1 /*

     2  * Copyright (c) 2010 Nokia Corporation and/or its subsidiary(-ies).

     3  * All rights reserved.

     4  * This component and the accompanying materials are made available

     5  * under the terms of "Eclipse Public License v1.0"

     6  * which accompanies this distribution, and is available

     7  * at the URL "http://www.eclipse.org/legal/epl-v10.html".

     8  *

     9  * Initial Contributors:

    10  * Nokia Corporation - initial contribution.

    11  *

    12  * Contributors:

    13  *

    14  * Description: Implementation of the Positioning Settings Plugins Loader class 

    15  *

    16  */

    17 

    18 

    19 #include "possettingspluginsloader.h"

    20 #include "possettingscrkey.h"

    21 #include <QDir>

    22 #include <QFileInfoList>

    23 #include <QFileInfo>

    24 #include <QPluginLoader>

    25 #include <QDebug>

    26 #include <xqsettingsmanager.h>

    27 #include <xqsettingskey.h>

    28 

    29 

    30 #ifdef Q_OS_SYMBIAN

    31 #define PLUGIN_PATH QString("\\resource\\qt\\plugins\\positioningsettings")

    32 

    33 #else

    34 #define PLUGIN_PATH QString("C:\\qt\\plugins\\positioningsettings")

    35 #endif 

    36 

    37 // constants

    38 const int KNoOfDigits = 4;

    39 

    40 //---------------------------------------------------------------------

    41 // PosSettingsPluginsLoader::PosSettingsPluginsLoader

    42 // 

    43 //---------------------------------------------------------------------

    44 PosSettingsPluginsLoader::PosSettingsPluginsLoader()

    45     {

    46     qDebug() << "+ PosSettingsPluginsLoader::PosSettingsPluginsLoader()";

    47     qDebug() << "- PosSettingsPluginsLoader::PosSettingsPluginsLoader()";

    48     }

    49 

    50 //---------------------------------------------------------------------

    51 // PosSettingsPluginsLoader::~PosSettingsPluginsLoader

    52 // 

    53 //---------------------------------------------------------------------

    54 PosSettingsPluginsLoader::~PosSettingsPluginsLoader()

    55     {

    56     qDebug() << "+ PosSettingsPluginsLoader::~PosSettingsPluginsLoader()";

    57     mDllNameList.clear();

    58     qDebug() << "- PosSettingsPluginsLoader::~PosSettingsPluginsLoader()";

    59     }

    60 //---------------------------------------------------------------------

    61 // PosSettingsPluginsLoader::loadPlugins

    62 // 

    63 //---------------------------------------------------------------------

    64 QList<PosSettingsAdvInterface*> PosSettingsPluginsLoader::loadPlugins()

    65     {

    66     qDebug() << "+ PosSettingsPluginsLoader::loadPlugins()";

    67     // parse the default cen rep key value which is used to determine

    68     // the order of loading the default positioning settings plugins

    69     ParseCenRepKey();

    70     // List containing the plugins implementing the PositioningSettingsAdvancedInterface

    71     QList<PosSettingsAdvInterface*> pluginsList;

    72     // Check for the files under the positioningsettings directory

    73     QDir pluginsDir(PLUGIN_PATH + QDir::separator());

    74     QFileInfoList fileInfoList = pluginsDir.entryInfoList();

    75     // check each file in this directory,only if its a dll give it to the

    76     // plugin loader

    77     foreach ( const QFileInfo &fileInfo, fileInfoList )

    78             {

    79             QString fileName = fileInfo.absoluteFilePath();

    80 						qDebug() << "Filename: " <<  fileName;

    81 						

    82             if (!QLibrary::isLibrary(fileName))

    83                 {

    84                 continue;

    85                 }

    86             // load the dlls using QPluginLoader

    87             QPluginLoader pluginLoader(pluginsDir.absoluteFilePath(fileName));

    88             qDebug() << "Plugin Filename: " <<  pluginsDir.absoluteFilePath(fileName);

    89             QObject *plugin = pluginLoader.instance();

    90             // Check if the plugin found is an implementation of the

    91             // PosSettingsAdvInterface,if yes add it to the plugins list

    92 

    93             if (plugin)

    94                 {

    95                 PosSettingsAdvInterface* advancedInterface = qobject_cast<

    96                         PosSettingsAdvInterface *> (plugin);

    97 

    98                 if (advancedInterface)

    99                     {

   100                     

   101                     QString dllName = fileInfo.baseName();

   102                     // check the position into which the plugin needs to be

   103                     // inserted if it is one of the default plugins

   104                     for (int i = 0; i < mDllNameList.count(); i++)

   105                         {

   106                         if (dllName.compare(mDllNameList[i],Qt::CaseInsensitive) == KErrNone)

   107                             {

   108                             pluginsList.insert(i, advancedInterface);

   109                             break;

   110                             }

   111                         }

   112                     }

   113                 }

   114             }

   115     qDebug() << "- PosSettingsPluginsLoader::loadPlugins()";

   116     return pluginsList;

   117     }

   118 

   119 //---------------------------------------------------------------------

   120 // PosSettingsPluginsLoader::ParseCenRepKey

   121 // 

   122 //---------------------------------------------------------------------

   123 void PosSettingsPluginsLoader::ParseCenRepKey()

   124     {

   125     qDebug() << "+ PosSettingsPluginsLoader::ParseCenRepKey()";

   126     // create a XQSettingsManager instance

   127     XQSettingsManager* manager = new XQSettingsManager();

   128     // create a XQSettingsKey object to read the cenrep key value

   129     XQSettingsKey cenrepKey(XQSettingsKey::TargetCentralRepository,

   130             KCRUidPositioningSettings.iUid, KPositioningSettingsPlugins);

   131     // read the cenrep key value

   132     QVariant key(manager->readItemValue(cenrepKey,XQSettingsManager::TypeString));

   133     // convert the key value to string

   134     QString keyStringValue = key.toString();

   135     // if the length of default value is less than 4 digits then return

   136     if (keyStringValue.size() < KNoOfDigits)

   137         {

   138         qDebug() << "- PosSettingsPluginsLoader::ParseCenRepKey()";

   139         return;

   140         }

   141     // get the count of the number of plugin dlls

   142     int dllCount = keyStringValue.left(KNoOfDigits).toInt();

   143     // initialise current index to 4

   144     int currentIndex = KNoOfDigits;

   145     // extract the name of each of the dll from the cenrep key value

   146     for (int i = 0; i < dllCount; i++)

   147         {

   148         // extract length of dll name

   149         int length = keyStringValue.mid(currentIndex, KNoOfDigits).toInt();

   150         // increment the current index value

   151         currentIndex += KNoOfDigits;

   152         // get the dll name

   153         QString dllName = keyStringValue.mid(currentIndex, length);

   154         // append to list of dll names

   155         mDllNameList.append(dllName);

   156         // increment the value of currentIndex by length of name

   157         currentIndex += length;

   158         }

   159     qDebug() << "- PosSettingsPluginsLoader::ParseCenRepKey()";

   160     }

   161