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++ // Copyright (C) 2016 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
++ // Qt-Security score:significant reason:default
++
++ #include "qdnd_p.h"
++
++ #include "qguiapplication.h"
++ #include <ctype.h>
++ #include <qpa/qplatformdrag.h>
++ #include <qpa/qplatformintegration.h>
++ #include <private/qguiapplication_p.h>
++
++ QT_BEGIN_NAMESPACE
++
++ // the universe's only drag manager
++ QDragManager *QDragManager::m_instance = nullptr;
++
++ QDragManager::QDragManager()
++ : QObject(qApp), m_currentDropTarget(nullptr),
++ m_platformDrag(QGuiApplicationPrivate::platformIntegration()->drag()),
++ m_object(nullptr)
++ {
++ Q_ASSERT(!m_instance);
++ }
++
++ QDragManager::~QDragManager()
++ {
++ m_instance = nullptr;
++ }
++
++ QDragManager *QDragManager::self()
++ {
++ if (!m_instance && !QGuiApplication::closingDown())
++ m_instance = new QDragManager;
++ return m_instance;
++ }
++
++ QObject *QDragManager::source() const
++ {
++ if (m_object)
++ return m_object->source();
++ return nullptr;
++ }
++
++ void QDragManager::setCurrentTarget(QObject *target, bool dropped)
++ {
++ if (m_currentDropTarget == target)
++ return;
++
++ m_currentDropTarget = target;
++ if (!dropped && m_object) {
++ m_object->d_func()->target = target;
++ emit m_object->targetChanged(target);
++ }
++ }
++
++ QObject *QDragManager::currentTarget() const
++ {
++ return m_currentDropTarget;
++ }
++
++ Qt::DropAction QDragManager::drag(QDrag *o)
++ {
++ if (!o || m_object == o)
++ return Qt::IgnoreAction;
++
++ if (!m_platformDrag || !o->source()) {
++ o->deleteLater();
++ return Qt::IgnoreAction;
++ }
++
++ if (m_object) {
++ qWarning("QDragManager::drag in possibly invalid state");
++ return Qt::IgnoreAction;
++ }
++
++ m_object = o;
++
++ m_object->d_func()->target = nullptr;
++
++ QGuiApplicationPrivate::instance()->notifyDragStarted(m_object.data());
++ const Qt::DropAction result = m_platformDrag->drag(m_object);
++ if (!m_object.isNull() && !m_platformDrag->ownsDragObject())
++ m_object->deleteLater();
++
++ m_object.clear();
++ return result;
++ }
++
++ QT_END_NAMESPACE
++
++ #include "moc_qdnd_p.cpp"