/*

* Copyright (c) 1997-2009 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: 

*

*/

#ifndef __FRMVIS_H__

#define __FRMVIS_H__

#include <e32std.h>

#include <e32base.h>

class RReadStream;

class RWriteStream;

/** 

A set of flags to indicate which non-printing characters (e.g. space, tab,

paragraph break, etc.) should be drawn using symbols. By default, all

non-printing characters are hidden.

An instance of this class is used in

CTextLayout::SetNonPrintingCharsVisibility().

@publishedAll

@released

*/

class TNonPrintingCharVisibility

	{

private:

	enum TShowFormatChars

		{

		EFNothingVisible=0x000,

		EFTabsVisible=0x001,

		EFSpacesVisible=0x002,

		EFParagraphDelimitersVisible=0x004,

		EFLineBreaksVisible=0x008,

		EFPotentialHyphensVisible=0x010,

		EFNonBreakingHyphensVisible=0x020,

		EFNonBreakingSpacesVisible=0x040,

		EFPageBreaksVisible=0x080,

		EFEverythingVisible=0xffffffff

		};

public:

	IMPORT_C TNonPrintingCharVisibility();

	IMPORT_C TNonPrintingCharVisibility(const TNonPrintingCharVisibility& aVisibility);

	IMPORT_C TNonPrintingCharVisibility& operator=(const TNonPrintingCharVisibility& aVisibility);

	IMPORT_C void ExternalizeL(RWriteStream& aStream)const;

	IMPORT_C void InternalizeL(RReadStream& aStream);

	IMPORT_C void SetAllVisible();

	IMPORT_C void SetNoneVisible();

	IMPORT_C void SetTabsVisible(TBool aVisible);

	IMPORT_C void SetSpacesVisible(TBool aVisible);

	IMPORT_C void SetParagraphDelimitersVisible(TBool aVisible);

	IMPORT_C void SetLineBreaksVisible(TBool aVisible);

	IMPORT_C void SetPotentialHyphensVisible(TBool aVisible);

	IMPORT_C void SetNonBreakingHyphensVisible(TBool aVisible);

	IMPORT_C void SetNonBreakingSpacesVisible(TBool aVisible);

	IMPORT_C void SetPageBreaksVisible(TBool aVisible);

	/** Tests whether all non-printing characters are visible.

	@return ETrue if all non-printing characters are visible. EFalse if any or

	all hidden. */

	inline TBool AllVisible()const{return iVisible==EFEverythingVisible;};

	/** Tests whether all non-printing characters are hidden.

	@return ETrue if all non-printing characters are hidden. EFalse if any are

	visible. */

	inline TBool NoneVisible()const{return iVisible==EFNothingVisible;};

	/** Tests whether tab stop characters are visible.

	@return ETrue if tab stop characters are visible. EFalse if hidden. */

	inline TBool TabsVisible()const{return iVisible&EFTabsVisible;};

	/** Tests whether space characters are visible.

	Note: To get the the visibility of non-breaking space characters, use

	NonBreakingSpacesVisible() instead.

	@return ETrue if space characters are visible. EFalse if hidden. */

	inline TBool SpacesVisible()const{return iVisible&EFSpacesVisible;};

	/** Tests whether paragraph delimiters are visible.

	@return ETrue if paragraph delimiters are visible. EFalse if hidden. */

	inline TBool ParagraphDelimitersVisible()const{return iVisible&EFParagraphDelimitersVisible;};

	/** Tests whether forced line break characters are visible.

	@return ETrue if forced line break characters are visible. EFalse if hidden.

	*/

	inline TBool LineBreaksVisible()const{return iVisible&EFLineBreaksVisible;};

	/** Tests whether potential hyphen characters (inserted before a line break

	within a word) are visible.

	@return ETrue if potential hyphen characters are visible. EFalse if hidden.

	*/

	inline TBool PotentialHyphensVisible()const{return iVisible&EFPotentialHyphensVisible;};

	/** Tests whether non-breaking hyphens (enclosing word is always kept on

	the same line) are visible.

	@return ETrue if non-breaking hyphens are visible. EFalse if hidden. */

	inline TBool NonBreakingHyphensVisible()const{return iVisible&EFNonBreakingHyphensVisible;};

	/** Tests whether non-breaking spaces are visible.

	@return ETrue if non-breaking spaces are visible. EFalse if hidden. */

	inline TBool NonBreakingSpacesVisible()const{return iVisible&EFNonBreakingSpacesVisible;};

	/** Tests whether page break characters are visible.

	@return ETrue if page break characters are visible. EFalse if hidden. */

	inline TBool PageBreaksVisible()const{return iVisible&EFPageBreaksVisible;};

private:

	TUint32 iVisible;

	};

#endif