/*

* Copyright (c) 2007-2009 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: 

* This wraps the ICU layout Engine in a CBase class

* and maps the Symbian structures to ICU structures

*

*/

#ifndef __CICULAYOUTENGINE_H__

#define __CICULAYOUTENGINE_H__

// System includes

#include <e32base.h>

#include <openfont.h>

#include <shapeinfo.h>

#include <graphics/shapeimpl.h>

#include "ScriptAndLanguageTags.h"

class SymbianFontInstance;

// if ICU headers not used define

#ifndef U_NAMESPACE_USE

class LayoutEngine;

#endif

/**

Encapsulates the ICU Layout Engine in a CShaper class

and maps the Symbian objects to ICU objects

@internalTechnology 

*/

class CIcuLayoutEngine : public CShaper

	{

public:

	static CShaper* NewL(CBitmapFont* aBitmapFont, TInt aScript, TInt aLanguage, RHeap* aHeap);

	~CIcuLayoutEngine();

	virtual TInt ShapeText(TShapeHeader*& aOutput, const TInput& aInput, RHeap* aHeapForOutput);

	virtual void* ExtendedInterface (TUid aInterfaceId);

private:

	CIcuLayoutEngine(TUint32 aScript, TUint32 aLanguage);

	TInt  ConstructL(CBitmapFont*, TInt aScript, TInt aLanguage, RHeap* iHeap);

	// leaving version of shaping method

	void  IcuShapeTextL(TShapeHeader*& aOutput, const TInput& aInput, RHeap* aHeapForOutput);

	// the client heap pointer passed in during construction

	RHeap* iClientHeap;

	// Open source Icu layout engine

	LayoutEngine* iEngine;	 

	// Symbian font data

	SymbianFontInstance* iFontInstance;

	// The script which this shaper will shape

	TUint32 iScript;

	//The language which this shaper will shape

	TUint32 iLanguage;

	};

#endif