/*

* Copyright (c) 2002-2005 Nokia Corporation and/or its subsidiary(-ies).

* All rights reserved.

* This component and the accompanying materials are made available

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

* which accompanies this distribution, and is available

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

*

* Initial Contributors:

* Nokia Corporation - initial contribution.

*

* Contributors:

*

* Description:  CAknFepVkbCompositionField

*

*/

#ifndef C_CAKNFEPVKBCOMPOSITIONFIELD_H

#define C_CAKNFEPVKBCOMPOSITIONFIELD_H

#include <peninputlayouteditareabase.h>

class MAknFepVkbDataProvider;

class CAknFepVkbPinyinAnalyser;

// property of Cpi engine, Private protocol since hard to modify ptiengine.h

const TInt KCpiMaxInputPhraseLen = 6;

/**

 *  Composition Element Type.

 *

 *  @lib peninputvkbcn.lib

 *  @since S60 v3.2 

 */

enum TCompositionElementType

    {

    EElementTypeCompositionChar = 0x0001, //normal char

    EElementTypeAutoSeparator = 0x0002,   //auto separator

    EElementTypeManualSeparator = 0x0004,  //manual separator

    EElementTypeSeparator = EElementTypeAutoSeparator | EElementTypeManualSeparator,

    EElementTypeTonemark = 0x0008,        //tomark

    EElementTypeAuxilian = EElementTypeSeparator | EElementTypeTonemark,

    EElementTypeConvertedChar = 0x0010    //converted char from engine

    };

class CAknFepVkbCompositionField;

/**

 *  CCompositionElement.

 *

 *  @lib peninputvkbcn.lib

 *  @since S60 v3.2 

 */

class CCompositionElement: public CBase

    {

public:

    /**

     * Symbian constructor.

     *

     * @since S60 v3.2

     * @param aKey Input key

     * @return Pointer to created CCompositionElement object

     */

    static CCompositionElement* NewLC(const TDesC& aKey);    

    /**

     * destructor

     *

     * @since S60 v3.2

     * @return None

     */

    virtual ~CCompositionElement();

    /**

     * Get the length of original input

     *

     * @since S60 v3.2

     * @return The length of original input

     */

    virtual TInt OriginalCount() const;

    /**

     * Undo convert

     *

     * @since S60 v3.2

     * @param aField The owner of unconverted components

     * @param aStartPos The insert position

     * @return Inserted elements count

     */

    virtual TInt UndoConvertL(CAknFepVkbCompositionField* aField, TInt aStartPos);

    /**

     * Get the key

     *

     * @since S60 v3.2

     * @return The key

     */

    inline const TDesC* Key() const;

    /**

     * Compare function

     *

     * @since S60 v3.2

     * @return ETrue if the key value is equal to aKeyValue,

     *         EFalse otherwise

     */

    inline TBool operator == (TUint aKeyValue) const;

    /**

     * Determine the type of element

     *

     * @since S60 v3.2

     * @param aType The type of element to judge

     * @return ETrue if it is, otherwise EFalse

     */

    inline TBool IsTypeOf(TCompositionElementType aType) const;

    /**

     * Is this element is a separator?

     *

     * @since S60 v3.2

     * @return ETrue if element is a separator; otherwise EFalse

     */

    inline TBool IsSeparator() const;

    /**

     * Is this element is an atuo separator?

     *

     * @since S60 v3.2

     * @return ETrue if element is an auto separator; otherwise EFalse

     */

    inline TBool IsAutoSeparator() const;

    /**

     * Is this element is a manul separator?

     *

     * @since S60 v3.2

     * @return ETrue if element is a manul separator; otherwise EFalse

     */

    inline TBool IsManualSeparator() const;

    /**

     * Is this element is a tone mark?

     *

     * @since S60 v3.2

     * @return ETrue if element is a tone mark; otherwise EFalse

     */

    inline TBool IsTonemark() const;

    /**

     * Is this element is a auxilian(separator or tone mark)

     *

     * @since S60 v3.2

     * @return ETrue if element is a manul separator; otherwise EFalse

     */

    inline TBool IsAuxilian() const;

    /**

     * Is this element is visible?

     *

     * @since S60 v3.2

     * @return ETrue if element is visible; otherwise EFalse

     */

    inline TBool IsVisible();

    /**

     * Show/hide the element

     *

     * @since S60 v3.2

     * @param aHide Hide flag,

     * @return None

     */

    inline void Hide(TBool aHide);

    /**

     * Get the CCompositionElement pointer of original input

     *

     * @since S60 v3.2

     * @return The length of original input

     */

    virtual const CCompositionElement* OriginalContent( TInt aIndex ) const;

protected:

    /**

     * C++ constructor

     *

     * @since S60 v3.2

     * @return None

     */            

    CCompositionElement(TInt aKeyType);

    /**

     * 2nd constructor

     *

     * @since S60 v3.2

     * @param aKey Input key

     * @return None

     */            

    void BaseConstructL(const TDesC& aKey);

private:  //data

    /**

     * The key type

     */

    const TInt iKeyType;

    /**

     * The key (Own)

     * The iKey->Length() must be > 0 

     */

    HBufC* iKey;

    TBool iHide; 

    };

/**

 *  CCompositionConvertedElement.

 *

 *  @lib peninputvkbcn.lib

 *  @since S60 v3.2 

 */

class CCompositionConvertedElement: public CCompositionElement

    {

public:

    /**

     * Symbian constructor.

     *

     * @since S60 v3.2

     * @param aKey Input key

     * @return Pointer to created CCompositionElement object

     */

    static CCompositionConvertedElement* NewLC(const TDesC& aKey);    

    /**

     * destructor

     *

     * @since S60 v3.2

     * @return None

     */

    virtual ~CCompositionConvertedElement();

    /**

     * Append a element to this converted element

     *

     * @since S60 v3.2

     * @param aElement The element to append

     * @return None

     */

    void AppendOriginal(const CCompositionElement* aElement);

// from CCompositionElement

    /**

     * From CCompositionElement

     * Undo convert

     *

     * @since S60 v3.2

     * @param aField The owner of unconverted components

     * @param aStartPos The insert position

     * @return Inserted elements count

     */

    TInt UndoConvertL(CAknFepVkbCompositionField* aField, TInt aStartPos);

    /**

     * From CCompositionElement

     * Get the length of original input

     *

     * @since S60 v3.2

     * @return The length of original input

     */

    TInt OriginalCount() const;

    /**

     * From CCompositionElement

     * Get the CCompositionElement pointer of original input

     *

     * @since S60 v3.2

     * @return The length of original input

     */

    virtual const CCompositionElement* OriginalContent( TInt aIndex ) const;

private:

    /**

     * C++ constructor

     *

     * @since S60 v3.2

     * @return None

     */            

    CCompositionConvertedElement();

    /**

     * 2nd constructor

     *

     * @since S60 v3.2

     * @param aKey Input key

     * @return None

     */            

    void ConstructL(const TDesC& aKey);

private:  //data

    /**

     * Original elements before converted

     */

    RPointerArray<CCompositionElement> iOriginalElements;

    };

/**

 *  CAknFepVkbCompositionField.

 *

 *  @lib peninputvkbcn.lib

 *  @since S60 v3.2 

 */

class CAknFepVkbCompositionField: public CFepLayoutEditAreaBase

    {

public:

    friend class CCompositionConvertedElement;

    /**

     * Symbian constructor.

     *

     * @since S60 v3.2

     * @param aMaxLength Length limitation, 0 means no limitation

     * @param aRect  The control rect

     * @param aUiLayout The layout

     * @param aControlId The control id.

     * @return Pointer to created CAknFepVkbCompositionField object

     */

    static CAknFepVkbCompositionField* NewL(TInt aMaxLength,

                                            TRect aRect,

                                            CFepUiLayout* aUiLayout,

                                            TInt aControlId,

                                            MAknFepVkbDataProvider* aDataProvider);    

    /**

     * destructor

     *

     * @since S60 v3.2

     * @return None

     */

    virtual ~CAknFepVkbCompositionField();

    /**

     * HandleControlEvent

     *

     * @since S60 v3.2

     * @param aEventType The event type

     * @param aCtrl  The sender

     * @param aEventData The event data.

     * @return None

     */

    void HandleControlEvent(TInt aEventType, CFepUiBaseCtrl* aCtrl, const TDesC& aEventData);

    /**

     * Get the length of current string in composition field

     *

     * @since S60 v3.2

     * @return The length of current string in composition field

     */

    TInt Length() const ;  

    /**

     * Set warning color

     *

     * @since S60 v3.2

     * @param aColor The color.

     * @return None

     */

    void SetWarningColor(const TRgb& aColor);

    /**

     * Set normal color

     *

     * @since S60 v3.2

     * @param aColor The color.

     * @return None

     */

    void SetNormalColor(const TRgb& aColor); 

    /**

     * Is there need to create new word

     *

     * @since S60 v3.2

     * @return ETrue if there is need to create new word, otherwise EFalse

     */

    TBool NeedCreateWord();

     /**

     * Return the spell for new created words.

     *

     * @since S60 v3.2

     * @return The buffer for the gernated spell.

     */ 

    TPtrC GetCreatedWordSpell();

     /**

     * Return whether the inputted spell is invalid

     *

     * @since S60 v3.2

     * @return Return whether the inputted spell is invalid.

     */ 

    TBool IsValidSpell();

	void ConstructFromResourceL();

	void SizeChanged(TRect aRect);	

private:

    /**

     * C++ constructor

     *

     * @since S60 v3.2

     * @param aMaxLength Length limitation, 0 means no limitation

     * @param aRect  The control rect

     * @param aUiLayout The layout

     * @param aControlId The control id.

     * @return None

     */            

    CAknFepVkbCompositionField(TInt aMaxLength,

                              TRect aRect,

                              CFepUiLayout* aUiLayout,

                              TInt aControlId,

                              MAknFepVkbDataProvider* aDataProvider);

    /**

     * Second phase constructor

     *

     * @since S60 v3.2

     * @return None

     */

    void ConstructL();

    /**

     * Insert a key

     *

     * @since S60 v3.2

     * @param aKey The key to insert.

     * @return None

     */

    void HandleInsertL(const TDesC& aKey);

    /**

     * Generate first segment to analysis

     *

     * @since S60 v3.2

     * @return None

     */

    void GetFirstSegmentL();

    /**

     * Insert an element

     *

     * @since S60 v3.2

     * @param aElement The element to insert.

     * @return None

     */

    void InsertElementL(const CCompositionElement* aElement);

    /**

     * clear text

     *

     * @since S60 v3.2

     * @return None

     */

    void ClearTextL();

    /**

     * Handle back key

     *

     * @since S60 v3.2

     * @return None

     */

    void HandleBackL();

    /**

     * Submit all text

     *

     * @since S60 v3.2

     * @return None

     */

    void HandleFlushL();

    /**

     * Handle Analysis Response

     *

     * @since S60 v3.2

     * @param aCompText Analysis result text.

     * @return None

     */

    void HandleAnalysisResponseL(const TDesC& aCompText);

    /**

     * Handle converted result

     *

     * @since S60 v3.2

     * @param aConvertedText Converted result text.

     * @return None

     */

    void HandleConvertedResultL(const TDesC& aConvertedText);

    /**

     * Elements operation: remove

     *

     * @since S60 v3.2

     * @param aStartPos Start position.

     * @param aLength Length.

     * @return None

     */

    void Remove(TInt aStartPos, TInt aLength, TBool aDestroy = ETrue);

    /**

     * Elements operation: insert

     *

     * @since S60 v3.2

     * @param aPos Insert position.

     * @param aElement The element.

     * @return None

     */

    void InsertL(TInt aPos, const CCompositionElement* aElement);

    /**