sl@0: // Copyright (c) 2007-2009 Nokia Corporation and/or its subsidiary(-ies).
sl@0: // All rights reserved.
sl@0: // This component and the accompanying materials are made available
sl@0: // under the terms of "Eclipse Public License v1.0"
sl@0: // which accompanies this distribution, and is available
sl@0: // at the URL "http://www.eclipse.org/legal/epl-v10.html".
sl@0: //
sl@0: // Initial Contributors:
sl@0: // Nokia Corporation - initial contribution.
sl@0: //
sl@0: // Contributors:
sl@0: //
sl@0: // Description:
sl@0: //
sl@0: 
sl@0: #ifndef __WSPLUGINMANAGER_H__
sl@0: #define __WSPLUGINMANAGER_H__
sl@0: 
sl@0: #include <e32base.h>
sl@0: #include "Graphics/WSPLUGIN.H"
sl@0: #include <graphics/wsgraphicdrawerinterface.h>
sl@0: 
sl@0: /**
sl@0: The window server has a single plugin manager object, which maintains the set
sl@0: of loaded plugins.
sl@0: */
sl@0: class CWsPluginManager : public CBase, public MWsPluginManager
sl@0: 	{
sl@0: private:
sl@0: 	class CPluginInfo : public CBase
sl@0: 		{
sl@0: 	public:
sl@0: 		CPluginInfo();
sl@0: 		~CPluginInfo();
sl@0: 		CWsPlugin * iPlugin;
sl@0: 		};
sl@0: public:
sl@0: 	static CWsPluginManager* NewL(MWsGraphicDrawerEnvironment& aEnvironment);
sl@0: 	~CWsPluginManager();
sl@0: 	
sl@0: 	CWsPlugin * CreatePluginL(const TDesC& aSection);
sl@0: 	template <class T> T * FindImplementation(TInt & aStart);
sl@0: 	template <class T> T * FindNamedImplementation(const TDesC& aName);
sl@0: 	
sl@0: public: // from MWsObjectProvider:
sl@0: 	TAny * ResolveObjectInterface(TUint aId);
sl@0: 	
sl@0: public: // from MWsPluginManager
sl@0: 	TAny * ResolvePluginInterface(TUint aId);
sl@0: 
sl@0: private:
sl@0: 	CWsPluginManager(MWsGraphicDrawerEnvironment& aEnvironment);
sl@0: 	void ConstructL();
sl@0: 	
sl@0: private:
sl@0: 	RPointerArray<CPluginInfo> iPlugins;
sl@0: 	MWsGraphicDrawerEnvironment& iEnvironment;
sl@0: 	};
sl@0: 
sl@0: /**
sl@0: This searches for any plugin which implements a specified interface.
sl@0: Calling this function modifies the value of aStart, and passing it back in
sl@0: allows the next implementation to be found.
sl@0: */
sl@0: template <class T> T * CWsPluginManager::FindImplementation(TInt & aStart)
sl@0: 	{
sl@0: 	while (aStart < iPlugins.Count())
sl@0: 		{
sl@0: 		T * impl = iPlugins[aStart]->iPlugin->ObjectInterface<T>();
sl@0: 		++aStart;
sl@0: 		if (impl)
sl@0: 			{
sl@0: 			return impl;
sl@0: 			}
sl@0: 		}
sl@0: 	return NULL;
sl@0: 	}
sl@0: 
sl@0: /**
sl@0: This searches for any plugin which implements a specified interface and
sl@0: has the specified name returned from PluginName.
sl@0: 
sl@0: Maybe plugin name should be a function on an MWsNamed class instead of CWsPlugin?
sl@0: */
sl@0: template <class T> T * CWsPluginManager::FindNamedImplementation(const TDesC& aName)
sl@0: 	{
sl@0: 	TInt pos = 0;
sl@0: 	while (pos < iPlugins.Count())
sl@0: 		{
sl@0: 		T * impl = iPlugins[pos]->iPlugin->ObjectInterface<T>();
sl@0: 		if (impl && iPlugins[pos]->iPlugin->PluginName() == aName)
sl@0: 			{
sl@0: 			return impl;
sl@0: 			}
sl@0: 		++pos;
sl@0: 		}
sl@0: 	return NULL;
sl@0: 	}
sl@0: 
sl@0: #endif // __WSPLUGINMANAGER_H__