Split polling watcher out to its own seperate files.

Just helps maintain sanity and clarity a bit.

Change-Id: Iaf00f9ecf2d959afcd8fe18bbca71a403cf9818d
Reviewed-by: Denis Dzyubenko <denis.dzyubenko@nokia.com>
Reviewed-by: Bradley T. Hughes <bradley.hughes@nokia.com>

1 files changed, 160 insertions, 0 deletions

diff --git a/src/corelib/io/qfilesystemwatcher_polling.cpp b/src/corelib/io/qfilesystemwatcher_polling.cpp
new file mode 100644
index 0000000000..be5d855e40
--- /dev/null
+++ b/src/corelib/io/qfilesystemwatcher_polling.cpp
@@ -0,0 +1,160 @@
+/****************************************************************************
+**
+** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies).
+** All rights reserved.
+** Contact: Nokia Corporation (qt-info@nokia.com)
+**
+** This file is part of the QtCore module of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** GNU Lesser General Public License Usage
+** 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, Nokia gives you certain additional
+** rights. These rights are described in the Nokia 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.
+**
+** Other Usage
+** Alternatively, this file may be used in accordance with the terms and
+** conditions contained in a signed written agreement between you and Nokia.
+**
+**
+**
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include "qfilesystemwatcher_polling_p.h"
+#include <QtCore/qtimer.h>
+
+QT_BEGIN_NAMESPACE
+
+QPollingFileSystemWatcherEngine::QPollingFileSystemWatcherEngine()
+{
+#ifndef QT_NO_THREAD
+    moveToThread(this);
+#endif
+}
+
+void QPollingFileSystemWatcherEngine::run()
+{
+    QTimer timer;
+    connect(&timer, SIGNAL(timeout()), SLOT(timeout()));
+    timer.start(PollingInterval);
+    (void) exec();
+}
+
+QStringList QPollingFileSystemWatcherEngine::addPaths(const QStringList &paths,
+                                                      QStringList *files,
+                                                      QStringList *directories)
+{
+    QMutexLocker locker(&mutex);
+    QStringList p = paths;
+    QMutableListIterator<QString> it(p);
+    while (it.hasNext()) {
+        QString path = it.next();
+        QFileInfo fi(path);
+        if (!fi.exists())
+            continue;
+        if (fi.isDir()) {
+            if (!directories->contains(path))
+                directories->append(path);
+            if (!path.endsWith(QLatin1Char('/')))
+                fi = QFileInfo(path + QLatin1Char('/'));
+            this->directories.insert(path, fi);
+        } else {
+            if (!files->contains(path))
+                files->append(path);
+            this->files.insert(path, fi);
+        }
+        it.remove();
+    }
+    start();
+    return p;
+}
+
+QStringList QPollingFileSystemWatcherEngine::removePaths(const QStringList &paths,
+                                                         QStringList *files,
+                                                         QStringList *directories)
+{
+    QMutexLocker locker(&mutex);
+    QStringList p = paths;
+    QMutableListIterator<QString> it(p);
+    while (it.hasNext()) {
+        QString path = it.next();
+        if (this->directories.remove(path)) {
+            directories->removeAll(path);
+            it.remove();
+        } else if (this->files.remove(path)) {
+            files->removeAll(path);
+            it.remove();
+        }
+    }
+    if (this->files.isEmpty() && this->directories.isEmpty()) {
+        locker.unlock();
+        stop();
+        wait();
+    }
+    return p;
+}
+
+void QPollingFileSystemWatcherEngine::stop()
+{
+    quit();
+}
+
+void QPollingFileSystemWatcherEngine::timeout()
+{
+    QMutexLocker locker(&mutex);
+    QMutableHashIterator<QString, FileInfo> fit(files);
+    while (fit.hasNext()) {
+        QHash<QString, FileInfo>::iterator x = fit.next();
+        QString path = x.key();
+        QFileInfo fi(path);
+        if (!fi.exists()) {
+            fit.remove();
+            emit fileChanged(path, true);
+        } else if (x.value() != fi) {
+            x.value() = fi;
+            emit fileChanged(path, false);
+        }
+    }
+    QMutableHashIterator<QString, FileInfo> dit(directories);
+    while (dit.hasNext()) {
+        QHash<QString, FileInfo>::iterator x = dit.next();
+        QString path = x.key();
+        QFileInfo fi(path);
+        if (!path.endsWith(QLatin1Char('/')))
+            fi = QFileInfo(path + QLatin1Char('/'));
+        if (!fi.exists()) {
+            dit.remove();
+            emit directoryChanged(path, true);
+        } else if (x.value() != fi) {
+            fi.refresh();
+            if (!fi.exists()) {
+                dit.remove();
+                emit directoryChanged(path, true);
+            } else {
+                x.value() = fi;
+                emit directoryChanged(path, false);
+            }
+        }
+    }
+}
+
+QT_END_NAMESPACE