1 files changed, 124 insertions, 0 deletions
diff --git a/src/revisioncontrolobserver.cpp b/src/revisioncontrolobserver.cpp
new file mode 100644
index 000000000..99fd61b67
--- /dev/null
+++ b/src/revisioncontrolobserver.cpp
@@ -0,0 +1,124 @@
+/***************************************************************************
+ *   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 "revisioncontrolobserver.h"
+
+#include "dolphinmodel.h"
+#include "revisioncontrolplugin.h"
+
+#include <kdirlister.h>
+
+#include <QAbstractProxyModel>
+#include <QAbstractItemView>
+#include <QTimer>
+
+RevisionControlObserver::RevisionControlObserver(QAbstractItemView* view) :
+    QObject(view),
+    m_view(view),
+    m_dirLister(0),
+    m_dolphinModel(0),
+    m_dirVerificationTimer(0),
+    m_plugin(0)
+{
+    Q_ASSERT(view != 0);
+
+    QAbstractProxyModel* proxyModel = qobject_cast<QAbstractProxyModel*>(view->model());
+    m_dolphinModel = (proxyModel == 0) ?
+                 qobject_cast<DolphinModel*>(view->model()) :
+                 qobject_cast<DolphinModel*>(proxyModel->sourceModel());
+    if (m_dolphinModel != 0) {
+        m_dirLister = m_dolphinModel->dirLister();
+        connect(m_dirLister, SIGNAL(completed()),
+                this, SLOT(delayedDirectoryVerification()));
+        // TODO:
+        // connect(m_dirLister, SIGNAL(refreshItems(const QList<QPair<KFileItem,KFileItem>>&)),
+        //        this, SLOT(refreshItems()));
+
+        // The verification timer specifies the timeout until the shown directory
+        // is checked whether it is versioned. Per default it is assumed that users
+        // don't iterate through versioned directories and a high timeout is used
+        // The timeout will be decreased as soon as a versioned directory has been
+        // found (see verifyDirectory()).
+        m_dirVerificationTimer = new QTimer(this);
+        m_dirVerificationTimer->setSingleShot(true);
+        m_dirVerificationTimer->setInterval(500);
+        connect(m_dirVerificationTimer, SIGNAL(timeout()),
+                this, SLOT(verifyDirectory()));
+    }
+}
+
+RevisionControlObserver::~RevisionControlObserver()
+{
+    delete m_plugin;
+    m_plugin = 0;
+}
+
+void RevisionControlObserver::delayedDirectoryVerification()
+{
+    m_dirVerificationTimer->start();
+}
+
+void RevisionControlObserver::verifyDirectory()
+{
+    KUrl revisionControlUrl = m_dirLister->url();
+    if (!revisionControlUrl.isLocalFile()) {
+        return;
+    }
+
+    if (m_plugin == 0) {
+        // TODO: just for testing purposes. A plugin approach will be used later.
+        m_plugin = new SubversionPlugin();
+    }
+
+    revisionControlUrl.addPath(m_plugin->fileName());
+    KFileItem item = m_dirLister->findByUrl(revisionControlUrl);
+    if (item.isNull()) {
+        // The directory is not versioned. Reset the verification timer to a higher
+        // value, so that browsing through non-versioned directories is not slown down
+        // by an immediate verification.
+        m_dirVerificationTimer->setInterval(500);
+    } else {
+        // The directory is versioned. Assume that the user will further browse through
+        // versioned directories and decrease the verification timer.
+        m_dirVerificationTimer->setInterval(100);
+        updateItemStates();
+    }
+}
+
+void RevisionControlObserver::updateItemStates()
+{
+    Q_ASSERT(m_plugin != 0);
+    const KUrl directory = m_dirLister->url();
+    if (!m_plugin->beginRetrieval(directory.toLocalFile(KUrl::AddTrailingSlash))) {
+        return;
+    }
+
+    const int rowCount = m_dolphinModel->rowCount();
+    for (int row = 0; row < rowCount; ++row) {
+        const QModelIndex index = m_dolphinModel->index(row, DolphinModel::Revision);
+        const KFileItem item = m_dolphinModel->itemForIndex(index);
+        const RevisionControlPlugin::RevisionState revision = m_plugin->revisionState(item.name());
+        m_dolphinModel->setData(index, QVariant(static_cast<int>(revision)), Qt::DecorationRole);
+    }
+    m_view->viewport()->repaint(); // TODO: this should not be necessary, as DolphinModel::setData() calls dataChanged()
+
+    m_plugin->endRetrieval();
+}
+
+#include "revisioncontrolobserver.moc"