/****************************************************************************
**
** Copyright (C) 2018 The Qt Company Ltd.
** Contact: https://www.qt.io/licensing/
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** This file is part of the plugins of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:GPL$
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** accordance with the commercial license agreement provided with the
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** Alternatively, this file may be used under the terms of the GNU
** General Public License version 3 or (at your option) any later version
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** the Free Software Foundation and appearing in the file LICENSE.GPL3
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#ifndef QWASMINTEGRATION_H
#define QWASMINTEGRATION_H

#include "qwasmwindow.h"

#include <qpa/qplatformintegration.h>
#include <qpa/qplatformscreen.h>

#include <QtCore/qhash.h>

#include <emscripten.h>
#include <emscripten/html5.h>

QT_BEGIN_NAMESPACE

class QWasmEventTranslator;
class QWasmFontDatabase;
class QWasmWindow;
class QWasmEventDispatcher;
class QWasmScreen;
class QWasmCompositor;
class QWasmBackingStore;

class QWasmIntegration : public QObject, public QPlatformIntegration
{
    Q_OBJECT
public:
    QWasmIntegration();
    ~QWasmIntegration();

    bool hasCapability(QPlatformIntegration::Capability cap) const override;
    QPlatformWindow *createPlatformWindow(QWindow *window) const override;
    QPlatformBackingStore *createPlatformBackingStore(QWindow *window) const override;
#ifndef QT_NO_OPENGL
    QPlatformOpenGLContext *createPlatformOpenGLContext(QOpenGLContext *context) const override;
#endif
    QPlatformFontDatabase *fontDatabase() const override;
    QAbstractEventDispatcher *createEventDispatcher() const override;
    QVariant styleHint(QPlatformIntegration::StyleHint hint) const override;
    QStringList themeNames() const override;
    QPlatformTheme *createPlatformTheme(const QString &name) const override;

    static QWasmIntegration *get();
    QWasmScreen *screen() { return m_screen; }
    QWasmCompositor *compositor() { return m_compositor; }
    QWasmEventTranslator *eventTranslator() { return m_eventTranslator; }

    static void QWasmBrowserExit();
    static void updateQScreenAndCanvasRenderSize();

private:
    mutable QWasmFontDatabase *m_fontDb;
    QWasmCompositor *m_compositor;
    mutable QWasmScreen *m_screen;
    mutable QWasmEventTranslator *m_eventTranslator;
    mutable QWasmEventDispatcher *m_eventDispatcher;
    static int uiEvent_cb(int eventType, const EmscriptenUiEvent *e, void *userData);
    mutable QHash<QWindow *, QWasmBackingStore *> m_backingStores;
};

QT_END_NAMESPACE

#endif // QWASMINTEGRATION_H