Revision control
Copy as Markdown
// Copyright (C) 2022 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
#include "qpermissions.h"
#include "qpermissions_p.h"
#include <QtCore/private/qfactoryloader_p.h>
#include <QtCore/private/qcoreapplication_p.h>
#include <QtCore/qcborarray.h>
QT_BEGIN_NAMESPACE
using namespace Qt::StringLiterals;
namespace {
Q_GLOBAL_STATIC_WITH_ARGS(QFactoryLoader, pluginLoader,
(QPermissionPluginInterface_iid, QLatin1String("/permissions"), Qt::CaseInsensitive))
QPermissionPlugin *permissionPlugin(const QPermission &permission)
{
static QMutex mutex;
QMutexLocker locker(&mutex);
const char *permissionType = permission.type().name();
qCDebug(lcPermissions, "Looking for permission plugin for %s", permissionType);
if (Q_UNLIKELY(!pluginLoader)) {
qCWarning(lcPermissions, "Cannot check or request permissions during application shutdown");
return nullptr;
}
auto metaDataList = pluginLoader()->metaData();
for (int i = 0; i < metaDataList.size(); ++i) {
auto metaData = metaDataList.at(i).value(QtPluginMetaDataKeys::MetaData).toMap();
auto permissions = metaData.value("Permissions"_L1).toArray();
if (permissions.contains(QString::fromUtf8(permissionType))) {
auto className = metaDataList.at(i).value(QtPluginMetaDataKeys::ClassName).toString();
qCDebug(lcPermissions) << "Found matching plugin" << qUtf8Printable(className);
auto *plugin = static_cast<QPermissionPlugin*>(pluginLoader()->instance(i));
return plugin;
}
}
qCWarning(lcPermissions).nospace() << "Could not find permission plugin for "
<< permission.type().name() <<
#ifdef Q_OS_DARWIN
". Please make sure you have included the required usage description in your Info.plist"
#endif
".";
return nullptr;
}
} // Unnamed namespace
namespace QPermissions::Private
{
static constexpr auto FallbackPermission =
#ifdef Q_OS_DARWIN
// On Apple systems, we always have a plugin to get permissions
// with. If it is missing, we fail-closed because something is
// wrong and likely to fail anyway.
Qt::PermissionStatus::Denied;
#else
// On other systems, the plugin may be missing. In that case,
// we optimistically grant access.
Qt::PermissionStatus::Granted;
#endif
Qt::PermissionStatus checkPermission(const QPermission &permission)
{
if (auto *plugin = permissionPlugin(permission))
return plugin->checkPermission(permission);
else
return FallbackPermission;
}
void requestPermission(const QPermission &permission, const QPermissions::Private::PermissionCallback &callback)
{
if (auto *plugin = permissionPlugin(permission))
plugin->requestPermission(permission, callback);
else
callback(FallbackPermission);
}
}
QT_END_NAMESPACE