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nsCSSParser.cpp
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nsCSSParser.cpp
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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 "nsCSSParser.h"
#include "nsCSSProps.h"
#include "nsCSSKeywords.h"
#include "nsCSSScanner.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 "nsIURL.h"
#include "nsNetUtil.h"
#include "nsCOMPtr.h"
#include "nsString.h"
#include "nsReadableUtils.h"
#include "nsUnicharUtils.h"
#include "nsIAtom.h"
#include "nsCOMArray.h"
#include "nsColor.h"
#include "nsCSSPseudoClasses.h"
#include "nsCSSPseudoElements.h"
#include "nsCSSAnonBoxes.h"
#include "nsINameSpaceManager.h"
#include "nsXMLNameSpaceMap.h"
#include "nsThemeConstants.h"
#include "nsContentErrors.h"
#include "nsIMediaList.h"
#include "mozilla/LookAndFeel.h"
#include "nsStyleUtil.h"
#include "nsIPrincipal.h"
#include "prprf.h"
#include "math.h"
#include "nsContentUtils.h"
#include "nsDOMError.h"
#include "nsAutoPtr.h"
#include "prlog.h"
#include "CSSCalc.h"
#include "nsMediaFeatures.h"
#include "nsLayoutUtils.h"
#include "mozilla/Util.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_LENGTH 0x10000000 // Only lengths greater than 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 PRUint32
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 AppendRuleToArray(css::Rule* aRule, void* aArray);
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 SetSVGMode(bool aSVGMode);
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,
PRUint32 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,
nsCOMArray<css::Rule>& aResult);
nsresult ParseProperty(const nsCSSProperty aPropID,
const nsAString& aPropValue,
nsIURI* aSheetURL,
nsIURI* aBaseURL,
nsIPrincipal* aSheetPrincipal,
css::Declaration* aDeclaration,
bool* aChanged,
bool aIsImportant);
nsresult ParseMediaList(const nsSubstring& aBuffer,
nsIURI* aURL, // for error reporting
PRUint32 aLineNumber, // for error reporting
nsMediaList* aMediaList,
bool aHTMLMode);
nsresult ParseColorString(const nsSubstring& aBuffer,
nsIURI* aURL, // for error reporting
PRUint32 aLineNumber, // for error reporting
nscolor* aColor);
nsresult ParseSelectorString(const nsSubstring& aSelectorString,
nsIURI* aURL, // for error reporting
PRUint32 aLineNumber, // for error reporting
nsCSSSelectorList **aSelectorList);
already_AddRefed<nsCSSKeyframeRule>
ParseKeyframeRule(const nsSubstring& aBuffer,
nsIURI* aURL,
PRUint32 aLineNumber);
bool ParseKeyframeSelectorString(const nsSubstring& aSelectorString,
nsIURI* aURL, // for error reporting
PRUint32 aLineNumber, // for error reporting
InfallibleTArray<float>& aSelectorList);
protected:
class nsAutoParseCompoundProperty;
friend class nsAutoParseCompoundProperty;
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;
};
// the caller must hold on to aString until parsing is done
void InitScanner(const nsSubstring& aString, nsIURI* aSheetURI,
PRUint32 aLineNumber, nsIURI* aBaseURI,
nsIPrincipal* aSheetPrincipal);
void ReleaseScanner(void);
bool IsSVGMode() const {
return mScanner.IsSVGMode();
}
bool GetToken(bool aSkipWS);
void UngetToken();
// get the part in paretheses of the url() function, which is really a
// part of a token in the CSS grammar, but we're using a combination
// of the parser and the scanner to do it to handle the backtracking
// required by the error handling of the tokenization (since if we
// fail to scan the full token, we should fall back to tokenizing as
// FUNCTION ... ')').
// Note that this function WILL WRITE TO aURL IN SOME FAILURE CASES.
bool GetURLInParens(nsString& aURL);
void AssertInitialState() {
NS_PRECONDITION(!mHTMLMediaMode, "Bad initial state");
NS_PRECONDITION(!mParsingCompoundProperty, "Bad initial state");
}
bool ExpectSymbol(PRUnichar aSymbol, bool aSkipWS);
bool ExpectEndProperty();
bool CheckEndProperty();
nsSubstring* NextIdent();
void 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 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);
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(PRInt32& aDataMask,
nsCSSSelector& aSelector);
nsSelectorParsingStatus ParseClassSelector(PRInt32& 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(PRInt32& aDataMask,
nsCSSSelector& aSelector,
bool aIsNegated,
nsIAtom** aPseudoElement,
nsAtomList** aPseudoElementArgs,
nsCSSPseudoElements::Type* aPseudoElementType);
nsSelectorParsingStatus ParseAttributeSelector(PRInt32& aDataMask,
nsCSSSelector& aSelector);
nsSelectorParsingStatus ParseTypeOrUniversalSelector(PRInt32& 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(PRInt32& 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);
css::Declaration* ParseDeclarationBlock(bool aCheckForBraces);
bool ParseDeclaration(css::Declaration* aDeclaration,
bool aCheckForBraces,
bool aMustCallValueAppended,
bool* aChanged);
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[],
PRInt32 aSourceType);
bool ParseBorderStyle();
bool ParseBorderWidth();
bool ParseCalc(nsCSSValue &aValue, PRInt32 aVariantMask);
bool ParseCalcAdditiveExpression(nsCSSValue& aValue,
PRInt32& aVariantMask);
bool ParseCalcMultiplicativeExpression(nsCSSValue& aValue,
PRInt32& aVariantMask,
bool *aHadFinalWS);
bool ParseCalcTerm(nsCSSValue& aValue, PRInt32& aVariantMask);
bool RequireWhitespace();
// for 'clip' and '-moz-image-region'
bool ParseRect(nsCSSProperty aPropID);
bool ParseColumns();
bool ParseContent();
bool ParseCounterData(nsCSSProperty aPropID);
bool ParseCursor();
bool ParseFont();
bool ParseFontWeight(nsCSSValue& aValue);
bool ParseOneFamily(nsAString& aValue);
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 ParseOutline();
bool ParseOverflow();
bool ParsePadding();
bool ParseQuotes();
bool ParseSize();
bool ParseTextDecoration();
bool ParseTextDecorationLine(nsCSSValue& aValue);
bool ParseTextOverflow(nsCSSValue& aValue);
bool ParseUnicodeBidi(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();
// Reused utility parsing routines
void AppendValue(nsCSSProperty aPropID, const nsCSSValue& aValue);
bool ParseBoxProperties(const nsCSSProperty aPropIDs[]);
bool ParseGroupedBoxProperty(PRInt32 aVariantMask,
nsCSSValue& aValue);
bool ParseDirectionalBoxProperty(nsCSSProperty aProperty,
PRInt32 aSourceType);
bool ParseBoxCornerRadius(const nsCSSProperty aPropID);
bool ParseBoxCornerRadii(const nsCSSProperty aPropIDs[]);
PRInt32 ParseChoice(nsCSSValue aValues[],
const nsCSSProperty aPropIDs[], PRInt32 aNumIDs);
bool ParseColor(nsCSSValue& aValue);
bool ParseColorComponent(PRUint8& aComponent,
PRInt32& 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(PRUint8& aOpacity);
bool ParseEnum(nsCSSValue& aValue, const PRInt32 aKeywordTable[]);
bool ParseVariant(nsCSSValue& aValue,
PRInt32 aVariantMask,
const PRInt32 aKeywordTable[]);
bool ParseNonNegativeVariant(nsCSSValue& aValue,
PRInt32 aVariantMask,
const PRInt32 aKeywordTable[]);
bool ParseOneOrLargerVariant(nsCSSValue& aValue,
PRInt32 aVariantMask,
const PRInt32 aKeywordTable[]);
bool ParseCounter(nsCSSValue& aValue);
bool ParseAttr(nsCSSValue& aValue);
bool SetValueToURL(nsCSSValue& aValue, const nsString& aURL);
bool TranslateDimension(nsCSSValue& aValue, PRInt32 aVariantMask,
float aNumber, const nsString& aUnit);
bool ParseImageRect(nsCSSValue& aImage);
bool ParseElement(nsCSSValue& aValue);
bool ParseColorStop(nsCSSValueGradient* aGradient);
bool ParseGradient(nsCSSValue& aValue, bool aIsRadial,
bool aIsRepeating);
void SetParsingCompoundProperty(bool aBool) {
mParsingCompoundProperty = aBool;
}
bool IsParsingCompoundProperty(void) const {
return mParsingCompoundProperty;
}
/* Functions for transform Parsing */
bool ParseSingleTransform(nsCSSValue& aValue, bool& aIs3D);
bool ParseFunction(const nsString &aFunction, const PRInt32 aAllowedTypes[],
PRUint16 aMinElems, PRUint16 aMaxElems,
nsCSSValue &aValue);
bool ParseFunctionInternals(const PRInt32 aVariantMask[],
PRUint16 aMinElems,
PRUint16 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 and sets mFoundUnresolvablePrefix to true. */
PRInt32 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;
// 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 if unsafe rules should be allowed
bool mUnsafeRulesEnabled : 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;
// GetNamespaceIdForPrefix will set mFoundUnresolvablePrefix to true
// when it encounters a prefix that is not mapped to a namespace.
bool mFoundUnresolvablePrefix : 1;
#ifdef DEBUG
bool mScannerInited : 1;
#endif
// 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 AppendRuleToArray(css::Rule* aRule, void* aArray)
{
static_cast<nsCOMArray<css::Rule>*>(aArray)->AppendObject(aRule);
}
static void AppendRuleToSheet(css::Rule* aRule, void* aParser)
{
CSSParserImpl* parser = (CSSParserImpl*) aParser;
parser->AppendRule(aRule);
}
#ifdef CSS_REPORT_PARSE_ERRORS
#define REPORT_UNEXPECTED(msg_) \
mScanner.ReportUnexpected(#msg_)
#define REPORT_UNEXPECTED_P(msg_, params_) \
mScanner.ReportUnexpectedParams(#msg_, params_)
#define REPORT_UNEXPECTED_EOF(lf_) \
mScanner.ReportUnexpectedEOF(#lf_)
#define REPORT_UNEXPECTED_EOF_CHAR(ch_) \
mScanner.ReportUnexpectedEOF(ch_)
#define REPORT_UNEXPECTED_TOKEN(msg_) \
mScanner.ReportUnexpectedToken(mToken, #msg_)
#define REPORT_UNEXPECTED_TOKEN_P(msg_, params_) \
mScanner.ReportUnexpectedTokenParams(mToken, #msg_, \
params_, ArrayLength(params_))
#define OUTPUT_ERROR() \
mScanner.OutputError()
#define CLEAR_ERROR() \
mScanner.ClearError()
#else
#define REPORT_UNEXPECTED(msg_)
#define REPORT_UNEXPECTED_P(msg_, params_)
#define REPORT_UNEXPECTED_EOF(lf_)
#define REPORT_UNEXPECTED_EOF_CHAR(ch_)
#define REPORT_UNEXPECTED_TOKEN(msg_)
#define REPORT_UNEXPECTED_TOKEN_P(msg_, params_)
#define OUTPUT_ERROR()
#define CLEAR_ERROR()
#endif
CSSParserImpl::CSSParserImpl()
: mToken(),
mScanner(),
mChildLoader(nsnull),
mSection(eCSSSection_Charset),
mNameSpaceMap(nsnull),
mHavePushBack(false),
mNavQuirkMode(false),
mUnsafeRulesEnabled(false),
mHTMLMediaMode(false),
mParsingCompoundProperty(false),
mFoundUnresolvablePrefix(false)
#ifdef DEBUG
, mScannerInited(false)
#endif
, mNextFree(nsnull)
{
}
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 = nsnull;
}
}
return NS_OK;
}
nsresult
CSSParserImpl::SetQuirkMode(bool aQuirkMode)
{
mNavQuirkMode = aQuirkMode;
return NS_OK;
}
nsresult
CSSParserImpl::SetSVGMode(bool aSVGMode)
{
mScanner.SetSVGMode(aSVGMode);
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(! mScannerInited, "resetting with scanner active");
SetStyleSheet(nsnull);
SetQuirkMode(false);
SetSVGMode(false);
SetChildLoader(nsnull);
}
void
CSSParserImpl::InitScanner(const nsSubstring& aString, nsIURI* aSheetURI,
PRUint32 aLineNumber, nsIURI* aBaseURI,
nsIPrincipal* aSheetPrincipal)
{
// Having it not own the string is OK since the caller will hold on to
// the stream until we're done parsing.
NS_ASSERTION(! mScannerInited, "already have scanner");
mScanner.Init(aString, aSheetURI, aLineNumber, mSheet, mChildLoader);
#ifdef DEBUG
mScannerInited = true;
#endif
mBaseURI = aBaseURI;
mSheetURI = aSheetURI;
mSheetPrincipal = aSheetPrincipal;
mHavePushBack = false;
}
void
CSSParserImpl::ReleaseScanner(void)
{
mScanner.Close();
#ifdef DEBUG
mScannerInited = false;
#endif
mBaseURI = nsnull;
mSheetURI = nsnull;
mSheetPrincipal = nsnull;
}
nsresult
CSSParserImpl::ParseSheet(const nsAString& aInput,
nsIURI* aSheetURI,
nsIURI* aBaseURI,
nsIPrincipal* aSheetPrincipal,
PRUint32 aLineNumber,
bool aAllowUnsafeRules)
{
NS_PRECONDITION(aSheetPrincipal, "Must have principal here!");
NS_ASSERTION(nsnull != aBaseURI, "need base URI");
NS_ASSERTION(nsnull != aSheetURI, "need sheet URI");
AssertInitialState();
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
InitScanner(aInput, aSheetURI, aLineNumber, aBaseURI, aSheetPrincipal);
PRInt32 ruleCount = mSheet->StyleRuleCount();
if (0 < ruleCount) {
css::Rule* lastRule = nsnull;
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!");
AssertInitialState();
NS_ASSERTION(nsnull != aBaseURI, "need base URI");
// XXX line number?
InitScanner(aAttributeValue, aDocURI, 0, 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;
}
css::Declaration* declaration = ParseDeclarationBlock(haveBraces);
if (declaration) {
// Create a style rule for the declaration
NS_ADDREF(*aResult = new css::StyleRule(nsnull, declaration));
} else {
*aResult = nsnull;
}
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)
{
NS_PRECONDITION(aSheetPrincipal, "Must have principal here!");
AssertInitialState();
*aChanged = false;
InitScanner(aBuffer, aSheetURI, 0, aBaseURI, aSheetPrincipal);
mSection = eCSSSection_General;
mData.AssertInitialState();
aDeclaration->ClearData();
// We could check if it was already empty, but...
*aChanged = true;
for (;;) {