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// Copyright (C) 2018 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
#ifndef QQMLPREVIEWFILEENGINE_H
#define QQMLPREVIEWFILEENGINE_H
//
// W A R N I N G
// -------------
//
// This file is not part of the Qt API. It exists purely as an
// implementation detail. This header file may change from version to
// version without notice, or even be removed.
//
// We mean it.
//
#include "qqmlpreviewfileloader.h"
#include <QtCore/qpointer.h>
#include <private/qabstractfileengine_p.h>
#include <private/qfsfileengine_p.h>
#include <QtCore/qbuffer.h>
#include <memory>
QT_BEGIN_NAMESPACE
class QQmlPreviewFileEngine : public QAbstractFileEngine
{
public:
QQmlPreviewFileEngine(const QString &file, const QString &absolute,
QQmlPreviewFileLoader *loader);
void setFileName(const QString &file) override;
bool open(QIODevice::OpenMode flags, std::optional<QFile::Permissions> permissions) override;
bool close() override;
qint64 size() const override;
qint64 pos() const override;
bool seek(qint64) override;
qint64 read(char *data, qint64 maxlen) override;
FileFlags fileFlags(FileFlags type) const override;
QString fileName(QAbstractFileEngine::FileName file) const override;
uint ownerId(FileOwner) const override;
IteratorUniquePtr beginEntryList(const QString &path, QDir::Filters filters,
const QStringList &filterNames) override;
IteratorUniquePtr endEntryList() override;
// Forwarding to fallback if exists
bool flush() override;
bool syncToDisk() override;
bool isSequential() const override;
bool remove() override;
bool copy(const QString &newName) override;
bool rename(const QString &newName) override;
bool renameOverwrite(const QString &newName) override;
bool link(const QString &newName) override;
bool mkdir(const QString &dirName, bool createParentDirectories,
std::optional<QFile::Permissions> permissions = std::nullopt) const override;
bool rmdir(const QString &dirName, bool recurseParentDirectories) const override;
bool setSize(qint64 size) override;
bool caseSensitive() const override;
bool isRelativePath() const override;
QStringList entryList(QDir::Filters filters, const QStringList &filterNames) const override;
bool setPermissions(uint perms) override;
QByteArray id() const override;
QString owner(FileOwner) const override;
QDateTime fileTime(QFile::FileTime time) const override;
int handle() const override;
qint64 readLine(char *data, qint64 maxlen) override;
qint64 write(const char *data, qint64 len) override;
bool extension(Extension extension, const ExtensionOption *option, ExtensionReturn *output) override;
bool supportsExtension(Extension extension) const override;
private:
void load() const;
QString m_name;
QString m_absolute;
QPointer<QQmlPreviewFileLoader> m_loader;
mutable QBuffer m_contents;
mutable QStringList m_entries;
mutable std::unique_ptr<QAbstractFileEngine> m_fallback;
mutable QQmlPreviewFileLoader::Result m_result = QQmlPreviewFileLoader::Unknown;
};
class QQmlPreviewFileEngineHandler : public QAbstractFileEngineHandler
{
Q_DISABLE_COPY_MOVE(QQmlPreviewFileEngineHandler)
public:
QQmlPreviewFileEngineHandler(QQmlPreviewFileLoader *loader);
std::unique_ptr<QAbstractFileEngine> create(const QString &fileName) const override;
private:
QPointer<QQmlPreviewFileLoader> m_loader;
};
QT_END_NAMESPACE
#endif // QQMLPREVIEWFILEENGINE_H
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