// Copyright (c) 2002-2010 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:

//

#ifndef BIDICOMPACT_H_

#define BIDICOMPACT_H_

#include <e32std.h>

#include <bidi.h>

class TRunInfoCompact

/**

Stores information about a run and how to re-order it.

@internalTechnology

*/

	{

public:

	/** Describes text to be re-ordered.

	@internalTechnology */

	class TReorderingContext

		{

	public:

		/** Where the logical-order text starts. */

		const TText* iSource;

		/** The start of the line. */

		TInt iStart;

		/** One past the end of the line. */

		TInt iEnd;

		/**

		 * Truncation character, if there is to be one on this line. Otherwise,

		 * 0xFFFF.

		 */

		TChar iTruncation;

		/** ETrue if the line must join at its beginning. */

		TBool iJoinsAtStart;

		/** ETrue if the line must join at its end. */

		TBool iJoinsAtEnd;

		};

	/** How to re-order the run.

	@internalTechnology */

	enum TTypeFlags

		{

		/** Reverse the run, but not surrogate pairs or combining characters. */

		EFRightToLeft = 0x80000000,

		/** Simply reverse the run, do not check for surrogates or combiners. */

		EFNoPairsNoCombiners = 0x40000000,

		/** No mirrored characters are present. */

		EFNoMirroredCharacters = 0x20000000

		};

	/**	Sets up an empty run.

	@internalTechnology */

	TRunInfoCompact() : iStart(0), iLengthAndType(0) {}

	TRunInfoCompact(TInt aStart, TInt aLength, TBool aReverse,

		const TText* aText);

	TRunInfoCompact(TInt aStart, TInt aLength, TBool aReverse);

	TBool AddRun(const TRunInfoCompact& aToBeAdded);

	TText* Reorder(TText* aDestination, const TReorderingContext& aContext) const;

	/**	@return The start of this run.

	@internalTechnology */

	TInt Start() const { return iStart; }

	/**@return The length of this run.

	@internalTechnology */

	TInt Length() const { return static_cast<TInt>(iLengthAndType & 0x0FFFFFFF); }

	/** @return The flags associated with this run.

	@internalTechnology */

	TInt TypeFlags() const { return iLengthAndType & 0xF0000000; }

	static TInt Convert(TRunInfoCompact* aBuffer, const TDesC& aText,

		const TBidirectionalState::TRunInfo* aRunArray, TInt aArraySize);

	static TBool JoinBefore(const TText* aText, TInt aIndex);

private:

	TInt iStart;

	TUint iLengthAndType;

	};

#endif