1 /****************************************************************************

     2 **

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

     4 ** All rights reserved.

     5 ** Contact: Nokia Corporation (qt-info@nokia.com)

     6 **

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

     8 **

     9 ** $QT_BEGIN_LICENSE:LGPL$

    10 ** No Commercial Usage

    11 ** This file contains pre-release code and may not be distributed.

    12 ** You may use this file in accordance with the terms and conditions

    13 ** contained in the Technology Preview License Agreement accompanying

    14 ** this package.

    15 **

    16 ** GNU Lesser General Public License Usage

    17 ** Alternatively, this file may be used under the terms of the GNU Lesser

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

    19 ** Foundation and appearing in the file LICENSE.LGPL included in the

    20 ** packaging of this file.  Please review the following information to

    21 ** ensure the GNU Lesser General Public License version 2.1 requirements

    22 ** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.

    23 **

    24 ** In addition, as a special exception, Nokia gives you certain additional

    25 ** rights.  These rights are described in the Nokia Qt LGPL Exception

    26 ** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.

    27 **

    28 ** If you have questions regarding the use of this file, please contact

    29 ** Nokia at qt-info@nokia.com.

    30 **

    31 **

    32 **

    33 **

    34 **

    35 **

    36 **

    37 **

    38 ** $QT_END_LICENSE$

    39 **

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

    41 

    42 #include "gconflayer_linux_p.h"

    43 #include <QVariant>

    44 

    45 QTM_BEGIN_NAMESPACE

    46 

    47 Q_GLOBAL_STATIC(GConfLayer, gConfLayer);

    48 QVALUESPACE_AUTO_INSTALL_LAYER(GConfLayer);

    49 

    50 GConfLayer::GConfLayer()

    51 {

    52     GConfItem *gconfItem = new GConfItem("/", true, this);

    53     connect(gconfItem, SIGNAL(subtreeChanged(const QString &, const QVariant &)), this, SLOT(notifyChanged(const QString &, const QVariant &)));

    54 }

    55 

    56 GConfLayer::~GConfLayer()

    57 {

    58     QMutableHashIterator<QString, GConfHandle *> i(m_handles);

    59     while (i.hasNext()) {

    60         i.next();

    61 

    62         doRemoveHandle(Handle(i.value()));

    63     }

    64 }

    65 

    66 QString GConfLayer::name()

    67 {

    68     return QLatin1String("GConf Layer");

    69 }

    70 

    71 QUuid GConfLayer::id()

    72 {

    73     return QVALUESPACE_GCONF_LAYER;

    74 }

    75 

    76 unsigned int GConfLayer::order()

    77 {

    78     return 0;

    79 }

    80 

    81 QValueSpace::LayerOptions GConfLayer::layerOptions() const

    82 {

    83     return QValueSpace::PermanentLayer |

    84         QValueSpace::WritableLayer;

    85 }

    86 

    87 GConfLayer *GConfLayer::instance()

    88 {

    89     return gConfLayer();

    90 }

    91 

    92 bool GConfLayer::startup(Type /*type*/)

    93 {

    94     return true;

    95 }

    96 

    97 bool GConfLayer::value(Handle handle, QVariant *data)

    98 {

    99     QMutexLocker locker(&m_mutex);

   100     GConfHandle *sh = gConfHandle(handle);

   101     if (!sh)

   102         return false;

   103 

   104     return getValue(InvalidHandle, sh->path, data);

   105 }

   106 

   107 bool GConfLayer::value(Handle handle, const QString &subPath, QVariant *data)

   108 {

   109     QMutexLocker locker(&m_mutex);

   110     return getValue(handle, subPath, data);

   111 }

   112 

   113 bool GConfLayer::getValue(Handle handle, const QString &subPath, QVariant *data)

   114 {

   115     if (handle != InvalidHandle && !gConfHandle(handle))

   116         return false;

   117 

   118     QString path(subPath);

   119     while (path.endsWith(QLatin1Char('/')))

   120         path.chop(1);

   121     if (handle != InvalidHandle)

   122         while (path.startsWith(QLatin1Char('/')))

   123             path = path.mid(1);

   124     int index = path.lastIndexOf(QLatin1Char('/'), -1);

   125 

   126     bool createdHandle = false;

   127 

   128     QString value;

   129     if (index == -1) {

   130         value = path;

   131     } else {

   132         // want a value that is in a sub path under handle

   133         value = path.mid(index + 1);

   134         path.truncate(index);

   135 

   136         handle = getItem(handle, path);

   137         createdHandle = true;

   138     }

   139 

   140     GConfHandle *sh = gConfHandle(handle);

   141     if (!sh)

   142         return false;

   143 

   144     QString fullPath(sh->path);

   145     if (fullPath != QLatin1String("/") && !value.isEmpty())

   146         fullPath.append(QLatin1Char('/'));

   147 

   148     fullPath.append(value);

   149 

   150     GConfItem gconfItem(fullPath);

   151     QVariant readValue = gconfItem.value();

   152     switch (readValue.type()) {

   153     case QVariant::Invalid:

   154     case QVariant::Bool:

   155     case QVariant::Int:

   156     case QVariant::Double:

   157     case QVariant::StringList:

   158     case QVariant::List:

   159         *data = readValue;

   160         break;

   161     case QVariant::String:

   162     {

   163         QString readString = readValue.toString();

   164         QDataStream readStream(QByteArray::fromBase64(readString.toAscii()));

   165         QVariant serializedValue;

   166         readStream >> serializedValue;

   167         if (serializedValue.isValid()) {

   168             *data = serializedValue;

   169         } else {

   170             *data = readValue;

   171         }

   172         break;

   173     }

   174     default:

   175         break;

   176     }

   177 

   178     if (createdHandle)

   179         doRemoveHandle(handle);

   180     return data->isValid();

   181 }

   182 

   183 QSet<QString> GConfLayer::children(Handle handle)

   184 {

   185     QMutexLocker locker(&m_mutex);

   186 

   187     GConfHandle *sh = gConfHandle(handle);

   188     if (!sh)

   189         return QSet<QString>();

   190 

   191     GConfItem gconfItem(sh->path);

   192 

   193     QSet<QString> ret;

   194     foreach (const QString &child, gconfItem.listEntries() + gconfItem.listDirs()) {

   195         const int index = child.lastIndexOf(QLatin1Char('/'), -1);

   196         ret += child.mid(index + 1);

   197     }

   198 

   199     return ret;

   200 }

   201 

   202 QAbstractValueSpaceLayer::Handle GConfLayer::item(Handle parent, const QString &subPath)

   203 {

   204     QMutexLocker locker(&m_mutex);

   205     return getItem(parent, subPath);

   206 }

   207 

   208 QAbstractValueSpaceLayer::Handle GConfLayer::getItem(Handle parent, const QString &subPath)

   209 {

   210     QString fullPath;

   211 

   212     // Fail on invalid path.

   213     if (subPath.isEmpty() || subPath.contains(QLatin1String("//")))

   214         return InvalidHandle;

   215 

   216     if (parent == InvalidHandle) {

   217         fullPath = subPath;

   218     } else {

   219         GConfHandle *sh = gConfHandle(parent);

   220         if (!sh)

   221             return InvalidHandle;

   222 

   223         if (subPath == QLatin1String("/")) {

   224             fullPath = sh->path;

   225         } else if (sh->path.endsWith(QLatin1Char('/')) && subPath.startsWith(QLatin1Char('/')))

   226             fullPath = sh->path + subPath.mid(1);

   227         else if (!sh->path.endsWith(QLatin1Char('/')) && !subPath.startsWith(QLatin1Char('/')))

   228             fullPath = sh->path + QLatin1Char('/') + subPath;

   229         else

   230             fullPath = sh->path + subPath;

   231     }

   232 

   233     if (m_handles.contains(fullPath)) {

   234         GConfHandle *sh = m_handles.value(fullPath);

   235         ++sh->refCount;

   236         return Handle(sh);

   237     }

   238 

   239     // Create a new handle for path

   240     GConfHandle *sh = new GConfHandle(fullPath);

   241     m_handles.insert(fullPath, sh);

   242 

   243     return Handle(sh);

   244 }

   245 

   246 void GConfLayer::setProperty(Handle handle, Properties properties)

   247 {

   248     QMutexLocker locker(&m_mutex);

   249 

   250     GConfHandle *sh = gConfHandle(handle);

   251     if (!sh)

   252         return;

   253     QString basePath = sh->path;

   254     if (!basePath.endsWith(QLatin1Char('/'))) {

   255         basePath += QLatin1Char('/');

   256     }

   257 

   258     if (properties & QAbstractValueSpaceLayer::Publish) {

   259         m_monitoringHandles.insert(sh);

   260     } else {

   261         m_monitoringHandles.remove(sh);

   262     }

   263 }

   264 

   265 void GConfLayer::removeHandle(Handle handle)

   266 {

   267     QMutexLocker locker(&m_mutex);

   268     doRemoveHandle(handle);

   269 }

   270 

   271 void GConfLayer::doRemoveHandle(Handle handle)

   272 {

   273     GConfHandle *sh = gConfHandle(handle);

   274     if (!sh)

   275         return;

   276 

   277     if (--sh->refCount)

   278         return;

   279 

   280     m_monitoringHandles.remove(sh);

   281     m_handles.remove(sh->path);

   282 

   283     delete sh;

   284 }

   285 

   286 bool GConfLayer::setValue(QValueSpacePublisher */*creator*/,

   287                                     Handle handle,

   288                                     const QString &subPath,

   289                                     const QVariant &data)

   290 {

   291     QMutexLocker locker(&m_mutex);

   292 

   293     GConfHandle *sh = gConfHandle(handle);

   294     if (!sh)

   295         return false;

   296 

   297     QString path(subPath);

   298     while (path.endsWith(QLatin1Char('/')))

   299         path.chop(1);

   300 

   301     int index = path.lastIndexOf(QLatin1Char('/'), -1);

   302 

   303     bool createdHandle = false;

   304 

   305     QString value;

   306     if (index == -1) {

   307         value = path;

   308     } else {

   309         // want a value that is in a sub path under handle

   310         value = path.mid(index + 1);

   311         path.truncate(index);

   312 

   313         if (path.isEmpty())

   314             path.append(QLatin1Char('/'));

   315 

   316         sh = gConfHandle(getItem(Handle(sh), path));

   317         createdHandle = true;

   318     }

   319 

   320     QString fullPath(sh->path);

   321     if (fullPath != QLatin1String("/"))

   322         fullPath.append(QLatin1Char('/'));

   323 

   324     fullPath.append(value);

   325 

   326     GConfItem gconfItem(fullPath);

   327     switch (data.type()) {

   328     case QVariant::Invalid:

   329     case QVariant::Bool:

   330     case QVariant::Int:

   331     case QVariant::Double:

   332     case QVariant::String:

   333     case QVariant::StringList:

   334     case QVariant::List:

   335         gconfItem.set(data);

   336         break;

   337     default:

   338         QByteArray byteArray;

   339         QDataStream writeStream(&byteArray, QIODevice::WriteOnly);

   340         writeStream << data;

   341         QString serializedValue(byteArray.toBase64());

   342         gconfItem.set(serializedValue);

   343     }

   344 

   345     if (createdHandle)

   346         doRemoveHandle(Handle(sh));

   347 

   348     return true;

   349 }

   350 

   351 void GConfLayer::sync()

   352 {

   353     //Not needed

   354 }

   355 

   356 bool GConfLayer::removeSubTree(QValueSpacePublisher * /*creator*/, Handle /*handle*/)

   357 {

   358     //Not needed

   359     return false;

   360 }

   361 

   362 bool GConfLayer::removeValue(QValueSpacePublisher */*creator*/,

   363     Handle handle,

   364     const QString &subPath)

   365 {

   366     QMutexLocker locker(&m_mutex);

   367 

   368     QString fullPath;

   369 

   370     GConfHandle *sh = gConfHandle(handle);

   371     if (!sh)

   372         return false;

   373 

   374     if (handle == InvalidHandle) {

   375         fullPath = subPath;

   376     } else {

   377         if (subPath == QLatin1String("/"))

   378             fullPath = sh->path;

   379         else if (sh->path.endsWith(QLatin1Char('/')) && subPath.startsWith(QLatin1Char('/')))

   380             fullPath = sh->path + subPath.mid(1);

   381         else if (!sh->path.endsWith(QLatin1Char('/')) && !subPath.startsWith(QLatin1Char('/')))

   382             fullPath = sh->path + QLatin1Char('/') + subPath;

   383         else

   384             fullPath = sh->path + subPath;

   385     }

   386 

   387     GConfItem gconfItem(fullPath);

   388     gconfItem.unset();

   389 

   390     return true;

   391 }

   392 

   393 void GConfLayer::addWatch(QValueSpacePublisher *, Handle)

   394 {

   395     //Not needed

   396 }

   397 

   398 void GConfLayer::removeWatches(QValueSpacePublisher *, Handle)

   399 {

   400     //Not needed

   401 }

   402 

   403 bool GConfLayer::supportsInterestNotification() const

   404 {

   405     return false;

   406 }

   407 

   408 bool GConfLayer::notifyInterest(Handle, bool)

   409 {

   410     //Not needed

   411     return false;

   412 }

   413 

   414 void GConfLayer::notifyChanged(const QString &key, const QVariant & /*value*/)

   415 {

   416     foreach (GConfHandle *handle, m_monitoringHandles.values()) {

   417         if (key.startsWith(handle->path)) {

   418             emit handleChanged(Handle(handle));

   419         }

   420     }

   421 }

   422 

   423 #include "moc_gconflayer_linux_p.cpp"

   424 

   425 QTM_END_NAMESPACE