qfileinfogatherer.cpp

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1 /**************************************************************************** -

2 ** -

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 -

51 QT_BEGIN_NAMESPACE -

52 -

53 #ifndef QT_NO_FILESYSTEMMODEL -

54 -

55 #ifdef QT_BUILD_INTERNAL -

56 static QBasicAtomicInt fetchedRoot = Q_BASIC_ATOMIC_INITIALIZER(false); -

57 Q_AUTOTEST_EXPORT void qt_test_resetFetchedRoot() -

58 { -

59 fetchedRoot.store(false); -

60 } -

61 -

62 Q_AUTOTEST_EXPORT bool qt_test_isFetchedRoot() -

63 { -

64 return fetchedRoot.load(); -

65 } -

66 #endif -

67 -

68 /*! -

69 Creates thread -

70 */ -

71 QFileInfoGatherer::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 } -

88 -

89 /*! -

90 Destroys thread -

91 */ -

92 QFileInfoGatherer::~QFileInfoGatherer() -

93 { -

94 abort.store(true); -

95 QMutexLocker locker(&mutex); -

96 condition.wakeAll(); -

97 locker.unlock(); -

98 wait(); -

99 } -

100 -

101 void QFileInfoGatherer::setResolveSymlinks(bool enable) -

102 { -

103 Q_UNUSED(enable); -

104 #ifdef Q_OS_WIN -

105 m_resolveSymlinks = enable; -

106 #endif -

107 } -

108 -

109 bool QFileInfoGatherer::resolveSymlinks() const -

110 { -

111 #ifdef Q_OS_WIN -

112 return m_resolveSymlinks; -

113 #else -

114 return false; -

115 #endif -

116 } -

117 -

118 void QFileInfoGatherer::setIconProvider(QFileIconProvider *provider) -

119 { -

120 m_iconProvider = provider; -

121 } -

122 -

123 QFileIconProvider *QFileInfoGatherer::iconProvider() const -

124 { -

125 return m_iconProvider; -

126 } -

127 -

128 /*! -

129 Fetch extended information for all \a files in \a path -

130 -

131 \sa updateFile(), update(), resolvedName() -

132 */ -

133 void 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) { -

139 if (this->files.at(loc) == files) { -

140 return; -

141 } -

142 loc = this->path.lastIndexOf(path, loc - 1); -

143 } -

144 this->path.push(path); -

145 this->files.push(files); -

146 condition.wakeAll(); -

147 -

148 #ifndef QT_NO_FILESYSTEMWATCHER -

149 if (files.isEmpty() -

150 && !path.isEmpty() -

151 && !path.startsWith(QLatin1String("//")) /*don't watch UNC path*/) { -

152 if (!watcher->directories().contains(path)) -

153 watcher->addPath(path); -

154 } -

155 #endif -

156 } -

157 -

158 /*! -

159 Fetch extended information for all \a filePath -

160 -

161 \sa fetchExtendedInformation() -

162 */ -

163 void 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 } -

169 -

170 /* -

171 List all files in \a directoryPath -

172 -

173 \sa listed() -

174 */ -

175 void 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 } -

183 -

184 /* -

185 Remove a \a path from the watcher -

186 -

187 \sa listed() -

188 */ -

189 void 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 } -

198 -

199 /* -

200 List all files in \a directoryPath -

201 -

202 \sa listed() -

203 */ -

204 void QFileInfoGatherer::list(const QString &directoryPath) -

205 { -

206 fetchExtendedInformation(directoryPath, QStringList()); -

207 } -

208 -

209 /* -

210 Until aborted wait to fetch a directory or files -

211 */ -

212 void QFileInfoGatherer::run() -

213 { -

214 forever { -

215 QMutexLocker locker(&mutex); -

216

while (!abort.load() && path.isEmpty())

!abort.load()	Description
TRUE	never evaluated
FALSE	never evaluated

path.isEmpty()	Description
TRUE	never evaluated
FALSE	never evaluated

217

condition.wait(&mutex);

never executed: condition.wait(&mutex);

218

if (abort.load())

abort.load()	Description
TRUE	never evaluated
FALSE	never evaluated

219

return;

never executed: return;

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

228

}

never executed: end of block

229 -

230 QExtendedInformation 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; -

261 } -

262 -

263 static 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; -

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 */ -

279 void QFileInfoGatherer::getFileInfos(const QString &path, const QStringList &files) -

280 { -

281 // List drives -

282

if (path.isEmpty()) {

path.isEmpty()	Description
TRUE	never evaluated
FALSE	never evaluated

283 #ifdef QT_BUILD_INTERNAL -

284 fetchedRoot.store(true); -

285 #endif -

286 QFileInfoList infoList; -

287

if (files.isEmpty()) {

files.isEmpty()	Description
TRUE	never evaluated
FALSE	never evaluated

288 infoList = QDir::drives(); -

289

} else {

never executed: end of block

290 infoList.reserve(files.count()); -

291 for (int i = 0; i <const auto &file : files.count(); ++i) -

292

infoList << QFileInfo(files.at(i));file);

never executed: infoList << QFileInfo(file);

293

}

never executed: end of block

294

for (int i = infoList.count() - 1; i >= 0; --i) {

i >= 0	Description
TRUE	never evaluated
FALSE	never evaluated

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

300

return;

never executed: return;

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
TRUE	never evaluated
FALSE	never evaluated

dirIt.hasNext()	Description
TRUE	never evaluated
FALSE	never evaluated

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

319

if (!allFiles.isEmpty())

!allFiles.isEmpty()	Description
TRUE	never evaluated
FALSE	never evaluated

320

emit newListOfFiles(path, allFiles);

never executed: newListOfFiles(path, allFiles);

321 -

322 QStringList::const_iterator filesIt = filesToCheck.constBegin(); -

323

while (!abort.load() && filesIt != filesToCheck.constEnd()) {

!abort.load()	Description
TRUE	never evaluated
FALSE	never evaluated

filesIt != fil...eck.constEnd()	Description
TRUE	never evaluated
FALSE	never evaluated

324 fileInfo.setFile(path + QDir::separator() + *filesIt); -

325 ++filesIt; -

326 fetch(fileInfo, base, firstTime, updatedFiles, path); -

327

}

never executed: end of block

328

if (!updatedFiles.isEmpty())

!updatedFiles.isEmpty()	Description
TRUE	never evaluated
FALSE	never evaluated

329

emit updates(path, updatedFiles);

never executed: updates(path, updatedFiles);

330 emit directoryLoaded(path); -

331

}

never executed: end of block

332 -

333 void 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) { -

338 emit updates(path, updatedFiles); -

339 updatedFiles.clear(); -

340 base = current; -

341 firstTime = false; -

342 } -

343 } -

344 -

345 #endif // QT_NO_FILESYSTEMMODEL -

346 -

347 QT_END_NAMESPACE -

348 -

349 #include "moc_qfileinfogatherer_p.cpp" -

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