/****************************************************************************
**
** Copyright (C) 2016 The Qt Company Ltd.
** Contact: https://www.qt.io/licensing/
**
** This file is part of Qt Creator.
**
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** accordance with the commercial license agreement provided with the
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** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 3 as published by the Free Software
** Foundation with exceptions as appearing in the file LICENSE.GPL3-EXCEPT
** included in the packaging of this file. Please review the following
** information to ensure the GNU General Public License requirements will
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****************************************************************************/

#include "execmenu.h"

#include <QApplication>
#if QT_VERSION < QT_VERSION_CHECK(5, 11, 0)
#include <QDesktopWidget>
#else
#include <QWindow>
#include <QScreen>
#endif
#include <QMenu>
#include <QPoint>
#include <QRect>
#include <QSize>
#include <QWidget>

//namespace Utils {
QT_BEGIN_NAMESPACE
/*!
 * Opens \a menu at the specified \a widget position.
 * This function computes the position where to show the menu, and opens it with
 * QMenu::exec().
 */
QAction* execMenuAtWidget(QMenu* menu, QWidget* widget)
{
    QPoint p;
#if QT_VERSION < QT_VERSION_CHECK(5, 11, 0)
    QRect screen = QApplication::desktop()->availableGeometry(widget);
#else
    QScreen *scr = widget->window()->windowHandle()->screen();
    QRect screen = scr->availableGeometry();
#endif
    QSize sh = menu->sizeHint();
    QRect rect = widget->rect();
    if (widget->isRightToLeft()) {
        if (widget->mapToGlobal(QPoint(0, rect.bottom())).y() + sh.height() <= screen.height()) {
            p = widget->mapToGlobal(rect.bottomRight());
        } else {
            p = widget->mapToGlobal(rect.topRight() - QPoint(0, sh.height()));
        }
        p.rx() -= sh.width();
    } else {
        if (widget->mapToGlobal(QPoint(0, rect.bottom())).y() + sh.height() <= screen.height()) {
            p = widget->mapToGlobal(rect.bottomLeft());
        } else {
            p = widget->mapToGlobal(rect.topLeft() - QPoint(0, sh.height()));
        }
    }
    p.rx() = qMax(screen.left(), qMin(p.x(), screen.right() - sh.width()));
    p.ry() += 1;

    return menu->exec(p);
}

//} // namespace Utils
