// Copyright (c) 2008-2009 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:

//

#include <e32base.h>

#include <e32std.h>

#include "inifile.h"

#include "wstop.h"

#include "renderstagemanager.h"

#include "wspluginmanager.h"

#include "Graphics/WsRenderStageFactory.h"

//  Constants

_LIT(KWhiteSpace,									" ");

_LIT(KDefaultRenderStages, 							"flickerbuffer display");

_LIT(KRenderStages,									"RENDERSTAGES");

// Globals

GLREF_D CDebugLogBase *wsDebugLog;

/**

@internalComponent

@prototype

*/

LOCAL_C HBufC* ReverseListLC(const TDesC* aRenderStageList)

	{

	HBufC* writeableCopy = HBufC::NewLC(aRenderStageList->Length());

	TPtr reversedList(writeableCopy->Des());

	TLex lex(*aRenderStageList);

	TBool firstTime = true;

	while (true)

		{

		TPtrC currentPluginString = lex.NextToken();

		if (!currentPluginString.Length())

			{

			break;

			}

		if (firstTime)

			{

			reversedList.Insert(0, currentPluginString);

			firstTime = false;

			}

		else

			{

			reversedList.Insert(0, KWhiteSpace());

			reversedList.Insert(0, currentPluginString);

			}

		}

	return writeableCopy;

	}

/**

@internalComponent

@prototype

*/

LOCAL_C	CWsRenderStage *ConstructRenderStageChain(HBufC* reversedRenderStageList, TInt aScreenNumber, MWsScreen *aScreen, MWsScreenRedraw *aScreenRedraw)

	{

	TInt err = KErrNone;

	CWsPluginManager * pluginMgr = CWsTop::PluginManager();

	if (!pluginMgr)

		{

		RDebug::Printf("ConstructRenderStageChain: Failed to obtain Plugin Manager at File: %s, Line: %d\n", __FILE__, __LINE__);

		return NULL;

		}

	CWsRenderStage* stage;

	CWsRenderStage* savedStage = NULL;

	TBool isLastRenderStage = ETrue;

	TLex lex(*reversedRenderStageList);

	while (true)

		{

		TPtrC ptr = lex.NextToken();

		if (ptr.Length() > 0)

			{

			MWsRenderStageFactory * factory = pluginMgr->FindNamedImplementation<MWsRenderStageFactory>(ptr);

			if (factory)

				{

				if (isLastRenderStage)

					{

					isLastRenderStage = EFalse;

					stage = NULL;

					TRAP(err, stage = factory->CreateFinalRenderStageL(aScreen, aScreenRedraw, aScreenNumber));

					if (err)

						{

						RDebug::Printf("ConstructRenderStageChain: Create final renderstage error at File: %s, Line: %d Error Code: %d\n", __FILE__, __LINE__, err);

						}

					}

				else

					{

					stage = NULL;

					TRAP(err, stage = factory->CreateRenderStageL(aScreen, aScreenRedraw, savedStage));

					if (err)

						{

						RDebug::Printf("ConstructRenderStageChain: Create renderstage error at File: %s, Line: %d Error Code: %d\n", __FILE__, __LINE__, err);

						}

					}

				if (!stage)

					{

					err = KErrNotFound;

					}

				else

					{

					savedStage = stage;

					}

				}

			else

				{

				err = KErrNotFound;

				TBuf<256> buf;

				_LIT(KTxt1, "ConstructRenderStageChain: Factory ");

				buf.Append(KTxt1);

				buf.Append(ptr);

				_LIT(KTxt2, " not found at File: ");

				buf.Append(KTxt2);

#define FILENAME(f)	_LIT(KFileName, f);

				FILENAME(__FILE__);

				buf.Append(KFileName);

				TBuf<32> buf1;

				_LIT(KTxt3," Line: %d Error Code: %d, \n");

				buf1.Format(KTxt3, __LINE__, err);

				buf.Append(buf1);

				RDebug::RawPrint(buf);

				}

			if (err)

				{

				if (wsDebugLog)

					{

					TBuf<64> buf;

					_LIT(KMissingRenderStage,"Failed to add render stage (%d): ");

					buf.Append(KMissingRenderStage);

					buf.Append(ptr);

					wsDebugLog->MiscMessage(CDebugLogBase::ELogImportant,buf,err);

					}

				// This method must fail if *ANY* of the render stages fails during construction

				break;

				}

			else if (wsDebugLog)

				{

				TBuf<64> buf;

				_LIT(KAddedRenderStage,"Added render stage: ");

				buf.Append(KAddedRenderStage);

				buf.Append(ptr);

				wsDebugLog->MiscMessage(CDebugLogBase::ELogImportant,buf);

				}

			}

		else

			{

			break;

			}

		}

	if (err)

		{

		delete savedStage;

		savedStage = NULL;

		}

	return savedStage;

	}

CWsRenderStage *CRenderStageManager::ConnectL(TInt aScreenNumber, MWsScreen *aScreen, MWsScreenRedraw *aScreenRedraw)

	{

	TPtrC stagesString;

	const TDesC *renderStageList;

	const TBool customStages = WsIniFile->FindVar(aScreenNumber, KRenderStages, stagesString);

	if (customStages)

		{

		renderStageList = &stagesString;

		}

	else

		{

		renderStageList = &KDefaultRenderStages();

		}

	LEAVE_LOG_INSTALL_C;

	HBufC* reversedRenderStageList = ReverseListLC(renderStageList);

	CWsRenderStage *firstRenderStage;

	firstRenderStage = ConstructRenderStageChain(reversedRenderStageList, aScreenNumber, aScreen, aScreenRedraw);

	CleanupStack::PopAndDestroy(reversedRenderStageList);

	LEAVE_LOG_UNINSTALL_C;

	return firstRenderStage;

	}

void CRenderStageManager::Release(CWsRenderStage *aRenderStage)

	{

		delete aRenderStage; // this deletes the render stage and its children

	}