Add Qt3 development HEAD version

1 files changed, 978 insertions, 0 deletions

diff --git a/src/kernel/qmotifdnd_x11.cpp b/src/kernel/qmotifdnd_x11.cpp
new file mode 100644
index 0000000..c9399f9
--- /dev/null
+++ b/src/kernel/qmotifdnd_x11.cpp
@@ -0,0 +1,978 @@
+/****************************************************************************
+**
+** Implementation of Motif Dynamic Drag and Drop class
+**
+** Created : 950419
+**
+** Copyright (C) 2000-2008 Trolltech ASA.  All rights reserved.
+**
+** This file is part of the kernel module of the Qt GUI Toolkit.
+**
+** This file may be used under the terms of the GNU General
+** Public License versions 2.0 or 3.0 as published by the Free
+** Software Foundation and appearing in the files LICENSE.GPL2
+** and LICENSE.GPL3 included in the packaging of this file.
+** Alternatively you may (at your option) use any later version
+** of the GNU General Public License if such license has been
+** publicly approved by Trolltech ASA (or its successors, if any)
+** and the KDE Free Qt Foundation.
+**
+** Please review the following information to ensure GNU General
+** Public Licensing requirements will be met:
+** http://trolltech.com/products/qt/licenses/licensing/opensource/.
+** If you are unsure which license is appropriate for your use, please
+** review the following information:
+** http://trolltech.com/products/qt/licenses/licensing/licensingoverview
+** or contact the sales department at sales@trolltech.com.
+**
+** This file may be used under the terms of the Q Public License as
+** defined by Trolltech ASA and appearing in the file LICENSE.QPL
+** included in the packaging of this file.  Licensees holding valid Qt
+** Commercial licenses may use this file in accordance with the Qt
+** Commercial License Agreement provided with the Software.
+**
+** This file is provided "AS IS" with NO WARRANTY OF ANY KIND,
+** INCLUDING THE WARRANTIES OF DESIGN, MERCHANTABILITY AND FITNESS FOR
+** A PARTICULAR PURPOSE. Trolltech reserves all rights not granted
+** herein.
+**
+**********************************************************************/
+
+/* The following copyright notice pertains to the code as contributed
+to Trolltech, not to Trolltech's modifications. It is replicated
+in doc/dnd.doc, where the documentation system can see it. */
+
+/* Copyright 1996 Daniel Dardailler.
+
+   Permission to use, copy, modify, distribute, and sell this software
+   for any purpose is hereby granted without fee, provided that the above
+   copyright notice appear in all copies and that both that copyright
+   notice and this permission notice appear in supporting documentation,
+   and that the name of Daniel Dardailler not be used in advertising or
+   publicity pertaining to distribution of the software without specific,
+   written prior permission.  Daniel Dardailler makes no representations
+   about the suitability of this software for any purpose.  It is
+   provided "as is" without express or implied warranty.
+
+   Modifications Copyright 1999 Matt Koss, under the same license as
+   above.
+************************************************************/
+
+/***********************************************************/
+/* Motif Drag&Drop Dynamic Protocol messaging API code */
+/* Only requires Xlib layer - not MT safe */
+/* Author: Daniel Dardailler, daniel@x.org */
+/* Adapted by : Matt Koss, koss@napri.sk */
+/* Further adaptions by : Trolltech ASA */
+/***********************************************************/
+
+#include "qplatformdefs.h"
+
+#include "qapplication.h"
+
+#ifndef QT_NO_DRAGANDDROP
+
+#include "qwidget.h"
+#include "qt_x11_p.h"
+
+#include <stdlib.h>
+
+
+static Atom atom_message_type, atom_receiver_info, atom_src_property_type;
+static Atom atom_motif_window, atom_target_list ;
+
+static bool in_drop_site = FALSE;
+static Window cur_window = 0;
+static QWidget *drop_widget = 0L;
+
+static Atom Dnd_transfer_success, Dnd_transfer_failure;
+
+static Atom Dnd_selection;
+static Time Dnd_selection_time;
+
+static Atom * src_targets ;
+static ushort num_src_targets ;
+
+extern bool qt_motifdnd_active;
+
+// this stuff is copied from qclipboard_x11.cpp
+
+extern bool qt_xclb_wait_for_event( Display *dpy, Window win, int type,
+				    XEvent *event, int timeout );
+extern bool qt_xclb_read_property( Display *dpy, Window win, Atom property,
+				   bool deleteProperty,
+				   QByteArray *buffer, int *size, Atom *type,
+				   int *format, bool nullterm );
+
+extern Atom* qt_xdnd_str_to_atom( const char *mimeType );
+extern const char* qt_xdnd_atom_to_str( Atom );
+
+
+// Motif definitions
+#define DndVersion 1
+#define DndRevision 0
+#define DndIncludeVersion (DndVersion * 10 + DndRevision)
+
+/* The following values are used in the DndData structure */
+
+/* protocol style */
+#define DND_DRAG_NONE            0
+#define DND_DRAG_DROP_ONLY       1
+#define DND_DRAG_DYNAMIC         5
+
+/* message type */
+#define DND_TOP_LEVEL_ENTER   0
+#define DND_TOP_LEVEL_LEAVE   1
+#define DND_DRAG_MOTION       2
+#define DND_DROP_SITE_ENTER   3
+#define DND_DROP_SITE_LEAVE   4
+#define DND_DROP_START        5
+#define DND_OPERATION_CHANGED 8
+
+/* operation(s) */
+#define DND_NOOP	0L
+#define DND_MOVE 	(1L << 0)
+#define DND_COPY	(1L << 1)
+#define DND_LINK	(1L << 2)
+
+/* status */
+#define DND_NO_DROP_SITE        1
+#define DND_INVALID_DROP_SITE   2
+#define DND_VALID_DROP_SITE	3
+
+/* completion */
+#define DND_DROP        0
+#define DND_DROP_HELP   1
+#define DND_DROP_CANCEL 2
+
+#define BYTE unsigned char
+#define CARD32 unsigned int
+#define CARD16 unsigned short
+#define INT16  signed short
+
+/* Client side structure used in the API */
+typedef struct {
+    unsigned char       reason;  /* message type: DND_TOP_LEVEL_ENTER, etc */
+    Time                time ;
+    unsigned char       operation;
+    unsigned char       operations;
+    unsigned char       status;
+    unsigned char       completion;
+    short               x ;
+    short               y ;
+    Window              src_window ;
+    Atom                property ;
+} DndData ;
+
+
+typedef struct _DndSrcProp {
+    BYTE                byte_order ;
+    BYTE                protocol_version ;
+    CARD16              target_index ;
+    CARD32              selection ;
+} DndSrcProp ;
+
+typedef struct _DndReceiverProp {
+    BYTE                byte_order ;
+    BYTE                protocol_version ;
+    BYTE                protocol_style ;
+    BYTE                pad1;
+    CARD32              proxy_window;
+    CARD16              num_drop_sites ;
+    CARD16              pad2;
+    CARD32              total_size;
+} DndReceiverProp ;
+
+/* need to use some union hack since window and property are in
+   different order depending on the message ... */
+typedef struct _DndTop {
+    CARD32		src_window;
+    CARD32		property;
+} DndTop ;
+
+typedef struct _DndPot {
+    INT16		x;
+    INT16		y;
+    CARD32		property;
+    CARD32		src_window;
+} DndPot ;
+
+typedef struct _DndMessage {
+    BYTE		reason;
+    BYTE		byte_order;
+    CARD16		flags;
+    CARD32		time;
+    union {
+	DndTop top ;
+	DndPot pot ;
+    } data ;
+} DndMessage ;
+
+typedef struct {
+    BYTE	byte_order;
+    BYTE	protocol_version;
+    CARD16	num_target_lists;
+    CARD32	data_size;
+    /* then come series of CARD16,CARD32,CARD32,CARD32... */
+} DndTargets;
+
+
+/* protocol version */
+#define DND_PROTOCOL_VERSION 0
+
+
+#define DND_EVENT_TYPE_MASK  ((BYTE)0x80)
+#define DND_EVENT_TYPE_SHIFT 7
+#define DND_CLEAR_EVENT_TYPE  ((BYTE)0x7F)
+
+/* message_type is data[0] of the client_message
+   this return 1 (receiver bit up) or 0 (initiator) */
+#define DND_GET_EVENT_TYPE(message_type) \
+((char) (((message_type) & DND_EVENT_TYPE_MASK) >> DND_EVENT_TYPE_SHIFT))
+
+/* event_type can be 0 (initiator) or 1 (receiver) */
+#define DND_SET_EVENT_TYPE(event_type) \
+(((BYTE)(event_type) << DND_EVENT_TYPE_SHIFT) & DND_EVENT_TYPE_MASK)
+
+
+#define DND_OPERATION_MASK ((CARD16) 0x000F)
+#define DND_OPERATION_SHIFT 0
+#define DND_STATUS_MASK ((CARD16) 0x00F0)
+#define DND_STATUS_SHIFT 4
+#define DND_OPERATIONS_MASK ((CARD16) 0x0F00)
+#define DND_OPERATIONS_SHIFT 8
+#define DND_COMPLETION_MASK ((CARD16) 0xF000)
+#define DND_COMPLETION_SHIFT 12
+
+#define DND_GET_OPERATION(flags) \
+((unsigned char) \
+(((flags) & DND_OPERATION_MASK) >> DND_OPERATION_SHIFT))
+
+#define DND_SET_OPERATION(operation) \
+(((CARD16)(operation) << DND_OPERATION_SHIFT)\
+& DND_OPERATION_MASK)
+
+#define DND_GET_STATUS(flags) \
+((unsigned char) \
+(((flags) & DND_STATUS_MASK) >> DND_STATUS_SHIFT))
+
+#define DND_SET_STATUS(status) \
+(((CARD16)(status) << DND_STATUS_SHIFT)\
+& DND_STATUS_MASK)
+
+#define DND_GET_OPERATIONS(flags) \
+((unsigned char) \
+(((flags) & DND_OPERATIONS_MASK) >> DND_OPERATIONS_SHIFT))
+
+#define DND_SET_OPERATIONS(operation) \
+(((CARD16)(operation) << DND_OPERATIONS_SHIFT)\
+& DND_OPERATIONS_MASK)
+
+#define DND_GET_COMPLETION(flags) \
+((unsigned char) \
+(((flags) & DND_COMPLETION_MASK) >> DND_COMPLETION_SHIFT))
+
+#define DND_SET_COMPLETION(completion) \
+(((CARD16)(completion) << DND_COMPLETION_SHIFT)\
+& DND_COMPLETION_MASK)
+
+
+#define SWAP4BYTES(l) {\
+struct { unsigned t :32;} bit32;\
+char n,	*tp = (char *) &bit32;\
+bit32.t = l;\
+n = tp[0]; tp[0] = tp[3]; tp[3] = n;\
+n = tp[1]; tp[1] = tp[2]; tp[2] = n;\
+l = bit32.t;\
+}
+
+#define SWAP2BYTES(s) {\
+struct { unsigned t :16; } bit16;\
+char n, *tp = (char *) &bit16;\
+bit16.t = s;\
+n = tp[0]; tp[0] = tp[1]; tp[1] = n;\
+s = bit16.t;\
+}
+
+
+/** Private extern functions */
+
+static unsigned char DndByteOrder ();
+
+
+/***** Targets/Index stuff */
+
+typedef struct {
+    int	    num_targets;
+    Atom    *targets;
+} DndTargetsTableEntryRec, * DndTargetsTableEntry;
+
+typedef struct {
+    int	num_entries;
+    DndTargetsTableEntry entries;
+} DndTargetsTableRec, * DndTargetsTable;
+
+
+static int _DndIndexToTargets(Display * display,
+			      int index,
+			      Atom ** targets);
+
+extern void qt_x11_intern_atom( const char *, Atom * );
+
+/////////////////////////////////////////////////////////////////
+
+void qt_x11_motifdnd_init()
+{
+    /* Init atoms used in the com */
+
+    qt_x11_intern_atom( "_MOTIF_DRAG_AND_DROP_MESSAGE", &atom_message_type );
+    qt_x11_intern_atom( "_MOTIF_DRAG_INITIATOR_INFO", &atom_src_property_type );
+    qt_x11_intern_atom( "_MOTIF_DRAG_RECEIVER_INFO", &atom_receiver_info );
+    qt_x11_intern_atom( "_MOTIF_DRAG_WINDOW", &atom_motif_window );
+    qt_x11_intern_atom( "_MOTIF_DRAG_TARGETS", &atom_target_list );
+
+    qt_x11_intern_atom( "XmTRANSFER_SUCCESS", &Dnd_transfer_success );
+    qt_x11_intern_atom( "XmTRANSFER_FAILURE", &Dnd_transfer_failure );
+
+    char my_dnd_selection_name[30];  // 11-digit number should be enough
+    sprintf(my_dnd_selection_name, "_MY_DND_SELECTION_%d", (int)getpid());
+    qt_x11_intern_atom( my_dnd_selection_name, &Dnd_selection );
+}
+
+static unsigned char DndByteOrder ()
+{
+    static unsigned char byte_order = 0;
+
+    if (!byte_order) {
+	unsigned int endian = 1;
+	byte_order = (*((char *)&endian))?'l':'B';
+    }
+    return byte_order ;
+}
+
+
+
+static void DndReadSourceProperty(Display * dpy,
+				  Window window, Atom dnd_selection,
+				  Atom ** targets, unsigned short * num_targets)
+{
+    DndSrcProp * src_prop = 0;
+    Atom type ;
+    int format ;
+    unsigned long bytesafter, lengthRtn;
+
+    if ((XGetWindowProperty (dpy, window, dnd_selection, 0L, 100000L,
+			     False, atom_src_property_type, &type,
+			     &format, &lengthRtn, &bytesafter,
+			     (unsigned char **) &src_prop) != Success)
+	|| (type == None)) {
+	*num_targets = 0;
+	return ;
+    }
+
+    if (src_prop->byte_order != DndByteOrder()) {
+	SWAP2BYTES(src_prop->target_index);
+	SWAP4BYTES(src_prop->selection);
+    }
+
+    *num_targets = _DndIndexToTargets(dpy, src_prop->target_index, targets);
+
+    XFree((char*)src_prop);
+}
+
+
+/* Position the _MOTIF_DRAG_RECEIVER_INFO property on the dropsite window.
+   Called by the receiver of the drop to indicate the
+   supported protocol style : dynamic, drop_only or none */
+static void DndWriteReceiverProperty(Display * dpy, Window window,
+				     unsigned char protocol_style)
+{
+    DndReceiverProp receiver_prop ;
+
+    receiver_prop.byte_order = DndByteOrder() ;
+    receiver_prop.protocol_version = DND_PROTOCOL_VERSION;
+    receiver_prop.protocol_style = protocol_style ;
+    receiver_prop.proxy_window =  None ;
+    receiver_prop.num_drop_sites = 0 ;
+    receiver_prop.total_size = sizeof(DndReceiverProp);
+
+    /* write the buffer to the property */
+    XChangeProperty (dpy, window, atom_receiver_info, atom_receiver_info,
+		     8, PropModeReplace,
+		     (unsigned char *)&receiver_prop,
+		     sizeof(DndReceiverProp));
+}
+
+
+/* protocol style equiv (preregister stuff really) */
+#define DND_DRAG_DROP_ONLY_EQUIV 3
+#define DND_DRAG_DYNAMIC_EQUIV1  2
+#define DND_DRAG_DYNAMIC_EQUIV2  4
+
+
+/* Produce a client message to be sent by the caller */
+static void DndFillClientMessage(Display * dpy, Window window,
+				 XClientMessageEvent *cm,
+				 DndData * dnd_data,
+				 char receiver)
+{
+    DndMessage * dnd_message = (DndMessage*)&cm->data.b[0] ;
+
+    cm->display = dpy;
+    cm->type = ClientMessage;
+    cm->serial = LastKnownRequestProcessed(dpy);
+    cm->send_event = True;
+    cm->window = window;
+    cm->format = 8;
+    cm->message_type = atom_message_type ;/* _MOTIF_DRAG_AND_DROP_MESSAGE */
+
+    dnd_message->reason = dnd_data->reason | DND_SET_EVENT_TYPE(receiver);
+
+    dnd_message->byte_order = DndByteOrder();
+
+    /* we're filling in flags with more stuff that necessary,
+       depending on the reason, but it doesn't matter */
+    dnd_message->flags = 0 ;
+    dnd_message->flags |= DND_SET_STATUS(dnd_data->status) ;
+    dnd_message->flags |= DND_SET_OPERATION(dnd_data->operation) ;
+    dnd_message->flags |= DND_SET_OPERATIONS(dnd_data->operations) ;
+    dnd_message->flags |= DND_SET_COMPLETION(dnd_data->completion) ;
+
+    dnd_message->time = dnd_data->time ;
+
+    switch(dnd_data->reason) {
+    case DND_DROP_SITE_LEAVE: break ;
+    case DND_TOP_LEVEL_ENTER:
+    case DND_TOP_LEVEL_LEAVE:
+	dnd_message->data.top.src_window = dnd_data->src_window ;
+	dnd_message->data.top.property = dnd_data->property ;
+	break ; /* cannot fall thru since the byte layout is different in
+		   both set of messages, see top and pot union stuff */
+
+    case DND_DRAG_MOTION:
+    case DND_OPERATION_CHANGED:
+    case DND_DROP_SITE_ENTER:
+    case DND_DROP_START:
+	dnd_message->data.pot.x = dnd_data->x ; /* mouse position */
+	dnd_message->data.pot.y = dnd_data->y ;
+	dnd_message->data.pot.src_window = dnd_data->src_window ;
+	dnd_message->data.pot.property = dnd_data->property ;
+	break ;
+    default:
+	break ;
+    }
+
+}
+
+static Bool DndParseClientMessage(XClientMessageEvent *cm, DndData * dnd_data,
+				  char * receiver)
+{
+    DndMessage * dnd_message = (DndMessage*)&cm->data.b[0] ;
+
+    if (cm->message_type != atom_message_type) {
+	return False ;
+    }
+
+    if (dnd_message->byte_order != DndByteOrder()) {
+	SWAP2BYTES(dnd_message->flags);
+	SWAP4BYTES(dnd_message->time);
+    } /* do the rest in the switch */
+
+    dnd_data->reason = dnd_message->reason  ;
+    if (DND_GET_EVENT_TYPE(dnd_data->reason))
+	*receiver = 1 ;
+    else
+	*receiver = 0 ;
+    dnd_data->reason &= DND_CLEAR_EVENT_TYPE ;
+
+    dnd_data->time = dnd_message->time ;
+
+    /* we're reading in more stuff that necessary. but who cares */
+    dnd_data->status = DND_GET_STATUS(dnd_message->flags) ;
+    dnd_data->operation = DND_GET_OPERATION(dnd_message->flags) ;
+    dnd_data->operations = DND_GET_OPERATIONS(dnd_message->flags) ;
+    dnd_data->completion = DND_GET_COMPLETION(dnd_message->flags) ;
+
+    switch(dnd_data->reason) {
+    case DND_TOP_LEVEL_ENTER:
+    case DND_TOP_LEVEL_LEAVE:
+	if (dnd_message->byte_order != DndByteOrder()) {
+	    SWAP4BYTES(dnd_message->data.top.src_window);
+	    SWAP4BYTES(dnd_message->data.top.property);
+	}
+	dnd_data->src_window = dnd_message->data.top.src_window ;
+	dnd_data->property = dnd_message->data.top.property ;
+	break ; /* cannot fall thru, see above comment in write msg */
+
+    case DND_DRAG_MOTION:
+    case DND_OPERATION_CHANGED:
+    case DND_DROP_SITE_ENTER:
+    case DND_DROP_START:
+	if (dnd_message->byte_order != DndByteOrder()) {
+	    SWAP2BYTES(dnd_message->data.pot.x);
+	    SWAP2BYTES(dnd_message->data.pot.y);
+	    SWAP4BYTES(dnd_message->data.pot.property);
+	    SWAP4BYTES(dnd_message->data.pot.src_window);
+	}
+	dnd_data->x = dnd_message->data.pot.x ;
+	dnd_data->y = dnd_message->data.pot.y ;
+	dnd_data->property = dnd_message->data.pot.property ;
+	dnd_data->src_window = dnd_message->data.pot.src_window ;
+	break ;
+
+    case DND_DROP_SITE_LEAVE:
+	break;
+    default:
+	break ;
+    }
+
+    return True ;
+}
+
+
+static Window MotifWindow(Display *display )
+{
+    Atom            type;
+    int             format;
+    unsigned long   size;
+    unsigned long   bytes_after;
+    Window         *property = 0;
+    Window	    motif_window ;
+
+    /* this version does no caching, so it's slow: round trip each time */
+
+    if ((XGetWindowProperty (display, DefaultRootWindow(display),
+			     atom_motif_window,
+			     0L, 100000L, False, AnyPropertyType,
+			     &type, &format, &size, &bytes_after,
+			     (unsigned char **) &property) == Success) &&
+	(type != None)) {
+	motif_window = *property;
+    } else {
+	XSetWindowAttributes sAttributes;
+
+	/* really, this should be done on a separate connection,
+	   with XSetCloseDownMode (RetainPermanent), so that
+	   others don't have to recreate it; hopefully, some real
+	   Motif application will be around to do it */
+
+	sAttributes.override_redirect = True;
+	sAttributes.event_mask = PropertyChangeMask;
+	motif_window = XCreateWindow (display,
+				      DefaultRootWindow (display),
+				      -170, -560, 1, 1, 0, 0,
+				      InputOnly, CopyFromParent,
+				      (CWOverrideRedirect |CWEventMask),
+				      &sAttributes);
+	XMapWindow (display, motif_window);
+    }
+
+    if (property) {
+	XFree ((char *)property);
+    }
+
+    return (motif_window);
+}
+
+
+static DndTargetsTable TargetsTable(Display *display)
+{
+    Atom            type;
+    int             format;
+    unsigned long   size;
+    unsigned long   bytes_after;
+    Window motif_window = MotifWindow(display) ;
+    DndTargets * target_prop;
+    DndTargetsTable targets_table ;
+    int i,j ;
+    char * target_data ;
+
+    /* this version does no caching, so it's slow: round trip each time */
+    /* ideally, register for property notify on this target_list
+       atom and update when necessary only */
+
+    if ((XGetWindowProperty (display, motif_window,
+			     atom_target_list, 0L, 100000L,
+			     False, atom_target_list,
+			     &type, &format,	&size, &bytes_after,
+			     (unsigned char **) &target_prop) != Success) ||
+	type == None) {
+	qWarning("QMotifDND: cannot get property on motif window");
+	return 0;
+    }
+
+    if (target_prop->protocol_version != DND_PROTOCOL_VERSION) {
+	qWarning("QMotifDND: protocol mismatch");
+    }
+
+    if (target_prop->byte_order != DndByteOrder()) {
+	/* need to swap num_target_lists and size */
+	SWAP2BYTES(target_prop->num_target_lists);
+	SWAP4BYTES(target_prop->data_size);
+    }
+
+    /* now parse DndTarget prop data in a TargetsTable */
+
+    targets_table = (DndTargetsTable)malloc(sizeof(DndTargetsTableRec));
+    targets_table->num_entries = target_prop->num_target_lists ;
+    targets_table->entries = (DndTargetsTableEntry)
+			     malloc(sizeof(DndTargetsTableEntryRec) * target_prop->num_target_lists);
+
+    target_data = (char*)target_prop + sizeof(*target_prop) ;
+
+    for (i = 0 ; i < targets_table->num_entries; i++) {
+	CARD16 num_targets ;
+	CARD32 atom ;
+
+	memcpy(&num_targets, target_data, 2);
+	target_data += 2;
+
+	/* potential swap needed here */
+	if (target_prop->byte_order != DndByteOrder())
+	    SWAP2BYTES(num_targets);
+
+	targets_table->entries[i].num_targets = num_targets ;
+	targets_table->entries[i].targets = (Atom *)
+					    malloc(sizeof(Atom) * targets_table->entries[i].num_targets);
+
+
+	for (j = 0; j < num_targets; j++) {
+	    memcpy(&atom, target_data, 4 );
+	    target_data += 4;
+
+	    /* another potential swap needed here */
+	    if (target_prop->byte_order != DndByteOrder())
+		SWAP4BYTES(atom);
+
+	    targets_table->entries[i].targets[j] = (Atom) atom ;
+	}
+    }
+
+    if (target_prop) {
+	XFree((char *)target_prop);
+    }
+
+    return targets_table ;
+}
+
+
+static int _DndIndexToTargets(Display * display,
+			      int index,
+			      Atom ** targets)
+{
+    DndTargetsTable	targets_table;
+    int i ;
+
+    /* again, slow: no caching here, alloc/free each time */
+
+    if (!(targets_table = TargetsTable (display)) ||
+	(index >= targets_table->num_entries)) {
+	return -1;
+    }
+
+    /* transfer the correct target list index */
+    *targets = (Atom*)malloc(sizeof(Atom)*targets_table->
+			     entries[index].num_targets);
+    memcpy((char*)*targets,
+	   (char*)targets_table->entries[index].targets,
+	   sizeof(Atom)*targets_table->entries[index].num_targets);
+
+    /* free the target table and its guts */
+    for (i=0 ; i < targets_table->num_entries; i++)
+	XFree((char*)targets_table->entries[i].targets);
+
+    int tmp = targets_table->entries[index].num_targets;
+    XFree((char*)targets_table);
+
+    return tmp; // targets_table->entries[index].num_targets;
+}
+
+
+const char *qt_motifdnd_format( int n )
+{
+    if ( ! qt_motifdnd_active )
+	return 0; // should not happen
+
+    if ( n == 0 )
+	return "text/plain";
+    if ( n == 1 )
+	return "text/uri-list";
+    n -= 2;
+
+    if ( n >= num_src_targets )
+	return 0;
+
+    Atom target = src_targets[n];
+
+    // duplicated from qclipboard_x11.cpp - not the best solution
+    static Atom xa_utf8_string = *qt_xdnd_str_to_atom( "UTF8_STRING" );
+    static Atom xa_text = *qt_xdnd_str_to_atom( "TEXT" );
+    static Atom xa_compound_text = *qt_xdnd_str_to_atom( "COMPOUND_TEXT" );
+
+    if ( target == XA_STRING )
+	return "text/plain;charset=ISO-8859-1";
+    if ( target == xa_utf8_string )
+	return "text/plain;charset=UTF-8";
+    if ( target == xa_text ||
+	 target == xa_compound_text )
+	return "text/plain";
+
+    return qt_xdnd_atom_to_str( target );
+}
+
+
+QByteArray qt_motifdnd_obtain_data( const char *mimeType )
+{
+    QByteArray result;
+
+    // try to convert the selection to the requested property
+    // qDebug( "trying to convert to '%s'", mimeType );
+
+    int n=0;
+    const char* f;
+    do {
+	f = qt_motifdnd_format( n );
+	if ( !f )
+	    return result;
+	n++;
+    } while( qstricmp( mimeType, f ) );
+
+    // found one
+    Atom conversion_type;
+
+    if ( qstrnicmp( f, "text/", 5 ) == 0 ) {
+	// always convert text to XA_STRING for compatibility with
+	// prior Qt versions
+	conversion_type = XA_STRING;
+    } else {
+	conversion_type = *qt_xdnd_str_to_atom( f );
+	// qDebug( "found format '%s' 0x%lx '%s'", f, conversion_type,
+	// qt_xdnd_atom_to_str( conversion_type ) );
+    }
+
+    if ( XGetSelectionOwner( qt_xdisplay(),
+			     Dnd_selection ) == None ) {
+	return result; // should never happen?
+    }
+
+    QWidget* tw = drop_widget;
+    if ( drop_widget->isDesktop() ) {
+	tw = new QWidget;
+    }
+
+    // convert selection to the appropriate type
+    XConvertSelection (qt_xdisplay(), Dnd_selection, conversion_type,
+		       Dnd_selection, tw->winId(), Dnd_selection_time);
+
+    XFlush( qt_xdisplay() );
+
+    XEvent xevent;
+    bool got=qt_xclb_wait_for_event( qt_xdisplay(),
+				     tw->winId(),
+				     SelectionNotify, &xevent, 5000);
+    if ( got ) {
+	Atom type;
+
+	if ( qt_xclb_read_property( qt_xdisplay(),
+				    tw->winId(),
+				    Dnd_selection, TRUE,
+				    &result, 0, &type, 0, TRUE ) ) {
+	}
+    }
+
+    //   we have to convert selection in order to indicate success to the initiator
+    XConvertSelection (qt_xdisplay(), Dnd_selection, Dnd_transfer_success,
+		       Dnd_selection, tw->winId(), Dnd_selection_time);
+
+    // wait again for SelectionNotify event
+    qt_xclb_wait_for_event( qt_xdisplay(),
+			    tw->winId(),
+			    SelectionNotify, &xevent, 5000);
+
+    if ( drop_widget->isDesktop() ) {
+	delete tw;
+    }
+
+    return result;
+}
+
+
+void qt_motifdnd_enable( QWidget *widget, bool )
+{
+    DndWriteReceiverProperty( widget->x11Display(), widget->winId(),
+			      DND_DRAG_DYNAMIC);
+}
+
+
+void qt_motifdnd_handle_msg( QWidget * /* w */ , const XEvent * xe, bool /* passive */ )
+{
+
+    XEvent event = *xe;
+    XClientMessageEvent cm ;
+    DndData dnd_data ;
+    char receiver ;
+
+    if (!(DndParseClientMessage ((XClientMessageEvent*)&event,
+				 &dnd_data, &receiver))) {
+	return;
+    }
+
+    switch ( dnd_data.reason ) {
+
+    case DND_DRAG_MOTION:
+
+	{
+	    /* check if in drop site, and depending on the state,
+	       send a drop site enter or drop site leave or echo */
+
+	    QPoint p( dnd_data.x, dnd_data.y );
+	    QWidget *c = QApplication::widgetAt( p, TRUE );
+	    if (c)
+		p = c->mapFromGlobal(p);
+
+	    while ( c && !c->acceptDrops() && !c->isTopLevel() ) {
+		p = c->mapToParent( p );
+		c = c->parentWidget();
+	    }
+
+	    QDragMoveEvent me( p );
+	    QDropEvent::Action accepted_action = QDropEvent::Copy;
+	    me.setAction(accepted_action);
+
+	    if ( c != 0L && c->acceptDrops() ) {
+
+		if ( drop_widget != 0L && drop_widget->acceptDrops() &&
+		     drop_widget != c ) {
+		    QDragLeaveEvent e;
+		    QApplication::sendEvent( drop_widget, &e );
+		    QDragEnterEvent de( p );
+		    QApplication::sendEvent( c, &de );
+		}
+
+		drop_widget = c;
+
+		if (!in_drop_site) {
+		    in_drop_site = True ;
+
+		    dnd_data.reason = DND_DROP_SITE_ENTER ;
+		    dnd_data.time = CurrentTime ;
+		    dnd_data.operation = DND_MOVE|DND_COPY;
+		    dnd_data.operations = DND_MOVE|DND_COPY;
+
+		    DndFillClientMessage (event.xclient.display,
+					  cur_window,
+					  &cm, &dnd_data, 0);
+
+		    XSendEvent(event.xbutton.display,
+			       cur_window, False, 0,
+			       (XEvent *)&cm) ;
+
+		    QDragEnterEvent de( p );
+		    QApplication::sendEvent( drop_widget, &de );
+		    if ( de.isAccepted() ) {
+			me.accept( de.answerRect() );
+		    } else {
+			me.ignore( de.answerRect() );
+		    }
+
+		} else {
+		    dnd_data.reason = DND_DRAG_MOTION ;
+		    dnd_data.time = CurrentTime ;
+		    dnd_data.operation = DND_MOVE|DND_COPY;
+		    dnd_data.operations = DND_MOVE|DND_COPY;
+
+		    DndFillClientMessage (event.xclient.display,
+					  cur_window,
+					  &cm, &dnd_data, 0);
+
+		    XSendEvent(event.xbutton.display,
+			       cur_window, False, 0,
+			       (XEvent *)&cm) ;
+
+		    QApplication::sendEvent( drop_widget, &me );
+		}
+	    } else {
+		if (in_drop_site) {
+		    in_drop_site = False ;
+
+		    dnd_data.reason = DND_DROP_SITE_LEAVE ;
+		    dnd_data.time = CurrentTime ;
+
+		    DndFillClientMessage (event.xclient.display,
+					  cur_window,
+					  &cm, &dnd_data, 0);
+
+		    XSendEvent(event.xbutton.display,
+			       cur_window, False, 0,
+			       (XEvent *)&cm) ;
+
+		    QDragLeaveEvent e;
+		    QApplication::sendEvent( drop_widget, &e );
+		}
+	    }
+	}
+	break;
+
+    case DND_TOP_LEVEL_ENTER:
+
+	/* get the size of our drop site for later use */
+
+	cur_window = dnd_data.src_window ;
+	qt_motifdnd_active = TRUE;
+
+	/* no answer needed, just read source property */
+	DndReadSourceProperty (event.xclient.display,
+			       cur_window,
+			       dnd_data.property,
+			       &src_targets, &num_src_targets);
+	break;
+
+    case DND_TOP_LEVEL_LEAVE:
+	/* no need to do anything */
+	break;
+
+    case DND_OPERATION_CHANGED:
+	/* need to echo */
+	break;
+
+    case DND_DROP_START:
+	if (!in_drop_site) {
+	    // we have to convert selection in order to indicate failure to the initiator
+	    XConvertSelection (qt_xdisplay(), dnd_data.property, Dnd_transfer_failure,
+			       dnd_data.property, cur_window, dnd_data.time);
+	    QDragLeaveEvent e;
+	    QApplication::sendEvent( drop_widget, &e );
+	    drop_widget = 0;
+	    return;
+	}
+
+	/* need to echo and then request a convert */
+	dnd_data.reason = DND_DROP_START ;
+
+	DndFillClientMessage (event.xclient.display,
+			      drop_widget->winId(),
+			      &cm, &dnd_data, 0);
+
+	XSendEvent(event.xbutton.display,
+		   cur_window, False, 0,
+		   (XEvent *)&cm) ;
+
+	// store selection and its time
+	Dnd_selection = dnd_data.property;
+	Dnd_selection_time = dnd_data.time;
+
+	QPoint p( dnd_data.x, dnd_data.y );
+	QDropEvent de( drop_widget->mapFromGlobal(p) );
+	de.setAction( QDropEvent::Copy );
+	QApplication::sendEvent( drop_widget, &de );
+
+	if (in_drop_site)
+	    in_drop_site = False ;
+
+	drop_widget = 0;
+	cur_window = 0;
+	break;
+    }   //  end of switch ( dnd_data.reason )
+}
+
+#endif // QT_NO_DRAGANDDROP