/*
* All or portions of this file Copyright (c) Amazon.com, Inc. or its affiliates or
* its licensors.
*
* For complete copyright and license terms please see the LICENSE at the root of this
* distribution (the "License"). All use of this software is governed by the License,
* or, if provided, by the license below or the license accompanying this file. Do not
* remove or modify any license notices. This file is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
*
*/
// Original file Copyright Crytek GMBH or its affiliates, used under license.

#include "StdAfx.h"
#include "MultiMonHelper.h"

#include <QScreen>

////////////////////////////////////////////////////////////////////////////
void ClipOrCenterRectToMonitor(QRect *prc, const UINT flags)
{
    const QScreen* currentScreen = nullptr;
    QRect rc;

    Q_ASSERT(prc);

    const auto screens = qApp->screens();
    for (auto screen : screens)
    {
        if (screen->geometry().contains(prc->center()))
        {
            currentScreen = screen;
            break;
        }
    }

    if (!currentScreen)
    {
        return;
    }

    const int w = prc->width();
    const int h = prc->height();

    if (flags & MONITOR_WORKAREA)
    {
        rc = currentScreen->availableGeometry();
    }
    else
    {
        rc = currentScreen->geometry();
    }

    // center or clip the passed rect to the monitor rect
    if (flags & MONITOR_CENTER)
    {
        prc->setLeft(rc.left() + (rc.right()  - rc.left() - w) / 2);
        prc->setTop(rc.top() + (rc.bottom() - rc.top() - h) / 2);
        prc->setRight(prc->left() + w);
        prc->setBottom(prc->top() + h);
    }
    else
    {
        prc->setLeft(qMax(rc.left(), qMin(rc.right() - w, prc->left())));
        prc->setTop(qMax(rc.top(), qMin(rc.bottom() - h, prc->top())));
        prc->setRight(prc->left() + w);
        prc->setBottom(prc->top() + h);
    }
}