// Copyright (c) 2003-2009 Nokia Corporation and/or its subsidiary(-ies).+
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// All rights reserved.+
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// This component and the accompanying materials are made available+
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// under the terms of "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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// Nokia Corporation - initial contribution.+
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//+
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// Contributors:+
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//+
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// Description:+
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// For manipulting of received data+
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// +
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//+
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+
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/**+
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 @file schat.cpp +
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*/+
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+
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#include "SCHAT.H"+
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#include "ND_STD.H"+
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+
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//+
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// CCommChatter definitions+
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//+
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+
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CCommChatter* CCommChatter::NewL(MCommChatNotify* aNotify,TInt aPriority,TInt aBufferSize)+
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/**+
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2 phased constructor for CCommChatter, first phase.+
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+
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@param aNotify a pointer to chat notifier.+
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@param aPriority is priority for this timer.+
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@param aBufferSize is buffer size for this object.+
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@exception Leaves if ConstructL() leaves, or not enough memory is available.+
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@return a new CCommChatter object.+
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*/+
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	{+
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	CCommChatter* cc=new(ELeave) CCommChatter(aNotify,aPriority);+
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	CleanupStack::PushL(cc);+
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	cc->ConstructL(aBufferSize);+
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	CleanupStack::Pop();+
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	return cc;+
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	}+
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+
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CCommChatter::CCommChatter(MCommChatNotify* aNotify, TInt aPriority)+
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	: CTimer(aPriority), iNotify(aNotify)+
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/**+
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Private constructor for CCommChatter, used in the first phase of construction.+
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+
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@param aNotify a pointer to chat notifier.+
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@param aPriority is priority for this timer.+
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*/+
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	{+
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	CActiveScheduler::Add(this);+
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	iList.SetOffset(_FOFF(CCommChatString,iLink));+
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	}+
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+
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void CCommChatter::ConstructL(TInt aBufSize)+
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/**+
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Instantiates member variables.+
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+
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@param aBufSize is buffer size for this object.+
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@exception Leaves if CTimer::ConstructL() or User::AllocL() leaves.+
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*/+
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	{+
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	CTimer::ConstructL();+
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	iBuffer=(TText8*)User::AllocL(aBufSize);+
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	iBufferEnd=(iBuffer+aBufSize)-1;+
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	ClearHistory();+
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	}+
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+
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CCommChatter::~CCommChatter()+
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/**+
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Destructor.+
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Frees iBuffer's allocated memory.+
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*/+
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	{+
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	User::Free(iBuffer);+
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	}+
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+
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void CCommChatter::ClearHistory()+
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/**+
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Empties history.+
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*/+
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	{+
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	iLastChar=iBuffer;+
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	iCount=0;+
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	}+
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+
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void CCommChatter::AddChar(TText8 aChar)+
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/**+
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Adds a character to the history buffer.+
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Scan all strings to find any matches that may be completed.+
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*/+
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	{+
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	if (++iLastChar>iBufferEnd)+
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		iLastChar=iBuffer;+
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	*iLastChar=aChar;+
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	++iCount;+
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+
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	TText8 fchar=(TText8)User::Fold(aChar);+
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+
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	// Scan for matching last character	+
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	CCommChatString* cs;+
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	TDblQueIter<CCommChatString> iter(iList);+
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	TInt index=0;+
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+
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	while (cs=iter++, cs!=NULL)+
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		{+
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		if (cs->IsFolded()+
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			? (cs->LastChar()==fchar && MatchF(cs))+
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			: (cs->LastChar()==aChar && Match(cs)) )+
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			{+
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			iNotify->ChatStringMatch(index);+
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			cs=iter;	// In case user removed cs;+
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			}+
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		index++;+
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		}+
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	}+
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+
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TBool CCommChatter::Match(const CCommChatString* aString) const+
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/**+
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Matches a chat string against the history buffer (Case sensitive).+
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*/+
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	{+
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	__ASSERT_ALWAYS(aString!=NULL, NetDialPanic(ENullCommChatString));+
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+
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	const TText8* s=aString->Ptr();+
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	const TText8* sp=aString->EndPtr();+
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	const TText8* bp=iLastChar;+
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+
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	if (iCount<aString->Length())+
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		return EFalse;+
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+
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	while (*bp==*sp && sp>=s)+
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		{+
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		--sp;+
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		if (--bp<iBuffer)+
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			bp=iBufferEnd;+
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		}+
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+
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	return sp<s;+
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	}+
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+
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TBool CCommChatter::MatchF(const CCommChatString* aString) const+
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/**+
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Matches a folded chat string against the history buffer (Case insensitive).+
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*/+
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	{+
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	__ASSERT_ALWAYS(aString!=NULL, NetDialPanic(ENullCommChatString));+
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+
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	const TText8* s=aString->Ptr();+
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	const TText8* sp=aString->EndPtr();+
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	const TText8* bp=iLastChar;+
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+
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	if (iCount<aString->Length())+
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		return EFalse;+
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+
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	while (User::Fold(*bp)==*sp && sp>=s)+
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		{+
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		--sp;+
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		if (--bp<iBuffer)+
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			bp=iBufferEnd;+
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		}+
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+
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	return sp<s;+
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	}+
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+
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void CCommChatter::RunL()+
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/**+
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Timer completed.+
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*/+
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	{+
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	iNotify->ChatTimeout();+
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	}+
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+
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void CCommChatter::AddString(CCommChatString* aString)+
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/**+
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Adds a string to the list.+
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*/+
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	{+
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	__ASSERT_ALWAYS(aString!=NULL, NetDialPanic(ENullCommChatString));+
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	iList.AddLast(*aString);+
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	}+
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+
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void CCommChatter::RemoveString(CCommChatString* aString)+
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/**+
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Removes a string from the list.+
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*/+
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	{+
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	__ASSERT_ALWAYS(aString!=NULL, NetDialPanic(ENullCommChatString));+
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	aString->iLink.Deque();+
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	}+
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+
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void CCommChatter::DeleteAllAndStop()+
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/**+
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Removes all strings from the list.+
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*/+
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	{+
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	StopTimer();+
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	CCommChatString* cs;+
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	while (!iList.IsEmpty())+
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		{+
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		cs=iList.First();+
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		RemoveString(cs);+
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		delete cs;+
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		}+
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	}+
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+
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void CCommChatter::StartTimer(const TTimeIntervalMicroSeconds32& aTimeout)+
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/**+
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Starts timer.+
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*/+
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	{+
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	+
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	if (IsActive())+
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		Cancel();+
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	After(aTimeout);+
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	}+
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+
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void CCommChatter::StopTimer()+
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/**+
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Stops timer.+
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*/+
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	{+
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	Cancel();+
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	}+
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+
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//+
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// CCommChatString definitions+
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//+
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+
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CCommChatString* CCommChatString::NewL(const TDesC8& aDes,TBool aIsFolded)+
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/**+
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2 phased constructor for CCommChatString, first phase.+
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+
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@param aDes a pointer to chat notifier.+
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@param aIsFolded is buffer size for this object.+
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@exception Leaves if ConstructL() leaves, or not enough memory is available.+
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@return a new CCommChatString object.+
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*/+
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	{+
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	CCommChatString* cs=new (ELeave) CCommChatString;+
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	CleanupStack::PushL(cs);+
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	cs->ConstructL(aDes,aIsFolded);+
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	CleanupStack::Pop();+
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	return cs;+
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	}+
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+
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CCommChatString::CCommChatString()+
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/**+
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Private constructor for CCommChatString, used in the first phase of construction.+
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*/+
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	{}+
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+
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void CCommChatString::ConstructL(const TDesC8& aDes,TBool aIsFolded)+
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/**+
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Instantiates member variables.+
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*/+
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	{+
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	__ASSERT_ALWAYS(aDes.Length()>0, NetDialPanic(ENullCommChatString));+
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	iIsFolded=aIsFolded;+
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	iString=(TText8*)User::AllocL(aDes.Length());+
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	iLastChar=(iString+aDes.Length())-1;+
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	Mem::Copy(iString, (TText8*)aDes.Ptr(), aDes.Length());+
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	}+
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+
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CCommChatString::~CCommChatString()+
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/**+
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Destructor.+
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Deletes allocations/objects.+
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*/+
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	{+
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	User::Free(iString);+
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	}+
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