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#include "qeglplatformscreen_p.h"
#include <QtGui/qwindow.h>
#include <qpa/qwindowsysteminterface.h>
#include <QtPlatformSupport/private/qopenglcompositor_p.h>

QT_BEGIN_NAMESPACE

/*!
    \class QEGLPlatformScreen
    \brief Base class for EGL-based platform screen implementations.
    \since 5.2
    \internal
    \ingroup qpa
 */

QEGLPlatformScreen::QEGLPlatformScreen(EGLDisplay dpy)
    : m_dpy(dpy),
      m_pointerWindow(0)
{
}

QEGLPlatformScreen::~QEGLPlatformScreen()
{
    QOpenGLCompositor::destroy();
}

void QEGLPlatformScreen::handleCursorMove(const QPoint &pos)
{
    const QOpenGLCompositor *compositor = QOpenGLCompositor::instance();
    const QList<QOpenGLCompositorWindow *> windows = compositor->windows();

    // Generate enter and leave events like a real windowing system would do.
    if (windows.isEmpty())
        return;

    // First window is always fullscreen.
    if (windows.count() == 1) {
        QWindow *window = windows[0]->sourceWindow();
        if (m_pointerWindow != window) {
            m_pointerWindow = window;
            QWindowSystemInterface::handleEnterEvent(window, window->mapFromGlobal(pos), pos);
        }
        return;
    }

    QWindow *enter = 0, *leave = 0;
    for (int i = windows.count() - 1; i >= 0; --i) {
        QWindow *window = windows[i]->sourceWindow();
        const QRect geom = window->geometry();
        if (geom.contains(pos)) {
            if (m_pointerWindow != window) {
                leave = m_pointerWindow;
                m_pointerWindow = window;
                enter = window;
            }
            break;
        }
    }

    if (enter && leave)
        QWindowSystemInterface::handleEnterLeaveEvent(enter, leave, enter->mapFromGlobal(pos), pos);
}

QT_END_NAMESPACE