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     2 **

     3 ** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).

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     7 ** This file is part of the Qt Mobility Components.

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    16 ** GNU Lesser General Public License Usage

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    18 ** General Public License version 2.1 as published by the Free Software

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    40 ****************************************************************************/

    41 

    42 #ifndef GCONFLAYER_H

    43 #define GCONFLAYER_H

    44 

    45 #include "qvaluespace_p.h"

    46 #include "qvaluespacepublisher.h"

    47 

    48 #include <QSet>

    49 #include "gconfitem_p.h"

    50 #include <QMutex>

    51 

    52 QTM_BEGIN_NAMESPACE

    53 

    54 class GConfLayer : public QAbstractValueSpaceLayer

    55 {

    56     Q_OBJECT

    57 

    58 public:

    59     GConfLayer();

    60     virtual ~GConfLayer();

    61 

    62 protected:

    63     /*virtual*/ QString name();

    64 

    65     /*virtual*/ bool startup(Type type);

    66 

    67     /*virtual*/ QUuid id();

    68     /*virtual*/ unsigned int order();

    69 

    70     /*virtual*/ Handle item(Handle parent, const QString &subPath);

    71     /*virtual*/ void removeHandle(Handle handle);

    72     /*virtual*/ void setProperty(Handle handle, Properties properties);

    73 

    74     /*virtual*/ bool value(Handle handle, QVariant *data);

    75     /*virtual*/ bool value(Handle handle, const QString &subPath, QVariant *data);

    76     /*virtual*/ QSet<QString> children(Handle handle);

    77 

    78     /*virtual*/ QValueSpace::LayerOptions layerOptions() const;

    79 

    80     /* QValueSpaceSubscriber functions */

    81     /*virtual*/ bool supportsInterestNotification() const;

    82     /*virtual*/ bool notifyInterest(Handle handle, bool interested);

    83 

    84     /* QValueSpacePublisher functions */

    85     /*virtual*/ bool setValue(QValueSpacePublisher *creator, Handle handle,

    86                               const QString &subPath, const QVariant &value);

    87     /*virtual*/ bool removeValue(QValueSpacePublisher *creator, Handle handle,

    88                                  const QString &subPath);

    89     /*virtual*/ bool removeSubTree(QValueSpacePublisher *creator, Handle handle);

    90     /*virtual*/ void addWatch(QValueSpacePublisher *creator, Handle handle);

    91     /*virtual*/ void removeWatches(QValueSpacePublisher *creator, Handle parent);

    92     /*virtual*/ void sync();

    93 

    94 public:

    95     static GConfLayer *instance();

    96 

    97 private slots:

    98     void notifyChanged(const QString &key, const QVariant &value);

    99 

   100 private:

   101     struct GConfHandle {

   102         GConfHandle(const QString &p)

   103         :   path(p), refCount(1)

   104         {

   105         }

   106 

   107         QString path;

   108         unsigned int refCount;

   109     };

   110 

   111     QHash<QString, GConfHandle *> m_handles;

   112 

   113     GConfHandle *gConfHandle(Handle handle)

   114     {

   115         if (handle == InvalidHandle)

   116             return 0;

   117 

   118         GConfHandle *h = reinterpret_cast<GConfHandle *>(handle);

   119         if (m_handles.values().contains(h))

   120             return h;

   121 

   122         return 0;

   123     }

   124 

   125     //private methods not locking a mutex

   126     bool getValue(Handle handle, const QString &subPath, QVariant *data);

   127     Handle getItem(Handle parent, const QString &subPath);

   128     void doRemoveHandle(Handle handle);

   129 

   130 private:    //data

   131     QSet<GConfHandle *> m_monitoringHandles;

   132     QMap<QString, GConfItem *> m_monitoringItems;

   133     QMutex m_mutex;

   134 };

   135 

   136 QTM_END_NAMESPACE

   137 

   138 #endif //GCONFLAYER_H