126 lines
3.5 KiB
C++
126 lines
3.5 KiB
C++
// Copyright (C) 2018 The Qt Company Ltd.
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// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only WITH Qt-GPL-exception-1.0
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#include "qmlpreviewfilesystemwatcher.h"
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#include <QtCore/qdebug.h>
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#include <QtCore/qdir.h>
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#include <QtCore/qfilesystemwatcher.h>
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QmlPreviewFileSystemWatcher::QmlPreviewFileSystemWatcher(QObject *parent) :
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QObject(parent), m_watcher(new QFileSystemWatcher(this))
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{
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connect(m_watcher, &QFileSystemWatcher::fileChanged,
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this, &QmlPreviewFileSystemWatcher::fileChanged);
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connect(m_watcher, &QFileSystemWatcher::directoryChanged,
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this, &QmlPreviewFileSystemWatcher::onDirectoryChanged);
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}
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bool QmlPreviewFileSystemWatcher::watchesFile(const QString &file) const
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{
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return m_files.contains(file);
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}
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void QmlPreviewFileSystemWatcher::addFile(const QString &file)
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{
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if (watchesFile(file)) {
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qWarning() << "FileSystemWatcher: File" << file << "is already being watched.";
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return;
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}
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QStringList toAdd(file);
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m_files.insert(file);
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const QString directory = QFileInfo(file).path();
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const int dirCount = ++m_directoryCount[directory];
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Q_ASSERT(dirCount > 0);
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if (dirCount == 1)
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toAdd.append(directory);
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m_watcher->addPaths(toAdd);
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}
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void QmlPreviewFileSystemWatcher::removeFile(const QString &file)
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{
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WatchEntrySetIterator it = m_files.find(file);
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if (it == m_files.end()) {
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qWarning() << "FileSystemWatcher: File" << file << "is not watched.";
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return;
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}
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QStringList toRemove(file);
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m_files.erase(it);
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m_watcher->removePath(file);
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const QString directory = QFileInfo(file).path();
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const int dirCount = --m_directoryCount[directory];
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Q_ASSERT(dirCount >= 0);
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if (!dirCount)
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toRemove.append(directory);
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m_watcher->removePaths(toRemove);
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}
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bool QmlPreviewFileSystemWatcher::watchesDirectory(const QString &directory) const
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{
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return m_directories.contains(directory);
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}
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void QmlPreviewFileSystemWatcher::addDirectory(const QString &directory)
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{
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if (watchesDirectory(directory)) {
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qWarning() << "FileSystemWatcher: Directory" << directory << "is already being watched.";
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return;
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}
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m_directories.insert(directory);
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const int count = ++m_directoryCount[directory];
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Q_ASSERT(count > 0);
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if (count == 1)
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m_watcher->addPath(directory);
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}
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void QmlPreviewFileSystemWatcher::removeDirectory(const QString &directory)
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{
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WatchEntrySetIterator it = m_directories.find(directory);
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if (it == m_directories.end()) {
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qWarning() << "FileSystemWatcher: Directory" << directory << "is not watched.";
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return;
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}
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m_directories.erase(it);
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const int count = --m_directoryCount[directory];
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Q_ASSERT(count >= 0);
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if (!count)
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m_watcher->removePath(directory);
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}
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void QmlPreviewFileSystemWatcher::onDirectoryChanged(const QString &path)
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{
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if (m_directories.contains(path))
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emit directoryChanged(path);
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QStringList toReadd;
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const QDir dir(path);
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for (const QFileInfo &entry : dir.entryInfoList(QDir::Files)) {
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const QString file = entry.filePath();
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if (m_files.contains(file))
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toReadd.append(file);
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}
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if (!toReadd.isEmpty()) {
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const QStringList remove = m_watcher->addPaths(toReadd);
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for (const QString &rejected : remove)
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toReadd.removeOne(rejected);
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// If we've successfully added the file, that means it was deleted and replaced.
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for (const QString &reAdded : std::as_const(toReadd))
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emit fileChanged(reAdded);
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}
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}
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