1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
|
// Copyright (C) 2016 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
#include "qfilesystemwatcher_polling_p.h"
#include <QtCore/qlatin1stringview.h>
#include <QtCore/qscopeguard.h>
#include <QtCore/qtimer.h>
#include <chrono>
using namespace std::chrono_literals;
QT_BEGIN_NAMESPACE
using namespace Qt::StringLiterals;
static constexpr auto PollingInterval = 1s;
QPollingFileSystemWatcherEngine::QPollingFileSystemWatcherEngine(QObject *parent)
: QFileSystemWatcherEngine(parent)
{
}
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(u'/'))
fi = QFileInfo(path + u'/');
this->directories.insert(path, fi);
} else {
if (files->contains(path))
continue;
files->append(path);
this->files.insert(path, fi);
}
sg.dismiss();
}
std::chrono::milliseconds interval = PollingInterval;
#ifdef QT_BUILD_INTERNAL
if (Q_UNLIKELY(parent()->objectName().startsWith("_qt_autotest_force_engine_"_L1))) {
interval = 10ms; // Special case to speed up the unittests
}
#endif
if ((!this->files.isEmpty() ||
!this->directories.isEmpty()) &&
!timer.isActive()) {
timer.start(interval, this);
}
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::timerEvent(QTimerEvent *e)
{
if (e->timerId() != timer.timerId())
return QFileSystemWatcherEngine::timerEvent(e);
for (auto it = files.begin(), end = files.end(); it != end; /*erasing*/) {
QString path = it.key();
QFileInfo fi(path);
if (!fi.exists()) {
it = files.erase(it);
emit fileChanged(path, true);
continue;
} else if (it.value() != fi) {
it.value() = fi;
emit fileChanged(path, false);
}
++it;
}
for (auto it = directories.begin(), end = directories.end(); it != end; /*erasing*/) {
QString path = it.key();
QFileInfo fi(path);
if (!path.endsWith(u'/'))
fi = QFileInfo(path + u'/');
if (!fi.exists()) {
it = directories.erase(it);
emit directoryChanged(path, true);
continue;
} else if (it.value() != fi) {
fi.refresh();
if (!fi.exists()) {
it = directories.erase(it);
emit directoryChanged(path, true);
continue;
} else {
it.value() = fi;
emit directoryChanged(path, false);
}
}
++it;
}
}
QT_END_NAMESPACE
#include "moc_qfilesystemwatcher_polling_p.cpp"
|
