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

#include "qclipboard.h"

#ifndef QT_NO_CLIPBOARD

#include "qapplication.h"

#include "qapplication_p.h"

#include "qeventloop.h"

#include "qwidget.h"

#include "qevent.h"

#include "qmime.h"

#include "qt_windows.h"

#include "qdnd_p.h"

#include <private/qwidget_p.h>

QT_BEGIN_NAMESPACE

#if defined(Q_OS_WINCE)

QT_BEGIN_INCLUDE_NAMESPACE

#include "qguifunctions_wince.h"

QT_END_INCLUDE_NAMESPACE

HRESULT QtCeGetClipboard(IDataObject** obj);

HRESULT QtCeSetClipboard(IDataObject* obj);

void QtCeFlushClipboard();

#define OleGetClipboard QtCeGetClipboard

#define OleSetClipboard QtCeSetClipboard

#define OleFlushClipboard QtCeFlushClipboard

#endif

class QClipboardWatcher : public QInternalMimeData {

public:

    QClipboardWatcher()

        : QInternalMimeData()

    {

    }

    bool hasFormat_sys(const QString &mimetype) const;

    QStringList formats_sys() const;

    QVariant retrieveData_sys(const QString &mimetype, QVariant::Type preferredType) const;

};

bool QClipboardWatcher::hasFormat_sys(const QString &mime) const

{

    IDataObject * pDataObj = 0;

    if (OleGetClipboard(&pDataObj) != S_OK && !pDataObj) // Sanity

        return false;

    bool has = QWindowsMime::converterToMime(mime, pDataObj) != 0;

    pDataObj->Release();

    return has;

}

QStringList QClipboardWatcher::formats_sys() const

{

    QStringList fmts;

    IDataObject * pDataObj = 0;

    if (OleGetClipboard(&pDataObj) != S_OK && !pDataObj) // Sanity

        return QStringList();

    fmts = QWindowsMime::allMimesForFormats(pDataObj);

    pDataObj->Release();

    return fmts;

}

QVariant QClipboardWatcher::retrieveData_sys(const QString &mimeType, QVariant::Type type) const

{

    QVariant result;

    IDataObject * pDataObj = 0;

    if (OleGetClipboard(&pDataObj) != S_OK && !pDataObj) // Sanity

        return result;

    QWindowsMime *converter = QWindowsMime::converterToMime(mimeType, pDataObj);

    if (converter)

        result = converter->convertToMime(mimeType, pDataObj, type);

    pDataObj->Release();

    return result;

}

class QClipboardData

{

public:

    QClipboardData()

        : iData(0)

        , nextClipboardViewer(0)

    {

        clipBoardViewer = new QWidget();

        clipBoardViewer->createWinId();

        clipBoardViewer->setObjectName(QLatin1String("internal clipboard owner"));

        // We dont need this internal widget to appear in QApplication::topLevelWidgets()

        if (QWidgetPrivate::allWidgets)

            QWidgetPrivate::allWidgets->remove(clipBoardViewer);

    }

    ~QClipboardData()

    {

        Q_ASSERT(clipBoardViewer->testAttribute(Qt::WA_WState_Created));

        ChangeClipboardChain(clipBoardViewer->internalWinId(), nextClipboardViewer);

        delete clipBoardViewer;

        releaseIData();

    }

    void releaseIData()

    {

        if (iData) {

            delete iData->mimeData();

            iData->releaseQt();

            iData->Release();

            iData = 0;

        }

    }

    QOleDataObject * iData;

    QWidget *clipBoardViewer;

    HWND nextClipboardViewer;

    QClipboardWatcher watcher;

};

static QClipboardData *ptrClipboardData = 0;

static QClipboardData *clipboardData()

{

    if (ptrClipboardData == 0) {

        ptrClipboardData = new QClipboardData;

        // this needs to be done here to avoid recursion

        Q_ASSERT(ptrClipboardData->clipBoardViewer->testAttribute(Qt::WA_WState_Created));

        ptrClipboardData->nextClipboardViewer = SetClipboardViewer(ptrClipboardData->clipBoardViewer->internalWinId());

    }

    return ptrClipboardData;

}

static void cleanupClipboardData()

{

    delete ptrClipboardData;

    ptrClipboardData = 0;

}

#if defined(Q_OS_WINCE)

HRESULT QtCeGetClipboard(IDataObject** obj)

{

    HWND owner = ptrClipboardData->clipBoardViewer->internalWinId();

    if (!OpenClipboard(owner))

        return !S_OK;

    if (!IsClipboardFormatAvailable(CF_TEXT) && !IsClipboardFormatAvailable(CF_UNICODETEXT))

        return !S_OK;

    HANDLE clipData = GetClipboardData(CF_TEXT);

    QString clipText;

    if (clipData == 0) {

        clipData = GetClipboardData(CF_UNICODETEXT);

        if (clipData != 0)

            clipText = QString::fromWCharArray((wchar_t *)clipData);

    } else {

        clipText = QString::fromLatin1((const char*)clipData);

    }

    QMimeData *mimeData = new QMimeData();

    mimeData->setText(clipText);

    QOleDataObject* data = new QOleDataObject(mimeData);

    *obj = data;

    CloseClipboard();

    return S_OK;

}

HRESULT QtCeSetClipboard(IDataObject* obj)

{

    HWND owner = ptrClipboardData->clipBoardViewer->internalWinId();

    if (!OpenClipboard(owner))

        return !S_OK;

    bool result = false;

    if (obj == 0) {

        result = true;

        EmptyClipboard();

        CloseClipboard();

    } else {

        QOleDataObject* qobj = static_cast<QOleDataObject*>(obj);

        const QMimeData* data = qobj->mimeData();

        if (data->hasText()) {

            EmptyClipboard();

            result = SetClipboardData(CF_UNICODETEXT, wcsdup(reinterpret_cast<const wchar_t *> (data->text().utf16()))) != NULL;

            CloseClipboard();

            result = true;

        }

    }

    return result ? S_OK : !S_OK;

}

void QtCeFlushClipboard() { }

#endif

QClipboard::~QClipboard()

{

    cleanupClipboardData();

}

void QClipboard::setMimeData(QMimeData *src, Mode mode)

{

    if (mode != Clipboard)

        return;

    QClipboardData *d = clipboardData();

    if (!(d->iData && d->iData->mimeData() == src)) {

        d->releaseIData();

        d->iData = new QOleDataObject(src);

    }

    if (OleSetClipboard(d->iData) != S_OK) {

        d->releaseIData();

        qErrnoWarning("QClipboard::setMimeData: Failed to set data on clipboard");

        return;

    }

#if defined(Q_OS_WINCE)

    // As WinCE does not support notifications we send the signal here

    // We will get no event when the clipboard changes outside...

    emit dataChanged();

    emit changed(Clipboard);

#endif

}

void QClipboard::clear(Mode mode)

{

    if (mode != Clipboard) return;

    QClipboardData *d = clipboardData();

    d->releaseIData();

    if (OleSetClipboard(0) != S_OK) {

        qErrnoWarning("QClipboard::clear: Failed to clear data on clipboard");

        return;

    }

#if defined(Q_OS_WINCE)

    // As WinCE does not support notifications we send the signal here

    // We will get no event when the clipboard changes outside...

    emit dataChanged();

    emit changed(Clipboard);

#endif

}

bool QClipboard::event(QEvent *e)

{

    if (e->type() != QEvent::Clipboard)

        return QObject::event(e);

    QClipboardData *d = clipboardData();

    MSG *m = (MSG *)((QClipboardEvent*)e)->data();

    if (!m) {

        // this is sent to render all formats at app shut down

        if (ownsClipboard()) {

            OleFlushClipboard();

            d->releaseIData();

        }

        return true;

    }

    bool propagate = false;

    if (m->message == WM_CHANGECBCHAIN) {

        if ((HWND)m->wParam == d->nextClipboardViewer)

            d->nextClipboardViewer = (HWND)m->lParam;

        else

            propagate = true;

    } else if (m->message == WM_DRAWCLIPBOARD) {

        emitChanged(QClipboard::Clipboard);

        if (!ownsClipboard() && d->iData)

            // clean up the clipboard object if we no longer own the clipboard

            d->releaseIData();

        propagate = true;

    }

    if (propagate && d->nextClipboardViewer) {

        SendMessage(d->nextClipboardViewer, m->message, m->wParam, m->lParam);

    }

    return true;

}

void QClipboard::connectNotify(const char *signal)

{

    if (qstrcmp(signal,SIGNAL(dataChanged())) == 0) {

        // ensure we are up and running but block signals so the dataChange signal

        // is not emitted while being connected to.

        bool blocked = blockSignals(true);

        QClipboardData *d = clipboardData();

        blockSignals(blocked);

        Q_UNUSED(d);

    }

}

const QMimeData *QClipboard::mimeData(Mode mode) const

{

    if (mode != Clipboard)

        return 0;

    QClipboardData *data = clipboardData();

    // sort cut for local copy / paste

    if (ownsClipboard() && data->iData->mimeData())

        return data->iData->mimeData();

    return &data->watcher;

}

bool QClipboard::supportsMode(Mode mode) const

{

    return (mode == Clipboard);

}

bool QClipboard::ownsMode(Mode mode) const

{

    if (mode == Clipboard) {

        QClipboardData *d = clipboardData();

#if !defined(Q_OS_WINCE)

        return d->iData && OleIsCurrentClipboard(d->iData) == S_OK;

#else

        return d->iData && GetClipboardOwner() == d->clipBoardViewer->internalWinId();

#endif

    } else {

        return false;

    }

}

void QClipboard::ownerDestroyed()

{

}

QT_END_NAMESPACE

#endif // QT_NO_CLIPBOARD