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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 -*- */
/* ***** BEGIN LICENSE BLOCK *****
* Version: MPL 1.1/GPL 2.0/LGPL 2.1
*
* The contents of this file are subject to the Mozilla Public License Version
* 1.1 (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
* http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the
* License.
*
* The Original Code is mozilla.org code.
*
* The Initial Developer of the Original Code is
* Netscape Communications Corporation.
* Portions created by the Initial Developer are Copyright (C) 1998
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
* emk <VYV03354@nifty.ne.jp>
* Daniel Glazman <glazman@netscape.com>
* L. David Baron <dbaron@dbaron.org>
* Boris Zbarsky <bzbarsky@mit.edu>
* Mats Palmgren <mats.palmgren@bredband.net>
* Christian Biesinger <cbiesinger@web.de>
* Jeff Walden <jwalden+code@mit.edu>
* Jonathon Jongsma <jonathon.jongsma@collabora.co.uk>, Collabora Ltd.
* Siraj Razick <siraj.razick@collabora.co.uk>, Collabora Ltd.
*
* Alternatively, the contents of this file may be used under the terms of
* either of the GNU General Public License Version 2 or later (the "GPL"),
* or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
* in which case the provisions of the GPL or the LGPL are applicable instead
* of those above. If you wish to allow use of your version of this file only
* under the terms of either the GPL or the LGPL, and not to allow others to
* use your version of this file under the terms of the MPL, indicate your
* decision by deleting the provisions above and replace them with the notice
* and other provisions required by the GPL or the LGPL. If you do not delete
* the provisions above, a recipient may use your version of this file under
* the terms of any one of the MPL, the GPL or the LGPL.
*
* ***** END LICENSE BLOCK ***** */
/* 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 "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 "nsPrintfCString.h"
#include "nsIMediaList.h"
#include "nsILookAndFeel.h"
#include "nsStyleUtil.h"
#include "nsIPrincipal.h"
#include "prprf.h"
#include "math.h"
#include "nsContentUtils.h"
#include "nsDOMError.h"
#include "nsAutoPtr.h"
#include "nsTArray.h"
#include "prlog.h"
#include "CSSCalc.h"
#include "nsMediaFeatures.h"
namespace css = mozilla::css;
// 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
// Common combinations of variants
#define VARIANT_AL (VARIANT_AUTO | VARIANT_LENGTH)
#define VARIANT_LP (VARIANT_LENGTH | VARIANT_PERCENT)
#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_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_TRANSFORM_LPCALC (VARIANT_LP | VARIANT_CALC)
#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_, 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(PRBool aQuirkMode);
#ifdef MOZ_SVG
nsresult SetSVGMode(PRBool aSVGMode);
#endif
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,
PRBool 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,
PRBool* 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,
PRBool* aChanged,
PRBool aIsImportant);
nsresult ParseMediaList(const nsSubstring& aBuffer,
nsIURI* aURL, // for error reporting
PRUint32 aLineNumber, // for error reporting
nsMediaList* aMediaList,
PRBool 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);
#ifdef MOZ_CSS_ANIMATIONS
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
nsTArray<float>& aSelectorList);
#endif
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(PR_TRUE);
}
~nsAutoParseCompoundProperty()
{
mParser->SetParsingCompoundProperty(PR_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);
#ifdef MOZ_SVG
PRBool IsSVGMode() const {
return mScanner.IsSVGMode();
}
#endif
PRBool GetToken(PRBool 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.
PRBool GetURLInParens(nsString& aURL);
void AssertInitialState() {
NS_PRECONDITION(!mHTMLMediaMode, "Bad initial state");
NS_PRECONDITION(!mParsingCompoundProperty, "Bad initial state");
}
PRBool ExpectSymbol(PRUnichar aSymbol, PRBool aSkipWS);
PRBool ExpectEndProperty();
PRBool CheckEndProperty();
nsSubstring* NextIdent();
void SkipUntil(PRUnichar aStopSymbol);
void SkipUntilOneOf(const PRUnichar* aStopSymbolChars);
void SkipRuleSet(PRBool aInsideBraces);
PRBool SkipAtRule(PRBool aInsideBlock);
PRBool SkipDeclaration(PRBool aCheckForBraces);
PRBool PushGroup(css::GroupRule* aRule);
void PopGroup();
PRBool ParseRuleSet(RuleAppendFunc aAppendFunc, void* aProcessData,
PRBool aInsideBraces = PR_FALSE);
PRBool ParseAtRule(RuleAppendFunc aAppendFunc, void* aProcessData);
PRBool ParseCharsetRule(RuleAppendFunc aAppendFunc, void* aProcessData);
PRBool ParseImportRule(RuleAppendFunc aAppendFunc, void* aProcessData);
PRBool ParseURLOrString(nsString& aURL);
PRBool GatherMedia(nsMediaList* aMedia,
PRBool aInAtRule);
PRBool ParseMediaQuery(PRBool aInAtRule, nsMediaQuery **aQuery,
PRBool *aParsedSomething, PRBool *aHitStop);
PRBool ParseMediaQueryExpression(nsMediaQuery* aQuery);
void ProcessImport(const nsString& aURLSpec,
nsMediaList* aMedia,
RuleAppendFunc aAppendFunc,
void* aProcessData);
PRBool ParseGroupRule(css::GroupRule* aRule, RuleAppendFunc aAppendFunc,
void* aProcessData);
PRBool ParseMediaRule(RuleAppendFunc aAppendFunc, void* aProcessData);
PRBool ParseMozDocumentRule(RuleAppendFunc aAppendFunc, void* aProcessData);
PRBool ParseNameSpaceRule(RuleAppendFunc aAppendFunc, void* aProcessData);
void ProcessNameSpace(const nsString& aPrefix,
const nsString& aURLSpec, RuleAppendFunc aAppendFunc,
void* aProcessData);
PRBool ParseFontFaceRule(RuleAppendFunc aAppendFunc, void* aProcessData);
PRBool ParseFontDescriptor(nsCSSFontFaceRule* aRule);
PRBool ParseFontDescriptorValue(nsCSSFontDesc aDescID,
nsCSSValue& aValue);
PRBool ParsePageRule(RuleAppendFunc aAppendFunc, void* aProcessData);
#ifdef MOZ_CSS_ANIMATIONS
PRBool ParseKeyframesRule(RuleAppendFunc aAppendFunc, void* aProcessData);
already_AddRefed<nsCSSKeyframeRule> ParseKeyframeRule();
PRBool ParseKeyframeSelectorList(nsTArray<float>& aSelectorList);
#endif
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,
PRBool aIsNegated,
nsIAtom** aPseudoElement,
nsAtomList** aPseudoElementArgs,
nsCSSPseudoElements::Type* aPseudoElementType);
nsSelectorParsingStatus ParseAttributeSelector(PRInt32& aDataMask,
nsCSSSelector& aSelector);
nsSelectorParsingStatus ParseTypeOrUniversalSelector(PRInt32& aDataMask,
nsCSSSelector& aSelector,
PRBool 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.
PRBool ParseSelectorList(nsCSSSelectorList*& aListHead,
PRUnichar aStopChar);
PRBool ParseSelectorGroup(nsCSSSelectorList*& aListHead);
PRBool ParseSelector(nsCSSSelectorList* aList, PRUnichar aPrevCombinator);
css::Declaration* ParseDeclarationBlock(PRBool aCheckForBraces);
PRBool ParseDeclaration(css::Declaration* aDeclaration,
PRBool aCheckForBraces,
PRBool aMustCallValueAppended,
PRBool* aChanged);
PRBool ParseProperty(nsCSSProperty aPropID);
PRBool ParsePropertyByFunction(nsCSSProperty aPropID);
PRBool ParseSingleValueProperty(nsCSSValue& aValue,
nsCSSProperty aPropID);
enum PriorityParsingStatus {
ePriority_None,
ePriority_Important,
ePriority_Error
};
PriorityParsingStatus ParsePriority();
#ifdef MOZ_XUL
PRBool ParseTreePseudoElement(nsAtomList **aPseudoElementArgs);
#endif
void InitBoxPropsAsPhysical(const nsCSSProperty *aSourceProperties);
// Property specific parsing routines
PRBool ParseBackground();
struct BackgroundParseState {
nsCSSValue& mColor;
nsCSSValueList* mImage;
nsCSSValueList* mRepeat;
nsCSSValueList* mAttachment;
nsCSSValueList* mClip;
nsCSSValueList* mOrigin;
nsCSSValuePairList* mPosition;
nsCSSValuePairList* mSize;
BackgroundParseState(
nsCSSValue& aColor, nsCSSValueList* aImage, nsCSSValueList* aRepeat,
nsCSSValueList* aAttachment, nsCSSValueList* aClip,
nsCSSValueList* aOrigin, nsCSSValuePairList* aPosition,
nsCSSValuePairList* aSize) :
mColor(aColor), mImage(aImage), mRepeat(aRepeat),
mAttachment(aAttachment), mClip(aClip), mOrigin(aOrigin),
mPosition(aPosition), mSize(aSize) {};
};
PRBool ParseBackgroundItem(BackgroundParseState& aState);
PRBool ParseValueList(nsCSSProperty aPropID); // a single value prop-id
PRBool ParseBackgroundPosition();
PRBool ParseBoxPositionValues(nsCSSValuePair& aOut, PRBool aAcceptsInherit);
PRBool ParseBackgroundSize();
PRBool ParseBackgroundSizeValues(nsCSSValuePair& aOut);
PRBool ParseBorderColor();
PRBool ParseBorderColors(nsCSSProperty aProperty);
PRBool ParseBorderImage();
PRBool ParseBorderSpacing();
PRBool ParseBorderSide(const nsCSSProperty aPropIDs[],
PRBool aSetAllSides);
PRBool ParseDirectionalBorderSide(const nsCSSProperty aPropIDs[],
PRInt32 aSourceType);
PRBool ParseBorderStyle();
PRBool ParseBorderWidth();
PRBool ParseCalc(nsCSSValue &aValue, PRInt32 aVariantMask);
PRBool ParseCalcAdditiveExpression(nsCSSValue& aValue,
PRInt32& aVariantMask);
PRBool ParseCalcMultiplicativeExpression(nsCSSValue& aValue,
PRInt32& aVariantMask,
PRBool *aHadFinalWS);
PRBool ParseCalcTerm(nsCSSValue& aValue, PRInt32& aVariantMask);
PRBool RequireWhitespace();
// for 'clip' and '-moz-image-region'
PRBool ParseRect(nsCSSProperty aPropID);
PRBool ParseContent();
PRBool ParseCounterData(nsCSSProperty aPropID);
PRBool ParseCursor();
PRBool ParseFont();
PRBool ParseFontWeight(nsCSSValue& aValue);
PRBool ParseOneFamily(nsAString& aValue);
PRBool ParseFamily(nsCSSValue& aValue);
PRBool ParseFontSrc(nsCSSValue& aValue);
PRBool ParseFontSrcFormat(nsTArray<nsCSSValue>& values);
PRBool ParseFontRanges(nsCSSValue& aValue);
PRBool ParseListStyle();
PRBool ParseMargin();
PRBool ParseMarks(nsCSSValue& aValue);
PRBool ParseMozTransform();
PRBool ParseOutline();
PRBool ParseOverflow();
PRBool ParsePadding();
PRBool ParseQuotes();
PRBool ParseSize();
PRBool ParseTextDecoration();
PRBool ParseTextDecorationLine(nsCSSValue& aValue);
PRBool ParseShadowItem(nsCSSValue& aValue, PRBool aIsBoxShadow);
PRBool ParseShadowList(nsCSSProperty aProperty);
PRBool ParseTransitionProperty();
PRBool ParseTransitionTimingFunctionValues(nsCSSValue& aValue);
PRBool ParseTransitionTimingFunctionValueComponent(float& aComponent,
char aStop,
PRBool aCheckRange);
PRBool ParseTransitionStepTimingFunctionValues(nsCSSValue& aValue);
enum ParseAnimationOrTransitionShorthandResult {
eParseAnimationOrTransitionShorthand_Values,
eParseAnimationOrTransitionShorthand_Inherit,
eParseAnimationOrTransitionShorthand_Error
};
ParseAnimationOrTransitionShorthandResult
ParseAnimationOrTransitionShorthand(const nsCSSProperty* aProperties,
const nsCSSValue* aInitialValues,
nsCSSValue* aValues,
size_t aNumProperties);
PRBool ParseTransition();
#ifdef MOZ_CSS_ANIMATIONS
PRBool ParseAnimation();
#endif
#ifdef MOZ_SVG
PRBool ParsePaint(nsCSSProperty aPropID);
PRBool ParseDasharray();
PRBool ParseMarker();
#endif
// Reused utility parsing routines
void AppendValue(nsCSSProperty aPropID, const nsCSSValue& aValue);
PRBool ParseBoxProperties(const nsCSSProperty aPropIDs[]);
PRBool ParseDirectionalBoxProperty(nsCSSProperty aProperty,
PRInt32 aSourceType);
PRBool ParseBoxCornerRadius(const nsCSSProperty aPropID);
PRBool ParseBoxCornerRadii(const nsCSSProperty aPropIDs[]);
PRInt32 ParseChoice(nsCSSValue aValues[],
const nsCSSProperty aPropIDs[], PRInt32 aNumIDs);
PRBool ParseColor(nsCSSValue& aValue);
PRBool ParseColorComponent(PRUint8& aComponent,
PRInt32& aType, char aStop);
// ParseHSLColor parses everything starting with the opening '('
// up through and including the aStop char.
PRBool ParseHSLColor(nscolor& aColor, char aStop);
// ParseColorOpacity will enforce that the color ends with a ')'
// after the opacity
PRBool ParseColorOpacity(PRUint8& aOpacity);
PRBool ParseEnum(nsCSSValue& aValue, const PRInt32 aKeywordTable[]);
PRBool ParseVariant(nsCSSValue& aValue,
PRInt32 aVariantMask,
const PRInt32 aKeywordTable[]);
PRBool ParseNonNegativeVariant(nsCSSValue& aValue,
PRInt32 aVariantMask,
const PRInt32 aKeywordTable[]);
PRBool ParseOneOrLargerVariant(nsCSSValue& aValue,
PRInt32 aVariantMask,
const PRInt32 aKeywordTable[]);
PRBool ParseCounter(nsCSSValue& aValue);
PRBool ParseAttr(nsCSSValue& aValue);
PRBool SetValueToURL(nsCSSValue& aValue, const nsString& aURL);
PRBool TranslateDimension(nsCSSValue& aValue, PRInt32 aVariantMask,
float aNumber, const nsString& aUnit);
PRBool ParseImageRect(nsCSSValue& aImage);
PRBool ParseElement(nsCSSValue& aValue);
PRBool ParseColorStop(nsCSSValueGradient* aGradient);
PRBool ParseGradient(nsCSSValue& aValue, PRBool aIsRadial,
PRBool aIsRepeating);
void SetParsingCompoundProperty(PRBool aBool) {
NS_ASSERTION(aBool == PR_TRUE || aBool == PR_FALSE, "bad PRBool value");
mParsingCompoundProperty = aBool;
}
PRBool IsParsingCompoundProperty(void) const {
return mParsingCompoundProperty;
}
/* Functions for -moz-transform Parsing */
PRBool ParseSingleTransform(nsCSSValue& aValue);
PRBool ParseFunction(const nsString &aFunction, const PRInt32 aAllowedTypes[],
PRUint16 aMinElems, PRUint16 aMaxElems,
nsCSSValue &aValue);
PRBool ParseFunctionInternals(const PRInt32 aVariantMask[],
PRUint16 aMinElems,
PRUint16 aMaxElems,
nsTArray<nsCSSValue>& aOutput);
/* Functions for -moz-transform-origin Parsing */
PRBool ParseMozTransformOrigin();
/* 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.
PRPackedBool mHavePushBack : 1;
// True if we are in quirks mode; false in standards or almost standards mode
PRPackedBool mNavQuirkMode : 1;
// True if unsafe rules should be allowed
PRPackedBool mUnsafeRulesEnabled : 1;
// True for parsing media lists for HTML attributes, where we have to
// ignore CSS comments.
PRPackedBool mHTMLMediaMode : 1;
// This flag is set when parsing a non-box shorthand; it's used to not apply
// some quirks during shorthand parsing
PRPackedBool mParsingCompoundProperty : 1;
// GetNamespaceIdForPrefix will set mFoundUnresolvablePrefix to true
// when it encounters a prefix that is not mapped to a namespace.
PRPackedBool mFoundUnresolvablePrefix : 1;
#ifdef DEBUG
PRPackedBool mScannerInited : 1;
#endif
// Stack of rule groups; used for @media and such.
nsTArray<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_, NS_ARRAY_LENGTH(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_, NS_ARRAY_LENGTH(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(PR_FALSE),
mNavQuirkMode(PR_FALSE),
mUnsafeRulesEnabled(PR_FALSE),
mHTMLMediaMode(PR_FALSE),
mParsingCompoundProperty(PR_FALSE),
mFoundUnresolvablePrefix(PR_FALSE)
#ifdef DEBUG
, mScannerInited(PR_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(PRBool aQuirkMode)
{
NS_ASSERTION(aQuirkMode == PR_TRUE || aQuirkMode == PR_FALSE, "bad PRBool value");
mNavQuirkMode = aQuirkMode;
return NS_OK;
}
#ifdef MOZ_SVG
nsresult
CSSParserImpl::SetSVGMode(PRBool aSVGMode)
{
NS_ASSERTION(aSVGMode == PR_TRUE || aSVGMode == PR_FALSE,
"bad PRBool value");
mScanner.SetSVGMode(aSVGMode);
return NS_OK;
}
#endif
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(PR_FALSE);
#ifdef MOZ_SVG
SetSVGMode(PR_FALSE);
#endif // MOZ_SVG
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(nsnull, aString.BeginReading(), aString.Length(), aSheetURI,
aLineNumber, mSheet, mChildLoader);
#ifdef DEBUG
mScannerInited = PR_TRUE;
#endif
mBaseURI = aBaseURI;
mSheetURI = aSheetURI;
mSheetPrincipal = aSheetPrincipal;
mHavePushBack = PR_FALSE;
}
void
CSSParserImpl::ReleaseScanner(void)
{
mScanner.Close();
#ifdef DEBUG
mScannerInited = PR_FALSE;
#endif
mBaseURI = nsnull;
mSheetURI = nsnull;
mSheetPrincipal = nsnull;
}
nsresult
CSSParserImpl::ParseSheet(const nsAString& aInput,
nsIURI* aSheetURI,
nsIURI* aBaseURI,
nsIPrincipal* aSheetPrincipal,
PRUint32 aLineNumber,
PRBool 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();
PRBool 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(PR_TRUE)) {
OUTPUT_ERROR();
break;
}
if (eCSSToken_HTMLComment == tk->mType) {
continue; // legal here only
}
if (eCSSToken_AtKeyword == tk->mType) {
ParseAtRule(AppendRuleToSheet, this);
continue;
}
UngetToken();
if (ParseRuleSet(AppendRuleToSheet, this)) {
mSection = eCSSSection_General;
}
}
ReleaseScanner();
mUnsafeRulesEnabled = PR_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 PRBool
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).
PRBool haveBraces;
if (mNavQuirkMode && GetToken(PR_TRUE)) {
haveBraces = eCSSToken_Symbol == mToken.mType &&
'{' == mToken.mSymbol;
UngetToken();
}
else {
haveBraces = PR_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;
}