| /**************************************************************************** |
| ** |
| ** Copyright (C) 2018 The Qt Company Ltd. |
| ** Contact: https://www.qt.io/licensing/ |
| ** |
| ** This file is part of the QtQml module of the Qt Toolkit. |
| ** |
| ** $QT_BEGIN_LICENSE:GPL-EXCEPT$ |
| ** Commercial License Usage |
| ** Licensees holding valid commercial Qt licenses may use this file in |
| ** accordance with the commercial license agreement provided with the |
| ** Software or, alternatively, in accordance with the terms contained in |
| ** a written agreement between you and The Qt Company. For licensing terms |
| ** and conditions see https://www.qt.io/terms-conditions. For further |
| ** information use the contact form at https://www.qt.io/contact-us. |
| ** |
| ** GNU General Public License Usage |
| ** Alternatively, this file may be used under the terms of the GNU |
| ** General Public License version 3 as published by the Free Software |
| ** Foundation with exceptions as appearing in the file LICENSE.GPL3-EXCEPT |
| ** included in the packaging of this file. Please review the following |
| ** information to ensure the GNU General Public License requirements will |
| ** be met: https://www.gnu.org/licenses/gpl-3.0.html. |
| ** |
| ** $QT_END_LICENSE$ |
| ** |
| ****************************************************************************/ |
| |
| #include "qmlpreviewfilesystemwatcher.h" |
| |
| #include <QtCore/qdebug.h> |
| #include <QtCore/qdir.h> |
| #include <QtCore/qfilesystemwatcher.h> |
| |
| QmlPreviewFileSystemWatcher::QmlPreviewFileSystemWatcher(QObject *parent) : |
| QObject(parent), m_watcher(new QFileSystemWatcher(this)) |
| { |
| connect(m_watcher, &QFileSystemWatcher::fileChanged, |
| this, &QmlPreviewFileSystemWatcher::fileChanged); |
| connect(m_watcher, &QFileSystemWatcher::directoryChanged, |
| this, &QmlPreviewFileSystemWatcher::onDirectoryChanged); |
| } |
| |
| bool QmlPreviewFileSystemWatcher::watchesFile(const QString &file) const |
| { |
| return m_files.contains(file); |
| } |
| |
| void QmlPreviewFileSystemWatcher::addFile(const QString &file) |
| { |
| if (watchesFile(file)) { |
| qWarning() << "FileSystemWatcher: File" << file << "is already being watched."; |
| return; |
| } |
| |
| QStringList toAdd(file); |
| m_files.insert(file); |
| |
| const QString directory = QFileInfo(file).path(); |
| const int dirCount = ++m_directoryCount[directory]; |
| Q_ASSERT(dirCount > 0); |
| |
| if (dirCount == 1) |
| toAdd.append(directory); |
| |
| m_watcher->addPaths(toAdd); |
| } |
| |
| void QmlPreviewFileSystemWatcher::removeFile(const QString &file) |
| { |
| WatchEntrySetIterator it = m_files.find(file); |
| if (it == m_files.end()) { |
| qWarning() << "FileSystemWatcher: File" << file << "is not watched."; |
| return; |
| } |
| |
| QStringList toRemove(file); |
| m_files.erase(it); |
| m_watcher->removePath(file); |
| |
| const QString directory = QFileInfo(file).path(); |
| const int dirCount = --m_directoryCount[directory]; |
| Q_ASSERT(dirCount >= 0); |
| |
| if (!dirCount) |
| toRemove.append(directory); |
| |
| m_watcher->removePaths(toRemove); |
| } |
| |
| bool QmlPreviewFileSystemWatcher::watchesDirectory(const QString &directory) const |
| { |
| return m_directories.contains(directory); |
| } |
| |
| void QmlPreviewFileSystemWatcher::addDirectory(const QString &directory) |
| { |
| if (watchesDirectory(directory)) { |
| qWarning() << "FileSystemWatcher: Directory" << directory << "is already being watched."; |
| return; |
| } |
| |
| m_directories.insert(directory); |
| const int count = ++m_directoryCount[directory]; |
| Q_ASSERT(count > 0); |
| |
| if (count == 1) |
| m_watcher->addPath(directory); |
| } |
| |
| void QmlPreviewFileSystemWatcher::removeDirectory(const QString &directory) |
| { |
| WatchEntrySetIterator it = m_directories.find(directory); |
| if (it == m_directories.end()) { |
| qWarning() << "FileSystemWatcher: Directory" << directory << "is not watched."; |
| return; |
| } |
| |
| m_directories.erase(it); |
| |
| const int count = --m_directoryCount[directory]; |
| Q_ASSERT(count >= 0); |
| |
| if (!count) |
| m_watcher->removePath(directory); |
| } |
| |
| void QmlPreviewFileSystemWatcher::onDirectoryChanged(const QString &path) |
| { |
| if (m_directories.contains(path)) |
| emit directoryChanged(path); |
| |
| QStringList toReadd; |
| const QDir dir(path); |
| for (const QFileInfo &entry : dir.entryInfoList(QDir::Files)) { |
| const QString file = entry.filePath(); |
| if (m_files.contains(file)) |
| toReadd.append(file); |
| } |
| |
| if (!toReadd.isEmpty()) { |
| const QStringList remove = m_watcher->addPaths(toReadd); |
| for (const QString &rejected : remove) |
| toReadd.removeOne(rejected); |
| |
| // If we've successfully added the file, that means it was deleted and replaced. |
| for (const QString &reAdded : qAsConst(toReadd)) |
| emit fileChanged(reAdded); |
| } |
| } |