/****************************************************************************
**
** 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.
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** $QT_END_LICENSE$
**
****************************************************************************/
#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