Google Git
Sign in
webkit / WebKit / eb180db3197566c3443e9723b095362ffa87dd04 / . / Source / WebCore / css / CSSParser.cpp
blob: 973342d090809979fb90e60194e6b9cf66618013 [file] [log] [blame]
/*
* Copyright (C) 2003 Lars Knoll (knoll@kde.org)
* Copyright (C) 2005 Allan Sandfeld Jensen (kde@carewolf.com)
* Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012 Apple Inc. All rights reserved.
* Copyright (C) 2007 Nicholas Shanks <webkit@nickshanks.com>
* Copyright (C) 2008 Eric Seidel <eric@webkit.org>
* Copyright (C) 2009 Torch Mobile Inc. All rights reserved. (http://www.torchmobile.com/)
* Copyright (C) 2012 Adobe Systems Incorporated. All rights reserved.
*
* 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 "CSSBorderImage.h"
#include "CSSCanvasValue.h"
#include "CSSCrossfadeValue.h"
#include "CSSCursorImageValue.h"
#include "CSSFontFaceRule.h"
#include "CSSFontFaceSrcValue.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 "CSSProperty.h"
#include "CSSPropertySourceData.h"
#include "CSSReflectValue.h"
#include "CSSSelector.h"
#include "CSSTimingFunctionValue.h"
#include "CSSUnicodeRangeValue.h"
#include "CSSValueKeywords.h"
#include "CSSValueList.h"
#include "CSSValuePool.h"
#include "CSSWrapShapes.h"
#include "Counter.h"
#include "Document.h"
#include "FloatConversion.h"
#include "FontFeatureValue.h"
#include "FontValue.h"
#include "HTMLParserIdioms.h"
#include "HashTools.h"
#include "MediaList.h"
#include "MediaQueryExp.h"
#include "Page.h"
#include "Pair.h"
#include "Rect.h"
#include "RenderTheme.h"
#include "RuntimeEnabledFeatures.h"
#include "Settings.h"
#include "ShadowValue.h"
#include "StylePropertySet.h"
#include "StylePropertyShorthand.h"
#include "StyleRule.h"
#include "StyleRuleImport.h"
#include "StyleSheetContents.h"
#include "TextEncoding.h"
#include "WebKitCSSKeyframeRule.h"
#include "WebKitCSSKeyframesRule.h"
#include "WebKitCSSRegionRule.h"
#include "WebKitCSSTransformValue.h"
#include <limits.h>
#include <wtf/BitArray.h>
#include <wtf/HexNumber.h>
#include <wtf/dtoa.h>
#include <wtf/text/StringBuffer.h>
#include <wtf/text/StringBuilder.h>
#if ENABLE(CSS_IMAGE_SET)
#include "CSSImageSetValue.h"
#endif
#if ENABLE(CSS_FILTERS)
#include "WebKitCSSFilterValue.h"
#endif
#if ENABLE(CSS_SHADERS)
#include "WebKitCSSShaderValue.h"
#endif
#if ENABLE(DASHBOARD_SUPPORT)
#include "DashboardRegion.h"
#endif
#define YYDEBUG 0
#if YYDEBUG > 0
extern int cssyydebug;
#endif
extern int cssyyparse(void* parser);
using namespace std;
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;
static bool equal(const CSSParserString& a, const char* b)
{
for (int i = 0; i < a.length; ++i) {
if (!b[i])
return false;
if (a.characters[i] != b[i])
return false;
}
return !b[a.length];
}
static bool equalIgnoringCase(const CSSParserString& a, const char* b)
{
for (int i = 0; i < a.length; ++i) {
if (!b[i])
return false;
ASSERT(!isASCIIUpper(b[i]));
if (toASCIILower(a.characters[i]) != b[i])
return false;
}
return !b[a.length];
}
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;
}
const CSSParserContext& strictCSSParserContext()
{
DEFINE_STATIC_LOCAL(CSSParserContext, strictContext, (CSSStrictMode));
return strictContext;
}
CSSParserContext::CSSParserContext(CSSParserMode mode, const KURL& baseURL)
: baseURL(baseURL)
, mode(mode)
, isHTMLDocument(false)
, isCSSCustomFilterEnabled(false)
, isCSSRegionsEnabled(false)
, isCSSGridLayoutEnabled(false)
, needsSiteSpecificQuirks(false)
, enforcesCSSMIMETypeInNoQuirksMode(true)
{
}
CSSParserContext::CSSParserContext(Document* document, const KURL& baseURL, const String& charset)
: baseURL(baseURL.isNull() ? document->baseURL() : baseURL)
, charset(charset)
, mode(document->inQuirksMode() ? CSSQuirksMode : CSSStrictMode)
, isHTMLDocument(document->isHTMLDocument())
, isCSSCustomFilterEnabled(document->settings() ? document->settings()->isCSSCustomFilterEnabled() : false)
, isCSSRegionsEnabled(document->cssRegionsEnabled())
, isCSSGridLayoutEnabled(document->cssGridLayoutEnabled())
, needsSiteSpecificQuirks(document->settings() ? document->settings()->needsSiteSpecificQuirks() : false)
, enforcesCSSMIMETypeInNoQuirksMode(!document->settings() || document->settings()->enforceCSSMIMETypeInNoQuirksMode())
{
}
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.isCSSCustomFilterEnabled == b.isCSSCustomFilterEnabled
&& a.isCSSRegionsEnabled == b.isCSSRegionsEnabled
&& a.isCSSGridLayoutEnabled == b.isCSSGridLayoutEnabled
&& a.needsSiteSpecificQuirks == b.needsSiteSpecificQuirks
&& a.enforcesCSSMIMETypeInNoQuirksMode == b.enforcesCSSMIMETypeInNoQuirksMode;
}
CSSParser::CSSParser(const CSSParserContext& context)
: m_context(context)
, m_important(false)
, m_id(CSSPropertyInvalid)
, m_styleSheet(0)
, 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_defaultNamespace(starAtom)
, m_inStyleRuleOrDeclaration(false)
, m_selectorListRange(0, 0)
, m_ruleBodyRange(0, 0)
, m_propertyRange(UINT_MAX, UINT_MAX)
, m_ruleRangeMap(0)
, m_currentRuleData(0)
, m_parsingMode(NormalMode)
, m_currentCharacter(0)
, m_tokenStart(0)
, m_token(0)
, m_lineNumber(0)
, m_lastSelectorLineNumber(0)
, m_allowImportRules(true)
, m_allowNamespaceDeclarations(true)
{
#if YYDEBUG > 0
cssyydebug = 1;
#endif
CSSPropertySourceData::init();
}
CSSParser::~CSSParser()
{
clearProperties();
fastDeleteAllValues(m_floatingSelectors);
deleteAllValues(m_floatingSelectorVectors);
deleteAllValues(m_floatingValueLists);
deleteAllValues(m_floatingFunctions);
}
void CSSParserString::lower()
{
// 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(characters, length)) {
// Fast case for all-ASCII.
for (int i = 0; i < length; i++)
characters[i] = toASCIILower(characters[i]);
} else {
for (int i = 0; i < length; i++)
characters[i] = Unicode::toLower(characters[i]);
}
}
void CSSParser::setupParser(const char* prefix, const String& string, const char* suffix)
{
int length = string.length() + strlen(prefix) + strlen(suffix) + 1;
m_dataStart = adoptArrayPtr(new UChar[length]);
for (unsigned i = 0; i < strlen(prefix); i++)
m_dataStart[i] = prefix[i];
memcpy(m_dataStart.get() + strlen(prefix), string.characters(), string.length() * sizeof(UChar));
unsigned start = strlen(prefix) + string.length();
unsigned end = start + strlen(suffix);
for (unsigned i = start; i < end; i++)
m_dataStart[i] = suffix[i - start];
m_dataStart[length - 1] = 0;
m_currentCharacter = m_tokenStart = m_dataStart.get();
resetRuleBodyMarks();
}
void CSSParser::parseSheet(StyleSheetContents* sheet, const String& string, int startLineNumber, StyleRuleRangeMap* ruleRangeMap)
{
setStyleSheet(sheet);
m_defaultNamespace = starAtom; // Reset the default namespace.
m_ruleRangeMap = ruleRangeMap;
if (ruleRangeMap) {
m_currentRuleData = CSSRuleSourceData::create();
m_currentRuleData->styleSourceData = CSSStyleSourceData::create();
}
m_lineNumber = startLineNumber;
setupParser("", string, "");
cssyyparse(this);
m_ruleRangeMap = 0;
m_currentRuleData = 0;
m_rule = 0;
}
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();
}
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 CSSPropertyWebkitTextEmphasisColor:
case CSSPropertyWebkitTextFillColor:
case CSSPropertyWebkitTextStrokeColor:
return true;
default:
return false;
}
}
static bool parseColorValue(StylePropertySet* 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.characters = const_cast<UChar*>(string.characters());
cssString.length = string.length();
int valueID = cssValueKeywordID(cssString);
bool validPrimitive = false;
if (valueID == CSSValueWebkitText)
validPrimitive = true;
else if (valueID == CSSValueCurrentcolor)
validPrimitive = true;
else if ((valueID >= CSSValueAqua && valueID <= CSSValueWindowtext) || valueID == CSSValueMenu
|| (valueID >= CSSValueWebkitFocusRingColor && valueID < CSSValueWebkitText && !strict)) {
validPrimitive = true;
}
if (validPrimitive) {
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_EXCLUSIONS)
case CSSPropertyWebkitWrapMargin:
case CSSPropertyWebkitWrapPadding:
acceptsNegativeNumbers = false;
return RuntimeEnabledFeatures::cssExclusionsEnabled();
#endif
case CSSPropertyBottom:
case CSSPropertyLeft:
case CSSPropertyMarginBottom:
case CSSPropertyMarginLeft:
case CSSPropertyMarginRight:
case CSSPropertyMarginTop:
case CSSPropertyRight:
case CSSPropertyTextIndent:
case CSSPropertyTop:
case CSSPropertyWebkitMarginAfter:
case CSSPropertyWebkitMarginBefore:
case CSSPropertyWebkitMarginEnd:
case CSSPropertyWebkitMarginStart:
acceptsNegativeNumbers = true;
return true;
default:
return false;
}
}
template <typename CharType>
static inline bool parseSimpleLength(const CharType* 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(StylePropertySet* 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 | run-in | 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
// -webkit-flex | -webkit-inline-flex | -webkit-grid | -webkit-inline-grid
if ((valueID >= CSSValueInline && valueID <= CSSValueWebkitInlineBox) || valueID == CSSValueNone)
return true;
#if ENABLE(CSS3_FLEXBOX)
if (valueID == CSSValueWebkitFlex || valueID == CSSValueWebkitInlineFlex)
return true;
#endif
if (parserContext.isCSSGridLayoutEnabled && (valueID == CSSValueWebkitGrid || valueID == CSSValueWebkitInlineGrid))
return true;
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 | optimizeContrast
if (valueID == CSSValueAuto || 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 CSSPropertyOutlineStyle: // (<border-style> except hidden) | auto | inherit
if (valueID == CSSValueAuto || valueID == CSSValueNone || (valueID >= CSSValueInset && valueID <= CSSValueDouble))
return true;
break;
case CSSPropertyOverflowX:
case CSSPropertyOverflowY: // visible | hidden | scroll | auto | marquee | overlay | inherit
if (valueID == CSSValueVisible || valueID == CSSValueHidden || valueID == CSSValueScroll || valueID == CSSValueAuto || valueID == CSSValueOverlay || valueID == CSSValueWebkitMarquee)
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 | inherit
if (valueID == CSSValueStatic || valueID == CSSValueRelative || valueID == CSSValueAbsolute || valueID == CSSValueFixed)
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;
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;
case CSSPropertyWebkitBoxDecorationBreak:
if (valueID == CSSValueClone || valueID == CSSValueSlice)
return true;
break;
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;
#if ENABLE(CSS3_FLEXBOX)
case CSSPropertyWebkitAlignContent:
if (valueID == CSSValueFlexStart || valueID == CSSValueFlexEnd || valueID == CSSValueCenter || valueID == CSSValueSpaceBetween || valueID == CSSValueSpaceAround || valueID == CSSValueStretch)
return true;
break;
case CSSPropertyWebkitAlignItems:
if (valueID == CSSValueFlexStart || valueID == CSSValueFlexEnd || valueID == CSSValueCenter || valueID == CSSValueBaseline || valueID == CSSValueStretch)
return true;
break;
case CSSPropertyWebkitAlignSelf:
if (valueID == CSSValueAuto || valueID == CSSValueFlexStart || valueID == CSSValueFlexEnd || valueID == CSSValueCenter || valueID == CSSValueBaseline || valueID == CSSValueStretch)
return true;
break;
case CSSPropertyWebkitFlexDirection:
if (valueID == CSSValueRow || valueID == CSSValueRowReverse || valueID == CSSValueColumn || valueID == CSSValueColumnReverse)
return true;
break;
case CSSPropertyWebkitFlexWrap:
if (valueID == CSSValueNone || valueID == CSSValueWrap || valueID == CSSValueWrapReverse)
return true;
break;
case CSSPropertyWebkitJustifyContent:
if (valueID == CSSValueFlexStart || valueID == CSSValueFlexEnd || valueID == CSSValueCenter || valueID == CSSValueSpaceBetween || valueID == CSSValueSpaceAround)
return true;
break;
#endif
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: // normal | after-white-space
if (valueID == CSSValueNormal || 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 CSSPropertyWebkitMatchNearestMailBlockquoteColor: // normal | match
if (valueID == CSSValueNormal || valueID == CSSValueMatch)
return true;
break;
case CSSPropertyWebkitNbspMode: // normal | space
if (valueID == CSSValueNormal || valueID == CSSValueSpace)
return true;
break;
#if ENABLE(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 CSSPropertyWebkitRegionOverflow:
if (parserContext.isCSSRegionsEnabled && (valueID == CSSValueAuto || valueID == CSSValueBreak))
return true;
break;
#endif
case CSSPropertyWebkitRtlOrdering:
if (valueID == CSSValueLogical || valueID == CSSValueVisual)
return true;
break;
case CSSPropertyWebkitTextCombine:
if (valueID == CSSValueNone || valueID == CSSValueHorizontal)
return true;
break;
case CSSPropertyWebkitTextEmphasisPosition:
if (valueID == CSSValueOver || valueID == CSSValueUnder)
return true;
break;
case CSSPropertyWebkitTextSecurity:
// disc | circle | square | none | inherit
if (valueID == CSSValueDisc || valueID == CSSValueCircle || valueID == CSSValueSquare || valueID == CSSValueNone)
return true;
break;
case CSSPropertyWebkitTextSizeAdjust:
if (valueID == CSSValueAuto || valueID == CSSValueNone)
return true;
break;
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
if (valueID == CSSValueAuto || valueID == CSSValueNone || valueID == CSSValueText)
return true;
break;
#if ENABLE(CSS_EXCLUSIONS)
case CSSPropertyWebkitWrapFlow:
if (!RuntimeEnabledFeatures::cssExclusionsEnabled())
return false;
if (valueID == CSSValueAuto || valueID == CSSValueBoth || valueID == CSSValueStart || valueID == CSSValueEnd || valueID == CSSValueMaximum || valueID == CSSValueClear)
return true;
break;
case CSSPropertyWebkitWrapThrough:
if (!RuntimeEnabledFeatures::cssExclusionsEnabled())
return false;
if (valueID == CSSValueWrap || valueID == CSSValueNone)
return true;
break;
#endif
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;
case CSSPropertyWordWrap: // normal | break-word
if (valueID == CSSValueNormal || valueID == CSSValueBreakWord)
return true;
break;
default:
ASSERT_NOT_REACHED();
return false;
}
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 CSSPropertyOutlineStyle:
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:
case CSSPropertyWebkitBoxDecorationBreak:
case CSSPropertyWebkitBoxDirection:
case CSSPropertyWebkitBoxLines:
case CSSPropertyWebkitBoxOrient:
case CSSPropertyWebkitBoxPack:
case CSSPropertyWebkitColorCorrection:
case CSSPropertyWebkitColumnBreakAfter:
case CSSPropertyWebkitColumnBreakBefore:
case CSSPropertyWebkitColumnBreakInside:
case CSSPropertyWebkitColumnRuleStyle:
#if ENABLE(CSS3_FLEXBOX)
case CSSPropertyWebkitAlignContent:
case CSSPropertyWebkitAlignItems:
case CSSPropertyWebkitAlignSelf:
case CSSPropertyWebkitFlexDirection:
case CSSPropertyWebkitFlexWrap:
case CSSPropertyWebkitJustifyContent:
#endif
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 CSSPropertyWebkitMatchNearestMailBlockquoteColor:
case CSSPropertyWebkitNbspMode:
#if ENABLE(OVERFLOW_SCROLLING)
case CSSPropertyWebkitOverflowScrolling:
#endif
case CSSPropertyWebkitPrintColorAdjust:
#if ENABLE(CSS_REGIONS)
case CSSPropertyWebkitRegionBreakAfter:
case CSSPropertyWebkitRegionBreakBefore:
case CSSPropertyWebkitRegionBreakInside:
case CSSPropertyWebkitRegionOverflow:
#endif
case CSSPropertyWebkitRtlOrdering:
case CSSPropertyWebkitTextCombine:
case CSSPropertyWebkitTextEmphasisPosition:
case CSSPropertyWebkitTextSecurity:
case CSSPropertyWebkitTextSizeAdjust:
case CSSPropertyWebkitTransformStyle:
case CSSPropertyWebkitUserDrag:
case CSSPropertyWebkitUserModify:
case CSSPropertyWebkitUserSelect:
#if ENABLE(CSS_EXCLUSIONS)
case CSSPropertyWebkitWrapFlow:
case CSSPropertyWebkitWrapThrough:
#endif
case CSSPropertyWebkitWritingMode:
case CSSPropertyWhiteSpace:
case CSSPropertyWordBreak:
case CSSPropertyWordWrap:
return true;
default:
return false;
}
}
static bool parseKeywordValue(StylePropertySet* declaration, CSSPropertyID propertyId, const String& string, bool important, const CSSParserContext& parserContext)
{
ASSERT(!string.isEmpty());
if (!isKeywordPropertyID(propertyId))
return false;
CSSParserString cssString;
cssString.characters = const_cast<UChar*>(string.characters());
cssString.length = string.length();
int 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;
}
PassRefPtr<CSSValueList> CSSParser::parseFontFaceValue(const AtomicString& string)
{
if (string.isEmpty())
return 0;
RefPtr<StylePropertySet> dummyStyle = StylePropertySet::create();
if (!parseValue(dummyStyle.get(), CSSPropertyFontFamily, string, false, CSSQuirksMode, 0))
return 0;
return static_pointer_cast<CSSValueList>(dummyStyle->getPropertyCSSValue(CSSPropertyFontFamily));
}
bool CSSParser::parseValue(StylePropertySet* 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;
if (parseKeywordValue(declaration, propertyID, string, important, contextStyleSheet->parserContext()))
return true;
CSSParserContext context(cssParserMode);
if (contextStyleSheet) {
context = contextStyleSheet->parserContext();
context.mode = cssParserMode;
}
CSSParser parser(context);
return parser.parseValue(declaration, propertyID, string, important, contextStyleSheet);
}
bool CSSParser::parseValue(StylePropertySet* 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 (!value->isPrimitiveValue())
return false;
CSSPrimitiveValue* primitiveValue = static_cast<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.characters = const_cast<UChar*>(string.characters());
cssColor.length = string.length();
int id = cssValueKeywordID(cssColor);
if (id <= 0)
return false;
color = document->page()->theme()->systemColor(id).rgb();
return true;
}
void CSSParser::parseSelector(const String& string, CSSSelectorList& selectorList)
{
m_selectorListForParseSelector = &selectorList;
setupParser("@-webkit-selector{", string, "}");
cssyyparse(this);
m_selectorListForParseSelector = 0;
}
bool CSSParser::parseDeclaration(StylePropertySet* declaration, const String& string, RefPtr<CSSStyleSourceData>* styleSourceData, StyleSheetContents* contextStyleSheet)
{
// Length of the "@-webkit-decls{" prefix.
static const unsigned prefixLength = 15;
setStyleSheet(contextStyleSheet);
if (styleSourceData) {
m_currentRuleData = CSSRuleSourceData::create();
m_currentRuleData->styleSourceData = CSSStyleSourceData::create();
m_inStyleRuleOrDeclaration = true;
}
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 (m_currentRuleData) {
m_currentRuleData->styleSourceData->styleBodyRange.start = 0;
m_currentRuleData->styleSourceData->styleBodyRange.end = string.length();
for (Vector<CSSPropertySourceData>::iterator it = m_currentRuleData->styleSourceData->propertyData.begin(), endIt = m_currentRuleData->styleSourceData->propertyData.end(); it != endIt; ++it) {
(*it).range.start -= prefixLength;
(*it).range.end -= prefixLength;
}
}
if (styleSourceData) {
*styleSourceData = m_currentRuleData->styleSourceData.release();
m_currentRuleData = 0;
m_inStyleRuleOrDeclaration = false;
}
return ok;
}
PassOwnPtr<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 m_mediaQuery.release();
}
static inline void filterProperties(bool important, const CSSParser::ParsedPropertyVector& input, Vector<CSSProperty, 256>& output, size_t& unusedEntries, BitArray<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;
if (seenProperties.get(propertyIDIndex))
continue;
seenProperties.set(propertyIDIndex);
output[--unusedEntries] = property;
}
}
PassRefPtr<StylePropertySet> CSSParser::createStylePropertySet()
{
BitArray<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 StylePropertySet::createImmutable(results.data(), results.size(), m_context.mode);
}
void CSSParser::addProperty(CSSPropertyID propId, PassRefPtr<CSSValue> value, bool important, bool implicit)
{
m_parsedProperties.append(CSSProperty(propId, value, important, m_currentShorthand, 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;
}
void CSSParser::setStyleSheet(StyleSheetContents* styleSheet)
{
m_styleSheet = styleSheet;
}
KURL CSSParser::completeURL(const CSSParserContext& context, const String& url)
{
if (url.isNull())
return KURL();
if (context.charset.isEmpty())
return KURL(context.baseURL, url);
return KURL(context.baseURL, url, context.charset);
}
KURL CSSParser::completeURL(const String& url) const
{
return completeURL(m_context, url);
}
bool CSSParser::validCalculationUnit(CSSParserValue* value, Units unitflags)
{
bool mustBeNonNegative = unitflags & FNonNeg;
if (!parseCalculation(value, mustBeNonNegative ? CalculationRangeNonNegative : CalculationRangeAll))
return false;
bool b = false;
switch (m_parsedCalculation->category()) {
case CalcLength:
b = (unitflags & FLength);
break;
case CalcPercent:
b = (unitflags & FPercent);
if (b && mustBeNonNegative && m_parsedCalculation->isNegative())
b = false;
break;
case CalcNumber:
b = (unitflags & FNumber);
if (!b && (unitflags & FInteger) && m_parsedCalculation->isInt())
b = true;
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 CalcOther:
break;
}
if (!b)
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)
{
if (isCalculation(value))
return validCalculationUnit(value, unitflags);
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;
break;
case CSSPrimitiveValue::CSS_PERCENTAGE:
b = (unitflags & FPercent);
break;
case CSSParserValue::Q_EMS:
case CSSPrimitiveValue::CSS_EMS:
case CSSPrimitiveValue::CSS_REMS:
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:
b = (unitflags & FLength);
break;
case CSSPrimitiveValue::CSS_MS:
case CSSPrimitiveValue::CSS_S:
b = (unitflags & FTime);
break;
case CSSPrimitiveValue::CSS_DEG:
case CSSPrimitiveValue::CSS_RAD:
case CSSPrimitiveValue::CSS_GRAD:
case CSSPrimitiveValue::CSS_TURN:
b = (unitflags & FAngle);
break;
case CSSPrimitiveValue::CSS_HZ:
case CSSPrimitiveValue::CSS_KHZ:
case CSSPrimitiveValue::CSS_DIMENSION:
default:
break;
}
if (b && unitflags & FNonNeg && value->fValue < 0)
b = false;
return b;
}
inline PassRefPtr<CSSPrimitiveValue> CSSParser::createPrimitiveNumericValue(CSSParserValue* value)
{
if (m_parsedCalculation) {
ASSERT(isCalculation(value));
return CSSPrimitiveValue::create(m_parsedCalculation.release());
}
ASSERT((value->unit >= CSSPrimitiveValue::CSS_NUMBER && value->unit <= CSSPrimitiveValue::CSS_KHZ)
|| (value->unit >= CSSPrimitiveValue::CSS_TURN && value->unit <= CSSPrimitiveValue::CSS_REMS)
|| (value->unit >= CSSPrimitiveValue::CSS_VW && value->unit <= CSSPrimitiveValue::CSS_VMIN));
return cssValuePool().createValue(value->fValue, static_cast<CSSPrimitiveValue::UnitTypes>(value->unit));
}
inline PassRefPtr<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 int unitFromString(CSSParserValue* value)
{
if (value->unit != CSSPrimitiveValue::CSS_IDENT || value->id)
return 0;
if (equal(value->string, "em"))
return CSSPrimitiveValue::CSS_EMS;
if (equal(value->string, "rem"))
return CSSPrimitiveValue::CSS_REMS;
if (equal(value->string, "ex"))
return CSSPrimitiveValue::CSS_EXS;
if (equal(value->string, "px"))
return CSSPrimitiveValue::CSS_PX;
if (equal(value->string, "cm"))
return CSSPrimitiveValue::CSS_CM;
if (equal(value->string, "mm"))
return CSSPrimitiveValue::CSS_MM;
if (equal(value->string, "in"))
return CSSPrimitiveValue::CSS_IN;
if (equal(value->string, "pt"))
return CSSPrimitiveValue::CSS_PT;
if (equal(value->string, "pc"))
return CSSPrimitiveValue::CSS_PC;
if (equal(value->string, "deg"))
return CSSPrimitiveValue::CSS_DEG;
if (equal(value->string, "rad"))
return CSSPrimitiveValue::CSS_RAD;
if (equal(value->string, "grad"))
return CSSPrimitiveValue::CSS_GRAD;
if (equal(value->string, "turn"))
return CSSPrimitiveValue::CSS_TURN;
if (equal(value->string, "ms"))
return CSSPrimitiveValue::CSS_MS;
if (equal(value->string, "s"))
return CSSPrimitiveValue::CSS_S;
if (equal(value->string, "Hz"))
return CSSPrimitiveValue::CSS_HZ;
if (equal(value->string, "kHz"))
return CSSPrimitiveValue::CSS_KHZ;
if (equal(value->string, "vw"))
return CSSPrimitiveValue::CSS_VW;
if (equal(value->string, "vh"))
return CSSPrimitiveValue::CSS_VH;
if (equal(value->string, "vmin"))
return CSSPrimitiveValue::CSS_VMIN;
return 0;
}
static inline bool isComma(CSSParserValue* value)
{
return value && value->unit == CSSParserValue::Operator && value->iValue == ',';
}
void CSSParser::checkForOrphanedUnits()
{
if (inStrictMode() || inShorthand())
return;
// The purpose of this code is to implement the WinIE quirk that allows unit types to be separated from their numeric values
// by whitespace, so e.g., width: 20 px instead of width:20px. This is invalid CSS, so we don't do this in strict mode.
CSSParserValue* numericVal = 0;
unsigned size = m_valueList->size();
for (unsigned i = 0; i < size; i++) {
CSSParserValue* value = m_valueList->valueAt(i);
if (numericVal) {
// Change the unit type of the numeric val to match.
int unit = unitFromString(value);
if (unit) {
numericVal->unit = unit;
numericVal = 0;
// Now delete the bogus unit value.
m_valueList->deleteValueAt(i);
i--; // We're safe even though |i| is unsigned, since we only hit this code if we had a previous numeric value (so |i| is always > 0 here).
size--;
continue;
}
}
numericVal = (value->unit == CSSPrimitiveValue::CSS_NUMBER) ? value : 0;
}
}
inline PassRefPtr<CSSPrimitiveValue> CSSParser::parseValidPrimitive(int 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_REMS)
return createPrimitiveNumericValue(value);
if (value->unit >= CSSPrimitiveValue::CSS_VW && value->unit <= CSSPrimitiveValue::CSS_VMIN)
return createPrimitiveNumericValue(value);
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;
}
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);
int id = value->id;
// In quirks mode, we will look for units that have been incorrectly separated from the number they belong to
// by a space. We go ahead and associate the unit with the number even though it is invalid CSS.
checkForOrphanedUnits();
int num = inShorthand() ? 1 : m_valueList->size();
if (id == CSSValueInherit) {
if (num != 1)
return false;
addProperty(propId, cssValuePool().createInheritedValue(), important);
return true;
}
else if (id == CSSValueInitial) {
if (num != 1)
return false;
addProperty(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;
}
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) | plaintext | inherit
if (id == CSSValueNormal
|| id == CSSValueEmbed
|| id == CSSValueWebkitPlaintext)
validPrimitive = true;
else {
RefPtr<CSSValueList> list = CSSValueList::createSpaceSeparated();
bool isValid = true;
while (isValid && value) {
switch (value->id) {
case CSSValueBidiOverride:
case CSSValueWebkitIsolate:
list->append(cssValuePool().createIdentifierValue(value->id));
break;
default:
isValid = false;
}
value = m_valueList->next();
}
if (list->length() && isValid) {
parsedValue = list.release();
m_valueList->next();
}
}
break;
case CSSPropertyContent: // [ <string> | <uri> | <counter> | attr(X) | open-quote |
// close-quote | no-open-quote | no-close-quote ]+ | inherit
return parseContent(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(CSSPropertyOverflowX, important))
return false;
CSSValue* value = m_parsedProperties.last().value();
addProperty(CSSPropertyOverflowY, value, important);
return true;
}
case CSSPropertyTextAlign:
// left | right | center | justify | webkit_left | webkit_right | webkit_center | webkit_match_parent |
// start | end | <string> | inherit
if ((id >= CSSValueWebkitAuto && id <= CSSValueWebkitMatchParent) || id == CSSValueStart || id == CSSValueEnd
|| value->unit == CSSPrimitiveValue::CSS_STRING)
validPrimitive = true;
break;
case CSSPropertyFontWeight: { // normal | bold | bolder | lighter | 100 | 200 | 300 | 400 | 500 | 600 | 700 | 800 | 900 | inherit
if (m_valueList->size() != 1)
return false;
return parseFontWeight(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;
}
/* nobreak */
case CSSPropertyBackgroundColor: // <color> | inherit
case CSSPropertyBorderTopColor: // <color> | inherit
case CSSPropertyBorderRightColor:
case CSSPropertyBorderBottomColor:
case CSSPropertyBorderLeftColor:
case CSSPropertyWebkitBorderStartColor:
case CSSPropertyWebkitBorderEndColor:
case CSSPropertyWebkitBorderBeforeColor:
case CSSPropertyWebkitBorderAfterColor:
case CSSPropertyColor: // <color> | inherit
case CSSPropertyTextLineThroughColor: // CSS3 text decoration colors
case CSSPropertyTextUnderlineColor:
case CSSPropertyTextOverlineColor:
case CSSPropertyWebkitColumnRuleColor:
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: {
// [<uri>,]* [ 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 | -webkit-zoom-in
// -webkit-zoom-out | all-scroll | -webkit-grab | -webkit-grabbing ] ] | inherit
RefPtr<CSSValueList> list;
while (value && value->unit == CSSPrimitiveValue::CSS_URI) {
if (!list)
list = CSSValueList::createCommaSeparated();
String uri = value->string;
Vector<int> coords;
value = m_valueList->next();
while (value && value->unit == CSSPrimitiveValue::CSS_NUMBER) {
coords.append(int(value->fValue));
value = m_valueList->next();
}
IntPoint hotSpot(-1, -1);
int nrcoords = coords.size();
if (nrcoords > 0 && nrcoords != 2)
return false;
if (nrcoords == 2)
hotSpot = IntPoint(coords[0], coords[1]);
if (!uri.isNull())
list->append(CSSCursorImageValue::create(completeURL(uri), 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 <= CSSValueWebkitGrabbing) || 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 <= CSSValueWebkitGrabbing) || value->id == CSSValueCopy || value->id == CSSValueNone)
validPrimitive = true;
} else {
ASSERT_NOT_REACHED();
return false;
}
break;
}
case CSSPropertyBackgroundAttachment:
case CSSPropertyBackgroundClip:
case CSSPropertyWebkitBackgroundClip:
case CSSPropertyWebkitBackgroundComposite:
case CSSPropertyBackgroundImage:
case CSSPropertyBackgroundOrigin:
case CSSPropertyWebkitBackgroundOrigin:
case CSSPropertyBackgroundPosition:
case CSSPropertyBackgroundPositionX:
case CSSPropertyBackgroundPositionY:
case CSSPropertyBackgroundSize:
case CSSPropertyWebkitBackgroundSize:
case CSSPropertyBackgroundRepeat:
case CSSPropertyBackgroundRepeatX:
case CSSPropertyBackgroundRepeatY:
case CSSPropertyWebkitMaskAttachment:
case CSSPropertyWebkitMaskClip:
case CSSPropertyWebkitMaskComposite:
case CSSPropertyWebkitMaskImage:
case CSSPropertyWebkitMaskOrigin:
case CSSPropertyWebkitMaskPosition:
case CSSPropertyWebkitMaskPositionX:
case CSSPropertyWebkitMaskPositionY:
case CSSPropertyWebkitMaskSize:
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)) {
OwnPtr<ShorthandScope> shorthandScope;
if (propId == CSSPropertyBackgroundPosition ||
propId == CSSPropertyBackgroundRepeat ||
propId == CSSPropertyWebkitMaskPosition ||
propId == CSSPropertyWebkitMaskRepeat) {
shorthandScope = adoptPtr(new 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(m_valueList.get());
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
case CSSPropertyWordSpacing: // normal | <length> | inherit
if (id == CSSValueNormal)
validPrimitive = true;
else
validPrimitive = validUnit(value, FLength);
break;
case CSSPropertyTextIndent: // <length> | <percentage> | inherit
validPrimitive = (!id && validUnit(value, FLength | FPercent));
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 CSSPropertyMaxHeight: // <length> | <percentage> | none | inherit
case CSSPropertyMaxWidth: // <length> | <percentage> | none | inherit
case CSSPropertyWebkitMaxLogicalWidth:
case CSSPropertyWebkitMaxLogicalHeight:
if (id == CSSValueNone) {
validPrimitive = true;
break;
}
/* nobreak */
case CSSPropertyMinHeight: // <length> | <percentage> | inherit
case CSSPropertyMinWidth: // <length> | <percentage> | inherit
case CSSPropertyWebkitMinLogicalWidth:
case CSSPropertyWebkitMinLogicalHeight:
if (id == CSSValueIntrinsic || id == CSSValueMinIntrinsic)
validPrimitive = true;
else
validPrimitive = (!id && validUnit(value, FLength | FPercent | FNonNeg));
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 CSSPropertyHeight: // <length> | <percentage> | auto | inherit
case CSSPropertyWidth: // <length> | <percentage> | auto | inherit
case CSSPropertyWebkitLogicalWidth:
case CSSPropertyWebkitLogicalHeight:
if (id == CSSValueAuto || id == CSSValueIntrinsic || id == CSSValueMinIntrinsic)
validPrimitive = true;
else if (!id && validUnit(value, FLength | FPercent | FNonNeg))
// ### handle multilength case where we allow relative units
validPrimitive = true;
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;
break;
}
/* nobreak */
case CSSPropertyOrphans: // <integer> | inherit
case CSSPropertyWidows: // <integer> | inherit
// ### not supported later on
validPrimitive = (!id && validUnit(value, FInteger, 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 CSSPropertyTextDecoration:
case CSSPropertyWebkitTextDecorationsInEffect:
// none | [ underline || overline || line-through || blink ] | inherit
if (id == CSSValueNone) {
validPrimitive = true;
} else {
RefPtr<CSSValueList> list = CSSValueList::createSpaceSeparated();
bool isValid = true;
while (isValid && value) {
switch (value->id) {
case CSSValueBlink:
break;
case CSSValueUnderline:
case CSSValueOverline:
case CSSValueLineThrough:
list->append(cssValuePool().createIdentifierValue(value->id));
break;
default:
isValid = false;
}
value = m_valueList->next();
}
if (list->length() && isValid) {
parsedValue = list.release();
m_valueList->next();
}
}
break;
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, 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;
RefPtr<Pair> pair = Pair::create(parsedValue1.release(), parsedValue2.release());
RefPtr<CSSPrimitiveValue> val = cssValuePool().createValue(pair.release());
addProperty(propId, val.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 | FPercent);
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 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;
#if ENABLE(CSS_FILTERS)
case CSSPropertyWebkitFilter:
if (id == CSSValueNone)
validPrimitive = true;
else {
RefPtr<CSSValue> val = parseFilter();
if (val) {
addProperty(propId, val, important);
return true;
}
return false;
}
break;
#endif
#if ENABLE(CSS3_FLEXBOX)
case CSSPropertyWebkitFlex:
if (id == CSSValueNone)
validPrimitive = true;
else
parsedValue = parseFlex(m_valueList.get());
break;
case CSSPropertyWebkitOrder:
validPrimitive = validUnit(value, FNumber);
break;
#endif
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 {
PassRefPtr<CSSValue> val = parseTransform();
if (val) {
addProperty(propId, val, 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 CSSPropertyWebkitTransitionDelay:
case CSSPropertyWebkitTransitionDuration:
case CSSPropertyWebkitTransitionTimingFunction:
case CSSPropertyWebkitTransitionProperty: {
RefPtr<CSSValue> val;
if (parseAnimationProperty(propId, val)) {
addProperty(propId, val.release(), important);
return true;
}
return false;
}
case CSSPropertyWebkitGridColumns:
case CSSPropertyWebkitGridRows:
if (!cssGridLayoutEnabled())
return false;
return parseGridTrackList(propId, important);
case CSSPropertyWebkitGridColumn:
case CSSPropertyWebkitGridRow:
if (!cssGridLayoutEnabled())
return false;
validPrimitive = id == CSSValueAuto || validUnit(value, FInteger);
break;
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, FInteger | FNonNeg, 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 CSSPropertyWebkitColumnSpan: // all | 1
if (id == CSSValueAll)
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, CSSStrictMode);
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;
case CSSPropertyWebkitFontSizeDelta: // <length>
validPrimitive = validUnit(value, FLength);
break;
case CSSPropertyWebkitHighlight:
if (id == CSSValueNone || value->unit == CSSPrimitiveValue::CSS_STRING)
validPrimitive = true;
break;
case CSSPropertyWebkitHyphenateCharacter:
if (id == CSSValueAuto || value->unit == CSSPrimitiveValue::CSS_STRING)
validPrimitive = true;
break;
case 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
// End Apple-specific properties
#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
/* 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, CSSPropertyWebkitMaskRepeat,
CSSPropertyWebkitMaskAttachment, CSSPropertyWebkitMaskPosition,
CSSPropertyWebkitMaskOrigin, CSSPropertyWebkitMaskClip };
return parseFillShorthand(propId, properties, 6, 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.
addProperty(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);
#if ENABLE(CSS3_FLEXBOX)
case CSSPropertyWebkitFlexFlow:
return parseShorthand(propId, webkitFlexFlowShorthand(), important);
#endif
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 CSSPropertyWebkitTransition:
return parseTransitionShorthand(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 CSSPropertyWebkitTextOrientation:
// FIXME: For now just support upright and vertical-right.
if (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;
#if ENABLE(CSS_EXCLUSIONS)
case CSSPropertyWebkitShapeInside:
case CSSPropertyWebkitShapeOutside:
if (!RuntimeEnabledFeatures::cssExclusionsEnabled())
return false;
if (id == CSSValueAuto)
validPrimitive = true;
else if (value->unit == CSSParserValue::Function)
return parseExclusionShape((propId == CSSPropertyWebkitShapeInside), important);
break;
case CSSPropertyWebkitWrapMargin:
case CSSPropertyWebkitWrapPadding:
validPrimitive = (RuntimeEnabledFeatures::cssExclusionsEnabled() && !id && validUnit(value, FLength | FNonNeg));
break;
case CSSPropertyWebkitWrap:
return RuntimeEnabledFeatures::cssExclusionsEnabled() && parseShorthand(propId, webkitWrapShorthand(), important);
#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 CSSPropertyOutlineStyle:
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:
case CSSPropertyWebkitBoxDecorationBreak:
case CSSPropertyWebkitBoxDirection:
case CSSPropertyWebkitBoxLines:
case CSSPropertyWebkitBoxOrient:
case CSSPropertyWebkitBoxPack:
case CSSPropertyWebkitColorCorrection:
case CSSPropertyWebkitColumnBreakAfter:
case CSSPropertyWebkitColumnBreakBefore:
case CSSPropertyWebkitColumnBreakInside:
case CSSPropertyWebkitColumnRuleStyle:
#if ENABLE(CSS3_FLEXBOX)
case CSSPropertyWebkitAlignContent:
case CSSPropertyWebkitAlignItems:
case CSSPropertyWebkitAlignSelf:
case CSSPropertyWebkitFlexDirection:
case CSSPropertyWebkitFlexWrap:
case CSSPropertyWebkitJustifyContent:
#endif
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 CSSPropertyWebkitMatchNearestMailBlockquoteColor:
case CSSPropertyWebkitNbspMode:
#if ENABLE(OVERFLOW_SCROLLING)
case CSSPropertyWebkitOverflowScrolling:
#endif
case CSSPropertyWebkitPrintColorAdjust:
#if ENABLE(CSS_REGIONS)
case CSSPropertyWebkitRegionBreakAfter:
case CSSPropertyWebkitRegionBreakBefore:
case CSSPropertyWebkitRegionBreakInside:
case CSSPropertyWebkitRegionOverflow:
#endif
case CSSPropertyWebkitRtlOrdering:
case CSSPropertyWebkitTextCombine:
case CSSPropertyWebkitTextEmphasisPosition:
case CSSPropertyWebkitTextSecurity:
case CSSPropertyWebkitTextSizeAdjust:
case CSSPropertyWebkitTransformStyle:
case CSSPropertyWebkitUserDrag:
case CSSPropertyWebkitUserModify:
case CSSPropertyWebkitUserSelect:
#if ENABLE(CSS_EXCLUSIONS)
case CSSPropertyWebkitWrapFlow:
case CSSPropertyWebkitWrapThrough:
#endif
case CSSPropertyWebkitWritingMode:
case CSSPropertyWhiteSpace:
case CSSPropertyWordBreak:
case CSSPropertyWordWrap:
// These properties should be handled before in isValidKeywordPropertyAndValue().
ASSERT_NOT_REACHED();
return false;
#if ENABLE(SVG)
default:
return parseSVGValue(propId, important);
#endif
}
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, PassRefPtr<CSSValue> rval)
{
if (lval) {
if (lval->isValueList())
static_cast<CSSValueList*>(lval.get())->append(rval);
else {
PassRefPtr<CSSValue> oldlVal(lval.release());
PassRefPtr<CSSValueList> list = CSSValueList::createCommaSeparated();
list->append(oldlVal);
list->append(rval);
lval = list;
}
}
else
lval = rval;
}
static bool parseBackgroundClip(CSSParserValue* parserValue, RefPtr<CSSValue>& cssValue)
{
if (parserValue->id == CSSValueBorderBox || parserValue->id == CSSValuePaddingBox
|| parserValue->id == CSSValueContentBox || parserValue->id == CSSValueWebkitText) {
cssValue = cssValuePool().createIdentifierValue(parserValue->id);
return true;
}
return false;
}
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 foundBackgroundPositionCSSProperty = 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 backgroundSizeCSSPropertyExpected = false;
if ((val->unit == CSSParserValue::Operator && val->iValue == '/') && foundBackgroundPositionCSSProperty) {
backgroundSizeCSSPropertyExpected = true;
m_valueList->next();
}
foundBackgroundPositionCSSProperty = false;
bool found = false;
for (i = 0; !found && i < numProperties; ++i) {
if (backgroundSizeCSSPropertyExpected && properties[i] != CSSPropertyBackgroundSize)
continue;
if (!backgroundSizeCSSPropertyExpected && properties[i] == CSSPropertyBackgroundSize)
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.release());
if (properties[i] == CSSPropertyBackgroundPosition || properties[i] == CSSPropertyWebkitMaskPosition)
addFillValue(positionYValue, val2.release());
if (properties[i] == CSSPropertyBackgroundRepeat || properties[i] == CSSPropertyWebkitMaskRepeat)
addFillValue(repeatYValue, val2.release());
if (properties[i] == CSSPropertyBackgroundOrigin || properties[i] == CSSPropertyWebkitMaskOrigin) {
// Reparse the value as a clip, and see if we succeed.
if (parseBackgroundClip(parserValue, val1))
addFillValue(clipValue, val1.release()); // The property parsed successfully.
else
addFillValue(clipValue, cssValuePool().createImplicitInitialValue()); // Some value was used for origin that is not supported by clip. Just reset clip instead.
}
if (properties[i] == CSSPropertyBackgroundClip || properties[i] == CSSPropertyWebkitMaskClip) {
// Update clipValue
addFillValue(clipValue, val1.release());
foundClip = true;
}
if (properties[i] == CSSPropertyBackgroundPosition)
foundBackgroundPositionCSSProperty = 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
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, PassRefPtr<CSSValue> rval)
{
if (lval) {
if (lval->isValueList())
static_cast<CSSValueList*>(lval.get())->append(rval);
else {
PassRefPtr<CSSValue> oldVal(lval.release());
PassRefPtr<CSSValueList> list = CSSValueList::createCommaSeparated();
list->append(oldVal);
list->append(rval);
lval = list;
}
}
else
lval = rval;
}
bool CSSParser::parseAnimationShorthand(bool important)
{
const unsigned numProperties = webkitAnimationShorthand().length();
ShorthandScope scope(this, CSSPropertyWebkitAnimation);
bool parsedProperty[] = { false, false, false, false, false, false, false };
RefPtr<CSSValue> values[7];
unsigned i;
unsigned initialParsedPropertyIndex = 0;
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.
initialParsedPropertyIndex = 0;
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;
}
bool found = false;
for (i = initialParsedPropertyIndex; !found && i < numProperties; ++i) {
if (!parsedProperty[i]) {
RefPtr<CSSValue> val;
if (parseAnimationProperty(webkitAnimationShorthand().properties()[i], val)) {
parsedProperty[i] = found = true;
initialParsedPropertyIndex = 1;
addAnimationValue(values[i], val.release());
}
}
}
// 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++)
addProperty(webkitAnimationShorthand().properties()[i], values[i].release(), important);
return true;
}
bool CSSParser::parseTransitionShorthand(bool important)
{
const unsigned numProperties = webkitTransitionShorthand().length();
ShorthandScope scope(this, CSSPropertyWebkitTransition);
bool parsedProperty[] = { false, false, false, false };
RefPtr<CSSValue> values[4];
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;
}
bool found = false;
for (i = 0; !found && i < numProperties; ++i) {
if (!parsedProperty[i]) {
RefPtr<CSSValue> val;
if (parseAnimationProperty(webkitTransitionShorthand().properties()[i], val)) {
parsedProperty[i] = found = true;
addAnimationValue(values[i], val.release());
}
}
}
// 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++)
addProperty(webkitTransitionShorthand().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* const* const propertiesForInitialization = shorthand.propertiesForInitialization();
for (unsigned i = 0; i < shorthand.length(); ++i) {
if (propertyFound[i])
continue;
if (propertiesForInitialization) {
const StylePropertyShorthand& initProperties = *(propertiesForInitialization[i]);
for (unsigned propIndex = 0; propIndex < initProperties.length(); ++propIndex)
addProperty(initProperties.properties()[propIndex], cssValuePool().createImplicitInitialValue(), 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.
*/
int num = inShorthand() ? 1 : m_valueList->size();
ShorthandScope scope(this, propId);
// the order is top, right, bottom, left
switch (num) {
case 1: {
if (!parseValue(properties[0], 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()) {
RefPtr<CSSValue> parsedValue;
if (val->unit == CSSPrimitiveValue::CSS_STRING)
parsedValue = CSSPrimitiveValue::create(val->string, CSSPrimitiveValue::CSS_STRING);
else
break;
values->append(parsedValue.release());
m_valueList->next();
}
if (values->length()) {
addProperty(propId, values.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(m_valueList.get());
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);
}
} else if (val->unit == CSSPrimitiveValue::CSS_STRING) {
parsedValue = createPrimitiveStringValue(val);
}
if (!parsedValue)
break;
values->append(parsedValue.release());
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()
{
int 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(m_valueList.get());
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<CSSValue> CSSParser::parseFillPositionComponent(CSSParserValueList* valueList, unsigned& cumulativeFlags, FillPositionFlag& individualFlag)
{
int 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;
}
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;
}
void CSSParser::parseFillPosition(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)
{
int 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(static_cast<CSSPrimitiveValue*>(value1.get())->getIdent());
}
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 cssValuePool().createValue(Pair::create(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:
case CSSPropertyWebkitMaskAttachment:
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) || val->id == CSSValueHighlight) {
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;
}
default:
break;
}
if (!currValue)
return false;
if (value && !values) {
values = CSSValueList::createCommaSeparated();
values->append(value.release());
}
if (value2 && !values2) {
values2 = CSSValueList::createCommaSeparated();
values2->append(value2.release());
}
if (values)
values->append(currValue.release());
else
value = currValue.release();
if (currValue2) {
if (values2)
values2->append(currValue2.release());
else
value2 = currValue2.release();
}
}
// When parsing any fill shorthand property, we let it handle building up the lists for all
// properties.
if (inShorthand())
break;
}
if (values && values->length()) {
retValue1 = values.release();
if (values2 && values2->length())
retValue2 = values2.release();
return true;
}
if (value) {
retValue1 = value.release();
retValue2 = value2.release();
return true;
}
return false;
}
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->string, "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()
{
CSSParserValue* value = m_valueList->current();
if (value->unit != CSSPrimitiveValue::CSS_IDENT)
return 0;
int result = cssPropertyID(value->string);
if (result)
return cssValuePool().createIdentifierValue(result);
if (equalIgnoringCase(value->string, "all"))
return cssValuePool().createIdentifierValue(CSSValueAll);
if (equalIgnoringCase(value->string, "none"))
return cssValuePool().createIdentifierValue(CSSValueNone);
return 0;
}
bool CSSParser::parseTransformOriginShorthand(RefPtr<CSSValue>& value1, RefPtr<CSSValue>& value2, RefPtr<CSSValue>& value3)
{
parseFillPosition(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 = v->fValue;
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 values must be between 0 and 1.
double x1, y1, x2, y2;
if (!parseCubicBezierTimingFunctionValue(args, x1))
return 0;
if (!parseCubicBezierTimingFunctionValue(args, y1))
return 0;
if (!parseCubicBezierTimingFunctionValue(args, x2))
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)
{
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 CSSPropertyWebkitTransitionDelay:
currValue = parseAnimationDelay();
if (currValue)
m_valueList->next();
break;
case CSSPropertyWebkitAnimationDirection:
currValue = parseAnimationDirection();
if (currValue)
m_valueList->next();
break;
case CSSPropertyWebkitAnimationDuration:
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 CSSPropertyWebkitTransitionProperty:
currValue = parseAnimationProperty();
if (currValue)
m_valueList->next();
break;
case CSSPropertyWebkitAnimationTimingFunction:
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.release());
}
if (values)
values->append(currValue.release());
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;
}
bool CSSParser::parseGridTrackList(CSSPropertyID propId, bool important)
{
CSSParserValue* value = m_valueList->current();
if (value->id == CSSValueNone) {
if (m_valueList->next())
return false;
addProperty(propId, cssValuePool().createIdentifierValue(value->id), important);
return true;
}
RefPtr<CSSValueList> values = CSSValueList::createSpaceSeparated();
while (value) {
bool valid = validUnit(value, FLength | FPercent) || value->id == CSSValueAuto;
if (!valid)
return false;
RefPtr<CSSPrimitiveValue> primitiveValue = value->id == CSSValueAuto ? cssValuePool().createIdentifierValue(CSSValueAuto) : createPrimitiveNumericValue(value);
values->append(primitiveValue.release());
value = m_valueList->next();
}
addProperty(propId, values.release(), important);
return true;
}
#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:
// 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->string, "circle"))
region->m_isCircle = true;
else if (equalIgnoringCase(arg->string, "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) */
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;
int listStyleID = 0;
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;
}
#if ENABLE(CSS_EXCLUSIONS)
PassRefPtr<CSSWrapShape> CSSParser::parseExclusionShapeRectangle(CSSParserValueList* args)
{
ASSERT(args);
// rect(x, y, width, height, [[rx], ry])
if (args->size() != 7 && args->size() != 9 && args->size() != 11)
return 0;
RefPtr<CSSWrapShapeRectangle> shape = CSSWrapShapeRectangle::create();
unsigned argumentNumber = 0;
CSSParserValue* argument = args->current();
while (argument) {
if (!validUnit(argument, FLength))
return 0;
RefPtr<CSSPrimitiveValue> length = createPrimitiveNumericValue(argument);
ASSERT(argumentNumber < 6);
switch (argumentNumber) {
case 0:
shape->setLeft(length);
break;
case 1:
shape->setTop(length);
break;
case 2:
shape->setWidth(length);
break;
case 3:
shape->setHeight(length);
break;
case 4:
shape->setRadiusX(length);
break;
case 5:
shape->setRadiusY(length);
break;
}
argument = args->next();
if (argument) {
if (argument->unit != CSSParserValue::Operator || argument->iValue != ',')
return 0;
argument = args->next();
}
argumentNumber++;
}
if (argumentNumber < 4)
return 0;
return shape;
}
PassRefPtr<CSSWrapShape> CSSParser::parseExclusionShapeCircle(CSSParserValueList* args)
{
ASSERT(args);
// circle(x, y, r)
if (args->size() != 5)
return 0;
RefPtr<CSSWrapShapeCircle> shape = CSSWrapShapeCircle::create();
unsigned argumentNumber = 0;
CSSParserValue* argument = args->current();
while (argument) {
if (!validUnit(argument, FLength))
return 0;
RefPtr<CSSPrimitiveValue> length = createPrimitiveNumericValue(argument);
ASSERT(argumentNumber < 3);
switch (argumentNumber) {
case 0:
shape->setLeft(length);
break;
case 1:
shape->setTop(length);
break;
case 2:
shape->setRadius(length);
break;
}
argument = args->next();
if (argument) {
if (argument->unit != CSSParserValue::Operator || argument->iValue != ',')
return 0;
argument = args->next();
}
argumentNumber++;
}
if (argumentNumber < 3)
return 0;
return shape;
}
PassRefPtr<CSSWrapShape> CSSParser::parseExclusionShapeEllipse(CSSParserValueList* args)
{
ASSERT(args);
// ellipse(x, y, rx, ry)
if (args->size() != 7)
return 0;
RefPtr<CSSWrapShapeEllipse> shape = CSSWrapShapeEllipse::create();
unsigned argumentNumber = 0;
CSSParserValue* argument = args->current();
while (argument) {
if (!validUnit(argument, FLength))
return 0;
RefPtr<CSSPrimitiveValue> length = createPrimitiveNumericValue(argument);
ASSERT(argumentNumber < 4);
switch (argumentNumber) {
case 0:
shape->setLeft(length);
break;
case 1:
shape->setTop(length);
break;
case 2:
shape->setRadiusX(length);
break;
case 3:
shape->setRadiusY(length);
break;
}
argument = args->next();
if (argument) {
if (argument->unit != CSSParserValue::Operator || argument->iValue != ',')
return 0;
argument = args->next();
}
argumentNumber++;
}
if (argumentNumber < 4)
return 0;
return shape;
}
PassRefPtr<CSSWrapShape> CSSParser::parseExclusionShapePolygon(CSSParserValueList* args)
{
ASSERT(args);
unsigned size = args->size();
if (!size)
return 0;
RefPtr<CSSWrapShapePolygon> shape = CSSWrapShapePolygon::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))
return 0;
CSSParserValue* argumentY = args->next();
if (!argumentY || !validUnit(argumentY, FLength))
return 0;
RefPtr<CSSPrimitiveValue> xLength = createPrimitiveNumericValue(argumentX);
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;
}
bool CSSParser::parseExclusionShape(bool shapeInside, bool important)
{
CSSParserValue* value = m_valueList->current();
CSSParserValueList* args = value->function->args.get();
if (!args)
return false;
RefPtr<CSSWrapShape> shape;
if (equalIgnoringCase(value->function->name, "rectangle("))
shape = parseExclusionShapeRectangle(args);
else if (equalIgnoringCase(value->function->name, "circle("))
shape = parseExclusionShapeCircle(args);
else if (equalIgnoringCase(value->function->name, "ellipse("))
shape = parseExclusionShapeEllipse(args);
else if (equalIgnoringCase(value->function->name, "polygon("))
shape = parseExclusionShapePolygon(args);
if (shape) {
addProperty(shapeInside ? CSSPropertyWebkitShapeInside : CSSPropertyWebkitShapeOutside, cssValuePool().createValue(shape.release()), important);
m_valueList->next();
return true;
}
return false;
}
#endif
// [ '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 (value->unit == CSSParserValue::Operator && value->iValue == '/') {
// 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(' ');
m_builder.append(string.characters, 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) {
if (value->id == CSSValueInitial || value->id == CSSValueInherit)
return 0;
CSSParserValue* nextValue = m_valueList->next();
bool nextValBreaksFont = !nextValue ||
(nextValue->unit == CSSParserValue::Operator && nextValue->iValue == ',');
bool nextValIsFontName = nextValue &&
((nextValue->id >= CSSValueSerif && nextValue->id <= CSSValueWebkitBody) ||
(nextValue->unit == CSSPrimitiveValue::CSS_STRING || nextValue->unit == CSSPrimitiveValue::CSS_IDENT));
if (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();
int 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();
int 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.release());
else {
addProperty(CSSPropertyFontVariant, parsedValue.release(), important);
return true;
}
}
if (values && values->length()) {
m_hasFontFaceOnlyValues = true;
addProperty(CSSPropertyFontVariant, values.release(), important);
return true;
}
return false;
}
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(CSSValue100 + weight / 100 - 1), 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.release());
return true;
}
if (value->unit == CSSParserValue::Operator && value->iValue == ',') {
m_valueList->next();
valueList->append(uriValue.release());
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.release());
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
static int checkForValidDouble(const UChar* string, const UChar* 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
static int parseDouble(const UChar* string, const UChar* 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;
}
static bool parseColorIntOrPercentage(const UChar*& string, const UChar* end, const char terminator, CSSPrimitiveValue::UnitTypes& expect, int& value)
{
const UChar* 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;
}
static inline bool isTenthAlpha(const UChar* 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;
}
static inline bool parseAlphaValue(const UChar*& string, const UChar* 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)
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;
}
static inline bool mightBeRGBA(const UChar* 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');
}
static inline bool mightBeRGB(const UChar* characters, unsigned length)
{
if (length < 4)
return false;
return characters[3] == '('
&& isASCIIAlphaCaselessEqual(characters[0], 'r')
&& isASCIIAlphaCaselessEqual(characters[1], 'g')
&& isASCIIAlphaCaselessEqual(characters[2], 'b');
}
bool CSSParser::fastParseColor(RGBA32& rgb, const String& name, bool strict)
{
const UChar* characters = name.characters();
unsigned length = name.length();
CSSPrimitiveValue::UnitTypes expect = CSSPrimitiveValue::CSS_UNKNOWN;
if (!strict && length >= 3) {
if (name[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 UChar* current = characters + 5;
const UChar* 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 UChar* current = characters + 4;
const UChar* 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;
}
// 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, "-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>(max(0.0, min(1.0, 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] = max(0.0, min(100.0, 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] = max(0.0, min(1.0, 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(ShadowValue::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;
#if ENABLE(SVG)
// -webkit-svg-shadow does not support multiple values.
if (propId == CSSPropertyWebkitSvgShadow)
return 0;
#endif
// 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;
// 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();
CSSReflectionDirection direction;
switch (val->id) {
case CSSValueAbove:
direction = ReflectionAbove;
break;
case CSSValueBelow:
direction = ReflectionBelow;
break;
case CSSValueLeft:
direction = ReflectionLeft;
break;
case CSSValueRight:
direction = ReflectionRight;
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;
}
RefPtr<CSSReflectValue> reflectValue = CSSReflectValue::create(direction, offset.release(), mask.release());
addProperty(propId, reflectValue.release(), important);
m_valueList->next();
return true;
}
#if ENABLE(CSS3_FLEXBOX)
PassRefPtr<CSSValue> CSSParser::parseFlex(CSSParserValueList* args)
{
if (!args || !args->size() || args->size() > 3)
return 0;
static const double unsetValue = -1;
double positiveFlex = unsetValue;
double negativeFlex = unsetValue;
RefPtr<CSSPrimitiveValue> preferredSize;
while (CSSParserValue* arg = args->current()) {
if (validUnit(arg, FNumber | FNonNeg)) {
if (positiveFlex == unsetValue)
positiveFlex = arg->fValue;
else if (negativeFlex == unsetValue)
negativeFlex = arg->fValue;
else if (!arg->fValue) {
// flex() only allows a preferred size of 0 (sans units) if the positive and negative flex values have already been set.
preferredSize = 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 0;
}
} else if (!preferredSize && (arg->id == CSSValueAuto || validUnit(arg, FLength | FPercent | FNonNeg)))
preferredSize = parseValidPrimitive(arg->id, arg);
else {
// Not a valid arg for flex().
return 0;
}
args->next();
}
if (positiveFlex == unsetValue)
positiveFlex = 0;
if (negativeFlex == unsetValue)
negativeFlex = 1;
if (!preferredSize)
preferredSize = cssValuePool().createValue(0, CSSPrimitiveValue::CSS_PX);
RefPtr<CSSValueList> flex = CSSValueList::createSpaceSeparated();
flex->append(cssValuePool().createValue(clampToFloat(positiveFlex), CSSPrimitiveValue::CSS_NUMBER));
flex->append(cssValuePool().createValue(clampToFloat(negativeFlex), CSSPrimitiveValue::CSS_NUMBER));
flex->append(preferredSize);
return flex;
}
#endif
struct BorderImageParseContext {
BorderImageParseContext()
: m_canAdvance(false)
, m_allowCommit(true)
, m_allowImage(true)
, m_allowImageSlice(true)
, m_allowRepeat(true)
, m_allowSlash(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 allowSlash() const { return m_allowSlash; }
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_allowSlash = 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_allowSlash = true;
m_allowImageSlice = m_requireWidth = m_requireOutset = false;
m_allowImage = !m_image;
m_allowRepeat = !m_repeat;
}
void commitSlash()
{
m_canAdvance = true;
m_allowCommit = m_allowImage = m_allowImageSlice = m_allowRepeat = m_allowSlash = 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_allowSlash = 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_allowSlash = 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_allowSlash = 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_allowSlash;
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.allowSlash() && val->unit == CSSParserValue::Operator && val->iValue == '/')
context.commitSlash();
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);
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(m_valueList.get());
if (value)
context.commitImage(value);
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);
}
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 (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();
}
} else
secondValue = firstValue;
result = cssValuePool().createValue(Pair::create(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);
}
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];
}
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, cssValuePool().createValue(Pair::create(radii[0][0].release(), radii[1][0].release())), important);
addProperty(CSSPropertyBorderTopRightRadius, cssValuePool().createValue(Pair::create(radii[0][1].release(), radii[1][1].release())), important);
addProperty(CSSPropertyBorderBottomRightRadius, cssValuePool().createValue(Pair::create(radii[0][2].release(), radii[1][2].release())), important);
addProperty(CSSPropertyBorderBottomLeftRadius, cssValuePool().createValue(Pair::create(radii[0][3].release(), radii[1][3].release())), important);
return true;
}
bool CSSParser::parseAspectRatio(bool important)
{
unsigned num = m_valueList->size();
if (num == 1 && m_valueList->valueAt(0)->id == CSSValueNone) {
addProperty(CSSPropertyWebkitAspectRatio, cssValuePool().createIdentifierValue(CSSValueNone), 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 (op->unit != CSSParserValue::Operator || op->iValue != '/')
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(cssValuePool().createValue(Pair::create(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->string, "left") && horizontal)
|| (equalIgnoringCase(a->string, "top") && !horizontal))
result = cssValuePool().createValue(0., CSSPrimitiveValue::CSS_PERCENTAGE);
else if ((equalIgnoringCase(a->string, "right") && horizontal)
|| (equalIgnoringCase(a->string, "bottom") && !horizontal))
result = cssValuePool().createValue(100., CSSPrimitiveValue::CSS_PERCENTAGE);
else if (equalIgnoringCase(a->string, "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);
int 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();
int 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->string, "linear"))
gradientType = CSSLinearGradient;
else if (equalIgnoringCase(a->string, "radial"))
gradientType = CSSRadialGradient;
else
return false;
RefPtr<CSSGradientValue> result;
switch (gradientType) {
case CSSLinearGradient:
result = CSSLinearGradientValue::create(NonRepeating, true);
break;
case CSSRadialGradient:
result = CSSRadialGradientValue::create(NonRepeating, true);
break;
}
// 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 == CSSRadialGradient) {
a = args->next();
if (!a || a->unit != CSSPrimitiveValue::CSS_NUMBER)
return false;
static_cast<CSSRadialGradientValue*>(result.get())->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 == CSSRadialGradient) {
// 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;
static_cast<CSSRadialGradientValue*>(result.get())->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)
{
int id = value->id;
if (id == CSSValueWebkitText || (id >= CSSValueAqua && id <= CSSValueWindowtext) || id == CSSValueMenu || id == CSSValueCurrentcolor)
return cssValuePool().createIdentifierValue(id);
return p->parseColor(value);
}
bool CSSParser::parseLinearGradient(CSSParserValueList* valueList, RefPtr<CSSValue>& gradient, CSSGradientRepeat repeating)
{
RefPtr<CSSLinearGradientValue> result = CSSLinearGradientValue::create(repeating);
// 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;
Vector<CSSGradientColorStop>& stops = result->stops();
if (stops.isEmpty())
return false;
gradient = result.release();
return true;
}
bool CSSParser::parseRadialGradient(CSSParserValueList* valueList, RefPtr<CSSValue>& gradient, CSSGradientRepeat repeating)
{
RefPtr<CSSRadialGradientValue> result = CSSRadialGradientValue::create(repeating);
// 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;
// parseFillPosition advances the args next pointer.
parseFillPosition(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;
}
ASSERT(!centerX || centerX->isPrimitiveValue());
ASSERT(!centerY || centerY->isPrimitiveValue());
result->setFirstX(static_cast<CSSPrimitiveValue*>(centerX.get()));
result->setSecondX(static_cast<CSSPrimitiveValue*>(centerX.get()));
// CSS3 radial gradients always share the same start and end point.
result->setFirstY(static_cast<CSSPrimitiveValue*>(centerY.get()));
result->setSecondY(static_cast<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;
}
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::parseGradientColorStops(CSSParserValueList* valueList, CSSGradientValue* gradient, bool expectComma)
{
CSSParserValue* a = valueList->current();
// Now look for color stops.
while (a) {
// Look for the comma before the next stop.
if (expectComma) {
if (!isComma(a))
return false;
a = valueList->next();
if (!a)
return false;
}
// <color-stop> = <color> [ <percentage> | <length> ]?
CSSGradientColorStop stop;
stop.m_color = parseGradientColorOrKeyword(this, a);
if (!stop.m_color)
return false;
a = valueList->next();
if (a) {
if (validUnit(a, FLength | FPercent)) {
stop.m_position = createPrimitiveNumericValue(a);
a = valueList->next();
}
}
gradient->addStop(stop);
expectComma = true;
}
// Must have 2 or more stops to be valid.
return gradient->stops().size() > 1;
}
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, "-webkit-repeating-linear-gradient(")
|| equalIgnoringCase(val->function->name, "-webkit-radial-gradient(")
|| equalIgnoringCase(val->function->name, "-webkit-repeating-radial-gradient(")
|| equalIgnoringCase(val->function->name, "-webkit-canvas(")
|| equalIgnoringCase(val->function->name, "-webkit-cross-fade(");
}
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 parseLinearGradient(valueList, value, NonRepeating);
if (equalIgnoringCase(val->function->name, "-webkit-repeating-linear-gradient("))
return parseLinearGradient(valueList, value, Repeating);
if (equalIgnoringCase(val->function->name, "-webkit-radial-gradient("))
return parseRadialGradient(valueList, value, NonRepeating);
if (equalIgnoringCase(val->function->name, "-webkit-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);
return false;
}
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_SET)
PassRefPtr<CSSValue> CSSParser::parseImageSet(CSSParserValueList* valueList)
{
CSSParserValue* function = valueList->current();
if (function->unit != CSSParserValue::Function)
return 0;
CSSParserValueList* functionArgs = valueList->current()->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;
RefPtr<CSSImageValue> image = CSSImageValue::create(completeURL(arg->string));
imageSet->append(image);
arg = functionArgs->next();
if (!arg || arg->unit != CSSPrimitiveValue::CSS_DIMENSION)
return 0;
double imageScaleFactor = 0;
const String& string = arg->string;
const UChar* current = string.characters();
const UChar* end = current + string.length();
parseDouble(current, end, '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;
}
#endif
class TransformOperationInfo {
public:
TransformOperationInfo(const CSSParserString& name)
: m_type(WebKitCSSTransformValue::UnknownTransformOperation)
, m_argCount(1)
, m_allowSingleArgument(false)
, m_unit(CSSParser::FUnknown)
{
if (equalIgnoringCase(name, "scale(") || equalIgnoringCase(name, "scalex(") || equalIgnoringCase(name, "scaley(") || equalIgnoringCase(name, "scalez(")) {
m_unit = CSSParser::FNumber;
if (equalIgnoringCase(name, "scale("))
m_type = WebKitCSSTransformValue::ScaleTransformOperation;
else if (equalIgnoringCase(name, "scalex("))
m_type = WebKitCSSTransformValue::ScaleXTransformOperation;
else if (equalIgnoringCase(name, "scaley("))
m_type = WebKitCSSTransformValue::ScaleYTransformOperation;
else
m_type = WebKitCSSTransformValue::ScaleZTransformOperation;
} else if (equalIgnoringCase(name, "scale3d(")) {
m_type = WebKitCSSTransformValue::Scale3DTransformOperation;
m_argCount = 5;
m_unit = CSSParser::FNumber;
} else if (equalIgnoringCase(name, "rotate(")) {
m_type = WebKitCSSTransformValue::RotateTransformOperation;
m_unit = CSSParser::FAngle;
} else if (equalIgnoringCase(name, "rotatex(") ||
equalIgnoringCase(name, "rotatey(") ||
equalIgnoringCase(name, "rotatez(")) {
m_unit = CSSParser::FAngle;
if (equalIgnoringCase(name, "rotatex("))
m_type = WebKitCSSTransformValue::RotateXTransformOperation;
else if (equalIgnoringCase(name, "rotatey("))
m_type = WebKitCSSTransformValue::RotateYTransformOperation;
else
m_type = WebKitCSSTransformValue::RotateZTransformOperation;
} else if (equalIgnoringCase(name, "rotate3d(")) {
m_type = WebKitCSSTransformValue::Rotate3DTransformOperation;
m_argCount = 7;
m_unit = CSSParser::FNumber;
} else if (equalIgnoringCase(name, "skew(") || equalIgnoringCase(name, "skewx(") || equalIgnoringCase(name, "skewy(")) {
m_unit = CSSParser::FAngle;
if (equalIgnoringCase(name, "skew("))
m_type = WebKitCSSTransformValue::SkewTransformOperation;
else if (equalIgnoringCase(name, "skewx("))
m_type = WebKitCSSTransformValue::SkewXTransformOperation;
else
m_type = WebKitCSSTransformValue::SkewYTransformOperation;
} else if (equalIgnoringCase(name, "translate(") || equalIgnoringCase(name, "translatex(") || equalIgnoringCase(name, "translatey(") || equalIgnoringCase(name, "translatez(")) {
m_unit = CSSParser::FLength | CSSParser::FPercent;
if (equalIgnoringCase(name, "translate("))
m_type = WebKitCSSTransformValue::TranslateTransformOperation;
else if (equalIgnoringCase(name, "translatex("))
m_type = WebKitCSSTransformValue::TranslateXTransformOperation;
else if (equalIgnoringCase(name, "translatey("))
m_type = WebKitCSSTransformValue::TranslateYTransformOperation;
else
m_type = WebKitCSSTransformValue::TranslateZTransformOperation;
} else if (equalIgnoringCase(name, "translate3d(")) {
m_type = WebKitCSSTransformValue::Translate3DTransformOperation;
m_argCount = 5;
m_unit = CSSParser::FLength | CSSParser::FPercent;
} else if (equalIgnoringCase(name, "matrix(")) {
m_type = WebKitCSSTransformValue::MatrixTransformOperation;
m_argCount = 11;
m_unit = CSSParser::FNumber;
} else if (equalIgnoringCase(name, "matrix3d(")) {
m_type = WebKitCSSTransformValue::Matrix3DTransformOperation;
m_argCount = 31;
m_unit = CSSParser::FNumber;
} else if (equalIgnoringCase(name, "perspective(")) {
m_type = WebKitCSSTransformValue::PerspectiveTransformOperation;
m_unit = CSSParser::FNumber;
}
if (equalIgnoringCase(name, "scale(") || equalIgnoringCase(name, "skew(") || equalIgnoringCase(name, "translate(")) {
m_allowSingleArgument = true;
m_argCount = 3;
}
}
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;
// 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.
RefPtr<CSSValueList> list = CSSValueList::createSpaceSeparated();
for (CSSParserValue* value = m_valueList->current(); value; value = m_valueList->next()) {
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;
// Create the new WebKitCSSTransformValue for this operation and add it to our list.
RefPtr<WebKitCSSTransformValue> transformValue = WebKitCSSTransformValue::create(info.type());
list->append(transformValue);
// 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 == 0) {
// 1st param of translateZ() cannot be a percentage
if (!validUnit(a, FLength, CSSStrictMode))
return 0;
} else if (info.type() == WebKitCSSTransformValue::PerspectiveTransformOperation && argNumber == 0) {
// 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 list.release();
}
#if ENABLE(CSS_FILTERS)
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.
}
#if ENABLE(CSS_SHADERS)
else if (equalIgnoringCase(name, "custom("))
filterType = WebKitCSSFilterValue::CustomFilterOperation;
#endif
}
#if ENABLE(CSS_SHADERS)
static bool acceptCommaOperator(CSSParserValueList* argsList)
{
if (CSSParserValue* arg = argsList->current()) {
if (!isComma(arg))
return false;
argsList->next();
}
return true;
}
PassRefPtr<WebKitCSSFilterValue> CSSParser::parseCustomFilter(CSSParserValue* value)
{
CSSParserValueList* argsList = value->function->args.get();
if (!argsList)
return 0;
RefPtr<WebKitCSSFilterValue> filterValue = WebKitCSSFilterValue::create(WebKitCSSFilterValue::CustomFilterOperation);
// Custom filter syntax:
//
// vertexShader: <uri> | none
// fragmentShader: <uri> | none
//
// box: filter-box | border-box | padding-box | content-box
// vertexMesh: +<integer>{1,2}[wsp<box>][wsp'detached']
//
// param-value: true|false[wsp+true|false]{0-3} |
// <number>[wsp+<number>]{0-3} |
// <array> |
// <transform> |
// <texture(<uri>)>
// array: 'array('<number>[wsp<number>]*')'
// css-3d-transform: <transform-function>;[<transform-function>]*
// transform: <css-3d-transform> | <mat>
// mat: 'mat2('<number>(,<number>){3}')' |
// 'mat3('<number>(,<number>){8}')' |
// 'mat4('<number>(,<number>){15}')' )
// param-def: <param-name>wsp<param-value>
// param-name: <ident>
// params: [<param-def>[,<param-def>*]]
//
// custom(<vertex-shader>[wsp<fragment-shader>][,<vertex-mesh>][,<params>])
// 1. Parse the shader URLs: <vertex-shader>[wsp<fragment-shader>]
RefPtr<CSSValueList> shadersList = CSSValueList::createSpaceSeparated();
bool hadAtLeastOneCustomShader = false;
CSSParserValue* arg;
while ((arg = argsList->current())) {
RefPtr<CSSValue> value;
if (arg->id == CSSValueNone)
value = cssValuePool().createIdentifierValue(CSSValueNone);
else if (arg->unit == CSSPrimitiveValue::CSS_URI) {
KURL shaderURL = completeURL(arg->string);
value = WebKitCSSShaderValue::create(shaderURL.string());
hadAtLeastOneCustomShader = true;
}
if (!value)
break;
shadersList->append(value.release());
argsList->next();
}
if (!shadersList->length() || !hadAtLeastOneCustomShader || shadersList->length() > 2 || !acceptCommaOperator(argsList))
return 0;
filterValue->append(shadersList.release());
// 2. Parse the mesh size <vertex-mesh>
RefPtr<CSSValueList> meshSizeList = CSSValueList::createSpaceSeparated();
while ((arg = argsList->current())) {
if (!validUnit(arg, FInteger | FNonNeg, CSSStrictMode))
break;
int integerValue = clampToInteger(arg->fValue);
// According to the specification we can only accept positive non-zero values.
if (integerValue < 1)
return 0;
meshSizeList->append(cssValuePool().createValue(integerValue, CSSPrimitiveValue::CSS_NUMBER));
argsList->next();
}
if (meshSizeList->length() > 2)
return 0;
if ((arg = argsList->current()) && (arg->id == CSSValueBorderBox || arg->id == CSSValuePaddingBox
|| arg->id == CSSValueContentBox || arg->id == CSSValueFilterBox)) {
meshSizeList->append(cssValuePool().createIdentifierValue(arg->id));
argsList->next();
}
if ((arg = argsList->current()) && arg->id == CSSValueDetached) {
meshSizeList->append(cssValuePool().createIdentifierValue(arg->id));
argsList->next();
}
if (meshSizeList->length()) {
if (!acceptCommaOperator(argsList))
return 0;
filterValue->append(meshSizeList.release());
}
// 3. Parser the parameters.
RefPtr<CSSValueList> paramList = CSSValueList::createCommaSeparated();
while ((arg = argsList->current())) {
if (arg->id || arg->unit != CSSPrimitiveValue::CSS_IDENT)
return 0;
RefPtr<CSSValueList> parameter = CSSValueList::createSpaceSeparated();
parameter->append(createPrimitiveStringValue(arg));
argsList->next();
if (!(arg = argsList->current()))
return 0;
// TODO: Implement other parameters types parsing.
// textures: https://bugs.webkit.org/show_bug.cgi?id=71442
// 3d-transforms: https://bugs.webkit.org/show_bug.cgi?id=71443
// mat2, mat3, mat4: https://bugs.webkit.org/show_bug.cgi?id=71444
RefPtr<CSSValueList> paramValueList = CSSValueList::createSpaceSeparated();
while ((arg = argsList->current())) {
// If we hit a comma it means we finished this parameter's values.
if (isComma(arg))
break;
if (!validUnit(arg, FNumber, CSSStrictMode))
return 0;
paramValueList->append(cssValuePool().createValue(arg->fValue, CSSPrimitiveValue::CSS_NUMBER));
argsList->next();
}
if (!paramValueList->length() || paramValueList->length() > 4)
return 0;
parameter->append(paramValueList.release());
paramList->append(parameter.release());
if (!acceptCommaOperator(argsList))
return 0;
}
if (paramList->length())
filterValue->append(paramList.release());
return filterValue;
}
#endif
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, -1 to +1 or -100% to +100%, if missing use 0,
if (args->size() > 1)
return 0;
if (args->size()) {
CSSParserValue* value = args->current();
if (!validUnit(value, FNumber | FPercent, CSSStrictMode))
return 0;
double amount = value->fValue;
double minAllowed = value->unit == CSSPrimitiveValue::CSS_PERCENTAGE ? -100.0 : -1.0;
double maxAllowed = value->unit == CSSPrimitiveValue::CSS_PERCENTAGE ? 100.0 : 1.0;
if (amount < minAllowed || amount > maxAllowed)
return 0;
filterValue->append(cssValuePool().createValue(amount, 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.release())->itemWithoutBoundsCheck(0));
break;
}
default:
ASSERT_NOT_REACHED();
}
return filterValue.release();
}
PassRefPtr<CSSValueList> CSSParser::parseFilter()
{
if (!m_valueList)
return 0;
// The filter is a list of functional primitives that specify individual operations.
RefPtr<CSSValueList> list = CSSValueList::createSpaceSeparated();
for (CSSParserValue* value = m_valueList->current(); value; value = m_valueList->next()) {
if (value->unit != CSSPrimitiveValue::CSS_URI && (value->unit != CSSParserValue::Function || !value->function))
return 0;
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);
list->append(referenceFilterValue);
referenceFilterValue->append(cssValuePool().createValue(value->string, CSSPrimitiveValue::CSS_STRING));
} else {
const CSSParserString name = value->function->name;
unsigned maximumArgumentCount = 1;
filterInfoForName(name, filterType, maximumArgumentCount);
if (filterType == WebKitCSSFilterValue::UnknownFilterOperation)
return 0;
#if ENABLE(CSS_SHADERS)
if (filterType == WebKitCSSFilterValue::CustomFilterOperation) {
// Make sure parsing fails if custom filters are disabled.
if (!m_context.isCSSCustomFilterEnabled)
return 0;
RefPtr<WebKitCSSFilterValue> filterValue = parseCustomFilter(value);
if (!filterValue)
return 0;
list->append(filterValue.release());
continue;
}
#endif
CSSParserValueList* args = value->function->args.get();
if (!args)
return 0;
RefPtr<WebKitCSSFilterValue> filterValue = parseBuiltinFilterArguments(args, filterType);
if (!filterValue)
return 0;
list->append(filterValue);
}
}
return list.release();
}
#endif
#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::cssGridLayoutEnabled() const
{
return m_context.isCSSGridLayoutEnabled;
}
#if ENABLE(CSS_REGIONS)
bool CSSParser::parseFlowThread(const String& flowName)
{
setupParser("@-webkit-decls{-webkit-flow-into:", flowName, "}");
cssyyparse(this);
m_rule = 0;
return ((m_parsedProperties.size() == 1) && (m_parsedProperties.first().id() == CSSPropertyWebkitFlowInto));
}
// 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:
parseFillPosition(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;
}
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.release());
parsedValues->append(shape.release());
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::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
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 int 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 (int 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.characters[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(FontFeatureValue::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,
CharacterEndMediaQuery,
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 - ; */ CharacterEndMediaQuery,
/* 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 - { */ CharacterEndMediaQuery,
/* 124 - | */ CharacterVerticalBar,
/* 125 - } */ CharacterOther,
/* 126 - ~ */ CharacterTilde,
/* 127 - Delete */ CharacterOther,
};
// Utility functions for the CSS tokenizer.
static inline bool isCSSLetter(UChar character)
{
return character >= 128 || typesOfASCIICharacters[character] <= CharacterDash;
}
static inline bool isCSSEscape(UChar character)
{
return character >= ' ' && character != 127;
}
static inline bool isURILetter(UChar character)
{
return (character >= '*' && character != 127) || (character >= '#' && character <= '&') || character == '!';
}
static inline bool isIdentifierStartAfterDash(UChar* currentCharacter)
{
return isASCIIAlpha(currentCharacter[0]) || currentCharacter[0] == '_' || currentCharacter[0] >= 128
|| (currentCharacter[0] == '\\' && isCSSEscape(currentCharacter[1]));
}
static inline bool isEqualToCSSIdentifier(UChar* cssString, const char* constantString)
{
// Compare an UChar 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;
}
static UChar* checkAndSkipEscape(UChar* 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;
}
static inline UChar* skipWhiteSpace(UChar* currentCharacter)
{
while (isHTMLSpace(*currentCharacter))
++currentCharacter;
return currentCharacter;
}
// Main CSS tokenizer functions.
inline bool CSSParser::isIdentifierStart()
{
// Check whether an identifier is started.
return isIdentifierStartAfterDash((*m_currentCharacter != '-') ? m_currentCharacter : m_currentCharacter + 1);
}
inline UChar* CSSParser::checkAndSkipString(UChar* currentCharacter, UChar 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;
}
}
}
void CSSParser::parseEscape(UChar*& result)
{
ASSERT(*m_currentCharacter == '\\' && isCSSEscape(m_currentCharacter[1]));
++m_currentCharacter;
if (isASCIIHexDigit(*m_currentCharacter)) {
unsigned unicode = 0;
int length = 6;
do {
unicode = (unicode << 4) + toASCIIHexValue(*m_currentCharacter++);
} while (--length && isASCIIHexDigit(*m_currentCharacter));
// Characters above 0x10ffff are not handled.
if (unicode > 0x10ffff)
unicode = 0xfffd;
// Optional space after the escape sequence.
if (isHTMLSpace(*m_currentCharacter))
++m_currentCharacter;
// 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;
} else
*result = *m_currentCharacter++;
++result;
}
inline void CSSParser::parseIdentifier(UChar*& result, bool& hasEscape)
{
// If a valid identifier start is found, we can safely
// parse the identifier until the next invalid character.
ASSERT(isIdentifierStart());
hasEscape = false;
do {
if (LIKELY(*m_currentCharacter != '\\'))
*result++ = *m_currentCharacter++;
else {
hasEscape = true;
parseEscape(result);
}
} while (isCSSLetter(m_currentCharacter[0]) || (m_currentCharacter[0] == '\\' && isCSSEscape(m_currentCharacter[1])));
}
inline void CSSParser::parseString(UChar*& result, UChar quote)
{
while (true) {
if (UNLIKELY(*m_currentCharacter == quote)) {
// String parsing is done.
++m_currentCharacter;
return;
}
if (UNLIKELY(!*m_currentCharacter)) {
// String parsing is done, but don't advance pointer if at the end of input.
return;
}
ASSERT(*m_currentCharacter > '\r' || (*m_currentCharacter < '\n' && *m_currentCharacter) || *m_currentCharacter == '\v');
if (LIKELY(m_currentCharacter[0] != '\\'))
*result++ = *m_currentCharacter++;
else if (m_currentCharacter[1] == '\n' || m_currentCharacter[1] == '\f')
m_currentCharacter += 2;
else if (m_currentCharacter[1] == '\r')
m_currentCharacter += m_currentCharacter[2] == '\n' ? 3 : 2;
else
parseEscape(result);
}
}
inline void CSSParser::parseURI(UChar*& start, UChar*& result)
{
UChar* uriStart = skipWhiteSpace(m_currentCharacter);
if (*uriStart == '"' || *uriStart == '\'') {
UChar quote = *uriStart;
++uriStart;
UChar* stringEnd = checkAndSkipString(uriStart, quote);
if (!stringEnd)
return;
stringEnd = skipWhiteSpace(stringEnd);
if (*stringEnd != ')')
return;
start = result = m_currentCharacter = uriStart;
parseString(result, quote);
m_currentCharacter = stringEnd + 1;
m_token = URI;
} else {
UChar* stringEnd = uriStart;
while (isURILetter(*stringEnd)) {
if (*stringEnd != '\\')
++stringEnd;
else {
stringEnd = checkAndSkipEscape(stringEnd);
if (!stringEnd)
return;
}
}
stringEnd = skipWhiteSpace(stringEnd);
if (*stringEnd != ')')
return;
start = result = m_currentCharacter = uriStart;
while (isURILetter(*m_currentCharacter)) {
if (LIKELY(*m_currentCharacter != '\\'))
*result++ = *m_currentCharacter++;
else
parseEscape(result);
}
m_currentCharacter = stringEnd + 1;
m_token = URI;
}
}
inline bool CSSParser::parseUnicodeRange()
{
UChar* currentCharacter = m_currentCharacter + 1;
int length = 6;
ASSERT(*m_currentCharacter == '+');
while (isASCIIHexDigit(*currentCharacter) && length) {
++currentCharacter;
--length;
}
if (length && *currentCharacter == '?') {
// At most 5 hex digit followed by a question mark.
do {
++currentCharacter;
--length;
} while (*currentCharacter == '?' && length);
m_currentCharacter = currentCharacter;
return true;
}
if (length < 6) {
// At least one hex digit.
if (currentCharacter[0] == '-' && isASCIIHexDigit(currentCharacter[1])) {
// Followed by a dash and a hex digit.
++currentCharacter;
length = 6;
do {
++currentCharacter;
} while (--length && isASCIIHexDigit(*currentCharacter));
}
m_currentCharacter = currentCharacter;
return true;
}
return false;
}
bool CSSParser::parseNthChild()
{
UChar* currentCharacter = m_currentCharacter;
while (isASCIIDigit(*currentCharacter))
++currentCharacter;
if (isASCIIAlphaCaselessEqual(*currentCharacter, 'n')) {
m_currentCharacter = currentCharacter + 1;
return true;
}
return false;
}
bool CSSParser::parseNthChildExtra()
{
UChar* currentCharacter = skipWhiteSpace(m_currentCharacter);
if (*currentCharacter != '+' && *currentCharacter != '-')
return false;
currentCharacter = skipWhiteSpace(currentCharacter + 1);
if (!isASCIIDigit(*currentCharacter))
return false;
do {
++currentCharacter;
} while (isASCIIDigit(*currentCharacter));
m_currentCharacter = currentCharacter;
return true;
}
inline void CSSParser::detectFunctionTypeToken(int length)
{
ASSERT(length > 0);
UChar* name = m_tokenStart;
switch (length) {
case 3:
if (isASCIIAlphaCaselessEqual(name[0], 'n') && isASCIIAlphaCaselessEqual(name[1], 'o') && isASCIIAlphaCaselessEqual(name[2], 't'))
m_token = NOTFUNCTION;
else if (isASCIIAlphaCaselessEqual(name[0], 'u') && isASCIIAlphaCaselessEqual(name[1], 'r') && isASCIIAlphaCaselessEqual(name[2], 'l'))
m_token = URI;
return;
case 9:
if (isEqualToCSSIdentifier(name, "nth-child"))
m_parsingMode = NthChildMode;
return;
case 11:
if (isEqualToCSSIdentifier(name, "nth-of-type"))
m_parsingMode = NthChildMode;
return;
case 14:
if (isEqualToCSSIdentifier(name, "nth-last-child"))
m_parsingMode = NthChildMode;
return;
case 16:
if (isEqualToCSSIdentifier(name, "nth-last-of-type"))
m_parsingMode = NthChildMode;
return;
}
}
inline void CSSParser::detectMediaQueryToken(int length)
{
ASSERT(m_parsingMode == MediaQueryMode);
UChar* name = m_tokenStart;
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;
}
}
inline void CSSParser::detectNumberToken(UChar* type, int length)
{
ASSERT(length > 0);
switch (toASCIILowerUnchecked(type[0])) {
case 'c':
if (length == 2 && isASCIIAlphaCaselessEqual(type[1], 'm'))
m_token = CMS;
return;
case 'd':
if (length == 3 && isASCIIAlphaCaselessEqual(type[1], 'e') && isASCIIAlphaCaselessEqual(type[2], 'g'))
m_token = DEGS;
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 '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')
&& isASCIIAlphaCaselessEqual(type[2], 'i') && isASCIIAlphaCaselessEqual(type[3], 'n'))
m_token = VMIN;
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;
}
}
inline void CSSParser::detectDashToken(int length)
{
UChar* name = m_tokenStart;
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;
}
inline void CSSParser::detectAtToken(int length, bool hasEscape)
{
UChar* name = m_tokenStart;
ASSERT(name[0] == '@' && length >= 2);
// charset, font-face, import, media, namespace, page,
// -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;
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 ENABLE(CSS_REGIONS)
if (!hasEscape && isEqualToCSSIdentifier(name + 2, "webkit-region"))
m_token = WEBKIT_REGION_RULE_SYM;
#endif
return;
case 17:
if (!hasEscape && isEqualToCSSIdentifier(name + 2, "webkit-selector"))
m_token = WEBKIT_SELECTOR_SYM;
return;
case 18:
if (isEqualToCSSIdentifier(name + 2, "webkit-keyframes"))
m_token = WEBKIT_KEYFRAMES_SYM;
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;
}
}
}
int CSSParser::lex(void* yylvalWithoutType)
{
YYSTYPE* yylval = static_cast<YYSTYPE*>(yylvalWithoutType);
// Write pointer for the next character.
UChar* result;
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.characters = 0;
yylval->string.length = 0;
#endif
restartAfterComment:
m_tokenStart = result = m_currentCharacter;
m_token = *m_currentCharacter;
++m_currentCharacter;
switch ((m_token <= 127) ? typesOfASCIICharacters[m_token] : CharacterIdentifierStart) {
case CharacterCaselessU:
if (UNLIKELY(*m_currentCharacter == '+'))
if (parseUnicodeRange()) {
m_token = UNICODERANGE;
yylval->string.characters = m_tokenStart;
yylval->string.length = m_currentCharacter - m_tokenStart;
break;
}
// Fall through to CharacterIdentifierStart.
case CharacterIdentifierStart:
--m_currentCharacter;
parseIdentifier(result, hasEscape);
m_token = IDENT;
yylval->string.characters = m_tokenStart;
yylval->string.length = result - m_tokenStart;
if (UNLIKELY(*m_currentCharacter == '(')) {
m_token = FUNCTION;
if (!hasEscape)
detectFunctionTypeToken(result - m_tokenStart);
++m_currentCharacter;
++result;
++yylval->string.length;
if (token() == URI) {
m_token = FUNCTION;
// Check whether it is really an URI.
parseURI(yylval->string.characters, result);
yylval->string.length = result - yylval->string.characters;
}
} else if (UNLIKELY(m_parsingMode != NormalMode) && !hasEscape) {
if (m_parsingMode == MediaQueryMode)
detectMediaQueryToken(result - m_tokenStart);
else if (m_parsingMode == NthChildMode && isASCIIAlphaCaselessEqual(m_tokenStart[0], 'n')) {
if (result - m_tokenStart == 1) {
// String "n" is IDENT but "n+1" is NTH.
if (parseNthChildExtra()) {
m_token = NTH;
yylval->string.length = m_currentCharacter - m_tokenStart;
}
} else if (result - m_tokenStart >= 2 && m_tokenStart[1] == '-') {
// String "n-" is IDENT but "n-1" is NTH.
// Set m_currentCharacter to '-' to continue parsing.
UChar* nextCharacter = result;
m_currentCharacter = m_tokenStart + 1;
if (parseNthChildExtra()) {
m_token = NTH;
yylval->string.length = m_currentCharacter - m_tokenStart;
} else {
// Revert the change to m_currentCharacter if unsuccessful.
m_currentCharacter = nextCharacter;
}
}
}
}
break;
case CharacterDot:
if (!isASCIIDigit(m_currentCharacter[0]))
break;
// Fall through to CharacterNumber.
case CharacterNumber: {
bool dotSeen = (m_token == '.');
while (true) {
if (!isASCIIDigit(m_currentCharacter[0])) {
// Only one dot is allowed for a number,
// and it must be followed by a digit.
if (m_currentCharacter[0] != '.' || dotSeen || !isASCIIDigit(m_currentCharacter[1]))
break;
dotSeen = true;
}
++m_currentCharacter;
}
if (UNLIKELY(m_parsingMode == NthChildMode) && !dotSeen && isASCIIAlphaCaselessEqual(*m_currentCharacter, 'n')) {
// "[0-9]+n" is always an NthChild.
++m_currentCharacter;
parseNthChildExtra();
m_token = NTH;
yylval->string.characters = m_tokenStart;
yylval->string.length = m_currentCharacter - m_tokenStart;
break;
}
yylval->number = charactersToDouble(m_tokenStart, m_currentCharacter - m_tokenStart);
// Type of the function.
if (isIdentifierStart()) {
UChar* type = m_currentCharacter;
result = m_currentCharacter;
parseIdentifier(result, hasEscape);
if (*m_currentCharacter == '+') {
// Any identifier followed by a '+' sign is an invalid dimension.
++m_currentCharacter;
m_token = INVALIDDIMEN;
} else {
m_token = DIMEN;
if (!hasEscape)
detectNumberToken(type, m_currentCharacter - type);
if (m_token == DIMEN) {
// The decoded number is overwritten, but this is intentional.
yylval->string.characters = m_tokenStart;
yylval->string.length = m_currentCharacter - m_tokenStart;
}
}
} else if (*m_currentCharacter == '%') {
// Although the CSS grammar says {num}% we follow
// webkit at the moment which uses {num}%+.
do {
++m_currentCharacter;
} while (*m_currentCharacter == '%');
m_token = PERCENTAGE;
} else
m_token = dotSeen ? FLOATTOKEN : INTEGER;
break;
}
case CharacterDash:
if (isIdentifierStartAfterDash(m_currentCharacter)) {
--m_currentCharacter;
parseIdentifier(result, hasEscape);
m_token = IDENT;
if (*m_currentCharacter == '(') {
m_token = FUNCTION;
if (!hasEscape)
detectDashToken(result - m_tokenStart);
++m_currentCharacter;
++result;
} else if (UNLIKELY(m_parsingMode == NthChildMode) && !hasEscape && isASCIIAlphaCaselessEqual(m_tokenStart[1], 'n')) {
if (result - m_tokenStart == 2) {
// String "-n" is IDENT but "-n+1" is NTH.
if (parseNthChildExtra()) {
m_token = NTH;
result = m_currentCharacter;
}
} else if (result - m_tokenStart >= 3 && m_tokenStart[2] == '-') {
// String "-n-" is IDENT but "-n-1" is NTH.
// Set m_currentCharacter to second '-' of '-n-' to continue parsing.
UChar* nextCharacter = result;
m_currentCharacter = m_tokenStart + 2;
if (parseNthChildExtra()) {
m_token = NTH;
result = m_currentCharacter;
} else {
// Revert the change to m_currentCharacter if unsuccessful.
m_currentCharacter = nextCharacter;
}
}
}
yylval->string.characters = m_tokenStart;
yylval->string.length = result - m_tokenStart;
} else if (m_currentCharacter[0] == '-' && m_currentCharacter[1] == '>') {
m_currentCharacter += 2;
m_token = SGML_CD;
} else if (UNLIKELY(m_parsingMode == NthChildMode)) {
// "-[0-9]+n" is always an NthChild.
if (parseNthChild()) {
parseNthChildExtra();
m_token = NTH;
yylval->string.characters = m_tokenStart;
yylval->string.length = m_currentCharacter - m_tokenStart;
}
}
break;
case CharacterOther:
// m_token is simply the current character.
break;
case CharacterNull:
// Do not advance pointer at the end of input.
--m_currentCharacter;
break;
case CharacterWhiteSpace:
m_token = WHITESPACE;
// Might start with a '\n'.
--m_currentCharacter;
do {
if (*m_currentCharacter == '\n')
++m_lineNumber;
++m_currentCharacter;
} while (*m_currentCharacter <= ' ' && (typesOfASCIICharacters[*m_currentCharacter] == CharacterWhiteSpace));
break;
case CharacterEndMediaQuery:
if (m_parsingMode == MediaQueryMode)
m_parsingMode = NormalMode;
break;
case CharacterEndNthChild:
if (m_parsingMode == NthChildMode)
m_parsingMode = NormalMode;
break;
case CharacterQuote:
if (checkAndSkipString(m_currentCharacter, m_token)) {
++result;
parseString(result, m_token);
m_token = STRING;
yylval->string.characters = m_tokenStart + 1;
yylval->string.length = result - (m_tokenStart + 1);
}
break;
case CharacterExclamationMark: {
UChar* start = skipWhiteSpace(m_currentCharacter);
if (isEqualToCSSIdentifier(start, "important")) {
m_token = IMPORTANT_SYM;
m_currentCharacter = start + 9;
}
break;
}
case CharacterHashmark: {
UChar* start = m_currentCharacter;
result = m_currentCharacter;
if (isASCIIDigit(*m_currentCharacter)) {
// This must be a valid hex number token.
do {
++m_currentCharacter;
} while (isASCIIHexDigit(*m_currentCharacter));
m_token = HEX;
yylval->string.characters = start;
yylval->string.length = m_currentCharacter - start;
} else if (isIdentifierStart()) {
m_token = IDSEL;
parseIdentifier(result, hasEscape);
if (!hasEscape) {
// Check whether the identifier is also a valid hex number.
UChar* current = start;
m_token = HEX;
do {
if (!isASCIIHexDigit(*current)) {
m_token = IDSEL;
break;
}
++current;
} while (current < result);
}
yylval->string.characters = start;
yylval->string.length = result - start;
}
break;
}
case CharacterSlash:
// Ignore comments. They are not even considered as white spaces.
if (*m_currentCharacter == '*') {
++m_currentCharacter;
while (m_currentCharacter[0] != '*' || m_currentCharacter[1] != '/') {
if (*m_currentCharacter == '\n')
++m_lineNumber;
if (*m_currentCharacter == '\0') {
// Unterminated comments are simply ignored.
m_currentCharacter -= 2;
break;
}
++m_currentCharacter;
}
m_currentCharacter += 2;
goto restartAfterComment;
}
break;
case CharacterDollar:
if (*m_currentCharacter == '=') {
++m_currentCharacter;
m_token = ENDSWITH;
}
break;
case CharacterAsterisk:
if (*m_currentCharacter == '=') {
++m_currentCharacter;
m_token = CONTAINS;
}
break;
case CharacterPlus:
if (UNLIKELY(m_parsingMode == NthChildMode)) {
// Simplest case. "+[0-9]*n" is always NthChild.
if (parseNthChild()) {
parseNthChildExtra();
m_token = NTH;
yylval->string.characters = m_tokenStart;
yylval->string.length = m_currentCharacter - m_tokenStart;
}
}
break;
case CharacterLess:
if (m_currentCharacter[0] == '!' && m_currentCharacter[1] == '-' && m_currentCharacter[2] == '-') {
m_currentCharacter += 3;
m_token = SGML_CD;
}
break;
case CharacterAt:
if (isIdentifierStart()) {
m_token = ATKEYWORD;
++result;
parseIdentifier(result, hasEscape);
detectAtToken(result - m_tokenStart, hasEscape);
}
break;
case CharacterBackSlash:
if (isCSSEscape(*m_currentCharacter)) {
--m_currentCharacter;
parseIdentifier(result, hasEscape);
m_token = IDENT;
yylval->string.characters = m_tokenStart;
yylval->string.length = result - m_tokenStart;
}
break;
case CharacterXor:
if (*m_currentCharacter == '=') {
++m_currentCharacter;
m_token = BEGINSWITH;
}
break;
case CharacterVerticalBar:
if (*m_currentCharacter == '=') {
++m_currentCharacter;
m_token = DASHMATCH;
}
break;
case CharacterTilde:
if (*m_currentCharacter == '=') {
++m_currentCharacter;
m_token = INCLUDES;
}
break;
default:
ASSERT_NOT_REACHED();
break;
}
#ifndef NDEBUG
switch (token()) {
case STRING:
ASSERT(yylval->string.characters == m_tokenStart + 1);
break;
case IDENT:
case NTH:
case DIMEN:
case UNICODERANGE:
case FUNCTION:
case ANYFUNCTION:
case NOTFUNCTION:
case CALCFUNCTION:
case MINFUNCTION:
case MAXFUNCTION:
ASSERT(yylval->string.characters == m_tokenStart && yylval->string.length > 0);
break;
case URI:
ASSERT(yylval->string.characters && yylval->string.characters != m_tokenStart);
break;
case HEX:
case IDSEL:
ASSERT(yylval->string.characters == m_tokenStart + 1 && yylval->string.length > 0);
break;
}
#endif
return token();
}
CSSParserSelector* CSSParser::createFloatingSelector()
{
CSSParserSelector* selector = new CSSParserSelector;
m_floatingSelectors.add(selector);
return selector;
}
PassOwnPtr<CSSParserSelector> CSSParser::sinkFloatingSelector(CSSParserSelector* selector)
{
if (selector) {
ASSERT(m_floatingSelectors.contains(selector));
m_floatingSelectors.remove(selector);
}
return adoptPtr(selector);
}
Vector<OwnPtr<CSSParserSelector> >* CSSParser::createFloatingSelectorVector()
{
Vector<OwnPtr<CSSParserSelector> >* selectorVector = new Vector<OwnPtr<CSSParserSelector> >;
m_floatingSelectorVectors.add(selectorVector);
return selectorVector;
}
PassOwnPtr<Vector<OwnPtr<CSSParserSelector> > > CSSParser::sinkFloatingSelectorVector(Vector<OwnPtr<CSSParserSelector> >* selectorVector)
{
if (selectorVector) {
ASSERT(m_floatingSelectorVectors.contains(selectorVector));
m_floatingSelectorVectors.remove(selectorVector);
}
return adoptPtr(selectorVector);
}
CSSParserValueList* CSSParser::createFloatingValueList()
{
CSSParserValueList* list = new CSSParserValueList;
m_floatingValueLists.add(list);
return list;
}
PassOwnPtr<CSSParserValueList> CSSParser::sinkFloatingValueList(CSSParserValueList* list)
{
if (list) {
ASSERT(m_floatingValueLists.contains(list));
m_floatingValueLists.remove(list);
}
return adoptPtr(list);
}
CSSParserFunction* CSSParser::createFloatingFunction()
{
CSSParserFunction* function = new CSSParserFunction;
m_floatingFunctions.add(function);
return function;
}
PassOwnPtr<CSSParserFunction> CSSParser::sinkFloatingFunction(CSSParserFunction* function)
{
if (function) {
ASSERT(m_floatingFunctions.contains(function));
m_floatingFunctions.remove(function);
}
return adoptPtr(function);
}
CSSParserValue& CSSParser::sinkFloatingValue(CSSParserValue& value)
{
if (value.unit == CSSParserValue::Function) {
ASSERT(m_floatingFunctions.contains(value.function));
m_floatingFunctions.remove(value.function);
}
return value;
}
MediaQueryExp* CSSParser::createFloatingMediaQueryExp(const AtomicString& mediaFeature, CSSParserValueList* values)
{
m_floatingMediaQueryExp = MediaQueryExp::create(mediaFeature, values);
return m_floatingMediaQueryExp.get();
}
PassOwnPtr<MediaQueryExp> CSSParser::sinkFloatingMediaQueryExp(MediaQueryExp* expression)
{
ASSERT_UNUSED(expression, expression == m_floatingMediaQueryExp);
return m_floatingMediaQueryExp.release();
}
Vector<OwnPtr<MediaQueryExp> >* CSSParser::createFloatingMediaQueryExpList()
{
m_floatingMediaQueryExpList = adoptPtr(new Vector<OwnPtr<MediaQueryExp> >);
return m_floatingMediaQueryExpList.get();
}
PassOwnPtr<Vector<OwnPtr<MediaQueryExp> > > CSSParser::sinkFloatingMediaQueryExpList(Vector<OwnPtr<MediaQueryExp> >* list)
{
ASSERT_UNUSED(list, list == m_floatingMediaQueryExpList);
return m_floatingMediaQueryExpList.release();
}
MediaQuery* CSSParser::createFloatingMediaQuery(MediaQuery::Restrictor restrictor, const String& mediaType, PassOwnPtr<Vector<OwnPtr<MediaQueryExp> > > expressions)
{
m_floatingMediaQuery = adoptPtr(new MediaQuery(restrictor, mediaType, expressions));
return m_floatingMediaQuery.get();
}
MediaQuery* CSSParser::createFloatingMediaQuery(PassOwnPtr<Vector<OwnPtr<MediaQueryExp> > > expressions)
{
return createFloatingMediaQuery(MediaQuery::None, "all", expressions);
}
PassOwnPtr<MediaQuery> CSSParser::sinkFloatingMediaQuery(MediaQuery* query)
{
ASSERT_UNUSED(query, query == m_floatingMediaQuery);
return m_floatingMediaQuery.release();
}
MediaQuerySet* CSSParser::createMediaQuerySet()
{
RefPtr<MediaQuerySet> queries = MediaQuerySet::create();
MediaQuerySet* result = queries.get();
m_parsedMediaQuerySets.append(queries.release());
return result;
}
StyleRuleBase* CSSParser::createImportRule(const CSSParserString& url, MediaQuerySet* media)
{
if (!media || !m_allowImportRules)
return 0;
RefPtr<StyleRuleImport> rule = StyleRuleImport::create(url, media);
StyleRuleImport* result = rule.get();
m_parsedRules.append(rule.release());
return result;
}
StyleRuleBase* CSSParser::createMediaRule(MediaQuerySet* media, RuleList* rules)
{
if (!media || !rules)
return 0;
m_allowImportRules = m_allowNamespaceDeclarations = false;
RefPtr<StyleRuleMedia> rule = StyleRuleMedia::create(media, *rules);
StyleRuleMedia* result = rule.get();
m_parsedRules.append(rule.release());
return result;
}
CSSParser::RuleList* CSSParser::createRuleList()
{
OwnPtr<RuleList> list = adoptPtr(new RuleList);
RuleList* listPtr = list.get();
m_parsedRuleLists.append(list.release());
return listPtr;
}
StyleRuleKeyframes* CSSParser::createKeyframesRule()
{
m_allowImportRules = m_allowNamespaceDeclarations = false;
RefPtr<StyleRuleKeyframes> rule = StyleRuleKeyframes::create();
StyleRuleKeyframes* rulePtr = rule.get();
m_parsedRules.append(rule.release());
return rulePtr;
}
StyleRuleBase* CSSParser::createStyleRule(Vector<OwnPtr<CSSParserSelector> >* selectors)
{
StyleRule* result = 0;
markRuleBodyEnd();
if (selectors) {
m_allowImportRules = m_allowNamespaceDeclarations = false;
RefPtr<StyleRule> rule = StyleRule::create(m_lastSelectorLineNumber);
rule->parserAdoptSelectorVector(*selectors);
if (m_hasFontFaceOnlyValues)
deleteFontFaceOnlyValues();
rule->setProperties(createStylePropertySet());
result = rule.get();
m_parsedRules.append(rule.release());
if (m_ruleRangeMap) {
ASSERT(m_currentRuleData);
m_currentRuleData->styleSourceData->styleBodyRange = m_ruleBodyRange;
m_currentRuleData->selectorListRange = m_selectorListRange;
m_ruleRangeMap->set(result, m_currentRuleData.release());
m_currentRuleData = CSSRuleSourceData::create();
m_currentRuleData->styleSourceData = CSSStyleSourceData::create();
m_inStyleRuleOrDeclaration = false;
}
}
resetSelectorListMarks();
resetRuleBodyMarks();
clearProperties();
return result;
}
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 && (!property.value()->isValueList() || static_cast<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();
return 0;
}
}
RefPtr<StyleRuleFontFace> rule = StyleRuleFontFace::create();
rule->setProperties(createStylePropertySet());
clearProperties();
StyleRuleFontFace* result = rule.get();
m_parsedRules.append(rule.release());
return result;
}
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::updateSpecifiersWithElementName(const AtomicString& namespacePrefix, const AtomicString& elementName, CSSParserSelector* specifiers)
{
AtomicString determinedNamespace = namespacePrefix != nullAtom && m_styleSheet ? m_styleSheet->determineNamespace(namespacePrefix) : m_defaultNamespace;
QualifiedName tag = QualifiedName(namespacePrefix, elementName, determinedNamespace);
if (!specifiers->isUnknownPseudoElement()) {
specifiers->setTag(tag);
return;
}
CSSParserSelector* lastShadowDescendant = specifiers;
CSSParserSelector* history = specifiers;
while (history->tagHistory()) {
history = history->tagHistory();
if (history->hasShadowDescendant())
lastShadowDescendant = history;
}
if (lastShadowDescendant->tagHistory()) {
lastShadowDescendant->tagHistory()->setTag(tag);
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. '*').
OwnPtr<CSSParserSelector> elementNameSelector = adoptPtr(new CSSParserSelector);
elementNameSelector->setTag(tag);
lastShadowDescendant->setTagHistory(elementNameSelector.release());
lastShadowDescendant->setRelation(CSSSelector::ShadowDescendant);
}
CSSParserSelector* CSSParser::updateSpecifiers(CSSParserSelector* specifiers, CSSParserSelector* newSpecifier)
{
if (newSpecifier->isUnknownPseudoElement()) {
// Unknown pseudo element always goes at the top of selector chain.
newSpecifier->appendTagHistory(CSSSelector::ShadowDescendant, sinkFloatingSelector(specifiers));
return newSpecifier;
}
if (specifiers->isUnknownPseudoElement()) {
// Specifiers for unknown pseudo element go right behind it in the chain.
specifiers->insertTagHistory(CSSSelector::SubSelector, sinkFloatingSelector(newSpecifier), CSSSelector::ShadowDescendant);
return specifiers;
}
specifiers->appendTagHistory(CSSSelector::SubSelector, sinkFloatingSelector(newSpecifier));
return specifiers;
}
StyleRuleBase* CSSParser::createPageRule(PassOwnPtr<CSSParserSelector> pageSelector)
{
// FIXME: Margin at-rules are ignored.
m_allowImportRules = m_allowNamespaceDeclarations = false;
StyleRulePage* pageRule = 0;
if (pageSelector) {
RefPtr<StyleRulePage> rule = StyleRulePage::create();
Vector<OwnPtr<CSSParserSelector> > selectorVector;
selectorVector.append(pageSelector);
rule->parserAdoptSelectorVector(selectorVector);
rule->setProperties(createStylePropertySet());
pageRule = rule.get();
m_parsedRules.append(rule.release());
}
clearProperties();
return pageRule;
}
void CSSParser::setReusableRegionSelectorVector(Vector<OwnPtr<CSSParserSelector> >* selectors)
{
if (selectors)
m_reusableRegionSelectorVector.swap(*selectors);
}
StyleRuleBase* CSSParser::createRegionRule(Vector<OwnPtr<CSSParserSelector> >* regionSelector, RuleList* rules)
{
if (!cssRegionsEnabled() || !regionSelector || !rules)
return 0;
m_allowImportRules = m_allowNamespaceDeclarations = false;
RefPtr<StyleRuleRegion> regionRule = StyleRuleRegion::create(regionSelector, *rules);
StyleRuleRegion* result = regionRule.get();
m_parsedRules.append(regionRule.release());
return result;
}
StyleRuleBase* 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();
return 0; // until this method is implemented.
}
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;
}
}
StyleKeyframe* CSSParser::createKeyframe(CSSParserValueList* keys)
{
// Create a key string from the passed keys
String keyString;
for (unsigned i = 0; i < keys->size(); ++i) {
float key = static_cast<float>(keys->valueAt(i)->fValue);
if (i != 0)
keyString += ",";
keyString += String::number(key);
keyString += "%";
}
RefPtr<StyleKeyframe> keyframe = StyleKeyframe::create();
keyframe->setKeyText(keyString);
keyframe->setProperties(createStylePropertySet());
clearProperties();
StyleKeyframe* keyframePtr = keyframe.get();
m_parsedKeyframes.append(keyframe.release());
return keyframePtr;
}
void CSSParser::invalidBlockHit()
{
if (m_styleSheet && !m_hadSyntacticallyValidCSSRule)
m_styleSheet->setHasSyntacticallyValidCSSHeader(false);
}
void CSSParser::updateLastSelectorLineAndPosition()
{
m_lastSelectorLineNumber = m_lineNumber;
markRuleBodyStart();
}
void CSSParser::updateLastMediaLine(MediaQuerySet* media)
{
media->setLastLine(m_lineNumber);
}
void CSSParser::markSelectorListStart()
{
m_selectorListRange.start = m_tokenStart - m_dataStart.get();
}
void CSSParser::markSelectorListEnd()
{
if (!m_currentRuleData)
return;
UChar* listEnd = m_tokenStart;
while (listEnd > m_dataStart.get() + 1) {
if (isHTMLSpace(*(listEnd - 1)))
--listEnd;
else
break;
}
m_selectorListRange.end = listEnd - m_dataStart.get();
}
void CSSParser::markRuleBodyStart()
{
unsigned offset = m_tokenStart - m_dataStart.get();
if (*m_tokenStart == '{')
++offset; // Skip the rule body opening brace.
if (offset > m_ruleBodyRange.start)
m_ruleBodyRange.start = offset;
m_inStyleRuleOrDeclaration = true;
}
void CSSParser::markRuleBodyEnd()
{
unsigned offset = m_tokenStart - m_dataStart.get();
if (offset > m_ruleBodyRange.end)
m_ruleBodyRange.end = offset;
}
void CSSParser::markPropertyStart()
{
if (!m_inStyleRuleOrDeclaration)
return;
m_propertyRange.start = m_tokenStart - m_dataStart.get();
}
void CSSParser::markPropertyEnd(bool isImportantFound, bool isPropertyParsed)
{
if (!m_inStyleRuleOrDeclaration)
return;
unsigned offset = m_tokenStart - m_dataStart.get();
if (*m_tokenStart == ';') // Include semicolon into the property text.
++offset;
m_propertyRange.end = offset;
if (m_propertyRange.start != UINT_MAX && m_currentRuleData) {
// 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(start < end);
String propertyString = String(m_dataStart.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.
m_currentRuleData->styleSourceData->propertyData.append(
CSSPropertySourceData(name, value, isImportantFound, isPropertyParsed, SourceRange(start - m_ruleBodyRange.start, end - m_ruleBodyRange.start)));
}
resetPropertyMarks();
}
static CSSPropertyID cssPropertyID(const UChar* propertyName, unsigned length)
{
if (!length)
return CSSPropertyInvalid;
if (length > maxCSSPropertyNameLength)
return CSSPropertyInvalid;
char buffer[maxCSSPropertyNameLength + 1 + 1]; // 1 to turn "apple"/"khtml" into "webkit", 1 for null character
for (unsigned i = 0; i != length; ++i) {
UChar 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 (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)
{
return cssPropertyID(string.characters(), string.length());
}
CSSPropertyID cssPropertyID(const CSSParserString& string)
{
return cssPropertyID(string.characters, string.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
int cssValueKeywordID(const CSSParserString& string)
{
unsigned length = string.length;
if (!length)
return 0;
if (length > maxCSSValueKeywordLength)
return 0;
char buffer[maxCSSValueKeywordLength + 1 + 1]; // 1 to turn "apple"/"khtml" into "webkit", 1 for null character
for (unsigned i = 0; i != length; ++i) {
UChar c = string.characters[i];
if (c == 0 || c >= 0x7F)
return 0; // illegal character
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.
if (hasPrefix(buffer, length, "-apple-") || 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 ? hashTableEntry->id : 0;
}
// "ident" from the CSS tokenizer, minus backslash-escape sequences
static bool isCSSTokenizerIdentifier(const String& string)
{
const UChar* p = string.characters();
const UChar* end = p + string.length();
// -?
if (p != end && p[0] == '-')
++p;
// {nmstart}
if (p == end || !(p[0] == '_' || p[0] >= 128 || isASCIIAlpha(p[0])))
return false;
++p;
// {nmchar}*
for (; p != end; ++p) {
if (!(p[0] == '_' || p[0] == '-' || p[0] >= 128 || isASCIIAlphanumeric(p[0])))
return false;
}
return true;
}
// "url" from the CSS tokenizer, minus backslash-escape sequences
static bool isCSSTokenizerURL(const String& string)
{
const UChar* p = string.characters();
const UChar* end = p + string.length();
for (; p != end; ++p) {
UChar c = p[0];
switch (c) {
case '!':
case '#':
case '$':
case '%':
case '&':
break;
default:
if (c < '*')
return false;
if (c <= '~')
break;
if (c < 128)
return false;
}
}
return true;
}
// 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.
if (string.length() >= (std::numeric_limits<unsigned>::max() / 3) - 2)
return "";
// 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 < string.length(); ++i) {
UChar ch = string[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<UChar> buffer(quotedStringSize);
unsigned index = 0;
buffer[index++] = '\'';
afterEscape = false;
for (unsigned i = 0; i < string.length(); ++i) {
UChar ch = string[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);
}
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");
}
}