--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/src/gui/kernel/qdnd_x11.cpp Mon Jan 11 14:00:40 2010 +0000
@@ -0,0 +1,2055 @@
+/****************************************************************************
+**
+** Copyright (C) 2009 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.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** No Commercial Usage
+** This file contains pre-release code and may not be distributed.
+** You may use this file in accordance with the terms and conditions
+** contained in the Technology Preview License Agreement accompanying
+** this package.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, 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.
+**
+** If you have questions regarding the use of this file, please contact
+** Nokia at qt-info@nokia.com.
+**
+**
+**
+**
+**
+**
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#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 "qdatetime.h"
+#include "qiodevice.h"
+#include "qpointer.h"
+#include "qcursor.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 "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<QWidget> 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<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;
+ ret = true;
+ }
+ } else {
+ DEBUG("QClipboard: xdndMimeDataForAtom(): converting to type '%s' is not supported", qPrintable(atomName));
+ }
+ }
+ return ret && data != 0;
+}
+
+//$$$
+QList<Atom> QX11Data::xdndMimeAtomsForFormat(const QString &format)
+{
+ QList<Atom> atoms;
+ atoms.append(xdndMimeStringToAtom(format));
+
+ // special cases for strings
+ if (format == QLatin1String("text/plain")) {
+ atoms.append(ATOM(UTF8_STRING));
+ atoms.append(XA_STRING);
+ atoms.append(ATOM(TEXT));
+ atoms.append(ATOM(COMPOUND_TEXT));
+ }
+
+ // special cases for uris
+ if (format == QLatin1String("text/uri-list")) {
+ atoms.append(xdndMimeStringToAtom(QLatin1String("text/x-moz-url")));
+ }
+
+ //special cases for images
+ if (format == QLatin1String("image/ppm"))
+ atoms.append(XA_PIXMAP);
+ if (format == QLatin1String("image/pbm"))
+ atoms.append(XA_BITMAP);
+
+ return atoms;
+}
+
+//$$$
+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());
+ 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;
+
+ 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::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(dragCursor(Qt::MoveAction), 0,0);
+ copyCursor = new QCursor(dragCursor(Qt::CopyAction), 0,0);
+ linkCursor = new QCursor(dragCursor(Qt::LinkAction), 0,0);
+#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, false)) {
+ 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();
+
+ QTime started = QTime::currentTime();
+ QTime now = started;
+ do {
+ XEvent event;
+ if (XCheckTypedEvent(X11->display, ClientMessage, &event))
+ qApp->x11ProcessEvent(&event);
+
+ now = QTime::currentTime();
+ if (started > now) // crossed midnight
+ started = now;
+
+ // 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 && started.msecsTo(now) < 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