qwasmscreen.h

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// Copyright (C) 2018 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only
 
#ifndef QWASMSCREEN_H
#define QWASMSCREEN_H
 
#include "qwasmcursor.h"
 
#include "qwasmwindowtreenode.h"
 
#include <qpa/qplatformscreen.h>
 
#include <QtCore/qscopedpointer.h>
#include <QtCore/qtextstream.h>
#include <QtCore/private/qstdweb_p.h>
 
#include <emscripten/val.h>
 
QT_BEGIN_NAMESPACE
 
class QPlatformOpenGLContext;
class QWasmWindow;
class QWasmBackingStore;
class QWasmCompositor;
class QWasmDeadKeySupport;
class QOpenGLContext;
 
class QWasmScreen : public QObject, public QPlatformScreen, public QWasmWindowTreeNode
{
    Q_OBJECT
public:
    QWasmScreen(const emscripten::val &containerOrCanvas);
    ~QWasmScreen();
    void deleteScreen();
 
    static QWasmScreen *get(QPlatformScreen *screen);
    static QWasmScreen *get(QScreen *screen);
    emscripten::val element() const;
    QString eventTargetId() const;
    QString outerScreenId() const;
    QPointingDevice *touchDevice() { return m_touchDevice.get(); }
 
    QWasmCompositor *compositor();
    QWasmDeadKeySupport *deadKeySupport() { return m_deadKeySupport.get(); }
 
    QList<QWasmWindow *> allWindows();
 
    QRect geometry() const override;
    int depth() const override;
    QImage::Format format() const override;
    QDpi logicalDpi() const override;
    qreal devicePixelRatio() const override;
    QString name() const override;
    QPlatformCursor *cursor() const override;
 
    void resizeMaximizedWindows();
    QWindow *topWindow() const;
    QWindow *topLevelAt(const QPoint &p) const override;
 
    // QWasmWindowTreeNode:
    emscripten::val containerElement() final;
    QWasmWindowTreeNode *parentNode() final;
 
    QPointF mapFromLocal(const QPointF &p) const;
    QPointF clipPoint(const QPointF &p) const;
 
    void invalidateSize();
    void updateQScreenAndCanvasRenderSize();
    void installCanvasResizeObserver();
    static void canvasResizeObserverCallback(emscripten::val entries, emscripten::val);
 
public slots:
    void setGeometry(const QRect &rect);
 
private:
    // QWasmWindowTreeNode:
    void onSubtreeChanged(QWasmWindowTreeNodeChangeType changeType, QWasmWindowTreeNode *parent,
                          QWasmWindow *child) final;
 
    emscripten::val m_container;
    emscripten::val m_shadowContainer;
    std::unique_ptr<QWasmCompositor> m_compositor;
    std::unique_ptr<QPointingDevice> m_touchDevice;
    std::unique_ptr<QWasmDeadKeySupport> m_deadKeySupport;
    QRect m_geometry = QRect(0, 0, 100, 100);
    int m_depth = 32;
    QImage::Format m_format = QImage::Format_RGB32;
    QWasmCursor m_cursor;
    static const char *m_canvasResizeObserverCallbackContextPropertyName;
    std::unique_ptr<qstdweb::EventCallback> m_onContextMenu;
};
 
QT_END_NAMESPACE
#endif // QWASMSCREEN_H