1.1 --- /dev/null	Thu Jan 01 00:00:00 1970 +0000
     1.2 +++ b/os/graphics/windowing/windowserver/nga/SERVER/openwfc/wspluginmanager.h	Fri Jun 15 03:10:57 2012 +0200
     1.3 @@ -0,0 +1,102 @@
     1.4 +// Copyright (c) 2007-2009 Nokia Corporation and/or its subsidiary(-ies).
     1.5 +// All rights reserved.
     1.6 +// This component and the accompanying materials are made available
     1.7 +// under the terms of "Eclipse Public License v1.0"
     1.8 +// which accompanies this distribution, and is available
     1.9 +// at the URL "http://www.eclipse.org/legal/epl-v10.html".
    1.10 +//
    1.11 +// Initial Contributors:
    1.12 +// Nokia Corporation - initial contribution.
    1.13 +//
    1.14 +// Contributors:
    1.15 +//
    1.16 +// Description:
    1.17 +//
    1.18 +
    1.19 +#ifndef __WSPLUGINMANAGER_H__
    1.20 +#define __WSPLUGINMANAGER_H__
    1.21 +
    1.22 +#include <e32base.h>
    1.23 +#include "graphics/WSPLUGIN.H"
    1.24 +#include <graphics/WSGRAPHICDRAWERINTERFACE.H>
    1.25 +
    1.26 +/**
    1.27 +The window server has a single plugin manager object, which maintains the set
    1.28 +of loaded plugins.
    1.29 +*/
    1.30 +class CWsPluginManager : public CBase, public MWsPluginManager
    1.31 +	{
    1.32 +private:
    1.33 +	class CPluginInfo : public CBase
    1.34 +		{
    1.35 +	public:
    1.36 +		CPluginInfo();
    1.37 +		~CPluginInfo();
    1.38 +		CWsPlugin * iPlugin;
    1.39 +		};
    1.40 +public:
    1.41 +	static CWsPluginManager* NewL();
    1.42 +	~CWsPluginManager();
    1.43 +	
    1.44 +	void InitializePluginsL(MWsGraphicDrawerEnvironment& aEnvironment);	
    1.45 +	
    1.46 +	template <class T> T * FindImplementation(TInt & aStart);
    1.47 +	template <class T> T * FindNamedImplementation(const TDesC& aName);
    1.48 +	
    1.49 +public: // from MWsObjectProvider:
    1.50 +	TAny * ResolveObjectInterface(TUint aId);
    1.51 +	
    1.52 +public: // from MWsPluginManager
    1.53 +	TAny * ResolvePluginInterface(TUint aId);
    1.54 +
    1.55 +private:
    1.56 +	CWsPluginManager();	
    1.57 +	void ConstructL();
    1.58 +	CWsPlugin * LoadPluginL(const TDesC& aSection);
    1.59 +	
    1.60 +private:
    1.61 +	RPointerArray<CPluginInfo> iPlugins;
    1.62 +	REComSession& iSession;
    1.63 +	};
    1.64 +
    1.65 +/**
    1.66 +This searches for any plugin which implements a specified interface.
    1.67 +Calling this function modifies the value of aStart, and passing it back in
    1.68 +allows the next implementation to be found.
    1.69 +*/
    1.70 +template <class T> T * CWsPluginManager::FindImplementation(TInt & aStart)
    1.71 +	{
    1.72 +	while (aStart < iPlugins.Count())
    1.73 +		{
    1.74 +		T * impl = iPlugins[aStart]->iPlugin->ObjectInterface<T>();
    1.75 +		++aStart;
    1.76 +		if (impl)
    1.77 +			{
    1.78 +			return impl;
    1.79 +			}
    1.80 +		}
    1.81 +	return NULL;
    1.82 +	}
    1.83 +
    1.84 +/**
    1.85 +This searches for any plugin which implements a specified interface and
    1.86 +has the specified name returned from PluginName.
    1.87 +
    1.88 +Maybe plugin name should be a function on an MWsNamed class instead of CWsPlugin?
    1.89 +*/
    1.90 +template <class T> T * CWsPluginManager::FindNamedImplementation(const TDesC& aName)
    1.91 +	{
    1.92 +	TInt pos = 0;
    1.93 +	while (pos < iPlugins.Count())
    1.94 +		{
    1.95 +		T * impl = iPlugins[pos]->iPlugin->ObjectInterface<T>();
    1.96 +		if (impl && iPlugins[pos]->iPlugin->PluginName() == aName)
    1.97 +			{
    1.98 +			return impl;
    1.99 +			}
   1.100 +		++pos;
   1.101 +		}
   1.102 +	return NULL;
   1.103 +	}
   1.104 +
   1.105 +#endif // __WSPLUGINMANAGER_H__