Long live Qt 4.5!

1 files changed, 365 insertions, 0 deletions

diff --git a/src/gui/dialogs/qfileinfogatherer.cpp b/src/gui/dialogs/qfileinfogatherer.cpp
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+++ b/src/gui/dialogs/qfileinfogatherer.cpp
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+/****************************************************************************
+**
+** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
+** Contact: Qt Software Information (qt-info@nokia.com)
+**
+** This file is part of the QtGui module of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** No Commercial Usage
+** This file contains pre-release code and may not be distributed.
+** You may use this file in accordance with the terms and conditions
+** contained in the either Technology Preview License Agreement or the
+** Beta Release License Agreement.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 2.1 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU Lesser General Public License version 2.1 requirements
+** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+**
+** In addition, as a special exception, Nokia gives you certain
+** additional rights. These rights are described in the Nokia Qt LGPL
+** Exception version 1.0, included in the file LGPL_EXCEPTION.txt in this
+** package.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 3.0 as published by the Free Software
+** Foundation and appearing in the file LICENSE.GPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU General Public License version 3.0 requirements will be
+** met: http://www.gnu.org/copyleft/gpl.html.
+**
+** If you are unsure which license is appropriate for your use, please
+** contact the sales department at qt-sales@nokia.com.
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include "qfileinfogatherer_p.h"
+#include <qdebug.h>
+#include <qfsfileengine.h>
+#include <qdiriterator.h>
+#ifndef Q_OS_WIN
+#include <unistd.h>
+#include <sys/types.h>
+#endif
+
+QT_BEGIN_NAMESPACE
+
+#ifndef QT_NO_FILESYSTEMMODEL
+
+bool QFileInfoGatherer::fetchedRoot = false;
+
+/*!
+    Creates thread
+*/
+QFileInfoGatherer::QFileInfoGatherer(QObject *parent)
+    : QThread(parent), abort(false),
+#ifndef QT_NO_FILESYSTEMWATCHER
+      watcher(0),
+#endif
+      m_resolveSymlinks(false), m_iconProvider(&defaultProvider)
+{
+#ifndef Q_OS_WIN
+    userId = getuid();
+    groupId = getgid();
+#else
+    m_resolveSymlinks = true;
+#endif
+#ifndef QT_NO_FILESYSTEMWATCHER
+    watcher = new QFileSystemWatcher(this);
+    connect(watcher, SIGNAL(directoryChanged(const QString &)), this, SLOT(list(const QString &)));
+    connect(watcher, SIGNAL(fileChanged(const QString &)), this, SLOT(updateFile(const QString &)));
+#endif
+    start(LowPriority);
+}
+
+/*!
+    Destroys thread
+*/
+QFileInfoGatherer::~QFileInfoGatherer()
+{
+    mutex.lock();
+    abort = true;
+    condition.wakeOne();
+    mutex.unlock();
+    wait();
+}
+
+void QFileInfoGatherer::setResolveSymlinks(bool enable)
+{
+    Q_UNUSED(enable);
+#ifdef Q_OS_WIN
+    mutex.lock();
+    m_resolveSymlinks = enable;
+    mutex.unlock();
+#endif
+}
+
+bool QFileInfoGatherer::resolveSymlinks() const
+{
+    return m_resolveSymlinks;
+}
+
+void QFileInfoGatherer::setIconProvider(QFileIconProvider *provider)
+{
+    mutex.lock();
+    m_iconProvider = provider;
+    mutex.unlock();
+}
+
+QFileIconProvider *QFileInfoGatherer::iconProvider() const
+{
+    return m_iconProvider;
+}
+
+/*!
+    Fetch extended information for all \a files in \a path
+
+    \sa updateFile(), update(), resolvedName()
+*/
+void QFileInfoGatherer::fetchExtendedInformation(const QString &path, const QStringList &files)
+{
+    mutex.lock();
+    // See if we already have this dir/file in our que
+    int loc = this->path.lastIndexOf(path);
+    while (loc > 0)  {
+        if (this->files.at(loc) == files) {
+            mutex.unlock();
+            return;
+        }
+        loc = this->path.lastIndexOf(path, loc - 1);
+    }
+    this->path.push(path);
+    this->files.push(files);
+    condition.wakeAll();
+    mutex.unlock();
+}
+
+/*!
+    Fetch extended information for all \a filePath
+
+    \sa fetchExtendedInformation()
+*/
+void QFileInfoGatherer::updateFile(const QString &filePath)
+{
+    QString dir = filePath.mid(0, filePath.lastIndexOf(QDir::separator()));
+    QString fileName = filePath.mid(dir.length() + 1);
+    fetchExtendedInformation(dir, QStringList(fileName));
+}
+
+/*
+    List all files in \a directoryPath
+
+    \sa listed()
+*/
+void QFileInfoGatherer::clear()
+{
+#ifndef QT_NO_FILESYSTEMWATCHER
+    mutex.lock();
+    watcher->removePaths(watcher->files());
+    watcher->removePaths(watcher->directories());
+    mutex.unlock();
+#endif
+}
+
+/*
+    List all files in \a directoryPath
+
+    \sa listed()
+*/
+void QFileInfoGatherer::list(const QString &directoryPath)
+{
+    fetchExtendedInformation(directoryPath, QStringList());
+}
+
+/*
+    Until aborted wait to fetch a directory or files
+*/
+void QFileInfoGatherer::run()
+{
+    forever {
+        bool updateFiles = false;
+        mutex.lock();
+        if (abort) {
+            mutex.unlock();
+            return;
+        }
+        if (this->path.isEmpty())
+            condition.wait(&mutex);
+        QString path;
+        QStringList list;
+        if (!this->path.isEmpty()) {
+            path = this->path.first();
+            list = this->files.first();
+            this->path.pop_front();
+            this->files.pop_front();
+            updateFiles = true;
+        }
+        mutex.unlock();
+        if (updateFiles) getFileInfos(path, list);
+    }
+}
+
+/*
+    QFileInfo::permissions is different depending upon your platform.
+
+    "normalize this" so they can mean the same to us.
+*/
+QFile::Permissions QFileInfoGatherer::translatePermissions(const QFileInfo &fileInfo) const {
+    QFile::Permissions permissions = fileInfo.permissions();
+#ifdef Q_OS_WIN
+    return permissions;
+#else
+    QFile::Permissions p = permissions;
+    p &= ~(QFile::ReadUser|QFile::WriteUser|QFile::ExeUser);
+    if (                                     permissions & QFile::ReadOther
+        || (fileInfo.ownerId() == userId  && permissions & QFile::ReadOwner)
+        || (fileInfo.groupId() == groupId && permissions & QFile::ReadGroup))
+        p |= QFile::ReadUser;
+
+    if (                                     permissions & QFile::WriteOther
+        || (fileInfo.ownerId() == userId  && permissions & QFile::WriteOwner)
+        || (fileInfo.groupId() == groupId && permissions & QFile::WriteGroup))
+        p |= QFile::WriteUser;
+
+    if (                                     permissions & QFile::ExeOther
+        || (fileInfo.ownerId() == userId  && permissions & QFile::ExeOwner)
+        || (fileInfo.groupId() == groupId && permissions & QFile::ExeGroup))
+        p |= QFile::ExeUser;
+    return p;
+#endif
+}
+
+QExtendedInformation QFileInfoGatherer::getInfo(const QFileInfo &fileInfo) const
+{
+    QExtendedInformation info(fileInfo);
+    info.icon = m_iconProvider->icon(fileInfo);
+    info.setPermissions(translatePermissions(fileInfo));
+    info.displayType = m_iconProvider->type(fileInfo);
+#ifndef QT_NO_FILESYSTEMWATCHER
+    // ### Not ready to listen all modifications
+    #if 0
+        // Enable the next two commented out lines to get updates when the file sizes change...
+        if (!fileInfo.exists() && !fileInfo.isSymLink()) {
+            info.size = -1;
+            //watcher->removePath(fileInfo.absoluteFilePath());
+        } else {
+            if (!fileInfo.absoluteFilePath().isEmpty() && fileInfo.exists() && fileInfo.isReadable()
+                && !watcher->files().contains(fileInfo.absoluteFilePath())) {
+                //watcher->addPath(fileInfo.absoluteFilePath());
+            }
+        }
+    #endif
+#endif
+
+    if (fileInfo.isSymLink() && m_resolveSymlinks) {
+        QFileInfo resolvedInfo(fileInfo.symLinkTarget());
+        resolvedInfo = resolvedInfo.canonicalFilePath();
+        if (resolvedInfo.exists()) {
+            emit nameResolved(fileInfo.filePath(), resolvedInfo.fileName());
+        }
+    }
+    return info;
+}
+
+QString QFileInfoGatherer::translateDriveName(const QFileInfo &drive) const
+{
+    QString driveName = drive.absoluteFilePath();
+#if defined(Q_OS_WIN) && !defined(Q_OS_WINCE)
+    if (driveName.startsWith(QLatin1Char('/'))) // UNC host
+        return drive.fileName();
+    if (driveName.endsWith(QLatin1Char('/')))
+        driveName.chop(1);
+#endif
+    return driveName;
+}
+
+/*
+    Get specific file info's, batch the files so update when we have 100
+    items and every 200ms after that
+ */
+void QFileInfoGatherer::getFileInfos(const QString &path, const QStringList &files)
+{
+#ifndef QT_NO_FILESYSTEMWATCHER
+    //### We test here if the path still exist before adding it in the watcher
+    //### because sometime the file is deleted just before enter here so QStringList files is not up to date
+    //### It is not a proper fix, perhaps in 4.6 we should have a better way to avoid that
+    //### to ensure the gatherer have fresh information
+    QFileInfo info(path);
+    if (files.isEmpty()
+        && !watcher->directories().contains(path)
+        && !path.isEmpty()
+        && info.exists()
+        && !path.startsWith(QLatin1String("//")) /*don't watch UNC path*/) {
+        watcher->addPath(path);
+    }
+#endif
+
+    // List drives
+    if (path.isEmpty()) {
+#if defined Q_AUTOTEST_EXPORT
+        fetchedRoot = true;
+#endif
+        QFileInfoList infoList;
+        if (files.isEmpty()) {
+            infoList = QDir::drives();
+        } else {
+            for (int i = 0; i < files.count(); ++i)
+                infoList << QFileInfo(files.at(i));
+        }
+        for (int i = infoList.count() - 1; i >= 0; --i) {
+            QString driveName = translateDriveName(infoList.at(i));
+            QList<QPair<QString,QFileInfo> > updatedFiles;
+            updatedFiles.append(QPair<QString,QFileInfo>(driveName, infoList.at(i)));
+            emit updates(path, updatedFiles);
+        }
+        return;
+    }
+
+    QTime base = QTime::currentTime();
+    QFileInfo fileInfo;
+    bool firstTime = true;
+    QList<QPair<QString, QFileInfo> > updatedFiles;
+    QStringList filesToCheck = files;
+
+    QString itPath = QDir::fromNativeSeparators(files.isEmpty() ? path : QLatin1String(""));
+    QDirIterator dirIt(itPath, QDir::AllEntries | QDir::System | QDir::Hidden);
+    QStringList allFiles;
+    while(!abort && dirIt.hasNext()) {
+        dirIt.next();
+        fileInfo = dirIt.fileInfo();
+        allFiles.append(fileInfo.fileName());
+	fetch(fileInfo, base, firstTime, updatedFiles, path);
+    }
+    if (!allFiles.isEmpty())
+        emit newListOfFiles(path, allFiles);
+
+    QStringList::const_iterator filesIt = filesToCheck.constBegin();
+    while(!abort && filesIt != filesToCheck.constEnd()) {
+        fileInfo.setFile(path + QDir::separator() + *filesIt);
+        ++filesIt;
+        fetch(fileInfo, base, firstTime, updatedFiles, path);
+    }
+    if (!updatedFiles.isEmpty())
+        emit updates(path, updatedFiles);
+}
+
+void QFileInfoGatherer::fetch(const QFileInfo &fileInfo, QTime &base, bool &firstTime, QList<QPair<QString, QFileInfo> > &updatedFiles, const QString &path) {
+    updatedFiles.append(QPair<QString, QFileInfo>(fileInfo.fileName(), fileInfo));
+    QTime current = QTime::currentTime();
+    if ((firstTime && updatedFiles.count() > 100) || base.msecsTo(current) > 1000) {
+        emit updates(path, updatedFiles);
+        updatedFiles.clear();
+        base = current;
+        firstTime = false;
+    }
+}
+
+#endif // QT_NO_FILESYSTEMMODEL
+
+QT_END_NAMESPACE