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 == (IntPtr)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 == (IntPtr)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 IntPtr [] XdndVersion = new IntPtr [] { new IntPtr (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 XplatUIX11.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, IntPtr.Zero);
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, XdndSelection,
410 xevent.ButtonEvent.time);
413 Console.Error.WriteLine ("Could not take ownership of XdndSelection aborting drag.");
418 suc = XplatUIX11.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*/, IntPtr.Zero);
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 (XplatUIX11.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 XplatUIX11.XFetchName (display, handle, ref textptr);
504 if (textptr != IntPtr.Zero) {
505 text = Marshal.PtrToStringAnsi(textptr);
506 XplatUIX11.XFree (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 != XplatUIX11.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 != XdndSelection)
560 MimeHandler handler = FindHandler (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 = IntPtr.Zero;
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 XplatUIX11.XSendEvent (display, xevent.SelectionRequestEvent.requestor, false,
588 (IntPtr)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 XplatUIX11.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, 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 SetDataWithFormats (drag_data.Data);
800 foreach (IntPtr atom in SourceSupportedList (ref xevent)) {
801 MimeHandler handler = FindHandler (atom);
804 XplatUIX11.XConvertSelection (display, XdndSelection, handler.Type,
805 handler.NonProtocol, toplevel, IntPtr.Zero /* CurrentTime */);
812 private void SetDataWithFormats (object value)
814 if (value is string) {
815 data.SetData (DataFormats.Text, value);
816 data.SetData (DataFormats.UnicodeText, value);
819 data.SetData (value);
822 private MimeHandler FindHandler (IntPtr atom)
824 if (atom == IntPtr.Zero)
826 foreach (MimeHandler handler in MimeHandlers) {
827 if (handler.Type == atom)
833 private MimeHandler FindHandler (string name)
835 foreach (MimeHandler handler in MimeHandlers) {
836 if (handler.Name == name)
842 private void SendStatus (IntPtr source, DragDropEffects effect)
844 XEvent xevent = new XEvent ();
846 xevent.AnyEvent.type = XEventName.ClientMessage;
847 xevent.AnyEvent.display = display;
848 xevent.ClientMessageEvent.window = source;
849 xevent.ClientMessageEvent.message_type = XdndStatus;
850 xevent.ClientMessageEvent.format = 32;
851 xevent.ClientMessageEvent.ptr1 = toplevel;
852 if (effect != DragDropEffects.None)
853 xevent.ClientMessageEvent.ptr2 = (IntPtr) 1;
855 xevent.ClientMessageEvent.ptr5 = ActionFromEffect (effect);
856 XplatUIX11.XSendEvent (display, source, false, IntPtr.Zero, ref xevent);
859 private void SendEnter (IntPtr handle, IntPtr from, IntPtr [] supported)
861 XEvent xevent = new XEvent ();
863 xevent.AnyEvent.type = XEventName.ClientMessage;
864 xevent.AnyEvent.display = display;
865 xevent.ClientMessageEvent.window = handle;
866 xevent.ClientMessageEvent.message_type = XdndEnter;
867 xevent.ClientMessageEvent.format = 32;
868 xevent.ClientMessageEvent.ptr1 = from;
870 // (int) xevent.ClientMessageEvent.ptr2 & 0x1)
872 // xevent.ClientMessageEvent.ptr2 = (IntPtr) ptr2;
873 // (e)->xclient.data.l[1] = ((e)->xclient.data.l[1] & ~(0xFF << 24)) | ((v) << 24)
874 xevent.ClientMessageEvent.ptr2 = (IntPtr) ((long)XdndVersion [0] << 24);
876 if (supported.Length > 0)
877 xevent.ClientMessageEvent.ptr3 = supported [0];
878 if (supported.Length > 1)
879 xevent.ClientMessageEvent.ptr4 = supported [1];
880 if (supported.Length > 2)
881 xevent.ClientMessageEvent.ptr5 = supported [2];
883 XplatUIX11.XSendEvent (display, handle, false, IntPtr.Zero, ref xevent);
886 private void SendDrop (IntPtr handle, IntPtr from, IntPtr time)
888 XEvent xevent = new XEvent ();
890 xevent.AnyEvent.type = XEventName.ClientMessage;
891 xevent.AnyEvent.display = display;
892 xevent.ClientMessageEvent.window = handle;
893 xevent.ClientMessageEvent.message_type = XdndDrop;
894 xevent.ClientMessageEvent.format = 32;
895 xevent.ClientMessageEvent.ptr1 = from;
896 xevent.ClientMessageEvent.ptr3 = time;
898 XplatUIX11.XSendEvent (display, handle, false, IntPtr.Zero, ref xevent);
901 private void SendPosition (IntPtr handle, IntPtr from, IntPtr action, int x, int y, IntPtr time)
903 XEvent xevent = new XEvent ();
905 xevent.AnyEvent.type = XEventName.ClientMessage;
906 xevent.AnyEvent.display = display;
907 xevent.ClientMessageEvent.window = handle;
908 xevent.ClientMessageEvent.message_type = XdndPosition;
909 xevent.ClientMessageEvent.format = 32;
910 xevent.ClientMessageEvent.ptr1 = from;
911 xevent.ClientMessageEvent.ptr3 = (IntPtr) ((x << 16) | (y & 0xFFFF));
912 xevent.ClientMessageEvent.ptr4 = time;
913 xevent.ClientMessageEvent.ptr5 = action;
915 XplatUIX11.XSendEvent (display, handle, false, IntPtr.Zero, ref xevent);
918 private void SendLeave (IntPtr handle, IntPtr from)
920 XEvent xevent = new XEvent ();
922 xevent.AnyEvent.type = XEventName.ClientMessage;
923 xevent.AnyEvent.display = display;
924 xevent.ClientMessageEvent.window = handle;
925 xevent.ClientMessageEvent.message_type = XdndLeave;
926 xevent.ClientMessageEvent.format = 32;
927 xevent.ClientMessageEvent.ptr1 = from;
929 XplatUIX11.XSendEvent (display, handle, false, IntPtr.Zero, ref xevent);
932 private void SendFinished ()
934 XEvent xevent = new XEvent ();
936 xevent.AnyEvent.type = XEventName.ClientMessage;
937 xevent.AnyEvent.display = display;
938 xevent.ClientMessageEvent.window = source;
939 xevent.ClientMessageEvent.message_type = XdndFinished;
940 xevent.ClientMessageEvent.format = 32;
941 xevent.ClientMessageEvent.ptr1 = toplevel;
943 XplatUIX11.XSendEvent (display, source, false, IntPtr.Zero, ref xevent);
946 // There is a somewhat decent amount of overhead
947 // involved in setting up dnd so we do it lazily
948 // as a lot of applications do not even use it.
951 XdndAware = XplatUIX11.XInternAtom (display, "XdndAware", false);
952 XdndEnter = XplatUIX11.XInternAtom (display, "XdndEnter", false);
953 XdndLeave = XplatUIX11.XInternAtom (display, "XdndLeave", false);
954 XdndPosition = XplatUIX11.XInternAtom (display, "XdndPosition", false);
955 XdndStatus = XplatUIX11.XInternAtom (display, "XdndStatus", false);
956 XdndDrop = XplatUIX11.XInternAtom (display, "XdndDrop", false);
957 XdndSelection = XplatUIX11.XInternAtom (display, "XdndSelection", false);
958 XdndFinished = XplatUIX11.XInternAtom (display, "XdndFinished", false);
959 XdndTypeList = XplatUIX11.XInternAtom (display, "XdndTypeList", false);
960 XdndActionCopy = XplatUIX11.XInternAtom (display, "XdndActionCopy", false);
961 XdndActionMove = XplatUIX11.XInternAtom (display, "XdndActionMove", false);
962 XdndActionLink = XplatUIX11.XInternAtom (display, "XdndActionLink", false);
963 XdndActionPrivate = XplatUIX11.XInternAtom (display, "XdndActionPrivate", false);
964 XdndActionList = XplatUIX11.XInternAtom (display, "XdndActionList", false);
965 XdndActionDescription = XplatUIX11.XInternAtom (display, "XdndActionDescription", false);
966 XdndActionAsk = XplatUIX11.XInternAtom (display, "XdndActionAsk", false);
968 foreach (MimeHandler handler in MimeHandlers) {
969 handler.Type = XplatUIX11.XInternAtom (display, handler.Name, false);
970 handler.NonProtocol = XplatUIX11.XInternAtom (display,
971 String.Concat ("MWFNonP+", handler.Name), false);
976 private IntPtr [] SourceSupportedList (ref XEvent xevent)
981 if (((int) xevent.ClientMessageEvent.ptr2 & 0x1) == 0) {
982 res = new IntPtr [3];
983 res [0] = xevent.ClientMessageEvent.ptr3;
984 res [1] = xevent.ClientMessageEvent.ptr4;
985 res [2] = xevent.ClientMessageEvent.ptr5;
991 IntPtr data = IntPtr.Zero;
993 XplatUIX11.XGetWindowProperty (display, source, XdndTypeList,
994 IntPtr.Zero, new IntPtr(32), false, (IntPtr) Atom.XA_ATOM,
995 out type, out format, out count,
996 out remaining, ref data);
998 res = new IntPtr [count.ToInt32()];
999 for (int i = 0; i < count.ToInt32(); i++) {
1000 res [i] = (IntPtr) Marshal.ReadInt32 (data, i *
1001 Marshal.SizeOf (typeof (int)));
1004 XplatUIX11.XFree (data);
1010 private string GetText (ref XEvent xevent, bool unicode)
1016 StringBuilder builder = new StringBuilder ();
1020 IntPtr data = IntPtr.Zero;
1022 if (0 != XplatUIX11.XGetWindowProperty (display,
1023 xevent.AnyEvent.window,
1024 (IntPtr) xevent.SelectionEvent.property,
1025 IntPtr.Zero, new IntPtr(0xffffff), false,
1026 (IntPtr) Atom.AnyPropertyType, out actual_type,
1027 out actual_fmt, out nitems, out bytes_after,
1029 XplatUIX11.XFree (data);
1034 builder.Append (Marshal.PtrToStringUni (data));
1036 builder.Append (Marshal.PtrToStringAnsi (data));
1037 nread += nitems.ToInt32();
1039 XplatUIX11.XFree (data);
1040 } while (bytes_after.ToInt32() > 0);
1043 return builder.ToString ();
1046 private MemoryStream GetData (ref XEvent xevent)
1052 MemoryStream res = new MemoryStream ();
1056 IntPtr data = IntPtr.Zero;
1058 if (0 != XplatUIX11.XGetWindowProperty (display,
1059 xevent.AnyEvent.window,
1060 (IntPtr) xevent.SelectionEvent.property,
1061 IntPtr.Zero, new IntPtr(0xffffff), false,
1062 (IntPtr) Atom.AnyPropertyType, out actual_type,
1063 out actual_fmt, out nitems, out bytes_after,
1065 XplatUIX11.XFree (data);
1069 for (int i = 0; i < nitems.ToInt32(); i++)
1070 res.WriteByte (Marshal.ReadByte (data, i));
1071 nread += nitems.ToInt32();
1073 XplatUIX11.XFree (data);
1074 } while (bytes_after.ToInt32() > 0);
1078 private Control MwfWindow (IntPtr window)
1080 Hwnd hwnd = Hwnd.ObjectFromHandle (window);
1084 Control res = Control.FromHandle (hwnd.client_window);
1088 private bool IsWindowDndAware (IntPtr handle)
1091 // Check the version number, we need greater than 3
1096 IntPtr data = IntPtr.Zero;
1098 XplatUIX11.XGetWindowProperty (display, handle, XdndAware, IntPtr.Zero, new IntPtr(0x8000000), false,
1099 (IntPtr) Atom.XA_ATOM, out actual, out format,
1100 out count, out remaining, ref data);
1102 if (actual != (IntPtr) Atom.XA_ATOM || format != 32 ||
1103 count.ToInt32() == 0 || data == IntPtr.Zero) {
1104 if (data != IntPtr.Zero)
1105 XplatUIX11.XFree (data);
1109 int version = Marshal.ReadInt32 (data, 0);
1112 Console.Error.WriteLine ("XDND Version too old (" + version + ").");
1113 XplatUIX11.XFree (data);
1117 // First type is actually the XDND version
1118 if (count.ToInt32() > 1) {
1120 for (int i = 1; i < count.ToInt32(); i++) {
1121 IntPtr type = (IntPtr) Marshal.ReadInt32 (data, i *
1122 Marshal.SizeOf (typeof (int)));
1123 for (int j = 0; j < drag_data.SupportedTypes.Length; j++) {
1124 if (drag_data.SupportedTypes [j] == type) {
1132 XplatUIX11.XFree (data);
1136 private IntPtr [] DetermineSupportedTypes (object data)
1138 ArrayList res = new ArrayList ();
1140 if (data is string) {
1141 MimeHandler handler = FindHandler ("text/plain");
1142 if (handler != null)
1143 res.Add (handler.Type);
1144 }/* else if (data is Bitmap)
1149 if (data is IDataObject) {
1154 if (data is ISerializable) {
1155 MimeHandler handler = FindHandler ("application/x-mono-serialized-object");
1156 if (handler != null)
1157 res.Add (handler.Type);
1160 return (IntPtr []) res.ToArray (typeof (IntPtr));