// Copyright (C) 2018 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only

#include "qtestsupport_widgets.h"

#include "qwidget.h"

#include <QtGui/qwindow.h>
#include <QtCore/qtestsupport_core.h>
#include <QtCore/qthread.h>
#include <QtGui/qtestsupport_gui.h>
#include <QtGui/private/qevent_p.h>
#include <QtGui/private/qeventpoint_p.h>
#include <private/qguiapplication_p.h>
#include <qpa/qplatformintegration.h>

QT_BEGIN_NAMESPACE

template <typename FunctorWindowGetter, typename FunctorPredicate>
static bool qWaitForWidgetWindow(FunctorWindowGetter windowGetter, FunctorPredicate predicate, int timeout)
{
    if (!windowGetter())
        return false;

    return QTest::qWaitFor([&]() {
        if (QWindow *window = windowGetter())
            return predicate(window);
        return false;
    }, timeout);
}

/*!
    \since 5.0

    Waits for \a timeout milliseconds or until the \a widget's window is active.

    Returns \c true if \c widget's window is active within \a timeout milliseconds, otherwise returns \c false.

    \sa qWaitForWindowExposed(), QWidget::isActiveWindow()
*/
Q_WIDGETS_EXPORT bool QTest::qWaitForWindowActive(QWidget *widget, int timeout)
{
    if (Q_UNLIKELY(!QGuiApplicationPrivate::platformIntegration()->hasCapability(QPlatformIntegration::WindowActivation))) {
        qWarning() << "qWaitForWindowActive was called on a platform that doesn't support window"
                   << "activation. This means there is an error in the test and it should either"
                   << "check for the WindowActivation platform capability before calling"
                   << "qWaitForWindowActivate, use qWaitForWindowExposed instead, or skip the test."
                   << "Falling back to qWaitForWindowExposed.";
        return qWaitForWindowExposed(widget, timeout);
    }
    return qWaitForWidgetWindow([&]() { return widget->window()->windowHandle(); },
                                [&](QWindow *window) { return window->isActive(); },
                                timeout);
}

/*!
    \since 5.0

    Waits for \a timeout milliseconds or until the \a widget's window is exposed.
    Returns \c true if \c widget's window is exposed within \a timeout milliseconds, otherwise returns \c false.

    This is mainly useful for asynchronous systems like X11, where a window will be mapped to screen some
    time after being asked to show itself on the screen.

    Note that a window that is mapped to screen may still not be considered exposed if the window client
    area is completely covered by other windows, or if the window is otherwise not visible. This function
    will then time out when waiting for such a window.

    A specific configuration where this happens is when using QGLWidget as a viewport widget on macOS:
    The viewport widget gets the expose event, not the parent widget.

    \sa qWaitForWindowActive()
*/
Q_WIDGETS_EXPORT bool QTest::qWaitForWindowExposed(QWidget *widget, int timeout)
{
    return qWaitForWidgetWindow([&]() { return widget->window()->windowHandle(); },
                                [&](QWindow *window) { return window->isExposed(); },
                                timeout);
}

namespace QTest {

QTouchEventWidgetSequence::~QTouchEventWidgetSequence()
{
    if (commitWhenDestroyed)
        commit();
}

QTouchEventWidgetSequence& QTouchEventWidgetSequence::press(int touchId, const QPoint &pt, QWidget *widget)
{
    auto &p = point(touchId);
    QMutableEventPoint::setGlobalPosition(p, mapToScreen(widget, pt));
    QMutableEventPoint::setState(p, QEventPoint::State::Pressed);
    return *this;
}
QTouchEventWidgetSequence& QTouchEventWidgetSequence::move(int touchId, const QPoint &pt, QWidget *widget)
{
    auto &p = point(touchId);
    QMutableEventPoint::setGlobalPosition(p, mapToScreen(widget, pt));
    QMutableEventPoint::setState(p, QEventPoint::State::Updated);
    return *this;
}
QTouchEventWidgetSequence& QTouchEventWidgetSequence::release(int touchId, const QPoint &pt, QWidget *widget)
{
    auto &p = point(touchId);
    QMutableEventPoint::setGlobalPosition(p, mapToScreen(widget, pt));
    QMutableEventPoint::setState(p, QEventPoint::State::Released);
    return *this;
}

QTouchEventWidgetSequence& QTouchEventWidgetSequence::stationary(int touchId)
{
    auto &p = pointOrPreviousPoint(touchId);
    QMutableEventPoint::setState(p, QEventPoint::State::Stationary);
    return *this;
}

void QTouchEventWidgetSequence::commit(bool processEvents)
{
    if (points.isEmpty())
        return;
    QThread::msleep(1);
    if (targetWindow) {
        qt_handleTouchEvent(targetWindow, device, points.values());
    } else if (targetWidget) {
        qt_handleTouchEvent(targetWidget->windowHandle(), device, points.values());
    }
    if (processEvents)
        QCoreApplication::processEvents();
    previousPoints = points;
    points.clear();
}

QTest::QTouchEventWidgetSequence::QTouchEventWidgetSequence(QWidget *widget, QPointingDevice *aDevice, bool autoCommit)
    : QTouchEventSequence(nullptr, aDevice, autoCommit), targetWidget(widget)
{
}

QPoint QTouchEventWidgetSequence::mapToScreen(QWidget *widget, const QPoint &pt)
{
    if (widget)
        return widget->mapToGlobal(pt);
    return targetWidget ? targetWidget->mapToGlobal(pt) : pt;
}

} // namespace QTest

QT_END_NAMESPACE