1 // Permission is hereby granted, free of charge, to any person obtaining
2 // a copy of this software and associated documentation files (the
3 // "Software"), to deal in the Software without restriction, including
4 // without limitation the rights to use, copy, modify, merge, publish,
5 // distribute, sublicense, and/or sell copies of the Software, and to
6 // permit persons to whom the Software is furnished to do so, subject to
7 // the following conditions:
9 // The above copyright notice and this permission notice shall be
10 // included in all copies or substantial portions of the Software.
12 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
13 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
14 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
15 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
16 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
17 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
18 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
20 // Copyright (c) 2005 Novell, Inc.
23 // Jackson Harper (jackson@ximian.com)
32 using System.Collections;
33 using System.Runtime.Serialization;
34 using System.Runtime.InteropServices;
35 using System.Runtime.Serialization.Formatters.Binary;
37 namespace System.Windows.Forms {
39 internal class X11Dnd {
46 private enum DragState {
53 private interface IDataConverter {
54 void GetData (X11Dnd dnd, DataObject data, ref XEvent xevent);
55 void SetData (X11Dnd dnd, object data, ref XEvent xevent);
58 private delegate void MimeConverter (IntPtr dsp,
59 DataObject data, ref XEvent xevent);
61 private class MimeHandler {
64 public IntPtr NonProtocol;
65 public IDataConverter Converter;
67 public MimeHandler (string name, IDataConverter converter)
70 Converter = converter;
73 public override string ToString ()
75 return "MimeHandler {" + Name + "}";
79 private MimeHandler [] MimeHandlers = {
80 // new MimeHandler ("WCF_DIB"),
81 // new MimeHandler ("image/gif", new MimeConverter (ImageConverter)),
82 // new MimeHandler ("text/rtf", new MimeConverter (RtfConverter)),
83 // new MimeHandler ("text/richtext", new MimeConverter (RtfConverter)),
85 new MimeHandler ("text/plain", new TextConverter ()),
86 new MimeHandler ("text/html", new HtmlConverter ()),
87 new MimeHandler ("text/uri-list", new UriListConverter ()),
88 new MimeHandler ("application/x-mono-serialized-object",
89 new SerializedObjectConverter ())
92 private class SerializedObjectConverter : IDataConverter {
94 public void GetData (X11Dnd dnd, DataObject data, ref XEvent xevent)
96 MemoryStream stream = dnd.GetData (ref xevent);
97 BinaryFormatter bf = new BinaryFormatter ();
99 if (stream.Length == 0)
103 object obj = bf.Deserialize (stream);
107 public void SetData (X11Dnd dnd, object data, ref XEvent xevent)
112 MemoryStream stream = new MemoryStream ();
113 BinaryFormatter bf = new BinaryFormatter ();
115 bf.Serialize (stream, data);
117 IntPtr buffer = Marshal.AllocHGlobal ((int) stream.Length);
120 for (int i = 0; i < stream.Length; i++) {
121 Marshal.WriteByte (buffer, i, (byte) stream.ReadByte ());
124 dnd.SetProperty (ref xevent, buffer, (int) stream.Length);
128 private class HtmlConverter : IDataConverter {
130 public void GetData (X11Dnd dnd, DataObject data, ref XEvent xevent)
132 string text = dnd.GetText (ref xevent, false);
135 data.SetData (DataFormats.Text, text);
136 data.SetData (DataFormats.UnicodeText, text);
139 public void SetData (X11Dnd dnd, object data, ref XEvent xevent)
143 string str = data as string;
148 if (xevent.SelectionRequestEvent.target == (int) Atom.XA_STRING) {
149 byte [] bytes = Encoding.ASCII.GetBytes (str);
150 buffer = Marshal.AllocHGlobal (bytes.Length);
152 for (int i = 0; i < len; i++)
153 Marshal.WriteByte (buffer, i, bytes [i]);
155 buffer = Marshal.StringToHGlobalAnsi (str);
157 while (Marshal.ReadByte (buffer, len) != 0)
161 dnd.SetProperty (ref xevent, buffer, len);
163 Marshal.FreeHGlobal (buffer);
167 private class TextConverter : IDataConverter {
169 public void GetData (X11Dnd dnd, DataObject data, ref XEvent xevent)
171 string text = dnd.GetText (ref xevent, true);
174 data.SetData (DataFormats.Text, text);
175 data.SetData (DataFormats.UnicodeText, text);
178 public void SetData (X11Dnd dnd, object data, ref XEvent xevent)
182 string str = data as string;
187 if (xevent.SelectionRequestEvent.target == (int) Atom.XA_STRING) {
188 byte [] bytes = Encoding.ASCII.GetBytes (str);
189 buffer = Marshal.AllocHGlobal (bytes.Length);
191 for (int i = 0; i < len; i++)
192 Marshal.WriteByte (buffer, i, bytes [i]);
194 buffer = Marshal.StringToHGlobalAnsi (str);
196 while (Marshal.ReadByte (buffer, len) != 0)
200 dnd.SetProperty (ref xevent, buffer, len);
202 Marshal.FreeHGlobal (buffer);
206 private class UriListConverter : IDataConverter {
208 public void GetData (X11Dnd dnd, DataObject data, ref XEvent xevent)
210 string text = dnd.GetText (ref xevent, false);
214 // TODO: Do this in a loop instead of just splitting
215 ArrayList uri_list = new ArrayList ();
216 string [] lines = text.Split (new char [] { '\r', '\n' });
217 foreach (string line in lines) {
218 // # is a comment line (see RFC 2483)
219 if (line.StartsWith ("#"))
222 Uri uri = new Uri (line);
223 uri_list.Add (uri.LocalPath);
227 string [] l = (string []) uri_list.ToArray (typeof (string));
230 data.SetData (DataFormats.FileDrop, l);
231 data.SetData ("FileName", l [0]);
232 data.SetData ("FileNameW", l [0]);
235 public void SetData (X11Dnd dnd, object data, ref XEvent xevent)
237 string [] uri_list = data as string [];
239 if (uri_list == null)
242 StringBuilder res = new StringBuilder ();
243 foreach (string uri_str in uri_list) {
244 Uri uri = new Uri (uri_str);
245 res.Append (uri.ToString ());
249 IntPtr buffer = Marshal.StringToHGlobalAnsi ((string) data);
251 while (Marshal.ReadByte (buffer, len) != 0)
254 dnd.SetProperty (ref xevent, buffer, len);
258 private class DragData {
259 public IntPtr Window;
260 public DragState State;
262 public IntPtr Action;
263 public IntPtr [] SupportedTypes;
264 public MouseButtons MouseState;
266 public IntPtr LastWindow;
267 public IntPtr LastTopLevel;
269 public bool WillAccept;
273 State = DragState.None;
275 SupportedTypes = null;
280 private class DropData {
284 // This version seems to be the most common
285 private static readonly uint [] XdndVersion = new uint [] { 4 };
287 private IntPtr display;
288 private DragData drag_data;
290 private IntPtr XdndAware;
291 private IntPtr XdndSelection;
292 private IntPtr XdndEnter;
293 private IntPtr XdndLeave;
294 private IntPtr XdndPosition;
295 private IntPtr XdndDrop;
296 private IntPtr XdndFinished;
297 private IntPtr XdndStatus;
298 private IntPtr XdndTypeList;
299 private IntPtr XdndActionCopy;
300 private IntPtr XdndActionMove;
301 private IntPtr XdndActionLink;
302 private IntPtr XdndActionPrivate;
303 private IntPtr XdndActionList;
304 private IntPtr XdndActionDescription;
305 private IntPtr XdndActionAsk;
309 private int converts_pending;
310 private bool position_recieved;
311 private bool status_sent;
312 private IntPtr target;
313 private IntPtr source;
314 private IntPtr toplevel;
315 private DataObject data;
317 private IntPtr drag_action;
318 private Control control;
319 private int pos_x, pos_y;
320 private DragDropEffects allowed;
321 private DragEventArgs drag_event;
323 private Cursor CursorNo;
324 private Cursor CursorCopy;
325 private Cursor CursorMove;
326 private Cursor CursorLink;
327 private IntPtr CurrentCursorHandle;
329 public X11Dnd (IntPtr display)
331 this.display = display;
335 public void SetAllowDrop (Hwnd hwnd, bool allow)
337 if (hwnd.allow_drop == allow)
340 XChangeProperty (display, hwnd.whole_window, XdndAware,
341 (IntPtr) Atom.XA_ATOM, 32,
342 PropertyMode.Replace, XdndVersion, allow ? 1 : 0);
343 hwnd.allow_drop = allow;
346 public DragDropEffects StartDrag (IntPtr handle, object data,
347 DragDropEffects allowed_effects)
349 drag_data = new DragData ();
350 drag_data.Window = handle;
351 drag_data.State = DragState.Beginning;
352 drag_data.MouseState = XplatUIX11.MouseState;
353 drag_data.Data = data;
354 drag_data.SupportedTypes = DetermineSupportedTypes (data);
356 drag_data.Action = ActionFromEffect (allowed_effects);
358 if (CursorNo == null) {
359 // Make sure the cursors are created
360 CursorNo = new Cursor (typeof (X11Dnd), "DnDNo.cur");
361 CursorCopy = new Cursor (typeof (X11Dnd), "DnDCopy.cur");
362 CursorMove = new Cursor (typeof (X11Dnd), "DnDMove.cur");
363 CursorLink = new Cursor (typeof (X11Dnd), "DnDLink.cur");
366 drag_data.LastTopLevel = IntPtr.Zero;
367 return DragDropEffects.Copy;
370 public void HandleButtonRelease (ref XEvent xevent)
372 if (drag_data == null)
375 if (!((drag_data.MouseState == MouseButtons.Left &&
376 xevent.ButtonEvent.button == 1) ||
377 (drag_data.MouseState == MouseButtons.Right &&
378 xevent.ButtonEvent.button == 3)))
381 if (drag_data.State == DragState.Beginning) {
382 state = State.Accepting;
383 } else if (drag_data.State != DragState.None) {
385 if (drag_data.WillAccept) {
386 SendDrop (drag_data.LastTopLevel, xevent.AnyEvent.window,
387 xevent.ButtonEvent.time);
390 XplatUIX11.XUngrabPointer (display, 0);
391 drag_data.State = DragState.None;
392 // WE can't reset the drag data yet as it is still
393 // most likely going to be used by the SelectionRequest
398 public bool HandleMotionNotify (ref XEvent xevent)
400 if (drag_data == null)
403 if (drag_data.State == DragState.Beginning) {
406 drag_data.State = DragState.Dragging;
408 suc = XplatUIX11.XSetSelectionOwner (display, (int) XdndSelection,
410 xevent.ButtonEvent.time);
413 Console.Error.WriteLine ("Could not take ownership of XdndSelection aborting drag.");
418 suc = XGrabPointer (display, xevent.AnyEvent.window,
420 EventMask.ButtonMotionMask |
421 EventMask.PointerMotionMask |
422 EventMask.ButtonPressMask |
423 EventMask.ButtonReleaseMask,
424 GrabMode.GrabModeAsync,
425 GrabMode.GrabModeAsync,
426 IntPtr.Zero, IntPtr.Zero/*CursorCopy.Handle*/, 0);
429 Console.Error.WriteLine ("Could not grab pointer aborting drag.");
434 drag_data.State = DragState.Dragging;
435 } else if (drag_data.State != DragState.None) {
436 bool dnd_aware = false;
437 IntPtr toplevel = IntPtr.Zero;
438 IntPtr window = XplatUIX11.RootWindowHandle;
444 while (XQueryPointer (display,
447 out x_temp, out y_temp,
448 out xevent.MotionEvent.x,
449 out xevent.MotionEvent.y,
453 dnd_aware = IsWindowDndAware (window);
456 xevent.MotionEvent.x_root = x_temp;
457 xevent.MotionEvent.y_root = y_temp;
461 if (child == IntPtr.Zero)
467 if (window != drag_data.LastWindow && drag_data.State == DragState.Entered) {
468 drag_data.State = DragState.Dragging;
470 // TODO: Send a Leave if this is an MWF window
472 if (toplevel != drag_data.LastTopLevel)
473 SendLeave (drag_data.LastTopLevel, xevent.MotionEvent.window);
476 drag_data.State = DragState.Entered;
477 if (toplevel != drag_data.LastTopLevel) {
478 // Entering a new toplevel window
479 SendEnter (toplevel, drag_data.Window, drag_data.SupportedTypes);
481 // Already in a toplevel window, so send a position
482 SendPosition (toplevel, drag_data.Window,
484 xevent.MotionEvent.x_root,
485 xevent.MotionEvent.y_root,
486 xevent.MotionEvent.time);
489 drag_data.LastTopLevel = toplevel;
490 drag_data.LastWindow = window;
497 private string GetText (IntPtr handle) {
498 string text = String.Empty;
501 textptr = IntPtr.Zero;
503 XFetchName (display, handle, ref textptr);
504 if (textptr != IntPtr.Zero) {
505 text = Marshal.PtrToStringAnsi(textptr);
513 // return true if the event is handled here
514 public bool HandleClientMessage (ref XEvent xevent)
516 // most common so we check it first
517 if (xevent.ClientMessageEvent.message_type == XdndPosition)
518 return Accepting_HandlePositionEvent (ref xevent);
519 if (xevent.ClientMessageEvent.message_type == XdndEnter)
520 return Accepting_HandleEnterEvent (ref xevent);
521 if (xevent.ClientMessageEvent.message_type == XdndDrop)
522 return Accepting_HandleDropEvent (ref xevent);
523 if (xevent.ClientMessageEvent.message_type == XdndLeave)
524 return Accepting_HandleLeaveEvent (ref xevent);
525 if (xevent.ClientMessageEvent.message_type == XdndStatus)
526 return HandleStatusEvent (ref xevent);
531 public bool HandleSelectionNotifyEvent (ref XEvent xevent)
533 if (source != XGetSelectionOwner (display, XdndSelection))
536 MimeHandler handler = FindHandler ((IntPtr) xevent.SelectionEvent.target);
540 data = new DataObject ();
542 handler.Converter.GetData (this, data, ref xevent);
545 if (converts_pending <= 0 && position_recieved) {
546 drag_event = new DragEventArgs (data, 0, pos_x, pos_y,
547 allowed, DragDropEffects.None);
548 control.DndEnter (drag_event);
549 SendStatus (source, drag_event.Effect);
555 public bool HandleSelectionRequestEvent (ref XEvent xevent)
557 if (xevent.SelectionRequestEvent.selection != (int) XdndSelection)
560 MimeHandler handler = FindHandler ((IntPtr) xevent.SelectionRequestEvent.target);
564 handler.Converter.SetData (this, drag_data.Data, ref xevent);
569 private void SetProperty (ref XEvent xevent, IntPtr data, int length)
571 XEvent sel = new XEvent();
572 sel.SelectionEvent.type = XEventName.SelectionNotify;
573 sel.SelectionEvent.send_event = true;
574 sel.SelectionEvent.display = display;
575 sel.SelectionEvent.selection = xevent.SelectionRequestEvent.selection;
576 sel.SelectionEvent.target = xevent.SelectionRequestEvent.target;
577 sel.SelectionEvent.requestor = xevent.SelectionRequestEvent.requestor;
578 sel.SelectionEvent.time = xevent.SelectionRequestEvent.time;
579 sel.SelectionEvent.property = 0;
581 XplatUIX11.XChangeProperty (display, xevent.SelectionRequestEvent.requestor,
582 xevent.SelectionRequestEvent.property,
583 xevent.SelectionRequestEvent.target,
584 8, PropertyMode.Replace, data, length);
585 sel.SelectionEvent.property = xevent.SelectionRequestEvent.property;
587 XSendEvent (display, xevent.SelectionRequestEvent.requestor, false,
588 EventMask.NoEventMask, ref sel);
592 private void Reset ()
598 private void ResetSourceData ()
600 converts_pending = 0;
604 private void ResetTargetData ()
606 position_recieved = false;
610 private bool Accepting_HandleEnterEvent (ref XEvent xevent)
614 source = xevent.ClientMessageEvent.ptr1;
615 toplevel = xevent.AnyEvent.window;
616 target = IntPtr.Zero;
618 ConvertData (ref xevent);
623 private bool Accepting_HandlePositionEvent (ref XEvent xevent)
625 pos_x = (int) xevent.ClientMessageEvent.ptr3 >> 16;
626 pos_y = (int) xevent.ClientMessageEvent.ptr3 & 0xFFFF;
628 allowed = EffectFromAction (xevent.ClientMessageEvent.ptr5);
630 IntPtr parent, child, new_child;
631 parent = XplatUIX11.XRootWindow (display, 0);
635 new_child = IntPtr.Zero;
637 if (!XplatUIX11.XTranslateCoordinates (display,
638 parent, child, pos_x, pos_y,
639 out xd, out yd, out new_child))
641 if (new_child == IntPtr.Zero)
646 if (target != child) {
647 // We have moved into a new control
648 // or into a control for the first time
652 Hwnd hwnd = Hwnd.ObjectFromHandle (target);
653 Control c = Control.FromHandle (hwnd.client_window);
658 SendStatus (source, DragDropEffects.None);
664 position_recieved = true;
666 if (converts_pending > 0)
669 drag_event = new DragEventArgs (data, 0, pos_x, pos_y,
670 allowed, DragDropEffects.None);
671 control.DndEnter (drag_event);
672 SendStatus (source, drag_event.Effect);
675 drag_event.x = pos_x;
676 drag_event.y = pos_y;
677 SendStatus (source, drag_event.Effect);
678 control.DndOver (drag_event);
684 private void Finish ()
686 if (control != null) {
687 if (drag_event == null) {
689 data = new DataObject ();
690 drag_event = new DragEventArgs (data,
692 allowed, DragDropEffects.None);
694 control.DndLeave (drag_event);
699 private bool Accepting_HandleDropEvent (ref XEvent xevent)
701 if (control != null && drag_event != null) {
702 drag_event = new DragEventArgs (data,
704 allowed, DragDropEffects.None);
705 control.DndDrop (drag_event);
711 private bool Accepting_HandleLeaveEvent (ref XEvent xevent)
713 if (control != null && drag_event != null)
714 control.DndLeave (drag_event);
719 private bool HandleStatusEvent (ref XEvent xevent)
721 if (drag_data != null && drag_data.State == DragState.Entered) {
722 drag_data.WillAccept = ((int) xevent.ClientMessageEvent.ptr2 & 0x1) != 0;
723 Cursor cursor = CursorNo;
724 if (drag_data.WillAccept) {
725 // Same order as on MS
726 IntPtr action = xevent.ClientMessageEvent.ptr5;
727 if (action == XdndActionCopy)
729 else if (action == XdndActionLink)
731 else if (action == XdndActionMove)
736 // TODO: Try not to set the cursor so much
737 //if (cursor.Handle != CurrentCursorHandle) {
738 XChangeActivePointerGrab (display,
739 EventMask.ButtonMotionMask |
740 EventMask.PointerMotionMask |
741 EventMask.ButtonPressMask |
742 EventMask.ButtonReleaseMask,
743 cursor.Handle, IntPtr.Zero);
744 CurrentCursorHandle = cursor.Handle;
750 private DragDropEffects EffectFromAction (IntPtr action)
752 DragDropEffects allowed = DragDropEffects.None;
754 if (action == XdndActionCopy)
755 allowed = DragDropEffects.Copy;
756 else if (action == XdndActionMove)
757 allowed |= DragDropEffects.Move;
758 if (action == XdndActionLink)
759 allowed |= DragDropEffects.Link;
763 private IntPtr ActionFromEffect (DragDropEffects effect)
765 IntPtr action = IntPtr.Zero;
767 // We can't OR together actions on XDND so sadly the primary
768 // is the only one shown here
769 if ((effect & DragDropEffects.Copy) != 0)
770 action = XdndActionCopy;
771 else if ((effect & DragDropEffects.Move) != 0)
772 action = XdndActionMove;
773 else if ((effect & DragDropEffects.Link) != 0)
774 action = XdndActionLink;
778 private bool ConvertData (ref XEvent xevent)
782 if (source != XplatUIX11.XGetSelectionOwner (display, (int) XdndSelection)) {
786 Control mwfcontrol = MwfWindow (source);
788 if (mwfcontrol != null && drag_data != null) {
789 DataObject dragged = drag_data.Data as DataObject;
790 if (dragged != null) {
794 data = new DataObject ();
795 data.SetData (drag_data.Data);
800 foreach (IntPtr atom in SourceSupportedList (ref xevent)) {
801 MimeHandler handler = FindHandler (atom);
804 XConvertSelection (display, XdndSelection, handler.Type,
805 handler.NonProtocol, toplevel, 0 /* CurrentTime */);
812 private MimeHandler FindHandler (IntPtr atom)
814 if (atom == IntPtr.Zero)
816 foreach (MimeHandler handler in MimeHandlers) {
817 if (handler.Type == atom)
823 private MimeHandler FindHandler (string name)
825 foreach (MimeHandler handler in MimeHandlers) {
826 if (handler.Name == name)
832 private void SendStatus (IntPtr source, DragDropEffects effect)
834 XEvent xevent = new XEvent ();
836 xevent.AnyEvent.type = XEventName.ClientMessage;
837 xevent.AnyEvent.display = display;
838 xevent.ClientMessageEvent.window = source;
839 xevent.ClientMessageEvent.message_type = XdndStatus;
840 xevent.ClientMessageEvent.format = 32;
841 xevent.ClientMessageEvent.ptr1 = toplevel;
842 if (effect != DragDropEffects.None)
843 xevent.ClientMessageEvent.ptr2 = (IntPtr) 1;
845 xevent.ClientMessageEvent.ptr5 = ActionFromEffect (effect);
846 XSendEvent (display, source, false, 0, ref xevent);
849 private void SendEnter (IntPtr handle, IntPtr from, IntPtr [] supported)
851 XEvent xevent = new XEvent ();
853 xevent.AnyEvent.type = XEventName.ClientMessage;
854 xevent.AnyEvent.display = display;
855 xevent.ClientMessageEvent.window = handle;
856 xevent.ClientMessageEvent.message_type = XdndEnter;
857 xevent.ClientMessageEvent.format = 32;
858 xevent.ClientMessageEvent.ptr1 = from;
860 // (int) xevent.ClientMessageEvent.ptr2 & 0x1)
862 // xevent.ClientMessageEvent.ptr2 = (IntPtr) ptr2;
863 // (e)->xclient.data.l[1] = ((e)->xclient.data.l[1] & ~(0xFF << 24)) | ((v) << 24)
864 xevent.ClientMessageEvent.ptr2 = (IntPtr) (XdndVersion [0] << 24);
866 if (supported.Length > 0)
867 xevent.ClientMessageEvent.ptr3 = supported [0];
868 if (supported.Length > 1)
869 xevent.ClientMessageEvent.ptr4 = supported [1];
870 if (supported.Length > 2)
871 xevent.ClientMessageEvent.ptr5 = supported [2];
873 XSendEvent (display, handle, false, 0, ref xevent);
876 private void SendDrop (IntPtr handle, IntPtr from, IntPtr time)
878 XEvent xevent = new XEvent ();
880 xevent.AnyEvent.type = XEventName.ClientMessage;
881 xevent.AnyEvent.display = display;
882 xevent.ClientMessageEvent.window = handle;
883 xevent.ClientMessageEvent.message_type = XdndDrop;
884 xevent.ClientMessageEvent.format = 32;
885 xevent.ClientMessageEvent.ptr1 = from;
886 xevent.ClientMessageEvent.ptr3 = time;
888 XSendEvent (display, handle, false, 0, ref xevent);
891 private void SendPosition (IntPtr handle, IntPtr from, IntPtr action, int x, int y, IntPtr time)
893 XEvent xevent = new XEvent ();
895 xevent.AnyEvent.type = XEventName.ClientMessage;
896 xevent.AnyEvent.display = display;
897 xevent.ClientMessageEvent.window = handle;
898 xevent.ClientMessageEvent.message_type = XdndPosition;
899 xevent.ClientMessageEvent.format = 32;
900 xevent.ClientMessageEvent.ptr1 = from;
901 xevent.ClientMessageEvent.ptr3 = (IntPtr) ((x << 16) | (y & 0xFFFF));
902 xevent.ClientMessageEvent.ptr4 = time;
903 xevent.ClientMessageEvent.ptr5 = action;
905 XSendEvent (display, handle, false, 0, ref xevent);
908 private void SendLeave (IntPtr handle, IntPtr from)
910 XEvent xevent = new XEvent ();
912 xevent.AnyEvent.type = XEventName.ClientMessage;
913 xevent.AnyEvent.display = display;
914 xevent.ClientMessageEvent.window = handle;
915 xevent.ClientMessageEvent.message_type = XdndLeave;
916 xevent.ClientMessageEvent.format = 32;
917 xevent.ClientMessageEvent.ptr1 = from;
919 XSendEvent (display, handle, false, 0, ref xevent);
922 private void SendFinished ()
924 XEvent xevent = new XEvent ();
926 xevent.AnyEvent.type = XEventName.ClientMessage;
927 xevent.AnyEvent.display = display;
928 xevent.ClientMessageEvent.window = source;
929 xevent.ClientMessageEvent.message_type = XdndFinished;
930 xevent.ClientMessageEvent.format = 32;
931 xevent.ClientMessageEvent.ptr1 = toplevel;
933 XSendEvent (display, source, false, 0, ref xevent);
936 // There is a somewhat decent amount of overhead
937 // involved in setting up dnd so we do it lazily
938 // as a lot of applications do not even use it.
941 XdndAware = XInternAtom (display, "XdndAware", false);
942 XdndEnter = XInternAtom (display, "XdndEnter", false);
943 XdndLeave = XInternAtom (display, "XdndLeave", false);
944 XdndPosition = XInternAtom (display, "XdndPosition", false);
945 XdndStatus = XInternAtom (display, "XdndStatus", false);
946 XdndDrop = XInternAtom (display, "XdndDrop", false);
947 XdndSelection = XInternAtom (display, "XdndSelection", false);
948 XdndFinished = XInternAtom (display, "XdndFinished", false);
949 XdndTypeList = XInternAtom (display, "XdndTypeList", false);
950 XdndActionCopy = XInternAtom (display, "XdndActionCopy", false);
951 XdndActionMove = XInternAtom (display, "XdndActionMove", false);
952 XdndActionLink = XInternAtom (display, "XdndActionLink", false);
953 XdndActionPrivate = XInternAtom (display, "XdndActionPrivate", false);
954 XdndActionList = XInternAtom (display, "XdndActionList", false);
955 XdndActionDescription = XInternAtom (display, "XdndActionDescription", false);
956 XdndActionAsk = XInternAtom (display, "XdndActionAsk", false);
958 foreach (MimeHandler handler in MimeHandlers) {
959 handler.Type = XInternAtom (display, handler.Name, false);
960 handler.NonProtocol = XInternAtom (display,
961 String.Concat ("MWFNonP+", handler.Name), false);
966 private IntPtr [] SourceSupportedList (ref XEvent xevent)
971 if (((int) xevent.ClientMessageEvent.ptr2 & 0x1) == 0) {
972 res = new IntPtr [3];
973 res [0] = xevent.ClientMessageEvent.ptr3;
974 res [1] = xevent.ClientMessageEvent.ptr4;
975 res [2] = xevent.ClientMessageEvent.ptr5;
978 int format, count, remaining;
979 IntPtr data = IntPtr.Zero;
981 XGetWindowProperty (display, source, XdndTypeList,
982 0, 32, false, (IntPtr) Atom.XA_ATOM,
983 out type, out format, out count,
984 out remaining, out data);
986 res = new IntPtr [count];
987 for (int i = 0; i < count; i++) {
988 res [i] = (IntPtr) Marshal.ReadInt32 (data, i *
989 Marshal.SizeOf (typeof (int)));
998 private string GetText (ref XEvent xevent, bool unicode)
1004 StringBuilder builder = new StringBuilder ();
1008 IntPtr data = IntPtr.Zero;
1010 if (0 != XGetWindowProperty (display,
1011 xevent.AnyEvent.window,
1012 (IntPtr) xevent.SelectionEvent.property,
1014 (IntPtr) Atom.AnyPropertyType, out actual_type,
1015 out actual_fmt, out nitems, out bytes_after,
1022 builder.Append (Marshal.PtrToStringUni (data));
1024 builder.Append (Marshal.PtrToStringAnsi (data));
1028 } while (bytes_after > 0);
1031 return builder.ToString ();
1034 private MemoryStream GetData (ref XEvent xevent)
1040 MemoryStream res = new MemoryStream ();
1044 IntPtr data = IntPtr.Zero;
1046 if (0 != XGetWindowProperty (display,
1047 xevent.AnyEvent.window,
1048 (IntPtr) xevent.SelectionEvent.property,
1050 (IntPtr) Atom.AnyPropertyType, out actual_type,
1051 out actual_fmt, out nitems, out bytes_after,
1057 for (int i = 0; i < nitems; i++)
1058 res.WriteByte (Marshal.ReadByte (data, i));
1062 } while (bytes_after > 0);
1066 private Control MwfWindow (IntPtr window)
1068 Hwnd hwnd = Hwnd.ObjectFromHandle (window);
1072 Control res = Control.FromHandle (hwnd.client_window);
1076 private bool IsWindowDndAware (IntPtr handle)
1079 // Check the version number, we need greater than 3
1081 int format, count, remaining;
1082 IntPtr data = IntPtr.Zero;
1084 XGetWindowProperty (display, handle, XdndAware, 0, 0x8000000, false,
1085 (IntPtr) Atom.XA_ATOM, out actual, out format,
1086 out count, out remaining, out data);
1088 if (actual != (IntPtr) Atom.XA_ATOM || format != 32 ||
1089 count == 0 || data == IntPtr.Zero) {
1090 if (data != IntPtr.Zero)
1095 int version = Marshal.ReadInt32 (data, 0);
1098 Console.Error.WriteLine ("XDND Version too old (" + version + ").");
1103 // First type is actually the XDND version
1106 for (int i = 1; i < count; i++) {
1107 IntPtr type = (IntPtr) Marshal.ReadInt32 (data, i *
1108 Marshal.SizeOf (typeof (int)));
1109 for (int j = 0; j < drag_data.SupportedTypes.Length; j++) {
1110 if (drag_data.SupportedTypes [j] == type) {
1122 private IntPtr [] DetermineSupportedTypes (object data)
1124 ArrayList res = new ArrayList ();
1126 if (data is string) {
1127 MimeHandler handler = FindHandler ("text/plain");
1128 if (handler != null)
1129 res.Add (handler.Type);
1130 }/* else if (data is Bitmap)
1135 if (data is IDataObject) {
1140 if (data is ISerializable) {
1141 MimeHandler handler = FindHandler ("application/x-mono-serialized-object");
1142 if (handler != null)
1143 res.Add (handler.Type);
1146 return (IntPtr []) res.ToArray (typeof (IntPtr));
1149 [DllImport ("libX11")]
1150 private extern static string XGetAtomName (IntPtr display, IntPtr atom);
1152 [DllImport ("libX11")]
1153 private extern static IntPtr XInternAtom (IntPtr display, string atom_name, bool only_if_exists);
1155 [DllImport ("libX11")]
1156 private extern static int XChangeProperty (IntPtr display, IntPtr window, IntPtr property,
1157 IntPtr format, int type, PropertyMode mode, uint [] atoms, int nelements);
1159 [DllImport ("libX11")]
1160 private extern static int XGetWindowProperty (IntPtr display, IntPtr window,
1161 IntPtr atom, int long_offset, int long_length, bool delete,
1162 IntPtr req_type, out IntPtr actual_type, out int actual_format,
1163 out int nitems, out int bytes_after, out IntPtr prop);
1165 [DllImport ("libX11")]
1166 internal extern static int XSendEvent (IntPtr display, IntPtr window,
1167 bool propagate, EventMask event_mask, ref XEvent send_event);
1169 [DllImport ("libX11")]
1170 internal extern static int XConvertSelection (IntPtr display, IntPtr selection,
1171 IntPtr target, IntPtr property, IntPtr requestor, int time);
1173 [DllImport ("libX11")]
1174 internal extern static IntPtr XGetSelectionOwner (IntPtr display, IntPtr selection);
1176 [DllImport ("libX11")]
1177 internal extern static int XGrabPointer (IntPtr display, IntPtr window,
1178 bool owner_events, EventMask event_mask, GrabMode pointer_mode,
1179 GrabMode keyboard_mode, IntPtr confine_to, IntPtr cursor, uint timestamp);
1181 [DllImport ("libX11")]
1182 internal extern static bool XQueryPointer (IntPtr display, IntPtr window, out IntPtr root,
1183 out IntPtr child, out int root_x, out int root_y, out int win_x,
1184 out int win_y, out int keys_buttons);
1186 [DllImport ("libX11")]
1187 internal extern static int XAllowEvents (IntPtr display, int event_mode, IntPtr time);
1189 [DllImport ("libX11")]
1190 internal extern static int XFree(IntPtr data);
1192 [DllImport ("libX11")]
1193 internal extern static int XFetchName (IntPtr display, IntPtr window, ref IntPtr window_name);
1194 [DllImport ("libX11")]
1195 internal extern static int XChangeActivePointerGrab (IntPtr display, EventMask event_mask, IntPtr cursor, IntPtr time);