/**************************************************************************** ** ** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies). ** All rights reserved. ** Contact: Nokia Corporation (qt-info@nokia.com) ** ** This file is part of the QtGui module of the Qt Toolkit. ** ** $QT_BEGIN_LICENSE:LGPL$ ** GNU Lesser General Public License Usage ** This file may be used under the terms of the GNU Lesser General Public ** License version 2.1 as published by the Free Software Foundation and ** appearing in the file LICENSE.LGPL included in the packaging of this ** file. Please review the following information to ensure the GNU Lesser ** General Public License version 2.1 requirements will be met: ** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html. ** ** In addition, as a special exception, Nokia gives you certain additional ** rights. These rights are described in the Nokia Qt LGPL Exception ** version 1.1, included in the file LGPL_EXCEPTION.txt in this package. ** ** GNU General Public License Usage ** Alternatively, this file may be used under the terms of the GNU General ** Public License version 3.0 as published by the Free Software Foundation ** and appearing in the file LICENSE.GPL included in the packaging of this ** file. Please review the following information to ensure the GNU General ** Public License version 3.0 requirements will be met: ** http://www.gnu.org/copyleft/gpl.html. ** ** Other Usage ** Alternatively, this file may be used in accordance with the terms and ** conditions contained in a signed written agreement between you and Nokia. ** ** ** ** ** ** $QT_END_LICENSE$ ** ****************************************************************************/ #include "qplatformdefs.h" #include "qapplication.h" #ifndef QT_NO_DRAGANDDROP #include "qwidget.h" #include "qpainter.h" #include "qpixmap.h" #include "qbitmap.h" #include "qdesktopwidget.h" #include "qevent.h" #include "qiodevice.h" #include "qpointer.h" #include "qcursor.h" #include "qelapsedtimer.h" #include "qvariant.h" #include "qvector.h" #include "qurl.h" #include "qdebug.h" #include "qimagewriter.h" #include "qbuffer.h" #include "qtextcodec.h" #include "qdnd_p.h" #include "qapplication_p.h" #include "qt_x11_p.h" #include "qx11info_x11.h" #include "qwidget_p.h" #include "qcursor_p.h" QT_BEGIN_NAMESPACE // #define DND_DEBUG #ifdef DND_DEBUG #define DEBUG qDebug #else #define DEBUG if(0) qDebug #endif #ifdef DND_DEBUG #define DNDDEBUG qDebug() #else #define DNDDEBUG if(0) qDebug() #endif static int findXdndDropTransactionByWindow(Window window) { int at = -1; for (int i = 0; i < X11->dndDropTransactions.count(); ++i) { const QXdndDropTransaction &t = X11->dndDropTransactions.at(i); if (t.target == window || t.proxy_target == window) { at = i; break; } } return at; } static int findXdndDropTransactionByTime(Time timestamp) { int at = -1; for (int i = 0; i < X11->dndDropTransactions.count(); ++i) { const QXdndDropTransaction &t = X11->dndDropTransactions.at(i); if (t.timestamp == timestamp) { at = i; break; } } return at; } // timer used to discard old XdndDrop transactions static int transaction_expiry_timer = -1; enum { XdndDropTransactionTimeout = 5000 }; // 5 seconds static void restartXdndDropExpiryTimer() { if (transaction_expiry_timer != -1) QDragManager::self()->killTimer(transaction_expiry_timer); transaction_expiry_timer = QDragManager::self()->startTimer(XdndDropTransactionTimeout); } // find an ancestor with XdndAware on it static Window findXdndAwareParent(Window window) { Window target = 0; forever { // check if window has XdndAware Atom type = 0; int f; unsigned long n, a; unsigned char *data = 0; if (XGetWindowProperty(X11->display, window, ATOM(XdndAware), 0, 0, False, AnyPropertyType, &type, &f,&n,&a,&data) == Success) { if (data) XFree(data); if (type) { target = window; break; } } // try window's parent Window root; Window parent; Window *children; uint unused; if (!XQueryTree(X11->display, window, &root, &parent, &children, &unused)) break; if (children) XFree(children); if (window == root) break; window = parent; } return target; } // and all this stuff is copied -into- qapp_x11.cpp static void handle_xdnd_position(QWidget *, const XEvent *, bool); static void handle_xdnd_status(QWidget * w, const XEvent * xe, bool /*passive*/); const int xdnd_version = 5; static Qt::DropAction xdndaction_to_qtaction(Atom atom) { if (atom == ATOM(XdndActionCopy) || atom == 0) return Qt::CopyAction; if (atom == ATOM(XdndActionLink)) return Qt::LinkAction; if (atom == ATOM(XdndActionMove)) return Qt::MoveAction; return Qt::CopyAction; } static int qtaction_to_xdndaction(Qt::DropAction a) { switch (a) { case Qt::CopyAction: return ATOM(XdndActionCopy); case Qt::LinkAction: return ATOM(XdndActionLink); case Qt::MoveAction: case Qt::TargetMoveAction: return ATOM(XdndActionMove); case Qt::IgnoreAction: return XNone; default: return ATOM(XdndActionCopy); } } // clean up the stuff used. static void qt_xdnd_cleanup(); static void qt_xdnd_send_leave(); // real variables: // xid of current drag source static Atom qt_xdnd_dragsource_xid = 0; // the types in this drop. 100 is no good, but at least it's big. const int qt_xdnd_max_type = 100; static Atom qt_xdnd_types[qt_xdnd_max_type + 1]; // timer used when target wants "continuous" move messages (eg. scroll) static int heartbeat = -1; // rectangle in which the answer will be the same static QRect qt_xdnd_source_sameanswer; // top-level window we sent position to last. static Window qt_xdnd_current_target; // window to send events to (always valid if qt_xdnd_current_target) static Window qt_xdnd_current_proxy_target; static Time qt_xdnd_source_current_time; // widget we forwarded position to last, and local position static QPointer qt_xdnd_current_widget; static QPoint qt_xdnd_current_position; // timestamp from the XdndPosition and XdndDrop static Time qt_xdnd_target_current_time; // screen number containing the pointer... -1 means default static int qt_xdnd_current_screen = -1; // state of dragging... true if dragging, false if not bool qt_xdnd_dragging = false; static bool waiting_for_status = false; // used to preset each new QDragMoveEvent static Qt::DropAction last_target_accepted_action = Qt::IgnoreAction; // Shift/Ctrl handling, and final drop status static Qt::DropAction global_accepted_action = Qt::CopyAction; static Qt::DropActions possible_actions = Qt::IgnoreAction; // for embedding only static QWidget* current_embedding_widget = 0; static XEvent last_enter_event; // cursors static QCursor *noDropCursor = 0; static QCursor *moveCursor = 0; static QCursor *copyCursor = 0; static QCursor *linkCursor = 0; static QPixmap *defaultPm = 0; static const int default_pm_hotx = -2; static const int default_pm_hoty = -16; 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" }; class QShapedPixmapWidget : public QWidget { Q_OBJECT public: QShapedPixmapWidget(QWidget* w) : QWidget(w, Qt::Tool | Qt::FramelessWindowHint | Qt::X11BypassWindowManagerHint | Qt::BypassGraphicsProxyWidget) { setAttribute(Qt::WA_X11NetWmWindowTypeDND); } void setPixmap(const QPixmap &pm) { QBitmap mask = pm.mask(); if (!mask.isNull()) { setMask(mask); } else { clearMask(); } resize(pm.width(),pm.height()); pixmap = pm; update(); } QPoint pm_hot; protected: QPixmap pixmap; void paintEvent(QPaintEvent*) { QPainter p(this); p.drawPixmap(0, 0, pixmap); } }; #include "qdnd_x11.moc" struct XdndData { QShapedPixmapWidget *deco; QWidget* desktop_proxy; }; static XdndData xdnd_data = { 0, 0 }; class QExtraWidget : public QWidget { Q_DECLARE_PRIVATE(QWidget) public: inline QWExtra* extraData(); inline QTLWExtra* topData(); }; inline QWExtra* QExtraWidget::extraData() { return d_func()->extraData(); } inline QTLWExtra* QExtraWidget::topData() { return d_func()->topData(); } static WId xdndProxy(WId w) { Atom type = XNone; int f; unsigned long n, a; unsigned char *retval = 0; XGetWindowProperty(X11->display, w, ATOM(XdndProxy), 0, 1, False, XA_WINDOW, &type, &f,&n,&a,&retval); WId *proxy_id_ptr = (WId *)retval; WId proxy_id = 0; if (type == XA_WINDOW && proxy_id_ptr) { proxy_id = *proxy_id_ptr; XFree(proxy_id_ptr); proxy_id_ptr = 0; // Already exists. Real? X11->ignoreBadwindow(); XGetWindowProperty(X11->display, proxy_id, ATOM(XdndProxy), 0, 1, False, XA_WINDOW, &type, &f,&n,&a,&retval); proxy_id_ptr = (WId *)retval; if (X11->badwindow() || type != XA_WINDOW || !proxy_id_ptr || *proxy_id_ptr != proxy_id) // Bogus - we will overwrite. proxy_id = 0; } if (proxy_id_ptr) XFree(proxy_id_ptr); return proxy_id; } static bool xdndEnable(QWidget* w, bool on) { DNDDEBUG << "xdndEnable" << w << on; if (on) { QWidget * xdnd_widget = 0; if ((w->windowType() == Qt::Desktop)) { if (xdnd_data.desktop_proxy) // *WE* already have one. return false; // As per Xdnd4, use XdndProxy XGrabServer(X11->display); Q_ASSERT(w->testAttribute(Qt::WA_WState_Created)); WId proxy_id = xdndProxy(w->effectiveWinId()); if (!proxy_id) { xdnd_widget = xdnd_data.desktop_proxy = new QWidget; proxy_id = xdnd_data.desktop_proxy->effectiveWinId(); XChangeProperty (X11->display, w->effectiveWinId(), ATOM(XdndProxy), XA_WINDOW, 32, PropModeReplace, (unsigned char *)&proxy_id, 1); XChangeProperty (X11->display, proxy_id, ATOM(XdndProxy), XA_WINDOW, 32, PropModeReplace, (unsigned char *)&proxy_id, 1); } XUngrabServer(X11->display); } else { xdnd_widget = w->window(); } if (xdnd_widget) { DNDDEBUG << "setting XdndAware for" << xdnd_widget << xdnd_widget->effectiveWinId(); Atom atm = (Atom)xdnd_version; Q_ASSERT(xdnd_widget->testAttribute(Qt::WA_WState_Created)); XChangeProperty(X11->display, xdnd_widget->effectiveWinId(), ATOM(XdndAware), XA_ATOM, 32, PropModeReplace, (unsigned char *)&atm, 1); return true; } else { return false; } } else { if ((w->windowType() == Qt::Desktop)) { XDeleteProperty(X11->display, w->internalWinId(), ATOM(XdndProxy)); delete xdnd_data.desktop_proxy; xdnd_data.desktop_proxy = 0; } else { DNDDEBUG << "not deleting XDndAware"; } return true; } } QByteArray QX11Data::xdndAtomToString(Atom a) { if (!a) return 0; if (a == XA_STRING || a == ATOM(UTF8_STRING)) { return "text/plain"; // some Xdnd clients are dumb } char *atom = XGetAtomName(display, a); QByteArray result = atom; XFree(atom); return result; } Atom QX11Data::xdndStringToAtom(const char *mimeType) { if (!mimeType || !*mimeType) return 0; return XInternAtom(display, mimeType, False); } //$$$ QString QX11Data::xdndMimeAtomToString(Atom a) { QString atomName; if (a) { char *atom = XGetAtomName(display, a); atomName = QString::fromLatin1(atom); XFree(atom); } return atomName; } //$$$ 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); ret = true; 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(mozUri.utf16()), mozUri.length() * 2); ret = true; } else if ((a == XA_PIXMAP || a == XA_BITMAP) && mimeData->hasImage()) { QPixmap pm = qvariant_cast(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; ret = true; } } else { DEBUG("QClipboard: xdndMimeDataForAtom(): converting to type '%s' is not supported", qPrintable(atomName)); } } return ret && data != 0; } //$$$ QList QX11Data::xdndMimeAtomsForFormat(const QString &format) { QList atoms; atoms.append(xdndMimeStringToAtom(format)); // special cases for strings if (format == QLatin1String("text/plain")) { atoms.append(ATOM(UTF8_STRING)); atoms.append(XA_STRING); atoms.append(ATOM(TEXT)); atoms.append(ATOM(COMPOUND_TEXT)); } // special cases for uris if (format == QLatin1String("text/uri-list")) { atoms.append(xdndMimeStringToAtom(QLatin1String("text/x-moz-url"))); } //special cases for images if (format == QLatin1String("image/ppm")) atoms.append(XA_PIXMAP); if (format == QLatin1String("image/pbm")) atoms.append(XA_BITMAP); return atoms; } //$$$ 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 // 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::fromRawData((const QChar *)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()); if (!xpm) return QByteArray(); QPixmap qpm = QPixmap::fromX11Pixmap(xpm); QImageWriter imageWriter; imageWriter.setFormat("PPMRAW"); QImage imageToWrite = qpm.toImage(); 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 matches for uri types if (format == QLatin1String("text/uri-list")) { Atom a = xdndMimeStringToAtom(format); if (a && atoms.contains(a)) return a; 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->testAttribute(Qt::WA_TransparentForMouseEvents)) 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 = 0; XGetWindowProperty(X11->display, qt_xdnd_dragsource_xid, ATOM(XdndTypelist), 0, qt_xdnd_max_type, False, XA_ATOM, &type, &f,&n,&a,&retval); if (retval) { Atom *data = (Atom *)retval; for (; j<qt_xdnd_max_type && j < (int)n; j++) { qt_xdnd_types[j] = data[j]; } XFree((uchar*)data); } } else { // get the types from the message int i; for(i=2; i < 5; i++) { qt_xdnd_types[j++] = l[i]; } } qt_xdnd_types[j] = 0; } static void handle_xdnd_position(QWidget *w, const XEvent * xe, bool passive) { const unsigned long *l = (const unsigned long *)xe->xclient.data.l; QPoint p((l[2] & 0xffff0000) >> 16, l[2] & 0x0000ffff); QWidget * c = find_child(w, p); // changes p to to c-local coordinates if (!passive && checkEmbedded(c, xe)) return; if (!c || (!c->acceptDrops() && (c->windowType() == Qt::Desktop))) return; if (l[0] != qt_xdnd_dragsource_xid) { DEBUG("xdnd drag position from unexpected source (%08lx not %08lx)", l[0], qt_xdnd_dragsource_xid); return; } // timestamp from the source if (l[3] != 0) { // Some X server/client combination swallow the first 32 bit and // interpret a set bit 31 as negative sign. qt_xdnd_target_current_time = X11->userTime = ((sizeof(Time) == 8 && xe->xclient.data.l[3] < 0) ? uint(l[3]) : l[3]); } QDragManager *manager = QDragManager::self(); QMimeData *dropData = manager->object ? manager->dragPrivate()->data : manager->dropData; XClientMessageEvent response; response.type = ClientMessage; response.window = qt_xdnd_dragsource_xid; response.format = 32; response.message_type = ATOM(XdndStatus); response.data.l[0] = w->effectiveWinId(); response.data.l[1] = 0; // flags response.data.l[2] = 0; // x, y response.data.l[3] = 0; // w, h response.data.l[4] = 0; // action if (!passive) { // otherwise just reject while (c && !c->acceptDrops() && !c->isWindow()) { p = c->mapToParent(p); c = c->parentWidget(); } QWidget *target_widget = c && c->acceptDrops() ? c : 0; QRect answerRect(c->mapToGlobal(p), QSize(1,1)); if (manager->object) { possible_actions = manager->dragPrivate()->possible_actions; } else { possible_actions = Qt::DropActions(xdndaction_to_qtaction(l[4])); // possible_actions |= Qt::CopyAction; } QDragMoveEvent me(p, possible_actions, dropData, QApplication::mouseButtons(), QApplication::keyboardModifiers()); Qt::DropAction accepted_action = Qt::IgnoreAction; if (target_widget != qt_xdnd_current_widget) { if (qt_xdnd_current_widget) { QDragLeaveEvent e; QApplication::sendEvent(qt_xdnd_current_widget, &e); } if (qt_xdnd_current_widget != target_widget) { qt_xdnd_current_widget = target_widget; } if (target_widget) { qt_xdnd_current_position = p; last_target_accepted_action = Qt::IgnoreAction; QDragEnterEvent de(p, possible_actions, dropData, QApplication::mouseButtons(), QApplication::keyboardModifiers()); QApplication::sendEvent(target_widget, &de); if (de.isAccepted() && de.dropAction() != Qt::IgnoreAction) last_target_accepted_action = de.dropAction(); } } DEBUG() << "qt_handle_xdnd_position action=" << X11->xdndAtomToString(l[4]); if (!target_widget) { answerRect = QRect(p, QSize(1, 1)); } else { qt_xdnd_current_widget = c; qt_xdnd_current_position = p; if (last_target_accepted_action != Qt::IgnoreAction) { me.setDropAction(last_target_accepted_action); me.accept(); } QApplication::sendEvent(c, &me); if (me.isAccepted()) { response.data.l[1] = 1; // yes accepted_action = me.dropAction(); last_target_accepted_action = accepted_action; } else { response.data.l[0] = 0; last_target_accepted_action = Qt::IgnoreAction; } answerRect = me.answerRect().intersected(c->rect()); } answerRect = QRect(c->mapToGlobal(answerRect.topLeft()), answerRect.size()); if (answerRect.left() < 0) answerRect.setLeft(0); if (answerRect.right() > 4096) answerRect.setRight(4096); if (answerRect.top() < 0) answerRect.setTop(0); if (answerRect.bottom() > 4096) answerRect.setBottom(4096); if (answerRect.width() < 0) answerRect.setWidth(0); if (answerRect.height() < 0) answerRect.setHeight(0); response.data.l[2] = (answerRect.x() << 16) + answerRect.y(); response.data.l[3] = (answerRect.width() << 16) + answerRect.height(); response.data.l[4] = qtaction_to_xdndaction(accepted_action); } // reset qt_xdnd_target_current_time = CurrentTime; QWidget * source = QWidget::find(qt_xdnd_dragsource_xid); if (source && (source->windowType() == Qt::Desktop) && !source->acceptDrops()) source = 0; DEBUG() << "sending XdndStatus"; if (source) handle_xdnd_status(source, (const XEvent *)&response, passive); else XSendEvent(X11->display, qt_xdnd_dragsource_xid, False, NoEventMask, (XEvent*)&response); } static Bool xdnd_position_scanner(Display *, XEvent *event, XPointer) { if (event->type != ClientMessage) return false; XClientMessageEvent *ev = &event->xclient; if (ev->message_type == ATOM(XdndPosition)) return true; return false; } void QX11Data::xdndHandlePosition(QWidget * w, const XEvent * xe, bool passive) { DEBUG("xdndHandlePosition"); while (XCheckIfEvent(X11->display, (XEvent *)xe, xdnd_position_scanner, 0)) ; handle_xdnd_position(w, xe, passive); } static void handle_xdnd_status(QWidget *, const XEvent * xe, bool) { const unsigned long *l = (const unsigned long *)xe->xclient.data.l; // ignore late status messages if (l[0] && l[0] != qt_xdnd_current_proxy_target) return; Qt::DropAction newAction = (l[1] & 0x1) ? xdndaction_to_qtaction(l[4]) : Qt::IgnoreAction; if ((int)(l[1] & 2) == 0) { QPoint p((l[2] & 0xffff0000) >> 16, l[2] & 0x0000ffff); QSize s((l[3] & 0xffff0000) >> 16, l[3] & 0x0000ffff); qt_xdnd_source_sameanswer = QRect(p, s); } else { qt_xdnd_source_sameanswer = QRect(); } QDragManager *manager = QDragManager::self(); manager->willDrop = (l[1] & 0x1); if (global_accepted_action != newAction) manager->emitActionChanged(newAction); global_accepted_action = newAction; manager->updateCursor(); waiting_for_status = false; } static Bool xdnd_status_scanner(Display *, XEvent *event, XPointer) { if (event->type != ClientMessage) return false; XClientMessageEvent *ev = &event->xclient; if (ev->message_type == ATOM(XdndStatus)) return true; return false; } void QX11Data::xdndHandleStatus(QWidget * w, const XEvent * xe, bool passive) { DEBUG("xdndHandleStatus"); while (XCheckIfEvent(X11->display, (XEvent *)xe, xdnd_status_scanner, 0)) ; handle_xdnd_status(w, xe, passive); DEBUG("xdndHandleStatus end"); } void QX11Data::xdndHandleLeave(QWidget *w, const XEvent * xe, bool /*passive*/) { DEBUG("xdnd leave"); if (!qt_xdnd_current_widget || w->window() != qt_xdnd_current_widget->window()) { return; // sanity } if (checkEmbedded(current_embedding_widget, xe)) { current_embedding_widget = 0; qt_xdnd_current_widget = 0; return; } const unsigned long *l = (const unsigned long *)xe->xclient.data.l; QDragLeaveEvent e; QApplication::sendEvent(qt_xdnd_current_widget, &e); if (l[0] != qt_xdnd_dragsource_xid) { // This often happens - leave other-process window quickly DEBUG("xdnd drag leave from unexpected source (%08lx not %08lx", l[0], qt_xdnd_dragsource_xid); qt_xdnd_current_widget = 0; return; } qt_xdnd_dragsource_xid = 0; qt_xdnd_types[0] = 0; qt_xdnd_current_widget = 0; } void qt_xdnd_send_leave() { if (!qt_xdnd_current_target) return; QDragManager *manager = QDragManager::self(); XClientMessageEvent leave; leave.type = ClientMessage; leave.window = qt_xdnd_current_target; leave.format = 32; leave.message_type = ATOM(XdndLeave); leave.data.l[0] = manager->dragPrivate()->source->effectiveWinId(); leave.data.l[1] = 0; // flags leave.data.l[2] = 0; // x, y leave.data.l[3] = 0; // w, h leave.data.l[4] = 0; // just null QWidget * w = QWidget::find(qt_xdnd_current_proxy_target); if (w && (w->windowType() == Qt::Desktop) && !w->acceptDrops()) w = 0; if (w) X11->xdndHandleLeave(w, (const XEvent *)&leave, false); else XSendEvent(X11->display, qt_xdnd_current_proxy_target, False, NoEventMask, (XEvent*)&leave); // reset the drag manager state manager->willDrop = false; if (global_accepted_action != Qt::IgnoreAction) manager->emitActionChanged(Qt::IgnoreAction); global_accepted_action = Qt::IgnoreAction; manager->updateCursor(); qt_xdnd_current_target = 0; qt_xdnd_current_proxy_target = 0; qt_xdnd_source_current_time = 0; waiting_for_status = false; } void QX11Data::xdndHandleDrop(QWidget *, const XEvent * xe, bool passive) { DEBUG("xdndHandleDrop"); if (!qt_xdnd_current_widget) { qt_xdnd_dragsource_xid = 0; return; // sanity } if (!passive && checkEmbedded(qt_xdnd_current_widget, xe)){ current_embedding_widget = 0; qt_xdnd_dragsource_xid = 0; qt_xdnd_current_widget = 0; return; } const unsigned long *l = (const unsigned long *)xe->xclient.data.l; QDragManager *manager = QDragManager::self(); DEBUG("xdnd drop"); if (l[0] != qt_xdnd_dragsource_xid) { DEBUG("xdnd drop from unexpected source (%08lx not %08lx", l[0], qt_xdnd_dragsource_xid); return; } // update the "user time" from the timestamp in the event. if (l[2] != 0) { // Some X server/client combination swallow the first 32 bit and // interpret a set bit 31 as negative sign. qt_xdnd_target_current_time = X11->userTime = ((sizeof(Time) == 8 && xe->xclient.data.l[2] < 0) ? uint(l[2]) : l[2]); } if (!passive) { // this could be a same-application drop, just proxied due to // some XEMBEDding, so try to find the real QMimeData used // based on the timestamp for this drop. QMimeData *dropData = 0; int at = findXdndDropTransactionByTime(qt_xdnd_target_current_time); if (at != -1) dropData = QDragManager::dragPrivate(X11->dndDropTransactions.at(at).object)->data; // if we can't find it, then use the data in the drag manager if (!dropData) dropData = (manager->object) ? manager->dragPrivate()->data : manager->dropData; // Drop coming from another app? Update keyboard modifiers. if (!qt_xdnd_dragging) { QApplicationPrivate::modifier_buttons = QApplication::queryKeyboardModifiers(); } QDropEvent de(qt_xdnd_current_position, possible_actions, dropData, QApplication::mouseButtons(), QApplication::keyboardModifiers()); QApplication::sendEvent(qt_xdnd_current_widget, &de); if (!de.isAccepted()) { // Ignore a failed drag global_accepted_action = Qt::IgnoreAction; } else { global_accepted_action = de.dropAction(); } XClientMessageEvent finished; finished.type = ClientMessage; finished.window = qt_xdnd_dragsource_xid; finished.format = 32; finished.message_type = ATOM(XdndFinished); DNDDEBUG << "xdndHandleDrop" << "qt_xdnd_current_widget" << qt_xdnd_current_widget << (qt_xdnd_current_widget ? qt_xdnd_current_widget->effectiveWinId() : 0) << "t_xdnd_current_widget->window()" << (qt_xdnd_current_widget ? qt_xdnd_current_widget->window() : 0) << (qt_xdnd_current_widget ? qt_xdnd_current_widget->window()->internalWinId() : 0); finished.data.l[0] = qt_xdnd_current_widget?qt_xdnd_current_widget->window()->internalWinId():0; finished.data.l[1] = de.isAccepted() ? 1 : 0; // flags finished.data.l[2] = qtaction_to_xdndaction(global_accepted_action); XSendEvent(X11->display, qt_xdnd_dragsource_xid, False, NoEventMask, (XEvent*)&finished); } else { QDragLeaveEvent e; QApplication::sendEvent(qt_xdnd_current_widget, &e); } qt_xdnd_dragsource_xid = 0; qt_xdnd_current_widget = 0; waiting_for_status = false; // reset qt_xdnd_target_current_time = CurrentTime; } void QX11Data::xdndHandleFinished(QWidget *, const XEvent * xe, bool passive) { DEBUG("xdndHandleFinished"); const unsigned long *l = (const unsigned long *)xe->xclient.data.l; DNDDEBUG << "xdndHandleFinished, l[0]" << l[0] << "qt_xdnd_current_target" << qt_xdnd_current_target << "qt_xdnd_current_proxy_targe" << qt_xdnd_current_proxy_target; if (l[0]) { int at = findXdndDropTransactionByWindow(l[0]); if (at != -1) { restartXdndDropExpiryTimer(); QXdndDropTransaction t = X11->dndDropTransactions.takeAt(at); QDragManager *manager = QDragManager::self(); Window target = qt_xdnd_current_target; Window proxy_target = qt_xdnd_current_proxy_target; QWidget *embedding_widget = current_embedding_widget; QDrag *currentObject = manager->object; qt_xdnd_current_target = t.target; qt_xdnd_current_proxy_target = t.proxy_target; current_embedding_widget = t.embedding_widget; manager->object = t.object; if (!passive) (void) checkEmbedded(qt_xdnd_current_widget, xe); current_embedding_widget = 0; qt_xdnd_current_target = 0; qt_xdnd_current_proxy_target = 0; if (t.object) t.object->deleteLater(); qt_xdnd_current_target = target; qt_xdnd_current_proxy_target = proxy_target; current_embedding_widget = embedding_widget; manager->object = currentObject; } } waiting_for_status = false; } void QDragManager::timerEvent(QTimerEvent* e) { if (e->timerId() == heartbeat && qt_xdnd_source_sameanswer.isNull()) { move(QCursor::pos()); } else if (e->timerId() == transaction_expiry_timer) { for (int i = 0; i < X11->dndDropTransactions.count(); ++i) { const QXdndDropTransaction &t = X11->dndDropTransactions.at(i); if (t.targetWidget) { // dnd within the same process, don't delete these continue; } t.object->deleteLater(); X11->dndDropTransactions.removeAt(i--); } killTimer(transaction_expiry_timer); transaction_expiry_timer = -1; } } bool QDragManager::eventFilter(QObject * o, QEvent * e) { if (beingCancelled) { if (e->type() == QEvent::KeyRelease && ((QKeyEvent*)e)->key() == Qt::Key_Escape) { qApp->removeEventFilter(this); Q_ASSERT(object == 0); beingCancelled = false; eventLoop->exit(); return true; // block the key release } return false; } Q_ASSERT(object != 0); if (!o->isWidgetType()) return false; if (e->type() == QEvent::MouseMove) { QMouseEvent* me = (QMouseEvent *)e; move(me->globalPos()); return true; } else if (e->type() == QEvent::MouseButtonRelease) { DEBUG("pre drop"); qApp->removeEventFilter(this); if (willDrop) drop(); else cancel(); DEBUG("drop, resetting object"); beingCancelled = false; eventLoop->exit(); return true; } if (e->type() == QEvent::ShortcutOverride) { // prevent accelerators from firing while dragging e->accept(); return true; } if (e->type() == QEvent::KeyPress || e->type() == QEvent::KeyRelease) { QKeyEvent *ke = ((QKeyEvent*)e); if (ke->key() == Qt::Key_Escape && e->type() == QEvent::KeyPress) { cancel(); qApp->removeEventFilter(this); beingCancelled = false; eventLoop->exit(); } else { qt_xdnd_source_sameanswer = QRect(); // force move move(QCursor::pos()); } return true; // Eat all key events } // ### We bind modality to widgets, so we have to do this // ### "manually". // DnD is modal - eat all other interactive events switch (e->type()) { case QEvent::MouseButtonPress: case QEvent::MouseButtonRelease: case QEvent::MouseButtonDblClick: case QEvent::MouseMove: case QEvent::KeyPress: case QEvent::KeyRelease: case QEvent::Wheel: case QEvent::ShortcutOverride: #ifdef QT3_SUPPORT case QEvent::Accel: case QEvent::AccelAvailable: #endif return true; default: return false; } } void QDragManager::updateCursor() { if (!noDropCursor) { #ifndef QT_NO_CURSOR noDropCursor = new QCursor(Qt::ForbiddenCursor); moveCursor = new QCursor(Qt::DragMoveCursor); copyCursor = new QCursor(Qt::DragCopyCursor); linkCursor = new QCursor(Qt::DragLinkCursor); #endif } QCursor *c; if (willDrop) { if (global_accepted_action == Qt::CopyAction) { c = copyCursor; } else if (global_accepted_action == Qt::LinkAction) { c = linkCursor; } else { c = moveCursor; } if (xdnd_data.deco) { xdnd_data.deco->show(); xdnd_data.deco->raise(); } } else { c = noDropCursor; //if (qt_xdnd_deco) // qt_xdnd_deco->hide(); } #ifndef QT_NO_CURSOR if (c) qApp->changeOverrideCursor(*c); #endif } void QDragManager::cancel(bool deleteSource) { DEBUG("QDragManager::cancel"); Q_ASSERT(heartbeat != -1); killTimer(heartbeat); heartbeat = -1; beingCancelled = true; qt_xdnd_dragging = false; if (qt_xdnd_current_target) qt_xdnd_send_leave(); #ifndef QT_NO_CURSOR if (restoreCursor) { QApplication::restoreOverrideCursor(); restoreCursor = false; } #endif if (deleteSource && object) object->deleteLater(); object = 0; qDeleteInEventHandler(xdnd_data.deco); xdnd_data.deco = 0; global_accepted_action = Qt::IgnoreAction; } static Window findRealWindow(const QPoint & pos, Window w, int md) { if (xdnd_data.deco && w == xdnd_data.deco->effectiveWinId()) return 0; if (md) { X11->ignoreBadwindow(); XWindowAttributes attr; XGetWindowAttributes(X11->display, w, &attr); if (X11->badwindow()) return 0; if (attr.map_state == IsViewable && QRect(attr.x,attr.y,attr.width,attr.height).contains(pos)) { { Atom type = XNone; int f; unsigned long n, a; unsigned char *data; XGetWindowProperty(X11->display, w, ATOM(XdndAware), 0, 0, False, AnyPropertyType, &type, &f,&n,&a,&data); if (data) XFree(data); if (type) return w; } Window r, p; Window* c; uint nc; if (XQueryTree(X11->display, w, &r, &p, &c, &nc)) { r=0; for (uint i=nc; !r && i--;) { r = findRealWindow(pos-QPoint(attr.x,attr.y), c[i], md-1); } XFree(c); if (r) return r; // We didn't find a client window! Just use the // innermost window. } // No children! return w; } } return 0; } void QDragManager::move(const QPoint & globalPos) { #ifdef QT_NO_CURSOR Q_UNUSED(globalPos); return; #else DEBUG() << "QDragManager::move enter"; if (!object) { // perhaps the target crashed? return; } int screen = QCursor::x11Screen(); if ((qt_xdnd_current_screen == -1 && screen != X11->defaultScreen) || (screen != qt_xdnd_current_screen)) { // recreate the pixmap on the new screen... delete xdnd_data.deco; QWidget* parent = object->source()->window()->x11Info().screen() == screen ? object->source()->window() : QApplication::desktop()->screen(screen); xdnd_data.deco = new QShapedPixmapWidget(parent); if (!QWidget::mouseGrabber()) { updatePixmap(); xdnd_data.deco->grabMouse(); } } xdnd_data.deco->move(QCursor::pos() - xdnd_data.deco->pm_hot); if (qt_xdnd_source_sameanswer.contains(globalPos) && qt_xdnd_source_sameanswer.isValid()) return; qt_xdnd_current_screen = screen; Window rootwin = QX11Info::appRootWindow(qt_xdnd_current_screen); Window target = 0; int lx = 0, ly = 0; if (!XTranslateCoordinates(X11->display, rootwin, rootwin, globalPos.x(), globalPos.y(), &lx, &ly, &target)) // some weird error... return; if (target == rootwin) { // Ok. } else if (target) { //me Window src = rootwin; while (target != 0) { DNDDEBUG << "checking target for XdndAware" << QWidget::find(target) << target; int lx2, ly2; Window t; // translate coordinates if (!XTranslateCoordinates(X11->display, src, target, lx, ly, &lx2, &ly2, &t)) { target = 0; break; } lx = lx2; ly = ly2; src = target; // check if it has XdndAware Atom type = 0; int f; unsigned long n, a; unsigned char *data = 0; XGetWindowProperty(X11->display, target, ATOM(XdndAware), 0, 0, False, AnyPropertyType, &type, &f,&n,&a,&data); if (data) XFree(data); if (type) { DNDDEBUG << "Found XdndAware on " << QWidget::find(target) << target; break; } // find child at the coordinates if (!XTranslateCoordinates(X11->display, src, src, lx, ly, &lx2, &ly2, &target)) { target = 0; break; } } if (xdnd_data.deco && (!target || target == xdnd_data.deco->effectiveWinId())) { DNDDEBUG << "need to find real window"; target = findRealWindow(globalPos, rootwin, 6); DNDDEBUG << "real window found" << QWidget::find(target) << target; } } QWidget* w; if (target) { w = QWidget::find((WId)target); if (w && (w->windowType() == Qt::Desktop) && !w->acceptDrops()) w = 0; } else { w = 0; target = rootwin; } DNDDEBUG << "and the final target is " << QWidget::find(target) << target; DNDDEBUG << "the widget w is" << w; WId proxy_target = xdndProxy(target); if (!proxy_target) proxy_target = target; int target_version = 1; if (proxy_target) { Atom type = XNone; int r, f; unsigned long n, a; unsigned char *retval; X11->ignoreBadwindow(); r = XGetWindowProperty(X11->display, proxy_target, ATOM(XdndAware), 0, 1, False, AnyPropertyType, &type, &f,&n,&a,&retval); int *tv = (int *)retval; if (r != Success || X11->badwindow()) { target = 0; } else { target_version = qMin(xdnd_version,tv ? *tv : 1); if (tv) XFree(tv); // if (!(!X11->badwindow() && type)) // target = 0; } } if (target != qt_xdnd_current_target) { if (qt_xdnd_current_target) qt_xdnd_send_leave(); qt_xdnd_current_target = target; qt_xdnd_current_proxy_target = proxy_target; if (target) { QVector<Atom> types; int flags = target_version << 24; QStringList fmts = QInternalMimeData::formatsHelper(dragPrivate()->data); for (int i = 0; i < fmts.size(); ++i) { QList<Atom> atoms = X11->xdndMimeAtomsForFormat(fmts.at(i)); for (int j = 0; j < atoms.size(); ++j) { if (!types.contains(atoms.at(j))) types.append(atoms.at(j)); } } if (types.size() > 3) { XChangeProperty(X11->display, dragPrivate()->source->effectiveWinId(), ATOM(XdndTypelist), XA_ATOM, 32, PropModeReplace, (unsigned char *)types.data(), types.size()); flags |= 0x0001; } XClientMessageEvent enter; enter.type = ClientMessage; enter.window = target; enter.format = 32; enter.message_type = ATOM(XdndEnter); enter.data.l[0] = dragPrivate()->source->effectiveWinId(); enter.data.l[1] = flags; enter.data.l[2] = types.size()>0 ? types.at(0) : 0; enter.data.l[3] = types.size()>1 ? types.at(1) : 0; enter.data.l[4] = types.size()>2 ? types.at(2) : 0; // provisionally set the rectangle to 5x5 pixels... qt_xdnd_source_sameanswer = QRect(globalPos.x() - 2, globalPos.y() -2 , 5, 5); DEBUG("sending Xdnd enter"); if (w) X11->xdndHandleEnter(w, (const XEvent *)&enter, false); else if (target) XSendEvent(X11->display, proxy_target, False, NoEventMask, (XEvent*)&enter); waiting_for_status = false; } } if (waiting_for_status) return; if (target) { waiting_for_status = true; XClientMessageEvent move; move.type = ClientMessage; move.window = target; move.format = 32; move.message_type = ATOM(XdndPosition); move.window = target; move.data.l[0] = dragPrivate()->source->effectiveWinId(); move.data.l[1] = 0; // flags move.data.l[2] = (globalPos.x() << 16) + globalPos.y(); move.data.l[3] = X11->time; move.data.l[4] = qtaction_to_xdndaction(defaultAction(dragPrivate()->possible_actions, QApplication::keyboardModifiers())); DEBUG("sending Xdnd position"); qt_xdnd_source_current_time = X11->time; if (w) handle_xdnd_position(w, (const XEvent *)&move, false); else XSendEvent(X11->display, proxy_target, False, NoEventMask, (XEvent*)&move); } else { if (willDrop) { willDrop = false; updateCursor(); } } DEBUG() << "QDragManager::move leave"; #endif } void QDragManager::drop() { Q_ASSERT(heartbeat != -1); killTimer(heartbeat); heartbeat = -1; qt_xdnd_dragging = false; if (!qt_xdnd_current_target) return; qDeleteInEventHandler(xdnd_data.deco); xdnd_data.deco = 0; XClientMessageEvent drop; drop.type = ClientMessage; drop.window = qt_xdnd_current_target; drop.format = 32; drop.message_type = ATOM(XdndDrop); drop.data.l[0] = dragPrivate()->source->effectiveWinId(); drop.data.l[1] = 0; // flags drop.data.l[2] = X11->time; drop.data.l[3] = 0; drop.data.l[4] = 0; QWidget * w = QWidget::find(qt_xdnd_current_proxy_target); if (w && (w->windowType() == Qt::Desktop) && !w->acceptDrops()) w = 0; QXdndDropTransaction t = { X11->time, qt_xdnd_current_target, qt_xdnd_current_proxy_target, w, current_embedding_widget, object }; X11->dndDropTransactions.append(t); restartXdndDropExpiryTimer(); if (w) X11->xdndHandleDrop(w, (const XEvent *)&drop, false); else XSendEvent(X11->display, qt_xdnd_current_proxy_target, False, NoEventMask, (XEvent*)&drop); qt_xdnd_current_target = 0; qt_xdnd_current_proxy_target = 0; qt_xdnd_source_current_time = 0; current_embedding_widget = 0; object = 0; #ifndef QT_NO_CURSOR if (restoreCursor) { QApplication::restoreOverrideCursor(); restoreCursor = false; } #endif } bool QX11Data::xdndHandleBadwindow() { if (qt_xdnd_current_target) { QDragManager *manager = QDragManager::self(); if (manager->object) { qt_xdnd_current_target = 0; qt_xdnd_current_proxy_target = 0; manager->object->deleteLater(); manager->object = 0; delete xdnd_data.deco; xdnd_data.deco = 0; return true; } } if (qt_xdnd_dragsource_xid) { qt_xdnd_dragsource_xid = 0; if (qt_xdnd_current_widget) { QApplication::postEvent(qt_xdnd_current_widget, new QDragLeaveEvent); qt_xdnd_current_widget = 0; } return true; } return false; } void QX11Data::xdndHandleSelectionRequest(const XSelectionRequestEvent * req) { if (!req) return; XEvent evt; evt.xselection.type = SelectionNotify; evt.xselection.display = req->display; evt.xselection.requestor = req->requestor; evt.xselection.selection = req->selection; evt.xselection.target = XNone; evt.xselection.property = XNone; evt.xselection.time = req->time; QDragManager *manager = QDragManager::self(); QDrag *currentObject = manager->object; // which transaction do we use? (note: -2 means use current manager->object) int at = -1; // figure out which data the requestor is really interested in if (manager->object && req->time == qt_xdnd_source_current_time) { // requestor wants the current drag data at = -2; } else { // if someone has requested data in response to XdndDrop, find the corresponding transaction. the // spec says to call XConvertSelection() using the timestamp from the XdndDrop at = findXdndDropTransactionByTime(req->time); if (at == -1) { // no dice, perhaps the client was nice enough to use the same window id in XConvertSelection() // that we sent the XdndDrop event to. at = findXdndDropTransactionByWindow(req->requestor); } if (at == -1 && req->time == CurrentTime) { // previous Qt versions always requested the data on a child of the target window // using CurrentTime... but it could be asking for either drop data or the current drag's data Window target = findXdndAwareParent(req->requestor); if (target) { if (qt_xdnd_current_target && qt_xdnd_current_target == target) at = -2; else at = findXdndDropTransactionByWindow(target); } } } if (at >= 0) { restartXdndDropExpiryTimer(); // use the drag object from an XdndDrop tansaction manager->object = X11->dndDropTransactions.at(at).object; } else if (at != -2) { // no transaction found, we'll have to reject the request manager->object = 0; } if (manager->object) { Atom atomFormat = req->target; int dataFormat = 0; QByteArray data; if (X11->xdndMimeDataForAtom(req->target, manager->dragPrivate()->data, &data, &atomFormat, &dataFormat)) { int dataSize = data.size() / (dataFormat / 8); XChangeProperty (X11->display, req->requestor, req->property, atomFormat, dataFormat, PropModeReplace, (unsigned char *)data.data(), dataSize); evt.xselection.property = req->property; evt.xselection.target = atomFormat; } } // reset manager->object in case we modified it above manager->object = currentObject; // ### this can die if req->requestor crashes at the wrong // ### moment XSendEvent(X11->display, req->requestor, False, 0, &evt); } static QVariant xdndObtainData(const char *format, QVariant::Type requestedType) { QByteArray result; QWidget* w; QDragManager *manager = QDragManager::self(); if (qt_xdnd_dragsource_xid && manager->object && (w=QWidget::find(qt_xdnd_dragsource_xid)) && (!(w->windowType() == Qt::Desktop) || w->acceptDrops())) { QDragPrivate * o = QDragManager::self()->dragPrivate(); if (o->data->hasFormat(QLatin1String(format))) result = o->data->data(QLatin1String(format)); return result; } QList<Atom> atoms; int i = 0; while ((qt_xdnd_types[i])) { atoms.append(qt_xdnd_types[i]); ++i; } QByteArray encoding; Atom a = X11->xdndMimeAtomForFormat(QLatin1String(format), requestedType, atoms, &encoding); if (!a) return result; if (XGetSelectionOwner(X11->display, ATOM(XdndSelection)) == XNone) return result; // should never happen? QWidget* tw = qt_xdnd_current_widget; if (!qt_xdnd_current_widget || (qt_xdnd_current_widget->windowType() == Qt::Desktop)) tw = new QWidget; XConvertSelection(X11->display, ATOM(XdndSelection), a, ATOM(XdndSelection), tw->effectiveWinId(), qt_xdnd_target_current_time); XFlush(X11->display); XEvent xevent; bool got=X11->clipboardWaitForEvent(tw->effectiveWinId(), SelectionNotify, &xevent, 5000); if (got) { Atom type; if (X11->clipboardReadProperty(tw->effectiveWinId(), ATOM(XdndSelection), true, &result, 0, &type, 0)) { if (type == ATOM(INCR)) { int nbytes = result.size() >= 4 ? *((int*)result.data()) : 0; result = X11->clipboardReadIncrementalProperty(tw->effectiveWinId(), ATOM(XdndSelection), nbytes, false); } else if (type != a && type != XNone) { DEBUG("Qt clipboard: unknown atom %ld", type); } } } if (!qt_xdnd_current_widget || (qt_xdnd_current_widget->windowType() == Qt::Desktop)) delete tw; return X11->xdndMimeConvertToFormat(a, result, QLatin1String(format), requestedType, encoding); } /* Enable drag and drop for widget w by installing the proper properties on w's toplevel widget. */ bool QX11Data::dndEnable(QWidget* w, bool on) { w = w->window(); if (bool(((QExtraWidget*)w)->topData()->dnd) == on) return true; // been there, done that ((QExtraWidget*)w)->topData()->dnd = on ? 1 : 0; motifdndEnable(w, on); return xdndEnable(w, on); } Qt::DropAction QDragManager::drag(QDrag * o) { if (object == o || !o || !o->d_func()->source) return Qt::IgnoreAction; if (object) { cancel(); qApp->removeEventFilter(this); beingCancelled = false; } if (object) { // the last drag and drop operation hasn't finished, so we are going to wait // for one second to see if it does... if the finish message comes after this, // then we could still have problems, but this is highly unlikely QApplication::flush(); QElapsedTimer timer; timer.start(); do { XEvent event; if (XCheckTypedEvent(X11->display, ClientMessage, &event)) qApp->x11ProcessEvent(&event); // sleep 50 ms, so we don't use up CPU cycles all the time. struct timeval usleep_tv; usleep_tv.tv_sec = 0; usleep_tv.tv_usec = 50000; select(0, 0, 0, 0, &usleep_tv); } while (object && timer.hasExpired(1000)); } object = o; object->d_func()->target = 0; xdnd_data.deco = new QShapedPixmapWidget(object->source()->window()); willDrop = false; updatePixmap(); qApp->installEventFilter(this); XSetSelectionOwner(X11->display, ATOM(XdndSelection), dragPrivate()->source->window()->internalWinId(), X11->time); global_accepted_action = Qt::CopyAction; qt_xdnd_source_sameanswer = QRect(); #ifndef QT_NO_CURSOR // set the override cursor (must be done here, since it is updated // in the call to move() below) qApp->setOverrideCursor(Qt::ArrowCursor); restoreCursor = true; #endif move(QCursor::pos()); heartbeat = startTimer(200); qt_xdnd_dragging = true; if (!QWidget::mouseGrabber()) xdnd_data.deco->grabMouse(); eventLoop = new QEventLoop; (void) eventLoop->exec(); delete eventLoop; eventLoop = 0; #ifndef QT_NO_CURSOR if (restoreCursor) { qApp->restoreOverrideCursor(); restoreCursor = false; } #endif // delete cursors as they may be different next drag. delete noDropCursor; noDropCursor = 0; delete copyCursor; copyCursor = 0; delete moveCursor; moveCursor = 0; delete linkCursor; linkCursor = 0; delete xdnd_data.deco; xdnd_data.deco = 0; if (heartbeat != -1) killTimer(heartbeat); heartbeat = -1; qt_xdnd_current_screen = -1; qt_xdnd_dragging = false; return global_accepted_action; // object persists until we get an xdnd_finish message } void QDragManager::updatePixmap() { if (xdnd_data.deco) { QPixmap pm; QPoint pm_hot(default_pm_hotx,default_pm_hoty); if (object) { pm = dragPrivate()->pixmap; if (!pm.isNull()) pm_hot = dragPrivate()->hotspot; } if (pm.isNull()) { if (!defaultPm) defaultPm = new QPixmap(default_pm); pm = *defaultPm; } xdnd_data.deco->pm_hot = pm_hot; xdnd_data.deco->setPixmap(pm); xdnd_data.deco->move(QCursor::pos()-pm_hot); xdnd_data.deco->show(); } } QVariant QDropData::retrieveData_sys(const QString &mimetype, QVariant::Type requestedType) const { QByteArray mime = mimetype.toLatin1(); QVariant data = X11->motifdnd_active ? X11->motifdndObtainData(mime) : xdndObtainData(mime, requestedType); return data; } bool QDropData::hasFormat_sys(const QString &format) const { return formats().contains(format); } QStringList QDropData::formats_sys() const { QStringList formats; if (X11->motifdnd_active) { int i = 0; QByteArray fmt; while (!(fmt = X11->motifdndFormat(i)).isEmpty()) { formats.append(QLatin1String(fmt)); ++i; } } else { int i = 0; while ((qt_xdnd_types[i])) { QStringList formatsForAtom = X11->xdndMimeFormatsForAtom(qt_xdnd_types[i]); for (int j = 0; j < formatsForAtom.size(); ++j) { if (!formats.contains(formatsForAtom.at(j))) formats.append(formatsForAtom.at(j)); } ++i; } } return formats; } QT_END_NAMESPACE #endif // QT_NO_DRAGANDDROP