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39
40#ifndef QFILESYSTEMWATCHER_POLLING_P_H
41#define QFILESYSTEMWATCHER_POLLING_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 <QtCore/qfileinfo.h>
55#include <QtCore/qmutex.h>
56#include <QtCore/qdatetime.h>
57#include <QtCore/qdir.h>
58#include <QtCore/qtimer.h>
59#include <QtCore/qhash.h>
60
61#include "qfilesystemwatcher_p.h"
62
63QT_REQUIRE_CONFIG(filesystemwatcher);
64QT_BEGIN_NAMESPACE
65
66enum { PollingInterval = 1000 };
67
68class QPollingFileSystemWatcherEngine : public QFileSystemWatcherEngine
69{
70 Q_OBJECT
71
72 class FileInfo
73 {
74 uint ownerId;
75 uint groupId;
76 QFile::Permissions permissions;
77 QDateTime lastModified;
78 QStringList entries;
79
80 public:
81 FileInfo(const QFileInfo &fileInfo)
82 : ownerId(fileInfo.ownerId()),
83 groupId(fileInfo.groupId()),
84 permissions(fileInfo.permissions()),
85 lastModified(fileInfo.lastModified())
86 {
87 if (fileInfo.isDir()) {
88 entries = fileInfo.absoluteDir().entryList(QDir::AllEntries);
89 }
90 }
91 FileInfo &operator=(const QFileInfo &fileInfo)
92 {
93 *this = FileInfo(fileInfo);
94 return *this;
95 }
96
97 bool operator!=(const QFileInfo &fileInfo) const
98 {
99 if (fileInfo.isDir() && entries != fileInfo.absoluteDir().entryList(QDir::AllEntries))
100 return true;
101 return (ownerId != fileInfo.ownerId()
102 || groupId != fileInfo.groupId()
103 || permissions != fileInfo.permissions()
104 || lastModified != fileInfo.lastModified());
105 }
106 };
107
108 QHash<QString, FileInfo> files, directories;
109
110public:
111 QPollingFileSystemWatcherEngine(QObject *parent);
112
113 QStringList addPaths(const QStringList &paths, QStringList *files, QStringList *directories) override;
114 QStringList removePaths(const QStringList &paths, QStringList *files, QStringList *directories) override;
115
116private Q_SLOTS:
117 void timeout();
118
119private:
120 QTimer timer;
121};
122
123QT_END_NAMESPACE
124#endif // QFILESYSTEMWATCHER_POLLING_P_H
125
126