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#include "render_widget_host_view_qt_delegate_quickwindow.h"

#include "qquickwebengineview_p_p.h"
#include <QQuickItem>

namespace QtWebEngineCore {

RenderWidgetHostViewQtDelegateQuickWindow::RenderWidgetHostViewQtDelegateQuickWindow(RenderWidgetHostViewQtDelegateQuick *realDelegate)
    : m_realDelegate(realDelegate)
    , m_virtualParent(nullptr)
{
    setFlags(Qt::Tool | Qt::WindowStaysOnTopHint | Qt::FramelessWindowHint | Qt::WindowDoesNotAcceptFocus);
}

RenderWidgetHostViewQtDelegateQuickWindow::~RenderWidgetHostViewQtDelegateQuickWindow()
{
}

void RenderWidgetHostViewQtDelegateQuickWindow::setVirtualParent(QQuickItem *virtualParent)
{
    Q_ASSERT(virtualParent);
    m_virtualParent = virtualParent;
}

static inline QRectF mapRectToGlobal(const QQuickItem *item, const QRectF &rect)
{
    const QPointF p1 = item->mapToGlobal(rect.topLeft());
    const QPointF p2 = item->mapToGlobal(rect.bottomRight());
    return QRectF(p1, p2).normalized();
}

static inline QRectF mapRectFromGlobal(const QQuickItem *item, const QRectF &rect)
{
    const QPointF p1 = item->mapFromGlobal(rect.topLeft());
    const QPointF p2 = item->mapFromGlobal(rect.bottomRight());
    return QRectF(p1, p2).normalized();
}

void RenderWidgetHostViewQtDelegateQuickWindow::initAsPopup(const QRect &screenRect)
{
    QRectF popupRect(screenRect);
    popupRect = mapRectFromGlobal(m_virtualParent, popupRect);
    popupRect = m_virtualParent->mapRectToScene(popupRect);
    popupRect = mapRectToGlobal(m_virtualParent, popupRect);

    m_realDelegate->initAsPopup(QRect(QPoint(0, 0), popupRect.size().toSize()));
    popupRect.setSize(screenRect.size());
    setGeometry(popupRect.toAlignedRect());
    raise();
    show();
}

QRectF RenderWidgetHostViewQtDelegateQuickWindow::viewGeometry() const
{
    return geometry();
}

QRect RenderWidgetHostViewQtDelegateQuickWindow::windowGeometry() const
{
    return frameGeometry();
}

void RenderWidgetHostViewQtDelegateQuickWindow::show()
{
    QQuickWindow::show();
    m_realDelegate->show();
}

void RenderWidgetHostViewQtDelegateQuickWindow::hide()
{
    QQuickWindow::hide();
    m_realDelegate->hide();
}

bool RenderWidgetHostViewQtDelegateQuickWindow::isVisible() const
{
    return QQuickWindow::isVisible();
}

QWindow *RenderWidgetHostViewQtDelegateQuickWindow::window() const
{
    return const_cast<RenderWidgetHostViewQtDelegateQuickWindow*>(this);
}

QSGTexture *RenderWidgetHostViewQtDelegateQuickWindow::createTextureFromImage(const QImage &image)
{
    return m_realDelegate->createTextureFromImage(image);
}

QSGLayer *RenderWidgetHostViewQtDelegateQuickWindow::createLayer()
{
    return m_realDelegate->createLayer();
}

QSGImageNode *RenderWidgetHostViewQtDelegateQuickWindow::createImageNode()
{
    return m_realDelegate->createImageNode();
}

QSGRectangleNode *RenderWidgetHostViewQtDelegateQuickWindow::createRectangleNode()
{
    return m_realDelegate->createRectangleNode();
}

void RenderWidgetHostViewQtDelegateQuickWindow::update()
{
    QQuickWindow::update();
    m_realDelegate->update();
}

void RenderWidgetHostViewQtDelegateQuickWindow::updateCursor(const QCursor &cursor)
{
    setCursor(cursor);
}

void RenderWidgetHostViewQtDelegateQuickWindow::resize(int width, int height)
{
    QQuickWindow::resize(width, height);
    m_realDelegate->resize(width, height);
}

void RenderWidgetHostViewQtDelegateQuickWindow::move(const QPoint &screenPos)
{
    QRectF popupRect(screenPos, size());
    popupRect = mapRectFromGlobal(m_virtualParent, popupRect);
    popupRect = m_virtualParent->mapRectToScene(popupRect);
    popupRect = mapRectToGlobal(m_virtualParent, popupRect);

    QQuickWindow::setPosition(popupRect.topLeft().toPoint());
}

} // namespace QtWebEngineCore