354 lines
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<h1 class="title">plugin.cpp Example File</h1>
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<span class="small-subtitle">declarative/cppextensions/plugins/plugin.cpp</span>
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<!-- $$$declarative/cppextensions/plugins/plugin.cpp-description -->
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<div class="descr"> <a name="details"></a>
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<pre class="cpp"> <span class="comment">/****************************************************************************
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**
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** Copyright (C) 2015 The Qt Company Ltd.
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** Contact: http://www.qt.io/licensing/
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**
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** This file is part of the examples of the Qt Toolkit.
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**
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** $QT_BEGIN_LICENSE:BSD$
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** You may use this file under the terms of the BSD license as follows:
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**
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** "Redistribution and use in source and binary forms, with or without
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** modification, are permitted provided that the following conditions are
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** met:
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** * Redistributions of source code must retain the above copyright
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** notice, this list of conditions and the following disclaimer.
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** * Redistributions in binary form must reproduce the above copyright
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** notice, this list of conditions and the following disclaimer in
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** the documentation and/or other materials provided with the
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** distribution.
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** * Neither the name of The Qt Company Ltd nor the names of its
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** contributors may be used to endorse or promote products derived
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** from this software without specific prior written permission.
|
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**
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**
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** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
|
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** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
|
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** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
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**
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** $QT_END_LICENSE$
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**
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****************************************************************************/</span>
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<span class="preprocessor">#include <QtDeclarative/QDeclarativeExtensionPlugin></span>
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<span class="preprocessor">#include <QtDeclarative/qdeclarative.h></span>
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<span class="preprocessor">#include <qdebug.h></span>
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<span class="preprocessor">#include <qdatetime.h></span>
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<span class="preprocessor">#include <qbasictimer.h></span>
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<span class="preprocessor">#include <qapplication.h></span>
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<span class="comment">// Implements a "TimeModel" class with hour and minute properties</span>
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<span class="comment">// that change on-the-minute yet efficiently sleep the rest</span>
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<span class="comment">// of the time.</span>
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<span class="keyword">class</span> MinuteTimer : <span class="keyword">public</span> <span class="type"><a href="qobject.html">QObject</a></span>
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{
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Q_OBJECT
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<span class="keyword">public</span>:
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MinuteTimer(<span class="type"><a href="qobject.html">QObject</a></span> <span class="operator">*</span>parent) : <span class="type"><a href="qobject.html">QObject</a></span>(parent)
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{
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}
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<span class="type">void</span> start()
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{
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<span class="keyword">if</span> (<span class="operator">!</span>timer<span class="operator">.</span>isActive()) {
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time <span class="operator">=</span> <span class="type"><a href="qtime.html">QTime</a></span><span class="operator">::</span>currentTime();
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timer<span class="operator">.</span>start(<span class="number">60000</span><span class="operator">-</span>time<span class="operator">.</span>second()<span class="operator">*</span><span class="number">1000</span><span class="operator">,</span> <span class="keyword">this</span>);
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}
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}
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<span class="type">void</span> stop()
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{
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timer<span class="operator">.</span>stop();
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}
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<span class="type">int</span> hour() <span class="keyword">const</span> { <span class="keyword">return</span> time<span class="operator">.</span>hour(); }
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<span class="type">int</span> minute() <span class="keyword">const</span> { <span class="keyword">return</span> time<span class="operator">.</span>minute(); }
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<span class="keyword">signals</span>:
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<span class="type">void</span> timeChanged();
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<span class="keyword">protected</span>:
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<span class="type">void</span> timerEvent(<span class="type"><a href="qtimerevent.html">QTimerEvent</a></span> <span class="operator">*</span>)
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{
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<span class="type"><a href="qtime.html">QTime</a></span> now <span class="operator">=</span> <span class="type"><a href="qtime.html">QTime</a></span><span class="operator">::</span>currentTime();
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<span class="keyword">if</span> (now<span class="operator">.</span>second() <span class="operator">=</span><span class="operator">=</span> <span class="number">59</span> <span class="operator">&</span><span class="operator">&</span> now<span class="operator">.</span>minute() <span class="operator">=</span><span class="operator">=</span> time<span class="operator">.</span>minute() <span class="operator">&</span><span class="operator">&</span> now<span class="operator">.</span>hour() <span class="operator">=</span><span class="operator">=</span> time<span class="operator">.</span>hour()) {
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<span class="comment">// just missed time tick over, force it, wait extra 0.5 seconds</span>
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time<span class="operator">.</span>addSecs(<span class="number">60</span>);
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timer<span class="operator">.</span>start(<span class="number">60500</span><span class="operator">,</span> <span class="keyword">this</span>);
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} <span class="keyword">else</span> {
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time <span class="operator">=</span> now;
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timer<span class="operator">.</span>start(<span class="number">60000</span><span class="operator">-</span>time<span class="operator">.</span>second()<span class="operator">*</span><span class="number">1000</span><span class="operator">,</span> <span class="keyword">this</span>);
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}
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<span class="keyword">emit</span> timeChanged();
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}
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<span class="keyword">private</span>:
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<span class="type"><a href="qtime.html">QTime</a></span> time;
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<span class="type"><a href="qbasictimer.html">QBasicTimer</a></span> timer;
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};
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<span class="keyword">class</span> TimeModel : <span class="keyword">public</span> <span class="type"><a href="qobject.html">QObject</a></span>
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{
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Q_OBJECT
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Q_PROPERTY(<span class="type">int</span> hour READ hour NOTIFY timeChanged)
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Q_PROPERTY(<span class="type">int</span> minute READ minute NOTIFY timeChanged)
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<span class="keyword">public</span>:
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TimeModel(<span class="type"><a href="qobject.html">QObject</a></span> <span class="operator">*</span>parent<span class="operator">=</span><span class="number">0</span>) : <span class="type"><a href="qobject.html">QObject</a></span>(parent)
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{
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<span class="keyword">if</span> (<span class="operator">+</span><span class="operator">+</span>instances <span class="operator">=</span><span class="operator">=</span> <span class="number">1</span>) {
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<span class="keyword">if</span> (<span class="operator">!</span>timer)
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timer <span class="operator">=</span> <span class="keyword">new</span> MinuteTimer(qApp);
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connect(timer<span class="operator">,</span> SIGNAL(timeChanged())<span class="operator">,</span> <span class="keyword">this</span><span class="operator">,</span> SIGNAL(timeChanged()));
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timer<span class="operator">-</span><span class="operator">></span>start();
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}
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}
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<span class="operator">~</span>TimeModel()
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{
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<span class="keyword">if</span> (<span class="operator">-</span><span class="operator">-</span>instances <span class="operator">=</span><span class="operator">=</span> <span class="number">0</span>) {
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timer<span class="operator">-</span><span class="operator">></span>stop();
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}
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}
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<span class="type">int</span> minute() <span class="keyword">const</span> { <span class="keyword">return</span> timer<span class="operator">-</span><span class="operator">></span>minute(); }
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<span class="type">int</span> hour() <span class="keyword">const</span> { <span class="keyword">return</span> timer<span class="operator">-</span><span class="operator">></span>hour(); }
|
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|
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<span class="keyword">signals</span>:
|
|
<span class="type">void</span> timeChanged();
|
|
|
|
<span class="keyword">private</span>:
|
|
<span class="type"><a href="qtime.html">QTime</a></span> t;
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|
<span class="keyword">static</span> MinuteTimer <span class="operator">*</span>timer;
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<span class="keyword">static</span> <span class="type">int</span> instances;
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};
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<span class="type">int</span> TimeModel<span class="operator">::</span>instances<span class="operator">=</span><span class="number">0</span>;
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MinuteTimer <span class="operator">*</span>TimeModel<span class="operator">::</span>timer<span class="operator">=</span><span class="number">0</span>;
|
|
|
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<span class="keyword">class</span> <span class="type">QExampleQmlPlugin</span> : <span class="keyword">public</span> <span class="type"><a href="qdeclarativeextensionplugin.html">QDeclarativeExtensionPlugin</a></span>
|
|
{
|
|
Q_OBJECT
|
|
<span class="keyword">public</span>:
|
|
<span class="type">void</span> registerTypes(<span class="keyword">const</span> <span class="type">char</span> <span class="operator">*</span>uri)
|
|
{
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|
Q_ASSERT(uri <span class="operator">=</span><span class="operator">=</span> QLatin1String(<span class="string">"org.qtproject.TimeExample"</span>));
|
|
qmlRegisterType<span class="operator"><</span>TimeModel<span class="operator">></span>(uri<span class="operator">,</span> <span class="number">1</span><span class="operator">,</span> <span class="number">0</span><span class="operator">,</span> <span class="string">"Time"</span>);
|
|
}
|
|
};
|
|
|
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<span class="preprocessor">#include "plugin.moc"</span>
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|
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<a href="qtplugin.html#Q_EXPORT_PLUGIN2">Q_EXPORT_PLUGIN2</a>(qmlqtimeexampleplugin<span class="operator">,</span> <span class="type">QExampleQmlPlugin</span>);</pre>
|
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</div>
|
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<!-- @@@declarative/cppextensions/plugins/plugin.cpp -->
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<span></span>
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<div class="footer">
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<p>
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<acronym title="Copyright">©</acronym> 2015 The Qt Company Ltd.
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Documentation contributions included herein are the copyrights of
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their respective owners.</p>
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<br />
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<p>
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The documentation provided herein is licensed under the terms of the
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<a href="http://www.gnu.org/licenses/fdl.html">GNU Free Documentation
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License version 1.3</a> as published by the Free Software Foundation.</p>
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<p>
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Documentation sources may be obtained from <a href="http://www.qt-project.org">
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www.qt-project.org</a>.</p>
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<br />
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<p>
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Qt and respective logos are trademarks of The Qt Company Ltd
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in Finland and/or other countries worldwide. All other trademarks are property
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of their respective owners. <a title="Privacy Policy"
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href="http://en.gitorious.org/privacy_policy/">Privacy Policy</a></p>
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