// textview.h+
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// +
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// Copyright (c) 2009 - 2010 Accenture. All rights reserved.+
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// This component and the accompanying materials are made available+
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// under the terms of the "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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// Accenture - Initial contribution+
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//+
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#ifndef TEXTVIEW_H_+
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#define TEXTVIEW_H_+
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+
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#include <e32base.h>+
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+
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#include "viewbase.h"+
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+
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class CColorConsoleBase;+
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class CFileBuffer;+
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+
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/*+
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 Main parent class for all views able to show any texts on the screen using data read/written from/to the universal+
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 memory buffer CFileBuffer (unicode, left-to-right, right-to-left, up-to-down), etc.+
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*/+
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class CTextView : public CFedViewBase+
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{+
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protected:+
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	CTextView(MConsoleProvider& aConsoleProvider, CFedBufferBase& aBuffer, TInt aPriority = CActive::EPriorityStandard);+
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	void ConstructL();+
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	~CTextView();+
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+
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public:+
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	//CActive+
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	void DoCancel();+
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	void RunL();+
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	TInt RunError(TInt aError);+
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+
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	void ResizeL(const TWindow& aWindow);+
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	void RedrawL(const TWindow& aWindow);+
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	void DeactivateL();+
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+
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	//MSharedCacheClient+
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	void InvalidateBuffer(TRequestStatus& aStatus);+
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+
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	CFedBufferBase& Buffer();+
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+
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protected:+
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	void RequestData(TBool aFromTheTop, TInt aOffset);+
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	void SeekData(TInt aDocumentPosition, TInt aNumLines);+
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	virtual void UpdateCursor(const TPoint& aNewPos);+
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	virtual void ValidateCursor();+
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	void ShowCursor();+
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	void HideCursor();+
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	void HandleDataLoadError(TInt aError);+
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+
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protected:+
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	virtual void DoResizeL(const TWindow& aOldWindow) = 0;+
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	virtual void DoRedrawL() = 0;+
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	virtual void DoDrawL() = 0;+
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+
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private:+
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	enum TState+
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		{+
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		EStateNone,+
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		EStateGetData,+
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		} iState;+
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+
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	//member variables to use by inheriting classes+
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protected:+
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	CFedBufferBase& iBuffer;+
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	TPtrC16 iDes;		// This is set to whatever cache block is currently active	+
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	TBool iActive;		// Whether the view is active and can draw on the screen or not+
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	TPoint iCursor;		// Current position of cursor on the screen (in window coords, NOT console coords)+
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	TPoint iDrawPoint;	// Current position of drawing new characters on the screen (in console coordinates)+
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	RBuf iLine;			// Temp buffer for chars to be drawn on the screen+
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	TRange iRange;		// Document range of last fetched data (iDes)+
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	TInt iRangeStartLineNumber; // Line number for the first character of iRange+
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};+
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+
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#endif /*TEXTVIEW_H_*/+
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