1 // textview.h

     2 // 

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

     4 // This component and the accompanying materials are made available

     5 // under the terms of the "Eclipse Public License v1.0"

     6 // which accompanies this distribution, and is available

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

     8 // 

     9 // Initial Contributors:

    10 // Accenture - Initial contribution

    11 //

    12 #ifndef TEXTVIEW_H_

    13 #define TEXTVIEW_H_

    14 

    15 #include <e32base.h>

    16 

    17 #include "viewbase.h"

    18 

    19 class CColorConsoleBase;

    20 class CFileBuffer;

    21 

    22 /*

    23  Main parent class for all views able to show any texts on the screen using data read/written from/to the universal

    24  memory buffer CFileBuffer (unicode, left-to-right, right-to-left, up-to-down), etc.

    25 */

    26 class CTextView : public CFedViewBase

    27 {

    28 protected:

    29 	CTextView(MConsoleProvider& aConsoleProvider, CFedBufferBase& aBuffer, TInt aPriority = CActive::EPriorityStandard);

    30 	void ConstructL();

    31 	~CTextView();

    32 

    33 public:

    34 	//CActive

    35 	void DoCancel();

    36 	void RunL();

    37 	TInt RunError(TInt aError);

    38 

    39 	void ResizeL(const TWindow& aWindow);

    40 	void RedrawL(const TWindow& aWindow);

    41 	void DeactivateL();

    42 

    43 	//MSharedCacheClient

    44 	void InvalidateBuffer(TRequestStatus& aStatus);

    45 

    46 	CFedBufferBase& Buffer();

    47 

    48 protected:

    49 	void RequestData(TBool aFromTheTop, TInt aOffset);

    50 	void SeekData(TInt aDocumentPosition, TInt aNumLines);

    51 	virtual void UpdateCursor(const TPoint& aNewPos);

    52 	virtual void ValidateCursor();

    53 	void ShowCursor();

    54 	void HideCursor();

    55 	void HandleDataLoadError(TInt aError);

    56 

    57 protected:

    58 	virtual void DoResizeL(const TWindow& aOldWindow) = 0;

    59 	virtual void DoRedrawL() = 0;

    60 	virtual void DoDrawL() = 0;

    61 

    62 private:

    63 	enum TState

    64 		{

    65 		EStateNone,

    66 		EStateGetData,

    67 		} iState;

    68 

    69 	//member variables to use by inheriting classes

    70 protected:

    71 	CFedBufferBase& iBuffer;

    72 	TPtrC16 iDes;		// This is set to whatever cache block is currently active	

    73 	TBool iActive;		// Whether the view is active and can draw on the screen or not

    74 	TPoint iCursor;		// Current position of cursor on the screen (in window coords, NOT console coords)

    75 	TPoint iDrawPoint;	// Current position of drawing new characters on the screen (in console coordinates)

    76 	RBuf iLine;			// Temp buffer for chars to be drawn on the screen

    77 	TRange iRange;		// Document range of last fetched data (iDes)

    78 	TInt iRangeStartLineNumber; // Line number for the first character of iRange

    79 };

    80 

    81 #endif /*TEXTVIEW_H_*/