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// Copyright (C) 2018 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only
#ifndef QWASMCOMPOSITOR_H
#define QWASMCOMPOSITOR_H
#include "qwasmwindowstack.h"
#include <qpa/qplatformwindow.h>
#include <QMap>
QT_BEGIN_NAMESPACE
class QWasmWindow;
class QWasmScreen;
class QWasmCompositor final : public QObject
{
Q_OBJECT
public:
QWasmCompositor(QWasmScreen *screen);
~QWasmCompositor() final;
void addWindow(QWasmWindow *window);
void removeWindow(QWasmWindow *window);
void setVisible(QWasmWindow *window, bool visible);
void setActive(QWasmWindow *window);
void raise(QWasmWindow *window);
void lower(QWasmWindow *window);
void windowPositionPreferenceChanged(QWasmWindow *window, Qt::WindowFlags flags);
QWindow *windowAt(QPoint globalPoint, int padding = 0) const;
QWindow *keyWindow() const;
QWasmScreen *screen();
enum UpdateRequestDeliveryType { ExposeEventDelivery, UpdateRequestDelivery };
void requestUpdateWindow(QWasmWindow *window, UpdateRequestDeliveryType updateType = ExposeEventDelivery);
void handleBackingStoreFlush(QWindow *window);
private:
void frame(const QList<QWasmWindow *> &windows);
void onTopWindowChanged();
void deregisterEventHandlers();
void requestUpdate();
void deliverUpdateRequests();
void deliverUpdateRequest(QWasmWindow *window, UpdateRequestDeliveryType updateType);
void updateEnabledState();
QWasmWindowStack m_windowStack;
QWasmWindow *m_activeWindow = nullptr;
bool m_isEnabled = true;
QMap<QWasmWindow *, UpdateRequestDeliveryType> m_requestUpdateWindows;
int m_requestAnimationFrameId = -1;
bool m_inDeliverUpdateRequest = false;
};
QT_END_NAMESPACE
#endif
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