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// Copyright (c) 2007-2009 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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//
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#ifndef __WSPLUGINMANAGER_H__
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#define __WSPLUGINMANAGER_H__
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#include <e32base.h>
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#include "Graphics/WSPLUGIN.H"
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#include <graphics/wsgraphicdrawerinterface.h>
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/**
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The window server has a single plugin manager object, which maintains the set
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of loaded plugins.
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*/
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class CWsPluginManager : public CBase, public MWsPluginManager
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{
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private:
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class CPluginInfo : public CBase
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{
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public:
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CPluginInfo();
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~CPluginInfo();
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CWsPlugin * iPlugin;
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};
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public:
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static CWsPluginManager* NewL(MWsGraphicDrawerEnvironment& aEnvironment);
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~CWsPluginManager();
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CWsPlugin * CreatePluginL(const TDesC& aSection);
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template <class T> T * FindImplementation(TInt & aStart);
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template <class T> T * FindNamedImplementation(const TDesC& aName);
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public: // from MWsObjectProvider:
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TAny * ResolveObjectInterface(TUint aId);
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public: // from MWsPluginManager
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TAny * ResolvePluginInterface(TUint aId);
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private:
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CWsPluginManager(MWsGraphicDrawerEnvironment& aEnvironment);
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void ConstructL();
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private:
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RPointerArray<CPluginInfo> iPlugins;
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MWsGraphicDrawerEnvironment& iEnvironment;
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};
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/**
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This searches for any plugin which implements a specified interface.
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Calling this function modifies the value of aStart, and passing it back in
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allows the next implementation to be found.
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*/
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template <class T> T * CWsPluginManager::FindImplementation(TInt & aStart)
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{
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while (aStart < iPlugins.Count())
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{
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T * impl = iPlugins[aStart]->iPlugin->ObjectInterface<T>();
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++aStart;
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if (impl)
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{
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return impl;
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}
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}
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return NULL;
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}
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/**
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This searches for any plugin which implements a specified interface and
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has the specified name returned from PluginName.
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Maybe plugin name should be a function on an MWsNamed class instead of CWsPlugin?
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*/
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template <class T> T * CWsPluginManager::FindNamedImplementation(const TDesC& aName)
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{
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TInt pos = 0;
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while (pos < iPlugins.Count())
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{
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T * impl = iPlugins[pos]->iPlugin->ObjectInterface<T>();
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if (impl && iPlugins[pos]->iPlugin->PluginName() == aName)
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{
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return impl;
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}
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++pos;
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}
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return NULL;
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}
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#endif // __WSPLUGINMANAGER_H__
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