qfileinfogatherer.cpp

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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 QtWidgets 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#include "qfileinfogatherer_p.h"-
41#include <qdebug.h>-
42#include <qdiriterator.h>-
43#ifndef Q_OS_WIN-
44# include <unistd.h>-
45# include <sys/types.h>-
46#endif-
47#if defined(Q_OS_VXWORKS)-
48# include "qplatformdefs.h"-
49#endif-
50-
51QT_BEGIN_NAMESPACE-
52-
53#ifndef QT_NO_FILESYSTEMMODEL-
54-
55#ifdef QT_BUILD_INTERNAL-
56static QBasicAtomicInt fetchedRoot = Q_BASIC_ATOMIC_INITIALIZER(false);-
57Q_AUTOTEST_EXPORT void qt_test_resetFetchedRoot()-
58{-
59 fetchedRoot.store(false);-
60}
never executed: end of block
0
61-
62Q_AUTOTEST_EXPORT bool qt_test_isFetchedRoot()-
63{-
64 return fetchedRoot.load();
never executed: return fetchedRoot.load();
0
65}-
66#endif-
67-
68/*!-
69 Creates thread-
70*/-
71QFileInfoGatherer::QFileInfoGatherer(QObject *parent)-
72 : QThread(parent), abort(false),-
73#ifndef QT_NO_FILESYSTEMWATCHER-
74 watcher(0),-
75#endif-
76#ifdef Q_OS_WIN-
77 m_resolveSymlinks(true),-
78#endif-
79 m_iconProvider(&defaultProvider)-
80{-
81#ifndef QT_NO_FILESYSTEMWATCHER-
82 watcher = new QFileSystemWatcher(this);-
83 connect(watcher, SIGNAL(directoryChanged(QString)), this, SLOT(list(QString)));-
84 connect(watcher, SIGNAL(fileChanged(QString)), this, SLOT(updateFile(QString)));-
85#endif-
86 start(LowPriority);-
87}
never executed: end of block
0
88-
89/*!-
90 Destroys thread-
91*/-
92QFileInfoGatherer::~QFileInfoGatherer()-
93{-
94 abort.store(true);-
95 QMutexLocker locker(&mutex);-
96 condition.wakeAll();-
97 locker.unlock();-
98 wait();-
99}
never executed: end of block
0
100-
101void QFileInfoGatherer::setResolveSymlinks(bool enable)-
102{-
103 Q_UNUSED(enable);-
104#ifdef Q_OS_WIN-
105 m_resolveSymlinks = enable;-
106#endif-
107}
never executed: end of block
0
108-
109bool QFileInfoGatherer::resolveSymlinks() const-
110{-
111#ifdef Q_OS_WIN-
112 return m_resolveSymlinks;-
113#else-
114 return false;
never executed: return false;
0
115#endif-
116}-
117-
118void QFileInfoGatherer::setIconProvider(QFileIconProvider *provider)-
119{-
120 m_iconProvider = provider;-
121}
never executed: end of block
0
122-
123QFileIconProvider *QFileInfoGatherer::iconProvider() const-
124{-
125 return m_iconProvider;
never executed: return m_iconProvider;
0
126}-
127-
128/*!-
129 Fetch extended information for all \a files in \a path-
130-
131 \sa updateFile(), update(), resolvedName()-
132*/-
133void QFileInfoGatherer::fetchExtendedInformation(const QString &path, const QStringList &files)-
134{-
135 QMutexLocker locker(&mutex);-
136 // See if we already have this dir/file in our queue-
137 int loc = this->path.lastIndexOf(path);-
138 while (loc > 0) {
loc > 0Description
TRUEnever evaluated
FALSEnever evaluated
0
139 if (this->files.at(loc) == files) {
this->files.at(loc) == filesDescription
TRUEnever evaluated
FALSEnever evaluated
0
140 return;
never executed: return;
0
141 }-
142 loc = this->path.lastIndexOf(path, loc - 1);-
143 }
never executed: end of block
0
144 this->path.push(path);-
145 this->files.push(files);-
146 condition.wakeAll();-
147-
148#ifndef QT_NO_FILESYSTEMWATCHER-
149 if (files.isEmpty()
files.isEmpty()Description
TRUEnever evaluated
FALSEnever evaluated
0
150 && !path.isEmpty()
!path.isEmpty()Description
TRUEnever evaluated
FALSEnever evaluated
0
151 && !path.startsWith(QLatin1String("//")) /*don't watch UNC path*/) {
!path.startsWi...1String("//"))Description
TRUEnever evaluated
FALSEnever evaluated
0
152 if (!watcher->directories().contains(path))
!watcher->dire...contains(path)Description
TRUEnever evaluated
FALSEnever evaluated
0
153 watcher->addPath(path);
never executed: watcher->addPath(path);
0
154 }
never executed: end of block
0
155#endif-
156}
never executed: end of block
0
157-
158/*!-
159 Fetch extended information for all \a filePath-
160-
161 \sa fetchExtendedInformation()-
162*/-
163void QFileInfoGatherer::updateFile(const QString &filePath)-
164{-
165 QString dir = filePath.mid(0, filePath.lastIndexOf(QDir::separator()));-
166 QString fileName = filePath.mid(dir.length() + 1);-
167 fetchExtendedInformation(dir, QStringList(fileName));-
168}
never executed: end of block
0
169-
170/*-
171 List all files in \a directoryPath-
172-
173 \sa listed()-
174*/-
175void QFileInfoGatherer::clear()-
176{-
177#ifndef QT_NO_FILESYSTEMWATCHER-
178 QMutexLocker locker(&mutex);-
179 watcher->removePaths(watcher->files());-
180 watcher->removePaths(watcher->directories());-
181#endif-
182}
never executed: end of block
0
183-
184/*-
185 Remove a \a path from the watcher-
186-
187 \sa listed()-
188*/-
189void QFileInfoGatherer::removePath(const QString &path)-
190{-
191#ifndef QT_NO_FILESYSTEMWATCHER-
192 QMutexLocker locker(&mutex);-
193 watcher->removePath(path);-
194#else-
195 Q_UNUSED(path);-
196#endif-
197}
never executed: end of block
0
198-
199/*-
200 List all files in \a directoryPath-
201-
202 \sa listed()-
203*/-
204void QFileInfoGatherer::list(const QString &directoryPath)-
205{-
206 fetchExtendedInformation(directoryPath, QStringList());-
207}
never executed: end of block
0
208-
209/*-
210 Until aborted wait to fetch a directory or files-
211*/-
212void QFileInfoGatherer::run()-
213{-
214 forever {-
215 QMutexLocker locker(&mutex);-
216 while (!abort.load() && path.isEmpty())
!abort.load()Description
TRUEnever evaluated
FALSEnever evaluated
path.isEmpty()Description
TRUEnever evaluated
FALSEnever evaluated
0
217 condition.wait(&mutex);
never executed: condition.wait(&mutex);
0
218 if (abort.load())
abort.load()Description
TRUEnever evaluated
FALSEnever evaluated
0
219 return;
never executed: return;
0
220 const QString thisPath = qAsConst(path).front();-
221 path.pop_front();-
222 const QStringList thisList = qAsConst(files).front();-
223 files.pop_front();-
224 locker.unlock();-
225-
226 getFileInfos(thisPath, thisList);-
227 }
never executed: end of block
0
228}
never executed: end of block
0
229-
230QExtendedInformation QFileInfoGatherer::getInfo(const QFileInfo &fileInfo) const-
231{-
232 QExtendedInformation info(fileInfo);-
233 info.icon = m_iconProvider->icon(fileInfo);-
234 info.displayType = m_iconProvider->type(fileInfo);-
235#ifndef QT_NO_FILESYSTEMWATCHER-
236 // ### Not ready to listen all modifications-
237 #if 0-
238 // Enable the next two commented out lines to get updates when the file sizes change...-
239 if (!fileInfo.exists() && !fileInfo.isSymLink()) {-
240 info.size = -1;-
241 //watcher->removePath(fileInfo.absoluteFilePath());-
242 } else {-
243 if (!fileInfo.absoluteFilePath().isEmpty() && fileInfo.exists() && fileInfo.isReadable()-
244 && !watcher->files().contains(fileInfo.absoluteFilePath())) {-
245 //watcher->addPath(fileInfo.absoluteFilePath());-
246 }-
247 }-
248 #endif-
249#endif-
250-
251#ifdef Q_OS_WIN-
252 if (m_resolveSymlinks && info.isSymLink(/* ignoreNtfsSymLinks = */ true)) {-
253 QFileInfo resolvedInfo(fileInfo.symLinkTarget());-
254 resolvedInfo = resolvedInfo.canonicalFilePath();-
255 if (resolvedInfo.exists()) {-
256 emit nameResolved(fileInfo.filePath(), resolvedInfo.fileName());-
257 }-
258 }-
259#endif-
260 return info;
never executed: return info;
0
261}-
262-
263static QString translateDriveName(const QFileInfo &drive)-
264{-
265 QString driveName = drive.absoluteFilePath();-
266#if defined(Q_OS_WIN) && !defined(Q_OS_WINCE)-
267 if (driveName.startsWith(QLatin1Char('/'))) // UNC host-
268 return drive.fileName();-
269 if (driveName.endsWith(QLatin1Char('/')))-
270 driveName.chop(1);-
271#endif-
272 return driveName;
never executed: return driveName;
0
273}-
274-
275/*-
276 Get specific file info's, batch the files so update when we have 100-
277 items and every 200ms after that-
278 */-
279void QFileInfoGatherer::getFileInfos(const QString &path, const QStringList &files)-
280{-
281 // List drives-
282 if (path.isEmpty()) {
path.isEmpty()Description
TRUEnever evaluated
FALSEnever evaluated
0
283#ifdef QT_BUILD_INTERNAL-
284 fetchedRoot.store(true);-
285#endif-
286 QFileInfoList infoList;-
287 if (files.isEmpty()) {
files.isEmpty()Description
TRUEnever evaluated
FALSEnever evaluated
0
288 infoList = QDir::drives();-
289 } else {
never executed: end of block
0
290 infoList.reserve(files.count());-
291 for (const auto &file : files)-
292 infoList << QFileInfo(file);
never executed: infoList << QFileInfo(file);
0
293 }
never executed: end of block
0
294 for (int i = infoList.count() - 1; i >= 0; --i) {
i >= 0Description
TRUEnever evaluated
FALSEnever evaluated
0
295 QString driveName = translateDriveName(infoList.at(i));-
296 QVector<QPair<QString,QFileInfo> > updatedFiles;-
297 updatedFiles.append(QPair<QString,QFileInfo>(driveName, infoList.at(i)));-
298 emit updates(path, updatedFiles);-
299 }
never executed: end of block
0
300 return;
never executed: return;
0
301 }-
302-
303 QElapsedTimer base;-
304 base.start();-
305 QFileInfo fileInfo;-
306 bool firstTime = true;-
307 QVector<QPair<QString, QFileInfo> > updatedFiles;-
308 QStringList filesToCheck = files;-
309-
310 QString itPath = QDir::fromNativeSeparators(files.isEmpty() ? path : QLatin1String(""));-
311 QDirIterator dirIt(itPath, QDir::AllEntries | QDir::System | QDir::Hidden);-
312 QStringList allFiles;-
313 while (!abort.load() && dirIt.hasNext()) {
!abort.load()Description
TRUEnever evaluated
FALSEnever evaluated
dirIt.hasNext()Description
TRUEnever evaluated
FALSEnever evaluated
0
314 dirIt.next();-
315 fileInfo = dirIt.fileInfo();-
316 allFiles.append(fileInfo.fileName());-
317 fetch(fileInfo, base, firstTime, updatedFiles, path);-
318 }
never executed: end of block
0
319 if (!allFiles.isEmpty())
!allFiles.isEmpty()Description
TRUEnever evaluated
FALSEnever evaluated
0
320 emit newListOfFiles(path, allFiles);
never executed: newListOfFiles(path, allFiles);
0
321-
322 QStringList::const_iterator filesIt = filesToCheck.constBegin();-
323 while (!abort.load() && filesIt != filesToCheck.constEnd()) {
!abort.load()Description
TRUEnever evaluated
FALSEnever evaluated
filesIt != fil...eck.constEnd()Description
TRUEnever evaluated
FALSEnever evaluated
0
324 fileInfo.setFile(path + QDir::separator() + *filesIt);-
325 ++filesIt;-
326 fetch(fileInfo, base, firstTime, updatedFiles, path);-
327 }
never executed: end of block
0
328 if (!updatedFiles.isEmpty())
!updatedFiles.isEmpty()Description
TRUEnever evaluated
FALSEnever evaluated
0
329 emit updates(path, updatedFiles);
never executed: updates(path, updatedFiles);
0
330 emit directoryLoaded(path);-
331}
never executed: end of block
0
332-
333void QFileInfoGatherer::fetch(const QFileInfo &fileInfo, QElapsedTimer &base, bool &firstTime, QVector<QPair<QString, QFileInfo> > &updatedFiles, const QString &path) {-
334 updatedFiles.append(QPair<QString, QFileInfo>(fileInfo.fileName(), fileInfo));-
335 QElapsedTimer current;-
336 current.start();-
337 if ((firstTime && updatedFiles.count() > 100) || base.msecsTo(current) > 1000) {
firstTimeDescription
TRUEnever evaluated
FALSEnever evaluated
updatedFiles.count() > 100Description
TRUEnever evaluated
FALSEnever evaluated
base.msecsTo(current) > 1000Description
TRUEnever evaluated
FALSEnever evaluated
0
338 emit updates(path, updatedFiles);-
339 updatedFiles.clear();-
340 base = current;-
341 firstTime = false;-
342 }
never executed: end of block
0
343}
never executed: end of block
0
344-
345#endif // QT_NO_FILESYSTEMMODEL-
346-
347QT_END_NAMESPACE-
348-
349#include "moc_qfileinfogatherer_p.cpp"-
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