qdnd_x11.cpp

奇趣公司比较新的qt/emd版本

//$$$
QString QX11Data::xdndMimeAtomToString(Atom a)
{
    QString atomName;
    if (a) {
        char *atom = XGetAtomName(display, a);
        atomName = QString::fromLatin1(atom);
        XFree(atom);
    }
    return atomName;
}

//$$$
Atom QX11Data::xdndMimeStringToAtom(const QString &mimeType)
{
    if (mimeType.isEmpty())
        return 0;
    return XInternAtom(display, mimeType.toLatin1().constData(), False);
}

//$$$ replace ccxdndAtomToString()
QStringList QX11Data::xdndMimeFormatsForAtom(Atom a)
{
    QStringList formats;
    if (a) {
        QString atomName = xdndMimeAtomToString(a);
        formats.append(atomName);

        // special cases for string type
        if (a == ATOM(UTF8_STRING) || a == XA_STRING
            || a == ATOM(TEXT) || a == ATOM(COMPOUND_TEXT))
            formats.append(QLatin1String("text/plain"));

        // special cases for uris
        if (atomName == QLatin1String("text/x-moz-url"))
            formats.append(QLatin1String("text/uri-list"));

        // special case for images
        if (a == XA_PIXMAP)
            formats.append(QLatin1String("image/ppm"));
    }
    return formats;
}

//$$$
bool QX11Data::xdndMimeDataForAtom(Atom a, QMimeData *mimeData, QByteArray *data, Atom *atomFormat, int *dataFormat)
{
    bool ret = false;
    *atomFormat = a;
    *dataFormat = 8;
    QString atomName = xdndMimeAtomToString(a);
    if (QInternalMimeData::hasFormatHelper(atomName, mimeData)) {
        *data = QInternalMimeData::renderDataHelper(atomName, mimeData);
        if (atomName == QLatin1String("application/x-color"))
            *dataFormat = 16;
        ret = true;
    } else {
        if ((a == ATOM(UTF8_STRING) || a == XA_STRING
             || a == ATOM(TEXT) || a == ATOM(COMPOUND_TEXT))
            && QInternalMimeData::hasFormatHelper(QLatin1String("text/plain"), mimeData)) {
            if (a == ATOM(UTF8_STRING)){
                *data = QInternalMimeData::renderDataHelper(QLatin1String("text/plain"), mimeData);
                ret = true;
            } else if (a == XA_STRING) {
                *data = QString::fromUtf8(QInternalMimeData::renderDataHelper(
                        QLatin1String("text/plain"), mimeData)).toLocal8Bit();
                ret = true;
            } else if (a == ATOM(TEXT) || a == ATOM(COMPOUND_TEXT)) {
                // the ICCCM states that TEXT and COMPOUND_TEXT are in the
                // encoding of choice, so we choose the encoding of the locale
                QByteArray strData = QString::fromUtf8(QInternalMimeData::renderDataHelper(
                                     QLatin1String("text/plain"), mimeData)).toLocal8Bit();
                char *list[] = { strData.data(), NULL };

                XICCEncodingStyle style = (a == ATOM(COMPOUND_TEXT))
                                        ? XCompoundTextStyle : XStdICCTextStyle;
                XTextProperty textprop;
                if (list[0] != NULL
                    && XmbTextListToTextProperty(X11->display, list, 1, style,
                                                 &textprop) == Success) {
                    *atomFormat = textprop.encoding;
                    *dataFormat = textprop.format;
                    *data = QByteArray((const char *) textprop.value, textprop.nitems * textprop.format / 8);

                    DEBUG("    textprop type %lx\n"
                    "    textprop name '%s'\n"
                    "    format %d\n"
                    "    %ld items\n"
                    "    %d bytes\n",
                    textprop.encoding,
                    X11->xdndMimeAtomToString(textprop.encoding).toLatin1().data(),
                    textprop.format, textprop.nitems, data->size());

                    XFree(textprop.value);
                }
            }
        } else if (atomName == QLatin1String("text/x-moz-url") &&
                   QInternalMimeData::hasFormatHelper(QLatin1String("text/uri-list"), mimeData)) {
            QByteArray uri = QInternalMimeData::renderDataHelper(
                             QLatin1String("text/uri-list"), mimeData).split('\n').first();
            QString mozUri = QString::fromLatin1(uri, uri.size());
            mozUri += QLatin1Char('\n');
            *data = QByteArray(reinterpret_cast<const char *>(mozUri.utf16()), mozUri.length() * 2);
            ret = true;
        } else if ((a == XA_PIXMAP || a == XA_BITMAP) && mimeData->hasImage()) {
            QPixmap pm = qvariant_cast<QPixmap>(mimeData->imageData());
            if (a == XA_BITMAP && pm.depth() != 1) {
                QImage img = pm.toImage();
                img = img.convertToFormat(QImage::Format_MonoLSB);
                pm = QPixmap::fromImage(img);
            }
            QDragManager *dm = QDragManager::self();
            if (dm) {
                Pixmap handle = pm.handle();
                *data = QByteArray((const char *) &handle, sizeof(Pixmap));
                dm->xdndMimeTransferedPixmap[dm->xdndMimeTransferedPixmapIndex] = pm;
                dm->xdndMimeTransferedPixmapIndex =
                            (dm->xdndMimeTransferedPixmapIndex + 1) % 2;
            }
        }
    }
    return data;
}

//$$$
QList<Atom> QX11Data::xdndMimeAtomsForFormat(const QString &format)
{
    QList<Atom> atoms;
    atoms.append(xdndMimeStringToAtom(format));

    // special cases for strings
    if (format == QLatin1String("text/plain")) {
        atoms.append(ATOM(UTF8_STRING));
        atoms.append(XA_STRING);
        atoms.append(ATOM(TEXT));
        atoms.append(ATOM(COMPOUND_TEXT));
    }

    // special cases for uris
    if (format == QLatin1String("text/uri-list")) {
        atoms.append(xdndMimeStringToAtom(QLatin1String("text/x-moz-url")));
    }

    //special cases for images
    if (format == QLatin1String("image/ppm"))
        atoms.append(XA_PIXMAP);
    if (format == QLatin1String("image/pbm"))
        atoms.append(XA_BITMAP);

    return atoms;
}

//$$$
QVariant QX11Data::xdndMimeConvertToFormat(Atom a, const QByteArray &data, const QString &format, QVariant::Type requestedType, const QByteArray &encoding)
{
    QString atomName = xdndMimeAtomToString(a);
    if (atomName == format)
        return data;

    if (!encoding.isEmpty()
        && atomName == format + QLatin1String(";charset=") + QString::fromLatin1(encoding)) {

        if (requestedType == QVariant::String) {
            QTextCodec *codec = QTextCodec::codecForName(encoding);
            if (codec)
                return codec->toUnicode(data);
        }

        return data;
    }

    // special cases for string types
    if (format == QLatin1String("text/plain")) {
        if (a == ATOM(UTF8_STRING))
            return QString::fromUtf8(data);
        if (a == XA_STRING)
            return QString::fromLatin1(data);
        if (a == ATOM(TEXT) || a == ATOM(COMPOUND_TEXT))
            // #### might be wrong for COMPUND_TEXT
            return QString::fromLocal8Bit(data, data.size());
    }

    // special case for uri types
    if (format == QLatin1String("text/uri-list")) {
        if (atomName == QLatin1String("text/x-moz-url")) {
            // we expect this as utf16 <url><space><title>
            // the first part is a url that should only contain ascci char
            // so it should be safe to check that the second char is 0
            // to verify that it is utf16
            if (data.size() > 1 && data.at(1) == 0)
                return QString::fromUtf16(reinterpret_cast<const ushort *>(data.constData()),
                                data.size() / 2).split(QLatin1Char('\n')).first().toLatin1();
        }
    }

    // special cas for images
    if (format == QLatin1String("image/ppm")) {
        if (a == XA_PIXMAP && data.size() == sizeof(Pixmap)) {
            Pixmap xpm = *((Pixmap*)data.data());
            Display *dpy = display;
            Window r;
            int x,y;
            uint w,h,bw,d;
            if (!xpm)
                return QByteArray();
            XGetGeometry(dpy,xpm, &r,&x,&y,&w,&h,&bw,&d);
            QImageWriter imageWriter;
            GC gc = XCreateGC(dpy, xpm, 0, 0);
            QImage imageToWrite;
            if (d == 1) {
                QBitmap qbm(w,h);
                XCopyArea(dpy,xpm,qbm.handle(),gc,0,0,w,h,0,0);
                imageWriter.setFormat("PBMRAW");
                imageToWrite = qbm.toImage();
            } else {
                QPixmap qpm(w,h);
                XCopyArea(dpy,xpm,qpm.handle(),gc,0,0,w,h,0,0);
                imageWriter.setFormat("PPMRAW");
                imageToWrite = qpm.toImage();
            }
            XFreeGC(dpy,gc);
            QBuffer buf;
            buf.open(QIODevice::WriteOnly);
            imageWriter.setDevice(&buf);
            imageWriter.write(imageToWrite);
            return buf.buffer();
        }
    }
    return QVariant();
}

//$$$ middle of xdndObtainData
Atom QX11Data::xdndMimeAtomForFormat(const QString &format, QVariant::Type requestedType, const QList<Atom> &atoms, QByteArray *encoding)
{
    encoding->clear();

    // find matches for string types
    if (format == QLatin1String("text/plain")) {
        if (atoms.contains(ATOM(UTF8_STRING)))
            return ATOM(UTF8_STRING);
        if (atoms.contains(ATOM(COMPOUND_TEXT)))
            return ATOM(COMPOUND_TEXT);
        if (atoms.contains(ATOM(TEXT)))
            return ATOM(TEXT);
        if (atoms.contains(XA_STRING))
            return XA_STRING;
    }

    // find mathes for uri types
    if (format == QLatin1String("text/uri-list")) {
        Atom a = xdndMimeStringToAtom(QLatin1String("text/x-moz-url"));
        if (a && atoms.contains(a))
            return a;
    }

    // find match for image
    if (format == QLatin1String("image/ppm")) {
        if (atoms.contains(XA_PIXMAP))
            return XA_PIXMAP;
    }

    // for string/text requests try to use a format with a well-defined charset
    // first to avoid encoding problems
    if (requestedType == QVariant::String
        && format.startsWith(QLatin1String("text/"))
        && !format.contains(QLatin1String("charset="))) {

        QString formatWithCharset = format;
        formatWithCharset.append(QLatin1String(";charset=utf-8"));

        Atom a = xdndMimeStringToAtom(formatWithCharset);
        if (a && atoms.contains(a)) {
            *encoding = "utf-8";
            return a;
        }
    }

    Atom a = xdndMimeStringToAtom(format);
    if (a && atoms.contains(a))
        return a;

    return 0;
}

void QX11Data::xdndSetup() {
    QCursorData::initialize();
    qAddPostRoutine(qt_xdnd_cleanup);
}


void qt_xdnd_cleanup()
{
    delete noDropCursor;
    noDropCursor = 0;
    delete copyCursor;
    copyCursor = 0;
    delete moveCursor;
    moveCursor = 0;
    delete linkCursor;
    linkCursor = 0;
    delete defaultPm;
    defaultPm = 0;
    delete xdnd_data.desktop_proxy;
    xdnd_data.desktop_proxy = 0;
    delete xdnd_data.deco;
    xdnd_data.deco = 0;
}


static QWidget *find_child(QWidget *tlw, QPoint & p)
{
    QWidget *widget = tlw;

    p = widget->mapFromGlobal(p);
    bool done = false;
    while (!done) {
        done = true;
        if (((QExtraWidget*)widget)->extraData() &&
             ((QExtraWidget*)widget)->extraData()->xDndProxy != 0)
            break; // stop searching for widgets under the mouse cursor if found widget is a proxy.
        QObjectList children = widget->children();
        if (!children.isEmpty()) {
            for(int i = children.size(); i > 0;) {
                --i;
                QWidget *w = qobject_cast<QWidget *>(children.at(i));
                if (!w)
                    continue;
                if (w->isVisible() &&
                     w->geometry().contains(p) &&
                     !w->isWindow()) {
                    widget = w;
                    done = false;
                    p = widget->mapFromParent(p);
                    break;
                }
            }
        }
    }
    return widget;
}


static bool checkEmbedded(QWidget* w, const XEvent* xe)
{
    if (!w)
        return false;

    if (current_embedding_widget != 0 && current_embedding_widget != w) {
        qt_xdnd_current_target = ((QExtraWidget*)current_embedding_widget)->extraData()->xDndProxy;
        qt_xdnd_current_proxy_target = qt_xdnd_current_target;
        qt_xdnd_send_leave();
        qt_xdnd_current_target = 0;
        qt_xdnd_current_proxy_target = 0;
        current_embedding_widget = 0;
    }

    QWExtra* extra = ((QExtraWidget*)w)->extraData();
    if (extra && extra->xDndProxy != 0) {

        if (current_embedding_widget != w) {

            last_enter_event.xany.window = extra->xDndProxy;
            XSendEvent(X11->display, extra->xDndProxy, False, NoEventMask, &last_enter_event);
            current_embedding_widget = w;
        }

        ((XEvent*)xe)->xany.window = extra->xDndProxy;
        XSendEvent(X11->display, extra->xDndProxy, False, NoEventMask, (XEvent*)xe);
        if (qt_xdnd_current_widget != w) {
            qt_xdnd_current_widget = w;
        }
        return true;
    }
    current_embedding_widget = 0;
    return false;
}

void QX11Data::xdndHandleEnter(QWidget *, const XEvent * xe, bool /*passive*/)
{
    motifdnd_active = false;

    last_enter_event.xclient = xe->xclient;

    const long *l = xe->xclient.data.l;
    int version = (int)(((unsigned long)(l[1])) >> 24);

    if (version > xdnd_version)
        return;

    qt_xdnd_dragsource_xid = l[0];

    int j = 0;
    if (l[1] & 1) {
        // get the types from XdndTypeList
        Atom   type = XNone;
        int f;
        unsigned long n, a;
        unsigned char *retval;
        XGetWindowProperty(X11->display, qt_xdnd_dragsource_xid, ATOM(XdndTypelist), 0,
                           qt_xdnd_max_type, False, XA_ATOM, &type, &f,&n,&a,&retval);
        Atom *data = (Atom *)retval;
        for (; j<qt_xdnd_max_type && j < (int)n; j++) {
            qt_xdnd_types[j] = data[j];