Merge branch 'nxagent'

1 files changed, 1631 insertions, 0 deletions

diff --git a/nx-X11/programs/Xserver/hw/nxagent/Clipboard.c b/nx-X11/programs/Xserver/hw/nxagent/Clipboard.c
new file mode 100644
index 000000000..2742e147f
--- /dev/null
+++ b/nx-X11/programs/Xserver/hw/nxagent/Clipboard.c
@@ -0,0 +1,1631 @@
+/**************************************************************************/
+/*                                                                        */
+/* Copyright (c) 2001, 2011 NoMachine, http://www.nomachine.com/.         */
+/*                                                                        */
+/* NXAGENT, NX protocol compression and NX extensions to this software    */
+/* are copyright of NoMachine. Redistribution and use of the present      */
+/* software is allowed according to terms specified in the file LICENSE   */
+/* which comes in the source distribution.                                */
+/*                                                                        */
+/* Check http://www.nomachine.com/licensing.html for applicability.       */
+/*                                                                        */
+/* NX and NoMachine are trademarks of Medialogic S.p.A.                   */
+/*                                                                        */
+/* All rights reserved.                                                   */
+/*                                                                        */
+/**************************************************************************/
+
+#define NEED_EVENTS
+
+#include "X.h"
+#include "Xproto.h"
+#include "Xatom.h"
+#include "selection.h"
+#include "windowstr.h"
+
+#include "Windows.h"
+#include "Atoms.h"
+#include "Agent.h"
+#include "Args.h"
+#include "Trap.h"
+#include "Rootless.h"
+#include "Clipboard.h"
+
+#include "gcstruct.h"
+#include "xfixeswire.h"
+#include <X11/extensions/Xfixes.h>
+
+/*
+ * Use asyncronous get property replies.
+ */
+
+#include "NXlib.h"
+
+/*
+ * Set here the required log level.
+ */
+
+#define PANIC
+#define WARNING
+#undef  TEST
+#undef  DEBUG
+
+/*
+ * These are defined in the dispatcher.
+ */
+
+extern int NumCurrentSelections;
+extern Selection *CurrentSelections;
+
+int nxagentLastClipboardClient = -1;
+
+static int agentClipboardStatus;
+static int clientAccum;
+
+Atom serverCutProperty;
+Atom clientCutProperty;
+static Window serverWindow;
+
+static const int nxagentPrimarySelection = 0;
+static const int nxagentClipboardSelection = 1;
+static const int nxagentMaxSelections = 2;
+
+typedef struct _SelectionOwner
+{
+    Atom selection;
+    ClientPtr client;
+    Window window;
+    WindowPtr windowPtr;
+    Time lastTimeChanged;
+
+} SelectionOwner;
+
+static SelectionOwner *lastSelectionOwner;
+static Atom nxagentLastRequestedSelection;
+static Atom nxagentClipboardAtom;
+static Atom nxagentTimestampAtom;
+
+/*
+ * Needed to handle the notify selection event to
+ * be sent to client once the selection property
+ * has been retrieved from the real X server.
+ */
+
+typedef enum
+{
+  SelectionStageNone,
+  SelectionStageQuerySize,
+  SelectionStageWaitSize,
+  SelectionStageQueryData,
+  SelectionStageWaitData
+} ClientSelectionStage;
+
+static WindowPtr     lastClientWindowPtr;
+static ClientPtr     lastClientClientPtr;
+static Window        lastClientRequestor;
+static Atom          lastClientProperty;
+static Atom          lastClientSelection;
+static Atom          lastClientTarget;
+static Time          lastClientTime;
+static Time          lastClientReqTime;
+static unsigned long lastClientPropertySize;
+
+static ClientSelectionStage lastClientStage;
+
+static Window lastServerRequestor;
+static Atom   lastServerProperty;
+static Atom   lastServerTarget;
+static Time   lastServerTime;
+
+static Atom serverTARGETS;
+static Atom serverTEXT;
+static Atom serverUTF8_STRING;
+static Atom clientTARGETS;
+static Atom clientTEXT;
+static Atom clientCOMPOUND_TEXT;
+static Atom clientUTF8_STRING;
+
+static char szAgentTARGETS[] = "TARGETS";
+static char szAgentTEXT[] = "TEXT";
+static char szAgentCOMPOUND_TEXT[] = "COMPOUND_TEXT";
+static char szAgentUTF8_STRING[] = "UTF8_STRING";
+static char szAgentNX_CUT_BUFFER_CLIENT[] = "NX_CUT_BUFFER_CLIENT";
+
+/*
+ * Save the values queried from X server.
+ */
+
+XFixesAgentInfoRec nxagentXFixesInfo = { -1, -1, -1, 0 };
+
+extern Display *nxagentDisplay;
+
+Bool nxagentValidServerTargets(Atom target);
+void nxagentSendSelectionNotify(Atom property);
+void nxagentTransferSelection(int resource);
+void nxagentCollectPropertyEvent(int resource);
+void nxagentResetSelectionOwner(void);
+WindowPtr nxagentGetClipboardWindow(Atom property, WindowPtr pWin);
+void nxagentNotifyConvertFailure(ClientPtr client, Window requestor,
+                                     Atom selection, Atom target, Time time);
+int nxagentSendNotify(xEvent *event);
+
+/*
+ * This is from NXproperty.c.
+ */
+
+int GetWindowProperty(WindowPtr pWin, Atom property, long longOffset, long longLength,
+                          Bool delete, Atom type, Atom *actualType, int *format,
+                              unsigned long *nItems, unsigned long *bytesAfter,
+                                  unsigned char **propData);
+
+Bool nxagentValidServerTargets(Atom target)
+{
+  #ifdef DEBUG
+  fprintf(stderr, "nxagentValidServerTargets: Got called.\n");
+  #endif
+
+  if (target == XA_STRING) return True;
+  if (target == serverTEXT) return True;
+
+  return False;
+}
+
+void nxagentClearClipboard(ClientPtr pClient, WindowPtr pWindow)
+{
+  int i;
+
+  #ifdef DEBUG
+  fprintf(stderr, "nxagentClearClipboard: Called with client [%p] window [%p].\n",
+              (void *) pClient, (void *) pWindow);
+  #endif
+
+  /*
+   * Only for PRIMARY and CLIPBOARD selections.
+   */
+
+  for (i = 0; i < nxagentMaxSelections; i++)
+  {
+    if ((pClient != NULL && lastSelectionOwner[i].client == pClient) ||
+            (pWindow != NULL && lastSelectionOwner[i].windowPtr == pWindow))
+    {
+      #ifdef TEST
+      fprintf(stderr, "nxagentClearClipboard: Resetting state with client [%p] window [%p].\n",
+                  (void *) pClient, (void *) pWindow);
+      #endif
+
+      lastSelectionOwner[i].client = NULL;
+      lastSelectionOwner[i].window = None;
+      lastSelectionOwner[i].windowPtr = NULL;
+      lastSelectionOwner[i].lastTimeChanged = GetTimeInMillis();
+
+      lastClientWindowPtr = NULL;
+      lastClientStage = SelectionStageNone;
+
+      lastServerRequestor = None;
+    }
+  }
+ 
+  if (pWindow == lastClientWindowPtr)
+  {
+    lastClientWindowPtr = NULL;
+    lastClientStage = SelectionStageNone;
+  }
+
+}
+
+void nxagentClearSelection(XEvent *X)
+{
+  xEvent x;
+
+  int i = 0;
+
+  #ifdef DEBUG
+  fprintf(stderr, "nxagentClearSelection: Got called.\n");
+  #endif
+
+  if (agentClipboardStatus != 1 ||
+          nxagentOption(Clipboard) == ClipboardServer)
+  {
+    return;
+  }
+
+  #ifdef DEBUG
+  fprintf(stderr, "nxagentClearSelection: SelectionClear event.\n");
+  #endif
+
+  while ((i < nxagentMaxSelections) &&
+            (lastSelectionOwner[i].selection != X->xselectionclear.selection))
+  {
+    i++;
+  }
+
+  if (i < nxagentMaxSelections)
+  {
+    if (lastSelectionOwner[i].client != NULL)
+    {
+      x.u.u.type = SelectionClear;
+      x.u.selectionClear.time = GetTimeInMillis();
+      x.u.selectionClear.window = lastSelectionOwner[i].window;
+      x.u.selectionClear.atom = CurrentSelections[i].selection;
+
+      (void) TryClientEvents(lastSelectionOwner[i].client, &x, 1,
+                             NoEventMask, NoEventMask,
+                             NullGrab);
+    }
+
+    CurrentSelections[i].window = WindowTable[0]->drawable.id;
+    CurrentSelections[i].client = NullClient;
+
+    lastSelectionOwner[i].client = NULL;
+    lastSelectionOwner[i].window = None;
+    lastSelectionOwner[i].lastTimeChanged = GetTimeInMillis();
+  }
+
+  lastClientWindowPtr = NULL;
+  lastClientStage = SelectionStageNone;
+}
+
+void nxagentRequestSelection(XEvent *X)
+{
+  int result;
+  int i = 0;
+  XSelectionEvent eventSelection;
+
+  #ifdef DEBUG
+  fprintf(stderr, "nxagentRequestSelection: Got called.\n");
+  #endif
+
+  if (agentClipboardStatus != 1)
+  {
+    return;
+  }
+
+  if (!nxagentValidServerTargets(X->xselectionrequest.target) ||
+         (lastServerRequestor != None) ||
+             ((X->xselectionrequest.selection != lastSelectionOwner[nxagentPrimarySelection].selection) &&
+                 (X->xselectionrequest.selection != lastSelectionOwner[nxagentClipboardSelection].selection)))
+  {
+/*
+FIXME: Do we need this?
+
+    char *strTarget;
+
+    strTarget = XGetAtomName(nxagentDisplay, X->xselectionrequest.target);
+
+    fprintf(stderr, "SelectionRequest event aborting sele=[%s] target=[%s]\n",
+                validateString(NameForAtom(X->xselectionrequest.selection)),
+                    validateString(NameForAtom(X->xselectionrequest.target)));
+
+    fprintf(stderr, "SelectionRequest event aborting sele=[%s] ext target=[%s] Atom size is [%d]\n",
+                validateString(NameForAtom(X->xselectionrequest.selection)), strTarget, sizeof(Atom));
+
+    if (strTarget != NULL)
+    {
+      XFree(strTarget);
+    }
+*/
+    eventSelection.property = None;
+
+    if (X->xselectionrequest.target == serverTARGETS)
+    {
+      Atom xa_STRING = XA_STRING;
+      result = XChangeProperty (nxagentDisplay,
+                                X->xselectionrequest.requestor,
+                                X->xselectionrequest.property,
+                                XInternAtom(nxagentDisplay, "ATOM", 0),
+                                sizeof(Atom)*8,
+                                PropModeReplace,
+                                (unsigned char*)&xa_STRING,
+                                1);
+      eventSelection.property = X->xselectionrequest.property;
+    }
+
+    if (X->xselectionrequest.target == nxagentTimestampAtom)
+    {
+      while ((i < NumCurrentSelections) &&
+                lastSelectionOwner[i].selection != X->xselectionrequest.selection) i++;
+
+      if (i < NumCurrentSelections)
+      {
+        result = XChangeProperty(nxagentDisplay,
+                                 X->xselectionrequest.requestor,
+                                 X->xselectionrequest.property,
+                                 X->xselectionrequest.target,
+                                 32,
+                                 PropModeReplace,
+                                 (unsigned char *) &lastSelectionOwner[i].lastTimeChanged,
+                                 1);
+        eventSelection.property = X->xselectionrequest.property;
+      }
+    }
+
+    eventSelection.type = SelectionNotify;
+    eventSelection.send_event = True;
+    eventSelection.display = nxagentDisplay;
+    eventSelection.requestor = X->xselectionrequest.requestor;
+    eventSelection.selection = X->xselectionrequest.selection;
+    eventSelection.target = X->xselectionrequest.target;
+    eventSelection.time = X->xselectionrequest.time;
+
+    result = XSendEvent(nxagentDisplay,
+                        eventSelection.requestor,
+                        False,
+                        0L,
+                        (XEvent *) &eventSelection);
+
+    #ifdef DEBUG
+    if (result == BadValue || result == BadWindow)
+    {
+      fprintf(stderr, "nxagentRequestSelection: WARNING! XSendEvent failed.\n");
+    }
+    else
+    {
+      fprintf(stderr, "nxagentRequestSelection: XSendEvent sent to window [0x%lx].\n",
+                  eventSelection.requestor);
+    }
+    #endif
+
+    return;
+  }
+
+  /*
+   * This is necessary in nxagentGetClipboardWindow.
+   */
+
+  nxagentLastRequestedSelection = X->xselectionrequest.selection;
+
+  while ((i < nxagentMaxSelections) &&
+            (lastSelectionOwner[i].selection != X->xselectionrequest.selection))
+  {
+    i++;
+  }
+
+  if (i < nxagentMaxSelections)
+  {
+    if ((lastClientWindowPtr != NULL) && (lastSelectionOwner[i].client != NULL))
+    {
+      XConvertSelection(nxagentDisplay, CurrentSelections[i].selection,
+                            X->xselectionrequest.target, serverCutProperty,
+                                serverWindow, lastClientTime);
+
+      #ifdef DEBUG
+      fprintf(stderr, "nxagentRequestSelection: Sent XConvertSelection.\n");
+      #endif
+    }
+    else
+    {
+      if (lastSelectionOwner[i].client != NULL && 
+             nxagentOption(Clipboard) != ClipboardClient)
+      {
+        xEvent x;
+
+        lastServerProperty = X->xselectionrequest.property;
+        lastServerRequestor = X->xselectionrequest.requestor;
+        lastServerTarget = X->xselectionrequest.target;
+        lastServerTime = X->xselectionrequest.time;
+
+        x.u.u.type = SelectionRequest;
+        x.u.selectionRequest.time = GetTimeInMillis();
+        x.u.selectionRequest.owner = lastSelectionOwner[i].window;
+
+        /*
+         * Fictitious window.
+         */
+
+        x.u.selectionRequest.requestor = WindowTable[0]->drawable.id;
+
+        /*
+         * Don't send the same window, some programs are
+         * clever and verify cut and paste operations
+         * inside the same window and don't Notify at all.
+         *
+         * x.u.selectionRequest.requestor = lastSelectionOwnerWindow;
+         */
+
+        x.u.selectionRequest.selection = CurrentSelections[i].selection;
+
+        /*
+         * x.u.selectionRequest.target = X->xselectionrequest.target;
+         */
+
+        x.u.selectionRequest.target = XA_STRING;
+        x.u.selectionRequest.property = clientCutProperty;
+
+        (void) TryClientEvents(lastSelectionOwner[i].client, &x, 1,
+                               NoEventMask, NoEventMask /* CantBeFiltered */,
+                               NullGrab);
+
+        #ifdef DEBUG
+        fprintf(stderr, "nxagentRequestSelection: Executed TryClientEvents with clientCutProperty.\n");
+        #endif
+      }
+      else
+      {
+        /*
+         * Probably we must to send a Notify
+         * to requestor with property None.
+         */
+
+        eventSelection.type = SelectionNotify;
+        eventSelection.send_event = True;
+        eventSelection.display = nxagentDisplay;
+        eventSelection.requestor = X->xselectionrequest.requestor;
+        eventSelection.selection = X->xselectionrequest.selection;
+        eventSelection.target = X->xselectionrequest.target;
+        eventSelection.property = None;
+        eventSelection.time = X->xselectionrequest.time;
+
+        result = XSendEvent(nxagentDisplay,
+                            eventSelection.requestor,
+                            False,
+                            0L,
+                            (XEvent *) &eventSelection);
+
+        #ifdef DEBUG
+        fprintf(stderr, "nxagentRequestSelection: Executed XSendEvent with property None.\n");
+        #endif
+      }
+    }
+  }
+}
+
+void nxagentSendSelectionNotify(Atom property)
+{
+  xEvent x;
+
+  #ifdef DEBUG
+  fprintf (stderr, "nxagentSendSelectionNotify: Sending event to client [%d].\n",
+               lastClientClientPtr -> index);
+  #endif
+
+  x.u.u.type = SelectionNotify;
+
+  x.u.selectionNotify.time = lastClientTime;
+  x.u.selectionNotify.requestor = lastClientRequestor;
+  x.u.selectionNotify.selection = lastClientSelection;
+  x.u.selectionNotify.target = lastClientTarget;
+
+  x.u.selectionNotify.property = property;
+
+  TryClientEvents(lastClientClientPtr, &x, 1, NoEventMask,
+                      NoEventMask , NullGrab);
+
+  return;
+}
+
+void nxagentTransferSelection(int resource)
+{
+  int result;
+
+  if (lastClientClientPtr -> index != resource)
+  {
+    #ifdef DEBUG
+    fprintf (stderr, "nxagentTransferSelection: WARNING! Inconsistent resource [%d] with current client [%d].\n",
+                 resource, lastClientClientPtr -> index);
+    #endif
+
+    nxagentSendSelectionNotify(None);
+
+    lastClientWindowPtr = NULL;
+    lastClientStage = SelectionStageNone;
+
+    return;
+  }
+
+  switch (lastClientStage)
+  {
+    case SelectionStageQuerySize:
+    {
+      /*
+       * Don't get data yet, just get size. We skip
+       * this stage in current implementation and
+       * go straight to the data.
+       */
+
+      nxagentLastClipboardClient = NXGetCollectPropertyResource(nxagentDisplay);
+
+      if (nxagentLastClipboardClient == -1)
+      {
+        #ifdef WARNING
+        fprintf(stderr, "nxagentTransferSelection: WARNING! Asyncronous GetProperty queue full.\n");
+        #endif
+
+        result = -1;
+      }
+      else
+      {
+        result = NXCollectProperty(nxagentDisplay,
+                                   nxagentLastClipboardClient,
+                                   serverWindow,
+                                   serverCutProperty,
+                                   0,
+                                   0,
+                                   False,
+                                   AnyPropertyType);
+      }
+
+      if (result == -1)
+      {
+        #ifdef DEBUG
+        fprintf (stderr, "nxagentTransferSelection: Aborting selection notify procedure for client [%d].\n",
+                     lastClientClientPtr -> index);
+        #endif
+
+        nxagentSendSelectionNotify(None);
+
+        lastClientWindowPtr = NULL;
+        lastClientStage = SelectionStageNone;
+
+        return;
+      }
+
+      #ifdef DEBUG
+      fprintf (stderr, "nxagentTransferSelection: Setting stage to [%d] for client [%d].\n",
+                   SelectionStageWaitSize, lastClientClientPtr -> index);
+      #endif
+
+      lastClientStage = SelectionStageWaitSize;
+
+      break;
+    }
+    case SelectionStageQueryData:
+    {
+      /*
+       * Request the selection data now.
+       */
+
+      #ifdef DEBUG
+      fprintf(stderr, "nxagentTransferSelection: Getting property content from remote server.\n");
+      #endif
+
+      nxagentLastClipboardClient = NXGetCollectPropertyResource(nxagentDisplay);
+
+      if (nxagentLastClipboardClient == -1)
+      {
+        #ifdef WARNING
+        fprintf(stderr, "nxagentTransferSelection: WARNING! Asyncronous GetProperty queue full.\n");
+        #endif
+
+        result = -1;
+      }
+      else
+      {
+        result = NXCollectProperty(nxagentDisplay,
+                                   nxagentLastClipboardClient,
+                                   serverWindow,
+                                   serverCutProperty,
+                                   0,
+                                   lastClientPropertySize,
+                                   False,
+                                   AnyPropertyType);
+      }
+
+      if (result == -1)
+      {
+        #ifdef DEBUG
+        fprintf (stderr, "nxagentTransferSelection: Aborting selection notify procedure for client [%d].\n",
+                     lastClientClientPtr -> index);
+        #endif
+
+        nxagentSendSelectionNotify(None);
+
+        lastClientWindowPtr = NULL;
+        lastClientStage = SelectionStageNone;
+
+        return;
+      }
+
+      #ifdef DEBUG
+      fprintf (stderr, "nxagentTransferSelection: Setting stage to [%d] for client [%d].\n",
+                   SelectionStageWaitData, lastClientClientPtr -> index);
+      #endif
+
+      lastClientStage = SelectionStageWaitData;
+
+      break;
+    }
+    default:
+    {
+      #ifdef DEBUG
+      fprintf (stderr, "nxagentTransferSelection: WARNING! Inconsistent state [%d] for client [%d].\n",
+                   lastClientStage, lastClientClientPtr -> index);
+      #endif
+
+      break;
+    }
+  }
+}
+
+void nxagentCollectPropertyEvent(int resource)
+{
+  Atom                  atomReturnType;
+  int                   resultFormat;
+  unsigned long         ulReturnItems;
+  unsigned long         ulReturnBytesLeft;
+  unsigned char         *pszReturnData = NULL;
+  int                   result;
+
+  /*
+   * We have received the notification so
+   * we can safely retrieve data from the
+   * client structure.
+   */
+
+  result = NXGetCollectedProperty(nxagentDisplay,
+                                  resource,
+                                  &atomReturnType,
+                                  &resultFormat,
+                                  &ulReturnItems,
+                                  &ulReturnBytesLeft,
+                                  &pszReturnData);
+
+  nxagentLastClipboardClient = -1;
+
+  if (result == 0)
+  {
+    #ifdef DEBUG
+    fprintf (stderr, "nxagentCollectPropertyEvent: Failed to get reply data for client [%d].\n",
+                 lastClientClientPtr -> index);
+    #endif
+
+    nxagentSendSelectionNotify(None);
+
+    lastClientWindowPtr = NULL;
+    lastClientStage = SelectionStageNone;
+
+    if (pszReturnData != NULL)
+    {
+      XFree(pszReturnData);
+    }
+
+    return;
+  }
+ 
+  if (resultFormat != 8 && resultFormat != 16 && resultFormat != 32)
+  {
+
+    #ifdef DEBUG
+    fprintf (stderr, "nxagentCollectPropertyEvent: WARNING! Invalid property "
+                 "value.\n");
+    #endif
+
+    if (lastClientClientPtr != NULL)
+    {
+      nxagentSendSelectionNotify(None);
+    }
+
+    lastClientWindowPtr = NULL;
+    lastClientStage = SelectionStageNone;
+
+    if (pszReturnData != NULL)
+    {
+      XFree(pszReturnData);
+    }
+
+    return;
+  }
+
+  switch (lastClientStage)
+  {
+    case SelectionStageWaitSize:
+    {
+      #ifdef DEBUG
+      fprintf (stderr, "nxagentCollectPropertyEvent: Got size notify event for client [%d].\n",
+                   lastClientClientPtr -> index);
+      #endif
+
+      if (ulReturnBytesLeft == 0)
+      {
+        #ifdef DEBUG
+        fprintf (stderr, "nxagentCollectPropertyEvent: Aborting selection notify procedure for client [%d].\n",
+                     lastClientClientPtr -> index);
+        #endif
+
+        nxagentSendSelectionNotify(None);
+
+        lastClientWindowPtr = NULL;
+        lastClientStage = SelectionStageNone;
+
+        if (pszReturnData != NULL)
+        {
+          Xfree(pszReturnData);
+        }
+
+        return;
+      }
+
+      #ifdef DEBUG
+      fprintf(stderr, "nxagentCollectPropertyEvent: Got property size from remote server.\n");
+      #endif
+
+      /*
+       * Request the selection data now.
+       */
+
+      lastClientPropertySize = ulReturnBytesLeft;
+      lastClientStage = SelectionStageQueryData;
+
+      nxagentTransferSelection(resource);
+
+      break;
+    }
+    case SelectionStageWaitData:
+    {
+      #ifdef DEBUG
+      fprintf (stderr, "nxagentCollectPropertyEvent: Got data notify event for client [%d].\n",
+                   lastClientClientPtr -> index);
+      #endif
+
+      if (ulReturnBytesLeft != 0)
+      {
+        #ifdef DEBUG
+        fprintf (stderr, "nxagentCollectPropertyEvent: Aborting selection notify procedure for client [%d].\n",
+                     lastClientClientPtr -> index);
+        #endif
+
+        nxagentSendSelectionNotify(None);
+
+        lastClientWindowPtr = NULL;
+        lastClientStage = SelectionStageNone;
+
+        if (pszReturnData != NULL)
+        {
+          Xfree(pszReturnData);
+        }
+
+        return;
+      }
+
+      #ifdef DEBUG
+      fprintf(stderr, "nxagentCollectPropertyEvent: Got property content from remote server.\n");
+      #endif
+
+      ChangeWindowProperty(lastClientWindowPtr,
+                           lastClientProperty,
+                           lastClientTarget,
+                           resultFormat, PropModeReplace,
+                           ulReturnItems, pszReturnData, 1);
+
+      #ifdef DEBUG
+      fprintf(stderr, "nxagentCollectPropertyEvent: Selection property [%s] changed to [%s]\n",
+                   validateString(NameForAtom(lastClientProperty)), pszReturnData);
+      #endif
+
+      nxagentSendSelectionNotify(lastClientProperty);
+
+      /*
+       * Enable further requests from clients.
+       */
+
+      lastClientWindowPtr = NULL;
+      lastClientStage = SelectionStageNone;
+
+      break;
+    }
+    default:
+    {
+      #ifdef DEBUG
+      fprintf (stderr, "nxagentCollectPropertyEvent: WARNING! Inconsistent state [%d] for client [%d].\n",
+                   lastClientStage, lastClientClientPtr -> index);
+      #endif
+
+      break;
+    }
+  }
+
+  XFree(pszReturnData);
+  pszReturnData = NULL;
+}
+
+void nxagentNotifySelection(XEvent *X)
+{
+  int result;
+
+  XSelectionEvent eventSelection;
+
+  #ifdef DEBUG
+  fprintf(stderr, "nxagentNotifySelection: Got called.\n");
+  #endif
+
+  if (agentClipboardStatus != 1)
+  {
+    return;
+  }
+
+  #ifdef DEBUG
+  fprintf(stderr, "nxagentNotifySelection: SelectionNotify event.\n");
+  #endif
+
+  if (lastClientWindowPtr != NULL)
+  {
+    if ((lastClientStage == SelectionStageNone) && (X->xselection.property == serverCutProperty))
+    {
+      #ifdef DEBUG
+      fprintf(stderr, "nxagentNotifySelection: Starting selection transferral for client [%d].\n",
+                  lastClientClientPtr -> index);
+      #endif
+
+      /*
+       * The state machine is able to work in two phases. In the first
+       * phase we get the size of property data, in the second we get
+       * the actual data. We save a round-trip by requesting a prede-
+       * termined amount of data in a single GetProperty and by discar-
+       * ding the remaining part. This is not the optimal solution (we
+       * could get the remaining part if it doesn't fit in a single
+       * reply) but, at least with text, it should work in most situa-
+       * tions.
+       */
+
+      lastClientStage = SelectionStageQueryData;
+      lastClientPropertySize = 262144;
+
+      nxagentTransferSelection(lastClientClientPtr -> index);
+    }
+    else
+    {
+      #ifdef DEBUG
+      fprintf(stderr, "nxagentNotifySelection: WARNING! Resetting selection transferral for client [%d].\n",
+                  lastClientClientPtr -> index);
+      #endif
+
+      nxagentSendSelectionNotify(None);
+
+      lastClientWindowPtr = NULL;
+      lastClientStage = SelectionStageNone;
+    }
+
+    return;
+  }
+  else
+  {
+    int i = 0;
+
+    while ((i < nxagentMaxSelections) && (lastSelectionOwner[i].selection != X->xselection.selection))
+    {
+      i++;
+    }
+
+    if (i < nxagentMaxSelections)
+    {
+      if ((lastSelectionOwner[i].client != NULL) &&
+             (lastSelectionOwner[i].windowPtr != NULL) &&
+                 (X->xselection.property == clientCutProperty))
+      {
+        Atom            atomReturnType;
+        int             resultFormat;
+        unsigned long   ulReturnItems;
+        unsigned long   ulReturnBytesLeft;
+        unsigned char   *pszReturnData = NULL;
+
+        result = GetWindowProperty(lastSelectionOwner[i].windowPtr, clientCutProperty, 0, 0, False,
+                                       AnyPropertyType, &atomReturnType, &resultFormat,
+                                           &ulReturnItems, &ulReturnBytesLeft, &pszReturnData);
+
+        if (result == BadAlloc || result == BadAtom ||
+                result == BadMatch || result == BadValue ||
+                    result == BadWindow)
+        {
+          fprintf (stderr, "Client GetProperty failed error =");
+          lastServerProperty = None;
+          switch (result)
+          {
+            case BadAtom:
+                 fprintf (stderr, "BadAtom\n");
+                 break;
+            case BadValue:
+                 fprintf (stderr, "BadValue\n");
+                 break;
+            case BadWindow:
+                 fprintf (stderr, "BadWindow\n");
+                 break;
+          }
+        }
+        else
+        {
+          result = GetWindowProperty(lastSelectionOwner[i].windowPtr, clientCutProperty, 0,
+                                         ulReturnBytesLeft, False, AnyPropertyType, &atomReturnType,
+                                             &resultFormat, &ulReturnItems, &ulReturnBytesLeft,
+                                                 &pszReturnData);
+
+          if (result == BadAlloc || result == BadAtom ||
+                  result == BadMatch || result == BadValue ||
+                      result == BadWindow)
+          {
+            fprintf (stderr, "SelectionNotify - XChangeProperty failed\n");
+
+            lastServerProperty = None;
+          }
+          else
+          {
+            result = XChangeProperty(nxagentDisplay,
+                                     lastServerRequestor,
+                                     lastServerProperty,
+                                     lastServerTarget,
+                                     8,
+                                     PropModeReplace,
+                                     pszReturnData,
+                                     ulReturnItems);
+          }
+
+          /*
+           * if (pszReturnData)
+           * {
+           *   free(pszReturnData);
+           *   pszReturnData=NULL;
+           * }
+           */
+
+        }
+
+        eventSelection.type = SelectionNotify;
+        eventSelection.send_event = True;
+        eventSelection.display = nxagentDisplay;
+        eventSelection.requestor = lastServerRequestor;
+
+        eventSelection.selection = X->xselection.selection;
+
+        /*
+         * eventSelection.target = X->xselection.target;
+         */
+
+        eventSelection.target = lastServerTarget;
+        eventSelection.property = lastServerProperty;
+        eventSelection.time = lastServerTime;
+
+        /*
+         * eventSelection.time = CurrentTime;
+         * eventSelection.time = lastServerTime;
+         */
+
+        #ifdef DEBUG
+        fprintf(stderr, "nxagentNotifySelection: Sending event to requestor.\n");
+        #endif
+
+        result = XSendEvent(nxagentDisplay,
+                             eventSelection.requestor,
+                             False,
+                             0L,
+                             (XEvent *) &eventSelection);
+
+        if (result == BadValue || result == BadWindow)
+        {
+          fprintf (stderr, "SelectionRequest - XSendEvent failed\n");
+        }
+
+        lastServerRequestor = None; /* allow further request */
+      }
+    }
+  }
+}
+
+/*
+ * Acquire selection so we don't get selection
+ * requests from real X clients.
+ */
+
+void nxagentResetSelectionOwner()
+{
+  int i;
+
+  if (lastServerRequestor != None)
+  {
+    #ifdef TEST
+    fprintf (stderr, "nxagentResetSelectionOwner: WARNING! Requestor window [0x%lx] already found.\n",
+                 lastServerRequestor);
+    #endif
+
+    return;
+  }
+
+  /*
+   * Only for PRIMARY and CLIPBOARD selections.
+   */
+
+  for (i = 0; i < nxagentMaxSelections; i++)
+  {
+    XSetSelectionOwner(nxagentDisplay, lastSelectionOwner[i].selection, serverWindow, CurrentTime);
+
+    fprintf (stderr, "nxagentResetSelectionOwner: Reset clipboard state.\n");
+
+    lastSelectionOwner[i].client = NULL;
+    lastSelectionOwner[i].window = None;
+    lastSelectionOwner[i].windowPtr = NULL;
+    lastSelectionOwner[i].lastTimeChanged = GetTimeInMillis();
+  }
+
+  lastClientWindowPtr = NULL;
+  lastClientStage = SelectionStageNone;
+
+  lastServerRequestor = None;
+
+  return;
+}
+
+void nxagentSetSelectionOwner(Selection *pSelection)
+{
+  int i;
+  #ifdef DEBUG
+  fprintf(stderr, "nxagentSetSelectionOwner: Got called.\n");
+  #endif
+
+  if (agentClipboardStatus != 1)
+  {
+    return;
+  }
+
+  #ifdef DEBUG
+  fprintf(stderr, "nxagentSetSelectionOwner: Setting selection owner to window [0x%lx].\n",
+              serverWindow);
+  #endif
+
+  #ifdef TEST
+  if (lastServerRequestor != None)
+  {
+    fprintf (stderr, "nxagentSetSelectionOwner: WARNING! Requestor window [0x%lx] already found.\n",
+                 lastServerRequestor);
+  }
+  #endif
+
+  /*
+   * Only for PRIMARY and CLIPBOARD selections.
+   */
+
+  for (i = 0; i < nxagentMaxSelections; i++)
+  {
+    if (pSelection->selection == CurrentSelections[i].selection)
+    {
+      XSetSelectionOwner(nxagentDisplay, lastSelectionOwner[i].selection, serverWindow, CurrentTime);
+
+      lastSelectionOwner[i].client = pSelection->client;
+      lastSelectionOwner[i].window = pSelection->window;
+      lastSelectionOwner[i].windowPtr = pSelection->pWin;
+      lastSelectionOwner[i].lastTimeChanged = GetTimeInMillis();
+    }
+  }
+
+  lastClientWindowPtr = NULL;
+  lastClientStage = SelectionStageNone;
+
+  lastServerRequestor = None;
+
+/*
+FIXME
+
+   if (XGetSelectionOwner(nxagentDisplay,pSelection->selection)==serverWindow)
+   {
+      fprintf (stderr, "NXdispatch: SetSelectionOwner OK\n");
+
+      lastSelectionOwnerSelection = pSelection;
+      lastSelectionOwnerClient = pSelection->client;
+      lastSelectionOwnerWindow = pSelection->window;
+      lastSelectionOwnerWindowPtr = pSelection->pWin;
+
+      lastClientWindowPtr = NULL;
+      lastClientStage     = SelectionStageNone;
+
+      lastServerRequestor = None;
+   }
+   else fprintf (stderr, "nxagentSetSelectionOwner: SetSelectionOwner failed\n");
+*/
+}
+
+void nxagentNotifyConvertFailure(ClientPtr client, Window requestor,
+                                     Atom selection, Atom target, Time time)
+{
+  xEvent x;
+
+/*
+FIXME: Why this pointer can be not a valid
+       client pointer?
+*/
+  if (clients[client -> index] != client)
+  {
+    #ifdef WARNING
+    fprintf(stderr, "nxagentNotifyConvertFailure: WARNING! Invalid client pointer.");
+    #endif
+
+    return;
+  }
+
+  x.u.u.type = SelectionNotify;
+  x.u.selectionNotify.time = time;
+  x.u.selectionNotify.requestor = requestor;
+  x.u.selectionNotify.selection = selection;
+  x.u.selectionNotify.target = target;
+  x.u.selectionNotify.property = None;
+
+  (void) TryClientEvents(client, &x, 1, NoEventMask,
+                           NoEventMask , NullGrab);
+}
+
+int nxagentConvertSelection(ClientPtr client, WindowPtr pWin, Atom selection,
+                                Window requestor, Atom property, Atom target, Time time)
+{
+  char *strTarget;
+  int i;
+
+  if (agentClipboardStatus != 1 ||
+           nxagentOption(Clipboard) == ClipboardServer)
+  {
+    return 0;
+  }
+
+  /*
+   * There is a client owner on the agent side, let normal stuff happen.
+   */
+
+  /*
+   * Only for PRIMARY and CLIPBOARD selections.
+   */
+
+  for (i = 0; i < nxagentMaxSelections; i++)
+  {
+    if ((selection == CurrentSelections[i].selection) &&
+           (lastSelectionOwner[i].client != NULL))
+    {
+      return 0;
+    }
+  }
+
+  if (lastClientWindowPtr != NULL)
+  {
+    #ifdef TEST
+    fprintf(stderr, "nxagentConvertSelection: lastClientWindowPtr != NULL.\n");
+    #endif
+
+    if ((GetTimeInMillis() - lastClientReqTime) > 5000)
+    {
+      #ifdef DEBUG
+      fprintf(stderr, "nxagentConvertSelection: timeout expired on last request, "
+                        "notifying failure to client\n");
+      #endif
+
+      nxagentNotifyConvertFailure(lastClientClientPtr, lastClientRequestor,
+                                     lastClientSelection, lastClientTarget, lastClientTime);
+
+      lastClientWindowPtr = NULL;
+      lastClientStage = SelectionStageNone;
+    }
+    else
+    {
+      #ifdef DEBUG
+      fprintf(stderr, "nxagentConvertSelection: got request "
+                        "before timeout expired on last request, notifying failure to client\n");
+      #endif
+
+      nxagentNotifyConvertFailure(client, requestor, selection, target, time);
+
+      return 1;
+    }
+  }
+
+  #ifdef TEST
+  fprintf(stderr, "nxagentConvertSelection: client [%d] ask for sel [%s] "
+              "on window [%lx] prop [%s] target [%s].\n",
+                  client -> index, validateString(NameForAtom(selection)), requestor,
+                      validateString(NameForAtom(property)), validateString(NameForAtom(target)));
+  #endif
+
+  strTarget = NameForAtom(target);
+
+  if (strTarget == NULL)
+  {
+    return 1;
+  }
+
+  if (target == clientTARGETS)
+  {
+    Atom xa_STRING[4];
+    xEvent x;
+
+    xa_STRING[0] = XA_STRING;
+    xa_STRING[1] = clientTEXT;
+    xa_STRING[2] = clientCOMPOUND_TEXT;
+    xa_STRING[3] = clientUTF8_STRING;
+
+    ChangeWindowProperty(pWin,
+                         property,
+                         MakeAtom("ATOM", 4, 1),
+                         sizeof(Atom)*8,
+                         PropModeReplace,
+                         4,
+                         &xa_STRING, 1);
+
+    x.u.u.type = SelectionNotify;
+    x.u.selectionNotify.time = time;
+    x.u.selectionNotify.requestor = requestor;
+    x.u.selectionNotify.selection = selection;
+    x.u.selectionNotify.target = target;
+    x.u.selectionNotify.property = property;
+
+    (void) TryClientEvents(client, &x, 1, NoEventMask,
+                           NoEventMask , NullGrab);
+
+    return 1;
+  }
+
+  if (target == MakeAtom("TIMESTAMP", 9, 1))
+  {
+    xEvent x;
+    int i = 0;
+
+    while ((i < NumCurrentSelections) &&
+              CurrentSelections[i].selection != selection) i++;
+
+    if (i < NumCurrentSelections)
+    {
+      ChangeWindowProperty(pWin,
+                           property,
+                           target,
+                           32,
+                           PropModeReplace,
+                           1,
+                           (unsigned char *) &lastSelectionOwner[i].lastTimeChanged,
+                           1);
+
+      x.u.u.type = SelectionNotify;
+      x.u.selectionNotify.time = time;
+      x.u.selectionNotify.requestor = requestor;
+      x.u.selectionNotify.selection = selection;
+      x.u.selectionNotify.target = target;
+      x.u.selectionNotify.property = property;
+  
+      (void) TryClientEvents(client, &x, 1, NoEventMask,
+                             NoEventMask , NullGrab);
+  
+      return 1;
+
+    }
+  }
+
+  if (lastClientClientPtr == client && (GetTimeInMillis() - lastClientReqTime < 5000))
+  {
+    /*
+     * The same client made consecutive requests
+     * of clipboard contents with less than 5
+     * seconds time interval between them.
+     */
+
+    #ifdef DEBUG
+    fprintf(stderr, "nxagentConvertSelection: Consecutives request from client [%p] selection [%ld] "
+                "elapsed time [%lu] clientAccum [%d]\n", (void *) client, selection,
+                    GetTimeInMillis() - lastClientReqTime, clientAccum);
+    #endif
+
+    clientAccum++;
+  }
+  else
+  {
+    if (lastClientClientPtr != client)
+    {
+      clientAccum = 0;
+    }
+  }
+
+  if ((target == clientTEXT) ||
+          (target == XA_STRING) ||
+              (target == clientCOMPOUND_TEXT) ||
+                  (target == clientUTF8_STRING))
+  {
+    lastClientWindowPtr = pWin;
+    lastClientStage = SelectionStageNone;
+    lastClientRequestor = requestor;
+    lastClientClientPtr = client;
+    lastClientTime = time;
+    lastClientProperty = property;
+    lastClientSelection = selection;
+    lastClientTarget = target;
+
+    lastClientReqTime = (GetTimeInMillis() - lastClientReqTime) > 5000 ?
+                          GetTimeInMillis() : lastClientReqTime;
+
+    if (selection == MakeAtom("CLIPBOARD", 9, 0))
+    {
+      selection = lastSelectionOwner[nxagentClipboardSelection].selection;
+    }
+
+    if (target == clientUTF8_STRING)
+    {
+      XConvertSelection(nxagentDisplay, selection, serverUTF8_STRING, serverCutProperty,
+                           serverWindow, CurrentTime);
+    }
+    else
+    {
+      XConvertSelection(nxagentDisplay, selection, XA_STRING, serverCutProperty,
+                           serverWindow, CurrentTime);
+    }
+
+    #ifdef DEBUG
+    fprintf(stderr, "nxagentConvertSelection: Sent XConvertSelection with target=[%s], property [%s]\n",
+                validateString(NameForAtom(target)), validateString(NameForAtom(property)));
+    #endif
+
+    return 1;
+  }
+  else
+  {
+    xEvent x;
+
+    #ifdef DEBUG
+    fprintf(stderr, "nxagentConvertSelection: Xserver generates a SelectionNotify event "
+               "to the requestor with property None.\n");
+    #endif
+
+    x.u.u.type = SelectionNotify;
+    x.u.selectionNotify.time = time;
+    x.u.selectionNotify.requestor = requestor;
+    x.u.selectionNotify.selection = selection;
+    x.u.selectionNotify.target = target;
+    x.u.selectionNotify.property = None;
+    (void) TryClientEvents(client, &x, 1, NoEventMask, NoEventMask , NullGrab);
+    return 1;
+  }
+  return 0;
+}
+
+int nxagentSendNotify(xEvent *event)
+{
+  #ifdef DEBUG
+  fprintf(stderr, "nxagentSendNotify: Got called.\n");
+  #endif
+
+  if (agentClipboardStatus != 1)
+  {
+    return 0;
+  }
+
+  if (event->u.selectionNotify.property == clientCutProperty)
+  {
+    XSelectionEvent x;
+    int result;
+
+    /*
+     * Setup selection notify event to real server.
+     */
+
+    x.type = SelectionNotify;
+    x.send_event = True;
+    x.display = nxagentDisplay;
+    x.requestor = serverWindow;
+
+    /*
+     * On real server, the right CLIPBOARD atom is
+     * XInternAtom(nxagentDisplay, "CLIPBOARD", 1).
+     */
+
+    if (event->u.selectionNotify.selection == MakeAtom("CLIPBOARD", 9, 0))
+    {
+      x.selection = lastSelectionOwner[nxagentClipboardSelection].selection;
+    }
+    else
+    {
+      x.selection = event->u.selectionNotify.selection;
+    }
+
+    x.target = event->u.selectionNotify.target;
+    x.property = event->u.selectionNotify.property;
+    x.time = CurrentTime;
+
+    #ifdef DEBUG
+    fprintf(stderr, "nxagentSendNotify: Propagating clientCutProperty.\n");
+    #endif
+
+    result = XSendEvent (nxagentDisplay, x.requestor, False,
+                             0L, (XEvent *) &x);
+
+    if (result == BadValue || result == BadWindow)
+    {
+       fprintf (stderr, "nxagentSendNotify: XSendEvent failed.\n");
+    }
+
+    return 1;
+  }
+
+  return 0;
+}
+
+WindowPtr nxagentGetClipboardWindow(Atom property, WindowPtr pWin)
+{
+  int i = 0;
+
+  #ifdef DEBUG
+  fprintf(stderr, "nxagentGetClipboardWindow: Got called.\n");
+  #endif
+
+  while ((i < nxagentMaxSelections) &&
+            (lastSelectionOwner[i].selection != nxagentLastRequestedSelection))
+  {
+    i++;
+  }
+
+  if ((i < nxagentMaxSelections) && (property == clientCutProperty) &&
+          (lastSelectionOwner[i].windowPtr != NULL))
+  {
+    #ifdef DEBUG
+    fprintf(stderr, "nxagentGetClipboardWindow: Returning last clipboard owner window.\n");
+    #endif
+
+    return lastSelectionOwner[i].windowPtr;
+  }
+  else
+  {
+    #ifdef DEBUG
+    fprintf(stderr, "nxagentGetClipboardWindow: Returning original target window.\n");
+    #endif
+
+    return pWin;
+  }
+
+}
+
+int nxagentInitClipboard(WindowPtr pWin)
+{
+  int i;
+  Window iWindow = nxagentWindow(pWin);
+
+  #ifdef DEBUG
+  fprintf(stderr, "nxagentInitClipboard: Got called.\n");
+  #endif
+
+  if (lastSelectionOwner != NULL)
+  {
+    xfree(lastSelectionOwner);
+    lastSelectionOwner = NULL;
+  }
+
+  lastSelectionOwner = (SelectionOwner *) xalloc(2 * sizeof(SelectionOwner));
+
+  if (lastSelectionOwner == NULL)
+  {
+    FatalError("nxagentInitClipboard: Failed to allocate memory for the clipboard selections.\n");
+  }
+
+  nxagentClipboardAtom = nxagentAtoms[10];   /* CLIPBOARD */
+  nxagentTimestampAtom = nxagentAtoms[11];   /* TIMESTAMP */
+
+  lastSelectionOwner[nxagentPrimarySelection].selection = XA_PRIMARY;
+  lastSelectionOwner[nxagentPrimarySelection].client = NullClient;
+  lastSelectionOwner[nxagentPrimarySelection].window = WindowTable[0]->drawable.id;
+  lastSelectionOwner[nxagentPrimarySelection].windowPtr = NULL;
+  lastSelectionOwner[nxagentPrimarySelection].lastTimeChanged = GetTimeInMillis();
+
+  lastSelectionOwner[nxagentClipboardSelection].selection = nxagentClipboardAtom;
+  lastSelectionOwner[nxagentClipboardSelection].client = NullClient;
+  lastSelectionOwner[nxagentClipboardSelection].window = WindowTable[0]->drawable.id;
+  lastSelectionOwner[nxagentClipboardSelection].windowPtr = NULL;
+  lastSelectionOwner[nxagentClipboardSelection].lastTimeChanged = GetTimeInMillis();
+
+  #ifdef NXAGENT_TIMESTAMP
+  {
+    extern unsigned long startTime;
+
+    fprintf(stderr, "nxagentInitClipboard: Initializing start [%d] milliseconds.\n",
+            GetTimeInMillis() - startTime);
+  }
+  #endif
+
+  agentClipboardStatus = 0;
+  serverWindow = iWindow;
+
+  /*
+   * Local property to hold pasted data.
+   */
+
+  serverCutProperty = nxagentAtoms[5];  /* NX_CUT_BUFFER_SERVER */
+  serverTARGETS = nxagentAtoms[6];  /* TARGETS */
+  serverTEXT = nxagentAtoms[7];  /* TEXT */
+  serverUTF8_STRING = nxagentAtoms[12]; /* UTF8_STRING */
+
+  if (serverCutProperty == None)
+  {
+    #ifdef PANIC
+    fprintf(stderr, "nxagentInitClipboard: PANIC! Could not create NX_CUT_BUFFER_SERVER atom\n");
+    #endif
+
+    return -1;
+  }
+
+  #ifdef TEST
+  fprintf(stderr, "nxagentInitClipboard: Setting owner of selection [%s][%d] on window 0x%lx\n",
+              "NX_CUT_BUFFER_SERVER", (int) serverCutProperty, iWindow);
+  #endif
+
+  XSetSelectionOwner(nxagentDisplay, serverCutProperty, iWindow, CurrentTime);
+
+  if (XQueryExtension(nxagentDisplay,
+                      "XFIXES",
+                      &nxagentXFixesInfo.Opcode,
+                      &nxagentXFixesInfo.EventBase,
+                      &nxagentXFixesInfo.ErrorBase) == 0)
+  {
+    ErrorF("Unable to initialize XFixes extension.\n");
+  }
+
+  else
+  {
+    #ifdef TEST
+    fprintf(stderr, "nxagentInitClipboard: Registering for XFixesSelectionNotify events.\n");
+    #endif
+
+    XFixesSelectSelectionInput(nxagentDisplay, iWindow, nxagentClipboardAtom,
+                               XFixesSetSelectionOwnerNotifyMask |
+                               XFixesSelectionWindowDestroyNotifyMask |
+                               XFixesSelectionClientCloseNotifyMask);
+
+    nxagentXFixesInfo.Initialized = 1;
+  }
+
+  if (nxagentSessionId[0])
+  {
+    #ifdef TEST
+    fprintf(stderr, "nxagentInitClipboard: setting the ownership of %s to %lx"
+                " and registering for PropertyChangeMask events\n",
+                    validateString(XGetAtomName(nxagentDisplay, nxagentAtoms[10])), iWindow);
+    #endif
+
+    XSetSelectionOwner(nxagentDisplay, nxagentAtoms[10], iWindow, CurrentTime);
+    pWin -> eventMask |= PropertyChangeMask;
+    nxagentChangeWindowAttributes(pWin, CWEventMask);
+  }
+
+  if (nxagentReconnectTrap)
+  {
+    /*
+     * Only for PRIMARY and CLIPBOARD selections.
+     */
+
+    for (i = 0; i < nxagentMaxSelections; i++)
+    {
+      if (lastSelectionOwner[i].client && lastSelectionOwner[i].window)
+      {
+        XSetSelectionOwner(nxagentDisplay, lastSelectionOwner[i].selection, iWindow, CurrentTime);
+      }
+    }
+  }
+  else
+  {
+    lastSelectionOwner[nxagentPrimarySelection].client = NULL;
+    lastSelectionOwner[nxagentClipboardSelection].client = NULL;
+
+    lastServerRequestor = None;
+
+    lastClientWindowPtr = NULL;
+    lastClientStage = SelectionStageNone;
+    lastClientReqTime = GetTimeInMillis();
+
+    clientCutProperty = MakeAtom(szAgentNX_CUT_BUFFER_CLIENT,
+                                         strlen(szAgentNX_CUT_BUFFER_CLIENT), 1);
+    clientTARGETS = MakeAtom(szAgentTARGETS, strlen(szAgentTARGETS), True);
+    clientTEXT = MakeAtom(szAgentTEXT, strlen(szAgentTEXT), True);
+    clientCOMPOUND_TEXT = MakeAtom(szAgentCOMPOUND_TEXT, strlen(szAgentCOMPOUND_TEXT), True);
+    clientUTF8_STRING = MakeAtom(szAgentUTF8_STRING, strlen(szAgentUTF8_STRING), True);
+
+    if (clientCutProperty == None)
+    {
+      #ifdef PANIC
+      fprintf(stderr, "nxagentInitClipboard: PANIC! "
+                  "Could not create NX_CUT_BUFFER_CLIENT atom.\n");
+      #endif
+
+      return -1;
+    }
+  }
+
+  agentClipboardStatus = 1;
+
+  #ifdef DEBUG
+  fprintf(stderr, "nxagentInitClipboard: Clipboard initialization completed.\n");
+  #endif
+
+  #ifdef NXAGENT_TIMESTAMP
+  {
+    extern unsigned long startTime;
+
+    fprintf(stderr, "nxagentInitClipboard: initializing ends [%d] milliseconds.\n",
+                GetTimeInMillis() - startTime);
+  }
+  #endif
+
+  return 1;
+}
+