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

     2 **

     3 ** Copyright (C) 2009 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 "qvaluespacemanager_p.h"

    43 

    44 QTM_BEGIN_NAMESPACE

    45 

    46 Q_GLOBAL_STATIC(QValueSpaceManager, valueSpaceManager);

    47 

    48 QValueSpaceManager *QValueSpaceManager::instance()

    49 {

    50     return valueSpaceManager();

    51 }

    52 

    53 QValueSpaceManager::QValueSpaceManager()

    54 : type(Uninit)

    55 {

    56 }

    57 

    58 void QValueSpaceManager::initServer()

    59 {

    60     Q_ASSERT(Uninit == type);

    61 

    62     commonInit(QAbstractValueSpaceLayer::Server);

    63 }

    64 

    65 void QValueSpaceManager::init()

    66 {

    67     if(Uninit != type)

    68         return; // Already initialized

    69 

    70     commonInit(QAbstractValueSpaceLayer::Client);

    71 }

    72 

    73 void QValueSpaceManager::commonInit(QAbstractValueSpaceLayer::Type vsltype)

    74 {

    75     Q_ASSERT(Uninit == type);

    76 

    77     // Install all the dormant layers

    78     for(int ii = 0; ii < funcs.count(); ++ii)

    79         install(funcs[ii]());

    80     funcs.clear();

    81 

    82     type = (vsltype == QAbstractValueSpaceLayer::Server)?Server:Client;

    83 

    84     for(int ii = 0; ii < layers.count(); ++ii) {

    85         if(!initLayer(layers.at(ii))) {

    86             layers.removeAt(ii);

    87             --ii;

    88         }

    89     }

    90 }

    91 

    92 bool QValueSpaceManager::isServer() const

    93 {

    94     return (Server == type);

    95 }

    96 

    97 void QValueSpaceManager::install(QAbstractValueSpaceLayer * layer)

    98 {

    99     Q_ASSERT(Uninit == type);

   100     Q_ASSERT(layer);

   101     unsigned int cOrder = layer->order();

   102     int inserted = -1;

   103     for(int ii = 0; !inserted && ii < layers.count(); ++ii) {

   104         unsigned int lOrder = layers.at(ii)->order();

   105         Q_ASSERT(layer != layers.at(ii));

   106         if(lOrder < cOrder) {

   107             // Do nothing

   108         } else if(lOrder == cOrder) {

   109             if(layers.at(ii)->id() > layer->id()) {

   110                 layers.insert(ii, layer);

   111                 inserted = ii;

   112             }

   113         } else if(lOrder > cOrder) {

   114             layers.insert(ii, layer);

   115             inserted = ii;

   116         }

   117     }

   118 

   119     if(-1 == inserted) {

   120         inserted = layers.count();

   121         layers.append(layer);

   122     }

   123 }

   124 

   125 void QValueSpaceManager::install(QValueSpace::LayerCreateFunc func)

   126 {

   127     Q_ASSERT(Uninit == type);

   128     funcs.append(func);

   129 }

   130 

   131 QList<QAbstractValueSpaceLayer *> const & QValueSpaceManager::getLayers()

   132 {

   133     init(); // Fallback init

   134 

   135     return layers;

   136 }

   137 

   138 bool QValueSpaceManager::initLayer(QAbstractValueSpaceLayer* layer)

   139 {

   140     Q_ASSERT(Uninit != type);

   141 

   142     return layer->startup((type==Client)?QAbstractValueSpaceLayer::Client:

   143                                          QAbstractValueSpaceLayer::Server);

   144 }

   145 

   146 QTM_END_NAMESPACE