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gecko/layout/style/nsCSSParser.cpp
L. David Baron 94e83383a2 Bug 511803 patch 2: Convert all eCSSUnit_Function storage to use nsCSSKeyword. This leads to one behavior change, which is case canonicalization for font-variant-alternates function values. r=bzbarsky 
--HG--
rename : layout/style/test/test_bug721136.html => layout/style/test/test_specified_value_serialization.html
2013-05-23 09:08:29 +08:00

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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=2 et sw=2 tw=78: */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
/* parsing of CSS stylesheets, based on a token stream from the CSS scanner */
#include "mozilla/DebugOnly.h"
#include "nsCSSParser.h"
#include "nsCSSProps.h"
#include "nsCSSKeywords.h"
#include "nsCSSScanner.h"
#include "mozilla/css/ErrorReporter.h"
#include "mozilla/css/Loader.h"
#include "mozilla/css/StyleRule.h"
#include "mozilla/css/ImportRule.h"
#include "nsCSSRules.h"
#include "mozilla/css/NameSpaceRule.h"
#include "nsTArray.h"
#include "nsCSSStyleSheet.h"
#include "mozilla/css/Declaration.h"
#include "nsStyleConsts.h"
#include "nsNetUtil.h"
#include "nsCOMPtr.h"
#include "nsString.h"
#include "nsReadableUtils.h"
#include "nsIAtom.h"
#include "nsColor.h"
#include "nsCSSPseudoClasses.h"
#include "nsCSSPseudoElements.h"
#include "nsINameSpaceManager.h"
#include "nsXMLNameSpaceMap.h"
#include "nsError.h"
#include "nsIMediaList.h"
#include "nsStyleUtil.h"
#include "nsIPrincipal.h"
#include "prprf.h"
#include "nsContentUtils.h"
#include "nsAutoPtr.h"
#include "CSSCalc.h"
#include "nsMediaFeatures.h"
#include "nsLayoutUtils.h"
using namespace mozilla;
// Flags for ParseVariant method
#define VARIANT_KEYWORD 0x000001 // K
#define VARIANT_LENGTH 0x000002 // L
#define VARIANT_PERCENT 0x000004 // P
#define VARIANT_COLOR 0x000008 // C eCSSUnit_Color, eCSSUnit_Ident (e.g. "red")
#define VARIANT_URL 0x000010 // U
#define VARIANT_NUMBER 0x000020 // N
#define VARIANT_INTEGER 0x000040 // I
#define VARIANT_ANGLE 0x000080 // G
#define VARIANT_FREQUENCY 0x000100 // F
#define VARIANT_TIME 0x000200 // T
#define VARIANT_STRING 0x000400 // S
#define VARIANT_COUNTER 0x000800 //
#define VARIANT_ATTR 0x001000 //
#define VARIANT_IDENTIFIER 0x002000 // D
#define VARIANT_IDENTIFIER_NO_INHERIT 0x004000 // like above, but excluding
// 'inherit' and 'initial'
#define VARIANT_AUTO 0x010000 // A
#define VARIANT_INHERIT 0x020000 // H eCSSUnit_Initial, eCSSUnit_Inherit
#define VARIANT_NONE 0x040000 // O
#define VARIANT_NORMAL 0x080000 // M
#define VARIANT_SYSFONT 0x100000 // eCSSUnit_System_Font
#define VARIANT_GRADIENT 0x200000 // eCSSUnit_Gradient
#define VARIANT_TIMING_FUNCTION 0x400000 // cubic-bezier() and steps()
#define VARIANT_ALL 0x800000 //
#define VARIANT_IMAGE_RECT 0x01000000 // eCSSUnit_Function
// This is an extra bit that says that a VARIANT_ANGLE allows unitless zero:
#define VARIANT_ZERO_ANGLE 0x02000000 // unitless zero for angles
#define VARIANT_CALC 0x04000000 // eCSSUnit_Calc
#define VARIANT_ELEMENT 0x08000000 // eCSSUnit_Element
#define VARIANT_POSITIVE_DIMENSION 0x10000000 // Only lengths greater than 0.0
#define VARIANT_NONNEGATIVE_DIMENSION 0x20000000 // Only lengths greater than or equal to 0.0
// Common combinations of variants
#define VARIANT_AL (VARIANT_AUTO | VARIANT_LENGTH)
#define VARIANT_LP (VARIANT_LENGTH | VARIANT_PERCENT)
#define VARIANT_LN (VARIANT_LENGTH | VARIANT_NUMBER)
#define VARIANT_AH (VARIANT_AUTO | VARIANT_INHERIT)
#define VARIANT_AHLP (VARIANT_AH | VARIANT_LP)
#define VARIANT_AHI (VARIANT_AH | VARIANT_INTEGER)
#define VARIANT_AHK (VARIANT_AH | VARIANT_KEYWORD)
#define VARIANT_AHKLP (VARIANT_AHLP | VARIANT_KEYWORD)
#define VARIANT_AHL (VARIANT_AH | VARIANT_LENGTH)
#define VARIANT_AHKL (VARIANT_AHK | VARIANT_LENGTH)
#define VARIANT_HK (VARIANT_INHERIT | VARIANT_KEYWORD)
#define VARIANT_HKF (VARIANT_HK | VARIANT_FREQUENCY)
#define VARIANT_HKI (VARIANT_HK | VARIANT_INTEGER)
#define VARIANT_HKL (VARIANT_HK | VARIANT_LENGTH)
#define VARIANT_HKLP (VARIANT_HK | VARIANT_LP)
#define VARIANT_HKLPO (VARIANT_HKLP | VARIANT_NONE)
#define VARIANT_HL (VARIANT_INHERIT | VARIANT_LENGTH)
#define VARIANT_HI (VARIANT_INHERIT | VARIANT_INTEGER)
#define VARIANT_HLP (VARIANT_HL | VARIANT_PERCENT)
#define VARIANT_HLPN (VARIANT_HLP | VARIANT_NUMBER)
#define VARIANT_HLPO (VARIANT_HLP | VARIANT_NONE)
#define VARIANT_HTP (VARIANT_INHERIT | VARIANT_TIME | VARIANT_PERCENT)
#define VARIANT_HMK (VARIANT_HK | VARIANT_NORMAL)
#define VARIANT_HC (VARIANT_INHERIT | VARIANT_COLOR)
#define VARIANT_HCK (VARIANT_HK | VARIANT_COLOR)
#define VARIANT_HUK (VARIANT_HK | VARIANT_URL)
#define VARIANT_HUO (VARIANT_INHERIT | VARIANT_URL | VARIANT_NONE)
#define VARIANT_AHUO (VARIANT_AUTO | VARIANT_HUO)
#define VARIANT_HPN (VARIANT_INHERIT | VARIANT_PERCENT | VARIANT_NUMBER)
#define VARIANT_PN (VARIANT_PERCENT | VARIANT_NUMBER)
#define VARIANT_ALPN (VARIANT_AL | VARIANT_PN)
#define VARIANT_HN (VARIANT_INHERIT | VARIANT_NUMBER)
#define VARIANT_HON (VARIANT_HN | VARIANT_NONE)
#define VARIANT_HOS (VARIANT_INHERIT | VARIANT_NONE | VARIANT_STRING)
#define VARIANT_LPN (VARIANT_LP | VARIANT_NUMBER)
#define VARIANT_UK (VARIANT_URL | VARIANT_KEYWORD)
#define VARIANT_UO (VARIANT_URL | VARIANT_NONE)
#define VARIANT_ANGLE_OR_ZERO (VARIANT_ANGLE | VARIANT_ZERO_ANGLE)
#define VARIANT_LPCALC (VARIANT_LENGTH | VARIANT_CALC | VARIANT_PERCENT)
#define VARIANT_LNCALC (VARIANT_LENGTH | VARIANT_CALC | VARIANT_NUMBER)
#define VARIANT_LPNCALC (VARIANT_LNCALC | VARIANT_PERCENT)
#define VARIANT_IMAGE (VARIANT_URL | VARIANT_NONE | VARIANT_GRADIENT | \
VARIANT_IMAGE_RECT | VARIANT_ELEMENT)
// This lives here because it depends on the above macros.
const uint32_t
nsCSSProps::kParserVariantTable[eCSSProperty_COUNT_no_shorthands] = {
#define CSS_PROP(name_, id_, method_, flags_, pref_, parsevariant_, kwtable_, \
stylestruct_, stylestructoffset_, animtype_) \
parsevariant_,
#include "nsCSSPropList.h"
#undef CSS_PROP
};
//----------------------------------------------------------------------
namespace {
// Rule processing function
typedef void (* RuleAppendFunc) (css::Rule* aRule, void* aData);
static void AssignRuleToPointer(css::Rule* aRule, void* aPointer);
static void AppendRuleToSheet(css::Rule* aRule, void* aParser);
// Your basic top-down recursive descent style parser
// The exposed methods and members of this class are precisely those
// needed by nsCSSParser, far below.
class CSSParserImpl {
public:
CSSParserImpl();
~CSSParserImpl();
nsresult SetStyleSheet(nsCSSStyleSheet* aSheet);
nsresult SetQuirkMode(bool aQuirkMode);
nsresult SetChildLoader(mozilla::css::Loader* aChildLoader);
// Clears everything set by the above Set*() functions.
void Reset();
nsresult ParseSheet(const nsAString& aInput,
nsIURI* aSheetURI,
nsIURI* aBaseURI,
nsIPrincipal* aSheetPrincipal,
uint32_t aLineNumber,
bool aAllowUnsafeRules);
nsresult ParseStyleAttribute(const nsAString& aAttributeValue,
nsIURI* aDocURL,
nsIURI* aBaseURL,
nsIPrincipal* aNodePrincipal,
css::StyleRule** aResult);
nsresult ParseDeclarations(const nsAString& aBuffer,
nsIURI* aSheetURL,
nsIURI* aBaseURL,
nsIPrincipal* aSheetPrincipal,
css::Declaration* aDeclaration,
bool* aChanged);
nsresult ParseRule(const nsAString& aRule,
nsIURI* aSheetURL,
nsIURI* aBaseURL,
nsIPrincipal* aSheetPrincipal,
css::Rule** aResult);
nsresult ParseProperty(const nsCSSProperty aPropID,
const nsAString& aPropValue,
nsIURI* aSheetURL,
nsIURI* aBaseURL,
nsIPrincipal* aSheetPrincipal,
css::Declaration* aDeclaration,
bool* aChanged,
bool aIsImportant,
bool aIsSVGMode);
nsresult ParseMediaList(const nsSubstring& aBuffer,
nsIURI* aURL, // for error reporting
uint32_t aLineNumber, // for error reporting
nsMediaList* aMediaList,
bool aHTMLMode);
bool ParseColorString(const nsSubstring& aBuffer,
nsIURI* aURL, // for error reporting
uint32_t aLineNumber, // for error reporting
nsCSSValue& aValue);
nsresult ParseSelectorString(const nsSubstring& aSelectorString,
nsIURI* aURL, // for error reporting
uint32_t aLineNumber, // for error reporting
nsCSSSelectorList **aSelectorList);
already_AddRefed<nsCSSKeyframeRule>
ParseKeyframeRule(const nsSubstring& aBuffer,
nsIURI* aURL,
uint32_t aLineNumber);
bool ParseKeyframeSelectorString(const nsSubstring& aSelectorString,
nsIURI* aURL, // for error reporting
uint32_t aLineNumber, // for error reporting
InfallibleTArray<float>& aSelectorList);
bool EvaluateSupportsDeclaration(const nsAString& aProperty,
const nsAString& aValue,
nsIURI* aDocURL,
nsIURI* aBaseURL,
nsIPrincipal* aDocPrincipal);
bool EvaluateSupportsCondition(const nsAString& aCondition,
nsIURI* aDocURL,
nsIURI* aBaseURL,
nsIPrincipal* aDocPrincipal);
protected:
class nsAutoParseCompoundProperty;
friend class nsAutoParseCompoundProperty;
class nsAutoFailingSupportsRule;
friend class nsAutoFailingSupportsRule;
class nsAutoSuppressErrors;
friend class nsAutoSuppressErrors;
void AppendRule(css::Rule* aRule);
friend void AppendRuleToSheet(css::Rule*, void*); // calls AppendRule
/**
* This helper class automatically calls SetParsingCompoundProperty in its
* constructor and takes care of resetting it to false in its destructor.
*/
class nsAutoParseCompoundProperty {
public:
nsAutoParseCompoundProperty(CSSParserImpl* aParser) : mParser(aParser)
{
NS_ASSERTION(!aParser->IsParsingCompoundProperty(),
"already parsing compound property");
NS_ASSERTION(aParser, "Null parser?");
aParser->SetParsingCompoundProperty(true);
}
~nsAutoParseCompoundProperty()
{
mParser->SetParsingCompoundProperty(false);
}
private:
CSSParserImpl* mParser;
};
/**
* This helper class conditionally sets mInFailingSupportsRule to
* true if aCondition = false, and resets it to its original value in its
* destructor. If we are already somewhere within a failing @supports
* rule, passing in aCondition = true does not change mInFailingSupportsRule.
*/
class nsAutoFailingSupportsRule {
public:
nsAutoFailingSupportsRule(CSSParserImpl* aParser,
bool aCondition)
: mParser(aParser),
mOriginalValue(aParser->mInFailingSupportsRule)
{
if (!aCondition) {
mParser->mInFailingSupportsRule = true;
}
}
~nsAutoFailingSupportsRule()
{
mParser->mInFailingSupportsRule = mOriginalValue;
}
private:
CSSParserImpl* mParser;
bool mOriginalValue;
};
/**
* Auto class to set aParser->mSuppressErrors to the specified value
* and restore it to its original value later.
*/
class nsAutoSuppressErrors {
public:
nsAutoSuppressErrors(CSSParserImpl* aParser,
bool aSuppressErrors = true)
: mParser(aParser),
mOriginalValue(aParser->mSuppressErrors)
{
mParser->mSuppressErrors = aSuppressErrors;
}
~nsAutoSuppressErrors()
{
mParser->mSuppressErrors = mOriginalValue;
}
private:
CSSParserImpl* mParser;
bool mOriginalValue;
};
// the caller must hold on to aString until parsing is done
void InitScanner(nsCSSScanner& aScanner,
css::ErrorReporter& aReporter,
nsIURI* aSheetURI, nsIURI* aBaseURI,
nsIPrincipal* aSheetPrincipal);
void ReleaseScanner(void);
bool IsSVGMode() const {
return mScanner->IsSVGMode();
}
bool GetToken(bool aSkipWS);
void UngetToken();
bool GetNextTokenLocation(bool aSkipWS, uint32_t *linenum, uint32_t *colnum);
bool ExpectSymbol(PRUnichar aSymbol, bool aSkipWS);
bool ExpectEndProperty();
bool CheckEndProperty();
nsSubstring* NextIdent();
// returns true when the stop symbol is found, and false for EOF
bool SkipUntil(PRUnichar aStopSymbol);
void SkipUntilOneOf(const PRUnichar* aStopSymbolChars);
void SkipRuleSet(bool aInsideBraces);
bool SkipAtRule(bool aInsideBlock);
bool SkipDeclaration(bool aCheckForBraces);
void PushGroup(css::GroupRule* aRule);
void PopGroup();
bool ParseRuleSet(RuleAppendFunc aAppendFunc, void* aProcessData,
bool aInsideBraces = false);
bool ParseAtRule(RuleAppendFunc aAppendFunc, void* aProcessData,
bool aInAtRule);
bool ParseCharsetRule(RuleAppendFunc aAppendFunc, void* aProcessData);
bool ParseImportRule(RuleAppendFunc aAppendFunc, void* aProcessData);
bool ParseURLOrString(nsString& aURL);
bool GatherMedia(nsMediaList* aMedia,
bool aInAtRule);
bool ParseMediaQuery(bool aInAtRule, nsMediaQuery **aQuery,
bool *aHitStop);
bool ParseMediaQueryExpression(nsMediaQuery* aQuery);
void ProcessImport(const nsString& aURLSpec,
nsMediaList* aMedia,
RuleAppendFunc aAppendFunc,
void* aProcessData);
bool ParseGroupRule(css::GroupRule* aRule, RuleAppendFunc aAppendFunc,
void* aProcessData);
bool ParseMediaRule(RuleAppendFunc aAppendFunc, void* aProcessData);
bool ParseMozDocumentRule(RuleAppendFunc aAppendFunc, void* aProcessData);
bool ParseNameSpaceRule(RuleAppendFunc aAppendFunc, void* aProcessData);
void ProcessNameSpace(const nsString& aPrefix,
const nsString& aURLSpec, RuleAppendFunc aAppendFunc,
void* aProcessData);
bool ParseFontFaceRule(RuleAppendFunc aAppendFunc, void* aProcessData);
bool ParseFontFeatureValuesRule(RuleAppendFunc aAppendFunc,
void* aProcessData);
bool ParseFontFeatureValueSet(nsCSSFontFeatureValuesRule *aRule);
bool ParseFontDescriptor(nsCSSFontFaceRule* aRule);
bool ParseFontDescriptorValue(nsCSSFontDesc aDescID,
nsCSSValue& aValue);
bool ParsePageRule(RuleAppendFunc aAppendFunc, void* aProcessData);
bool ParseKeyframesRule(RuleAppendFunc aAppendFunc, void* aProcessData);
already_AddRefed<nsCSSKeyframeRule> ParseKeyframeRule();
bool ParseKeyframeSelectorList(InfallibleTArray<float>& aSelectorList);
bool ParseSupportsRule(RuleAppendFunc aAppendFunc, void* aProcessData);
bool ParseSupportsCondition(bool& aConditionMet);
bool ParseSupportsConditionNegation(bool& aConditionMet);
bool ParseSupportsConditionInParens(bool& aConditionMet);
bool ParseSupportsConditionInParensInsideParens(bool& aConditionMet);
bool ParseSupportsConditionTerms(bool& aConditionMet);
enum SupportsConditionTermOperator { eAnd, eOr };
bool ParseSupportsConditionTermsAfterOperator(
bool& aConditionMet,
SupportsConditionTermOperator aOperator);
enum nsSelectorParsingStatus {
// we have parsed a selector and we saw a token that cannot be
// part of a selector:
eSelectorParsingStatus_Done,
// we should continue parsing the selector:
eSelectorParsingStatus_Continue,
// we saw an unexpected token or token value,
// or we saw end-of-file with an unfinished selector:
eSelectorParsingStatus_Error
};
nsSelectorParsingStatus ParseIDSelector(int32_t& aDataMask,
nsCSSSelector& aSelector);
nsSelectorParsingStatus ParseClassSelector(int32_t& aDataMask,
nsCSSSelector& aSelector);
// aPseudoElement and aPseudoElementArgs are the location where
// pseudo-elements (as opposed to pseudo-classes) are stored;
// pseudo-classes are stored on aSelector. aPseudoElement and
// aPseudoElementArgs must be non-null iff !aIsNegated.
nsSelectorParsingStatus ParsePseudoSelector(int32_t& aDataMask,
nsCSSSelector& aSelector,
bool aIsNegated,
nsIAtom** aPseudoElement,
nsAtomList** aPseudoElementArgs,
nsCSSPseudoElements::Type* aPseudoElementType);
nsSelectorParsingStatus ParseAttributeSelector(int32_t& aDataMask,
nsCSSSelector& aSelector);
nsSelectorParsingStatus ParseTypeOrUniversalSelector(int32_t& aDataMask,
nsCSSSelector& aSelector,
bool aIsNegated);
nsSelectorParsingStatus ParsePseudoClassWithIdentArg(nsCSSSelector& aSelector,
nsCSSPseudoClasses::Type aType);
nsSelectorParsingStatus ParsePseudoClassWithNthPairArg(nsCSSSelector& aSelector,
nsCSSPseudoClasses::Type aType);
nsSelectorParsingStatus ParsePseudoClassWithSelectorListArg(nsCSSSelector& aSelector,
nsCSSPseudoClasses::Type aType);
nsSelectorParsingStatus ParseNegatedSimpleSelector(int32_t& aDataMask,
nsCSSSelector& aSelector);
// If aStopChar is non-zero, the selector list is done when we hit
// aStopChar. Otherwise, it's done when we hit EOF.
bool ParseSelectorList(nsCSSSelectorList*& aListHead,
PRUnichar aStopChar);
bool ParseSelectorGroup(nsCSSSelectorList*& aListHead);
bool ParseSelector(nsCSSSelectorList* aList, PRUnichar aPrevCombinator);
enum {
eParseDeclaration_InBraces = 1 << 0,
eParseDeclaration_AllowImportant = 1 << 1
};
enum nsCSSContextType {
eCSSContext_General,
eCSSContext_Page
};
css::Declaration* ParseDeclarationBlock(uint32_t aFlags,
nsCSSContextType aContext = eCSSContext_General);
bool ParseDeclaration(css::Declaration* aDeclaration,
uint32_t aFlags,
bool aMustCallValueAppended,
bool* aChanged,
nsCSSContextType aContext = eCSSContext_General);
bool ParseProperty(nsCSSProperty aPropID);
bool ParsePropertyByFunction(nsCSSProperty aPropID);
bool ParseSingleValueProperty(nsCSSValue& aValue,
nsCSSProperty aPropID);
enum PriorityParsingStatus {
ePriority_None,
ePriority_Important,
ePriority_Error
};
PriorityParsingStatus ParsePriority();
#ifdef MOZ_XUL
bool ParseTreePseudoElement(nsAtomList **aPseudoElementArgs);
#endif
void InitBoxPropsAsPhysical(const nsCSSProperty *aSourceProperties);
// Property specific parsing routines
bool ParseBackground();
struct BackgroundParseState {
nsCSSValue& mColor;
nsCSSValueList* mImage;
nsCSSValuePairList* mRepeat;
nsCSSValueList* mAttachment;
nsCSSValueList* mClip;
nsCSSValueList* mOrigin;
nsCSSValueList* mPosition;
nsCSSValuePairList* mSize;
BackgroundParseState(
nsCSSValue& aColor, nsCSSValueList* aImage, nsCSSValuePairList* aRepeat,
nsCSSValueList* aAttachment, nsCSSValueList* aClip,
nsCSSValueList* aOrigin, nsCSSValueList* aPosition,
nsCSSValuePairList* aSize) :
mColor(aColor), mImage(aImage), mRepeat(aRepeat),
mAttachment(aAttachment), mClip(aClip), mOrigin(aOrigin),
mPosition(aPosition), mSize(aSize) {};
};
bool ParseBackgroundItem(BackgroundParseState& aState);
bool ParseValueList(nsCSSProperty aPropID); // a single value prop-id
bool ParseBackgroundRepeat();
bool ParseBackgroundRepeatValues(nsCSSValuePair& aValue);
bool ParseBackgroundPosition();
// ParseBoxPositionValues parses the CSS 2.1 background-position syntax,
// which is still used by some properties. See ParseBackgroundPositionValues
// for the css3-background syntax.
bool ParseBoxPositionValues(nsCSSValuePair& aOut, bool aAcceptsInherit,
bool aAllowExplicitCenter = true); // deprecated
bool ParseBackgroundPositionValues(nsCSSValue& aOut, bool aAcceptsInherit);
bool ParseBackgroundSize();
bool ParseBackgroundSizeValues(nsCSSValuePair& aOut);
bool ParseBorderColor();
bool ParseBorderColors(nsCSSProperty aProperty);
void SetBorderImageInitialValues();
bool ParseBorderImageRepeat(bool aAcceptsInherit);
// If ParseBorderImageSlice returns false, aConsumedTokens indicates
// whether or not any tokens were consumed (in other words, was the property
// in error or just not present). If ParseBorderImageSlice returns true
// aConsumedTokens is always true.
bool ParseBorderImageSlice(bool aAcceptsInherit, bool* aConsumedTokens);
bool ParseBorderImageWidth(bool aAcceptsInherit);
bool ParseBorderImageOutset(bool aAcceptsInherit);
bool ParseBorderImage();
bool ParseBorderSpacing();
bool ParseBorderSide(const nsCSSProperty aPropIDs[],
bool aSetAllSides);
bool ParseDirectionalBorderSide(const nsCSSProperty aPropIDs[],
int32_t aSourceType);
bool ParseBorderStyle();
bool ParseBorderWidth();
bool ParseCalc(nsCSSValue &aValue, int32_t aVariantMask);
bool ParseCalcAdditiveExpression(nsCSSValue& aValue,
int32_t& aVariantMask);
bool ParseCalcMultiplicativeExpression(nsCSSValue& aValue,
int32_t& aVariantMask,
bool *aHadFinalWS);
bool ParseCalcTerm(nsCSSValue& aValue, int32_t& aVariantMask);
bool RequireWhitespace();
// For "flex" shorthand property, defined in CSS3 Flexbox
bool ParseFlex();
// for 'clip' and '-moz-image-region'
bool ParseRect(nsCSSProperty aPropID);
bool ParseColumns();
bool ParseContent();
bool ParseCounterData(nsCSSProperty aPropID);
bool ParseCursor();
bool ParseFont();
bool ParseFontSynthesis(nsCSSValue& aValue);
bool ParseSingleAlternate(int32_t& aWhichFeature, nsCSSValue& aValue);
bool ParseFontVariantAlternates(nsCSSValue& aValue);
bool ParseBitmaskValues(nsCSSValue& aValue, const int32_t aKeywordTable[],
const int32_t aMasks[]);
bool ParseFontVariantEastAsian(nsCSSValue& aValue);
bool ParseFontVariantLigatures(nsCSSValue& aValue);
bool ParseFontVariantNumeric(nsCSSValue& aValue);
bool ParseFontWeight(nsCSSValue& aValue);
bool ParseOneFamily(nsAString& aFamily, bool& aOneKeyword);
bool ParseFamily(nsCSSValue& aValue);
bool ParseFontFeatureSettings(nsCSSValue& aValue);
bool ParseFontSrc(nsCSSValue& aValue);
bool ParseFontSrcFormat(InfallibleTArray<nsCSSValue>& values);
bool ParseFontRanges(nsCSSValue& aValue);
bool ParseListStyle();
bool ParseMargin();
bool ParseMarks(nsCSSValue& aValue);
bool ParseTransform(bool aIsPrefixed);
bool ParseOutline();
bool ParseOverflow();
bool ParsePadding();
bool ParseQuotes();
bool ParseSize();
bool ParseTextDecoration();
bool ParseTextDecorationLine(nsCSSValue& aValue);
bool ParseTextOverflow(nsCSSValue& aValue);
bool ParseShadowItem(nsCSSValue& aValue, bool aIsBoxShadow);
bool ParseShadowList(nsCSSProperty aProperty);
bool ParseTransitionProperty();
bool ParseTransitionTimingFunctionValues(nsCSSValue& aValue);
bool ParseTransitionTimingFunctionValueComponent(float& aComponent,
char aStop,
bool aCheckRange);
bool ParseTransitionStepTimingFunctionValues(nsCSSValue& aValue);
enum ParseAnimationOrTransitionShorthandResult {
eParseAnimationOrTransitionShorthand_Values,
eParseAnimationOrTransitionShorthand_Inherit,
eParseAnimationOrTransitionShorthand_Error
};
ParseAnimationOrTransitionShorthandResult
ParseAnimationOrTransitionShorthand(const nsCSSProperty* aProperties,
const nsCSSValue* aInitialValues,
nsCSSValue* aValues,
size_t aNumProperties);
bool ParseTransition();
bool ParseAnimation();
bool ParsePaint(nsCSSProperty aPropID);
bool ParseDasharray();
bool ParseMarker();
bool ParsePaintOrder();
// Reused utility parsing routines
void AppendValue(nsCSSProperty aPropID, const nsCSSValue& aValue);
bool ParseBoxProperties(const nsCSSProperty aPropIDs[]);
bool ParseGroupedBoxProperty(int32_t aVariantMask,
nsCSSValue& aValue);
bool ParseDirectionalBoxProperty(nsCSSProperty aProperty,
int32_t aSourceType);
bool ParseBoxCornerRadius(const nsCSSProperty aPropID);
bool ParseBoxCornerRadii(const nsCSSProperty aPropIDs[]);
int32_t ParseChoice(nsCSSValue aValues[],
const nsCSSProperty aPropIDs[], int32_t aNumIDs);
bool ParseColor(nsCSSValue& aValue);
bool ParseColorComponent(uint8_t& aComponent,
int32_t& aType, char aStop);
// ParseHSLColor parses everything starting with the opening '('
// up through and including the aStop char.
bool ParseHSLColor(nscolor& aColor, char aStop);
// ParseColorOpacity will enforce that the color ends with a ')'
// after the opacity
bool ParseColorOpacity(uint8_t& aOpacity);
bool ParseEnum(nsCSSValue& aValue, const int32_t aKeywordTable[]);
bool ParseVariant(nsCSSValue& aValue,
int32_t aVariantMask,
const int32_t aKeywordTable[]);
bool ParseNonNegativeVariant(nsCSSValue& aValue,
int32_t aVariantMask,
const int32_t aKeywordTable[]);
bool ParseOneOrLargerVariant(nsCSSValue& aValue,
int32_t aVariantMask,
const int32_t aKeywordTable[]);
bool ParseCounter(nsCSSValue& aValue);
bool ParseAttr(nsCSSValue& aValue);
bool SetValueToURL(nsCSSValue& aValue, const nsString& aURL);
bool TranslateDimension(nsCSSValue& aValue, int32_t aVariantMask,
float aNumber, const nsString& aUnit);
bool ParseImageRect(nsCSSValue& aImage);
bool ParseElement(nsCSSValue& aValue);
bool ParseColorStop(nsCSSValueGradient* aGradient);
bool ParseLinearGradient(nsCSSValue& aValue, bool aIsRepeating,
bool aIsLegacy);
bool ParseRadialGradient(nsCSSValue& aValue, bool aIsRepeating,
bool aIsLegacy);
bool IsLegacyGradientLine(const nsCSSTokenType& aType,
const nsString& aId);
bool ParseGradientColorStops(nsCSSValueGradient* aGradient,
nsCSSValue& aValue);
void SetParsingCompoundProperty(bool aBool) {
mParsingCompoundProperty = aBool;
}
bool IsParsingCompoundProperty(void) const {
return mParsingCompoundProperty;
}
/* Functions for transform Parsing */
bool ParseSingleTransform(bool aIsPrefixed, nsCSSValue& aValue, bool& aIs3D);
bool ParseFunction(nsCSSKeyword aFunction, const int32_t aAllowedTypes[],
int32_t aVariantMaskAll, uint16_t aMinElems,
uint16_t aMaxElems, nsCSSValue &aValue);
bool ParseFunctionInternals(const int32_t aVariantMask[],
int32_t aVariantMaskAll,
uint16_t aMinElems,
uint16_t aMaxElems,
InfallibleTArray<nsCSSValue>& aOutput);
/* Functions for transform-origin/perspective-origin Parsing */
bool ParseTransformOrigin(bool aPerspective);
/* Find and return the namespace ID associated with aPrefix.
If aPrefix has not been declared in an @namespace rule, returns
kNameSpaceID_Unknown. */
int32_t GetNamespaceIdForPrefix(const nsString& aPrefix);
/* Find the correct default namespace, and set it on aSelector. */
void SetDefaultNamespaceOnSelector(nsCSSSelector& aSelector);
// Current token. The value is valid after calling GetToken and invalidated
// by UngetToken.
nsCSSToken mToken;
// Our scanner.
nsCSSScanner* mScanner;
// Our error reporter.
css::ErrorReporter* mReporter;
// The URI to be used as a base for relative URIs.
nsCOMPtr<nsIURI> mBaseURI;
// The URI to be used as an HTTP "Referer" and for error reporting.
nsCOMPtr<nsIURI> mSheetURI;
// The principal of the sheet involved
nsCOMPtr<nsIPrincipal> mSheetPrincipal;
// The sheet we're parsing into
nsRefPtr<nsCSSStyleSheet> mSheet;
// Used for @import rules
mozilla::css::Loader* mChildLoader; // not ref counted, it owns us
// Sheet section we're in. This is used to enforce correct ordering of the
// various rule types (eg the fact that a @charset rule must come before
// anything else). Note that there are checks of similar things in various
// places in nsCSSStyleSheet.cpp (e.g in insertRule, RebuildChildList).
enum nsCSSSection {
eCSSSection_Charset,
eCSSSection_Import,
eCSSSection_NameSpace,
eCSSSection_General
};
nsCSSSection mSection;
nsXMLNameSpaceMap *mNameSpaceMap; // weak, mSheet owns it
// After an UngetToken is done this flag is true. The next call to
// GetToken clears the flag.
bool mHavePushBack : 1;
// True if we are in quirks mode; false in standards or almost standards mode
bool mNavQuirkMode : 1;
// True when the hashless color quirk applies.
bool mHashlessColorQuirk : 1;
// True when the unitless length quirk applies.
bool mUnitlessLengthQuirk : 1;
// True if unsafe rules should be allowed
bool mUnsafeRulesEnabled : 1;
// True if viewport units should be allowed.
bool mViewportUnitsEnabled : 1;
// True for parsing media lists for HTML attributes, where we have to
// ignore CSS comments.
bool mHTMLMediaMode : 1;
// This flag is set when parsing a non-box shorthand; it's used to not apply
// some quirks during shorthand parsing
bool mParsingCompoundProperty : 1;
// True if we are somewhere within a @supports rule whose condition is
// false.
bool mInFailingSupportsRule : 1;
// True if we will suppress all parse errors (except unexpected EOFs).
// This is used to prevent errors for declarations inside a failing
// @supports rule.
bool mSuppressErrors : 1;
// Stack of rule groups; used for @media and such.
InfallibleTArray<nsRefPtr<css::GroupRule> > mGroupStack;
// During the parsing of a property (which may be a shorthand), the data
// are stored in |mTempData|. (It is needed to ensure that parser
// errors cause the data to be ignored, and to ensure that a
// non-'!important' declaration does not override an '!important'
// one.)
nsCSSExpandedDataBlock mTempData;
// All data from successfully parsed properties are placed into |mData|.
nsCSSExpandedDataBlock mData;
public:
// Used from nsCSSParser constructors and destructors
CSSParserImpl* mNextFree;
};
static void AssignRuleToPointer(css::Rule* aRule, void* aPointer)
{
css::Rule **pointer = static_cast<css::Rule**>(aPointer);
NS_ADDREF(*pointer = aRule);
}
static void AppendRuleToSheet(css::Rule* aRule, void* aParser)
{
CSSParserImpl* parser = (CSSParserImpl*) aParser;
parser->AppendRule(aRule);
}
#define REPORT_UNEXPECTED(msg_) \
{ if (!mSuppressErrors) mReporter->ReportUnexpected(#msg_); }
#define REPORT_UNEXPECTED_P(msg_, param_) \
{ if (!mSuppressErrors) mReporter->ReportUnexpected(#msg_, param_); }
#define REPORT_UNEXPECTED_TOKEN(msg_) \
{ if (!mSuppressErrors) mReporter->ReportUnexpected(#msg_, mToken); }
#define REPORT_UNEXPECTED_TOKEN_CHAR(msg_, ch_) \
{ if (!mSuppressErrors) mReporter->ReportUnexpected(#msg_, mToken, ch_); }
#define REPORT_UNEXPECTED_EOF(lf_) \
mReporter->ReportUnexpectedEOF(#lf_)
#define REPORT_UNEXPECTED_EOF_CHAR(ch_) \
mReporter->ReportUnexpectedEOF(ch_)
#define OUTPUT_ERROR() \
mReporter->OutputError()
#define CLEAR_ERROR() \
mReporter->ClearError()
CSSParserImpl::CSSParserImpl()
: mToken(),
mScanner(nullptr),
mReporter(nullptr),
mChildLoader(nullptr),
mSection(eCSSSection_Charset),
mNameSpaceMap(nullptr),
mHavePushBack(false),
mNavQuirkMode(false),
mHashlessColorQuirk(false),
mUnitlessLengthQuirk(false),
mUnsafeRulesEnabled(false),
mViewportUnitsEnabled(true),
mHTMLMediaMode(false),
mParsingCompoundProperty(false),
mInFailingSupportsRule(false),
mSuppressErrors(false),
mNextFree(nullptr)
{
}
CSSParserImpl::~CSSParserImpl()
{
mData.AssertInitialState();
mTempData.AssertInitialState();
}
nsresult
CSSParserImpl::SetStyleSheet(nsCSSStyleSheet* aSheet)
{
if (aSheet != mSheet) {
// Switch to using the new sheet, if any
mGroupStack.Clear();
mSheet = aSheet;
if (mSheet) {
mNameSpaceMap = mSheet->GetNameSpaceMap();
} else {
mNameSpaceMap = nullptr;
}
} else if (mSheet) {
mNameSpaceMap = mSheet->GetNameSpaceMap();
}
return NS_OK;
}
nsresult
CSSParserImpl::SetQuirkMode(bool aQuirkMode)
{
mNavQuirkMode = aQuirkMode;
return NS_OK;
}
nsresult
CSSParserImpl::SetChildLoader(mozilla::css::Loader* aChildLoader)
{
mChildLoader = aChildLoader; // not ref counted, it owns us
return NS_OK;
}
void
CSSParserImpl::Reset()
{
NS_ASSERTION(!mScanner, "resetting with scanner active");
SetStyleSheet(nullptr);
SetQuirkMode(false);
SetChildLoader(nullptr);
}
void
CSSParserImpl::InitScanner(nsCSSScanner& aScanner,
css::ErrorReporter& aReporter,
nsIURI* aSheetURI, nsIURI* aBaseURI,
nsIPrincipal* aSheetPrincipal)
{
NS_PRECONDITION(!mHTMLMediaMode, "Bad initial state");
NS_PRECONDITION(!mParsingCompoundProperty, "Bad initial state");
NS_PRECONDITION(!mScanner, "already have scanner");
mScanner = &aScanner;
mReporter = &aReporter;
mScanner->SetErrorReporter(mReporter);
mBaseURI = aBaseURI;
mSheetURI = aSheetURI;
mSheetPrincipal = aSheetPrincipal;
mHavePushBack = false;
}
void
CSSParserImpl::ReleaseScanner()
{
mScanner = nullptr;
mReporter = nullptr;
mBaseURI = nullptr;
mSheetURI = nullptr;
mSheetPrincipal = nullptr;
}
nsresult
CSSParserImpl::ParseSheet(const nsAString& aInput,
nsIURI* aSheetURI,
nsIURI* aBaseURI,
nsIPrincipal* aSheetPrincipal,
uint32_t aLineNumber,
bool aAllowUnsafeRules)
{
NS_PRECONDITION(aSheetPrincipal, "Must have principal here!");
NS_PRECONDITION(aBaseURI, "need base URI");
NS_PRECONDITION(aSheetURI, "need sheet URI");
NS_PRECONDITION(mSheet, "Must have sheet to parse into");
NS_ENSURE_STATE(mSheet);
#ifdef DEBUG
nsIURI* uri = mSheet->GetSheetURI();
bool equal;
NS_ASSERTION(NS_SUCCEEDED(aSheetURI->Equals(uri, &equal)) && equal,
"Sheet URI does not match passed URI");
NS_ASSERTION(NS_SUCCEEDED(mSheet->Principal()->Equals(aSheetPrincipal,
&equal)) &&
equal,
"Sheet principal does not match passed principal");
#endif
nsCSSScanner scanner(aInput, aLineNumber);
css::ErrorReporter reporter(scanner, mSheet, mChildLoader, aSheetURI);
InitScanner(scanner, reporter, aSheetURI, aBaseURI, aSheetPrincipal);
int32_t ruleCount = mSheet->StyleRuleCount();
if (0 < ruleCount) {
css::Rule* lastRule = nullptr;
mSheet->GetStyleRuleAt(ruleCount - 1, lastRule);
if (lastRule) {
switch (lastRule->GetType()) {
case css::Rule::CHARSET_RULE:
case css::Rule::IMPORT_RULE:
mSection = eCSSSection_Import;
break;
case css::Rule::NAMESPACE_RULE:
mSection = eCSSSection_NameSpace;
break;
default:
mSection = eCSSSection_General;
break;
}
NS_RELEASE(lastRule);
}
}
else {
mSection = eCSSSection_Charset; // sheet is empty, any rules are fair
}
mUnsafeRulesEnabled = aAllowUnsafeRules;
nsCSSToken* tk = &mToken;
for (;;) {
// Get next non-whitespace token
if (!GetToken(true)) {
OUTPUT_ERROR();
break;
}
if (eCSSToken_HTMLComment == tk->mType) {
continue; // legal here only
}
if (eCSSToken_AtKeyword == tk->mType) {
ParseAtRule(AppendRuleToSheet, this, false);
continue;
}
UngetToken();
if (ParseRuleSet(AppendRuleToSheet, this)) {
mSection = eCSSSection_General;
}
}
ReleaseScanner();
mUnsafeRulesEnabled = false;
// XXX check for low level errors
return NS_OK;
}
/**
* Determines whether the identifier contained in the given string is a
* vendor-specific identifier, as described in CSS 2.1 section 4.1.2.1.
*/
static bool
NonMozillaVendorIdentifier(const nsAString& ident)
{
return (ident.First() == PRUnichar('-') &&
!StringBeginsWith(ident, NS_LITERAL_STRING("-moz-"))) ||
ident.First() == PRUnichar('_');
}
nsresult
CSSParserImpl::ParseStyleAttribute(const nsAString& aAttributeValue,
nsIURI* aDocURI,
nsIURI* aBaseURI,
nsIPrincipal* aNodePrincipal,
css::StyleRule** aResult)
{
NS_PRECONDITION(aNodePrincipal, "Must have principal here!");
NS_PRECONDITION(aBaseURI, "need base URI");
// XXX line number?
nsCSSScanner scanner(aAttributeValue, 0);
css::ErrorReporter reporter(scanner, mSheet, mChildLoader, aDocURI);
InitScanner(scanner, reporter, aDocURI, aBaseURI, aNodePrincipal);
mSection = eCSSSection_General;
// In quirks mode, allow style declarations to have braces or not
// (bug 99554).
bool haveBraces;
if (mNavQuirkMode && GetToken(true)) {
haveBraces = eCSSToken_Symbol == mToken.mType &&
'{' == mToken.mSymbol;
UngetToken();
}
else {
haveBraces = false;
}
uint32_t parseFlags = eParseDeclaration_AllowImportant;
if (haveBraces) {
parseFlags |= eParseDeclaration_InBraces;
}
css::Declaration* declaration = ParseDeclarationBlock(parseFlags);
if (declaration) {
// Create a style rule for the declaration
NS_ADDREF(*aResult = new css::StyleRule(nullptr, declaration));
} else {
*aResult = nullptr;
}
ReleaseScanner();
// XXX check for low level errors
return NS_OK;
}
nsresult
CSSParserImpl::ParseDeclarations(const nsAString& aBuffer,
nsIURI* aSheetURI,
nsIURI* aBaseURI,
nsIPrincipal* aSheetPrincipal,
css::Declaration* aDeclaration,
bool* aChanged)
{
*aChanged = false;
NS_PRECONDITION(aSheetPrincipal, "Must have principal here!");
nsCSSScanner scanner(aBuffer, 0);
css::ErrorReporter reporter(scanner, mSheet, mChildLoader, aSheetURI);
InitScanner(scanner, reporter, aSheetURI, aBaseURI, aSheetPrincipal);
mSection = eCSSSection_General;
mData.AssertInitialState();
aDeclaration->ClearData();
// We could check if it was already empty, but...
*aChanged = true;
for (;;) {
// If we cleared the old decl, then we want to be calling
// ValueAppended as we parse.
if (!ParseDeclaration(aDeclaration, eParseDeclaration_AllowImportant,
true, aChanged)) {
if (!SkipDeclaration(false)) {
break;
}
}
}
aDeclaration->CompressFrom(&mData);
ReleaseScanner();
return NS_OK;
}
nsresult
CSSParserImpl::ParseRule(const nsAString& aRule,
nsIURI* aSheetURI,
nsIURI* aBaseURI,
nsIPrincipal* aSheetPrincipal,
css::Rule** aResult)
{
NS_PRECONDITION(aSheetPrincipal, "Must have principal here!");
NS_PRECONDITION(aBaseURI, "need base URI");
*aResult = nullptr;
nsCSSScanner scanner(aRule, 0);
css::ErrorReporter reporter(scanner, mSheet, mChildLoader, aSheetURI);
InitScanner(scanner, reporter, aSheetURI, aBaseURI, aSheetPrincipal);
mSection = eCSSSection_Charset; // callers are responsible for rejecting invalid rules.
nsCSSToken* tk = &mToken;
// Get first non-whitespace token
nsresult rv = NS_OK;
if (!GetToken(true)) {
REPORT_UNEXPECTED(PEParseRuleWSOnly);
OUTPUT_ERROR();
rv = NS_ERROR_DOM_SYNTAX_ERR;
} else {
if (eCSSToken_AtKeyword == tk->mType) {
// FIXME: perhaps aInsideBlock should be true when we are?
ParseAtRule(AssignRuleToPointer, aResult, false);
} else {
UngetToken();
ParseRuleSet(AssignRuleToPointer, aResult);
}
if (*aResult && GetToken(true)) {
// garbage after rule
REPORT_UNEXPECTED_TOKEN(PERuleTrailing);
NS_RELEASE(*aResult);
}
if (!*aResult) {
rv = NS_ERROR_DOM_SYNTAX_ERR;
OUTPUT_ERROR();
}
}
ReleaseScanner();
return rv;
}
// See Bug 723197
#ifdef _MSC_VER
#pragma optimize( "", off )
#pragma warning( push )
#pragma warning( disable : 4748 )
#endif
nsresult
CSSParserImpl::ParseProperty(const nsCSSProperty aPropID,
const nsAString& aPropValue,
nsIURI* aSheetURI,
nsIURI* aBaseURI,
nsIPrincipal* aSheetPrincipal,
css::Declaration* aDeclaration,
bool* aChanged,
bool aIsImportant,
bool aIsSVGMode)
{
NS_PRECONDITION(aSheetPrincipal, "Must have principal here!");
NS_PRECONDITION(aBaseURI, "need base URI");
NS_PRECONDITION(aDeclaration, "Need declaration to parse into!");
mData.AssertInitialState();
mTempData.AssertInitialState();
aDeclaration->AssertMutable();
nsCSSScanner scanner(aPropValue, 0);
css::ErrorReporter reporter(scanner, mSheet, mChildLoader, aSheetURI);
InitScanner(scanner, reporter, aSheetURI, aBaseURI, aSheetPrincipal);
mSection = eCSSSection_General;
scanner.SetSVGMode(aIsSVGMode);
*aChanged = false;
// Check for unknown or preffed off properties
if (eCSSProperty_UNKNOWN == aPropID || !nsCSSProps::IsEnabled(aPropID)) {
NS_ConvertASCIItoUTF16 propName(nsCSSProps::GetStringValue(aPropID));
REPORT_UNEXPECTED_P(PEUnknownProperty, propName);
REPORT_UNEXPECTED(PEDeclDropped);
OUTPUT_ERROR();
ReleaseScanner();
return NS_OK;
}
bool parsedOK = ParseProperty(aPropID);
// We should now be at EOF
if (parsedOK && GetToken(true)) {
REPORT_UNEXPECTED_TOKEN(PEExpectEndValue);
parsedOK = false;
}
if (!parsedOK) {
NS_ConvertASCIItoUTF16 propName(nsCSSProps::GetStringValue(aPropID));
REPORT_UNEXPECTED_P(PEValueParsingError, propName);
REPORT_UNEXPECTED(PEDeclDropped);
OUTPUT_ERROR();
mTempData.ClearProperty(aPropID);
} else {
// We know we don't need to force a ValueAppended call for the new
// value. So if we are not processing a shorthand, and there's
// already a value for this property in the declaration at the
// same importance level, then we can just copy our parsed value
// directly into the declaration without going through the whole
// expand/compress thing.
if (!aDeclaration->TryReplaceValue(aPropID, aIsImportant, mTempData,
aChanged)) {
// Do it the slow way
aDeclaration->ExpandTo(&mData);
*aChanged = mData.TransferFromBlock(mTempData, aPropID, aIsImportant,
true, false, aDeclaration);
aDeclaration->CompressFrom(&mData);
}
CLEAR_ERROR();
}
mTempData.AssertInitialState();
ReleaseScanner();
return NS_OK;
}
#ifdef _MSC_VER
#pragma warning( pop )
#pragma optimize( "", on )
#endif
nsresult
CSSParserImpl::ParseMediaList(const nsSubstring& aBuffer,
nsIURI* aURI, // for error reporting
uint32_t aLineNumber, // for error reporting
nsMediaList* aMediaList,
bool aHTMLMode)
{
// XXX Are there cases where the caller wants to keep what it already
// has in case of parser error? If GatherMedia ever changes to return
// a value other than true, we probably should avoid modifying aMediaList.
aMediaList->Clear();
// fake base URI since media lists don't have URIs in them
nsCSSScanner scanner(aBuffer, aLineNumber);
css::ErrorReporter reporter(scanner, mSheet, mChildLoader, aURI);
InitScanner(scanner, reporter, aURI, aURI, nullptr);
mHTMLMediaMode = aHTMLMode;
// XXXldb We need to make the scanner not skip CSS comments! (Or
// should we?)
// For aHTMLMode, we used to follow the parsing rules in
// http://www.w3.org/TR/1999/REC-html401-19991224/types.html#type-media-descriptors
// which wouldn't work for media queries since they remove all but the
// first word. However, they're changed in
// http://www.whatwg.org/specs/web-apps/current-work/multipage/section-document.html#media2
// (as of 2008-05-29) which says that the media attribute just points
// to a media query. (The main substative difference is the relative
// precedence of commas and paretheses.)
DebugOnly<bool> parsedOK = GatherMedia(aMediaList, false);
NS_ASSERTION(parsedOK, "GatherMedia returned false; we probably want to avoid "
"trashing aMediaList");
CLEAR_ERROR();
ReleaseScanner();
mHTMLMediaMode = false;
return NS_OK;
}
bool
CSSParserImpl::ParseColorString(const nsSubstring& aBuffer,
nsIURI* aURI, // for error reporting
uint32_t aLineNumber, // for error reporting
nsCSSValue& aValue)
{
nsCSSScanner scanner(aBuffer, aLineNumber);
css::ErrorReporter reporter(scanner, mSheet, mChildLoader, aURI);
InitScanner(scanner, reporter, aURI, aURI, nullptr);
// Parse a color, and check that there's nothing else after it.
bool colorParsed = ParseColor(aValue) && !GetToken(true);
OUTPUT_ERROR();
ReleaseScanner();
return colorParsed;
}
nsresult
CSSParserImpl::ParseSelectorString(const nsSubstring& aSelectorString,
nsIURI* aURI, // for error reporting
uint32_t aLineNumber, // for error reporting
nsCSSSelectorList **aSelectorList)
{
nsCSSScanner scanner(aSelectorString, aLineNumber);
css::ErrorReporter reporter(scanner, mSheet, mChildLoader, aURI);
InitScanner(scanner, reporter, aURI, aURI, nullptr);
bool success = ParseSelectorList(*aSelectorList, PRUnichar(0));
// We deliberately do not call OUTPUT_ERROR here, because all our
// callers map a failure return to a JS exception, and if that JS
// exception is caught, people don't want to see parser diagnostics;
// see e.g. http://bugs.jquery.com/ticket/7535
// It would be nice to be able to save the parser diagnostics into
// the exception, so that if it _isn't_ caught we can report them
// along with the usual uncaught-exception message, but we don't
// have any way to do that at present; see bug 631621.
CLEAR_ERROR();
ReleaseScanner();
if (success) {
NS_ASSERTION(*aSelectorList, "Should have list!");
return NS_OK;
}
NS_ASSERTION(!*aSelectorList, "Shouldn't have list!");
return NS_ERROR_DOM_SYNTAX_ERR;
}
already_AddRefed<nsCSSKeyframeRule>
CSSParserImpl::ParseKeyframeRule(const nsSubstring& aBuffer,
nsIURI* aURI,
uint32_t aLineNumber)
{
nsCSSScanner scanner(aBuffer, aLineNumber);
css::ErrorReporter reporter(scanner, mSheet, mChildLoader, aURI);
InitScanner(scanner, reporter, aURI, aURI, nullptr);
nsRefPtr<nsCSSKeyframeRule> result = ParseKeyframeRule();
if (GetToken(true)) {
// extra garbage at the end
result = nullptr;
}
OUTPUT_ERROR();
ReleaseScanner();
return result.forget();
}
bool
CSSParserImpl::ParseKeyframeSelectorString(const nsSubstring& aSelectorString,
nsIURI* aURI, // for error reporting
uint32_t aLineNumber, // for error reporting
InfallibleTArray<float>& aSelectorList)
{
NS_ABORT_IF_FALSE(aSelectorList.IsEmpty(), "given list should start empty");
nsCSSScanner scanner(aSelectorString, aLineNumber);
css::ErrorReporter reporter(scanner, mSheet, mChildLoader, aURI);
InitScanner(scanner, reporter, aURI, aURI, nullptr);
bool success = ParseKeyframeSelectorList(aSelectorList) &&
// must consume entire input string
!GetToken(true);
OUTPUT_ERROR();
ReleaseScanner();
if (success) {
NS_ASSERTION(!aSelectorList.IsEmpty(), "should not be empty");
} else {
aSelectorList.Clear();
}
return success;
}
bool
CSSParserImpl::EvaluateSupportsDeclaration(const nsAString& aProperty,
const nsAString& aValue,
nsIURI* aDocURL,
nsIURI* aBaseURL,
nsIPrincipal* aDocPrincipal)
{
nsCSSProperty propID = nsCSSProps::LookupProperty(aProperty,
nsCSSProps::eEnabled);
if (propID == eCSSProperty_UNKNOWN) {
return false;
}
nsCSSScanner scanner(aValue, 0);
css::ErrorReporter reporter(scanner, mSheet, mChildLoader, aDocURL);
InitScanner(scanner, reporter, aDocURL, aBaseURL, aDocPrincipal);
nsAutoSuppressErrors suppressErrors(this);
bool parsedOK = ParseProperty(propID) && !GetToken(true);
CLEAR_ERROR();
ReleaseScanner();
mTempData.ClearProperty(propID);
mTempData.AssertInitialState();
return parsedOK;
}
bool
CSSParserImpl::EvaluateSupportsCondition(const nsAString& aDeclaration,
nsIURI* aDocURL,
nsIURI* aBaseURL,
nsIPrincipal* aDocPrincipal)
{
nsCSSScanner scanner(aDeclaration, 0);
css::ErrorReporter reporter(scanner, mSheet, mChildLoader, aDocURL);
InitScanner(scanner, reporter, aDocURL, aBaseURL, aDocPrincipal);
nsAutoSuppressErrors suppressErrors(this);
bool conditionMet;
bool parsedOK = ParseSupportsCondition(conditionMet) && !GetToken(true);
CLEAR_ERROR();
ReleaseScanner();
return parsedOK && conditionMet;
}
//----------------------------------------------------------------------
bool
CSSParserImpl::GetToken(bool aSkipWS)
{
if (mHavePushBack) {
mHavePushBack = false;
if (!aSkipWS || mToken.mType != eCSSToken_Whitespace) {
return true;
}
}
return mScanner->Next(mToken, aSkipWS);
}
void
CSSParserImpl::UngetToken()
{
NS_PRECONDITION(!mHavePushBack, "double pushback");
mHavePushBack = true;
}
bool
CSSParserImpl::GetNextTokenLocation(bool aSkipWS, uint32_t *linenum, uint32_t *colnum)
{
// Peek at next token so that mScanner updates line and column vals
if (!GetToken(aSkipWS)) {
return false;
}
UngetToken();
// The scanner uses one-indexing for line numbers but zero-indexing
// for column numbers.
*linenum = mScanner->GetLineNumber();
*colnum = 1 + mScanner->GetColumnNumber();
return true;
}
bool
CSSParserImpl::ExpectSymbol(PRUnichar aSymbol,
bool aSkipWS)
{
if (!GetToken(aSkipWS)) {
// CSS2.1 specifies that all "open constructs" are to be closed at
// EOF. It simplifies higher layers if we claim to have found an
// ), ], }, or ; if we encounter EOF while looking for one of them.
// Do still issue a diagnostic, to aid debugging.
if (aSymbol == ')' || aSymbol == ']' ||
aSymbol == '}' || aSymbol == ';') {
REPORT_UNEXPECTED_EOF_CHAR(aSymbol);
return true;
}
else
return false;
}
if (mToken.IsSymbol(aSymbol)) {
return true;
}
UngetToken();
return false;
}
// Checks to see if we're at the end of a property. If an error occurs during
// the check, does not signal a parse error.
bool
CSSParserImpl::CheckEndProperty()
{
if (!GetToken(true)) {
return true; // properties may end with eof
}
if ((eCSSToken_Symbol == mToken.mType) &&
((';' == mToken.mSymbol) ||
('!' == mToken.mSymbol) ||
('}' == mToken.mSymbol) ||
(')' == mToken.mSymbol))) {
// XXX need to verify that ! is only followed by "important [;|}]
// XXX this requires a multi-token pushback buffer
UngetToken();
return true;
}
UngetToken();
return false;
}
// Checks if we're at the end of a property, raising an error if we're not.
bool
CSSParserImpl::ExpectEndProperty()
{
if (CheckEndProperty())
return true;
// If we're here, we read something incorrect, so we should report it.
REPORT_UNEXPECTED_TOKEN(PEExpectEndValue);
return false;
}
// Parses the priority suffix on a property, which at present may be
// either '!important' or nothing.
CSSParserImpl::PriorityParsingStatus
CSSParserImpl::ParsePriority()
{
if (!GetToken(true)) {
return ePriority_None; // properties may end with EOF
}
if (!mToken.IsSymbol('!')) {
UngetToken();
return ePriority_None; // dunno what it is, but it's not a priority
}
if (!GetToken(true)) {
// EOF is not ok after !
REPORT_UNEXPECTED_EOF(PEImportantEOF);
return ePriority_Error;
}
if (mToken.mType != eCSSToken_Ident ||
!mToken.mIdent.LowerCaseEqualsLiteral("important")) {
REPORT_UNEXPECTED_TOKEN(PEExpectedImportant);
UngetToken();
return ePriority_Error;
}
return ePriority_Important;
}
nsSubstring*
CSSParserImpl::NextIdent()
{
// XXX Error reporting?
if (!GetToken(true)) {
return nullptr;
}
if (eCSSToken_Ident != mToken.mType) {
UngetToken();
return nullptr;
}
return &mToken.mIdent;
}
bool
CSSParserImpl::SkipAtRule(bool aInsideBlock)
{
for (;;) {
if (!GetToken(true)) {
REPORT_UNEXPECTED_EOF(PESkipAtRuleEOF2);
return false;
}
if (eCSSToken_Symbol == mToken.mType) {
PRUnichar symbol = mToken.mSymbol;
if (symbol == ';') {
break;
}
if (aInsideBlock && symbol == '}') {
// The closing } doesn't belong to us.
UngetToken();
break;
}
if (symbol == '{') {
SkipUntil('}');
break;
} else if (symbol == '(') {
SkipUntil(')');
} else if (symbol == '[') {
SkipUntil(']');
}
} else if (eCSSToken_Function == mToken.mType ||
eCSSToken_Bad_URL == mToken.mType) {
SkipUntil(')');
}
}
return true;
}
bool
CSSParserImpl::ParseAtRule(RuleAppendFunc aAppendFunc,
void* aData,
bool aInAtRule)
{
nsCSSSection newSection;
bool (CSSParserImpl::*parseFunc)(RuleAppendFunc, void*);
if ((mSection <= eCSSSection_Charset) &&
(mToken.mIdent.LowerCaseEqualsLiteral("charset"))) {
parseFunc = &CSSParserImpl::ParseCharsetRule;
newSection = eCSSSection_Import; // only one charset allowed
} else if ((mSection <= eCSSSection_Import) &&
mToken.mIdent.LowerCaseEqualsLiteral("import")) {
parseFunc = &CSSParserImpl::ParseImportRule;
newSection = eCSSSection_Import;
} else if ((mSection <= eCSSSection_NameSpace) &&
mToken.mIdent.LowerCaseEqualsLiteral("namespace")) {
parseFunc = &CSSParserImpl::ParseNameSpaceRule;
newSection = eCSSSection_NameSpace;
} else if (mToken.mIdent.LowerCaseEqualsLiteral("media")) {
parseFunc = &CSSParserImpl::ParseMediaRule;
newSection = eCSSSection_General;
} else if (mToken.mIdent.LowerCaseEqualsLiteral("-moz-document")) {
parseFunc = &CSSParserImpl::ParseMozDocumentRule;
newSection = eCSSSection_General;
} else if (mToken.mIdent.LowerCaseEqualsLiteral("font-face")) {
parseFunc = &CSSParserImpl::ParseFontFaceRule;
newSection = eCSSSection_General;
} else if (mToken.mIdent.LowerCaseEqualsLiteral("font-feature-values") &&
nsCSSFontFeatureValuesRule::PrefEnabled()) {
parseFunc = &CSSParserImpl::ParseFontFeatureValuesRule;
newSection = eCSSSection_General;
} else if (mToken.mIdent.LowerCaseEqualsLiteral("page")) {
parseFunc = &CSSParserImpl::ParsePageRule;
newSection = eCSSSection_General;
} else if ((nsCSSProps::IsEnabled(eCSSPropertyAlias_MozAnimation) &&
mToken.mIdent.LowerCaseEqualsLiteral("-moz-keyframes")) ||
mToken.mIdent.LowerCaseEqualsLiteral("keyframes")) {
parseFunc = &CSSParserImpl::ParseKeyframesRule;
newSection = eCSSSection_General;
} else if (mToken.mIdent.LowerCaseEqualsLiteral("supports") &&
CSSSupportsRule::PrefEnabled()) {
parseFunc = &CSSParserImpl::ParseSupportsRule;
newSection = eCSSSection_General;
} else {
if (!NonMozillaVendorIdentifier(mToken.mIdent)) {
REPORT_UNEXPECTED_TOKEN(PEUnknownAtRule);
OUTPUT_ERROR();
}
// Skip over unsupported at rule, don't advance section
return SkipAtRule(aInAtRule);
}
// Inside of @-rules, only the rules that can occur anywhere
// are allowed.
bool unnestable = aInAtRule && newSection != eCSSSection_General;
if (unnestable) {
REPORT_UNEXPECTED_TOKEN(PEGroupRuleNestedAtRule);
}
if (unnestable || !(this->*parseFunc)(aAppendFunc, aData)) {
// Skip over invalid at rule, don't advance section
OUTPUT_ERROR();
return SkipAtRule(aInAtRule);
}
// Nested @-rules don't affect the top-level rule chain requirement
if (!aInAtRule) {
mSection = newSection;
}
return true;
}
bool
CSSParserImpl::ParseCharsetRule(RuleAppendFunc aAppendFunc,
void* aData)
{
if (!GetToken(true)) {
REPORT_UNEXPECTED_EOF(PECharsetRuleEOF);
return false;
}
if (eCSSToken_String != mToken.mType) {
UngetToken();
REPORT_UNEXPECTED_TOKEN(PECharsetRuleNotString);
return false;
}
nsAutoString charset = mToken.mIdent;
if (!ExpectSymbol(';', true)) {
return false;
}
nsRefPtr<css::CharsetRule> rule = new css::CharsetRule(charset);
(*aAppendFunc)(rule, aData);
return true;
}
bool
CSSParserImpl::ParseURLOrString(nsString& aURL)
{
if (!GetToken(true)) {
return false;
}
if (eCSSToken_String == mToken.mType || eCSSToken_URL == mToken.mType) {
aURL = mToken.mIdent;
return true;
}
UngetToken();
return false;
}
bool
CSSParserImpl::ParseMediaQuery(bool aInAtRule,
nsMediaQuery **aQuery,
bool *aHitStop)
{
*aQuery = nullptr;
*aHitStop = false;
// "If the comma-separated list is the empty list it is assumed to
// specify the media query 'all'." (css3-mediaqueries, section
// "Media Queries")
if (!GetToken(true)) {
*aHitStop = true;
// expected termination by EOF
if (!aInAtRule)
return true;
// unexpected termination by EOF
REPORT_UNEXPECTED_EOF(PEGatherMediaEOF);
return true;
}
if (eCSSToken_Symbol == mToken.mType && aInAtRule &&
(mToken.mSymbol == ';' || mToken.mSymbol == '{' || mToken.mSymbol == '}' )) {
*aHitStop = true;
UngetToken();
return true;
}
UngetToken();
nsMediaQuery* query = new nsMediaQuery;
*aQuery = query;
if (ExpectSymbol('(', true)) {
// we got an expression without a media type
UngetToken(); // so ParseMediaQueryExpression can handle it
query->SetType(nsGkAtoms::all);
query->SetTypeOmitted();
// Just parse the first expression here.
if (!ParseMediaQueryExpression(query)) {
OUTPUT_ERROR();
query->SetHadUnknownExpression();
}
} else {
nsCOMPtr<nsIAtom> mediaType;
bool gotNotOrOnly = false;
for (;;) {
if (!GetToken(true)) {
REPORT_UNEXPECTED_EOF(PEGatherMediaEOF);
return false;
}
if (eCSSToken_Ident != mToken.mType) {
REPORT_UNEXPECTED_TOKEN(PEGatherMediaNotIdent);
UngetToken();
return false;
}
// case insensitive from CSS - must be lower cased
nsContentUtils::ASCIIToLower(mToken.mIdent);
mediaType = do_GetAtom(mToken.mIdent);
if (!mediaType) {
NS_RUNTIMEABORT("do_GetAtom failed - out of memory?");
}
if (gotNotOrOnly ||
(mediaType != nsGkAtoms::_not && mediaType != nsGkAtoms::only))
break;
gotNotOrOnly = true;
if (mediaType == nsGkAtoms::_not)
query->SetNegated();
else
query->SetHasOnly();
}
query->SetType(mediaType);
}
for (;;) {
if (!GetToken(true)) {
*aHitStop = true;
// expected termination by EOF
if (!aInAtRule)
break;
// unexpected termination by EOF
REPORT_UNEXPECTED_EOF(PEGatherMediaEOF);
break;
}
if (eCSSToken_Symbol == mToken.mType && aInAtRule &&
(mToken.mSymbol == ';' || mToken.mSymbol == '{' || mToken.mSymbol == '}')) {
*aHitStop = true;
UngetToken();
break;
}
if (eCSSToken_Symbol == mToken.mType && mToken.mSymbol == ',') {
// Done with the expressions for this query
break;
}
if (eCSSToken_Ident != mToken.mType ||
!mToken.mIdent.LowerCaseEqualsLiteral("and")) {
REPORT_UNEXPECTED_TOKEN(PEGatherMediaNotComma);
UngetToken();
return false;
}
if (!ParseMediaQueryExpression(query)) {
OUTPUT_ERROR();
query->SetHadUnknownExpression();
}
}
return true;
}
// Returns false only when there is a low-level error in the scanner
// (out-of-memory).
bool
CSSParserImpl::GatherMedia(nsMediaList* aMedia,
bool aInAtRule)
{
for (;;) {
nsAutoPtr<nsMediaQuery> query;
bool hitStop;
if (!ParseMediaQuery(aInAtRule, getter_Transfers(query),
&hitStop)) {
NS_ASSERTION(!hitStop, "should return true when hit stop");
OUTPUT_ERROR();
if (query) {
query->SetHadUnknownExpression();
}
if (aInAtRule) {
const PRUnichar stopChars[] =
{ PRUnichar(','), PRUnichar('{'), PRUnichar(';'), PRUnichar('}'), PRUnichar(0) };
SkipUntilOneOf(stopChars);
} else {
SkipUntil(',');
}
// Rely on SkipUntilOneOf leaving mToken around as the last token read.
if (mToken.mType == eCSSToken_Symbol && aInAtRule &&
(mToken.mSymbol == '{' || mToken.mSymbol == ';' || mToken.mSymbol == '}')) {
UngetToken();
hitStop = true;
}
}
if (query) {
aMedia->AppendQuery(query);
}
if (hitStop) {
break;
}
}
return true;
}
bool
CSSParserImpl::ParseMediaQueryExpression(nsMediaQuery* aQuery)
{
if (!ExpectSymbol('(', true)) {
REPORT_UNEXPECTED_TOKEN(PEMQExpectedExpressionStart);
return false;
}
if (! GetToken(true)) {
REPORT_UNEXPECTED_EOF(PEMQExpressionEOF);
return false;
}
if (eCSSToken_Ident != mToken.mType) {
REPORT_UNEXPECTED_TOKEN(PEMQExpectedFeatureName);
UngetToken();
SkipUntil(')');
return false;
}
nsMediaExpression *expr = aQuery->NewExpression();
// case insensitive from CSS - must be lower cased
nsContentUtils::ASCIIToLower(mToken.mIdent);
const PRUnichar *featureString;
if (StringBeginsWith(mToken.mIdent, NS_LITERAL_STRING("min-"))) {
expr->mRange = nsMediaExpression::eMin;
featureString = mToken.mIdent.get() + 4;
} else if (StringBeginsWith(mToken.mIdent, NS_LITERAL_STRING("max-"))) {
expr->mRange = nsMediaExpression::eMax;
featureString = mToken.mIdent.get() + 4;
} else {
expr->mRange = nsMediaExpression::eEqual;
featureString = mToken.mIdent.get();
}
nsCOMPtr<nsIAtom> mediaFeatureAtom = do_GetAtom(featureString);
if (!mediaFeatureAtom) {
NS_RUNTIMEABORT("do_GetAtom failed - out of memory?");
}
const nsMediaFeature *feature = nsMediaFeatures::features;
for (; feature->mName; ++feature) {
if (*(feature->mName) == mediaFeatureAtom) {
break;
}
}
if (!feature->mName ||
(expr->mRange != nsMediaExpression::eEqual &&
feature->mRangeType != nsMediaFeature::eMinMaxAllowed)) {
REPORT_UNEXPECTED_TOKEN(PEMQExpectedFeatureName);
SkipUntil(')');
return false;
}
expr->mFeature = feature;
if (!GetToken(true) || mToken.IsSymbol(')')) {
// Query expressions for any feature can be given without a value.
// However, min/max prefixes are not allowed.
if (expr->mRange != nsMediaExpression::eEqual) {
REPORT_UNEXPECTED(PEMQNoMinMaxWithoutValue);
return false;
}
expr->mValue.Reset();
return true;
}
if (!mToken.IsSymbol(':')) {
REPORT_UNEXPECTED_TOKEN(PEMQExpectedFeatureNameEnd);
UngetToken();
SkipUntil(')');
return false;
}
bool rv;
switch (feature->mValueType) {
case nsMediaFeature::eLength:
rv = ParseNonNegativeVariant(expr->mValue, VARIANT_LENGTH, nullptr);
break;
case nsMediaFeature::eInteger:
case nsMediaFeature::eBoolInteger:
rv = ParseNonNegativeVariant(expr->mValue, VARIANT_INTEGER, nullptr);
// Enforce extra restrictions for eBoolInteger
if (rv &&
feature->mValueType == nsMediaFeature::eBoolInteger &&
expr->mValue.GetIntValue() > 1)
rv = false;
break;
case nsMediaFeature::eFloat:
rv = ParseNonNegativeVariant(expr->mValue, VARIANT_NUMBER, nullptr);
break;
case nsMediaFeature::eIntRatio:
{
// Two integers separated by '/', with optional whitespace on
// either side of the '/'.
nsRefPtr<nsCSSValue::Array> a = nsCSSValue::Array::Create(2);
expr->mValue.SetArrayValue(a, eCSSUnit_Array);
// We don't bother with ParseNonNegativeVariant since we have to
// check for != 0 as well; no need to worry about the UngetToken
// since we're throwing out up to the next ')' anyway.
rv = ParseVariant(a->Item(0), VARIANT_INTEGER, nullptr) &&
a->Item(0).GetIntValue() > 0 &&
ExpectSymbol('/', true) &&
ParseVariant(a->Item(1), VARIANT_INTEGER, nullptr) &&
a->Item(1).GetIntValue() > 0;
}
break;
case nsMediaFeature::eResolution:
rv = GetToken(true);
if (!rv)
break;
rv = mToken.mType == eCSSToken_Dimension && mToken.mNumber > 0.0f;
if (!rv) {
UngetToken();
break;
}
// No worries about whether unitless zero is allowed, since the
// value must be positive (and we checked that above).
NS_ASSERTION(!mToken.mIdent.IsEmpty(), "unit lied");
if (mToken.mIdent.LowerCaseEqualsLiteral("dpi")) {
expr->mValue.SetFloatValue(mToken.mNumber, eCSSUnit_Inch);
} else if (mToken.mIdent.LowerCaseEqualsLiteral("dppx")) {
expr->mValue.SetFloatValue(mToken.mNumber, eCSSUnit_Pixel);
} else if (mToken.mIdent.LowerCaseEqualsLiteral("dpcm")) {
expr->mValue.SetFloatValue(mToken.mNumber, eCSSUnit_Centimeter);
} else {
rv = false;
}
break;
case nsMediaFeature::eEnumerated:
rv = ParseVariant(expr->mValue, VARIANT_KEYWORD,
feature->mData.mKeywordTable);
break;
case nsMediaFeature::eIdent:
rv = ParseVariant(expr->mValue, VARIANT_IDENTIFIER, nullptr);
break;
}
if (!rv || !ExpectSymbol(')', true)) {
REPORT_UNEXPECTED(PEMQExpectedFeatureValue);
SkipUntil(')');
return false;
}
return true;
}
// Parse a CSS2 import rule: "@import STRING | URL [medium [, medium]]"
bool
CSSParserImpl::ParseImportRule(RuleAppendFunc aAppendFunc, void* aData)
{
nsRefPtr<nsMediaList> media = new nsMediaList();
nsAutoString url;
if (!ParseURLOrString(url)) {
REPORT_UNEXPECTED_TOKEN(PEImportNotURI);
return false;
}
if (!ExpectSymbol(';', true)) {
if (!GatherMedia(media, true) ||
!ExpectSymbol(';', true)) {
REPORT_UNEXPECTED_TOKEN(PEImportUnexpected);
// don't advance section, simply ignore invalid @import
return false;
}
// Safe to assert this, since we ensured that there is something
// other than the ';' coming after the @import's url() token.
NS_ASSERTION(media->Count() != 0, "media list must be nonempty");
}
ProcessImport(url, media, aAppendFunc, aData);
return true;
}
void
CSSParserImpl::ProcessImport(const nsString& aURLSpec,
nsMediaList* aMedia,
RuleAppendFunc aAppendFunc,
void* aData)
{
nsRefPtr<css::ImportRule> rule = new css::ImportRule(aMedia, aURLSpec);
(*aAppendFunc)(rule, aData);
// Diagnose bad URIs even if we don't have a child loader.
nsCOMPtr<nsIURI> url;
// Charset will be deduced from mBaseURI, which is more or less correct.
nsresult rv = NS_NewURI(getter_AddRefs(url), aURLSpec, nullptr, mBaseURI);
if (NS_FAILED(rv)) {
if (rv == NS_ERROR_MALFORMED_URI) {
// import url is bad
REPORT_UNEXPECTED_P(PEImportBadURI, aURLSpec);
OUTPUT_ERROR();
}
return;
}
if (mChildLoader) {
mChildLoader->LoadChildSheet(mSheet, url, aMedia, rule);
}
}
// Parse the {} part of an @media or @-moz-document rule.
bool
CSSParserImpl::ParseGroupRule(css::GroupRule* aRule,
RuleAppendFunc aAppendFunc,
void* aData)
{
// XXXbz this could use better error reporting throughout the method
if (!ExpectSymbol('{', true)) {
return false;
}
// push rule on stack, loop over children
PushGroup(aRule);
nsCSSSection holdSection = mSection;
mSection = eCSSSection_General;
for (;;) {
// Get next non-whitespace token
if (! GetToken(true)) {
REPORT_UNEXPECTED_EOF(PEGroupRuleEOF2);
break;
}
if (mToken.IsSymbol('}')) { // done!
UngetToken();
break;
}
if (eCSSToken_AtKeyword == mToken.mType) {
// Parse for nested rules
ParseAtRule(aAppendFunc, aData, true);
continue;
}
UngetToken();
ParseRuleSet(AppendRuleToSheet, this, true);
}
PopGroup();
if (!ExpectSymbol('}', true)) {
mSection = holdSection;
return false;
}
(*aAppendFunc)(aRule, aData);
return true;
}
// Parse a CSS2 media rule: "@media medium [, medium] { ... }"
bool
CSSParserImpl::ParseMediaRule(RuleAppendFunc aAppendFunc, void* aData)
{
nsRefPtr<nsMediaList> media = new nsMediaList();
if (GatherMedia(media, true)) {
// XXXbz this could use better error reporting throughout the method
nsRefPtr<css::MediaRule> rule = new css::MediaRule();
// Append first, so when we do SetMedia() the rule
// knows what its stylesheet is.
if (ParseGroupRule(rule, aAppendFunc, aData)) {
rule->SetMedia(media);
return true;
}
}
return false;
}
// Parse a @-moz-document rule. This is like an @media rule, but instead
// of a medium it has a nonempty list of items where each item is either
// url(), url-prefix(), or domain().
bool
CSSParserImpl::ParseMozDocumentRule(RuleAppendFunc aAppendFunc, void* aData)
{
css::DocumentRule::URL *urls = nullptr;
css::DocumentRule::URL **next = &urls;
do {
if (!GetToken(true)) {
REPORT_UNEXPECTED_EOF(PEMozDocRuleEOF);
delete urls;
return false;
}
if (!(eCSSToken_URL == mToken.mType ||
(eCSSToken_Function == mToken.mType &&
(mToken.mIdent.LowerCaseEqualsLiteral("url-prefix") ||
mToken.mIdent.LowerCaseEqualsLiteral("domain") ||
mToken.mIdent.LowerCaseEqualsLiteral("regexp"))))) {
REPORT_UNEXPECTED_TOKEN(PEMozDocRuleBadFunc);
UngetToken();
delete urls;
return false;
}
css::DocumentRule::URL *cur = *next = new css::DocumentRule::URL;
next = &cur->next;
if (mToken.mType == eCSSToken_URL) {
cur->func = css::DocumentRule::eURL;
CopyUTF16toUTF8(mToken.mIdent, cur->url);
} else if (mToken.mIdent.LowerCaseEqualsLiteral("regexp")) {
// regexp() is different from url-prefix() and domain() (but
// probably the way they *should* have been* in that it requires a
// string argument, and doesn't try to behave like url().
cur->func = css::DocumentRule::eRegExp;
GetToken(true);
// copy before we know it's valid (but before ExpectSymbol changes
// mToken.mIdent)
CopyUTF16toUTF8(mToken.mIdent, cur->url);
if (eCSSToken_String != mToken.mType || !ExpectSymbol(')', true)) {
REPORT_UNEXPECTED_TOKEN(PEMozDocRuleNotString);
SkipUntil(')');
delete urls;
return false;
}
} else {
if (mToken.mIdent.LowerCaseEqualsLiteral("url-prefix")) {
cur->func = css::DocumentRule::eURLPrefix;
} else if (mToken.mIdent.LowerCaseEqualsLiteral("domain")) {
cur->func = css::DocumentRule::eDomain;
}
NS_ASSERTION(!mHavePushBack, "mustn't have pushback at this point");
if (!mScanner->NextURL(mToken) || mToken.mType != eCSSToken_URL) {
REPORT_UNEXPECTED_TOKEN(PEMozDocRuleNotURI);
SkipUntil(')');
delete urls;
return false;
}
// We could try to make the URL (as long as it's not domain())
// canonical and absolute with NS_NewURI and GetSpec, but I'm
// inclined to think we shouldn't.
CopyUTF16toUTF8(mToken.mIdent, cur->url);
}
} while (ExpectSymbol(',', true));
nsRefPtr<css::DocumentRule> rule = new css::DocumentRule();
rule->SetURLs(urls);
return ParseGroupRule(rule, aAppendFunc, aData);
}
// Parse a CSS3 namespace rule: "@namespace [prefix] STRING | URL;"
bool
CSSParserImpl::ParseNameSpaceRule(RuleAppendFunc aAppendFunc, void* aData)
{
if (!GetToken(true)) {
REPORT_UNEXPECTED_EOF(PEAtNSPrefixEOF);
return false;
}
nsAutoString prefix;
nsAutoString url;
if (eCSSToken_Ident == mToken.mType) {
prefix = mToken.mIdent;
// user-specified identifiers are case-sensitive (bug 416106)
} else {
UngetToken();
}
if (!ParseURLOrString(url) || !ExpectSymbol(';', true)) {
if (mHavePushBack) {
REPORT_UNEXPECTED_TOKEN(PEAtNSUnexpected);
} else {
REPORT_UNEXPECTED_EOF(PEAtNSURIEOF);
}
return false;
}
ProcessNameSpace(prefix, url, aAppendFunc, aData);
return true;
}
void
CSSParserImpl::ProcessNameSpace(const nsString& aPrefix,
const nsString& aURLSpec,
RuleAppendFunc aAppendFunc,
void* aData)
{
nsCOMPtr<nsIAtom> prefix;
if (!aPrefix.IsEmpty()) {
prefix = do_GetAtom(aPrefix);
if (!prefix) {
NS_RUNTIMEABORT("do_GetAtom failed - out of memory?");
}
}
nsRefPtr<css::NameSpaceRule> rule = new css::NameSpaceRule(prefix, aURLSpec);
(*aAppendFunc)(rule, aData);
// If this was the first namespace rule encountered, it will trigger
// creation of a namespace map.
if (!mNameSpaceMap) {
mNameSpaceMap = mSheet->GetNameSpaceMap();
}
}
// font-face-rule: '@font-face' '{' font-description '}'
// font-description: font-descriptor+
bool
CSSParserImpl::ParseFontFaceRule(RuleAppendFunc aAppendFunc, void* aData)
{
if (!ExpectSymbol('{', true)) {
REPORT_UNEXPECTED_TOKEN(PEBadFontBlockStart);
return false;
}
nsRefPtr<nsCSSFontFaceRule> rule(new nsCSSFontFaceRule());
for (;;) {
if (!GetToken(true)) {
REPORT_UNEXPECTED_EOF(PEFontFaceEOF);
break;
}
if (mToken.IsSymbol('}')) { // done!
UngetToken();
break;
}
// ignore extra semicolons
if (mToken.IsSymbol(';'))
continue;
if (!ParseFontDescriptor(rule)) {
REPORT_UNEXPECTED(PEDeclSkipped);
OUTPUT_ERROR();
if (!SkipDeclaration(true))
break;
}
}
if (!ExpectSymbol('}', true)) {
REPORT_UNEXPECTED_TOKEN(PEBadFontBlockEnd);
return false;
}
(*aAppendFunc)(rule, aData);
return true;
}
// font-descriptor: font-family-desc
// | font-style-desc
// | font-weight-desc
// | font-stretch-desc
// | font-src-desc
// | unicode-range-desc
//
// All font-*-desc productions follow the pattern
// IDENT ':' value ';'
//
// On entry to this function, mToken is the IDENT.
bool
CSSParserImpl::ParseFontDescriptor(nsCSSFontFaceRule* aRule)
{
if (eCSSToken_Ident != mToken.mType) {
REPORT_UNEXPECTED_TOKEN(PEFontDescExpected);
return false;
}
nsString descName = mToken.mIdent;
if (!ExpectSymbol(':', true)) {
REPORT_UNEXPECTED_TOKEN(PEParseDeclarationNoColon);
OUTPUT_ERROR();
return false;
}
nsCSSFontDesc descID = nsCSSProps::LookupFontDesc(descName);
nsCSSValue value;
if (descID == eCSSFontDesc_UNKNOWN) {
if (NonMozillaVendorIdentifier(descName)) {
// silently skip other vendors' extensions
SkipDeclaration(true);
return true;
} else {
REPORT_UNEXPECTED_P(PEUnknownFontDesc, descName);
return false;
}
}
if (!ParseFontDescriptorValue(descID, value)) {
REPORT_UNEXPECTED_P(PEValueParsingError, descName);
return false;
}
if (!ExpectEndProperty())
return false;
aRule->SetDesc(descID, value);
return true;
}
// @font-feature-values <font-family># {
// @<feature-type> {
// <feature-ident> : <feature-index>+;
// <feature-ident> : <feature-index>+;
// ...
// }
// ...
// }
bool
CSSParserImpl::ParseFontFeatureValuesRule(RuleAppendFunc aAppendFunc,
void* aData)
{
nsRefPtr<nsCSSFontFeatureValuesRule>
valuesRule(new nsCSSFontFeatureValuesRule());
// parse family list
nsCSSValue familyValue;
if (!ParseFamily(familyValue) ||
familyValue.GetUnit() != eCSSUnit_Families)
{
REPORT_UNEXPECTED_TOKEN(PEFFVNoFamily);
return false;
}
// add family to rule
nsAutoString familyList;
bool hasGeneric;
familyValue.GetStringValue(familyList);
valuesRule->SetFamilyList(familyList, hasGeneric);
// family list has generic ==> parse error
if (hasGeneric) {
REPORT_UNEXPECTED_TOKEN(PEFFVGenericInFamilyList);
return false;
}
// open brace
if (!ExpectSymbol('{', true)) {
REPORT_UNEXPECTED_TOKEN(PEFFVBlockStart);
return false;
}
// list of sets of feature values, each set bound to a specific
// feature-type (e.g. swash, annotation)
for (;;) {
if (!GetToken(true)) {
REPORT_UNEXPECTED_EOF(PEFFVUnexpectedEOF);
break;
}
if (mToken.IsSymbol('}')) { // done!
UngetToken();
break;
}
if (!ParseFontFeatureValueSet(valuesRule)) {
if (!SkipAtRule(false)) {
break;
}
}
}
if (!ExpectSymbol('}', true)) {
REPORT_UNEXPECTED_TOKEN(PEFFVUnexpectedBlockEnd);
SkipUntil('}');
return false;
}
(*aAppendFunc)(valuesRule, aData);
return true;
}
#define NUMVALUES_NO_LIMIT 0xFFFF
// parse a single value set containing name-value pairs for a single feature type
// @<feature-type> { [ <feature-ident> : <feature-index>+ ; ]* }
// Ex: @swash { flowing: 1; delicate: 2; }
bool
CSSParserImpl::ParseFontFeatureValueSet(nsCSSFontFeatureValuesRule
*aFeatureValuesRule)
{
// -- @keyword (e.g. swash, styleset)
if (eCSSToken_AtKeyword != mToken.mType) {
REPORT_UNEXPECTED_TOKEN(PEFontFeatureValuesNoAt);
OUTPUT_ERROR();
UngetToken();
return false;
}
// which font-specific variant of font-variant-alternates
int32_t whichVariant;
nsCSSKeyword keyword = nsCSSKeywords::LookupKeyword(mToken.mIdent);
if (keyword == eCSSKeyword_UNKNOWN ||
!nsCSSProps::FindKeyword(keyword,
nsCSSProps::kFontVariantAlternatesFuncsKTable,
whichVariant))
{
if (!NonMozillaVendorIdentifier(mToken.mIdent)) {
REPORT_UNEXPECTED_TOKEN(PEFFVUnknownFontVariantPropValue);
OUTPUT_ERROR();
}
UngetToken();
return false;
}
nsAutoString featureType(mToken.mIdent);
// open brace
if (!ExpectSymbol('{', true)) {
REPORT_UNEXPECTED_TOKEN(PEFFVValueSetStart);
return false;
}
// styleset and character-variant can be multi-valued, otherwise single value
int32_t limitNumValues;
switch (keyword) {
case eCSSKeyword_styleset:
limitNumValues = NUMVALUES_NO_LIMIT;
break;
case eCSSKeyword_character_variant:
limitNumValues = 2;
break;
default:
limitNumValues = 1;
break;
}
// -- ident integer+ [, ident integer+]
nsAutoTArray<gfxFontFeatureValueSet::ValueList, 5> values;
// list of font-feature-values-declaration's
for (;;) {
nsAutoString valueId;
if (!GetToken(true)) {
REPORT_UNEXPECTED_EOF(PEFFVUnexpectedEOF);
break;
}
// ignore extra semicolons
if (mToken.IsSymbol(';')) {
continue;
}
// close brace ==> done
if (mToken.IsSymbol('}')) {
break;
}
// ident
if (eCSSToken_Ident != mToken.mType) {
REPORT_UNEXPECTED_TOKEN(PEFFVExpectedIdent);
if (!SkipDeclaration(true)) {
break;
}
continue;
}
valueId.Assign(mToken.mIdent);
// colon
if (!ExpectSymbol(':', true)) {
REPORT_UNEXPECTED_TOKEN(PEParseDeclarationNoColon);
OUTPUT_ERROR();
if (!SkipDeclaration(true)) {
break;
}
continue;
}
// value list
nsAutoTArray<uint32_t,4> featureSelectors;
nsCSSValue intValue;
while (ParseNonNegativeVariant(intValue, VARIANT_INTEGER, nullptr)) {
featureSelectors.AppendElement(uint32_t(intValue.GetIntValue()));
}
int32_t numValues = featureSelectors.Length();
if (numValues == 0) {
REPORT_UNEXPECTED_TOKEN(PEFFVExpectedValue);
OUTPUT_ERROR();
if (!SkipDeclaration(true)) {
break;
}
continue;
}
if (numValues > limitNumValues) {
REPORT_UNEXPECTED_P(PEFFVTooManyValues, featureType);
OUTPUT_ERROR();
if (!SkipDeclaration(true)) {
break;
}
continue;
}
if (!GetToken(true)) {
REPORT_UNEXPECTED_EOF(PEFFVUnexpectedEOF);
gfxFontFeatureValueSet::ValueList v(valueId, featureSelectors);
values.AppendElement(v);
break;
}
// ';' or '}' to end definition
if (!mToken.IsSymbol(';') && !mToken.IsSymbol('}')) {
REPORT_UNEXPECTED_TOKEN(PEFFVValueDefinitionTrailing);
OUTPUT_ERROR();
if (!SkipDeclaration(true)) {
break;
}
continue;
}
gfxFontFeatureValueSet::ValueList v(valueId, featureSelectors);
values.AppendElement(v);
if (mToken.IsSymbol('}')) {
break;
}
}
aFeatureValuesRule->AddValueList(whichVariant, values);
return true;
}
bool
CSSParserImpl::ParseKeyframesRule(RuleAppendFunc aAppendFunc, void* aData)
{
if (!GetToken(true)) {
REPORT_UNEXPECTED_EOF(PEKeyframeNameEOF);
return false;
}
if (mToken.mType != eCSSToken_Ident) {
REPORT_UNEXPECTED_TOKEN(PEKeyframeBadName);
UngetToken();
return false;
}
nsString name(mToken.mIdent);
if (!ExpectSymbol('{', true)) {
REPORT_UNEXPECTED_TOKEN(PEKeyframeBrace);
return false;
}
nsRefPtr<nsCSSKeyframesRule> rule = new nsCSSKeyframesRule(name);
while (!ExpectSymbol('}', true)) {
nsRefPtr<nsCSSKeyframeRule> kid = ParseKeyframeRule();
if (kid) {
rule->AppendStyleRule(kid);
} else {
OUTPUT_ERROR();
SkipRuleSet(true);
}
}
(*aAppendFunc)(rule, aData);
return true;
}
bool
CSSParserImpl::ParsePageRule(RuleAppendFunc aAppendFunc, void* aData)
{
// TODO: There can be page selectors after @page such as ":first", ":left".
uint32_t parseFlags = eParseDeclaration_InBraces |
eParseDeclaration_AllowImportant;
// Forbid viewport units in @page rules. See bug 811391.
NS_ABORT_IF_FALSE(mViewportUnitsEnabled,
"Viewport units should be enabled outside of @page rules.");
mViewportUnitsEnabled = false;
nsAutoPtr<css::Declaration> declaration(
ParseDeclarationBlock(parseFlags,
eCSSContext_Page));
mViewportUnitsEnabled = true;
if (!declaration) {
return false;
}
// Takes ownership of declaration.
nsRefPtr<nsCSSPageRule> rule = new nsCSSPageRule(declaration);
(*aAppendFunc)(rule, aData);
return true;
}
already_AddRefed<nsCSSKeyframeRule>
CSSParserImpl::ParseKeyframeRule()
{
InfallibleTArray<float> selectorList;
if (!ParseKeyframeSelectorList(selectorList)) {
REPORT_UNEXPECTED(PEBadSelectorKeyframeRuleIgnored);
return nullptr;
}
// Ignore !important in keyframe rules
uint32_t parseFlags = eParseDeclaration_InBraces;
nsAutoPtr<css::Declaration> declaration(ParseDeclarationBlock(parseFlags));
if (!declaration) {
return nullptr;
}
// Takes ownership of declaration, and steals contents of selectorList.
nsRefPtr<nsCSSKeyframeRule> rule =
new nsCSSKeyframeRule(selectorList, declaration);
return rule.forget();
}
bool
CSSParserImpl::ParseKeyframeSelectorList(InfallibleTArray<float>& aSelectorList)
{
for (;;) {
if (!GetToken(true)) {
// The first time through the loop, this means we got an empty
// list. Otherwise, it means we have a trailing comma.
return false;
}
float value;
switch (mToken.mType) {
case eCSSToken_Percentage:
value = mToken.mNumber;
break;
case eCSSToken_Ident:
if (mToken.mIdent.LowerCaseEqualsLiteral("from")) {
value = 0.0f;
break;
}
if (mToken.mIdent.LowerCaseEqualsLiteral("to")) {
value = 1.0f;
break;
}
// fall through
default:
UngetToken();
// The first time through the loop, this means we got an empty
// list. Otherwise, it means we have a trailing comma.
return false;
}
aSelectorList.AppendElement(value);
if (!ExpectSymbol(',', true)) {
return true;
}
}
}
// supports_rule
// : "@supports" supports_condition group_rule_body
// ;
bool
CSSParserImpl::ParseSupportsRule(RuleAppendFunc aAppendFunc, void* aProcessData)
{
bool conditionMet = false;
nsString condition;
mScanner->StartRecording();
bool parsed = ParseSupportsCondition(conditionMet);
if (!parsed) {
mScanner->StopRecording();
return false;
}
if (!ExpectSymbol('{', true)) {
REPORT_UNEXPECTED_TOKEN(PESupportsGroupRuleStart);
mScanner->StopRecording();
return false;
}
UngetToken();
mScanner->StopRecording(condition);
// Remove the "{" that would follow the condition.
if (condition.Length() != 0) {
condition.Truncate(condition.Length() - 1);
}
// Remove spaces from the start and end of the recorded supports condition.
condition.Trim(" ", true, true, false);
// Record whether we are in a failing @supports, so that property parse
// errors don't get reported.
nsAutoFailingSupportsRule failing(this, conditionMet);
nsRefPtr<css::GroupRule> rule = new CSSSupportsRule(conditionMet, condition);
return ParseGroupRule(rule, aAppendFunc, aProcessData);
}
// supports_condition
// : supports_condition_in_parens supports_condition_terms
// | supports_condition_negation
// ;
bool
CSSParserImpl::ParseSupportsCondition(bool& aConditionMet)
{
if (!GetToken(true)) {
REPORT_UNEXPECTED_EOF(PESupportsConditionStartEOF2);
return false;
}
UngetToken();
if (mToken.IsSymbol('(') ||
mToken.mType == eCSSToken_Function ||
mToken.mType == eCSSToken_URL ||
mToken.mType == eCSSToken_Bad_URL) {
return ParseSupportsConditionInParens(aConditionMet) &&
ParseSupportsConditionTerms(aConditionMet);
}
if (mToken.mType == eCSSToken_Ident &&
mToken.mIdent.LowerCaseEqualsLiteral("not")) {
return ParseSupportsConditionNegation(aConditionMet);
}
REPORT_UNEXPECTED_TOKEN(PESupportsConditionExpectedStart);
return false;
}
// supports_condition_negation
// : 'not' S+ supports_condition_in_parens
// ;
bool
CSSParserImpl::ParseSupportsConditionNegation(bool& aConditionMet)
{
if (!GetToken(true)) {
REPORT_UNEXPECTED_EOF(PESupportsConditionNotEOF);
return false;
}
if (mToken.mType != eCSSToken_Ident ||
!mToken.mIdent.LowerCaseEqualsLiteral("not")) {
REPORT_UNEXPECTED_TOKEN(PESupportsConditionExpectedNot);
return false;
}
if (!RequireWhitespace()) {
REPORT_UNEXPECTED(PESupportsWhitespaceRequired);
return false;
}
if (ParseSupportsConditionInParens(aConditionMet)) {
aConditionMet = !aConditionMet;
return true;
}
return false;
}
// supports_condition_in_parens
// : '(' S* supports_condition_in_parens_inside_parens ')' S*
// | general_enclosed
// ;
bool
CSSParserImpl::ParseSupportsConditionInParens(bool& aConditionMet)
{
if (!GetToken(true)) {
REPORT_UNEXPECTED_EOF(PESupportsConditionInParensStartEOF);
return false;
}
if (mToken.mType == eCSSToken_URL) {
aConditionMet = false;
return true;
}
if (mToken.mType == eCSSToken_Function ||
mToken.mType == eCSSToken_Bad_URL) {
if (!SkipUntil(')')) {
REPORT_UNEXPECTED_EOF(PESupportsConditionInParensEOF);
return false;
}
aConditionMet = false;
return true;
}
if (!mToken.IsSymbol('(')) {
REPORT_UNEXPECTED_TOKEN(PESupportsConditionExpectedOpenParenOrFunction);
UngetToken();
return false;
}
if (!ParseSupportsConditionInParensInsideParens(aConditionMet)) {
if (!SkipUntil(')')) {
REPORT_UNEXPECTED_EOF(PESupportsConditionInParensEOF);
return false;
}
aConditionMet = false;
return true;
}
if (!(ExpectSymbol(')', true))) {
REPORT_UNEXPECTED_TOKEN(PESupportsConditionExpectedCloseParen);
SkipUntil(')');
return false;
}
return true;
}
// supports_condition_in_parens_inside_parens
// : core_declaration
// | supports_condition_negation
// | supports_condition_in_parens supports_condition_terms
// ;
bool
CSSParserImpl::ParseSupportsConditionInParensInsideParens(bool& aConditionMet)
{
if (!GetToken(true)) {
return false;
}
if (mToken.mType == eCSSToken_Ident) {
if (!mToken.mIdent.LowerCaseEqualsLiteral("not")) {
nsAutoString propertyName = mToken.mIdent;
if (!ExpectSymbol(':', true)) {
return false;
}
if (ExpectSymbol(')', true)) {
UngetToken();
return false;
}
nsCSSProperty propID = nsCSSProps::LookupProperty(propertyName,
nsCSSProps::eEnabled);
if (propID == eCSSProperty_UNKNOWN) {
aConditionMet = false;
SkipUntil(')');
UngetToken();
} else {
aConditionMet = ParseProperty(propID) &&
ParsePriority() != ePriority_Error;
if (!aConditionMet) {
SkipUntil(')');
UngetToken();
}
mTempData.ClearProperty(propID);
mTempData.AssertInitialState();
}
return true;
}
UngetToken();
return ParseSupportsConditionNegation(aConditionMet);
}
UngetToken();
return ParseSupportsConditionInParens(aConditionMet) &&
ParseSupportsConditionTerms(aConditionMet);
}
// supports_condition_terms
// : S+ 'and' supports_condition_terms_after_operator('and')
// | S+ 'or' supports_condition_terms_after_operator('or')
// |
// ;
bool
CSSParserImpl::ParseSupportsConditionTerms(bool& aConditionMet)
{
if (!RequireWhitespace() || !GetToken(false)) {
return true;
}
if (mToken.mType != eCSSToken_Ident) {
UngetToken();
return true;
}
if (mToken.mIdent.LowerCaseEqualsLiteral("and")) {
return ParseSupportsConditionTermsAfterOperator(aConditionMet, eAnd);
}
if (mToken.mIdent.LowerCaseEqualsLiteral("or")) {
return ParseSupportsConditionTermsAfterOperator(aConditionMet, eOr);
}
UngetToken();
return true;
}
// supports_condition_terms_after_operator(operator)
// : S+ supports_condition_in_parens ( <operator> supports_condition_in_parens )*
// ;
bool
CSSParserImpl::ParseSupportsConditionTermsAfterOperator(
bool& aConditionMet,
CSSParserImpl::SupportsConditionTermOperator aOperator)
{
if (!RequireWhitespace()) {
REPORT_UNEXPECTED(PESupportsWhitespaceRequired);
return false;
}
const char* token = aOperator == eAnd ? "and" : "or";
for (;;) {
bool termConditionMet = false;
if (!ParseSupportsConditionInParens(termConditionMet)) {
return false;
}
aConditionMet = aOperator == eAnd ? aConditionMet && termConditionMet :
aConditionMet || termConditionMet;
if (!GetToken(true)) {
return true;
}
if (mToken.mType != eCSSToken_Ident ||
!mToken.mIdent.LowerCaseEqualsASCII(token)) {
UngetToken();
return true;
}
}
}
bool
CSSParserImpl::SkipUntil(PRUnichar aStopSymbol)
{
nsCSSToken* tk = &mToken;
nsAutoTArray<PRUnichar, 16> stack;
stack.AppendElement(aStopSymbol);
for (;;) {
if (!GetToken(true)) {
return false;
}
if (eCSSToken_Symbol == tk->mType) {
PRUnichar symbol = tk->mSymbol;
uint32_t stackTopIndex = stack.Length() - 1;
if (symbol == stack.ElementAt(stackTopIndex)) {
stack.RemoveElementAt(stackTopIndex);
if (stackTopIndex == 0) {
return true;
}
// Just handle out-of-memory by parsing incorrectly. It's
// highly unlikely we're dealing with a legitimate style sheet
// anyway.
} else if ('{' == symbol) {
stack.AppendElement('}');
} else if ('[' == symbol) {
stack.AppendElement(']');
} else if ('(' == symbol) {
stack.AppendElement(')');
}
} else if (eCSSToken_Function == tk->mType ||
eCSSToken_Bad_URL == tk->mType) {
stack.AppendElement(')');
}
}
}
void
CSSParserImpl::SkipUntilOneOf(const PRUnichar* aStopSymbolChars)
{
nsCSSToken* tk = &mToken;
nsDependentString stopSymbolChars(aStopSymbolChars);
for (;;) {
if (!GetToken(true)) {
break;
}
if (eCSSToken_Symbol == tk->mType) {
PRUnichar symbol = tk->mSymbol;
if (stopSymbolChars.FindChar(symbol) != -1) {
break;
} else if ('{' == symbol) {
SkipUntil('}');
} else if ('[' == symbol) {
SkipUntil(']');
} else if ('(' == symbol) {
SkipUntil(')');
}
} else if (eCSSToken_Function == tk->mType ||
eCSSToken_Bad_URL == tk->mType) {
SkipUntil(')');
}
}
}
bool
CSSParserImpl::SkipDeclaration(bool aCheckForBraces)
{
nsCSSToken* tk = &mToken;
for (;;) {
if (!GetToken(true)) {
if (aCheckForBraces) {
REPORT_UNEXPECTED_EOF(PESkipDeclBraceEOF);
}
return false;
}
if (eCSSToken_Symbol == tk->mType) {
PRUnichar symbol = tk->mSymbol;
if (';' == symbol) {
break;
}
if (aCheckForBraces) {
if ('}' == symbol) {
UngetToken();
break;
}
}
if ('{' == symbol) {
SkipUntil('}');
} else if ('(' == symbol) {
SkipUntil(')');
} else if ('[' == symbol) {
SkipUntil(']');
}
} else if (eCSSToken_Function == tk->mType ||
eCSSToken_Bad_URL == tk->mType) {
SkipUntil(')');
}
}
return true;
}
void
CSSParserImpl::SkipRuleSet(bool aInsideBraces)
{
nsCSSToken* tk = &mToken;
for (;;) {
if (!GetToken(true)) {
REPORT_UNEXPECTED_EOF(PESkipRSBraceEOF);
break;
}
if (eCSSToken_Symbol == tk->mType) {
PRUnichar symbol = tk->mSymbol;
if ('}' == symbol && aInsideBraces) {
// leave block closer for higher-level grammar to consume
UngetToken();
break;
} else if ('{' == symbol) {
SkipUntil('}');
break;
} else if ('(' == symbol) {
SkipUntil(')');
} else if ('[' == symbol) {
SkipUntil(']');
}
} else if (eCSSToken_Function == tk->mType ||
eCSSToken_Bad_URL == tk->mType) {
SkipUntil(')');
}
}
}
void
CSSParserImpl::PushGroup(css::GroupRule* aRule)
{
mGroupStack.AppendElement(aRule);
}
void
CSSParserImpl::PopGroup()
{
uint32_t count = mGroupStack.Length();
if (0 < count) {
mGroupStack.RemoveElementAt(count - 1);
}
}
void
CSSParserImpl::AppendRule(css::Rule* aRule)
{
uint32_t count = mGroupStack.Length();
if (0 < count) {
mGroupStack[count - 1]->AppendStyleRule(aRule);
}
else {
mSheet->AppendStyleRule(aRule);
}
}
bool
CSSParserImpl::ParseRuleSet(RuleAppendFunc aAppendFunc, void* aData,
bool aInsideBraces)
{
// First get the list of selectors for the rule
nsCSSSelectorList* slist = nullptr;
uint32_t linenum, colnum;
if (!GetNextTokenLocation(true, &linenum, &colnum) ||
!ParseSelectorList(slist, PRUnichar('{'))) {
REPORT_UNEXPECTED(PEBadSelectorRSIgnored);
OUTPUT_ERROR();
SkipRuleSet(aInsideBraces);
return false;
}
NS_ASSERTION(nullptr != slist, "null selector list");
CLEAR_ERROR();
// Next parse the declaration block
uint32_t parseFlags = eParseDeclaration_InBraces |
eParseDeclaration_AllowImportant;
css::Declaration* declaration = ParseDeclarationBlock(parseFlags);
if (nullptr == declaration) {
delete slist;
return false;
}
#if 0
slist->Dump();
fputs("{\n", stdout);
declaration->List();
fputs("}\n", stdout);
#endif
// Translate the selector list and declaration block into style data
nsRefPtr<css::StyleRule> rule = new css::StyleRule(slist, declaration);
rule->SetLineNumberAndColumnNumber(linenum, colnum);
(*aAppendFunc)(rule, aData);
return true;
}
bool
CSSParserImpl::ParseSelectorList(nsCSSSelectorList*& aListHead,
PRUnichar aStopChar)
{
nsCSSSelectorList* list = nullptr;
if (! ParseSelectorGroup(list)) {
// must have at least one selector group
aListHead = nullptr;
return false;
}
NS_ASSERTION(nullptr != list, "no selector list");
aListHead = list;
// After that there must either be a "," or a "{" (the latter if
// StopChar is nonzero)
nsCSSToken* tk = &mToken;
for (;;) {
if (! GetToken(true)) {
if (aStopChar == PRUnichar(0)) {
return true;
}
REPORT_UNEXPECTED_EOF(PESelectorListExtraEOF);
break;
}
if (eCSSToken_Symbol == tk->mType) {
if (',' == tk->mSymbol) {
nsCSSSelectorList* newList = nullptr;
// Another selector group must follow
if (! ParseSelectorGroup(newList)) {
break;
}
// add new list to the end of the selector list
list->mNext = newList;
list = newList;
continue;
} else if (aStopChar == tk->mSymbol && aStopChar != PRUnichar(0)) {
UngetToken();
return true;
}
}
REPORT_UNEXPECTED_TOKEN(PESelectorListExtra);
UngetToken();
break;
}
delete aListHead;
aListHead = nullptr;
return false;
}
static bool IsUniversalSelector(const nsCSSSelector& aSelector)
{
return bool((aSelector.mNameSpace == kNameSpaceID_Unknown) &&
(aSelector.mLowercaseTag == nullptr) &&
(aSelector.mIDList == nullptr) &&
(aSelector.mClassList == nullptr) &&
(aSelector.mAttrList == nullptr) &&
(aSelector.mNegations == nullptr) &&
(aSelector.mPseudoClassList == nullptr));
}
bool
CSSParserImpl::ParseSelectorGroup(nsCSSSelectorList*& aList)
{
PRUnichar combinator = 0;
nsAutoPtr<nsCSSSelectorList> list(new nsCSSSelectorList());
for (;;) {
if (!ParseSelector(list, combinator)) {
return false;
}
// Look for a combinator.
if (!GetToken(false)) {
break; // EOF ok here
}
combinator = PRUnichar(0);
if (mToken.mType == eCSSToken_Whitespace) {
if (!GetToken(true)) {
break; // EOF ok here
}
combinator = PRUnichar(' ');
}
if (mToken.mType != eCSSToken_Symbol) {
UngetToken(); // not a combinator
} else {
PRUnichar symbol = mToken.mSymbol;
if (symbol == '+' || symbol == '>' || symbol == '~') {
combinator = mToken.mSymbol;
} else {
UngetToken(); // not a combinator
if (symbol == ',' || symbol == '{' || symbol == ')') {
break; // end of selector group
}
}
}
if (!combinator) {
REPORT_UNEXPECTED_TOKEN(PESelectorListExtra);
return false;
}
}
aList = list.forget();
return true;
}
#define SEL_MASK_NSPACE 0x01
#define SEL_MASK_ELEM 0x02
#define SEL_MASK_ID 0x04
#define SEL_MASK_CLASS 0x08
#define SEL_MASK_ATTRIB 0x10
#define SEL_MASK_PCLASS 0x20
#define SEL_MASK_PELEM 0x40
//
// Parses an ID selector #name
//
CSSParserImpl::nsSelectorParsingStatus
CSSParserImpl::ParseIDSelector(int32_t& aDataMask,
nsCSSSelector& aSelector)
{
NS_ASSERTION(!mToken.mIdent.IsEmpty(),
"Empty mIdent in eCSSToken_ID token?");
aDataMask |= SEL_MASK_ID;
aSelector.AddID(mToken.mIdent);
return eSelectorParsingStatus_Continue;
}
//
// Parses a class selector .name
//
CSSParserImpl::nsSelectorParsingStatus
CSSParserImpl::ParseClassSelector(int32_t& aDataMask,
nsCSSSelector& aSelector)
{
if (! GetToken(false)) { // get ident
REPORT_UNEXPECTED_EOF(PEClassSelEOF);
return eSelectorParsingStatus_Error;
}
if (eCSSToken_Ident != mToken.mType) { // malformed selector
REPORT_UNEXPECTED_TOKEN(PEClassSelNotIdent);
UngetToken();
return eSelectorParsingStatus_Error;
}
aDataMask |= SEL_MASK_CLASS;
aSelector.AddClass(mToken.mIdent);
return eSelectorParsingStatus_Continue;
}
//
// Parse a type element selector or a universal selector
// namespace|type or namespace|* or *|* or *
//
CSSParserImpl::nsSelectorParsingStatus
CSSParserImpl::ParseTypeOrUniversalSelector(int32_t& aDataMask,
nsCSSSelector& aSelector,
bool aIsNegated)
{
nsAutoString buffer;
if (mToken.IsSymbol('*')) { // universal element selector, or universal namespace
if (ExpectSymbol('|', false)) { // was namespace
aDataMask |= SEL_MASK_NSPACE;
aSelector.SetNameSpace(kNameSpaceID_Unknown); // namespace wildcard
if (! GetToken(false)) {
REPORT_UNEXPECTED_EOF(PETypeSelEOF);
return eSelectorParsingStatus_Error;
}
if (eCSSToken_Ident == mToken.mType) { // element name
aDataMask |= SEL_MASK_ELEM;
aSelector.SetTag(mToken.mIdent);
}
else if (mToken.IsSymbol('*')) { // universal selector
aDataMask |= SEL_MASK_ELEM;
// don't set tag
}
else {
REPORT_UNEXPECTED_TOKEN(PETypeSelNotType);
UngetToken();
return eSelectorParsingStatus_Error;
}
}
else { // was universal element selector
SetDefaultNamespaceOnSelector(aSelector);
aDataMask |= SEL_MASK_ELEM;
// don't set any tag in the selector
}
if (! GetToken(false)) { // premature eof is ok (here!)
return eSelectorParsingStatus_Done;
}
}
else if (eCSSToken_Ident == mToken.mType) { // element name or namespace name
buffer = mToken.mIdent; // hang on to ident
if (ExpectSymbol('|', false)) { // was namespace
aDataMask |= SEL_MASK_NSPACE;
int32_t nameSpaceID = GetNamespaceIdForPrefix(buffer);
if (nameSpaceID == kNameSpaceID_Unknown) {
return eSelectorParsingStatus_Error;
}
aSelector.SetNameSpace(nameSpaceID);
if (! GetToken(false)) {
REPORT_UNEXPECTED_EOF(PETypeSelEOF);
return eSelectorParsingStatus_Error;
}
if (eCSSToken_Ident == mToken.mType) { // element name
aDataMask |= SEL_MASK_ELEM;
aSelector.SetTag(mToken.mIdent);
}
else if (mToken.IsSymbol('*')) { // universal selector
aDataMask |= SEL_MASK_ELEM;
// don't set tag
}
else {
REPORT_UNEXPECTED_TOKEN(PETypeSelNotType);
UngetToken();
return eSelectorParsingStatus_Error;
}
}
else { // was element name
SetDefaultNamespaceOnSelector(aSelector);
aSelector.SetTag(buffer);
aDataMask |= SEL_MASK_ELEM;
}
if (! GetToken(false)) { // premature eof is ok (here!)
return eSelectorParsingStatus_Done;
}
}
else if (mToken.IsSymbol('|')) { // No namespace
aDataMask |= SEL_MASK_NSPACE;
aSelector.SetNameSpace(kNameSpaceID_None); // explicit NO namespace
// get mandatory tag
if (! GetToken(false)) {
REPORT_UNEXPECTED_EOF(PETypeSelEOF);
return eSelectorParsingStatus_Error;
}
if (eCSSToken_Ident == mToken.mType) { // element name
aDataMask |= SEL_MASK_ELEM;
aSelector.SetTag(mToken.mIdent);
}
else if (mToken.IsSymbol('*')) { // universal selector
aDataMask |= SEL_MASK_ELEM;
// don't set tag
}
else {
REPORT_UNEXPECTED_TOKEN(PETypeSelNotType);
UngetToken();
return eSelectorParsingStatus_Error;
}
if (! GetToken(false)) { // premature eof is ok (here!)
return eSelectorParsingStatus_Done;
}
}
else {
SetDefaultNamespaceOnSelector(aSelector);
}
if (aIsNegated) {
// restore last token read in case of a negated type selector
UngetToken();
}
return eSelectorParsingStatus_Continue;
}
//
// Parse attribute selectors [attr], [attr=value], [attr|=value],
// [attr~=value], [attr^=value], [attr$=value] and [attr*=value]
//
CSSParserImpl::nsSelectorParsingStatus
CSSParserImpl::ParseAttributeSelector(int32_t& aDataMask,
nsCSSSelector& aSelector)
{
if (! GetToken(true)) { // premature EOF
REPORT_UNEXPECTED_EOF(PEAttributeNameEOF);
return eSelectorParsingStatus_Error;
}
int32_t nameSpaceID = kNameSpaceID_None;
nsAutoString attr;
if (mToken.IsSymbol('*')) { // wildcard namespace
nameSpaceID = kNameSpaceID_Unknown;
if (ExpectSymbol('|', false)) {
if (! GetToken(false)) { // premature EOF
REPORT_UNEXPECTED_EOF(PEAttributeNameEOF);
return eSelectorParsingStatus_Error;
}
if (eCSSToken_Ident == mToken.mType) { // attr name
attr = mToken.mIdent;
}
else {
REPORT_UNEXPECTED_TOKEN(PEAttributeNameExpected);
UngetToken();
return eSelectorParsingStatus_Error;
}
}
else {
REPORT_UNEXPECTED_TOKEN(PEAttSelNoBar);
return eSelectorParsingStatus_Error;
}
}
else if (mToken.IsSymbol('|')) { // NO namespace
if (! GetToken(false)) { // premature EOF
REPORT_UNEXPECTED_EOF(PEAttributeNameEOF);
return eSelectorParsingStatus_Error;
}
if (eCSSToken_Ident == mToken.mType) { // attr name
attr = mToken.mIdent;
}
else {
REPORT_UNEXPECTED_TOKEN(PEAttributeNameExpected);
UngetToken();
return eSelectorParsingStatus_Error;
}
}
else if (eCSSToken_Ident == mToken.mType) { // attr name or namespace
attr = mToken.mIdent; // hang on to it
if (ExpectSymbol('|', false)) { // was a namespace
nameSpaceID = GetNamespaceIdForPrefix(attr);
if (nameSpaceID == kNameSpaceID_Unknown) {
return eSelectorParsingStatus_Error;
}
if (! GetToken(false)) { // premature EOF
REPORT_UNEXPECTED_EOF(PEAttributeNameEOF);
return eSelectorParsingStatus_Error;
}
if (eCSSToken_Ident == mToken.mType) { // attr name
attr = mToken.mIdent;
}
else {
REPORT_UNEXPECTED_TOKEN(PEAttributeNameExpected);
UngetToken();
return eSelectorParsingStatus_Error;
}
}
}
else { // malformed
REPORT_UNEXPECTED_TOKEN(PEAttributeNameOrNamespaceExpected);
UngetToken();
return eSelectorParsingStatus_Error;
}
if (! GetToken(true)) { // premature EOF
REPORT_UNEXPECTED_EOF(PEAttSelInnerEOF);
return eSelectorParsingStatus_Error;
}
if ((eCSSToken_Symbol == mToken.mType) ||
(eCSSToken_Includes == mToken.mType) ||
(eCSSToken_Dashmatch == mToken.mType) ||
(eCSSToken_Beginsmatch == mToken.mType) ||
(eCSSToken_Endsmatch == mToken.mType) ||
(eCSSToken_Containsmatch == mToken.mType)) {
uint8_t func;
if (eCSSToken_Includes == mToken.mType) {
func = NS_ATTR_FUNC_INCLUDES;
}
else if (eCSSToken_Dashmatch == mToken.mType) {
func = NS_ATTR_FUNC_DASHMATCH;
}
else if (eCSSToken_Beginsmatch == mToken.mType) {
func = NS_ATTR_FUNC_BEGINSMATCH;
}
else if (eCSSToken_Endsmatch == mToken.mType) {
func = NS_ATTR_FUNC_ENDSMATCH;
}
else if (eCSSToken_Containsmatch == mToken.mType) {
func = NS_ATTR_FUNC_CONTAINSMATCH;
}
else if (']' == mToken.mSymbol) {
aDataMask |= SEL_MASK_ATTRIB;
aSelector.AddAttribute(nameSpaceID, attr);
func = NS_ATTR_FUNC_SET;
}
else if ('=' == mToken.mSymbol) {
func = NS_ATTR_FUNC_EQUALS;
}
else {
REPORT_UNEXPECTED_TOKEN(PEAttSelUnexpected);
UngetToken(); // bad function
return eSelectorParsingStatus_Error;
}
if (NS_ATTR_FUNC_SET != func) { // get value
if (! GetToken(true)) { // premature EOF
REPORT_UNEXPECTED_EOF(PEAttSelValueEOF);
return eSelectorParsingStatus_Error;
}
if ((eCSSToken_Ident == mToken.mType) || (eCSSToken_String == mToken.mType)) {
nsAutoString value(mToken.mIdent);
if (! GetToken(true)) { // premature EOF
REPORT_UNEXPECTED_EOF(PEAttSelCloseEOF);
return eSelectorParsingStatus_Error;
}
if (mToken.IsSymbol(']')) {
bool isCaseSensitive = true;
// For cases when this style sheet is applied to an HTML
// element in an HTML document, and the attribute selector is
// for a non-namespaced attribute, then check to see if it's
// one of the known attributes whose VALUE is
// case-insensitive.
if (nameSpaceID == kNameSpaceID_None) {
static const char* caseInsensitiveHTMLAttribute[] = {
// list based on http://www.w3.org/TR/html4/
"lang",
"dir",
"http-equiv",
"text",
"link",
"vlink",
"alink",
"compact",
"align",
"frame",
"rules",
"valign",
"scope",
"axis",
"nowrap",
"hreflang",
"rel",
"rev",
"charset",
"codetype",
"declare",
"valuetype",
"shape",
"nohref",
"media",
"bgcolor",
"clear",
"color",
"face",
"noshade",
"noresize",
"scrolling",
"target",
"method",
"enctype",
"accept-charset",
"accept",
"checked",
"multiple",
"selected",
"disabled",
"readonly",
"language",
"defer",
"type",
// additional attributes not in HTML4
"direction", // marquee
nullptr
};
short i = 0;
const char* htmlAttr;
while ((htmlAttr = caseInsensitiveHTMLAttribute[i++])) {
if (attr.LowerCaseEqualsASCII(htmlAttr)) {
isCaseSensitive = false;
break;
}
}
}
aDataMask |= SEL_MASK_ATTRIB;
aSelector.AddAttribute(nameSpaceID, attr, func, value, isCaseSensitive);
}
else {
REPORT_UNEXPECTED_TOKEN(PEAttSelNoClose);
UngetToken();
return eSelectorParsingStatus_Error;
}
}
else {
REPORT_UNEXPECTED_TOKEN(PEAttSelBadValue);
UngetToken();
return eSelectorParsingStatus_Error;
}
}
}
else {
REPORT_UNEXPECTED_TOKEN(PEAttSelUnexpected);
UngetToken(); // bad dog, no biscut!
return eSelectorParsingStatus_Error;
}
return eSelectorParsingStatus_Continue;
}
//
// Parse pseudo-classes and pseudo-elements
//
CSSParserImpl::nsSelectorParsingStatus
CSSParserImpl::ParsePseudoSelector(int32_t& aDataMask,
nsCSSSelector& aSelector,
bool aIsNegated,
nsIAtom** aPseudoElement,
nsAtomList** aPseudoElementArgs,
nsCSSPseudoElements::Type* aPseudoElementType)
{
NS_ASSERTION(aIsNegated || (aPseudoElement && aPseudoElementArgs),
"expected location to store pseudo element");
NS_ASSERTION(!aIsNegated || (!aPseudoElement && !aPseudoElementArgs),
"negated selectors shouldn't have a place to store "
"pseudo elements");
if (! GetToken(false)) { // premature eof
REPORT_UNEXPECTED_EOF(PEPseudoSelEOF);
return eSelectorParsingStatus_Error;
}
// First, find out whether we are parsing a CSS3 pseudo-element
bool parsingPseudoElement = false;
if (mToken.IsSymbol(':')) {
parsingPseudoElement = true;
if (! GetToken(false)) { // premature eof
REPORT_UNEXPECTED_EOF(PEPseudoSelEOF);
return eSelectorParsingStatus_Error;
}
}
// Do some sanity-checking on the token
if (eCSSToken_Ident != mToken.mType && eCSSToken_Function != mToken.mType) {
// malformed selector
REPORT_UNEXPECTED_TOKEN(PEPseudoSelBadName);
UngetToken();
return eSelectorParsingStatus_Error;
}
// OK, now we know we have an mIdent. Atomize it. All the atoms, for
// pseudo-classes as well as pseudo-elements, start with a single ':'.
nsAutoString buffer;
buffer.Append(PRUnichar(':'));
buffer.Append(mToken.mIdent);
nsContentUtils::ASCIIToLower(buffer);
nsCOMPtr<nsIAtom> pseudo = do_GetAtom(buffer);
if (!pseudo) {
NS_RUNTIMEABORT("do_GetAtom failed - out of memory?");
}
// stash away some info about this pseudo so we only have to get it once.
bool isTreePseudo = false;
nsCSSPseudoElements::Type pseudoElementType =
nsCSSPseudoElements::GetPseudoType(pseudo);
nsCSSPseudoClasses::Type pseudoClassType =
nsCSSPseudoClasses::GetPseudoType(pseudo);
// We currently allow :-moz-placeholder and ::-moz-placeholder. We have to
// be a bit stricter regarding the pseudo-element parsing rules.
if (pseudoElementType == nsCSSPseudoElements::ePseudo_mozPlaceholder &&
pseudoClassType == nsCSSPseudoClasses::ePseudoClass_mozPlaceholder) {
if (parsingPseudoElement) {
pseudoClassType = nsCSSPseudoClasses::ePseudoClass_NotPseudoClass;
} else {
pseudoElementType = nsCSSPseudoElements::ePseudo_NotPseudoElement;
}
}
#ifdef MOZ_XUL
isTreePseudo = (pseudoElementType == nsCSSPseudoElements::ePseudo_XULTree);
// If a tree pseudo-element is using the function syntax, it will
// get isTree set here and will pass the check below that only
// allows functions if they are in our list of things allowed to be
// functions. If it is _not_ using the function syntax, isTree will
// be false, and it will still pass that check. So the tree
// pseudo-elements are allowed to be either functions or not, as
// desired.
bool isTree = (eCSSToken_Function == mToken.mType) && isTreePseudo;
#endif
bool isPseudoElement =
(pseudoElementType < nsCSSPseudoElements::ePseudo_PseudoElementCount);
// anonymous boxes are only allowed if they're the tree boxes or we have
// enabled unsafe rules
bool isAnonBox = isTreePseudo ||
(pseudoElementType == nsCSSPseudoElements::ePseudo_AnonBox &&
mUnsafeRulesEnabled);
bool isPseudoClass =
(pseudoClassType != nsCSSPseudoClasses::ePseudoClass_NotPseudoClass);
NS_ASSERTION(!isPseudoClass ||
pseudoElementType == nsCSSPseudoElements::ePseudo_NotPseudoElement,
"Why is this atom both a pseudo-class and a pseudo-element?");
NS_ASSERTION(isPseudoClass + isPseudoElement + isAnonBox <= 1,
"Shouldn't be more than one of these");
if (!isPseudoClass && !isPseudoElement && !isAnonBox) {
// Not a pseudo-class, not a pseudo-element.... forget it
REPORT_UNEXPECTED_TOKEN(PEPseudoSelUnknown);
UngetToken();
return eSelectorParsingStatus_Error;
}
// If it's a function token, it better be on our "ok" list, and if the name
// is that of a function pseudo it better be a function token
if ((eCSSToken_Function == mToken.mType) !=
(
#ifdef MOZ_XUL
isTree ||
#endif
nsCSSPseudoClasses::ePseudoClass_notPseudo == pseudoClassType ||
nsCSSPseudoClasses::HasStringArg(pseudoClassType) ||
nsCSSPseudoClasses::HasNthPairArg(pseudoClassType) ||
nsCSSPseudoClasses::HasSelectorListArg(pseudoClassType))) {
// There are no other function pseudos
REPORT_UNEXPECTED_TOKEN(PEPseudoSelNonFunc);
UngetToken();
return eSelectorParsingStatus_Error;
}
// If it starts with "::", it better be a pseudo-element
if (parsingPseudoElement &&
!isPseudoElement &&
!isAnonBox) {
REPORT_UNEXPECTED_TOKEN(PEPseudoSelNotPE);
UngetToken();
return eSelectorParsingStatus_Error;
}
if (!parsingPseudoElement &&
nsCSSPseudoClasses::ePseudoClass_notPseudo == pseudoClassType) {
if (aIsNegated) { // :not() can't be itself negated
REPORT_UNEXPECTED_TOKEN(PEPseudoSelDoubleNot);
UngetToken();
return eSelectorParsingStatus_Error;
}
// CSS 3 Negation pseudo-class takes one simple selector as argument
nsSelectorParsingStatus parsingStatus =
ParseNegatedSimpleSelector(aDataMask, aSelector);
if (eSelectorParsingStatus_Continue != parsingStatus) {
return parsingStatus;
}
}
else if (!parsingPseudoElement && isPseudoClass) {
aDataMask |= SEL_MASK_PCLASS;
if (eCSSToken_Function == mToken.mType) {
nsSelectorParsingStatus parsingStatus;
if (nsCSSPseudoClasses::HasStringArg(pseudoClassType)) {
parsingStatus =
ParsePseudoClassWithIdentArg(aSelector, pseudoClassType);
}
else if (nsCSSPseudoClasses::HasNthPairArg(pseudoClassType)) {
parsingStatus =
ParsePseudoClassWithNthPairArg(aSelector, pseudoClassType);
}
else {
NS_ABORT_IF_FALSE(nsCSSPseudoClasses::HasSelectorListArg(pseudoClassType),
"unexpected pseudo with function token");
parsingStatus = ParsePseudoClassWithSelectorListArg(aSelector,
pseudoClassType);
}
if (eSelectorParsingStatus_Continue != parsingStatus) {
if (eSelectorParsingStatus_Error == parsingStatus) {
SkipUntil(')');
}
return parsingStatus;
}
}
else {
aSelector.AddPseudoClass(pseudoClassType);
}
}
else if (isPseudoElement || isAnonBox) {
// Pseudo-element. Make some more sanity checks.
if (aIsNegated) { // pseudo-elements can't be negated
REPORT_UNEXPECTED_TOKEN(PEPseudoSelPEInNot);
UngetToken();
return eSelectorParsingStatus_Error;
}
// CSS2 pseudo-elements and -moz-tree-* pseudo-elements are allowed
// to have a single ':' on them. Others (CSS3+ pseudo-elements and
// various -moz-* pseudo-elements) must have |parsingPseudoElement|
// set.
if (!parsingPseudoElement &&
!nsCSSPseudoElements::IsCSS2PseudoElement(pseudo)
#ifdef MOZ_XUL
&& !isTreePseudo
#endif
) {
REPORT_UNEXPECTED_TOKEN(PEPseudoSelNewStyleOnly);
UngetToken();
return eSelectorParsingStatus_Error;
}
if (0 == (aDataMask & SEL_MASK_PELEM)) {
aDataMask |= SEL_MASK_PELEM;
NS_ADDREF(*aPseudoElement = pseudo);
*aPseudoElementType = pseudoElementType;
#ifdef MOZ_XUL
if (isTree) {
// We have encountered a pseudoelement of the form
// -moz-tree-xxxx(a,b,c). We parse (a,b,c) and add each
// item in the list to the pseudoclass list. They will be pulled
// from the list later along with the pseudo-element.
if (!ParseTreePseudoElement(aPseudoElementArgs)) {
return eSelectorParsingStatus_Error;
}
}
#endif
// the next *non*whitespace token must be '{' or ',' or EOF
if (!GetToken(true)) { // premature eof is ok (here!)
return eSelectorParsingStatus_Done;
}
if ((mToken.IsSymbol('{') || mToken.IsSymbol(','))) {
UngetToken();
return eSelectorParsingStatus_Done;
}
REPORT_UNEXPECTED_TOKEN(PEPseudoSelTrailing);
UngetToken();
return eSelectorParsingStatus_Error;
}
else { // multiple pseudo elements, not legal
REPORT_UNEXPECTED_TOKEN(PEPseudoSelMultiplePE);
UngetToken();
return eSelectorParsingStatus_Error;
}
}
#ifdef DEBUG
else {
// We should never end up here. Indeed, if we ended up here, we know (from
// the current if/else cascade) that !isPseudoElement and !isAnonBox. But
// then due to our earlier check we know that isPseudoClass. Since we
// didn't fall into the isPseudoClass case in this cascade, we must have
// parsingPseudoElement. But we've already checked the
// parsingPseudoElement && !isPseudoClass && !isAnonBox case and bailed if
// it's happened.
NS_NOTREACHED("How did this happen?");
}
#endif
return eSelectorParsingStatus_Continue;
}
//
// Parse the argument of a negation pseudo-class :not()
//
CSSParserImpl::nsSelectorParsingStatus
CSSParserImpl::ParseNegatedSimpleSelector(int32_t& aDataMask,
nsCSSSelector& aSelector)
{
if (! GetToken(true)) { // premature eof
REPORT_UNEXPECTED_EOF(PENegationEOF);
return eSelectorParsingStatus_Error;
}
if (mToken.IsSymbol(')')) {
REPORT_UNEXPECTED_TOKEN(PENegationBadArg);
return eSelectorParsingStatus_Error;
}
// Create a new nsCSSSelector and add it to the end of
// aSelector.mNegations.
// Given the current parsing rules, every selector in mNegations
// contains only one simple selector (css3 definition) within it.
// This could easily change in future versions of CSS, and the only
// thing we need to change to support that is this parsing code and the
// serialization code for nsCSSSelector.
nsCSSSelector *newSel = new nsCSSSelector();
nsCSSSelector* negations = &aSelector;
while (negations->mNegations) {
negations = negations->mNegations;
}
negations->mNegations = newSel;
nsSelectorParsingStatus parsingStatus;
if (eCSSToken_ID == mToken.mType) { // #id
parsingStatus = ParseIDSelector(aDataMask, *newSel);
}
else if (mToken.IsSymbol('.')) { // .class
parsingStatus = ParseClassSelector(aDataMask, *newSel);
}
else if (mToken.IsSymbol(':')) { // :pseudo
parsingStatus = ParsePseudoSelector(aDataMask, *newSel, true,
nullptr, nullptr, nullptr);
}
else if (mToken.IsSymbol('[')) { // [attribute
parsingStatus = ParseAttributeSelector(aDataMask, *newSel);
if (eSelectorParsingStatus_Error == parsingStatus) {
// Skip forward to the matching ']'
SkipUntil(']');
}
}
else {
// then it should be a type element or universal selector
parsingStatus = ParseTypeOrUniversalSelector(aDataMask, *newSel, true);
}
if (eSelectorParsingStatus_Error == parsingStatus) {
REPORT_UNEXPECTED_TOKEN(PENegationBadInner);
SkipUntil(')');
return parsingStatus;
}
// close the parenthesis
if (!ExpectSymbol(')', true)) {
REPORT_UNEXPECTED_TOKEN(PENegationNoClose);
SkipUntil(')');
return eSelectorParsingStatus_Error;
}
NS_ASSERTION(newSel->mNameSpace == kNameSpaceID_Unknown ||
(!newSel->mIDList && !newSel->mClassList &&
!newSel->mPseudoClassList && !newSel->mAttrList),
"Need to fix the serialization code to deal with this");
return eSelectorParsingStatus_Continue;
}
//
// Parse the argument of a pseudo-class that has an ident arg
//
CSSParserImpl::nsSelectorParsingStatus
CSSParserImpl::ParsePseudoClassWithIdentArg(nsCSSSelector& aSelector,
nsCSSPseudoClasses::Type aType)
{
if (! GetToken(true)) { // premature eof
REPORT_UNEXPECTED_EOF(PEPseudoClassArgEOF);
return eSelectorParsingStatus_Error;
}
// We expect an identifier with a language abbreviation
if (eCSSToken_Ident != mToken.mType) {
REPORT_UNEXPECTED_TOKEN(PEPseudoClassArgNotIdent);
UngetToken();
return eSelectorParsingStatus_Error; // our caller calls SkipUntil(')')
}
// -moz-locale-dir and -moz-dir can only have values of 'ltr' or 'rtl'.
if (aType == nsCSSPseudoClasses::ePseudoClass_mozLocaleDir ||
aType == nsCSSPseudoClasses::ePseudoClass_dir) {
nsContentUtils::ASCIIToLower(mToken.mIdent); // case insensitive
if (!mToken.mIdent.EqualsLiteral("ltr") &&
!mToken.mIdent.EqualsLiteral("rtl")) {
REPORT_UNEXPECTED_TOKEN(PEBadDirValue);
return eSelectorParsingStatus_Error; // our caller calls SkipUntil(')')
}
}
// Add the pseudo with the language parameter
aSelector.AddPseudoClass(aType, mToken.mIdent.get());
// close the parenthesis
if (!ExpectSymbol(')', true)) {
REPORT_UNEXPECTED_TOKEN(PEPseudoClassNoClose);
return eSelectorParsingStatus_Error; // our caller calls SkipUntil(')')
}
return eSelectorParsingStatus_Continue;
}
CSSParserImpl::nsSelectorParsingStatus
CSSParserImpl::ParsePseudoClassWithNthPairArg(nsCSSSelector& aSelector,
nsCSSPseudoClasses::Type aType)
{
int32_t numbers[2] = { 0, 0 };
bool lookForB = true;
// Follow the whitespace rules as proposed in
// http://lists.w3.org/Archives/Public/www-style/2008Mar/0121.html
if (! GetToken(true)) {
REPORT_UNEXPECTED_EOF(PEPseudoClassArgEOF);
return eSelectorParsingStatus_Error;
}
if (eCSSToken_Ident == mToken.mType || eCSSToken_Dimension == mToken.mType) {
// The CSS tokenization doesn't handle :nth-child() containing - well:
// 2n-1 is a dimension
// n-1 is an identifier
// The easiest way to deal with that is to push everything from the
// minus on back onto the scanner's pushback buffer.
uint32_t truncAt = 0;
if (StringBeginsWith(mToken.mIdent, NS_LITERAL_STRING("n-"))) {
truncAt = 1;
} else if (StringBeginsWith(mToken.mIdent, NS_LITERAL_STRING("-n-"))) {
truncAt = 2;
}
if (truncAt != 0) {
mScanner->Backup(mToken.mIdent.Length() - truncAt);
mToken.mIdent.Truncate(truncAt);
}
}
if (eCSSToken_Ident == mToken.mType) {
if (mToken.mIdent.LowerCaseEqualsLiteral("odd")) {
numbers[0] = 2;
numbers[1] = 1;
lookForB = false;
}
else if (mToken.mIdent.LowerCaseEqualsLiteral("even")) {
numbers[0] = 2;
numbers[1] = 0;
lookForB = false;
}
else if (mToken.mIdent.LowerCaseEqualsLiteral("n")) {
numbers[0] = 1;
}
else if (mToken.mIdent.LowerCaseEqualsLiteral("-n")) {
numbers[0] = -1;
}
else {
REPORT_UNEXPECTED_TOKEN(PEPseudoClassArgNotNth);
return eSelectorParsingStatus_Error; // our caller calls SkipUntil(')')
}
}
else if (eCSSToken_Number == mToken.mType) {
if (!mToken.mIntegerValid) {
REPORT_UNEXPECTED_TOKEN(PEPseudoClassArgNotNth);
return eSelectorParsingStatus_Error; // our caller calls SkipUntil(')')
}
numbers[1] = mToken.mInteger;
lookForB = false;
}
else if (eCSSToken_Dimension == mToken.mType) {
if (!mToken.mIntegerValid || !mToken.mIdent.LowerCaseEqualsLiteral("n")) {
REPORT_UNEXPECTED_TOKEN(PEPseudoClassArgNotNth);
return eSelectorParsingStatus_Error; // our caller calls SkipUntil(')')
}
numbers[0] = mToken.mInteger;
}
// XXX If it's a ')', is that valid? (as 0n+0)
else {
REPORT_UNEXPECTED_TOKEN(PEPseudoClassArgNotNth);
UngetToken();
return eSelectorParsingStatus_Error; // our caller calls SkipUntil(')')
}
if (! GetToken(true)) {
REPORT_UNEXPECTED_EOF(PEPseudoClassArgEOF);
return eSelectorParsingStatus_Error;
}
if (lookForB && !mToken.IsSymbol(')')) {
// The '+' or '-' sign can optionally be separated by whitespace.
// If it is separated by whitespace from what follows it, it appears
// as a separate token rather than part of the number token.
bool haveSign = false;
int32_t sign = 1;
if (mToken.IsSymbol('+') || mToken.IsSymbol('-')) {
haveSign = true;
if (mToken.IsSymbol('-')) {
sign = -1;
}
if (! GetToken(true)) {
REPORT_UNEXPECTED_EOF(PEPseudoClassArgEOF);
return eSelectorParsingStatus_Error;
}
}
if (eCSSToken_Number != mToken.mType ||
!mToken.mIntegerValid || mToken.mHasSign == haveSign) {
REPORT_UNEXPECTED_TOKEN(PEPseudoClassArgNotNth);
return eSelectorParsingStatus_Error; // our caller calls SkipUntil(')')
}
numbers[1] = mToken.mInteger * sign;
if (! GetToken(true)) {
REPORT_UNEXPECTED_EOF(PEPseudoClassArgEOF);
return eSelectorParsingStatus_Error;
}
}
if (!mToken.IsSymbol(')')) {
REPORT_UNEXPECTED_TOKEN(PEPseudoClassNoClose);
return eSelectorParsingStatus_Error; // our caller calls SkipUntil(')')
}
aSelector.AddPseudoClass(aType, numbers);
return eSelectorParsingStatus_Continue;
}
//
// Parse the argument of a pseudo-class that has a selector list argument.
// Such selector lists cannot contain combinators, but can contain
// anything that goes between a pair of combinators.
//
CSSParserImpl::nsSelectorParsingStatus
CSSParserImpl::ParsePseudoClassWithSelectorListArg(nsCSSSelector& aSelector,
nsCSSPseudoClasses::Type aType)
{
nsAutoPtr<nsCSSSelectorList> slist;
if (! ParseSelectorList(*getter_Transfers(slist), PRUnichar(')'))) {
return eSelectorParsingStatus_Error; // our caller calls SkipUntil(')')
}
// Check that none of the selectors in the list have combinators or
// pseudo-elements.
for (nsCSSSelectorList *l = slist; l; l = l->mNext) {
nsCSSSelector *s = l->mSelectors;
if (s->mNext || s->IsPseudoElement()) {
return eSelectorParsingStatus_Error; // our caller calls SkipUntil(')')
}
}
// Add the pseudo with the selector list parameter
aSelector.AddPseudoClass(aType, slist.forget());
// close the parenthesis
if (!ExpectSymbol(')', true)) {
REPORT_UNEXPECTED_TOKEN(PEPseudoClassNoClose);
return eSelectorParsingStatus_Error; // our caller calls SkipUntil(')')
}
return eSelectorParsingStatus_Continue;
}
/**
* This is the format for selectors:
* operator? [[namespace |]? element_name]? [ ID | class | attrib | pseudo ]*
*/
bool
CSSParserImpl::ParseSelector(nsCSSSelectorList* aList,
PRUnichar aPrevCombinator)
{
if (! GetToken(true)) {
REPORT_UNEXPECTED_EOF(PESelectorEOF);
return false;
}
nsCSSSelector* selector = aList->AddSelector(aPrevCombinator);
nsCOMPtr<nsIAtom> pseudoElement;
nsAutoPtr<nsAtomList> pseudoElementArgs;
nsCSSPseudoElements::Type pseudoElementType =
nsCSSPseudoElements::ePseudo_NotPseudoElement;
int32_t dataMask = 0;
nsSelectorParsingStatus parsingStatus =
ParseTypeOrUniversalSelector(dataMask, *selector, false);
while (parsingStatus == eSelectorParsingStatus_Continue) {
if (eCSSToken_ID == mToken.mType) { // #id
parsingStatus = ParseIDSelector(dataMask, *selector);
}
else if (mToken.IsSymbol('.')) { // .class
parsingStatus = ParseClassSelector(dataMask, *selector);
}
else if (mToken.IsSymbol(':')) { // :pseudo
parsingStatus = ParsePseudoSelector(dataMask, *selector, false,
getter_AddRefs(pseudoElement),
getter_Transfers(pseudoElementArgs),
&pseudoElementType);
}
else if (mToken.IsSymbol('[')) { // [attribute
parsingStatus = ParseAttributeSelector(dataMask, *selector);
if (eSelectorParsingStatus_Error == parsingStatus) {
SkipUntil(']');
}
}
else { // not a selector token, we're done
parsingStatus = eSelectorParsingStatus_Done;
UngetToken();
break;
}
if (parsingStatus != eSelectorParsingStatus_Continue) {
break;
}
if (! GetToken(false)) { // premature eof is ok (here!)
parsingStatus = eSelectorParsingStatus_Done;
break;
}
}
if (parsingStatus == eSelectorParsingStatus_Error) {
return false;
}
if (!dataMask) {
if (selector->mNext) {
REPORT_UNEXPECTED(PESelectorGroupExtraCombinator);
} else {
REPORT_UNEXPECTED(PESelectorGroupNoSelector);
}
return false;
}
if (pseudoElementType == nsCSSPseudoElements::ePseudo_AnonBox) {
// We got an anonymous box pseudo-element; it must be the only
// thing in this selector group.
if (selector->mNext || !IsUniversalSelector(*selector)) {
REPORT_UNEXPECTED(PEAnonBoxNotAlone);
return false;
}
// Rewrite the current selector as this pseudo-element.
// It does not contribute to selector weight.
selector->mLowercaseTag.swap(pseudoElement);
selector->mClassList = pseudoElementArgs.forget();
selector->SetPseudoType(pseudoElementType);
return true;
}
aList->mWeight += selector->CalcWeight();
// Pseudo-elements other than anonymous boxes are represented as
// direct children ('>' combinator) of the rest of the selector.
if (pseudoElement) {
selector = aList->AddSelector('>');
selector->mLowercaseTag.swap(pseudoElement);
selector->mClassList = pseudoElementArgs.forget();
selector->SetPseudoType(pseudoElementType);
}
return true;
}
css::Declaration*
CSSParserImpl::ParseDeclarationBlock(uint32_t aFlags, nsCSSContextType aContext)
{
bool checkForBraces = (aFlags & eParseDeclaration_InBraces) != 0;
if (checkForBraces) {
if (!ExpectSymbol('{', true)) {
REPORT_UNEXPECTED_TOKEN(PEBadDeclBlockStart);
OUTPUT_ERROR();
return nullptr;
}
}
css::Declaration* declaration = new css::Declaration();
mData.AssertInitialState();
if (declaration) {
for (;;) {
bool changed;
if (!ParseDeclaration(declaration, aFlags, true, &changed, aContext)) {
if (!SkipDeclaration(checkForBraces)) {
break;
}
if (checkForBraces) {
if (ExpectSymbol('}', true)) {
break;
}
}
// Since the skipped declaration didn't end the block we parse
// the next declaration.
}
}
declaration->CompressFrom(&mData);
}
return declaration;
}
// The types to pass to ParseColorComponent. These correspond to the
// various datatypes that can go within rgb().
#define COLOR_TYPE_UNKNOWN 0
#define COLOR_TYPE_INTEGERS 1
#define COLOR_TYPE_PERCENTAGES 2
bool
CSSParserImpl::ParseColor(nsCSSValue& aValue)
{
if (!GetToken(true)) {
REPORT_UNEXPECTED_EOF(PEColorEOF);
return false;
}
nsCSSToken* tk = &mToken;
nscolor rgba;
switch (tk->mType) {
case eCSSToken_ID:
case eCSSToken_Hash:
// #xxyyzz
if (NS_HexToRGB(tk->mIdent, &rgba)) {
aValue.SetColorValue(rgba);
return true;
}
break;
case eCSSToken_Ident:
if (NS_ColorNameToRGB(tk->mIdent, &rgba)) {
aValue.SetStringValue(tk->mIdent, eCSSUnit_Ident);
return true;
}
else {
nsCSSKeyword keyword = nsCSSKeywords::LookupKeyword(tk->mIdent);
if (eCSSKeyword_UNKNOWN < keyword) { // known keyword
int32_t value;
if (nsCSSProps::FindKeyword(keyword, nsCSSProps::kColorKTable, value)) {
aValue.SetIntValue(value, eCSSUnit_EnumColor);
return true;
}
}
}
break;
case eCSSToken_Function:
if (mToken.mIdent.LowerCaseEqualsLiteral("rgb")) {
// rgb ( component , component , component )
uint8_t r, g, b;
int32_t type = COLOR_TYPE_UNKNOWN;
if (ParseColorComponent(r, type, ',') &&
ParseColorComponent(g, type, ',') &&
ParseColorComponent(b, type, ')')) {
aValue.SetColorValue(NS_RGB(r,g,b));
return true;
}
SkipUntil(')');
return false;
}
else if (mToken.mIdent.LowerCaseEqualsLiteral("-moz-rgba") ||
mToken.mIdent.LowerCaseEqualsLiteral("rgba")) {
// rgba ( component , component , component , opacity )
uint8_t r, g, b, a;
int32_t type = COLOR_TYPE_UNKNOWN;
if (ParseColorComponent(r, type, ',') &&
ParseColorComponent(g, type, ',') &&
ParseColorComponent(b, type, ',') &&
ParseColorOpacity(a)) {
aValue.SetColorValue(NS_RGBA(r, g, b, a));
return true;
}
SkipUntil(')');
return false;
}
else if (mToken.mIdent.LowerCaseEqualsLiteral("hsl")) {
// hsl ( hue , saturation , lightness )
// "hue" is a number, "saturation" and "lightness" are percentages.
if (ParseHSLColor(rgba, ')')) {
aValue.SetColorValue(rgba);
return true;
}
SkipUntil(')');
return false;
}
else if (mToken.mIdent.LowerCaseEqualsLiteral("-moz-hsla") ||
mToken.mIdent.LowerCaseEqualsLiteral("hsla")) {
// hsla ( hue , saturation , lightness , opacity )
// "hue" is a number, "saturation" and "lightness" are percentages,
// "opacity" is a number.
uint8_t a;
if (ParseHSLColor(rgba, ',') &&
ParseColorOpacity(a)) {
aValue.SetColorValue(NS_RGBA(NS_GET_R(rgba), NS_GET_G(rgba),
NS_GET_B(rgba), a));
return true;
}
SkipUntil(')');
return false;
}
break;
default:
break;
}
// try 'xxyyzz' without '#' prefix for compatibility with IE and Nav4x (bug 23236 and 45804)
if (mHashlessColorQuirk) {
// - If the string starts with 'a-f', the nsCSSScanner builds the
// token as a eCSSToken_Ident and we can parse the string as a
// 'xxyyzz' RGB color.
// - If it only contains '0-9' digits, the token is a
// eCSSToken_Number and it must be converted back to a 6
// characters string to be parsed as a RGB color.
// - If it starts with '0-9' and contains any 'a-f', the token is a
// eCSSToken_Dimension, the mNumber part must be converted back to
// a string and the mIdent part must be appended to that string so
// that the resulting string has 6 characters.
// Note: This is a hack for Nav compatibility. Do not attempt to
// simplify it by hacking into the ncCSSScanner. This would be very
// bad.
nsAutoString str;
char buffer[20];
switch (tk->mType) {
case eCSSToken_Ident:
str.Assign(tk->mIdent);
break;
case eCSSToken_Number:
if (tk->mIntegerValid) {
PR_snprintf(buffer, sizeof(buffer), "%06d", tk->mInteger);
str.AssignWithConversion(buffer);
}
break;
case eCSSToken_Dimension:
if (tk->mIdent.Length() <= 6) {
PR_snprintf(buffer, sizeof(buffer), "%06.0f", tk->mNumber);
nsAutoString temp;
temp.AssignWithConversion(buffer);
temp.Right(str, 6 - tk->mIdent.Length());
str.Append(tk->mIdent);
}
break;
default:
// There is a whole bunch of cases that are
// not handled by this switch. Ignore them.
break;
}
if (NS_HexToRGB(str, &rgba)) {
aValue.SetColorValue(rgba);
return true;
}
}
// It's not a color
REPORT_UNEXPECTED_TOKEN(PEColorNotColor);
UngetToken();
return false;
}
// aType will be set if we have already parsed other color components
// in this color spec
bool
CSSParserImpl::ParseColorComponent(uint8_t& aComponent,
int32_t& aType,
char aStop)
{
if (!GetToken(true)) {
REPORT_UNEXPECTED_EOF(PEColorComponentEOF);
return false;
}
float value;
nsCSSToken* tk = &mToken;
switch (tk->mType) {
case eCSSToken_Number:
switch (aType) {
case COLOR_TYPE_UNKNOWN:
aType = COLOR_TYPE_INTEGERS;
break;
case COLOR_TYPE_INTEGERS:
break;
case COLOR_TYPE_PERCENTAGES:
REPORT_UNEXPECTED_TOKEN(PEExpectedPercent);
UngetToken();
return false;
default:
NS_NOTREACHED("Someone forgot to add the new color component type in here");
}
if (!mToken.mIntegerValid) {
REPORT_UNEXPECTED_TOKEN(PEExpectedInt);
UngetToken();
return false;
}
value = tk->mNumber;
break;
case eCSSToken_Percentage:
switch (aType) {
case COLOR_TYPE_UNKNOWN:
aType = COLOR_TYPE_PERCENTAGES;
break;
case COLOR_TYPE_INTEGERS:
REPORT_UNEXPECTED_TOKEN(PEExpectedInt);
UngetToken();
return false;
case COLOR_TYPE_PERCENTAGES:
break;
default:
NS_NOTREACHED("Someone forgot to add the new color component type in here");
}
value = tk->mNumber * 255.0f;
break;
default:
REPORT_UNEXPECTED_TOKEN(PEColorBadRGBContents);
UngetToken();
return false;
}
if (ExpectSymbol(aStop, true)) {
if (value < 0.0f) value = 0.0f;
if (value > 255.0f) value = 255.0f;
aComponent = NSToIntRound(value);
return true;
}
REPORT_UNEXPECTED_TOKEN_CHAR(PEColorComponentBadTerm, aStop);
return false;
}
bool
CSSParserImpl::ParseHSLColor(nscolor& aColor,
char aStop)
{
float h, s, l;
// Get the hue
if (!GetToken(true)) {
REPORT_UNEXPECTED_EOF(PEColorHueEOF);
return false;
}
if (mToken.mType != eCSSToken_Number) {
REPORT_UNEXPECTED_TOKEN(PEExpectedNumber);
UngetToken();
return false;
}
h = mToken.mNumber;
h /= 360.0f;
// hue values are wraparound
h = h - floor(h);
if (!ExpectSymbol(',', true)) {
REPORT_UNEXPECTED_TOKEN(PEExpectedComma);
return false;
}
// Get the saturation
if (!GetToken(true)) {
REPORT_UNEXPECTED_EOF(PEColorSaturationEOF);
return false;
}
if (mToken.mType != eCSSToken_Percentage) {
REPORT_UNEXPECTED_TOKEN(PEExpectedPercent);
UngetToken();
return false;
}
s = mToken.mNumber;
if (s < 0.0f) s = 0.0f;
if (s > 1.0f) s = 1.0f;
if (!ExpectSymbol(',', true)) {
REPORT_UNEXPECTED_TOKEN(PEExpectedComma);
return false;
}
// Get the lightness
if (!GetToken(true)) {
REPORT_UNEXPECTED_EOF(PEColorLightnessEOF);
return false;
}
if (mToken.mType != eCSSToken_Percentage) {
REPORT_UNEXPECTED_TOKEN(PEExpectedPercent);
UngetToken();
return false;
}
l = mToken.mNumber;
if (l < 0.0f) l = 0.0f;
if (l > 1.0f) l = 1.0f;
if (ExpectSymbol(aStop, true)) {
aColor = NS_HSL2RGB(h, s, l);
return true;
}
REPORT_UNEXPECTED_TOKEN_CHAR(PEColorComponentBadTerm, aStop);
return false;
}
bool
CSSParserImpl::ParseColorOpacity(uint8_t& aOpacity)
{
if (!GetToken(true)) {
REPORT_UNEXPECTED_EOF(PEColorOpacityEOF);
return false;
}
if (mToken.mType != eCSSToken_Number) {
REPORT_UNEXPECTED_TOKEN(PEExpectedNumber);
UngetToken();
return false;
}
if (mToken.mNumber < 0.0f) {
mToken.mNumber = 0.0f;
} else if (mToken.mNumber > 1.0f) {
mToken.mNumber = 1.0f;
}
uint8_t value = nsStyleUtil::FloatToColorComponent(mToken.mNumber);
// Need to compare to something slightly larger
// than 0.5 due to floating point inaccuracies.
NS_ASSERTION(fabs(255.0f*mToken.mNumber - value) <= 0.51f,
"FloatToColorComponent did something weird");
if (!ExpectSymbol(')', true)) {
REPORT_UNEXPECTED_TOKEN(PEExpectedCloseParen);
return false;
}
aOpacity = value;
return true;
}
#ifdef MOZ_XUL
bool
CSSParserImpl::ParseTreePseudoElement(nsAtomList **aPseudoElementArgs)
{
// The argument to a tree pseudo-element is a sequence of identifiers
// that are either space- or comma-separated. (Was the intent to
// allow only comma-separated? That's not what was done.)
nsCSSSelector fakeSelector; // so we can reuse AddPseudoClass
while (!ExpectSymbol(')', true)) {
if (!GetToken(true)) {
return false;
}
if (eCSSToken_Ident == mToken.mType) {
fakeSelector.AddClass(mToken.mIdent);
}
else if (!mToken.IsSymbol(',')) {
UngetToken();
SkipUntil(')');
return false;
}
}
*aPseudoElementArgs = fakeSelector.mClassList;
fakeSelector.mClassList = nullptr;
return true;
}
#endif
//----------------------------------------------------------------------
bool
CSSParserImpl::ParseDeclaration(css::Declaration* aDeclaration,
uint32_t aFlags,
bool aMustCallValueAppended,
bool* aChanged,
nsCSSContextType aContext)
{
NS_PRECONDITION(aContext == eCSSContext_General ||
aContext == eCSSContext_Page,
"Must be page or general context");
bool checkForBraces = (aFlags & eParseDeclaration_InBraces) != 0;
mTempData.AssertInitialState();
// Get property name
nsCSSToken* tk = &mToken;
nsAutoString propertyName;
for (;;) {
if (!GetToken(true)) {
if (checkForBraces) {
REPORT_UNEXPECTED_EOF(PEDeclEndEOF);
}
return false;
}
if (eCSSToken_Ident == tk->mType) {
propertyName = tk->mIdent;
// grab the ident before the ExpectSymbol trashes the token
if (!ExpectSymbol(':', true)) {
REPORT_UNEXPECTED_TOKEN(PEParseDeclarationNoColon);
REPORT_UNEXPECTED(PEDeclDropped);
OUTPUT_ERROR();
return false;
}
break;
}
if (tk->IsSymbol(';')) {
// dangling semicolons are skipped
continue;
}
if (!tk->IsSymbol('}')) {
REPORT_UNEXPECTED_TOKEN(PEParseDeclarationDeclExpected);
REPORT_UNEXPECTED(PEDeclSkipped);
OUTPUT_ERROR();
}
// Not a declaration...
UngetToken();
return false;
}
// Don't report property parse errors if we're inside a failing @supports
// rule.
nsAutoSuppressErrors suppressErrors(this, mInFailingSupportsRule);
// Map property name to its ID and then parse the property
nsCSSProperty propID = nsCSSProps::LookupProperty(propertyName,
nsCSSProps::eEnabled);
if (eCSSProperty_UNKNOWN == propID ||
(aContext == eCSSContext_Page &&
!nsCSSProps::PropHasFlags(propID, CSS_PROPERTY_APPLIES_TO_PAGE_RULE))) { // unknown property
if (!NonMozillaVendorIdentifier(propertyName)) {
REPORT_UNEXPECTED_P(PEUnknownProperty, propertyName);
REPORT_UNEXPECTED(PEDeclDropped);
OUTPUT_ERROR();
}
return false;
}
if (! ParseProperty(propID)) {
// XXX Much better to put stuff in the value parsers instead...
REPORT_UNEXPECTED_P(PEValueParsingError, propertyName);
REPORT_UNEXPECTED(PEDeclDropped);
OUTPUT_ERROR();
mTempData.ClearProperty(propID);
mTempData.AssertInitialState();
return false;
}
CLEAR_ERROR();
// Look for "!important".
PriorityParsingStatus status;
if ((aFlags & eParseDeclaration_AllowImportant) != 0) {
status = ParsePriority();
}
else {
status = ePriority_None;
}
// Look for a semicolon or close brace.
if (status != ePriority_Error) {
if (!GetToken(true)) {
// EOF is always ok
} else if (mToken.IsSymbol(';')) {
// semicolon is always ok
} else if (mToken.IsSymbol('}')) {
// brace is ok if checkForBraces, but don't eat it
UngetToken();
if (!checkForBraces) {
status = ePriority_Error;
}
} else {
UngetToken();
status = ePriority_Error;
}
}
if (status == ePriority_Error) {
if (checkForBraces) {
REPORT_UNEXPECTED_TOKEN(PEBadDeclOrRuleEnd2);
} else {
REPORT_UNEXPECTED_TOKEN(PEBadDeclEnd);
}
REPORT_UNEXPECTED(PEDeclDropped);
OUTPUT_ERROR();
mTempData.ClearProperty(propID);
mTempData.AssertInitialState();
return false;
}
*aChanged |= mData.TransferFromBlock(mTempData, propID,
status == ePriority_Important,
false, aMustCallValueAppended,
aDeclaration);
return true;
}
static const nsCSSProperty kBorderTopIDs[] = {
eCSSProperty_border_top_width,
eCSSProperty_border_top_style,
eCSSProperty_border_top_color
};
static const nsCSSProperty kBorderRightIDs[] = {
eCSSProperty_border_right_width_value,
eCSSProperty_border_right_style_value,
eCSSProperty_border_right_color_value,
eCSSProperty_border_right_width,
eCSSProperty_border_right_style,
eCSSProperty_border_right_color
};
static const nsCSSProperty kBorderBottomIDs[] = {
eCSSProperty_border_bottom_width,
eCSSProperty_border_bottom_style,
eCSSProperty_border_bottom_color
};
static const nsCSSProperty kBorderLeftIDs[] = {
eCSSProperty_border_left_width_value,
eCSSProperty_border_left_style_value,
eCSSProperty_border_left_color_value,
eCSSProperty_border_left_width,
eCSSProperty_border_left_style,
eCSSProperty_border_left_color
};
static const nsCSSProperty kBorderStartIDs[] = {
eCSSProperty_border_start_width_value,
eCSSProperty_border_start_style_value,
eCSSProperty_border_start_color_value,
eCSSProperty_border_start_width,
eCSSProperty_border_start_style,
eCSSProperty_border_start_color
};
static const nsCSSProperty kBorderEndIDs[] = {
eCSSProperty_border_end_width_value,
eCSSProperty_border_end_style_value,
eCSSProperty_border_end_color_value,
eCSSProperty_border_end_width,
eCSSProperty_border_end_style,
eCSSProperty_border_end_color
};
static const nsCSSProperty kColumnRuleIDs[] = {
eCSSProperty__moz_column_rule_width,
eCSSProperty__moz_column_rule_style,
eCSSProperty__moz_column_rule_color
};
bool
CSSParserImpl::ParseEnum(nsCSSValue& aValue,
const int32_t aKeywordTable[])
{
nsSubstring* ident = NextIdent();
if (nullptr == ident) {
return false;
}
nsCSSKeyword keyword = nsCSSKeywords::LookupKeyword(*ident);
if (eCSSKeyword_UNKNOWN < keyword) {
int32_t value;
if (nsCSSProps::FindKeyword(keyword, aKeywordTable, value)) {
aValue.SetIntValue(value, eCSSUnit_Enumerated);
return true;
}
}
// Put the unknown identifier back and return
UngetToken();
return false;
}
struct UnitInfo {
char name[6]; // needs to be long enough for the longest unit, with
// terminating null.
uint32_t length;
nsCSSUnit unit;
int32_t type;
};
#define STR_WITH_LEN(_str) \
_str, sizeof(_str) - 1
const UnitInfo UnitData[] = {
{ STR_WITH_LEN("px"), eCSSUnit_Pixel, VARIANT_LENGTH },
{ STR_WITH_LEN("em"), eCSSUnit_EM, VARIANT_LENGTH },
{ STR_WITH_LEN("ex"), eCSSUnit_XHeight, VARIANT_LENGTH },
{ STR_WITH_LEN("pt"), eCSSUnit_Point, VARIANT_LENGTH },
{ STR_WITH_LEN("in"), eCSSUnit_Inch, VARIANT_LENGTH },
{ STR_WITH_LEN("cm"), eCSSUnit_Centimeter, VARIANT_LENGTH },
{ STR_WITH_LEN("ch"), eCSSUnit_Char, VARIANT_LENGTH },
{ STR_WITH_LEN("rem"), eCSSUnit_RootEM, VARIANT_LENGTH },
{ STR_WITH_LEN("mm"), eCSSUnit_Millimeter, VARIANT_LENGTH },
{ STR_WITH_LEN("mozmm"), eCSSUnit_PhysicalMillimeter, VARIANT_LENGTH },
{ STR_WITH_LEN("vw"), eCSSUnit_ViewportWidth, VARIANT_LENGTH },
{ STR_WITH_LEN("vh"), eCSSUnit_ViewportHeight, VARIANT_LENGTH },
{ STR_WITH_LEN("vmin"), eCSSUnit_ViewportMin, VARIANT_LENGTH },
{ STR_WITH_LEN("vmax"), eCSSUnit_ViewportMax, VARIANT_LENGTH },
{ STR_WITH_LEN("pc"), eCSSUnit_Pica, VARIANT_LENGTH },
{ STR_WITH_LEN("deg"), eCSSUnit_Degree, VARIANT_ANGLE },
{ STR_WITH_LEN("grad"), eCSSUnit_Grad, VARIANT_ANGLE },
{ STR_WITH_LEN("rad"), eCSSUnit_Radian, VARIANT_ANGLE },
{ STR_WITH_LEN("turn"), eCSSUnit_Turn, VARIANT_ANGLE },
{ STR_WITH_LEN("hz"), eCSSUnit_Hertz, VARIANT_FREQUENCY },
{ STR_WITH_LEN("khz"), eCSSUnit_Kilohertz, VARIANT_FREQUENCY },
{ STR_WITH_LEN("s"), eCSSUnit_Seconds, VARIANT_TIME },
{ STR_WITH_LEN("ms"), eCSSUnit_Milliseconds, VARIANT_TIME }
};
#undef STR_WITH_LEN
bool
CSSParserImpl::TranslateDimension(nsCSSValue& aValue,
int32_t aVariantMask,
float aNumber,
const nsString& aUnit)
{
nsCSSUnit units;
int32_t type = 0;
if (!aUnit.IsEmpty()) {
uint32_t i;
for (i = 0; i < ArrayLength(UnitData); ++i) {
if (aUnit.LowerCaseEqualsASCII(UnitData[i].name,
UnitData[i].length)) {
units = UnitData[i].unit;
type = UnitData[i].type;
break;
}
}
if (!mViewportUnitsEnabled &&
(eCSSUnit_ViewportWidth == units ||
eCSSUnit_ViewportHeight == units ||
eCSSUnit_ViewportMin == units ||
eCSSUnit_ViewportMax == units)) {
// Viewport units aren't allowed right now, probably because we're
// inside an @page declaration. Fail.
return false;
}
if (i == ArrayLength(UnitData)) {
// Unknown unit
return false;
}
} else {
// Must be a zero number...
NS_ASSERTION(0 == aNumber, "numbers without units must be 0");
if ((VARIANT_LENGTH & aVariantMask) != 0) {
units = eCSSUnit_Pixel;
type = VARIANT_LENGTH;
}
else if ((VARIANT_ANGLE & aVariantMask) != 0) {
NS_ASSERTION(aVariantMask & VARIANT_ZERO_ANGLE,
"must have allowed zero angle");
units = eCSSUnit_Degree;
type = VARIANT_ANGLE;
}
else {
NS_ERROR("Variant mask does not include dimension; why were we called?");
return false;
}
}
if ((type & aVariantMask) != 0) {
aValue.SetFloatValue(aNumber, units);
return true;
}
return false;
}
// Note that this does include VARIANT_CALC, which is numeric. This is
// because calc() parsing, as proposed, drops range restrictions inside
// the calc() expression and clamps the result of the calculation to the
// range.
#define VARIANT_ALL_NONNUMERIC \
VARIANT_KEYWORD | \
VARIANT_COLOR | \
VARIANT_URL | \
VARIANT_STRING | \
VARIANT_COUNTER | \
VARIANT_ATTR | \
VARIANT_IDENTIFIER | \
VARIANT_IDENTIFIER_NO_INHERIT | \
VARIANT_AUTO | \
VARIANT_INHERIT | \
VARIANT_NONE | \
VARIANT_NORMAL | \
VARIANT_SYSFONT | \
VARIANT_GRADIENT | \
VARIANT_TIMING_FUNCTION | \
VARIANT_ALL | \
VARIANT_CALC
// Note that callers passing VARIANT_CALC in aVariantMask will get
// full-range parsing inside the calc() expression, and the code that
// computes the calc will be required to clamp the resulting value to an
// appropriate range.
bool
CSSParserImpl::ParseNonNegativeVariant(nsCSSValue& aValue,
int32_t aVariantMask,
const int32_t aKeywordTable[])
{
// The variant mask must only contain non-numeric variants or the ones
// that we specifically handle.
NS_ABORT_IF_FALSE((aVariantMask & ~(VARIANT_ALL_NONNUMERIC |
VARIANT_NUMBER |
VARIANT_LENGTH |
VARIANT_PERCENT |
VARIANT_INTEGER)) == 0,
"need to update code below to handle additional variants");
if (ParseVariant(aValue, aVariantMask, aKeywordTable)) {
if (eCSSUnit_Number == aValue.GetUnit() ||
aValue.IsLengthUnit()){
if (aValue.GetFloatValue() < 0) {
UngetToken();
return false;
}
}
else if (aValue.GetUnit() == eCSSUnit_Percent) {
if (aValue.GetPercentValue() < 0) {
UngetToken();
return false;
}
} else if (aValue.GetUnit() == eCSSUnit_Integer) {
if (aValue.GetIntValue() < 0) {
UngetToken();
return false;
}
}
return true;
}
return false;
}
// Note that callers passing VARIANT_CALC in aVariantMask will get
// full-range parsing inside the calc() expression, and the code that
// computes the calc will be required to clamp the resulting value to an
// appropriate range.
bool
CSSParserImpl::ParseOneOrLargerVariant(nsCSSValue& aValue,
int32_t aVariantMask,
const int32_t aKeywordTable[])
{
// The variant mask must only contain non-numeric variants or the ones
// that we specifically handle.
NS_ABORT_IF_FALSE((aVariantMask & ~(VARIANT_ALL_NONNUMERIC |
VARIANT_NUMBER |
VARIANT_INTEGER)) == 0,
"need to update code below to handle additional variants");
if (ParseVariant(aValue, aVariantMask, aKeywordTable)) {
if (aValue.GetUnit() == eCSSUnit_Integer) {
if (aValue.GetIntValue() < 1) {
UngetToken();
return false;
}
} else if (eCSSUnit_Number == aValue.GetUnit()) {
if (aValue.GetFloatValue() < 1.0f) {
UngetToken();
return false;
}
}
return true;
}
return false;
}
// Assigns to aValue iff it returns true.
bool
CSSParserImpl::ParseVariant(nsCSSValue& aValue,
int32_t aVariantMask,
const int32_t aKeywordTable[])
{
NS_ASSERTION(!(mHashlessColorQuirk && (aVariantMask & VARIANT_COLOR)) ||
!(aVariantMask & VARIANT_NUMBER),
"can't distinguish colors from numbers");
NS_ASSERTION(!(mHashlessColorQuirk && (aVariantMask & VARIANT_COLOR)) ||
!(mUnitlessLengthQuirk && (aVariantMask & VARIANT_LENGTH)),
"can't distinguish colors from lengths");
NS_ASSERTION(!(mUnitlessLengthQuirk && (aVariantMask & VARIANT_LENGTH)) ||
!(aVariantMask & VARIANT_NUMBER),
"can't distinguish lengths from numbers");
NS_ABORT_IF_FALSE(!(aVariantMask & VARIANT_IDENTIFIER) ||
!(aVariantMask & VARIANT_IDENTIFIER_NO_INHERIT),
"must not set both VARIANT_IDENTIFIER and "
"VARIANT_IDENTIFIER_NO_INHERIT");
if (!GetToken(true)) {
return false;
}
nsCSSToken* tk = &mToken;
if (((aVariantMask & (VARIANT_AHK | VARIANT_NORMAL | VARIANT_NONE | VARIANT_ALL)) != 0) &&
(eCSSToken_Ident == tk->mType)) {
nsCSSKeyword keyword = nsCSSKeywords::LookupKeyword(tk->mIdent);
if (eCSSKeyword_UNKNOWN < keyword) { // known keyword
if ((aVariantMask & VARIANT_AUTO) != 0) {
if (eCSSKeyword_auto == keyword) {
aValue.SetAutoValue();
return true;
}
}
if ((aVariantMask & VARIANT_INHERIT) != 0) {
// XXX Should we check IsParsingCompoundProperty, or do all
// callers handle it? (Not all callers set it, though, since
// they want the quirks that are disabled by setting it.)
if (eCSSKeyword_inherit == keyword) {
aValue.SetInheritValue();
return true;
}
else if (eCSSKeyword__moz_initial == keyword ||
eCSSKeyword_initial == keyword) { // anything that can inherit can also take an initial val.
aValue.SetInitialValue();
return true;
}
}
if ((aVariantMask & VARIANT_NONE) != 0) {
if (eCSSKeyword_none == keyword) {
aValue.SetNoneValue();
return true;
}
}
if ((aVariantMask & VARIANT_ALL) != 0) {
if (eCSSKeyword_all == keyword) {
aValue.SetAllValue();
return true;
}
}
if ((aVariantMask & VARIANT_NORMAL) != 0) {
if (eCSSKeyword_normal == keyword) {
aValue.SetNormalValue();
return true;
}
}
if ((aVariantMask & VARIANT_SYSFONT) != 0) {
if (eCSSKeyword__moz_use_system_font == keyword &&
!IsParsingCompoundProperty()) {
aValue.SetSystemFontValue();
return true;
}
}
if ((aVariantMask & VARIANT_KEYWORD) != 0) {
int32_t value;
if (nsCSSProps::FindKeyword(keyword, aKeywordTable, value)) {
aValue.SetIntValue(value, eCSSUnit_Enumerated);
return true;
}
}
}
}
// Check VARIANT_NUMBER and VARIANT_INTEGER before VARIANT_LENGTH or
// VARIANT_ZERO_ANGLE.
if (((aVariantMask & VARIANT_NUMBER) != 0) &&
(eCSSToken_Number == tk->mType)) {
aValue.SetFloatValue(tk->mNumber, eCSSUnit_Number);
return true;
}
if (((aVariantMask & VARIANT_INTEGER) != 0) &&
(eCSSToken_Number == tk->mType) && tk->mIntegerValid) {
aValue.SetIntValue(tk->mInteger, eCSSUnit_Integer);
return true;
}
if (((aVariantMask & (VARIANT_LENGTH | VARIANT_ANGLE |
VARIANT_FREQUENCY | VARIANT_TIME)) != 0 &&
eCSSToken_Dimension == tk->mType) ||
((aVariantMask & (VARIANT_LENGTH | VARIANT_ZERO_ANGLE)) != 0 &&
eCSSToken_Number == tk->mType &&
tk->mNumber == 0.0f)) {
if (((aVariantMask & VARIANT_POSITIVE_DIMENSION) != 0 &&
tk->mNumber <= 0.0) ||
((aVariantMask & VARIANT_NONNEGATIVE_DIMENSION) != 0 &&
tk->mNumber < 0.0)) {
UngetToken();
return false;
}
if (TranslateDimension(aValue, aVariantMask, tk->mNumber, tk->mIdent)) {
return true;
}
// Put the token back; we didn't parse it, so we shouldn't consume it
UngetToken();
return false;
}
if (((aVariantMask & VARIANT_PERCENT) != 0) &&
(eCSSToken_Percentage == tk->mType)) {
aValue.SetPercentValue(tk->mNumber);
return true;
}
if (mUnitlessLengthQuirk) { // NONSTANDARD: Nav interprets unitless numbers as px
if (((aVariantMask & VARIANT_LENGTH) != 0) &&
(eCSSToken_Number == tk->mType)) {
aValue.SetFloatValue(tk->mNumber, eCSSUnit_Pixel);
return true;
}
}
if (IsSVGMode() && !IsParsingCompoundProperty()) {
// STANDARD: SVG Spec states that lengths and coordinates can be unitless
// in which case they default to user-units (1 px = 1 user unit)
if (((aVariantMask & VARIANT_LENGTH) != 0) &&
(eCSSToken_Number == tk->mType)) {
aValue.SetFloatValue(tk->mNumber, eCSSUnit_Pixel);
return true;
}
}
if (((aVariantMask & VARIANT_URL) != 0) &&
eCSSToken_URL == tk->mType) {
SetValueToURL(aValue, tk->mIdent);
return true;
}
if ((aVariantMask & VARIANT_GRADIENT) != 0 &&
eCSSToken_Function == tk->mType) {
// a generated gradient
nsDependentString tmp(tk->mIdent, 0);
bool isLegacy = false;
if (StringBeginsWith(tmp, NS_LITERAL_STRING("-moz-"))) {
tmp.Rebind(tmp, 5);
isLegacy = true;
}
bool isRepeating = false;
if (StringBeginsWith(tmp, NS_LITERAL_STRING("repeating-"))) {
tmp.Rebind(tmp, 10);
isRepeating = true;
}
if (tmp.LowerCaseEqualsLiteral("linear-gradient")) {
return ParseLinearGradient(aValue, isRepeating, isLegacy);
}
if (tmp.LowerCaseEqualsLiteral("radial-gradient")) {
return ParseRadialGradient(aValue, isRepeating, isLegacy);
}
}
if ((aVariantMask & VARIANT_IMAGE_RECT) != 0 &&
eCSSToken_Function == tk->mType &&
tk->mIdent.LowerCaseEqualsLiteral("-moz-image-rect")) {
return ParseImageRect(aValue);
}
if ((aVariantMask & VARIANT_ELEMENT) != 0 &&
eCSSToken_Function == tk->mType &&
tk->mIdent.LowerCaseEqualsLiteral("-moz-element")) {
return ParseElement(aValue);
}
if ((aVariantMask & VARIANT_COLOR) != 0) {
if (mHashlessColorQuirk || // NONSTANDARD: Nav interprets 'xxyyzz' values even without '#' prefix
(eCSSToken_ID == tk->mType) ||
(eCSSToken_Hash == tk->mType) ||
(eCSSToken_Ident == tk->mType) ||
((eCSSToken_Function == tk->mType) &&
(tk->mIdent.LowerCaseEqualsLiteral("rgb") ||
tk->mIdent.LowerCaseEqualsLiteral("hsl") ||
tk->mIdent.LowerCaseEqualsLiteral("-moz-rgba") ||
tk->mIdent.LowerCaseEqualsLiteral("-moz-hsla") ||
tk->mIdent.LowerCaseEqualsLiteral("rgba") ||
tk->mIdent.LowerCaseEqualsLiteral("hsla"))))
{
// Put token back so that parse color can get it
UngetToken();
if (ParseColor(aValue)) {
return true;
}
return false;
}
}
if (((aVariantMask & VARIANT_STRING) != 0) &&
(eCSSToken_String == tk->mType)) {
nsAutoString buffer;
buffer.Append(tk->mIdent);
aValue.SetStringValue(buffer, eCSSUnit_String);
return true;
}
if (((aVariantMask &
(VARIANT_IDENTIFIER | VARIANT_IDENTIFIER_NO_INHERIT)) != 0) &&
(eCSSToken_Ident == tk->mType) &&
((aVariantMask & VARIANT_IDENTIFIER) != 0 ||
!(tk->mIdent.LowerCaseEqualsLiteral("inherit") ||
tk->mIdent.LowerCaseEqualsLiteral("initial")))) {
aValue.SetStringValue(tk->mIdent, eCSSUnit_Ident);
return true;
}
if (((aVariantMask & VARIANT_COUNTER) != 0) &&
(eCSSToken_Function == tk->mType) &&
(tk->mIdent.LowerCaseEqualsLiteral("counter") ||
tk->mIdent.LowerCaseEqualsLiteral("counters"))) {
return ParseCounter(aValue);
}
if (((aVariantMask & VARIANT_ATTR) != 0) &&
(eCSSToken_Function == tk->mType) &&
tk->mIdent.LowerCaseEqualsLiteral("attr")) {
if (!ParseAttr(aValue)) {
SkipUntil(')');
return false;
}
return true;
}
if (((aVariantMask & VARIANT_TIMING_FUNCTION) != 0) &&
(eCSSToken_Function == tk->mType)) {
if (tk->mIdent.LowerCaseEqualsLiteral("cubic-bezier")) {
if (!ParseTransitionTimingFunctionValues(aValue)) {
SkipUntil(')');
return false;
}
return true;
}
if (tk->mIdent.LowerCaseEqualsLiteral("steps")) {
if (!ParseTransitionStepTimingFunctionValues(aValue)) {
SkipUntil(')');
return false;
}
return true;
}
}
if ((aVariantMask & VARIANT_CALC) &&
(eCSSToken_Function == tk->mType) &&
(tk->mIdent.LowerCaseEqualsLiteral("calc") ||
tk->mIdent.LowerCaseEqualsLiteral("-moz-calc"))) {
// calc() currently allows only lengths and percents inside it.
return ParseCalc(aValue, aVariantMask & VARIANT_LP);
}
UngetToken();
return false;
}
bool
CSSParserImpl::ParseCounter(nsCSSValue& aValue)
{
nsCSSUnit unit = (mToken.mIdent.LowerCaseEqualsLiteral("counter") ?
eCSSUnit_Counter : eCSSUnit_Counters);
// A non-iterative for loop to break out when an error occurs.
for (;;) {
if (!GetToken(true)) {
break;
}
if (eCSSToken_Ident != mToken.mType) {
UngetToken();
break;
}
nsRefPtr<nsCSSValue::Array> val =
nsCSSValue::Array::Create(unit == eCSSUnit_Counter ? 2 : 3);
val->Item(0).SetStringValue(mToken.mIdent, eCSSUnit_Ident);
if (eCSSUnit_Counters == unit) {
// must have a comma and then a separator string
if (!ExpectSymbol(',', true) || !GetToken(true)) {
break;
}
if (eCSSToken_String != mToken.mType) {
UngetToken();
break;
}
val->Item(1).SetStringValue(mToken.mIdent, eCSSUnit_String);
}
// get optional type
int32_t type = NS_STYLE_LIST_STYLE_DECIMAL;
if (ExpectSymbol(',', true)) {
if (!GetToken(true)) {
break;
}
nsCSSKeyword keyword;
if (eCSSToken_Ident != mToken.mType ||
(keyword = nsCSSKeywords::LookupKeyword(mToken.mIdent)) ==
eCSSKeyword_UNKNOWN ||
!nsCSSProps::FindKeyword(keyword, nsCSSProps::kListStyleKTable,
type)) {
UngetToken();
break;
}
}
int32_t typeItem = eCSSUnit_Counters == unit ? 2 : 1;
val->Item(typeItem).SetIntValue(type, eCSSUnit_Enumerated);
if (!ExpectSymbol(')', true)) {
break;
}
aValue.SetArrayValue(val, unit);
return true;
}
SkipUntil(')');
return false;
}
bool
CSSParserImpl::ParseAttr(nsCSSValue& aValue)
{
if (!GetToken(true)) {
return false;
}
nsAutoString attr;
if (eCSSToken_Ident == mToken.mType) { // attr name or namespace
nsAutoString holdIdent(mToken.mIdent);
if (ExpectSymbol('|', false)) { // namespace
int32_t nameSpaceID = GetNamespaceIdForPrefix(holdIdent);
if (nameSpaceID == kNameSpaceID_Unknown) {
return false;
}
attr.AppendInt(nameSpaceID, 10);
attr.Append(PRUnichar('|'));
if (! GetToken(false)) {
REPORT_UNEXPECTED_EOF(PEAttributeNameEOF);
return false;
}
if (eCSSToken_Ident == mToken.mType) {
attr.Append(mToken.mIdent);
}
else {
REPORT_UNEXPECTED_TOKEN(PEAttributeNameExpected);
UngetToken();
return false;
}
}
else { // no namespace
attr = holdIdent;
}
}
else if (mToken.IsSymbol('*')) { // namespace wildcard
// Wildcard namespace makes no sense here and is not allowed
REPORT_UNEXPECTED_TOKEN(PEAttributeNameExpected);
UngetToken();
return false;
}
else if (mToken.IsSymbol('|')) { // explicit NO namespace
if (! GetToken(false)) {
REPORT_UNEXPECTED_EOF(PEAttributeNameEOF);
return false;
}
if (eCSSToken_Ident == mToken.mType) {
attr.Append(mToken.mIdent);
}
else {
REPORT_UNEXPECTED_TOKEN(PEAttributeNameExpected);
UngetToken();
return false;
}
}
else {
REPORT_UNEXPECTED_TOKEN(PEAttributeNameOrNamespaceExpected);
UngetToken();
return false;
}
if (!ExpectSymbol(')', true)) {
return false;
}
aValue.SetStringValue(attr, eCSSUnit_Attr);
return true;
}
bool
CSSParserImpl::SetValueToURL(nsCSSValue& aValue, const nsString& aURL)
{
if (!mSheetPrincipal) {
NS_NOTREACHED("Codepaths that expect to parse URLs MUST pass in an "
"origin principal");
return false;
}
nsRefPtr<nsStringBuffer> buffer(nsCSSValue::BufferFromString(aURL));
// Note: urlVal retains its own reference to |buffer|.
mozilla::css::URLValue *urlVal =
new mozilla::css::URLValue(buffer, mBaseURI, mSheetURI, mSheetPrincipal);
aValue.SetURLValue(urlVal);
return true;
}
/**
* Parse the arguments of -moz-image-rect() function.
* -moz-image-rect(<uri>, <top>, <right>, <bottom>, <left>)
*/
bool
CSSParserImpl::ParseImageRect(nsCSSValue& aImage)
{
// A non-iterative for loop to break out when an error occurs.
for (;;) {
nsCSSValue newFunction;
static const uint32_t kNumArgs = 5;
nsCSSValue::Array* func =
newFunction.InitFunction(eCSSKeyword__moz_image_rect, kNumArgs);
// func->Item(0) is reserved for the function name.
nsCSSValue& url = func->Item(1);
nsCSSValue& top = func->Item(2);
nsCSSValue& right = func->Item(3);
nsCSSValue& bottom = func->Item(4);
nsCSSValue& left = func->Item(5);
nsAutoString urlString;
if (!ParseURLOrString(urlString) ||
!SetValueToURL(url, urlString) ||
!ExpectSymbol(',', true)) {
break;
}
static const int32_t VARIANT_SIDE = VARIANT_NUMBER | VARIANT_PERCENT;
if (!ParseNonNegativeVariant(top, VARIANT_SIDE, nullptr) ||
!ExpectSymbol(',', true) ||
!ParseNonNegativeVariant(right, VARIANT_SIDE, nullptr) ||
!ExpectSymbol(',', true) ||
!ParseNonNegativeVariant(bottom, VARIANT_SIDE, nullptr) ||
!ExpectSymbol(',', true) ||
!ParseNonNegativeVariant(left, VARIANT_SIDE, nullptr) ||
!ExpectSymbol(')', true))
break;
aImage = newFunction;
return true;
}
SkipUntil(')');
return false;
}
// <element>: -moz-element(# <element_id> )
bool
CSSParserImpl::ParseElement(nsCSSValue& aValue)
{
// A non-iterative for loop to break out when an error occurs.
for (;;) {
if (!GetToken(true))
break;
if (mToken.mType == eCSSToken_ID) {
aValue.SetStringValue(mToken.mIdent, eCSSUnit_Element);
} else {
UngetToken();
break;
}
if (!ExpectSymbol(')', true))
break;
return true;
}
// If we detect a syntax error, we must match the opening parenthesis of the
// function with the closing parenthesis and skip all the tokens in between.
SkipUntil(')');
return false;
}
// flex: none | [ <'flex-grow'> <'flex-shrink'>? || <'flex-basis'> ]
bool
CSSParserImpl::ParseFlex()
{
// First check for inherit / initial
nsCSSValue tmpVal;
if (ParseVariant(tmpVal, VARIANT_INHERIT, nullptr)) {
AppendValue(eCSSProperty_flex_grow, tmpVal);
AppendValue(eCSSProperty_flex_shrink, tmpVal);
AppendValue(eCSSProperty_flex_basis, tmpVal);
return true;
}
// Next, check for 'none' == '0 0 auto'
if (ParseVariant(tmpVal, VARIANT_NONE, nullptr)) {
AppendValue(eCSSProperty_flex_grow, nsCSSValue(0.0f, eCSSUnit_Number));
AppendValue(eCSSProperty_flex_shrink, nsCSSValue(0.0f, eCSSUnit_Number));
AppendValue(eCSSProperty_flex_basis, nsCSSValue(eCSSUnit_Auto));
return true;
}
// OK, try parsing our value as individual per-subproperty components:
// [ <'flex-grow'> <'flex-shrink'>? || <'flex-basis'> ]
// Each subproperty has a default value that it takes when it's omitted in a
// "flex" shorthand value. These default values are *only* for the shorthand
// syntax -- they're distinct from the subproperties' own initial values. We
// start with each subproperty at its default, as if we had "flex: 1 1 0%".
nsCSSValue flexGrow(1.0f, eCSSUnit_Number);
nsCSSValue flexShrink(1.0f, eCSSUnit_Number);
nsCSSValue flexBasis(0.0f, eCSSUnit_Percent);
// OVERVIEW OF PARSING STRATEGY:
// =============================
// a) Parse the first component as either flex-basis or flex-grow.
// b) If it wasn't flex-grow, parse the _next_ component as flex-grow.
// c) Now we've just parsed flex-grow -- so try parsing the next thing as
// flex-shrink.
// d) Finally: If we didn't get flex-basis at the beginning, try to parse
// it now, at the end.
//
// More details in each section below.
uint32_t flexBasisVariantMask =
(nsCSSProps::ParserVariant(eCSSProperty_flex_basis) & ~(VARIANT_INHERIT));
// (a) Parse first component. It can be either be a 'flex-basis' value or a
// 'flex-grow' value, so we use the flex-basis-specific variant mask, along
// with VARIANT_NUMBER to accept 'flex-grow' values.
//
// NOTE: if we encounter unitless 0 here, we *must* interpret it as a
// 'flex-grow' value (a number), *not* as a 'flex-basis' value (a length).
// Conveniently, that's the behavior this combined variant-mask gives us --
// it'll treat unitless 0 as a number. The flexbox spec requires this:
// "a unitless zero that is not already preceded by two flex factors must be
// interpreted as a flex factor.
if (!ParseNonNegativeVariant(tmpVal, flexBasisVariantMask | VARIANT_NUMBER,
nsCSSProps::kWidthKTable)) {
// First component was not a valid flex-basis or flex-grow value. Fail.
return false;
}
// Record what we just parsed as either flex-basis or flex-grow:
bool wasFirstComponentFlexBasis = (tmpVal.GetUnit() != eCSSUnit_Number);
(wasFirstComponentFlexBasis ? flexBasis : flexGrow) = tmpVal;
// (b) If we didn't get flex-grow yet, parse _next_ component as flex-grow.
bool doneParsing = false;
if (wasFirstComponentFlexBasis) {
if (ParseNonNegativeVariant(tmpVal, VARIANT_NUMBER, nullptr)) {
flexGrow = tmpVal;
} else {
// Failed to parse anything after our flex-basis -- that's fine. We can
// skip the remaining parsing.
doneParsing = true;
}
}
if (!doneParsing) {
// (c) OK -- the last thing we parsed was flex-grow, so look for a
// flex-shrink in the next position.
if (ParseNonNegativeVariant(tmpVal, VARIANT_NUMBER, nullptr)) {
flexShrink = tmpVal;
}
// d) Finally: If we didn't get flex-basis at the beginning, try to parse
// it now, at the end.
//
// NOTE: If we encounter unitless 0 in this final position, we'll parse it
// as a 'flex-basis' value. That's OK, because we know it must have
// been "preceded by 2 flex factors" (justification below), which gets us
// out of the spec's requirement of otherwise having to treat unitless 0
// as a flex factor.
//
// JUSTIFICATION: How do we know that a unitless 0 here must have been
// preceded by 2 flex factors? Well, suppose we had a unitless 0 that
// was preceded by only 1 flex factor. Then, we would have already
// accepted this unitless 0 as the 'flex-shrink' value, up above (since
// it's a valid flex-shrink value), and we'd have moved on to the next
// token (if any). And of course, if we instead had a unitless 0 preceded
// by *no* flex factors (if it were the first token), we would've already
// parsed it in our very first call to ParseNonNegativeVariant(). So, any
// unitless 0 encountered here *must* have been preceded by 2 flex factors.
if (!wasFirstComponentFlexBasis &&
ParseNonNegativeVariant(tmpVal, flexBasisVariantMask,
nsCSSProps::kWidthKTable)) {
flexBasis = tmpVal;
}
}
AppendValue(eCSSProperty_flex_grow, flexGrow);
AppendValue(eCSSProperty_flex_shrink, flexShrink);
AppendValue(eCSSProperty_flex_basis, flexBasis);
return true;
}
// <color-stop> : <color> [ <percentage> | <length> ]?
bool
CSSParserImpl::ParseColorStop(nsCSSValueGradient* aGradient)
{
nsCSSValueGradientStop* stop = aGradient->mStops.AppendElement();
if (!ParseVariant(stop->mColor, VARIANT_COLOR, nullptr)) {
return false;
}
// Stop positions do not have to fall between the starting-point and
// ending-point, so we don't use ParseNonNegativeVariant.
if (!ParseVariant(stop->mLocation, VARIANT_LP | VARIANT_CALC, nullptr)) {
stop->mLocation.SetNoneValue();
}
return true;
}
// <gradient>
// : linear-gradient( <linear-gradient-line>? <color-stops> ')'
// | radial-gradient( <radial-gradient-line>? <color-stops> ')'
//
// <linear-gradient-line> : [ to [left | right] || [top | bottom] ] ,
// | <legacy-gradient-line>
// <radial-gradient-line> : [ <shape> || <size> ] [ at <position> ]? ,
// | [ at <position> ] ,
// | <legacy-gradient-line>? <legacy-shape-size>?
// <shape> : circle | ellipse
// <size> : closest-side | closest-corner | farthest-side | farthest-corner
// | <length> | [<length> | <percentage>]{2}
//
// <legacy-gradient-line> : [ <position> || <angle>] ,
//
// <legacy-shape-size> : [ <shape> || <legacy-size> ] ,
// <legacy-size> : closest-side | closest-corner | farthest-side
// | farthest-corner | contain | cover
//
// <color-stops> : <color-stop> , <color-stop> [, <color-stop>]*
bool
CSSParserImpl::ParseLinearGradient(nsCSSValue& aValue, bool aIsRepeating,
bool aIsLegacy)
{
nsRefPtr<nsCSSValueGradient> cssGradient
= new nsCSSValueGradient(false, aIsRepeating);
if (!GetToken(true)) {
return false;
}
if (mToken.mType == eCSSToken_Ident &&
mToken.mIdent.LowerCaseEqualsLiteral("to")) {
// "to" syntax doesn't allow explicit "center"
if (!ParseBoxPositionValues(cssGradient->mBgPos, false, false)) {
SkipUntil(')');
return false;
}
// [ to [left | right] || [top | bottom] ] ,
const nsCSSValue& xValue = cssGradient->mBgPos.mXValue;
const nsCSSValue& yValue = cssGradient->mBgPos.mYValue;
if (xValue.GetUnit() != eCSSUnit_Enumerated ||
!(xValue.GetIntValue() & (NS_STYLE_BG_POSITION_LEFT |
NS_STYLE_BG_POSITION_CENTER |
NS_STYLE_BG_POSITION_RIGHT)) ||
yValue.GetUnit() != eCSSUnit_Enumerated ||
!(yValue.GetIntValue() & (NS_STYLE_BG_POSITION_TOP |
NS_STYLE_BG_POSITION_CENTER |
NS_STYLE_BG_POSITION_BOTTOM))) {
SkipUntil(')');
return false;
}
if (!ExpectSymbol(',', true)) {
SkipUntil(')');
return false;
}
return ParseGradientColorStops(cssGradient, aValue);
}
if (!aIsLegacy) {
UngetToken();
// <angle> ,
if (ParseVariant(cssGradient->mAngle, VARIANT_ANGLE, nullptr) &&
!ExpectSymbol(',', true)) {
SkipUntil(')');
return false;
}
return ParseGradientColorStops(cssGradient, aValue);
}
nsCSSTokenType ty = mToken.mType;
nsString id = mToken.mIdent;
UngetToken();
// <legacy-gradient-line>
bool haveGradientLine = IsLegacyGradientLine(ty, id);
if (haveGradientLine) {
cssGradient->mIsLegacySyntax = true;
bool haveAngle =
ParseVariant(cssGradient->mAngle, VARIANT_ANGLE, nullptr);
// if we got an angle, we might now have a comma, ending the gradient-line
if (!haveAngle || !ExpectSymbol(',', true)) {
if (!ParseBoxPositionValues(cssGradient->mBgPos, false)) {
SkipUntil(')');
return false;
}
if (!ExpectSymbol(',', true) &&
// if we didn't already get an angle, we might have one now,
// otherwise it's an error
(haveAngle ||
!ParseVariant(cssGradient->mAngle, VARIANT_ANGLE, nullptr) ||
// now we better have a comma
!ExpectSymbol(',', true))) {
SkipUntil(')');
return false;
}
}
}
return ParseGradientColorStops(cssGradient, aValue);
}
bool
CSSParserImpl::ParseRadialGradient(nsCSSValue& aValue, bool aIsRepeating,
bool aIsLegacy)
{
nsRefPtr<nsCSSValueGradient> cssGradient
= new nsCSSValueGradient(true, aIsRepeating);
// [ <shape> || <size> ]
bool haveShape =
ParseVariant(cssGradient->GetRadialShape(), VARIANT_KEYWORD,
nsCSSProps::kRadialGradientShapeKTable);
bool haveSize = ParseVariant(cssGradient->GetRadialSize(), VARIANT_KEYWORD,
aIsLegacy ?
nsCSSProps::kRadialGradientLegacySizeKTable :
nsCSSProps::kRadialGradientSizeKTable);
if (haveSize) {
if (!haveShape) {
// <size> <shape>
haveShape = ParseVariant(cssGradient->GetRadialShape(), VARIANT_KEYWORD,
nsCSSProps::kRadialGradientShapeKTable);
}
} else if (!aIsLegacy) {
// <length> | [<length> | <percentage>]{2}
haveSize =
ParseNonNegativeVariant(cssGradient->GetRadiusX(), VARIANT_LP, nullptr);
if (haveSize) {
// vertical extent is optional
bool haveYSize =
ParseNonNegativeVariant(cssGradient->GetRadiusY(), VARIANT_LP, nullptr);
if (!haveShape) {
nsCSSValue shapeValue;
haveShape = ParseVariant(shapeValue, VARIANT_KEYWORD,
nsCSSProps::kRadialGradientShapeKTable);
}
int32_t shape =
cssGradient->GetRadialShape().GetUnit() == eCSSUnit_Enumerated ?
cssGradient->GetRadialShape().GetIntValue() : -1;
if (haveYSize
? shape == NS_STYLE_GRADIENT_SHAPE_CIRCULAR
: cssGradient->GetRadiusX().GetUnit() == eCSSUnit_Percent ||
shape == NS_STYLE_GRADIENT_SHAPE_ELLIPTICAL) {
SkipUntil(')');
return false;
}
cssGradient->mIsExplicitSize = true;
}
}
if ((haveShape || haveSize) && ExpectSymbol(',', true)) {
// [ <shape> || <size> ] ,
return ParseGradientColorStops(cssGradient, aValue);
}
if (!GetToken(true)) {
return false;
}
if (!aIsLegacy) {
if (mToken.mType == eCSSToken_Ident &&
mToken.mIdent.LowerCaseEqualsLiteral("at")) {
// [ <shape> || <size> ]? at <position> ,
if (!ParseBoxPositionValues(cssGradient->mBgPos, false) ||
!ExpectSymbol(',', true)) {
SkipUntil(')');
return false;
}
return ParseGradientColorStops(cssGradient, aValue);
}
// <color-stops> only
UngetToken();
return ParseGradientColorStops(cssGradient, aValue);
}
MOZ_ASSERT(!cssGradient->mIsExplicitSize);
nsCSSTokenType ty = mToken.mType;
nsString id = mToken.mIdent;
UngetToken();
// <legacy-gradient-line>
bool haveGradientLine = false;
// if we already encountered a shape or size,
// we can not have a gradient-line in legacy syntax
if (!haveShape && !haveSize) {
haveGradientLine = IsLegacyGradientLine(ty, id);
}
if (haveGradientLine) {
bool haveAngle =
ParseVariant(cssGradient->mAngle, VARIANT_ANGLE, nullptr);
// if we got an angle, we might now have a comma, ending the gradient-line
if (!haveAngle || !ExpectSymbol(',', true)) {
if (!ParseBoxPositionValues(cssGradient->mBgPos, false)) {
SkipUntil(')');
return false;
}
if (!ExpectSymbol(',', true) &&
// if we didn't already get an angle, we might have one now,
// otherwise it's an error
(haveAngle ||
!ParseVariant(cssGradient->mAngle, VARIANT_ANGLE, nullptr) ||
// now we better have a comma
!ExpectSymbol(',', true))) {
SkipUntil(')');
return false;
}
}
if (cssGradient->mAngle.GetUnit() != eCSSUnit_None) {
cssGradient->mIsLegacySyntax = true;
}
}
// radial gradients might have a shape and size here for legacy syntax
if (!haveShape && !haveSize) {
haveShape =
ParseVariant(cssGradient->GetRadialShape(), VARIANT_KEYWORD,
nsCSSProps::kRadialGradientShapeKTable);
haveSize =
ParseVariant(cssGradient->GetRadialSize(), VARIANT_KEYWORD,
nsCSSProps::kRadialGradientLegacySizeKTable);
// could be in either order
if (!haveShape) {
haveShape =
ParseVariant(cssGradient->GetRadialShape(), VARIANT_KEYWORD,
nsCSSProps::kRadialGradientShapeKTable);
}
}
if ((haveShape || haveSize) && !ExpectSymbol(',', true)) {
SkipUntil(')');
return false;
}
return ParseGradientColorStops(cssGradient, aValue);
}
bool
CSSParserImpl::IsLegacyGradientLine(const nsCSSTokenType& aType,
const nsString& aId)
{
// N.B. ParseBoxPositionValues is not guaranteed to put back
// everything it scanned if it fails, so we must only call it
// if there is no alternative to consuming a <box-position>.
// ParseVariant, as used here, will either succeed and consume
// a single token, or fail and consume none, so we can be more
// cavalier about calling it.
bool haveGradientLine = false;
switch (aType) {
case eCSSToken_Percentage:
case eCSSToken_Number:
case eCSSToken_Dimension:
haveGradientLine = true;
break;
case eCSSToken_Function:
if (aId.LowerCaseEqualsLiteral("calc") ||
aId.LowerCaseEqualsLiteral("-moz-calc")) {
haveGradientLine = true;
break;
}
// fall through
case eCSSToken_ID:
case eCSSToken_Hash:
// this is a color
break;
case eCSSToken_Ident: {
// This is only a gradient line if it's a box position keyword.
nsCSSKeyword kw = nsCSSKeywords::LookupKeyword(aId);
int32_t junk;
if (kw != eCSSKeyword_UNKNOWN &&
nsCSSProps::FindKeyword(kw, nsCSSProps::kBackgroundPositionKTable,
junk)) {
haveGradientLine = true;
}
break;
}
default:
// error
break;
}
return haveGradientLine;
}
bool
CSSParserImpl::ParseGradientColorStops(nsCSSValueGradient* aGradient,
nsCSSValue& aValue)
{
// At least two color stops are required
if (!ParseColorStop(aGradient) ||
!ExpectSymbol(',', true) ||
!ParseColorStop(aGradient)) {
SkipUntil(')');
return false;
}
// Additional color stops
while (ExpectSymbol(',', true)) {
if (!ParseColorStop(aGradient)) {
SkipUntil(')');
return false;
}
}
if (!ExpectSymbol(')', true)) {
SkipUntil(')');
return false;
}
aValue.SetGradientValue(aGradient);
return true;
}
int32_t
CSSParserImpl::ParseChoice(nsCSSValue aValues[],
const nsCSSProperty aPropIDs[], int32_t aNumIDs)
{
int32_t found = 0;
nsAutoParseCompoundProperty compound(this);
int32_t loop;
for (loop = 0; loop < aNumIDs; loop++) {
// Try each property parser in order
int32_t hadFound = found;
int32_t index;
for (index = 0; index < aNumIDs; index++) {
int32_t bit = 1 << index;
if ((found & bit) == 0) {
if (ParseSingleValueProperty(aValues[index], aPropIDs[index])) {
found |= bit;
// It's more efficient to break since it will reset |hadFound|
// to |found|. Furthermore, ParseListStyle depends on our going
// through the properties in order for each value..
break;
}
}
}
if (found == hadFound) { // found nothing new
break;
}
}
if (0 < found) {
if (1 == found) { // only first property
if (eCSSUnit_Inherit == aValues[0].GetUnit()) { // one inherit, all inherit
for (loop = 1; loop < aNumIDs; loop++) {
aValues[loop].SetInheritValue();
}
found = ((1 << aNumIDs) - 1);
}
else if (eCSSUnit_Initial == aValues[0].GetUnit()) { // one initial, all initial
for (loop = 1; loop < aNumIDs; loop++) {
aValues[loop].SetInitialValue();
}
found = ((1 << aNumIDs) - 1);
}
}
else { // more than one value, verify no inherits or initials
for (loop = 0; loop < aNumIDs; loop++) {
if (eCSSUnit_Inherit == aValues[loop].GetUnit()) {
found = -1;
break;
}
else if (eCSSUnit_Initial == aValues[loop].GetUnit()) {
found = -1;
break;
}
}
}
}
return found;
}
void
CSSParserImpl::AppendValue(nsCSSProperty aPropID, const nsCSSValue& aValue)
{
mTempData.AddLonghandProperty(aPropID, aValue);
}
/**
* Parse a "box" property. Box properties have 1 to 4 values. When less
* than 4 values are provided a standard mapping is used to replicate
* existing values.
*/
bool
CSSParserImpl::ParseBoxProperties(const nsCSSProperty aPropIDs[])
{
// Get up to four values for the property
int32_t count = 0;
nsCSSRect result;
NS_FOR_CSS_SIDES (index) {
if (! ParseSingleValueProperty(result.*(nsCSSRect::sides[index]),
aPropIDs[index])) {
break;
}
count++;
}
if ((count == 0) || (false == ExpectEndProperty())) {
return false;
}
if (1 < count) { // verify no more than single inherit or initial
NS_FOR_CSS_SIDES (index) {
nsCSSUnit unit = (result.*(nsCSSRect::sides[index])).GetUnit();
if (eCSSUnit_Inherit == unit || eCSSUnit_Initial == unit) {
return false;
}
}
}
// Provide missing values by replicating some of the values found
switch (count) {
case 1: // Make right == top
result.mRight = result.mTop;
case 2: // Make bottom == top
result.mBottom = result.mTop;
case 3: // Make left == right
result.mLeft = result.mRight;
}
NS_FOR_CSS_SIDES (index) {
AppendValue(aPropIDs[index], result.*(nsCSSRect::sides[index]));
}
return true;
}
// Similar to ParseBoxProperties, except there is only one property
// with the result as its value, not four. Requires values be nonnegative.
bool
CSSParserImpl::ParseGroupedBoxProperty(int32_t aVariantMask,
/** outparam */ nsCSSValue& aValue)
{
nsCSSRect& result = aValue.SetRectValue();
int32_t count = 0;
NS_FOR_CSS_SIDES (index) {
if (!ParseNonNegativeVariant(result.*(nsCSSRect::sides[index]),
aVariantMask, nullptr)) {
break;
}
count++;
}
if (count == 0) {
return false;
}
// Provide missing values by replicating some of the values found
switch (count) {
case 1: // Make right == top
result.mRight = result.mTop;
case 2: // Make bottom == top
result.mBottom = result.mTop;
case 3: // Make left == right
result.mLeft = result.mRight;
}
return true;
}
bool
CSSParserImpl::ParseDirectionalBoxProperty(nsCSSProperty aProperty,
int32_t aSourceType)
{
const nsCSSProperty* subprops = nsCSSProps::SubpropertyEntryFor(aProperty);
NS_ASSERTION(subprops[3] == eCSSProperty_UNKNOWN,
"not box property with physical vs. logical cascading");
nsCSSValue value;
if (!ParseSingleValueProperty(value, subprops[0]) ||
!ExpectEndProperty())
return false;
AppendValue(subprops[0], value);
nsCSSValue typeVal(aSourceType, eCSSUnit_Enumerated);
AppendValue(subprops[1], typeVal);
AppendValue(subprops[2], typeVal);
return true;
}
bool
CSSParserImpl::ParseBoxCornerRadius(nsCSSProperty aPropID)
{
nsCSSValue dimenX, dimenY;
// required first value
if (! ParseNonNegativeVariant(dimenX, VARIANT_HLP | VARIANT_CALC, nullptr))
return false;
// optional second value (forbidden if first value is inherit/initial)
if (dimenX.GetUnit() != eCSSUnit_Inherit &&
dimenX.GetUnit() != eCSSUnit_Initial) {
ParseNonNegativeVariant(dimenY, VARIANT_LP | VARIANT_CALC, nullptr);
}
if (dimenX == dimenY || dimenY.GetUnit() == eCSSUnit_Null) {
AppendValue(aPropID, dimenX);
} else {
nsCSSValue value;
value.SetPairValue(dimenX, dimenY);
AppendValue(aPropID, value);
}
return true;
}
bool
CSSParserImpl::ParseBoxCornerRadii(const nsCSSProperty aPropIDs[])
{
// Rectangles are used as scratch storage.
// top => top-left, right => top-right,
// bottom => bottom-right, left => bottom-left.
nsCSSRect dimenX, dimenY;
int32_t countX = 0, countY = 0;
NS_FOR_CSS_SIDES (side) {
if (! ParseNonNegativeVariant(dimenX.*nsCSSRect::sides[side],
(side > 0 ? 0 : VARIANT_INHERIT) |
VARIANT_LP | VARIANT_CALC,
nullptr))
break;
countX++;
}
if (countX == 0)
return false;
if (ExpectSymbol('/', true)) {
NS_FOR_CSS_SIDES (side) {
if (! ParseNonNegativeVariant(dimenY.*nsCSSRect::sides[side],
VARIANT_LP | VARIANT_CALC, nullptr))
break;
countY++;
}
if (countY == 0)
return false;
}
if (!ExpectEndProperty())
return false;
// if 'initial' or 'inherit' was used, it must be the only value
if (countX > 1 || countY > 0) {
nsCSSUnit unit = dimenX.mTop.GetUnit();
if (eCSSUnit_Inherit == unit || eCSSUnit_Initial == unit)
return false;
}
// if we have no Y-values, use the X-values
if (countY == 0) {
dimenY = dimenX;
countY = countX;
}
// Provide missing values by replicating some of the values found
switch (countX) {
case 1: dimenX.mRight = dimenX.mTop; // top-right same as top-left, and
case 2: dimenX.mBottom = dimenX.mTop; // bottom-right same as top-left, and
case 3: dimenX.mLeft = dimenX.mRight; // bottom-left same as top-right
}
switch (countY) {
case 1: dimenY.mRight = dimenY.mTop; // top-right same as top-left, and
case 2: dimenY.mBottom = dimenY.mTop; // bottom-right same as top-left, and
case 3: dimenY.mLeft = dimenY.mRight; // bottom-left same as top-right
}
NS_FOR_CSS_SIDES(side) {
nsCSSValue& x = dimenX.*nsCSSRect::sides[side];
nsCSSValue& y = dimenY.*nsCSSRect::sides[side];
if (x == y) {
AppendValue(aPropIDs[side], x);
} else {
nsCSSValue pair;
pair.SetPairValue(x, y);
AppendValue(aPropIDs[side], pair);
}
}
return true;
}
// These must be in CSS order (top,right,bottom,left) for indexing to work
static const nsCSSProperty kBorderStyleIDs[] = {
eCSSProperty_border_top_style,
eCSSProperty_border_right_style_value,
eCSSProperty_border_bottom_style,
eCSSProperty_border_left_style_value
};
static const nsCSSProperty kBorderWidthIDs[] = {
eCSSProperty_border_top_width,
eCSSProperty_border_right_width_value,
eCSSProperty_border_bottom_width,
eCSSProperty_border_left_width_value
};
static const nsCSSProperty kBorderColorIDs[] = {
eCSSProperty_border_top_color,
eCSSProperty_border_right_color_value,
eCSSProperty_border_bottom_color,
eCSSProperty_border_left_color_value
};
static const nsCSSProperty kBorderRadiusIDs[] = {
eCSSProperty_border_top_left_radius,
eCSSProperty_border_top_right_radius,
eCSSProperty_border_bottom_right_radius,
eCSSProperty_border_bottom_left_radius
};
static const nsCSSProperty kOutlineRadiusIDs[] = {
eCSSProperty__moz_outline_radius_topLeft,
eCSSProperty__moz_outline_radius_topRight,
eCSSProperty__moz_outline_radius_bottomRight,
eCSSProperty__moz_outline_radius_bottomLeft
};
bool
CSSParserImpl::ParseProperty(nsCSSProperty aPropID)
{
// Can't use AutoRestore<bool> because it's a bitfield.
NS_ABORT_IF_FALSE(!mHashlessColorQuirk,
"hashless color quirk should not be set");
NS_ABORT_IF_FALSE(!mUnitlessLengthQuirk,
"unitless length quirk should not be set");
if (mNavQuirkMode) {
mHashlessColorQuirk =
nsCSSProps::PropHasFlags(aPropID, CSS_PROPERTY_HASHLESS_COLOR_QUIRK);
mUnitlessLengthQuirk =
nsCSSProps::PropHasFlags(aPropID, CSS_PROPERTY_UNITLESS_LENGTH_QUIRK);
}
NS_ASSERTION(aPropID < eCSSProperty_COUNT, "index out of range");
bool result;
switch (nsCSSProps::PropertyParseType(aPropID)) {
case CSS_PROPERTY_PARSE_INACCESSIBLE: {
// The user can't use these
REPORT_UNEXPECTED(PEInaccessibleProperty2);
result = false;
break;
}
case CSS_PROPERTY_PARSE_FUNCTION: {
result = ParsePropertyByFunction(aPropID);
break;
}
case CSS_PROPERTY_PARSE_VALUE: {
result = false;
nsCSSValue value;
if (ParseSingleValueProperty(value, aPropID)) {
if (ExpectEndProperty()) {
AppendValue(aPropID, value);
result = true;
}
// XXX Report errors?
}
// XXX Report errors?
break;
}
case CSS_PROPERTY_PARSE_VALUE_LIST: {
result = ParseValueList(aPropID);
break;
}
default: {
result = false;
NS_ABORT_IF_FALSE(false,
"Property's flags field in nsCSSPropList.h is missing "
"one of the CSS_PROPERTY_PARSE_* constants");
break;
}
}
if (mNavQuirkMode) {
mHashlessColorQuirk = false;
mUnitlessLengthQuirk = false;
}
return result;
}
bool
CSSParserImpl::ParsePropertyByFunction(nsCSSProperty aPropID)
{
switch (aPropID) { // handle shorthand or multiple properties
case eCSSProperty_background:
return ParseBackground();
case eCSSProperty_background_repeat:
return ParseBackgroundRepeat();
case eCSSProperty_background_position:
return ParseBackgroundPosition();
case eCSSProperty_background_size:
return ParseBackgroundSize();
case eCSSProperty_border:
return ParseBorderSide(kBorderTopIDs, true);
case eCSSProperty_border_color:
return ParseBorderColor();
case eCSSProperty_border_spacing:
return ParseBorderSpacing();
case eCSSProperty_border_style:
return ParseBorderStyle();
case eCSSProperty_border_bottom:
return ParseBorderSide(kBorderBottomIDs, false);
case eCSSProperty_border_end:
return ParseDirectionalBorderSide(kBorderEndIDs,
NS_BOXPROP_SOURCE_LOGICAL);
case eCSSProperty_border_left:
return ParseDirectionalBorderSide(kBorderLeftIDs,
NS_BOXPROP_SOURCE_PHYSICAL);
case eCSSProperty_border_right:
return ParseDirectionalBorderSide(kBorderRightIDs,
NS_BOXPROP_SOURCE_PHYSICAL);
case eCSSProperty_border_start:
return ParseDirectionalBorderSide(kBorderStartIDs,
NS_BOXPROP_SOURCE_LOGICAL);
case eCSSProperty_border_top:
return ParseBorderSide(kBorderTopIDs, false);
case eCSSProperty_border_bottom_colors:
case eCSSProperty_border_left_colors:
case eCSSProperty_border_right_colors:
case eCSSProperty_border_top_colors:
return ParseBorderColors(aPropID);
case eCSSProperty_border_image_slice:
return ParseBorderImageSlice(true, nullptr);
case eCSSProperty_border_image_width:
return ParseBorderImageWidth(true);
case eCSSProperty_border_image_outset:
return ParseBorderImageOutset(true);
case eCSSProperty_border_image_repeat:
return ParseBorderImageRepeat(true);
case eCSSProperty_border_image:
return ParseBorderImage();
case eCSSProperty_border_width:
return ParseBorderWidth();
case eCSSProperty_border_end_color:
return ParseDirectionalBoxProperty(eCSSProperty_border_end_color,
NS_BOXPROP_SOURCE_LOGICAL);
case eCSSProperty_border_left_color:
return ParseDirectionalBoxProperty(eCSSProperty_border_left_color,
NS_BOXPROP_SOURCE_PHYSICAL);
case eCSSProperty_border_right_color:
return ParseDirectionalBoxProperty(eCSSProperty_border_right_color,
NS_BOXPROP_SOURCE_PHYSICAL);
case eCSSProperty_border_start_color:
return ParseDirectionalBoxProperty(eCSSProperty_border_start_color,
NS_BOXPROP_SOURCE_LOGICAL);
case eCSSProperty_border_end_width:
return ParseDirectionalBoxProperty(eCSSProperty_border_end_width,
NS_BOXPROP_SOURCE_LOGICAL);
case eCSSProperty_border_left_width:
return ParseDirectionalBoxProperty(eCSSProperty_border_left_width,
NS_BOXPROP_SOURCE_PHYSICAL);
case eCSSProperty_border_right_width:
return ParseDirectionalBoxProperty(eCSSProperty_border_right_width,
NS_BOXPROP_SOURCE_PHYSICAL);
case eCSSProperty_border_start_width:
return ParseDirectionalBoxProperty(eCSSProperty_border_start_width,
NS_BOXPROP_SOURCE_LOGICAL);
case eCSSProperty_border_end_style:
return ParseDirectionalBoxProperty(eCSSProperty_border_end_style,
NS_BOXPROP_SOURCE_LOGICAL);
case eCSSProperty_border_left_style:
return ParseDirectionalBoxProperty(eCSSProperty_border_left_style,
NS_BOXPROP_SOURCE_PHYSICAL);
case eCSSProperty_border_right_style:
return ParseDirectionalBoxProperty(eCSSProperty_border_right_style,
NS_BOXPROP_SOURCE_PHYSICAL);
case eCSSProperty_border_start_style:
return ParseDirectionalBoxProperty(eCSSProperty_border_start_style,
NS_BOXPROP_SOURCE_LOGICAL);
case eCSSProperty_border_radius:
return ParseBoxCornerRadii(kBorderRadiusIDs);
case eCSSProperty__moz_outline_radius:
return ParseBoxCornerRadii(kOutlineRadiusIDs);
case eCSSProperty_border_top_left_radius:
case eCSSProperty_border_top_right_radius:
case eCSSProperty_border_bottom_right_radius:
case eCSSProperty_border_bottom_left_radius:
case eCSSProperty__moz_outline_radius_topLeft:
case eCSSProperty__moz_outline_radius_topRight:
case eCSSProperty__moz_outline_radius_bottomRight:
case eCSSProperty__moz_outline_radius_bottomLeft:
return ParseBoxCornerRadius(aPropID);
case eCSSProperty_box_shadow:
case eCSSProperty_text_shadow:
return ParseShadowList(aPropID);
case eCSSProperty_clip:
return ParseRect(eCSSProperty_clip);
case eCSSProperty__moz_columns:
return ParseColumns();
case eCSSProperty__moz_column_rule:
return ParseBorderSide(kColumnRuleIDs, false);
case eCSSProperty_content:
return ParseContent();
case eCSSProperty_counter_increment:
case eCSSProperty_counter_reset:
return ParseCounterData(aPropID);
case eCSSProperty_cursor:
return ParseCursor();
case eCSSProperty_flex:
return ParseFlex();
case eCSSProperty_font:
return ParseFont();
case eCSSProperty_image_region:
return ParseRect(eCSSProperty_image_region);
case eCSSProperty_list_style:
return ParseListStyle();
case eCSSProperty_margin:
return ParseMargin();
case eCSSProperty_margin_end:
return ParseDirectionalBoxProperty(eCSSProperty_margin_end,
NS_BOXPROP_SOURCE_LOGICAL);
case eCSSProperty_margin_left:
return ParseDirectionalBoxProperty(eCSSProperty_margin_left,
NS_BOXPROP_SOURCE_PHYSICAL);
case eCSSProperty_margin_right:
return ParseDirectionalBoxProperty(eCSSProperty_margin_right,
NS_BOXPROP_SOURCE_PHYSICAL);
case eCSSProperty_margin_start:
return ParseDirectionalBoxProperty(eCSSProperty_margin_start,
NS_BOXPROP_SOURCE_LOGICAL);
case eCSSProperty_outline:
return ParseOutline();
case eCSSProperty_overflow:
return ParseOverflow();
case eCSSProperty_padding:
return ParsePadding();
case eCSSProperty_padding_end:
return ParseDirectionalBoxProperty(eCSSProperty_padding_end,
NS_BOXPROP_SOURCE_LOGICAL);
case eCSSProperty_padding_left:
return ParseDirectionalBoxProperty(eCSSProperty_padding_left,
NS_BOXPROP_SOURCE_PHYSICAL);
case eCSSProperty_padding_right:
return ParseDirectionalBoxProperty(eCSSProperty_padding_right,
NS_BOXPROP_SOURCE_PHYSICAL);
case eCSSProperty_padding_start:
return ParseDirectionalBoxProperty(eCSSProperty_padding_start,
NS_BOXPROP_SOURCE_LOGICAL);
case eCSSProperty_quotes:
return ParseQuotes();
case eCSSProperty_size:
return ParseSize();
case eCSSProperty_text_decoration:
return ParseTextDecoration();
case eCSSProperty_transform:
return ParseTransform(false);
case eCSSProperty__moz_transform:
return ParseTransform(true);
case eCSSProperty_transform_origin:
return ParseTransformOrigin(false);
case eCSSProperty_perspective_origin:
return ParseTransformOrigin(true);
case eCSSProperty_transition:
return ParseTransition();
case eCSSProperty_animation:
return ParseAnimation();
case eCSSProperty_transition_property:
return ParseTransitionProperty();
case eCSSProperty_fill:
case eCSSProperty_stroke:
return ParsePaint(aPropID);
case eCSSProperty_stroke_dasharray:
return ParseDasharray();
case eCSSProperty_marker:
return ParseMarker();
case eCSSProperty_paint_order:
return ParsePaintOrder();
default:
NS_ABORT_IF_FALSE(false, "should not be called");
return false;
}
}
// Bits used in determining which background position info we have
#define BG_CENTER NS_STYLE_BG_POSITION_CENTER
#define BG_TOP NS_STYLE_BG_POSITION_TOP
#define BG_BOTTOM NS_STYLE_BG_POSITION_BOTTOM
#define BG_LEFT NS_STYLE_BG_POSITION_LEFT
#define BG_RIGHT NS_STYLE_BG_POSITION_RIGHT
#define BG_CTB (BG_CENTER | BG_TOP | BG_BOTTOM)
#define BG_TB (BG_TOP | BG_BOTTOM)
#define BG_CLR (BG_CENTER | BG_LEFT | BG_RIGHT)
#define BG_LR (BG_LEFT | BG_RIGHT)
bool
CSSParserImpl::ParseSingleValueProperty(nsCSSValue& aValue,
nsCSSProperty aPropID)
{
if (aPropID == eCSSPropertyExtra_x_none_value) {
return ParseVariant(aValue, VARIANT_NONE | VARIANT_INHERIT, nullptr);
}
if (aPropID == eCSSPropertyExtra_x_auto_value) {
return ParseVariant(aValue, VARIANT_AUTO | VARIANT_INHERIT, nullptr);
}
if (aPropID < 0 || aPropID >= eCSSProperty_COUNT_no_shorthands) {
NS_ABORT_IF_FALSE(false, "not a single value property");
return false;
}
if (nsCSSProps::PropHasFlags(aPropID, CSS_PROPERTY_VALUE_PARSER_FUNCTION)) {
switch (aPropID) {
case eCSSProperty_font_family:
return ParseFamily(aValue);
case eCSSProperty_font_synthesis:
return ParseFontSynthesis(aValue);
case eCSSProperty_font_variant_alternates:
return ParseFontVariantAlternates(aValue);
case eCSSProperty_font_variant_east_asian:
return ParseFontVariantEastAsian(aValue);
case eCSSProperty_font_variant_ligatures:
return ParseFontVariantLigatures(aValue);
case eCSSProperty_font_variant_numeric:
return ParseFontVariantNumeric(aValue);
case eCSSProperty_font_feature_settings:
return ParseFontFeatureSettings(aValue);
case eCSSProperty_font_weight:
return ParseFontWeight(aValue);
case eCSSProperty_marks:
return ParseMarks(aValue);
case eCSSProperty_text_decoration_line:
return ParseTextDecorationLine(aValue);
case eCSSProperty_text_overflow:
return ParseTextOverflow(aValue);
default:
NS_ABORT_IF_FALSE(false, "should not reach here");
return false;
}
}
uint32_t variant = nsCSSProps::ParserVariant(aPropID);
if (variant == 0) {
NS_ABORT_IF_FALSE(false, "not a single value property");
return false;
}
// We only allow 'script-level' when unsafe rules are enabled, because
// otherwise it could interfere with rulenode optimizations if used in
// a non-MathML-enabled document.
if (aPropID == eCSSProperty_script_level && !mUnsafeRulesEnabled)
return false;
const int32_t *kwtable = nsCSSProps::kKeywordTableTable[aPropID];
switch (nsCSSProps::ValueRestrictions(aPropID)) {
default:
NS_ABORT_IF_FALSE(false, "should not be reached");
case 0:
return ParseVariant(aValue, variant, kwtable);
case CSS_PROPERTY_VALUE_NONNEGATIVE:
return ParseNonNegativeVariant(aValue, variant, kwtable);
case CSS_PROPERTY_VALUE_AT_LEAST_ONE:
return ParseOneOrLargerVariant(aValue, variant, kwtable);
}
}
// nsFont::EnumerateFamilies callback for ParseFontDescriptorValue
struct MOZ_STACK_CLASS ExtractFirstFamilyData {
nsAutoString mFamilyName;
bool mGood;
ExtractFirstFamilyData() : mFamilyName(), mGood(false) {}
};
static bool
ExtractFirstFamily(const nsString& aFamily,
bool aGeneric,
void* aData)
{
ExtractFirstFamilyData* realData = (ExtractFirstFamilyData*) aData;
if (aGeneric || realData->mFamilyName.Length() > 0) {
realData->mGood = false;
return false;
}
realData->mFamilyName.Assign(aFamily);
realData->mGood = true;
return true;
}
// font-descriptor: descriptor ':' value ';'
// caller has advanced mToken to point at the descriptor
bool
CSSParserImpl::ParseFontDescriptorValue(nsCSSFontDesc aDescID,
nsCSSValue& aValue)
{
switch (aDescID) {
// These four are similar to the properties of the same name,
// possibly with more restrictions on the values they can take.
case eCSSFontDesc_Family: {
if (!ParseFamily(aValue) ||
aValue.GetUnit() != eCSSUnit_Families)
return false;
// the style parameters to the nsFont constructor are ignored,
// because it's only being used to call EnumerateFamilies
nsAutoString valueStr;
aValue.GetStringValue(valueStr);
nsFont font(valueStr, 0, 0, 0, 0, 0, 0);
ExtractFirstFamilyData dat;
font.EnumerateFamilies(ExtractFirstFamily, (void*) &dat);
if (!dat.mGood)
return false;
aValue.SetStringValue(dat.mFamilyName, eCSSUnit_String);
return true;
}
case eCSSFontDesc_Style:
// property is VARIANT_HMK|VARIANT_SYSFONT
return ParseVariant(aValue, VARIANT_KEYWORD | VARIANT_NORMAL,
nsCSSProps::kFontStyleKTable);
case eCSSFontDesc_Weight:
return (ParseFontWeight(aValue) &&
aValue.GetUnit() != eCSSUnit_Inherit &&
aValue.GetUnit() != eCSSUnit_Initial &&
(aValue.GetUnit() != eCSSUnit_Enumerated ||
(aValue.GetIntValue() != NS_STYLE_FONT_WEIGHT_BOLDER &&
aValue.GetIntValue() != NS_STYLE_FONT_WEIGHT_LIGHTER)));
case eCSSFontDesc_Stretch:
// property is VARIANT_HK|VARIANT_SYSFONT
return ParseVariant(aValue, VARIANT_KEYWORD,
nsCSSProps::kFontStretchKTable);
// These two are unique to @font-face and have their own special grammar.
case eCSSFontDesc_Src:
return ParseFontSrc(aValue);
case eCSSFontDesc_UnicodeRange:
return ParseFontRanges(aValue);
case eCSSFontDesc_FontFeatureSettings:
return ParseFontFeatureSettings(aValue);
case eCSSFontDesc_FontLanguageOverride:
return ParseVariant(aValue, VARIANT_NORMAL | VARIANT_STRING, nullptr);
case eCSSFontDesc_UNKNOWN:
case eCSSFontDesc_COUNT:
NS_NOTREACHED("bad nsCSSFontDesc code");
}
// explicitly do NOT have a default case to let the compiler
// help find missing descriptors
return false;
}
void
CSSParserImpl::InitBoxPropsAsPhysical(const nsCSSProperty *aSourceProperties)
{
nsCSSValue physical(NS_BOXPROP_SOURCE_PHYSICAL, eCSSUnit_Enumerated);
for (const nsCSSProperty *prop = aSourceProperties;
*prop != eCSSProperty_UNKNOWN; ++prop) {
AppendValue(*prop, physical);
}
}
static nsCSSValue
BoxPositionMaskToCSSValue(int32_t aMask, bool isX)
{
int32_t val = NS_STYLE_BG_POSITION_CENTER;
if (isX) {
if (aMask & BG_LEFT) {
val = NS_STYLE_BG_POSITION_LEFT;
}
else if (aMask & BG_RIGHT) {
val = NS_STYLE_BG_POSITION_RIGHT;
}
}
else {
if (aMask & BG_TOP) {
val = NS_STYLE_BG_POSITION_TOP;
}
else if (aMask & BG_BOTTOM) {
val = NS_STYLE_BG_POSITION_BOTTOM;
}
}
return nsCSSValue(val, eCSSUnit_Enumerated);
}
bool
CSSParserImpl::ParseBackground()
{
nsAutoParseCompoundProperty compound(this);
// background-color can only be set once, so it's not a list.
nsCSSValue color;
// Check first for inherit/initial.
if (ParseVariant(color, VARIANT_INHERIT, nullptr)) {
// must be alone
if (!ExpectEndProperty()) {
return false;
}
for (const nsCSSProperty* subprops =
nsCSSProps::SubpropertyEntryFor(eCSSProperty_background);
*subprops != eCSSProperty_UNKNOWN; ++subprops) {
AppendValue(*subprops, color);
}
return true;
}
nsCSSValue image, repeat, attachment, clip, origin, position, size;
BackgroundParseState state(color, image.SetListValue(),
repeat.SetPairListValue(),
attachment.SetListValue(), clip.SetListValue(),
origin.SetListValue(), position.SetListValue(),
size.SetPairListValue());
for (;;) {
if (!ParseBackgroundItem(state)) {
return false;
}
if (CheckEndProperty()) {
break;
}
// If we saw a color, this must be the last item.
if (color.GetUnit() != eCSSUnit_Null) {
REPORT_UNEXPECTED_TOKEN(PEExpectEndValue);
return false;
}
// Otherwise, a comma is mandatory.
if (!ExpectSymbol(',', true)) {
return false;
}
// Chain another entry on all the lists.
state.mImage->mNext = new nsCSSValueList;
state.mImage = state.mImage->mNext;
state.mRepeat->mNext = new nsCSSValuePairList;
state.mRepeat = state.mRepeat->mNext;
state.mAttachment->mNext = new nsCSSValueList;
state.mAttachment = state.mAttachment->mNext;
state.mClip->mNext = new nsCSSValueList;
state.mClip = state.mClip->mNext;
state.mOrigin->mNext = new nsCSSValueList;
state.mOrigin = state.mOrigin->mNext;
state.mPosition->mNext = new nsCSSValueList;
state.mPosition = state.mPosition->mNext;
state.mSize->mNext = new nsCSSValuePairList;
state.mSize = state.mSize->mNext;
}
// If we get to this point without seeing a color, provide a default.
if (color.GetUnit() == eCSSUnit_Null) {
color.SetColorValue(NS_RGBA(0,0,0,0));
}
AppendValue(eCSSProperty_background_image, image);
AppendValue(eCSSProperty_background_repeat, repeat);
AppendValue(eCSSProperty_background_attachment, attachment);
AppendValue(eCSSProperty_background_clip, clip);
AppendValue(eCSSProperty_background_origin, origin);
AppendValue(eCSSProperty_background_position, position);
AppendValue(eCSSProperty_background_size, size);
AppendValue(eCSSProperty_background_color, color);
return true;
}
// Parse one item of the background shorthand property.
bool
CSSParserImpl::ParseBackgroundItem(CSSParserImpl::BackgroundParseState& aState)
{
// Fill in the values that the shorthand will set if we don't find
// other values.
aState.mImage->mValue.SetNoneValue();
aState.mRepeat->mXValue.SetIntValue(NS_STYLE_BG_REPEAT_REPEAT,
eCSSUnit_Enumerated);
aState.mRepeat->mYValue.Reset();
aState.mAttachment->mValue.SetIntValue(NS_STYLE_BG_ATTACHMENT_SCROLL,
eCSSUnit_Enumerated);
aState.mClip->mValue.SetIntValue(NS_STYLE_BG_CLIP_BORDER,
eCSSUnit_Enumerated);
aState.mOrigin->mValue.SetIntValue(NS_STYLE_BG_ORIGIN_PADDING,
eCSSUnit_Enumerated);
nsRefPtr<nsCSSValue::Array> positionArr = nsCSSValue::Array::Create(4);
aState.mPosition->mValue.SetArrayValue(positionArr, eCSSUnit_Array);
positionArr->Item(1).SetPercentValue(0.0f);
positionArr->Item(3).SetPercentValue(0.0f);
aState.mSize->mXValue.SetAutoValue();
aState.mSize->mYValue.SetAutoValue();
bool haveColor = false,
haveImage = false,
haveRepeat = false,
haveAttach = false,
havePositionAndSize = false,
haveOrigin = false,
haveSomething = false;
while (GetToken(true)) {
nsCSSTokenType tt = mToken.mType;
UngetToken(); // ...but we'll still cheat and use mToken
if (tt == eCSSToken_Symbol) {
// ExpectEndProperty only looks for symbols, and nothing else will
// show up as one.
break;
}
if (tt == eCSSToken_Ident) {
nsCSSKeyword keyword = nsCSSKeywords::LookupKeyword(mToken.mIdent);
int32_t dummy;
if (keyword == eCSSKeyword_inherit ||
keyword == eCSSKeyword__moz_initial ||
keyword == eCSSKeyword_initial) {
return false;
} else if (keyword == eCSSKeyword_none) {
if (haveImage)
return false;
haveImage = true;
if (!ParseSingleValueProperty(aState.mImage->mValue,
eCSSProperty_background_image)) {
NS_NOTREACHED("should be able to parse");
return false;
}
} else if (nsCSSProps::FindKeyword(keyword,
nsCSSProps::kBackgroundAttachmentKTable, dummy)) {
if (haveAttach)
return false;
haveAttach = true;
if (!ParseSingleValueProperty(aState.mAttachment->mValue,
eCSSProperty_background_attachment)) {
NS_NOTREACHED("should be able to parse");
return false;
}
} else if (nsCSSProps::FindKeyword(keyword,
nsCSSProps::kBackgroundRepeatKTable, dummy)) {
if (haveRepeat)
return false;
haveRepeat = true;
nsCSSValuePair scratch;
if (!ParseBackgroundRepeatValues(scratch)) {
NS_NOTREACHED("should be able to parse");
return false;
}
aState.mRepeat->mXValue = scratch.mXValue;
aState.mRepeat->mYValue = scratch.mYValue;
} else if (nsCSSProps::FindKeyword(keyword,
nsCSSProps::kBackgroundPositionKTable, dummy)) {
if (havePositionAndSize)
return false;
havePositionAndSize = true;
if (!ParseBackgroundPositionValues(aState.mPosition->mValue, false)) {
return false;
}
if (ExpectSymbol('/', true)) {
nsCSSValuePair scratch;
if (!ParseBackgroundSizeValues(scratch)) {
return false;
}
aState.mSize->mXValue = scratch.mXValue;
aState.mSize->mYValue = scratch.mYValue;
}
} else if (nsCSSProps::FindKeyword(keyword,
nsCSSProps::kBackgroundOriginKTable, dummy)) {
if (haveOrigin)
return false;
haveOrigin = true;
if (!ParseSingleValueProperty(aState.mOrigin->mValue,
eCSSProperty_background_origin)) {
NS_NOTREACHED("should be able to parse");
return false;
}
// The spec allows a second box value (for background-clip),
// immediately following the first one (for background-origin).
// 'background-clip' and 'background-origin' use the same keyword table
MOZ_ASSERT(nsCSSProps::kKeywordTableTable[
eCSSProperty_background_origin] ==
nsCSSProps::kBackgroundOriginKTable);
MOZ_ASSERT(nsCSSProps::kKeywordTableTable[
eCSSProperty_background_clip] ==
nsCSSProps::kBackgroundOriginKTable);
MOZ_STATIC_ASSERT(NS_STYLE_BG_CLIP_BORDER ==
NS_STYLE_BG_ORIGIN_BORDER &&
NS_STYLE_BG_CLIP_PADDING ==
NS_STYLE_BG_ORIGIN_PADDING &&
NS_STYLE_BG_CLIP_CONTENT ==
NS_STYLE_BG_ORIGIN_CONTENT,
"bg-clip and bg-origin style constants must agree");
if (!ParseSingleValueProperty(aState.mClip->mValue,
eCSSProperty_background_clip)) {
// When exactly one <box> value is set, it is used for both
// 'background-origin' and 'background-clip'.
// See assertions above showing these values are compatible.
aState.mClip->mValue = aState.mOrigin->mValue;
}
} else {
if (haveColor)
return false;
haveColor = true;
if (!ParseSingleValueProperty(aState.mColor,
eCSSProperty_background_color)) {
return false;
}
}
} else if (tt == eCSSToken_URL ||
(tt == eCSSToken_Function &&
(mToken.mIdent.LowerCaseEqualsLiteral("linear-gradient") ||
mToken.mIdent.LowerCaseEqualsLiteral("radial-gradient") ||
mToken.mIdent.LowerCaseEqualsLiteral("repeating-linear-gradient") ||
mToken.mIdent.LowerCaseEqualsLiteral("repeating-radial-gradient") ||
mToken.mIdent.LowerCaseEqualsLiteral("-moz-linear-gradient") ||
mToken.mIdent.LowerCaseEqualsLiteral("-moz-radial-gradient") ||
mToken.mIdent.LowerCaseEqualsLiteral("-moz-repeating-linear-gradient") ||
mToken.mIdent.LowerCaseEqualsLiteral("-moz-repeating-radial-gradient") ||
mToken.mIdent.LowerCaseEqualsLiteral("-moz-image-rect") ||
mToken.mIdent.LowerCaseEqualsLiteral("-moz-element")))) {
if (haveImage)
return false;
haveImage = true;
if (!ParseSingleValueProperty(aState.mImage->mValue,
eCSSProperty_background_image)) {
return false;
}
} else if (tt == eCSSToken_Dimension ||
tt == eCSSToken_Number ||
tt == eCSSToken_Percentage ||
(tt == eCSSToken_Function &&
(mToken.mIdent.LowerCaseEqualsLiteral("calc") ||
mToken.mIdent.LowerCaseEqualsLiteral("-moz-calc")))) {
if (havePositionAndSize)
return false;
havePositionAndSize = true;
if (!ParseBackgroundPositionValues(aState.mPosition->mValue, false)) {
return false;
}
if (ExpectSymbol('/', true)) {
nsCSSValuePair scratch;
if (!ParseBackgroundSizeValues(scratch)) {
return false;
}
aState.mSize->mXValue = scratch.mXValue;
aState.mSize->mYValue = scratch.mYValue;
}
} else {
if (haveColor)
return false;
haveColor = true;
// Note: This parses 'inherit' and 'initial', but
// we've already checked for them, so it's ok.
if (!ParseSingleValueProperty(aState.mColor,
eCSSProperty_background_color)) {
return false;
}
}
haveSomething = true;
}
return haveSomething;
}
// This function is very similar to ParseBackgroundPosition and
// ParseBackgroundSize.
bool
CSSParserImpl::ParseValueList(nsCSSProperty aPropID)
{
// aPropID is a single value prop-id
nsCSSValue value;
if (ParseVariant(value, VARIANT_INHERIT, nullptr)) {
// 'initial' and 'inherit' stand alone, no list permitted.
if (!ExpectEndProperty()) {
return false;
}
} else {
nsCSSValueList* item = value.SetListValue();
for (;;) {
if (!ParseSingleValueProperty(item->mValue, aPropID)) {
return false;
}
if (CheckEndProperty()) {
break;
}
if (!ExpectSymbol(',', true)) {
return false;
}
item->mNext = new nsCSSValueList;
item = item->mNext;
}
}
AppendValue(aPropID, value);
return true;
}
bool
CSSParserImpl::ParseBackgroundRepeat()
{
nsCSSValue value;
if (ParseVariant(value, VARIANT_INHERIT, nullptr)) {
// 'initial' and 'inherit' stand alone, no list permitted.
if (!ExpectEndProperty()) {
return false;
}
} else {
nsCSSValuePair valuePair;
if (!ParseBackgroundRepeatValues(valuePair)) {
return false;
}
nsCSSValuePairList* item = value.SetPairListValue();
for (;;) {
item->mXValue = valuePair.mXValue;
item->mYValue = valuePair.mYValue;
if (CheckEndProperty()) {
break;
}
if (!ExpectSymbol(',', true)) {
return false;
}
if (!ParseBackgroundRepeatValues(valuePair)) {
return false;
}
item->mNext = new nsCSSValuePairList;
item = item->mNext;
}
}
AppendValue(eCSSProperty_background_repeat, value);
return true;
}
bool
CSSParserImpl::ParseBackgroundRepeatValues(nsCSSValuePair& aValue)
{
nsCSSValue& xValue = aValue.mXValue;
nsCSSValue& yValue = aValue.mYValue;
if (ParseEnum(xValue, nsCSSProps::kBackgroundRepeatKTable)) {
int32_t value = xValue.GetIntValue();
// For single values set yValue as eCSSUnit_Null.
if (value == NS_STYLE_BG_REPEAT_REPEAT_X ||
value == NS_STYLE_BG_REPEAT_REPEAT_Y ||
!ParseEnum(yValue, nsCSSProps::kBackgroundRepeatPartKTable)) {
// the caller will fail cases like "repeat-x no-repeat"
// by expecting a list separator or an end property.
yValue.Reset();
}
return true;
}
return false;
}
// This function is very similar to ParseBackgroundList and ParseBackgroundSize.
bool
CSSParserImpl::ParseBackgroundPosition()
{
nsCSSValue value;
if (ParseVariant(value, VARIANT_INHERIT, nullptr)) {
// 'initial' and 'inherit' stand alone, no list permitted.
if (!ExpectEndProperty()) {
return false;
}
} else {
nsCSSValue itemValue;
if (!ParseBackgroundPositionValues(itemValue, false)) {
return false;
}
nsCSSValueList* item = value.SetListValue();
for (;;) {
item->mValue = itemValue;
if (CheckEndProperty()) {
break;
}
if (!ExpectSymbol(',', true)) {
return false;
}
if (!ParseBackgroundPositionValues(itemValue, false)) {
return false;
}
item->mNext = new nsCSSValueList;
item = item->mNext;
}
}
AppendValue(eCSSProperty_background_position, value);
return true;
}
/**
* BoxPositionMaskToCSSValue and ParseBoxPositionValues are used
* for parsing the CSS 2.1 background-position syntax (which has at
* most two values). (Compare to the css3-background syntax which
* takes up to four values.) Some current CSS specifications that
* use background-position-like syntax still use this old syntax.
**
* Parses two values that correspond to positions in a box. These can be
* values corresponding to percentages of the box, raw offsets, or keywords
* like "top," "left center," etc.
*
* @param aOut The nsCSSValuePair in which to place the result.
* @param aAcceptsInherit If true, 'inherit' and 'initial' are legal values
* @param aAllowExplicitCenter If true, 'center' is a legal value
* @return Whether or not the operation succeeded.
*/
bool CSSParserImpl::ParseBoxPositionValues(nsCSSValuePair &aOut,
bool aAcceptsInherit,
bool aAllowExplicitCenter)
{
// First try a percentage or a length value
nsCSSValue &xValue = aOut.mXValue,
&yValue = aOut.mYValue;
int32_t variantMask =
(aAcceptsInherit ? VARIANT_INHERIT : 0) | VARIANT_LP | VARIANT_CALC;
if (ParseVariant(xValue, variantMask, nullptr)) {
if (eCSSUnit_Inherit == xValue.GetUnit() ||
eCSSUnit_Initial == xValue.GetUnit()) { // both are inherited or both are set to initial
yValue = xValue;
return true;
}
// We have one percentage/length/calc. Get the optional second
// percentage/length/calc/keyword.
if (ParseVariant(yValue, VARIANT_LP | VARIANT_CALC, nullptr)) {
// We have two numbers
return true;
}
if (ParseEnum(yValue, nsCSSProps::kBackgroundPositionKTable)) {
int32_t yVal = yValue.GetIntValue();
if (!(yVal & BG_CTB)) {
// The second keyword can only be 'center', 'top', or 'bottom'
return false;
}
yValue = BoxPositionMaskToCSSValue(yVal, false);
return true;
}
// If only one percentage or length value is given, it sets the
// horizontal position only, and the vertical position will be 50%.
yValue.SetPercentValue(0.5f);
return true;
}
// Now try keywords. We do this manually to allow for the first
// appearance of "center" to apply to the either the x or y
// position (it's ambiguous so we have to disambiguate). Each
// allowed keyword value is assigned it's own bit. We don't allow
// any duplicate keywords other than center. We try to get two
// keywords but it's okay if there is only one.
int32_t mask = 0;
if (ParseEnum(xValue, nsCSSProps::kBackgroundPositionKTable)) {
int32_t bit = xValue.GetIntValue();
mask |= bit;
if (ParseEnum(xValue, nsCSSProps::kBackgroundPositionKTable)) {
bit = xValue.GetIntValue();
if (mask & (bit & ~BG_CENTER)) {
// Only the 'center' keyword can be duplicated.
return false;
}
mask |= bit;
}
else {
// Only one keyword. See if we have a length, percentage, or calc.
if (ParseVariant(yValue, VARIANT_LP | VARIANT_CALC, nullptr)) {
if (!(mask & BG_CLR)) {
// The first keyword can only be 'center', 'left', or 'right'
return false;
}
xValue = BoxPositionMaskToCSSValue(mask, true);
return true;
}
}
}
// Check for bad input. Bad input consists of no matching keywords,
// or pairs of x keywords or pairs of y keywords.
if ((mask == 0) || (mask == (BG_TOP | BG_BOTTOM)) ||
(mask == (BG_LEFT | BG_RIGHT)) ||
(!aAllowExplicitCenter && (mask & BG_CENTER))) {
return false;
}
// Create style values
xValue = BoxPositionMaskToCSSValue(mask, true);
yValue = BoxPositionMaskToCSSValue(mask, false);
return true;
}
bool CSSParserImpl::ParseBackgroundPositionValues(nsCSSValue& aOut,
bool aAcceptsInherit)
{
// css3-background allows positions to be defined as offsets
// from an edge. There can be 2 keywords and 2 offsets given. These
// four 'values' are stored in an array in the following order:
// [keyword offset keyword offset]. If a keyword or offset isn't
// parsed the value of the corresponding array element is set
// to eCSSUnit_Null by a call to nsCSSValue::Reset().
if (aAcceptsInherit && ParseVariant(aOut, VARIANT_INHERIT, nullptr)) {
return true;
}
nsRefPtr<nsCSSValue::Array> value = nsCSSValue::Array::Create(4);
aOut.SetArrayValue(value, eCSSUnit_Array);
// The following clarifies organisation of the array.
nsCSSValue &xEdge = value->Item(0),
&xOffset = value->Item(1),
&yEdge = value->Item(2),
&yOffset = value->Item(3);
// Parse all the values into the array.
uint32_t valueCount = 0;
for (int32_t i = 0; i < 4; i++) {
if (!ParseVariant(value->Item(i), VARIANT_LPCALC | VARIANT_KEYWORD,
nsCSSProps::kBackgroundPositionKTable)) {
break;
}
++valueCount;
}
switch (valueCount) {
case 4:
// "If three or four values are given, then each <percentage> or <length>
// represents an offset and must be preceded by a keyword, which specifies
// from which edge the offset is given."
if (eCSSUnit_Enumerated != xEdge.GetUnit() ||
BG_CENTER == xEdge.GetIntValue() ||
eCSSUnit_Enumerated == xOffset.GetUnit() ||
eCSSUnit_Enumerated != yEdge.GetUnit() ||
BG_CENTER == yEdge.GetIntValue() ||
eCSSUnit_Enumerated == yOffset.GetUnit()) {
return false;
}
break;
case 3:
// "If three or four values are given, then each <percentage> or<length>
// represents an offset and must be preceded by a keyword, which specifies
// from which edge the offset is given." ... "If three values are given,
// the missing offset is assumed to be zero."
if (eCSSUnit_Enumerated != value->Item(1).GetUnit()) {
// keyword offset keyword
// Second value is non-keyword, thus first value must be a non-center
// keyword.
if (eCSSUnit_Enumerated != value->Item(0).GetUnit() ||
BG_CENTER == value->Item(0).GetIntValue()) {
return false;
}
// Remaining value must be a keyword.
if (eCSSUnit_Enumerated != value->Item(2).GetUnit()) {
return false;
}
yOffset.Reset(); // Everything else is in the correct position.
} else if (eCSSUnit_Enumerated != value->Item(2).GetUnit()) {
// keyword keyword offset
// Third value is non-keyword, thus second value must be non-center
// keyword.
if (BG_CENTER == value->Item(1).GetIntValue()) {
return false;
}
// Remaining value must be a keyword.
if (eCSSUnit_Enumerated != value->Item(0).GetUnit()) {
return false;
}
// Move the values to the correct position in the array.
value->Item(3) = value->Item(2); // yOffset
value->Item(2) = value->Item(1); // yEdge
value->Item(1).Reset(); // xOffset
} else {
return false;
}
break;
case 2:
// "If two values are given and at least one value is not a keyword, then
// the first value represents the horizontal position (or offset) and the
// second represents the vertical position (or offset)"
if (eCSSUnit_Enumerated == value->Item(0).GetUnit()) {
if (eCSSUnit_Enumerated == value->Item(1).GetUnit()) {
// keyword keyword
value->Item(2) = value->Item(1); // move yEdge to correct position
xOffset.Reset();
yOffset.Reset();
} else {
// keyword offset
// First value must represent horizontal position.
if ((BG_TOP | BG_BOTTOM) & value->Item(0).GetIntValue()) {
return false;
}
value->Item(3) = value->Item(1); // move yOffset to correct position
xOffset.Reset();
yEdge.Reset();
}
} else {
if (eCSSUnit_Enumerated == value->Item(1).GetUnit()) {
// offset keyword
// Second value must represent vertical position.
if ((BG_LEFT | BG_RIGHT) & value->Item(1).GetIntValue()) {
return false;
}
value->Item(2) = value->Item(1); // move yEdge to correct position
value->Item(1) = value->Item(0); // move xOffset to correct position
xEdge.Reset();
yOffset.Reset();
} else {
// offset offset
value->Item(3) = value->Item(1); // move yOffset to correct position
value->Item(1) = value->Item(0); // move xOffset to correct position
xEdge.Reset();
yEdge.Reset();
}
}
break;
case 1:
// "If only one value is specified, the second value is assumed to be
// center."
if (eCSSUnit_Enumerated == value->Item(0).GetUnit()) {
xOffset.Reset();
} else {
value->Item(1) = value->Item(0); // move xOffset to correct position
xEdge.Reset();
}
yEdge.SetIntValue(NS_STYLE_BG_POSITION_CENTER, eCSSUnit_Enumerated);
yOffset.Reset();
break;
default:
return false;
}
// For compatibility with CSS2.1 code the edges can be unspecified.
// Unspecified edges are recorded as NULL.
NS_ASSERTION((eCSSUnit_Enumerated == xEdge.GetUnit() ||
eCSSUnit_Null == xEdge.GetUnit()) &&
(eCSSUnit_Enumerated == yEdge.GetUnit() ||
eCSSUnit_Null == yEdge.GetUnit()) &&
eCSSUnit_Enumerated != xOffset.GetUnit() &&
eCSSUnit_Enumerated != yOffset.GetUnit(),
"Unexpected units");
// Keywords in first and second pairs can not both be vertical or
// horizontal keywords. (eg. left right, bottom top). Additionally,
// non-center keyword can not be duplicated (eg. left left).
int32_t xEdgeEnum =
xEdge.GetUnit() == eCSSUnit_Enumerated ? xEdge.GetIntValue() : 0;
int32_t yEdgeEnum =
yEdge.GetUnit() == eCSSUnit_Enumerated ? yEdge.GetIntValue() : 0;
if ((xEdgeEnum | yEdgeEnum) == (BG_LEFT | BG_RIGHT) ||
(xEdgeEnum | yEdgeEnum) == (BG_TOP | BG_BOTTOM) ||
(xEdgeEnum & yEdgeEnum & ~BG_CENTER)) {
return false;
}
// The values could be in an order that is different than expected.
// eg. x contains vertical information, y contains horizontal information.
// Swap if incorrect order.
if (xEdgeEnum & (BG_TOP | BG_BOTTOM) ||
yEdgeEnum & (BG_LEFT | BG_RIGHT)) {
nsCSSValue swapEdge = xEdge;
nsCSSValue swapOffset = xOffset;
xEdge = yEdge;
xOffset = yOffset;
yEdge = swapEdge;
yOffset = swapOffset;
}
return true;
}
// This function is very similar to ParseBackgroundList and
// ParseBackgroundPosition.
bool
CSSParserImpl::ParseBackgroundSize()
{
nsCSSValue value;
if (ParseVariant(value, VARIANT_INHERIT, nullptr)) {
// 'initial' and 'inherit' stand alone, no list permitted.
if (!ExpectEndProperty()) {
return false;
}
} else {
nsCSSValuePair valuePair;
if (!ParseBackgroundSizeValues(valuePair)) {
return false;
}
nsCSSValuePairList* item = value.SetPairListValue();
for (;;) {
item->mXValue = valuePair.mXValue;
item->mYValue = valuePair.mYValue;
if (CheckEndProperty()) {
break;
}
if (!ExpectSymbol(',', true)) {
return false;
}
if (!ParseBackgroundSizeValues(valuePair)) {
return false;
}
item->mNext = new nsCSSValuePairList;
item = item->mNext;
}
}
AppendValue(eCSSProperty_background_size, value);
return true;
}
/**
* Parses two values that correspond to lengths for the background-size
* property. These can be one or two lengths (or the 'auto' keyword) or
* percentages corresponding to the element's dimensions or the single keywords
* 'contain' or 'cover'. 'initial' and 'inherit' must be handled by the caller
* if desired.
*
* @param aOut The nsCSSValuePair in which to place the result.
* @return Whether or not the operation succeeded.
*/
#define BG_SIZE_VARIANT (VARIANT_LP | VARIANT_AUTO | VARIANT_CALC)
bool CSSParserImpl::ParseBackgroundSizeValues(nsCSSValuePair &aOut)
{
// First try a percentage or a length value
nsCSSValue &xValue = aOut.mXValue,
&yValue = aOut.mYValue;
if (ParseNonNegativeVariant(xValue, BG_SIZE_VARIANT, nullptr)) {
// We have one percentage/length/calc/auto. Get the optional second
// percentage/length/calc/keyword.
if (ParseNonNegativeVariant(yValue, BG_SIZE_VARIANT, nullptr)) {
// We have a second percentage/length/calc/auto.
return true;
}
// If only one percentage or length value is given, it sets the
// horizontal size only, and the vertical size will be as if by 'auto'.
yValue.SetAutoValue();
return true;
}
// Now address 'contain' and 'cover'.
if (!ParseEnum(xValue, nsCSSProps::kBackgroundSizeKTable))
return false;
yValue.Reset();
return true;
}
#undef BG_SIZE_VARIANT
bool
CSSParserImpl::ParseBorderColor()
{
static const nsCSSProperty kBorderColorSources[] = {
eCSSProperty_border_left_color_ltr_source,
eCSSProperty_border_left_color_rtl_source,
eCSSProperty_border_right_color_ltr_source,
eCSSProperty_border_right_color_rtl_source,
eCSSProperty_UNKNOWN
};
// do this now, in case 4 values weren't specified
InitBoxPropsAsPhysical(kBorderColorSources);
return ParseBoxProperties(kBorderColorIDs);
}
void
CSSParserImpl::SetBorderImageInitialValues()
{
// border-image-source: none
nsCSSValue source;
source.SetNoneValue();
AppendValue(eCSSProperty_border_image_source, source);
// border-image-slice: 100%
nsCSSValue sliceBoxValue;
nsCSSRect& sliceBox = sliceBoxValue.SetRectValue();
sliceBox.SetAllSidesTo(nsCSSValue(1.0f, eCSSUnit_Percent));
nsCSSValue slice;
nsCSSValueList* sliceList = slice.SetListValue();
sliceList->mValue = sliceBoxValue;
AppendValue(eCSSProperty_border_image_slice, slice);
// border-image-width: 1
nsCSSValue width;
nsCSSRect& widthBox = width.SetRectValue();
widthBox.SetAllSidesTo(nsCSSValue(1.0f, eCSSUnit_Number));
AppendValue(eCSSProperty_border_image_width, width);
// border-image-outset: 0
nsCSSValue outset;
nsCSSRect& outsetBox = outset.SetRectValue();
outsetBox.SetAllSidesTo(nsCSSValue(0.0f, eCSSUnit_Number));
AppendValue(eCSSProperty_border_image_outset, outset);
// border-image-repeat: repeat
nsCSSValue repeat;
nsCSSValuePair repeatPair;
repeatPair.SetBothValuesTo(nsCSSValue(NS_STYLE_BORDER_IMAGE_REPEAT_STRETCH,
eCSSUnit_Enumerated));
repeat.SetPairValue(&repeatPair);
AppendValue(eCSSProperty_border_image_repeat, repeat);
}
bool
CSSParserImpl::ParseBorderImageSlice(bool aAcceptsInherit,
bool* aConsumedTokens)
{
// border-image-slice: initial | [<number>|<percentage>]{1,4} && fill?
nsCSSValue value;
if (aConsumedTokens) {
*aConsumedTokens = true;
}
if (aAcceptsInherit && ParseVariant(value, VARIANT_INHERIT, nullptr)) {
// Keyword "inherit" can not be mixed, so we are done.
AppendValue(eCSSProperty_border_image_slice, value);
return true;
}
// Try parsing "fill" value.
nsCSSValue imageSliceFillValue;
bool hasFill = ParseEnum(imageSliceFillValue,
nsCSSProps::kBorderImageSliceKTable);
// Parse the box dimensions.
nsCSSValue imageSliceBoxValue;
if (!ParseGroupedBoxProperty(VARIANT_PN, imageSliceBoxValue)) {
if (!hasFill && aConsumedTokens) {
*aConsumedTokens = false;
}
return false;
}
// Try parsing "fill" keyword again if the first time failed because keyword
// and slice dimensions can be in any order.
if (!hasFill) {
hasFill = ParseEnum(imageSliceFillValue,
nsCSSProps::kBorderImageSliceKTable);
}
nsCSSValueList* borderImageSlice = value.SetListValue();
// Put the box value into the list.
borderImageSlice->mValue = imageSliceBoxValue;
if (hasFill) {
// Put the "fill" value into the list.
borderImageSlice->mNext = new nsCSSValueList;
borderImageSlice->mNext->mValue = imageSliceFillValue;
}
AppendValue(eCSSProperty_border_image_slice, value);
return true;
}
bool
CSSParserImpl::ParseBorderImageWidth(bool aAcceptsInherit)
{
// border-image-width: initial | [<length>|<number>|<percentage>|auto]{1,4}
nsCSSValue value;
if (aAcceptsInherit && ParseVariant(value, VARIANT_INHERIT, nullptr)) {
// Keyword "inherit" can no be mixed, so we are done.
AppendValue(eCSSProperty_border_image_width, value);
return true;
}
// Parse the box dimensions.
if (!ParseGroupedBoxProperty(VARIANT_ALPN, value)) {
return false;
}
AppendValue(eCSSProperty_border_image_width, value);
return true;
}
bool
CSSParserImpl::ParseBorderImageOutset(bool aAcceptsInherit)
{
// border-image-outset: initial | [<length>|<number>]{1,4}
nsCSSValue value;
if (aAcceptsInherit && ParseVariant(value, VARIANT_INHERIT, nullptr)) {
// Keyword "inherit" can not be mixed, so we are done.
AppendValue(eCSSProperty_border_image_outset, value);
return true;
}
// Parse the box dimensions.
if (!ParseGroupedBoxProperty(VARIANT_LN, value)) {
return false;
}
AppendValue(eCSSProperty_border_image_outset, value);
return true;
}
bool
CSSParserImpl::ParseBorderImageRepeat(bool aAcceptsInherit)
{
nsCSSValue value;
if (aAcceptsInherit && ParseVariant(value, VARIANT_INHERIT, nullptr)) {
// Keyword "inherit" can not be mixed, so we are done.
AppendValue(eCSSProperty_border_image_repeat, value);
return true;
}
nsCSSValuePair result;
if (!ParseEnum(result.mXValue, nsCSSProps::kBorderImageRepeatKTable)) {
return false;
}
// optional second keyword, defaults to first
if (!ParseEnum(result.mYValue, nsCSSProps::kBorderImageRepeatKTable)) {
result.mYValue = result.mXValue;
}
value.SetPairValue(&result);
AppendValue(eCSSProperty_border_image_repeat, value);
return true;
}
bool
CSSParserImpl::ParseBorderImage()
{
nsAutoParseCompoundProperty compound(this);
// border-image: inherit | initial |
// <border-image-source> ||
// <border-image-slice>
// [ / <border-image-width> |
// / <border-image-width>? / <border-image-outset> ]? ||
// <border-image-repeat>
nsCSSValue value;
if (ParseVariant(value, VARIANT_INHERIT, nullptr)) {
AppendValue(eCSSProperty_border_image_source, value);
AppendValue(eCSSProperty_border_image_slice, value);
AppendValue(eCSSProperty_border_image_width, value);
AppendValue(eCSSProperty_border_image_outset, value);
AppendValue(eCSSProperty_border_image_repeat, value);
// Keyword "inherit" (and "initial") can't be mixed, so we are done.
return true;
}
// No empty property.
if (CheckEndProperty()) {
return false;
}
// Shorthand properties are required to set everything they can.
SetBorderImageInitialValues();
bool foundSource = false;
bool foundSliceWidthOutset = false;
bool foundRepeat = false;
// This loop is used to handle the parsing of border-image properties which
// can appear in any order.
nsCSSValue imageSourceValue;
while (!CheckEndProperty()) {
// <border-image-source>
if (!foundSource && ParseVariant(imageSourceValue, VARIANT_UO, nullptr)) {
AppendValue(eCSSProperty_border_image_source, imageSourceValue);
foundSource = true;
continue;
}
// <border-image-slice>
// ParseBorderImageSlice is weird. It may consume tokens and then return
// false, because it parses a property with two required components that
// can appear in either order. Since the tokens that were consumed cannot
// parse as anything else we care about, this isn't a problem.
if (!foundSliceWidthOutset) {
bool sliceConsumedTokens = false;
if (ParseBorderImageSlice(false, &sliceConsumedTokens)) {
foundSliceWidthOutset = true;
// [ / <border-image-width>?
if (ExpectSymbol('/', true)) {
bool foundBorderImageWidth = ParseBorderImageWidth(false);
// [ / <border-image-outset>
if (ExpectSymbol('/', true)) {
if (!ParseBorderImageOutset(false)) {
return false;
}
} else if (!foundBorderImageWidth) {
// If this part has an trailing slash, the whole declaration is
// invalid.
return false;
}
}
continue;
} else {
// If we consumed some tokens for <border-image-slice> but did not
// successfully parse it, we have an error.
if (sliceConsumedTokens) {
return false;
}
}
}
// <border-image-repeat>
if (!foundRepeat && ParseBorderImageRepeat(false)) {
foundRepeat = true;
continue;
}
return false;
}
return true;
}
bool
CSSParserImpl::ParseBorderSpacing()
{
nsCSSValue xValue, yValue;
if (!ParseNonNegativeVariant(xValue, VARIANT_HL | VARIANT_CALC, nullptr)) {
return false;
}
// If we have one length, get the optional second length.
// set the second value equal to the first.
if (xValue.IsLengthUnit() || xValue.IsCalcUnit()) {
ParseNonNegativeVariant(yValue, VARIANT_LENGTH | VARIANT_CALC, nullptr);
}
if (!ExpectEndProperty()) {
return false;
}
if (yValue == xValue || yValue.GetUnit() == eCSSUnit_Null) {
AppendValue(eCSSProperty_border_spacing, xValue);
} else {
nsCSSValue pair;
pair.SetPairValue(xValue, yValue);
AppendValue(eCSSProperty_border_spacing, pair);
}
return true;
}
bool
CSSParserImpl::ParseBorderSide(const nsCSSProperty aPropIDs[],
bool aSetAllSides)
{
const int32_t numProps = 3;
nsCSSValue values[numProps];
int32_t found = ParseChoice(values, aPropIDs, numProps);
if ((found < 1) || (false == ExpectEndProperty())) {
return false;
}
if ((found & 1) == 0) { // Provide default border-width
values[0].SetIntValue(NS_STYLE_BORDER_WIDTH_MEDIUM, eCSSUnit_Enumerated);
}
if ((found & 2) == 0) { // Provide default border-style
values[1].SetIntValue(NS_STYLE_BORDER_STYLE_NONE, eCSSUnit_Enumerated);
}
if ((found & 4) == 0) { // text color will be used
values[2].SetIntValue(NS_STYLE_COLOR_MOZ_USE_TEXT_COLOR, eCSSUnit_Enumerated);
}
if (aSetAllSides) {
static const nsCSSProperty kBorderSources[] = {
eCSSProperty_border_left_color_ltr_source,
eCSSProperty_border_left_color_rtl_source,
eCSSProperty_border_right_color_ltr_source,
eCSSProperty_border_right_color_rtl_source,
eCSSProperty_border_left_style_ltr_source,
eCSSProperty_border_left_style_rtl_source,
eCSSProperty_border_right_style_ltr_source,
eCSSProperty_border_right_style_rtl_source,
eCSSProperty_border_left_width_ltr_source,
eCSSProperty_border_left_width_rtl_source,
eCSSProperty_border_right_width_ltr_source,
eCSSProperty_border_right_width_rtl_source,
eCSSProperty_UNKNOWN
};
InitBoxPropsAsPhysical(kBorderSources);
// Parsing "border" shorthand; set all four sides to the same thing
for (int32_t index = 0; index < 4; index++) {
NS_ASSERTION(numProps == 3, "This code needs updating");
AppendValue(kBorderWidthIDs[index], values[0]);
AppendValue(kBorderStyleIDs[index], values[1]);
AppendValue(kBorderColorIDs[index], values[2]);
}
static const nsCSSProperty kBorderColorsProps[] = {
eCSSProperty_border_top_colors,
eCSSProperty_border_right_colors,
eCSSProperty_border_bottom_colors,
eCSSProperty_border_left_colors
};
// Set the other properties that the border shorthand sets to their
// initial values.
nsCSSValue extraValue;
switch (values[0].GetUnit()) {
case eCSSUnit_Inherit:
case eCSSUnit_Initial:
extraValue = values[0];
// Set value of border-image properties to initial/inherit
AppendValue(eCSSProperty_border_image_source, extraValue);
AppendValue(eCSSProperty_border_image_slice, extraValue);
AppendValue(eCSSProperty_border_image_width, extraValue);
AppendValue(eCSSProperty_border_image_outset, extraValue);
AppendValue(eCSSProperty_border_image_repeat, extraValue);
break;
default:
extraValue.SetNoneValue();
SetBorderImageInitialValues();
break;
}
NS_FOR_CSS_SIDES(side) {
AppendValue(kBorderColorsProps[side], extraValue);
}
}
else {
// Just set our one side
for (int32_t index = 0; index < numProps; index++) {
AppendValue(aPropIDs[index], values[index]);
}
}
return true;
}
bool
CSSParserImpl::ParseDirectionalBorderSide(const nsCSSProperty aPropIDs[],
int32_t aSourceType)
{
const int32_t numProps = 3;
nsCSSValue values[numProps];
int32_t found = ParseChoice(values, aPropIDs, numProps);
if ((found < 1) || (false == ExpectEndProperty())) {
return false;
}
if ((found & 1) == 0) { // Provide default border-width
values[0].SetIntValue(NS_STYLE_BORDER_WIDTH_MEDIUM, eCSSUnit_Enumerated);
}
if ((found & 2) == 0) { // Provide default border-style
values[1].SetIntValue(NS_STYLE_BORDER_STYLE_NONE, eCSSUnit_Enumerated);
}
if ((found & 4) == 0) { // text color will be used
values[2].SetIntValue(NS_STYLE_COLOR_MOZ_USE_TEXT_COLOR, eCSSUnit_Enumerated);
}
for (int32_t index = 0; index < numProps; index++) {
const nsCSSProperty* subprops =
nsCSSProps::SubpropertyEntryFor(aPropIDs[index + numProps]);
NS_ASSERTION(subprops[3] == eCSSProperty_UNKNOWN,
"not box property with physical vs. logical cascading");
AppendValue(subprops[0], values[index]);
nsCSSValue typeVal(aSourceType, eCSSUnit_Enumerated);
AppendValue(subprops[1], typeVal);
AppendValue(subprops[2], typeVal);
}
return true;
}
bool
CSSParserImpl::ParseBorderStyle()
{
static const nsCSSProperty kBorderStyleSources[] = {
eCSSProperty_border_left_style_ltr_source,
eCSSProperty_border_left_style_rtl_source,
eCSSProperty_border_right_style_ltr_source,
eCSSProperty_border_right_style_rtl_source,
eCSSProperty_UNKNOWN
};
// do this now, in case 4 values weren't specified
InitBoxPropsAsPhysical(kBorderStyleSources);
return ParseBoxProperties(kBorderStyleIDs);
}
bool
CSSParserImpl::ParseBorderWidth()
{
static const nsCSSProperty kBorderWidthSources[] = {
eCSSProperty_border_left_width_ltr_source,
eCSSProperty_border_left_width_rtl_source,
eCSSProperty_border_right_width_ltr_source,
eCSSProperty_border_right_width_rtl_source,
eCSSProperty_UNKNOWN
};
// do this now, in case 4 values weren't specified
InitBoxPropsAsPhysical(kBorderWidthSources);
return ParseBoxProperties(kBorderWidthIDs);
}
bool
CSSParserImpl::ParseBorderColors(nsCSSProperty aProperty)
{
nsCSSValue value;
if (ParseVariant(value, VARIANT_INHERIT | VARIANT_NONE, nullptr)) {
// 'inherit', 'initial', and 'none' are only allowed on their own
if (!ExpectEndProperty()) {
return false;
}
} else {
nsCSSValueList *cur = value.SetListValue();
for (;;) {
if (!ParseVariant(cur->mValue, VARIANT_COLOR | VARIANT_KEYWORD,
nsCSSProps::kBorderColorKTable)) {
return false;
}
if (CheckEndProperty()) {
break;
}
cur->mNext = new nsCSSValueList;
cur = cur->mNext;
}
}
AppendValue(aProperty, value);
return true;
}
// Parse the top level of a calc() expression.
bool
CSSParserImpl::ParseCalc(nsCSSValue &aValue, int32_t aVariantMask)
{
// Parsing calc expressions requires, in a number of cases, looking
// for a token that is *either* a value of the property or a number.
// This can be done without lookahead when we assume that the property
// values cannot themselves be numbers.
NS_ASSERTION(!(aVariantMask & VARIANT_NUMBER), "unexpected variant mask");
NS_ABORT_IF_FALSE(aVariantMask != 0, "unexpected variant mask");
bool oldUnitlessLengthQuirk = mUnitlessLengthQuirk;
mUnitlessLengthQuirk = false;
// One-iteration loop so we can break to the error-handling case.
do {
// The toplevel of a calc() is always an nsCSSValue::Array of length 1.
nsRefPtr<nsCSSValue::Array> arr = nsCSSValue::Array::Create(1);
if (!ParseCalcAdditiveExpression(arr->Item(0), aVariantMask))
break;
if (!ExpectSymbol(')', true))
break;
aValue.SetArrayValue(arr, eCSSUnit_Calc);
mUnitlessLengthQuirk = oldUnitlessLengthQuirk;
return true;
} while (false);
SkipUntil(')');
mUnitlessLengthQuirk = oldUnitlessLengthQuirk;
return false;
}
// We optimize away the <value-expression> production given that
// ParseVariant consumes initial whitespace and we call
// ExpectSymbol(')') with true for aSkipWS.
// * If aVariantMask is VARIANT_NUMBER, this function parses the
// <number-additive-expression> production.
// * If aVariantMask does not contain VARIANT_NUMBER, this function
// parses the <value-additive-expression> production.
// * Otherwise (VARIANT_NUMBER and other bits) this function parses
// whichever one of the productions matches ***and modifies
// aVariantMask*** to reflect which one it has parsed by either
// removing VARIANT_NUMBER or removing all other bits.
// It does so iteratively, but builds the correct recursive
// data structure.
bool
CSSParserImpl::ParseCalcAdditiveExpression(nsCSSValue& aValue,
int32_t& aVariantMask)
{
NS_ABORT_IF_FALSE(aVariantMask != 0, "unexpected variant mask");
nsCSSValue *storage = &aValue;
for (;;) {
bool haveWS;
if (!ParseCalcMultiplicativeExpression(*storage, aVariantMask, &haveWS))
return false;
if (!haveWS || !GetToken(false))
return true;
nsCSSUnit unit;
if (mToken.IsSymbol('+')) {
unit = eCSSUnit_Calc_Plus;
} else if (mToken.IsSymbol('-')) {
unit = eCSSUnit_Calc_Minus;
} else {
UngetToken();
return true;
}
if (!RequireWhitespace())
return false;
nsRefPtr<nsCSSValue::Array> arr = nsCSSValue::Array::Create(2);
arr->Item(0) = aValue;
storage = &arr->Item(1);
aValue.SetArrayValue(arr, unit);
}
}
struct ReduceNumberCalcOps : public mozilla::css::BasicFloatCalcOps,
public mozilla::css::CSSValueInputCalcOps
{
result_type ComputeLeafValue(const nsCSSValue& aValue)
{
NS_ABORT_IF_FALSE(aValue.GetUnit() == eCSSUnit_Number, "unexpected unit");
return aValue.GetFloatValue();
}
float ComputeNumber(const nsCSSValue& aValue)
{
return mozilla::css::ComputeCalc(aValue, *this);
}
};
// * If aVariantMask is VARIANT_NUMBER, this function parses the
// <number-multiplicative-expression> production.
// * If aVariantMask does not contain VARIANT_NUMBER, this function
// parses the <value-multiplicative-expression> production.
// * Otherwise (VARIANT_NUMBER and other bits) this function parses
// whichever one of the productions matches ***and modifies
// aVariantMask*** to reflect which one it has parsed by either
// removing VARIANT_NUMBER or removing all other bits.
// It does so iteratively, but builds the correct recursive data
// structure.
// This function always consumes *trailing* whitespace when it returns
// true; whether there was any such whitespace is returned in the
// aHadFinalWS parameter.
bool
CSSParserImpl::ParseCalcMultiplicativeExpression(nsCSSValue& aValue,
int32_t& aVariantMask,
bool *aHadFinalWS)
{
NS_ABORT_IF_FALSE(aVariantMask != 0, "unexpected variant mask");
bool gotValue = false; // already got the part with the unit
bool afterDivision = false;
nsCSSValue *storage = &aValue;
for (;;) {
int32_t variantMask;
if (afterDivision || gotValue) {
variantMask = VARIANT_NUMBER;
} else {
variantMask = aVariantMask | VARIANT_NUMBER;
}
if (!ParseCalcTerm(*storage, variantMask))
return false;
NS_ABORT_IF_FALSE(variantMask != 0,
"ParseCalcTerm did not set variantMask appropriately");
NS_ABORT_IF_FALSE(!(variantMask & VARIANT_NUMBER) ||
!(variantMask & ~int32_t(VARIANT_NUMBER)),
"ParseCalcTerm did not set variantMask appropriately");
if (variantMask & VARIANT_NUMBER) {
// Simplify the value immediately so we can check for division by
// zero.
ReduceNumberCalcOps ops;
float number = mozilla::css::ComputeCalc(*storage, ops);
if (number == 0.0 && afterDivision)
return false;
storage->SetFloatValue(number, eCSSUnit_Number);
} else {
gotValue = true;
if (storage != &aValue) {
// Simplify any numbers in the Times_L position (which are
// not simplified by the check above).
NS_ABORT_IF_FALSE(storage == &aValue.GetArrayValue()->Item(1),
"unexpected relationship to current storage");
nsCSSValue &leftValue = aValue.GetArrayValue()->Item(0);
ReduceNumberCalcOps ops;
float number = mozilla::css::ComputeCalc(leftValue, ops);
leftValue.SetFloatValue(number, eCSSUnit_Number);
}
}
bool hadWS = RequireWhitespace();
if (!GetToken(false)) {
*aHadFinalWS = hadWS;
break;
}
nsCSSUnit unit;
if (mToken.IsSymbol('*')) {
unit = gotValue ? eCSSUnit_Calc_Times_R : eCSSUnit_Calc_Times_L;
afterDivision = false;
} else if (mToken.IsSymbol('/')) {
unit = eCSSUnit_Calc_Divided;
afterDivision = true;
} else {
UngetToken();
*aHadFinalWS = hadWS;
break;
}
nsRefPtr<nsCSSValue::Array> arr = nsCSSValue::Array::Create(2);
arr->Item(0) = aValue;
storage = &arr->Item(1);
aValue.SetArrayValue(arr, unit);
}
// Adjust aVariantMask (see comments above function) to reflect which
// option we took.
if (aVariantMask & VARIANT_NUMBER) {
if (gotValue) {
aVariantMask &= ~int32_t(VARIANT_NUMBER);
} else {
aVariantMask = VARIANT_NUMBER;
}
} else {
if (!gotValue) {
// We had to find a value, but we didn't.
return false;
}
}
return true;
}
// * If aVariantMask is VARIANT_NUMBER, this function parses the
// <number-term> production.
// * If aVariantMask does not contain VARIANT_NUMBER, this function
// parses the <value-term> production.
// * Otherwise (VARIANT_NUMBER and other bits) this function parses
// whichever one of the productions matches ***and modifies
// aVariantMask*** to reflect which one it has parsed by either
// removing VARIANT_NUMBER or removing all other bits.
bool
CSSParserImpl::ParseCalcTerm(nsCSSValue& aValue, int32_t& aVariantMask)
{
NS_ABORT_IF_FALSE(aVariantMask != 0, "unexpected variant mask");
if (!GetToken(true))
return false;
// Either an additive expression in parentheses...
if (mToken.IsSymbol('(')) {
if (!ParseCalcAdditiveExpression(aValue, aVariantMask) ||
!ExpectSymbol(')', true)) {
SkipUntil(')');
return false;
}
return true;
}
// ... or just a value
UngetToken();
// Always pass VARIANT_NUMBER to ParseVariant so that unitless zero
// always gets picked up
if (!ParseVariant(aValue, aVariantMask | VARIANT_NUMBER, nullptr)) {
return false;
}
// ...and do the VARIANT_NUMBER check ourselves.
if (!(aVariantMask & VARIANT_NUMBER) && aValue.GetUnit() == eCSSUnit_Number) {
return false;
}
// If we did the value parsing, we need to adjust aVariantMask to
// reflect which option we took (see above).
if (aVariantMask & VARIANT_NUMBER) {
if (aValue.GetUnit() == eCSSUnit_Number) {
aVariantMask = VARIANT_NUMBER;
} else {
aVariantMask &= ~int32_t(VARIANT_NUMBER);
}
}
return true;
}
// This function consumes all consecutive whitespace and returns whether
// there was any.
bool
CSSParserImpl::RequireWhitespace()
{
if (!GetToken(false))
return false;
if (mToken.mType != eCSSToken_Whitespace) {
UngetToken();
return false;
}
// Skip any additional whitespace tokens.
if (GetToken(true)) {
UngetToken();
}
return true;
}
bool
CSSParserImpl::ParseRect(nsCSSProperty aPropID)
{
if (! GetToken(true)) {
return false;
}
nsCSSValue val;
if (mToken.mType == eCSSToken_Ident) {
nsCSSKeyword keyword = nsCSSKeywords::LookupKeyword(mToken.mIdent);
switch (keyword) {
case eCSSKeyword_auto:
if (!ExpectEndProperty()) {
return false;
}
val.SetAutoValue();
break;
case eCSSKeyword_inherit:
if (!ExpectEndProperty()) {
return false;
}
val.SetInheritValue();
break;
case eCSSKeyword_initial:
case eCSSKeyword__moz_initial:
if (!ExpectEndProperty()) {
return false;
}
val.SetInitialValue();
break;
default:
UngetToken();
return false;
}
} else if (mToken.mType == eCSSToken_Function &&
mToken.mIdent.LowerCaseEqualsLiteral("rect")) {
nsCSSRect& rect = val.SetRectValue();
bool useCommas;
NS_FOR_CSS_SIDES(side) {
if (! ParseVariant(rect.*(nsCSSRect::sides[side]),
VARIANT_AL, nullptr)) {
return false;
}
if (side == 0) {
useCommas = ExpectSymbol(',', true);
} else if (useCommas && side < 3) {
// Skip optional commas between elements, but only if the first
// separator was a comma.
if (!ExpectSymbol(',', true)) {
return false;
}
}
}
if (!ExpectSymbol(')', true)) {
return false;
}
if (!ExpectEndProperty()) {
return false;
}
} else {
UngetToken();
return false;
}
AppendValue(aPropID, val);
return true;
}
bool
CSSParserImpl::ParseColumns()
{
// We use a similar "fake value" hack to ParseListStyle, because
// "auto" is acceptable for both column-count and column-width.
// If the fake "auto" value is found, and one of the real values isn't,
// that means the fake auto value is meant for the real value we didn't
// find.
static const nsCSSProperty columnIDs[] = {
eCSSPropertyExtra_x_auto_value,
eCSSProperty__moz_column_count,
eCSSProperty__moz_column_width
};
const int32_t numProps = NS_ARRAY_LENGTH(columnIDs);
nsCSSValue values[numProps];
int32_t found = ParseChoice(values, columnIDs, numProps);
if (found < 1 || !ExpectEndProperty()) {
return false;
}
if ((found & (1|2|4)) == (1|2|4) &&
values[0].GetUnit() == eCSSUnit_Auto) {
// We filled all 3 values, which is invalid
return false;
}
if ((found & 2) == 0) {
// Provide auto column-count
values[1].SetAutoValue();
}
if ((found & 4) == 0) {
// Provide auto column-width
values[2].SetAutoValue();
}
// Start at index 1 to skip the fake auto value.
for (int32_t index = 1; index < numProps; index++) {
AppendValue(columnIDs[index], values[index]);
}
return true;
}
#define VARIANT_CONTENT (VARIANT_STRING | VARIANT_URL | VARIANT_COUNTER | VARIANT_ATTR | \
VARIANT_KEYWORD)
bool
CSSParserImpl::ParseContent()
{
// We need to divide the 'content' keywords into two classes for
// ParseVariant's sake, so we can't just use nsCSSProps::kContentKTable.
static const int32_t kContentListKWs[] = {
eCSSKeyword_open_quote, NS_STYLE_CONTENT_OPEN_QUOTE,
eCSSKeyword_close_quote, NS_STYLE_CONTENT_CLOSE_QUOTE,
eCSSKeyword_no_open_quote, NS_STYLE_CONTENT_NO_OPEN_QUOTE,
eCSSKeyword_no_close_quote, NS_STYLE_CONTENT_NO_CLOSE_QUOTE,
eCSSKeyword_UNKNOWN,-1
};
static const int32_t kContentSolitaryKWs[] = {
eCSSKeyword__moz_alt_content, NS_STYLE_CONTENT_ALT_CONTENT,
eCSSKeyword_UNKNOWN,-1
};
// Verify that these two lists add up to the size of
// nsCSSProps::kContentKTable.
NS_ABORT_IF_FALSE(nsCSSProps::kContentKTable[
ArrayLength(kContentListKWs) +
ArrayLength(kContentSolitaryKWs) - 4] ==
eCSSKeyword_UNKNOWN &&
nsCSSProps::kContentKTable[
ArrayLength(kContentListKWs) +
ArrayLength(kContentSolitaryKWs) - 3] == -1,
"content keyword tables out of sync");
nsCSSValue value;
if (ParseVariant(value, VARIANT_HMK | VARIANT_NONE,
kContentSolitaryKWs)) {
// 'inherit', 'initial', 'normal', 'none', and 'alt-content' must be alone
if (!ExpectEndProperty()) {
return false;
}
} else {
nsCSSValueList* cur = value.SetListValue();
for (;;) {
if (!ParseVariant(cur->mValue, VARIANT_CONTENT, kContentListKWs)) {
return false;
}
if (CheckEndProperty()) {
break;
}
cur->mNext = new nsCSSValueList;
cur = cur->mNext;
}
}
AppendValue(eCSSProperty_content, value);
return true;
}
bool
CSSParserImpl::ParseCounterData(nsCSSProperty aPropID)
{
nsCSSValue value;
if (!ParseVariant(value, VARIANT_INHERIT | VARIANT_NONE, nullptr)) {
if (!GetToken(true) || mToken.mType != eCSSToken_Ident) {
return false;
}
nsCSSValuePairList *cur = value.SetPairListValue();
for (;;) {
cur->mXValue.SetStringValue(mToken.mIdent, eCSSUnit_Ident);
if (!GetToken(true)) {
break;
}
if (mToken.mType == eCSSToken_Number && mToken.mIntegerValid) {
cur->mYValue.SetIntValue(mToken.mInteger, eCSSUnit_Integer);
} else {
UngetToken();
}
if (CheckEndProperty()) {
break;
}
if (!GetToken(true) || mToken.mType != eCSSToken_Ident) {
return false;
}
cur->mNext = new nsCSSValuePairList;
cur = cur->mNext;
}
}
AppendValue(aPropID, value);
return true;
}
bool
CSSParserImpl::ParseCursor()
{
nsCSSValue value;
if (ParseVariant(value, VARIANT_INHERIT, nullptr)) {
// 'inherit' and 'initial' must be alone
if (!ExpectEndProperty()) {
return false;
}
} else {
nsCSSValueList* cur = value.SetListValue();
for (;;) {
if (!ParseVariant(cur->mValue, VARIANT_UK, nsCSSProps::kCursorKTable)) {
return false;
}
if (cur->mValue.GetUnit() != eCSSUnit_URL) { // keyword must be last
if (ExpectEndProperty()) {
break;
}
return false;
}
// We have a URL, so make a value array with three values.
nsRefPtr<nsCSSValue::Array> val = nsCSSValue::Array::Create(3);
val->Item(0) = cur->mValue;
// Parse optional x and y position of cursor hotspot (css3-ui).
if (ParseVariant(val->Item(1), VARIANT_NUMBER, nullptr)) {
// If we have one number, we must have two.
if (!ParseVariant(val->Item(2), VARIANT_NUMBER, nullptr)) {
return false;
}
}
cur->mValue.SetArrayValue(val, eCSSUnit_Array);
if (!ExpectSymbol(',', true)) { // url must not be last
return false;
}
cur->mNext = new nsCSSValueList;
cur = cur->mNext;
}
}
AppendValue(eCSSProperty_cursor, value);
return true;
}
bool
CSSParserImpl::ParseFont()
{
static const nsCSSProperty fontIDs[] = {
eCSSProperty_font_style,
eCSSProperty_font_variant,
eCSSProperty_font_weight
};
nsCSSValue family;
if (ParseVariant(family, VARIANT_HK, nsCSSProps::kFontKTable)) {
if (ExpectEndProperty()) {
if (eCSSUnit_Inherit == family.GetUnit() ||
eCSSUnit_Initial == family.GetUnit()) {
AppendValue(eCSSProperty__x_system_font, nsCSSValue(eCSSUnit_None));
AppendValue(eCSSProperty_font_family, family);
AppendValue(eCSSProperty_font_style, family);
AppendValue(eCSSProperty_font_variant, family);
AppendValue(eCSSProperty_font_weight, family);
AppendValue(eCSSProperty_font_size, family);
AppendValue(eCSSProperty_line_height, family);
AppendValue(eCSSProperty_font_stretch, family);
AppendValue(eCSSProperty_font_size_adjust, family);
AppendValue(eCSSProperty_font_feature_settings, family);
AppendValue(eCSSProperty_font_language_override, family);
AppendValue(eCSSProperty_font_kerning, family);
AppendValue(eCSSProperty_font_synthesis, family);
AppendValue(eCSSProperty_font_variant_alternates, family);
AppendValue(eCSSProperty_font_variant_caps, family);
AppendValue(eCSSProperty_font_variant_east_asian, family);
AppendValue(eCSSProperty_font_variant_ligatures, family);
AppendValue(eCSSProperty_font_variant_numeric, family);
AppendValue(eCSSProperty_font_variant_position, family);
}
else {
AppendValue(eCSSProperty__x_system_font, family);
nsCSSValue systemFont(eCSSUnit_System_Font);
AppendValue(eCSSProperty_font_family, systemFont);
AppendValue(eCSSProperty_font_style, systemFont);
AppendValue(eCSSProperty_font_variant, systemFont);
AppendValue(eCSSProperty_font_weight, systemFont);
AppendValue(eCSSProperty_font_size, systemFont);
AppendValue(eCSSProperty_line_height, systemFont);
AppendValue(eCSSProperty_font_stretch, systemFont);
AppendValue(eCSSProperty_font_size_adjust, systemFont);
AppendValue(eCSSProperty_font_feature_settings, systemFont);
AppendValue(eCSSProperty_font_language_override, systemFont);
AppendValue(eCSSProperty_font_kerning, systemFont);
AppendValue(eCSSProperty_font_synthesis, systemFont);
AppendValue(eCSSProperty_font_variant_alternates, systemFont);
AppendValue(eCSSProperty_font_variant_caps, systemFont);
AppendValue(eCSSProperty_font_variant_east_asian, systemFont);
AppendValue(eCSSProperty_font_variant_ligatures, systemFont);
AppendValue(eCSSProperty_font_variant_numeric, systemFont);
AppendValue(eCSSProperty_font_variant_position, systemFont);
}
return true;
}
return false;
}
// Get optional font-style, font-variant and font-weight (in any order)
const int32_t numProps = 3;
nsCSSValue values[numProps];
int32_t found = ParseChoice(values, fontIDs, numProps);
if ((found < 0) || (eCSSUnit_Inherit == values[0].GetUnit()) ||
(eCSSUnit_Initial == values[0].GetUnit())) { // illegal data
return false;
}
if ((found & 1) == 0) {
// Provide default font-style
values[0].SetIntValue(NS_FONT_STYLE_NORMAL, eCSSUnit_Enumerated);
}
if ((found & 2) == 0) {
// Provide default font-variant
values[1].SetIntValue(NS_FONT_VARIANT_NORMAL, eCSSUnit_Enumerated);
}
if ((found & 4) == 0) {
// Provide default font-weight
values[2].SetIntValue(NS_FONT_WEIGHT_NORMAL, eCSSUnit_Enumerated);
}
// Get mandatory font-size
nsCSSValue size;
if (! ParseVariant(size, VARIANT_KEYWORD | VARIANT_LP, nsCSSProps::kFontSizeKTable)) {
return false;
}
// Get optional "/" line-height
nsCSSValue lineHeight;
if (ExpectSymbol('/', true)) {
if (! ParseNonNegativeVariant(lineHeight,
VARIANT_NUMBER | VARIANT_LP | VARIANT_NORMAL,
nullptr)) {
return false;
}
}
else {
lineHeight.SetNormalValue();
}
// Get final mandatory font-family
nsAutoParseCompoundProperty compound(this);
if (ParseFamily(family)) {
if ((eCSSUnit_Inherit != family.GetUnit()) && (eCSSUnit_Initial != family.GetUnit()) &&
ExpectEndProperty()) {
AppendValue(eCSSProperty__x_system_font, nsCSSValue(eCSSUnit_None));
AppendValue(eCSSProperty_font_family, family);
AppendValue(eCSSProperty_font_style, values[0]);
AppendValue(eCSSProperty_font_variant, values[1]);
AppendValue(eCSSProperty_font_weight, values[2]);
AppendValue(eCSSProperty_font_size, size);
AppendValue(eCSSProperty_line_height, lineHeight);
AppendValue(eCSSProperty_font_stretch,
nsCSSValue(NS_FONT_STRETCH_NORMAL, eCSSUnit_Enumerated));
AppendValue(eCSSProperty_font_size_adjust, nsCSSValue(eCSSUnit_None));
AppendValue(eCSSProperty_font_feature_settings, nsCSSValue(eCSSUnit_Normal));
AppendValue(eCSSProperty_font_language_override, nsCSSValue(eCSSUnit_Normal));
AppendValue(eCSSProperty_font_kerning,
nsCSSValue(NS_FONT_KERNING_AUTO, eCSSUnit_Enumerated));
AppendValue(eCSSProperty_font_synthesis,
nsCSSValue(NS_FONT_SYNTHESIS_WEIGHT | NS_FONT_SYNTHESIS_STYLE,
eCSSUnit_Enumerated));
AppendValue(eCSSProperty_font_variant_alternates,
nsCSSValue(eCSSUnit_Normal));
AppendValue(eCSSProperty_font_variant_caps, nsCSSValue(eCSSUnit_Normal));
AppendValue(eCSSProperty_font_variant_east_asian,
nsCSSValue(eCSSUnit_Normal));
AppendValue(eCSSProperty_font_variant_ligatures,
nsCSSValue(eCSSUnit_Normal));
AppendValue(eCSSProperty_font_variant_numeric,
nsCSSValue(eCSSUnit_Normal));
AppendValue(eCSSProperty_font_variant_position,
nsCSSValue(eCSSUnit_Normal));
return true;
}
}
return false;
}
bool
CSSParserImpl::ParseFontSynthesis(nsCSSValue& aValue)
{
if (!ParseVariant(aValue, VARIANT_HK | VARIANT_NONE,
nsCSSProps::kFontSynthesisKTable)) {
return false;
}
// first value 'none' ==> done
if (eCSSUnit_None == aValue.GetUnit() ||
eCSSUnit_Initial == aValue.GetUnit() ||
eCSSUnit_Inherit == aValue.GetUnit())
{
return true;
}
// look for a second value
int32_t intValue = aValue.GetIntValue();
nsCSSValue nextValue;
if (ParseEnum(nextValue, nsCSSProps::kFontSynthesisKTable)) {
int32_t nextIntValue = nextValue.GetIntValue();
if (nextIntValue & intValue) {
return false;
}
aValue.SetIntValue(nextIntValue | intValue, eCSSUnit_Enumerated);
}
return true;
}
// font-variant-alternates allows for a combination of multiple
// simple enumerated values and functional values. Functional values have
// parameter lists with one or more idents which are later resolved
// based on values defined in @font-feature-value rules.
//
// font-variant-alternates: swash(flowing), historical-forms, styleset(alt-g, alt-m);
//
// So for this the nsCSSValue is set to a pair value, with one
// value for a bitmask of both simple and functional property values
// and another value containing a ValuePairList with lists of idents
// for each functional property value.
//
// pairValue
// o intValue
// NS_FONT_VARIANT_ALTERNATES_SWASH |
// NS_FONT_VARIANT_ALTERNATES_STYLESET
// o valuePairList, each element with
// - intValue - indicates which alternate
// - string or valueList of strings
//
// Note: when only 'historical-forms' is specified, there are no
// functional values to store, in which case the valuePairList is a
// single element dummy list. In all other cases, the length of the
// list will match the number of functional values.
#define MAX_ALLOWED_FEATURES 512
bool
CSSParserImpl::ParseSingleAlternate(int32_t& aWhichFeature,
nsCSSValue& aValue)
{
if (!GetToken(true)) {
return false;
}
bool isIdent = (mToken.mType == eCSSToken_Ident);
if (mToken.mType != eCSSToken_Function && !isIdent) {
UngetToken();
return false;
}
// ident ==> simple enumerated prop val (e.g. historical-forms)
// function ==> e.g. swash(flowing) styleset(alt-g, alt-m)
nsCSSKeyword keyword = nsCSSKeywords::LookupKeyword(mToken.mIdent);
if (!(eCSSKeyword_UNKNOWN < keyword &&
nsCSSProps::FindKeyword(keyword,
(isIdent ?
nsCSSProps::kFontVariantAlternatesKTable :
nsCSSProps::kFontVariantAlternatesFuncsKTable),
aWhichFeature)))
{
// failed, pop token
UngetToken();
return false;
}
if (isIdent) {
aValue.SetIntValue(aWhichFeature, eCSSUnit_Enumerated);
return true;
}
uint16_t maxElems = 1;
if (keyword == eCSSKeyword_styleset ||
keyword == eCSSKeyword_character_variant) {
maxElems = MAX_ALLOWED_FEATURES;
}
return ParseFunction(keyword, nullptr, VARIANT_IDENTIFIER,
1, maxElems, aValue);
}
bool
CSSParserImpl::ParseFontVariantAlternates(nsCSSValue& aValue)
{
if (ParseVariant(aValue, VARIANT_INHERIT | VARIANT_NORMAL, nullptr)) {
return true;
}
// iterate through parameters
nsCSSValue listValue;
int32_t feature, featureFlags = 0;
// if no functional values, this may be a list with a single, unused element
listValue.SetListValue();
nsCSSValueList* list = nullptr;
nsCSSValue value;
while (ParseSingleAlternate(feature, value)) {
// check to make sure value not already set
if (feature == 0 ||
feature & featureFlags) {
return false;
}
featureFlags |= feature;
// if function, need to add to the list of functions
if (value.GetUnit() == eCSSUnit_Function) {
if (!list) {
list = listValue.GetListValue();
} else {
list->mNext = new nsCSSValueList;
list = list->mNext;
}
list->mValue = value;
}
}
nsCSSValue featureValue;
featureValue.SetIntValue(featureFlags, eCSSUnit_Enumerated);
aValue.SetPairValue(featureValue, listValue);
return true;
}
#define MASK_END_VALUE -1
// aMasks - array of masks for mutually-exclusive property values,
// e.g. proportial-nums, tabular-nums
bool
CSSParserImpl::ParseBitmaskValues(nsCSSValue& aValue,
const int32_t aKeywordTable[],
const int32_t aMasks[])
{
if (!ParseVariant(aValue, VARIANT_HMK, aKeywordTable)) {
return false;
}
// first value 'normal', 'inherit', 'initial' ==> done
if (eCSSUnit_Normal == aValue.GetUnit() ||
eCSSUnit_Initial == aValue.GetUnit() ||
eCSSUnit_Inherit == aValue.GetUnit())
{
return true;
}
// look for more values
nsCSSValue nextValue;
int32_t mergedValue = aValue.GetIntValue();
while (ParseEnum(nextValue, aKeywordTable))
{
int32_t nextIntValue = nextValue.GetIntValue();
// check to make sure value not already set
if (nextIntValue & mergedValue) {
return false;
}
const int32_t *m = aMasks;
int32_t c = 0;
while (*m != MASK_END_VALUE) {
if (*m & nextIntValue) {
c = mergedValue & *m;
break;
}
m++;
}
if (c) {
return false;
}
mergedValue |= nextIntValue;
}
aValue.SetIntValue(mergedValue, eCSSUnit_Enumerated);
return true;
}
static const int32_t maskEastAsian[] = {
NS_FONT_VARIANT_EAST_ASIAN_VARIANT_MASK,
NS_FONT_VARIANT_EAST_ASIAN_WIDTH_MASK,
MASK_END_VALUE
};
bool
CSSParserImpl::ParseFontVariantEastAsian(nsCSSValue& aValue)
{
NS_ASSERTION(maskEastAsian[NS_ARRAY_LENGTH(maskEastAsian) - 1] ==
MASK_END_VALUE,
"incorrectly terminated array");
return ParseBitmaskValues(aValue, nsCSSProps::kFontVariantEastAsianKTable,
maskEastAsian);
}
static const int32_t maskLigatures[] = {
NS_FONT_VARIANT_LIGATURES_COMMON_MASK,
NS_FONT_VARIANT_LIGATURES_DISCRETIONARY_MASK,
NS_FONT_VARIANT_LIGATURES_HISTORICAL_MASK,
NS_FONT_VARIANT_LIGATURES_CONTEXTUAL_MASK,
MASK_END_VALUE
};
bool
CSSParserImpl::ParseFontVariantLigatures(nsCSSValue& aValue)
{
NS_ASSERTION(maskLigatures[NS_ARRAY_LENGTH(maskLigatures) - 1] ==
MASK_END_VALUE,
"incorrectly terminated array");
return ParseBitmaskValues(aValue, nsCSSProps::kFontVariantLigaturesKTable,
maskLigatures);
}
static const int32_t maskNumeric[] = {
NS_FONT_VARIANT_NUMERIC_FIGURE_MASK,
NS_FONT_VARIANT_NUMERIC_SPACING_MASK,
NS_FONT_VARIANT_NUMERIC_FRACTION_MASK,
MASK_END_VALUE
};
bool
CSSParserImpl::ParseFontVariantNumeric(nsCSSValue& aValue)
{
NS_ASSERTION(maskNumeric[NS_ARRAY_LENGTH(maskNumeric) - 1] ==
MASK_END_VALUE,
"incorrectly terminated array");
return ParseBitmaskValues(aValue, nsCSSProps::kFontVariantNumericKTable,
maskNumeric);
}
bool
CSSParserImpl::ParseFontWeight(nsCSSValue& aValue)
{
if (ParseVariant(aValue, VARIANT_HKI | VARIANT_SYSFONT,
nsCSSProps::kFontWeightKTable)) {
if (eCSSUnit_Integer == aValue.GetUnit()) { // ensure unit value
int32_t intValue = aValue.GetIntValue();
if ((100 <= intValue) &&
(intValue <= 900) &&
(0 == (intValue % 100))) {
return true;
} else {
UngetToken();
return false;
}
}
return true;
}
return false;
}
bool
CSSParserImpl::ParseOneFamily(nsAString& aFamily, bool& aOneKeyword)
{
if (!GetToken(true))
return false;
nsCSSToken* tk = &mToken;
aOneKeyword = false;
if (eCSSToken_Ident == tk->mType) {
aOneKeyword = true;
aFamily.Append(tk->mIdent);
for (;;) {
if (!GetToken(false))
break;
if (eCSSToken_Ident == tk->mType) {
aOneKeyword = false;
aFamily.Append(tk->mIdent);
} else if (eCSSToken_Whitespace == tk->mType) {
// Lookahead one token and drop whitespace if we are ending the
// font name.
if (!GetToken(true))
break;
UngetToken();
if (eCSSToken_Ident == tk->mType)
aFamily.Append(PRUnichar(' '));
else
break;
} else {
UngetToken();
break;
}
}
return true;
} else if (eCSSToken_String == tk->mType) {
aFamily.Append(tk->mSymbol); // replace the quotes
aFamily.Append(tk->mIdent); // XXX What if it had escaped quotes?
aFamily.Append(tk->mSymbol);
return true;
} else {
UngetToken();
return false;
}
}
bool
CSSParserImpl::ParseFamily(nsCSSValue& aValue)
{
nsAutoString family;
bool single;
// keywords only have meaning in the first position
if (!ParseOneFamily(family, single))
return false;
// check for keywords, but only when keywords appear by themselves
// i.e. not in compounds such as font-family: default blah;
if (single) {
nsCSSKeyword keyword = nsCSSKeywords::LookupKeyword(family);
if (keyword == eCSSKeyword_inherit) {
aValue.SetInheritValue();
return true;
}
// 605231 - don't parse unquoted 'default' reserved keyword
if (keyword == eCSSKeyword_default) {
return false;
}
if (keyword == eCSSKeyword__moz_initial || keyword == eCSSKeyword_initial) {
aValue.SetInitialValue();
return true;
}
if (keyword == eCSSKeyword__moz_use_system_font &&
!IsParsingCompoundProperty()) {
aValue.SetSystemFontValue();
return true;
}
}
for (;;) {
if (!ExpectSymbol(',', true))
break;
family.Append(PRUnichar(','));
nsAutoString nextFamily;
if (!ParseOneFamily(nextFamily, single))
return false;
// at this point unquoted keywords are not allowed
// as font family names but can appear within names
if (single) {
nsCSSKeyword keyword = nsCSSKeywords::LookupKeyword(nextFamily);
switch (keyword) {
case eCSSKeyword_inherit:
case eCSSKeyword_initial:
case eCSSKeyword_default:
case eCSSKeyword__moz_initial:
case eCSSKeyword__moz_use_system_font:
return false;
default:
break;
}
}
family.Append(nextFamily);
}
if (family.IsEmpty()) {
return false;
}
aValue.SetStringValue(family, eCSSUnit_Families);
return true;
}
// src: ( uri-src | local-src ) (',' ( uri-src | local-src ) )*
// uri-src: uri [ 'format(' string ( ',' string )* ')' ]
// local-src: 'local(' ( string | ident ) ')'
bool
CSSParserImpl::ParseFontSrc(nsCSSValue& aValue)
{
// could we maybe turn nsCSSValue::Array into InfallibleTArray<nsCSSValue>?
InfallibleTArray<nsCSSValue> values;
nsCSSValue cur;
for (;;) {
if (!GetToken(true))
break;
if (mToken.mType == eCSSToken_URL) {
SetValueToURL(cur, mToken.mIdent);
values.AppendElement(cur);
if (!ParseFontSrcFormat(values))
return false;
} else if (mToken.mType == eCSSToken_Function &&
mToken.mIdent.LowerCaseEqualsLiteral("local")) {
// css3-fonts does not specify a formal grammar for local().
// The text permits both unquoted identifiers and quoted
// strings. We resolve this ambiguity in the spec by
// assuming that the appropriate production is a single
// <family-name>, possibly surrounded by whitespace.
nsAutoString family;
bool single;
if (!ParseOneFamily(family, single)) {
SkipUntil(')');
return false;
}
if (!ExpectSymbol(')', true)) {
SkipUntil(')');
return false;
}
// the style parameters to the nsFont constructor are ignored,
// because it's only being used to call EnumerateFamilies
nsFont font(family, 0, 0, 0, 0, 0, 0);
ExtractFirstFamilyData dat;
font.EnumerateFamilies(ExtractFirstFamily, (void*) &dat);
if (!dat.mGood)
return false;
cur.SetStringValue(dat.mFamilyName, eCSSUnit_Local_Font);
values.AppendElement(cur);
} else {
// We don't know what to do with this token; unget it and error out
UngetToken();
return false;
}
if (!ExpectSymbol(',', true))
break;
}
if (values.Length() == 0)
return false;
nsRefPtr<nsCSSValue::Array> srcVals
= nsCSSValue::Array::Create(values.Length());
uint32_t i;
for (i = 0; i < values.Length(); i++)
srcVals->Item(i) = values[i];
aValue.SetArrayValue(srcVals, eCSSUnit_Array);
return true;
}
bool
CSSParserImpl::ParseFontSrcFormat(InfallibleTArray<nsCSSValue> & values)
{
if (!GetToken(true))
return true; // EOF harmless here
if (mToken.mType != eCSSToken_Function ||
!mToken.mIdent.LowerCaseEqualsLiteral("format")) {
UngetToken();
return true;
}
do {
if (!GetToken(true))
return false; // EOF - no need for SkipUntil
if (mToken.mType != eCSSToken_String) {
UngetToken();
SkipUntil(')');
return false;
}
nsCSSValue cur(mToken.mIdent, eCSSUnit_Font_Format);
values.AppendElement(cur);
} while (ExpectSymbol(',', true));
if (!ExpectSymbol(')', true)) {
SkipUntil(')');
return false;
}
return true;
}
// font-ranges: urange ( ',' urange )*
bool
CSSParserImpl::ParseFontRanges(nsCSSValue& aValue)
{
InfallibleTArray<uint32_t> ranges;
for (;;) {
if (!GetToken(true))
break;
if (mToken.mType != eCSSToken_URange) {
UngetToken();
break;
}
// An invalid range token is a parsing error, causing the entire
// descriptor to be ignored.
if (!mToken.mIntegerValid)
return false;
uint32_t low = mToken.mInteger;
uint32_t high = mToken.mInteger2;
// A range that descends, or a range that is entirely outside the
// current range of Unicode (U+0-10FFFF) is ignored, but does not
// invalidate the descriptor. A range that straddles the high end
// is clipped.
if (low <= 0x10FFFF && low <= high) {
if (high > 0x10FFFF)
high = 0x10FFFF;
ranges.AppendElement(low);
ranges.AppendElement(high);
}
if (!ExpectSymbol(',', true))
break;
}
if (ranges.Length() == 0)
return false;
nsRefPtr<nsCSSValue::Array> srcVals
= nsCSSValue::Array::Create(ranges.Length());
for (uint32_t i = 0; i < ranges.Length(); i++)
srcVals->Item(i).SetIntValue(ranges[i], eCSSUnit_Integer);
aValue.SetArrayValue(srcVals, eCSSUnit_Array);
return true;
}
// font-feature-settings: normal | <feature-tag-value> [, <feature-tag-value>]*
// <feature-tag-value> = <string> [ <integer> | on | off ]?
// minimum - "tagx", "tagy", "tagz"
// edge error case - "tagx" on 1, "tagx" "tagy", "tagx" -1, "tagx" big
// pair value is always x = string, y = int
// font feature tags must be four ASCII characters
#define FEATURE_TAG_LENGTH 4
static bool
ValidFontFeatureTag(const nsString& aTag)
{
if (aTag.Length() != FEATURE_TAG_LENGTH) {
return false;
}
uint32_t i;
for (i = 0; i < FEATURE_TAG_LENGTH; i++) {
uint32_t ch = aTag[i];
if (ch < 0x20 || ch > 0x7e) {
return false;
}
}
return true;
}
bool
CSSParserImpl::ParseFontFeatureSettings(nsCSSValue& aValue)
{
if (ParseVariant(aValue, VARIANT_INHERIT | VARIANT_NORMAL, nullptr)) {
return true;
}
nsCSSValuePairList *cur = aValue.SetPairListValue();
for (;;) {
// feature tag
if (!GetToken(true)) {
return false;
}
if (mToken.mType != eCSSToken_String ||
!ValidFontFeatureTag(mToken.mIdent)) {
UngetToken();
return false;
}
cur->mXValue.SetStringValue(mToken.mIdent, eCSSUnit_String);
if (!GetToken(true)) {
cur->mYValue.SetIntValue(1, eCSSUnit_Integer);
break;
}
// optional value or on/off keyword
if (mToken.mType == eCSSToken_Number && mToken.mIntegerValid &&
mToken.mInteger >= 0) {
cur->mYValue.SetIntValue(mToken.mInteger, eCSSUnit_Integer);
} else if (mToken.mType == eCSSToken_Ident &&
mToken.mIdent.LowerCaseEqualsLiteral("on")) {
cur->mYValue.SetIntValue(1, eCSSUnit_Integer);
} else if (mToken.mType == eCSSToken_Ident &&
mToken.mIdent.LowerCaseEqualsLiteral("off")) {
cur->mYValue.SetIntValue(0, eCSSUnit_Integer);
} else {
// something other than value/on/off, set default value
cur->mYValue.SetIntValue(1, eCSSUnit_Integer);
UngetToken();
}
if (!ExpectSymbol(',', true)) {
break;
}
cur->mNext = new nsCSSValuePairList;
cur = cur->mNext;
}
return true;
}
bool
CSSParserImpl::ParseListStyle()
{
// 'list-style' can accept 'none' for two different subproperties,
// 'list-style-type' and 'list-style-position'. In order to accept
// 'none' as the value of either but still allow another value for
// either, we need to ensure that the first 'none' we find gets
// allocated to a dummy property instead.
static const nsCSSProperty listStyleIDs[] = {
eCSSPropertyExtra_x_none_value,
eCSSProperty_list_style_type,
eCSSProperty_list_style_position,
eCSSProperty_list_style_image
};
nsCSSValue values[NS_ARRAY_LENGTH(listStyleIDs)];
int32_t found =
ParseChoice(values, listStyleIDs, ArrayLength(listStyleIDs));
if (found < 1 || !ExpectEndProperty()) {
return false;
}
if ((found & (1|2|8)) == (1|2|8)) {
if (values[0].GetUnit() == eCSSUnit_None) {
// We found a 'none' plus another value for both of
// 'list-style-type' and 'list-style-image'. This is a parse
// error, since the 'none' has to count for at least one of them.
return false;
} else {
NS_ASSERTION(found == (1|2|4|8) && values[0] == values[1] &&
values[0] == values[2] && values[0] == values[3],
"should be a special value");
}
}
// Provide default values
if ((found & 2) == 0) {
if (found & 1) {
values[1].SetIntValue(NS_STYLE_LIST_STYLE_NONE, eCSSUnit_Enumerated);
} else {
values[1].SetIntValue(NS_STYLE_LIST_STYLE_DISC, eCSSUnit_Enumerated);
}
}
if ((found & 4) == 0) {
values[2].SetIntValue(NS_STYLE_LIST_STYLE_POSITION_OUTSIDE,
eCSSUnit_Enumerated);
}
if ((found & 8) == 0) {
values[3].SetNoneValue();
}
// Start at 1 to avoid appending fake value.
for (uint32_t index = 1; index < ArrayLength(listStyleIDs); ++index) {
AppendValue(listStyleIDs[index], values[index]);
}
return true;
}
bool
CSSParserImpl::ParseMargin()
{
static const nsCSSProperty kMarginSideIDs[] = {
eCSSProperty_margin_top,
eCSSProperty_margin_right_value,
eCSSProperty_margin_bottom,
eCSSProperty_margin_left_value
};
static const nsCSSProperty kMarginSources[] = {
eCSSProperty_margin_left_ltr_source,
eCSSProperty_margin_left_rtl_source,
eCSSProperty_margin_right_ltr_source,
eCSSProperty_margin_right_rtl_source,
eCSSProperty_UNKNOWN
};
// do this now, in case 4 values weren't specified
InitBoxPropsAsPhysical(kMarginSources);
return ParseBoxProperties(kMarginSideIDs);
}
bool
CSSParserImpl::ParseMarks(nsCSSValue& aValue)
{
if (ParseVariant(aValue, VARIANT_HK, nsCSSProps::kPageMarksKTable)) {
if (eCSSUnit_Enumerated == aValue.GetUnit()) {
if (NS_STYLE_PAGE_MARKS_NONE != aValue.GetIntValue() &&
false == CheckEndProperty()) {
nsCSSValue second;
if (ParseEnum(second, nsCSSProps::kPageMarksKTable)) {
// 'none' keyword in conjuction with others is not allowed
if (NS_STYLE_PAGE_MARKS_NONE != second.GetIntValue()) {
aValue.SetIntValue(aValue.GetIntValue() | second.GetIntValue(),
eCSSUnit_Enumerated);
return true;
}
}
return false;
}
}
return true;
}
return false;
}
bool
CSSParserImpl::ParseOutline()
{
const int32_t numProps = 3;
static const nsCSSProperty kOutlineIDs[] = {
eCSSProperty_outline_color,
eCSSProperty_outline_style,
eCSSProperty_outline_width
};
nsCSSValue values[numProps];
int32_t found = ParseChoice(values, kOutlineIDs, numProps);
if ((found < 1) || (false == ExpectEndProperty())) {
return false;
}
// Provide default values
if ((found & 1) == 0) { // Provide default outline-color
values[0].SetIntValue(NS_STYLE_COLOR_MOZ_USE_TEXT_COLOR, eCSSUnit_Enumerated);
}
if ((found & 2) == 0) { // Provide default outline-style
values[1].SetIntValue(NS_STYLE_BORDER_STYLE_NONE, eCSSUnit_Enumerated);
}
if ((found & 4) == 0) { // Provide default outline-width
values[2].SetIntValue(NS_STYLE_BORDER_WIDTH_MEDIUM, eCSSUnit_Enumerated);
}
int32_t index;
for (index = 0; index < numProps; index++) {
AppendValue(kOutlineIDs[index], values[index]);
}
return true;
}
bool
CSSParserImpl::ParseOverflow()
{
nsCSSValue overflow;
if (!ParseVariant(overflow, VARIANT_HK,
nsCSSProps::kOverflowKTable) ||
!ExpectEndProperty())
return false;
nsCSSValue overflowX(overflow);
nsCSSValue overflowY(overflow);
if (eCSSUnit_Enumerated == overflow.GetUnit())
switch(overflow.GetIntValue()) {
case NS_STYLE_OVERFLOW_SCROLLBARS_HORIZONTAL:
overflowX.SetIntValue(NS_STYLE_OVERFLOW_SCROLL, eCSSUnit_Enumerated);
overflowY.SetIntValue(NS_STYLE_OVERFLOW_HIDDEN, eCSSUnit_Enumerated);
break;
case NS_STYLE_OVERFLOW_SCROLLBARS_VERTICAL:
overflowX.SetIntValue(NS_STYLE_OVERFLOW_HIDDEN, eCSSUnit_Enumerated);
overflowY.SetIntValue(NS_STYLE_OVERFLOW_SCROLL, eCSSUnit_Enumerated);
break;
}
AppendValue(eCSSProperty_overflow_x, overflowX);
AppendValue(eCSSProperty_overflow_y, overflowY);
return true;
}
bool
CSSParserImpl::ParsePadding()
{
static const nsCSSProperty kPaddingSideIDs[] = {
eCSSProperty_padding_top,
eCSSProperty_padding_right_value,
eCSSProperty_padding_bottom,
eCSSProperty_padding_left_value
};
static const nsCSSProperty kPaddingSources[] = {
eCSSProperty_padding_left_ltr_source,
eCSSProperty_padding_left_rtl_source,
eCSSProperty_padding_right_ltr_source,
eCSSProperty_padding_right_rtl_source,
eCSSProperty_UNKNOWN
};
// do this now, in case 4 values weren't specified
InitBoxPropsAsPhysical(kPaddingSources);
return ParseBoxProperties(kPaddingSideIDs);
}
bool
CSSParserImpl::ParseQuotes()
{
nsCSSValue value;
if (!ParseVariant(value, VARIANT_HOS, nullptr)) {
return false;
}
if (value.GetUnit() != eCSSUnit_String) {
if (!ExpectEndProperty()) {
return false;
}
} else {
nsCSSValue open = value;
nsCSSValuePairList* quotes = value.SetPairListValue();
for (;;) {
quotes->mXValue = open;
// get mandatory close
if (!ParseVariant(quotes->mYValue, VARIANT_STRING, nullptr)) {
return false;
}
if (CheckEndProperty()) {
break;
}
// look for another open
if (!ParseVariant(open, VARIANT_STRING, nullptr)) {
return false;
}
quotes->mNext = new nsCSSValuePairList;
quotes = quotes->mNext;
}
}
AppendValue(eCSSProperty_quotes, value);
return true;
}
bool
CSSParserImpl::ParseSize()
{
nsCSSValue width, height;
if (!ParseVariant(width, VARIANT_AHKL, nsCSSProps::kPageSizeKTable)) {
return false;
}
if (width.IsLengthUnit()) {
ParseVariant(height, VARIANT_LENGTH, nullptr);
}
if (!ExpectEndProperty()) {
return false;
}
if (width == height || height.GetUnit() == eCSSUnit_Null) {
AppendValue(eCSSProperty_size, width);
} else {
nsCSSValue pair;
pair.SetPairValue(width, height);
AppendValue(eCSSProperty_size, pair);
}
return true;
}
bool
CSSParserImpl::ParseTextDecoration()
{
enum {
eDecorationNone = NS_STYLE_TEXT_DECORATION_LINE_NONE,
eDecorationUnderline = NS_STYLE_TEXT_DECORATION_LINE_UNDERLINE,
eDecorationOverline = NS_STYLE_TEXT_DECORATION_LINE_OVERLINE,
eDecorationLineThrough = NS_STYLE_TEXT_DECORATION_LINE_LINE_THROUGH,
eDecorationBlink = NS_STYLE_TEXT_DECORATION_LINE_BLINK,
eDecorationPrefAnchors = NS_STYLE_TEXT_DECORATION_LINE_PREF_ANCHORS
};
MOZ_STATIC_ASSERT((eDecorationNone ^ eDecorationUnderline ^
eDecorationOverline ^ eDecorationLineThrough ^
eDecorationBlink ^ eDecorationPrefAnchors) ==
(eDecorationNone | eDecorationUnderline |
eDecorationOverline | eDecorationLineThrough |
eDecorationBlink | eDecorationPrefAnchors),
"text decoration constants need to be bitmasks");
static const int32_t kTextDecorationKTable[] = {
eCSSKeyword_none, eDecorationNone,
eCSSKeyword_underline, eDecorationUnderline,
eCSSKeyword_overline, eDecorationOverline,
eCSSKeyword_line_through, eDecorationLineThrough,
eCSSKeyword_blink, eDecorationBlink,
eCSSKeyword__moz_anchor_decoration, eDecorationPrefAnchors,
eCSSKeyword_UNKNOWN,-1
};
nsCSSValue value;
if (!ParseVariant(value, VARIANT_HK, kTextDecorationKTable)) {
return false;
}
nsCSSValue blink, line, style, color;
switch (value.GetUnit()) {
case eCSSUnit_Enumerated: {
// We shouldn't accept decoration line style and color via
// text-decoration.
color.SetIntValue(NS_STYLE_COLOR_MOZ_USE_TEXT_COLOR,
eCSSUnit_Enumerated);
style.SetIntValue(NS_STYLE_TEXT_DECORATION_STYLE_SOLID,
eCSSUnit_Enumerated);
int32_t intValue = value.GetIntValue();
if (intValue == eDecorationNone) {
blink.SetIntValue(NS_STYLE_TEXT_BLINK_NONE, eCSSUnit_Enumerated);
line.SetIntValue(NS_STYLE_TEXT_DECORATION_LINE_NONE,
eCSSUnit_Enumerated);
break;
}
// look for more keywords
nsCSSValue keyword;
int32_t index;
for (index = 0; index < 3; index++) {
if (!ParseEnum(keyword, kTextDecorationKTable)) {
break;
}
int32_t newValue = keyword.GetIntValue();
if (newValue == eDecorationNone || newValue & intValue) {
// 'none' keyword in conjuction with others is not allowed, and
// duplicate keyword is not allowed.
return false;
}
intValue |= newValue;
}
blink.SetIntValue((intValue & eDecorationBlink) != 0 ?
NS_STYLE_TEXT_BLINK_BLINK : NS_STYLE_TEXT_BLINK_NONE,
eCSSUnit_Enumerated);
line.SetIntValue((intValue & ~eDecorationBlink), eCSSUnit_Enumerated);
break;
}
default:
blink = line = color = style = value;
break;
}
AppendValue(eCSSProperty_text_blink, blink);
AppendValue(eCSSProperty_text_decoration_line, line);
AppendValue(eCSSProperty_text_decoration_color, color);
AppendValue(eCSSProperty_text_decoration_style, style);
return true;
}
bool
CSSParserImpl::ParseTextDecorationLine(nsCSSValue& aValue)
{
if (ParseVariant(aValue, VARIANT_HK, nsCSSProps::kTextDecorationLineKTable)) {
if (eCSSUnit_Enumerated == aValue.GetUnit()) {
int32_t intValue = aValue.GetIntValue();
if (intValue != NS_STYLE_TEXT_DECORATION_LINE_NONE) {
// look for more keywords
nsCSSValue keyword;
int32_t index;
for (index = 0; index < 2; index++) {
if (ParseEnum(keyword, nsCSSProps::kTextDecorationLineKTable)) {
int32_t newValue = keyword.GetIntValue();
if (newValue == NS_STYLE_TEXT_DECORATION_LINE_NONE ||
newValue & intValue) {
// 'none' keyword in conjuction with others is not allowed, and
// duplicate keyword is not allowed.
return false;
}
intValue |= newValue;
}
else {
break;
}
}
aValue.SetIntValue(intValue, eCSSUnit_Enumerated);
}
}
return true;
}
return false;
}
bool
CSSParserImpl::ParseTextOverflow(nsCSSValue& aValue)
{
if (ParseVariant(aValue, VARIANT_INHERIT, nullptr)) {
// 'inherit' and 'initial' must be alone
return true;
}
nsCSSValue left;
if (!ParseVariant(left, VARIANT_KEYWORD | VARIANT_STRING,
nsCSSProps::kTextOverflowKTable))
return false;
nsCSSValue right;
if (ParseVariant(right, VARIANT_KEYWORD | VARIANT_STRING,
nsCSSProps::kTextOverflowKTable))
aValue.SetPairValue(left, right);
else {
aValue = left;
}
return true;
}
///////////////////////////////////////////////////////
// transform Parsing Implementation
/* Reads a function list of arguments. Do not call this function
* directly; it's mean to be caled from ParseFunction.
*/
bool
CSSParserImpl::ParseFunctionInternals(const int32_t aVariantMask[],
int32_t aVariantMaskAll,
uint16_t aMinElems,
uint16_t aMaxElems,
InfallibleTArray<nsCSSValue> &aOutput)
{
NS_ASSERTION((aVariantMask && !aVariantMaskAll) ||
(!aVariantMask && aVariantMaskAll),
"only one of the two variant mask parameters can be set");
for (uint16_t index = 0; index < aMaxElems; ++index) {
nsCSSValue newValue;
int32_t m = aVariantMaskAll ? aVariantMaskAll : aVariantMask[index];
if (!ParseVariant(newValue, m, nullptr)) {
return false;
}
aOutput.AppendElement(newValue);
// See whether to continue or whether to look for end of function.
if (!ExpectSymbol(',', true)) {
// We need to read the closing parenthesis, and also must take care
// that we haven't read too few symbols.
return ExpectSymbol(')', true) && (index + 1) >= aMinElems;
}
}
// If we're here, we finished looping without hitting the end, so we read too
// many elements.
return false;
}
/* Parses a function [ input of the form (a [, b]*) ] and stores it
* as an nsCSSValue that holds a function of the form
* function-name arg1 arg2 ... argN
*
* On error, the return value is false.
*
* @param aFunction The name of the function that we're reading.
* @param aAllowedTypes An array of values corresponding to the legal
* types for each element in the function. The zeroth element in the
* array corresponds to the first function parameter, etc. The length
* of this array _must_ be greater than or equal to aMaxElems or the
* behavior is undefined. If not null, aAllowTypesAll must be 0.
* @param aAllowedTypesAll If set, every element tested for these types
* @param aMinElems Minimum number of elements to read. Reading fewer than
* this many elements will result in the function failing.
* @param aMaxElems Maximum number of elements to read. Reading more than
* this many elements will result in the function failing.
* @param aValue (out) The value that was parsed.
*/
bool
CSSParserImpl::ParseFunction(nsCSSKeyword aFunction,
const int32_t aAllowedTypes[],
int32_t aAllowedTypesAll,
uint16_t aMinElems, uint16_t aMaxElems,
nsCSSValue &aValue)
{
NS_ASSERTION((aAllowedTypes && !aAllowedTypesAll) ||
(!aAllowedTypes && aAllowedTypesAll),
"only one of the two allowed type parameter can be set");
typedef InfallibleTArray<nsCSSValue>::size_type arrlen_t;
/* 2^16 - 2, so that if we have 2^16 - 2 transforms, we have 2^16 - 1
* elements stored in the the nsCSSValue::Array.
*/
static const arrlen_t MAX_ALLOWED_ELEMS = 0xFFFE;
/* Read in a list of values as an array, failing if we can't or if
* it's out of bounds.
*/
InfallibleTArray<nsCSSValue> foundValues;
if (!ParseFunctionInternals(aAllowedTypes, aAllowedTypesAll, aMinElems,
aMaxElems, foundValues)) {
return false;
}
/*
* In case the user has given us more than 2^16 - 2 arguments,
* we'll truncate them at 2^16 - 2 arguments.
*/
uint16_t numArgs = std::min(foundValues.Length(), MAX_ALLOWED_ELEMS);
nsRefPtr<nsCSSValue::Array> convertedArray =
aValue.InitFunction(aFunction, numArgs);
/* Copy things over. */
for (uint16_t index = 0; index < numArgs; ++index)
convertedArray->Item(index + 1) = foundValues[static_cast<arrlen_t>(index)];
/* Return it! */
return true;
}
/**
* Given a token, determines the minimum and maximum number of function
* parameters to read, along with the mask that should be used to read
* those function parameters. If the token isn't a transform function,
* returns an error.
*
* @param aToken The token identifying the function.
* @param aMinElems [out] The minimum number of elements to read.
* @param aMaxElems [out] The maximum number of elements to read
* @param aVariantMask [out] The variant mask to use during parsing
* @return Whether the information was loaded successfully.
*/
static bool GetFunctionParseInformation(nsCSSKeyword aToken,
bool aIsPrefixed,
uint16_t &aMinElems,
uint16_t &aMaxElems,
const int32_t *& aVariantMask,
bool &aIs3D)
{
/* These types represent the common variant masks that will be used to
* parse out the individual functions. The order in the enumeration
* must match the order in which the masks are declared.
*/
enum { eLengthPercentCalc,
eLengthCalc,
eTwoLengthPercentCalcs,
eTwoLengthPercentCalcsOneLengthCalc,
eAngle,
eTwoAngles,
eNumber,
ePositiveLength,
eTwoNumbers,
eThreeNumbers,
eThreeNumbersOneAngle,
eMatrix,
eMatrixPrefixed,
eMatrix3d,
eMatrix3dPrefixed,
eNumVariantMasks };
static const int32_t kMaxElemsPerFunction = 16;
static const int32_t kVariantMasks[eNumVariantMasks][kMaxElemsPerFunction] = {
{VARIANT_LPCALC},
{VARIANT_LENGTH|VARIANT_CALC},
{VARIANT_LPCALC, VARIANT_LPCALC},
{VARIANT_LPCALC, VARIANT_LPCALC, VARIANT_LENGTH|VARIANT_CALC},
{VARIANT_ANGLE_OR_ZERO},
{VARIANT_ANGLE_OR_ZERO, VARIANT_ANGLE_OR_ZERO},
{VARIANT_NUMBER},
{VARIANT_LENGTH|VARIANT_POSITIVE_DIMENSION},
{VARIANT_NUMBER, VARIANT_NUMBER},
{VARIANT_NUMBER, VARIANT_NUMBER, VARIANT_NUMBER},
{VARIANT_NUMBER, VARIANT_NUMBER, VARIANT_NUMBER, VARIANT_ANGLE_OR_ZERO},
{VARIANT_NUMBER, VARIANT_NUMBER, VARIANT_NUMBER, VARIANT_NUMBER,
VARIANT_NUMBER, VARIANT_NUMBER},
{VARIANT_NUMBER, VARIANT_NUMBER, VARIANT_NUMBER, VARIANT_NUMBER,
VARIANT_LPNCALC, VARIANT_LPNCALC},
{VARIANT_NUMBER, VARIANT_NUMBER, VARIANT_NUMBER, VARIANT_NUMBER,
VARIANT_NUMBER, VARIANT_NUMBER, VARIANT_NUMBER, VARIANT_NUMBER,
VARIANT_NUMBER, VARIANT_NUMBER, VARIANT_NUMBER, VARIANT_NUMBER,
VARIANT_NUMBER, VARIANT_NUMBER, VARIANT_NUMBER, VARIANT_NUMBER},
{VARIANT_NUMBER, VARIANT_NUMBER, VARIANT_NUMBER, VARIANT_NUMBER,
VARIANT_NUMBER, VARIANT_NUMBER, VARIANT_NUMBER, VARIANT_NUMBER,
VARIANT_NUMBER, VARIANT_NUMBER, VARIANT_NUMBER, VARIANT_NUMBER,
VARIANT_LPNCALC, VARIANT_LPNCALC, VARIANT_LNCALC, VARIANT_NUMBER}};
#ifdef DEBUG
static const uint8_t kVariantMaskLengths[eNumVariantMasks] =
{1, 1, 2, 3, 1, 2, 1, 1, 2, 3, 4, 6, 6, 16, 16};
#endif
int32_t variantIndex = eNumVariantMasks;
aIs3D = false;
switch (aToken) {
case eCSSKeyword_translatex:
case eCSSKeyword_translatey:
/* Exactly one length or percent. */
variantIndex = eLengthPercentCalc;
aMinElems = 1U;
aMaxElems = 1U;
break;
case eCSSKeyword_translatez:
/* Exactly one length */
variantIndex = eLengthCalc;
aMinElems = 1U;
aMaxElems = 1U;
aIs3D = true;
break;
case eCSSKeyword_translate3d:
/* Exactly two lengthds or percents and a number */
variantIndex = eTwoLengthPercentCalcsOneLengthCalc;
aMinElems = 3U;
aMaxElems = 3U;
aIs3D = true;
break;
case eCSSKeyword_scalez:
aIs3D = true;
case eCSSKeyword_scalex:
case eCSSKeyword_scaley:
/* Exactly one scale factor. */
variantIndex = eNumber;
aMinElems = 1U;
aMaxElems = 1U;
break;
case eCSSKeyword_scale3d:
/* Exactly three scale factors. */
variantIndex = eThreeNumbers;
aMinElems = 3U;
aMaxElems = 3U;
aIs3D = true;
break;
case eCSSKeyword_rotatex:
case eCSSKeyword_rotatey:
aIs3D = true;
case eCSSKeyword_rotate:
case eCSSKeyword_rotatez:
/* Exactly one angle. */
variantIndex = eAngle;
aMinElems = 1U;
aMaxElems = 1U;
break;
case eCSSKeyword_rotate3d:
variantIndex = eThreeNumbersOneAngle;
aMinElems = 4U;
aMaxElems = 4U;
aIs3D = true;
break;
case eCSSKeyword_translate:
/* One or two lengths or percents. */
variantIndex = eTwoLengthPercentCalcs;
aMinElems = 1U;
aMaxElems = 2U;
break;
case eCSSKeyword_skew:
/* Exactly one or two angles. */
variantIndex = eTwoAngles;
aMinElems = 1U;
aMaxElems = 2U;
break;
case eCSSKeyword_scale:
/* One or two scale factors. */
variantIndex = eTwoNumbers;
aMinElems = 1U;
aMaxElems = 2U;
break;
case eCSSKeyword_skewx:
/* Exactly one angle. */
variantIndex = eAngle;
aMinElems = 1U;
aMaxElems = 1U;
break;
case eCSSKeyword_skewy:
/* Exactly one angle. */
variantIndex = eAngle;
aMinElems = 1U;
aMaxElems = 1U;
break;
case eCSSKeyword_matrix:
/* Six values, all numbers. */
variantIndex = aIsPrefixed ? eMatrixPrefixed : eMatrix;
aMinElems = 6U;
aMaxElems = 6U;
break;
case eCSSKeyword_matrix3d:
/* 16 matrix values, all numbers */
variantIndex = aIsPrefixed ? eMatrix3dPrefixed : eMatrix3d;
aMinElems = 16U;
aMaxElems = 16U;
aIs3D = true;
break;
case eCSSKeyword_perspective:
/* Exactly one scale number. */
variantIndex = ePositiveLength;
aMinElems = 1U;
aMaxElems = 1U;
aIs3D = true;
break;
default:
/* Oh dear, we didn't match. Report an error. */
return false;
}
NS_ASSERTION(aMinElems > 0, "Didn't update minimum elements!");
NS_ASSERTION(aMaxElems > 0, "Didn't update maximum elements!");
NS_ASSERTION(aMinElems <= aMaxElems, "aMinElems > aMaxElems!");
NS_ASSERTION(variantIndex >= 0, "Invalid variant mask!");
NS_ASSERTION(variantIndex < eNumVariantMasks, "Invalid variant mask!");
#ifdef DEBUG
NS_ASSERTION(aMaxElems <= kVariantMaskLengths[variantIndex],
"Invalid aMaxElems for this variant mask.");
#endif
// Convert the index into a mask.
aVariantMask = kVariantMasks[variantIndex];
return true;
}
/* Reads a single transform function from the tokenizer stream, reporting an
* error if something goes wrong.
*/
bool
CSSParserImpl::ParseSingleTransform(bool aIsPrefixed,
nsCSSValue& aValue, bool& aIs3D)
{
if (!GetToken(true))
return false;
if (mToken.mType != eCSSToken_Function) {
UngetToken();
return false;
}
const int32_t* variantMask;
uint16_t minElems, maxElems;
nsCSSKeyword keyword = nsCSSKeywords::LookupKeyword(mToken.mIdent);
if (!GetFunctionParseInformation(keyword, aIsPrefixed,
minElems, maxElems, variantMask, aIs3D))
return false;
return ParseFunction(keyword, variantMask, 0, minElems, maxElems, aValue);
}
/* Parses a transform property list by continuously reading in properties
* and constructing a matrix from it.
*/
bool CSSParserImpl::ParseTransform(bool aIsPrefixed)
{
nsCSSValue value;
if (ParseVariant(value, VARIANT_INHERIT | VARIANT_NONE, nullptr)) {
// 'inherit', 'initial', and 'none' must be alone
if (!ExpectEndProperty()) {
return false;
}
} else {
nsCSSValueList* cur = value.SetListValue();
for (;;) {
bool is3D;
if (!ParseSingleTransform(aIsPrefixed, cur->mValue, is3D)) {
return false;
}
if (is3D && !nsLayoutUtils::Are3DTransformsEnabled()) {
return false;
}
if (CheckEndProperty()) {
break;
}
cur->mNext = new nsCSSValueList;
cur = cur->mNext;
}
}
AppendValue(eCSSProperty_transform, value);
return true;
}
bool CSSParserImpl::ParseTransformOrigin(bool aPerspective)
{
nsCSSValuePair position;
if (!ParseBoxPositionValues(position, true))
return false;
nsCSSProperty prop = eCSSProperty_transform_origin;
if (aPerspective) {
if (!ExpectEndProperty()) {
return false;
}
prop = eCSSProperty_perspective_origin;
}
// Unlike many other uses of pairs, this position should always be stored
// as a pair, even if the values are the same, so it always serializes as
// a pair, and to keep the computation code simple.
if (position.mXValue.GetUnit() == eCSSUnit_Inherit ||
position.mXValue.GetUnit() == eCSSUnit_Initial) {
NS_ABORT_IF_FALSE(position.mXValue == position.mYValue,
"inherit/initial only half?");
AppendValue(prop, position.mXValue);
} else {
nsCSSValue value;
if (aPerspective) {
value.SetPairValue(position.mXValue, position.mYValue);
} else {
nsCSSValue depth;
if (!nsLayoutUtils::Are3DTransformsEnabled() ||
// only try parsing if 3-D transforms are enabled
!ParseVariant(depth, VARIANT_LENGTH | VARIANT_CALC, nullptr)) {
depth.SetFloatValue(0.0f, eCSSUnit_Pixel);
}
value.SetTripletValue(position.mXValue, position.mYValue, depth);
}
AppendValue(prop, value);
}
return true;
}
bool
CSSParserImpl::ParseTransitionProperty()
{
nsCSSValue value;
if (ParseVariant(value, VARIANT_INHERIT | VARIANT_NONE, nullptr)) {
// 'inherit', 'initial', and 'none' must be alone
if (!ExpectEndProperty()) {
return false;
}
} else {
// Accept a list of arbitrary identifiers. They should be
// CSS properties, but we want to accept any so that we
// accept properties that we don't know about yet, e.g.
// transition-property: invalid-property, left, opacity;
nsCSSValueList* cur = value.SetListValue();
for (;;) {
if (!ParseVariant(cur->mValue, VARIANT_IDENTIFIER | VARIANT_ALL, nullptr)) {
return false;
}
if (cur->mValue.GetUnit() == eCSSUnit_Ident) {
nsDependentString str(cur->mValue.GetStringBufferValue());
// Exclude 'none' and 'inherit' and 'initial' according to the
// same rules as for 'counter-reset' in CSS 2.1.
if (str.LowerCaseEqualsLiteral("none") ||
str.LowerCaseEqualsLiteral("inherit") ||
str.LowerCaseEqualsLiteral("initial")) {
return false;
}
}
if (CheckEndProperty()) {
break;
}
if (!ExpectSymbol(',', true)) {
REPORT_UNEXPECTED_TOKEN(PEExpectedComma);
return false;
}
cur->mNext = new nsCSSValueList;
cur = cur->mNext;
}
}
AppendValue(eCSSProperty_transition_property, value);
return true;
}
bool
CSSParserImpl::ParseTransitionTimingFunctionValues(nsCSSValue& aValue)
{
NS_ASSERTION(!mHavePushBack &&
mToken.mType == eCSSToken_Function &&
mToken.mIdent.LowerCaseEqualsLiteral("cubic-bezier"),
"unexpected initial state");
nsRefPtr<nsCSSValue::Array> val = nsCSSValue::Array::Create(4);
float x1, x2, y1, y2;
if (!ParseTransitionTimingFunctionValueComponent(x1, ',', true) ||
!ParseTransitionTimingFunctionValueComponent(y1, ',', false) ||
!ParseTransitionTimingFunctionValueComponent(x2, ',', true) ||
!ParseTransitionTimingFunctionValueComponent(y2, ')', false)) {
return false;
}
val->Item(0).SetFloatValue(x1, eCSSUnit_Number);
val->Item(1).SetFloatValue(y1, eCSSUnit_Number);
val->Item(2).SetFloatValue(x2, eCSSUnit_Number);
val->Item(3).SetFloatValue(y2, eCSSUnit_Number);
aValue.SetArrayValue(val, eCSSUnit_Cubic_Bezier);
return true;
}
bool
CSSParserImpl::ParseTransitionTimingFunctionValueComponent(float& aComponent,
char aStop,
bool aCheckRange)
{
if (!GetToken(true)) {
return false;
}
nsCSSToken* tk = &mToken;
if (tk->mType == eCSSToken_Number) {
float num = tk->mNumber;
if (aCheckRange && (num < 0.0 || num > 1.0)) {
return false;
}
aComponent = num;
if (ExpectSymbol(aStop, true)) {
return true;
}
}
return false;
}
bool
CSSParserImpl::ParseTransitionStepTimingFunctionValues(nsCSSValue& aValue)
{
NS_ASSERTION(!mHavePushBack &&
mToken.mType == eCSSToken_Function &&
mToken.mIdent.LowerCaseEqualsLiteral("steps"),
"unexpected initial state");
nsRefPtr<nsCSSValue::Array> val = nsCSSValue::Array::Create(2);
if (!ParseOneOrLargerVariant(val->Item(0), VARIANT_INTEGER, nullptr)) {
return false;
}
int32_t type = NS_STYLE_TRANSITION_TIMING_FUNCTION_STEP_END;
if (ExpectSymbol(',', true)) {
if (!GetToken(true)) {
return false;
}
type = -1;
if (mToken.mType == eCSSToken_Ident) {
if (mToken.mIdent.LowerCaseEqualsLiteral("start")) {
type = NS_STYLE_TRANSITION_TIMING_FUNCTION_STEP_START;
} else if (mToken.mIdent.LowerCaseEqualsLiteral("end")) {
type = NS_STYLE_TRANSITION_TIMING_FUNCTION_STEP_END;
}
}
if (type == -1) {
UngetToken();
return false;
}
}
val->Item(1).SetIntValue(type, eCSSUnit_Enumerated);
if (!ExpectSymbol(')', true)) {
return false;
}
aValue.SetArrayValue(val, eCSSUnit_Steps);
return true;
}
static nsCSSValueList*
AppendValueToList(nsCSSValue& aContainer,
nsCSSValueList* aTail,
const nsCSSValue& aValue)
{
nsCSSValueList* entry;
if (aContainer.GetUnit() == eCSSUnit_Null) {
NS_ABORT_IF_FALSE(!aTail, "should not have an entry");
entry = aContainer.SetListValue();
} else {
NS_ABORT_IF_FALSE(!aTail->mNext, "should not have a next entry");
NS_ABORT_IF_FALSE(aContainer.GetUnit() == eCSSUnit_List, "not a list");
entry = new nsCSSValueList;
aTail->mNext = entry;
}
entry->mValue = aValue;
return entry;
}
CSSParserImpl::ParseAnimationOrTransitionShorthandResult
CSSParserImpl::ParseAnimationOrTransitionShorthand(
const nsCSSProperty* aProperties,
const nsCSSValue* aInitialValues,
nsCSSValue* aValues,
size_t aNumProperties)
{
nsCSSValue tempValue;
// first see if 'inherit' or 'initial' is specified. If one is,
// it can be the only thing specified, so don't attempt to parse any
// additional properties
if (ParseVariant(tempValue, VARIANT_INHERIT, nullptr)) {
for (uint32_t i = 0; i < aNumProperties; ++i) {
AppendValue(aProperties[i], tempValue);
}
return eParseAnimationOrTransitionShorthand_Inherit;
}
static const size_t maxNumProperties = 7;
NS_ABORT_IF_FALSE(aNumProperties <= maxNumProperties,
"can't handle this many properties");
nsCSSValueList *cur[maxNumProperties];
bool parsedProperty[maxNumProperties];
for (size_t i = 0; i < aNumProperties; ++i) {
cur[i] = nullptr;
}
bool atEOP = false; // at end of property?
for (;;) { // loop over comma-separated transitions or animations
// whether a particular subproperty was specified for this
// transition or animation
for (size_t i = 0; i < aNumProperties; ++i) {
parsedProperty[i] = false;
}
for (;;) { // loop over values within a transition or animation
bool foundProperty = false;
// check to see if we're at the end of one full transition or
// animation definition (either because we hit a comma or because
// we hit the end of the property definition)
if (ExpectSymbol(',', true))
break;
if (CheckEndProperty()) {
atEOP = true;
break;
}
// else, try to parse the next transition or animation sub-property
for (uint32_t i = 0; !foundProperty && i < aNumProperties; ++i) {
if (!parsedProperty[i]) {
// if we haven't found this property yet, try to parse it
if (ParseSingleValueProperty(tempValue, aProperties[i])) {
parsedProperty[i] = true;
cur[i] = AppendValueToList(aValues[i], cur[i], tempValue);
foundProperty = true;
break; // out of inner loop; continue looking for next sub-property
}
}
}
if (!foundProperty) {
// We're not at a ',' or at the end of the property, but we couldn't
// parse any of the sub-properties, so the declaration is invalid.
return eParseAnimationOrTransitionShorthand_Error;
}
}
// We hit the end of the property or the end of one transition
// or animation definition, add its components to the list.
for (uint32_t i = 0; i < aNumProperties; ++i) {
// If all of the subproperties were not explicitly specified, fill
// in the missing ones with initial values.
if (!parsedProperty[i]) {
cur[i] = AppendValueToList(aValues[i], cur[i], aInitialValues[i]);
}
}
if (atEOP)
break;
// else we just hit a ',' so continue parsing the next compound transition
}
return eParseAnimationOrTransitionShorthand_Values;
}
bool
CSSParserImpl::ParseTransition()
{
static const nsCSSProperty kTransitionProperties[] = {
eCSSProperty_transition_duration,
eCSSProperty_transition_timing_function,
// Must check 'transition-delay' after 'transition-duration', since
// that's our assumption about what the spec means for the shorthand
// syntax (the first time given is the duration, and the second
// given is the delay).
eCSSProperty_transition_delay,
// Must check 'transition-property' after
// 'transition-timing-function' since 'transition-property' accepts
// any keyword.
eCSSProperty_transition_property
};
static const uint32_t numProps = NS_ARRAY_LENGTH(kTransitionProperties);
// this is a shorthand property that accepts -property, -delay,
// -duration, and -timing-function with some components missing.
// there can be multiple transitions, separated with commas
nsCSSValue initialValues[numProps];
initialValues[0].SetFloatValue(0.0, eCSSUnit_Seconds);
initialValues[1].SetIntValue(NS_STYLE_TRANSITION_TIMING_FUNCTION_EASE,
eCSSUnit_Enumerated);
initialValues[2].SetFloatValue(0.0, eCSSUnit_Seconds);
initialValues[3].SetAllValue();
nsCSSValue values[numProps];
ParseAnimationOrTransitionShorthandResult spres =
ParseAnimationOrTransitionShorthand(kTransitionProperties,
initialValues, values, numProps);
if (spres != eParseAnimationOrTransitionShorthand_Values) {
return spres != eParseAnimationOrTransitionShorthand_Error;
}
// Make two checks on the list for 'transition-property':
// + If there is more than one item, then none of the items can be
// 'none' or 'all'.
// + None of the items can be 'inherit' or 'initial' (this is the case,
// like with counter-reset &c., where CSS 2.1 specifies 'initial', so
// we should check it without the -moz- prefix).
{
NS_ABORT_IF_FALSE(kTransitionProperties[3] ==
eCSSProperty_transition_property,
"array index mismatch");
nsCSSValueList *l = values[3].GetListValue();
bool multipleItems = !!l->mNext;
do {
const nsCSSValue& val = l->mValue;
if (val.GetUnit() == eCSSUnit_None) {
if (multipleItems) {
// This is a syntax error.
return false;
}
// Unbox a solitary 'none'.
values[3].SetNoneValue();
break;
}
if (val.GetUnit() == eCSSUnit_Ident) {
nsDependentString str(val.GetStringBufferValue());
if (str.EqualsLiteral("inherit") || str.EqualsLiteral("initial")) {
return false;
}
}
} while ((l = l->mNext));
}
// Save all parsed transition sub-properties in mTempData
for (uint32_t i = 0; i < numProps; ++i) {
AppendValue(kTransitionProperties[i], values[i]);
}
return true;
}
bool
CSSParserImpl::ParseAnimation()
{
static const nsCSSProperty kAnimationProperties[] = {
eCSSProperty_animation_duration,
eCSSProperty_animation_timing_function,
// Must check 'animation-delay' after 'animation-duration', since
// that's our assumption about what the spec means for the shorthand
// syntax (the first time given is the duration, and the second
// given is the delay).
eCSSProperty_animation_delay,
eCSSProperty_animation_direction,
eCSSProperty_animation_fill_mode,
eCSSProperty_animation_iteration_count,
// Must check 'animation-name' after 'animation-timing-function',
// 'animation-direction', 'animation-fill-mode',
// 'animation-iteration-count', and 'animation-play-state' since
// 'animation-name' accepts any keyword.
eCSSProperty_animation_name
};
static const uint32_t numProps = NS_ARRAY_LENGTH(kAnimationProperties);
// this is a shorthand property that accepts -property, -delay,
// -duration, and -timing-function with some components missing.
// there can be multiple animations, separated with commas
nsCSSValue initialValues[numProps];
initialValues[0].SetFloatValue(0.0, eCSSUnit_Seconds);
initialValues[1].SetIntValue(NS_STYLE_TRANSITION_TIMING_FUNCTION_EASE,
eCSSUnit_Enumerated);
initialValues[2].SetFloatValue(0.0, eCSSUnit_Seconds);
initialValues[3].SetIntValue(NS_STYLE_ANIMATION_DIRECTION_NORMAL, eCSSUnit_Enumerated);
initialValues[4].SetIntValue(NS_STYLE_ANIMATION_FILL_MODE_NONE, eCSSUnit_Enumerated);
initialValues[5].SetFloatValue(1.0f, eCSSUnit_Number);
initialValues[6].SetNoneValue();
nsCSSValue values[numProps];
ParseAnimationOrTransitionShorthandResult spres =
ParseAnimationOrTransitionShorthand(kAnimationProperties,
initialValues, values, numProps);
if (spres != eParseAnimationOrTransitionShorthand_Values) {
return spres != eParseAnimationOrTransitionShorthand_Error;
}
// Save all parsed animation sub-properties in mTempData
for (uint32_t i = 0; i < numProps; ++i) {
AppendValue(kAnimationProperties[i], values[i]);
}
return true;
}
bool
CSSParserImpl::ParseShadowItem(nsCSSValue& aValue, bool aIsBoxShadow)
{
// A shadow list item is an array, with entries in this sequence:
enum {
IndexX,
IndexY,
IndexRadius,
IndexSpread, // only for box-shadow
IndexColor,
IndexInset // only for box-shadow
};
nsRefPtr<nsCSSValue::Array> val = nsCSSValue::Array::Create(6);
if (aIsBoxShadow) {
// Optional inset keyword (ignore errors)
ParseVariant(val->Item(IndexInset), VARIANT_KEYWORD,
nsCSSProps::kBoxShadowTypeKTable);
}
nsCSSValue xOrColor;
bool haveColor = false;
if (!ParseVariant(xOrColor, VARIANT_COLOR | VARIANT_LENGTH | VARIANT_CALC,
nullptr)) {
return false;
}
if (xOrColor.IsLengthUnit() || xOrColor.IsCalcUnit()) {
val->Item(IndexX) = xOrColor;
} else {
// Must be a color (as string or color value)
NS_ASSERTION(xOrColor.GetUnit() == eCSSUnit_Ident ||
xOrColor.GetUnit() == eCSSUnit_Color ||
xOrColor.GetUnit() == eCSSUnit_EnumColor,
"Must be a color value");
val->Item(IndexColor) = xOrColor;
haveColor = true;
// X coordinate mandatory after color
if (!ParseVariant(val->Item(IndexX), VARIANT_LENGTH | VARIANT_CALC,
nullptr)) {
return false;
}
}
// Y coordinate; mandatory
if (!ParseVariant(val->Item(IndexY), VARIANT_LENGTH | VARIANT_CALC,
nullptr)) {
return false;
}
// Optional radius. Ignore errors except if they pass a negative
// value which we must reject. If we use ParseNonNegativeVariant
// we can't tell the difference between an unspecified radius
// and a negative radius.
if (ParseVariant(val->Item(IndexRadius), VARIANT_LENGTH | VARIANT_CALC,
nullptr) &&
val->Item(IndexRadius).IsLengthUnit() &&
val->Item(IndexRadius).GetFloatValue() < 0) {
return false;
}
if (aIsBoxShadow) {
// Optional spread
ParseVariant(val->Item(IndexSpread), VARIANT_LENGTH | VARIANT_CALC, nullptr);
}
if (!haveColor) {
// Optional color
ParseVariant(val->Item(IndexColor), VARIANT_COLOR, nullptr);
}
if (aIsBoxShadow && val->Item(IndexInset).GetUnit() == eCSSUnit_Null) {
// Optional inset keyword
ParseVariant(val->Item(IndexInset), VARIANT_KEYWORD,
nsCSSProps::kBoxShadowTypeKTable);
}
aValue.SetArrayValue(val, eCSSUnit_Array);
return true;
}
bool
CSSParserImpl::ParseShadowList(nsCSSProperty aProperty)
{
nsAutoParseCompoundProperty compound(this);
bool isBoxShadow = aProperty == eCSSProperty_box_shadow;
nsCSSValue value;
if (ParseVariant(value, VARIANT_INHERIT | VARIANT_NONE, nullptr)) {
// 'inherit', 'initial', and 'none' must be alone
if (!ExpectEndProperty()) {
return false;
}
} else {
nsCSSValueList* cur = value.SetListValue();
for (;;) {
if (!ParseShadowItem(cur->mValue, isBoxShadow)) {
return false;
}
if (CheckEndProperty()) {
break;
}
if (!ExpectSymbol(',', true)) {
return false;
}
cur->mNext = new nsCSSValueList;
cur = cur->mNext;
}
}
AppendValue(aProperty, value);
return true;
}
int32_t
CSSParserImpl::GetNamespaceIdForPrefix(const nsString& aPrefix)
{
NS_PRECONDITION(!aPrefix.IsEmpty(), "Must have a prefix here");
int32_t nameSpaceID = kNameSpaceID_Unknown;
if (mNameSpaceMap) {
// user-specified identifiers are case-sensitive (bug 416106)
nsCOMPtr<nsIAtom> prefix = do_GetAtom(aPrefix);
if (!prefix) {
NS_RUNTIMEABORT("do_GetAtom failed - out of memory?");
}
nameSpaceID = mNameSpaceMap->FindNameSpaceID(prefix);
}
// else no declared namespaces
if (nameSpaceID == kNameSpaceID_Unknown) { // unknown prefix, dump it
REPORT_UNEXPECTED_P(PEUnknownNamespacePrefix, aPrefix);
}
return nameSpaceID;
}
void
CSSParserImpl::SetDefaultNamespaceOnSelector(nsCSSSelector& aSelector)
{
if (mNameSpaceMap) {
aSelector.SetNameSpace(mNameSpaceMap->FindNameSpaceID(nullptr));
} else {
aSelector.SetNameSpace(kNameSpaceID_Unknown); // wildcard
}
}
bool
CSSParserImpl::ParsePaint(nsCSSProperty aPropID)
{
nsCSSValue x, y;
if (!ParseVariant(x, VARIANT_HCK | VARIANT_NONE | VARIANT_URL,
nsCSSProps::kObjectPatternKTable)) {
return false;
}
bool canHaveFallback = x.GetUnit() == eCSSUnit_URL ||
x.GetUnit() == eCSSUnit_Enumerated;
if (canHaveFallback) {
if (!ParseVariant(y, VARIANT_COLOR | VARIANT_NONE, nullptr))
y.SetNoneValue();
}
if (!ExpectEndProperty())
return false;
if (!canHaveFallback) {
AppendValue(aPropID, x);
} else {
nsCSSValue val;
val.SetPairValue(x, y);
AppendValue(aPropID, val);
}
return true;
}
bool
CSSParserImpl::ParseDasharray()
{
nsCSSValue value;
if (ParseVariant(value, VARIANT_HK | VARIANT_NONE,
nsCSSProps::kStrokeObjectValueKTable)) {
// 'inherit', 'initial', and 'none' are only allowed on their own
if (!ExpectEndProperty()) {
return false;
}
} else {
nsCSSValueList *cur = value.SetListValue();
for (;;) {
if (!ParseNonNegativeVariant(cur->mValue, VARIANT_LPN, nullptr)) {
return false;
}
if (CheckEndProperty()) {
break;
}
// skip optional commas between elements
(void)ExpectSymbol(',', true);
cur->mNext = new nsCSSValueList;
cur = cur->mNext;
}
}
AppendValue(eCSSProperty_stroke_dasharray, value);
return true;
}
bool
CSSParserImpl::ParseMarker()
{
nsCSSValue marker;
if (ParseSingleValueProperty(marker, eCSSProperty_marker_end)) {
if (ExpectEndProperty()) {
AppendValue(eCSSProperty_marker_end, marker);
AppendValue(eCSSProperty_marker_mid, marker);
AppendValue(eCSSProperty_marker_start, marker);
return true;
}
}
return false;
}
bool
CSSParserImpl::ParsePaintOrder()
{
MOZ_STATIC_ASSERT
((1 << NS_STYLE_PAINT_ORDER_BITWIDTH) > NS_STYLE_PAINT_ORDER_LAST_VALUE,
"bitfield width insufficient for paint-order constants");
static const int32_t kPaintOrderKTable[] = {
eCSSKeyword_normal, NS_STYLE_PAINT_ORDER_NORMAL,
eCSSKeyword_fill, NS_STYLE_PAINT_ORDER_FILL,
eCSSKeyword_stroke, NS_STYLE_PAINT_ORDER_STROKE,
eCSSKeyword_markers, NS_STYLE_PAINT_ORDER_MARKERS,
eCSSKeyword_UNKNOWN,-1
};
MOZ_STATIC_ASSERT(NS_ARRAY_LENGTH(kPaintOrderKTable) ==
2 * (NS_STYLE_PAINT_ORDER_LAST_VALUE + 2),
"missing paint-order values in kPaintOrderKTable");
nsCSSValue value;
if (!ParseVariant(value, VARIANT_HK, kPaintOrderKTable)) {
return false;
}
uint32_t seen = 0;
uint32_t order = 0;
uint32_t position = 0;
// Ensure that even cast to a signed int32_t when stored in CSSValue,
// we have enough space for the entire paint-order value.
MOZ_STATIC_ASSERT
(NS_STYLE_PAINT_ORDER_BITWIDTH * NS_STYLE_PAINT_ORDER_LAST_VALUE < 32,
"seen and order not big enough");
if (value.GetUnit() == eCSSUnit_Enumerated) {
uint32_t component = static_cast<uint32_t>(value.GetIntValue());
if (component != NS_STYLE_PAINT_ORDER_NORMAL) {
bool parsedOK = true;
for (;;) {
if (seen & (1 << component)) {
// Already seen this component.
UngetToken();
parsedOK = false;
break;
}
seen |= (1 << component);
order |= (component << position);
position += NS_STYLE_PAINT_ORDER_BITWIDTH;
if (!ParseEnum(value, kPaintOrderKTable)) {
break;
}
component = value.GetIntValue();
if (component == NS_STYLE_PAINT_ORDER_NORMAL) {
// Can't have "normal" in the middle of the list of paint components.
UngetToken();
parsedOK = false;
break;
}
}
// Fill in the remaining paint-order components in the order of their
// constant values.
if (parsedOK) {
for (component = 1;
component <= NS_STYLE_PAINT_ORDER_LAST_VALUE;
component++) {
if (!(seen & (1 << component))) {
order |= (component << position);
position += NS_STYLE_PAINT_ORDER_BITWIDTH;
}
}
}
}
MOZ_STATIC_ASSERT(NS_STYLE_PAINT_ORDER_NORMAL == 0,
"unexpected value for NS_STYLE_PAINT_ORDER_NORMAL");
value.SetIntValue(static_cast<int32_t>(order), eCSSUnit_Enumerated);
}
if (!ExpectEndProperty()) {
return false;
}
AppendValue(eCSSProperty_paint_order, value);
return true;
}
} // anonymous namespace
// Recycling of parser implementation objects
static CSSParserImpl* gFreeList = nullptr;
nsCSSParser::nsCSSParser(mozilla::css::Loader* aLoader,
nsCSSStyleSheet* aSheet)
{
CSSParserImpl *impl = gFreeList;
if (impl) {
gFreeList = impl->mNextFree;
impl->mNextFree = nullptr;
} else {
impl = new CSSParserImpl();
}
if (aLoader) {
impl->SetChildLoader(aLoader);
impl->SetQuirkMode(aLoader->GetCompatibilityMode() ==
eCompatibility_NavQuirks);
}
if (aSheet) {
impl->SetStyleSheet(aSheet);
}
mImpl = static_cast<void*>(impl);
}
nsCSSParser::~nsCSSParser()
{
CSSParserImpl *impl = static_cast<CSSParserImpl*>(mImpl);
impl->Reset();
impl->mNextFree = gFreeList;
gFreeList = impl;
}
/* static */ void
nsCSSParser::Shutdown()
{
CSSParserImpl *tofree = gFreeList;
CSSParserImpl *next;
while (tofree)
{
next = tofree->mNextFree;
delete tofree;
tofree = next;
}
}
// Wrapper methods
nsresult
nsCSSParser::SetStyleSheet(nsCSSStyleSheet* aSheet)
{
return static_cast<CSSParserImpl*>(mImpl)->
SetStyleSheet(aSheet);
}
nsresult
nsCSSParser::SetQuirkMode(bool aQuirkMode)
{
return static_cast<CSSParserImpl*>(mImpl)->
SetQuirkMode(aQuirkMode);
}
nsresult
nsCSSParser::SetChildLoader(mozilla::css::Loader* aChildLoader)
{
return static_cast<CSSParserImpl*>(mImpl)->
SetChildLoader(aChildLoader);
}
nsresult
nsCSSParser::ParseSheet(const nsAString& aInput,
nsIURI* aSheetURI,
nsIURI* aBaseURI,
nsIPrincipal* aSheetPrincipal,
uint32_t aLineNumber,
bool aAllowUnsafeRules)
{
return static_cast<CSSParserImpl*>(mImpl)->
ParseSheet(aInput, aSheetURI, aBaseURI, aSheetPrincipal, aLineNumber,
aAllowUnsafeRules);
}
nsresult
nsCSSParser::ParseStyleAttribute(const nsAString& aAttributeValue,
nsIURI* aDocURI,
nsIURI* aBaseURI,
nsIPrincipal* aNodePrincipal,
css::StyleRule** aResult)
{
return static_cast<CSSParserImpl*>(mImpl)->
ParseStyleAttribute(aAttributeValue, aDocURI, aBaseURI,
aNodePrincipal, aResult);
}
nsresult
nsCSSParser::ParseDeclarations(const nsAString& aBuffer,
nsIURI* aSheetURI,
nsIURI* aBaseURI,
nsIPrincipal* aSheetPrincipal,
css::Declaration* aDeclaration,
bool* aChanged)
{
return static_cast<CSSParserImpl*>(mImpl)->
ParseDeclarations(aBuffer, aSheetURI, aBaseURI, aSheetPrincipal,
aDeclaration, aChanged);
}
nsresult
nsCSSParser::ParseRule(const nsAString& aRule,
nsIURI* aSheetURI,
nsIURI* aBaseURI,
nsIPrincipal* aSheetPrincipal,
css::Rule** aResult)
{
return static_cast<CSSParserImpl*>(mImpl)->
ParseRule(aRule, aSheetURI, aBaseURI, aSheetPrincipal, aResult);
}
nsresult
nsCSSParser::ParseProperty(const nsCSSProperty aPropID,
const nsAString& aPropValue,
nsIURI* aSheetURI,
nsIURI* aBaseURI,
nsIPrincipal* aSheetPrincipal,
css::Declaration* aDeclaration,
bool* aChanged,
bool aIsImportant,
bool aIsSVGMode)
{
return static_cast<CSSParserImpl*>(mImpl)->
ParseProperty(aPropID, aPropValue, aSheetURI, aBaseURI,
aSheetPrincipal, aDeclaration, aChanged,
aIsImportant, aIsSVGMode);
}
nsresult
nsCSSParser::ParseMediaList(const nsSubstring& aBuffer,
nsIURI* aURI,
uint32_t aLineNumber,
nsMediaList* aMediaList,
bool aHTMLMode)
{
return static_cast<CSSParserImpl*>(mImpl)->
ParseMediaList(aBuffer, aURI, aLineNumber, aMediaList, aHTMLMode);
}
bool
nsCSSParser::ParseColorString(const nsSubstring& aBuffer,
nsIURI* aURI,
uint32_t aLineNumber,
nsCSSValue& aValue)
{
return static_cast<CSSParserImpl*>(mImpl)->
ParseColorString(aBuffer, aURI, aLineNumber, aValue);
}
nsresult
nsCSSParser::ParseSelectorString(const nsSubstring& aSelectorString,
nsIURI* aURI,
uint32_t aLineNumber,
nsCSSSelectorList** aSelectorList)
{
return static_cast<CSSParserImpl*>(mImpl)->
ParseSelectorString(aSelectorString, aURI, aLineNumber, aSelectorList);
}
already_AddRefed<nsCSSKeyframeRule>
nsCSSParser::ParseKeyframeRule(const nsSubstring& aBuffer,
nsIURI* aURI,
uint32_t aLineNumber)
{
return static_cast<CSSParserImpl*>(mImpl)->
ParseKeyframeRule(aBuffer, aURI, aLineNumber);
}
bool
nsCSSParser::ParseKeyframeSelectorString(const nsSubstring& aSelectorString,
nsIURI* aURI,
uint32_t aLineNumber,
InfallibleTArray<float>& aSelectorList)
{
return static_cast<CSSParserImpl*>(mImpl)->
ParseKeyframeSelectorString(aSelectorString, aURI, aLineNumber,
aSelectorList);
}
bool
nsCSSParser::EvaluateSupportsDeclaration(const nsAString& aProperty,
const nsAString& aValue,
nsIURI* aDocURL,
nsIURI* aBaseURL,
nsIPrincipal* aDocPrincipal)
{
return static_cast<CSSParserImpl*>(mImpl)->
EvaluateSupportsDeclaration(aProperty, aValue, aDocURL, aBaseURL,
aDocPrincipal);
}
bool
nsCSSParser::EvaluateSupportsCondition(const nsAString& aCondition,
nsIURI* aDocURL,
nsIURI* aBaseURL,
nsIPrincipal* aDocPrincipal)
{
return static_cast<CSSParserImpl*>(mImpl)->
EvaluateSupportsCondition(aCondition, aDocURL, aBaseURL, aDocPrincipal);
}
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