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#include "qwindowsdropdataobject.h"

#include <QtCore/qurl.h>
#include <QtCore/qmimedata.h>

QT_BEGIN_NAMESPACE

/*!
    \class QWindowsDropDataObject
    \brief QWindowsOleDataObject subclass specialized for handling Drag&Drop.

   Only allows "text/uri-list" data to be exported as CF_HDROP, to allow dropped
   files to be attached to Office applications (instead of adding an URL link).

    \internal
    \ingroup qt-lighthouse-win
*/

QWindowsDropDataObject::QWindowsDropDataObject(QMimeData *mimeData) :
    QWindowsOleDataObject(mimeData)
{
}

QWindowsDropDataObject::~QWindowsDropDataObject() = default;

STDMETHODIMP
QWindowsDropDataObject::GetData(LPFORMATETC pformatetc, LPSTGMEDIUM pmedium)
{
    if (shouldIgnore(pformatetc))
        return ResultFromScode(DATA_E_FORMATETC);

    return QWindowsOleDataObject::GetData(pformatetc, pmedium);
}

STDMETHODIMP
QWindowsDropDataObject::QueryGetData(LPFORMATETC pformatetc)
{
    if (shouldIgnore(pformatetc))
        return ResultFromScode(DATA_E_FORMATETC);

    return QWindowsOleDataObject::QueryGetData(pformatetc);
}

// If the data is text/uri-list for local files, tell we can only export it as CF_HDROP.
bool QWindowsDropDataObject::shouldIgnore(LPFORMATETC pformatetc) const
{
    QMimeData *dropData = mimeData();

    if (dropData && dropData->hasFormat(QStringLiteral("text/uri-list")) && (pformatetc->cfFormat != CF_HDROP)) {
        QList<QUrl> urls = dropData->urls();
        return std::any_of(urls.cbegin(), urls.cend(), [] (const QUrl &u) { return u.isLocalFile(); });
    }

    return false;
}

QT_END_NAMESPACE