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QFileSystemModel: use the QFileInfo from the model as much as possible

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If the file system already stores a QFileInfo, then it will have the
information cached, which avoids costly roundtrips to the file system.

Task-number: QTBUG-41373
Change-Id: I830a39fe0e20ebf07abde4438a87f7572f608d66
Reviewed-by: Richard Moe Gustavsen <richard.gustavsen@qt.io>
Reviewed-by: Mårten Nordheim <marten.nordheim@qt.io>
This commit is contained in:
Volker Hilsheimer 2020-07-29 20:16:48 +02:00
parent 99aefbb4c0
commit e635568985
1 changed files with 19 additions and 9 deletions
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28
src/widgets/dialogs/qfilesystemmodel.cpp
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@ -1393,8 +1393,14 @@ QString QFileSystemModel::filePath(const QModelIndex &index) const
#endif
&& d->resolvedSymLinks.contains(fullPath)
&& dirNode->isDir()) {
QFileInfo resolvedInfo(fullPath);
resolvedInfo = resolvedInfo.canonicalFilePath();
QFileInfo fullPathInfo(dirNode->fileInfo());
if (!dirNode->hasInformation())
fullPathInfo = QFileInfo(fullPath);
QString canonicalPath = fullPathInfo.canonicalFilePath();
auto *canonicalNode = d->node(fullPathInfo.canonicalFilePath(), false);
QFileInfo resolvedInfo = canonicalNode->fileInfo();
if (!canonicalNode->hasInformation())
resolvedInfo = QFileInfo(canonicalPath);
if (resolvedInfo.exists())
return resolvedInfo.filePath();
}
@ -1485,12 +1491,9 @@ QModelIndex QFileSystemModel::setRootPath(const QString &newPath)
#else
QString longNewPath = newPath;
#endif
QDir newPathDir(longNewPath);
//we remove .. and . from the given path if exist
if (!newPath.isEmpty()) {
if (!newPath.isEmpty())
longNewPath = QDir::cleanPath(longNewPath);
newPathDir.setPath(longNewPath);
}
d->setRootPath = true;
@ -1501,8 +1504,15 @@ QModelIndex QFileSystemModel::setRootPath(const QString &newPath)
if (d->rootDir.path() == longNewPath)
return d->index(rootPath());
auto node = d->node(longNewPath);
QFileInfo newPathInfo;
if (node && node->hasInformation())
newPathInfo = node->fileInfo();
else
newPathInfo = QFileInfo(longNewPath);
bool showDrives = (longNewPath.isEmpty() || longNewPath == QFileSystemModelPrivate::myComputer());
if (!showDrives && !newPathDir.exists())
if (!showDrives && !newPathInfo.exists())
return d->index(rootPath());
//We remove the watcher on the previous path
@ -1518,13 +1528,13 @@ QModelIndex QFileSystemModel::setRootPath(const QString &newPath)
}
// We have a new valid root path
d->rootDir = newPathDir;
d->rootDir = QDir(longNewPath);
QModelIndex newRootIndex;
if (showDrives) {
// otherwise dir will become '.'
d->rootDir.setPath(QLatin1String(""));
} else {
newRootIndex = d->index(newPathDir.path());
newRootIndex = d->index(d->rootDir.path());
}
fetchMore(newRootIndex);
emit rootPathChanged(longNewPath);