/*
* 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 __TXTRICH_H__
#define __TXTRICH_H__

#include <e32std.h>
#include <e32base.h>
#include <txtglobl.h>
#include <txtstyle.h>
#include <mparser.h>
#include <medobsrv.h>

#ifndef SYMBIAN_ENABLE_SPLIT_HEADERS
#include <txtrich_internal.h>
#include <txtclipboard.h>
#endif

// forward references
class CRichTextIndex;
class CStreamStore;
class CStoreMap;
class MPictureFactory;
class MRichTextStoreResolver;
class TCharFormatX;
class TCharFormatXMask;
class CParserData;


class CRichText : public CGlobalText
/** 
Text with rich formatting.

In rich text, each paragraph can have a different paragraph format, and each 
character can have a different character format.

All formatting in a rich text object is based on a global character and 
paragraph format layer, and a chain of layers on which they may be based. In 
case of conflict, upper layers override lower layers. These two format layers 
are specified on construction, and are not owned by the text object. Additional 
formatting may then be added to any portion of the text. This is called specific 
formatting and in case of conflict, it overrides the formatting in the global 
layers. Specific formatting is owned by the text object. So, the effective 
formatting of a rich text object may be composed of specific formatting and 
formatting specified in a chain of format layers.

Rich text supports styles. A style is a named set of paragraph and character 
format attributes. Styles are stored in a list which is passed to the rich 
text object on construction, or which is assigned to the object after 
construction. Styles can be appended to and removed from the list and existing 
styles can be modified. Only paragraph styles are supported. This means that 
styles are applied to entire paragraphs, although both character and paragraph 
format attributes may be set in the style.

Rich text also supports object embedding. Embedded objects are represented 
in rich text by CPicture-derived objects. A rich text object which supports 
the display of pictures needs to be supplied with a picture factory.

@see CParagraphStyle 
@publishedAll
@released
*/
	{
public:
	
	/** Number of paragraphs in the object. */
	enum TParaType 
		{
		/** The text object will contain a single paragraph. */
		ESinglePara, 
		/** The text object will contain multiple paragraphs. */
		EMultiPara
		};
public:
	// Create new rich text component whose sole content is an end-of-document character.	
	IMPORT_C static CRichText* NewL(const CParaFormatLayer* aGlobalParaLayer, const CCharFormatLayer* aGlobalCharLayer,
									TDocumentStorage aStorage = ESegmentedStorage,
									TInt aDefaultTextGranularity = EDefaultTextGranularity,
									TParaType aParaType = EMultiPara);
	// Create new rich text component, supporting STYLES, whose sole content is an end-of-document character.
	IMPORT_C static CRichText* NewL(const CParaFormatLayer* aGlobalParaLayer, const CCharFormatLayer* aGlobalCharLayer,
									const CStyleList& aStyleList,
									TDocumentStorage aStorage = ESegmentedStorage,
									TInt aDefaultTextGranularity = EDefaultTextGranularity,
									TParaType aParaType = EMultiPara);
	// Restore into new rich text, using the specified global layers.
	IMPORT_C static CRichText* NewL(const CStreamStore& aStore, TStreamId aStreamId,
									const CParaFormatLayer* aGlobalParaLayer, const CCharFormatLayer* aGlobalCharLayer,
									MTextFieldFactory* aFieldFactory = NULL,
									TDocumentStorage aStorage = ESegmentedStorage);
	// Restore into new rich text, using the specified layers, store & picture factory.
	IMPORT_C static CRichText* NewL(const CStreamStore& aStore, TStreamId aStreamId,
									const CParaFormatLayer* aGlobalParaLayer, const CCharFormatLayer * aGlobalCharLayer,
									MPictureFactory* aPictureFactory, MRichTextStoreResolver* aStoreResolver,
									MTextFieldFactory* aFieldFactory = NULL,
									TDocumentStorage aStorage = ESegmentedStorage);
	IMPORT_C virtual ~CRichText();
	//
	// Default persist functions - Deferred loading of pictures
	IMPORT_C void RestoreWithStyleListL(const CStreamStore& aStore, TStreamId aStreamId, const CStyleList& aExternalStyleList);
	//
	IMPORT_C virtual void StoreComponentsL(CStreamStore& aStore, CStoreMap& aMap) const;
	IMPORT_C virtual void RestoreComponentsL(const CStreamStore& aStore);
	IMPORT_C virtual void ExternalizeL(RWriteStream& aStream) const;
	IMPORT_C virtual void InternalizeL(RReadStream& aStream);
	//
	// Custom persist functions
	IMPORT_C void ExternalizeStyleDataL(RWriteStream& aStream) const;
	IMPORT_C void InternalizeStyleDataL(RReadStream& aStream);
	//
	IMPORT_C void StoreMarkupComponentsL(CStreamStore& aStore, CStoreMap& aMap) const;
	IMPORT_C void ExternalizeMarkupDataL(RWriteStream& aStream) const;
	IMPORT_C void InternalizeMarkupDataL(RReadStream& aStream);
	//
	// Utility persist functions
	IMPORT_C void SetPictureFactory(MPictureFactory* aPictureFactory, MRichTextStoreResolver* aStoreResolver);
	inline MPictureFactory* PictureFactory() const;
	inline MRichTextStoreResolver* StoreResolver() const;
	IMPORT_C TPictureHeader PictureHeader(TInt aPos) const;
	IMPORT_C void DropPictureOwnership(TInt aPos);		// delete picture character. Forget but don't delete picture.
	IMPORT_C void DetachFromStoreL(CPicture::TDetach aDegree);
	IMPORT_C void DetachFromStoreL(CPicture::TDetach aDegree, TInt aPos, TInt aLength);
	IMPORT_C TBool HasMarkupData() const;
	//
	// Copy/Paste
	IMPORT_C virtual void CopyToStoreL(CStreamStore& aStore, CStreamDictionary& aDictionary, TInt aPos, TInt aLength) const;
	IMPORT_C virtual TInt PasteFromStoreL(const CStreamStore& aStore, const CStreamDictionary& aDictionary, TInt aPos);
	IMPORT_C TInt PasteFromStoreL(const CStreamStore& aStore, const CStreamDictionary& aDictionary, TInt aPos, CParagraphStyle::TStylePasteMode aStylePasteMode);
	//
	// Content modifier functions
	IMPORT_C virtual void Reset();
	IMPORT_C virtual void InsertL(TInt aPos, const TChar& aChar);  // Insert a single character.
	IMPORT_C virtual void InsertL(TInt aPos, const TDesC& aBuf);
	IMPORT_C void InsertL(TInt aPos, const TPictureHeader& aHeader);  // Insert a picture header.
	//
	// aPos is the position of the character being deleted, *not* the current cursor position!
	IMPORT_C virtual TBool DeleteL(TInt aPos, TInt aLength);  // Call this for a delete-forward.
	//
	// Leave-safe delete for removing content from *within* a single paragraph only
	IMPORT_C void DeleteFromParagraph(TInt aPos, TInt aLength);
	//
	// Leave-safe delete for removing *entire* paragraphs
	IMPORT_C void DeleteParagraph(TInt aPos, TInt aLength);
	//
	// Special behaviour format modifier functions.
	// Call this when applying a character format to a zero length selection, eg, turning bold on.
	IMPORT_C void SetInsertCharFormatL(const TCharFormat& aFormat, const TCharFormatMask& aMask, TInt aPos);
	//
	// Call this on every cursor movement, page up/down etc...
	IMPORT_C void CancelInsertCharFormat();
	//
	// Delete content, but preserve phrase format if aPos is at a phrase boundary.
	// aPos is the position of the character being deleted, *not* the current cursor position!
	IMPORT_C TBool DelSetInsertCharFormatL(TInt aPos, TInt aLength);
	//
	// MLaydoc implementation
	IMPORT_C virtual void GetParagraphFormatL(CParaFormat* aFormat, TInt aPos) const;
	IMPORT_C virtual void GetChars(TPtrC& aView, TCharFormat& aFormat, TInt aPos) const;
	IMPORT_C virtual TInt GetPictureSizeInTwips(TSize& aSize, TInt aPos) const;
	IMPORT_C virtual CPicture* PictureHandleL(TInt aPos, MLayDoc::TForcePictureLoad aForceLoad = MLayDoc::EForceLoadTrue) const;
	//
	// MFormatText implementation
	// Used only by dialog writers, since they are not interested in the text, but require knowledge
	// of attributes whose values change across the specified range.
	IMPORT_C virtual void GetParaFormatL(CParaFormat* aFormat, TParaFormatMask& aVaries, TInt aPos, TInt aLength,
										CParaFormat::TParaFormatGetMode aMode = CParaFormat::EAllAttributes) const;
	IMPORT_C virtual void ApplyParaFormatL(const CParaFormat* aFormat, const TParaFormatMask& aMask, TInt aPos, TInt aLength);
	IMPORT_C virtual void GetCharFormat(TCharFormat& aFormat, TCharFormatMask& aVaries, TInt aPos, TInt aLength) const;
	IMPORT_C virtual void ApplyCharFormatL(const TCharFormat& aFormat, const TCharFormatMask& aMask, TInt aPos, TInt aLength);
	//
	//
	IMPORT_C void GetSpecificCharFormat(TCharFormat& aFormat, TCharFormatMask& aMask, TInt aPos) const;
	IMPORT_C void GetSpecificCharFormatRight(TCharFormat& aFormat, TCharFormatMask& aMask, TInt aPos) const;
	IMPORT_C void GetSpecificParagraphFormatL(CParaFormat* aFormat, TParaFormatMask& aMask, TInt aPos) const;
	//
	// Paragraph style implementation
	IMPORT_C void ApplyParagraphStyleL(const CParagraphStyle& aStyle, TInt aPos, TInt aLength, CParagraphStyle::TApplyParaStyleMode aMode);
	inline void NotifyStyleDeletedL(const CParagraphStyle* aStyle);
	IMPORT_C void NotifyStyleChangedL(const CParagraphStyle* aTo, const CParagraphStyle* aFrom);
	IMPORT_C const CParaFormatLayer* ParagraphStyle(TBool& aStyleChangesOverRange, TInt aPos, TInt aLength) const;
	//
	// StyleList implementation
	inline TBool StyleListPresent() const;
	inline CStyleList* StyleList() const;
	inline TInt StyleCount() const;

	inline void SetStyleListExternallyOwned(TBool aExternallyOwned);
	IMPORT_C void SetStyleListExternallyOwned(const CStyleList& aStyleList);
	inline TBool StyleListExternallyOwned() const;
	//
	// Utility functions
	IMPORT_C void RemoveSpecificParaFormatL(TInt aPos, TInt aLength);  
	IMPORT_C void RemoveSpecificCharFormatL(TInt aPos, TInt aLength);
	IMPORT_C TInt PictureCount() const;
	IMPORT_C virtual TInt ParagraphCount() const;
	IMPORT_C virtual TInt CharPosOfParagraph(TInt& aLength, TInt aParaOffset) const;
	IMPORT_C virtual TInt ParagraphNumberForPos(TInt& aPos) const;
	IMPORT_C virtual TEtextComponentInfo ComponentInfo() const;
	//
	// Text field implementation
	IMPORT_C virtual void UpdateFieldL(TInt aPos);  // updates the field at aPos
	// finds number of fields in range. Includes the field containing aPos, if applicable
	// aInfo is set to the first field in the range (if any are found)
	//
	// Speciality functions
	IMPORT_C void AppendTakingSolePictureOwnershipL(const CRichText& aSource);
	IMPORT_C void AppendParagraphL(TInt aReplicas = 1);
	IMPORT_C virtual void SetHasChanged(TBool aHasChanged);
	
	IMPORT_C void ExtendedInterface(TAny*& aInterface, TUid aInterfaceId); // from CEditableText
	
	// non-exported public functions
	void ApplyExtendedCharFormatL(const TCharFormatX& aFormat, const TCharFormatXMask& aMask, TInt aPos, TInt aLength);
	void GetExtendedCharFormat(TCharFormatX& aFormat, TCharFormatXMask& aVaries, TInt aPos, TInt aLength) const;
	void GetTextAndExtendedFormat(TPtrC& aText, TCharFormatX& aFormat, TInt aPos) const;

private:
	CRichText(const CRichText& aRichText);
	CRichText& operator=(const CRichText& aRichText);
	void KillStyleList();
	void KillIndex();
	TBool CreateEmptyMarkupComponentL();
	void CreateAndGenerateMarkupComponentL();
	void GenerateMarkupL();
	void CompletePastePlainTextL(TInt aPos,TInt aCharacterCount);
	TInt DoPasteRtFromStoreL(const CStreamStore& aStore, const CStreamDictionary& aDictionary, TInt aPos, CParagraphStyle::TStylePasteMode aStylePasteMode);
	TBool IndexPresent() const;
	inline void SetParaTypeIsSingle(TBool aBool);
	inline TBool ParaTypeIsSingle() const;
	void SetExtendedInsertCharFormatL(const TCharFormatX& aFormat, const TCharFormatXMask& aMask, TInt aPos);
	void GetSpecificCharFormatLeftRight(TCharFormat& aFormat,
		TCharFormatMask& aMask, TInt aPos, TBool aLeft) const;
	void DoApplyExtendedCharFormatL(const TCharFormatX& aFormat,const TCharFormatXMask& aMask,TInt aPos,TInt aLength);		

protected:
	IMPORT_C CRichText(const CParaFormatLayer* aGlobalParaLayer, const CCharFormatLayer* aGlobalCharLayer,
					   CStyleList* aStyleList = NULL);
	// New constructL's - to be merged post 057
	IMPORT_C void ConstructL(TDocumentStorage aStorage, TInt aDefaultTextGranularity, TParaType aParaType);
	IMPORT_C void ConstructL(const CStreamStore& aStore, TStreamId aStreamId, MPictureFactory* aFactory, MRichTextStoreResolver* aStoreResolver,
							 MTextFieldFactory* aFieldFactory=NULL,
							 TDocumentStorage aStorage = ESegmentedStorage);
	//
	void InternalizeL(RReadStream& aStream, const CStyleList* aExternalStyleList);
	IMPORT_C void DoExternalizeStyleDataL(RWriteStream& aStream) const;
	IMPORT_C void DoInternalizeStyleDataL(RReadStream& aStream);
	void DoInternalizeStyleDataL(RReadStream& aStream, const CStyleList* aExternalStyleList);
	IMPORT_C void DoExternalizeMarkupDataL(RWriteStream& aStream) const;
	IMPORT_C void DoInternalizeMarkupDataL(RReadStream& aStream);
	void StoreStylesL(CStreamStore& aStore,CStoreMap& aMap) const;
	void RestoreStylesL(const CStreamStore& aStore, TStreamId aId, const CParaFormatLayer* aParaFormatLayer, const CCharFormatLayer* aCharFormatLayer);
	void StoreMarkupL(CStreamStore& aStore,CStoreMap& aMap)const;
	//
	IMPORT_C void RtInsertL(TInt aPos,const TDesC& aBuf);
	//
	TStreamId DoCopyToStoreL(CStreamStore& aStore, TInt aPos, TInt aLength, TStreamId aGlobalTextId, TBool aCopyStyles) const;
	IMPORT_C void CopyComponentsL(CStreamStore& aStore, CStoreMap& aMap, TInt aPos,TInt aLength, TStreamId aGlobalTextId) const;
	IMPORT_C void CopyToStreamL(RWriteStream& aStream, TInt aPos, TInt aLength, TStreamId aGlobalTextId) const;
	IMPORT_C void CopyToStreamL(RWriteStream& aStream, TInt aPos, TInt aLength) const;
	void CopyToStreamL(RWriteStream& aStream, TInt aPos, TInt aLength, TStreamId aGlobalTextId, TBool aCopyStyles) const;
	TInt PasteRichTextFromStoreL(const CStreamStore& aStore, const CStreamDictionary& aDictionary, TStreamId& anId, TInt aPos, CParagraphStyle::TStylePasteMode aStylePasteMode);
	void CompletePasteRichTextFromStoreL(const CStreamStore& aStore, TStreamId& aRichTextStreamId, TInt aPos, CParagraphStyle::TStylePasteMode aStylePasteMode);
	TInt PastePlainTextFromStoreL(const CStreamStore& aStore, TStreamId& anId, TInt aPos);
	//
	// Append
	void PrepareAppendMarkupL(const CRichText& aSource);
	void DoAppendTakingSolePictureOwnershipL(const CRichText& aSource);
public:
	IMPORT_C static void ActivateParserL(MParser* aParser);		// Switch on a particular parser
	IMPORT_C static void DeactivateParser(MParser* aParser);	// Switch off a particular parser
	IMPORT_C static void ActivateDefaultParserL(MParser* aParser);	// Switch on a default parser
	IMPORT_C static void DeactivateParserDefaults();				// Switch off default set (if any)
																// and delete EText TLS

	IMPORT_C void SetEditObserver(MEditObserver* aEditObserver);
	IMPORT_C TBool ParseText(TInt& aStartOfTags, TInt& aLength, TBool aForceScanAllText);
	IMPORT_C TBool CursorOverTag(TInt aPos, MParser*& aParser, TInt& aTagStart, TInt& aLength) const;
	// Next tag (forwards), any or specific parser
	IMPORT_C TInt PositionOfNextTag(TInt aPos) const;
	IMPORT_C TInt PositionOfNextTag(TInt aPos, const MParser* aParser) const;
	// Prev tag (backwards), any or specific parser
	IMPORT_C TInt PositionOfPrevTag(TInt aPos) const;
	IMPORT_C TInt PositionOfPrevTag(TInt aPos, const MParser* aParser) const;

private:
	static void CreateParserETextTLSL();
	TBool DoCursorOverTag(TInt aPos, MParser*& aParser, TInt& aTagStart, TInt& aLength) const;
	void OverrideFormatForParsersIfApplicable(TPtrC& aText, TCharFormatX& aFormat, TInt aStartPos) const;
	void CallEditObserver(TInt aStart, TInt aExtent) const;

protected:
	enum {EDelimiterCharacterLength = 1};
private:
	TSwizzle<CStyleList> iStyleList;
	TSwizzle<CRichTextIndex> iIndex;
	TUint32 iFlags;
	MPictureFactory* iPictureFactory;
	MRichTextStoreResolver* iStoreResolver;

	CParserData* iParserData;

	void* iReserved_3;

	__DECLARE_TEST;  // Index consistency check with document length.
	};


#include <txtrich.inl>


#endif