1/****************************************************************************
2**
3** Copyright (C) 2016 The Qt Company Ltd.
4** Contact: https://www.qt.io/licensing/
5**
6** This file is part of the QtCore module of the Qt Toolkit.
7**
8** $QT_BEGIN_LICENSE:LGPL$
9** Commercial License Usage
10** Licensees holding valid commercial Qt licenses may use this file in
11** accordance with the commercial license agreement provided with the
12** Software or, alternatively, in accordance with the terms contained in
13** a written agreement between you and The Qt Company. For licensing terms
14** and conditions see https://www.qt.io/terms-conditions. For further
15** information use the contact form at https://www.qt.io/contact-us.
16**
17** GNU Lesser General Public License Usage
18** Alternatively, this file may be used under the terms of the GNU Lesser
19** General Public License version 3 as published by the Free Software
20** Foundation and appearing in the file LICENSE.LGPL3 included in the
21** packaging of this file. Please review the following information to
22** ensure the GNU Lesser General Public License version 3 requirements
23** will be met: https://www.gnu.org/licenses/lgpl-3.0.html.
24**
25** GNU General Public License Usage
26** Alternatively, this file may be used under the terms of the GNU
27** General Public License version 2.0 or (at your option) the GNU General
28** Public license version 3 or any later version approved by the KDE Free
29** Qt Foundation. The licenses are as published by the Free Software
30** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3
31** included in the packaging of this file. Please review the following
32** information to ensure the GNU General Public License requirements will
33** be met: https://www.gnu.org/licenses/gpl-2.0.html and
34** https://www.gnu.org/licenses/gpl-3.0.html.
35**
36** $QT_END_LICENSE$
37**
38****************************************************************************/
39
40#ifndef QFILESYSTEMWATCHER_P_H
41#define QFILESYSTEMWATCHER_P_H
42
43//
44// W A R N I N G
45// -------------
46//
47// This file is not part of the Qt API. It exists purely as an
48// implementation detail. This header file may change from version to
49// version without notice, or even be removed.
50//
51// We mean it.
52//
53
54#include "qfilesystemwatcher.h"
55
56QT_REQUIRE_CONFIG(filesystemwatcher);
57
58#include <private/qobject_p.h>
59
60#include <QtCore/qstringlist.h>
61#include <QtCore/qhash.h>
62
63QT_BEGIN_NAMESPACE
64
65class QFileSystemWatcherEngine : public QObject
66{
67 Q_OBJECT
68
69protected:
70 inline QFileSystemWatcherEngine(QObject *parent)
71 : QObject(parent)
72 {
73 }
74
75public:
76 // fills \a files and \a directories with the \a paths it could
77 // watch, and returns a list of paths this engine could not watch
78 virtual QStringList addPaths(const QStringList &paths,
79 QStringList *files,
80 QStringList *directories) = 0;
81 // removes \a paths from \a files and \a directories, and returns
82 // a list of paths this engine does not know about (either addPath
83 // failed or wasn't called)
84 virtual QStringList removePaths(const QStringList &paths,
85 QStringList *files,
86 QStringList *directories) = 0;
87
88Q_SIGNALS:
89 void fileChanged(const QString &path, bool removed);
90 void directoryChanged(const QString &path, bool removed);
91};
92
93class QFileSystemWatcherPrivate : public QObjectPrivate
94{
95 Q_DECLARE_PUBLIC(QFileSystemWatcher)
96
97 static QFileSystemWatcherEngine *createNativeEngine(QObject *parent);
98
99public:
100 QFileSystemWatcherPrivate();
101 void init();
102 void initPollerEngine();
103
104 QFileSystemWatcherEngine *native, *poller;
105 QStringList files, directories;
106
107 // private slots
108 void _q_fileChanged(const QString &path, bool removed);
109 void _q_directoryChanged(const QString &path, bool removed);
110
111#if defined(Q_OS_WIN) && !defined(Q_OS_WINRT)
112 void _q_winDriveLockForRemoval(const QString &);
113 void _q_winDriveLockForRemovalFailed(const QString &);
114 void _q_winDriveRemoved(const QString &);
115
116private:
117 QHash<QChar, QStringList> temporarilyRemovedPaths;
118#endif // Q_OS_WIN && !Q_OS_WINRT
119};
120
121
122QT_END_NAMESPACE
123#endif // QFILESYSTEMWATCHER_P_H
124

source code of qtbase/src/corelib/io/qfilesystemwatcher_p.h