qfileinfogatherer.cpp

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1/****************************************************************************-
2**-
3** Copyright (C) 2015 The Qt Company Ltd.-
4** Contact: http://www.qt.io/licensing/-
5**-
6** This file is part of the QtWidgets module of the Qt Toolkit.-
7**-
8** $QT_BEGIN_LICENSE:LGPL21$-
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 http://www.qt.io/terms-conditions. For further-
15** information use the contact form at http://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 2.1 or version 3 as published by the Free-
20** Software Foundation and appearing in the file LICENSE.LGPLv21 and-
21** LICENSE.LGPLv3 included in the packaging of this file. Please review the-
22** following information to ensure the GNU Lesser General Public License-
23** requirements will be met: https://www.gnu.org/licenses/lgpl.html and-
24** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.-
25**-
26** As a special exception, The Qt Company gives you certain additional-
27** rights. These rights are described in The Qt Company LGPL Exception-
28** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.-
29**-
30** $QT_END_LICENSE$-
31**-
32****************************************************************************/-
33-
34#include "qfileinfogatherer_p.h"-
35#include <qdebug.h>-
36#include <qdiriterator.h>-
37#ifndef Q_OS_WIN-
38# include <unistd.h>-
39# include <sys/types.h>-
40#endif-
41#if defined(Q_OS_VXWORKS)-
42# include "qplatformdefs.h"-
43#endif-
44-
45QT_BEGIN_NAMESPACE-
46-
47#ifndef QT_NO_FILESYSTEMMODEL-
48-
49#ifdef QT_BUILD_INTERNAL-
50static QBasicAtomicInt fetchedRoot = Q_BASIC_ATOMIC_INITIALIZER(false);-
51Q_AUTOTEST_EXPORT void qt_test_resetFetchedRoot()-
52{-
53 fetchedRoot.store(false);-
54}
never executed: end of block
0
55-
56Q_AUTOTEST_EXPORT bool qt_test_isFetchedRoot()-
57{-
58 return fetchedRoot.load();
never executed: return fetchedRoot.load();
0
59}-
60#endif-
61-
62/*!-
63 Creates thread-
64*/-
65QFileInfoGatherer::QFileInfoGatherer(QObject *parent)-
66 : QThread(parent), abort(false),-
67#ifndef QT_NO_FILESYSTEMWATCHER-
68 watcher(0),-
69#endif-
70#ifdef Q_OS_WIN-
71 m_resolveSymlinks(true),-
72#endif-
73 m_iconProvider(&defaultProvider)-
74{-
75#ifndef QT_NO_FILESYSTEMWATCHER-
76 watcher = new QFileSystemWatcher(this);-
77 connect(watcher, SIGNAL(directoryChanged(QString)), this, SLOT(list(QString)));-
78 connect(watcher, SIGNAL(fileChanged(QString)), this, SLOT(updateFile(QString)));-
79#endif-
80 start(LowPriority);-
81}
never executed: end of block
0
82-
83/*!-
84 Destroys thread-
85*/-
86QFileInfoGatherer::~QFileInfoGatherer()-
87{-
88 abort.store(true);-
89 QMutexLocker locker(&mutex);-
90 condition.wakeAll();-
91 locker.unlock();-
92 wait();-
93}
never executed: end of block
0
94-
95void QFileInfoGatherer::setResolveSymlinks(bool enable)-
96{-
97 Q_UNUSED(enable);-
98#ifdef Q_OS_WIN-
99 m_resolveSymlinks = enable;-
100#endif-
101}
never executed: end of block
0
102-
103bool QFileInfoGatherer::resolveSymlinks() const-
104{-
105#ifdef Q_OS_WIN-
106 return m_resolveSymlinks;-
107#else-
108 return false;
never executed: return false;
0
109#endif-
110}-
111-
112void QFileInfoGatherer::setIconProvider(QFileIconProvider *provider)-
113{-
114 m_iconProvider = provider;-
115}
never executed: end of block
0
116-
117QFileIconProvider *QFileInfoGatherer::iconProvider() const-
118{-
119 return m_iconProvider;
never executed: return m_iconProvider;
0
120}-
121-
122/*!-
123 Fetch extended information for all \a files in \a path-
124-
125 \sa updateFile(), update(), resolvedName()-
126*/-
127void QFileInfoGatherer::fetchExtendedInformation(const QString &path, const QStringList &files)-
128{-
129 QMutexLocker locker(&mutex);-
130 // See if we already have this dir/file in our queue-
131 int loc = this->path.lastIndexOf(path);-
132 while (loc > 0) {
loc > 0Description
TRUEnever evaluated
FALSEnever evaluated
0
133 if (this->files.at(loc) == files) {
this->files.at(loc) == filesDescription
TRUEnever evaluated
FALSEnever evaluated
0
134 return;
never executed: return;
0
135 }-
136 loc = this->path.lastIndexOf(path, loc - 1);-
137 }
never executed: end of block
0
138 this->path.push(path);-
139 this->files.push(files);-
140 condition.wakeAll();-
141-
142#ifndef QT_NO_FILESYSTEMWATCHER-
143 if (files.isEmpty()
files.isEmpty()Description
TRUEnever evaluated
FALSEnever evaluated
0
144 && !path.isEmpty()
!path.isEmpty()Description
TRUEnever evaluated
FALSEnever evaluated
0
145 && !path.startsWith(QLatin1String("//")) /*don't watch UNC path*/) {
!path.startsWi...1String("//"))Description
TRUEnever evaluated
FALSEnever evaluated
0
146 if (!watcher->directories().contains(path))
!watcher->dire...contains(path)Description
TRUEnever evaluated
FALSEnever evaluated
0
147 watcher->addPath(path);
never executed: watcher->addPath(path);
0
148 }
never executed: end of block
0
149#endif-
150}
never executed: end of block
0
151-
152/*!-
153 Fetch extended information for all \a filePath-
154-
155 \sa fetchExtendedInformation()-
156*/-
157void QFileInfoGatherer::updateFile(const QString &filePath)-
158{-
159 QString dir = filePath.mid(0, filePath.lastIndexOf(QDir::separator()));-
160 QString fileName = filePath.mid(dir.length() + 1);-
161 fetchExtendedInformation(dir, QStringList(fileName));-
162}
never executed: end of block
0
163-
164/*-
165 List all files in \a directoryPath-
166-
167 \sa listed()-
168*/-
169void QFileInfoGatherer::clear()-
170{-
171#ifndef QT_NO_FILESYSTEMWATCHER-
172 QMutexLocker locker(&mutex);-
173 watcher->removePaths(watcher->files());-
174 watcher->removePaths(watcher->directories());-
175#endif-
176}
never executed: end of block
0
177-
178/*-
179 Remove a \a path from the watcher-
180-
181 \sa listed()-
182*/-
183void QFileInfoGatherer::removePath(const QString &path)-
184{-
185#ifndef QT_NO_FILESYSTEMWATCHER-
186 QMutexLocker locker(&mutex);-
187 watcher->removePath(path);-
188#else-
189 Q_UNUSED(path);-
190#endif-
191}
never executed: end of block
0
192-
193/*-
194 List all files in \a directoryPath-
195-
196 \sa listed()-
197*/-
198void QFileInfoGatherer::list(const QString &directoryPath)-
199{-
200 fetchExtendedInformation(directoryPath, QStringList());-
201}
never executed: end of block
0
202-
203/*-
204 Until aborted wait to fetch a directory or files-
205*/-
206void QFileInfoGatherer::run()-
207{-
208 forever {-
209 QMutexLocker locker(&mutex);-
210 while (!abort.load() && path.isEmpty())
!abort.load()Description
TRUEnever evaluated
FALSEnever evaluated
path.isEmpty()Description
TRUEnever evaluated
FALSEnever evaluated
0
211 condition.wait(&mutex);
never executed: condition.wait(&mutex);
0
212 if (abort.load())
abort.load()Description
TRUEnever evaluated
FALSEnever evaluated
0
213 return;
never executed: return;
0
214 const QString thisPath = path.front();-
215 path.pop_front();-
216 const QStringList thisList = files.front();-
217 files.pop_front();-
218 locker.unlock();-
219-
220 getFileInfos(thisPath, thisList);-
221 }
never executed: end of block
0
222}
never executed: end of block
0
223-
224QExtendedInformation QFileInfoGatherer::getInfo(const QFileInfo &fileInfo) const-
225{-
226 QExtendedInformation info(fileInfo);-
227 info.icon = m_iconProvider->icon(fileInfo);-
228 info.displayType = m_iconProvider->type(fileInfo);-
229#ifndef QT_NO_FILESYSTEMWATCHER-
230 // ### Not ready to listen all modifications-
231 #if 0-
232 // Enable the next two commented out lines to get updates when the file sizes change...-
233 if (!fileInfo.exists() && !fileInfo.isSymLink()) {-
234 info.size = -1;-
235 //watcher->removePath(fileInfo.absoluteFilePath());-
236 } else {-
237 if (!fileInfo.absoluteFilePath().isEmpty() && fileInfo.exists() && fileInfo.isReadable()-
238 && !watcher->files().contains(fileInfo.absoluteFilePath())) {-
239 //watcher->addPath(fileInfo.absoluteFilePath());-
240 }-
241 }-
242 #endif-
243#endif-
244-
245#ifdef Q_OS_WIN-
246 if (m_resolveSymlinks && info.isSymLink(/* ignoreNtfsSymLinks = */ true)) {-
247 QFileInfo resolvedInfo(fileInfo.symLinkTarget());-
248 resolvedInfo = resolvedInfo.canonicalFilePath();-
249 if (resolvedInfo.exists()) {-
250 emit nameResolved(fileInfo.filePath(), resolvedInfo.fileName());-
251 }-
252 }-
253#endif-
254 return info;
never executed: return info;
0
255}-
256-
257static QString translateDriveName(const QFileInfo &drive)-
258{-
259 QString driveName = drive.absoluteFilePath();-
260#if defined(Q_OS_WIN) && !defined(Q_OS_WINCE)-
261 if (driveName.startsWith(QLatin1Char('/'))) // UNC host-
262 return drive.fileName();-
263 if (driveName.endsWith(QLatin1Char('/')))-
264 driveName.chop(1);-
265#endif-
266 return driveName;
never executed: return driveName;
0
267}-
268-
269/*-
270 Get specific file info's, batch the files so update when we have 100-
271 items and every 200ms after that-
272 */-
273void QFileInfoGatherer::getFileInfos(const QString &path, const QStringList &files)-
274{-
275 // List drives-
276 if (path.isEmpty()) {
path.isEmpty()Description
TRUEnever evaluated
FALSEnever evaluated
0
277#ifdef QT_BUILD_INTERNAL-
278 fetchedRoot.store(true);-
279#endif-
280 QFileInfoList infoList;-
281 if (files.isEmpty()) {
files.isEmpty()Description
TRUEnever evaluated
FALSEnever evaluated
0
282 infoList = QDir::drives();-
283 } else {
never executed: end of block
0
284 infoList.reserve(files.count());-
285 for (int i = 0; i < files.count(); ++i)
i < files.count()Description
TRUEnever evaluated
FALSEnever evaluated
0
286 infoList << QFileInfo(files.at(i));
never executed: infoList << QFileInfo(files.at(i));
0
287 }
never executed: end of block
0
288 for (int i = infoList.count() - 1; i >= 0; --i) {
i >= 0Description
TRUEnever evaluated
FALSEnever evaluated
0
289 QString driveName = translateDriveName(infoList.at(i));-
290 QVector<QPair<QString,QFileInfo> > updatedFiles;-
291 updatedFiles.append(QPair<QString,QFileInfo>(driveName, infoList.at(i)));-
292 emit updates(path, updatedFiles);-
293 }
never executed: end of block
0
294 return;
never executed: return;
0
295 }-
296-
297 QElapsedTimer base;-
298 base.start();-
299 QFileInfo fileInfo;-
300 bool firstTime = true;-
301 QVector<QPair<QString, QFileInfo> > updatedFiles;-
302 QStringList filesToCheck = files;-
303-
304 QString itPath = QDir::fromNativeSeparators(files.isEmpty() ? path : QLatin1String(""));-
305 QDirIterator dirIt(itPath, QDir::AllEntries | QDir::System | QDir::Hidden);-
306 QStringList allFiles;-
307 while (!abort.load() && dirIt.hasNext()) {
!abort.load()Description
TRUEnever evaluated
FALSEnever evaluated
dirIt.hasNext()Description
TRUEnever evaluated
FALSEnever evaluated
0
308 dirIt.next();-
309 fileInfo = dirIt.fileInfo();-
310 allFiles.append(fileInfo.fileName());-
311 fetch(fileInfo, base, firstTime, updatedFiles, path);-
312 }
never executed: end of block
0
313 if (!allFiles.isEmpty())
!allFiles.isEmpty()Description
TRUEnever evaluated
FALSEnever evaluated
0
314 emit newListOfFiles(path, allFiles);
never executed: newListOfFiles(path, allFiles);
0
315-
316 QStringList::const_iterator filesIt = filesToCheck.constBegin();-
317 while (!abort.load() && filesIt != filesToCheck.constEnd()) {
!abort.load()Description
TRUEnever evaluated
FALSEnever evaluated
filesIt != fil...eck.constEnd()Description
TRUEnever evaluated
FALSEnever evaluated
0
318 fileInfo.setFile(path + QDir::separator() + *filesIt);-
319 ++filesIt;-
320 fetch(fileInfo, base, firstTime, updatedFiles, path);-
321 }
never executed: end of block
0
322 if (!updatedFiles.isEmpty())
!updatedFiles.isEmpty()Description
TRUEnever evaluated
FALSEnever evaluated
0
323 emit updates(path, updatedFiles);
never executed: updates(path, updatedFiles);
0
324 emit directoryLoaded(path);-
325}
never executed: end of block
0
326-
327void QFileInfoGatherer::fetch(const QFileInfo &fileInfo, QElapsedTimer &base, bool &firstTime, QVector<QPair<QString, QFileInfo> > &updatedFiles, const QString &path) {-
328 updatedFiles.append(QPair<QString, QFileInfo>(fileInfo.fileName(), fileInfo));-
329 QElapsedTimer current;-
330 current.start();-
331 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
332 emit updates(path, updatedFiles);-
333 updatedFiles.clear();-
334 base = current;-
335 firstTime = false;-
336 }
never executed: end of block
0
337}
never executed: end of block
0
338-
339#endif // QT_NO_FILESYSTEMMODEL-
340-
341QT_END_NAMESPACE-
342-
343#include "moc_qfileinfogatherer_p.cpp"-
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