| /**************************************************************************** |
| ** |
| ** Copyright (C) 2016 The Qt Company Ltd. |
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| ** This file is part of the QtCore module of the Qt Toolkit. |
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| ** GNU Lesser General Public License Usage |
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| ** |
| ** GNU General Public License Usage |
| ** Alternatively, this file may be used under the terms of the GNU |
| ** General Public License version 2.0 or (at your option) the GNU General |
| ** Public license version 3 or any later version approved by the KDE Free |
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| ****************************************************************************/ |
| |
| #include "qfilesystemwatcher_polling_p.h" |
| #include <QtCore/qscopeguard.h> |
| #include <QtCore/qtimer.h> |
| |
| QT_BEGIN_NAMESPACE |
| |
| QPollingFileSystemWatcherEngine::QPollingFileSystemWatcherEngine(QObject *parent) |
| : QFileSystemWatcherEngine(parent), |
| timer(this) |
| { |
| connect(&timer, SIGNAL(timeout()), SLOT(timeout())); |
| } |
| |
| QStringList QPollingFileSystemWatcherEngine::addPaths(const QStringList &paths, |
| QStringList *files, |
| QStringList *directories) |
| { |
| QStringList unhandled; |
| for (const QString &path : paths) { |
| auto sg = qScopeGuard([&]{ unhandled.push_back(path); }); |
| QFileInfo fi(path); |
| if (!fi.exists()) |
| continue; |
| if (fi.isDir()) { |
| if (directories->contains(path)) |
| continue; |
| directories->append(path); |
| if (!path.endsWith(QLatin1Char('/'))) |
| fi = QFileInfo(path + QLatin1Char('/')); |
| this->directories.insert(path, fi); |
| } else { |
| if (files->contains(path)) |
| continue; |
| files->append(path); |
| this->files.insert(path, fi); |
| } |
| sg.dismiss(); |
| } |
| |
| if ((!this->files.isEmpty() || |
| !this->directories.isEmpty()) && |
| !timer.isActive()) { |
| timer.start(PollingInterval); |
| } |
| |
| return unhandled; |
| } |
| |
| QStringList QPollingFileSystemWatcherEngine::removePaths(const QStringList &paths, |
| QStringList *files, |
| QStringList *directories) |
| { |
| QStringList unhandled; |
| for (const QString &path : paths) { |
| if (this->directories.remove(path)) { |
| directories->removeAll(path); |
| } else if (this->files.remove(path)) { |
| files->removeAll(path); |
| } else { |
| unhandled.push_back(path); |
| } |
| } |
| |
| if (this->files.isEmpty() && |
| this->directories.isEmpty()) { |
| timer.stop(); |
| } |
| |
| return unhandled; |
| } |
| |
| void QPollingFileSystemWatcherEngine::timeout() |
| { |
| for (auto it = files.begin(), end = files.end(); it != end; /*erasing*/) { |
| auto x = it++; |
| QString path = x.key(); |
| QFileInfo fi(path); |
| if (!fi.exists()) { |
| files.erase(x); |
| emit fileChanged(path, true); |
| } else if (x.value() != fi) { |
| x.value() = fi; |
| emit fileChanged(path, false); |
| } |
| } |
| |
| for (auto it = directories.begin(), end = directories.end(); it != end; /*erasing*/) { |
| auto x = it++; |
| QString path = x.key(); |
| QFileInfo fi(path); |
| if (!path.endsWith(QLatin1Char('/'))) |
| fi = QFileInfo(path + QLatin1Char('/')); |
| if (!fi.exists()) { |
| directories.erase(x); |
| emit directoryChanged(path, true); |
| } else if (x.value() != fi) { |
| fi.refresh(); |
| if (!fi.exists()) { |
| directories.erase(x); |
| emit directoryChanged(path, true); |
| } else { |
| x.value() = fi; |
| emit directoryChanged(path, false); |
| } |
| } |
| } |
| } |
| |
| QT_END_NAMESPACE |
| |
| #include "moc_qfilesystemwatcher_polling_p.cpp" |