emailuis/uicomponents/inc/fstextstylemanager.h
author Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
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/*
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* Copyright (c) 2007-2007 Nokia Corporation and/or its subsidiary(-ies). 
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* All rights reserved.
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* This component and the accompanying materials are made available
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* under the terms of "Eclipse Public License v1.0"
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* which accompanies this distribution, and is available
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* at the URL "http://www.eclipse.org/legal/epl-v10.html".
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*
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* Initial Contributors:
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* Nokia Corporation - initial contribution.
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*
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* Contributors:
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*
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* Description:  This component converts CRichText style's to HuiTextStyle
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*
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*/
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#ifndef C_FSTEXTSTYLEMANAGER_H
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#define C_FSTEXTSTYLEMANAGER_H
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#include <e32base.h>
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#include <txtfrmat.h>
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class CAlfTextStyleManager;
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/**
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 *  TFsTextStyleData
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 *   
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 *  This class is meant only for internal use of CFsTextStyleManager. It
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 *  encapsulates the style information for storage.
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 *
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 *  @since S60 v3.2
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 */
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class TFsTextStyleData
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{
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public:
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	TFsTextStyleData( const TCharFormat& aCharFormat, TInt aTextStyleID );
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    /**
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     * Match
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     *
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     * Method for comparing to instances of TFsTextStyleData
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     * 
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     * @since S60 3.2
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     * @param aFirst The first TFsTextStyleData
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     * @param aSecond The other TFsTextStyleData
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     * @return If match ETrue else EFalse
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     */	
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	static TBool Match( const TFsTextStyleData& aFirst, 
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			const TFsTextStyleData& aSecond );
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	static TBool MatchId( const TFsTextStyleData& aFirst, 
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			const TFsTextStyleData& aSecond );
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public: //Data
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	/**
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	 * Stored TCharFormat
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	 */
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	const TCharFormat iCharFormat;
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    /**
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     * Stored THuiTextStyle id
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     */
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	TInt iTextStyleID;
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};
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/**
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 *  CFsTextStyleManager
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 *   
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 *  This class is designed to convert CRichText style definitions to
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 *  THuiTextStyles. To avoid overlapping style definitions, all previously
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 *  created styles are stored in a list.
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 *
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 *  Example:
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 *  @code
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 *
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 *  manager = CFsTextStyleManager::NewL( Env().TextStyleManager() );
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 *  rText.GetChars( someText, charFormat, position ); //CRichText
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 *  TInt styleID = manager->GetStyleIDL( charFormat );
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 *  visual = CHuiTextVisual::AddNewL( *iControl, iCurveLayout );
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 *  visual->SetTextStyle( styleID );
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 *  
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 *  @endcode
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 *
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 *  @since S60 v3.2
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 */
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class CFsTextStyleManager : CBase
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    {
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public:
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	/**
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	 * Two-phased constructor.
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	 * @param aHuiTextStyleManager Reference to the CHuiTextStyleManager
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	 */
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     static CFsTextStyleManager* NewL( CAlfTextStyleManager& aAlfTextStyleManager );
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     /**
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      * Destructor.
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      */
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     ~CFsTextStyleManager();
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     /**
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      * GetStyleIDL
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      * 
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      * This is the only public method in CFsTextStyleManager. If there
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      * already a style that matches the given TCharFormat, the ID of this
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      * style is returned. If not, a new style is created.
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      *
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      * @since S60 3.2
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      * @param aCharFormat Style format from CRichText
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      * @return ID for THuiTextStyle
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      */
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     TInt GetStyleIDL( const TCharFormat& aCharFormat );
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     /**
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      * FindId
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      * 
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      * The array of previously created styles is searched for matching
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      * TCharFormat. If not found KErrNotFound is returned.
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      *
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      * @since S60 3.2
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      * @param aCharFormat Style format from CRichText
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      * @return ID for THuiTextStyle or KErrNotFound
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      */
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     TInt GetStyleIDWithOpositeUnderlineL( TInt aId );
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private:
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		CFsTextStyleManager( CAlfTextStyleManager& aAlfTextStyleManager );
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		// void ConstructL(); This wasn't needed at the time 
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	     /**
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	      * FindId
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	      * 
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	      * The array of previously created styles is searched for matching
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	      * TCharFormat. If not found KErrNotFound is returned.
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	      *
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	      * @since S60 3.2
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	      * @param aCharFormat Style format from CRichText
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	      * @return ID for THuiTextStyle or KErrNotFound
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	      */
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        TInt FindId( const TCharFormat& aCharFormat );
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        /**
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	      * FindPositionOfId
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	      * 
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	      * The array of previously created styles is searched for matching
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	      * ID. If not found KErrNotFound is returned.
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	      *
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	      * @since S60 3.2
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	      * @param ID Style format from CRichText
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	      * @return position in table for THuiTextStyle or KErrNotFound
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	      */
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        TInt FindPositionOfId(TInt aId);
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	     /**
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	      * CreateNewTextStyleL
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	      * 
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	      * Creates a new text style using TCharFormat.
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	      *
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	      * @since S60 3.2
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	      * @param aCharFormat Style format from CRichText
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	      * @return ID for THuiTextStyle
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	      */
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        TInt CreateNewTextStyleL( const TCharFormat& aCharFormat );
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private: // data
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    /**
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     * Reference to the CHuiTextStyleManager
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     */
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    CAlfTextStyleManager& iAlfTextStyleManager;
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    /**
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     * Array of previously created styles
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     */
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    RArray<TFsTextStyleData> iStyles;
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    };
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#endif // C_FSTEXTSTYLEMANAGER_H