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/****************************************************************************
**
** Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies).
** Contact: http://www.qt-project.org/legal
**
** This file is part of the Qt Mobility Components.
**
** $QT_BEGIN_LICENSE:LGPL$
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and Digia. For licensing terms and
** conditions see http://qt.digia.com/licensing. For further information
** use the contact form at http://qt.digia.com/contact-us.
**
** GNU Lesser General Public License Usage
** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 2.1 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL included in the
** packaging of this file. Please review the following information to
** ensure the GNU Lesser General Public License version 2.1 requirements
** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** In addition, as a special exception, Digia gives you certain additional
** rights. These rights are described in the Digia Qt LGPL Exception
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 3.0 as published by the Free Software
** Foundation and appearing in the file LICENSE.GPL included in the
** packaging of this file. Please review the following information to
** ensure the GNU General Public License version 3.0 requirements will be
** met: http://www.gnu.org/copyleft/gpl.html.
**
**
** $QT_END_LICENSE$
**
****************************************************************************/
#include <QDir>
#include <QFile>
#include <QDebug>
#include "databasefilewatcher_p.h"
DatabaseFileWatcher::DatabaseFileWatcher(const QString &databasePath, QObject *parent)
: QObject(parent),
m_watcher(0),
m_databasePath(databasePath)
{
}
QString DatabaseFileWatcher::closestExistingParent(const QString &path)
{
if (QFile::exists(path))
return path;
int lastSep = path.lastIndexOf(QDir::separator());
if (lastSep < 0)
return QString();
return closestExistingParent(path.mid(0, lastSep));
}
void DatabaseFileWatcher::restartDirMonitoring(const QString &previousDirPath)
{
if (m_watcher->files().contains(m_databasePath))
return;
QString existing = closestExistingParent(m_databasePath);
if (existing.isEmpty()) {
qWarning() << "QServiceManager: can't find existing directory for path to database" << m_databasePath
<< "serviceAdded() and serviceRemoved() will not be emitted";
return;
}
if (existing == m_databasePath) {
if (!previousDirPath.isEmpty())
m_watcher->removePath(previousDirPath);
setEnabled(true);
} else {
if (previousDirPath != existing) {
if (!previousDirPath.isEmpty())
m_watcher->removePath(previousDirPath);
if (!m_watcher->directories().contains(existing))
m_watcher->addPath(existing);
}
}
}
void DatabaseFileWatcher::setEnabled(bool enabled)
{
if (!m_watcher) {
m_watcher = new QFileSystemWatcher(this);
connect(m_watcher, SIGNAL(fileChanged(QString)),
SLOT(databaseChanged(QString)));
connect(m_watcher, SIGNAL(directoryChanged(QString)),
SLOT(databaseDirectoryChanged(QString)));
}
if (enabled) {
if (QFile::exists(m_databasePath)) {
if (!m_watcher->files().contains(m_databasePath))
m_watcher->addPath(m_databasePath);
} else {
restartDirMonitoring(QString());
}
} else {
m_watcher->removePath(m_databasePath);
}
}
void DatabaseFileWatcher::databaseDirectoryChanged(const QString &path)
{
if (m_databasePath.contains(path)) {
restartDirMonitoring(path);
}
}
void DatabaseFileWatcher::databaseChanged(const QString &path)
{
if (!QFile::exists(m_databasePath)) {
restartDirMonitoring(QString());;
}
emit notifyChange();
// if database was deleted, the path may have been dropped
if (!m_watcher->files().contains(path) && QFile::exists(path))
m_watcher->addPath(path);
}
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