1 files changed, 101 insertions, 0 deletions
diff --git a/src/views/versioncontrol/updateitemstatesthread.cpp b/src/views/versioncontrol/updateitemstatesthread.cpp
new file mode 100644
index 000000000..57c4481c3
--- /dev/null
+++ b/src/views/versioncontrol/updateitemstatesthread.cpp
@@ -0,0 +1,101 @@
+/***************************************************************************
+ *   Copyright (C) 2009 by Peter Penz <[email protected]>                  *
+ *                                                                         *
+ *   This program is free software; you can redistribute it and/or modify  *
+ *   it under the terms of the GNU General Public License as published by  *
+ *   the Free Software Foundation; either version 2 of the License, or     *
+ *   (at your option) any later version.                                   *
+ *                                                                         *
+ *   This program is distributed in the hope that it will be useful,       *
+ *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
+ *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
+ *   GNU General Public License for more details.                          *
+ *                                                                         *
+ *   You should have received a copy of the GNU General Public License     *
+ *   along with this program; if not, write to the                         *
+ *   Free Software Foundation, Inc.,                                       *
+ *   51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA            *
+ ***************************************************************************/
+
+#include "updateitemstatesthread.h"
+
+#include <QMutexLocker>
+
+UpdateItemStatesThread::UpdateItemStatesThread() :
+    QThread(),
+    m_globalPluginMutex(0),
+    m_plugin(0),
+    m_itemMutex(),
+    m_retrievedItems(false),
+    m_itemStates()
+{
+    // Several threads may share one instance of a plugin. A global
+    // mutex is required to serialize the retrieval of version control
+    // states inside run().
+    static QMutex globalMutex;
+    m_globalPluginMutex = &globalMutex;
+}
+
+UpdateItemStatesThread::~UpdateItemStatesThread()
+{
+}
+
+void UpdateItemStatesThread::setData(KVersionControlPlugin* plugin,
+                                     const QList<VersionControlObserver::ItemState>& itemStates)
+{
+    QMutexLocker itemLocker(&m_itemMutex);
+    m_itemStates = itemStates;
+
+    QMutexLocker pluginLocker(m_globalPluginMutex);
+    m_plugin = plugin;
+}
+
+void UpdateItemStatesThread::run()
+{
+    Q_ASSERT(!m_itemStates.isEmpty());
+    Q_ASSERT(m_plugin != 0);
+
+    // The items from m_itemStates may be located in different directory levels. The version
+    // plugin requires the root directory for KVersionControlPlugin::beginRetrieval(). Instead
+    // of doing an expensive search, we utilize the knowledge of the implementation of
+    // VersionControlObserver::addDirectory() to be sure that the last item contains the root.
+    QMutexLocker itemLocker(&m_itemMutex);
+    const QString directory = m_itemStates.last().item.url().directory(KUrl::AppendTrailingSlash);
+    itemLocker.unlock();
+
+    QMutexLocker pluginLocker(m_globalPluginMutex);
+    m_retrievedItems = false;
+    if (m_plugin->beginRetrieval(directory)) {
+        itemLocker.relock();
+        const int count = m_itemStates.count();
+        for (int i = 0; i < count; ++i) {
+            m_itemStates[i].version = m_plugin->versionState(m_itemStates[i].item);
+        }
+        m_plugin->endRetrieval();
+        m_retrievedItems = true;
+    }
+}
+
+bool UpdateItemStatesThread::lockPlugin()
+{
+    return m_globalPluginMutex->tryLock(300);
+}
+
+void UpdateItemStatesThread::unlockPlugin()
+{
+    m_globalPluginMutex->unlock();
+}
+
+QList<VersionControlObserver::ItemState> UpdateItemStatesThread::itemStates() const
+{
+    QMutexLocker locker(&m_itemMutex);
+    return m_itemStates;
+}
+
+bool UpdateItemStatesThread::retrievedItems() const
+{
+    QMutexLocker locker(&m_itemMutex);
+    return m_retrievedItems;
+}
+
+#include "updateitemstatesthread.moc"