {
rowGap = columnGap;
}
addProperty(CSSPropertyGridColumnGap, columnGap, important);
addProperty(CSSPropertyGridRowGap, rowGap, important);
return true;
}
PassRefPtrWillBeRawPtr<CSSValue> CSSPropertyParser::parseGridTemplateColumns(bool important)
{
if (!(m_valueList->current() && isForwardSlashOperator(m_valueList->current()) && m_valueList->next()))
return nullptr;
if (RefPtrWillBeRawPtr<CSSValue> columnsValue = parseGridTrackList()) {
if (m_valueList->current())
return nullptr;
return columnsValue;
}
return nullptr;
}
bool CSSPropertyParser::parseGridTemplateRowsAndAreasAndColumns(bool important)
{
NamedGridAreaMap gridAreaMap;
size_t rowCount = 0;
size_t columnCount = 0;
bool trailingIdentWasAdded = false;
RefPtrWillBeRawPtr<CSSValueList> templateRows = CSSValueList::createSpaceSeparated();
// At least template-areas strings must be defined.
if (!m_valueList->current() || isForwardSlashOperator(m_valueList->current()))
return false;
while (m_valueList->current() && !isForwardSlashOperator(m_valueList->current())) {
// Handle leading <custom-ident>*.
if (!parseGridLineNames(*m_valueList, *templateRows, trailingIdentWasAdded ? toCSSGridLineNamesValue(templateRows->item(templateRows->length() - 1)) : nullptr))
return false;
// Handle a template-area's row.
if (!parseGridTemplateAreasRow(gridAreaMap, rowCount, columnCount))
return false;
++rowCount;
// Handle template-rows's track-size.
if (m_valueList->current() && !isForwardSlashOperator(m_valueList->current()) && m_valueList->current()->m_unit != CSSParserValue::String) {
RefPtrWillBeRawPtr<CSSValue> value = parseGridTrackSize(*m_valueList);
if (!value)
return false;
templateRows->append(value);
} else {
templateRows->append(cssValuePool().createIdentifierValue(CSSValueAuto));
}
// This will handle the trailing/leading <custom-ident>* in the grammar.
if (!parseGridLineNames(*m_valueList, *templateRows))
return false;
trailingIdentWasAdded = templateRows->item(templateRows->length() - 1)->isGridLineNamesValue();
}
RefPtrWillBeRawPtr<CSSValue> columnsValue = nullptr;
if (m_valueList->current()) {
ASSERT(isForwardSlashOperator(m_valueList->current()));
columnsValue = parseGridTemplateColumns(important);
if (!columnsValue)
return false;
// The template-columns <track-list> can't be 'none'.
if (columnsValue->isPrimitiveValue() && toCSSPrimitiveValue(*columnsValue).getValueID() == CSSValueNone)
return false;
}
addProperty(CSSPropertyGridTemplateRows, templateRows.release(), important);
addProperty(CSSPropertyGridTemplateColumns, columnsValue ? columnsValue.release() : cssValuePool().createIdentifierValue(CSSValueNone), important);
RefPtrWillBeRawPtr<CSSValue> templateAreas = CSSGridTemplateAreasValue::create(gridAreaMap, rowCount, columnCount);
addProperty(CSSPropertyGridTemplateAreas, templateAreas.release(), important);
return true;
}
bool CSSPropertyParser::parseGridTemplateShorthand(bool important)
{
ASSERT(RuntimeEnabledFeatures::cssGridLayoutEnabled());
ShorthandScope scope(this, CSSPropertyGridTemplate);
ASSERT(gridTemplateShorthand().length() == 3);
// At least "none" must be defined.
if (!m_valueList->current())
return false;
bool firstValueIsNone = m_valueList->current()->id == CSSValueNone;
// 1- 'none' case.
if (firstValueIsNone && !m_valueList->next()) {
addProperty(CSSPropertyGridTemplateColumns, cssValuePool().createIdentifierValue(CSSValueNone), important);
addProperty(CSSPropertyGridTemplateRows, cssValuePool().createIdentifierValue(CSSValueNone), important);
addProperty(CSSPropertyGridTemplateAreas, cssValuePool().createIdentifierValue(CSSValueNone), important);
return true;
}
// 2- <grid-template-rows> / <grid-template-columns>
RefPtrWillBeRawPtr<CSSValue> rowsValue = nullptr;
if (firstValueIsNone) {
rowsValue = cssValuePool().createIdentifierValue(CSSValueNone);
} else {
rowsValue = parseGridTrackList();
}
if (rowsValue) {
RefPtrWillBeRawPtr<CSSValue> columnsValue = parseGridTemplateColumns(important);
if (!columnsValue)
return false;
addProperty(CSSPropertyGridTemplateRows, rowsValue.release(), important);
addProperty(CSSPropertyGridTemplateColumns, columnsValue.release(), important);
addProperty(CSSPropertyGridTemplateAreas, cssValuePool().createIdentifierValue(CSSValueNone), important);
return true;
}
// 3- [<line-names>? <string> [<track-size> <line-names>]? ]+ syntax.
// It requires to rewind parsing due to previous syntax failures.
m_valueList->setCurrentIndex(0);
return parseGridTemplateRowsAndAreasAndColumns(important);
}
bool CSSPropertyParser::parseGridShorthand(bool important)
{
ShorthandScope scope(this, CSSPropertyGrid);
ASSERT(shorthandForProperty(CSSPropertyGrid).length() == 8);
// 1- <grid-template>
if (parseGridTemplateShorthand(important)) {
// It can only be specified the explicit or the implicit grid properties in a single grid declaration.
// The sub-properties not specified are set to their initial value, as normal for shorthands.
addProperty(CSSPropertyGridAutoFlow, cssValuePool().createImplicitInitialValue(), important);
addProperty(CSSPropertyGridAutoColumns, cssValuePool().createImplicitInitialValue(), important);
addProperty(CSSPropertyGridAutoRows, cssValuePool().createImplicitInitialValue(), important);
addProperty(CSSPropertyGridColumnGap, cssValuePool().createImplicitInitialValue(), important);
addProperty(CSSPropertyGridRowGap, cssValuePool().createImplicitInitialValue(), important);
return true;
}
// Need to rewind parsing to explore the alternative syntax of this shorthand.
m_valueList->setCurrentIndex(0);
// 2- <grid-auto-flow> [ <grid-auto-columns> [ / <grid-auto-rows> ]? ]
if (!legacyParseAndApplyValue(CSSPropertyGridAutoFlow, important))
return false;
RefPtrWillBeRawPtr<CSSValue> autoColumnsValue = nullptr;
RefPtrWillBeRawPtr<CSSValue> autoRowsValue = nullptr;
if (m_valueList->current()) {
autoColumnsValue = parseGridTrackSize(*m_valueList);
if (!autoColumnsValue)
return false;
if (m_valueList->current()) {
if (!isForwardSlashOperator(m_valueList->current()) || !m_valueList->next())
return false;
autoRowsValue = parseGridTrackSize(*m_valueList);
if (!autoRowsValue)
return false;
}
if (m_valueList->current())
return false;
} else {
// Other omitted values are set to their initial values.
autoColumnsValue = cssValuePool().createImplicitInitialValue();
autoRowsValue = cssValuePool().createImplicitInitialValue();
}
// if <grid-auto-rows> value is omitted, it is set to the value specified for grid-auto-columns.
if (!autoRowsValue)
autoRowsValue = autoColumnsValue;
addProperty(CSSPropertyGridAutoColumns, autoColumnsValue, important);
addProperty(CSSPropertyGridAutoRows, autoRowsValue, important);
// It can only be specified the explicit or the implicit grid properties in a single grid declaration.
// The sub-properties not specified are set to their initial value, as normal for shorthands.
addProperty(CSSPropertyGridTemplateColumns, cssValuePool().createImplicitInitialValue(), important);
addProperty(CSSPropertyGridTemplateRows, cssValuePool().createImplicitInitialValue(), important);
addProperty(CSSPropertyGridTemplateAreas, cssValuePool().createImplicitInitialValue(), important);
addProperty(CSSPropertyGridColumnGap, cssValuePool().createImplicitInitialValue(), important);
addProperty(CSSPropertyGridRowGap, cssValuePool().createImplicitInitialValue(), important);
return true;
}
bool CSSPropertyParser::parseGridAreaShorthand(bool important)
{
ASSERT(RuntimeEnabledFeatures::cssGridLayoutEnabled());
ShorthandScope scope(this, CSSPropertyGridArea);
const StylePropertyShorthand& shorthand = gridAreaShorthand();
ASSERT_UNUSED(shorthand, shorthand.length() == 4);
RefPtrWillBeRawPtr<CSSValue> rowStartValue = parseGridPosition();
if (!rowStartValue)
return false;
RefPtrWillBeRawPtr<CSSValue> columnStartValue = nullptr;
if (!parseSingleGridAreaLonghand(columnStartValue))
return false;
RefPtrWillBeRawPtr<CSSValue> rowEndValue = nullptr;
if (!parseSingleGridAreaLonghand(rowEndValue))
return false;
RefPtrWillBeRawPtr<CSSValue> columnEndValue = nullptr;
if (!parseSingleGridAreaLonghand(columnEndValue))
return false;
if (!columnStartValue)
columnStartValue = gridMissingGridPositionValue(rowStartValue.get());
if (!rowEndValue)
rowEndValue = gridMissingGridPositionValue(rowStartValue.get());
if (!columnEndValue)
columnEndValue = gridMissingGridPositionValue(columnStartValue.get());
addProperty(CSSPropertyGridRowStart, rowStartValue, important);
addProperty(CSSPropertyGridColumnStart, columnStartValue, important);
addProperty(CSSPropertyGridRowEnd, rowEndValue, important);
addProperty(CSSPropertyGridColumnEnd, columnEndValue, important);
return true;
}
bool CSSPropertyParser::parseSingleGridAreaLonghand(RefPtrWillBeRawPtr<CSSValue>& property)
{
if (!m_valueList->current())
return true;
if (!isForwardSlashOperator(m_valueList->current()))
return false;
if (!m_valueList->next())
return false;
property = parseGridPosition();
return true;
}
static inline bool isClosingBracket(const CSSParserValue& value)
{
return value.m_unit == CSSParserValue::Operator && value.iValue == ']';
}
bool CSSPropertyParser::parseGridLineNames(CSSParserValueList& inputList, CSSValueList& valueList, CSSGridLineNamesValue* previousNamedAreaTrailingLineNames)
{
if (!inputList.current() || inputList.current()->m_unit != CSSParserValue::Operator || inputList.current()->iValue != '[')
return true;
// Skip '['
inputList.next();
RefPtrWillBeRawPtr<CSSGridLineNamesValue> lineNames = previousNamedAreaTrailingLineNames;
if (!lineNames)
lineNames = CSSGridLineNamesValue::create();
while (CSSParserValue* identValue = inputList.current()) {
if (isClosingBracket(*identValue))
break;
if (!isValidCustomIdentForGridPositions(*identValue))
return false;
RefPtrWillBeRawPtr<CSSCustomIdentValue> lineName = createPrimitiveCustomIdentValue(identValue);
lineNames->append(lineName.release());
inputList.next();
}
if (!inputList.current() || !isClosingBracket(*inputList.current()))
return false;
if (!previousNamedAreaTrailingLineNames)
valueList.append(lineNames.release());
// Consume ']'
inputList.next();
return true;
}
PassRefPtrWillBeRawPtr<CSSValue> CSSPropertyParser::parseGridTrackList()
{
ASSERT(RuntimeEnabledFeatures::cssGridLayoutEnabled());
CSSParserValue* value = m_valueList->current();
if (value->id == CSSValueNone) {
m_valueList->next();
return cssValuePool().createIdentifierValue(CSSValueNone);
}
RefPtrWillBeRawPtr<CSSValueList> values = CSSValueList::createSpaceSeparated();
// Handle leading <custom-ident>*.
if (!parseGridLineNames(*m_valueList, *values))
return nullptr;
bool seenTrackSizeOrRepeatFunction = false;
bool seenAutoRepeat = false;
while (CSSParserValue* currentValue = m_valueList->current()) {
if (isForwardSlashOperator(currentValue))
break;
if (currentValue->m_unit == CSSParserValue::Function && currentValue->function->id == CSSValueRepeat) {
bool isAutoRepeat;
if (!parseGridTrackRepeatFunction(*values, isAutoRepeat))
return nullptr;
if (isAutoRepeat && seenAutoRepeat)
return nullptr;
seenTrackSizeOrRepeatFunction = true;
seenAutoRepeat = seenAutoRepeat || isAutoRepeat;
} else {
RefPtrWillBeRawPtr<CSSValue> value = parseGridTrackSize(*m_valueList, seenAutoRepeat ? FixedSizeOnly : AllowAll);
if (!value)
return nullptr;
values->append(value);
seenTrackSizeOrRepeatFunction = true;
}
// This will handle the trailing <custom-ident>* in the grammar.
if (!parseGridLineNames(*m_valueList, *values))
return nullptr;
}
// We should have found a <track-size> or else it is not a valid <track-list>
if (!seenTrackSizeOrRepeatFunction)
return nullptr;
// <auto-repeat> requires definite minimum track sizes in order to compute the number of repetitions.
// The above while loop detects those appearances after the <auto-repeat> but not the ones before.
if (seenAutoRepeat) {
for (auto value : *values) {
if (value->isGridLineNamesValue())
continue;
ASSERT(value->isPrimitiveValue() || (value->isFunctionValue() && toCSSFunctionValue(*value).item(0)));
const CSSPrimitiveValue& primitiveValue = value->isPrimitiveValue()
? toCSSPrimitiveValue(*value)
: toCSSPrimitiveValue(*toCSSFunctionValue(*value).item(0));
CSSValueID valueID = primitiveValue.getValueID();
if (valueID == CSSValueMinContent || valueID == CSSValueMaxContent || valueID == CSSValueAuto || primitiveValue.isFlex())
return nullptr;
}
}
return values;
}
bool CSSPropertyParser::parseGridTrackRepeatFunction(CSSValueList& list, bool& isAutoRepeat)
{
CSSParserValueList* arguments = m_valueList->current()->function->args.get();
if (!arguments || arguments->size() < 3 || !isComma(arguments->valueAt(1)))
return false;
CSSParserValue* currentValue = arguments->valueAt(0);
isAutoRepeat = currentValue->id == CSSValueAutoFill || currentValue->id == CSSValueAutoFit;
if (!isAutoRepeat && !validUnit(currentValue, FPositiveInteger))
return false;
// The number of repetitions for <auto-repeat> is not important at parsing level
// because it will be computed later, let's set it to 1.
size_t repetitions = isAutoRepeat ? 1 : clampTo<size_t>(currentValue->fValue, 0, kGridMaxTracks);
RefPtrWillBeRawPtr<CSSValueList> repeatedValues = CSSValueList::createSpaceSeparated();
arguments->next(); // Skip the repetition count.
arguments->next(); // Skip the comma.
// Handle leading <custom-ident>*.
if (!parseGridLineNames(*arguments, *repeatedValues))
return false;
size_t numberOfTracks = 0;
TrackSizeRestriction restriction = isAutoRepeat ? FixedSizeOnly : AllowAll;
while (arguments->current()) {
if (isAutoRepeat && numberOfTracks)
return false;
RefPtrWillBeRawPtr<CSSValue> trackSize = parseGridTrackSize(*arguments, restriction);
if (!trackSize)
return false;
repeatedValues->append(trackSize);
++numberOfTracks;
// This takes care of any trailing <custom-ident>* in the grammar.
if (!parseGridLineNames(*arguments, *repeatedValues))
return false;
}
// We should have found at least one <track-size> or else it is not a valid <track-list>.
if (!numberOfTracks)
return false;
// We clamp the number of repetitions to a multiple of the repeat() track list's size, while staying below the max
// grid size.
repetitions = std::min(repetitions, kGridMaxTracks / numberOfTracks);
for (size_t i = 0; i < repetitions; ++i) {
for (size_t j = 0; j < repeatedValues->length(); ++j)
list.append(repeatedValues->item(j));
}
// parseGridTrackSize iterated over the repeat arguments, move to the next value.
m_valueList->next();
return true;
}
PassRefPtrWillBeRawPtr<CSSValue> CSSPropertyParser::parseGridTrackSize(CSSParserValueList& inputList, TrackSizeRestriction restriction)
{
ASSERT(RuntimeEnabledFeatures::cssGridLayoutEnabled());
CSSParserValue* currentValue = inputList.current();
inputList.next();
if (currentValue->id == CSSValueAuto)
return restriction == AllowAll ? cssValuePool().createIdentifierValue(CSSValueAuto) : nullptr;
if (currentValue->m_unit == CSSParserValue::Function && currentValue->function->id == CSSValueMinmax) {
// The spec defines the following grammar: minmax( <track-breadth> , <track-breadth> )
CSSParserValueList* arguments = currentValue->function->args.get();
if (!arguments || arguments->size() != 3 || !isComma(arguments->valueAt(1)))
return nullptr;
RefPtrWillBeRawPtr<CSSPrimitiveValue> minTrackBreadth = parseGridBreadth(arguments->valueAt(0), restriction);
if (!minTrackBreadth)
return nullptr;
RefPtrWillBeRawPtr<CSSPrimitiveValue> maxTrackBreadth = parseGridBreadth(arguments->valueAt(2));
if (!maxTrackBreadth)
return nullptr;
RefPtrWillBeRawPtr<CSSFunctionValue> result = CSSFunctionValue::create(CSSValueMinmax);
result->append(minTrackBreadth);
result->append(maxTrackBreadth);
return result.release();
}
return parseGridBreadth(currentValue, restriction);
}
PassRefPtrWillBeRawPtr<CSSPrimitiveValue> CSSPropertyParser::parseGridBreadth(CSSParserValue* currentValue, TrackSizeRestriction restriction)
{
if (currentValue->id == CSSValueMinContent || currentValue->id == CSSValueMaxContent || currentValue->id == CSSValueAuto)
return restriction == AllowAll ? cssValuePool().createIdentifierValue(currentValue->id) : nullptr;
if (currentValue->unit() == CSSPrimitiveValue::UnitType::Fraction) {
if (restriction == FixedSizeOnly)
return nullptr;
double flexValue = currentValue->fValue;
// Fractional unit is a non-negative dimension.
if (flexValue < 0)
return nullptr;
return cssValuePool().createValue(flexValue, CSSPrimitiveValue::UnitType::Fraction);
}
if (!validUnit(currentValue, FNonNeg | FLength | FPercent))
return nullptr;
return createPrimitiveNumericValue(currentValue);
}
static Vector<String> parseGridTemplateAreasColumnNames(const String& gridRowNames)
{
ASSERT(!gridRowNames.isEmpty());
Vector<String> columnNames;
// Using StringImpl to avoid checks and indirection in every call to String::operator[].
StringImpl& text = *gridRowNames.impl();
StringBuilder areaName;
for (unsigned i = 0; i < text.length(); ++i) {
if (text[i] == ' ') {
if (!areaName.isEmpty()) {
columnNames.append(areaName.toString());
areaName.clear();
}
continue;
}
if (text[i] == '.') {
if (areaName == ".")
continue;
if (!areaName.isEmpty()) {
columnNames.append(areaName.toString());
areaName.clear();
}
} else {
if (areaName == ".") {
columnNames.append(areaName.toString());
areaName.clear();
}
}
areaName.append(text[i]);
}
if (!areaName.isEmpty())
columnNames.append(areaName.toString());
return columnNames;
}
bool CSSPropertyParser::parseGridTemplateAreasRow(NamedGridAreaMap& gridAreaMap, const size_t rowCount, size_t& columnCount)
{
CSSParserValue* currentValue = m_valueList->current();
if (!currentValue || currentValue->m_unit != CSSParserValue::String)
return false;
String gridRowNames = currentValue->string;
if (gridRowNames.isEmpty() || gridRowNames.containsOnlyWhitespace())
return false;
Vector<String> columnNames = parseGridTemplateAreasColumnNames(gridRowNames);
if (!columnCount) {
columnCount = columnNames.size();
ASSERT(columnCount);
} else if (columnCount != columnNames.size()) {
// The declaration is invalid is all the rows don't have the number of columns.
return false;
}
for (size_t currentCol = 0; currentCol < columnCount; ++currentCol) {
const String& gridAreaName = columnNames[currentCol];
// Unamed areas are always valid (we consider them to be 1x1).
if (gridAreaName == ".")
continue;
// We handle several grid areas with the same name at once to simplify the validation code.
size_t lookAheadCol;
for (lookAheadCol = currentCol + 1; lookAheadCol < columnCount; ++lookAheadCol) {
if (columnNames[lookAheadCol] != gridAreaName)
break;
}
NamedGridAreaMap::iterator gridAreaIt = gridAreaMap.find(gridAreaName);
if (gridAreaIt == gridAreaMap.end()) {
gridAreaMap.add(gridAreaName, GridArea(GridSpan::translatedDefiniteGridSpan(rowCount, rowCount + 1), GridSpan::translatedDefiniteGridSpan(currentCol, lookAheadCol)));
} else {
GridArea& gridArea = gridAreaIt->value;
// The following checks test that the grid area is a single filled-in rectangle.
// 1. The new row is adjacent to the previously parsed row.
if (rowCount != gridArea.rows.resolvedFinalPosition())
return false;
// 2. The new area starts at the same position as the previously parsed area.
if (currentCol != gridArea.columns.resolvedInitialPosition())
return false;
// 3. The new area ends at the same position as the previously parsed area.
if (lookAheadCol != gridArea.columns.resolvedFinalPosition())
return false;
gridArea.rows = GridSpan::translatedDefiniteGridSpan(gridArea.rows.resolvedInitialPosition(), gridArea.rows.resolvedFinalPosition() + 1);
}
currentCol = lookAheadCol - 1;
}
m_valueList->next();
return true;
}
PassRefPtrWillBeRawPtr<CSSValue> CSSPropertyParser::parseGridTemplateAreas()
{
if (m_valueList->current() && m_valueList->current()->id == CSSValueNone) {
m_valueList->next();
return cssValuePool().createIdentifierValue(CSSValueNone);
}
NamedGridAreaMap gridAreaMap;
size_t rowCount = 0;
size_t columnCount = 0;
while (m_valueList->current()) {
if (!parseGridTemplateAreasRow(gridAreaMap, rowCount, columnCount))
return nullptr;
++rowCount;
}
if (!rowCount || !columnCount)
return nullptr;
return CSSGridTemplateAreasValue::create(gridAreaMap, rowCount, columnCount);
}
PassRefPtrWillBeRawPtr<CSSValue> CSSPropertyParser::parseGridAutoFlow(CSSParserValueList& list)
{
// [ row | column ] || dense
ASSERT(RuntimeEnabledFeatures::cssGridLayoutEnabled());
CSSParserValue* value = list.current();
if (!value)
return nullptr;
RefPtrWillBeRawPtr<CSSValueList> parsedValues = CSSValueList::createSpaceSeparated();
// First parameter.
CSSValueID firstId = value->id;
if (firstId != CSSValueRow && firstId != CSSValueColumn && firstId != CSSValueDense)
return nullptr;
parsedValues->append(cssValuePool().createIdentifierValue(firstId));
// Second parameter, if any.
value = list.next();
if (value) {
switch (firstId) {
case CSSValueRow:
case CSSValueColumn:
if (value->id != CSSValueDense)
return parsedValues;
break;
case CSSValueDense:
if (value->id != CSSValueRow && value->id != CSSValueColumn)
return parsedValues;
break;
default:
return parsedValues;
}
parsedValues->append(cssValuePool().createIdentifierValue(value->id));
list.next();
}
return parsedValues;
}
static bool isBaselinePositionKeyword(CSSValueID id)
{
return id == CSSValueBaseline || id == CSSValueLastBaseline;
}
static bool isAlignmentOverflowKeyword(CSSValueID id)
{
return id == CSSValueUnsafe || id == CSSValueSafe;
}
static bool isItemPositionKeyword(CSSValueID id)
{
return id == CSSValueStart || id == CSSValueEnd || id == CSSValueCenter
|| id == CSSValueSelfStart || id == CSSValueSelfEnd || id == CSSValueFlexStart
|| id == CSSValueFlexEnd || id == CSSValueLeft || id == CSSValueRight;
}
PassRefPtrWillBeRawPtr<CSSValue> CSSPropertyParser::parseLegacyPosition()
{
// [ legacy && [ left | right | center ]
CSSParserValue* value = m_valueList->current();
ASSERT(value);
if (value->id == CSSValueLegacy) {
value = m_valueList->next();
if (!value)
return nullptr;
if (value->id != CSSValueCenter && value->id != CSSValueLeft && value->id != CSSValueRight)
return nullptr;
} else if (value->id == CSSValueCenter || value->id == CSSValueLeft || value->id == CSSValueRight) {
if (!m_valueList->next() || m_valueList->current()->id != CSSValueLegacy)
return nullptr;
} else {
return nullptr;
}
m_valueList->next();
return CSSValuePair::create(cssValuePool().createIdentifierValue(CSSValueLegacy), cssValuePool().createIdentifierValue(value->id), CSSValuePair::DropIdenticalValues);
}
PassRefPtrWillBeRawPtr<CSSValue> CSSPropertyParser::parseItemPositionOverflowPosition()
{
// 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> = unsafe | safe
CSSParserValue* value = m_valueList->current();
ASSERT(value);
if (value->id == CSSValueAuto || value->id == CSSValueStretch || isBaselinePositionKeyword(value->id)) {
m_valueList->next();
return cssValuePool().createIdentifierValue(value->id);
}
RefPtrWillBeRawPtr<CSSPrimitiveValue> position = nullptr;
RefPtrWillBeRawPtr<CSSPrimitiveValue> overflowAlignmentKeyword = nullptr;
if (isItemPositionKeyword(value->id)) {
position = cssValuePool().createIdentifierValue(value->id);
value = m_valueList->next();
if (value) {
if (isAlignmentOverflowKeyword(value->id))
overflowAlignmentKeyword = cssValuePool().createIdentifierValue(value->id);
else
return nullptr;
}
} else if (isAlignmentOverflowKeyword(value->id)) {
overflowAlignmentKeyword = cssValuePool().createIdentifierValue(value->id);
value = m_valueList->next();
if (value && isItemPositionKeyword(value->id))
position = cssValuePool().createIdentifierValue(value->id);
else
return nullptr;
} else {
return nullptr;
}
m_valueList->next();
ASSERT(position);
if (overflowAlignmentKeyword)
return CSSValuePair::create(position, overflowAlignmentKeyword, CSSValuePair::DropIdenticalValues);
return position.release();
}
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::UnitType::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(const 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(const 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;
}
bool CSSPropertyParser::parseColorFromValue(const CSSParserValue* value, RGBA32& result, bool acceptQuirkyColors)
{
if (acceptQuirkyColors && value->unit() == CSSPrimitiveValue::UnitType::Number
&& value->fValue >= 0. && value->fValue < 1000000. && value->isInt) {
String str = String::format("%06d", static_cast<int>(value->fValue));
return Color::parseHexColor(str, result);
}
if (acceptQuirkyColors && value->m_unit == CSSParserValue::DimensionList) {
CSSParserValue* numberToken = value->valueList->valueAt(0);
CSSParserValue* unitToken = value->valueList->valueAt(1);
ASSERT(numberToken->unit() == CSSPrimitiveValue::UnitType::Number);
ASSERT(unitToken->m_unit == CSSParserValue::Identifier);
if (!numberToken->isInt || numberToken->fValue < 0)
return false;
String color = String::number(numberToken->fValue) + String(unitToken->string);
if (color.length() > 6)
return false;
while (color.length() < 6)
color = "0" + color;
return Color::parseHexColor(color, result);
}
if (value->m_unit == CSSParserValue::Identifier) {
Color color;
if (!color.setNamedColor(value->string))
return acceptQuirkyColors && Color::parseHexColor(value->string, result);
result = color.rgb();
return true;
}
if (value->m_unit == CSSParserValue::HexColor) {
if (value->string.is8Bit())
return Color::parseHexColor(value->string.characters8(), value->string.length(), result);
return Color::parseHexColor(value->string.characters16(), value->string.length(), result);
}
if (value->m_unit == CSSParserValue::Function
&& value->function->args != 0
&& value->function->args->size() == 5 /* rgb + two commas */
&& value->function->id == CSSValueRgb) {
int colorValues[3];
if (!parseColorParameters(value, colorValues, false))
return false;
result = makeRGB(colorValues[0], colorValues[1], colorValues[2]);
} else {
if (value->m_unit == CSSParserValue::Function
&& value->function->args != 0
&& value->function->args->size() == 7 /* rgba + three commas */
&& value->function->id == CSSValueRgba) {
int colorValues[4];
if (!parseColorParameters(value, colorValues, true))
return false;
result = makeRGBA(colorValues[0], colorValues[1], colorValues[2], colorValues[3]);
} else if (value->m_unit == CSSParserValue::Function
&& value->function->args != 0
&& value->function->args->size() == 5 /* hsl + two commas */
&& value->function->id == CSSValueHsl) {
double colorValues[3];
if (!parseHSLParameters(value, colorValues, false))
return false;
result = makeRGBAFromHSLA(colorValues[0], colorValues[1], colorValues[2], 1.0);
} else if (value->m_unit == CSSParserValue::Function
&& value->function->args != 0
&& value->function->args->size() == 7 /* hsla + three commas */
&& value->function->id == CSSValueHsla) {
double colorValues[4];
if (!parseHSLParameters(value, colorValues, true))
return false;
result = makeRGBAFromHSLA(colorValues[0], colorValues[1], colorValues[2], colorValues[3]);
} else {
return false;
}
}
return true;
}
// This should go away once we drop support for -webkit-gradient
static PassRefPtrWillBeRawPtr<CSSPrimitiveValue> parseDeprecatedGradientPoint(CSSParserValue* a, bool horizontal)
{
RefPtrWillBeRawPtr<CSSPrimitiveValue> result = nullptr;
if (a->m_unit == CSSParserValue::Identifier) {
if ((a->id == CSSValueLeft && horizontal)
|| (a->id == CSSValueTop && !horizontal))
result = cssValuePool().createValue(0., CSSPrimitiveValue::UnitType::Percentage);
else if ((a->id == CSSValueRight && horizontal)
|| (a->id == CSSValueBottom && !horizontal))
result = cssValuePool().createValue(100., CSSPrimitiveValue::UnitType::Percentage);
else if (a->id == CSSValueCenter)
result = cssValuePool().createValue(50., CSSPrimitiveValue::UnitType::Percentage);
} else if (a->unit() == CSSPrimitiveValue::UnitType::Number || a->unit() == CSSPrimitiveValue::UnitType::Percentage) {
result = cssValuePool().createValue(a->fValue, a->unit());
}
return result;
}
// Used to parse colors for -webkit-gradient(...).
PassRefPtrWillBeRawPtr<CSSValue> CSSPropertyParser::parseDeprecatedGradientStopColor(const CSSParserValue* value)
{
// Disallow currentcolor.
if (value->id == CSSValueCurrentcolor)
return nullptr;
return parseColor(value);
}
bool CSSPropertyParser::parseDeprecatedGradientColorStop(CSSParserValue* a, CSSGradientColorStop& stop)
{
if (a->m_unit != CSSParserValue::Function)
return false;
if (a->function->id != CSSValueFrom
&& a->function->id != CSSValueTo
&& a->function->id != CSSValueColorStop)
return false;
CSSParserValueList* args = a->function->args.get();
if (!args)
return false;
if (a->function->id == CSSValueFrom || a->function->id == CSSValueTo) {
// The "from" and "to" stops expect 1 argument.
if (args->size() != 1)
return false;
if (a->function->id == CSSValueFrom)
stop.m_position = cssValuePool().createValue(0, CSSPrimitiveValue::UnitType::Number);
else
stop.m_position = cssValuePool().createValue(1, CSSPrimitiveValue::UnitType::Number);
stop.m_color = parseDeprecatedGradientStopColor(args->current());
if (!stop.m_color)
return false;
}
// The "color-stop" function expects 3 arguments.
if (a->function->id == CSSValueColorStop) {
if (args->size() != 3)
return false;
CSSParserValue* stopArg = args->current();
if (stopArg->unit() == CSSPrimitiveValue::UnitType::Percentage)
stop.m_position = cssValuePool().createValue(stopArg->fValue / 100, CSSPrimitiveValue::UnitType::Number);
else if (stopArg->unit() == CSSPrimitiveValue::UnitType::Number)
stop.m_position = cssValuePool().createValue(stopArg->fValue, CSSPrimitiveValue::UnitType::Number);
else
return false;
args->next();
if (!consumeComma(args))
return false;
stop.m_color = parseDeprecatedGradientStopColor(args->current());
if (!stop.m_color)
return false;
}
return true;
}
bool CSSPropertyParser::parseDeprecatedGradient(CSSParserValueList* valueList, RefPtrWillBeRawPtr<CSSValue>& gradient)
{
// Walk the arguments.
CSSParserValueList* args = valueList->current()->function->args.get();
if (!args || args->size() == 0)
return false;
// The first argument is the gradient type. It is an identifier.
CSSGradientType gradientType;
CSSParserValue* a = args->current();
if (!a || a->m_unit != CSSParserValue::Identifier)
return false;
if (a->id == CSSValueLinear)
gradientType = CSSDeprecatedLinearGradient;
else if (a->id == CSSValueRadial)
gradientType = CSSDeprecatedRadialGradient;
else
return false;
RefPtrWillBeRawPtr<CSSGradientValue> result = nullptr;
switch (gradientType) {
case CSSDeprecatedLinearGradient:
result = CSSLinearGradientValue::create(NonRepeating, gradientType);
break;
case CSSDeprecatedRadialGradient:
result = CSSRadialGradientValue::create(NonRepeating, gradientType);
break;
default:
// The rest of the gradient types shouldn't appear here.
ASSERT_NOT_REACHED();
}
args->next();
if (!consumeComma(args))
return false;
// Next comes the starting point for the gradient as an x y pair. There is no
// comma between the x and the y values.
// First X. It can be left, right, number or percent.
a = args->current();
if (!a)
return false;
RefPtrWillBeRawPtr<CSSPrimitiveValue> point = parseDeprecatedGradientPoint(a, true);
if (!point)
return false;
result->setFirstX(point.release());
// First Y. It can be top, bottom, number or percent.
a = args->next();
if (!a)
return false;
point = parseDeprecatedGradientPoint(a, false);
if (!point)
return false;
result->setFirstY(point.release());
// Comma after the first point.
args->next();
if (!consumeComma(args))
return false;
// For radial gradients only, we now expect a numeric radius.
if (gradientType == CSSDeprecatedRadialGradient) {
a = args->current();
if (!a || a->unit() != CSSPrimitiveValue::UnitType::Number)
return false;
toCSSRadialGradientValue(result.get())->setFirstRadius(createPrimitiveNumericValue(a));
// Comma after the first radius.
args->next();
if (!consumeComma(args))
return false;
}
// Next is the ending point for the gradient as an x, y pair.
// Second X. It can be left, right, number or percent.
a = args->current();
if (!a)
return false;
point = parseDeprecatedGradientPoint(a, true);
if (!point)
return false;
result->setSecondX(point.release());
// Second Y. It can be top, bottom, number or percent.
a = args->next();
if (!a)
return false;
point = parseDeprecatedGradientPoint(a, false);
if (!point)
return false;
result->setSecondY(point.release());
args->next();
// For radial gradients only, we now expect the second radius.
if (gradientType == CSSDeprecatedRadialGradient) {
// Comma after the second point.
if (!consumeComma(args))
return false;
a = args->current();
if (!a || a->unit() != CSSPrimitiveValue::UnitType::Number)
return false;
toCSSRadialGradientValue(result.get())->setSecondRadius(createPrimitiveNumericValue(a));
args->next();
}
// We now will accept any number of stops (0 or more).
a = args->current();
while (a) {
// Look for the comma before the next stop.
if (!consumeComma(args))
return false;
// Now examine the stop itself.
a = args->current();
if (!a)
return false;
// The function name needs to be one of "from", "to", or "color-stop."
CSSGradientColorStop stop;
if (!parseDeprecatedGradientColorStop(a, stop))
return false;
result->addStop(stop);
// Advance
a = args->next();
}
gradient = result.release();
return true;
}
static PassRefPtrWillBeRawPtr<CSSPrimitiveValue> valueFromSideKeyword(CSSParserValue* a, bool& isHorizontal)
{
if (a->m_unit != CSSParserValue::Identifier)
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);
}
bool CSSPropertyParser::parseDeprecatedLinearGradient(CSSParserValueList* valueList, RefPtrWillBeRawPtr<CSSValue>& gradient, CSSGradientRepeat repeating)
{
RefPtrWillBeRawPtr<CSSLinearGradientValue> result = CSSLinearGradientValue::create(repeating, CSSPrefixedLinearGradient);
// Walk the arguments.
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 {
// Look one or two optional keywords that indicate a side or corner.
RefPtrWillBeRawPtr<CSSPrimitiveValue> startX = nullptr;
RefPtrWillBeRawPtr<CSSPrimitiveValue> startY = nullptr;
RefPtrWillBeRawPtr<CSSPrimitiveValue> location = nullptr;
bool isHorizontal = false;
if ((location = valueFromSideKeyword(a, isHorizontal))) {
if (isHorizontal)
startX = location;
else
startY = location;
a = args->next();
if (a) {
if ((location = valueFromSideKeyword(a, isHorizontal))) {
if (isHorizontal) {
if (startX)
return false;
startX = location;
} else {
if (startY)
return false;
startY = location;
}
args->next();
}
}
expectComma = true;
}
if (!startX && !startY)
startY = cssValuePool().createIdentifierValue(CSSValueTop);
result->setFirstX(startX.release());
result->setFirstY(startY.release());
}
if (!parseGradientColorStops(args, result.get(), expectComma))
return false;
if (!result->stopCount())
return false;
gradient = result.release();
return true;
}
bool CSSPropertyParser::parseDeprecatedRadialGradient(CSSParserValueList* valueList, RefPtrWillBeRawPtr<CSSValue>& gradient, CSSGradientRepeat repeating)
{
RefPtrWillBeRawPtr<CSSRadialGradientValue> result = CSSRadialGradientValue::create(repeating, CSSPrefixedRadialGradient);
// Walk the arguments.
CSSParserValueList* args = valueList->current()->function->args.get();
if (!args || !args->size())
return false;
CSSParserValue* a = args->current();
if (!a)
return false;
bool expectComma = false;
// Optional background-position
RefPtrWillBeRawPtr<CSSValue> centerX = nullptr;
RefPtrWillBeRawPtr<CSSValue> centerY = nullptr;
// parse2ValuesFillPosition advances the args next pointer.
parse2ValuesFillPosition(args, centerX, centerY);
if ((centerX || centerY) && !consumeComma(args))
return false;
a = args->current();
if (!a)
return false;
result->setFirstX(toCSSPrimitiveValue(centerX.get()));
result->setSecondX(toCSSPrimitiveValue(centerX.get()));
// CSS3 radial gradients always share the same start and end point.
result->setFirstY(toCSSPrimitiveValue(centerY.get()));
result->setSecondY(toCSSPrimitiveValue(centerY.get()));
RefPtrWillBeRawPtr<CSSPrimitiveValue> shapeValue = nullptr;
RefPtrWillBeRawPtr<CSSPrimitiveValue> sizeValue = nullptr;
// Optional shape and/or size in any order.
for (int i = 0; i < 2; ++i) {
if (a->m_unit != CSSParserValue::Identifier)
break;
bool foundValue = false;
switch (a->id) {
case CSSValueCircle:
case CSSValueEllipse:
shapeValue = cssValuePool().createIdentifierValue(a->id);
foundValue = true;
break;
case CSSValueClosestSide:
case CSSValueClosestCorner:
case CSSValueFarthestSide:
case CSSValueFarthestCorner:
case CSSValueContain:
case CSSValueCover:
sizeValue = cssValuePool().createIdentifierValue(a->id);
foundValue = true;
break;
default:
break;
}
if (foundValue) {
a = args->next();
if (!a)
return false;
expectComma = true;
}
}
result->setShape(shapeValue);
result->setSizingBehavior(sizeValue);
// Or, two lengths or percentages
RefPtrWillBeRawPtr<CSSPrimitiveValue> horizontalSize = nullptr;
RefPtrWillBeRawPtr<CSSPrimitiveValue> verticalSize = nullptr;
if (!shapeValue && !sizeValue) {
if (validUnit(a, FLength | FPercent)) {
horizontalSize = createPrimitiveNumericValue(a);
a = args->next();
if (!a)
return false;
expectComma = true;
}
if (validUnit(a, FLength | FPercent)) {
verticalSize = createPrimitiveNumericValue(a);
a = args->next();
if (!a)
return false;
expectComma = true;
}
}
// Must have neither or both.
if (!horizontalSize != !verticalSize)
return false;
result->setEndHorizontalSize(horizontalSize);
result->setEndVerticalSize(verticalSize);
if (!parseGradientColorStops(args, result.get(), expectComma))
return false;
gradient = result.release();
return true;
}
bool CSSPropertyParser::parseLinearGradient(CSSParserValueList* valueList, RefPtrWillBeRawPtr<CSSValue>& gradient, CSSGradientRepeat repeating)
{
RefPtrWillBeRawPtr<CSSLinearGradientValue> result = CSSLinearGradientValue::create(repeating, CSSLinearGradient);
CSSParserFunction* function = valueList->current()->function;
CSSParserValueList* args = 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->m_unit == CSSParserValue::Identifier && a->id == CSSValueTo) {
// to [ [left | right] || [top | bottom] ]
a = args->next();
if (!a)
return false;
RefPtrWillBeRawPtr<CSSPrimitiveValue> endX = nullptr;
RefPtrWillBeRawPtr<CSSPrimitiveValue> endY = nullptr;
RefPtrWillBeRawPtr<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, RefPtrWillBeRawPtr<CSSValue>& gradient, CSSGradientRepeat repeating)
{
RefPtrWillBeRawPtr<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;
RefPtrWillBeRawPtr<CSSPrimitiveValue> shapeValue = nullptr;
RefPtrWillBeRawPtr<CSSPrimitiveValue> sizeValue = nullptr;
RefPtrWillBeRawPtr<CSSPrimitiveValue> horizontalSize = nullptr;
RefPtrWillBeRawPtr<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->m_unit == CSSParserValue::Identifier) {
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>
RefPtrWillBeRawPtr<CSSValue> centerX = nullptr;
RefPtrWillBeRawPtr<CSSValue> centerY = nullptr;
if (a->m_unit == CSSParserValue::Identifier && 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(centerX);
result->setFirstY(centerY);
// Right now, CSS radial gradients have the same start and end centers.
result->setSecondX(centerX);
result->setSecondY(centerY);
}
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.
// <color-stop-list> = [ <color-stop> , <color-hint>? ]# , <color-stop>
bool supportsColorHints = gradient->gradientType() == CSSLinearGradient
|| gradient->gradientType() == CSSRadialGradient;
// The first color stop cannot be a color hint.
bool previousStopWasColorHint = true;
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> ]?
// <color-hint> = <length> | <percentage>
CSSGradientColorStop stop;
stop.m_color = parseColor(a);
// Two hints in a row are not allowed.
if (!stop.m_color && (!supportsColorHints || previousStopWasColorHint))
return false;
previousStopWasColorHint = !stop.m_color;
if (stop.m_color)
a = valueList->next();
if (a) {
if (validUnit(a, FLength | FPercent)) {
stop.m_position = createPrimitiveNumericValue(a);
a = valueList->next();
}
}
if (!stop.m_color && !stop.m_position)
return false;
gradient->addStop(stop);
expectComma = true;
}
// The last color stop cannot be a color hint.
if (previousStopWasColorHint)
return false;
// Must have 2 or more stops to be valid.
return gradient->stopCount() >= 2;
}
bool CSSPropertyParser::parseGeneratedImage(CSSParserValueList* valueList, RefPtrWillBeRawPtr<CSSValue>& value)
{
CSSParserValue* val = valueList->current();
if (val->m_unit != CSSParserValue::Function)
return false;
if (val->function->id == CSSValueWebkitGradient) {
// FIXME: This should send a deprecation message.
if (m_context.useCounter())
m_context.useCounter()->count(UseCounter::DeprecatedWebKitGradient);
return parseDeprecatedGradient(valueList, value);
}
if (val->function->id == CSSValueWebkitLinearGradient) {
// FIXME: This should send a deprecation message.
if (m_context.useCounter())
m_context.useCounter()->count(UseCounter::DeprecatedWebKitLinearGradient);
return parseDeprecatedLinearGradient(valueList, value, NonRepeating);
}
if (val->function->id == CSSValueLinearGradient)
return parseLinearGradient(valueList, value, NonRepeating);
if (val->function->id == CSSValueWebkitRepeatingLinearGradient) {
// FIXME: This should send a deprecation message.
if (m_context.useCounter())
m_context.useCounter()->count(UseCounter::DeprecatedWebKitRepeatingLinearGradient);
return parseDeprecatedLinearGradient(valueList, value, Repeating);
}
if (val->function->id == CSSValueRepeatingLinearGradient)
return parseLinearGradient(valueList, value, Repeating);
if (val->function->id == CSSValueWebkitRadialGradient) {
// FIXME: This should send a deprecation message.
if (m_context.useCounter())
m_context.useCounter()->count(UseCounter::DeprecatedWebKitRadialGradient);
return parseDeprecatedRadialGradient(valueList, value, NonRepeating);
}
if (val->function->id == CSSValueRadialGradient)
return parseRadialGradient(valueList, value, NonRepeating);
if (val->function->id == CSSValueWebkitRepeatingRadialGradient) {
if (m_context.useCounter())
m_context.useCounter()->count(UseCounter::DeprecatedWebKitRepeatingRadialGradient);
return parseDeprecatedRadialGradient(valueList, value, Repeating);
}
if (val->function->id == CSSValueRepeatingRadialGradient)
return parseRadialGradient(valueList, value, Repeating);
if (val->function->id == CSSValueWebkitCrossFade)
return parseCrossfade(valueList, value);
return false;
}
bool CSSPropertyParser::parseCrossfade(CSSParserValueList* valueList, RefPtrWillBeRawPtr<CSSValue>& crossfade)
{
// Walk the arguments.
CSSParserValueList* args = valueList->current()->function->args.get();
if (!args || args->size() != 5)
return false;
RefPtrWillBeRawPtr<CSSValue> fromImageValue = nullptr;
RefPtrWillBeRawPtr<CSSValue> toImageValue = nullptr;
// The first argument is the "from" image. It is a fill image.
if (!args->current() || !parseFillImage(args, fromImageValue))
return false;
args->next();
if (!consumeComma(args))
return false;
// The second argument is the "to" image. It is a fill image.
if (!args->current() || !parseFillImage(args, toImageValue))
return false;
args->next();
if (!consumeComma(args))
return false;
// The third argument is the crossfade value. It is a percentage or a fractional number.
RefPtrWillBeRawPtr<CSSPrimitiveValue> percentage = nullptr;
CSSParserValue* value = args->current();
if (!value)
return false;
if (value->unit() == CSSPrimitiveValue::UnitType::Percentage)
percentage = cssValuePool().createValue(clampTo<double>(value->fValue / 100, 0, 1), CSSPrimitiveValue::UnitType::Number);
else if (value->unit() == CSSPrimitiveValue::UnitType::Number)
percentage = cssValuePool().createValue(clampTo<double>(value->fValue, 0, 1), CSSPrimitiveValue::UnitType::Number);
else
return false;
crossfade = CSSCrossfadeValue::create(fromImageValue, toImageValue, percentage);
return true;
}
PassRefPtrWillBeRawPtr<CSSValue> CSSPropertyParser::parseImageSet(CSSParserValueList* valueList)
{
CSSParserValue* function = valueList->current();
if (function->m_unit != CSSParserValue::Function)
return nullptr;
CSSParserValueList* functionArgs = valueList->current()->function->args.get();
if (!functionArgs || !functionArgs->size() || !functionArgs->current())
return nullptr;
RefPtrWillBeRawPtr<CSSImageSetValue> imageSet = CSSImageSetValue::create();
while (functionArgs->current()) {
CSSParserValue* arg = functionArgs->current();
if (arg->m_unit != CSSParserValue::URI)
return nullptr;
RefPtrWillBeRawPtr<CSSValue> image = createCSSImageValueWithReferrer(arg->string, m_context);
imageSet->append(image);
arg = functionArgs->next();
if (!arg)
return nullptr;
if (arg->m_unit != CSSParserValue::DimensionList)
return nullptr;
ASSERT(arg->valueList->valueAt(0)->unit() == CSSPrimitiveValue::UnitType::Number);
ASSERT(arg->valueList->valueAt(1)->m_unit == CSSParserValue::Identifier);
if (String(arg->valueList->valueAt(1)->string) != "x")
return nullptr;
double imageScaleFactor = arg->valueList->valueAt(0)->fValue;
if (imageScaleFactor <= 0)
return nullptr;
imageSet->append(cssValuePool().createValue(imageScaleFactor, CSSPrimitiveValue::UnitType::Number));
functionArgs->next();
// If there are no more arguments, we're done.
if (!functionArgs->current())
break;
// If there are more arguments, they should be after a comma.
if (!consumeComma(functionArgs))
return nullptr;
}
return imageSet.release();
}
bool CSSPropertyParser::parseCalculation(CSSParserValue* value, ValueRange range)
{
ASSERT(isCalculation(value));
CSSParserTokenRange args = value->calcFunction->args;
ASSERT(!m_parsedCalculation);
m_parsedCalculation = CSSCalcValue::create(args, range);
if (!m_parsedCalculation)
return false;
return true;
}
} // namespace blink