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webkit / WebKit / e9437795f031c41dfda0259337a1f6c09a299767 / . / Source / WebCore / css / CSSParser.cpp
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/*
* Copyright (C) 2003 Lars Knoll (knoll@kde.org)
* Copyright (C) 2005 Allan Sandfeld Jensen (kde@carewolf.com)
* Copyright (C) 2004-2014 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, 2013 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 "config.h"
#include "CSSParser.h"
#include "CSSAspectRatioValue.h"
#include "CSSBasicShapes.h"
#include "CSSBorderImage.h"
#include "CSSCanvasValue.h"
#include "CSSCrossfadeValue.h"
#include "CSSCursorImageValue.h"
#include "CSSFilterImageValue.h"
#include "CSSFontFaceRule.h"
#include "CSSFontFaceSrcValue.h"
#include "CSSFontFeatureValue.h"
#include "CSSFontValue.h"
#include "CSSFunctionValue.h"
#include "CSSGradientValue.h"
#include "CSSImageValue.h"
#include "CSSInheritedValue.h"
#include "CSSInitialValue.h"
#include "CSSLineBoxContainValue.h"
#include "CSSMediaRule.h"
#include "CSSPageRule.h"
#include "CSSPrimitiveValue.h"
#include "CSSPropertySourceData.h"
#include "CSSReflectValue.h"
#include "CSSSelector.h"
#include "CSSShadowValue.h"
#include "CSSStyleSheet.h"
#include "CSSTimingFunctionValue.h"
#include "CSSUnicodeRangeValue.h"
#include "CSSValueKeywords.h"
#include "CSSValueList.h"
#include "CSSValuePool.h"
#include "Counter.h"
#include "Document.h"
#include "FloatConversion.h"
#include "HTMLParserIdioms.h"
#include "HashTools.h"
#include "MediaList.h"
#include "MediaQueryExp.h"
#include "Page.h"
#include "PageConsoleClient.h"
#include "Pair.h"
#include "Rect.h"
#include "RenderTheme.h"
#include "RuntimeEnabledFeatures.h"
#include "SVGParserUtilities.h"
#include "Settings.h"
#include "StyleProperties.h"
#include "StylePropertyShorthand.h"
#include "StyleRule.h"
#include "StyleRuleImport.h"
#include "StyleSheetContents.h"
#include "TextEncoding.h"
#include "WebKitCSSFilterValue.h"
#include "WebKitCSSKeyframeRule.h"
#include "WebKitCSSKeyframesRule.h"
#include "WebKitCSSRegionRule.h"
#include "WebKitCSSTransformValue.h"
#include <bitset>
#include <limits.h>
#include <wtf/HexNumber.h>
#include <wtf/NeverDestroyed.h>
#include <wtf/StdLibExtras.h>
#include <wtf/dtoa.h>
#include <wtf/text/StringBuffer.h>
#include <wtf/text/StringBuilder.h>
#include <wtf/text/StringImpl.h>
#if ENABLE(CSS_GRID_LAYOUT)
#include "CSSGridLineNamesValue.h"
#endif
#if ENABLE(CSS_IMAGE_SET)
#include "CSSImageSetValue.h"
#endif
#if ENABLE(CSS_SCROLL_SNAP)
#include "LengthRepeat.h"
#endif
#if ENABLE(DASHBOARD_SUPPORT)
#include "DashboardRegion.h"
#endif
#define YYDEBUG 0
#if YYDEBUG > 0
extern int cssyydebug;
#endif
extern int cssyyparse(WebCore::CSSParser*);
using namespace WTF;
namespace {
enum PropertyType {
PropertyExplicit,
PropertyImplicit
};
class ImplicitScope {
WTF_MAKE_NONCOPYABLE(ImplicitScope);
public:
ImplicitScope(WebCore::CSSParser* parser, PropertyType propertyType)
: m_parser(parser)
{
m_parser->m_implicitShorthand = propertyType == PropertyImplicit;
}
~ImplicitScope()
{
m_parser->m_implicitShorthand = false;
}
private:
WebCore::CSSParser* m_parser;
};
} // namespace
namespace WebCore {
static const unsigned INVALID_NUM_PARSED_PROPERTIES = UINT_MAX;
static const double MAX_SCALE = 1000000;
#if ENABLE(CSS_GRID_LAYOUT)
static const unsigned MAX_GRID_TRACK_REPETITIONS = 10000;
#endif
template <unsigned N>
static bool equal(const CSSParserString& a, const char (&b)[N])
{
unsigned length = N - 1; // Ignore the trailing null character
if (a.length() != length)
return false;
return a.is8Bit() ? WTF::equal(a.characters8(), reinterpret_cast<const LChar*>(b), length) : WTF::equal(a.characters16(), reinterpret_cast<const LChar*>(b), length);
}
template <unsigned N>
static bool equalIgnoringCase(const CSSParserString& a, const char (&b)[N])
{
unsigned length = N - 1; // Ignore the trailing null character
if (a.length() != length)
return false;
return a.is8Bit() ? WTF::equalIgnoringCase(b, a.characters8(), length) : WTF::equalIgnoringCase(b, a.characters16(), length);
}
template <unsigned N>
static bool equalIgnoringCase(CSSParserValue* value, const char (&b)[N])
{
ASSERT(value->unit == CSSPrimitiveValue::CSS_IDENT || value->unit == CSSPrimitiveValue::CSS_STRING);
return equalIgnoringCase(value->string, b);
}
static bool hasPrefix(const char* string, unsigned length, const char* prefix)
{
for (unsigned i = 0; i < length; ++i) {
if (!prefix[i])
return true;
if (string[i] != prefix[i])
return false;
}
return false;
}
static PassRef<CSSPrimitiveValue> createPrimitiveValuePair(PassRefPtr<CSSPrimitiveValue> first, PassRefPtr<CSSPrimitiveValue> second)
{
return cssValuePool().createValue(Pair::create(first, second));
}
class AnimationParseContext {
public:
AnimationParseContext()
: m_animationPropertyKeywordAllowed(true)
, m_firstAnimationCommitted(false)
, m_hasSeenAnimationPropertyKeyword(false)
{
}
void commitFirstAnimation()
{
m_firstAnimationCommitted = true;
}
bool hasCommittedFirstAnimation() const
{
return m_firstAnimationCommitted;
}
void commitAnimationPropertyKeyword()
{
m_animationPropertyKeywordAllowed = false;
}
bool animationPropertyKeywordAllowed() const
{
return m_animationPropertyKeywordAllowed;
}
bool hasSeenAnimationPropertyKeyword() const
{
return m_hasSeenAnimationPropertyKeyword;
}
void sawAnimationPropertyKeyword()
{
m_hasSeenAnimationPropertyKeyword = true;
}
private:
bool m_animationPropertyKeywordAllowed;
bool m_firstAnimationCommitted;
bool m_hasSeenAnimationPropertyKeyword;
};
const CSSParserContext& strictCSSParserContext()
{
static NeverDestroyed<CSSParserContext> strictContext(CSSStrictMode);
return strictContext;
}
CSSParserContext::CSSParserContext(CSSParserMode mode, const URL& baseURL)
: baseURL(baseURL)
, mode(mode)
, isHTMLDocument(false)
, isCSSRegionsEnabled(false)
, isCSSCompositingEnabled(false)
, needsSiteSpecificQuirks(false)
, enforcesCSSMIMETypeInNoQuirksMode(true)
, useLegacyBackgroundSizeShorthandBehavior(false)
{
#if PLATFORM(IOS)
// FIXME: Force the site specific quirk below to work on iOS. Investigating other site specific quirks
// to see if we can enable the preference all together is to be handled by:
// <rdar://problem/8493309> Investigate Enabling Site Specific Quirks in MobileSafari and UIWebView
needsSiteSpecificQuirks = true;
#endif
}
CSSParserContext::CSSParserContext(Document& document, const URL& baseURL, const String& charset)
: baseURL(baseURL.isNull() ? document.baseURL() : baseURL)
, charset(charset)
, mode(document.inQuirksMode() ? CSSQuirksMode : CSSStrictMode)
, isHTMLDocument(document.isHTMLDocument())
, isCSSRegionsEnabled(document.cssRegionsEnabled())
, isCSSCompositingEnabled(document.cssCompositingEnabled())
, needsSiteSpecificQuirks(document.settings() ? document.settings()->needsSiteSpecificQuirks() : false)
, enforcesCSSMIMETypeInNoQuirksMode(!document.settings() || document.settings()->enforceCSSMIMETypeInNoQuirksMode())
, useLegacyBackgroundSizeShorthandBehavior(document.settings() ? document.settings()->useLegacyBackgroundSizeShorthandBehavior() : false)
{
#if PLATFORM(IOS)
// FIXME: Force the site specific quirk below to work on iOS. Investigating other site specific quirks
// to see if we can enable the preference all together is to be handled by:
// <rdar://problem/8493309> Investigate Enabling Site Specific Quirks in MobileSafari and UIWebView
needsSiteSpecificQuirks = true;
#endif
}
bool operator==(const CSSParserContext& a, const CSSParserContext& b)
{
return a.baseURL == b.baseURL
&& a.charset == b.charset
&& a.mode == b.mode
&& a.isHTMLDocument == b.isHTMLDocument
&& a.isCSSRegionsEnabled == b.isCSSRegionsEnabled
&& a.isCSSCompositingEnabled == b.isCSSCompositingEnabled
&& a.needsSiteSpecificQuirks == b.needsSiteSpecificQuirks
&& a.enforcesCSSMIMETypeInNoQuirksMode == b.enforcesCSSMIMETypeInNoQuirksMode
&& a.useLegacyBackgroundSizeShorthandBehavior == b.useLegacyBackgroundSizeShorthandBehavior;
}
CSSParser::CSSParser(const CSSParserContext& context)
: m_context(context)
, m_important(false)
, m_id(CSSPropertyInvalid)
, m_styleSheet(0)
#if ENABLE(CSS3_CONDITIONAL_RULES)
, m_supportsCondition(false)
#endif
, m_selectorListForParseSelector(0)
, m_numParsedPropertiesBeforeMarginBox(INVALID_NUM_PARSED_PROPERTIES)
, m_inParseShorthand(0)
, m_currentShorthand(CSSPropertyInvalid)
, m_implicitShorthand(false)
, m_hasFontFaceOnlyValues(false)
, m_hadSyntacticallyValidCSSRule(false)
, m_logErrors(false)
, m_ignoreErrorsInDeclaration(false)
, m_defaultNamespace(starAtom)
, m_parsedTextPrefixLength(0)
, m_nestedSelectorLevel(0)
, m_propertyRange(UINT_MAX, UINT_MAX)
, m_ruleSourceDataResult(0)
, m_parsingMode(NormalMode)
, m_is8BitSource(false)
, m_currentCharacter8(0)
, m_currentCharacter16(0)
, m_length(0)
, m_token(0)
, m_lineNumber(0)
, m_tokenStartLineNumber(0)
, m_lastSelectorLineNumber(0)
, m_allowImportRules(true)
, m_allowNamespaceDeclarations(true)
#if ENABLE(CSS_DEVICE_ADAPTATION)
, m_inViewport(false)
#endif
{
#if YYDEBUG > 0
cssyydebug = 1;
#endif
m_tokenStart.ptr8 = 0;
}
CSSParser::~CSSParser()
{
clearProperties();
}
template <typename CharacterType>
ALWAYS_INLINE static void makeLower(const CharacterType* input, CharacterType* output, unsigned length)
{
// FIXME: If we need Unicode lowercasing here, then we probably want the real kind
// that can potentially change the length of the string rather than the character
// by character kind. If we don't need Unicode lowercasing, it would be good to
// simplify this function.
if (charactersAreAllASCII(input, length)) {
// Fast case for all-ASCII.
for (unsigned i = 0; i < length; i++)
output[i] = toASCIILower(input[i]);
} else {
for (unsigned i = 0; i < length; i++) {
ASSERT(u_tolower(input[i]) <= 0xFFFF);
output[i] = u_tolower(input[i]);
}
}
}
void CSSParserString::lower()
{
if (is8Bit()) {
makeLower(characters8(), characters8(), length());
return;
}
makeLower(characters16(), characters16(), length());
}
void CSSParser::setupParser(const char* prefix, unsigned prefixLength, const String& string, const char* suffix, unsigned suffixLength)
{
m_parsedTextPrefixLength = prefixLength;
unsigned stringLength = string.length();
unsigned length = stringLength + m_parsedTextPrefixLength + suffixLength + 1;
m_length = length;
if (!stringLength || string.is8Bit()) {
m_dataStart8 = std::make_unique<LChar[]>(length);
for (unsigned i = 0; i < m_parsedTextPrefixLength; i++)
m_dataStart8[i] = prefix[i];
if (stringLength)
memcpy(m_dataStart8.get() + m_parsedTextPrefixLength, string.characters8(), stringLength * sizeof(LChar));
unsigned start = m_parsedTextPrefixLength + stringLength;
unsigned end = start + suffixLength;
for (unsigned i = start; i < end; i++)
m_dataStart8[i] = suffix[i - start];
m_dataStart8[length - 1] = 0;
m_is8BitSource = true;
m_currentCharacter8 = m_dataStart8.get();
m_currentCharacter16 = 0;
setTokenStart<LChar>(m_currentCharacter8);
m_lexFunc = &CSSParser::realLex<LChar>;
return;
}
m_dataStart16 = std::make_unique<UChar[]>(length);
for (unsigned i = 0; i < m_parsedTextPrefixLength; i++)
m_dataStart16[i] = prefix[i];
ASSERT(stringLength);
memcpy(m_dataStart16.get() + m_parsedTextPrefixLength, string.characters16(), stringLength * sizeof(UChar));
unsigned start = m_parsedTextPrefixLength + stringLength;
unsigned end = start + suffixLength;
for (unsigned i = start; i < end; i++)
m_dataStart16[i] = suffix[i - start];
m_dataStart16[length - 1] = 0;
m_is8BitSource = false;
m_currentCharacter8 = 0;
m_currentCharacter16 = m_dataStart16.get();
setTokenStart<UChar>(m_currentCharacter16);
m_lexFunc = &CSSParser::realLex<UChar>;
}
void CSSParser::parseSheet(StyleSheetContents* sheet, const String& string, int startLineNumber, RuleSourceDataList* ruleSourceDataResult, bool logErrors)
{
setStyleSheet(sheet);
m_defaultNamespace = starAtom; // Reset the default namespace.
if (ruleSourceDataResult)
m_currentRuleDataStack = std::make_unique<RuleSourceDataList>();
m_ruleSourceDataResult = ruleSourceDataResult;
m_logErrors = logErrors && sheet->singleOwnerDocument() && !sheet->baseURL().isEmpty() && sheet->singleOwnerDocument()->page();
m_ignoreErrorsInDeclaration = false;
m_lineNumber = startLineNumber;
setupParser("", string, "");
cssyyparse(this);
sheet->shrinkToFit();
m_currentRuleDataStack.reset();
m_ruleSourceDataResult = 0;
m_rule = 0;
m_ignoreErrorsInDeclaration = false;
m_logErrors = false;
}
PassRefPtr<StyleRuleBase> CSSParser::parseRule(StyleSheetContents* sheet, const String& string)
{
setStyleSheet(sheet);
m_allowNamespaceDeclarations = false;
setupParser("@-webkit-rule{", string, "} ");
cssyyparse(this);
return m_rule.release();
}
PassRefPtr<StyleKeyframe> CSSParser::parseKeyframeRule(StyleSheetContents* sheet, const String& string)
{
setStyleSheet(sheet);
setupParser("@-webkit-keyframe-rule{ ", string, "} ");
cssyyparse(this);
return m_keyframe.release();
}
#if ENABLE(CSS3_CONDITIONAL_RULES)
bool CSSParser::parseSupportsCondition(const String& string)
{
m_supportsCondition = false;
// can't use { because tokenizer state switches from supports to initial state when it sees { token.
// instead insert one " " (which is WHITESPACE in CSSGrammar.y)
setupParser("@-webkit-supports-condition ", string, "} ");
cssyyparse(this);
return m_supportsCondition;
}
#endif
static inline bool isColorPropertyID(CSSPropertyID propertyId)
{
switch (propertyId) {
case CSSPropertyColor:
case CSSPropertyBackgroundColor:
case CSSPropertyBorderBottomColor:
case CSSPropertyBorderLeftColor:
case CSSPropertyBorderRightColor:
case CSSPropertyBorderTopColor:
case CSSPropertyOutlineColor:
case CSSPropertyTextLineThroughColor:
case CSSPropertyTextOverlineColor:
case CSSPropertyTextUnderlineColor:
case CSSPropertyWebkitBorderAfterColor:
case CSSPropertyWebkitBorderBeforeColor:
case CSSPropertyWebkitBorderEndColor:
case CSSPropertyWebkitBorderStartColor:
case CSSPropertyWebkitColumnRuleColor:
case CSSPropertyWebkitTextDecorationColor:
case CSSPropertyWebkitTextEmphasisColor:
case CSSPropertyWebkitTextFillColor:
case CSSPropertyWebkitTextStrokeColor:
return true;
default:
return false;
}
}
static bool validPrimitiveValueColor(CSSValueID valueID, bool strict = false)
{
return (valueID == CSSValueWebkitText || valueID == CSSValueCurrentcolor || valueID == CSSValueMenu
|| (valueID >= CSSValueAlpha && valueID <= CSSValueWindowtext)
|| (valueID >= CSSValueWebkitFocusRingColor && valueID < CSSValueWebkitText && !strict));
}
static bool parseColorValue(MutableStyleProperties* declaration, CSSPropertyID propertyId, const String& string, bool important, CSSParserMode cssParserMode)
{
ASSERT(!string.isEmpty());
bool strict = isStrictParserMode(cssParserMode);
if (!isColorPropertyID(propertyId))
return false;
CSSParserString cssString;
cssString.init(string);
CSSValueID valueID = cssValueKeywordID(cssString);
if (validPrimitiveValueColor(valueID, strict)) {
RefPtr<CSSValue> value = cssValuePool().createIdentifierValue(valueID);
declaration->addParsedProperty(CSSProperty(propertyId, value.release(), important));
return true;
}
RGBA32 color;
if (!CSSParser::fastParseColor(color, string, strict && string[0] != '#'))
return false;
RefPtr<CSSValue> value = cssValuePool().createColorValue(color);
declaration->addParsedProperty(CSSProperty(propertyId, value.release(), important));
return true;
}
static inline bool isSimpleLengthPropertyID(CSSPropertyID propertyId, bool& acceptsNegativeNumbers)
{
switch (propertyId) {
case CSSPropertyFontSize:
case CSSPropertyHeight:
case CSSPropertyWidth:
case CSSPropertyMinHeight:
case CSSPropertyMinWidth:
case CSSPropertyPaddingBottom:
case CSSPropertyPaddingLeft:
case CSSPropertyPaddingRight:
case CSSPropertyPaddingTop:
case CSSPropertyWebkitLogicalWidth:
case CSSPropertyWebkitLogicalHeight:
case CSSPropertyWebkitMinLogicalWidth:
case CSSPropertyWebkitMinLogicalHeight:
case CSSPropertyWebkitPaddingAfter:
case CSSPropertyWebkitPaddingBefore:
case CSSPropertyWebkitPaddingEnd:
case CSSPropertyWebkitPaddingStart:
acceptsNegativeNumbers = false;
return true;
#if ENABLE(CSS_SHAPES)
case CSSPropertyWebkitShapeMargin:
acceptsNegativeNumbers = false;
return RuntimeEnabledFeatures::sharedFeatures().cssShapesEnabled();
#endif
case CSSPropertyBottom:
case CSSPropertyCx:
case CSSPropertyCy:
case CSSPropertyLeft:
case CSSPropertyMarginBottom:
case CSSPropertyMarginLeft:
case CSSPropertyMarginRight:
case CSSPropertyMarginTop:
case CSSPropertyR:
case CSSPropertyRx:
case CSSPropertyRy:
case CSSPropertyRight:
case CSSPropertyTop:
case CSSPropertyWebkitMarginAfter:
case CSSPropertyWebkitMarginBefore:
case CSSPropertyWebkitMarginEnd:
case CSSPropertyWebkitMarginStart:
case CSSPropertyX:
case CSSPropertyY:
acceptsNegativeNumbers = true;
return true;
default:
return false;
}
}
template <typename CharacterType>
static inline bool parseSimpleLength(const CharacterType* characters, unsigned& length, CSSPrimitiveValue::UnitTypes& unit, double& number)
{
if (length > 2 && (characters[length - 2] | 0x20) == 'p' && (characters[length - 1] | 0x20) == 'x') {
length -= 2;
unit = CSSPrimitiveValue::CSS_PX;
} else if (length > 1 && characters[length - 1] == '%') {
length -= 1;
unit = CSSPrimitiveValue::CSS_PERCENTAGE;
}
// We rely on charactersToDouble for validation as well. The function
// will set "ok" to "false" if the entire passed-in character range does
// not represent a double.
bool ok;
number = charactersToDouble(characters, length, &ok);
return ok;
}
static bool parseSimpleLengthValue(MutableStyleProperties* declaration, CSSPropertyID propertyId, const String& string, bool important, CSSParserMode cssParserMode)
{
ASSERT(!string.isEmpty());
bool acceptsNegativeNumbers;
if (!isSimpleLengthPropertyID(propertyId, acceptsNegativeNumbers))
return false;
unsigned length = string.length();
double number;
CSSPrimitiveValue::UnitTypes unit = CSSPrimitiveValue::CSS_NUMBER;
if (string.is8Bit()) {
if (!parseSimpleLength(string.characters8(), length, unit, number))
return false;
} else {
if (!parseSimpleLength(string.characters16(), length, unit, number))
return false;
}
if (unit == CSSPrimitiveValue::CSS_NUMBER) {
if (number && isStrictParserMode(cssParserMode))
return false;
unit = CSSPrimitiveValue::CSS_PX;
}
if (number < 0 && !acceptsNegativeNumbers)
return false;
RefPtr<CSSValue> value = cssValuePool().createValue(number, unit);
declaration->addParsedProperty(CSSProperty(propertyId, value.release(), important));
return true;
}
static inline bool isValidKeywordPropertyAndValue(CSSPropertyID propertyId, int valueID, const CSSParserContext& parserContext)
{
if (!valueID)
return false;
switch (propertyId) {
case CSSPropertyBorderCollapse: // collapse | separate | inherit
if (valueID == CSSValueCollapse || valueID == CSSValueSeparate)
return true;
break;
case CSSPropertyBorderTopStyle: // <border-style> | inherit
case CSSPropertyBorderRightStyle: // Defined as: none | hidden | dotted | dashed |
case CSSPropertyBorderBottomStyle: // solid | double | groove | ridge | inset | outset
case CSSPropertyBorderLeftStyle:
case CSSPropertyWebkitBorderAfterStyle:
case CSSPropertyWebkitBorderBeforeStyle:
case CSSPropertyWebkitBorderEndStyle:
case CSSPropertyWebkitBorderStartStyle:
case CSSPropertyWebkitColumnRuleStyle:
if (valueID >= CSSValueNone && valueID <= CSSValueDouble)
return true;
break;
case CSSPropertyBoxSizing:
if (valueID == CSSValueBorderBox || valueID == CSSValueContentBox)
return true;
break;
case CSSPropertyCaptionSide: // top | bottom | left | right | inherit
if (valueID == CSSValueLeft || valueID == CSSValueRight || valueID == CSSValueTop || valueID == CSSValueBottom)
return true;
break;
case CSSPropertyClear: // none | left | right | both | inherit
if (valueID == CSSValueNone || valueID == CSSValueLeft || valueID == CSSValueRight || valueID == CSSValueBoth)
return true;
break;
case CSSPropertyDirection: // ltr | rtl | inherit
if (valueID == CSSValueLtr || valueID == CSSValueRtl)
return true;
break;
case CSSPropertyDisplay:
// inline | block | list-item | inline-block | table |
// inline-table | table-row-group | table-header-group | table-footer-group | table-row |
// table-column-group | table-column | table-cell | table-caption | -webkit-box | -webkit-inline-box | none | inherit
// flex | -webkit-flex | inline-flex | -webkit-inline-flex | -webkit-grid | -webkit-inline-grid
if ((valueID >= CSSValueInline && valueID <= CSSValueWebkitInlineFlex) || valueID == CSSValueNone)
return true;
#if ENABLE(CSS_GRID_LAYOUT)
if (valueID == CSSValueWebkitGrid || valueID == CSSValueWebkitInlineGrid)
return true;
#endif
break;
case CSSPropertyEmptyCells: // show | hide | inherit
if (valueID == CSSValueShow || valueID == CSSValueHide)
return true;
break;
case CSSPropertyFloat: // left | right | none | center (for buggy CSS, maps to none)
if (valueID == CSSValueLeft || valueID == CSSValueRight || valueID == CSSValueNone || valueID == CSSValueCenter)
return true;
break;
case CSSPropertyFontStyle: // normal | italic | oblique | inherit
if (valueID == CSSValueNormal || valueID == CSSValueItalic || valueID == CSSValueOblique)
return true;
break;
case CSSPropertyImageRendering: // auto | optimizeSpeed | optimizeQuality | -webkit-crisp-edges | -webkit-optimize-contrast
if (valueID == CSSValueAuto || valueID == CSSValueOptimizespeed || valueID == CSSValueOptimizequality
|| valueID == CSSValueWebkitCrispEdges || valueID == CSSValueWebkitOptimizeContrast)
return true;
break;
case CSSPropertyListStylePosition: // inside | outside | inherit
if (valueID == CSSValueInside || valueID == CSSValueOutside)
return true;
break;
case CSSPropertyListStyleType:
// See section CSS_PROP_LIST_STYLE_TYPE of file CSSValueKeywords.in
// for the list of supported list-style-types.
if ((valueID >= CSSValueDisc && valueID <= CSSValueKatakanaIroha) || valueID == CSSValueNone)
return true;
break;
case CSSPropertyObjectFit:
if (valueID == CSSValueFill || valueID == CSSValueContain || valueID == CSSValueCover || valueID == CSSValueNone || valueID == CSSValueScaleDown)
return true;
break;
case CSSPropertyOutlineStyle: // (<border-style> except hidden) | auto | inherit
if (valueID == CSSValueAuto || valueID == CSSValueNone || (valueID >= CSSValueInset && valueID <= CSSValueDouble))
return true;
break;
case CSSPropertyOverflowWrap: // normal | break-word
case CSSPropertyWordWrap:
if (valueID == CSSValueNormal || valueID == CSSValueBreakWord)
return true;
break;
#if ENABLE(CSS_SCROLL_SNAP)
case CSSPropertyWebkitScrollSnapType: // none | mandatory | proximity
if (valueID == CSSValueNone || valueID == CSSValueMandatory || valueID == CSSValueProximity)
return true;
break;
#endif
case CSSPropertyOverflowX: // visible | hidden | scroll | auto | marquee | overlay | inherit
if (valueID == CSSValueVisible || valueID == CSSValueHidden || valueID == CSSValueScroll || valueID == CSSValueAuto || valueID == CSSValueOverlay || valueID == CSSValueWebkitMarquee)
return true;
break;
case CSSPropertyOverflowY: // visible | hidden | scroll | auto | marquee | overlay | inherit | -webkit-paged-x | -webkit-paged-y
if (valueID == CSSValueVisible || valueID == CSSValueHidden || valueID == CSSValueScroll || valueID == CSSValueAuto || valueID == CSSValueOverlay || valueID == CSSValueWebkitMarquee || valueID == CSSValueWebkitPagedX || valueID == CSSValueWebkitPagedY)
return true;
break;
case CSSPropertyPageBreakAfter: // auto | always | avoid | left | right | inherit
case CSSPropertyPageBreakBefore:
case CSSPropertyWebkitColumnBreakAfter:
case CSSPropertyWebkitColumnBreakBefore:
if (valueID == CSSValueAuto || valueID == CSSValueAlways || valueID == CSSValueAvoid || valueID == CSSValueLeft || valueID == CSSValueRight)
return true;
break;
case CSSPropertyPageBreakInside: // avoid | auto | inherit
case CSSPropertyWebkitColumnBreakInside:
if (valueID == CSSValueAuto || valueID == CSSValueAvoid)
return true;
break;
case CSSPropertyPointerEvents:
// none | visiblePainted | visibleFill | visibleStroke | visible |
// painted | fill | stroke | auto | all | inherit
if (valueID == CSSValueVisible || valueID == CSSValueNone || valueID == CSSValueAll || valueID == CSSValueAuto || (valueID >= CSSValueVisiblepainted && valueID <= CSSValueStroke))
return true;
break;
case CSSPropertyPosition: // static | relative | absolute | fixed | sticky | inherit
if (valueID == CSSValueStatic || valueID == CSSValueRelative || valueID == CSSValueAbsolute || valueID == CSSValueFixed || valueID == CSSValueWebkitSticky)
return true;
break;
case CSSPropertyResize: // none | both | horizontal | vertical | auto
if (valueID == CSSValueNone || valueID == CSSValueBoth || valueID == CSSValueHorizontal || valueID == CSSValueVertical || valueID == CSSValueAuto)
return true;
break;
case CSSPropertySpeak: // none | normal | spell-out | digits | literal-punctuation | no-punctuation | inherit
if (valueID == CSSValueNone || valueID == CSSValueNormal || valueID == CSSValueSpellOut || valueID == CSSValueDigits || valueID == CSSValueLiteralPunctuation || valueID == CSSValueNoPunctuation)
return true;
break;
case CSSPropertyTableLayout: // auto | fixed | inherit
if (valueID == CSSValueAuto || valueID == CSSValueFixed)
return true;
break;
case CSSPropertyTextLineThroughMode:
case CSSPropertyTextOverlineMode:
case CSSPropertyTextUnderlineMode:
if (valueID == CSSValueContinuous || valueID == CSSValueSkipWhiteSpace)
return true;
break;
case CSSPropertyTextLineThroughStyle:
case CSSPropertyTextOverlineStyle:
case CSSPropertyTextUnderlineStyle:
if (valueID == CSSValueNone || valueID == CSSValueSolid || valueID == CSSValueDouble || valueID == CSSValueDashed || valueID == CSSValueDotDash || valueID == CSSValueDotDotDash || valueID == CSSValueWave)
return true;
break;
case CSSPropertyTextOverflow: // clip | ellipsis
if (valueID == CSSValueClip || valueID == CSSValueEllipsis)
return true;
break;
case CSSPropertyTextRendering: // auto | optimizeSpeed | optimizeLegibility | geometricPrecision
if (valueID == CSSValueAuto || valueID == CSSValueOptimizespeed || valueID == CSSValueOptimizelegibility || valueID == CSSValueGeometricprecision)
return true;
break;
case CSSPropertyTextTransform: // capitalize | uppercase | lowercase | none | inherit
if ((valueID >= CSSValueCapitalize && valueID <= CSSValueLowercase) || valueID == CSSValueNone)
return true;
break;
case CSSPropertyVisibility: // visible | hidden | collapse | inherit
if (valueID == CSSValueVisible || valueID == CSSValueHidden || valueID == CSSValueCollapse)
return true;
break;
case CSSPropertyWebkitAppearance:
if ((valueID >= CSSValueCheckbox && valueID <= CSSValueTextarea) || valueID == CSSValueNone)
return true;
break;
case CSSPropertyWebkitBackfaceVisibility:
if (valueID == CSSValueVisible || valueID == CSSValueHidden)
return true;
break;
#if ENABLE(CSS_COMPOSITING)
case CSSPropertyMixBlendMode:
if (parserContext.isCSSCompositingEnabled && (valueID == CSSValueNormal || valueID == CSSValueMultiply || valueID == CSSValueScreen
|| valueID == CSSValueOverlay || valueID == CSSValueDarken || valueID == CSSValueLighten || valueID == CSSValueColorDodge
|| valueID == CSSValueColorBurn || valueID == CSSValueHardLight || valueID == CSSValueSoftLight || valueID == CSSValueDifference
|| valueID == CSSValueExclusion))
return true;
break;
case CSSPropertyIsolation:
if (parserContext.isCSSCompositingEnabled && (valueID == CSSValueAuto || valueID == CSSValueIsolate))
return true;
break;
#endif
case CSSPropertyWebkitBorderFit:
if (valueID == CSSValueBorder || valueID == CSSValueLines)
return true;
break;
case CSSPropertyWebkitBoxAlign:
if (valueID == CSSValueStretch || valueID == CSSValueStart || valueID == CSSValueEnd || valueID == CSSValueCenter || valueID == CSSValueBaseline)
return true;
break;
#if ENABLE(CSS_BOX_DECORATION_BREAK)
case CSSPropertyWebkitBoxDecorationBreak:
if (valueID == CSSValueClone || valueID == CSSValueSlice)
return true;
break;
#endif
case CSSPropertyWebkitBoxDirection:
if (valueID == CSSValueNormal || valueID == CSSValueReverse)
return true;
break;
case CSSPropertyWebkitBoxLines:
if (valueID == CSSValueSingle || valueID == CSSValueMultiple)
return true;
break;
case CSSPropertyWebkitBoxOrient:
if (valueID == CSSValueHorizontal || valueID == CSSValueVertical || valueID == CSSValueInlineAxis || valueID == CSSValueBlockAxis)
return true;
break;
case CSSPropertyWebkitBoxPack:
if (valueID == CSSValueStart || valueID == CSSValueEnd || valueID == CSSValueCenter || valueID == CSSValueJustify)
return true;
break;
case CSSPropertyWebkitColorCorrection:
if (valueID == CSSValueSrgb || valueID == CSSValueDefault)
return true;
break;
case CSSPropertyWebkitColumnFill:
if (valueID == CSSValueAuto || valueID == CSSValueBalance)
return true;
break;
case CSSPropertyAlignContent:
// FIXME: Per CSS alignment, this property should accept an optional <overflow-position>. We should share this parsing code with 'justify-self'.
if (valueID == CSSValueFlexStart || valueID == CSSValueFlexEnd || valueID == CSSValueCenter || valueID == CSSValueSpaceBetween || valueID == CSSValueSpaceAround || valueID == CSSValueStretch)
return true;
break;
case CSSPropertyAlignItems:
// FIXME: Per CSS alignment, this property should accept the same arguments as 'justify-self' so we should share its parsing code.
if (valueID == CSSValueFlexStart || valueID == CSSValueFlexEnd || valueID == CSSValueCenter || valueID == CSSValueBaseline || valueID == CSSValueStretch)
return true;
break;
case CSSPropertyAlignSelf:
// FIXME: Per CSS alignment, this property should accept the same arguments as 'justify-self' so we should share its parsing code.
if (valueID == CSSValueAuto || valueID == CSSValueFlexStart || valueID == CSSValueFlexEnd || valueID == CSSValueCenter || valueID == CSSValueBaseline || valueID == CSSValueStretch)
return true;
break;
case CSSPropertyFlexDirection:
if (valueID == CSSValueRow || valueID == CSSValueRowReverse || valueID == CSSValueColumn || valueID == CSSValueColumnReverse)
return true;
break;
case CSSPropertyFlexWrap:
if (valueID == CSSValueNowrap || valueID == CSSValueWrap || valueID == CSSValueWrapReverse)
return true;
break;
case CSSPropertyJustifyContent:
// FIXME: Per CSS alignment, this property should accept an optional <overflow-position>. We should share this parsing code with 'justify-self'.
if (valueID == CSSValueFlexStart || valueID == CSSValueFlexEnd || valueID == CSSValueCenter || valueID == CSSValueSpaceBetween || valueID == CSSValueSpaceAround)
return true;
break;
case CSSPropertyWebkitJustifySelf:
if (valueID == CSSValueAuto || valueID == CSSValueFlexStart || valueID == CSSValueFlexEnd || valueID == CSSValueCenter || valueID == CSSValueBaseline || valueID == CSSValueStretch)
return true;
break;
case CSSPropertyWebkitFontKerning:
if (valueID == CSSValueAuto || valueID == CSSValueNormal || valueID == CSSValueNone)
return true;
break;
case CSSPropertyWebkitFontSmoothing:
if (valueID == CSSValueAuto || valueID == CSSValueNone || valueID == CSSValueAntialiased || valueID == CSSValueSubpixelAntialiased)
return true;
break;
case CSSPropertyWebkitHyphens:
if (valueID == CSSValueNone || valueID == CSSValueManual || valueID == CSSValueAuto)
return true;
break;
case CSSPropertyWebkitLineAlign:
if (valueID == CSSValueNone || valueID == CSSValueEdges)
return true;
break;
case CSSPropertyWebkitLineBreak: // auto | loose | normal | strict | after-white-space
if (valueID == CSSValueAuto || valueID == CSSValueLoose || valueID == CSSValueNormal || valueID == CSSValueStrict || valueID == CSSValueAfterWhiteSpace)
return true;
break;
case CSSPropertyWebkitLineSnap:
if (valueID == CSSValueNone || valueID == CSSValueBaseline || valueID == CSSValueContain)
return true;
break;
case CSSPropertyWebkitMarginAfterCollapse:
case CSSPropertyWebkitMarginBeforeCollapse:
case CSSPropertyWebkitMarginBottomCollapse:
case CSSPropertyWebkitMarginTopCollapse:
if (valueID == CSSValueCollapse || valueID == CSSValueSeparate || valueID == CSSValueDiscard)
return true;
break;
case CSSPropertyWebkitMarqueeDirection:
if (valueID == CSSValueForwards || valueID == CSSValueBackwards || valueID == CSSValueAhead || valueID == CSSValueReverse || valueID == CSSValueLeft || valueID == CSSValueRight || valueID == CSSValueDown
|| valueID == CSSValueUp || valueID == CSSValueAuto)
return true;
break;
case CSSPropertyWebkitMarqueeStyle:
if (valueID == CSSValueNone || valueID == CSSValueSlide || valueID == CSSValueScroll || valueID == CSSValueAlternate)
return true;
break;
case CSSPropertyWebkitNbspMode: // normal | space
if (valueID == CSSValueNormal || valueID == CSSValueSpace)
return true;
break;
#if ENABLE(ACCELERATED_OVERFLOW_SCROLLING)
case CSSPropertyWebkitOverflowScrolling:
if (valueID == CSSValueAuto || valueID == CSSValueTouch)
return true;
break;
#endif
case CSSPropertyWebkitPrintColorAdjust:
if (valueID == CSSValueExact || valueID == CSSValueEconomy)
return true;
break;
#if ENABLE(CSS_REGIONS)
case CSSPropertyWebkitRegionBreakAfter:
case CSSPropertyWebkitRegionBreakBefore:
if (parserContext.isCSSRegionsEnabled && (valueID == CSSValueAuto || valueID == CSSValueAlways || valueID == CSSValueAvoid || valueID == CSSValueLeft || valueID == CSSValueRight))
return true;
break;
case CSSPropertyWebkitRegionBreakInside:
if (parserContext.isCSSRegionsEnabled && (valueID == CSSValueAuto || valueID == CSSValueAvoid))
return true;
break;
case CSSPropertyWebkitRegionFragment:
if (parserContext.isCSSRegionsEnabled && (valueID == CSSValueAuto || valueID == CSSValueBreak))
return true;
break;
#endif
case CSSPropertyWebkitRtlOrdering:
if (valueID == CSSValueLogical || valueID == CSSValueVisual)
return true;
break;
case CSSPropertyWebkitRubyPosition:
if (valueID == CSSValueBefore || valueID == CSSValueAfter || valueID == CSSValueInterCharacter)
return true;
break;
#if ENABLE(CSS3_TEXT)
case CSSPropertyWebkitTextAlignLast:
// auto | start | end | left | right | center | justify
if ((valueID >= CSSValueLeft && valueID <= CSSValueJustify) || valueID == CSSValueStart || valueID == CSSValueEnd || valueID == CSSValueAuto)
return true;
break;
#endif // CSS3_TEXT
case CSSPropertyWebkitTextCombine:
if (valueID == CSSValueNone || valueID == CSSValueHorizontal)
return true;
break;
#if ENABLE(CSS3_TEXT)
case CSSPropertyWebkitTextJustify:
// auto | none | inter-word | distribute
if (valueID == CSSValueInterWord || valueID == CSSValueDistribute || valueID == CSSValueAuto || valueID == CSSValueNone)
return true;
break;
#endif // CSS3_TEXT
case CSSPropertyWebkitTextSecurity:
// disc | circle | square | none | inherit
if (valueID == CSSValueDisc || valueID == CSSValueCircle || valueID == CSSValueSquare || valueID == CSSValueNone)
return true;
break;
#if ENABLE(IOS_TEXT_AUTOSIZING)
case CSSPropertyWebkitTextSizeAdjust:
if (valueID == CSSValueAuto || valueID == CSSValueNone)
return true;
break;
#endif
case CSSPropertyWebkitTransformStyle:
if (valueID == CSSValueFlat || valueID == CSSValuePreserve3d)
return true;
break;
case CSSPropertyWebkitUserDrag: // auto | none | element
if (valueID == CSSValueAuto || valueID == CSSValueNone || valueID == CSSValueElement)
return true;
break;
case CSSPropertyWebkitUserModify: // read-only | read-write
if (valueID == CSSValueReadOnly || valueID == CSSValueReadWrite || valueID == CSSValueReadWritePlaintextOnly)
return true;
break;
case CSSPropertyWebkitUserSelect: // auto | none | text | all
if (valueID == CSSValueAuto || valueID == CSSValueNone || valueID == CSSValueText || valueID == CSSValueAll)
return true;
break;
case CSSPropertyWebkitWritingMode:
if (valueID >= CSSValueHorizontalTb && valueID <= CSSValueHorizontalBt)
return true;
break;
case CSSPropertyWhiteSpace: // normal | pre | nowrap | inherit
if (valueID == CSSValueNormal || valueID == CSSValuePre || valueID == CSSValuePreWrap || valueID == CSSValuePreLine || valueID == CSSValueNowrap)
return true;
break;
case CSSPropertyWordBreak: // normal | break-all | break-word (this is a custom extension)
if (valueID == CSSValueNormal || valueID == CSSValueBreakAll || valueID == CSSValueBreakWord)
return true;
break;
default:
ASSERT_NOT_REACHED();
return false;
}
#if !ENABLE(CSS_COMPOSITING) && !ENABLE(CSS_REGIONS)
UNUSED_PARAM(parserContext);
#endif
return false;
}
static inline bool isKeywordPropertyID(CSSPropertyID propertyId)
{
switch (propertyId) {
case CSSPropertyBorderBottomStyle:
case CSSPropertyBorderCollapse:
case CSSPropertyBorderLeftStyle:
case CSSPropertyBorderRightStyle:
case CSSPropertyBorderTopStyle:
case CSSPropertyBoxSizing:
case CSSPropertyCaptionSide:
case CSSPropertyClear:
case CSSPropertyDirection:
case CSSPropertyDisplay:
case CSSPropertyEmptyCells:
case CSSPropertyFloat:
case CSSPropertyFontStyle:
case CSSPropertyImageRendering:
case CSSPropertyListStylePosition:
case CSSPropertyListStyleType:
case CSSPropertyObjectFit:
case CSSPropertyOutlineStyle:
case CSSPropertyOverflowWrap:
case CSSPropertyOverflowX:
case CSSPropertyOverflowY:
case CSSPropertyPageBreakAfter:
case CSSPropertyPageBreakBefore:
case CSSPropertyPageBreakInside:
case CSSPropertyPointerEvents:
case CSSPropertyPosition:
case CSSPropertyResize:
case CSSPropertySpeak:
case CSSPropertyTableLayout:
case CSSPropertyTextLineThroughMode:
case CSSPropertyTextLineThroughStyle:
case CSSPropertyTextOverflow:
case CSSPropertyTextOverlineMode:
case CSSPropertyTextOverlineStyle:
case CSSPropertyTextRendering:
case CSSPropertyTextTransform:
case CSSPropertyTextUnderlineMode:
case CSSPropertyTextUnderlineStyle:
case CSSPropertyVisibility:
case CSSPropertyWebkitAppearance:
#if ENABLE(CSS_COMPOSITING)
case CSSPropertyMixBlendMode:
case CSSPropertyIsolation:
#endif
case CSSPropertyWebkitBackfaceVisibility:
case CSSPropertyWebkitBorderAfterStyle:
case CSSPropertyWebkitBorderBeforeStyle:
case CSSPropertyWebkitBorderEndStyle:
case CSSPropertyWebkitBorderFit:
case CSSPropertyWebkitBorderStartStyle:
case CSSPropertyWebkitBoxAlign:
#if ENABLE(CSS_BOX_DECORATION_BREAK)
case CSSPropertyWebkitBoxDecorationBreak:
#endif
case CSSPropertyWebkitBoxDirection:
case CSSPropertyWebkitBoxLines:
case CSSPropertyWebkitBoxOrient:
case CSSPropertyWebkitBoxPack:
case CSSPropertyWebkitColorCorrection:
case CSSPropertyWebkitColumnBreakAfter:
case CSSPropertyWebkitColumnBreakBefore:
case CSSPropertyWebkitColumnBreakInside:
case CSSPropertyWebkitColumnFill:
case CSSPropertyWebkitColumnRuleStyle:
case CSSPropertyAlignContent:
case CSSPropertyAlignItems:
case CSSPropertyAlignSelf:
case CSSPropertyFlexDirection:
case CSSPropertyFlexWrap:
case CSSPropertyJustifyContent:
case CSSPropertyWebkitFontKerning:
case CSSPropertyWebkitFontSmoothing:
case CSSPropertyWebkitHyphens:
case CSSPropertyWebkitLineAlign:
case CSSPropertyWebkitLineBreak:
case CSSPropertyWebkitLineSnap:
case CSSPropertyWebkitMarginAfterCollapse:
case CSSPropertyWebkitMarginBeforeCollapse:
case CSSPropertyWebkitMarginBottomCollapse:
case CSSPropertyWebkitMarginTopCollapse:
case CSSPropertyWebkitMarqueeDirection:
case CSSPropertyWebkitMarqueeStyle:
case CSSPropertyWebkitNbspMode:
#if ENABLE(ACCELERATED_OVERFLOW_SCROLLING)
case CSSPropertyWebkitOverflowScrolling:
#endif
case CSSPropertyWebkitPrintColorAdjust:
#if ENABLE(CSS_REGIONS)
case CSSPropertyWebkitRegionBreakAfter:
case CSSPropertyWebkitRegionBreakBefore:
case CSSPropertyWebkitRegionBreakInside:
case CSSPropertyWebkitRegionFragment:
#endif
case CSSPropertyWebkitRtlOrdering:
case CSSPropertyWebkitRubyPosition:
#if ENABLE(CSS3_TEXT)
case CSSPropertyWebkitTextAlignLast:
#endif // CSS3_TEXT
case CSSPropertyWebkitTextCombine:
#if ENABLE(CSS3_TEXT)
case CSSPropertyWebkitTextJustify:
#endif // CSS3_TEXT
case CSSPropertyWebkitTextSecurity:
case CSSPropertyWebkitTransformStyle:
case CSSPropertyWebkitUserDrag:
case CSSPropertyWebkitUserModify:
case CSSPropertyWebkitUserSelect:
case CSSPropertyWebkitWritingMode:
case CSSPropertyWhiteSpace:
case CSSPropertyWordBreak:
case CSSPropertyWordWrap:
#if ENABLE(CSS_SCROLL_SNAP)
case CSSPropertyWebkitScrollSnapType:
#endif
return true;
default:
return false;
}
}
static bool parseKeywordValue(MutableStyleProperties* declaration, CSSPropertyID propertyId, const String& string, bool important, const CSSParserContext& parserContext)
{
ASSERT(!string.isEmpty());
if (!isKeywordPropertyID(propertyId)) {
// All properties accept the values of "initial" and "inherit".
String lowerCaseString = string.lower();
if (lowerCaseString != "initial" && lowerCaseString != "inherit")
return false;
// Parse initial/inherit shorthands using the CSSParser.
if (shorthandForProperty(propertyId).length())
return false;
}
CSSParserString cssString;
cssString.init(string);
CSSValueID valueID = cssValueKeywordID(cssString);
if (!valueID)
return false;
RefPtr<CSSValue> value;
if (valueID == CSSValueInherit)
value = cssValuePool().createInheritedValue();
else if (valueID == CSSValueInitial)
value = cssValuePool().createExplicitInitialValue();
else if (isValidKeywordPropertyAndValue(propertyId, valueID, parserContext))
value = cssValuePool().createIdentifierValue(valueID);
else
return false;
declaration->addParsedProperty(CSSProperty(propertyId, value.release(), important));
return true;
}
template <typename CharacterType>
static bool parseTransformTranslateArguments(WebKitCSSTransformValue* transformValue, CharacterType* characters, unsigned length, unsigned start, unsigned expectedCount)
{
while (expectedCount) {
size_t end = WTF::find(characters, length, expectedCount == 1 ? ')' : ',', start);
if (end == notFound || (expectedCount == 1 && end != length - 1))
return false;
unsigned argumentLength = end - start;
CSSPrimitiveValue::UnitTypes unit = CSSPrimitiveValue::CSS_NUMBER;
double number;
if (!parseSimpleLength(characters + start, argumentLength, unit, number))
return false;
if (unit != CSSPrimitiveValue::CSS_PX && (number || unit != CSSPrimitiveValue::CSS_NUMBER))
return false;
transformValue->append(cssValuePool().createValue(number, CSSPrimitiveValue::CSS_PX));
start = end + 1;
--expectedCount;
}
return true;
}
static bool parseTranslateTransformValue(MutableStyleProperties* properties, CSSPropertyID propertyID, const String& string, bool important)
{
if (propertyID != CSSPropertyWebkitTransform)
return false;
static const unsigned shortestValidTransformStringLength = 12;
static const unsigned likelyMultipartTransformStringLengthCutoff = 32;
if (string.length() < shortestValidTransformStringLength || string.length() > likelyMultipartTransformStringLengthCutoff)
return false;
if (!string.startsWith("translate", false))
return false;
UChar c9 = toASCIILower(string[9]);
UChar c10 = toASCIILower(string[10]);
WebKitCSSTransformValue::TransformOperationType transformType;
unsigned expectedArgumentCount = 1;
unsigned argumentStart = 11;
if (c9 == 'x' && c10 == '(')
transformType = WebKitCSSTransformValue::TranslateXTransformOperation;
else if (c9 == 'y' && c10 == '(')
transformType = WebKitCSSTransformValue::TranslateYTransformOperation;
else if (c9 == 'z' && c10 == '(')
transformType = WebKitCSSTransformValue::TranslateZTransformOperation;
else if (c9 == '(') {
transformType = WebKitCSSTransformValue::TranslateTransformOperation;
expectedArgumentCount = 2;
argumentStart = 10;
} else if (c9 == '3' && c10 == 'd' && string[11] == '(') {
transformType = WebKitCSSTransformValue::Translate3DTransformOperation;
expectedArgumentCount = 3;
argumentStart = 12;
} else
return false;
RefPtr<WebKitCSSTransformValue> transformValue = WebKitCSSTransformValue::create(transformType);
bool success;
if (string.is8Bit())
success = parseTransformTranslateArguments(transformValue.get(), string.characters8(), string.length(), argumentStart, expectedArgumentCount);
else
success = parseTransformTranslateArguments(transformValue.get(), string.characters16(), string.length(), argumentStart, expectedArgumentCount);
if (!success)
return false;
RefPtr<CSSValueList> result = CSSValueList::createSpaceSeparated();
result->append(transformValue.releaseNonNull());
properties->addParsedProperty(CSSProperty(CSSPropertyWebkitTransform, result.release(), important));
return true;
}
PassRefPtr<CSSValueList> CSSParser::parseFontFaceValue(const AtomicString& string)
{
if (string.isEmpty())
return 0;
RefPtr<MutableStyleProperties> dummyStyle = MutableStyleProperties::create();
if (!parseValue(dummyStyle.get(), CSSPropertyFontFamily, string, false, CSSQuirksMode, 0))
return 0;
RefPtr<CSSValue> fontFamily = dummyStyle->getPropertyCSSValue(CSSPropertyFontFamily);
if (!fontFamily->isValueList())
return 0; // FIXME: "initial" and "inherit" should be parsed as font names in the face attribute.
return static_pointer_cast<CSSValueList>(fontFamily.release());
}
bool CSSParser::parseValue(MutableStyleProperties* declaration, CSSPropertyID propertyID, const String& string, bool important, CSSParserMode cssParserMode, StyleSheetContents* contextStyleSheet)
{
ASSERT(!string.isEmpty());
if (parseSimpleLengthValue(declaration, propertyID, string, important, cssParserMode))
return true;
if (parseColorValue(declaration, propertyID, string, important, cssParserMode))
return true;
CSSParserContext context(cssParserMode);
if (contextStyleSheet) {
context = contextStyleSheet->parserContext();
context.mode = cssParserMode;
}
if (parseKeywordValue(declaration, propertyID, string, important, context))
return true;
if (parseTranslateTransformValue(declaration, propertyID, string, important))
return true;
CSSParser parser(context);
return parser.parseValue(declaration, propertyID, string, important, contextStyleSheet);
}
bool CSSParser::parseValue(MutableStyleProperties* declaration, CSSPropertyID propertyID, const String& string, bool important, StyleSheetContents* contextStyleSheet)
{
setStyleSheet(contextStyleSheet);
setupParser("@-webkit-value{", string, "} ");
m_id = propertyID;
m_important = important;
cssyyparse(this);
m_rule = 0;
bool ok = false;
if (m_hasFontFaceOnlyValues)
deleteFontFaceOnlyValues();
if (!m_parsedProperties.isEmpty()) {
ok = true;
declaration->addParsedProperties(m_parsedProperties);
clearProperties();
}
return ok;
}
// The color will only be changed when string contains a valid CSS color, so callers
// can set it to a default color and ignore the boolean result.
bool CSSParser::parseColor(RGBA32& color, const String& string, bool strict)
{
// First try creating a color specified by name, rgba(), rgb() or "#" syntax.
if (fastParseColor(color, string, strict))
return true;
CSSParser parser(CSSStrictMode);
// In case the fast-path parser didn't understand the color, try the full parser.
if (!parser.parseColor(string))
return false;
CSSValue* value = parser.m_parsedProperties.first().value();
if (!is<CSSPrimitiveValue>(*value))
return false;
CSSPrimitiveValue& primitiveValue = downcast<CSSPrimitiveValue>(*value);
if (!primitiveValue.isRGBColor())
return false;
color = primitiveValue.getRGBA32Value();
return true;
}
bool CSSParser::parseColor(const String& string)
{
setupParser("@-webkit-decls{color:", string, "} ");
cssyyparse(this);
m_rule = 0;
return !m_parsedProperties.isEmpty() && m_parsedProperties.first().id() == CSSPropertyColor;
}
bool CSSParser::parseSystemColor(RGBA32& color, const String& string, Document* document)
{
if (!document || !document->page())
return false;
CSSParserString cssColor;
cssColor.init(string);
CSSValueID id = cssValueKeywordID(cssColor);
if (!validPrimitiveValueColor(id))
return false;
Color parsedColor = document->page()->theme().systemColor(id);
if (!parsedColor.isValid())
return false;
color = parsedColor.rgb();
return true;
}
void CSSParser::parseSelector(const String& string, CSSSelectorList& selectorList)
{
m_selectorListForParseSelector = &selectorList;
setupParser("@-webkit-selector{", string, "}");
cssyyparse(this);
m_selectorListForParseSelector = 0;
}
PassRef<ImmutableStyleProperties> CSSParser::parseInlineStyleDeclaration(const String& string, Element* element)
{
CSSParserContext context = element->document().elementSheet().contents().parserContext();
context.mode = strictToCSSParserMode(element->isHTMLElement() && !element->document().inQuirksMode());
return CSSParser(context).parseDeclaration(string, &element->document().elementSheet().contents());
}
PassRef<ImmutableStyleProperties> CSSParser::parseDeclaration(const String& string, StyleSheetContents* contextStyleSheet)
{
setStyleSheet(contextStyleSheet);
setupParser("@-webkit-decls{", string, "} ");
cssyyparse(this);
m_rule = 0;
if (m_hasFontFaceOnlyValues)
deleteFontFaceOnlyValues();
PassRef<ImmutableStyleProperties> style = createStyleProperties();
clearProperties();
return style;
}
bool CSSParser::parseDeclaration(MutableStyleProperties* declaration, const String& string, PassRefPtr<CSSRuleSourceData> prpRuleSourceData, StyleSheetContents* contextStyleSheet)
{
// Length of the "@-webkit-decls{" prefix.
static const unsigned prefixLength = 15;
setStyleSheet(contextStyleSheet);
RefPtr<CSSRuleSourceData> ruleSourceData = prpRuleSourceData;
if (ruleSourceData) {
m_currentRuleDataStack = std::make_unique<RuleSourceDataList>();
m_currentRuleDataStack->append(ruleSourceData);
}
setupParser("@-webkit-decls{", string, "} ");
cssyyparse(this);
m_rule = 0;
bool ok = false;
if (m_hasFontFaceOnlyValues)
deleteFontFaceOnlyValues();
if (!m_parsedProperties.isEmpty()) {
ok = true;
declaration->addParsedProperties(m_parsedProperties);
clearProperties();
}
if (ruleSourceData) {
ASSERT(m_currentRuleDataStack->size() == 1);
ruleSourceData->ruleBodyRange.start = 0;
ruleSourceData->ruleBodyRange.end = string.length();
for (size_t i = 0, size = ruleSourceData->styleSourceData->propertyData.size(); i < size; ++i) {
CSSPropertySourceData& propertyData = ruleSourceData->styleSourceData->propertyData.at(i);
propertyData.range.start -= prefixLength;
propertyData.range.end -= prefixLength;
}
fixUnparsedPropertyRanges(ruleSourceData.get());
m_currentRuleDataStack.reset();
}
return ok;
}
std::unique_ptr<MediaQuery> CSSParser::parseMediaQuery(const String& string)
{
if (string.isEmpty())
return nullptr;
ASSERT(!m_mediaQuery);
// can't use { because tokenizer state switches from mediaquery to initial state when it sees { token.
// instead insert one " " (which is WHITESPACE in CSSGrammar.y)
setupParser("@-webkit-mediaquery ", string, "} ");
cssyyparse(this);
return WTF::move(m_mediaQuery);
}
#if ENABLE(PICTURE_SIZES)
std::unique_ptr<SourceSizeList> CSSParser::parseSizesAttribute(const String& string)
{
if (string.isEmpty())
return nullptr;
ASSERT(!m_sourceSizeList.get());
setupParser("@-webkit-sizesattr ", string, "}");
cssyyparse(this);
return WTF::move(m_sourceSizeList);
}
#endif
static inline void filterProperties(bool important, const CSSParser::ParsedPropertyVector& input, Vector<CSSProperty, 256>& output, size_t& unusedEntries, std::bitset<numCSSProperties>& seenProperties)
{
// Add properties in reverse order so that highest priority definitions are reached first. Duplicate definitions can then be ignored when found.
for (int i = input.size() - 1; i >= 0; --i) {
const CSSProperty& property = input[i];
if (property.isImportant() != important)
continue;
const unsigned propertyIDIndex = property.id() - firstCSSProperty;
ASSERT(propertyIDIndex < seenProperties.size());
if (seenProperties[propertyIDIndex])
continue;
seenProperties.set(propertyIDIndex);
output[--unusedEntries] = property;
}
}
PassRef<ImmutableStyleProperties> CSSParser::createStyleProperties()
{
std::bitset<numCSSProperties> seenProperties;
size_t unusedEntries = m_parsedProperties.size();
Vector<CSSProperty, 256> results(unusedEntries);
// Important properties have higher priority, so add them first. Duplicate definitions can then be ignored when found.
filterProperties(true, m_parsedProperties, results, unusedEntries, seenProperties);
filterProperties(false, m_parsedProperties, results, unusedEntries, seenProperties);
if (unusedEntries)
results.remove(0, unusedEntries);
return ImmutableStyleProperties::create(results.data(), results.size(), m_context.mode);
}
void CSSParser::addPropertyWithPrefixingVariant(CSSPropertyID propId, PassRefPtr<CSSValue> value, bool important, bool implicit)
{
RefPtr<CSSValue> val = value.get();
addProperty(propId, value, important, implicit);
CSSPropertyID prefixingVariant = prefixingVariantForPropertyId(propId);
if (prefixingVariant == propId)
return;
if (m_currentShorthand) {
// We can't use ShorthandScope here as we can already be inside one (e.g we are parsing CSSTransition).
m_currentShorthand = prefixingVariantForPropertyId(m_currentShorthand);
addProperty(prefixingVariant, val.release(), important, implicit);
m_currentShorthand = prefixingVariantForPropertyId(m_currentShorthand);
} else
addProperty(prefixingVariant, val.release(), important, implicit);
}
void CSSParser::addProperty(CSSPropertyID propId, PassRefPtr<CSSValue> value, bool important, bool implicit)
{
// This property doesn't belong to a shorthand or is a CSS variable (which will be resolved later).
if (!m_currentShorthand) {
m_parsedProperties.append(CSSProperty(propId, value, important, false, CSSPropertyInvalid, m_implicitShorthand || implicit));
return;
}
Vector<StylePropertyShorthand> shorthands = matchingShorthandsForLonghand(propId);
if (shorthands.size() == 1)
m_parsedProperties.append(CSSProperty(propId, value, important, true, CSSPropertyInvalid, m_implicitShorthand || implicit));
else
m_parsedProperties.append(CSSProperty(propId, value, important, true, indexOfShorthandForLonghand(m_currentShorthand, shorthands), m_implicitShorthand || implicit));
}
void CSSParser::rollbackLastProperties(int num)
{
ASSERT(num >= 0);
ASSERT(m_parsedProperties.size() >= static_cast<unsigned>(num));
m_parsedProperties.shrink(m_parsedProperties.size() - num);
}
void CSSParser::clearProperties()
{
m_parsedProperties.clear();
m_numParsedPropertiesBeforeMarginBox = INVALID_NUM_PARSED_PROPERTIES;
m_hasFontFaceOnlyValues = false;
}
URL CSSParser::completeURL(const CSSParserContext& context, const String& url)
{
if (url.isNull())
return URL();
if (context.charset.isEmpty())
return URL(context.baseURL, url);
return URL(context.baseURL, url, context.charset);
}
URL CSSParser::completeURL(const String& url) const
{
return completeURL(m_context, url);
}
bool CSSParser::validCalculationUnit(CSSParserValue* value, Units unitflags, ReleaseParsedCalcValueCondition releaseCalc)
{
bool mustBeNonNegative = unitflags & FNonNeg;
if (!parseCalculation(value, mustBeNonNegative ? CalculationRangeNonNegative : CalculationRangeAll))
return false;
bool b = false;
switch (m_parsedCalculation->category()) {
case CalcNumber:
b = (unitflags & FNumber);
if (!b && (unitflags & FInteger) && m_parsedCalculation->isInt())
b = true;
if (b && mustBeNonNegative && m_parsedCalculation->isNegative())
b = false;
break;
case CalcLength:
b = (unitflags & FLength);
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 CSSParser::shouldAcceptUnitLessValues(CSSParserValue* value, Units unitflags, CSSParserMode cssParserMode)
{
// Qirks mode and svg presentation attributes accept unit less values.
return (unitflags & (FLength | FAngle | FTime)) && (!value->fValue || cssParserMode == CSSQuirksMode || cssParserMode == SVGAttributeMode);
}
bool CSSParser::validUnit(CSSParserValue* value, Units unitflags, CSSParserMode cssParserMode, ReleaseParsedCalcValueCondition releaseCalc)
{
if (isCalculation(value))
return validCalculationUnit(value, unitflags, releaseCalc);
bool b = false;
switch (value->unit) {
case CSSPrimitiveValue::CSS_NUMBER:
b = (unitflags & FNumber);
if (!b && shouldAcceptUnitLessValues(value, unitflags, cssParserMode)) {
value->unit = (unitflags & FLength) ? CSSPrimitiveValue::CSS_PX :
((unitflags & FAngle) ? CSSPrimitiveValue::CSS_DEG : CSSPrimitiveValue::CSS_MS);
b = true;
}
if (!b && (unitflags & FInteger) && value->isInt)
b = true;
if (!b && (unitflags & FPositiveInteger) && value->isInt && value->fValue > 0)
b = true;
break;
case CSSPrimitiveValue::CSS_PERCENTAGE:
b = (unitflags & FPercent);
break;
case CSSParserValue::Q_EMS:
case CSSPrimitiveValue::CSS_EMS:
case CSSPrimitiveValue::CSS_REMS:
case CSSPrimitiveValue::CSS_CHS:
case CSSPrimitiveValue::CSS_EXS:
case CSSPrimitiveValue::CSS_PX:
case CSSPrimitiveValue::CSS_CM:
case CSSPrimitiveValue::CSS_MM:
case CSSPrimitiveValue::CSS_IN:
case CSSPrimitiveValue::CSS_PT:
case CSSPrimitiveValue::CSS_PC:
case CSSPrimitiveValue::CSS_VW:
case CSSPrimitiveValue::CSS_VH:
case CSSPrimitiveValue::CSS_VMIN:
case CSSPrimitiveValue::CSS_VMAX:
b = (unitflags & FLength);
break;
case CSSPrimitiveValue::CSS_MS:
case CSSPrimitiveValue::CSS_S:
b = (unitflags & FTime);
break;
case CSSPrimitiveValue::CSS_DEG:
case CSSPrimitiveValue::CSS_RAD:
case CSSPrimitiveValue::CSS_GRAD:
case CSSPrimitiveValue::CSS_TURN:
b = (unitflags & FAngle);
break;
#if ENABLE(CSS_IMAGE_RESOLUTION) || ENABLE(RESOLUTION_MEDIA_QUERY)
case CSSPrimitiveValue::CSS_DPPX:
case CSSPrimitiveValue::CSS_DPI:
case CSSPrimitiveValue::CSS_DPCM:
b = (unitflags & FResolution);
break;
#endif
case CSSPrimitiveValue::CSS_HZ:
case CSSPrimitiveValue::CSS_KHZ:
case CSSPrimitiveValue::CSS_DIMENSION:
default:
break;
}
if (b && unitflags & FNonNeg && value->fValue < 0)
b = false;
return b;
}
inline PassRef<CSSPrimitiveValue> CSSParser::createPrimitiveNumericValue(CSSParserValue* value)
{
if (m_parsedCalculation) {
ASSERT(isCalculation(value));
return CSSPrimitiveValue::create(m_parsedCalculation.release());
}
#if ENABLE(CSS_IMAGE_RESOLUTION) || ENABLE(RESOLUTION_MEDIA_QUERY)
ASSERT((value->unit >= CSSPrimitiveValue::CSS_NUMBER && value->unit <= CSSPrimitiveValue::CSS_KHZ)
|| (value->unit >= CSSPrimitiveValue::CSS_TURN && value->unit <= CSSPrimitiveValue::CSS_CHS)
|| (value->unit >= CSSPrimitiveValue::CSS_VW && value->unit <= CSSPrimitiveValue::CSS_VMAX)
|| (value->unit >= CSSPrimitiveValue::CSS_DPPX && value->unit <= CSSPrimitiveValue::CSS_DPCM));
#else
ASSERT((value->unit >= CSSPrimitiveValue::CSS_NUMBER && value->unit <= CSSPrimitiveValue::CSS_KHZ)
|| (value->unit >= CSSPrimitiveValue::CSS_TURN && value->unit <= CSSPrimitiveValue::CSS_CHS)
|| (value->unit >= CSSPrimitiveValue::CSS_VW && value->unit <= CSSPrimitiveValue::CSS_VMAX));
#endif
return cssValuePool().createValue(value->fValue, static_cast<CSSPrimitiveValue::UnitTypes>(value->unit));
}
inline PassRef<CSSPrimitiveValue> CSSParser::createPrimitiveStringValue(CSSParserValue* value)
{
ASSERT(value->unit == CSSPrimitiveValue::CSS_STRING || value->unit == CSSPrimitiveValue::CSS_IDENT);
return cssValuePool().createValue(value->string, CSSPrimitiveValue::CSS_STRING);
}
static inline bool isComma(CSSParserValue* value)
{
return value && value->unit == CSSParserValue::Operator && value->iValue == ',';
}
static inline bool isForwardSlashOperator(CSSParserValue* value)
{
ASSERT(value);
return value->unit == CSSParserValue::Operator && value->iValue == '/';
}
bool CSSParser::validWidth(CSSParserValue* value)
{
int id = value->id;
if (id == CSSValueIntrinsic || id == CSSValueMinIntrinsic || id == CSSValueWebkitMinContent || id == CSSValueWebkitMaxContent || id == CSSValueWebkitFillAvailable || id == CSSValueWebkitFitContent)
return true;
return !id && validUnit(value, FLength | FPercent | FNonNeg);
}
// FIXME: Combine this with validWidth when we support fit-content, et al, for heights.
bool CSSParser::validHeight(CSSParserValue* value)
{
int id = value->id;
if (id == CSSValueIntrinsic || id == CSSValueMinIntrinsic)
return true;
return !id && validUnit(value, FLength | FPercent | FNonNeg);
}
inline PassRefPtr<CSSPrimitiveValue> CSSParser::parseValidPrimitive(CSSValueID identifier, CSSParserValue* value)
{
if (identifier)
return cssValuePool().createIdentifierValue(identifier);
if (value->unit == CSSPrimitiveValue::CSS_STRING)
return createPrimitiveStringValue(value);
if (value->unit >= CSSPrimitiveValue::CSS_NUMBER && value->unit <= CSSPrimitiveValue::CSS_KHZ)
return createPrimitiveNumericValue(value);
if (value->unit >= CSSPrimitiveValue::CSS_TURN && value->unit <= CSSPrimitiveValue::CSS_CHS)
return createPrimitiveNumericValue(value);
if (value->unit >= CSSPrimitiveValue::CSS_VW && value->unit <= CSSPrimitiveValue::CSS_VMAX)
return createPrimitiveNumericValue(value);
#if ENABLE(CSS_IMAGE_RESOLUTION) || ENABLE(RESOLUTION_MEDIA_QUERY)
if (value->unit >= CSSPrimitiveValue::CSS_DPPX && value->unit <= CSSPrimitiveValue::CSS_DPCM)
return createPrimitiveNumericValue(value);
#endif
if (value->unit >= CSSParserValue::Q_EMS)
return CSSPrimitiveValue::createAllowingMarginQuirk(value->fValue, CSSPrimitiveValue::CSS_EMS);
if (isCalculation(value))
return CSSPrimitiveValue::create(m_parsedCalculation.release());
return 0;
}
void CSSParser::addExpandedPropertyForValue(CSSPropertyID propId, PassRefPtr<CSSValue> prpValue, bool important)
{
const StylePropertyShorthand& shorthand = shorthandForProperty(propId);
unsigned shorthandLength = shorthand.length();
if (!shorthandLength) {
addProperty(propId, prpValue, important);
return;
}
RefPtr<CSSValue> value = prpValue;
ShorthandScope scope(this, propId);
const CSSPropertyID* longhands = shorthand.properties();
for (unsigned i = 0; i < shorthandLength; ++i)
addProperty(longhands[i], value, important);
}
bool CSSParser::parseValue(CSSPropertyID propId, bool important)
{
if (!m_valueList)
return false;
CSSParserValue* value = m_valueList->current();
if (!value)
return false;
// Note: m_parsedCalculation is used to pass the calc value to validUnit and then cleared at the end of this function.
// FIXME: This is to avoid having to pass parsedCalc to all validUnit callers.
ASSERT(!m_parsedCalculation);
CSSValueID id = value->id;
unsigned num = inShorthand() ? 1 : m_valueList->size();
if (id == CSSValueInherit) {
if (num != 1)
return false;
addExpandedPropertyForValue(propId, cssValuePool().createInheritedValue(), important);
return true;
}
else if (id == CSSValueInitial) {
if (num != 1)
return false;
addExpandedPropertyForValue(propId, cssValuePool().createExplicitInitialValue(), important);
return true;
}
if (isKeywordPropertyID(propId)) {
if (!isValidKeywordPropertyAndValue(propId, id, m_context))
return false;
if (m_valueList->next() && !inShorthand())
return false;
addProperty(propId, cssValuePool().createIdentifierValue(id), important);
return true;
}
#if ENABLE(CSS_DEVICE_ADAPTATION)
if (inViewport())
return parseViewportProperty(propId, important);
#endif
bool validPrimitive = false;
RefPtr<CSSValue> parsedValue;
switch (propId) {
case CSSPropertySize: // <length>{1,2} | auto | [ <page-size> || [ portrait | landscape] ]
return parseSize(propId, important);
case CSSPropertyQuotes: // [<string> <string>]+ | none | inherit
if (id)
validPrimitive = true;
else
return parseQuotes(propId, important);
break;
case CSSPropertyUnicodeBidi: // normal | embed | bidi-override | isolate | isolate-override | plaintext | inherit
if (id == CSSValueNormal
|| id == CSSValueEmbed
|| id == CSSValueBidiOverride
|| id == CSSValueWebkitIsolate
|| id == CSSValueWebkitIsolateOverride
|| id == CSSValueWebkitPlaintext)
validPrimitive = true;
break;
case CSSPropertyContent: // [ <string> | <uri> | <counter> | attr(X) | open-quote |
// close-quote | no-open-quote | no-close-quote ]+ | inherit
return parseContent(propId, important);
case CSSPropertyWebkitAlt: // [ <string> | attr(X) ]
return parseAlt(propId, important);
case CSSPropertyClip: // <shape> | auto | inherit
if (id == CSSValueAuto)
validPrimitive = true;
else if (value->unit == CSSParserValue::Function)
return parseClipShape(propId, important);
break;
/* Start of supported CSS properties with validation. This is needed for parseShorthand to work
* correctly and allows optimization in WebCore::applyRule(..)
*/
case CSSPropertyOverflow: {
ShorthandScope scope(this, propId);
if (num != 1 || !parseValue(CSSPropertyOverflowY, important))
return false;
RefPtr<CSSValue> overflowXValue;
// FIXME: -webkit-paged-x or -webkit-paged-y only apply to overflow-y. If this value has been
// set using the shorthand, then for now overflow-x will default to auto, but once we implement
// pagination controls, it should default to hidden. If the overflow-y value is anything but
// paged-x or paged-y, then overflow-x and overflow-y should have the same value.
if (id == CSSValueWebkitPagedX || id == CSSValueWebkitPagedY)
overflowXValue = cssValuePool().createIdentifierValue(CSSValueAuto);
else
overflowXValue = m_parsedProperties.last().value();
addProperty(CSSPropertyOverflowX, overflowXValue.release(), important);
return true;
}
case CSSPropertyTextAlign:
// left | right | center | justify | -webkit-left | -webkit-right | -webkit-center | -webkit-match-parent
// | start | end | inherit | -webkit-auto (converted to start)
// NOTE: <string> is not supported.
if ((id >= CSSValueWebkitAuto && id <= CSSValueWebkitMatchParent) || id == CSSValueStart || id == CSSValueEnd)
validPrimitive = true;
break;
case CSSPropertyFontWeight: { // normal | bold | bolder | lighter | 100 | 200 | 300 | 400 | 500 | 600 | 700 | 800 | 900 | inherit
if (m_valueList->size() != 1)
return false;
return parseFontWeight(important);
}
case CSSPropertyBorderSpacing: {
if (num == 1) {
ShorthandScope scope(this, CSSPropertyBorderSpacing);
if (!parseValue(CSSPropertyWebkitBorderHorizontalSpacing, important))
return false;
CSSValue* value = m_parsedProperties.last().value();
addProperty(CSSPropertyWebkitBorderVerticalSpacing, value, important);
return true;
}
else if (num == 2) {
ShorthandScope scope(this, CSSPropertyBorderSpacing);
if (!parseValue(CSSPropertyWebkitBorderHorizontalSpacing, important) || !parseValue(CSSPropertyWebkitBorderVerticalSpacing, important))
return false;
return true;
}
return false;
}
case CSSPropertyWebkitBorderHorizontalSpacing:
case CSSPropertyWebkitBorderVerticalSpacing:
validPrimitive = validUnit(value, FLength | FNonNeg);
break;
case CSSPropertyOutlineColor: // <color> | invert | inherit
// Outline color has "invert" as additional keyword.
// Also, we want to allow the special focus color even in strict parsing mode.
if (id == CSSValueInvert || id == CSSValueWebkitFocusRingColor) {
validPrimitive = true;
break;
}
FALLTHROUGH;
case CSSPropertyBackgroundColor: // <color> | inherit
case CSSPropertyBorderTopColor: // <color> | inherit
case CSSPropertyBorderRightColor:
case CSSPropertyBorderBottomColor:
case CSSPropertyBorderLeftColor:
case CSSPropertyWebkitBorderStartColor:
case CSSPropertyWebkitBorderEndColor:
case CSSPropertyWebkitBorderBeforeColor:
case CSSPropertyWebkitBorderAfterColor:
case CSSPropertyColor: // <color> | inherit
case CSSPropertyTextLineThroughColor: // CSS3 text decoration colors
case CSSPropertyTextUnderlineColor:
case CSSPropertyTextOverlineColor:
case CSSPropertyWebkitColumnRuleColor:
case CSSPropertyWebkitTextDecorationColor:
case CSSPropertyWebkitTextEmphasisColor:
case CSSPropertyWebkitTextFillColor:
case CSSPropertyWebkitTextStrokeColor:
if (id == CSSValueWebkitText)
validPrimitive = true; // Always allow this, even when strict parsing is on,
// since we use this in our UA sheets.
else if (id == CSSValueCurrentcolor)
validPrimitive = true;
else if ((id >= CSSValueAqua && id <= CSSValueWindowtext) || id == CSSValueMenu ||
(id >= CSSValueWebkitFocusRingColor && id < CSSValueWebkitText && inQuirksMode())) {
validPrimitive = true;
} else {
parsedValue = parseColor();
if (parsedValue)
m_valueList->next();
}
break;
case CSSPropertyCursor: {
// Grammar defined by CSS3 UI and modified by CSS4 images:
// [ [<image> [<x> <y>]?,]*
// [ auto | crosshair | default | pointer | progress | move | e-resize | ne-resize |
// nw-resize | n-resize | se-resize | sw-resize | s-resize | w-resize | ew-resize |
// ns-resize | nesw-resize | nwse-resize | col-resize | row-resize | text | wait | help |
// vertical-text | cell | context-menu | alias | copy | no-drop | not-allowed |
// zoom-in | zoom-out | all-scroll | -webkit-grab | -webkit-grabbing | -webkit-zoom-in |
// -webkit-zoom-out ] ] | inherit
RefPtr<CSSValueList> list;
while (value) {
RefPtr<CSSValue> image = 0;
if (value->unit == CSSPrimitiveValue::CSS_URI) {
String uri = value->string;
if (!uri.isNull())
image = CSSImageValue::create(completeURL(uri));
#if ENABLE(CSS_IMAGE_SET) && ENABLE(MOUSE_CURSOR_SCALE)
} else if (value->unit == CSSParserValue::Function && equalIgnoringCase(value->function->name, "-webkit-image-set(")) {
image = parseImageSet();
if (!image)
break;
#endif
} else
break;
Vector<int> coords;
value = m_valueList->next();
while (value && value->unit == CSSPrimitiveValue::CSS_NUMBER) {
coords.append(int(value->fValue));
value = m_valueList->next();
}
bool hasHotSpot = false;
IntPoint hotSpot(-1, -1);
int nrcoords = coords.size();
if (nrcoords > 0 && nrcoords != 2)
return false;
if (nrcoords == 2) {
hasHotSpot = true;
hotSpot = IntPoint(coords[0], coords[1]);
}
if (!list)
list = CSSValueList::createCommaSeparated();
if (image)
list->append(CSSCursorImageValue::create(image.releaseNonNull(), hasHotSpot, hotSpot));
if ((inStrictMode() && !value) || (value && !(value->unit == CSSParserValue::Operator && value->iValue == ',')))
return false;
value = m_valueList->next(); // comma
}
if (list) {
if (!value) { // no value after url list (MSIE 5 compatibility)
if (list->length() != 1)
return false;
} else if (inQuirksMode() && value->id == CSSValueHand) // MSIE 5 compatibility :/
list->append(cssValuePool().createIdentifierValue(CSSValuePointer));
else if ((value->id >= CSSValueAuto && value->id <= CSSValueWebkitZoomOut) || value->id == CSSValueCopy || value->id == CSSValueNone)
list->append(cssValuePool().createIdentifierValue(value->id));
m_valueList->next();
parsedValue = list.release();
break;
} else if (value) {
id = value->id;
if (inQuirksMode() && value->id == CSSValueHand) { // MSIE 5 compatibility :/
id = CSSValuePointer;
validPrimitive = true;
} else if ((value->id >= CSSValueAuto && value->id <= CSSValueWebkitZoomOut) || value->id == CSSValueCopy || value->id == CSSValueNone)
validPrimitive = true;
} else {
ASSERT_NOT_REACHED();
return false;
}
break;
}
#if ENABLE(CURSOR_VISIBILITY)
case CSSPropertyWebkitCursorVisibility:
if (id == CSSValueAuto || id == CSSValueAutoHide)
validPrimitive = true;
break;
#endif
case CSSPropertyBackgroundAttachment:
case CSSPropertyBackgroundBlendMode:
case CSSPropertyBackgroundClip:
case CSSPropertyWebkitBackgroundClip:
case CSSPropertyWebkitBackgroundComposite:
case CSSPropertyBackgroundImage:
case CSSPropertyBackgroundOrigin:
case CSSPropertyWebkitBackgroundOrigin:
case CSSPropertyBackgroundPosition:
case CSSPropertyBackgroundPositionX:
case CSSPropertyBackgroundPositionY:
case CSSPropertyBackgroundSize:
case CSSPropertyWebkitBackgroundSize:
case CSSPropertyBackgroundRepeat:
case CSSPropertyBackgroundRepeatX:
case CSSPropertyBackgroundRepeatY:
case CSSPropertyWebkitMaskClip:
case CSSPropertyWebkitMaskComposite:
case CSSPropertyWebkitMaskImage:
case CSSPropertyWebkitMaskOrigin:
case CSSPropertyWebkitMaskPosition:
case CSSPropertyWebkitMaskPositionX:
case CSSPropertyWebkitMaskPositionY:
case CSSPropertyWebkitMaskSize:
case CSSPropertyWebkitMaskSourceType:
case CSSPropertyWebkitMaskRepeat:
case CSSPropertyWebkitMaskRepeatX:
case CSSPropertyWebkitMaskRepeatY:
{
RefPtr<CSSValue> val1;
RefPtr<CSSValue> val2;
CSSPropertyID propId1, propId2;
bool result = false;
if (parseFillProperty(propId, propId1, propId2, val1, val2)) {
std::unique_ptr<ShorthandScope> shorthandScope;
if (propId == CSSPropertyBackgroundPosition ||
propId == CSSPropertyBackgroundRepeat ||
propId == CSSPropertyWebkitMaskPosition ||
propId == CSSPropertyWebkitMaskRepeat) {
shorthandScope = std::make_unique<ShorthandScope>(this, propId);
}
addProperty(propId1, val1.release(), important);
if (val2)
addProperty(propId2, val2.release(), important);
result = true;
}
m_implicitShorthand = false;
return result;
}
case CSSPropertyListStyleImage: // <uri> | none | inherit
case CSSPropertyBorderImageSource:
case CSSPropertyWebkitMaskBoxImageSource:
if (id == CSSValueNone) {
parsedValue = cssValuePool().createIdentifierValue(CSSValueNone);
m_valueList->next();
} else if (value->unit == CSSPrimitiveValue::CSS_URI) {
parsedValue = CSSImageValue::create(completeURL(value->string));
m_valueList->next();
} else if (isGeneratedImageValue(value)) {
if (parseGeneratedImage(m_valueList.get(), parsedValue))
m_valueList->next();
else
return false;
}
#if ENABLE(CSS_IMAGE_SET)
else if (value->unit == CSSParserValue::Function && equalIgnoringCase(value->function->name, "-webkit-image-set(")) {
parsedValue = parseImageSet();
if (!parsedValue)
return false;
m_valueList->next();
}
#endif
break;
case CSSPropertyWebkitTextStrokeWidth:
case CSSPropertyOutlineWidth: // <border-width> | inherit
case CSSPropertyBorderTopWidth: //// <border-width> | inherit
case CSSPropertyBorderRightWidth: // Which is defined as
case CSSPropertyBorderBottomWidth: // thin | medium | thick | <length>
case CSSPropertyBorderLeftWidth:
case CSSPropertyWebkitBorderStartWidth:
case CSSPropertyWebkitBorderEndWidth:
case CSSPropertyWebkitBorderBeforeWidth:
case CSSPropertyWebkitBorderAfterWidth:
case CSSPropertyWebkitColumnRuleWidth:
if (id == CSSValueThin || id == CSSValueMedium || id == CSSValueThick)
validPrimitive = true;
else
validPrimitive = validUnit(value, FLength | FNonNeg);
break;
case CSSPropertyLetterSpacing: // normal | <length> | inherit
if (id == CSSValueNormal)
validPrimitive = true;
else
validPrimitive = validUnit(value, FLength);
break;
case CSSPropertyWordSpacing: // normal | <length> | <percentage> | inherit
if (id == CSSValueNormal)
validPrimitive = true;
else
validPrimitive = validUnit(value, FLength | FPercent);
break;
case CSSPropertyTextIndent:
parsedValue = parseTextIndent();
break;
case CSSPropertyPaddingTop: //// <padding-width> | inherit
case CSSPropertyPaddingRight: // Which is defined as
case CSSPropertyPaddingBottom: // <length> | <percentage>
case CSSPropertyPaddingLeft: ////
case CSSPropertyWebkitPaddingStart:
case CSSPropertyWebkitPaddingEnd:
case CSSPropertyWebkitPaddingBefore:
case CSSPropertyWebkitPaddingAfter:
validPrimitive = (!id && validUnit(value, FLength | FPercent | FNonNeg));
break;
case CSSPropertyMaxWidth:
case CSSPropertyWebkitMaxLogicalWidth:
validPrimitive = (id == CSSValueNone || validWidth(value));
break;
case CSSPropertyMinWidth:
case CSSPropertyWebkitMinLogicalWidth:
validPrimitive = validWidth(value);
break;
case CSSPropertyWidth:
case CSSPropertyWebkitLogicalWidth:
validPrimitive = (id == CSSValueAuto || validWidth(value));
break;
case CSSPropertyMaxHeight:
case CSSPropertyWebkitMaxLogicalHeight:
validPrimitive = (id == CSSValueNone || validHeight(value));
break;
case CSSPropertyMinHeight:
case CSSPropertyWebkitMinLogicalHeight:
validPrimitive = validHeight(value);
break;
case CSSPropertyHeight:
case CSSPropertyWebkitLogicalHeight:
validPrimitive = (id == CSSValueAuto || validHeight(value));
break;
case CSSPropertyFontSize:
return parseFontSize(important);
case CSSPropertyFontVariant: // normal | small-caps | inherit
return parseFontVariant(important);
case CSSPropertyVerticalAlign:
// baseline | sub | super | top | text-top | middle | bottom | text-bottom |
// <percentage> | <length> | inherit
if (id >= CSSValueBaseline && id <= CSSValueWebkitBaselineMiddle)
validPrimitive = true;
else
validPrimitive = (!id && validUnit(value, FLength | FPercent));
break;
case CSSPropertyBottom: // <length> | <percentage> | auto | inherit
case CSSPropertyLeft: // <length> | <percentage> | auto | inherit
case CSSPropertyRight: // <length> | <percentage> | auto | inherit
case CSSPropertyTop: // <length> | <percentage> | auto | inherit
case CSSPropertyMarginTop: //// <margin-width> | inherit
case CSSPropertyMarginRight: // Which is defined as
case CSSPropertyMarginBottom: // <length> | <percentage> | auto | inherit
case CSSPropertyMarginLeft: ////
case CSSPropertyWebkitMarginStart:
case CSSPropertyWebkitMarginEnd:
case CSSPropertyWebkitMarginBefore:
case CSSPropertyWebkitMarginAfter:
if (id == CSSValueAuto)
validPrimitive = true;
else
validPrimitive = (!id && validUnit(value, FLength | FPercent));
break;
case CSSPropertyZIndex: // auto | <integer> | inherit
if (id == CSSValueAuto)
validPrimitive = true;
else
validPrimitive = (!id && validUnit(value, FInteger, CSSQuirksMode));
break;
case CSSPropertyOrphans: // <integer> | inherit | auto (We've added support for auto for backwards compatibility)
case CSSPropertyWidows: // <integer> | inherit | auto (Ditto)
if (id == CSSValueAuto)
validPrimitive = true;
else
validPrimitive = (!id && validUnit(value, FPositiveInteger, CSSQuirksMode));
break;
case CSSPropertyLineHeight:
return parseLineHeight(important);
case CSSPropertyCounterIncrement: // [ <identifier> <integer>? ]+ | none | inherit
if (id != CSSValueNone)
return parseCounter(propId, 1, important);
validPrimitive = true;
break;
case CSSPropertyCounterReset: // [ <identifier> <integer>? ]+ | none | inherit
if (id != CSSValueNone)
return parseCounter(propId, 0, important);
validPrimitive = true;
break;
case CSSPropertyFontFamily:
// [[ <family-name> | <generic-family> ],]* [<family-name> | <generic-family>] | inherit
{
parsedValue = parseFontFamily();
break;
}
case CSSPropertyWebkitTextDecoration:
// [ <text-decoration-line> || <text-decoration-style> || <text-decoration-color> ] | inherit
return parseShorthand(CSSPropertyWebkitTextDecoration, webkitTextDecorationShorthand(), important);
case CSSPropertyTextDecoration:
case CSSPropertyWebkitTextDecorationsInEffect:
case CSSPropertyWebkitTextDecorationLine:
// none | [ underline || overline || line-through || blink ] | inherit
return parseTextDecoration(propId, important);
case CSSPropertyWebkitTextDecorationStyle:
// solid | double | dotted | dashed | wavy
if (id == CSSValueSolid || id == CSSValueDouble || id == CSSValueDotted || id == CSSValueDashed || id == CSSValueWavy)
validPrimitive = true;
break;
case CSSPropertyWebkitTextDecorationSkip:
// none | [ objects || spaces || ink || edges || box-decoration ]
return parseTextDecorationSkip(important);
case CSSPropertyWebkitTextUnderlinePosition:
// auto | alphabetic | under
return parseTextUnderlinePosition(important);
case CSSPropertyZoom: // normal | reset | document | <number> | <percentage> | inherit
if (id == CSSValueNormal || id == CSSValueReset || id == CSSValueDocument)
validPrimitive = true;
else
validPrimitive = (!id && validUnit(value, FNumber | FPercent | FNonNeg, CSSStrictMode));
break;
case CSSPropertySrc: // Only used within @font-face and @-webkit-filter, so cannot use inherit | initial or be !important. This is a list of urls or local references.
return parseFontFaceSrc();
case CSSPropertyUnicodeRange:
return parseFontFaceUnicodeRange();
/* CSS3 properties */
case CSSPropertyBorderImage: {
RefPtr<CSSValue> result;
return parseBorderImage(propId, result, important);
}
case CSSPropertyWebkitBorderImage:
case CSSPropertyWebkitMaskBoxImage: {
RefPtr<CSSValue> result;
if (parseBorderImage(propId, result)) {
addProperty(propId, result, important);
return true;
}
break;
}
case CSSPropertyBorderImageOutset:
case CSSPropertyWebkitMaskBoxImageOutset: {
RefPtr<CSSPrimitiveValue> result;
if (parseBorderImageOutset(result)) {
addProperty(propId, result, important);
return true;
}
break;
}
case CSSPropertyBorderImageRepeat:
case CSSPropertyWebkitMaskBoxImageRepeat: {
RefPtr<CSSValue> result;
if (parseBorderImageRepeat(result)) {
addProperty(propId, result, important);
return true;
}
break;
}
case CSSPropertyBorderImageSlice:
case CSSPropertyWebkitMaskBoxImageSlice: {
RefPtr<CSSBorderImageSliceValue> result;
if (parseBorderImageSlice(propId, result)) {
addProperty(propId, result, important);
return true;
}
break;
}
case CSSPropertyBorderImageWidth:
case CSSPropertyWebkitMaskBoxImageWidth: {
RefPtr<CSSPrimitiveValue> result;
if (parseBorderImageWidth(result)) {
addProperty(propId, result, important);
return true;
}
break;
}
case CSSPropertyBorderTopRightRadius:
case CSSPropertyBorderTopLeftRadius:
case CSSPropertyBorderBottomLeftRadius:
case CSSPropertyBorderBottomRightRadius: {
if (num != 1 && num != 2)
return false;
validPrimitive = validUnit(value, FLength | FPercent | FNonNeg);
if (!validPrimitive)
return false;
RefPtr<CSSPrimitiveValue> parsedValue1 = createPrimitiveNumericValue(value);
RefPtr<CSSPrimitiveValue> parsedValue2;
if (num == 2) {
value = m_valueList->next();
validPrimitive = validUnit(value, FLength | FPercent | FNonNeg);
if (!validPrimitive)
return false;
parsedValue2 = createPrimitiveNumericValue(value);
} else
parsedValue2 = parsedValue1;
addProperty(propId, createPrimitiveValuePair(parsedValue1.release(), parsedValue2.release()), important);
return true;
}
case CSSPropertyTabSize:
validPrimitive = validUnit(value, FInteger | FNonNeg);
break;
case CSSPropertyWebkitAspectRatio:
return parseAspectRatio(important);
case CSSPropertyBorderRadius:
case CSSPropertyWebkitBorderRadius:
return parseBorderRadius(propId, important);
case CSSPropertyOutlineOffset:
validPrimitive = validUnit(value, FLength);
break;
case CSSPropertyTextShadow: // CSS2 property, dropped in CSS2.1, back in CSS3, so treat as CSS3
case CSSPropertyBoxShadow:
case CSSPropertyWebkitBoxShadow:
if (id == CSSValueNone)
validPrimitive = true;
else {
RefPtr<CSSValueList> shadowValueList = parseShadow(m_valueList.get(), propId);
if (shadowValueList) {
addProperty(propId, shadowValueList.release(), important);
m_valueList->next();
return true;
}
return false;
}
break;
case CSSPropertyWebkitInitialLetter: {
if (id == CSSValueNormal)
validPrimitive = true;
else {
if (num != 1 && num != 2)
return false;
validPrimitive = validUnit(value, FPositiveInteger);
if (!validPrimitive)
return false;
RefPtr<CSSPrimitiveValue> parsedValue1 = createPrimitiveNumericValue(value);
RefPtr<CSSPrimitiveValue> parsedValue2;
if (num == 2) {
value = m_valueList->next();
validPrimitive = validUnit(value, FPositiveInteger);
if (!validPrimitive)
return false;
parsedValue2 = createPrimitiveNumericValue(value);
} else
parsedValue2 = parsedValue1;
addProperty(propId, createPrimitiveValuePair(parsedValue1.release(), parsedValue2.release()), important);
return true;
}
break;
}
case CSSPropertyWebkitBoxReflect:
if (id == CSSValueNone)
validPrimitive = true;
else
return parseReflect(propId, important);
break;
case CSSPropertyOpacity:
validPrimitive = validUnit(value, FNumber);
break;
case CSSPropertyWebkitBoxFlex:
validPrimitive = validUnit(value, FNumber);
break;
case CSSPropertyWebkitBoxFlexGroup:
validPrimitive = validUnit(value, FInteger | FNonNeg, CSSStrictMode);
break;
case CSSPropertyWebkitBoxOrdinalGroup:
validPrimitive = validUnit(value, FInteger | FNonNeg, CSSStrictMode) && value->fValue;
break;
case CSSPropertyWebkitFilter:
if (id == CSSValueNone)
validPrimitive = true;
else {
RefPtr<CSSValue> currValue;
if (!parseFilter(m_valueList.get(), currValue))
return false;
addProperty(propId, currValue, important);
return true;
}
break;
#if ENABLE(CSS_COMPOSITING)
case CSSPropertyMixBlendMode:
if (cssCompositingEnabled())
validPrimitive = true;
break;
case CSSPropertyIsolation:
if (cssCompositingEnabled())
validPrimitive = true;
break;
#endif
case CSSPropertyFlex: {
ShorthandScope scope(this, propId);
if (id == CSSValueNone) {
addProperty(CSSPropertyFlexGrow, cssValuePool().createValue(0, CSSPrimitiveValue::CSS_NUMBER), important);
addProperty(CSSPropertyFlexShrink, cssValuePool().createValue(0, CSSPrimitiveValue::CSS_NUMBER), important);
addProperty(CSSPropertyFlexBasis, cssValuePool().createIdentifierValue(CSSValueAuto), important);
return true;
}
return parseFlex(m_valueList.get(), important);
}
case CSSPropertyFlexBasis:
// FIXME: Support intrinsic dimensions too.
if (id == CSSValueAuto)
validPrimitive = true;
else
validPrimitive = (!id && validUnit(value, FLength | FPercent | FNonNeg));
break;
case CSSPropertyFlexGrow:
case CSSPropertyFlexShrink:
validPrimitive = validUnit(value, FNumber | FNonNeg);
break;
case CSSPropertyOrder:
if (validUnit(value, FInteger, CSSStrictMode)) {
// We restrict the smallest value to int min + 2 because we use int min and int min + 1 as special values in a hash set.
parsedValue = cssValuePool().createValue(std::max<double>(std::numeric_limits<int>::min() + 2, value->fValue), static_cast<CSSPrimitiveValue::UnitTypes>(value->unit));
m_valueList->next();
}
break;
case CSSPropertyWebkitMarquee:
return parseShorthand(propId, webkitMarqueeShorthand(), important);
case CSSPropertyWebkitMarqueeIncrement:
if (id == CSSValueSmall || id == CSSValueLarge || id == CSSValueMedium)
validPrimitive = true;
else
validPrimitive = validUnit(value, FLength | FPercent);
break;
case CSSPropertyWebkitMarqueeRepetition:
if (id == CSSValueInfinite)
validPrimitive = true;
else
validPrimitive = validUnit(value, FInteger | FNonNeg);
break;
case CSSPropertyWebkitMarqueeSpeed:
if (id == CSSValueNormal || id == CSSValueSlow || id == CSSValueFast)
validPrimitive = true;
else
validPrimitive = validUnit(value, FTime | FInteger | FNonNeg);
break;
#if ENABLE(CSS_REGIONS)
case CSSPropertyWebkitFlowInto:
if (!cssRegionsEnabled())
return false;
return parseFlowThread(propId, important);
case CSSPropertyWebkitFlowFrom:
if (!cssRegionsEnabled())
return false;
return parseRegionThread(propId, important);
#endif
case CSSPropertyWebkitTransform:
if (id == CSSValueNone)
validPrimitive = true;
else {
RefPtr<CSSValue> transformValue = parseTransform();
if (transformValue) {
addProperty(propId, transformValue.release(), important);
return true;
}
return false;
}
break;
case CSSPropertyWebkitTransformOrigin:
case CSSPropertyWebkitTransformOriginX:
case CSSPropertyWebkitTransformOriginY:
case CSSPropertyWebkitTransformOriginZ: {
RefPtr<CSSValue> val1;
RefPtr<CSSValue> val2;
RefPtr<CSSValue> val3;
CSSPropertyID propId1, propId2, propId3;
if (parseTransformOrigin(propId, propId1, propId2, propId3, val1, val2, val3)) {
addProperty(propId1, val1.release(), important);
if (val2)
addProperty(propId2, val2.release(), important);
if (val3)
addProperty(propId3, val3.release(), important);
return true;
}
return false;
}
case CSSPropertyWebkitPerspective:
if (id == CSSValueNone)
validPrimitive = true;
else {
// Accepting valueless numbers is a quirk of the -webkit prefixed version of the property.
if (validUnit(value, FNumber | FLength | FNonNeg)) {
RefPtr<CSSValue> val = createPrimitiveNumericValue(value);
if (val) {
addProperty(propId, val.release(), important);
return true;
}
return false;
}
}
break;
case CSSPropertyWebkitPerspectiveOrigin:
case CSSPropertyWebkitPerspectiveOriginX:
case CSSPropertyWebkitPerspectiveOriginY: {
RefPtr<CSSValue> val1;
RefPtr<CSSValue> val2;
CSSPropertyID propId1, propId2;
if (parsePerspectiveOrigin(propId, propId1, propId2, val1, val2)) {
addProperty(propId1, val1.release(), important);
if (val2)
addProperty(propId2, val2.release(), important);
return true;
}
return false;
}
case CSSPropertyWebkitAnimationDelay:
case CSSPropertyWebkitAnimationDirection:
case CSSPropertyWebkitAnimationDuration:
case CSSPropertyWebkitAnimationFillMode:
case CSSPropertyWebkitAnimationName:
case CSSPropertyWebkitAnimationPlayState:
case CSSPropertyWebkitAnimationIterationCount:
case CSSPropertyWebkitAnimationTimingFunction:
case CSSPropertyTransitionDelay:
case CSSPropertyTransitionDuration:
case CSSPropertyTransitionTimingFunction:
case CSSPropertyTransitionProperty:
case CSSPropertyWebkitTransitionDelay:
case CSSPropertyWebkitTransitionDuration:
case CSSPropertyWebkitTransitionTimingFunction:
case CSSPropertyWebkitTransitionProperty: {
RefPtr<CSSValue> val;
AnimationParseContext context;
if (parseAnimationProperty(propId, val, context)) {
addPropertyWithPrefixingVariant(propId, val.release(), important);
return true;
}
return false;
}
case CSSPropertyWebkitJustifySelf:
return parseJustifySelf(propId, important);
#if ENABLE(CSS_GRID_LAYOUT)
case CSSPropertyWebkitGridAutoColumns:
case CSSPropertyWebkitGridAutoRows:
parsedValue = parseGridTrackSize(*m_valueList);
break;
case CSSPropertyWebkitGridTemplateColumns:
case CSSPropertyWebkitGridTemplateRows:
parsedValue = parseGridTrackList();
break;
case CSSPropertyWebkitGridColumnStart:
case CSSPropertyWebkitGridColumnEnd:
case CSSPropertyWebkitGridRowStart:
case CSSPropertyWebkitGridRowEnd:
parsedValue = parseGridPosition();
break;
case CSSPropertyWebkitGridColumn:
case CSSPropertyWebkitGridRow: {
return parseGridItemPositionShorthand(propId, important);
}
case CSSPropertyWebkitGridTemplate:
return parseGridTemplateShorthand(important);
case CSSPropertyWebkitGrid:
return parseGridShorthand(important);
case CSSPropertyWebkitGridArea:
return parseGridAreaShorthand(important);
case CSSPropertyWebkitGridTemplateAreas:
parsedValue = parseGridTemplateAreas();
break;
case CSSPropertyWebkitGridAutoFlow:
parsedValue = parseGridAutoFlow(*m_valueList);
break;
#endif /* ENABLE(CSS_GRID_LAYOUT) */
case CSSPropertyWebkitMarginCollapse: {
if (num == 1) {
ShorthandScope scope(this, CSSPropertyWebkitMarginCollapse);
if (!parseValue(webkitMarginCollapseShorthand().properties()[0], important))
return false;
CSSValue* value = m_parsedProperties.last().value();
addProperty(webkitMarginCollapseShorthand().properties()[1], value, important);
return true;
}
else if (num == 2) {
ShorthandScope scope(this, CSSPropertyWebkitMarginCollapse);
if (!parseValue(webkitMarginCollapseShorthand().properties()[0], important) || !parseValue(webkitMarginCollapseShorthand().properties()[1], important))
return false;
return true;
}
return false;
}
case CSSPropertyTextLineThroughWidth:
case CSSPropertyTextOverlineWidth:
case CSSPropertyTextUnderlineWidth:
if (id == CSSValueAuto || id == CSSValueNormal || id == CSSValueThin ||
id == CSSValueMedium || id == CSSValueThick)
validPrimitive = true;
else
validPrimitive = !id && validUnit(value, FNumber | FLength | FPercent);
break;
case CSSPropertyWebkitColumnCount:
if (id == CSSValueAuto)
validPrimitive = true;
else
validPrimitive = !id && validUnit(value, FPositiveInteger, CSSQuirksMode);
break;
case CSSPropertyWebkitColumnGap: // normal | <length>
if (id == CSSValueNormal)
validPrimitive = true;
else
validPrimitive = validUnit(value, FLength | FNonNeg);
break;
case CSSPropertyWebkitColumnAxis:
if (id == CSSValueHorizontal || id == CSSValueVertical || id == CSSValueAuto)
validPrimitive = true;
break;
case CSSPropertyWebkitColumnProgression:
if (id == CSSValueNormal || id == CSSValueReverse)
validPrimitive = true;
break;
case CSSPropertyWebkitColumnSpan: // none | all | 1 (will be dropped in the unprefixed property)
if (id == CSSValueAll || id == CSSValueNone)
validPrimitive = true;
else
validPrimitive = validUnit(value, FNumber | FNonNeg) && value->fValue == 1;
break;
case CSSPropertyWebkitColumnWidth: // auto | <length>
if (id == CSSValueAuto)
validPrimitive = true;
else // Always parse this property in strict mode, since it would be ambiguous otherwise when used in the 'columns' shorthand property.
validPrimitive = validUnit(value, FLength | FNonNeg, CSSStrictMode) && value->fValue;
break;
// End of CSS3 properties
// Apple specific properties. These will never be standardized and are purely to
// support custom WebKit-based Apple applications.
case CSSPropertyWebkitLineClamp:
// When specifying number of lines, don't allow 0 as a valid value
// When specifying either type of unit, require non-negative integers
validPrimitive = (!id && (value->unit == CSSPrimitiveValue::CSS_PERCENTAGE || value->fValue) && validUnit(value, FInteger | FPercent | FNonNeg, CSSQuirksMode));
break;
#if ENABLE(IOS_TEXT_AUTOSIZING)
case CSSPropertyWebkitTextSizeAdjust:
if (id == CSSValueAuto || id == CSSValueNone)
validPrimitive = true;
else {
// FIXME: Handle multilength case where we allow relative units.
validPrimitive = (!id && validUnit(value, FPercent | FNonNeg, CSSStrictMode));
}
break;
#endif
case CSSPropertyWebkitFontSizeDelta: // <length>
validPrimitive = validUnit(value, FLength);
break;
case CSSPropertyWebkitHyphenateCharacter:
if (id == CSSValueAuto || value->unit == CSSPrimitiveValue::CSS_STRING)
validPrimitive = true;
break;
case CSSPropertyWebkitHyphenateLimitBefore:
case CSSPropertyWebkitHyphenateLimitAfter:
if (id == CSSValueAuto || validUnit(value, FInteger | FNonNeg, CSSStrictMode))
validPrimitive = true;
break;
case CSSPropertyWebkitHyphenateLimitLines:
if (id == CSSValueNoLimit || validUnit(value, FInteger | FNonNeg, CSSStrictMode))
validPrimitive = true;
break;
case CSSPropertyWebkitLineGrid:
if (id == CSSValueNone)
validPrimitive = true;
else if (value->unit == CSSPrimitiveValue::CSS_IDENT) {
String lineGridValue = String(value->string);
if (!lineGridValue.isEmpty()) {
addProperty(propId, cssValuePool().createValue(lineGridValue, CSSPrimitiveValue::CSS_STRING), important);
return true;
}
}
break;
case CSSPropertyWebkitLocale:
if (id == CSSValueAuto || value->unit == CSSPrimitiveValue::CSS_STRING)
validPrimitive = true;
break;
#if ENABLE(DASHBOARD_SUPPORT)
case CSSPropertyWebkitDashboardRegion: // <dashboard-region> | <dashboard-region>
if (value->unit == CSSParserValue::Function || id == CSSValueNone)
return parseDashboardRegions(propId, important);
break;
#endif
#if PLATFORM(IOS)
case CSSPropertyWebkitTouchCallout:
if (id == CSSValueDefault || id == CSSValueNone)
validPrimitive = true;
break;
#endif
#if ENABLE(TOUCH_EVENTS)
case CSSPropertyWebkitTapHighlightColor:
if ((id >= CSSValueAqua && id <= CSSValueWindowtext) || id == CSSValueMenu
|| (id >= CSSValueWebkitFocusRingColor && id < CSSValueWebkitText && inQuirksMode())) {
validPrimitive = true;
} else {
parsedValue = parseColor();
if (parsedValue)
m_valueList->next();
}
break;
#endif
// End Apple-specific properties
/* shorthand properties */
case CSSPropertyBackground: {
// Position must come before color in this array because a plain old "0" is a legal color
// in quirks mode but it's usually the X coordinate of a position.
const CSSPropertyID properties[] = { CSSPropertyBackgroundImage, CSSPropertyBackgroundRepeat,
CSSPropertyBackgroundAttachment, CSSPropertyBackgroundPosition, CSSPropertyBackgroundOrigin,
CSSPropertyBackgroundClip, CSSPropertyBackgroundColor, CSSPropertyBackgroundSize };
return parseFillShorthand(propId, properties, WTF_ARRAY_LENGTH(properties), important);
}
case CSSPropertyWebkitMask: {
const CSSPropertyID properties[] = { CSSPropertyWebkitMaskImage, CSSPropertyWebkitMaskSourceType, CSSPropertyWebkitMaskRepeat,
CSSPropertyWebkitMaskPosition, CSSPropertyWebkitMaskOrigin, CSSPropertyWebkitMaskClip, CSSPropertyWebkitMaskSize };
return parseFillShorthand(propId, properties, WTF_ARRAY_LENGTH(properties), important);
}
case CSSPropertyBorder:
// [ 'border-width' || 'border-style' || <color> ] | inherit
{
if (parseShorthand(propId, borderAbridgedShorthand(), important)) {
// The CSS3 Borders and Backgrounds specification says that border also resets border-image. It's as
// though a value of none was specified for the image.
addExpandedPropertyForValue(CSSPropertyBorderImage, cssValuePool().createImplicitInitialValue(), important);
return true;
}
return false;
}
case CSSPropertyBorderTop:
// [ 'border-top-width' || 'border-style' || <color> ] | inherit
return parseShorthand(propId, borderTopShorthand(), important);
case CSSPropertyBorderRight:
// [ 'border-right-width' || 'border-style' || <color> ] | inherit
return parseShorthand(propId, borderRightShorthand(), important);
case CSSPropertyBorderBottom:
// [ 'border-bottom-width' || 'border-style' || <color> ] | inherit
return parseShorthand(propId, borderBottomShorthand(), important);
case CSSPropertyBorderLeft:
// [ 'border-left-width' || 'border-style' || <color> ] | inherit
return parseShorthand(propId, borderLeftShorthand(), important);
case CSSPropertyWebkitBorderStart:
return parseShorthand(propId, webkitBorderStartShorthand(), important);
case CSSPropertyWebkitBorderEnd:
return parseShorthand(propId, webkitBorderEndShorthand(), important);
case CSSPropertyWebkitBorderBefore:
return parseShorthand(propId, webkitBorderBeforeShorthand(), important);
case CSSPropertyWebkitBorderAfter:
return parseShorthand(propId, webkitBorderAfterShorthand(), important);
case CSSPropertyOutline:
// [ 'outline-color' || 'outline-style' || 'outline-width' ] | inherit
return parseShorthand(propId, outlineShorthand(), important);
case CSSPropertyBorderColor:
// <color>{1,4} | inherit
return parse4Values(propId, borderColorShorthand().properties(), important);
case CSSPropertyBorderWidth:
// <border-width>{1,4} | inherit
return parse4Values(propId, borderWidthShorthand().properties(), important);
case CSSPropertyBorderStyle:
// <border-style>{1,4} | inherit
return parse4Values(propId, borderStyleShorthand().properties(), important);
case CSSPropertyMargin:
// <margin-width>{1,4} | inherit
return parse4Values(propId, marginShorthand().properties(), important);
case CSSPropertyPadding:
// <padding-width>{1,4} | inherit
return parse4Values(propId, paddingShorthand().properties(), important);
case CSSPropertyFlexFlow:
return parseShorthand(propId, flexFlowShorthand(), important);
case CSSPropertyFont:
// [ [ 'font-style' || 'font-variant' || 'font-weight' ]? 'font-size' [ / 'line-height' ]?
// 'font-family' ] | caption | icon | menu | message-box | small-caption | status-bar | inherit
if (id >= CSSValueCaption && id <= CSSValueStatusBar)
validPrimitive = true;
else
return parseFont(important);
break;
case CSSPropertyListStyle:
return parseShorthand(propId, listStyleShorthand(), important);
case CSSPropertyWebkitColumns:
return parseShorthand(propId, webkitColumnsShorthand(), important);
case CSSPropertyWebkitColumnRule:
return parseShorthand(propId, webkitColumnRuleShorthand(), important);
case CSSPropertyWebkitTextStroke:
return parseShorthand(propId, webkitTextStrokeShorthand(), important);
case CSSPropertyWebkitAnimation:
return parseAnimationShorthand(important);
case CSSPropertyTransition:
case CSSPropertyWebkitTransition:
return parseTransitionShorthand(propId, important);
case CSSPropertyInvalid:
return false;
case CSSPropertyPage:
return parsePage(propId, important);
case CSSPropertyFontStretch:
case CSSPropertyTextLineThrough:
case CSSPropertyTextOverline:
case CSSPropertyTextUnderline:
return false;
// CSS Text Layout Module Level 3: Vertical writing support
case CSSPropertyWebkitTextEmphasis:
return parseShorthand(propId, webkitTextEmphasisShorthand(), important);
case CSSPropertyWebkitTextEmphasisStyle:
return parseTextEmphasisStyle(important);
case CSSPropertyWebkitTextEmphasisPosition:
return parseTextEmphasisPosition(important);
case CSSPropertyWebkitTextOrientation:
// FIXME: For now just support sideways, sideways-right, upright and vertical-right.
if (id == CSSValueSideways || id == CSSValueSidewaysRight || id == CSSValueVerticalRight || id == CSSValueUpright)
validPrimitive = true;
break;
case CSSPropertyWebkitLineBoxContain:
if (id == CSSValueNone)
validPrimitive = true;
else
return parseLineBoxContain(important);
break;
case CSSPropertyWebkitFontFeatureSettings:
if (id == CSSValueNormal)
validPrimitive = true;
else
return parseFontFeatureSettings(important);
break;
case CSSPropertyWebkitFontVariantLigatures:
if (id == CSSValueNormal)
validPrimitive = true;
else
return parseFontVariantLigatures(important);
break;
case CSSPropertyWebkitClipPath:
parsedValue = parseClipPath();
break;
#if ENABLE(CSS_SHAPES)
case CSSPropertyWebkitShapeOutside:
parsedValue = parseShapeProperty(propId);
break;
case CSSPropertyWebkitShapeMargin:
validPrimitive = (RuntimeEnabledFeatures::sharedFeatures().cssShapesEnabled() && !id && validUnit(value, FLength | FPercent | FNonNeg));
break;
case CSSPropertyWebkitShapeImageThreshold:
validPrimitive = (RuntimeEnabledFeatures::sharedFeatures().cssShapesEnabled() && !id && validUnit(value, FNumber));
break;
#endif
#if ENABLE(CSS_IMAGE_ORIENTATION)
case CSSPropertyImageOrientation:
validPrimitive = !id && validUnit(value, FAngle);
break;
#endif
#if ENABLE(CSS_IMAGE_RESOLUTION)
case CSSPropertyImageResolution:
parsedValue = parseImageResolution();
break;
#endif
case CSSPropertyBorderBottomStyle:
case CSSPropertyBorderCollapse:
case CSSPropertyBorderLeftStyle:
case CSSPropertyBorderRightStyle:
case CSSPropertyBorderTopStyle:
case CSSPropertyBoxSizing:
case CSSPropertyCaptionSide:
case CSSPropertyClear:
case CSSPropertyDirection:
case CSSPropertyDisplay:
case CSSPropertyEmptyCells:
case CSSPropertyFloat:
case CSSPropertyFontStyle:
case CSSPropertyImageRendering:
case CSSPropertyListStylePosition:
case CSSPropertyListStyleType:
case CSSPropertyObjectFit:
case CSSPropertyOutlineStyle:
case CSSPropertyOverflowWrap:
case CSSPropertyOverflowX:
case CSSPropertyOverflowY:
case CSSPropertyPageBreakAfter:
case CSSPropertyPageBreakBefore:
case CSSPropertyPageBreakInside:
case CSSPropertyPointerEvents:
case CSSPropertyPosition:
case CSSPropertyResize:
case CSSPropertySpeak:
case CSSPropertyTableLayout:
case CSSPropertyTextLineThroughMode:
case CSSPropertyTextLineThroughStyle:
case CSSPropertyTextOverflow:
case CSSPropertyTextOverlineMode:
case CSSPropertyTextOverlineStyle:
case CSSPropertyTextRendering:
case CSSPropertyTextTransform:
case CSSPropertyTextUnderlineMode:
case CSSPropertyTextUnderlineStyle:
case CSSPropertyVisibility:
case CSSPropertyWebkitAppearance:
case CSSPropertyWebkitBackfaceVisibility:
case CSSPropertyWebkitBorderAfterStyle:
case CSSPropertyWebkitBorderBeforeStyle:
case CSSPropertyWebkitBorderEndStyle:
case CSSPropertyWebkitBorderFit:
case CSSPropertyWebkitBorderStartStyle:
case CSSPropertyWebkitBoxAlign:
#if ENABLE(CSS_BOX_DECORATION_BREAK)
case CSSPropertyWebkitBoxDecorationBreak:
#endif
case CSSPropertyWebkitBoxDirection:
case CSSPropertyWebkitBoxLines:
case CSSPropertyWebkitBoxOrient:
case CSSPropertyWebkitBoxPack:
case CSSPropertyWebkitColorCorrection:
case CSSPropertyWebkitColumnBreakAfter:
case CSSPropertyWebkitColumnBreakBefore:
case CSSPropertyWebkitColumnBreakInside:
case CSSPropertyWebkitColumnFill:
case CSSPropertyWebkitColumnRuleStyle:
case CSSPropertyAlignContent:
case CSSPropertyAlignItems:
case CSSPropertyAlignSelf:
case CSSPropertyFlexDirection:
case CSSPropertyFlexWrap:
case CSSPropertyJustifyContent:
case CSSPropertyWebkitFontKerning:
case CSSPropertyWebkitFontSmoothing:
case CSSPropertyWebkitHyphens:
case CSSPropertyWebkitLineAlign:
case CSSPropertyWebkitLineBreak:
case CSSPropertyWebkitLineSnap:
case CSSPropertyWebkitMarginAfterCollapse:
case CSSPropertyWebkitMarginBeforeCollapse:
case CSSPropertyWebkitMarginBottomCollapse:
case CSSPropertyWebkitMarginTopCollapse:
case CSSPropertyWebkitMarqueeDirection:
case CSSPropertyWebkitMarqueeStyle:
case CSSPropertyWebkitNbspMode:
#if ENABLE(ACCELERATED_OVERFLOW_SCROLLING)
case CSSPropertyWebkitOverflowScrolling:
#endif
case CSSPropertyWebkitPrintColorAdjust:
#if ENABLE(CSS_REGIONS)
case CSSPropertyWebkitRegionBreakAfter:
case CSSPropertyWebkitRegionBreakBefore:
case CSSPropertyWebkitRegionBreakInside:
case CSSPropertyWebkitRegionFragment:
#endif
case CSSPropertyWebkitRtlOrdering:
case CSSPropertyWebkitRubyPosition:
#if ENABLE(CSS3_TEXT)
case CSSPropertyWebkitTextAlignLast:
#endif // CSS3_TEXT
case CSSPropertyWebkitTextCombine:
#if ENABLE(CSS3_TEXT)
case CSSPropertyWebkitTextJustify:
#endif // CSS3_TEXT
case CSSPropertyWebkitTextSecurity:
case CSSPropertyWebkitTransformStyle:
case CSSPropertyWebkitUserDrag:
case CSSPropertyWebkitUserModify:
case CSSPropertyWebkitUserSelect:
case CSSPropertyWebkitWritingMode:
case CSSPropertyWhiteSpace:
case CSSPropertyWordBreak:
case CSSPropertyWordWrap:
#if ENABLE(CSS_SCROLL_SNAP)
case CSSPropertyWebkitScrollSnapType:
#endif
// These properties should be handled before in isValidKeywordPropertyAndValue().
ASSERT_NOT_REACHED();
return false;
#if ENABLE(CSS_DEVICE_ADAPTATION)
// Properties bellow are validated inside parseViewportProperty, because we
// check for parser state inViewportScope. We need to invalidate if someone
// adds them outside a @viewport rule.
case CSSPropertyMaxZoom:
case CSSPropertyMinZoom:
case CSSPropertyOrientation:
case CSSPropertyUserZoom:
validPrimitive = false;
break;
#endif
#if ENABLE(CSS_SCROLL_SNAP)
case CSSPropertyWebkitScrollSnapPointsX:
case CSSPropertyWebkitScrollSnapPointsY:
if (id == CSSValueElements) {
validPrimitive = true;
break;
}
return parseNonElementSnapPoints(propId, important);
case CSSPropertyWebkitScrollSnapDestination: // <length>{2}
return parseScrollSnapDestination(propId, important);
case CSSPropertyWebkitScrollSnapCoordinate:
return parseScrollSnapCoordinate(propId, important);
#endif
default:
return parseSVGValue(propId, important);
}
if (validPrimitive) {
parsedValue = parseValidPrimitive(id, value);
m_valueList->next();
}
ASSERT(!m_parsedCalculation);
if (parsedValue) {
if (!m_valueList->current() || inShorthand()) {
addProperty(propId, parsedValue.release(), important);
return true;
}
}
return false;
}
void CSSParser::addFillValue(RefPtr<CSSValue>& lval, PassRef<CSSValue> rval)
{
if (!lval) {
lval = WTF::move(rval);
return;
}
if (lval->isBaseValueList()) {
downcast<CSSValueList>(*lval).append(WTF::move(rval));
return;
}
auto list = CSSValueList::createCommaSeparated();
list.get().append(lval.releaseNonNull());
list.get().append(WTF::move(rval));
lval = WTF::move(list);
}
static bool isItemPositionKeyword(CSSValueID id)
{
return id == CSSValueStart || id == CSSValueEnd || id == CSSValueCenter
|| id == CSSValueSelfStart || id == CSSValueSelfEnd || id == CSSValueFlexStart
|| id == CSSValueFlexEnd || id == CSSValueLeft || id == CSSValueRight;
}
bool CSSParser::parseJustifySelf(CSSPropertyID propId, bool important)
{
// auto | baseline | stretch | [<item-position> && <overflow-position>? ]
// <item-position> = center | start | end | self-start | self-end | flex-start | flex-end | left | right;
// <overflow-position> = true | safe
CSSParserValue* value = m_valueList->current();
if (value->id == CSSValueAuto || value->id == CSSValueBaseline || value->id == CSSValueStretch) {
if (m_valueList->next())
return false;
addProperty(propId, cssValuePool().createIdentifierValue(value->id), important);
return true;
}
RefPtr<CSSPrimitiveValue> position = 0;
RefPtr<CSSPrimitiveValue> overflowAlignmentKeyword = 0;
if (isItemPositionKeyword(value->id)) {
position = cssValuePool().createIdentifierValue(value->id);
value = m_valueList->next();
if (value) {
if (value->id != CSSValueTrue && value->id != CSSValueSafe)
return false;
overflowAlignmentKeyword = cssValuePool().createIdentifierValue(value->id);
}
} else if (value->id != CSSValueTrue && value->id != CSSValueSafe)
return false;
else {
overflowAlignmentKeyword = cssValuePool().createIdentifierValue(value->id);
value = m_valueList->next();
if (value) {
if (!isItemPositionKeyword(value->id))
return false;
position = cssValuePool().createIdentifierValue(value->id);
}
}
if (m_valueList->next())
return false;
ASSERT(position);
if (overflowAlignmentKeyword)
addProperty(propId, createPrimitiveValuePair(position.release(), overflowAlignmentKeyword.release()), important);
else
addProperty(propId, position.release(), important);
return true;
}
static bool parseBackgroundClip(CSSParserValue* parserValue, RefPtr<CSSValue>& cssValue)
{
if (parserValue->id == CSSValueBorderBox || parserValue->id == CSSValuePaddingBox
|| parserValue->id == CSSValueContentBox || parserValue->id == CSSValueWebkitText) {
cssValue = cssValuePool().createIdentifierValue(parserValue->id);
return true;
}
return false;
}
bool CSSParser::useLegacyBackgroundSizeShorthandBehavior() const
{
return m_context.useLegacyBackgroundSizeShorthandBehavior;
}
#if ENABLE(CSS_SCROLL_SNAP)
bool CSSParser::parseNonElementSnapPoints(CSSPropertyID propId, bool important)
{
RefPtr<CSSValueList> values = CSSValueList::createSpaceSeparated();
while (CSSParserValue* val = m_valueList->current()) {
if (validUnit(val, FPercent | FLength))
values->append(createPrimitiveNumericValue(val));
else if (val->unit == CSSParserValue::Function
&& val->function->args != 0
&& val->function->args->size() == 1
&& equalIgnoringCase(val->function->name, "repeat(")) {
CSSParserValue* parserVal = val->function->args.get()->current();
if (validUnit(parserVal, FLength | FPercent)) {
values->append(cssValuePool().createValue(LengthRepeat::create(createPrimitiveNumericValue(parserVal))));
m_valueList->next();
if (m_valueList->current())
return false;
break;
}
} else
return false;
m_valueList->next();
}
if (values->length()) {
addProperty(propId, values.release(), important);
m_valueList->next();
return true;
}
return false;
}
bool CSSParser::parseScrollSnapDestination(CSSPropertyID propId, bool important)
{
RefPtr<CSSValueList> position = CSSValueList::createSpaceSeparated();
if (m_valueList->size() != 2)
return false;
CSSParserValue* curParserVal = m_valueList->current();
if (!validUnit(curParserVal, FPercent | FLength))
return false;
RefPtr<CSSValue> cssValueX = createPrimitiveNumericValue(curParserVal);
m_valueList->next();
curParserVal = m_valueList->current();
if (!validUnit(curParserVal, FPercent | FLength))
return false;
RefPtr<CSSValue> cssValueY = createPrimitiveNumericValue(curParserVal);
position->append(cssValueX.releaseNonNull());
position->append(cssValueY.releaseNonNull());
addProperty(propId, position, important);
m_valueList->next();
return true;
}
bool CSSParser::parseScrollSnapCoordinate(CSSPropertyID propId, bool important)
{
RefPtr<CSSValueList> positions = CSSValueList::createSpaceSeparated();
while (m_valueList->current()) {
CSSParserValue* parsedValueX = m_valueList->current();
// Don't accept odd-length lists of coordinates.
if (!m_valueList->next())
return false;
CSSParserValue* parsedValueY = m_valueList->current();
if (!validUnit(parsedValueX, FPercent | FLength) || !validUnit(parsedValueY, FPercent | FLength))
return false;
positions->append(createPrimitiveNumericValue(parsedValueX));
positions->append(createPrimitiveNumericValue(parsedValueY));
m_valueList->next();
}
if (positions->length()) {
addProperty(propId, positions.release(), important);
return true;
}
return false;
}
#endif
const int cMaxFillProperties = 9;
bool CSSParser::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 };
RefPtr<CSSValue> values[cMaxFillProperties];
RefPtr<CSSValue> clipValue;
RefPtr<CSSValue> positionYValue;
RefPtr<CSSValue> repeatYValue;
bool foundClip = false;
int i;
bool foundPositionCSSProperty = false;
while (m_valueList->current()) {
CSSParserValue* val = m_valueList->current();
if (val->unit == CSSParserValue::Operator && val->iValue == ',') {
// We hit the end. Fill in all remaining values with the initial value.
m_valueList->next();
for (i = 0; i < numProperties; ++i) {
if (properties[i] == CSSPropertyBackgroundColor && parsedProperty[i])
// Color is not allowed except as the last item in a list for backgrounds.
// Reject the entire property.
return false;
if (!parsedProperty[i] && properties[i] != CSSPropertyBackgroundColor) {
addFillValue(values[i], cssValuePool().createImplicitInitialValue());
if (properties[i] == CSSPropertyBackgroundPosition || 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]) {
RefPtr<CSSValue> val1;
RefPtr<CSSValue> val2;
CSSPropertyID propId1, propId2;
CSSParserValue* parserValue = m_valueList->current();
if (parseFillProperty(properties[i], propId1, propId2, val1, val2)) {
parsedProperty[i] = found = true;
addFillValue(values[i], val1.releaseNonNull());
if (properties[i] == CSSPropertyBackgroundPosition || properties[i] == CSSPropertyWebkitMaskPosition)
addFillValue(positionYValue, val2.releaseNonNull());
if (properties[i] == CSSPropertyBackgroundRepeat || properties[i] == CSSPropertyWebkitMaskRepeat)
addFillValue(repeatYValue, val2.releaseNonNull());
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.releaseNonNull()); // 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)
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)
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] && 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);
}
return true;
}
void CSSParser::addAnimationValue(RefPtr<CSSValue>& lval, PassRef<CSSValue> rval)
{
if (!lval) {
lval = WTF::move(rval);
return;
}
if (is<CSSValueList>(*lval)) {
downcast<CSSValueList>(*lval).append(WTF::move(rval));
return;
}
auto list = CSSValueList::createCommaSeparated();
list.get().append(lval.releaseNonNull());
list.get().append(WTF::move(rval));
lval = WTF::move(list);
}
bool CSSParser::parseAnimationShorthand(bool important)
{
const StylePropertyShorthand& animationProperties = webkitAnimationShorthandForParsing();
const unsigned numProperties = 7;
// The list of properties in the shorthand should be the same
// length as the list with animation name in last position, even though they are
// in a different order.
ASSERT(numProperties == webkitAnimationShorthandForParsing().length());
ASSERT(numProperties == webkitAnimationShorthand().length());
ShorthandScope scope(this, CSSPropertyWebkitAnimation);
bool parsedProperty[numProperties] = { false };
AnimationParseContext context;
RefPtr<CSSValue> values[numProperties];
unsigned i;
while (m_valueList->current()) {
CSSParserValue* val = m_valueList->current();
if (val->unit == CSSParserValue::Operator && val->iValue == ',') {
// We hit the end. Fill in all remaining values with the initial value.
m_valueList->next();
for (i = 0; i < numProperties; ++i) {
if (!parsedProperty[i])
addAnimationValue(values[i], cssValuePool().createImplicitInitialValue());
parsedProperty[i] = false;
}
if (!m_valueList->current())
break;
context.commitFirstAnimation();
}
bool found = false;
for (i = 0; i < numProperties; ++i) {
if (!parsedProperty[i]) {
RefPtr<CSSValue> val;
if (parseAnimationProperty(animationProperties.properties()[i], val, context)) {
parsedProperty[i] = found = true;
addAnimationValue(values[i], val.releaseNonNull());
break;
}
}
// There are more values to process but 'none' or 'all' were already defined as the animation property, the declaration becomes invalid.
if (!context.animationPropertyKeywordAllowed() && context.hasCommittedFirstAnimation())
return false;
}
// if we didn't find at least one match, this is an
// invalid shorthand and we have to ignore it
if (!found)
return false;
}
for (i = 0; i < numProperties; ++i) {
// If we didn't find the property, set an intial value.
if (!parsedProperty[i])
addAnimationValue(values[i], cssValuePool().createImplicitInitialValue());
addProperty(animationProperties.properties()[i], values[i].release(), important);
}
return true;
}
bool CSSParser::parseTransitionShorthand(CSSPropertyID propId, bool important)
{
const unsigned numProperties = 4;
const StylePropertyShorthand& shorthand = shorthandForProperty(propId);
ASSERT(numProperties == shorthand.length());
ShorthandScope scope(this, propId);
bool parsedProperty[numProperties] = { false };
AnimationParseContext context;
RefPtr<CSSValue> values[numProperties];
unsigned i;
while (m_valueList->current()) {
CSSParserValue* val = m_valueList->current();
if (val->unit == CSSParserValue::Operator && val->iValue == ',') {
// We hit the end. Fill in all remaining values with the initial value.
m_valueList->next();
for (i = 0; i < numProperties; ++i) {
if (!parsedProperty[i])
addAnimationValue(values[i], cssValuePool().createImplicitInitialValue());
parsedProperty[i] = false;
}
if (!m_valueList->current())
break;
context.commitFirstAnimation();
}
bool found = false;
for (i = 0; !found && i < numProperties; ++i) {
if (!parsedProperty[i]) {
RefPtr<CSSValue> val;
if (parseAnimationProperty(shorthand.properties()[i], val, context)) {
parsedProperty[i] = found = true;
addAnimationValue(values[i], val.releaseNonNull());
}
// There are more values to process but 'none' or 'all' were already defined as the animation property, the declaration becomes invalid.
if (!context.animationPropertyKeywordAllowed() && context.hasCommittedFirstAnimation())
return false;
}
}
// if we didn't find at least one match, this is an
// invalid shorthand and we have to ignore it
if (!found)
return false;
}
// Fill in any remaining properties with the initial value.
for (i = 0; i < numProperties; ++i) {
if (!parsedProperty[i])
addAnimationValue(values[i], cssValuePool().createImplicitInitialValue());
}
// Now add all of the properties we found.
for (i = 0; i < numProperties; i++)
addPropertyWithPrefixingVariant(shorthand.properties()[i], values[i].release(), important);
return true;
}
bool CSSParser::parseShorthand(CSSPropertyID propId, const StylePropertyShorthand& shorthand, bool important)
{
// We try to match as many properties as possible
// We set up an array of booleans to mark which property has been found,
// and we try to search for properties until it makes no longer any sense.
ShorthandScope scope(this, propId);
bool found = false;
unsigned propertiesParsed = 0;
bool propertyFound[6]= { false, false, false, false, false, false }; // 6 is enough size.
while (m_valueList->current()) {
found = false;
for (unsigned propIndex = 0; !found && propIndex < shorthand.length(); ++propIndex) {
if (!propertyFound[propIndex] && parseValue(shorthand.properties()[propIndex], important)) {
propertyFound[propIndex] = found = true;
propertiesParsed++;
}
}
// if we didn't find at least one match, this is an
// invalid shorthand and we have to ignore it
if (!found)
return false;
}
if (propertiesParsed == shorthand.length())
return true;
// Fill in any remaining properties with the initial value.
ImplicitScope implicitScope(this, PropertyImplicit);
const StylePropertyShorthand* propertiesForInitialization = shorthand.propertiesForInitialization();
for (unsigned i = 0; i < shorthand.length(); ++i) {
if (propertyFound[i])
continue;
if (propertiesForInitialization) {
const StylePropertyShorthand& initProperties = propertiesForInitialization[i];
for (unsigned propIndex = 0; propIndex < initProperties.length(); ++propIndex)
addProperty(initProperties.properties()[propIndex], cssValuePool().createImplicitInitialValue(), important);
} else
addProperty(shorthand.properties()[i], cssValuePool().createImplicitInitialValue(), important);
}
return true;
}
bool CSSParser::parse4Values(CSSPropertyID propId, const CSSPropertyID *properties, bool important)
{
/* From the CSS 2 specs, 8.3
* If there is only one value, it applies to all sides. If there are two values, the top and
* bottom margins are set to the first value and the right and left margins are set to the second.
* If there are three values, the top is set to the first value, the left and right are set to the
* second, and the bottom is set to the third. If there are four values, they apply to the top,
* right, bottom, and left, respectively.
*/
unsigned num = inShorthand() ? 1 : m_valueList->size();
ShorthandScope scope(this, propId);
// the order is top, right, bottom, left
switch (num) {
case 1: {
if (!parseValue(properties[0], important))
return false;
CSSValue* value = m_parsedProperties.last().value();
ImplicitScope implicitScope(this, PropertyImplicit);
addProperty(properties[1], value, important);
addProperty(properties[2], value, important);
addProperty(properties[3], value, important);
break;
}
case 2: {
if (!parseValue(properties[0], important) || !parseValue(properties[1], important))
return false;
CSSValue* value = m_parsedProperties[m_parsedProperties.size() - 2].value();
ImplicitScope implicitScope(this, PropertyImplicit);
addProperty(properties[2], value, important);
value = m_parsedProperties[m_parsedProperties.size() - 2].value();
addProperty(properties[3], value, important);
break;
}
case 3: {
if (!parseValue(properties[0], important) || !parseValue(properties[1], important) || !parseValue(properties[2], important))
return false;
CSSValue* value = m_parsedProperties[m_parsedProperties.size() - 2].value();
ImplicitScope implicitScope(this, PropertyImplicit);
addProperty(properties[3], value, important);
break;
}
case 4: {
if (!parseValue(properties[0], important) || !parseValue(properties[1], important) ||
!parseValue(properties[2], important) || !parseValue(properties[3], important))
return false;
break;
}
default: {
return false;
}
}
return true;
}
// auto | <identifier>
bool CSSParser::parsePage(CSSPropertyID propId, bool important)
{
ASSERT(propId == CSSPropertyPage);
if (m_valueList->size() != 1)
return false;
CSSParserValue* value = m_valueList->current();
if (!value)
return false;
if (value->id == CSSValueAuto) {
addProperty(propId, cssValuePool().createIdentifierValue(value->id), important);
return true;
} else if (value->id == 0 && value->unit == CSSPrimitiveValue::CSS_IDENT) {
addProperty(propId, createPrimitiveStringValue(value), important);
return true;
}
return false;
}
// <length>{1,2} | auto | [ <page-size> || [ portrait | landscape] ]
bool CSSParser::parseSize(CSSPropertyID propId, bool important)
{
ASSERT(propId == CSSPropertySize);
if (m_valueList->size() > 2)
return false;
CSSParserValue* value = m_valueList->current();
if (!value)
return false;
RefPtr<CSSValueList> parsedValues = CSSValueList::createSpaceSeparated();
// First parameter.
SizeParameterType paramType = parseSizeParameter(parsedValues.get(), value, None);
if (paramType == None)
return false;
// Second parameter, if any.
value = m_valueList->next();
if (value) {
paramType = parseSizeParameter(parsedValues.get(), value, paramType);
if (paramType == None)
return false;
}
addProperty(propId, parsedValues.release(), important);
return true;
}
CSSParser::SizeParameterType CSSParser::parseSizeParameter(CSSValueList* parsedValues, CSSParserValue* value, SizeParameterType prevParamType)
{
switch (value->id) {
case CSSValueAuto:
if (prevParamType == None) {
parsedValues->append(cssValuePool().createIdentifierValue(value->id));
return Auto;
}
return None;
case CSSValueLandscape:
case CSSValuePortrait:
if (prevParamType == None || prevParamType == PageSize) {
parsedValues->append(cssValuePool().createIdentifierValue(value->id));
return Orientation;
}
return None;
case CSSValueA3:
case CSSValueA4:
case CSSValueA5:
case CSSValueB4:
case CSSValueB5:
case CSSValueLedger:
case CSSValueLegal:
case CSSValueLetter:
if (prevParamType == None || prevParamType == Orientation) {
// Normalize to Page Size then Orientation order by prepending.
// This is not specified by the CSS3 Paged Media specification, but for simpler processing later (StyleResolver::applyPageSizeProperty).
parsedValues->prepend(cssValuePool().createIdentifierValue(value->id));
return PageSize;
}
return None;
case 0:
if (validUnit(value, FLength | FNonNeg) && (prevParamType == None || prevParamType == Length)) {
parsedValues->append(createPrimitiveNumericValue(value));
return Length;
}
return None;
default:
return None;
}
}
// [ <string> <string> ]+ | inherit | none
// inherit and none are handled in parseValue.
bool CSSParser::parseQuotes(CSSPropertyID propId, bool important)
{
RefPtr<CSSValueList> values = CSSValueList::createCommaSeparated();
while (CSSParserValue* val = m_valueList->current()) {
if (val->unit != CSSPrimitiveValue::CSS_STRING)
break;
values->append(CSSPrimitiveValue::create(val->string, CSSPrimitiveValue::CSS_STRING));
m_valueList->next();
}
if (values->length()) {
addProperty(propId, values.release(), important);
m_valueList->next();
return true;
}
return false;
}
bool CSSParser::parseAlt(CSSPropertyID propID, bool important)
{
CSSParserValue* val = m_valueList->current();
RefPtr<CSSValue> parsedValue;
if (val->unit == CSSPrimitiveValue::CSS_STRING)
parsedValue = createPrimitiveStringValue(val);
else if (val->unit == CSSParserValue::Function) {
CSSParserValueList* args = val->function->args.get();
if (!args)
return false;
if (equalIgnoringCase(val->function->name, "attr("))
parsedValue = parseAttr(args);
}
if (parsedValue) {
addProperty(propID, parsedValue.release(), important);
m_valueList->next();
return true;
}
return false;
}
// [ <string> | <uri> | <counter> | attr(X) | open-quote | close-quote | no-open-quote | no-close-quote ]+ | inherit
// in CSS 2.1 this got somewhat reduced:
// [ <string> | attr(X) | open-quote | close-quote | no-open-quote | no-close-quote ]+ | inherit
bool CSSParser::parseContent(CSSPropertyID propId, bool important)
{
RefPtr<CSSValueList> values = CSSValueList::createCommaSeparated();
while (CSSParserValue* val = m_valueList->current()) {
RefPtr<CSSValue> parsedValue;
if (val->unit == CSSPrimitiveValue::CSS_URI) {
// url
parsedValue = CSSImageValue::create(completeURL(val->string));
} else if (val->unit == CSSParserValue::Function) {
// attr(X) | counter(X [,Y]) | counters(X, Y, [,Z]) | -webkit-gradient(...)
CSSParserValueList* args = val->function->args.get();
if (!args)
return false;
if (equalIgnoringCase(val->function->name, "attr(")) {
parsedValue = parseAttr(args);
if (!parsedValue)
return false;
} else if (equalIgnoringCase(val->function->name, "counter(")) {
parsedValue = parseCounterContent(args, false);
if (!parsedValue)
return false;
} else if (equalIgnoringCase(val->function->name, "counters(")) {
parsedValue = parseCounterContent(args, true);
if (!parsedValue)
return false;
#if ENABLE(CSS_IMAGE_SET)
} else if (equalIgnoringCase(val->function->name, "-webkit-image-set(")) {
parsedValue = parseImageSet();
if (!parsedValue)
return false;
#endif
} else if (isGeneratedImageValue(val)) {
if (!parseGeneratedImage(m_valueList.get(), parsedValue))
return false;
} else
return false;
} else if (val->unit == CSSPrimitiveValue::CSS_IDENT) {
// open-quote
// close-quote
// no-open-quote
// no-close-quote
// inherit
// FIXME: These are not yet implemented (http://bugs.webkit.org/show_bug.cgi?id=6503).
// none
// normal
switch (val->id) {
case CSSValueOpenQuote:
case CSSValueCloseQuote:
case CSSValueNoOpenQuote:
case CSSValueNoCloseQuote:
case CSSValueNone:
case CSSValueNormal:
parsedValue = cssValuePool().createIdentifierValue(val->id);
break;
default:
break;
}
} else if (val->unit == CSSPrimitiveValue::CSS_STRING) {
parsedValue = createPrimitiveStringValue(val);
}
if (!parsedValue)
break;
values->append(parsedValue.releaseNonNull());
m_valueList->next();
}
if (values->length()) {
addProperty(propId, values.release(), important);
m_valueList->next();
return true;
}
return false;
}
PassRefPtr<CSSValue> CSSParser::parseAttr(CSSParserValueList* args)
{
if (args->size() != 1)
return 0;
CSSParserValue* a = args->current();
if (a->unit != CSSPrimitiveValue::CSS_IDENT)
return 0;
String attrName = a->string;
// CSS allows identifiers with "-" at the start, like "-webkit-mask-image".
// But HTML attribute names can't have those characters, and we should not
// even parse them inside attr().
if (attrName[0] == '-')
return 0;
if (m_context.isHTMLDocument)
attrName = attrName.lower();
return cssValuePool().createValue(attrName, CSSPrimitiveValue::CSS_ATTR);
}
PassRefPtr<CSSValue> CSSParser::parseBackgroundColor()
{
CSSValueID id = m_valueList->current()->id;
if (id == CSSValueWebkitText || (id >= CSSValueAqua && id <= CSSValueWindowtext) || id == CSSValueMenu || id == CSSValueCurrentcolor ||
(id >= CSSValueGrey && id < CSSValueWebkitText && inQuirksMode()))
return cssValuePool().createIdentifierValue(id);
return parseColor();
}
bool CSSParser::parseFillImage(CSSParserValueList* valueList, RefPtr<CSSValue>& value)
{
if (valueList->current()->id == CSSValueNone) {
value = cssValuePool().createIdentifierValue(CSSValueNone);
return true;
}
if (valueList->current()->unit == CSSPrimitiveValue::CSS_URI) {
value = CSSImageValue::create(completeURL(valueList->current()->string));
return true;
}
if (isGeneratedImageValue(valueList->current()))
return parseGeneratedImage(valueList, value);
#if ENABLE(CSS_IMAGE_SET)
if (valueList->current()->unit == CSSParserValue::Function && equalIgnoringCase(valueList->current()->function->name, "-webkit-image-set(")) {
value = parseImageSet();
if (value)
return true;
}
#endif
return false;
}
PassRefPtr<CSSValue> CSSParser::parseFillPositionX(CSSParserValueList* valueList)
{
int id = valueList->current()->id;
if (id == CSSValueLeft || id == CSSValueRight || id == CSSValueCenter) {
int percent = 0;
if (id == CSSValueRight)
percent = 100;
else if (id == CSSValueCenter)
percent = 50;
return cssValuePool().createValue(percent, CSSPrimitiveValue::CSS_PERCENTAGE);
}
if (validUnit(valueList->current(), FPercent | FLength))
return createPrimitiveNumericValue(valueList->current());
return 0;
}
PassRefPtr<CSSValue> CSSParser::parseFillPositionY(CSSParserValueList* valueList)
{
int id = valueList->current()->id;
if (id == CSSValueTop || id == CSSValueBottom || id == CSSValueCenter) {
int percent = 0;
if (id == CSSValueBottom)
percent = 100;
else if (id == CSSValueCenter)
percent = 50;
return cssValuePool().createValue(percent, CSSPrimitiveValue::CSS_PERCENTAGE);
}
if (validUnit(valueList->current(), FPercent | FLength))
return createPrimitiveNumericValue(valueList->current());
return 0;
}
PassRefPtr<CSSPrimitiveValue> CSSParser::parseFillPositionComponent(CSSParserValueList* valueList, unsigned& cumulativeFlags, FillPositionFlag& individualFlag, FillPositionParsingMode parsingMode)
{
CSSValueID id = valueList->current()->id;
if (id == CSSValueLeft || id == CSSValueTop || id == CSSValueRight || id == CSSValueBottom || id == CSSValueCenter) {
int percent = 0;
if (id == CSSValueLeft || id == CSSValueRight) {
if (cumulativeFlags & XFillPosition)
return 0;
cumulativeFlags |= XFillPosition;
individualFlag = XFillPosition;
if (id == CSSValueRight)
percent = 100;
}
else if (id == CSSValueTop || id == CSSValueBottom) {
if (cumulativeFlags & YFillPosition)
return 0;
cumulativeFlags |= YFillPosition;
individualFlag = YFillPosition;
if (id == CSSValueBottom)
percent = 100;
} else if (id == CSSValueCenter) {
// Center is ambiguous, so we're not sure which position we've found yet, an x or a y.
percent = 50;
cumulativeFlags |= AmbiguousFillPosition;
individualFlag = AmbiguousFillPosition;
}
if (parsingMode == ResolveValuesAsKeyword)
return cssValuePool().createIdentifierValue(id);
return cssValuePool().createValue(percent, CSSPrimitiveValue::CSS_PERCENTAGE);
}
if (validUnit(valueList->current(), FPercent | FLength)) {
if (!cumulativeFlags) {
cumulativeFlags |= XFillPosition;
individualFlag = XFillPosition;
} else if (cumulativeFlags & (XFillPosition | AmbiguousFillPosition)) {
cumulativeFlags |= YFillPosition;
individualFlag = YFillPosition;
} else {
if (m_parsedCalculation)
m_parsedCalculation.release();
return 0;
}
return createPrimitiveNumericValue(valueList->current());
}
return 0;
}
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 CSSParser::parse4ValuesFillPosition(CSSParserValueList* valueList, RefPtr<CSSValue>& value1, RefPtr<CSSValue>& value2, PassRefPtr<CSSPrimitiveValue> parsedValue1, PassRefPtr<CSSPrimitiveValue> parsedValue2)
{
// [ left | right ] [ <percentage] | <length> ] && [ top | bottom ] [ <percentage> | <length> ]
// In the case of 4 values <position> requires the second value to be a length or a percentage.
if (isFillPositionKeyword(parsedValue2->getValueID()))
return;
unsigned cumulativeFlags = 0;
FillPositionFlag value3Flag = InvalidFillPosition;
RefPtr<CSSPrimitiveValue> value3 = parseFillPositionComponent(valueList, cumulativeFlags, value3Flag, ResolveValuesAsKeyword);
if (!value3)
return;
CSSValueID ident1 = parsedValue1->getValueID();
CSSValueID ident3 = value3->getValueID();
if (ident1 == CSSValueCenter)
return;
if (!isFillPositionKeyword(ident3) || ident3 == CSSValueCenter)
return;
// We need to check if the values are not conflicting, e.g. they are not on the same edge. It is
// needed as the second call to parseFillPositionComponent was on purpose not checking it. In the
// case of two values top 20px is invalid but in the case of 4 values it becomes valid.
if (isValueConflictingWithCurrentEdge(ident1, ident3))
return;
valueList->next();
cumulativeFlags = 0;
FillPositionFlag value4Flag = InvalidFillPosition;
RefPtr<CSSPrimitiveValue> value4 = parseFillPositionComponent(valueList, cumulativeFlags, value4Flag, ResolveValuesAsKeyword);
if (!value4)
return;
// 4th value must be a length or a percentage.
if (isFillPositionKeyword(value4->getValueID()))
return;
value1 = createPrimitiveValuePair(parsedValue1, parsedValue2);
value2 = createPrimitiveValuePair(value3, value4);
if (ident1 == CSSValueTop || ident1 == CSSValueBottom)
value1.swap(value2);
valueList->next();
}
void CSSParser::parse3ValuesFillPosition(CSSParserValueList* valueList, RefPtr<CSSValue>& value1, RefPtr<CSSValue>& value2, PassRefPtr<CSSPrimitiveValue> parsedValue1, PassRefPtr<CSSPrimitiveValue> parsedValue2)
{
unsigned cumulativeFlags = 0;
FillPositionFlag value3Flag = InvalidFillPosition;
RefPtr<CSSPrimitiveValue> value3 = parseFillPositionComponent(valueList, cumulativeFlags, value3Flag, ResolveValuesAsKeyword);
// value3 is not an expected value, we return.
if (!value3)
return;
valueList->next();
bool swapNeeded = false;
CSSValueID ident1 = parsedValue1->getValueID();
CSSValueID ident2 = parsedValue2->getValueID();
CSSValueID ident3 = value3->getValueID();
CSSValueID firstPositionKeyword;
CSSValueID secondPositionKeyword;
if (ident1 == CSSValueCenter) {
// <position> requires the first 'center' to be followed by a keyword.
if (!isFillPositionKeyword(ident2))
return;
// If 'center' is the first keyword then the last one needs to be a length.
if (isFillPositionKeyword(ident3))
return;
firstPositionKeyword = CSSValueLeft;
if (ident2 == CSSValueLeft || ident2 == CSSValueRight) {
firstPositionKeyword = CSSValueTop;
swapNeeded = true;
}
value1 = createPrimitiveValuePair(cssValuePool().createIdentifierValue(firstPositionKeyword), cssValuePool().createValue(50, CSSPrimitiveValue::CSS_PERCENTAGE));
value2 = createPrimitiveValuePair(parsedValue2, value3);
} else if (ident3 == CSSValueCenter) {
if (isFillPositionKeyword(ident2))
return;
secondPositionKeyword = CSSValueTop;
if (ident1 == CSSValueTop || ident1 == CSSValueBottom) {
secondPositionKeyword = CSSValueLeft;
swapNeeded = true;
}
value1 = createPrimitiveValuePair(parsedValue1, parsedValue2);
value2 = createPrimitiveValuePair(cssValuePool().createIdentifierValue(secondPositionKeyword), cssValuePool().createValue(50, CSSPrimitiveValue::CSS_PERCENTAGE));
} else {
RefPtr<CSSPrimitiveValue> firstPositionValue;
RefPtr<CSSPrimitiveValue> secondPositionValue;
if (isFillPositionKeyword(ident2)) {
// To match CSS grammar, we should only accept: [ center | left | right | bottom | top ] [ left | right | top | bottom ] [ <percentage> | <length> ].
ASSERT(ident2 != CSSValueCenter);
if (isFillPositionKeyword(ident3))
return;
secondPositionValue = value3;
secondPositionKeyword = ident2;
firstPositionValue = cssValuePool().createValue(0, CSSPrimitiveValue::CSS_PERCENTAGE);
} else {
// Per CSS, we should only accept: [ right | left | top | bottom ] [ <percentage> | <length> ] [ center | left | right | bottom | top ].
if (!isFillPositionKeyword(ident3))
return;
firstPositionValue = parsedValue2;
secondPositionKeyword = ident3;
secondPositionValue = cssValuePool().createValue(0, CSSPrimitiveValue::CSS_PERCENTAGE);
}
if (isValueConflictingWithCurrentEdge(ident1, secondPositionKeyword))
return;
value1 = createPrimitiveValuePair(parsedValue1, firstPositionValue);
value2 = createPrimitiveValuePair(cssValuePool().createIdentifierValue(secondPositionKeyword), secondPositionValue);
}
if (ident1 == CSSValueTop || ident1 == CSSValueBottom || swapNeeded)
value1.swap(value2);
#ifndef NDEBUG
CSSPrimitiveValue& first = downcast<CSSPrimitiveValue>(*value1);
CSSPrimitiveValue& second = downcast<CSSPrimitiveValue>(*value2);
ident1 = first.getPairValue()->first()->getValueID();
ident2 = second.getPairValue()->first()->getValueID();
ASSERT(ident1 == CSSValueLeft || ident1 == CSSValueRight);
ASSERT(ident2 == CSSValueBottom || ident2 == CSSValueTop);
#endif
}
inline bool CSSParser::isPotentialPositionValue(CSSParserValue* value)
{
return isFillPositionKeyword(value->id) || validUnit(value, FPercent | FLength, ReleaseParsedCalcValue);
}
void CSSParser::parseFillPosition(CSSParserValueList* valueList, RefPtr<CSSValue>& value1, RefPtr<CSSValue>& value2)
{
unsigned numberOfValues = 0;
for (unsigned i = valueList->currentIndex(); i < valueList->size(); ++i, ++numberOfValues) {
CSSParserValue* current = valueList->valueAt(i);
if (isComma(current) || !current || isForwardSlashOperator(current) || !isPotentialPositionValue(current))
break;
}
if (numberOfValues > 4)
return;
// If we are parsing two values, we can safely call the CSS 2.1 parsing function and return.
if (numberOfValues <= 2) {
parse2ValuesFillPosition(valueList, value1, value2);
return;
}
ASSERT(numberOfValues > 2 && numberOfValues <= 4);
CSSParserValue* value = valueList->current();
// <position> requires the first value to be a background keyword.
if (!isFillPositionKeyword(value->id))
return;
// Parse the first value. We're just making sure that it is one of the valid keywords or a percentage/length.
unsigned cumulativeFlags = 0;
FillPositionFlag value1Flag = InvalidFillPosition;
FillPositionFlag value2Flag = InvalidFillPosition;
value1 = parseFillPositionComponent(valueList, cumulativeFlags, value1Flag, ResolveValuesAsKeyword);
if (!value1)
return;
value = valueList->next();
// In case we are parsing more than two values, relax the check inside of parseFillPositionComponent. top 20px is
// a valid start for <position>.
cumulativeFlags = AmbiguousFillPosition;
value2 = parseFillPositionComponent(valueList, cumulativeFlags, value2Flag, ResolveValuesAsKeyword);
if (value2)
valueList->next();
else {
value1.clear();
return;
}
RefPtr<CSSPrimitiveValue> parsedValue1 = downcast<CSSPrimitiveValue>(value1.get());
RefPtr<CSSPrimitiveValue> parsedValue2 = downcast<CSSPrimitiveValue>(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 CSSParser::parse2ValuesFillPosition(CSSParserValueList* valueList, RefPtr<CSSValue>& value1, RefPtr<CSSValue>& value2)
{
CSSParserValue* value = valueList->current();
// Parse the first value. We're just making sure that it is one of the valid keywords or a percentage/length.
unsigned cumulativeFlags = 0;
FillPositionFlag value1Flag = InvalidFillPosition;
FillPositionFlag value2Flag = InvalidFillPosition;
value1 = parseFillPositionComponent(valueList, cumulativeFlags, value1Flag);
if (!value1)
return;
// It only takes one value for background-position to be correctly parsed if it was specified in a shorthand (since we
// can assume that any other values belong to the rest of the shorthand). If we're not parsing a shorthand, though, the
// value was explicitly specified for our property.
value = valueList->next();
// First check for the comma. If so, we are finished parsing this value or value pair.
if (isComma(value))
value = 0;
if (value) {
value2 = parseFillPositionComponent(valueList, cumulativeFlags, value2Flag);
if (value2)
valueList->next();
else {
if (!inShorthand()) {
value1.clear();
return;
}
}
}
if (!value2)
// Only one value was specified. If that value was not a keyword, then it sets the x position, and the y position
// is simply 50%. This is our default.
// For keywords, the keyword was either an x-keyword (left/right), a y-keyword (top/bottom), or an ambiguous keyword (center).
// For left/right/center, the default of 50% in the y is still correct.
value2 = cssValuePool().createValue(50, CSSPrimitiveValue::CSS_PERCENTAGE);
if (value1Flag == YFillPosition || value2Flag == XFillPosition)
value1.swap(value2);
}
void CSSParser::parseFillRepeat(RefPtr<CSSValue>& value1, RefPtr<CSSValue>& value2)
{
CSSValueID id = m_valueList->current()->id;
if (id == CSSValueRepeatX) {
m_implicitShorthand = true;
value1 = cssValuePool().createIdentifierValue(CSSValueRepeat);
value2 = cssValuePool().createIdentifierValue(CSSValueNoRepeat);
m_valueList->next();
return;
}
if (id == CSSValueRepeatY) {
m_implicitShorthand = true;
value1 = cssValuePool().createIdentifierValue(CSSValueNoRepeat);
value2 = cssValuePool().createIdentifierValue(CSSValueRepeat);
m_valueList->next();
return;
}
if (id == CSSValueRepeat || id == CSSValueNoRepeat || id == CSSValueRound || id == CSSValueSpace)
value1 = cssValuePool().createIdentifierValue(id);
else {
value1 = 0;
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(downcast<CSSPrimitiveValue>(*value1).getValueID());
}
PassRefPtr<CSSValue> CSSParser::parseFillSize(CSSPropertyID propId, bool& allowComma)
{
allowComma = true;
CSSParserValue* value = m_valueList->current();
if (value->id == CSSValueContain || value->id == CSSValueCover)
return cssValuePool().createIdentifierValue(value->id);
RefPtr<CSSPrimitiveValue> parsedValue1;
if (value->id == CSSValueAuto)
parsedValue1 = cssValuePool().createIdentifierValue(CSSValueAuto);
else {
if (!validUnit(value, FLength | FPercent))
return 0;
parsedValue1 = createPrimitiveNumericValue(value);
}
RefPtr<CSSPrimitiveValue> parsedValue2;
if ((value = m_valueList->next())) {
if (value->unit == CSSParserValue::Operator && value->iValue == ',')
allowComma = false;
else if (value->id != CSSValueAuto) {
if (!validUnit(value, FLength | FPercent)) {
if (!inShorthand())
return 0;
// We need to rewind the value list, so that when it is advanced we'll end up back at this value.
m_valueList->previous();
} else
parsedValue2 = createPrimitiveNumericValue(value);
}
} else if (!parsedValue2 && propId == CSSPropertyWebkitBackgroundSize) {
// 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 createPrimitiveValuePair(parsedValue1.release(), parsedValue2.release());
}
bool CSSParser::parseFillProperty(CSSPropertyID propId, CSSPropertyID& propId1, CSSPropertyID& propId2,
RefPtr<CSSValue>& retValue1, RefPtr<CSSValue>& retValue2)
{
RefPtr<CSSValueList> values;
RefPtr<CSSValueList> values2;
CSSParserValue* val;
RefPtr<CSSValue> value;
RefPtr<CSSValue> value2;
bool allowComma = false;
retValue1 = retValue2 = 0;
propId1 = propId;
propId2 = propId;
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 ((val = m_valueList->current())) {
RefPtr<CSSValue> currValue;
RefPtr<CSSValue> currValue2;
if (allowComma) {
if (!isComma(val))
return false;
m_valueList->next();
allowComma = false;
} else {
allowComma = true;
switch (propId) {
case CSSPropertyBackgroundColor:
currValue = parseBackgroundColor();
if (currValue)
m_valueList->next();
break;
case CSSPropertyBackgroundAttachment:
if (val->id == CSSValueScroll || val->id == CSSValueFixed || val->id == CSSValueLocal) {
currValue = cssValuePool().createIdentifierValue(val->id);
m_valueList->next();
}
break;
case CSSPropertyBackgroundImage:
case CSSPropertyWebkitMaskImage:
if (parseFillImage(m_valueList.get(), 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))) {
currValue = cssValuePool().createIdentifierValue(val->id);
m_valueList->next();
}
break;
case CSSPropertyBackgroundClip:
if (parseBackgroundClip(val, currValue))
m_valueList->next();
break;
case CSSPropertyBackgroundOrigin:
if (val->id == CSSValueBorderBox || val->id == CSSValuePaddingBox || val->id == CSSValueContentBox) {
currValue = cssValuePool().createIdentifierValue(val->id);
m_valueList->next();
}
break;
case CSSPropertyBackgroundPosition:
case CSSPropertyWebkitMaskPosition:
parseFillPosition(m_valueList.get(), currValue, currValue2);
// parseFillPosition advances the m_valueList pointer.
break;
case CSSPropertyBackgroundPositionX:
case CSSPropertyWebkitMaskPositionX: {
currValue = parseFillPositionX(m_valueList.get());
if (currValue)
m_valueList->next();
break;
}
case CSSPropertyBackgroundPositionY:
case CSSPropertyWebkitMaskPositionY: {
currValue = parseFillPositionY(m_valueList.get());
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 (cssCompositingEnabled() && (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)) {
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 CSSPropertyWebkitBackgroundSize:
case CSSPropertyWebkitMaskSize: {
currValue = parseFillSize(propId, allowComma);
if (currValue)
m_valueList->next();
break;
}
case CSSPropertyWebkitMaskSourceType: {
if (val->id == CSSValueAuto || val->id == CSSValueAlpha || val->id == CSSValueLuminance) {
currValue = cssValuePool().createIdentifierValue(val->id);
m_valueList->next();
} else
currValue = 0;
break;
}
default:
break;
}
if (!currValue)
return false;
if (value && !values) {
values = CSSValueList::createCommaSeparated();
values->append(value.releaseNonNull());
}
if (value2 && !values2) {
values2 = CSSValueList::createCommaSeparated();
values2->append(value2.releaseNonNull());
}
if (values)
values->append(currValue.releaseNonNull());
else
value = currValue.release();
if (currValue2) {
if (values2)
values2->append(currValue2.releaseNonNull());
else
value2 = currValue2.release();
}
}
// When parsing any fill shorthand property, we let it handle building up the lists for all
// properties.
if (inShorthand())
break;
}
if (values && values->length()) {
retValue1 = values.release();
if (values2 && values2->length())
retValue2 = values2.release();
return true;
}
if (value) {
retValue1 = value.release();
retValue2 = value2.release();
return true;
}
return false;
}
PassRefPtr<CSSValue> CSSParser::parseAnimationDelay()
{
CSSParserValue* value = m_valueList->current();
if (validUnit(value, FTime))
return createPrimitiveNumericValue(value);
return 0;
}
PassRefPtr<CSSValue> CSSParser::parseAnimationDirection()
{
CSSParserValue* value = m_valueList->current();
if (value->id == CSSValueNormal || value->id == CSSValueAlternate || value->id == CSSValueReverse || value->id == CSSValueAlternateReverse)
return cssValuePool().createIdentifierValue(value->id);
return 0;
}
PassRefPtr<CSSValue> CSSParser::parseAnimationDuration()
{
CSSParserValue* value = m_valueList->current();
if (validUnit(value, FTime | FNonNeg))
return createPrimitiveNumericValue(value);
return 0;
}
PassRefPtr<CSSValue> CSSParser::parseAnimationFillMode()
{
CSSParserValue* value = m_valueList->current();
if (value->id == CSSValueNone || value->id == CSSValueForwards || value->id == CSSValueBackwards || value->id == CSSValueBoth)
return cssValuePool().createIdentifierValue(value->id);
return 0;
}
PassRefPtr<CSSValue> CSSParser::parseAnimationIterationCount()
{
CSSParserValue* value = m_valueList->current();
if (value->id == CSSValueInfinite)
return cssValuePool().createIdentifierValue(value->id);
if (validUnit(value, FNumber | FNonNeg))
return createPrimitiveNumericValue(value);
return 0;
}
PassRefPtr<CSSValue> CSSParser::parseAnimationName()
{
CSSParserValue* value = m_valueList->current();
if (value->unit == CSSPrimitiveValue::CSS_STRING || value->unit == CSSPrimitiveValue::CSS_IDENT) {
if (value->id == CSSValueNone || (value->unit == CSSPrimitiveValue::CSS_STRING && equalIgnoringCase(value, "none"))) {
return cssValuePool().createIdentifierValue(CSSValueNone);
} else {
return createPrimitiveStringValue(value);
}
}
return 0;
}
PassRefPtr<CSSValue> CSSParser::parseAnimationPlayState()
{
CSSParserValue* value = m_valueList->current();
if (value->id == CSSValueRunning || value->id == CSSValuePaused)
return cssValuePool().createIdentifierValue(value->id);
return 0;
}
PassRefPtr<CSSValue> CSSParser::parseAnimationProperty(AnimationParseContext& context)
{
CSSParserValue* value = m_valueList->current();
if (value->unit != CSSPrimitiveValue::CSS_IDENT)
return 0;
CSSPropertyID result = cssPropertyID(value->string);
if (result)
return cssValuePool().createIdentifierValue(result);
if (equalIgnoringCase(value, "all")) {
context.sawAnimationPropertyKeyword();
return cssValuePool().createIdentifierValue(CSSValueAll);
}
if (equalIgnoringCase(value, "none")) {
context.commitAnimationPropertyKeyword();
context.sawAnimationPropertyKeyword();
return cssValuePool().createIdentifierValue(CSSValueNone);
}
return 0;
}
bool CSSParser::parseTransformOriginShorthand(RefPtr<CSSValue>& value1, RefPtr<CSSValue>& value2, RefPtr<CSSValue>& value3)
{
parse2ValuesFillPosition(m_valueList.get(), value1, value2);
// now get z
if (m_valueList->current()) {
if (validUnit(m_valueList->current(), FLength)) {
value3 = createPrimitiveNumericValue(m_valueList->current());
m_valueList->next();
return true;
}
return false;
}
value3 = cssValuePool().createImplicitInitialValue();
return true;
}
bool CSSParser::parseCubicBezierTimingFunctionValue(CSSParserValueList*& args, double& result)
{
CSSParserValue* v = args->current();
if (!validUnit(v, FNumber))
return false;
result = parsedDouble(v, ReleaseParsedCalcValue);
v = args->next();
if (!v)
// The last number in the function has no comma after it, so we're done.
return true;
if (!isComma(v))
return false;
args->next();
return true;
}
PassRefPtr<CSSValue> CSSParser::parseAnimationTimingFunction()
{
CSSParserValue* value = m_valueList->current();
if (value->id == CSSValueEase || value->id == CSSValueLinear || value->id == CSSValueEaseIn || value->id == CSSValueEaseOut
|| value->id == CSSValueEaseInOut || value->id == CSSValueStepStart || value->id == CSSValueStepEnd)
return cssValuePool().createIdentifierValue(value->id);
// We must be a function.
if (value->unit != CSSParserValue::Function)
return 0;
CSSParserValueList* args = value->function->args.get();
if (equalIgnoringCase(value->function->name, "steps(")) {
// For steps, 1 or 2 params must be specified (comma-separated)
if (!args || (args->size() != 1 && args->size() != 3))
return 0;
// There are two values.
int numSteps;
bool stepAtStart = false;
CSSParserValue* v = args->current();
if (!validUnit(v, FInteger))
return 0;
numSteps = clampToInteger(v->fValue);
if (numSteps < 1)
return 0;
v = args->next();
if (v) {
// There is a comma so we need to parse the second value
if (!isComma(v))
return 0;
v = args->next();
if (v->id != CSSValueStart && v->id != CSSValueEnd)
return 0;
stepAtStart = v->id == CSSValueStart;
}
return CSSStepsTimingFunctionValue::create(numSteps, stepAtStart);
}
if (equalIgnoringCase(value->function->name, "cubic-bezier(")) {
// For cubic bezier, 4 values must be specified.
if (!args || args->size() != 7)
return 0;
// There are two points specified. The x values must be between 0 and 1 but the y values can exceed this range.
double x1, y1, x2, y2;
if (!parseCubicBezierTimingFunctionValue(args, x1))
return 0;
if (x1 < 0 || x1 > 1)
return 0;
if (!parseCubicBezierTimingFunctionValue(args, y1))
return 0;
if (!parseCubicBezierTimingFunctionValue(args, x2))
return 0;
if (x2 < 0 || x2 > 1)
return 0;
if (!parseCubicBezierTimingFunctionValue(args, y2))
return 0;
return CSSCubicBezierTimingFunctionValue::create(x1, y1, x2, y2);
}
return 0;
}
bool CSSParser::parseAnimationProperty(CSSPropertyID propId, RefPtr<CSSValue>& result, AnimationParseContext& context)
{
RefPtr<CSSValueList> values;
CSSParserValue* val;
RefPtr<CSSValue> value;
bool allowComma = false;
result = 0;
while ((val = m_valueList->current())) {
RefPtr<CSSValue> currValue;
if (allowComma) {
if (!isComma(val))
return false;
m_valueList->next();
allowComma = false;
}
else {
switch (propId) {
case CSSPropertyWebkitAnimationDelay:
case CSSPropertyTransitionDelay:
case CSSPropertyWebkitTransitionDelay:
currValue = parseAnimationDelay();
if (currValue)
m_valueList->next();
break;
case CSSPropertyWebkitAnimationDirection:
currValue = parseAnimationDirection();
if (currValue)
m_valueList->next();
break;
case CSSPropertyWebkitAnimationDuration:
case CSSPropertyTransitionDuration:
case CSSPropertyWebkitTransitionDuration:
currValue = parseAnimationDuration();
if (currValue)
m_valueList->next();
break;
case CSSPropertyWebkitAnimationFillMode:
currValue = parseAnimationFillMode();
if (currValue)
m_valueList->next();
break;
case CSSPropertyWebkitAnimationIterationCount:
currValue = parseAnimationIterationCount();
if (currValue)
m_valueList->next();
break;
case CSSPropertyWebkitAnimationName:
currValue = parseAnimationName();
if (currValue)
m_valueList->next();
break;
case CSSPropertyWebkitAnimationPlayState:
currValue = parseAnimationPlayState();
if (currValue)
m_valueList->next();
break;
case CSSPropertyTransitionProperty:
case CSSPropertyWebkitTransitionProperty:
currValue = parseAnimationProperty(context);
if (value && !context.animationPropertyKeywordAllowed())
return false;
if (currValue)
m_valueList->next();
break;
case CSSPropertyWebkitAnimationTimingFunction:
case CSSPropertyTransitionTimingFunction:
case CSSPropertyWebkitTransitionTimingFunction:
currValue = parseAnimationTimingFunction();
if (currValue)
m_valueList->next();
break;
default:
ASSERT_NOT_REACHED();
return false;
}
if (!currValue)
return false;
if (value && !values) {
values = CSSValueList::createCommaSeparated();
values->append(value.releaseNonNull());
}
if (values)
values->append(currValue.releaseNonNull());
else
value = currValue.release();
allowComma = true;
}
// When parsing the 'transition' shorthand property, we let it handle building up the lists for all
// properties.
if (inShorthand())
break;
}
if (values && values->length()) {
result = values.release();
return true;
}
if (value) {
result = value.release();
return true;
}
return false;
}
#if ENABLE(CSS_GRID_LAYOUT)
static inline bool isValidCustomIdent(const CSSParserValue& value)
{
return value.unit == CSSPrimitiveValue::CSS_IDENT && value.id != CSSValueSpan && value.id != CSSValueAuto;
}
// The function parses [ <integer> || <custom-ident> ] in <grid-line> (which can be stand alone or with 'span').
bool CSSParser::parseIntegerOrCustomIdentFromGridPosition(RefPtr<CSSPrimitiveValue>& numericValue, RefPtr<CSSPrimitiveValue>& gridLineName)
{
CSSParserValue* value = m_valueList->current();
if (validUnit(value, FInteger) && value->fValue) {
numericValue = createPrimitiveNumericValue(value);
value = m_valueList->next();
if (value && isValidCustomIdent(*value)) {
gridLineName = createPrimitiveStringValue(m_valueList->current());
m_valueList->next();
}
return true;
}
if (isValidCustomIdent(*value)) {
gridLineName = createPrimitiveStringValue(m_valueList->current());
value = m_valueList->next();
if (value && validUnit(value, FInteger) && value->fValue) {
numericValue = createPrimitiveNumericValue(value);
m_valueList->next();
}
return true;
}
return false;
}
PassRefPtr<CSSValue> CSSParser::parseGridPosition()
{
CSSParserValue* value = m_valueList->current();
if (value->id == CSSValueAuto) {
m_valueList->next();
return cssValuePool().createIdentifierValue(CSSValueAuto);
}
RefPtr<CSSPrimitiveValue> numericValue;
RefPtr<CSSPrimitiveValue> gridLineName;
bool hasSeenSpanKeyword = false;
if (value->id == CSSValueSpan) {
hasSeenSpanKeyword = true;
if (auto* nextValue = m_valueList->next()) {
if (!isForwardSlashOperator(nextValue) && !parseIntegerOrCustomIdentFromGridPosition(numericValue, gridLineName))
return nullptr;
}
} else if (parseIntegerOrCustomIdentFromGridPosition(numericValue, gridLineName)) {
value = m_valueList->current();
if (value && value->id == CSSValueSpan) {
hasSeenSpanKeyword = true;
m_valueList->next();
}
}
// 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 cssValuePool().createValue(gridLineName->getStringValue(), CSSPrimitiveValue::CSS_STRING);
RefPtr<CSSValueList> values = CSSValueList::createSpaceSeparated();
if (hasSeenSpanKeyword)
values->append(cssValuePool().createIdentifierValue(CSSValueSpan));
if (numericValue)
values->append(numericValue.releaseNonNull());
if (gridLineName)
values->append(gridLineName.releaseNonNull());
ASSERT(values->length());
return values.release();
}
static PassRefPtr<CSSValue> gridMissingGridPositionValue(CSSValue* value)
{
if (is<CSSPrimitiveValue>(*value) && downcast<CSSPrimitiveValue>(*value).isString())
return value;
return cssValuePool().createIdentifierValue(CSSValueAuto);
}
bool CSSParser::parseGridItemPositionShorthand(CSSPropertyID shorthandId, bool important)
{
ShorthandScope scope(this, shorthandId);
const StylePropertyShorthand& shorthand = shorthandForProperty(shorthandId);
ASSERT(shorthand.length() == 2);
RefPtr<CSSValue> startValue = parseGridPosition();
if (!startValue)
return false;
RefPtr<CSSValue> endValue;
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 CSSParser::parseGridTemplateRowsAndAreas(PassRefPtr<CSSValue> templateColumns, bool important)
{
// At least template-areas strings must be defined.
if (!m_valueList->current())
return false;
NamedGridAreaMap gridAreaMap;
unsigned rowCount = 0;
unsigned columnCount = 0;
bool trailingIdentWasAdded = false;
RefPtr<CSSValueList> templateRows = CSSValueList::createSpaceSeparated();
do {
// Handle leading <custom-ident>*.
if (m_valueList->current()->unit == CSSParserValue::ValueList) {
if (trailingIdentWasAdded) {
// A row's trailing ident must be concatenated with the next row's leading one.
parseGridLineNames(*m_valueList, *templateRows, downcast<CSSGridLineNamesValue>(templateRows->item(templateRows->length() - 1)));
} else
parseGridLineNames(*m_valueList, *templateRows);
}
// Handle a template-area's row.
if (!parseGridTemplateAreasRow(gridAreaMap, rowCount, columnCount))
return false;
++rowCount;
// Handle template-rows's track-size.
if (m_valueList->current() && m_valueList->current()->unit != CSSParserValue::ValueList && m_valueList->current()->unit != CSSPrimitiveValue::CSS_STRING) {
RefPtr<CSSValue> value = parseGridTrackSize(*m_valueList);
if (!value)
return false;
templateRows->append(value.releaseNonNull());
} else
templateRows->append(cssValuePool().createIdentifierValue(CSSValueAuto));
// This will handle the trailing/leading <custom-ident>* in the grammar.
trailingIdentWasAdded = false;
if (m_valueList->current() && m_valueList->current()->unit == CSSParserValue::ValueList)
trailingIdentWasAdded = parseGridLineNames(*m_valueList, *templateRows);
} while (m_valueList->current());
// [<track-list> /]?
if (templateColumns)
addProperty(CSSPropertyWebkitGridTemplateColumns, templateColumns, important);
else
addProperty(CSSPropertyWebkitGridTemplateColumns, cssValuePool().createIdentifierValue(CSSValueNone), important);
// [<line-names>? <string> [<track-size> <line-names>]? ]+
RefPtr<CSSValue> templateAreas = CSSGridTemplateAreasValue::create(gridAreaMap, rowCount, columnCount);
addProperty(CSSPropertyWebkitGridTemplateAreas, templateAreas.release(), important);
addProperty(CSSPropertyWebkitGridTemplateRows, templateRows.release(), important);
return true;
}
bool CSSParser::parseGridTemplateShorthand(bool important)
{
ShorthandScope scope(this, CSSPropertyWebkitGridTemplate);
ASSERT(shorthandForProperty(CSSPropertyWebkitGridTemplate).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(CSSPropertyWebkitGridTemplateColumns, cssValuePool().createIdentifierValue(CSSValueNone), important);
addProperty(CSSPropertyWebkitGridTemplateRows, cssValuePool().createIdentifierValue(CSSValueNone), important);
addProperty(CSSPropertyWebkitGridTemplateAreas, cssValuePool().createIdentifierValue(CSSValueNone), important);
return true;
}
unsigned index = 0;
RefPtr<CSSValue> columnsValue = firstValueIsNone ? cssValuePool().createIdentifierValue(CSSValueNone) : parseGridTrackList();
// 2- <grid-template-columns> / <grid-template-columns> syntax.
if (columnsValue) {
if (!(m_valueList->current() && isForwardSlashOperator(m_valueList->current()) && m_valueList->next()))
return false;
index = m_valueList->currentIndex();
if (RefPtr<CSSValue> rowsValue = parseGridTrackList()) {
if (m_valueList->current())
return false;
addProperty(CSSPropertyWebkitGridTemplateColumns, columnsValue.release(), important);
addProperty(CSSPropertyWebkitGridTemplateRows, rowsValue.release(), important);
addProperty(CSSPropertyWebkitGridTemplateAreas, cssValuePool().createIdentifierValue(CSSValueNone), important);
return true;
}
}
// 3- [<track-list> /]? [<line-names>? <string> [<track-size> <line-names>]? ]+ syntax.
// The template-columns <track-list> can't be 'none'.
if (firstValueIsNone)
return false;
// It requires to rewind parsing due to previous syntax failures.
m_valueList->setCurrentIndex(index);
return parseGridTemplateRowsAndAreas(columnsValue, important);
}
bool CSSParser::parseGridShorthand(bool important)
{
ShorthandScope scope(this, CSSPropertyWebkitGrid);
ASSERT(shorthandForProperty(CSSPropertyWebkitGrid).length() == 6);
// 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(CSSPropertyWebkitGridAutoFlow, cssValuePool().createImplicitInitialValue(), important);
addProperty(CSSPropertyWebkitGridAutoColumns, cssValuePool().createImplicitInitialValue(), important);
addProperty(CSSPropertyWebkitGridAutoRows, 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 (!parseValue(CSSPropertyWebkitGridAutoFlow, important))
return false;
RefPtr<CSSValue> autoColumnsValue;
RefPtr<CSSValue> autoRowsValue;
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(CSSPropertyWebkitGridAutoColumns, autoColumnsValue.release(), important);
addProperty(CSSPropertyWebkitGridAutoRows, autoRowsValue.release(), 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(CSSPropertyWebkitGridTemplateColumns, cssValuePool().createImplicitInitialValue(), important);
addProperty(CSSPropertyWebkitGridTemplateRows, cssValuePool().createImplicitInitialValue(), important);
addProperty(CSSPropertyWebkitGridTemplateAreas, cssValuePool().createImplicitInitialValue(), important);
return true;
}
bool CSSParser::parseGridAreaShorthand(bool important)
{
ShorthandScope scope(this, CSSPropertyWebkitGridArea);
ASSERT(shorthandForProperty(CSSPropertyWebkitGridArea).length() == 4);
RefPtr<CSSValue> rowStartValue = parseGridPosition();
if (!rowStartValue)
return false;
RefPtr<CSSValue> columnStartValue;
if (!parseSingleGridAreaLonghand(columnStartValue))
return false;
RefPtr<CSSValue> rowEndValue;
if (!parseSingleGridAreaLonghand(rowEndValue))
return false;
RefPtr<CSSValue> columnEndValue;
if (!parseSingleGridAreaLonghand(columnEndValue))
return false;
if (!columnStartValue)
columnStartValue = gridMissingGridPositionValue(rowStartValue.get());
if (!rowEndValue)
rowEndValue = gridMissingGridPositionValue(rowStartValue.get());
if (!columnEndValue)
columnEndValue = gridMissingGridPositionValue(columnStartValue.get());
addProperty(CSSPropertyWebkitGridRowStart, rowStartValue, important);
addProperty(CSSPropertyWebkitGridColumnStart, columnStartValue, important);
addProperty(CSSPropertyWebkitGridRowEnd, rowEndValue, important);
addProperty(CSSPropertyWebkitGridColumnEnd, columnEndValue, important);
return true;
}
bool CSSParser::parseSingleGridAreaLonghand(RefPtr<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;
}
bool CSSParser::parseGridLineNames(CSSParserValueList& inputList, CSSValueList& valueList, CSSGridLineNamesValue* previousNamedAreaTrailingLineNames)
{
ASSERT(inputList.current() && inputList.current()->unit == CSSParserValue::ValueList);
CSSParserValueList* identList = inputList.current()->valueList;
if (!identList->size()) {
inputList.next();
return false;
}
// Need to ensure the identList is at the heading index, since the parserList might have been rewound.
identList->setCurrentIndex(0);
RefPtr<CSSGridLineNamesValue> lineNames = previousNamedAreaTrailingLineNames ? previousNamedAreaTrailingLineNames : CSSGridLineNamesValue::create();
while (CSSParserValue* identValue = identList->current()) {
ASSERT(identValue->unit == CSSPrimitiveValue::CSS_IDENT);
lineNames->append(createPrimitiveStringValue(identValue));
identList->next();
}
if (!previousNamedAreaTrailingLineNames)
valueList.append(lineNames.releaseNonNull());
inputList.next();
return true;
}
PassRefPtr<CSSValue> CSSParser::parseGridTrackList()
{
CSSParserValue* value = m_valueList->current();
if (value->id == CSSValueNone) {
m_valueList->next();
return cssValuePool().createIdentifierValue(CSSValueNone);
}
RefPtr<CSSValueList> values = CSSValueList::createSpaceSeparated();
// Handle leading <custom-ident>*.
value = m_valueList->current();
if (value && value->unit == CSSParserValue::ValueList)
parseGridLineNames(*m_valueList, *values);
bool seenTrackSizeOrRepeatFunction = false;
while (CSSParserValue* currentValue = m_valueList->current()) {
if (isForwardSlashOperator(currentValue))
break;
if (currentValue->unit == CSSParserValue::Function && equalIgnoringCase(currentValue->function->name, "repeat(")) {
if (!parseGridTrackRepeatFunction(*values))
return nullptr;
} else {
RefPtr<CSSValue> value = parseGridTrackSize(*m_valueList);
if (!value)
return nullptr;
values->append(value.releaseNonNull());
}
seenTrackSizeOrRepeatFunction = true;
// This will handle the trailing <custom-ident>* in the grammar.
value = m_valueList->current();
if (value && value->unit == CSSParserValue::ValueList)
parseGridLineNames(*m_valueList, *values);
}
if (!seenTrackSizeOrRepeatFunction)
return nullptr;
return values.release();
}
bool CSSParser::parseGridTrackRepeatFunction(CSSValueList& list)
{
CSSParserValueList* arguments = m_valueList->current()->function->args.get();
if (!arguments || arguments->size() < 3 || !validUnit(arguments->valueAt(0), FPositiveInteger) || !isComma(arguments->valueAt(1)))
return false;
ASSERT_WITH_SECURITY_IMPLICATION(arguments->valueAt(0)->fValue > 0);
size_t repetitions = arguments->valueAt(0)->fValue;
// Clamp repetitions at MAX_GRID_TRACK_REPETITIONS.
// http://www.w3.org/TR/css-grid-1/#repeat-notation
if (repetitions > MAX_GRID_TRACK_REPETITIONS)
repetitions = MAX_GRID_TRACK_REPETITIONS;
RefPtr<CSSValueList> repeatedValues = CSSValueList::createSpaceSeparated();
arguments->next(); // Skip the repetition count.
arguments->next(); // Skip the comma.
// Handle leading <custom-ident>*.
CSSParserValue* currentValue = arguments->current();
if (currentValue && currentValue->unit == CSSParserValue::ValueList)
parseGridLineNames(*arguments, *repeatedValues);
bool sawTrackSize = false;
while (arguments->current()) {
RefPtr<CSSValue> trackSize = parseGridTrackSize(*arguments);
if (!trackSize)
return false;
repeatedValues->append(trackSize.releaseNonNull());
sawTrackSize = true;
// This takes care of any trailing <custom-ident>* in the grammar.
currentValue = arguments->current();
if (currentValue && currentValue->unit == CSSParserValue::ValueList)
parseGridLineNames(*arguments, *repeatedValues);
}
// We should have found at least one <track-size>, otherwise the declaration is invalid.
if (!sawTrackSize)
return false;
for (size_t i = 0; i < repetitions; ++i) {
for (size_t j = 0; j < repeatedValues->length(); ++j)
list.append(*repeatedValues->itemWithoutBoundsCheck(j));
}
m_valueList->next();
return true;
}
PassRefPtr<CSSValue> CSSParser::parseGridTrackSize(CSSParserValueList& inputList)
{
CSSParserValue* currentValue = inputList.current();
inputList.next();
if (currentValue->id == CSSValueAuto)
return cssValuePool().createIdentifierValue(CSSValueAuto);
if (currentValue->unit == CSSParserValue::Function && equalIgnoringCase(currentValue->function->name, "minmax(")) {
// 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 0;
RefPtr<CSSPrimitiveValue> minTrackBreadth = parseGridBreadth(arguments->valueAt(0));
if (!minTrackBreadth)
return 0;
RefPtr<CSSPrimitiveValue> maxTrackBreadth = parseGridBreadth(arguments->valueAt(2));
if (!maxTrackBreadth)
return 0;
RefPtr<CSSValueList> parsedArguments = CSSValueList::createCommaSeparated();
parsedArguments->append(minTrackBreadth.releaseNonNull());
parsedArguments->append(maxTrackBreadth.releaseNonNull());
return CSSFunctionValue::create("minmax(", parsedArguments);
}
return parseGridBreadth(currentValue);
}
PassRefPtr<CSSPrimitiveValue> CSSParser::parseGridBreadth(CSSParserValue* currentValue)
{
if (currentValue->id == CSSValueWebkitMinContent || currentValue->id == CSSValueWebkitMaxContent)
return cssValuePool().createIdentifierValue(currentValue->id);
if (currentValue->unit == CSSPrimitiveValue::CSS_FR) {
double flexValue = currentValue->fValue;
// Fractional unit is a non-negative dimension.
if (flexValue <= 0)
return 0;
return cssValuePool().createValue(flexValue, CSSPrimitiveValue::CSS_FR);
}
if (!validUnit(currentValue, FNonNeg | FLength | FPercent))
return 0;
return createPrimitiveNumericValue(currentValue);
}
static inline bool isValidGridAutoFlowId(CSSValueID id)
{
return (id == CSSValueRow || id == CSSValueColumn || id == CSSValueDense || id == CSSValueStack);
}
PassRefPtr<CSSValue> CSSParser::parseGridAutoFlow(CSSParserValueList& inputList)
{
// [ row | column ] && dense? | stack && [ row | column ]?
CSSParserValue* value = inputList.current();
if (!value)
return nullptr;
RefPtr<CSSValueList> parsedValues = CSSValueList::createSpaceSeparated();
// First parameter.
CSSValueID firstId = value->id;
if (!isValidGridAutoFlowId(firstId))
return nullptr;
// Second parameter, if any.
// If second parameter is not valid we should process anyway the first one as we can be inside the "grid" shorthand.
value = inputList.next();
if (!value || !isValidGridAutoFlowId(value->id)) {
if (firstId == CSSValueDense)
return nullptr;
if (firstId == CSSValueStack)
parsedValues->append(cssValuePool().createIdentifierValue(CSSValueRow));
parsedValues->append(cssValuePool().createIdentifierValue(firstId));
return parsedValues;
}
switch (firstId) {
case CSSValueRow:
case CSSValueColumn:
parsedValues->append(cssValuePool().createIdentifierValue(firstId));
if (value->id == CSSValueDense || value->id == CSSValueStack) {
parsedValues->append(cssValuePool().createIdentifierValue(value->id));
inputList.next();
}
break;
case CSSValueDense:
case CSSValueStack:
if (value->id == CSSValueRow || value->id == CSSValueColumn) {
parsedValues->append(cssValuePool().createIdentifierValue(value->id));
inputList.next();
}
parsedValues->append(cssValuePool().createIdentifierValue(firstId));
break;
default:
ASSERT_NOT_REACHED();
break;
}
return parsedValues;
}
#endif /* ENABLE(CSS_GRID_LAYOUT) */
#if ENABLE(DASHBOARD_SUPPORT)
#define DASHBOARD_REGION_NUM_PARAMETERS 6
#define DASHBOARD_REGION_SHORT_NUM_PARAMETERS 2
static CSSParserValue* skipCommaInDashboardRegion(CSSParserValueList *args)
{
if (args->size() == (DASHBOARD_REGION_NUM_PARAMETERS*2-1) ||
args->size() == (DASHBOARD_REGION_SHORT_NUM_PARAMETERS*2-1)) {
CSSParserValue* current = args->current();
if (current->unit == CSSParserValue::Operator && current->iValue == ',')
return args->next();
}
return args->current();
}
bool CSSParser::parseDashboardRegions(CSSPropertyID propId, bool important)
{
bool valid = true;
CSSParserValue* value = m_valueList->current();
if (value->id == CSSValueNone) {
if (m_valueList->next())
return false;
addProperty(propId, cssValuePool().createIdentifierValue(value->id), important);
return valid;
}
RefPtr<DashboardRegion> firstRegion = DashboardRegion::create();
DashboardRegion* region = 0;
while (value) {
if (region == 0) {
region = firstRegion.get();
} else {
RefPtr<DashboardRegion> nextRegion = DashboardRegion::create();
region->m_next = nextRegion;
region = nextRegion.get();
}
if (value->unit != CSSParserValue::Function) {
valid = false;
break;
}
// Commas count as values, so allow (function name is dashboard-region for DASHBOARD_SUPPORT feature):
// dashboard-region(label, type, t, r, b, l) or dashboard-region(label type t r b l)
// dashboard-region(label, type, t, r, b, l) or dashboard-region(label type t r b l)
// also allow
// dashboard-region(label, type) or dashboard-region(label type)
// dashboard-region(label, type) or dashboard-region(label type)
CSSParserValueList* args = value->function->args.get();
if (!equalIgnoringCase(value->function->name, "dashboard-region(") || !args) {
valid = false;
break;
}
int numArgs = args->size();
if ((numArgs != DASHBOARD_REGION_NUM_PARAMETERS && numArgs != (DASHBOARD_REGION_NUM_PARAMETERS*2-1)) &&
(numArgs != DASHBOARD_REGION_SHORT_NUM_PARAMETERS && numArgs != (DASHBOARD_REGION_SHORT_NUM_PARAMETERS*2-1))) {
valid = false;
break;
}
// First arg is a label.
CSSParserValue* arg = args->current();
if (arg->unit != CSSPrimitiveValue::CSS_IDENT) {
valid = false;
break;
}
region->m_label = arg->string;
// Second arg is a type.
arg = args->next();
arg = skipCommaInDashboardRegion(args);
if (arg->unit != CSSPrimitiveValue::CSS_IDENT) {
valid = false;
break;
}
if (equalIgnoringCase(arg, "circle"))
region->m_isCircle = true;
else if (equalIgnoringCase(arg, "rectangle"))
region->m_isRectangle = true;
else {
valid = false;
break;
}
region->m_geometryType = arg->string;
if (numArgs == DASHBOARD_REGION_SHORT_NUM_PARAMETERS || numArgs == (DASHBOARD_REGION_SHORT_NUM_PARAMETERS*2-1)) {
// This originally used CSSValueInvalid by accident. It might be more logical to use something else.
RefPtr<CSSPrimitiveValue> amount = cssValuePool().createIdentifierValue(CSSValueInvalid);
region->setTop(amount);
region->setRight(amount);
region->setBottom(amount);
region->setLeft(amount);
} else {
// Next four arguments must be offset numbers
int i;
for (i = 0; i < 4; i++) {
arg = args->next();
arg = skipCommaInDashboardRegion(args);
valid = arg->id == CSSValueAuto || validUnit(arg, FLength);
if (!valid)
break;
RefPtr<CSSPrimitiveValue> amount = arg->id == CSSValueAuto ?
cssValuePool().createIdentifierValue(CSSValueAuto) :
createPrimitiveNumericValue(arg);
if (i == 0)
region->setTop(amount);
else if (i == 1)
region->setRight(amount);
else if (i == 2)
region->setBottom(amount);
else
region->setLeft(amount);
}
}
if (args->next())
return false;
value = m_valueList->next();
}
if (valid)
addProperty(propId, cssValuePool().createValue(firstRegion.release()), important);
return valid;
}
#endif /* ENABLE(DASHBOARD_SUPPORT) */
#if ENABLE(CSS_GRID_LAYOUT)
bool CSSParser::parseGridTemplateAreasRow(NamedGridAreaMap& gridAreaMap, const unsigned rowCount, unsigned& columnCount)
{
CSSParserValue* currentValue = m_valueList->current();
if (!currentValue || currentValue->unit != CSSPrimitiveValue::CSS_STRING)
return false;
String gridRowNames = currentValue->string;
if (gridRowNames.containsOnlyWhitespace())
return false;
Vector<String> columnNames;
gridRowNames.split(' ', columnNames);
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 (unsigned currentColumn = 0; currentColumn < columnCount; ++currentColumn) {
const String& gridAreaName = columnNames[currentColumn];
// 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.
unsigned lookAheadColumn;
for (lookAheadColumn = currentColumn; lookAheadColumn < columnCount - 1; ++lookAheadColumn) {
if (columnNames[lookAheadColumn + 1] != gridAreaName)
break;
}
auto gridAreaIterator = gridAreaMap.find(gridAreaName);
if (gridAreaIterator == gridAreaMap.end())
gridAreaMap.add(gridAreaName, GridCoordinate(GridSpan(rowCount, rowCount), GridSpan(currentColumn, lookAheadColumn)));
else {
GridCoordinate& gridCoordinate = gridAreaIterator->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 != gridCoordinate.rows.resolvedFinalPosition.next().toInt())
return 0;
// 2. The new area starts at the same position as the previously parsed area.
if (currentColumn != gridCoordinate.columns.resolvedInitialPosition.toInt())
return 0;
// 3. The new area ends at the same position as the previously parsed area.
if (lookAheadColumn != gridCoordinate.columns.resolvedFinalPosition.toInt())
return 0;
++gridCoordinate.rows.resolvedFinalPosition;
}
currentColumn = lookAheadColumn;
}
m_valueList->next();
return true;
}
PassRefPtr<CSSValue> CSSParser::parseGridTemplateAreas()
{
NamedGridAreaMap gridAreaMap;
unsigned rowCount = 0;
unsigned columnCount = 0;
while (m_valueList->current()) {
if (!parseGridTemplateAreasRow(gridAreaMap, rowCount, columnCount))
return 0;
++rowCount;
}
if (!rowCount || !columnCount)
return 0;
return CSSGridTemplateAreasValue::create(gridAreaMap, rowCount, columnCount);
}
#endif /* ENABLE(CSS_GRID_LAYOUT) */
PassRefPtr<CSSValue> CSSParser::parseCounterContent(CSSParserValueList* args, bool counters)
{
unsigned numArgs = args->size();
if (counters && numArgs != 3 && numArgs != 5)
return 0;
if (!counters && numArgs != 1 && numArgs != 3)
return 0;
CSSParserValue* i = args->current();
if (i->unit != CSSPrimitiveValue::CSS_IDENT)
return 0;
RefPtr<CSSPrimitiveValue> identifier = createPrimitiveStringValue(i);
RefPtr<CSSPrimitiveValue> separator;
if (!counters)
separator = cssValuePool().createValue(String(), CSSPrimitiveValue::CSS_STRING);
else {
i = args->next();
if (i->unit != CSSParserValue::Operator || i->iValue != ',')
return 0;
i = args->next();
if (i->unit != CSSPrimitiveValue::CSS_STRING)
return 0;
separator = createPrimitiveStringValue(i);
}
RefPtr<CSSPrimitiveValue> listStyle;
i = args->next();
if (!i) // Make the list style default decimal
listStyle = cssValuePool().createIdentifierValue(CSSValueDecimal);
else {
if (i->unit != CSSParserValue::Operator || i->iValue != ',')
return 0;
i = args->next();
if (i->unit != CSSPrimitiveValue::CSS_IDENT)
return 0;
CSSValueID listStyleID = CSSValueInvalid;
if (i->id == CSSValueNone || (i->id >= CSSValueDisc && i->id <= CSSValueKatakanaIroha))
listStyleID = i->id;
else
return 0;
listStyle = cssValuePool().createIdentifierValue(listStyleID);
}
return cssValuePool().createValue(Counter::create(identifier.release(), listStyle.release(), separator.release()));
}
bool CSSParser::parseClipShape(CSSPropertyID propId, bool important)
{
CSSParserValue* value = m_valueList->current();
CSSParserValueList* args = value->function->args.get();
if (!equalIgnoringCase(value->function->name, "rect(") || !args)
return false;
// rect(t, r, b, l) || rect(t r b l)
if (args->size() != 4 && args->size() != 7)
return false;
RefPtr<Rect> rect = Rect::create();
bool valid = true;
int i = 0;
CSSParserValue* a = args->current();
while (a) {
valid = a->id == CSSValueAuto || validUnit(a, FLength);
if (!valid)
break;
RefPtr<CSSPrimitiveValue> length = a->id == CSSValueAuto ?
cssValuePool().createIdentifierValue(CSSValueAuto) :
createPrimitiveNumericValue(a);
if (i == 0)
rect->setTop(length);
else if (i == 1)
rect->setRight(length);
else if (i == 2)
rect->setBottom(length);
else
rect->setLeft(length);
a = args->next();
if (a && args->size() == 7) {
if (a->unit == CSSParserValue::Operator && a->iValue == ',') {
a = args->next();
} else {
valid = false;
break;
}
}
i++;
}
if (valid) {
addProperty(propId, cssValuePool().createValue(rect.release()), important);
m_valueList->next();
return true;
}
return false;
}
static void completeBorderRadii(RefPtr<CSSPrimitiveValue> radii[4])
{
if (radii[3])
return;
if (!radii[2]) {
if (!radii[1])
radii[1] = radii[0];
radii[2] = radii[0];
}
radii[3] = radii[1];
}
// FIXME: This should be refactored with CSSParser::parseBorderRadius.
// CSSParser::parseBorderRadius contains support for some legacy radius construction.
PassRefPtr<CSSBasicShape> CSSParser::parseInsetRoundedCorners(PassRefPtr<CSSBasicShapeInset> shape, CSSParserValueList* args)
{
CSSParserValue* argument = args->next();
if (!argument)
return nullptr;
Vector<CSSParserValue*> radiusArguments;
while (argument) {
radiusArguments.append(argument);
argument = args->next();
}
unsigned num = radiusArguments.size();
if (!num || num > 9)
return nullptr;
RefPtr<CSSPrimitiveValue> radii[2][4];
unsigned indexAfterSlash = 0;
for (unsigned i = 0; i < num; ++i) {
CSSParserValue* value = radiusArguments.at(i);
if (value->unit == CSSParserValue::Operator) {
if (value->iValue != '/')
return nullptr;
if (!i || indexAfterSlash || i + 1 == num || num > i + 5)
return nullptr;
indexAfterSlash = i + 1;
completeBorderRadii(radii[0]);
continue;
}
if (i - indexAfterSlash >= 4)
return nullptr;
if (!validUnit(value, FLength | FPercent | FNonNeg))
return nullptr;
RefPtr<CSSPrimitiveValue> radius = createPrimitiveNumericValue(value);
if (!indexAfterSlash)
radii[0][i] = radius;
else
radii[1][i - indexAfterSlash] = radius.release();
}
if (!indexAfterSlash) {
completeBorderRadii(radii[0]);
for (unsigned i = 0; i < 4; ++i)
radii[1][i] = radii[0][i];
} else
completeBorderRadii(radii[1]);
shape->setTopLeftRadius(createPrimitiveValuePair(radii[0][0].release(), radii[1][0].release()));
shape->setTopRightRadius(createPrimitiveValuePair(radii[0][1].release(), radii[1][1].release()));
shape->setBottomRightRadius(createPrimitiveValuePair(radii[0][2].release(), radii[1][2].release()));
shape->setBottomLeftRadius(createPrimitiveValuePair(radii[0][3].release(), radii[1][3].release()));
return shape;
}
PassRefPtr<CSSBasicShape> CSSParser::parseBasicShapeInset(CSSParserValueList* args)
{
ASSERT(args);
RefPtr<CSSBasicShapeInset> shape = CSSBasicShapeInset::create();
CSSParserValue* argument = args->current();
Vector<RefPtr<CSSPrimitiveValue> > widthArguments;
bool hasRoundedInset = false;
while (argument) {
if (argument->unit == CSSPrimitiveValue::CSS_IDENT && equalIgnoringCase(argument->string, "round")) {
hasRoundedInset = true;
break;
}
Units unitFlags = FLength | FPercent;
if (!validUnit(argument, unitFlags) || widthArguments.size() > 4)
return nullptr;
widthArguments.append(createPrimitiveNumericValue(argument));
argument = args->next();
}
switch (widthArguments.size()) {
case 1: {
shape->updateShapeSize1Value(widthArguments[0].get());
break;
}
case 2: {
shape->updateShapeSize2Values(widthArguments[0].get(), widthArguments[1].get());
break;
}
case 3: {
shape->updateShapeSize3Values(widthArguments[0].get(), widthArguments[1].get(), widthArguments[2].get());
break;
}
case 4: {
shape->updateShapeSize4Values(widthArguments[0].get(), widthArguments[1].get(), widthArguments[2].get(), widthArguments[3].get());
break;
}
default:
return nullptr;
}
if (hasRoundedInset)
return parseInsetRoundedCorners(shape, args);
return shape;
}
PassRefPtr<CSSPrimitiveValue> CSSParser::parseShapeRadius(CSSParserValue* value)
{
if (value->id == CSSValueClosestSide || value->id == CSSValueFarthestSide)
return cssValuePool().createIdentifierValue(value->id);
if (!validUnit(value, FLength | FPercent | FNonNeg))
return 0;
return createPrimitiveNumericValue(value);
}
PassRefPtr<CSSBasicShape> CSSParser::parseBasicShapeCircle(CSSParserValueList* args)
{
ASSERT(args);
// circle(radius)
// circle(radius at <position>)
// circle(at <position>)
// where position defines centerX and centerY using a CSS <position> data type.
RefPtr<CSSBasicShapeCircle> shape = CSSBasicShapeCircle::create();
for (CSSParserValue* argument = args->current(); argument; argument = args->next()) {
// The call to parseFillPosition below should consume all of the
// arguments except the first two. Thus, and index greater than one
// indicates an invalid production.
if (args->currentIndex() > 1)
return nullptr;
if (!args->currentIndex() && argument->id != CSSValueAt) {
if (RefPtr<CSSPrimitiveValue> radius = parseShapeRadius(argument)) {
shape->setRadius(radius);
continue;
}
return nullptr;
}
if (argument->id == CSSValueAt && args->next()) {
RefPtr<CSSValue> centerX;
RefPtr<CSSValue> centerY;
parseFillPosition(args, centerX, centerY);
if (centerX && centerY && !args->current()) {
shape->setCenterX(downcast<CSSPrimitiveValue>(centerX.get()));
shape->setCenterY(downcast<CSSPrimitiveValue>(centerY.get()));
} else
return nullptr;
} else
return nullptr;
}
return shape;
}
PassRefPtr<CSSBasicShape> CSSParser::parseBasicShapeEllipse(CSSParserValueList* args)
{
ASSERT(args);
// ellipse(radiusX)
// ellipse(radiusX at <position>)
// ellipse(radiusX radiusY)
// ellipse(radiusX radiusY at <position>)
// ellipse(at <position>)
// where position defines centerX and centerY using a CSS <position> data type.
RefPtr<CSSBasicShapeEllipse> shape = CSSBasicShapeEllipse::create();
for (CSSParserValue* argument = args->current(); argument; argument = args->next()) {
// The call to parseFillPosition below should consume all of the
// arguments except the first three. Thus, an index greater than two
// indicates an invalid production.
if (args->currentIndex() > 2)
return nullptr;
if (args->currentIndex() < 2 && argument->id != CSSValueAt) {
if (RefPtr<CSSPrimitiveValue> radius = parseShapeRadius(argument)) {
if (!shape->radiusX())
shape->setRadiusX(radius);
else
shape->setRadiusY(radius);
continue;
}
return nullptr;
}
if (argument->id != CSSValueAt || !args->next()) // expecting ellipse(.. at <position>)
return nullptr;
RefPtr<CSSValue> centerX;
RefPtr<CSSValue> centerY;
parseFillPosition(args, centerX, centerY);
if (!centerX || !centerY || args->current())
return nullptr;
shape->setCenterX(downcast<CSSPrimitiveValue>(centerX.get()));
shape->setCenterY(downcast<CSSPrimitiveValue>(centerY.get()));
}
return shape;
}
PassRefPtr<CSSBasicShape> CSSParser::parseBasicShapePolygon(CSSParserValueList* args)
{
ASSERT(args);
unsigned size = args->size();
if (!size)
return 0;
RefPtr<CSSBasicShapePolygon> shape = CSSBasicShapePolygon::create();
CSSParserValue* argument = args->current();
if (argument->id == CSSValueEvenodd || argument->id == CSSValueNonzero) {
shape->setWindRule(argument->id == CSSValueEvenodd ? RULE_EVENODD : RULE_NONZERO);
if (!isComma(args->next()))
return 0;
argument = args->next();
size -= 2;
}
// <length> <length>, ... <length> <length> -> each pair has 3 elements except the last one
if (!size || (size % 3) - 2)
return 0;
CSSParserValue* argumentX = argument;
while (argumentX) {
if (!validUnit(argumentX, FLength | FPercent))
return 0;
RefPtr<CSSPrimitiveValue> xLength = createPrimitiveNumericValue(argumentX);
CSSParserValue* argumentY = args->next();
if (!argumentY || !validUnit(argumentY, FLength | FPercent))
return 0;
RefPtr<CSSPrimitiveValue> yLength = createPrimitiveNumericValue(argumentY);
shape->appendPoint(xLength.release(), yLength.release());
CSSParserValue* commaOrNull = args->next();
if (!commaOrNull)
argumentX = 0;
else if (!isComma(commaOrNull))
return 0;
else
argumentX = args->next();
}
return shape;
}
static bool isBoxValue(CSSValueID valueId, CSSPropertyID propId)
{
switch (valueId) {
case CSSValueContentBox:
case CSSValuePaddingBox:
case CSSValueBorderBox:
case CSSValueMarginBox:
return true;
case CSSValueFill:
case CSSValueStroke:
case CSSValueViewBox:
return propId == CSSPropertyWebkitClipPath;
default: break;
}
return false;
}
PassRefPtr<CSSValue> CSSParser::parseBasicShapeAndOrBox(CSSPropertyID propId)
{
CSSParserValue* value = m_valueList->current();
bool shapeFound = false;
bool boxFound = false;
CSSValueID valueId;
RefPtr<CSSValueList> list = CSSValueList::createSpaceSeparated();
for (unsigned i = 0; i < 2; ++i) {
if (!value)
break;
valueId = value->id;
if (value->unit == CSSParserValue::Function && !shapeFound) {
// parseBasicShape already asks for the next value list item.
RefPtr<CSSPrimitiveValue> shapeValue = parseBasicShape();
if (!shapeValue)
return nullptr;
list->append(shapeValue.releaseNonNull());
shapeFound = true;
} else if (isBoxValue(valueId, propId) && !boxFound) {
RefPtr<CSSPrimitiveValue> parsedValue = parseValidPrimitive(valueId, value);
list->append(parsedValue.releaseNonNull());
boxFound = true;
m_valueList->next();
} else
return nullptr;
value = m_valueList->current();
}
if (m_valueList->current())
return nullptr;
return list.release();
}
#if ENABLE(CSS_SHAPES)
PassRefPtr<CSSValue> CSSParser::parseShapeProperty(CSSPropertyID propId)
{
if (!RuntimeEnabledFeatures::sharedFeatures().cssShapesEnabled())
return nullptr;
CSSParserValue* value = m_valueList->current();
CSSValueID valueId = value->id;
RefPtr<CSSPrimitiveValue> keywordValue;
RefPtr<CSSPrimitiveValue> shapeValue;
if (valueId == CSSValueNone) {
keywordValue = parseValidPrimitive(valueId, value);
m_valueList->next();
return keywordValue.release();
}
RefPtr<CSSValue> imageValue;
if (valueId != CSSValueNone && parseFillImage(m_valueList.get(), imageValue)) {
m_valueList->next();
return imageValue.release();
}
return parseBasicShapeAndOrBox(propId);
}
#endif
PassRefPtr<CSSValue> CSSParser::parseClipPath()
{
CSSParserValue* value = m_valueList->current();
CSSValueID valueId = value->id;
if (valueId == CSSValueNone) {
m_valueList->next();
return parseValidPrimitive(valueId, value);
}
if (value->unit == CSSPrimitiveValue::CSS_URI) {
m_valueList->next();
return CSSPrimitiveValue::create(value->string, CSSPrimitiveValue::CSS_URI);
}
return parseBasicShapeAndOrBox(CSSPropertyWebkitClipPath);
}
PassRefPtr<CSSPrimitiveValue> CSSParser::parseBasicShape()
{
CSSParserValue* value = m_valueList->current();
ASSERT(value->unit == CSSParserValue::Function);
CSSParserValueList* args = value->function->args.get();
if (!args)
return nullptr;
RefPtr<CSSBasicShape> shape;
if (equalIgnoringCase(value->function->name, "circle("))
shape = parseBasicShapeCircle(args);
else if (equalIgnoringCase(value->function->name, "ellipse("))
shape = parseBasicShapeEllipse(args);
else if (equalIgnoringCase(value->function->name, "polygon("))
shape = parseBasicShapePolygon(args);
else if (equalIgnoringCase(value->function->name, "inset("))
shape = parseBasicShapeInset(args);
if (!shape)
return nullptr;
m_valueList->next();
return cssValuePool().createValue(shape.release());
}
// [ 'font-style' || 'font-variant' || 'font-weight' ]? 'font-size' [ / 'line-height' ]? 'font-family'
bool CSSParser::parseFont(bool important)
{
// Let's check if there is an inherit or initial somewhere in the shorthand.
for (unsigned i = 0; i < m_valueList->size(); ++i) {
if (m_valueList->valueAt(i)->id == CSSValueInherit || m_valueList->valueAt(i)->id == CSSValueInitial)
return false;
}
ShorthandScope scope(this, CSSPropertyFont);
// Optional font-style, font-variant and font-weight.
bool fontStyleParsed = false;
bool fontVariantParsed = false;
bool fontWeightParsed = false;
CSSParserValue* value;
while ((value = m_valueList->current())) {
if (!fontStyleParsed && isValidKeywordPropertyAndValue(CSSPropertyFontStyle, value->id, m_context)) {
addProperty(CSSPropertyFontStyle, cssValuePool().createIdentifierValue(value->id), important);
fontStyleParsed = true;
} else if (!fontVariantParsed && (value->id == CSSValueNormal || value->id == CSSValueSmallCaps)) {
// Font variant in the shorthand is particular, it only accepts normal or small-caps.
addProperty(CSSPropertyFontVariant, cssValuePool().createIdentifierValue(value->id), important);
fontVariantParsed = true;
} else if (!fontWeightParsed && parseFontWeight(important))
fontWeightParsed = true;
else
break;
m_valueList->next();
}
if (!value)
return false;
if (!fontStyleParsed)
addProperty(CSSPropertyFontStyle, cssValuePool().createIdentifierValue(CSSValueNormal), important, true);
if (!fontVariantParsed)
addProperty(CSSPropertyFontVariant, cssValuePool().createIdentifierValue(CSSValueNormal), important, true);
if (!fontWeightParsed)
addProperty(CSSPropertyFontWeight, cssValuePool().createIdentifierValue(CSSValueNormal), important, true);
// Now a font size _must_ come.
// <absolute-size> | <relative-size> | <length> | <percentage> | inherit
if (!parseFontSize(important))
return false;
value = m_valueList->current();
if (!value)
return false;
if (isForwardSlashOperator(value)) {
// The line-height property.
value = m_valueList->next();
if (!value)
return false;
if (!parseLineHeight(important))
return false;
} else
addProperty(CSSPropertyLineHeight, cssValuePool().createIdentifierValue(CSSValueNormal), important, true);
// Font family must come now.
RefPtr<CSSValue> parsedFamilyValue = parseFontFamily();
if (!parsedFamilyValue)
return false;
addProperty(CSSPropertyFontFamily, parsedFamilyValue.release(), important);
// FIXME: http://www.w3.org/TR/2011/WD-css3-fonts-20110324/#font-prop requires that
// "font-stretch", "font-size-adjust", and "font-kerning" be reset to their initial values
// but we don't seem to support them at the moment. They should also be added here once implemented.
if (m_valueList->current())
return false;
return true;
}
class FontFamilyValueBuilder {
public:
FontFamilyValueBuilder(CSSValueList* list)
: m_list(list)
{
}
void add(const CSSParserString& string)
{
if (!m_builder.isEmpty())
m_builder.append(' ');
if (string.is8Bit()) {
m_builder.append(string.characters8(), string.length());
return;
}
m_builder.append(string.characters16(), string.length());
}
void commit()
{
if (m_builder.isEmpty())
return;
m_list->append(cssValuePool().createFontFamilyValue(m_builder.toString()));
m_builder.clear();
}
private:
StringBuilder m_builder;
CSSValueList* m_list;
};
PassRefPtr<CSSValueList> CSSParser::parseFontFamily()
{
RefPtr<CSSValueList> list = CSSValueList::createCommaSeparated();
CSSParserValue* value = m_valueList->current();
FontFamilyValueBuilder familyBuilder(list.get());
bool inFamily = false;
while (value) {
CSSParserValue* nextValue = m_valueList->next();
bool nextValBreaksFont = !nextValue ||
(nextValue->unit == CSSParserValue::Operator && nextValue->iValue == ',');
bool nextValIsFontName = nextValue &&
((nextValue->id >= CSSValueSerif && nextValue->id <= CSSValueWebkitBody) ||
(nextValue->unit == CSSPrimitiveValue::CSS_STRING || nextValue->unit == CSSPrimitiveValue::CSS_IDENT));
bool valueIsKeyword = value->id == CSSValueInitial || value->id == CSSValueInherit || value->id == CSSValueDefault;
if (valueIsKeyword && !inFamily) {
if (nextValBreaksFont)
value = m_valueList->next();
else if (nextValIsFontName)
value = nextValue;
continue;
}
if (value->id >= CSSValueSerif && value->id <= CSSValueWebkitBody) {
if (inFamily)
familyBuilder.add(value->string);
else if (nextValBreaksFont || !nextValIsFontName)
list->append(cssValuePool().createIdentifierValue(value->id));
else {
familyBuilder.commit();
familyBuilder.add(value->string);
inFamily = true;
}
} else if (value->unit == CSSPrimitiveValue::CSS_STRING) {
// Strings never share in a family name.
inFamily = false;
familyBuilder.commit();
list->append(cssValuePool().createFontFamilyValue(value->string));
} else if (value->unit == CSSPrimitiveValue::CSS_IDENT) {
if (inFamily)
familyBuilder.add(value->string);
else if (nextValBreaksFont || !nextValIsFontName)
list->append(cssValuePool().createFontFamilyValue(value->string));
else {
familyBuilder.commit();
familyBuilder.add(value->string);
inFamily = true;
}
} else {
break;
}
if (!nextValue)
break;
if (nextValBreaksFont) {
value = m_valueList->next();
familyBuilder.commit();
inFamily = false;
}
else if (nextValIsFontName)
value = nextValue;
else
break;
}
familyBuilder.commit();
if (!list->length())
list = 0;
return list.release();
}
bool CSSParser::parseLineHeight(bool important)
{
CSSParserValue* value = m_valueList->current();
CSSValueID id = value->id;
bool validPrimitive = false;
// normal | <number> | <length> | <percentage> | inherit
if (id == CSSValueNormal)
validPrimitive = true;
else
validPrimitive = (!id && validUnit(value, FNumber | FLength | FPercent | FNonNeg));
if (validPrimitive && (!m_valueList->next() || inShorthand()))
addProperty(CSSPropertyLineHeight, parseValidPrimitive(id, value), important);
return validPrimitive;
}
bool CSSParser::parseFontSize(bool important)
{
CSSParserValue* value = m_valueList->current();
CSSValueID id = value->id;
bool validPrimitive = false;
// <absolute-size> | <relative-size> | <length> | <percentage> | inherit
if (id >= CSSValueXxSmall && id <= CSSValueLarger)
validPrimitive = true;
else
validPrimitive = validUnit(value, FLength | FPercent | FNonNeg);
if (validPrimitive && (!m_valueList->next() || inShorthand()))
addProperty(CSSPropertyFontSize, parseValidPrimitive(id, value), important);
return validPrimitive;
}
bool CSSParser::parseFontVariant(bool important)
{
RefPtr<CSSValueList> values;
if (m_valueList->size() > 1)
values = CSSValueList::createCommaSeparated();
CSSParserValue* val;
bool expectComma = false;
while ((val = m_valueList->current())) {
RefPtr<CSSPrimitiveValue> parsedValue;
if (!expectComma) {
expectComma = true;
if (val->id == CSSValueNormal || val->id == CSSValueSmallCaps)
parsedValue = cssValuePool().createIdentifierValue(val->id);
else if (val->id == CSSValueAll && !values) {
// 'all' is only allowed in @font-face and with no other values. Make a value list to
// indicate that we are in the @font-face case.
values = CSSValueList::createCommaSeparated();
parsedValue = cssValuePool().createIdentifierValue(val->id);
}
} else if (val->unit == CSSParserValue::Operator && val->iValue == ',') {
expectComma = false;
m_valueList->next();
continue;
}
if (!parsedValue)
return false;
m_valueList->next();
if (values)
values->append(parsedValue.releaseNonNull());
else {
addProperty(CSSPropertyFontVariant, parsedValue.release(), important);
return true;
}
}
if (values && values->length()) {
m_hasFontFaceOnlyValues = true;
addProperty(CSSPropertyFontVariant, values.release(), important);
return true;
}
return false;
}
static CSSValueID createFontWeightValueKeyword(int weight)
{
ASSERT(!(weight % 100) && weight >= 100 && weight <= 900);
CSSValueID value = static_cast<CSSValueID>(CSSValue100 + weight / 100 - 1);
ASSERT(value >= CSSValue100 && value <= CSSValue900);
return value;
}
bool CSSParser::parseFontWeight(bool important)
{
CSSParserValue* value = m_valueList->current();
if ((value->id >= CSSValueNormal) && (value->id <= CSSValue900)) {
addProperty(CSSPropertyFontWeight, cssValuePool().createIdentifierValue(value->id), important);
return true;
}
if (validUnit(value, FInteger | FNonNeg, CSSQuirksMode)) {
int weight = static_cast<int>(value->fValue);
if (!(weight % 100) && weight >= 100 && weight <= 900) {
addProperty(CSSPropertyFontWeight, cssValuePool().createIdentifierValue(createFontWeightValueKeyword(weight)), important);
return true;
}
}
return false;
}
bool CSSParser::parseFontFaceSrcURI(CSSValueList* valueList)
{
RefPtr<CSSFontFaceSrcValue> uriValue(CSSFontFaceSrcValue::create(completeURL(m_valueList->current()->string)));
CSSParserValue* value = m_valueList->next();
if (!value) {
valueList->append(uriValue.releaseNonNull());
return true;
}
if (value->unit == CSSParserValue::Operator && value->iValue == ',') {
m_valueList->next();
valueList->append(uriValue.releaseNonNull());
return true;
}
if (value->unit != CSSParserValue::Function || !equalIgnoringCase(value->function->name, "format("))
return false;
// FIXME: http://www.w3.org/TR/2011/WD-css3-fonts-20111004/ says that format() contains a comma-separated list of strings,
// but CSSFontFaceSrcValue stores only one format. Allowing one format for now.
CSSParserValueList* args = value->function->args.get();
if (!args || args->size() != 1 || (args->current()->unit != CSSPrimitiveValue::CSS_STRING && args->current()->unit != CSSPrimitiveValue::CSS_IDENT))
return false;
uriValue->setFormat(args->current()->string);
valueList->append(uriValue.releaseNonNull());
value = m_valueList->next();
if (value && value->unit == CSSParserValue::Operator && value->iValue == ',')
m_valueList->next();
return true;
}
bool CSSParser::parseFontFaceSrcLocal(CSSValueList* valueList)
{
CSSParserValueList* args = m_valueList->current()->function->args.get();
if (!args || !args->size())
return false;
if (args->size() == 1 && args->current()->unit == CSSPrimitiveValue::CSS_STRING)
valueList->append(CSSFontFaceSrcValue::createLocal(args->current()->string));
else if (args->current()->unit == CSSPrimitiveValue::CSS_IDENT) {
StringBuilder builder;
for (CSSParserValue* localValue = args->current(); localValue; localValue = args->next()) {
if (localValue->unit != CSSPrimitiveValue::CSS_IDENT)
return false;
if (!builder.isEmpty())
builder.append(' ');
builder.append(localValue->string);
}
valueList->append(CSSFontFaceSrcValue::createLocal(builder.toString()));
} else
return false;
if (CSSParserValue* value = m_valueList->next()) {
if (value->unit == CSSParserValue::Operator && value->iValue == ',')
m_valueList->next();
}
return true;
}
bool CSSParser::parseFontFaceSrc()
{
RefPtr<CSSValueList> values(CSSValueList::createCommaSeparated());
while (CSSParserValue* value = m_valueList->current()) {
if (value->unit == CSSPrimitiveValue::CSS_URI) {
if (!parseFontFaceSrcURI(values.get()))
return false;
} else if (value->unit == CSSParserValue::Function && equalIgnoringCase(value->function->name, "local(")) {
if (!parseFontFaceSrcLocal(values.get()))
return false;
} else
return false;
}
if (!values->length())
return false;
addProperty(CSSPropertySrc, values.release(), m_important);
m_valueList->next();
return true;
}
bool CSSParser::parseFontFaceUnicodeRange()
{
RefPtr<CSSValueList> values = CSSValueList::createCommaSeparated();
bool failed = false;
bool operatorExpected = false;
for (; m_valueList->current(); m_valueList->next(), operatorExpected = !operatorExpected) {
if (operatorExpected) {
if (m_valueList->current()->unit == CSSParserValue::Operator && m_valueList->current()->iValue == ',')
continue;
failed = true;
break;
}
if (m_valueList->current()->unit != CSSPrimitiveValue::CSS_UNICODE_RANGE) {
failed = true;
break;
}
String rangeString = m_valueList->current()->string;
UChar32 from = 0;
UChar32 to = 0;
unsigned length = rangeString.length();
if (length < 3) {
failed = true;
break;
}
unsigned i = 2;
while (i < length) {
UChar c = rangeString[i];
if (c == '-' || c == '?')
break;
from *= 16;
if (c >= '0' && c <= '9')
from += c - '0';
else if (c >= 'A' && c <= 'F')
from += 10 + c - 'A';
else if (c >= 'a' && c <= 'f')
from += 10 + c - 'a';
else {
failed = true;
break;
}
i++;
}
if (failed)
break;
if (i == length)
to = from;
else if (rangeString[i] == '?') {
unsigned span = 1;
while (i < length && rangeString[i] == '?') {
span *= 16;
from *= 16;
i++;
}
if (i < length)
failed = true;
to = from + span - 1;
} else {
if (length < i + 2) {
failed = true;
break;
}
i++;
while (i < length) {
UChar c = rangeString[i];
to *= 16;
if (c >= '0' && c <= '9')
to += c - '0';
else if (c >= 'A' && c <= 'F')
to += 10 + c - 'A';
else if (c >= 'a' && c <= 'f')
to += 10 + c - 'a';
else {
failed = true;
break;
}
i++;
}
if (failed)
break;
}
if (from <= to)
values->append(CSSUnicodeRangeValue::create(from, to));
}
if (failed || !values->length())
return false;
addProperty(CSSPropertyUnicodeRange, values.release(), m_important);
return true;
}
// Returns the number of characters which form a valid double
// and are terminated by the given terminator character
template <typename CharacterType>
static int checkForValidDouble(const CharacterType* string, const CharacterType* end, const char terminator)
{
int length = end - string;
if (length < 1)
return 0;
bool decimalMarkSeen = false;
int processedLength = 0;
for (int i = 0; i < length; ++i) {
if (string[i] == terminator) {
processedLength = i;
break;
}
if (!isASCIIDigit(string[i])) {
if (!decimalMarkSeen && string[i] == '.')
decimalMarkSeen = true;
else
return 0;
}
}
if (decimalMarkSeen && processedLength == 1)
return 0;
return processedLength;
}
// Returns the number of characters consumed for parsing a valid double
// terminated by the given terminator character
template <typename CharacterType>
static int parseDouble(const CharacterType* string, const CharacterType* end, const char terminator, double& value)
{
int length = checkForValidDouble(string, end, terminator);
if (!length)
return 0;
int position = 0;
double localValue = 0;
// The consumed characters here are guaranteed to be
// ASCII digits with or without a decimal mark
for (; position < length; ++position) {
if (string[position] == '.')
break;
localValue = localValue * 10 + string[position] - '0';
}
if (++position == length) {
value = localValue;
return length;
}
double fraction = 0;
double scale = 1;
while (position < length && scale < MAX_SCALE) {
fraction = fraction * 10 + string[position++] - '0';
scale *= 10;
}
value = localValue + fraction / scale;
return length;
}
template <typename CharacterType>
static bool parseColorIntOrPercentage(const CharacterType*& string, const CharacterType* end, const char terminator, CSSPrimitiveValue::UnitTypes& expect, int& value)
{
const CharacterType* current = string;
double localValue = 0;
bool negative = false;
while (current != end && isHTMLSpace(*current))
current++;
if (current != end && *current == '-') {
negative = true;
current++;
}
if (current == end || !isASCIIDigit(*current))
return false;
while (current != end && isASCIIDigit(*current)) {
double newValue = localValue * 10 + *current++ - '0';
if (newValue >= 255) {
// Clamp values at 255.
localValue = 255;
while (current != end && isASCIIDigit(*current))
++current;
break;
}
localValue = newValue;
}
if (current == end)
return false;
if (expect == CSSPrimitiveValue::CSS_NUMBER && (*current == '.' || *current == '%'))
return false;
if (*current == '.') {
// We already parsed the integral part, try to parse
// the fraction part of the percentage value.
double percentage = 0;
int numCharactersParsed = parseDouble(current, end, '%', percentage);
if (!numCharactersParsed)
return false;
current += numCharactersParsed;
if (*current != '%')
return false;
localValue += percentage;
}
if (expect == CSSPrimitiveValue::CSS_PERCENTAGE && *current != '%')
return false;
if (*current == '%') {
expect = CSSPrimitiveValue::CSS_PERCENTAGE;
localValue = localValue / 100.0 * 256.0;
// Clamp values at 255 for percentages over 100%
if (localValue > 255)
localValue = 255;
current++;
} else
expect = CSSPrimitiveValue::CSS_NUMBER;
while (current != end && isHTMLSpace(*current))
current++;
if (current == end || *current++ != terminator)
return false;
// Clamp negative values at zero.
value = negative ? 0 : static_cast<int>(localValue);
string = current;
return true;
}
template <typename CharacterType>
static inline bool isTenthAlpha(const CharacterType* string, const int length)
{
// "0.X"
if (length == 3 && string[0] == '0' && string[1] == '.' && isASCIIDigit(string[2]))
return true;
// ".X"
if (length == 2 && string[0] == '.' && isASCIIDigit(string[1]))
return true;
return false;
}
template <typename CharacterType>
static inline bool parseAlphaValue(const CharacterType*& string, const CharacterType* end, const char terminator, int& value)
{
while (string != end && isHTMLSpace(*string))
string++;
bool negative = false;
if (string != end && *string == '-') {
negative = true;
string++;
}
value = 0;
int length = end - string;
if (length < 2)
return false;
if (string[length - 1] != terminator || !isASCIIDigit(string[length - 2]))
return false;
if (string[0] != '0' && string[0] != '1' && string[0] != '.') {
if (checkForValidDouble(string, end, terminator)) {
value = negative ? 0 : 255;
string = end;
return true;
}
return false;
}
if (length == 2 && string[0] != '.') {
value = !negative && string[0] == '1' ? 255 : 0;
string = end;
return true;
}
if (isTenthAlpha(string, length - 1)) {
static const int tenthAlphaValues[] = { 0, 25, 51, 76, 102, 127, 153, 179, 204, 230 };
value = negative ? 0 : tenthAlphaValues[string[length - 2] - '0'];
string = end;
return true;
}
double alpha = 0;
if (!parseDouble(string, end, terminator, alpha))
return false;
value = negative ? 0 : static_cast<int>(alpha * nextafter(256.0, 0.0));
string = end;
return true;
}
template <typename CharacterType>
static inline bool mightBeRGBA(const CharacterType* characters, unsigned length)
{
if (length < 5)
return false;
return characters[4] == '('
&& isASCIIAlphaCaselessEqual(characters[0], 'r')
&& isASCIIAlphaCaselessEqual(characters[1], 'g')
&& isASCIIAlphaCaselessEqual(characters[2], 'b')
&& isASCIIAlphaCaselessEqual(characters[3], 'a');
}
template <typename CharacterType>
static inline bool mightBeRGB(const CharacterType* characters, unsigned length)
{
if (length < 4)
return false;
return characters[3] == '('
&& isASCIIAlphaCaselessEqual(characters[0], 'r')
&& isASCIIAlphaCaselessEqual(characters[1], 'g')
&& isASCIIAlphaCaselessEqual(characters[2], 'b');
}
template <typename CharacterType>
static inline bool fastParseColorInternal(RGBA32& rgb, const CharacterType* characters, unsigned length , bool strict)
{
CSSPrimitiveValue::UnitTypes expect = CSSPrimitiveValue::CSS_UNKNOWN;
if (!strict && length >= 3) {
if (characters[0] == '#') {
if (Color::parseHexColor(characters + 1, length - 1, rgb))
return true;
} else {
if (Color::parseHexColor(characters, length, rgb))
return true;
}
}
// Try rgba() syntax.
if (mightBeRGBA(characters, length)) {
const CharacterType* current = characters + 5;
const CharacterType* end = characters + length;
int red;
int green;
int blue;
int alpha;
if (!parseColorIntOrPercentage(current, end, ',', expect, red))
return false;
if (!parseColorIntOrPercentage(current, end, ',', expect, green))
return false;
if (!parseColorIntOrPercentage(current, end, ',', expect, blue))
return false;
if (!parseAlphaValue(current, end, ')', alpha))
return false;
if (current != end)
return false;
rgb = makeRGBA(red, green, blue, alpha);
return true;
}
// Try rgb() syntax.
if (mightBeRGB(characters, length)) {
const CharacterType* current = characters + 4;
const CharacterType* end = characters + length;
int red;
int green;
int blue;
if (!parseColorIntOrPercentage(current, end, ',', expect, red))
return false;
if (!parseColorIntOrPercentage(current, end, ',', expect, green))
return false;
if (!parseColorIntOrPercentage(current, end, ')', expect, blue))
return false;
if (current != end)
return false;
rgb = makeRGB(red, green, blue);
return true;
}
return false;
}
template<typename StringType>
bool CSSParser::fastParseColor(RGBA32& rgb, const StringType& name, bool strict)
{
unsigned length = name.length();
bool parseResult;
if (!length)
return false;
if (name.is8Bit())
parseResult = fastParseColorInternal(rgb, name.characters8(), length, strict);
else
parseResult = fastParseColorInternal(rgb, name.characters16(), length, strict);
if (parseResult)
return true;
// Try named colors.
Color tc;
tc.setNamedColor(name);
if (tc.isValid()) {
rgb = tc.rgb();
return true;
}
return false;
}
inline double CSSParser::parsedDouble(CSSParserValue *v, ReleaseParsedCalcValueCondition releaseCalc)
{
const double result = m_parsedCalculation ? m_parsedCalculation->doubleValue() : v->fValue;
if (releaseCalc == ReleaseParsedCalcValue)
m_parsedCalculation.release();
return result;
}
bool CSSParser::isCalculation(CSSParserValue* value)
{
return (value->unit == CSSParserValue::Function)
&& (equalIgnoringCase(value->function->name, "calc(")
|| equalIgnoringCase(value->function->name, "-webkit-calc(")
|| equalIgnoringCase(value->function->name, "-webkit-min(")
|| equalIgnoringCase(value->function->name, "-webkit-max("));
}
inline int CSSParser::colorIntFromValue(CSSParserValue* v)
{
bool isPercent;
if (m_parsedCalculation)
isPercent = m_parsedCalculation->category() == CalcPercent;
else
isPercent = v->unit == CSSPrimitiveValue::CSS_PERCENTAGE;
const double value = parsedDouble(v, ReleaseParsedCalcValue);
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 CSSParser::parseColorParameters(CSSParserValue* value, int* colorArray, bool parseAlpha)
{
CSSParserValueList* args = value->function->args.get();
CSSParserValue* v = args->current();
Units unitType = FUnknown;
// Get the first value and its type
if (validUnit(v, FInteger, CSSStrictMode))
unitType = FInteger;
else if (validUnit(v, FPercent, CSSStrictMode))
unitType = FPercent;
else
return false;
colorArray[0] = colorIntFromValue(v);
for (int i = 1; i < 3; i++) {
v = args->next();
if (v->unit != CSSParserValue::Operator && v->iValue != ',')
return false;
v = args->next();
if (!validUnit(v, unitType, CSSStrictMode))
return false;
colorArray[i] = colorIntFromValue(v);
}
if (parseAlpha) {
v = args->next();
if (v->unit != CSSParserValue::Operator && v->iValue != ',')
return false;
v = args->next();
if (!validUnit(v, FNumber, CSSStrictMode))
return false;
const double value = parsedDouble(v, ReleaseParsedCalcValue);
// 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<double>(0, std::min<double>(1, value)) * 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 CSSParser::parseHSLParameters(CSSParserValue* value, double* colorArray, bool parseAlpha)
{
CSSParserValueList* args = value->function->args.get();
CSSParserValue* v = args->current();
// Get the first value
if (!validUnit(v, FNumber, CSSStrictMode))
return false;
// normalize the Hue value and change it to be between 0 and 1.0
colorArray[0] = (((static_cast<int>(parsedDouble(v, ReleaseParsedCalcValue)) % 360) + 360) % 360) / 360.0;
for (int i = 1; i < 3; i++) {
v = args->next();
if (v->unit != CSSParserValue::Operator && v->iValue != ',')
return false;
v = args->next();
if (!validUnit(v, FPercent, CSSStrictMode))
return false;
colorArray[i] = std::max<double>(0, std::min<double>(100, parsedDouble(v, ReleaseParsedCalcValue))) / 100.0; // needs to be value between 0 and 1.0
}
if (parseAlpha) {
v = args->next();
if (v->unit != CSSParserValue::Operator && v->iValue != ',')
return false;
v = args->next();
if (!validUnit(v, FNumber, CSSStrictMode))
return false;
colorArray[3] = std::max<double>(0, std::min<double>(1, parsedDouble(v, ReleaseParsedCalcValue)));
}
return true;
}
PassRefPtr<CSSPrimitiveValue> CSSParser::parseColor(CSSParserValue* value)
{
RGBA32 c = Color::transparent;
if (!parseColorFromValue(value ? value : m_valueList->current(), c))
return 0;
return cssValuePool().createColorValue(c);
}
bool CSSParser::parseColorFromValue(CSSParserValue* value, RGBA32& c)
{
if (inQuirksMode() && value->unit == CSSPrimitiveValue::CSS_NUMBER
&& value->fValue >= 0. && value->fValue < 1000000.) {
String str = String::format("%06d", static_cast<int>((value->fValue+.5)));
// FIXME: This should be strict parsing for SVG as well.
if (!fastParseColor(c, str, inStrictMode()))
return false;
} else if (value->unit == CSSPrimitiveValue::CSS_PARSER_HEXCOLOR ||
value->unit == CSSPrimitiveValue::CSS_IDENT ||
(inQuirksMode() && value->unit == CSSPrimitiveValue::CSS_DIMENSION)) {
if (!fastParseColor(c, value->string, inStrictMode() && value->unit == CSSPrimitiveValue::CSS_IDENT))
return false;
} else if (value->unit == CSSParserValue::Function &&
value->function->args != 0 &&
value->function->args->size() == 5 /* rgb + two commas */ &&
equalIgnoringCase(value->function->name, "rgb(")) {
int colorValues[3];
if (!parseColorParameters(value, colorValues, false))
return false;
c = makeRGB(colorValues[0], colorValues[1], colorValues[2]);
} else {
if (value->unit == CSSParserValue::Function &&
value->function->args != 0 &&
value->function->args->size() == 7 /* rgba + three commas */ &&
equalIgnoringCase(value->function->name, "rgba(")) {
int colorValues[4];
if (!parseColorParameters(value, colorValues, true))
return false;
c = makeRGBA(colorValues[0], colorValues[1], colorValues[2], colorValues[3]);
} else if (value->unit == CSSParserValue::Function &&
value->function->args != 0 &&
value->function->args->size() == 5 /* hsl + two commas */ &&
equalIgnoringCase(value->function->name, "hsl(")) {
double colorValues[3];
if (!parseHSLParameters(value, colorValues, false))
return false;
c = makeRGBAFromHSLA(colorValues[0], colorValues[1], colorValues[2], 1.0);
} else if (value->unit == CSSParserValue::Function &&
value->function->args != 0 &&
value->function->args->size() == 7 /* hsla + three commas */ &&
equalIgnoringCase(value->function->name, "hsla(")) {
double colorValues[4];
if (!parseHSLParameters(value, colorValues, true))
return false;
c = makeRGBAFromHSLA(colorValues[0], colorValues[1], colorValues[2], colorValues[3]);
} else
return false;
}
return true;
}
// This class tracks parsing state for shadow values. If it goes out of scope (e.g., due to an early return)
// without the allowBreak bit being set, then it will clean up all of the objects and destroy them.
struct ShadowParseContext {
ShadowParseContext(CSSPropertyID prop, CSSParser* parser)
: property(prop)
, m_parser(parser)
, allowX(true)
, allowY(false)
, allowBlur(false)
, allowSpread(false)
, allowColor(true)
, allowStyle(prop == CSSPropertyWebkitBoxShadow || prop == CSSPropertyBoxShadow)
, allowBreak(true)
{
}
bool allowLength() { return allowX || allowY || allowBlur || allowSpread; }
void commitValue()
{
// Handle the ,, case gracefully by doing nothing.
if (x || y || blur || spread || color || style) {
if (!values)
values = CSSValueList::createCommaSeparated();
// Construct the current shadow value and add it to the list.
values->append(CSSShadowValue::create(x.release(), y.release(), blur.release(), spread.release(), style.release(), color.release()));
}
// Now reset for the next shadow value.
x = 0;
y = 0;
blur = 0;
spread = 0;
style = 0;
color = 0;
allowX = true;
allowColor = true;
allowBreak = true;
allowY = false;
allowBlur = false;
allowSpread = false;
allowStyle = property == CSSPropertyWebkitBoxShadow || property == CSSPropertyBoxShadow;
}
void commitLength(CSSParserValue* v)
{
RefPtr<CSSPrimitiveValue> val = m_parser->createPrimitiveNumericValue(v);
if (allowX) {
x = val.release();
allowX = false;
allowY = true;
allowColor = false;
allowStyle = false;
allowBreak = false;
} else if (allowY) {
y = val.release();
allowY = false;
allowBlur = true;
allowColor = true;
allowStyle = property == CSSPropertyWebkitBoxShadow || property == CSSPropertyBoxShadow;
allowBreak = true;
} else if (allowBlur) {
blur = val.release();
allowBlur = false;
allowSpread = property == CSSPropertyWebkitBoxShadow || property == CSSPropertyBoxShadow;
} else if (allowSpread) {
spread = val.release();
allowSpread = false;
}
}
void commitColor(PassRefPtr<CSSPrimitiveValue> val)
{
color = val;
allowColor = false;
if (allowX) {
allowStyle = false;
allowBreak = false;
} else {
allowBlur = false;
allowSpread = false;
allowStyle = property == CSSPropertyWebkitBoxShadow || property == CSSPropertyBoxShadow;
}
}
void commitStyle(CSSParserValue* v)
{
style = cssValuePool().createIdentifierValue(v->id);
allowStyle = false;
if (allowX)
allowBreak = false;
else {
allowBlur = false;
allowSpread = false;
allowColor = false;
}
}
CSSPropertyID property;
CSSParser* m_parser;
RefPtr<CSSValueList> values;
RefPtr<CSSPrimitiveValue> x;
RefPtr<CSSPrimitiveValue> y;
RefPtr<CSSPrimitiveValue> blur;
RefPtr<CSSPrimitiveValue> spread;
RefPtr<CSSPrimitiveValue> style;
RefPtr<CSSPrimitiveValue> color;
bool allowX;
bool allowY;
bool allowBlur;
bool allowSpread;
bool allowColor;
bool allowStyle; // inset or not.
bool allowBreak;
};
PassRefPtr<CSSValueList> CSSParser::parseShadow(CSSParserValueList* valueList, CSSPropertyID propId)
{
ShadowParseContext context(propId, this);
CSSParserValue* val;
while ((val = valueList->current())) {
// Check for a comma break first.
if (val->unit == CSSParserValue::Operator) {
if (val->iValue != ',' || !context.allowBreak)
// Other operators aren't legal or we aren't done with the current shadow
// value. Treat as invalid.
return 0;
// -webkit-svg-shadow does not support multiple values.
if (propId == CSSPropertyWebkitSvgShadow)
return 0;
// The value is good. Commit it.
context.commitValue();
} else if (validUnit(val, FLength, CSSStrictMode)) {
// We required a length and didn't get one. Invalid.
if (!context.allowLength())
return 0;
// Blur radius must be non-negative.
if (context.allowBlur && !validUnit(val, FLength | FNonNeg, CSSStrictMode))
return 0;
// A length is allowed here. Construct the value and add it.
context.commitLength(val);
} else if (val->id == CSSValueInset) {
if (!context.allowStyle)
return 0;
context.commitStyle(val);
} else {
// The only other type of value that's ok is a color value.
RefPtr<CSSPrimitiveValue> parsedColor;
bool isColor = ((val->id >= CSSValueAqua && val->id <= CSSValueWindowtext) || val->id == CSSValueMenu
|| (val->id >= CSSValueWebkitFocusRingColor && val->id <= CSSValueWebkitText && inQuirksMode())
|| val->id == CSSValueCurrentcolor);
if (isColor) {
if (!context.allowColor)
return 0;
parsedColor = cssValuePool().createIdentifierValue(val->id);
}
if (!parsedColor)
// It's not built-in. Try to parse it as a color.
parsedColor = parseColor(val);
if (!parsedColor || !context.allowColor)
return 0; // This value is not a color or length and is invalid or
// it is a color, but a color isn't allowed at this point.
context.commitColor(parsedColor.release());
}
valueList->next();
}
if (context.allowBreak) {
context.commitValue();
if (context.values && context.values->length())
return context.values.release();
}
return 0;
}
bool CSSParser::parseReflect(CSSPropertyID propId, bool important)
{
// box-reflect: <direction> <offset> <mask>
// Direction comes first.
CSSParserValue* val = m_valueList->current();
RefPtr<CSSPrimitiveValue> direction;
switch (val->id) {
case CSSValueAbove:
case CSSValueBelow:
case CSSValueLeft:
case CSSValueRight:
direction = cssValuePool().createIdentifierValue(val->id);
break;
default:
return false;
}
// The offset comes next.
val = m_valueList->next();
RefPtr<CSSPrimitiveValue> offset;
if (!val)
offset = cssValuePool().createValue(0, CSSPrimitiveValue::CSS_PX);
else {
if (!validUnit(val, FLength | FPercent))
return false;
offset = createPrimitiveNumericValue(val);
}
// Now for the mask.
RefPtr<CSSValue> mask;
val = m_valueList->next();
if (val) {
if (!parseBorderImage(propId, mask))
return false;
}
addProperty(propId, CSSReflectValue::create(direction.release(), offset.release(), mask.release()), important);
m_valueList->next();
return true;
}
bool CSSParser::parseFlex(CSSParserValueList* args, bool important)
{
if (!args || !args->size() || args->size() > 3)
return false;
static const double unsetValue = -1;
double flexGrow = unsetValue;
double flexShrink = unsetValue;
RefPtr<CSSPrimitiveValue> flexBasis;
while (CSSParserValue* arg = args->current()) {
if (validUnit(arg, FNumber | FNonNeg)) {
if (flexGrow == unsetValue)
flexGrow = arg->fValue;
else if (flexShrink == unsetValue)
flexShrink = arg->fValue;
else if (!arg->fValue) {
// flex only allows a basis of 0 (sans units) if flex-grow and flex-shrink values have already been set.
flexBasis = cssValuePool().createValue(0, CSSPrimitiveValue::CSS_PX);
} else {
// We only allow 3 numbers without units if the last value is 0. E.g., flex:1 1 1 is invalid.
return false;
}
} else if (!flexBasis && (arg->id == CSSValueAuto || validUnit(arg, FLength | FPercent | FNonNeg)))
flexBasis = parseValidPrimitive(arg->id, arg);
else {
// Not a valid arg for flex.
return false;
}
args->next();
}
if (flexGrow == unsetValue)
flexGrow = 1;
if (flexShrink == unsetValue)
flexShrink = 1;
if (!flexBasis)
flexBasis = cssValuePool().createValue(0, CSSPrimitiveValue::CSS_PX);
addProperty(CSSPropertyFlexGrow, cssValuePool().createValue(clampToFloat(flexGrow), CSSPrimitiveValue::CSS_NUMBER), important);
addProperty(CSSPropertyFlexShrink, cssValuePool().createValue(clampToFloat(flexShrink), CSSPrimitiveValue::CSS_NUMBER), important);
addProperty(CSSPropertyFlexBasis, flexBasis, important);
return true;
}
struct BorderImageParseContext {
BorderImageParseContext()
: m_canAdvance(false)
, m_allowCommit(true)
, m_allowImage(true)
, m_allowImageSlice(true)
, m_allowRepeat(true)
, m_allowForwardSlashOperator(false)
, m_requireWidth(false)
, m_requireOutset(false)
{}
bool canAdvance() const { return m_canAdvance; }
void setCanAdvance(bool canAdvance) { m_canAdvance = canAdvance; }
bool allowCommit() const { return m_allowCommit; }
bool allowImage() const { return m_allowImage; }
bool allowImageSlice() const { return m_allowImageSlice; }
bool allowRepeat() const { return m_allowRepeat; }
bool allowForwardSlashOperator() const { return m_allowForwardSlashOperator; }
bool requireWidth() const { return m_requireWidth; }
bool requireOutset() const { return m_requireOutset; }
void commitImage(PassRefPtr<CSSValue> image)
{
m_image = image;
m_canAdvance = true;
m_allowCommit = true;
m_allowImage = m_allowForwardSlashOperator = m_requireWidth = m_requireOutset = false;
m_allowImageSlice = !m_imageSlice;
m_allowRepeat = !m_repeat;
}
void commitImageSlice(PassRefPtr<CSSBorderImageSliceValue> slice)
{
m_imageSlice = slice;
m_canAdvance = true;
m_allowCommit = m_allowForwardSlashOperator = true;
m_allowImageSlice = m_requireWidth = m_requireOutset = false;
m_allowImage = !m_image;
m_allowRepeat = !m_repeat;
}
void commitForwardSlashOperator()
{
m_canAdvance = true;
m_allowCommit = m_allowImage = m_allowImageSlice = m_allowRepeat = m_allowForwardSlashOperator = false;
if (!m_borderSlice) {
m_requireWidth = true;
m_requireOutset = false;
} else {
m_requireOutset = true;
m_requireWidth = false;
}
}
void commitBorderWidth(PassRefPtr<CSSPrimitiveValue> slice)
{
m_borderSlice = slice;
m_canAdvance = true;
m_allowCommit = m_allowForwardSlashOperator = true;
m_allowImageSlice = m_requireWidth = m_requireOutset = false;
m_allowImage = !m_image;
m_allowRepeat = !m_repeat;
}
void commitBorderOutset(PassRefPtr<CSSPrimitiveValue> outset)
{
m_outset = outset;
m_canAdvance = true;
m_allowCommit = true;
m_allowImageSlice = m_allowForwardSlashOperator = m_requireWidth = m_requireOutset = false;
m_allowImage = !m_image;
m_allowRepeat = !m_repeat;
}
void commitRepeat(PassRefPtr<CSSValue> repeat)
{
m_repeat = repeat;
m_canAdvance = true;
m_allowCommit = true;
m_allowRepeat = m_allowForwardSlashOperator = m_requireWidth = m_requireOutset = false;
m_allowImageSlice = !m_imageSlice;
m_allowImage = !m_image;
}
PassRefPtr<CSSValue> commitWebKitBorderImage()
{
return createBorderImageValue(m_image, m_imageSlice, m_borderSlice, m_outset, m_repeat);
}
void commitBorderImage(CSSParser* parser, bool important)
{
commitBorderImageProperty(CSSPropertyBorderImageSource, parser, m_image, important);
commitBorderImageProperty(CSSPropertyBorderImageSlice, parser, m_imageSlice, important);
commitBorderImageProperty(CSSPropertyBorderImageWidth, parser, m_borderSlice, important);
commitBorderImageProperty(CSSPropertyBorderImageOutset, parser, m_outset, important);
commitBorderImageProperty(CSSPropertyBorderImageRepeat, parser, m_repeat, important);
}
void commitBorderImageProperty(CSSPropertyID propId, CSSParser* parser, PassRefPtr<CSSValue> value, bool important)
{
if (value)
parser->addProperty(propId, value, important);
else
parser->addProperty(propId, cssValuePool().createImplicitInitialValue(), important, true);
}
bool m_canAdvance;
bool m_allowCommit;
bool m_allowImage;
bool m_allowImageSlice;
bool m_allowRepeat;
bool m_allowForwardSlashOperator;
bool m_requireWidth;
bool m_requireOutset;
RefPtr<CSSValue> m_image;
RefPtr<CSSBorderImageSliceValue> m_imageSlice;
RefPtr<CSSPrimitiveValue> m_borderSlice;
RefPtr<CSSPrimitiveValue> m_outset;
RefPtr<CSSValue> m_repeat;
};
bool CSSParser::parseBorderImage(CSSPropertyID propId, RefPtr<CSSValue>& result, bool important)
{
ShorthandScope scope(this, propId);
BorderImageParseContext context;
while (CSSParserValue* val = m_valueList->current()) {
context.setCanAdvance(false);
if (!context.canAdvance() && context.allowForwardSlashOperator() && isForwardSlashOperator(val))
context.commitForwardSlashOperator();
if (!context.canAdvance() && context.allowImage()) {
if (val->unit == CSSPrimitiveValue::CSS_URI)
context.commitImage(CSSImageValue::create(completeURL(val->string)));
else if (isGeneratedImageValue(val)) {
RefPtr<CSSValue> value;
if (parseGeneratedImage(m_valueList.get(), value))
context.commitImage(value.release());
else
return false;
#if ENABLE(CSS_IMAGE_SET)
} else if (val->unit == CSSParserValue::Function && equalIgnoringCase(val->function->name, "-webkit-image-set(")) {
RefPtr<CSSValue> value = parseImageSet();
if (value)
context.commitImage(value.release());
else
return false;
#endif
} else if (val->id == CSSValueNone)
context.commitImage(cssValuePool().createIdentifierValue(CSSValueNone));
}
if (!context.canAdvance() && context.allowImageSlice()) {
RefPtr<CSSBorderImageSliceValue> imageSlice;
if (parseBorderImageSlice(propId, imageSlice))
context.commitImageSlice(imageSlice.release());
}
if (!context.canAdvance() && context.allowRepeat()) {
RefPtr<CSSValue> repeat;
if (parseBorderImageRepeat(repeat))
context.commitRepeat(repeat.release());
}
if (!context.canAdvance() && context.requireWidth()) {
RefPtr<CSSPrimitiveValue> borderSlice;
if (parseBorderImageWidth(borderSlice))
context.commitBorderWidth(borderSlice.release());
}
if (!context.canAdvance() && context.requireOutset()) {
RefPtr<CSSPrimitiveValue> borderOutset;
if (parseBorderImageOutset(borderOutset))
context.commitBorderOutset(borderOutset.release());
}
if (!context.canAdvance())
return false;
m_valueList->next();
}
if (context.allowCommit()) {
if (propId == CSSPropertyBorderImage)
context.commitBorderImage(this, important);
else
// Need to fully commit as a single value.
result = context.commitWebKitBorderImage();
return true;
}
return false;
}
static bool isBorderImageRepeatKeyword(int id)
{
return id == CSSValueStretch || id == CSSValueRepeat || id == CSSValueSpace || id == CSSValueRound;
}
bool CSSParser::parseBorderImageRepeat(RefPtr<CSSValue>& result)
{
RefPtr<CSSPrimitiveValue> firstValue;
RefPtr<CSSPrimitiveValue> secondValue;
CSSParserValue* val = m_valueList->current();
if (!val)
return false;
if (isBorderImageRepeatKeyword(val->id))
firstValue = cssValuePool().createIdentifierValue(val->id);
else
return false;
val = m_valueList->next();
if (val) {
if (isBorderImageRepeatKeyword(val->id))
secondValue = cssValuePool().createIdentifierValue(val->id);
else if (!inShorthand()) {
// If we're not parsing a shorthand then we are invalid.
return false;
} else {
// We need to rewind the value list, so that when its advanced we'll
// end up back at this value.
m_valueList->previous();
secondValue = firstValue;
}
} else
secondValue = firstValue;
result = createPrimitiveValuePair(firstValue, secondValue);
return true;
}
class BorderImageSliceParseContext {
public:
BorderImageSliceParseContext(CSSParser* parser)
: m_parser(parser)
, m_allowNumber(true)
, m_allowFill(true)
, m_allowFinalCommit(false)
, m_fill(false)
{ }
bool allowNumber() const { return m_allowNumber; }
bool allowFill() const { return m_allowFill; }
bool allowFinalCommit() const { return m_allowFinalCommit; }
CSSPrimitiveValue* top() const { return m_top.get(); }
void commitNumber(CSSParserValue* v)
{
RefPtr<CSSPrimitiveValue> val = m_parser->createPrimitiveNumericValue(v);
if (!m_top)
m_top = val;
else if (!m_right)
m_right = val;
else if (!m_bottom)
m_bottom = val;
else {
ASSERT(!m_left);
m_left = val;
}
m_allowNumber = !m_left;
m_allowFinalCommit = true;
}
void commitFill() { m_fill = true; m_allowFill = false; m_allowNumber = !m_top; }
PassRefPtr<CSSBorderImageSliceValue> commitBorderImageSlice()
{
// We need to clone and repeat values for any omissions.
ASSERT(m_top);
if (!m_right) {
m_right = m_top;
m_bottom = m_top;
m_left = m_top;
}
if (!m_bottom) {
m_bottom = m_top;
m_left = m_right;
}
if (!m_left)
m_left = m_right;
// Now build a rect value to hold all four of our primitive values.
RefPtr<Quad> quad = Quad::create();
quad->setTop(m_top);
quad->setRight(m_right);
quad->setBottom(m_bottom);
quad->setLeft(m_left);
// Make our new border image value now.
return CSSBorderImageSliceValue::create(cssValuePool().createValue(quad.release()), m_fill);
}
private:
CSSParser* m_parser;
bool m_allowNumber;
bool m_allowFill;
bool m_allowFinalCommit;
RefPtr<CSSPrimitiveValue> m_top;
RefPtr<CSSPrimitiveValue> m_right;
RefPtr<CSSPrimitiveValue> m_bottom;
RefPtr<CSSPrimitiveValue> m_left;
bool m_fill;
};
bool CSSParser::parseBorderImageSlice(CSSPropertyID propId, RefPtr<CSSBorderImageSliceValue>& result)
{
BorderImageSliceParseContext context(this);
CSSParserValue* val;
while ((val = m_valueList->current())) {
// FIXME calc() http://webkit.org/b/16662 : calc is parsed but values are not created yet.
if (context.allowNumber() && !isCalculation(val) && validUnit(val, FInteger | FNonNeg | FPercent, CSSStrictMode)) {
context.commitNumber(val);
} else if (context.allowFill() && val->id == CSSValueFill)
context.commitFill();
else if (!inShorthand()) {
// If we're not parsing a shorthand then we are invalid.
return false;
} else {
if (context.allowFinalCommit()) {
// We're going to successfully parse, but we don't want to consume this token.
m_valueList->previous();
}
break;
}
m_valueList->next();
}
if (context.allowFinalCommit()) {
// FIXME: For backwards compatibility, -webkit-border-image, -webkit-mask-box-image and -webkit-box-reflect have to do a fill by default.
// FIXME: What do we do with -webkit-box-reflect and -webkit-mask-box-image? Probably just have to leave them filling...
if (propId == CSSPropertyWebkitBorderImage || propId == CSSPropertyWebkitMaskBoxImage || propId == CSSPropertyWebkitBoxReflect)
context.commitFill();
// Need to fully commit as a single value.
result = context.commitBorderImageSlice();
return true;
}
return false;
}
class BorderImageQuadParseContext {
public:
BorderImageQuadParseContext(CSSParser* parser)
: m_parser(parser)
, m_allowNumber(true)
, m_allowFinalCommit(false)
{ }
bool allowNumber() const { return m_allowNumber; }
bool allowFinalCommit() const { return m_allowFinalCommit; }
CSSPrimitiveValue* top() const { return m_top.get(); }
void commitNumber(CSSParserValue* v)
{
RefPtr<CSSPrimitiveValue> val;
if (v->id == CSSValueAuto)
val = cssValuePool().createIdentifierValue(v->id);
else
val = m_parser->createPrimitiveNumericValue(v);
if (!m_top)
m_top = val;
else if (!m_right)
m_right = val;
else if (!m_bottom)
m_bottom = val;
else {
ASSERT(!m_left);
m_left = val;
}
m_allowNumber = !m_left;
m_allowFinalCommit = true;
}
void setAllowFinalCommit() { m_allowFinalCommit = true; }
void setTop(PassRefPtr<CSSPrimitiveValue> val) { m_top = val; }
PassRefPtr<CSSPrimitiveValue> commitBorderImageQuad()
{
// We need to clone and repeat values for any omissions.
ASSERT(m_top);
if (!m_right) {
m_right = m_top;
m_bottom = m_top;
m_left = m_top;
}
if (!m_bottom) {
m_bottom = m_top;
m_left = m_right;
}
if (!m_left)
m_left = m_right;
// Now build a quad value to hold all four of our primitive values.
RefPtr<Quad> quad = Quad::create();
quad->setTop(m_top);
quad->setRight(m_right);
quad->setBottom(m_bottom);
quad->setLeft(m_left);
// Make our new value now.
return cssValuePool().createValue(quad.release());
}
private:
CSSParser* m_parser;
bool m_allowNumber;
bool m_allowFinalCommit;
RefPtr<CSSPrimitiveValue> m_top;
RefPtr<CSSPrimitiveValue> m_right;
RefPtr<CSSPrimitiveValue> m_bottom;
RefPtr<CSSPrimitiveValue> m_left;
};
bool CSSParser::parseBorderImageQuad(Units validUnits, RefPtr<CSSPrimitiveValue>& result)
{
BorderImageQuadParseContext context(this);
CSSParserValue* val;
while ((val = m_valueList->current())) {
if (context.allowNumber() && (validUnit(val, validUnits, CSSStrictMode) || val->id == CSSValueAuto)) {
context.commitNumber(val);
} else if (!inShorthand()) {
// If we're not parsing a shorthand then we are invalid.
return false;
} else {
if (context.allowFinalCommit())
m_valueList->previous(); // The shorthand loop will advance back to this point.
break;
}
m_valueList->next();
}
if (context.allowFinalCommit()) {
// Need to fully commit as a single value.
result = context.commitBorderImageQuad();
return true;
}
return false;
}
bool CSSParser::parseBorderImageWidth(RefPtr<CSSPrimitiveValue>& result)
{
return parseBorderImageQuad(FLength | FInteger | FNonNeg | FPercent, result);
}
bool CSSParser::parseBorderImageOutset(RefPtr<CSSPrimitiveValue>& result)
{
return parseBorderImageQuad(FLength | FInteger | FNonNeg, result);
}
bool CSSParser::parseBorderRadius(CSSPropertyID propId, bool important)
{
unsigned num = m_valueList->size();
if (num > 9)
return false;
ShorthandScope scope(this, propId);
RefPtr<CSSPrimitiveValue> radii[2][4];
unsigned indexAfterSlash = 0;
for (unsigned i = 0; i < num; ++i) {
CSSParserValue* value = m_valueList->valueAt(i);
if (value->unit == CSSParserValue::Operator) {
if (value->iValue != '/')
return false;
if (!i || indexAfterSlash || i + 1 == num || num > i + 5)
return false;
indexAfterSlash = i + 1;
completeBorderRadii(radii[0]);
continue;
}
if (i - indexAfterSlash >= 4)
return false;
if (!validUnit(value, FLength | FPercent | FNonNeg))
return false;
RefPtr<CSSPrimitiveValue> radius = createPrimitiveNumericValue(value);
if (!indexAfterSlash) {
radii[0][i] = radius;
// Legacy syntax: -webkit-border-radius: l1 l2; is equivalent to border-radius: l1 / l2;
if (num == 2 && propId == CSSPropertyWebkitBorderRadius) {
indexAfterSlash = 1;
completeBorderRadii(radii[0]);
}
} else
radii[1][i - indexAfterSlash] = radius.release();
}
if (!indexAfterSlash) {
completeBorderRadii(radii[0]);
for (unsigned i = 0; i < 4; ++i)
radii[1][i] = radii[0][i];
} else
completeBorderRadii(radii[1]);
ImplicitScope implicitScope(this, PropertyImplicit);
addProperty(CSSPropertyBorderTopLeftRadius, createPrimitiveValuePair(radii[0][0].release(), radii[1][0].release()), important);
addProperty(CSSPropertyBorderTopRightRadius, createPrimitiveValuePair(radii[0][1].release(), radii[1][1].release()), important);
addProperty(CSSPropertyBorderBottomRightRadius, createPrimitiveValuePair(radii[0][2].release(), radii[1][2].release()), important);
addProperty(CSSPropertyBorderBottomLeftRadius, createPrimitiveValuePair(radii[0][3].release(), radii[1][3].release()), important);
return true;
}
bool CSSParser::parseAspectRatio(bool important)
{
unsigned num = m_valueList->size();
if (num == 1) {
CSSValueID valueId = m_valueList->valueAt(0)->id;
if (valueId == CSSValueAuto || valueId == CSSValueFromDimensions || valueId == CSSValueFromIntrinsic) {
addProperty(CSSPropertyWebkitAspectRatio, cssValuePool().createIdentifierValue(valueId), important);
return true;
}
}
if (num != 3)
return false;
CSSParserValue* lvalue = m_valueList->valueAt(0);
CSSParserValue* op = m_valueList->valueAt(1);
CSSParserValue* rvalue = m_valueList->valueAt(2);
if (!isForwardSlashOperator(op))
return false;
if (!validUnit(lvalue, FNumber | FNonNeg) || !validUnit(rvalue, FNumber | FNonNeg))
return false;
if (!lvalue->fValue || !rvalue->fValue)
return false;
addProperty(CSSPropertyWebkitAspectRatio, CSSAspectRatioValue::create(narrowPrecisionToFloat(lvalue->fValue), narrowPrecisionToFloat(rvalue->fValue)), important);
return true;
}
bool CSSParser::parseCounter(CSSPropertyID propId, int defaultValue, bool important)
{
enum { ID, VAL } state = ID;
RefPtr<CSSValueList> list = CSSValueList::createCommaSeparated();
RefPtr<CSSPrimitiveValue> counterName;
while (true) {
CSSParserValue* val = m_valueList->current();
switch (state) {
case ID:
if (val && val->unit == CSSPrimitiveValue::CSS_IDENT) {
counterName = createPrimitiveStringValue(val);
state = VAL;
m_valueList->next();
continue;
}
break;
case VAL: {
int i = defaultValue;
if (val && val->unit == CSSPrimitiveValue::CSS_NUMBER) {
i = clampToInteger(val->fValue);
m_valueList->next();
}
list->append(createPrimitiveValuePair(counterName.release(),
cssValuePool().createValue(i, CSSPrimitiveValue::CSS_NUMBER)));
state = ID;
continue;
}
}
break;
}
if (list->length() > 0) {
addProperty(propId, list.release(), important);
return true;
}
return false;
}
// This should go away once we drop support for -webkit-gradient
static PassRefPtr<CSSPrimitiveValue> parseDeprecatedGradientPoint(CSSParserValue* a, bool horizontal)
{
RefPtr<CSSPrimitiveValue> result;
if (a->unit == CSSPrimitiveValue::CSS_IDENT) {
if ((equalIgnoringCase(a, "left") && horizontal)
|| (equalIgnoringCase(a, "top") && !horizontal))
result = cssValuePool().createValue(0., CSSPrimitiveValue::CSS_PERCENTAGE);
else if ((equalIgnoringCase(a, "right") && horizontal)
|| (equalIgnoringCase(a, "bottom") && !horizontal))
result = cssValuePool().createValue(100., CSSPrimitiveValue::CSS_PERCENTAGE);
else if (equalIgnoringCase(a, "center"))
result = cssValuePool().createValue(50., CSSPrimitiveValue::CSS_PERCENTAGE);
} else if (a->unit == CSSPrimitiveValue::CSS_NUMBER || a->unit == CSSPrimitiveValue::CSS_PERCENTAGE)
result = cssValuePool().createValue(a->fValue, static_cast<CSSPrimitiveValue::UnitTypes>(a->unit));
return result;
}
static bool parseDeprecatedGradientColorStop(CSSParser* p, CSSParserValue* a, CSSGradientColorStop& stop)
{
if (a->unit != CSSParserValue::Function)
return false;
if (!equalIgnoringCase(a->function->name, "from(") &&
!equalIgnoringCase(a->function->name, "to(") &&
!equalIgnoringCase(a->function->name, "color-stop("))
return false;
CSSParserValueList* args = a->function->args.get();
if (!args)
return false;
if (equalIgnoringCase(a->function->name, "from(")
|| equalIgnoringCase(a->function->name, "to(")) {
// The "from" and "to" stops expect 1 argument.
if (args->size() != 1)
return false;
if (equalIgnoringCase(a->function->name, "from("))
stop.m_position = cssValuePool().createValue(0, CSSPrimitiveValue::CSS_NUMBER);
else
stop.m_position = cssValuePool().createValue(1, CSSPrimitiveValue::CSS_NUMBER);
CSSValueID id = args->current()->id;
if (id == CSSValueWebkitText || (id >= CSSValueAqua && id <= CSSValueWindowtext) || id == CSSValueMenu)
stop.m_color = cssValuePool().createIdentifierValue(id);
else
stop.m_color = p->parseColor(args->current());
if (!stop.m_color)
return false;
}
// The "color-stop" function expects 3 arguments.
if (equalIgnoringCase(a->function->name, "color-stop(")) {
if (args->size() != 3)
return false;
CSSParserValue* stopArg = args->current();
if (stopArg->unit == CSSPrimitiveValue::CSS_PERCENTAGE)
stop.m_position = cssValuePool().createValue(stopArg->fValue / 100, CSSPrimitiveValue::CSS_NUMBER);
else if (stopArg->unit == CSSPrimitiveValue::CSS_NUMBER)
stop.m_position = cssValuePool().createValue(stopArg->fValue, CSSPrimitiveValue::CSS_NUMBER);
else
return false;
stopArg = args->next();
if (stopArg->unit != CSSParserValue::Operator || stopArg->iValue != ',')
return false;
stopArg = args->next();
CSSValueID id = stopArg->id;
if (id == CSSValueWebkitText || (id >= CSSValueAqua && id <= CSSValueWindowtext) || id == CSSValueMenu)
stop.m_color = cssValuePool().createIdentifierValue(id);
else
stop.m_color = p->parseColor(stopArg);
if (!stop.m_color)
return false;
}
return true;
}
bool CSSParser::parseDeprecatedGradient(CSSParserValueList* valueList, RefPtr<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->unit != CSSPrimitiveValue::CSS_IDENT)
return false;
if (equalIgnoringCase(a, "linear"))
gradientType = CSSDeprecatedLinearGradient;
else if (equalIgnoringCase(a, "radial"))
gradientType = CSSDeprecatedRadialGradient;
else
return false;
RefPtr<CSSGradientValue> result;
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();
}
// Comma.
a = args->next();
if (!isComma(a))
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->next();
if (!a)
return false;
RefPtr<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.
a = args->next();
if (!isComma(a))
return false;
// For radial gradients only, we now expect a numeric radius.
if (gradientType == CSSDeprecatedRadialGradient) {
a = args->next();
if (!a || a->unit != CSSPrimitiveValue::CSS_NUMBER)
return false;
downcast<CSSRadialGradientValue>(*result).setFirstRadius(createPrimitiveNumericValue(a));
// Comma after the first radius.
a = args->next();
if (!isComma(a))
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->next();
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());
// For radial gradients only, we now expect the second radius.
if (gradientType == CSSDeprecatedRadialGradient) {
// Comma after the second point.
a = args->next();
if (!isComma(a))
return false;
a = args->next();
if (!a || a->unit != CSSPrimitiveValue::CSS_NUMBER)
return false;
downcast<CSSRadialGradientValue>(*result).setSecondRadius(createPrimitiveNumericValue(a));
}
// We now will accept any number of stops (0 or more).
a = args->next();
while (a) {
// Look for the comma before the next stop.
if (!isComma(a))
return false;
// Now examine the stop itself.
a = args->next();
if (!a)
return false;
// The function name needs to be one of "from", "to", or "color-stop."
CSSGradientColorStop stop;
if (!parseDeprecatedGradientColorStop(this, a, stop))
return false;
result->addStop(stop);
// Advance
a = args->next();
}
gradient = result.release();
return true;
}
static PassRefPtr<CSSPrimitiveValue> valueFromSideKeyword(CSSParserValue* a, bool& isHorizontal)
{
if (a->unit != CSSPrimitiveValue::CSS_IDENT)
return 0;
switch (a->id) {
case CSSValueLeft:
case CSSValueRight:
isHorizontal = true;
break;
case CSSValueTop:
case CSSValueBottom:
isHorizontal = false;
break;
default:
return 0;
}
return cssValuePool().createIdentifierValue(a->id);
}
static PassRefPtr<CSSPrimitiveValue> parseGradientColorOrKeyword(CSSParser* p, CSSParserValue* value)
{
CSSValueID id = value->id;
if (id == CSSValueWebkitText || (id >= CSSValueAqua && id <= CSSValueWindowtext) || id == CSSValueMenu || id == CSSValueCurrentcolor)
return cssValuePool().createIdentifierValue(id);
return p->parseColor(value);
}
bool CSSParser::parseDeprecatedLinearGradient(CSSParserValueList* valueList, RefPtr<CSSValue>& gradient, CSSGradientRepeat repeating)
{
RefPtr<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, CSSStrictMode)) {
result->setAngle(createPrimitiveNumericValue(a));
args->next();
expectComma = true;
} else {
// Look one or two optional keywords that indicate a side or corner.
RefPtr<CSSPrimitiveValue> startX, startY;
RefPtr<CSSPrimitiveValue> location;
bool isHorizontal = false;
if ((location = valueFromSideKeyword(a, isHorizontal))) {
if (isHorizontal)
startX = location;
else
startY = location;
if ((a = args->next())) {
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 CSSParser::parseDeprecatedRadialGradient(CSSParserValueList* valueList, RefPtr<CSSValue>& gradient, CSSGradientRepeat repeating)
{
RefPtr<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
RefPtr<CSSValue> centerX;
RefPtr<CSSValue> centerY;
// parse2ValuesFillPosition advances the args next pointer.
parse2ValuesFillPosition(args, centerX, centerY);
a = args->current();
if (!a)
return false;
if (centerX || centerY) {
// Comma
if (!isComma(a))
return false;
a = args->next();
if (!a)
return false;
}
result->setFirstX(downcast<CSSPrimitiveValue>(centerX.get()));
result->setSecondX(downcast<CSSPrimitiveValue>(centerX.get()));
// CSS3 radial gradients always share the same start and end point.
result->setFirstY(downcast<CSSPrimitiveValue>(centerY.get()));
result->setSecondY(downcast<CSSPrimitiveValue>(centerY.get()));
RefPtr<CSSPrimitiveValue> shapeValue;
RefPtr<CSSPrimitiveValue> sizeValue;
// Optional shape and/or size in any order.
for (int i = 0; i < 2; ++i) {
if (a->unit != CSSPrimitiveValue::CSS_IDENT)
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
RefPtr<CSSPrimitiveValue> horizontalSize;
RefPtr<CSSPrimitiveValue> verticalSize;
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 CSSParser::parseLinearGradient(CSSParserValueList* valueList, RefPtr<CSSValue>& gradient, CSSGradientRepeat repeating)
{
RefPtr<CSSLinearGradientValue> result = CSSLinearGradientValue::create(repeating, CSSLinearGradient);
CSSParserValueList* args = valueList->current()->function->args.get();
if (!args || !args->size())
return false;
CSSParserValue* a = args->current();
if (!a)
return false;
bool expectComma = false;
// Look for angle.
if (validUnit(a, FAngle, CSSStrictMode)) {
result->setAngle(createPrimitiveNumericValue(a));
args->next();
expectComma = true;
} else if (a->unit == CSSPrimitiveValue::CSS_IDENT && equalIgnoringCase(a, "to")) {
// to [ [left | right] || [top | bottom] ]
a = args->next();
if (!a)
return false;
RefPtr<CSSPrimitiveValue> endX, endY;
RefPtr<CSSPrimitiveValue> location;
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 CSSParser::parseRadialGradient(CSSParserValueList* valueList, RefPtr<CSSValue>& gradient, CSSGradientRepeat repeating)
{
RefPtr<CSSRadialGradientValue> result = CSSRadialGradientValue::create(repeating, CSSRadialGradient);
CSSParserValueList* args = valueList->current()->function->args.get();
if (!args || !args->size())
return false;
CSSParserValue* a = args->current();
if (!a)
return false;
bool expectComma = false;
RefPtr<CSSPrimitiveValue> shapeValue;
RefPtr<CSSPrimitiveValue> sizeValue;
RefPtr<CSSPrimitiveValue> horizontalSize;
RefPtr<CSSPrimitiveValue> verticalSize;
// First part of grammar, the size/shape clause:
// [ circle || <length> ] |
// [ ellipse || [ <length> | <percentage> ]{2} ] |
// [ [ circle | ellipse] || <size-keyword> ]
for (int i = 0; i < 3; ++i) {
if (a->unit == CSSPrimitiveValue::CSS_IDENT) {
bool badIdent = false;
switch (a->id) {
case CSSValueCircle:
case CSSValueEllipse:
if (shapeValue)
return false;
shapeValue = cssValuePool().createIdentifierValue(a->id);
break;
case CSSValueClosestSide:
case CSSValueClosestCorner:
case CSSValueFarthestSide:
case CSSValueFarthestCorner:
if (sizeValue || horizontalSize)
return false;
sizeValue = cssValuePool().createIdentifierValue(a->id);
break;
default:
badIdent = true;
}
if (badIdent)
break;
a = args->next();
if (!a)
return false;
} else if (validUnit(a, FLength | FPercent)) {
if (sizeValue || horizontalSize)
return false;
horizontalSize = createPrimitiveNumericValue(a);
a = args->next();
if (!a)
return false;
if (validUnit(a, FLength | FPercent)) {
verticalSize = createPrimitiveNumericValue(a);
++i;
a = args->next();
if (!a)
return false;
}
} else
break;
}
// You can specify size as a keyword or a length/percentage, not both.
if (sizeValue && horizontalSize)
return false;
// Circles must have 0 or 1 lengths.
if (shapeValue && shapeValue->getValueID() == CSSValueCircle && verticalSize)
return false;
// Ellipses must have 0 or 2 length/percentages.
if (shapeValue && shapeValue->getValueID() == CSSValueEllipse && horizontalSize && !verticalSize)
return false;
// If there's only one size, it must be a length.
if (!verticalSize && horizontalSize && horizontalSize->isPercentage())
return false;
result->setShape(shapeValue);
result->setSizingBehavior(sizeValue);
result->setEndHorizontalSize(horizontalSize);
result->setEndVerticalSize(verticalSize);
// Second part of grammar, the center-position clause:
// at <position>
RefPtr<CSSValue> centerX;
RefPtr<CSSValue> centerY;
if (a->unit == CSSPrimitiveValue::CSS_IDENT && equalIgnoringCase(a, "at")) {
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(downcast<CSSPrimitiveValue>(centerX.get()));
result->setFirstY(downcast<CSSPrimitiveValue>(centerY.get()));
// Right now, CSS radial gradients have the same start and end centers.
result->setSecondX(downcast<CSSPrimitiveValue>(centerX.get()));
result->setSecondY(downcast<CSSPrimitiveValue>(centerY.get()));
}
if (shapeValue || sizeValue || horizontalSize || centerX || centerY)
expectComma = true;
if (!parseGradientColorStops(args, result.get(), expectComma))
return false;
gradient = result.release();
return true;
}
bool CSSParser::parseGradientColorStops(CSSParserValueList* valueList, CSSGradientValue* gradient, bool expectComma)
{
CSSParserValue* a = valueList->current();
bool previousStopWasMidpoint = true;
// Now look for color stops.
while (a) {
// Look for the comma before the next stop.
if (expectComma) {
if (!isComma(a))
return false;
a = valueList->next();
if (!a)
return false;
}
// <color-stop> = <color> [ <percentage> | <length> ]?
CSSGradientColorStop stop;
stop.m_color = parseGradientColorOrKeyword(this, a);
if (!stop.m_color) {
if (previousStopWasMidpoint) // 2 midpoints in a row is not allowed. This also catches starting with a midpoint.
return false;
stop.isMidpoint = true;
} else
a = valueList->next();
previousStopWasMidpoint = stop.isMidpoint;
if (a) {
if (validUnit(a, FLength | FPercent)) {
stop.m_position = createPrimitiveNumericValue(a);
a = valueList->next();
} else if (stop.isMidpoint)
return false;
}
gradient->addStop(stop);
expectComma = true;
}
// We can't end on a midpoint.
if (previousStopWasMidpoint)
return false;
// Must have 2 or more stops to be valid.
return gradient->stopCount() >= 2;
}
bool CSSParser::isGeneratedImageValue(CSSParserValue* val) const
{
if (val->unit != CSSParserValue::Function)
return false;
return equalIgnoringCase(val->function->name, "-webkit-gradient(")
|| equalIgnoringCase(val->function->name, "-webkit-linear-gradient(")
|| equalIgnoringCase(val->function->name, "linear-gradient(")
|| equalIgnoringCase(val->function->name, "-webkit-repeating-linear-gradient(")
|| equalIgnoringCase(val->function->name, "repeating-linear-gradient(")
|| equalIgnoringCase(val->function->name, "-webkit-radial-gradient(")
|| equalIgnoringCase(val->function->name, "radial-gradient(")
|| equalIgnoringCase(val->function->name, "-webkit-repeating-radial-gradient(")
|| equalIgnoringCase(val->function->name, "repeating-radial-gradient(")
|| equalIgnoringCase(val->function->name, "-webkit-canvas(")
|| equalIgnoringCase(val->function->name, "-webkit-cross-fade(")
|| equalIgnoringCase(val->function->name, "-webkit-filter(");
}
bool CSSParser::parseGeneratedImage(CSSParserValueList* valueList, RefPtr<CSSValue>& value)
{
CSSParserValue* val = valueList->current();
if (val->unit != CSSParserValue::Function)
return false;
if (equalIgnoringCase(val->function->name, "-webkit-gradient("))
return parseDeprecatedGradient(valueList, value);
if (equalIgnoringCase(val->function->name, "-webkit-linear-gradient("))
return parseDeprecatedLinearGradient(valueList, value, NonRepeating);
if (equalIgnoringCase(val->function->name, "linear-gradient("))
return parseLinearGradient(valueList, value, NonRepeating);
if (equalIgnoringCase(val->function->name, "-webkit-repeating-linear-gradient("))
return parseDeprecatedLinearGradient(valueList, value, Repeating);
if (equalIgnoringCase(val->function->name, "repeating-linear-gradient("))
return parseLinearGradient(valueList, value, Repeating);
if (equalIgnoringCase(val->function->name, "-webkit-radial-gradient("))
return parseDeprecatedRadialGradient(valueList, value, NonRepeating);
if (equalIgnoringCase(val->function->name, "radial-gradient("))
return parseRadialGradient(valueList, value, NonRepeating);
if (equalIgnoringCase(val->function->name, "-webkit-repeating-radial-gradient("))
return parseDeprecatedRadialGradient(valueList, value, Repeating);
if (equalIgnoringCase(val->function->name, "repeating-radial-gradient("))
return parseRadialGradient(valueList, value, Repeating);
if (equalIgnoringCase(val->function->name, "-webkit-canvas("))
return parseCanvas(valueList, value);
if (equalIgnoringCase(val->function->name, "-webkit-cross-fade("))
return parseCrossfade(valueList, value);
if (equalIgnoringCase(val->function->name, "-webkit-filter("))
return parseFilterImage(valueList, value);
return false;
}
bool CSSParser::parseFilterImage(CSSParserValueList* valueList, RefPtr<CSSValue>& filter)
{
RefPtr<CSSFilterImageValue> result;
// Walk the arguments.
CSSParserValueList* args = valueList->current()->function->args.get();
if (!args)
return false;
CSSParserValue* value = args->current();
RefPtr<CSSValue> imageValue;
RefPtr<CSSValue> filterValue;
if (!value)
return false;
// The first argument is the image. It is a fill image.
if (!parseFillImage(args, imageValue)) {
if (value->unit == CSSPrimitiveValue::CSS_STRING)
imageValue = CSSImageValue::create(completeURL(value->string));
else
return false;
}
value = args->next();
// Skip a comma
if (!isComma(value))
return false;
value = args->next();
if (!value || !parseFilter(args, filterValue))
return false;
value = args->next();
result = CSSFilterImageValue::create(imageValue.releaseNonNull(), filterValue.releaseNonNull());
filter = result;
return true;
}
bool CSSParser::parseCrossfade(CSSParserValueList* valueList, RefPtr<CSSValue>& crossfade)
{
RefPtr<CSSCrossfadeValue> result;
// Walk the arguments.
CSSParserValueList* args = valueList->current()->function->args.get();
if (!args || args->size() != 5)
return false;
CSSParserValue* a = args->current();
RefPtr<CSSValue> fromImageValue;
RefPtr<CSSValue> toImageValue;
// The first argument is the "from" image. It is a fill image.
if (!a || !parseFillImage(args, fromImageValue))
return false;
a = args->next();
// Skip a comma
if (!isComma(a))
return false;
a = args->next();
// The second argument is the "to" image. It is a fill image.
if (!a || !parseFillImage(args, toImageValue))
return false;
a = args->next();
// Skip a comma
if (!isComma(a))
return false;
a = args->next();
// The third argument is the crossfade value. It is a percentage or a fractional number.
RefPtr<CSSPrimitiveValue> percentage;
if (!a)
return false;
if (a->unit == CSSPrimitiveValue::CSS_PERCENTAGE)
percentage = cssValuePool().createValue(clampTo<double>(a->fValue / 100, 0, 1), CSSPrimitiveValue::CSS_NUMBER);
else if (a->unit == CSSPrimitiveValue::CSS_NUMBER)
percentage = cssValuePool().createValue(clampTo<double>(a->fValue, 0, 1), CSSPrimitiveValue::CSS_NUMBER);
else
return false;
result = CSSCrossfadeValue::create(fromImageValue, toImageValue);
result->setPercentage(percentage);
crossfade = result;
return true;
}
bool CSSParser::parseCanvas(CSSParserValueList* valueList, RefPtr<CSSValue>& canvas)
{
// Walk the arguments.
CSSParserValueList* args = valueList->current()->function->args.get();
if (!args || args->size() != 1)
return false;
// The first argument is the canvas name. It is an identifier.
CSSParserValue* value = args->current();
if (!value || value->unit != CSSPrimitiveValue::CSS_IDENT)
return false;
canvas = CSSCanvasValue::create(value->string);
return true;
}
#if ENABLE(CSS_IMAGE_RESOLUTION)
PassRefPtr<CSSValue> CSSParser::parseImageResolution()
{
RefPtr<CSSValueList> list = CSSValueList::createSpaceSeparated();
bool haveResolution = false;
bool haveFromImage = false;
bool haveSnap = false;
CSSParserValue* value = m_valueList->current();
while (value) {
if (!haveFromImage && value->id == CSSValueFromImage) {
list->append(cssValuePool().createIdentifierValue(value->id));
haveFromImage = true;
} else if (!haveSnap && value->id == CSSValueSnap) {
list->append(cssValuePool().createIdentifierValue(value->id));
haveSnap = true;
} else if (!haveResolution && validUnit(value, FResolution | FNonNeg) && value->fValue > 0) {
list->append(createPrimitiveNumericValue(value));
haveResolution = true;
} else
return 0;
value = m_valueList->next();
}
if (!list->length())
return 0;
if (!haveFromImage && !haveResolution)
return 0;
return list.release();
}
#endif
#if ENABLE(CSS_IMAGE_SET)
PassRefPtr<CSSValue> CSSParser::parseImageSet()
{
CSSParserValue* value = m_valueList->current();
ASSERT(value->unit == CSSParserValue::Function);
CSSParserValueList* functionArgs = value->function->args.get();
if (!functionArgs || !functionArgs->size() || !functionArgs->current())
return 0;
RefPtr<CSSImageSetValue> imageSet = CSSImageSetValue::create();
CSSParserValue* arg = functionArgs->current();
while (arg) {
if (arg->unit != CSSPrimitiveValue::CSS_URI)
return 0;
imageSet->append(CSSImageValue::create(completeURL(arg->string)));
arg = functionArgs->next();
if (!arg || arg->unit != CSSPrimitiveValue::CSS_DIMENSION)
return 0;
double imageScaleFactor = 0;
const String& string = arg->string;
unsigned length = string.length();
if (!length)
return 0;
if (string.is8Bit()) {
const LChar* start = string.characters8();
parseDouble(start, start + length, 'x', imageScaleFactor);
} else {
const UChar* start = string.characters16();
parseDouble(start, start + length, 'x', imageScaleFactor);
}
if (imageScaleFactor <= 0)
return 0;
imageSet->append(cssValuePool().createValue(imageScaleFactor, CSSPrimitiveValue::CSS_NUMBER));
// If there are no more arguments, we're done.
arg = functionArgs->next();
if (!arg)
break;
// If there are more arguments, they should be after a comma.
if (!isComma(arg))
return 0;
// Skip the comma and move on to the next argument.
arg = functionArgs->next();
}
return imageSet.release();
}
#endif
class TransformOperationInfo {
public:
TransformOperationInfo(const CSSParserString& name)
: m_type(WebKitCSSTransformValue::UnknownTransformOperation)
, m_argCount(1)
, m_allowSingleArgument(false)
, m_unit(CSSParser::FUnknown)
{
const UChar* characters;
unsigned nameLength = name.length();
const unsigned longestNameLength = 12;
UChar characterBuffer[longestNameLength];
if (name.is8Bit()) {
unsigned length = std::min(longestNameLength, nameLength);
const LChar* characters8 = name.characters8();
for (unsigned i = 0; i < length; ++i)
characterBuffer[i] = characters8[i];
characters = characterBuffer;
} else
characters = name.characters16();
switch (nameLength) {
case 5:
// Valid name: skew(.
if (((characters[0] == 's') || (characters[0] == 'S'))
& ((characters[1] == 'k') || (characters[1] == 'K'))
& ((characters[2] == 'e') || (characters[2] == 'E'))
& ((characters[3] == 'w') || (characters[3] == 'W'))
& (characters[4] == '(')) {
m_unit = CSSParser::FAngle;
m_type = WebKitCSSTransformValue::SkewTransformOperation;
m_allowSingleArgument = true;
m_argCount = 3;
}
break;
case 6:
// Valid names: skewx(, skewy(, scale(.
if ((characters[1] == 'c') || (characters[1] == 'C')) {
if (((characters[0] == 's') || (characters[0] == 'S'))
& ((characters[2] == 'a') || (characters[2] == 'A'))
& ((characters[3] == 'l') || (characters[3] == 'L'))
& ((characters[4] == 'e') || (characters[4] == 'E'))
& (characters[5] == '(')) {
m_unit = CSSParser::FNumber;
m_type = WebKitCSSTransformValue::ScaleTransformOperation;
m_allowSingleArgument = true;
m_argCount = 3;
}
} else if (((characters[0] == 's') || (characters[0] == 'S'))
& ((characters[1] == 'k') || (characters[1] == 'K'))
& ((characters[2] == 'e') || (characters[2] == 'E'))
& ((characters[3] == 'w') || (characters[3] == 'W'))
& (characters[5] == '(')) {
if ((characters[4] == 'x') || (characters[4] == 'X')) {
m_unit = CSSParser::FAngle;
m_type = WebKitCSSTransformValue::SkewXTransformOperation;
} else if ((characters[4] == 'y') || (characters[4] == 'Y')) {
m_unit = CSSParser::FAngle;
m_type = WebKitCSSTransformValue::SkewYTransformOperation;
}
}
break;
case 7:
// Valid names: matrix(, rotate(, scalex(, scaley(, scalez(.
if ((characters[0] == 'm') || (characters[0] == 'M')) {
if (((characters[1] == 'a') || (characters[1] == 'A'))
& ((characters[2] == 't') || (characters[2] == 'T'))
& ((characters[3] == 'r') || (characters[3] == 'R'))
& ((characters[4] == 'i') || (characters[4] == 'I'))
& ((characters[5] == 'x') || (characters[5] == 'X'))
& (characters[6] == '(')) {
m_unit = CSSParser::FNumber;
m_type = WebKitCSSTransformValue::MatrixTransformOperation;
m_argCount = 11;
}
} else if ((characters[0] == 'r') || (characters[0] == 'R')) {
if (((characters[1] == 'o') || (characters[1] == 'O'))
& ((characters[2] == 't') || (characters[2] == 'T'))
& ((characters[3] == 'a') || (characters[3] == 'A'))
& ((characters[4] == 't') || (characters[4] == 'T'))
& ((characters[5] == 'e') || (characters[5] == 'E'))
& (characters[6] == '(')) {
m_unit = CSSParser::FAngle;
m_type = WebKitCSSTransformValue::RotateTransformOperation;
}
} else if (((characters[0] == 's') || (characters[0] == 'S'))
& ((characters[1] == 'c') || (characters[1] == 'C'))
& ((characters[2] == 'a') || (characters[2] == 'A'))
& ((characters[3] == 'l') || (characters[3] == 'L'))
& ((characters[4] == 'e') || (characters[4] == 'E'))
& (characters[6] == '(')) {
if ((characters[5] == 'x') || (characters[5] == 'X')) {
m_unit = CSSParser::FNumber;
m_type = WebKitCSSTransformValue::ScaleXTransformOperation;
} else if ((characters[5] == 'y') || (characters[5] == 'Y')) {
m_unit = CSSParser::FNumber;
m_type = WebKitCSSTransformValue::ScaleYTransformOperation;
} else if ((characters[5] == 'z') || (characters[5] == 'Z')) {
m_unit = CSSParser::FNumber;
m_type = WebKitCSSTransformValue::ScaleZTransformOperation;
}
}
break;
case 8:
// Valid names: rotatex(, rotatey(, rotatez(, scale3d(.
if ((characters[0] == 's') || (characters[0] == 'S')) {
if (((characters[1] == 'c') || (characters[1] == 'C'))
& ((characters[2] == 'a') || (characters[2] == 'A'))
& ((characters[3] == 'l') || (characters[3] == 'L'))
& ((characters[4] == 'e') || (characters[4] == 'E'))
& (characters[5] == '3')
& ((characters[6] == 'd') || (characters[6] == 'D'))
& (characters[7] == '(')) {
m_unit = CSSParser::FNumber;
m_type = WebKitCSSTransformValue::Scale3DTransformOperation;
m_argCount = 5;
}
} else if (((characters[0] == 'r') || (characters[0] == 'R'))
& ((characters[1] == 'o') || (characters[1] == 'O'))
& ((characters[2] == 't') || (characters[2] == 'T'))
& ((characters[3] == 'a') || (characters[3] == 'A'))
& ((characters[4] == 't') || (characters[4] == 'T'))
& ((characters[5] == 'e') || (characters[5] == 'E'))
& (characters[7] == '(')) {
if ((characters[6] == 'x') || (characters[6] == 'X')) {
m_unit = CSSParser::FAngle;
m_type = WebKitCSSTransformValue::RotateXTransformOperation;
} else if ((characters[6] == 'y') || (characters[6] == 'Y')) {
m_unit = CSSParser::FAngle;
m_type = WebKitCSSTransformValue::RotateYTransformOperation;
} else if ((characters[6] == 'z') || (characters[6] == 'Z')) {
m_unit = CSSParser::FAngle;
m_type = WebKitCSSTransformValue::RotateZTransformOperation;
}
}
break;
case 9:
// Valid names: matrix3d(, rotate3d(.
if ((characters[0] == 'm') || (characters[0] == 'M')) {
if (((characters[1] == 'a') || (characters[1] == 'A'))
& ((characters[2] == 't') || (characters[2] == 'T'))
& ((characters[3] == 'r') || (characters[3] == 'R'))
& ((characters[4] == 'i') || (characters[4] == 'I'))
& ((characters[5] == 'x') || (characters[5] == 'X'))
& (characters[6] == '3')
& ((characters[7] == 'd') || (characters[7] == 'D'))
& (characters[8] == '(')) {
m_unit = CSSParser::FNumber;
m_type = WebKitCSSTransformValue::Matrix3DTransformOperation;
m_argCount = 31;
}
} else if (((characters[0] == 'r') || (characters[0] == 'R'))
& ((characters[1] == 'o') || (characters[1] == 'O'))
& ((characters[2] == 't') || (characters[2] == 'T'))
& ((characters[3] == 'a') || (characters[3] == 'A'))
& ((characters[4] == 't') || (characters[4] == 'T'))
& ((characters[5] == 'e') || (characters[5] == 'E'))
& (characters[6] == '3')
& ((characters[7] == 'd') || (characters[7] == 'D'))
& (characters[8] == '(')) {
m_unit = CSSParser::FNumber;
m_type = WebKitCSSTransformValue::Rotate3DTransformOperation;
m_argCount = 7;
}
break;
case 10:
// Valid name: translate(.
if (((characters[0] == 't') || (characters[0] == 'T'))
& ((characters[1] == 'r') || (characters[1] == 'R'))
& ((characters[2] == 'a') || (characters[2] == 'A'))
& ((characters[3] == 'n') || (characters[3] == 'N'))
& ((characters[4] == 's') || (characters[4] == 'S'))
& ((characters[5] == 'l') || (characters[5] == 'L'))
& ((characters[6] == 'a') || (characters[6] == 'A'))
& ((characters[7] == 't') || (characters[7] == 'T'))
& ((characters[8] == 'e') || (characters[8] == 'E'))
& (characters[9] == '(')) {
m_unit = CSSParser::FLength | CSSParser::FPercent;
m_type = WebKitCSSTransformValue::TranslateTransformOperation;
m_allowSingleArgument = true;
m_argCount = 3;
}
break;
case 11:
// Valid names: translatex(, translatey(, translatez(.
if (((characters[0] == 't') || (characters[0] == 'T'))
& ((characters[1] == 'r') || (characters[1] == 'R'))
& ((characters[2] == 'a') || (characters[2] == 'A'))
& ((characters[3] == 'n') || (characters[3] == 'N'))
& ((characters[4] == 's') || (characters[4] == 'S'))
& ((characters[5] == 'l') || (characters[5] == 'L'))
& ((characters[6] == 'a') || (characters[6] == 'A'))
& ((characters[7] == 't') || (characters[7] == 'T'))
& ((characters[8] == 'e') || (characters[8] == 'E'))
& (characters[10] == '(')) {
if ((characters[9] == 'x') || (characters[9] == 'X')) {
m_unit = CSSParser::FLength | CSSParser::FPercent;
m_type = WebKitCSSTransformValue::TranslateXTransformOperation;
} else if ((characters[9] == 'y') || (characters[9] == 'Y')) {
m_unit = CSSParser::FLength | CSSParser::FPercent;
m_type = WebKitCSSTransformValue::TranslateYTransformOperation;
} else if ((characters[9] == 'z') || (characters[9] == 'Z')) {
m_unit = CSSParser::FLength | CSSParser::FPercent;
m_type = WebKitCSSTransformValue::TranslateZTransformOperation;
}
}
break;
case 12:
// Valid names: perspective(, translate3d(.
if ((characters[0] == 'p') || (characters[0] == 'P')) {
if (((characters[1] == 'e') || (characters[1] == 'E'))
& ((characters[2] == 'r') || (characters[2] == 'R'))
& ((characters[3] == 's') || (characters[3] == 'S'))
& ((characters[4] == 'p') || (characters[4] == 'P'))
& ((characters[5] == 'e') || (characters[5] == 'E'))
& ((characters[6] == 'c') || (characters[6] == 'C'))
& ((characters[7] == 't') || (characters[7] == 'T'))
& ((characters[8] == 'i') || (characters[8] == 'I'))
& ((characters[9] == 'v') || (characters[9] == 'V'))
& ((characters[10] == 'e') || (characters[10] == 'E'))
& (characters[11] == '(')) {
m_unit = CSSParser::FNumber;
m_type = WebKitCSSTransformValue::PerspectiveTransformOperation;
}
} else if (((characters[0] == 't') || (characters[0] == 'T'))
& ((characters[1] == 'r') || (characters[1] == 'R'))
& ((characters[2] == 'a') || (characters[2] == 'A'))
& ((characters[3] == 'n') || (characters[3] == 'N'))
& ((characters[4] == 's') || (characters[4] == 'S'))
& ((characters[5] == 'l') || (characters[5] == 'L'))
& ((characters[6] == 'a') || (characters[6] == 'A'))
& ((characters[7] == 't') || (characters[7] == 'T'))
& ((characters[8] == 'e') || (characters[8] == 'E'))
& (characters[9] == '3')
& ((characters[10] == 'd') || (characters[10] == 'D'))
& (characters[11] == '(')) {
m_unit = CSSParser::FLength | CSSParser::FPercent;
m_type = WebKitCSSTransformValue::Translate3DTransformOperation;
m_argCount = 5;
}
break;
} // end switch ()
}
WebKitCSSTransformValue::TransformOperationType type() const { return m_type; }
unsigned argCount() const { return m_argCount; }
CSSParser::Units unit() const { return m_unit; }
bool unknown() const { return m_type == WebKitCSSTransformValue::UnknownTransformOperation; }
bool hasCorrectArgCount(unsigned argCount) { return m_argCount == argCount || (m_allowSingleArgument && argCount == 1); }
private:
WebKitCSSTransformValue::TransformOperationType m_type;
unsigned m_argCount;
bool m_allowSingleArgument;
CSSParser::Units m_unit;
};
PassRefPtr<CSSValueList> CSSParser::parseTransform()
{
if (!m_valueList)
return 0;
RefPtr<CSSValueList> list = CSSValueList::createSpaceSeparated();
for (CSSParserValue* value = m_valueList->current(); value; value = m_valueList->next()) {
RefPtr<CSSValue> parsedTransformValue = parseTransformValue(value);
if (!parsedTransformValue)
return 0;
list->append(parsedTransformValue.releaseNonNull());
}
return list.release();
}
PassRefPtr<CSSValue> CSSParser::parseTransformValue(CSSParserValue *value)
{
if (value->unit != CSSParserValue::Function || !value->function)
return 0;
// Every primitive requires at least one argument.
CSSParserValueList* args = value->function->args.get();
if (!args)
return 0;
// See if the specified primitive is one we understand.
TransformOperationInfo info(value->function->name);
if (info.unknown())
return 0;
if (!info.hasCorrectArgCount(args->size()))
return 0;
// The transform is a list of functional primitives that specify transform operations.
// We collect a list of WebKitCSSTransformValues, where each value specifies a single operation.
// Create the new WebKitCSSTransformValue for this operation and add it to our list.
RefPtr<WebKitCSSTransformValue> transformValue = WebKitCSSTransformValue::create(info.type());
// Snag our values.
CSSParserValue* a = args->current();
unsigned argNumber = 0;
while (a) {
CSSParser::Units unit = info.unit();
if (info.type() == WebKitCSSTransformValue::Rotate3DTransformOperation && argNumber == 3) {
// 4th param of rotate3d() is an angle rather than a bare number, validate it as such
if (!validUnit(a, FAngle, CSSStrictMode))
return 0;
} else if (info.type() == WebKitCSSTransformValue::Translate3DTransformOperation && argNumber == 2) {
// 3rd param of translate3d() cannot be a percentage
if (!validUnit(a, FLength, CSSStrictMode))
return 0;
} else if (info.type() == WebKitCSSTransformValue::TranslateZTransformOperation && !argNumber) {
// 1st param of translateZ() cannot be a percentage
if (!validUnit(a, FLength, CSSStrictMode))
return 0;
} else if (info.type() == WebKitCSSTransformValue::PerspectiveTransformOperation && !argNumber) {
// 1st param of perspective() must be a non-negative number (deprecated) or length.
if (!validUnit(a, FNumber | FLength | FNonNeg, CSSStrictMode))
return 0;
} else if (!validUnit(a, unit, CSSStrictMode))
return 0;
// Add the value to the current transform operation.
transformValue->append(createPrimitiveNumericValue(a));
a = args->next();
if (!a)
break;
if (a->unit != CSSParserValue::Operator || a->iValue != ',')
return 0;
a = args->next();
argNumber++;
}
return transformValue.release();
}
bool CSSParser::isBlendMode(CSSValueID valueID)
{
return (valueID >= CSSValueMultiply && valueID <= CSSValueLuminosity)
|| valueID == CSSValueNormal
|| valueID == CSSValueOverlay;
}
bool CSSParser::isCompositeOperator(CSSValueID valueID)
{
// FIXME: Add CSSValueDestination and CSSValueLighter when the Compositing spec updates.
return valueID >= CSSValueClear && valueID <= CSSValueXor;
}
static void filterInfoForName(const CSSParserString& name, WebKitCSSFilterValue::FilterOperationType& filterType, unsigned& maximumArgumentCount)
{
if (equalIgnoringCase(name, "grayscale("))
filterType = WebKitCSSFilterValue::GrayscaleFilterOperation;
else if (equalIgnoringCase(name, "sepia("))
filterType = WebKitCSSFilterValue::SepiaFilterOperation;
else if (equalIgnoringCase(name, "saturate("))
filterType = WebKitCSSFilterValue::SaturateFilterOperation;
else if (equalIgnoringCase(name, "hue-rotate("))
filterType = WebKitCSSFilterValue::HueRotateFilterOperation;
else if (equalIgnoringCase(name, "invert("))
filterType = WebKitCSSFilterValue::InvertFilterOperation;
else if (equalIgnoringCase(name, "opacity("))
filterType = WebKitCSSFilterValue::OpacityFilterOperation;
else if (equalIgnoringCase(name, "brightness("))
filterType = WebKitCSSFilterValue::BrightnessFilterOperation;
else if (equalIgnoringCase(name, "contrast("))
filterType = WebKitCSSFilterValue::ContrastFilterOperation;
else if (equalIgnoringCase(name, "blur("))
filterType = WebKitCSSFilterValue::BlurFilterOperation;
else if (equalIgnoringCase(name, "drop-shadow(")) {
filterType = WebKitCSSFilterValue::DropShadowFilterOperation;
maximumArgumentCount = 4; // x-offset, y-offset, blur-radius, color -- spread and inset style not allowed.
}
}
PassRefPtr<WebKitCSSFilterValue> CSSParser::parseBuiltinFilterArguments(CSSParserValueList* args, WebKitCSSFilterValue::FilterOperationType filterType)
{
RefPtr<WebKitCSSFilterValue> filterValue = WebKitCSSFilterValue::create(filterType);
ASSERT(args);
switch (filterType) {
case WebKitCSSFilterValue::GrayscaleFilterOperation:
case WebKitCSSFilterValue::SepiaFilterOperation:
case WebKitCSSFilterValue::SaturateFilterOperation:
case WebKitCSSFilterValue::InvertFilterOperation:
case WebKitCSSFilterValue::OpacityFilterOperation:
case WebKitCSSFilterValue::ContrastFilterOperation: {
// One optional argument, 0-1 or 0%-100%, if missing use 100%.
if (args->size() > 1)
return 0;
if (args->size()) {
CSSParserValue* value = args->current();
if (!validUnit(value, FNumber | FPercent | FNonNeg, CSSStrictMode))
return 0;
double amount = value->fValue;
// Saturate and Contrast allow values over 100%.
if (filterType != WebKitCSSFilterValue::SaturateFilterOperation
&& filterType != WebKitCSSFilterValue::ContrastFilterOperation) {
double maxAllowed = value->unit == CSSPrimitiveValue::CSS_PERCENTAGE ? 100.0 : 1.0;
if (amount > maxAllowed)
return 0;
}
filterValue->append(cssValuePool().createValue(amount, static_cast<CSSPrimitiveValue::UnitTypes>(value->unit)));
}
break;
}
case WebKitCSSFilterValue::BrightnessFilterOperation: {
// One optional argument, if missing use 100%.
if (args->size() > 1)
return 0;
if (args->size()) {
CSSParserValue* value = args->current();
if (!validUnit(value, FNumber | FPercent, CSSStrictMode))
return 0;
filterValue->append(cssValuePool().createValue(value->fValue, static_cast<CSSPrimitiveValue::UnitTypes>(value->unit)));
}
break;
}
case WebKitCSSFilterValue::HueRotateFilterOperation: {
// hue-rotate() takes one optional angle.
if (args->size() > 1)
return 0;
if (args->size()) {
CSSParserValue* argument = args->current();
if (!validUnit(argument, FAngle, CSSStrictMode))
return 0;
filterValue->append(createPrimitiveNumericValue(argument));
}
break;
}
case WebKitCSSFilterValue::BlurFilterOperation: {
// Blur takes a single length. Zero parameters are allowed.
if (args->size() > 1)
return 0;
if (args->size()) {
CSSParserValue* argument = args->current();
if (!validUnit(argument, FLength | FNonNeg, CSSStrictMode))
return 0;
filterValue->append(createPrimitiveNumericValue(argument));
}
break;
}
case WebKitCSSFilterValue::DropShadowFilterOperation: {
// drop-shadow() takes a single shadow.
RefPtr<CSSValueList> shadowValueList = parseShadow(args, CSSPropertyWebkitFilter);
if (!shadowValueList || shadowValueList->length() != 1)
return 0;
filterValue->append(*shadowValueList->itemWithoutBoundsCheck(0));
break;
}
default:
ASSERT_NOT_REACHED();
}
return filterValue.release();
}
bool CSSParser::parseFilter(CSSParserValueList* valueList, RefPtr<CSSValue>& result)
{
if (!valueList)
return false;
// The filter is a list of functional primitives that specify individual operations.
RefPtr<CSSValueList> list = CSSValueList::createSpaceSeparated();
for (auto value = valueList->current(); value; value = valueList->next()) {
if (value->unit != CSSPrimitiveValue::CSS_URI && (value->unit != CSSParserValue::Function || !value->function))
return false;
WebKitCSSFilterValue::FilterOperationType filterType = WebKitCSSFilterValue::UnknownFilterOperation;
// See if the specified primitive is one we understand.
if (value->unit == CSSPrimitiveValue::CSS_URI) {
RefPtr<WebKitCSSFilterValue> referenceFilterValue = WebKitCSSFilterValue::create(WebKitCSSFilterValue::ReferenceFilterOperation);
referenceFilterValue->append(CSSPrimitiveValue::create(value->string, CSSPrimitiveValue::CSS_URI));
list->append(referenceFilterValue.releaseNonNull());
} else {
const CSSParserString name = value->function->name;
unsigned maximumArgumentCount = 1;
filterInfoForName(name, filterType, maximumArgumentCount);
if (filterType == WebKitCSSFilterValue::UnknownFilterOperation)
return false;
CSSParserValueList* args = value->function->args.get();
if (!args)
return false;
RefPtr<WebKitCSSFilterValue> filterValue = parseBuiltinFilterArguments(args, filterType);
if (!filterValue)
return false;
list->append(filterValue.releaseNonNull());
}
}
result = list;
return true;
}
#if ENABLE(CSS_REGIONS)
static bool validFlowName(const String& flowName)
{
return !(equalIgnoringCase(flowName, "auto")
|| equalIgnoringCase(flowName, "default")
|| equalIgnoringCase(flowName, "inherit")
|| equalIgnoringCase(flowName, "initial")
|| equalIgnoringCase(flowName, "none"));
}
#endif
bool CSSParser::cssRegionsEnabled() const
{
return m_context.isCSSRegionsEnabled;
}
bool CSSParser::cssCompositingEnabled() const
{
return m_context.isCSSCompositingEnabled;
}
#if ENABLE(CSS_REGIONS)
// none | <ident>
bool CSSParser::parseFlowThread(CSSPropertyID propId, bool important)
{
ASSERT(propId == CSSPropertyWebkitFlowInto);
ASSERT(cssRegionsEnabled());
if (m_valueList->size() != 1)
return false;
CSSParserValue* value = m_valueList->current();
if (!value)
return false;
if (value->unit != CSSPrimitiveValue::CSS_IDENT)
return false;
if (value->id == CSSValueNone) {
addProperty(propId, cssValuePool().createIdentifierValue(value->id), important);
return true;
}
String inputProperty = String(value->string);
if (!inputProperty.isEmpty()) {
if (!validFlowName(inputProperty))
return false;
addProperty(propId, cssValuePool().createValue(inputProperty, CSSPrimitiveValue::CSS_STRING), important);
} else
addProperty(propId, cssValuePool().createIdentifierValue(CSSValueNone), important);
return true;
}
// -webkit-flow-from: none | <ident>
bool CSSParser::parseRegionThread(CSSPropertyID propId, bool important)
{
ASSERT(propId == CSSPropertyWebkitFlowFrom);
ASSERT(cssRegionsEnabled());
if (m_valueList->size() != 1)
return false;
CSSParserValue* value = m_valueList->current();
if (!value)
return false;
if (value->unit != CSSPrimitiveValue::CSS_IDENT)
return false;
if (value->id == CSSValueNone)
addProperty(propId, cssValuePool().createIdentifierValue(value->id), important);
else {
String inputProperty = String(value->string);
if (!inputProperty.isEmpty()) {
if (!validFlowName(inputProperty))
return false;
addProperty(propId, cssValuePool().createValue(inputProperty, CSSPrimitiveValue::CSS_STRING), important);
} else
addProperty(propId, cssValuePool().createIdentifierValue(CSSValueNone), important);
}
return true;
}
#endif
bool CSSParser::parseTransformOrigin(CSSPropertyID propId, CSSPropertyID& propId1, CSSPropertyID& propId2, CSSPropertyID& propId3, RefPtr<CSSValue>& value, RefPtr<CSSValue>& value2, RefPtr<CSSValue>& value3)
{
propId1 = propId;
propId2 = propId;
propId3 = propId;
if (propId == CSSPropertyWebkitTransformOrigin) {
propId1 = CSSPropertyWebkitTransformOriginX;
propId2 = CSSPropertyWebkitTransformOriginY;
propId3 = CSSPropertyWebkitTransformOriginZ;
}
switch (propId) {
case CSSPropertyWebkitTransformOrigin:
if (!parseTransformOriginShorthand(value, value2, value3))
return false;
// parseTransformOriginShorthand advances the m_valueList pointer
break;
case CSSPropertyWebkitTransformOriginX: {
value = parseFillPositionX(m_valueList.get());
if (value)
m_valueList->next();
break;
}
case CSSPropertyWebkitTransformOriginY: {
value = parseFillPositionY(m_valueList.get());
if (value)
m_valueList->next();
break;
}
case CSSPropertyWebkitTransformOriginZ: {
if (validUnit(m_valueList->current(), FLength))
value = createPrimitiveNumericValue(m_valueList->current());
if (value)
m_valueList->next();
break;
}
default:
ASSERT_NOT_REACHED();
return false;
}
return value;
}
bool CSSParser::parsePerspectiveOrigin(CSSPropertyID propId, CSSPropertyID& propId1, CSSPropertyID& propId2, RefPtr<CSSValue>& value, RefPtr<CSSValue>& value2)
{
propId1 = propId;
propId2 = propId;
if (propId == CSSPropertyWebkitPerspectiveOrigin) {
propId1 = CSSPropertyWebkitPerspectiveOriginX;
propId2 = CSSPropertyWebkitPerspectiveOriginY;
}
switch (propId) {
case CSSPropertyWebkitPerspectiveOrigin:
if (m_valueList->size() > 2)
return false;
parse2ValuesFillPosition(m_valueList.get(), value, value2);
break;
case CSSPropertyWebkitPerspectiveOriginX: {
value = parseFillPositionX(m_valueList.get());
if (value)
m_valueList->next();
break;
}
case CSSPropertyWebkitPerspectiveOriginY: {
value = parseFillPositionY(m_valueList.get());
if (value)
m_valueList->next();
break;
}
default:
ASSERT_NOT_REACHED();
return false;
}
return value;
}
void CSSParser::addTextDecorationProperty(CSSPropertyID propId, PassRefPtr<CSSValue> value, bool important)
{
// The text-decoration-line property takes priority over text-decoration, unless the latter has important priority set.
if (propId == CSSPropertyTextDecoration && !important && !inShorthand()) {
for (unsigned i = 0; i < m_parsedProperties.size(); ++i) {
if (m_parsedProperties[i].id() == CSSPropertyWebkitTextDecorationLine)
return;
}
}
addProperty(propId, value, important);
}
bool CSSParser::parseTextDecoration(CSSPropertyID propId, bool important)
{
CSSParserValue* value = m_valueList->current();
if (value && value->id == CSSValueNone) {
addTextDecorationProperty(propId, cssValuePool().createIdentifierValue(CSSValueNone), important);
m_valueList->next();
return true;
}
RefPtr<CSSValueList> list = CSSValueList::createSpaceSeparated();
bool isValid = true;
while (isValid && value) {
switch (value->id) {
case CSSValueBlink:
case CSSValueLineThrough:
case CSSValueOverline:
case CSSValueUnderline:
#if ENABLE(LETTERPRESS)
case CSSValueWebkitLetterpress:
#endif
list->append(cssValuePool().createIdentifierValue(value->id));
break;
default:
isValid = false;
break;
}
if (isValid)
value = m_valueList->next();
}
// Values are either valid or in shorthand scope.
if (list->length() && (isValid || inShorthand())) {
addTextDecorationProperty(propId, list.release(), important);
return true;
}
return false;
}
bool CSSParser::parseTextDecorationSkip(bool important)
{
// The text-decoration-skip property has syntax "none | [ objects || spaces || ink || edges || box-decoration ]".
// However, only 'none' and 'ink' are implemented yet, so we will parse syntax "none | ink" for now.
CSSParserValue* value = m_valueList->current();
do {
switch (value->id) {
case CSSValueNone:
case CSSValueAuto:
case CSSValueInk:
case CSSValueObjects:
addProperty(CSSPropertyWebkitTextDecorationSkip, cssValuePool().createIdentifierValue(value->id), important);
return true;
default:
break;
}
} while ((value = m_valueList->next()));
return false;
}
bool CSSParser::parseTextUnderlinePosition(bool important)
{
// The text-underline-position property has sintax "auto | alphabetic | [ under || [ left | right ] ]".
// However, values 'left' and 'right' are not implemented yet, so we will parse sintax
// "auto | alphabetic | under" for now.
CSSParserValue* value = m_valueList->current();
switch (value->id) {
case CSSValueAuto:
case CSSValueAlphabetic:
case CSSValueUnder:
if (m_valueList->next())
return false;
addProperty(CSSPropertyWebkitTextUnderlinePosition, cssValuePool().createIdentifierValue(value->id), important);
return true;
default:
break;
}
return false;
}
bool CSSParser::parseTextEmphasisStyle(bool important)
{
unsigned valueListSize = m_valueList->size();
RefPtr<CSSPrimitiveValue> fill;
RefPtr<CSSPrimitiveValue> shape;
for (CSSParserValue* value = m_valueList->current(); value; value = m_valueList->next()) {
if (value->unit == CSSPrimitiveValue::CSS_STRING) {
if (fill || shape || (valueListSize != 1 && !inShorthand()))
return false;
addProperty(CSSPropertyWebkitTextEmphasisStyle, createPrimitiveStringValue(value), important);
m_valueList->next();
return true;
}
if (value->id == CSSValueNone) {
if (fill || shape || (valueListSize != 1 && !inShorthand()))
return false;
addProperty(CSSPropertyWebkitTextEmphasisStyle, cssValuePool().createIdentifierValue(CSSValueNone), important);
m_valueList->next();
return true;
}
if (value->id == CSSValueOpen || value->id == CSSValueFilled) {
if (fill)
return false;
fill = cssValuePool().createIdentifierValue(value->id);
} else if (value->id == CSSValueDot || value->id == CSSValueCircle || value->id == CSSValueDoubleCircle || value->id == CSSValueTriangle || value->id == CSSValueSesame) {
if (shape)
return false;
shape = cssValuePool().createIdentifierValue(value->id);
} else if (!inShorthand())
return false;
else
break;
}
if (fill && shape) {
RefPtr<CSSValueList> parsedValues = CSSValueList::createSpaceSeparated();
parsedValues->append(fill.releaseNonNull());
parsedValues->append(shape.releaseNonNull());
addProperty(CSSPropertyWebkitTextEmphasisStyle, parsedValues.release(), important);
return true;
}
if (fill) {
addProperty(CSSPropertyWebkitTextEmphasisStyle, fill.release(), important);
return true;
}
if (shape) {
addProperty(CSSPropertyWebkitTextEmphasisStyle, shape.release(), important);
return true;
}
return false;
}
bool CSSParser::parseTextEmphasisPosition(bool important)
{
bool foundOverOrUnder = false;
CSSValueID overUnderValueID = CSSValueOver;
bool foundLeftOrRight = false;
CSSValueID leftRightValueID = CSSValueRight;
for (CSSParserValue* value = m_valueList->current(); value; value = m_valueList->next()) {
switch (value->id) {
case CSSValueOver:
if (foundOverOrUnder)
return false;
foundOverOrUnder = true;
overUnderValueID = CSSValueOver;
break;
case CSSValueUnder:
if (foundOverOrUnder)
return false;
foundOverOrUnder = true;
overUnderValueID = CSSValueUnder;
break;
case CSSValueLeft:
if (foundLeftOrRight)
return false;
foundLeftOrRight = true;
leftRightValueID = CSSValueLeft;
break;
case CSSValueRight:
if (foundLeftOrRight)
return false;
foundLeftOrRight = true;
leftRightValueID = CSSValueRight;
break;
default:
return false;
}
}
if (!foundOverOrUnder)
return false;
RefPtr<CSSValueList> list = CSSValueList::createSpaceSeparated();
list->append(cssValuePool().createIdentifierValue(overUnderValueID));
if (foundLeftOrRight)
list->append(cssValuePool().createIdentifierValue(leftRightValueID));
addProperty(CSSPropertyWebkitTextEmphasisPosition, list, important);
return true;
}
PassRefPtr<CSSValue> CSSParser::parseTextIndent()
{
// <length> | <percentage> | inherit when CSS3_TEXT is disabled.
// [ <length> | <percentage> ] && [ -webkit-hanging || -webkit-each-line ]? | inherit when CSS3_TEXT is enabled.
RefPtr<CSSValueList> list = CSSValueList::createSpaceSeparated();
bool hasLengthOrPercentage = false;
#if ENABLE(CSS3_TEXT)
bool hasEachLine = false;
bool hasHanging = false;
#endif
CSSParserValue* value = m_valueList->current();
while (value) {
if (!hasLengthOrPercentage && validUnit(value, FLength | FPercent)) {
list->append(createPrimitiveNumericValue(value));
hasLengthOrPercentage = true;
}
#if ENABLE(CSS3_TEXT)
else if (!hasEachLine && value->id == CSSValueWebkitEachLine) {
list->append(cssValuePool().createIdentifierValue(CSSValueWebkitEachLine));
hasEachLine = true;
} else if (!hasHanging && value->id == CSSValueWebkitHanging) {
list->append(cssValuePool().createIdentifierValue(CSSValueWebkitHanging));
hasHanging = true;
}
#endif
else
return 0;
value = m_valueList->next();
}
if (!hasLengthOrPercentage)
return 0;
return list.release();
}
bool CSSParser::parseLineBoxContain(bool important)
{
LineBoxContain lineBoxContain = LineBoxContainNone;
for (CSSParserValue* value = m_valueList->current(); value; value = m_valueList->next()) {
if (value->id == CSSValueBlock) {
if (lineBoxContain & LineBoxContainBlock)
return false;
lineBoxContain |= LineBoxContainBlock;
} else if (value->id == CSSValueInline) {
if (lineBoxContain & LineBoxContainInline)
return false;
lineBoxContain |= LineBoxContainInline;
} else if (value->id == CSSValueFont) {
if (lineBoxContain & LineBoxContainFont)
return false;
lineBoxContain |= LineBoxContainFont;
} else if (value->id == CSSValueGlyphs) {
if (lineBoxContain & LineBoxContainGlyphs)
return false;
lineBoxContain |= LineBoxContainGlyphs;
} else if (value->id == CSSValueReplaced) {
if (lineBoxContain & LineBoxContainReplaced)
return false;
lineBoxContain |= LineBoxContainReplaced;
} else if (value->id == CSSValueInlineBox) {
if (lineBoxContain & LineBoxContainInlineBox)
return false;
lineBoxContain |= LineBoxContainInlineBox;
} else if (value->id == CSSValueInitialLetter) {
if (lineBoxContain & LineBoxContainInitialLetter)
return false;
lineBoxContain |= LineBoxContainInitialLetter;
} else
return false;
}
if (!lineBoxContain)
return false;
addProperty(CSSPropertyWebkitLineBoxContain, CSSLineBoxContainValue::create(lineBoxContain), important);
return true;
}
bool CSSParser::parseFontFeatureTag(CSSValueList* settings)
{
// Feature tag name consists of 4-letter characters.
static const unsigned tagNameLength = 4;
CSSParserValue* value = m_valueList->current();
// Feature tag name comes first
if (value->unit != CSSPrimitiveValue::CSS_STRING)
return false;
if (value->string.length() != tagNameLength)
return false;
for (unsigned i = 0; i < tagNameLength; ++i) {
// Limits the range of characters to 0x20-0x7E, following the tag name rules defiend in the OpenType specification.
UChar character = value->string[i];
if (character < 0x20 || character > 0x7E)
return false;
}
String tag = value->string;
int tagValue = 1;
// Feature tag values could follow: <integer> | on | off
value = m_valueList->next();
if (value) {
if (value->unit == CSSPrimitiveValue::CSS_NUMBER && value->isInt && value->fValue >= 0) {
tagValue = clampToInteger(value->fValue);
if (tagValue < 0)
return false;
m_valueList->next();
} else if (value->id == CSSValueOn || value->id == CSSValueOff) {
tagValue = value->id == CSSValueOn;
m_valueList->next();
}
}
settings->append(CSSFontFeatureValue::create(tag, tagValue));
return true;
}
bool CSSParser::parseFontFeatureSettings(bool important)
{
if (m_valueList->size() == 1 && m_valueList->current()->id == CSSValueNormal) {
RefPtr<CSSPrimitiveValue> normalValue = cssValuePool().createIdentifierValue(CSSValueNormal);
m_valueList->next();
addProperty(CSSPropertyWebkitFontFeatureSettings, normalValue.release(), important);
return true;
}
RefPtr<CSSValueList> settings = CSSValueList::createCommaSeparated();
for (CSSParserValue* value = m_valueList->current(); value; value = m_valueList->next()) {
if (!parseFontFeatureTag(settings.get()))
return false;
// If the list isn't parsed fully, the current value should be comma.
value = m_valueList->current();
if (value && !isComma(value))
return false;
}
if (settings->length()) {
addProperty(CSSPropertyWebkitFontFeatureSettings, settings.release(), important);
return true;
}
return false;
}
bool CSSParser::parseFontVariantLigatures(bool important)
{
RefPtr<CSSValueList> ligatureValues = CSSValueList::createSpaceSeparated();
bool sawCommonLigaturesValue = false;
bool sawDiscretionaryLigaturesValue = false;
bool sawHistoricalLigaturesValue = false;
for (CSSParserValue* value = m_valueList->current(); value; value = m_valueList->next()) {
if (value->unit != CSSPrimitiveValue::CSS_IDENT)
return false;
switch (value->id) {
case CSSValueNoCommonLigatures:
case CSSValueCommonLigatures:
if (sawCommonLigaturesValue)
return false;
sawCommonLigaturesValue = true;
ligatureValues->append(cssValuePool().createIdentifierValue(value->id));
break;
case CSSValueNoDiscretionaryLigatures:
case CSSValueDiscretionaryLigatures:
if (sawDiscretionaryLigaturesValue)
return false;
sawDiscretionaryLigaturesValue = true;
ligatureValues->append(cssValuePool().createIdentifierValue(value->id));
break;
case CSSValueNoHistoricalLigatures:
case CSSValueHistoricalLigatures:
if (sawHistoricalLigaturesValue)
return false;
sawHistoricalLigaturesValue = true;
ligatureValues->append(cssValuePool().createIdentifierValue(value->id));
break;
default:
return false;
}
}
if (!ligatureValues->length())
return false;
addProperty(CSSPropertyWebkitFontVariantLigatures, ligatureValues.release(), important);
return true;
}
bool CSSParser::parseCalculation(CSSParserValue* value, CalculationPermittedValueRange range)
{
ASSERT(isCalculation(value));
CSSParserValueList* args = value->function->args.get();
if (!args || !args->size())
return false;
ASSERT(!m_parsedCalculation);
m_parsedCalculation = CSSCalcValue::create(value->function->name, *args, range);
if (!m_parsedCalculation)
return false;
return true;
}
#define END_TOKEN 0
#include "CSSGrammar.h"
enum CharacterType {
// Types for the main switch.
// The first 4 types must be grouped together, as they
// represent the allowed chars in an identifier.
CharacterCaselessU,
CharacterIdentifierStart,
CharacterNumber,
CharacterDash,
CharacterOther,
CharacterNull,
CharacterWhiteSpace,
CharacterEndConditionQuery,
CharacterEndNthChild,
CharacterQuote,
CharacterExclamationMark,
CharacterHashmark,
CharacterDollar,
CharacterAsterisk,
CharacterPlus,
CharacterDot,
CharacterSlash,
CharacterLess,
CharacterAt,
CharacterBackSlash,
CharacterXor,
CharacterVerticalBar,
CharacterTilde,
};
// 128 ASCII codes
static const CharacterType typesOfASCIICharacters[128] = {
/* 0 - Null */ CharacterNull,
/* 1 - Start of Heading */ CharacterOther,
/* 2 - Start of Text */ CharacterOther,
/* 3 - End of Text */ CharacterOther,
/* 4 - End of Transm. */ CharacterOther,
/* 5 - Enquiry */ CharacterOther,
/* 6 - Acknowledgment */ CharacterOther,
/* 7 - Bell */ CharacterOther,
/* 8 - Back Space */ CharacterOther,
/* 9 - Horizontal Tab */ CharacterWhiteSpace,
/* 10 - Line Feed */ CharacterWhiteSpace,
/* 11 - Vertical Tab */ CharacterOther,
/* 12 - Form Feed */ CharacterWhiteSpace,
/* 13 - Carriage Return */ CharacterWhiteSpace,
/* 14 - Shift Out */ CharacterOther,
/* 15 - Shift In */ CharacterOther,
/* 16 - Data Line Escape */ CharacterOther,
/* 17 - Device Control 1 */ CharacterOther,
/* 18 - Device Control 2 */ CharacterOther,
/* 19 - Device Control 3 */ CharacterOther,
/* 20 - Device Control 4 */ CharacterOther,
/* 21 - Negative Ack. */ CharacterOther,
/* 22 - Synchronous Idle */ CharacterOther,
/* 23 - End of Transmit */ CharacterOther,
/* 24 - Cancel */ CharacterOther,
/* 25 - End of Medium */ CharacterOther,
/* 26 - Substitute */ CharacterOther,
/* 27 - Escape */ CharacterOther,
/* 28 - File Separator */ CharacterOther,
/* 29 - Group Separator */ CharacterOther,
/* 30 - Record Separator */ CharacterOther,
/* 31 - Unit Separator */ CharacterOther,
/* 32 - Space */ CharacterWhiteSpace,
/* 33 - ! */ CharacterExclamationMark,
/* 34 - " */ CharacterQuote,
/* 35 - # */ CharacterHashmark,
/* 36 - $ */ CharacterDollar,
/* 37 - % */ CharacterOther,
/* 38 - & */ CharacterOther,
/* 39 - ' */ CharacterQuote,
/* 40 - ( */ CharacterOther,
/* 41 - ) */ CharacterEndNthChild,
/* 42 - * */ CharacterAsterisk,
/* 43 - + */ CharacterPlus,
/* 44 - , */ CharacterOther,
/* 45 - - */ CharacterDash,
/* 46 - . */ CharacterDot,
/* 47 - / */ CharacterSlash,
/* 48 - 0 */ CharacterNumber,
/* 49 - 1 */ CharacterNumber,
/* 50 - 2 */ CharacterNumber,
/* 51 - 3 */ CharacterNumber,
/* 52 - 4 */ CharacterNumber,
/* 53 - 5 */ CharacterNumber,
/* 54 - 6 */ CharacterNumber,
/* 55 - 7 */ CharacterNumber,
/* 56 - 8 */ CharacterNumber,
/* 57 - 9 */ CharacterNumber,
/* 58 - : */ CharacterOther,
/* 59 - ; */ CharacterEndConditionQuery,
/* 60 - < */ CharacterLess,
/* 61 - = */ CharacterOther,
/* 62 - > */ CharacterOther,
/* 63 - ? */ CharacterOther,
/* 64 - @ */ CharacterAt,
/* 65 - A */ CharacterIdentifierStart,
/* 66 - B */ CharacterIdentifierStart,
/* 67 - C */ CharacterIdentifierStart,
/* 68 - D */ CharacterIdentifierStart,
/* 69 - E */ CharacterIdentifierStart,
/* 70 - F */ CharacterIdentifierStart,
/* 71 - G */ CharacterIdentifierStart,
/* 72 - H */ CharacterIdentifierStart,
/* 73 - I */ CharacterIdentifierStart,
/* 74 - J */ CharacterIdentifierStart,
/* 75 - K */ CharacterIdentifierStart,
/* 76 - L */ CharacterIdentifierStart,
/* 77 - M */ CharacterIdentifierStart,
/* 78 - N */ CharacterIdentifierStart,
/* 79 - O */ CharacterIdentifierStart,
/* 80 - P */ CharacterIdentifierStart,
/* 81 - Q */ CharacterIdentifierStart,
/* 82 - R */ CharacterIdentifierStart,
/* 83 - S */ CharacterIdentifierStart,
/* 84 - T */ CharacterIdentifierStart,
/* 85 - U */ CharacterCaselessU,
/* 86 - V */ CharacterIdentifierStart,
/* 87 - W */ CharacterIdentifierStart,
/* 88 - X */ CharacterIdentifierStart,
/* 89 - Y */ CharacterIdentifierStart,
/* 90 - Z */ CharacterIdentifierStart,
/* 91 - [ */ CharacterOther,
/* 92 - \ */ CharacterBackSlash,
/* 93 - ] */ CharacterOther,
/* 94 - ^ */ CharacterXor,
/* 95 - _ */ CharacterIdentifierStart,
/* 96 - ` */ CharacterOther,
/* 97 - a */ CharacterIdentifierStart,
/* 98 - b */ CharacterIdentifierStart,
/* 99 - c */ CharacterIdentifierStart,
/* 100 - d */ CharacterIdentifierStart,
/* 101 - e */ CharacterIdentifierStart,
/* 102 - f */ CharacterIdentifierStart,
/* 103 - g */ CharacterIdentifierStart,
/* 104 - h */ CharacterIdentifierStart,
/* 105 - i */ CharacterIdentifierStart,
/* 106 - j */ CharacterIdentifierStart,
/* 107 - k */ CharacterIdentifierStart,
/* 108 - l */ CharacterIdentifierStart,
/* 109 - m */ CharacterIdentifierStart,
/* 110 - n */ CharacterIdentifierStart,
/* 111 - o */ CharacterIdentifierStart,
/* 112 - p */ CharacterIdentifierStart,
/* 113 - q */ CharacterIdentifierStart,
/* 114 - r */ CharacterIdentifierStart,
/* 115 - s */ CharacterIdentifierStart,
/* 116 - t */ CharacterIdentifierStart,
/* 117 - u */ CharacterCaselessU,
/* 118 - v */ CharacterIdentifierStart,
/* 119 - w */ CharacterIdentifierStart,
/* 120 - x */ CharacterIdentifierStart,
/* 121 - y */ CharacterIdentifierStart,
/* 122 - z */ CharacterIdentifierStart,
/* 123 - { */ CharacterEndConditionQuery,
/* 124 - | */ CharacterVerticalBar,
/* 125 - } */ CharacterOther,
/* 126 - ~ */ CharacterTilde,
/* 127 - Delete */ CharacterOther,
};
// Utility functions for the CSS tokenizer.
template <typename CharacterType>
static inline bool isCSSLetter(CharacterType character)
{
return character >= 128 || typesOfASCIICharacters[character] <= CharacterDash;
}
template <typename CharacterType>
static inline bool isCSSEscape(CharacterType character)
{
return character >= ' ' && character != 127;
}
template <typename CharacterType>
static inline bool isURILetter(CharacterType character)
{
return (character >= '*' && character != 127) || (character >= '#' && character <= '&') || character == '!';
}
template <typename CharacterType>
static inline bool isIdentifierStartAfterDash(CharacterType* currentCharacter)
{
return isASCIIAlpha(currentCharacter[0]) || currentCharacter[0] == '_' || currentCharacter[0] >= 128
|| (currentCharacter[0] == '\\' && isCSSEscape(currentCharacter[1]));
}
template <typename CharacterType>
static inline bool isEqualToCSSIdentifier(CharacterType* cssString, const char* constantString)
{
// Compare an character memory data with a zero terminated string.
do {
// The input must be part of an identifier if constantChar or constString
// contains '-'. Otherwise toASCIILowerUnchecked('\r') would be equal to '-'.
ASSERT((*constantString >= 'a' && *constantString <= 'z') || *constantString == '-');
ASSERT(*constantString != '-' || isCSSLetter(*cssString));
if (toASCIILowerUnchecked(*cssString++) != (*constantString++))
return false;
} while (*constantString);
return true;
}
template <typename CharacterType>
static inline bool isEqualToCSSCaseSensitiveIdentifier(CharacterType* string, const char* constantString)
{
do {
if (*string++ != *constantString++)
return false;
} while (*constantString);
return true;
}
template <typename CharacterType>
static CharacterType* checkAndSkipEscape(CharacterType* currentCharacter)
{
// Returns with 0, if escape check is failed. Otherwise
// it returns with the following character.
ASSERT(*currentCharacter == '\\');
++currentCharacter;
if (!isCSSEscape(*currentCharacter))
return 0;
if (isASCIIHexDigit(*currentCharacter)) {
int length = 6;
do {
++currentCharacter;
} while (isASCIIHexDigit(*currentCharacter) && --length);
// Optional space after the escape sequence.
if (isHTMLSpace(*currentCharacter))
++currentCharacter;
return currentCharacter;
}
return currentCharacter + 1;
}
template <typename CharacterType>
static inline CharacterType* skipWhiteSpace(CharacterType* currentCharacter)
{
while (isHTMLSpace(*currentCharacter))
++currentCharacter;
return currentCharacter;
}
// Main CSS tokenizer functions.
template <>
LChar* CSSParserString::characters<LChar>() const { return characters8(); }
template <>
UChar* CSSParserString::characters<UChar>() const { return characters16(); }
template <>
inline LChar*& CSSParser::currentCharacter<LChar>()
{
return m_currentCharacter8;
}
template <>
inline UChar*& CSSParser::currentCharacter<UChar>()
{
return m_currentCharacter16;
}
UChar*& CSSParser::currentCharacter16()
{
if (!m_currentCharacter16) {
m_dataStart16 = std::make_unique<UChar[]>(m_length);
m_currentCharacter16 = m_dataStart16.get();
}
return m_currentCharacter16;
}
template <>
inline LChar* CSSParser::tokenStart<LChar>()
{
return m_tokenStart.ptr8;
}
template <>
inline UChar* CSSParser::tokenStart<UChar>()
{
return m_tokenStart.ptr16;
}
CSSParser::Location CSSParser::currentLocation()
{
Location location;
location.lineNumber = m_tokenStartLineNumber;
if (is8BitSource())
location.token.init(tokenStart<LChar>(), currentCharacter<LChar>() - tokenStart<LChar>());
else
location.token.init(tokenStart<UChar>(), currentCharacter<UChar>() - tokenStart<UChar>());
return location;
}
template <typename CharacterType>
inline bool CSSParser::isIdentifierStart()
{
// Check whether an identifier is started.
return isIdentifierStartAfterDash((*currentCharacter<CharacterType>() != '-') ? currentCharacter<CharacterType>() : currentCharacter<CharacterType>() + 1);
}
template <typename CharacterType>
static inline CharacterType* checkAndSkipString(CharacterType* currentCharacter, int quote)
{
// Returns with 0, if string check is failed. Otherwise
// it returns with the following character. This is necessary
// since we cannot revert escape sequences, thus strings
// must be validated before parsing.
while (true) {
if (UNLIKELY(*currentCharacter == quote)) {
// String parsing is successful.
return currentCharacter + 1;
}
if (UNLIKELY(!*currentCharacter)) {
// String parsing is successful up to end of input.
return currentCharacter;
}
if (UNLIKELY(*currentCharacter <= '\r' && (*currentCharacter == '\n' || (*currentCharacter | 0x1) == '\r'))) {
// String parsing is failed for character '\n', '\f' or '\r'.
return 0;
}
if (LIKELY(currentCharacter[0] != '\\'))
++currentCharacter;
else if (currentCharacter[1] == '\n' || currentCharacter[1] == '\f')
currentCharacter += 2;
else if (currentCharacter[1] == '\r')
currentCharacter += currentCharacter[2] == '\n' ? 3 : 2;
else {
currentCharacter = checkAndSkipEscape(currentCharacter);
if (!currentCharacter)
return 0;
}
}
}
template <typename CharacterType>
unsigned CSSParser::parseEscape(CharacterType*& src)
{
ASSERT(*src == '\\' && isCSSEscape(src[1]));
unsigned unicode = 0;
++src;
if (isASCIIHexDigit(*src)) {
int length = 6;
do {
unicode = (unicode << 4) + toASCIIHexValue(*src++);
} while (--length && isASCIIHexDigit(*src));
// Characters above 0x10ffff are not handled.
if (unicode > 0x10ffff)
unicode = 0xfffd;
// Optional space after the escape sequence.
if (isHTMLSpace(*src))
++src;
return unicode;
}
return *currentCharacter<CharacterType>()++;
}
template <>
inline void CSSParser::UnicodeToChars<LChar>(LChar*& result, unsigned unicode)
{
ASSERT(unicode <= 0xff);
*result = unicode;
++result;
}
template <>
inline void CSSParser::UnicodeToChars<UChar>(UChar*& result, unsigned unicode)
{
// Replace unicode with a surrogate pairs when it is bigger than 0xffff
if (U16_LENGTH(unicode) == 2) {
*result++ = U16_LEAD(unicode);
*result = U16_TRAIL(unicode);
} else
*result = unicode;
++result;
}
template <typename SrcCharacterType, typename DestCharacterType>
inline bool CSSParser::parseIdentifierInternal(SrcCharacterType*& src, DestCharacterType*& result, bool& hasEscape)
{
hasEscape = false;
do {
if (LIKELY(*src != '\\'))
*result++ = *src++;
else {
hasEscape = true;
SrcCharacterType* savedEscapeStart = src;
unsigned unicode = parseEscape<SrcCharacterType>(src);
if (unicode > 0xff && sizeof(DestCharacterType) == 1) {
src = savedEscapeStart;
return false;
}
UnicodeToChars(result, unicode);
}
} while (isCSSLetter(src[0]) || (src[0] == '\\' && isCSSEscape(src[1])));
return true;
}
template <typename CharacterType>
inline void CSSParser::parseIdentifier(CharacterType*& result, CSSParserString& resultString, bool& hasEscape)
{
// If a valid identifier start is found, we can safely
// parse the identifier until the next invalid character.
ASSERT(isIdentifierStart<CharacterType>());
CharacterType* start = currentCharacter<CharacterType>();
if (UNLIKELY(!parseIdentifierInternal(currentCharacter<CharacterType>(), result, hasEscape))) {
// Found an escape we couldn't handle with 8 bits, copy what has been recognized and continue
ASSERT(is8BitSource());
UChar*& result16 = currentCharacter16();
UChar* start16 = result16;
int i = 0;
for (; i < result - start; i++)
result16[i] = start[i];
result16 += i;
parseIdentifierInternal(currentCharacter<CharacterType>(), result16, hasEscape);
result += result16 - start16;
resultString.init(start16, result16 - start16);
return;
}
resultString.init(start, result - start);
}
template <typename SrcCharacterType, typename DestCharacterType>
inline bool CSSParser::parseStringInternal(SrcCharacterType*& src, DestCharacterType*& result, UChar quote)
{
while (true) {
if (UNLIKELY(*src == quote)) {
// String parsing is done.
++src;
return true;
}
if (UNLIKELY(!*src)) {
// String parsing is done, but don't advance pointer if at the end of input.
return true;
}
ASSERT(*src > '\r' || (*src < '\n' && *src) || *src == '\v');
if (LIKELY(src[0] != '\\'))
*result++ = *src++;
else if (src[1] == '\n' || src[1] == '\f')
src += 2;
else if (src[1] == '\r')
src += src[2] == '\n' ? 3 : 2;
else {
SrcCharacterType* savedEscapeStart = src;
unsigned unicode = parseEscape<SrcCharacterType>(src);
if (unicode > 0xff && sizeof(DestCharacterType) == 1) {
src = savedEscapeStart;
return false;
}
UnicodeToChars(result, unicode);
}
}
return true;
}
template <typename CharacterType>
inline void CSSParser::parseString(CharacterType*& result, CSSParserString& resultString, UChar quote)
{
CharacterType* start = currentCharacter<CharacterType>();
if (UNLIKELY(!parseStringInternal(currentCharacter<CharacterType>(), result, quote))) {
// Found an escape we couldn't handle with 8 bits, copy what has been recognized and continue
ASSERT(is8BitSource());
UChar*& result16 = currentCharacter16();
UChar* start16 = result16;
int i = 0;
for (; i < result - start; i++)
result16[i] = start[i];
result16 += i;
parseStringInternal(currentCharacter<CharacterType>(), result16, quote);
resultString.init(start16, result16 - start16);
return;
}
resultString.init(start, result - start);
}
template <typename CharacterType>
inline bool CSSParser::findURI(CharacterType*& start, CharacterType*& end, UChar& quote)
{
start = skipWhiteSpace(currentCharacter<CharacterType>());
if (*start == '"' || *start == '\'') {
quote = *start++;
end = checkAndSkipString(start, quote);
if (!end)
return false;
} else {
quote = 0;
end = start;
while (isURILetter(*end)) {
if (LIKELY(*end != '\\'))
++end;
else {
end = checkAndSkipEscape(end);
if (!end)
return false;
}
}
}
end = skipWhiteSpace(end);
if (*end != ')')
return false;
return true;
}
template <typename SrcCharacterType, typename DestCharacterType>
inline bool CSSParser::parseURIInternal(SrcCharacterType*& src, DestCharacterType*& dest, UChar quote)
{
if (quote) {
ASSERT(quote == '"' || quote == '\'');
return parseStringInternal(src, dest, quote);
}
while (isURILetter(*src)) {
if (LIKELY(*src != '\\'))
*dest++ = *src++;
else {
unsigned unicode = parseEscape<SrcCharacterType>(src);
if (unicode > 0xff && sizeof(SrcCharacterType) == 1)
return false;
UnicodeToChars(dest, unicode);
}
}
return true;
}
template <typename CharacterType>
inline void CSSParser::parseURI(CSSParserString& string)
{
CharacterType* uriStart;
CharacterType* uriEnd;
UChar quote;
if (!findURI(uriStart, uriEnd, quote))
return;
CharacterType* dest = currentCharacter<CharacterType>() = uriStart;
if (LIKELY(parseURIInternal(currentCharacter<CharacterType>(), dest, quote)))
string.init(uriStart, dest - uriStart);
else {
// An escape sequence was encountered that can't be stored in 8 bits.
// Reset the current character to the start of the URI and re-parse with
// a 16-bit destination.
ASSERT(is8BitSource());
UChar* uriStart16 = currentCharacter16();
currentCharacter<CharacterType>() = uriStart;
bool result = parseURIInternal(currentCharacter<CharacterType>(), currentCharacter16(), quote);
ASSERT_UNUSED(result, result);
string.init(uriStart16, currentCharacter16() - uriStart16);
}
currentCharacter<CharacterType>() = uriEnd + 1;
m_token = URI;
}
template <typename CharacterType>
inline bool CSSParser::parseUnicodeRange()
{
CharacterType* character = currentCharacter<CharacterType>() + 1;
int length = 6;
ASSERT(*currentCharacter<CharacterType>() == '+');
while (isASCIIHexDigit(*character) && length) {
++character;
--length;
}
if (length && *character == '?') {
// At most 5 hex digit followed by a question mark.
do {
++character;
--length;
} while (*character == '?' && length);
currentCharacter<CharacterType>() = character;
return true;
}
if (length < 6) {
// At least one hex digit.
if (character[0] == '-' && isASCIIHexDigit(character[1])) {
// Followed by a dash and a hex digit.
++character;
length = 6;
do {
++character;
} while (--length && isASCIIHexDigit(*character));
}
currentCharacter<CharacterType>() = character;
return true;
}
return false;
}
template <typename CharacterType>
bool CSSParser::parseNthChild()
{
CharacterType* character = currentCharacter<CharacterType>();
while (isASCIIDigit(*character))
++character;
if (isASCIIAlphaCaselessEqual(*character, 'n')) {
currentCharacter<CharacterType>() = character + 1;
return true;
}
return false;
}
template <typename CharacterType>
bool CSSParser::parseNthChildExtra()
{
CharacterType* character = skipWhiteSpace(currentCharacter<CharacterType>());
if (*character != '+' && *character != '-')
return false;
character = skipWhiteSpace(character + 1);
if (!isASCIIDigit(*character))
return false;
do {
++character;
} while (isASCIIDigit(*character));
currentCharacter<CharacterType>() = character;
return true;
}
template <typename CharacterType>
inline bool CSSParser::detectFunctionTypeToken(int length)
{
ASSERT(length > 0);
CharacterType* name = tokenStart<CharacterType>();
switch (length) {
case 3:
if (isASCIIAlphaCaselessEqual(name[0], 'n') && isASCIIAlphaCaselessEqual(name[1], 'o') && isASCIIAlphaCaselessEqual(name[2], 't')) {
m_token = NOTFUNCTION;
return true;
}
if (isASCIIAlphaCaselessEqual(name[0], 'u') && isASCIIAlphaCaselessEqual(name[1], 'r') && isASCIIAlphaCaselessEqual(name[2], 'l')) {
m_token = URI;
return true;
}
#if ENABLE(VIDEO_TRACK)
if (isASCIIAlphaCaselessEqual(name[0], 'c') && isASCIIAlphaCaselessEqual(name[1], 'u') && isASCIIAlphaCaselessEqual(name[2], 'e')) {
m_token = CUEFUNCTION;
return true;
}
#endif
return false;
case 4:
if (isEqualToCSSIdentifier(name, "calc")) {
m_token = CALCFUNCTION;
return true;
}
return false;
#if ENABLE(CSS_SELECTORS_LEVEL4)
case 7:
if (isEqualToCSSIdentifier(name, "matches")) {
m_token = MATCHESFUNCTION;
return true;
}
return false;
#endif
case 9:
if (isEqualToCSSIdentifier(name, "nth-child")) {
m_token = NTHCHILDFUNCTION;
m_parsingMode = NthChildMode;
return true;
}
return false;
case 11:
if (isEqualToCSSIdentifier(name, "nth-of-type")) {
m_parsingMode = NthChildMode;
return true;
}
return false;
case 14:
if (isEqualToCSSIdentifier(name, "nth-last-child")) {
m_parsingMode = NthChildMode;
return true;
}
return false;
case 16:
if (isEqualToCSSIdentifier(name, "nth-last-of-type")) {
m_parsingMode = NthChildMode;
return true;
}
return false;
}
return false;
}
template <typename CharacterType>
inline void CSSParser::detectMediaQueryToken(int length)
{
ASSERT(m_parsingMode == MediaQueryMode);
CharacterType* name = tokenStart<CharacterType>();
if (length == 3) {
if (isASCIIAlphaCaselessEqual(name[0], 'a') && isASCIIAlphaCaselessEqual(name[1], 'n') && isASCIIAlphaCaselessEqual(name[2], 'd'))
m_token = MEDIA_AND;
else if (isASCIIAlphaCaselessEqual(name[0], 'n') && isASCIIAlphaCaselessEqual(name[1], 'o') && isASCIIAlphaCaselessEqual(name[2], 't'))
m_token = MEDIA_NOT;
} else if (length == 4) {
if (isASCIIAlphaCaselessEqual(name[0], 'o') && isASCIIAlphaCaselessEqual(name[1], 'n')
&& isASCIIAlphaCaselessEqual(name[2], 'l') && isASCIIAlphaCaselessEqual(name[3], 'y'))
m_token = MEDIA_ONLY;
}
}
template <typename CharacterType>
inline void CSSParser::detectNumberToken(CharacterType* type, int length)
{
ASSERT(length > 0);
switch (toASCIILowerUnchecked(type[0])) {
case 'c':
if (length == 2 && isASCIIAlphaCaselessEqual(type[1], 'm'))
m_token = CMS;
else if (length == 2 && isASCIIAlphaCaselessEqual(type[1], 'h'))
m_token = CHS;
return;
case 'd':
if (length == 3 && isASCIIAlphaCaselessEqual(type[1], 'e') && isASCIIAlphaCaselessEqual(type[2], 'g'))
m_token = DEGS;
#if ENABLE(CSS_IMAGE_RESOLUTION) || ENABLE(RESOLUTION_MEDIA_QUERY)
else if (length > 2 && isASCIIAlphaCaselessEqual(type[1], 'p')) {
if (length == 4) {
// There is a discussion about the name of this unit on www-style.
// Keep this compile time guard in place until that is resolved.
// http://lists.w3.org/Archives/Public/www-style/2012May/0915.html
if (isASCIIAlphaCaselessEqual(type[2], 'p') && isASCIIAlphaCaselessEqual(type[3], 'x'))
m_token = DPPX;
else if (isASCIIAlphaCaselessEqual(type[2], 'c') && isASCIIAlphaCaselessEqual(type[3], 'm'))
m_token = DPCM;
} else if (length == 3 && isASCIIAlphaCaselessEqual(type[2], 'i'))
m_token = DPI;
}
#endif
return;
case 'e':
if (length == 2) {
if (isASCIIAlphaCaselessEqual(type[1], 'm'))
m_token = EMS;
else if (isASCIIAlphaCaselessEqual(type[1], 'x'))
m_token = EXS;
}
return;
case 'f':
if (length == 2 && isASCIIAlphaCaselessEqual(type[1], 'r'))
m_token = FR;
return;
case 'g':
if (length == 4 && isASCIIAlphaCaselessEqual(type[1], 'r')
&& isASCIIAlphaCaselessEqual(type[2], 'a') && isASCIIAlphaCaselessEqual(type[3], 'd'))
m_token = GRADS;
return;
case 'h':
if (length == 2 && isASCIIAlphaCaselessEqual(type[1], 'z'))
m_token = HERTZ;
return;
case 'i':
if (length == 2 && isASCIIAlphaCaselessEqual(type[1], 'n'))
m_token = INS;
return;
case 'k':
if (length == 3 && isASCIIAlphaCaselessEqual(type[1], 'h') && isASCIIAlphaCaselessEqual(type[2], 'z'))
m_token = KHERTZ;
return;
case 'm':
if (length == 2) {
if (isASCIIAlphaCaselessEqual(type[1], 'm'))
m_token = MMS;
else if (isASCIIAlphaCaselessEqual(type[1], 's'))
m_token = MSECS;
}
return;
case 'p':
if (length == 2) {
if (isASCIIAlphaCaselessEqual(type[1], 'x'))
m_token = PXS;
else if (isASCIIAlphaCaselessEqual(type[1], 't'))
m_token = PTS;
else if (isASCIIAlphaCaselessEqual(type[1], 'c'))
m_token = PCS;
}
return;
case 'r':
if (length == 3) {
if (isASCIIAlphaCaselessEqual(type[1], 'a') && isASCIIAlphaCaselessEqual(type[2], 'd'))
m_token = RADS;
else if (isASCIIAlphaCaselessEqual(type[1], 'e') && isASCIIAlphaCaselessEqual(type[2], 'm'))
m_token = REMS;
}
return;
case 's':
if (length == 1)
m_token = SECS;
return;
case 't':
if (length == 4 && isASCIIAlphaCaselessEqual(type[1], 'u')
&& isASCIIAlphaCaselessEqual(type[2], 'r') && isASCIIAlphaCaselessEqual(type[3], 'n'))
m_token = TURNS;
return;
case 'v':
if (length == 2) {
if (isASCIIAlphaCaselessEqual(type[1], 'w'))
m_token = VW;
else if (isASCIIAlphaCaselessEqual(type[1], 'h'))
m_token = VH;
} else if (length == 4 && isASCIIAlphaCaselessEqual(type[1], 'm')) {
if (isASCIIAlphaCaselessEqual(type[2], 'i') && isASCIIAlphaCaselessEqual(type[3], 'n'))
m_token = VMIN;
else if (isASCIIAlphaCaselessEqual(type[2], 'a') && isASCIIAlphaCaselessEqual(type[3], 'x'))
m_token = VMAX;
}
return;
default:
if (type[0] == '_' && length == 5 && type[1] == '_' && isASCIIAlphaCaselessEqual(type[2], 'q')
&& isASCIIAlphaCaselessEqual(type[3], 'e') && isASCIIAlphaCaselessEqual(type[4], 'm'))
m_token = QEMS;
return;
}
}
template <typename CharacterType>
inline void CSSParser::detectDashToken(int length)
{
CharacterType* name = tokenStart<CharacterType>();
if (length == 11) {
if (isASCIIAlphaCaselessEqual(name[10], 'y') && isEqualToCSSIdentifier(name + 1, "webkit-an"))
m_token = ANYFUNCTION;
else if (isASCIIAlphaCaselessEqual(name[10], 'n') && isEqualToCSSIdentifier(name + 1, "webkit-mi"))
m_token = MINFUNCTION;
else if (isASCIIAlphaCaselessEqual(name[10], 'x') && isEqualToCSSIdentifier(name + 1, "webkit-ma"))
m_token = MAXFUNCTION;
} else if (length == 12 && isEqualToCSSIdentifier(name + 1, "webkit-calc"))
m_token = CALCFUNCTION;
}
template <typename CharacterType>
inline void CSSParser::detectAtToken(int length, bool hasEscape)
{
CharacterType* name = tokenStart<CharacterType>();
ASSERT(name[0] == '@' && length >= 2);
// charset, font-face, import, media, namespace, page, supports,
// -webkit-keyframes, and -webkit-mediaquery are not affected by hasEscape.
switch (toASCIILowerUnchecked(name[1])) {
case 'b':
if (hasEscape)
return;
switch (length) {
case 12:
if (isEqualToCSSIdentifier(name + 2, "ottom-left"))
m_token = BOTTOMLEFT_SYM;
return;
case 13:
if (isEqualToCSSIdentifier(name + 2, "ottom-right"))
m_token = BOTTOMRIGHT_SYM;
return;
case 14:
if (isEqualToCSSIdentifier(name + 2, "ottom-center"))
m_token = BOTTOMCENTER_SYM;
return;
case 19:
if (isEqualToCSSIdentifier(name + 2, "ottom-left-corner"))
m_token = BOTTOMLEFTCORNER_SYM;
return;
case 20:
if (isEqualToCSSIdentifier(name + 2, "ottom-right-corner"))
m_token = BOTTOMRIGHTCORNER_SYM;
return;
}
return;
case 'c':
if (length == 8 && isEqualToCSSIdentifier(name + 2, "harset"))
m_token = CHARSET_SYM;
return;
case 'f':
if (length == 10 && isEqualToCSSIdentifier(name + 2, "ont-face"))
m_token = FONT_FACE_SYM;
return;
case 'i':
if (length == 7 && isEqualToCSSIdentifier(name + 2, "mport")) {
m_parsingMode = MediaQueryMode;
m_token = IMPORT_SYM;
}
return;
case 'l':
if (hasEscape)
return;
if (length == 9) {
if (isEqualToCSSIdentifier(name + 2, "eft-top"))
m_token = LEFTTOP_SYM;
} else if (length == 12) {
// Checking the last character first could further reduce the possibile cases.
if (isASCIIAlphaCaselessEqual(name[11], 'e') && isEqualToCSSIdentifier(name + 2, "eft-middl"))
m_token = LEFTMIDDLE_SYM;
else if (isASCIIAlphaCaselessEqual(name[11], 'm') && isEqualToCSSIdentifier(name + 2, "eft-botto"))
m_token = LEFTBOTTOM_SYM;
}
return;
case 'm':
if (length == 6 && isEqualToCSSIdentifier(name + 2, "edia")) {
m_parsingMode = MediaQueryMode;
m_token = MEDIA_SYM;
}
return;
case 'n':
if (length == 10 && isEqualToCSSIdentifier(name + 2, "amespace"))
m_token = NAMESPACE_SYM;
return;
case 'p':
if (length == 5 && isEqualToCSSIdentifier(name + 2, "age"))
m_token = PAGE_SYM;
return;
case 'r':
if (hasEscape)
return;
if (length == 10) {
if (isEqualToCSSIdentifier(name + 2, "ight-top"))
m_token = RIGHTTOP_SYM;
} else if (length == 13) {
// Checking the last character first could further reduce the possibile cases.
if (isASCIIAlphaCaselessEqual(name[12], 'e') && isEqualToCSSIdentifier(name + 2, "ight-middl"))
m_token = RIGHTMIDDLE_SYM;
else if (isASCIIAlphaCaselessEqual(name[12], 'm') && isEqualToCSSIdentifier(name + 2, "ight-botto"))
m_token = RIGHTBOTTOM_SYM;
}
return;
#if ENABLE(CSS3_CONDITIONAL_RULES)
case 's':
if (length == 9 && isEqualToCSSIdentifier(name + 2, "upports")) {
m_parsingMode = SupportsMode;
m_token = SUPPORTS_SYM;
}
return;
#endif
case 't':
if (hasEscape)
return;
switch (length) {
case 9:
if (isEqualToCSSIdentifier(name + 2, "op-left"))
m_token = TOPLEFT_SYM;
return;
case 10:
if (isEqualToCSSIdentifier(name + 2, "op-right"))
m_token = TOPRIGHT_SYM;
return;
case 11:
if (isEqualToCSSIdentifier(name + 2, "op-center"))
m_token = TOPCENTER_SYM;
return;
case 16:
if (isEqualToCSSIdentifier(name + 2, "op-left-corner"))
m_token = TOPLEFTCORNER_SYM;
return;
case 17:
if (isEqualToCSSIdentifier(name + 2, "op-right-corner"))
m_token = TOPRIGHTCORNER_SYM;
return;
}
return;
case '-':
switch (length) {
case 13:
if (!hasEscape && isEqualToCSSIdentifier(name + 2, "webkit-rule"))
m_token = WEBKIT_RULE_SYM;
return;
case 14:
if (hasEscape)
return;
// Checking the last character first could further reduce the possibile cases.
if (isASCIIAlphaCaselessEqual(name[13], 's') && isEqualToCSSIdentifier(name + 2, "webkit-decl"))
m_token = WEBKIT_DECLS_SYM;
else if (isASCIIAlphaCaselessEqual(name[13], 'e') && isEqualToCSSIdentifier(name + 2, "webkit-valu"))
m_token = WEBKIT_VALUE_SYM;
return;
case 15:
if (hasEscape)
return;
#if ENABLE(CSS_REGIONS)
if (isASCIIAlphaCaselessEqual(name[14], 'n') && isEqualToCSSIdentifier(name + 2, "webkit-regio"))
m_token = WEBKIT_REGION_RULE_SYM;
#endif
return;
case 17:
if (hasEscape)
return;
if (isASCIIAlphaCaselessEqual(name[16], 'r') && isEqualToCSSIdentifier(name + 2, "webkit-selecto"))
m_token = WEBKIT_SELECTOR_SYM;
#if ENABLE(CSS_DEVICE_ADAPTATION)
else if (isASCIIAlphaCaselessEqual(name[16], 't') && isEqualToCSSIdentifier(name + 2, "webkit-viewpor"))
m_token = WEBKIT_VIEWPORT_RULE_SYM;
#endif
return;
case 18:
if (isEqualToCSSIdentifier(name + 2, "webkit-keyframes"))
m_token = WEBKIT_KEYFRAMES_SYM;
#if ENABLE(PICTURE_SIZES)
else if (isEqualToCSSIdentifier(name + 2, "webkit-sizesattr"))
m_token = WEBKIT_SIZESATTR_SYM;
#endif
return;
case 19:
if (isEqualToCSSIdentifier(name + 2, "webkit-mediaquery")) {
m_parsingMode = MediaQueryMode;
m_token = WEBKIT_MEDIAQUERY_SYM;
}
return;
case 22:
if (!hasEscape && isEqualToCSSIdentifier(name + 2, "webkit-keyframe-rule"))
m_token = WEBKIT_KEYFRAME_RULE_SYM;
return;
case 27:
#if ENABLE(CSS3_CONDITIONAL_RULES)
if (isEqualToCSSIdentifier(name + 2, "webkit-supports-condition")) {
m_parsingMode = SupportsMode;
m_token = WEBKIT_SUPPORTS_CONDITION_SYM;
}
#endif
return;
}
}
}
#if ENABLE(CSS3_CONDITIONAL_RULES)
template <typename CharacterType>
inline void CSSParser::detectSupportsToken(int length)
{
ASSERT(m_parsingMode == SupportsMode);
CharacterType* name = tokenStart<CharacterType>();
if (length == 2) {
if (isASCIIAlphaCaselessEqual(name[0], 'o') && isASCIIAlphaCaselessEqual(name[1], 'r'))
m_token = SUPPORTS_OR;
} else if (length == 3) {
if (isASCIIAlphaCaselessEqual(name[0], 'a') && isASCIIAlphaCaselessEqual(name[1], 'n') && isASCIIAlphaCaselessEqual(name[2], 'd'))
m_token = SUPPORTS_AND;
else if (isASCIIAlphaCaselessEqual(name[0], 'n') && isASCIIAlphaCaselessEqual(name[1], 'o') && isASCIIAlphaCaselessEqual(name[2], 't'))
m_token = SUPPORTS_NOT;
}
}
#endif
template <typename SrcCharacterType>
int CSSParser::realLex(void* yylvalWithoutType)
{
YYSTYPE* yylval = static_cast<YYSTYPE*>(yylvalWithoutType);
// Write pointer for the next character.
SrcCharacterType* result;
CSSParserString resultString;
bool hasEscape;
// The input buffer is terminated by a \0 character, so
// it is safe to read one character ahead of a known non-null.
#ifndef NDEBUG
// In debug we check with an ASSERT that the length is > 0 for string types.
yylval->string.clear();
#endif
restartAfterComment:
result = currentCharacter<SrcCharacterType>();
setTokenStart(result);
m_tokenStartLineNumber = m_lineNumber;
m_token = *currentCharacter<SrcCharacterType>();
++currentCharacter<SrcCharacterType>();
switch ((m_token <= 127) ? typesOfASCIICharacters[m_token] : CharacterIdentifierStart) {
case CharacterCaselessU:
if (UNLIKELY(*currentCharacter<SrcCharacterType>() == '+')) {
if (parseUnicodeRange<SrcCharacterType>()) {
m_token = UNICODERANGE;
yylval->string.init(tokenStart<SrcCharacterType>(), currentCharacter<SrcCharacterType>() - tokenStart<SrcCharacterType>());
break;
}
}
FALLTHROUGH; // To CharacterIdentifierStart.
case CharacterIdentifierStart:
--currentCharacter<SrcCharacterType>();
parseIdentifier(result, yylval->string, hasEscape);
m_token = IDENT;
if (UNLIKELY(*currentCharacter<SrcCharacterType>() == '(')) {
#if ENABLE(CSS3_CONDITIONAL_RULES)
if (m_parsingMode == SupportsMode && !hasEscape) {
detectSupportsToken<SrcCharacterType>(result - tokenStart<SrcCharacterType>());
if (m_token != IDENT)
break;
}
#endif
m_token = FUNCTION;
bool shouldSkipParenthesis = true;
if (!hasEscape) {
bool detected = detectFunctionTypeToken<SrcCharacterType>(result - tokenStart<SrcCharacterType>());
if (!detected && m_parsingMode == MediaQueryMode) {
// ... and(max-width: 480px) ... looks like a function, but in fact it is not,
// so run more detection code in the MediaQueryMode.
detectMediaQueryToken<SrcCharacterType>(result - tokenStart<SrcCharacterType>());
shouldSkipParenthesis = false;
}
}
if (LIKELY(shouldSkipParenthesis)) {
++currentCharacter<SrcCharacterType>();
++result;
++yylval->string.m_length;
}
if (token() == URI) {
m_token = FUNCTION;
// Check whether it is really an URI.
if (yylval->string.is8Bit())
parseURI<LChar>(yylval->string);
else
parseURI<UChar>(yylval->string);
}
} else if (UNLIKELY(m_parsingMode != NormalMode) && !hasEscape) {
if (m_parsingMode == MediaQueryMode)
detectMediaQueryToken<SrcCharacterType>(result - tokenStart<SrcCharacterType>());
#if ENABLE(CSS3_CONDITIONAL_RULES)
else if (m_parsingMode == SupportsMode)
detectSupportsToken<SrcCharacterType>(result - tokenStart<SrcCharacterType>());
#endif
else if (m_parsingMode == NthChildMode && isASCIIAlphaCaselessEqual(tokenStart<SrcCharacterType>()[0], 'n')) {
if (result - tokenStart<SrcCharacterType>() == 1) {
// String "n" is IDENT but "n+1" is NTH.
if (parseNthChildExtra<SrcCharacterType>()) {
m_token = NTH;
yylval->string.m_length = currentCharacter<SrcCharacterType>() - tokenStart<SrcCharacterType>();
}
} else if (result - tokenStart<SrcCharacterType>() >= 2 && tokenStart<SrcCharacterType>()[1] == '-') {
// String "n-" is IDENT but "n-1" is NTH.
// Set currentCharacter to '-' to continue parsing.
SrcCharacterType* nextCharacter = result;
currentCharacter<SrcCharacterType>() = tokenStart<SrcCharacterType>() + 1;
if (parseNthChildExtra<SrcCharacterType>()) {
m_token = NTH;
yylval->string.setLength(currentCharacter<SrcCharacterType>() - tokenStart<SrcCharacterType>());
} else {
// Revert the change to currentCharacter if unsuccessful.
currentCharacter<SrcCharacterType>() = nextCharacter;
}
}
}
}
if (m_parsingMode == NthChildMode && m_token == IDENT && yylval->string.length() == 2 && yylval->string.equalIgnoringCase("of")) {
m_parsingMode = NormalMode;
m_token = NTHCHILDSELECTORSEPARATOR;
}
break;
case CharacterDot:
if (!isASCIIDigit(currentCharacter<SrcCharacterType>()[0]))
break;
FALLTHROUGH; // To CharacterNumber.
case CharacterNumber: {
bool dotSeen = (m_token == '.');
while (true) {
if (!isASCIIDigit(currentCharacter<SrcCharacterType>()[0])) {
// Only one dot is allowed for a number,
// and it must be followed by a digit.
if (currentCharacter<SrcCharacterType>()[0] != '.' || dotSeen || !isASCIIDigit(currentCharacter<SrcCharacterType>()[1]))
break;
dotSeen = true;
}
++currentCharacter<SrcCharacterType>();
}
if (UNLIKELY(m_parsingMode == NthChildMode) && !dotSeen && isASCIIAlphaCaselessEqual(*currentCharacter<SrcCharacterType>(), 'n')) {
// "[0-9]+n" is always an NthChild.
++currentCharacter<SrcCharacterType>();
parseNthChildExtra<SrcCharacterType>();
m_token = NTH;
yylval->string.init(tokenStart<SrcCharacterType>(), currentCharacter<SrcCharacterType>() - tokenStart<SrcCharacterType>());
break;
}
// Use SVG parser for numbers on SVG presentation attributes.
if (m_context.mode == SVGAttributeMode) {
// We need to take care of units like 'em' or 'ex'.
SrcCharacterType* character = currentCharacter<SrcCharacterType>();
if (isASCIIAlphaCaselessEqual(*character, 'e')) {
ASSERT(character - tokenStart<SrcCharacterType>() > 0);
++character;
if (*character == '-' || *character == '+' || isASCIIDigit(*character)) {
++character;
while (isASCIIDigit(*character))
++character;
// Use FLOATTOKEN if the string contains exponents.
dotSeen = true;
currentCharacter<SrcCharacterType>() = character;
}
}
if (!parseSVGNumber(tokenStart<SrcCharacterType>(), character - tokenStart<SrcCharacterType>(), yylval->number))
break;
} else
yylval->number = charactersToDouble(tokenStart<SrcCharacterType>(), currentCharacter<SrcCharacterType>() - tokenStart<SrcCharacterType>());
// Type of the function.
if (isIdentifierStart<SrcCharacterType>()) {
SrcCharacterType* type = currentCharacter<SrcCharacterType>();
result = currentCharacter<SrcCharacterType>();
parseIdentifier(result, resultString, hasEscape);
m_token = DIMEN;
if (!hasEscape)
detectNumberToken(type, currentCharacter<SrcCharacterType>() - type);
if (m_token == DIMEN) {
// The decoded number is overwritten, but this is intentional.
yylval->string.init(tokenStart<SrcCharacterType>(), currentCharacter<SrcCharacterType>() - tokenStart<SrcCharacterType>());
}
} else if (*currentCharacter<SrcCharacterType>() == '%') {
// Although the CSS grammar says {num}% we follow
// webkit at the moment which uses {num}%+.
do {
++currentCharacter<SrcCharacterType>();
} while (*currentCharacter<SrcCharacterType>() == '%');
m_token = PERCENTAGE;
} else
m_token = dotSeen ? FLOATTOKEN : INTEGER;
break;
}
case CharacterDash:
if (isIdentifierStartAfterDash(currentCharacter<SrcCharacterType>())) {
--currentCharacter<SrcCharacterType>();
parseIdentifier(result, resultString, hasEscape);
m_token = IDENT;
if (*currentCharacter<SrcCharacterType>() == '(') {
m_token = FUNCTION;
if (!hasEscape)
detectDashToken<SrcCharacterType>(result - tokenStart<SrcCharacterType>());
++currentCharacter<SrcCharacterType>();
++result;
} else if (UNLIKELY(m_parsingMode == NthChildMode) && !hasEscape && isASCIIAlphaCaselessEqual(tokenStart<SrcCharacterType>()[1], 'n')) {
if (result - tokenStart<SrcCharacterType>() == 2) {
// String "-n" is IDENT but "-n+1" is NTH.
if (parseNthChildExtra<SrcCharacterType>()) {
m_token = NTH;
result = currentCharacter<SrcCharacterType>();
}
} else if (result - tokenStart<SrcCharacterType>() >= 3 && tokenStart<SrcCharacterType>()[2] == '-') {
// String "-n-" is IDENT but "-n-1" is NTH.
// Set currentCharacter to second '-' of '-n-' to continue parsing.
SrcCharacterType* nextCharacter = result;
currentCharacter<SrcCharacterType>() = tokenStart<SrcCharacterType>() + 2;
if (parseNthChildExtra<SrcCharacterType>()) {
m_token = NTH;
result = currentCharacter<SrcCharacterType>();
} else {
// Revert the change to currentCharacter if unsuccessful.
currentCharacter<SrcCharacterType>() = nextCharacter;
}
}
}
resultString.setLength(result - tokenStart<SrcCharacterType>());
yylval->string = resultString;
} else if (currentCharacter<SrcCharacterType>()[0] == '-' && currentCharacter<SrcCharacterType>()[1] == '>') {
currentCharacter<SrcCharacterType>() += 2;
m_token = SGML_CD;
} else if (UNLIKELY(m_parsingMode == NthChildMode)) {
// "-[0-9]+n" is always an NthChild.
if (parseNthChild<SrcCharacterType>()) {
parseNthChildExtra<SrcCharacterType>();
m_token = NTH;
yylval->string.init(tokenStart<SrcCharacterType>(), currentCharacter<SrcCharacterType>() - tokenStart<SrcCharacterType>());
}
}
break;
case CharacterOther:
// m_token is simply the current character.
break;
case CharacterNull:
// Do not advance pointer at the end of input.
--currentCharacter<SrcCharacterType>();
break;
case CharacterWhiteSpace:
m_token = WHITESPACE;
// Might start with a '\n'.
--currentCharacter<SrcCharacterType>();
do {
if (*currentCharacter<SrcCharacterType>() == '\n')
++m_lineNumber;
++currentCharacter<SrcCharacterType>();
} while (*currentCharacter<SrcCharacterType>() <= ' ' && (typesOfASCIICharacters[*currentCharacter<SrcCharacterType>()] == CharacterWhiteSpace));
break;
case CharacterEndConditionQuery: {
bool isParsingCondition = m_parsingMode == MediaQueryMode;
#if ENABLE(CSS3_CONDITIONAL_RULES)
isParsingCondition = isParsingCondition || m_parsingMode == SupportsMode;
#endif
if (isParsingCondition)
m_parsingMode = NormalMode;
break;
}
case CharacterEndNthChild:
if (m_parsingMode == NthChildMode)
m_parsingMode = NormalMode;
break;
case CharacterQuote:
if (checkAndSkipString(currentCharacter<SrcCharacterType>(), m_token)) {
++result;
parseString<SrcCharacterType>(result, yylval->string, m_token);
m_token = STRING;
}
break;
case CharacterExclamationMark: {
SrcCharacterType* start = skipWhiteSpace(currentCharacter<SrcCharacterType>());
if (isEqualToCSSIdentifier(start, "important")) {
m_token = IMPORTANT_SYM;
currentCharacter<SrcCharacterType>() = start + 9;
}
break;
}
case CharacterHashmark: {
SrcCharacterType* start = currentCharacter<SrcCharacterType>();
result = currentCharacter<SrcCharacterType>();
if (isASCIIDigit(*currentCharacter<SrcCharacterType>())) {
// This must be a valid hex number token.
do {
++currentCharacter<SrcCharacterType>();
} while (isASCIIHexDigit(*currentCharacter<SrcCharacterType>()));
m_token = HEX;
yylval->string.init(start, currentCharacter<SrcCharacterType>() - start);
} else if (isIdentifierStart<SrcCharacterType>()) {
m_token = IDSEL;
parseIdentifier(result, yylval->string, hasEscape);
if (!hasEscape) {
// Check whether the identifier is also a valid hex number.
SrcCharacterType* current = start;
m_token = HEX;
do {
if (!isASCIIHexDigit(*current)) {
m_token = IDSEL;
break;
}
++current;
} while (current < result);
}
}
break;
}
case CharacterSlash:
// Ignore comments. They are not even considered as white spaces.
if (*currentCharacter<SrcCharacterType>() == '*') {
++currentCharacter<SrcCharacterType>();
while (currentCharacter<SrcCharacterType>()[0] != '*' || currentCharacter<SrcCharacterType>()[1] != '/') {
if (*currentCharacter<SrcCharacterType>() == '\n')
++m_lineNumber;
if (*currentCharacter<SrcCharacterType>() == '\0') {
// Unterminated comments are simply ignored.
currentCharacter<SrcCharacterType>() -= 2;
break;
}
++currentCharacter<SrcCharacterType>();
}
currentCharacter<SrcCharacterType>() += 2;
goto restartAfterComment;
}
break;
case CharacterDollar:
if (*currentCharacter<SrcCharacterType>() == '=') {
++currentCharacter<SrcCharacterType>();
m_token = ENDSWITH;
}
break;
case CharacterAsterisk:
if (*currentCharacter<SrcCharacterType>() == '=') {
++currentCharacter<SrcCharacterType>();
m_token = CONTAINS;
}
break;
case CharacterPlus:
if (UNLIKELY(m_parsingMode == NthChildMode)) {
// Simplest case. "+[0-9]*n" is always NthChild.
if (parseNthChild<SrcCharacterType>()) {
parseNthChildExtra<SrcCharacterType>();
m_token = NTH;
yylval->string.init(tokenStart<SrcCharacterType>(), currentCharacter<SrcCharacterType>() - tokenStart<SrcCharacterType>());
}
}
break;
case CharacterLess:
if (currentCharacter<SrcCharacterType>()[0] == '!' && currentCharacter<SrcCharacterType>()[1] == '-' && currentCharacter<SrcCharacterType>()[2] == '-') {
currentCharacter<SrcCharacterType>() += 3;
m_token = SGML_CD;
}
break;
case CharacterAt:
if (isIdentifierStart<SrcCharacterType>()) {
m_token = ATKEYWORD;
++result;
parseIdentifier(result, resultString, hasEscape);
detectAtToken<SrcCharacterType>(result - tokenStart<SrcCharacterType>(), hasEscape);
}
break;
case CharacterBackSlash:
if (isCSSEscape(*currentCharacter<SrcCharacterType>())) {
--currentCharacter<SrcCharacterType>();
parseIdentifier(result, yylval->string, hasEscape);
m_token = IDENT;
}
if (m_parsingMode == NthChildMode && m_token == IDENT && yylval->string.length() == 2 && yylval->string.equalIgnoringCase("of")) {
m_parsingMode = NormalMode;
m_token = NTHCHILDSELECTORSEPARATOR;
}
break;
case CharacterXor:
if (*currentCharacter<SrcCharacterType>() == '=') {
++currentCharacter<SrcCharacterType>();
m_token = BEGINSWITH;
}
break;
case CharacterVerticalBar:
if (*currentCharacter<SrcCharacterType>() == '=') {
++currentCharacter<SrcCharacterType>();
m_token = DASHMATCH;
}
break;
case CharacterTilde:
if (*currentCharacter<SrcCharacterType>() == '=') {
++currentCharacter<SrcCharacterType>();
m_token = INCLUDES;
}
break;
default:
ASSERT_NOT_REACHED();
break;
}
return token();
}
PassRefPtr<StyleRuleBase> CSSParser::createImportRule(const CSSParserString& url, PassRefPtr<MediaQuerySet> media)
{
if (!media || !m_allowImportRules) {
popRuleData();
return 0;
}
RefPtr<StyleRuleImport> rule = StyleRuleImport::create(url, media);
processAndAddNewRuleToSourceTreeIfNeeded();
return rule.release();
}
PassRefPtr<StyleRuleBase> CSSParser::createMediaRule(PassRefPtr<MediaQuerySet> media, RuleList* rules)
{
m_allowImportRules = m_allowNamespaceDeclarations = false;
RefPtr<StyleRuleMedia> rule;
RuleList emptyRules;
if (!media) {
// To comply with w3c test suite expectation, create an empty media query
// even when it is syntactically incorrect.
rule = StyleRuleMedia::create(MediaQuerySet::create(), emptyRules);
} else
rule = StyleRuleMedia::create(media, rules ? *rules : emptyRules);
processAndAddNewRuleToSourceTreeIfNeeded();
return rule.release();
}
PassRefPtr<StyleRuleBase> CSSParser::createEmptyMediaRule(RuleList* rules)
{
return createMediaRule(MediaQuerySet::create(), rules);
}
#if ENABLE(CSS3_CONDITIONAL_RULES)
PassRefPtr<StyleRuleBase> CSSParser::createSupportsRule(bool conditionIsSupported, RuleList* rules)
{
m_allowImportRules = m_allowNamespaceDeclarations = false;
RefPtr<CSSRuleSourceData> data = popSupportsRuleData();
RefPtr<StyleRuleSupports> rule;
String conditionText;
unsigned conditionOffset = data->ruleHeaderRange.start + 9;
unsigned conditionLength = data->ruleHeaderRange.length() - 9;
if (is8BitSource())
conditionText = String(m_dataStart8.get() + conditionOffset, conditionLength).stripWhiteSpace();
else
conditionText = String(m_dataStart16.get() + conditionOffset, conditionLength).stripWhiteSpace();
if (rules)
rule = StyleRuleSupports::create(conditionText, conditionIsSupported, *rules);
else {
RuleList emptyRules;
rule = StyleRuleSupports::create(conditionText, conditionIsSupported, emptyRules);
}
processAndAddNewRuleToSourceTreeIfNeeded();
return rule.release();
}
void CSSParser::markSupportsRuleHeaderStart()
{
if (!m_supportsRuleDataStack)
m_supportsRuleDataStack = std::make_unique<RuleSourceDataList>();
RefPtr<CSSRuleSourceData> data = CSSRuleSourceData::create(CSSRuleSourceData::SUPPORTS_RULE);
data->ruleHeaderRange.start = tokenStartOffset();
m_supportsRuleDataStack->append(data);
}
void CSSParser::markSupportsRuleHeaderEnd()
{
ASSERT(m_supportsRuleDataStack && !m_supportsRuleDataStack->isEmpty());
if (is8BitSource())
m_supportsRuleDataStack->last()->ruleHeaderRange.end = tokenStart<LChar>() - m_dataStart8.get();
else
m_supportsRuleDataStack->last()->ruleHeaderRange.end = tokenStart<UChar>() - m_dataStart16.get();
}
PassRefPtr<CSSRuleSourceData> CSSParser::popSupportsRuleData()
{
ASSERT(m_supportsRuleDataStack && !m_supportsRuleDataStack->isEmpty());
RefPtr<CSSRuleSourceData> data = m_supportsRuleDataStack->last();
m_supportsRuleDataStack->removeLast();
return data.release();
}
#endif
void CSSParser::processAndAddNewRuleToSourceTreeIfNeeded()
{
if (!isExtractingSourceData())
return;
markRuleBodyEnd();
RefPtr<CSSRuleSourceData> rule = popRuleData();
fixUnparsedPropertyRanges(rule.get());
addNewRuleToSourceTree(rule.release());
}
void CSSParser::addNewRuleToSourceTree(PassRefPtr<CSSRuleSourceData> rule)
{
// Precondition: (isExtractingSourceData()).
if (!m_ruleSourceDataResult)
return;
if (m_currentRuleDataStack->isEmpty())
m_ruleSourceDataResult->append(rule);
else
m_currentRuleDataStack->last()->childRules.append(rule);
}
PassRefPtr<CSSRuleSourceData> CSSParser::popRuleData()
{
if (!m_ruleSourceDataResult)
return 0;
ASSERT(!m_currentRuleDataStack->isEmpty());
m_currentRuleData.clear();
RefPtr<CSSRuleSourceData> data = m_currentRuleDataStack->last();
m_currentRuleDataStack->removeLast();
return data.release();
}
void CSSParser::syntaxError(const Location& location, SyntaxErrorType error)
{
if (!isLoggingErrors())
return;
StringBuilder builder;
switch (error) {
case PropertyDeclarationError:
builder.appendLiteral("Invalid CSS property declaration at: ");
break;
default:
builder.appendLiteral("Unexpected CSS token: ");
}
if (location.token.is8Bit())
builder.append(location.token.characters8(), location.token.length());
else
builder.append(location.token.characters16(), location.token.length());
logError(builder.toString(), location.lineNumber);
m_ignoreErrorsInDeclaration = true;
}
bool CSSParser::isLoggingErrors()
{
return m_logErrors && !m_ignoreErrorsInDeclaration;
}
void CSSParser::logError(const String& message, int lineNumber)
{
// FIXME: <http://webkit.org/b/114313> CSS parser console message errors should include column numbers.
PageConsoleClient& console = m_styleSheet->singleOwnerDocument()->page()->console();
console.addMessage(MessageSource::CSS, MessageLevel::Warning, message, m_styleSheet->baseURL().string(), lineNumber + 1, 0);
}
PassRefPtr<StyleRuleKeyframes> CSSParser::createKeyframesRule(const String& name, std::unique_ptr<Vector<RefPtr<StyleKeyframe>>> popKeyframes)
{
std::unique_ptr<Vector<RefPtr<StyleKeyframe>>> keyframes = WTF::move(popKeyframes);
m_allowImportRules = m_allowNamespaceDeclarations = false;
RefPtr<StyleRuleKeyframes> rule = StyleRuleKeyframes::create();
for (size_t i = 0; i < keyframes->size(); ++i)
rule->parserAppendKeyframe(keyframes->at(i));
rule->setName(name);
processAndAddNewRuleToSourceTreeIfNeeded();
return rule.release();
}
PassRefPtr<StyleRuleBase> CSSParser::createStyleRule(Vector<std::unique_ptr<CSSParserSelector>>* selectors)
{
RefPtr<StyleRule> rule;
if (selectors) {
m_allowImportRules = false;
m_allowNamespaceDeclarations = false;
if (m_hasFontFaceOnlyValues)
deleteFontFaceOnlyValues();
rule = StyleRule::create(m_lastSelectorLineNumber, createStyleProperties());
rule->parserAdoptSelectorVector(*selectors);
processAndAddNewRuleToSourceTreeIfNeeded();
} else
popRuleData();
clearProperties();
return rule.release();
}
PassRefPtr<StyleRuleBase> CSSParser::createFontFaceRule()
{
m_allowImportRules = m_allowNamespaceDeclarations = false;
for (unsigned i = 0; i < m_parsedProperties.size(); ++i) {
CSSProperty& property = m_parsedProperties[i];
if (property.id() == CSSPropertyFontVariant && property.value()->isPrimitiveValue())
property.wrapValueInCommaSeparatedList();
else if (property.id() == CSSPropertyFontFamily && (!is<CSSValueList>(*property.value()) || downcast<CSSValueList>(*property.value()).length() != 1)) {
// Unlike font-family property, font-family descriptor in @font-face rule
// has to be a value list with exactly one family name. It cannot have a
// have 'initial' value and cannot 'inherit' from parent.
// See http://dev.w3.org/csswg/css3-fonts/#font-family-desc
clearProperties();
popRuleData();
return 0;
}
}
RefPtr<StyleRuleFontFace> rule = StyleRuleFontFace::create(createStyleProperties());
clearProperties();
processAndAddNewRuleToSourceTreeIfNeeded();
return rule.release();
}
void CSSParser::addNamespace(const AtomicString& prefix, const AtomicString& uri)
{
if (!m_styleSheet || !m_allowNamespaceDeclarations)
return;
m_allowImportRules = false;
m_styleSheet->parserAddNamespace(prefix, uri);
if (prefix.isEmpty() && !uri.isNull())
m_defaultNamespace = uri;
}
QualifiedName CSSParser::determineNameInNamespace(const AtomicString& prefix, const AtomicString& localName)
{
if (!m_styleSheet)
return QualifiedName(prefix, localName, m_defaultNamespace);
return QualifiedName(prefix, localName, m_styleSheet->determineNamespace(prefix));
}
void CSSParser::rewriteSpecifiersWithNamespaceIfNeeded(CSSParserSelector& specifiers)
{
if (m_defaultNamespace != starAtom || specifiers.isCustomPseudoElement())
rewriteSpecifiersWithElementName(nullAtom, starAtom, specifiers, /*tagIsForNamespaceRule*/true);
}
void CSSParser::rewriteSpecifiersWithElementName(const AtomicString& namespacePrefix, const AtomicString& elementName, CSSParserSelector& specifiers, bool tagIsForNamespaceRule)
{
AtomicString determinedNamespace = namespacePrefix != nullAtom && m_styleSheet ? m_styleSheet->determineNamespace(namespacePrefix) : m_defaultNamespace;
QualifiedName tag(namespacePrefix, elementName, determinedNamespace);
if (!specifiers.isCustomPseudoElement()) {
if (tag == anyQName())
return;
if (!specifiers.isPseudoElementCueFunction())
specifiers.prependTagSelector(tag, tagIsForNamespaceRule);
return;
}
CSSParserSelector* lastShadowDescendant = &specifiers;
CSSParserSelector* history = &specifiers;
while (history->tagHistory()) {
history = history->tagHistory();
if (history->isCustomPseudoElement() || history->hasShadowDescendant())
lastShadowDescendant = history;
}
if (lastShadowDescendant->tagHistory()) {
if (tag != anyQName())
lastShadowDescendant->tagHistory()->prependTagSelector(tag, tagIsForNamespaceRule);
return;
}
// For shadow-ID pseudo-elements to be correctly matched, the ShadowDescendant combinator has to be used.
// We therefore create a new Selector with that combinator here in any case, even if matching any (host) element in any namespace (i.e. '*').
lastShadowDescendant->setTagHistory(std::make_unique<CSSParserSelector>(tag));
lastShadowDescendant->setRelation(CSSSelector::ShadowDescendant);
}
std::unique_ptr<CSSParserSelector> CSSParser::rewriteSpecifiers(std::unique_ptr<CSSParserSelector> specifiers, std::unique_ptr<CSSParserSelector> newSpecifier)
{
if (newSpecifier->isCustomPseudoElement() || newSpecifier->isPseudoElementCueFunction()) {
// Unknown pseudo element always goes at the top of selector chain.
newSpecifier->appendTagHistory(CSSSelector::ShadowDescendant, WTF::move(specifiers));
return newSpecifier;
}
if (specifiers->isCustomPseudoElement()) {
// Specifiers for unknown pseudo element go right behind it in the chain.
specifiers->insertTagHistory(CSSSelector::SubSelector, WTF::move(newSpecifier), CSSSelector::ShadowDescendant);
return specifiers;
}
specifiers->appendTagHistory(CSSSelector::SubSelector, WTF::move(newSpecifier));
return specifiers;
}
PassRefPtr<StyleRuleBase> CSSParser::createPageRule(std::unique_ptr<CSSParserSelector> pageSelector)
{
// FIXME: Margin at-rules are ignored.
m_allowImportRules = m_allowNamespaceDeclarations = false;
RefPtr<StyleRulePage> rule;
if (pageSelector) {
rule = StyleRulePage::create(createStyleProperties());
Vector<std::unique_ptr<CSSParserSelector>> selectorVector;
selectorVector.append(WTF::move(pageSelector));
rule->parserAdoptSelectorVector(selectorVector);
processAndAddNewRuleToSourceTreeIfNeeded();
} else
popRuleData();
clearProperties();
return rule.release();
}
std::unique_ptr<Vector<std::unique_ptr<CSSParserSelector>>> CSSParser::createSelectorVector()
{
if (m_recycledSelectorVector) {
m_recycledSelectorVector->shrink(0);
return WTF::move(m_recycledSelectorVector);
}
return std::make_unique<Vector<std::unique_ptr<CSSParserSelector>>>();
}
void CSSParser::recycleSelectorVector(std::unique_ptr<Vector<std::unique_ptr<CSSParserSelector>>> vector)
{
if (vector && !m_recycledSelectorVector)
m_recycledSelectorVector = WTF::move(vector);
}
PassRefPtr<StyleRuleBase> CSSParser::createRegionRule(Vector<std::unique_ptr<CSSParserSelector>>* regionSelector, RuleList* rules)
{
if (!cssRegionsEnabled() || !regionSelector || !rules) {
popRuleData();
return 0;
}
m_allowImportRules = m_allowNamespaceDeclarations = false;
RefPtr<StyleRuleRegion> regionRule = StyleRuleRegion::create(regionSelector, *rules);
if (isExtractingSourceData())
addNewRuleToSourceTree(CSSRuleSourceData::createUnknown());
return regionRule.release();
}
void CSSParser::createMarginAtRule(CSSSelector::MarginBoxType /* marginBox */)
{
// FIXME: Implement margin at-rule here, using:
// - marginBox: margin box
// - m_parsedProperties: properties at [m_numParsedPropertiesBeforeMarginBox, m_parsedProperties.size()] are for this at-rule.
// Don't forget to also update the action for page symbol in CSSGrammar.y such that margin at-rule data is cleared if page_selector is invalid.
endDeclarationsForMarginBox();
}
void CSSParser::startDeclarationsForMarginBox()
{
m_numParsedPropertiesBeforeMarginBox = m_parsedProperties.size();
}
void CSSParser::endDeclarationsForMarginBox()
{
rollbackLastProperties(m_parsedProperties.size() - m_numParsedPropertiesBeforeMarginBox);
m_numParsedPropertiesBeforeMarginBox = INVALID_NUM_PARSED_PROPERTIES;
}
void CSSParser::deleteFontFaceOnlyValues()
{
ASSERT(m_hasFontFaceOnlyValues);
for (unsigned i = 0; i < m_parsedProperties.size();) {
CSSProperty& property = m_parsedProperties[i];
if (property.id() == CSSPropertyFontVariant && property.value()->isValueList()) {
m_parsedProperties.remove(i);
continue;
}
++i;
}
}
PassRefPtr<StyleKeyframe> CSSParser::createKeyframe(CSSParserValueList& keys)
{
// Create a key string from the passed keys
StringBuilder keyString;
for (unsigned i = 0; i < keys.size(); ++i) {
// Just as per the comment below, we ignore keyframes with
// invalid key values (plain numbers or unknown identifiers)
// marked as CSSPrimitiveValue::CSS_UNKNOWN during parsing.
if (keys.valueAt(i)->unit == CSSPrimitiveValue::CSS_UNKNOWN) {
clearProperties();
return 0;
}
ASSERT(keys.valueAt(i)->unit == CSSPrimitiveValue::CSS_NUMBER);
float key = static_cast<float>(keys.valueAt(i)->fValue);
if (key < 0 || key > 100) {
// As per http://www.w3.org/TR/css3-animations/#keyframes,
// "If a keyframe selector specifies negative percentage values
// or values higher than 100%, then the keyframe will be ignored."
clearProperties();
return 0;
}
if (i != 0)
keyString.append(',');
keyString.appendNumber(key);
keyString.append('%');
}
RefPtr<StyleKeyframe> keyframe = StyleKeyframe::create(createStyleProperties());
keyframe->setKeyText(keyString.toString());
clearProperties();
return keyframe.release();
}
void CSSParser::invalidBlockHit()
{
if (m_styleSheet && !m_hadSyntacticallyValidCSSRule)
m_styleSheet->setHasSyntacticallyValidCSSHeader(false);
}
void CSSParser::updateLastSelectorLineAndPosition()
{
m_lastSelectorLineNumber = m_lineNumber;
}
void CSSParser::updateLastMediaLine(MediaQuerySet* media)
{
media->setLastLine(m_lineNumber);
}
template <typename CharacterType>
static inline void fixUnparsedProperties(const CharacterType* characters, CSSRuleSourceData* ruleData)
{
Vector<CSSPropertySourceData>& propertyData = ruleData->styleSourceData->propertyData;
unsigned size = propertyData.size();
if (!size)
return;
unsigned styleStart = ruleData->ruleBodyRange.start;
CSSPropertySourceData* nextData = &(propertyData.at(0));
for (unsigned i = 0; i < size; ++i) {
CSSPropertySourceData* currentData = nextData;
nextData = i < size - 1 ? &(propertyData.at(i + 1)) : 0;
if (currentData->parsedOk)
continue;
if (currentData->range.end > 0 && characters[styleStart + currentData->range.end - 1] == ';')
continue;
unsigned propertyEndInStyleSheet;
if (!nextData)
propertyEndInStyleSheet = ruleData->ruleBodyRange.end - 1;
else
propertyEndInStyleSheet = styleStart + nextData->range.start - 1;
while (isHTMLSpace(characters[propertyEndInStyleSheet]))
--propertyEndInStyleSheet;
// propertyEndInStyleSheet points at the last property text character.
unsigned newPropertyEnd = propertyEndInStyleSheet - styleStart + 1; // Exclusive of the last property text character.
if (currentData->range.end != newPropertyEnd) {
currentData->range.end = newPropertyEnd;
unsigned valueStartInStyleSheet = styleStart + currentData->range.start + currentData->name.length();
while (valueStartInStyleSheet < propertyEndInStyleSheet && characters[valueStartInStyleSheet] != ':')
++valueStartInStyleSheet;
if (valueStartInStyleSheet < propertyEndInStyleSheet)
++valueStartInStyleSheet; // Shift past the ':'.
while (valueStartInStyleSheet < propertyEndInStyleSheet && isHTMLSpace(characters[valueStartInStyleSheet]))
++valueStartInStyleSheet;
// Need to exclude the trailing ';' from the property value.
currentData->value = String(characters + valueStartInStyleSheet, propertyEndInStyleSheet - valueStartInStyleSheet + (characters[propertyEndInStyleSheet] == ';' ? 0 : 1));
}
}
}
void CSSParser::fixUnparsedPropertyRanges(CSSRuleSourceData* ruleData)
{
if (!ruleData->styleSourceData)
return;
if (is8BitSource()) {
fixUnparsedProperties<LChar>(m_dataStart8.get() + m_parsedTextPrefixLength, ruleData);
return;
}
fixUnparsedProperties<UChar>(m_dataStart16.get() + m_parsedTextPrefixLength, ruleData);
}
void CSSParser::markRuleHeaderStart(CSSRuleSourceData::Type ruleType)
{
if (!isExtractingSourceData())
return;
// Pop off data for a previous invalid rule.
if (m_currentRuleData)
m_currentRuleDataStack->removeLast();
RefPtr<CSSRuleSourceData> data = CSSRuleSourceData::create(ruleType);
data->ruleHeaderRange.start = tokenStartOffset();
m_currentRuleData = data;
m_currentRuleDataStack->append(data.release());
}
template <typename CharacterType>
inline void CSSParser::setRuleHeaderEnd(const CharacterType* dataStart)
{
CharacterType* listEnd = tokenStart<CharacterType>();
while (listEnd > dataStart + 1) {
if (isHTMLSpace(*(listEnd - 1)))
--listEnd;
else
break;
}
m_currentRuleDataStack->last()->ruleHeaderRange.end = listEnd - dataStart;
}
void CSSParser::markRuleHeaderEnd()
{
if (!isExtractingSourceData())
return;
ASSERT(!m_currentRuleDataStack->isEmpty());
if (is8BitSource())
setRuleHeaderEnd<LChar>(m_dataStart8.get());
else
setRuleHeaderEnd<UChar>(m_dataStart16.get());
}
void CSSParser::markSelectorStart()
{
if (!isExtractingSourceData() || m_nestedSelectorLevel)
return;
ASSERT(!m_selectorRange.end);
m_selectorRange.start = tokenStartOffset();
}
void CSSParser::markSelectorEnd()
{
if (!isExtractingSourceData() || m_nestedSelectorLevel)
return;
ASSERT(!m_selectorRange.end);
ASSERT(m_currentRuleDataStack->size());
m_selectorRange.end = tokenStartOffset();
m_currentRuleDataStack->last()->selectorRanges.append(m_selectorRange);
m_selectorRange.start = 0;
m_selectorRange.end = 0;
}
void CSSParser::markRuleBodyStart()
{
if (!isExtractingSourceData())
return;
m_currentRuleData.clear();
unsigned offset = tokenStartOffset();
if (tokenStartChar() == '{')
++offset; // Skip the rule body opening brace.
ASSERT(!m_currentRuleDataStack->isEmpty());
m_currentRuleDataStack->last()->ruleBodyRange.start = offset;
}
void CSSParser::markRuleBodyEnd()
{
// Precondition: (!isExtractingSourceData())
unsigned offset = tokenStartOffset();
ASSERT(!m_currentRuleDataStack->isEmpty());
m_currentRuleDataStack->last()->ruleBodyRange.end = offset;
}
void CSSParser::markPropertyStart()
{
m_ignoreErrorsInDeclaration = false;
if (!isExtractingSourceData())
return;
if (m_currentRuleDataStack->isEmpty() || !m_currentRuleDataStack->last()->styleSourceData)
return;
m_propertyRange.start = tokenStartOffset();
}
void CSSParser::markPropertyEnd(bool isImportantFound, bool isPropertyParsed)
{
if (!isExtractingSourceData())
return;
if (m_currentRuleDataStack->isEmpty() || !m_currentRuleDataStack->last()->styleSourceData)
return;
unsigned offset = tokenStartOffset();
if (tokenStartChar() == ';') // Include semicolon into the property text.
++offset;
m_propertyRange.end = offset;
if (m_propertyRange.start != UINT_MAX && !m_currentRuleDataStack->isEmpty()) {
// This stuff is only executed when the style data retrieval is requested by client.
const unsigned start = m_propertyRange.start;
const unsigned end = m_propertyRange.end;
ASSERT_WITH_SECURITY_IMPLICATION(start < end);
String propertyString;
if (is8BitSource())
propertyString = String(m_dataStart8.get() + start, end - start).stripWhiteSpace();
else
propertyString = String(m_dataStart16.get() + start, end - start).stripWhiteSpace();
if (propertyString.endsWith(';'))
propertyString = propertyString.left(propertyString.length() - 1);
size_t colonIndex = propertyString.find(':');
ASSERT(colonIndex != notFound);
String name = propertyString.left(colonIndex).stripWhiteSpace();
String value = propertyString.substring(colonIndex + 1, propertyString.length()).stripWhiteSpace();
// The property range is relative to the declaration start offset.
SourceRange& topRuleBodyRange = m_currentRuleDataStack->last()->ruleBodyRange;
m_currentRuleDataStack->last()->styleSourceData->propertyData.append(
CSSPropertySourceData(name, value, isImportantFound, isPropertyParsed, SourceRange(start - topRuleBodyRange.start, end - topRuleBodyRange.start)));
}
resetPropertyRange();
}
#if ENABLE(CSS_DEVICE_ADAPTATION)
PassRefPtr<StyleRuleBase> CSSParser::createViewportRule()
{
m_allowImportRules = m_allowNamespaceDeclarations = false;
RefPtr<StyleRuleViewport> rule = StyleRuleViewport::create(createStyleProperties());
clearProperties();
processAndAddNewRuleToSourceTreeIfNeeded();
return rule.release();
}
bool CSSParser::parseViewportProperty(CSSPropertyID propId, bool important)
{
CSSParserValue* value = m_valueList->current();
if (!value)
return false;
CSSValueID id = value->id;
bool validPrimitive = false;
switch (propId) {
case CSSPropertyMinWidth: // auto | device-width | device-height | <length> | <percentage>
case CSSPropertyMaxWidth:
case CSSPropertyMinHeight:
case CSSPropertyMaxHeight:
if (id == CSSValueAuto || id == CSSValueDeviceWidth || id == CSSValueDeviceHeight)
validPrimitive = true;
else
validPrimitive = (!id && validUnit(value, FLength | FPercent | FNonNeg));
break;
case CSSPropertyWidth: // shorthand
return parseViewportShorthand(propId, CSSPropertyMinWidth, CSSPropertyMaxWidth, important);
case CSSPropertyHeight:
return parseViewportShorthand(propId, CSSPropertyMinHeight, CSSPropertyMaxHeight, important);
case CSSPropertyMinZoom: // auto | <number> | <percentage>
case CSSPropertyMaxZoom:
case CSSPropertyZoom:
if (id == CSSValueAuto)
validPrimitive = true;
else
validPrimitive = (!id && validUnit(value, FNumber | FPercent | FNonNeg));
break;
case CSSPropertyUserZoom: // zoom | fixed
if (id == CSSValueZoom || id == CSSValueFixed)
validPrimitive = true;
break;
case CSSPropertyOrientation: // auto | portrait | landscape
if (id == CSSValueAuto || id == CSSValuePortrait || id == CSSValueLandscape)
validPrimitive = true;
default:
break;
}
RefPtr<CSSValue> parsedValue;
if (validPrimitive) {
parsedValue = parseValidPrimitive(id, value);
m_valueList->next();
}
if (parsedValue) {
if (!m_valueList->current() || inShorthand()) {
addProperty(propId, parsedValue.release(), important);
return true;
}
}
return false;
}
bool CSSParser::parseViewportShorthand(CSSPropertyID propId, CSSPropertyID first, CSSPropertyID second, bool important)
{
unsigned numValues = m_valueList->size();
if (numValues > 2)
return false;
ShorthandScope scope(this, propId);
if (!parseViewportProperty(first, important))
return false;
// If just one value is supplied, the second value
// is implicitly initialized with the first value.
if (numValues == 1)
m_valueList->previous();
return parseViewportProperty(second, important);
}
#endif
template <typename CharacterType>
static CSSPropertyID cssPropertyID(const CharacterType* propertyName, unsigned length)
{
char buffer[maxCSSPropertyNameLength + 1 + 1]; // 1 to turn "apple"/"khtml" into "webkit", 1 for null character
for (unsigned i = 0; i != length; ++i) {
CharacterType c = propertyName[i];
if (c == 0 || c >= 0x7F)
return CSSPropertyInvalid; // illegal character
buffer[i] = toASCIILower(c);
}
buffer[length] = '\0';
const char* name = buffer;
if (buffer[0] == '-') {
#if ENABLE(LEGACY_CSS_VENDOR_PREFIXES)
// If the prefix is -apple- or -khtml-, change it to -webkit-.
// This makes the string one character longer.
if (RuntimeEnabledFeatures::sharedFeatures().legacyCSSVendorPrefixesEnabled()
&& (hasPrefix(buffer, length, "-apple-") || hasPrefix(buffer, length, "-khtml-"))) {
memmove(buffer + 7, buffer + 6, length + 1 - 6);
memcpy(buffer, "-webkit", 7);
++length;
}
#endif
#if PLATFORM(IOS)
cssPropertyNameIOSAliasing(buffer, name, length);
#endif
}
const Property* hashTableEntry = findProperty(name, length);
return hashTableEntry ? static_cast<CSSPropertyID>(hashTableEntry->id) : CSSPropertyInvalid;
}
CSSPropertyID cssPropertyID(const String& string)
{
unsigned length = string.length();
if (!length)
return CSSPropertyInvalid;
if (length > maxCSSPropertyNameLength)
return CSSPropertyInvalid;
return string.is8Bit() ? cssPropertyID(string.characters8(), length) : cssPropertyID(string.characters16(), length);
}
CSSPropertyID cssPropertyID(const CSSParserString& string)
{
unsigned length = string.length();
if (!length)
return CSSPropertyInvalid;
if (length > maxCSSPropertyNameLength)
return CSSPropertyInvalid;
return string.is8Bit() ? cssPropertyID(string.characters8(), length) : cssPropertyID(string.characters16(), length);
}
#if PLATFORM(IOS)
void cssPropertyNameIOSAliasing(const char* propertyName, const char*& propertyNameAlias, unsigned& newLength)
{
if (!strcmp(propertyName, "-webkit-hyphenate-locale")) {
// Worked in iOS 4.2.
static const char* const webkitLocale = "-webkit-locale";
propertyNameAlias = webkitLocale;
newLength = strlen(webkitLocale);
}
}
#endif
template <typename CharacterType>
static CSSValueID cssValueKeywordID(const CharacterType* valueKeyword, unsigned length)
{
char buffer[maxCSSValueKeywordLength + 1 + 1]; // 1 to turn "apple"/"khtml" into "webkit", 1 for null character
for (unsigned i = 0; i != length; ++i) {
CharacterType c = valueKeyword[i];
if (c == 0 || c >= 0x7F)
return CSSValueInvalid; // illegal keyword.
buffer[i] = WTF::toASCIILower(c);
}
buffer[length] = '\0';
if (buffer[0] == '-') {
// If the prefix is -apple- or -khtml-, change it to -webkit-.
// This makes the string one character longer.
// On iOS we don't want to change values starting with -apple-system to -webkit-system.
if ((hasPrefix(buffer, length, "-apple-") && !hasPrefix(buffer, length, "-apple-system")) || hasPrefix(buffer, length, "-khtml-")) {
memmove(buffer + 7, buffer + 6, length + 1 - 6);
memcpy(buffer, "-webkit", 7);
++length;
}
}
const Value* hashTableEntry = findValue(buffer, length);
return hashTableEntry ? static_cast<CSSValueID>(hashTableEntry->id) : CSSValueInvalid;
}
CSSValueID cssValueKeywordID(const CSSParserString& string)
{
unsigned length = string.length();
if (!length)
return CSSValueInvalid;
if (length > maxCSSValueKeywordLength)
return CSSValueInvalid;
return string.is8Bit() ? cssValueKeywordID(string.characters8(), length) : cssValueKeywordID(string.characters16(), length);
}
template <typename CharacterType>
static inline bool isCSSTokenizerIdentifier(const CharacterType* characters, unsigned length)
{
const CharacterType* end = characters + length;
// -?
if (characters != end && characters[0] == '-')
++characters;
// {nmstart}
if (characters == end || !(characters[0] == '_' || characters[0] >= 128 || isASCIIAlpha(characters[0])))
return false;
++characters;
// {nmchar}*
for (; characters != end; ++characters) {
if (!(characters[0] == '_' || characters[0] == '-' || characters[0] >= 128 || isASCIIAlphanumeric(characters[0])))
return false;
}
return true;
}
// "ident" from the CSS tokenizer, minus backslash-escape sequences
static bool isCSSTokenizerIdentifier(const String& string)
{
unsigned length = string.length();
if (!length)
return false;
if (string.is8Bit())
return isCSSTokenizerIdentifier(string.characters8(), length);
return isCSSTokenizerIdentifier(string.characters16(), length);
}
template <typename CharacterType>
static inline bool isCSSTokenizerURL(const CharacterType* characters, unsigned length)
{
const CharacterType* end = characters + length;
for (; characters != end; ++characters) {
CharacterType c = characters[0];
switch (c) {
case '!':
case '#':
case '$':
case '%':
case '&':
break;
default:
if (c < '*')
return false;
if (c <= '~')
break;
if (c < 128)
return false;
}
}
return true;
}
// "url" from the CSS tokenizer, minus backslash-escape sequences
static bool isCSSTokenizerURL(const String& string)
{
unsigned length = string.length();
if (!length)
return true;
if (string.is8Bit())
return isCSSTokenizerURL(string.characters8(), length);
return isCSSTokenizerURL(string.characters16(), length);
}
template <typename CharacterType>
static inline String quoteCSSStringInternal(const CharacterType* characters, unsigned length)
{
// For efficiency, we first pre-calculate the length of the quoted string, then we build the actual one.
// Please see below for the actual logic.
unsigned quotedStringSize = 2; // Two quotes surrounding the entire string.
bool afterEscape = false;
for (unsigned i = 0; i < length; ++i) {
CharacterType ch = characters[i];
if (ch == '\\' || ch == '\'') {
quotedStringSize += 2;
afterEscape = false;
} else if (ch < 0x20 || ch == 0x7F) {
quotedStringSize += 2 + (ch >= 0x10);
afterEscape = true;
} else {
quotedStringSize += 1 + (afterEscape && (isASCIIHexDigit(ch) || ch == ' '));
afterEscape = false;
}
}
StringBuffer<CharacterType> buffer(quotedStringSize);
unsigned index = 0;
buffer[index++] = '\'';
afterEscape = false;
for (unsigned i = 0; i < length; ++i) {
CharacterType ch = characters[i];
if (ch == '\\' || ch == '\'') {
buffer[index++] = '\\';
buffer[index++] = ch;
afterEscape = false;
} else if (ch < 0x20 || ch == 0x7F) { // Control characters.
buffer[index++] = '\\';
placeByteAsHexCompressIfPossible(ch, buffer, index, Lowercase);
afterEscape = true;
} else {
// Space character may be required to separate backslash-escape sequence and normal characters.
if (afterEscape && (isASCIIHexDigit(ch) || ch == ' '))
buffer[index++] = ' ';
buffer[index++] = ch;
afterEscape = false;
}
}
buffer[index++] = '\'';
ASSERT(quotedStringSize == index);
return String::adopt(buffer);
}
// We use single quotes for now because markup.cpp uses double quotes.
String quoteCSSString(const String& string)
{
// This function expands each character to at most 3 characters ('\u0010' -> '\' '1' '0') as well as adds
// 2 quote characters (before and after). Make sure the resulting size (3 * length + 2) will not overflow unsigned.
unsigned length = string.length();
if (!length)
return String("\'\'");
if (length > std::numeric_limits<unsigned>::max() / 3 - 2)
return emptyString();
if (string.is8Bit())
return quoteCSSStringInternal(string.characters8(), length);
return quoteCSSStringInternal(string.characters16(), length);
}
String quoteCSSStringIfNeeded(const String& string)
{
return isCSSTokenizerIdentifier(string) ? string : quoteCSSString(string);
}
String quoteCSSURLIfNeeded(const String& string)
{
return isCSSTokenizerURL(string) ? string : quoteCSSString(string);
}
bool isValidNthToken(const CSSParserString& token)
{
// The tokenizer checks for the construct of an+b.
// However, since the {ident} rule precedes the {nth} rule, some of those
// tokens are identified as string literal. Furthermore we need to accept
// "odd" and "even" which does not match to an+b.
return equalIgnoringCase(token, "odd") || equalIgnoringCase(token, "even")
|| equalIgnoringCase(token, "n") || equalIgnoringCase(token, "-n");
}
}