1 /*

     2 * Copyright (c) 2003 Nokia Corporation and/or its subsidiary(-ies).

     3 * All rights reserved.

     4 * This component and the accompanying materials are made available

     5 * under the terms of the License "Eclipse Public License v1.0"

     6 * which accompanies this distribution, and is available

     7 * at the URL "http://www.eclipse.org/legal/epl-v10.html".

     8 *

     9 * Initial Contributors:

    10 * Nokia Corporation - initial contribution.

    11 *

    12 * Contributors:

    13 *

    14 * Description:  Parses CSS styles

    15 *

    16 */

    17 

    18 

    19 #ifndef TCSSParser_H

    20 #define TCSSParser_H

    21 

    22 //  INCLUDES

    23 #include "nw_object_dynamic.h"

    24 #include "NW_CSS_EXPORT.h"

    25 #include "CSSEventListener.h"

    26 #include "CSSReader.h"

    27   

    28 // CONSTANTS

    29 

    30 // MACROS

    31 

    32 // DATA TYPES

    33 

    34 enum TCSSConditionType

    35 {

    36   ID_CONDITION = 1,

    37   CLASS_CONDITION,

    38   ATTRIBUTE_CONDITION,

    39   ACTIVE_CONDITION,

    40   LINK_CONDITION,

    41   VISITED_CONDITION,

    42   FOCUS_CONDITION

    43 };

    44 

    45 // FUNCTION PROTOTYPES

    46 

    47 // FORWARD DECLARATIONS

    48 

    49 // CLASS DECLARATION

    50 

    51 /**

    52 *  This class is the parser for CSS

    53 *  @lib css.lib

    54 *  @since 2.1

    55 */

    56 class TCSSParser

    57 {

    58   public:

    59     // constructor

    60 	  TCSSParser(TText8* aBuffer, TUint32 aLength, TUint32 aEncoding) 

    61       {  

    62         iReader.Init(aBuffer, aLength, aEncoding);

    63         iEventListener = NULL;

    64       }

    65 

    66     TCSSParser()

    67       {

    68         iEventListener = NULL;

    69       } 

    70 

    71     void Init(TText8* aBuffer, TUint32 aLength, TUint32 aEncoding) 

    72       {  

    73         iReader.Init(aBuffer, aLength, aEncoding);

    74         iEventListener = NULL;

    75       }

    76 

    77   public: // New functions

    78 

    79     TBrowserStatusCode ParseStyleSheet(MCSSEventListener* aEventListener);

    80 

    81     TBrowserStatusCode SimpleSelectorListIterate(TCSSSimpleSelector* aSimpleSelector);

    82 

    83     TBrowserStatusCode ConditionListIterate(TText8* aConditionType,

    84                                      TCSSReaderUnit *aValue1,

    85                                      TCSSReaderUnit *aValue2);

    86 

    87     TBrowserStatusCode DeclarationListIterate(TCSSReaderUnit* aProperty,

    88                                    TCSSPropertyVal* aPropertyVal,

    89                                    TUint8 *aNumVals,

    90                                    TUint8 maxVals,

    91                                    TBool* aImportant);

    92 

    93 

    94     TBrowserStatusCode ParserRGB(TCSSPropertyVal* aRVal,

    95                           TCSSPropertyVal* aGVal,

    96                           TCSSPropertyVal* aBVal);

    97 

    98 

    99     TUint32 ParseCharset();

   100 

   101     void SetPosition(TText8* aPosition);

   102 

   103     inline TUint32 GetEncoding(){return iReader.GetEncoding();}

   104 

   105     inline TCSSReader* GetReader() {return &iReader;}

   106 

   107     inline TText8* GetPosition(){ return iReader.GetBufferPointer();}

   108 

   109     private: //methods

   110 

   111       TBool ParseElementName(TCSSReaderUnit* aNameSpace, TCSSReaderUnit* aElementName);

   112 

   113       TBrowserStatusCode SelectorListIterate(TCSSReaderUnit* aTargetElement,

   114                                       TUint32 *aSpecificity);

   115 

   116       TBrowserStatusCode ParseRule();

   117 

   118       TBool HasValidMedia();

   119 

   120       TBrowserStatusCode ParseImportRule();

   121 

   122       TBrowserStatusCode ParseMediaRule();

   123 

   124       TBrowserStatusCode ParseStyleRules();

   125 

   126       TBrowserStatusCode ParseHeader();

   127 

   128       TBrowserStatusCode ParserPropertyVal(TCSSPropertyVal* aPropertyVal);

   129 

   130     private:    // Data

   131 

   132       // lexer

   133       TCSSReader iReader;

   134       // event listener to get the CSS events like start Selector

   135       MCSSEventListener* iEventListener;

   136 };

   137 #endif /* TCSSParser_H */