1 files changed, 332 insertions, 0 deletions

diff --git a/microkde/kresources/manager.h b/microkde/kresources/manager.h
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@@ -0,0 +1,332 @@
+/*
+    This file is part of libkresources.
+
+    Copyright (c) 2002 Tobias Koenig <tokoe@kde.org>
+    Copyright (c) 2002 Jan-Pascal van Best <janpascal@vanbest.org>
+    Copyright (c) 2003 Cornelius Schumacher <schumacher@kde.org>
+
+    This library is free software; you can redistribute it and/or
+    modify it under the terms of the GNU Library General Public
+    License as published by the Free Software Foundation; either
+    version 2 of the License, or (at your option) any later version.
+
+    This library is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+    Library General Public License for more details.
+
+    You should have received a copy of the GNU Library General Public License
+    along with this library; see the file COPYING.LIB.  If not, write to
+    the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+    Boston, MA 02111-1307, USA.
+*/
+
+#ifndef KRESOURCES_MANAGER_H
+#define KRESOURCES_MANAGER_H
+
+#include <qdict.h>
+#include <qstringlist.h>
+
+#include "factory.h"
+#include "managerimpl.h"
+
+namespace KRES {
+
+class Resource;
+
+template<class T>
+class ManagerListener
+{
+  public:
+    virtual void resourceAdded( T *resource ) = 0;
+    virtual void resourceModified( T *resource ) = 0;
+    virtual void resourceDeleted( T *resource ) = 0;
+};
+
+// TODO:
+// The resource manager should provide some signals
+// to warn applications that resources have been added,
+// removed or modified.
+//
+// The manager should also keep track of which (or at least 
+// how many) applications hve opened a resource, so that it
+// is only closed if none of them is using it any more
+
+template<class T>
+class Manager : private ManagerImplListener
+{
+  public:
+    class Iterator
+    {
+        friend class Manager;
+      public:
+        Iterator() {};
+        Iterator( const Iterator &it ) { mIt = it.mIt; }
+
+        T *operator*() { return static_cast<T *>( *mIt ); }
+        Iterator &operator++() { mIt++; return *this; }
+        Iterator &operator++(int) { mIt++; return *this; }
+        Iterator &operator--() { mIt--; return *this; }
+        Iterator &operator--(int) { mIt--; return *this; }
+        bool operator==( const Iterator &it ) { return mIt == it.mIt; }
+        bool operator!=( const Iterator &it ) { return mIt != it.mIt; }
+
+      private:       
+        Resource::List::Iterator mIt;
+    };
+
+    Iterator begin()
+    {
+      Iterator it;
+      it.mIt = mImpl->resourceList()->begin();
+      return it;
+    }
+  
+    Iterator end()
+    {
+      Iterator it;
+      it.mIt = mImpl->resourceList()->end();
+      return it;
+    }
+
+    class ActiveIterator
+    {
+        friend class Manager;
+      public:
+        ActiveIterator() : mList( 0 ) {};
+        ActiveIterator( const ActiveIterator &it )
+        {
+          mIt = it.mIt;
+          mList = it.mList;
+        }
+
+        T *operator*() { return static_cast<T *>( *mIt ); }
+        ActiveIterator &operator++()
+        {
+          do { mIt++; } while ( checkActive() );
+          return *this;
+        }
+        ActiveIterator &operator++(int)
+        {
+          do { mIt++; } while ( checkActive() );
+          return *this;
+        }
+        ActiveIterator &operator--()
+        {
+          do { mIt--; } while ( checkActive() );
+          return *this;
+        }
+        ActiveIterator &operator--(int)
+        {
+          do { mIt--; } while ( checkActive() );
+          return *this;
+        }
+        bool operator==( const ActiveIterator &it ) { return mIt == it.mIt; }
+        bool operator!=( const ActiveIterator &it ) { return mIt != it.mIt; }
+
+      private:
+        /**
+          Check if iterator needs to be advanced once more.
+        */
+        bool checkActive()
+        {
+          if ( !mList || mIt == mList->end() ) return false;
+          return !(*mIt)->isActive();
+        }
+
+        Resource::List::Iterator mIt;
+        Resource::List *mList;
+    };
+
+    ActiveIterator activeBegin()
+    {
+      ActiveIterator it;
+      it.mIt = mImpl->resourceList()->begin();
+      it.mList = mImpl->resourceList();
+      if ( it.mIt != mImpl->resourceList()->end() ) {
+        if ( !(*it)->isActive() ) it++;
+      }
+      return it;
+    }
+
+    ActiveIterator activeEnd()
+    {
+      ActiveIterator it;
+      it.mIt = mImpl->resourceList()->end();
+      it.mList = mImpl->resourceList();
+      return it;
+    }
+
+    bool isEmpty() const { return mImpl->resourceList()->isEmpty(); }
+
+    Manager( const QString &family )
+    {
+      mFactory = Factory::self( family );
+      // The managerimpl will use the same Factory object as the manager
+      // because of the Factory::self() pattern
+      mImpl = new ManagerImpl( family );
+      mImpl->setListener( this );
+      
+      mListeners = new QPtrList<ManagerListener<T> >;
+    }
+
+    virtual ~Manager()
+    { 
+      mImpl->setListener( 0 );
+      delete mListeners;
+      delete mImpl;
+    }
+
+    /**
+      Recreate Resource objects from configuration file. If cfg is 0, read standard
+      configuration file.
+    */
+    void readConfig( KConfig *cfg = 0 )
+    {
+      mImpl->readConfig( cfg );
+    }
+
+    /**
+      Write configuration of Resource objects to configuration file. If cfg is 0, write
+      to standard configuration file.
+    */
+    void writeConfig( KConfig *cfg = 0 )
+    {
+      mImpl->writeConfig( cfg );
+    }
+
+    /**
+      Add resource to manager. This passes ownership of the Resource object
+      to the manager.
+    */
+    void add( Resource *resource )
+    {
+      if ( resource ) mImpl->add( resource );
+    }
+
+    void remove( Resource *resource )
+    {
+      if ( resource ) mImpl->remove( resource );
+    }
+
+    T* standardResource()
+    {
+      return static_cast<T *>( mImpl->standardResource() );
+    }
+
+    void setStandardResource( T *resource )
+    {
+      if ( resource ) mImpl->setStandardResource( resource );
+    }
+
+    void setActive( Resource *resource, bool active )
+    {
+      if ( resource ) mImpl->setActive( resource, active );
+    }
+
+    /**
+      Returns a list of the names of the reources managed by the
+      Manager for this family.
+    */
+    QStringList resourceNames() const
+    {
+      return mImpl->resourceNames();
+    }
+
+    ConfigWidget *configWidget( const QString& type, QWidget *parent = 0 )
+    {
+      return mFactory->resourceConfigWidget( type, parent );
+    }
+
+    /**
+      Creates a new resource of type @param type, with default 
+      settings. The resource is 
+      not added to the manager, the application has to do that.
+      Returns a pointer to a resource object or a null pointer
+      if resource type doesn't exist.
+     
+      @param type   The type of the resource, one of those returned 
+                    by @ref resourceTypeNames()
+    */
+    T *createResource( const QString& type )
+    {
+      return (T *)( mFactory->resource( type, 0 ) );
+    }
+
+    /**
+      Returns a list of the names of all available resource types.
+    */
+    QStringList resourceTypeNames() const
+    {
+      return mFactory->typeNames();
+    }
+
+    QStringList resourceTypeDescriptions() const
+    {
+      QStringList typeDescs;
+      QStringList types = mFactory->typeNames();
+
+      for ( QStringList::ConstIterator it = types.begin(); it != types.end(); ++it ) {
+        QString desc = mFactory->typeName( *it );
+        if ( !mFactory->typeDescription( *it ).isEmpty() )
+          desc += " (" + mFactory->typeDescription( *it ) + ")";
+
+        typeDescs.append( desc );
+      }
+
+      return typeDescs;
+    }
+
+    void resourceChanged( T *resource )
+    { 
+      mImpl->resourceChanged( resource ); 
+    }
+
+    void addListener( ManagerListener<T> *listener )
+    {
+      mListeners->append( listener );
+    }
+
+    void removeListener( ManagerListener<T> *listener )
+    {
+      mListeners->remove( listener );
+    }
+
+    virtual void resourceAdded( Resource *res )
+    {
+      kdDebug(5650) << "Manager::resourceAdded " << res->resourceName() << endl;
+      T* resource = (T *)( res );
+      ManagerListener<T> *listener;
+      for ( listener = mListeners->first(); listener; listener = mListeners->next() )
+        listener->resourceAdded( resource );
+    }
+
+    virtual void resourceModified( Resource *res )
+    {
+      kdDebug(5650) << "Manager::resourceModified " << res->resourceName() << endl;
+      T* resource = (T *)( res );
+      ManagerListener<T> *listener;
+      for ( listener = mListeners->first(); listener; listener = mListeners->next() )
+        listener->resourceModified( resource );
+    }
+    
+    virtual void resourceDeleted( Resource *res )
+    {
+      kdDebug(5650) << "Manager::resourceDeleted " << res->resourceName() << endl;
+      T* resource = (T *)( res );
+      ManagerListener<T> *listener;
+      for ( listener = mListeners->first(); listener; listener = mListeners->next() ) {
+        kdDebug(5650) << "Notifying a listener to Manager..." << endl;
+        listener->resourceDeleted( resource );
+      }
+    }
+
+  private:
+    ManagerImpl *mImpl;
+    Factory *mFactory;
+    QPtrList<ManagerListener<T> > *mListeners;
+};
+
+}
+
+#endif