cssparser.h

00001 /*
00002  * This file is part of the DOM implementation for KDE.
00003  *
00004  * Copyright (C) 2003 Lars Knoll (knoll@kde.org)
00005  *
00006  * This library is free software; you can redistribute it and/or
00007  * modify it under the terms of the GNU Library General Public
00008  * License as published by the Free Software Foundation; either
00009  * version 2 of the License, or (at your option) any later version.
00010  *
00011  * This library is distributed in the hope that it will be useful,
00012  * but WITHOUT ANY WARRANTY; without even the implied warranty of
00013  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00014  * Library General Public License for more details.
00015  *
00016  * You should have received a copy of the GNU Library General Public License
00017  * along with this library; see the file COPYING.LIB.  If not, write to
00018  * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
00019  * Boston, MA 02110-1301, USA.
00020  */
00021 #ifndef _CSS_cssparser_h_
00022 #define _CSS_cssparser_h_
00023 
00024 #include <qstring.h>
00025 #include <qcolor.h>
00026 #include <dom/dom_string.h>
00027 
00028 namespace DOM {
00029     class StyleListImpl;
00030     class CSSStyleSheetImpl;
00031     class CSSRuleImpl;
00032     class CSSStyleRuleImpl;
00033     class DocumentImpl;
00034     class CSSValueImpl;
00035     class CSSValueListImpl;
00036     class CSSPrimitiveValueImpl;
00037     class CSSStyleDeclarationImpl;
00038     class CSSProperty;
00039     class CSSRuleListImpl;
00040 
00041 
00042     struct ParseString {
00043     unsigned short *string;
00044     int length;
00045     };
00046 
00047     struct Value;
00048     class ValueList;
00049 
00050     struct Function {
00051     ParseString name;
00052     ValueList *args;
00053     };
00054 
00055     struct Value {
00056     int id;
00057     union {
00058         double fValue;
00059         int iValue;
00060         ParseString string;
00061         struct Function *function;
00062     };
00063     enum {
00064         Operator = 0x100000,
00065         Function = 0x100001,
00066         Q_EMS     = 0x100002
00067     };
00068 
00069     int unit;
00070     };
00071 
00072     static inline QString qString( const ParseString &ps ) {
00073     return QString( (QChar *)ps.string, ps.length );
00074     }
00075     static inline DOMString domString( const ParseString &ps ) {
00076     return DOMString( (QChar *)ps.string, ps.length );
00077     }
00078 
00079     class ValueList {
00080     public:
00081     ValueList();
00082     ~ValueList();
00083     void addValue( const Value &val );
00084     Value *current() { return currentValue < numValues ? values + currentValue : 0; }
00085     Value *next() { ++currentValue; return current(); }
00086         bool isLast() const { return currentValue+1 >= numValues; }
00087     Value *values;
00088     int numValues;
00089     int maxValues;
00090     int currentValue;
00091     };
00092 
00093     class CSSParser
00094     {
00095     public:
00096     CSSParser( bool strictParsing = true );
00097     ~CSSParser();
00098 
00099     void parseSheet( DOM::CSSStyleSheetImpl *sheet, const DOM::DOMString &string );
00100     DOM::CSSRuleImpl *parseRule( DOM::CSSStyleSheetImpl *sheet, const DOM::DOMString &string );
00101     bool parseValue( DOM::CSSStyleDeclarationImpl *decls, int id, const DOM::DOMString &string,
00102              bool _important, bool _nonCSSHint );
00103     bool parseDeclaration( DOM::CSSStyleDeclarationImpl *decls, const DOM::DOMString &string,
00104                    bool _nonCSSHint );
00105 
00106     static CSSParser *current() { return currentParser; }
00107 
00108 
00109     DOM::DocumentImpl *document() const;
00110 
00111     void addProperty( int propId, CSSValueImpl *value, bool important );
00112     bool hasProperties() const { return numParsedProperties > 0; }
00113     CSSStyleDeclarationImpl *createStyleDeclaration( CSSStyleRuleImpl *rule );
00114     void clearProperties();
00115 
00116     bool parseValue( int propId, bool important, int expected=1 );
00117     bool parseShortHand( const int *properties, int numProperties, bool important );
00118     bool parse4Values( const int *properties, bool important );
00119     bool parseContent( int propId, bool important );
00120 
00121         CSSValueImpl* parseBackgroundColor();
00122         CSSValueImpl* parseBackgroundImage();
00123         CSSValueImpl* parseBackgroundPositionXY(bool& xFound, bool& yFound);
00124         void parseBackgroundPosition(CSSValueImpl*& value1, CSSValueImpl*& value2);
00125 
00126         bool parseBackgroundProperty(int propId, int& propId1, int& propId2, CSSValueImpl*& retValue1, CSSValueImpl*& retValue2);
00127         bool parseBackgroundShorthand(bool important);
00128 
00129         void addBackgroundValue(CSSValueImpl*& lval, CSSValueImpl* rval);
00130 
00131     bool parseShape( int propId, bool important );
00132     bool parseFont(bool important);
00133         bool parseCounter(int propId, bool increment, bool important);
00134 
00135         // returns the found property
00136         // 0 if nothing found (or ok == false)
00137         // @param forward if true, it parses the next in the list
00138     CSSValueListImpl *parseFontFamily();
00139         CSSPrimitiveValueImpl *parseColor();
00140         CSSPrimitiveValueImpl *parseColorFromValue(Value* val);
00141         CSSValueImpl* parseCounterContent(ValueList *args, bool counters);
00142 
00143         static bool parseColor(const QString &name, QRgb& rgb);
00144 
00145         // CSS3 Parsing Routines (for properties specific to CSS3)
00146         bool parseShadow(int propId, bool important);
00147 
00148     public:
00149     bool strict;
00150     bool important;
00151     bool nonCSSHint;
00152     unsigned int id;
00153     DOM::StyleListImpl* styleElement;
00154     DOM::CSSRuleImpl *rule;
00155     ValueList *valueList;
00156     CSSProperty **parsedProperties;
00157     int numParsedProperties;
00158     int maxParsedProperties;
00159     bool inParseShortHand;
00160     unsigned int defaultNamespace;
00161     static CSSParser *currentParser;
00162 
00163     // tokenizer methods and data
00164     public:
00165     int lex( void *yylval );
00166     int token() { return yyTok; }
00167     unsigned short *text( int *length);
00168     int lex();
00169     private:
00170     int yyparse();
00171         void runParser(int length);
00172 
00173     unsigned short *data;
00174     unsigned short *yytext;
00175     unsigned short *yy_c_buf_p;
00176     unsigned short yy_hold_char;
00177     int yy_last_accepting_state;
00178     unsigned short *yy_last_accepting_cpos;
00179         int block_nesting;
00180     int yyleng;
00181     int yyTok;
00182     int yy_start;
00183     };
00184 
00185 } // namespace
00186 #endif
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