qdnd_mac.mm

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/****************************************************************************
**
** Copyright (C) 2014 Digia Plc and/or its subsidiary(-ies).
** Contact: http://www.qt-project.org/legal
**
** This file is part of the QtGui module of the Qt Toolkit.
**
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#include "qapplication.h"
#ifndef QT_NO_DRAGANDDROP
#include "qbitmap.h"
#include "qcursor.h"
#include "qevent.h"
#include "qpainter.h"
#include "qurl.h"
#include "qwidget.h"
#include "qfile.h"
#include "qfileinfo.h"
#include <stdlib.h>
#include <string.h>
#ifndef QT_NO_ACCESSIBILITY
# include "qaccessible.h"
#endif

#include <private/qapplication_p.h>
#include <private/qwidget_p.h>
#include <private/qdnd_p.h>
#include <private/qt_mac_p.h>

QT_BEGIN_NAMESPACE

QT_USE_NAMESPACE

QMacDndAnswerRecord qt_mac_dnd_answer_rec; 

/*****************************************************************************
  QDnD debug facilities
 *****************************************************************************/
//#define DEBUG_DRAG_EVENTS
//#define DEBUG_DRAG_PROMISES

/*****************************************************************************
  QDnD globals
 *****************************************************************************/
bool qt_mac_in_drag = false;
#ifndef QT_MAC_USE_COCOA
static DragReference qt_mac_current_dragRef = 0;
#endif

/*****************************************************************************
  Externals
 *****************************************************************************/
extern void qt_mac_send_modifiers_changed(quint32, QObject *); //qapplication_mac.cpp
extern uint qGlobalPostedEventsCount(); //qapplication.cpp
extern RgnHandle qt_mac_get_rgn(); // qregion_mac.cpp
extern void qt_mac_dispose_rgn(RgnHandle); // qregion_mac.cpp
/*****************************************************************************
  QDnD utility functions
 *****************************************************************************/

//default pixmap
static const int default_pm_hotx = -2;
static const int default_pm_hoty = -16;
#ifndef QT_MAC_USE_COCOA
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",
};
#endif

//action management
#ifdef DEBUG_DRAG_EVENTS
# define MAP_MAC_ENUM(x) x, #x
#else
# define MAP_MAC_ENUM(x) x
#endif
struct mac_enum_mapper
{
    int mac_code;
    int qt_code;
#ifdef DEBUG_DRAG_EVENTS
    char *qt_desc;
#endif
};
#ifndef QT_MAC_USE_COCOA
static mac_enum_mapper dnd_action_symbols[] = {
    { kDragActionAlias, MAP_MAC_ENUM(Qt::LinkAction) },
    { kDragActionMove, MAP_MAC_ENUM(Qt::MoveAction) },
    { kDragActionGeneric, MAP_MAC_ENUM(Qt::CopyAction) },
    { kDragActionCopy, MAP_MAC_ENUM(Qt::CopyAction) },
    { 0, MAP_MAC_ENUM(0) }
};
static DragActions qt_mac_dnd_map_qt_actions(Qt::DropActions qActions)
{
    DragActions ret = kDragActionNothing;
    for(int i = 0; dnd_action_symbols[i].qt_code; ++i) {
        if(qActions & dnd_action_symbols[i].qt_code)
            ret |= dnd_action_symbols[i].mac_code;
    }
    return ret;
}
static Qt::DropActions qt_mac_dnd_map_mac_actions(DragActions macActions)
{
#ifdef DEBUG_DRAG_EVENTS
    qDebug("Converting DND ActionList: 0x%lx", macActions);
#endif
    Qt::DropActions ret = Qt::IgnoreAction;
    for(int i = 0; dnd_action_symbols[i].qt_code; ++i) {
#ifdef DEBUG_DRAG_EVENTS
        qDebug(" %d) [%s] : %s", i, dnd_action_symbols[i].qt_desc,
                (macActions & dnd_action_symbols[i].mac_code) ? "true" : "false");
#endif
        if(macActions & dnd_action_symbols[i].mac_code)
            ret |= Qt::DropAction(dnd_action_symbols[i].qt_code);
    }
    return ret;
}
static Qt::DropAction qt_mac_dnd_map_mac_default_action(DragActions macActions)
{
    static Qt::DropAction preferred_actions[] = { Qt::CopyAction, Qt::LinkAction, //in order
        Qt::MoveAction, Qt::IgnoreAction };
    Qt::DropAction ret = Qt::IgnoreAction;
    const Qt::DropActions qtActions = qt_mac_dnd_map_mac_actions(macActions);
    for(int i = 0; preferred_actions[i] != Qt::IgnoreAction; ++i) {
        if(qtActions & preferred_actions[i]) {
            ret = preferred_actions[i];
            break;
        }
    }
#ifdef DEBUG_DRAG_EVENTS
    for(int i = 0; dnd_action_symbols[i].qt_code; ++i) {
        if(dnd_action_symbols[i].qt_code == ret) {
            qDebug("Got default action: %s [0x%lx]", dnd_action_symbols[i].qt_desc, macActions);
            break;
        }
    }
#endif
    return ret;
}
static void qt_mac_dnd_update_action(DragReference dragRef) {
    SInt16 modifiers;
    GetDragModifiers(dragRef, &modifiers, 0, 0);
    qt_mac_send_modifiers_changed(modifiers, qApp);

    Qt::DropAction qtAction = Qt::IgnoreAction;
    {
        DragActions macAllowed = kDragActionNothing;
        GetDragDropAction(dragRef, &macAllowed);
        Qt::DropActions qtAllowed = qt_mac_dnd_map_mac_actions(macAllowed);
        qtAction = QDragManager::self()->defaultAction(qtAllowed, QApplication::keyboardModifiers());
#if 1
        if(!(qtAllowed & qtAction))
            qtAction = qt_mac_dnd_map_mac_default_action(macAllowed);
#endif
    }
    DragActions macAction = qt_mac_dnd_map_qt_actions(qtAction);

    DragActions currentActions;
    GetDragDropAction(dragRef, &currentActions);
    if(currentActions != macAction) {
        SetDragDropAction(dragRef, macAction);
        QDragManager::self()->emitActionChanged(qtAction);
    }
}
#endif // !QT_MAC_USE_COCOA

/*****************************************************************************
  DnD functions
 *****************************************************************************/
bool QDropData::hasFormat_sys(const QString &mime) const
{
#ifndef QT_MAC_USE_COCOA
    OSPasteboardRef board;
    if(GetDragPasteboard(qt_mac_current_dragRef, &board) != noErr) {
        qDebug("DnD: Cannot get PasteBoard!");
        return false;
    }
    return QMacPasteboard(board, QMacPasteboardMime::MIME_DND).hasFormat(mime);
#else
    Q_UNUSED(mime);
    return false;
#endif // !QT_MAC_USE_COCOA
}

QVariant QDropData::retrieveData_sys(const QString &mime, QVariant::Type type) const
{
#ifndef QT_MAC_USE_COCOA
    OSPasteboardRef board;
    if(GetDragPasteboard(qt_mac_current_dragRef, &board) != noErr) {
        qDebug("DnD: Cannot get PasteBoard!");
        return QVariant();
    }
    return QMacPasteboard(board, QMacPasteboardMime::MIME_DND).retrieveData(mime, type);
#else
    Q_UNUSED(mime);
    Q_UNUSED(type);
    return QVariant();
#endif // !QT_MAC_USE_COCOA
}

QStringList QDropData::formats_sys() const
{
#ifndef QT_MAC_USE_COCOA
    OSPasteboardRef board;
    if(GetDragPasteboard(qt_mac_current_dragRef, &board) != noErr) {
        qDebug("DnD: Cannot get PasteBoard!");
        return QStringList();
    }
    return QMacPasteboard(board, QMacPasteboardMime::MIME_DND).formats();
#else
    return QStringList();
#endif
}

void QDragManager::timerEvent(QTimerEvent*)
{
}

bool QDragManager::eventFilter(QObject *, QEvent *)
{
    return false;
}

void QDragManager::updateCursor()
{
}

void QDragManager::cancel(bool)
{
    if(object) {
        beingCancelled = true;
        object = 0;
    }
#ifndef QT_NO_ACCESSIBILITY
    QAccessible::updateAccessibility(this, 0, QAccessible::DragDropEnd);
#endif
}

void QDragManager::move(const QPoint &)
{
}

void QDragManager::drop()
{
}

static inline bool qt_mac_set_existing_drop_action(const DragRef &dragRef, QDropEvent &event)
{
#ifndef QT_MAC_USE_COCOA
    DragActions currentAction = kDragActionNothing;        
    OSStatus err = GetDragDropAction(dragRef, &currentAction);
    if (err == noErr && currentAction != kDragActionNothing) {
        // This looks a bit evil, but we only ever set one action, so it's OK.
        event.setDropAction(Qt::DropAction(int(qt_mac_dnd_map_mac_actions(currentAction))));
        return true;
    }
#else
    Q_UNUSED(dragRef);
    Q_UNUSED(event);
#endif
    return false;
}

void qt_mac_copy_answer_rect(const QDragMoveEvent &event)
{
    if (!event.answerRect().isEmpty()) {
        qt_mac_dnd_answer_rec.rect = event.answerRect();
        qt_mac_dnd_answer_rec.buttons = event.mouseButtons();
        qt_mac_dnd_answer_rec.modifiers = event.keyboardModifiers();
        qt_mac_dnd_answer_rec.lastAction = event.dropAction();
    }    
}

bool qt_mac_mouse_inside_answer_rect(QPoint mouse)
{
    if (!qt_mac_dnd_answer_rec.rect.isEmpty()
            && qt_mac_dnd_answer_rec.rect.contains(mouse)
            && QApplication::mouseButtons() == qt_mac_dnd_answer_rec.buttons
            && QApplication::keyboardModifiers() == qt_mac_dnd_answer_rec.modifiers)
        return true;
    else
        return false;
}

bool QWidgetPrivate::qt_mac_dnd_event(uint kind, DragRef dragRef)
{
#ifndef QT_MAC_USE_COCOA
    Q_Q(QWidget);
    qt_mac_current_dragRef = dragRef;
    if (kind != kEventControlDragLeave)
        qt_mac_dnd_update_action(dragRef);

    Point mouse;
    GetDragMouse(dragRef, &mouse, 0L);
    if(!mouse.h && !mouse.v)
        GetGlobalMouse(&mouse);

    if(QApplicationPrivate::modalState()) {
        for(QWidget *modal = q; modal; modal = modal->parentWidget()) {
            if(modal->isWindow()) {
                if(modal != QApplication::activeModalWidget())
                    return noErr;
                break;
            }
        }
    }

    //lookup the possible actions
    DragActions allowed = kDragActionNothing;
    GetDragAllowableActions(dragRef, &allowed);
    Qt::DropActions qtAllowed = qt_mac_dnd_map_mac_actions(allowed);

    //lookup the source dragAccepted 
    QMimeData *dropdata = QDragManager::self()->dropData;
    if(QDragManager::self()->source())
        dropdata = QDragManager::self()->dragPrivate()->data;

    // 'interrestedInDrag' should end up being 'true' if a later drop
    // will be accepted by the widget for the current mouse position 
    bool interrestedInDrag = true;

    //Dispatch events
    if (kind == kEventControlDragWithin) {
        if (qt_mac_mouse_inside_answer_rect(q->mapFromGlobal(QPoint(mouse.h, mouse.v))))
            return qt_mac_dnd_answer_rec.lastAction == Qt::IgnoreAction;
        else
            qt_mac_dnd_answer_rec.clear();
        
        QDragMoveEvent qDMEvent(q->mapFromGlobal(QPoint(mouse.h, mouse.v)), qtAllowed, dropdata,
                QApplication::mouseButtons(), QApplication::keyboardModifiers());
                
        // Accept the event by default if a
        // drag action exists on the carbon event
        if (qt_mac_set_existing_drop_action(dragRef, qDMEvent))
            qDMEvent.accept();
            
        QApplication::sendEvent(q, &qDMEvent);
        if (!qDMEvent.isAccepted() || qDMEvent.dropAction() == Qt::IgnoreAction)
            interrestedInDrag = false;

        qt_mac_copy_answer_rect(qDMEvent);
        SetDragDropAction(dragRef, qt_mac_dnd_map_qt_actions(qDMEvent.dropAction()));
        
    } else if (kind == kEventControlDragEnter) {
        qt_mac_dnd_answer_rec.clear();
        
        QDragEnterEvent qDEEvent(q->mapFromGlobal(QPoint(mouse.h, mouse.v)), qtAllowed, dropdata,
                QApplication::mouseButtons(), QApplication::keyboardModifiers());
        qt_mac_set_existing_drop_action(dragRef, qDEEvent);                         
        QApplication::sendEvent(q, &qDEEvent);
        SetDragDropAction(dragRef, qt_mac_dnd_map_qt_actions(qDEEvent.dropAction()));
        
        if (!qDEEvent.isAccepted())
            // The widget is simply not interested in this
            // drag. So tell carbon this by returning 'false'. We will then
            // not receive any further move, drop or leave events for this widget.
            return false;
        else {
            // Documentation states that a drag move event is sent immediately after
            // a drag enter event. So we do that. This will honor widgets overriding
            // 'dragMoveEvent' only, and not 'dragEnterEvent' 
            QDragMoveEvent qDMEvent(q->mapFromGlobal(QPoint(mouse.h, mouse.v)), qtAllowed, dropdata,
                    QApplication::mouseButtons(), QApplication::keyboardModifiers());
            qDMEvent.accept(); // accept by default, since enter event was accepted.
            qDMEvent.setDropAction(qDEEvent.dropAction());         
            QApplication::sendEvent(q, &qDMEvent);
            if (!qDMEvent.isAccepted() || qDMEvent.dropAction() == Qt::IgnoreAction)
                interrestedInDrag = false;
            
            qt_mac_copy_answer_rect(qDMEvent);           
            SetDragDropAction(dragRef, qt_mac_dnd_map_qt_actions(qDMEvent.dropAction()));
        }
        
    } else if(kind == kEventControlDragLeave) {
        QDragLeaveEvent de;
        QApplication::sendEvent(q, &de);
    } else if(kind == kEventControlDragReceive) {
        QDropEvent de(q->mapFromGlobal(QPoint(mouse.h, mouse.v)), qtAllowed, dropdata,
                      QApplication::mouseButtons(), QApplication::keyboardModifiers());
        if(QDragManager::self()->object)
            QDragManager::self()->dragPrivate()->target = q;
        QApplication::sendEvent(q, &de);
        if(!de.isAccepted()) {
            interrestedInDrag = false;
            SetDragDropAction(dragRef, kDragActionNothing);
        } else {
            if(QDragManager::self()->object)
                QDragManager::self()->dragPrivate()->executed_action = de.dropAction();
            SetDragDropAction(dragRef, qt_mac_dnd_map_qt_actions(de.dropAction()));
        }
    }

#ifdef DEBUG_DRAG_EVENTS
    {
        const char *desc = 0;
        switch(kind) {
        case kEventControlDragWithin: desc = "DragMove"; break;
        case kEventControlDragEnter: desc = "DragEnter"; break;
        case kEventControlDragLeave: desc = "DragLeave"; break;
        case kEventControlDragReceive: desc = "DragDrop"; break;
        }
        if(desc) {
            QPoint pos(q->mapFromGlobal(QPoint(mouse.h, mouse.v)));
            qDebug("Sending <%s>(%d, %d) event to %p(%s::%s) [%d] (%p)",
                   desc, pos.x(), pos.y(), q, q->metaObject()->className(),
                   q->objectName().toLocal8Bit().constData(), ret, dragRef);
        }
    }
#endif

    //set the cursor
    bool found_cursor = false;
    if(kind == kEventControlDragWithin || kind == kEventControlDragEnter) {
        ThemeCursor cursor = kThemeNotAllowedCursor;
        found_cursor = true;
        if (interrestedInDrag) {
            DragActions action = kDragActionNothing;
            GetDragDropAction(dragRef, &action);
            switch(qt_mac_dnd_map_mac_default_action(action)) {
            case Qt::IgnoreAction:
                cursor = kThemeNotAllowedCursor;
                break;
            case Qt::MoveAction:
                cursor = kThemeArrowCursor;
                break;
            case Qt::CopyAction:
                cursor = kThemeCopyArrowCursor;
                break;
            case Qt::LinkAction:
                cursor = kThemeAliasArrowCursor;
                break;
            default:
                cursor = kThemeNotAllowedCursor;
                break;
            }
        }
        SetThemeCursor(cursor);
    }
    if(found_cursor) {
        qt_mac_set_cursor(0); //just use our's
    } else {
        QCursor cursor(Qt::ArrowCursor);
        if(qApp && qApp->overrideCursor()) {
            cursor = *qApp->overrideCursor();
        } else if(q) {
            for(QWidget *p = q; p; p = p->parentWidget()) {
                if(p->isEnabled() && p->testAttribute(Qt::WA_SetCursor)) {
                    cursor = p->cursor();
                    break;
                }
            }
        }
        qt_mac_set_cursor(&cursor);
    }

    //idle things
    if(qGlobalPostedEventsCount()) {
        QApplication::sendPostedEvents();
        QApplication::flush();
    }
    
    // If this was not a drop, tell carbon that we will be interresed in receiving more
    // events for the current drag. We do that by returning true. 
    if (kind == kEventControlDragReceive)
        return interrestedInDrag;
    else
        return true;
#else
    Q_UNUSED(kind);
    Q_UNUSED(dragRef);
    return false;
#endif // !QT_MAC_USE_COCOA
}

#ifndef QT_MAC_USE_COCOA
Qt::DropAction QDragManager::drag(QDrag *o)
{
  
    if(qt_mac_in_drag) {     //just make sure..
        qWarning("Qt: Internal error: WH0A, unexpected condition reached");
        return Qt::IgnoreAction;
    }
    if(object == o)
        return Qt::IgnoreAction;
    /* At the moment it seems clear that Mac OS X does not want to drag with a non-left button
       so we just bail early to prevent it */
    if(!(GetCurrentEventButtonState() & kEventMouseButtonPrimary))
        return Qt::IgnoreAction;

    if(object) {
        dragPrivate()->source->removeEventFilter(this);
        cancel();
        beingCancelled = false;
    }

    object = o;
    dragPrivate()->target = 0;

#ifndef QT_NO_ACCESSIBILITY
    QAccessible::updateAccessibility(this, 0, QAccessible::DragDropStart);
#endif

    //setup the data
    QMacPasteboard dragBoard(QMacPasteboardMime::MIME_DND);
    dragBoard.setMimeData(dragPrivate()->data);

    //create the drag
    OSErr result;
    DragRef dragRef;
    if((result = NewDragWithPasteboard(dragBoard.pasteBoard(), &dragRef)))
        return Qt::IgnoreAction;
    //setup the actions
    DragActions possibleActions = qt_mac_dnd_map_qt_actions(dragPrivate()->possible_actions);
    SetDragAllowableActions(dragRef, //local
                            possibleActions,
                            true);
    SetDragAllowableActions(dragRef, //remote (same as local)
                            possibleActions,
                            false);


    QPoint hotspot;
    QPixmap pix = dragPrivate()->pixmap;
    if(pix.isNull()) {
        if(dragPrivate()->data->hasText() || dragPrivate()->data->hasUrls()) {
            //get the string
            QString s = dragPrivate()->data->hasText() ? dragPrivate()->data->text()
                                                : dragPrivate()->data->urls().first().toString();
            if(s.length() > 26)
                s = s.left(23) + QChar(0x2026);
            if(!s.isEmpty()) {
                //draw it
                QFont f(qApp->font());
                f.setPointSize(12);
                QFontMetrics fm(f);
                const int width = fm.width(s);
                const int height = fm.height();
                if(width > 0 && height > 0) {
                    QPixmap tmp(width, height);
                    QPainter p(&tmp);
                    p.fillRect(0, 0, tmp.width(), tmp.height(), Qt::color0);
                    p.setPen(Qt::color1);
                    p.setFont(f);
                    p.drawText(0, fm.ascent(), s);
                    p.end();
                    //save it
                    pix = tmp;
                    hotspot = QPoint(tmp.width() / 2, tmp.height() / 2);
                }
            }
        } else {
            pix = QPixmap(default_pm);
            hotspot = QPoint(default_pm_hotx, default_pm_hoty);
        }
    } else {
        hotspot = dragPrivate()->hotspot;
    }

    //so we must fake an event
    EventRecord fakeEvent;
    GetGlobalMouse(&(fakeEvent.where));
    fakeEvent.message = 0;
    fakeEvent.what = mouseDown;
    fakeEvent.when = EventTimeToTicks(GetCurrentEventTime());
    fakeEvent.modifiers = GetCurrentKeyModifiers();
    if(GetCurrentEventButtonState() & 2)
        fakeEvent.modifiers |= controlKey;

    //find the hotspot in relation to the pixmap
    Point boundsPoint;
    boundsPoint.h = fakeEvent.where.h - hotspot.x();
    boundsPoint.v = fakeEvent.where.v - hotspot.y();
    Rect boundsRect;
    SetRect(&boundsRect, boundsPoint.h, boundsPoint.v, boundsPoint.h + pix.width(), boundsPoint.v + pix.height());

    //set the drag image
    QRegion dragRegion(boundsPoint.h, boundsPoint.v, pix.width(), pix.height()), pixRegion;
    if(!pix.isNull()) {
        HIPoint hipoint = { -hotspot.x(), -hotspot.y() };
        CGImageRef img = (CGImageRef)pix.macCGHandle();
        SetDragImageWithCGImage(dragRef, img, &hipoint, 0);
        CGImageRelease(img);
    }

    SetDragItemBounds(dragRef, (ItemReference)1 , &boundsRect);
    { //do the drag
        qt_mac_in_drag = true;
        qt_mac_dnd_update_action(dragRef);
        result = TrackDrag(dragRef, &fakeEvent, QMacSmartQuickDrawRegion(dragRegion.toQDRgn()));
        qt_mac_in_drag = false;
    }
    object = 0;
    if(result == noErr) {
        // Check if the receiver points us to
        // a file location. If so, we need to do
        // the file copy/move ourselves:
        QCFType<CFURLRef> pasteLocation = 0;
        PasteboardCopyPasteLocation(dragBoard.pasteBoard(), &pasteLocation);
        if (pasteLocation){
            Qt::DropAction action = o->d_func()->defaultDropAction;
            if (action == Qt::IgnoreAction){
                if (o->d_func()->possible_actions & Qt::MoveAction)
                    action = Qt::MoveAction;
                else if (o->d_func()->possible_actions & Qt::CopyAction)
                    action = Qt::CopyAction;
                
            }
            bool atleastOne = false;
            QList<QUrl> urls = o->mimeData()->urls();
            for (int i = 0; i < urls.size(); ++i){
                QUrl fromUrl = urls.at(i);
                QString filename = QFileInfo(fromUrl.path()).fileName();
                QUrl toUrl(QCFString::toQString(CFURLGetString(pasteLocation)) + filename);
                if (action == Qt::MoveAction){
                    if (QFile::rename(fromUrl.path(), toUrl.path()))
                        atleastOne = true;
                } else if (action == Qt::CopyAction){
                    if (QFile::copy(fromUrl.path(), toUrl.path()))
                        atleastOne = true;
                }
            }
            if (atleastOne){
                DisposeDrag(dragRef);
                o->setMimeData(0);
                o->deleteLater();
                return action;
            }
        }

        DragActions ret = kDragActionNothing;
        GetDragDropAction(dragRef, &ret);
        DisposeDrag(dragRef); //cleanup
        o->setMimeData(0);
        o->deleteLater();
        return qt_mac_dnd_map_mac_default_action(ret);
    }
    DisposeDrag(dragRef); //cleanup
    return Qt::IgnoreAction;
}
#endif

void QDragManager::updatePixmap()
{
}

QCocoaDropData::QCocoaDropData(CFStringRef pasteboard)
    : QInternalMimeData()
{
    NSString* pasteboardName = (NSString*)pasteboard;
    [pasteboardName retain];
    dropPasteboard = pasteboard;
}

QCocoaDropData::~QCocoaDropData()
{
    NSString* pasteboardName = (NSString*)dropPasteboard;
    [pasteboardName release];
}

QStringList QCocoaDropData::formats_sys() const
{
    QStringList formats; 
    OSPasteboardRef board;
    if (PasteboardCreate(dropPasteboard, &board) != noErr) {
        qDebug("DnD: Cannot get PasteBoard!");
        return formats;
    }
    formats = QMacPasteboard(board, QMacPasteboardMime::MIME_DND).formats();
    return formats;
}

QVariant QCocoaDropData::retrieveData_sys(const QString &mimeType, QVariant::Type type) const
{
    QVariant data;
    OSPasteboardRef board;
    if (PasteboardCreate(dropPasteboard, &board) != noErr) {
        qDebug("DnD: Cannot get PasteBoard!");
        return data;
    }
    data = QMacPasteboard(board, QMacPasteboardMime::MIME_DND).retrieveData(mimeType, type);
    CFRelease(board);
    return data;
}

bool QCocoaDropData::hasFormat_sys(const QString &mimeType) const
{
    bool has = false;
    OSPasteboardRef board;
    if (PasteboardCreate(dropPasteboard, &board) != noErr) {
        qDebug("DnD: Cannot get PasteBoard!");
        return has;
    }
    has = QMacPasteboard(board, QMacPasteboardMime::MIME_DND).hasFormat(mimeType);
    CFRelease(board);
    return has;
}

#endif // QT_NO_DRAGANDDROP
QT_END_NAMESPACE