/****************************************************************************

**

** Copyright (C) 2016 The Qt Company Ltd.

** Contact: https://www.qt.io/licensing/

**

** This file is part of the QtGui module of the Qt Toolkit.

**

** $QT_BEGIN_LICENSE:LGPL$

** Commercial License Usage

** Licensees holding valid commercial Qt licenses may use this file in

** accordance with the commercial license agreement provided with the

** Software or, alternatively, in accordance with the terms contained in

** a written agreement between you and The Qt Company. For licensing terms

** and conditions see https://www.qt.io/terms-conditions. For further

** information use the contact form at https://www.qt.io/contact-us.

**

** GNU Lesser General Public License Usage

** Alternatively, this file may be used under the terms of the GNU Lesser

** General Public License version 3 as published by the Free Software

** Foundation and appearing in the file LICENSE.LGPL3 included in the

** packaging of this file. Please review the following information to

** ensure the GNU Lesser General Public License version 3 requirements

** will be met: https://www.gnu.org/licenses/lgpl-3.0.html.

**

** GNU General Public License Usage

** Alternatively, this file may be used under the terms of the GNU

** General Public License version 2.0 or (at your option) the GNU General

** Public license version 3 or any later version approved by the KDE Free

** Qt Foundation. The licenses are as published by the Free Software

** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3

** included in the packaging of this file. Please review the following

** information to ensure the GNU General Public License requirements will

** be met: https://www.gnu.org/licenses/gpl-2.0.html and

** https://www.gnu.org/licenses/gpl-3.0.html.

**

** $QT_END_LICENSE$

**

****************************************************************************/

#include "qplatformdrag.h"

#include <QtGui/private/qdnd_p.h>

#include <QtGui/QKeyEvent>

#include <QtGui/QGuiApplication>

#include <QtCore/QEventLoop>

QT_BEGIN_NAMESPACE

#ifdef QDND_DEBUG

#  include <QtCore/QDebug>

#endif

QPlatformDropQtResponse::QPlatformDropQtResponse(bool accepted, Qt::DropAction acceptedAction)

    : m_accepted(accepted)

    , m_accepted_action(acceptedAction)

{

}

bool QPlatformDropQtResponse::isAccepted() const

{

    return m_accepted;

}

Qt::DropAction QPlatformDropQtResponse::acceptedAction() const

{

    return m_accepted_action;

}

QPlatformDragQtResponse::QPlatformDragQtResponse(bool accepted, Qt::DropAction acceptedAction, QRect answerRect)

    : QPlatformDropQtResponse(accepted,acceptedAction)

    , m_answer_rect(answerRect)

{

}

QRect QPlatformDragQtResponse::answerRect() const

{

    return m_answer_rect;

}

class QPlatformDragPrivate {

public:

    QPlatformDragPrivate() : cursor_drop_action(Qt::IgnoreAction) {}

    Qt::DropAction cursor_drop_action;

};

/*!

    \class QPlatformDrag

    \since 5.0

    \internal

    \preliminary

    \ingroup qpa

    \brief The QPlatformDrag class provides an abstraction for drag.

 */

QPlatformDrag::QPlatformDrag() : d_ptr(new QPlatformDragPrivate)

{

}

QPlatformDrag::~QPlatformDrag()

{

    delete d_ptr;

}

QDrag *QPlatformDrag::currentDrag() const

{

    return QDragManager::self()->object();

}

Qt::DropAction QPlatformDrag::defaultAction(Qt::DropActions possibleActions,

                                           Qt::KeyboardModifiers modifiers) const

{

#ifdef QDND_DEBUG

    qDebug() << "QDragManager::defaultAction(Qt::DropActions possibleActions)\nkeyboard modifiers : " << modifiers;

#endif

    Qt::DropAction default_action = Qt::IgnoreAction;

    if (currentDrag()) {

        default_action = currentDrag()->defaultAction();

    }

    if (default_action == Qt::IgnoreAction) {

        //This means that the drag was initiated by QDrag::start and we need to

        //preserve the old behavior

        default_action = Qt::CopyAction;

    }

    if (modifiers & Qt::ControlModifier && modifiers & Qt::ShiftModifier)

        default_action = Qt::LinkAction;

    else if (modifiers & Qt::ControlModifier)

        default_action = Qt::CopyAction;

    else if (modifiers & Qt::ShiftModifier)

        default_action = Qt::MoveAction;

    else if (modifiers & Qt::AltModifier)

        default_action = Qt::LinkAction;

#ifdef QDND_DEBUG

    qDebug() << "possible actions : " << possibleActions;

#endif

    // Check if the action determined is allowed

    if (!(possibleActions & default_action)) {

        if (possibleActions & Qt::CopyAction)

            default_action = Qt::CopyAction;

        else if (possibleActions & Qt::MoveAction)

            default_action = Qt::MoveAction;

        else if (possibleActions & Qt::LinkAction)

            default_action = Qt::LinkAction;

        else

            default_action = Qt::IgnoreAction;

    }

#ifdef QDND_DEBUG

    qDebug() << "default action : " << default_action;

#endif

    return default_action;

}

/*!

    \brief Cancels the currently active drag (only for drags of

    the current application initiated by QPlatformDrag::drag()).

    The default implementation does nothing.

    \since 5.7

 */

void QPlatformDrag::cancelDrag()

{

    Q_UNIMPLEMENTED();

}

/*!

    \brief Called to notify QDrag about changes of the current action.

 */

void QPlatformDrag::updateAction(Qt::DropAction action)

{

    Q_D(QPlatformDrag);

    if (d->cursor_drop_action != action) {

        d->cursor_drop_action = action;

        emit currentDrag()->actionChanged(action);

    }

}

static const char *const default_pm[] = {

"13 9 3 1",

".      c None",

"       c #000000",

"X      c #FFFFFF",

"X X X X X X X",

" X X X X X X ",

"X ......... X",

" X.........X ",

"X ......... X",

" X.........X ",

"X ......... X",

" X X X X X X ",

"X X X X X X X",

};

Q_GLOBAL_STATIC_WITH_ARGS(QPixmap,qt_drag_default_pixmap,(default_pm))

QPixmap QPlatformDrag::defaultPixmap()

{

    return *qt_drag_default_pixmap();

}

/*!

    \since 5.4

    \brief Returns bool indicating whether QPlatformDrag takes ownership

    and therefore responsibility of deleting the QDrag object passed in

    from QPlatformDrag::drag. This can be useful on platforms where QDrag

    object has to be kept around.

 */

bool QPlatformDrag::ownsDragObject() const

{

    return false;

}

QT_END_NAMESPACE