// lrtextview.h

// 

// Copyright (c) 2009 - 2010 Accenture. All rights reserved.

// This component and the accompanying materials are made available

// under the terms of the "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:

// Accenture - Initial contribution

//

#ifndef LRTEXTVIEW_H_

#define LRTEXTVIEW_H_

#include "textview.h"

class CColorConsoleBase;

class CLineData;

//Main class reading/writing normal (not-unicode) text arranged left-to-right on the screen.

class CLRTextView : public CTextView

{

public:

	static CLRTextView* NewL(MConsoleProvider& aConsoleProvider, CFedBufferBase& aBuffer);

	~CLRTextView();

protected:

	CLRTextView(MConsoleProvider& aConsoleProvider, CFedBufferBase& aBuffer);

	void ConstructL();

public:

	//MDeferredClose

	TBool TryCloseL();

	//MKeyConsumer

	TBool ConsumeKeyL(const TKeyCode& aCode);

	//CTextView

	void DoResizeL(const TWindow& aOldWindow);

	void DoRedrawL();

	void DoDrawL();

protected:

	void ValidateCursor();

	void UpdateCursor(const TPoint& aNewPos);

	void HandleControlChar();

	void AppendChar(TUint16 aChar);

	void WriteLine();

	void WriteChars();

	void GoToNextLine();

	void WriteLineContinue();

	void LineFinished();

	TInt DocumentPosition() const;

	void MoveCursor(TInt aX, TInt aY);

	void InsertTextL(const TDesC& aText);

	void DeleteTextL(TInt aNumChars);

	void DeleteCurrentLineL();

	void UpdateStatus();

	TInt Save();

	TInt SaveAs();

	void HandleSaveResult(TInt aError, TBool aWasOpen, const TDesC& aName);

	void GoToLine();

	void GoToLine(TInt aLine);

	void DoDrawL(TBool aUpdateCursorAndStatus); // Occasionally we want to do a draw without updating

	void CenterDocPosOnScreen(TInt aDocumentPosition);

	TPoint WindowLocationForDocumentPosition(TInt aDocPos) const; // Assuming the doc pos is on screen in an area that's been drawn

	void RedrawFromPositionToEndOfLine(TInt aDocumentPosition, TInt aNumCharsInserted);

	void Find();

	void CopyOrCutL(TBool aCut);

	void PasteL();

	void CopyToClipboardL(const TDesC& aBuf);

	HBufC* GetFromClipboardL();

	void SetMark();

	void CancelMark();

	static TInt FlashMark(TAny* aSelf);

	void DoFlashMark();

	TBool MarkActive() const;

	void UpdateDocumentPositionsStartingAtLine(TInt aLine, TInt aDelta);

private:

	CLineData* iLineData;

	TInt iCurrentDrawDocIndex; // Used while drawing to construct iLineData document positions, has no meaning outside of there

	TBool iLineIsErrorMessage;

	TBuf<256> iFindText;

	CPeriodic* iMarkFlasher;

	TInt iMarkDocPos;

	TBool iMarkShown;

	TInt iOldNextLine; // Used to limit how much redrawing we need to do

	TInt iOldNextLineDocPos; // Ditto

	TInt iPredictedOldNextLineDocPosDelta; // Ditto

	TBool* iRecursiveUpdateFlag; // For times when DoDrawL's aUpdateStatusAndCursor flag needs tracking through calls to RequestData

};

class CLineData : public CBase

	{

public:

	void EnsureCapacityL(TInt aWidth, TInt aHeight);

	TInt DocumentPosition(TInt aLine) const;

	TInt FileLineNumber(TInt aLine) const;

	TBool IsScreenPositionValid(TInt aLine, TInt aCol) const;

	TInt LastValidPosition(TInt aLine) const;

	void SetDocumentPositionForLine(TInt aLine, TInt aDocumentPosition);

	void SetFileLineNumberForLine(TInt aLine, TInt aDocumentPosition);

	void SetPositionIsValid(TInt aLine, TInt aCol, TBool aValid);

	void LineFinishedAt(TInt aLine, TInt aCol);

	~CLineData();

private:

	const TUint8& ByteForPos(TInt aLine, TInt aCol, TInt& aOffset) const;

	TUint8& ByteForPos(TInt aLine, TInt aCol, TInt& aOffset);

private:

	TInt iLineLen;

	TInt* iDocPosAndLine;

	TUint8* iScreenIndexes;

	};

#endif /*LRTEXTVIEW_H_*/