Added libXt library

1 files changed, 2295 insertions, 0 deletions

diff --git a/libXt/src/Selection.c b/libXt/src/Selection.c
new file mode 100644
index 000000000..aea4914a6
--- /dev/null
+++ b/libXt/src/Selection.c
@@ -0,0 +1,2295 @@
+/* $Xorg: Selection.c,v 1.4 2001/02/09 02:03:56 xorgcvs Exp $ */
+
+/***********************************************************
+Copyright 1987, 1988 by Digital Equipment Corporation, Maynard, Massachusetts,
+Copyright 1993 by Sun Microsystems, Inc. Mountain View, CA.
+
+                        All Rights Reserved
+
+Permission to use, copy, modify, and distribute this software and its
+documentation for any purpose and without fee is hereby granted,
+provided that the above copyright notice appear in all copies and that
+both that copyright notice and this permission notice appear in
+supporting documentation, and that the names of Digital or Sun not be
+used in advertising or publicity pertaining to distribution of the
+software without specific, written prior permission.
+
+DIGITAL DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING
+ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL
+DIGITAL BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR
+ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
+WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION,
+ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
+SOFTWARE.
+
+SUN DISCLAIMS ALL WARRANTIES WITH REGARD TO  THIS  SOFTWARE,
+INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FIT-
+NESS FOR A PARTICULAR PURPOSE. IN NO EVENT SHALL SUN BE  LI-
+ABLE  FOR  ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR
+ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,  DATA  OR
+PROFITS,  WHETHER  IN  AN  ACTION OF CONTRACT, NEGLIGENCE OR
+OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION  WITH
+THE USE OR PERFORMANCE OF THIS SOFTWARE.
+
+******************************************************************/
+
+/*
+
+Copyright 1987, 1988, 1994, 1998  The Open Group
+
+Permission to use, copy, modify, distribute, and sell this software and its
+documentation for any purpose is hereby granted without fee, provided that
+the above copyright notice appear in all copies and that both that
+copyright notice and this permission notice appear in supporting
+documentation.
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL THE
+OPEN GROUP BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
+AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+
+Except as contained in this notice, the name of The Open Group shall not be
+used in advertising or otherwise to promote the sale, use or other dealings
+in this Software without prior written authorization from The Open Group.
+
+*/
+/* $XFree86: xc/lib/Xt/Selection.c,v 3.9 2001/12/14 19:56:29 dawes Exp $ */
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+#include "IntrinsicI.h"
+#include "StringDefs.h"
+#include "SelectionI.h"
+#include <X11/Xatom.h>
+#include <stdio.h>
+
+void _XtSetDefaultSelectionTimeout(
+	unsigned long *timeout)
+{
+	*timeout = 5000; /* default to 5 seconds */
+}
+
+void XtSetSelectionTimeout(
+	unsigned long timeout)
+{
+	XtAppSetSelectionTimeout(_XtDefaultAppContext(), timeout);
+}
+
+void XtAppSetSelectionTimeout(
+	XtAppContext app,
+	unsigned long timeout)
+{
+	LOCK_APP(app);
+	app->selectionTimeout = timeout;
+	UNLOCK_APP(app);
+}
+
+unsigned long XtGetSelectionTimeout(void)
+{
+	return XtAppGetSelectionTimeout(_XtDefaultAppContext());
+}
+
+unsigned long XtAppGetSelectionTimeout(
+	XtAppContext app)
+{
+	unsigned long retval;
+
+	LOCK_APP(app);
+	retval = app->selectionTimeout;
+	UNLOCK_APP(app);
+	return retval;
+}
+
+
+/* General utilities */
+
+static void HandleSelectionReplies(Widget, XtPointer, XEvent *, Boolean *);
+static void ReqTimedOut(XtPointer, XtIntervalId *);
+static void HandlePropertyGone(Widget, XtPointer, XEvent *, Boolean *);
+static void HandleGetIncrement(Widget, XtPointer, XEvent *, Boolean *);
+static void HandleIncremental(Display *, Widget, Atom, CallBackInfo, unsigned long);
+
+static XContext selectPropertyContext = 0;
+static XContext paramPropertyContext = 0;
+static XContext multipleContext = 0;
+
+/* Multiple utilities */
+static void AddSelectionRequests(Widget, Atom, int, Atom *, XtSelectionCallbackProc *, int, XtPointer *, Boolean *, Atom *);
+static Boolean IsGatheringRequest(Widget, Atom);
+
+#define PREALLOCED 32
+
+/* Parameter utilities */
+static void AddParamInfo(Widget, Atom, Atom);
+static void RemoveParamInfo(Widget, Atom);
+static Atom GetParamInfo(Widget, Atom);
+
+static int StorageSize[3] = {1, sizeof(short), sizeof(long)};
+#define BYTELENGTH(length, format) ((length) * StorageSize[(format)>>4])
+#define NUMELEM(bytelength, format) ((bytelength) / StorageSize[(format)>>4])
+
+/* Xlib and Xt are permitted to have different memory allocators, and in the
+ * XtSelectionCallbackProc the client is instructed to free the selection
+ * value with XtFree, so the selection value received from XGetWindowProperty
+ * should be copied to memory allocated through Xt.  But copying is
+ * undesirable since the selection value may be large, and, under normal
+ * library configuration copying is unnecessary.
+ */
+#ifdef XTTRACEMEMORY
+#define XT_COPY_SELECTION	1
+#endif
+
+/*ARGSUSED*/
+static void FreePropList(
+ Widget w,			/* unused */
+ XtPointer closure,
+ XtPointer callData)		/* unused */
+{
+    PropList sarray = (PropList)closure;
+    LOCK_PROCESS;
+    XDeleteContext(sarray->dpy, DefaultRootWindow(sarray->dpy),
+		   selectPropertyContext);
+    UNLOCK_PROCESS;
+    XtFree((char*)sarray->list);
+    XtFree((char*)closure);
+}
+
+
+static PropList GetPropList(
+    Display *dpy)
+{
+    PropList sarray;
+    Atom atoms[4];
+    static char* names[] = {
+	"INCR",
+	"MULTIPLE",
+	"TIMESTAMP",
+	"_XT_SELECTION_0" };
+
+    LOCK_PROCESS;
+    if (selectPropertyContext == 0)
+	selectPropertyContext = XUniqueContext();
+    if (XFindContext(dpy, DefaultRootWindow(dpy), selectPropertyContext,
+		     (XPointer *)&sarray)) {
+	XtPerDisplay pd = _XtGetPerDisplay(dpy);
+	sarray = (PropList) __XtMalloc((unsigned) sizeof(PropListRec));
+	sarray->dpy = dpy;
+	XInternAtoms(dpy, names, 4, FALSE, atoms);
+	sarray->incr_atom = atoms[0];
+	sarray->indirect_atom = atoms[1];
+	sarray->timestamp_atom = atoms[2];
+	sarray->propCount = 1;
+	sarray->list =
+	    (SelectionProp)__XtMalloc((unsigned) sizeof(SelectionPropRec));
+	sarray->list[0].prop = atoms[3];
+	sarray->list[0].avail = TRUE;
+	(void) XSaveContext(dpy, DefaultRootWindow(dpy), selectPropertyContext,
+			    (char *) sarray);
+	_XtAddCallback( &pd->destroy_callbacks,
+			FreePropList, (XtPointer)sarray );
+    }
+    UNLOCK_PROCESS;
+    return sarray;
+}
+
+
+static Atom GetSelectionProperty(
+    Display *dpy)
+{
+ SelectionProp p;
+ int propCount;
+ char propname[80];
+ PropList sarray = GetPropList(dpy);
+
+ for (p = sarray->list, propCount=sarray->propCount;
+	propCount;
+	p++, propCount--) {
+   if (p->avail) {
+      p->avail = FALSE;
+      return(p->prop);
+   }
+ }
+ propCount = sarray->propCount++;
+ sarray->list = (SelectionProp) XtRealloc((XtPointer)sarray->list,
+  		(unsigned)(sarray->propCount*sizeof(SelectionPropRec)));
+ (void) sprintf(propname, "%s%d", "_XT_SELECTION_", propCount);
+ sarray->list[propCount].prop = XInternAtom(dpy, propname, FALSE);
+ sarray->list[propCount].avail = FALSE;
+ return(sarray->list[propCount].prop);
+}
+
+static void FreeSelectionProperty(
+    Display *dpy,
+    Atom prop)
+{
+ SelectionProp p;
+ PropList sarray;
+ if (prop == None) return;
+ LOCK_PROCESS;
+ if (XFindContext(dpy, DefaultRootWindow(dpy), selectPropertyContext,
+		  (XPointer *)&sarray))
+    XtAppErrorMsg(XtDisplayToApplicationContext(dpy),
+	    "noSelectionProperties", "freeSelectionProperty", XtCXtToolkitError,
+		"internal error: no selection property context for display",
+		 (String *)NULL,  (Cardinal *)NULL );
+ UNLOCK_PROCESS;
+ for (p = sarray->list; p; p++)
+   if (p->prop == prop) {
+      p->avail = TRUE;
+      return;
+      }
+}
+
+static void FreeInfo(
+    CallBackInfo info)
+{
+    XtFree((char*)info->incremental);
+    XtFree((char*)info->callbacks);
+    XtFree((char*)info->req_closure);
+    XtFree((char*)info->target);
+    XtFree((char*)info);
+}
+
+static CallBackInfo MakeInfo(
+    Select ctx,
+    XtSelectionCallbackProc *callbacks,
+    XtPointer *closures,
+    int count,
+    Widget widget,
+    Time time,
+    Boolean *incremental,
+    Atom *properties)
+{
+    	CallBackInfo info = XtNew(CallBackInfoRec);
+
+	info->ctx = ctx;
+	info->callbacks = (XtSelectionCallbackProc *)
+	    __XtMalloc((unsigned) (count * sizeof(XtSelectionCallbackProc)));
+	(void) memmove((char*)info->callbacks, (char*)callbacks,
+		       count * sizeof(XtSelectionCallbackProc));
+	info->req_closure =
+	    (XtPointer*)__XtMalloc((unsigned) (count * sizeof(XtPointer)));
+	(void) memmove((char*)info->req_closure, (char*)closures,
+		       count * sizeof(XtPointer));
+	if (count == 1 && properties != NULL && properties[0] != None)
+	    info->property = properties[0];
+	else {
+	    info->property = GetSelectionProperty(XtDisplay(widget));
+	    XDeleteProperty(XtDisplay(widget), XtWindow(widget),
+			    info->property);
+	}
+	info->proc = HandleSelectionReplies;
+	info->widget = widget;
+	info->time = time;
+	info->incremental = (Boolean*) __XtMalloc(count * sizeof(Boolean));
+	(void) memmove((char*)info->incremental, (char*) incremental,
+		       count * sizeof(Boolean));
+	info->current = 0;
+	info->value = NULL;
+	return (info);
+}
+
+static void RequestSelectionValue(
+    CallBackInfo info,
+    Atom selection,
+    Atom target)
+{
+#ifndef DEBUG_WO_TIMERS
+    XtAppContext app = XtWidgetToApplicationContext(info->widget);
+	info->timeout = XtAppAddTimeOut(app,
+			 app->selectionTimeout, ReqTimedOut, (XtPointer)info);
+#endif
+	XtAddEventHandler(info->widget, (EventMask)0, TRUE,
+			  HandleSelectionReplies, (XtPointer)info);
+	XConvertSelection(info->ctx->dpy, selection, target,
+			  info->property, XtWindow(info->widget), info->time);
+}
+
+
+static XContext selectContext = 0;
+
+static Select NewContext(
+    Display *dpy,
+    Atom selection)
+{
+    /* assert(selectContext != 0) */
+    Select ctx = XtNew(SelectRec);
+    ctx->dpy = dpy;
+    ctx->selection = selection;
+    ctx->widget = NULL;
+    ctx->prop_list = GetPropList(dpy);
+    ctx->ref_count = 0;
+    ctx->free_when_done = FALSE;
+    ctx->was_disowned = FALSE;
+    LOCK_PROCESS;
+    (void)XSaveContext(dpy, (Window)selection, selectContext, (char *)ctx);
+    UNLOCK_PROCESS;
+    return ctx;
+}
+
+static Select FindCtx(
+    Display *dpy,
+    Atom selection)
+{
+    Select ctx;
+
+    LOCK_PROCESS;
+    if (selectContext == 0)
+	selectContext = XUniqueContext();
+    if (XFindContext(dpy, (Window)selection, selectContext, (XPointer *)&ctx))
+	ctx = NewContext(dpy, selection);
+    UNLOCK_PROCESS;
+    return ctx;
+}
+
+/*ARGSUSED*/
+static void WidgetDestroyed(
+    Widget widget,
+    XtPointer closure, XtPointer data)
+{
+    Select ctx = (Select) closure;
+    if (ctx->widget == widget) {
+	if (ctx->free_when_done)
+	    XtFree((char*)ctx);
+	else
+	    ctx->widget = NULL;
+    }
+}
+
+/* Selection Owner code */
+
+static void HandleSelectionEvents(Widget, XtPointer, XEvent *, Boolean *);
+
+static Boolean LoseSelection(
+    Select ctx,
+    Widget widget,
+    Atom selection,
+    Time time)
+{
+    if ((ctx->widget == widget) &&
+	(ctx->selection == selection) && /* paranoia */
+	!ctx->was_disowned &&
+	((time == CurrentTime) || (time >= ctx->time)))
+    {
+	XtRemoveEventHandler(widget, (EventMask)0, TRUE,
+			     HandleSelectionEvents, (XtPointer)ctx);
+	XtRemoveCallback(widget, XtNdestroyCallback,
+			 WidgetDestroyed, (XtPointer)ctx);
+	ctx->was_disowned = TRUE; /* widget officially loses ownership */
+	/* now inform widget */
+	if (ctx->loses) {
+	    if (ctx->incremental)
+	       (*(XtLoseSelectionIncrProc)ctx->loses)
+		   (widget, &ctx->selection, ctx->owner_closure);
+	    else  (*ctx->loses)(widget, &ctx->selection);
+	}
+	return(TRUE);
+    }
+    else return(FALSE);
+}
+
+static XContext selectWindowContext = 0;
+
+/* %%% Xlib.h should make this public! */
+typedef int (*xErrorHandler)(Display*, XErrorEvent*);
+
+static xErrorHandler oldErrorHandler = NULL;
+static unsigned long firstProtectRequest;
+static Window errorWindow;
+
+static int LocalErrorHandler (
+    Display *dpy,
+    XErrorEvent *error)
+{
+    int retval;
+
+    /* If BadWindow error on selection requestor, nothing to do but let
+     * the transfer timeout.  Otherwise, invoke saved error handler. */
+
+    LOCK_PROCESS;
+
+    if (error->error_code == BadWindow && error->resourceid == errorWindow &&
+	error->serial >= firstProtectRequest) {
+	UNLOCK_PROCESS;
+	return 0;
+    }
+
+    if (oldErrorHandler == NULL) {
+	UNLOCK_PROCESS;
+	return 0;  /* should never happen */
+    }
+
+    retval = (*oldErrorHandler)(dpy, error);
+    UNLOCK_PROCESS;
+    return retval;
+}
+
+static void StartProtectedSection(
+    Display *dpy,
+    Window window)
+{
+    /* protect ourselves against request window being destroyed
+     * before completion of transfer */
+
+    LOCK_PROCESS;
+    oldErrorHandler = XSetErrorHandler(LocalErrorHandler);
+    firstProtectRequest = NextRequest(dpy);
+    errorWindow = window;
+    UNLOCK_PROCESS;
+}
+
+static void EndProtectedSection(
+    Display *dpy)
+{
+    /* flush any generated errors on requestor and
+     * restore original error handler */
+
+    XSync(dpy, False);
+
+    LOCK_PROCESS;
+    XSetErrorHandler(oldErrorHandler);
+    oldErrorHandler = NULL;
+    UNLOCK_PROCESS;
+}
+
+static void AddHandler(
+    Request req,
+    EventMask mask,
+    XtEventHandler proc,
+    XtPointer closure)
+{
+    Display *dpy = req->ctx->dpy;
+    Window window = req->requestor;
+    Widget widget = XtWindowToWidget(dpy, window);
+
+    if (widget != NULL) req->widget = widget;
+    else widget = req->widget;
+
+    if (XtWindow(widget) == window)
+	XtAddEventHandler(widget, mask, False, proc, closure);
+    else {
+	RequestWindowRec *requestWindowRec;
+	LOCK_PROCESS;
+	if (selectWindowContext == 0)
+	    selectWindowContext = XUniqueContext();
+	if (XFindContext(dpy, window, selectWindowContext,
+			 (XPointer *)&requestWindowRec)) {
+	    requestWindowRec = XtNew(RequestWindowRec);
+	    requestWindowRec->active_transfer_count = 0;
+	    (void)XSaveContext(dpy, window, selectWindowContext,
+			       (char *)requestWindowRec);
+	}
+	UNLOCK_PROCESS;
+	if (requestWindowRec->active_transfer_count++ == 0) {
+	    XtRegisterDrawable(dpy, window, widget);
+	    XSelectInput(dpy, window, mask);
+	}
+	XtAddRawEventHandler(widget, mask, FALSE, proc, closure);
+    }
+}
+
+static void RemoveHandler(
+    Request req,
+    EventMask mask,
+    XtEventHandler proc,
+    XtPointer closure)
+{
+    Display *dpy = req->ctx->dpy;
+    Window window = req->requestor;
+    Widget widget = req->widget;
+
+    if ((XtWindowToWidget(dpy, window) == widget) &&
+        (XtWindow(widget) != window)) {
+	/* we had to hang this window onto our widget; take it off */
+	RequestWindowRec* requestWindowRec;
+	XtRemoveRawEventHandler(widget, mask, TRUE, proc, closure);
+	LOCK_PROCESS;
+	(void)XFindContext(dpy, window, selectWindowContext,
+			   (XPointer *)&requestWindowRec);
+	UNLOCK_PROCESS;
+	if (--requestWindowRec->active_transfer_count == 0) {
+	    XtUnregisterDrawable(dpy, window);
+	    StartProtectedSection(dpy, window);
+	    XSelectInput(dpy, window, 0L);
+	    EndProtectedSection(dpy);
+	    LOCK_PROCESS;
+	    (void)XDeleteContext(dpy, window, selectWindowContext);
+	    UNLOCK_PROCESS;
+	    XtFree((char*)requestWindowRec);
+	}
+    } else {
+        XtRemoveEventHandler(widget, mask, TRUE,  proc, closure);
+    }
+}
+
+/* ARGSUSED */
+static void OwnerTimedOut(
+    XtPointer closure,
+    XtIntervalId   *id)
+{
+    Request req = (Request)closure;
+    Select ctx = req->ctx;
+
+    if (ctx->incremental && (ctx->owner_cancel != NULL)) {
+	(*ctx->owner_cancel)(ctx->widget, &ctx->selection,
+			     &req->target, (XtRequestId*)&req,
+			     ctx->owner_closure);
+    } else {
+	if (ctx->notify == NULL)
+	    XtFree((char*)req->value);
+	else {
+	    /* the requestor hasn't deleted the property, but
+	     * the owner needs to free the value.
+	     */
+	    if (ctx->incremental)
+		(*(XtSelectionDoneIncrProc)ctx->notify)
+			      (ctx->widget, &ctx->selection, &req->target,
+			       (XtRequestId*)&req, ctx->owner_closure);
+	    else
+		(*ctx->notify)(ctx->widget, &ctx->selection, &req->target);
+	}
+    }
+
+    RemoveHandler(req, (EventMask)PropertyChangeMask,
+		  HandlePropertyGone, closure);
+    XtFree((char*)req);
+    if (--ctx->ref_count == 0 && ctx->free_when_done)
+	XtFree((char*)ctx);
+}
+
+static void SendIncrement(
+    Request incr)
+{
+    Display *dpy = incr->ctx->dpy;
+
+    unsigned long incrSize = MAX_SELECTION_INCR(dpy);
+    if (incrSize > incr->bytelength - incr->offset)
+        incrSize = incr->bytelength - incr->offset;
+    StartProtectedSection(dpy, incr->requestor);
+    XChangeProperty(dpy, incr->requestor, incr->property,
+    	    incr->type, incr->format, PropModeReplace,
+	    (unsigned char *)incr->value + incr->offset,
+	    NUMELEM((int)incrSize, incr->format));
+    EndProtectedSection(dpy);
+    incr->offset += incrSize;
+}
+
+static void AllSent(
+    Request req)
+{
+    Select ctx = req->ctx;
+    StartProtectedSection(ctx->dpy, req->requestor);
+    XChangeProperty(ctx->dpy, req->requestor,
+		    req->property, req->type,  req->format,
+		    PropModeReplace, (unsigned char *) NULL, 0);
+    EndProtectedSection(ctx->dpy);
+    req->allSent = TRUE;
+
+    if (ctx->notify == NULL) XtFree((char*)req->value);
+}
+
+/*ARGSUSED*/
+static void HandlePropertyGone(
+    Widget widget,
+    XtPointer closure,
+    XEvent *ev,
+    Boolean *cont)
+{
+    XPropertyEvent *event = (XPropertyEvent *) ev;
+    Request req = (Request)closure;
+    Select ctx = req->ctx;
+
+    if ((event->type != PropertyNotify) ||
+        (event->state != PropertyDelete) ||
+	(event->atom != req->property) ||
+	(event->window != req->requestor))
+      return;
+#ifndef DEBUG_WO_TIMERS
+    XtRemoveTimeOut(req->timeout);
+#endif
+    if (req->allSent) {
+	if (ctx->notify) {
+	    if (ctx->incremental) {
+		(*(XtSelectionDoneIncrProc)ctx->notify)
+			      (ctx->widget, &ctx->selection, &req->target,
+			       (XtRequestId*)&req, ctx->owner_closure);
+	    }
+	    else (*ctx->notify)(ctx->widget, &ctx->selection, &req->target);
+	}
+	RemoveHandler(req, (EventMask)PropertyChangeMask,
+		      HandlePropertyGone, closure);
+	XtFree((char*)req);
+	if (--ctx->ref_count == 0 && ctx->free_when_done)
+	    XtFree((char*)ctx);
+    } else  { /* is this part of an incremental transfer? */
+	if (ctx->incremental) {
+	     if (req->bytelength == 0)
+		AllSent(req);
+	     else {
+		unsigned long size = MAX_SELECTION_INCR(ctx->dpy);
+    		SendIncrement(req);
+		(*(XtConvertSelectionIncrProc)ctx->convert)
+			   (ctx->widget, &ctx->selection, &req->target,
+			    &req->type, &req->value,
+			    &req->bytelength, &req->format,
+			    &size, ctx->owner_closure, (XtPointer*)&req);
+		if (req->bytelength)
+		    req->bytelength = BYTELENGTH(req->bytelength, req->format);
+		req->offset = 0;
+	    }
+	} else {
+	    if (req->offset < req->bytelength)
+		SendIncrement(req);
+	    else AllSent(req);
+	}
+#ifndef DEBUG_WO_TIMERS
+	{
+	  XtAppContext app = XtWidgetToApplicationContext(req->widget);
+	  req->timeout = XtAppAddTimeOut(app,
+			 app->selectionTimeout, OwnerTimedOut, (XtPointer)req);
+	}
+#endif
+    }
+}
+
+static void PrepareIncremental(
+    Request req,
+    Widget widget,
+    Window window,
+    Atom property,
+    Atom target,
+    Atom targetType,
+    XtPointer value,
+    unsigned long length,
+    int format)
+{
+	req->type = targetType;
+	req->value = value;
+	req->bytelength = BYTELENGTH(length,format);
+	req->format = format;
+	req->offset = 0;
+	req->target = target;
+	req->widget = widget;
+	req->allSent = FALSE;
+#ifndef DEBUG_WO_TIMERS
+	{
+	XtAppContext app = XtWidgetToApplicationContext(widget);
+	req->timeout = XtAppAddTimeOut(app,
+			 app->selectionTimeout, OwnerTimedOut, (XtPointer)req);
+	}
+#endif
+	AddHandler(req, (EventMask)PropertyChangeMask,
+		   HandlePropertyGone, (XtPointer)req);
+/* now send client INCR property */
+	XChangeProperty(req->ctx->dpy, window, req->property,
+			req->ctx->prop_list->incr_atom,
+			32, PropModeReplace,
+			(unsigned char *)&req->bytelength, 1);
+}
+
+static Boolean GetConversion(
+    Select ctx,			/* logical owner */
+    XSelectionRequestEvent* event,
+    Atom target,
+    Atom property,		/* requestor's property */
+    Widget widget)		/* physical owner (receives events) */
+{
+    XtPointer value = NULL;
+    unsigned long length;
+    int format;
+    Atom targetType;
+    Request req = XtNew(RequestRec);
+    Boolean timestamp_target = (target == ctx->prop_list->timestamp_atom);
+
+    req->ctx = ctx;
+    req->event = *event;
+    req->property = property;
+    req->requestor = event->requestor;
+
+    if (timestamp_target) {
+	value = __XtMalloc(sizeof(long));
+	*(long*)value = ctx->time;
+	targetType = XA_INTEGER;
+	length = 1;
+	format = 32;
+    }
+    else {
+	ctx->ref_count++;
+	if (ctx->incremental == TRUE) {
+	     unsigned long size = MAX_SELECTION_INCR(ctx->dpy);
+	     if ((*(XtConvertSelectionIncrProc)ctx->convert)
+			       (ctx->widget, &event->selection, &target,
+				&targetType, &value, &length, &format,
+				&size, ctx->owner_closure, (XtRequestId*)&req)
+		     == FALSE) {
+		 XtFree((char*)req);
+		 ctx->ref_count--;
+		 return(FALSE);
+	     }
+	     StartProtectedSection(ctx->dpy, event->requestor);
+	     PrepareIncremental(req, widget, event->requestor, property,
+				target, targetType, value, length, format);
+	     return(TRUE);
+	}
+	ctx->req = req;
+	if ((*ctx->convert)(ctx->widget, &event->selection, &target,
+			    &targetType, &value, &length, &format) == FALSE) {
+	    XtFree((char*)req);
+	    ctx->req = NULL;
+	    ctx->ref_count--;
+	    return(FALSE);
+	}
+	ctx->req = NULL;
+    }
+    StartProtectedSection(ctx->dpy, event->requestor);
+    if (BYTELENGTH(length,format) <= (unsigned long) MAX_SELECTION_INCR(ctx->dpy)) {
+	if (! timestamp_target) {
+	    if (ctx->notify != NULL) {
+		  req->target = target;
+		  req->widget = widget;
+		  req->allSent = TRUE;
+#ifndef DEBUG_WO_TIMERS
+		  {
+		  XtAppContext app = XtWidgetToApplicationContext(req->widget);
+		  req->timeout = XtAppAddTimeOut(app,
+			 app->selectionTimeout, OwnerTimedOut, (XtPointer)req);
+		  }
+#endif
+	          AddHandler(req, (EventMask)PropertyChangeMask,
+			     HandlePropertyGone, (XtPointer)req);
+	      }
+	      else ctx->ref_count--;
+        }
+	XChangeProperty(ctx->dpy, event->requestor, property,
+			targetType, format, PropModeReplace,
+			(unsigned char *)value, (int)length);
+	/* free storage for client if no notify proc */
+	if (timestamp_target || ctx->notify == NULL) {
+	    XtFree((char*)value);
+	    XtFree((char*)req);
+	}
+    } else {
+	 PrepareIncremental(req, widget, event->requestor, property,
+			    target, targetType, value, length, format);
+    }
+    return(TRUE);
+}
+
+/*ARGSUSED*/
+static void HandleSelectionEvents(
+    Widget widget,
+    XtPointer closure,
+    XEvent *event,
+    Boolean *cont)
+{
+    Select ctx;
+    XSelectionEvent ev;
+    Atom target;
+    int count;
+    Boolean writeback = FALSE;
+
+    ctx = (Select) closure;
+    switch (event->type) {
+      case SelectionClear:
+	/* if this event is not for the selection we registered for,
+	 * don't do anything */
+	if (ctx->selection != event->xselectionclear.selection ||
+	    ctx->serial > event->xselectionclear.serial)
+	    break;
+	(void) LoseSelection(ctx, widget, event->xselectionclear.selection,
+			event->xselectionclear.time);
+	break;
+      case SelectionRequest:
+	/* if this event is not for the selection we registered for,
+	 * don't do anything */
+	if (ctx->selection != event->xselectionrequest.selection)
+	    break;
+	ev.type = SelectionNotify;
+	ev.display = event->xselectionrequest.display;
+	ev.requestor = event->xselectionrequest.requestor;
+	ev.selection = event->xselectionrequest.selection;
+	ev.time = event->xselectionrequest.time;
+	ev.target = event->xselectionrequest.target;
+	if (event->xselectionrequest.property == None) /* obsolete requestor */
+	   event->xselectionrequest.property = event->xselectionrequest.target;
+	if (ctx->widget != widget || ctx->was_disowned
+	   || ((event->xselectionrequest.time != CurrentTime)
+	        && (event->xselectionrequest.time < ctx->time)))
+	    ev.property = None;
+         else {
+	   if (ev.target == ctx->prop_list->indirect_atom) {
+	      IndirectPair *p;
+	      int format;
+	      unsigned long bytesafter, length;
+	      unsigned char *value;
+	      ev.property = event->xselectionrequest.property;
+	      StartProtectedSection(ev.display, ev.requestor);
+	      (void) XGetWindowProperty(ev.display, ev.requestor,
+			event->xselectionrequest.property, 0L, 1000000,
+			False,(Atom)AnyPropertyType, &target, &format, &length,
+			&bytesafter, &value);
+	      count = BYTELENGTH(length, format) / sizeof(IndirectPair);
+	      for (p = (IndirectPair *)value; count; p++, count--) {
+		  EndProtectedSection(ctx->dpy);
+		  if (!GetConversion(ctx, (XSelectionRequestEvent*)event,
+				     p->target, p->property, widget)) {
+
+			p->target = None;
+			writeback = TRUE;
+			StartProtectedSection(ctx->dpy, ev.requestor);
+		  }
+	      }
+	      if (writeback)
+		XChangeProperty(ev.display, ev.requestor,
+			event->xselectionrequest.property, target,
+			format, PropModeReplace, value, (int)length);
+	      XFree((char *)value);
+	  } else /* not multiple */ {
+	       if (GetConversion(ctx, (XSelectionRequestEvent*)event,
+				 event->xselectionrequest.target,
+				 event->xselectionrequest.property,
+				 widget))
+		   ev.property = event->xselectionrequest.property;
+	       else {
+		   ev.property = None;
+		   StartProtectedSection(ctx->dpy, ev.requestor);
+	       }
+	   }
+      }
+      (void) XSendEvent(ctx->dpy, ev.requestor, False, (unsigned long)NULL,
+		   (XEvent *) &ev);
+
+      EndProtectedSection(ctx->dpy);
+
+      break;
+    }
+}
+
+static Boolean OwnSelection(
+    Widget widget,
+    Atom selection,
+    Time time,
+    XtConvertSelectionProc convert,
+    XtLoseSelectionProc lose,
+    XtSelectionDoneProc notify,
+    XtCancelConvertSelectionProc cancel,
+    XtPointer closure,
+    Boolean incremental)
+{
+    Select ctx;
+    Select oldctx = NULL;
+
+    if (!XtIsRealized(widget)) return False;
+
+    ctx = FindCtx(XtDisplay(widget), selection);
+    if (ctx->widget != widget || ctx->time != time ||
+	ctx->ref_count || ctx->was_disowned)
+    {
+	Boolean replacement = FALSE;
+	Window window = XtWindow(widget);
+	unsigned long serial = XNextRequest(ctx->dpy);
+        XSetSelectionOwner(ctx->dpy, selection, window, time);
+        if (XGetSelectionOwner(ctx->dpy, selection) != window)
+	    return FALSE;
+	if (ctx->ref_count) {	/* exchange is in-progress */
+#ifdef DEBUG_ACTIVE
+	    printf( "Active exchange for widget \"%s\"; selection=0x%lx, ref_count=%d\n",
+		    XtName(widget), (long)selection, ctx->ref_count );
+#endif
+	    if (ctx->widget != widget ||
+		ctx->convert != convert ||
+		ctx->loses != lose ||
+		ctx->notify != notify ||
+		ctx->owner_cancel != cancel ||
+		ctx->incremental != incremental ||
+		ctx->owner_closure != closure)
+	    {
+		if (ctx->widget == widget) {
+		    XtRemoveEventHandler(widget, (EventMask)0, TRUE,
+					HandleSelectionEvents, (XtPointer)ctx);
+		    XtRemoveCallback(widget, XtNdestroyCallback,
+				     WidgetDestroyed, (XtPointer)ctx);
+		    replacement = TRUE;
+		}
+		else if (!ctx->was_disowned) {
+		    oldctx = ctx;
+		}
+		ctx->free_when_done = TRUE;
+		ctx = NewContext(XtDisplay(widget), selection);
+	    }
+	    else if (!ctx->was_disowned) { /* current owner is new owner */
+		ctx->time = time;
+		return TRUE;
+	    }
+	}
+    	if (ctx->widget != widget || ctx->was_disowned || replacement) {
+	    if (ctx->widget && !ctx->was_disowned && !replacement) {
+		oldctx = ctx;
+		oldctx->free_when_done = TRUE;
+		ctx = NewContext(XtDisplay(widget), selection);
+	    }
+	    XtAddEventHandler(widget, (EventMask)0, TRUE,
+			      HandleSelectionEvents, (XtPointer)ctx);
+	    XtAddCallback(widget, XtNdestroyCallback,
+			  WidgetDestroyed, (XtPointer)ctx);
+	}
+	ctx->widget = widget;	/* Selection offically changes hands. */
+	ctx->time = time;
+	ctx->serial = serial;
+    }
+    ctx->convert = convert;
+    ctx->loses = lose;
+    ctx->notify = notify;
+    ctx->owner_cancel = cancel;
+    ctx->incremental = incremental;
+    ctx->owner_closure = closure;
+    ctx->was_disowned = FALSE;
+
+    /* Defer calling the previous selection owner's lose selection procedure
+     * until the new selection is established, to allow the previous
+     * selection owner to ask for the new selection to be converted in
+     * the lose selection procedure.  The context pointer is the closure
+     * of the event handler and the destroy callback, so the old context
+     * pointer and the record contents must be preserved for LoseSelection.
+     */
+    if (oldctx) {
+	(void) LoseSelection(oldctx, oldctx->widget, selection, oldctx->time);
+	if (!oldctx->ref_count && oldctx->free_when_done)
+	    XtFree((char*)oldctx);
+    }
+    return TRUE;
+}
+
+
+Boolean XtOwnSelection(
+    Widget widget,
+    Atom selection,
+    Time time,
+    XtConvertSelectionProc convert,
+    XtLoseSelectionProc lose,
+    XtSelectionDoneProc notify)
+{
+    Boolean retval;
+    WIDGET_TO_APPCON(widget);
+
+    LOCK_APP(app);
+    retval = OwnSelection(widget, selection, time, convert, lose, notify,
+			(XtCancelConvertSelectionProc)NULL,
+			(XtPointer)NULL, FALSE);
+    UNLOCK_APP(app);
+    return retval;
+}
+
+
+Boolean XtOwnSelectionIncremental(
+    Widget widget,
+    Atom selection,
+    Time time,
+    XtConvertSelectionIncrProc convert,
+    XtLoseSelectionIncrProc lose,
+    XtSelectionDoneIncrProc notify,
+    XtCancelConvertSelectionProc cancel,
+    XtPointer closure)
+{
+    Boolean retval;
+    WIDGET_TO_APPCON(widget);
+
+    LOCK_APP(app);
+    retval = OwnSelection(widget, selection, time,
+			(XtConvertSelectionProc)convert,
+			(XtLoseSelectionProc)lose,
+			(XtSelectionDoneProc)notify,
+			cancel, closure, TRUE);
+    UNLOCK_APP(app);
+    return retval;
+}
+
+
+void XtDisownSelection(
+    Widget widget,
+    Atom selection,
+    Time time)
+{
+    Select ctx;
+    WIDGET_TO_APPCON(widget);
+
+    LOCK_APP(app);
+    ctx = FindCtx(XtDisplay(widget), selection);
+    if (LoseSelection(ctx, widget, selection, time))
+	XSetSelectionOwner(XtDisplay(widget), selection, None, time);
+    UNLOCK_APP(app);
+}
+
+/* Selection Requestor code */
+
+static Boolean IsINCRtype(
+    CallBackInfo info,
+    Window window,
+    Atom prop)
+{
+    unsigned long bytesafter;
+    unsigned long length;
+    int format;
+    Atom type;
+    unsigned char *value;
+
+    if (prop == None) return False;
+
+    (void)XGetWindowProperty(XtDisplay(info->widget), window, prop, 0L, 0L,
+			     False, info->ctx->prop_list->incr_atom,
+			     &type, &format, &length, &bytesafter, &value);
+
+    return (type == info->ctx->prop_list->incr_atom);
+}
+
+/*ARGSUSED*/
+static void ReqCleanup(
+    Widget widget,
+    XtPointer closure,
+    XEvent *ev,
+    Boolean *cont)
+{
+    CallBackInfo info = (CallBackInfo)closure;
+    unsigned long bytesafter, length;
+    char *value;
+    int format;
+    Atom target;
+
+    if (ev->type == SelectionNotify) {
+	XSelectionEvent *event = (XSelectionEvent *) ev;
+	if (!MATCH_SELECT(event, info)) return; /* not really for us */
+         XtRemoveEventHandler(widget, (EventMask)0, TRUE,
+			   ReqCleanup, (XtPointer) info );
+	if (IsINCRtype(info, XtWindow(widget), event->property)) {
+	    info->proc = HandleGetIncrement;
+	    XtAddEventHandler(info->widget, (EventMask) PropertyChangeMask,
+			      FALSE, ReqCleanup, (XtPointer) info);
+	} else {
+	   if (event->property != None)
+		XDeleteProperty(event->display, XtWindow(widget),
+				event->property);
+           FreeSelectionProperty(XtDisplay(widget), info->property);
+	   FreeInfo(info);
+	}
+    } else if ((ev->type == PropertyNotify) &&
+		(ev->xproperty.state == PropertyNewValue) &&
+	        (ev->xproperty.atom == info->property)) {
+	XPropertyEvent *event = (XPropertyEvent *) ev;
+        (void) XGetWindowProperty(event->display, XtWindow(widget),
+			   event->atom, 0L, 1000000, True, AnyPropertyType,
+			   &target, &format, &length, &bytesafter,
+			   (unsigned char **) &value);
+	XFree(value);
+	if (length == 0) {
+           XtRemoveEventHandler(widget, (EventMask) PropertyChangeMask, FALSE,
+			   ReqCleanup, (XtPointer) info );
+           FreeSelectionProperty(XtDisplay(widget), info->property);
+	   XtFree(info->value);	/* requestor never got this, so free now */
+	   FreeInfo(info);
+	}
+    }
+}
+
+/* ARGSUSED */
+static void ReqTimedOut(
+    XtPointer closure,
+    XtIntervalId   *id)
+{
+    XtPointer value = NULL;
+    unsigned long length = 0;
+    int format = 8;
+    Atom resulttype = XT_CONVERT_FAIL;
+    CallBackInfo info = (CallBackInfo)closure;
+    unsigned long bytesafter;
+    unsigned long proplength;
+    Atom type;
+    IndirectPair *pairs;
+    XtPointer *c;
+    int i;
+
+    if (*info->target == info->ctx->prop_list->indirect_atom) {
+        (void) XGetWindowProperty(XtDisplay(info->widget),
+			   XtWindow(info->widget), info->property, 0L,
+			   10000000, True, AnyPropertyType, &type, &format,
+			   &proplength, &bytesafter, (unsigned char **) &pairs);
+       XFree((char*)pairs);
+       for (proplength = proplength / IndirectPairWordSize, i = 0, c = info->req_closure;
+	           proplength; proplength--, c++, i++)
+	    (*info->callbacks[i])(info->widget, *c,
+   	          &info->ctx->selection, &resulttype, value, &length, &format);
+    } else {
+	(*info->callbacks[0])(info->widget, *info->req_closure,
+	    &info->ctx->selection, &resulttype, value, &length, &format);
+    }
+
+    /* change event handlers for straggler events */
+    if (info->proc == (XtEventHandler)HandleSelectionReplies) {
+        XtRemoveEventHandler(info->widget, (EventMask)0,
+			TRUE, info->proc, (XtPointer) info);
+	XtAddEventHandler(info->widget, (EventMask)0, TRUE,
+		ReqCleanup, (XtPointer) info);
+    } else {
+        XtRemoveEventHandler(info->widget,(EventMask) PropertyChangeMask,
+			FALSE, info->proc, (XtPointer) info);
+	XtAddEventHandler(info->widget, (EventMask) PropertyChangeMask,
+		FALSE, ReqCleanup, (XtPointer) info);
+    }
+
+}
+
+/*ARGSUSED*/
+static void HandleGetIncrement(
+    Widget widget,
+    XtPointer closure,
+    XEvent *ev,
+    Boolean *cont)
+{
+    XPropertyEvent *event = (XPropertyEvent *) ev;
+    CallBackInfo info = (CallBackInfo) closure;
+    Select ctx = info->ctx;
+    char *value;
+    unsigned long bytesafter;
+    unsigned long length;
+    int bad;
+    int n = info->current;
+
+    if ((event->state != PropertyNewValue) || (event->atom != info->property))
+	 return;
+
+    bad = XGetWindowProperty(event->display, XtWindow(widget),
+			     event->atom, 0L,
+			     10000000, True, AnyPropertyType, &info->type,
+			     &info->format, &length, &bytesafter,
+			     (unsigned char **) &value);
+    if (bad)
+      return;
+#ifndef DEBUG_WO_TIMERS
+    XtRemoveTimeOut(info->timeout);
+#endif
+    if (length == 0) {
+       unsigned long u_offset = NUMELEM(info->offset, info->format);
+       (*info->callbacks[n])(widget, *info->req_closure, &ctx->selection,
+			     &info->type,
+			     (info->offset == 0 ? value : info->value),
+			     &u_offset, &info->format);
+       /* assert ((info->offset != 0) == (info->incremental[n]) */
+       if (info->offset != 0) XFree(value);
+       XtRemoveEventHandler(widget, (EventMask) PropertyChangeMask, FALSE,
+		HandleGetIncrement, (XtPointer) info);
+       FreeSelectionProperty(event->display, info->property);
+       FreeInfo(info);
+    } else { /* add increment to collection */
+      if (info->incremental[n]) {
+#ifdef XT_COPY_SELECTION
+	  int size = BYTELENGTH(length, info->format) + 1;
+	  char *tmp = __XtMalloc((Cardinal) size);
+	  (void) memmove(tmp, value, size);
+	  XFree(value);
+	  value = tmp;
+#endif
+        (*info->callbacks[n])(widget, *info->req_closure, &ctx->selection,
+			      &info->type, value, &length, &info->format);
+      } else {
+	  int size = BYTELENGTH(length, info->format);
+	  if (info->offset + size > info->bytelength) {
+	      /* allocate enough for this and the next increment */
+	      info->bytelength = info->offset + size * 2;
+	      info->value = XtRealloc(info->value,
+				      (Cardinal) info->bytelength);
+	  }
+	  (void) memmove(&info->value[info->offset], value, size);
+	  info->offset += size;
+	  XFree(value);
+      }
+     /* reset timer */
+#ifndef DEBUG_WO_TIMERS
+     {
+     XtAppContext app = XtWidgetToApplicationContext(info->widget);
+     info->timeout = XtAppAddTimeOut(app,
+			 app->selectionTimeout, ReqTimedOut, (XtPointer) info);
+     }
+#endif
+   }
+}
+
+
+static void HandleNone(
+    Widget widget,
+    XtSelectionCallbackProc callback,
+    XtPointer closure,
+    Atom selection)
+{
+    unsigned long length = 0;
+    int format = 8;
+    Atom type = None;
+
+    (*callback)(widget, closure, &selection,
+		&type, NULL, &length, &format);
+}
+
+
+static long IncrPropSize(
+     Widget widget,
+     unsigned char* value,
+     int format,
+     unsigned long length)
+{
+    unsigned long size;
+    if (format == 32) {
+	size = ((long*)value)[length-1]; /* %%% what order for longs? */
+	return size;
+    }
+    else {
+	XtAppWarningMsg( XtWidgetToApplicationContext(widget),
+			"badFormat","xtGetSelectionValue",XtCXtToolkitError,
+	"Selection owner returned type INCR property with format != 32",
+			(String*)NULL, (Cardinal*)NULL );
+	return 0;
+    }
+}
+
+
+static
+Boolean HandleNormal(
+    Display *dpy,
+    Widget widget,
+    Atom property,
+    CallBackInfo info,
+    XtPointer closure,
+    Atom selection)
+{
+    unsigned long bytesafter;
+    unsigned long length;
+    int format;
+    Atom type;
+    unsigned char *value;
+    int number = info->current;
+
+    (void) XGetWindowProperty(dpy, XtWindow(widget), property, 0L,
+			      10000000, False, AnyPropertyType,
+			      &type, &format, &length, &bytesafter, &value);
+
+    if (type == info->ctx->prop_list->incr_atom) {
+	unsigned long size = IncrPropSize(widget, value, format, length);
+	XFree((char *)value);
+	if (info->property != property) {
+	    /* within MULTIPLE */
+	    CallBackInfo ninfo;
+	    ninfo = MakeInfo(info->ctx, &info->callbacks[number],
+			     &info->req_closure[number], 1, widget,
+			     info->time, &info->incremental[number], &property);
+	    ninfo->target = (Atom *) __XtMalloc((unsigned) sizeof(Atom));
+	    *ninfo->target = info->target[number + 1];
+	    info = ninfo;
+	}
+	HandleIncremental(dpy, widget, property, info, size);
+	return FALSE;
+    }
+
+    XDeleteProperty(dpy, XtWindow(widget), property);
+#ifdef XT_COPY_SELECTION
+    if (value) {   /* it could have been deleted after the SelectionNotify */
+	int size = BYTELENGTH(length, info->format) + 1;
+	char *tmp = __XtMalloc((Cardinal) size);
+	(void) memmove(tmp, value, size);
+	XFree(value);
+	value = (unsigned char *) tmp;
+    }
+#endif
+    (*info->callbacks[number])(widget, closure, &selection,
+			       &type, (XtPointer)value, &length, &format);
+
+    if (info->incremental[number]) {
+	/* let requestor know the whole thing has been received */
+	value = (unsigned char*)__XtMalloc((unsigned)1);
+	length = 0;
+	(*info->callbacks[number])(widget, closure, &selection,
+				   &type, (XtPointer)value, &length, &format);
+    }
+    return TRUE;
+}
+
+static void HandleIncremental(
+    Display *dpy,
+    Widget widget,
+    Atom property,
+    CallBackInfo info,
+    unsigned long size)
+{
+    XtAddEventHandler(widget, (EventMask) PropertyChangeMask, FALSE,
+		      HandleGetIncrement, (XtPointer) info);
+
+    /* now start the transfer */
+    XDeleteProperty(dpy, XtWindow(widget), property);
+    XFlush(dpy);
+
+    info->bytelength = size;
+    if (info->incremental[info->current]) /* requestor wants incremental too */
+	info->value = NULL;	/* so no need for buffer to assemble value */
+    else
+	info->value = (char *) __XtMalloc((unsigned) info->bytelength);
+    info->offset = 0;
+
+    /* reset the timer */
+    info->proc = HandleGetIncrement;
+#ifndef DEBUG_WO_TIMERS
+    {
+    XtAppContext app = XtWidgetToApplicationContext(info->widget);
+    info->timeout = XtAppAddTimeOut(app,
+			 app->selectionTimeout, ReqTimedOut, (XtPointer) info);
+    }
+#endif
+}
+
+/*ARGSUSED*/
+static void HandleSelectionReplies(
+    Widget widget,
+    XtPointer closure,
+    XEvent *ev,
+    Boolean *cont)
+{
+    XSelectionEvent *event = (XSelectionEvent *) ev;
+    Display *dpy = event->display;
+    CallBackInfo info = (CallBackInfo) closure;
+    Select ctx = info->ctx;
+    IndirectPair *pairs, *p;
+    unsigned long bytesafter;
+    unsigned long length;
+    int format;
+    Atom type;
+    XtPointer *c;
+
+    if (event->type != SelectionNotify) return;
+    if (!MATCH_SELECT(event, info)) return; /* not really for us */
+#ifndef DEBUG_WO_TIMERS
+    XtRemoveTimeOut(info->timeout);
+#endif
+    XtRemoveEventHandler(widget, (EventMask)0, TRUE,
+		HandleSelectionReplies, (XtPointer) info );
+    if (event->target == ctx->prop_list->indirect_atom) {
+        (void) XGetWindowProperty(dpy, XtWindow(widget), info->property, 0L,
+			   10000000, True, AnyPropertyType, &type, &format,
+			   &length, &bytesafter, (unsigned char **) &pairs);
+       for (length = length / IndirectPairWordSize, p = pairs,
+	    c = info->req_closure;
+	    length; length--, p++, c++, info->current++) {
+	    if (event->property == None || format != 32 || p->target == None
+		|| /* bug compatibility */ p->property == None) {
+		HandleNone(widget, info->callbacks[info->current],
+			   *c, event->selection);
+		if (p->property != None)
+                    FreeSelectionProperty(XtDisplay(widget), p->property);
+	    } else {
+		if (HandleNormal(dpy, widget, p->property, info, *c,
+				 event->selection)) {
+		    FreeSelectionProperty(XtDisplay(widget), p->property);
+		}
+	    }
+       }
+       XFree((char*)pairs);
+       FreeSelectionProperty(dpy, info->property);
+       FreeInfo(info);
+    } else if (event->property == None) {
+	HandleNone(widget, info->callbacks[0], *info->req_closure, event->selection);
+        FreeSelectionProperty(XtDisplay(widget), info->property);
+	FreeInfo(info);
+    } else {
+	if (HandleNormal(dpy, widget, event->property, info,
+			 *info->req_closure, event->selection)) {
+	    FreeSelectionProperty(XtDisplay(widget), info->property);
+	    FreeInfo(info);
+	}
+    }
+}
+
+static void DoLocalTransfer(
+    Request req,
+    Atom selection,
+    Atom target,
+    Widget widget,		/* The widget requesting the value. */
+    XtSelectionCallbackProc callback,
+    XtPointer closure,	/* the closure for the callback, not the conversion */
+    Boolean incremental,
+    Atom property)
+{
+    Select ctx = req->ctx;
+    XtPointer value = NULL, temp, total = NULL;
+    unsigned long length;
+    int format;
+    Atom resulttype;
+    unsigned long totallength = 0;
+
+        req->event.type = 0;
+        req->event.target = target;
+        req->event.property = req->property = property;
+        req->event.requestor = req->requestor = XtWindow(widget);
+
+	if (ctx->incremental) {
+	   unsigned long size = MAX_SELECTION_INCR(ctx->dpy);
+	   if (!(*(XtConvertSelectionIncrProc)ctx->convert)
+			   (ctx->widget, &selection, &target,
+			    &resulttype, &value, &length, &format,
+			    &size, ctx->owner_closure, (XtRequestId*)&req)) {
+	       HandleNone(widget, callback, closure, selection);
+	   }
+	   else {
+		if (incremental) {
+		  Boolean allSent = FALSE;
+	          while (!allSent) {
+	    	      if (ctx->notify && (value != NULL)) {
+              	        int bytelength = BYTELENGTH(length,format);
+	                /* both sides think they own this storage */
+	                temp = __XtMalloc((unsigned)bytelength);
+	                (void) memmove(temp, value, bytelength);
+	                value = temp;
+	              }
+		      /* use care; older clients were never warned that
+		       * they must return a value even if length==0
+		       */
+		     if (value == NULL) value = __XtMalloc((unsigned)1);
+		     (*callback)(widget, closure, &selection,
+			&resulttype, value, &length, &format);
+		     if (length) {
+			 /* should owner be notified on end-of-piece?
+			  * Spec is unclear, but non-local transfers don't.
+			  */
+			 (*(XtConvertSelectionIncrProc)ctx->convert)
+					(ctx->widget, &selection, &target,
+					 &resulttype, &value, &length, &format,
+					 &size, ctx->owner_closure,
+					 (XtRequestId*)&req);
+		     }
+		     else allSent = TRUE;
+		  }
+	        } else {
+	          while (length) {
+		    int bytelength = BYTELENGTH(length, format);
+		    total = XtRealloc(total,
+			    (unsigned) (totallength += bytelength));
+		    (void) memmove((char*)total + totallength - bytelength,
+			    value,
+			    bytelength);
+		    (*(XtConvertSelectionIncrProc)ctx->convert)
+			   (ctx->widget, &selection, &target,
+			    &resulttype, &value, &length, &format,
+			    &size, ctx->owner_closure, (XtRequestId*)&req);
+		  }
+		  if (total == NULL) total = __XtMalloc(1);
+		  totallength = NUMELEM(totallength, format);
+		  (*callback)(widget, closure, &selection, &resulttype,
+		    total,  &totallength, &format);
+	      }
+	      if (ctx->notify)
+		  (*(XtSelectionDoneIncrProc)ctx->notify)
+				(ctx->widget, &selection, &target,
+				 (XtRequestId*)&req, ctx->owner_closure);
+	      else XtFree((char*)value);
+	  }
+	} else { /* not incremental owner */
+	  if (!(*ctx->convert)(ctx->widget, &selection, &target,
+			     &resulttype, &value, &length, &format)) {
+	    HandleNone(widget, callback, closure, selection);
+	  } else {
+	      if (ctx->notify && (value != NULL)) {
+                int bytelength = BYTELENGTH(length,format);
+	        /* both sides think they own this storage; better copy */
+	        temp = __XtMalloc((unsigned)bytelength);
+	        (void) memmove(temp, value, bytelength);
+	        value = temp;
+	      }
+	      if (value == NULL) value = __XtMalloc((unsigned)1);
+	      (*callback)(widget, closure, &selection, &resulttype,
+			  value, &length, &format);
+	      if (ctx->notify)
+	         (*ctx->notify)(ctx->widget, &selection, &target);
+	  }
+      }
+}
+
+static void GetSelectionValue(
+    Widget widget,
+    Atom selection,
+    Atom target,
+    XtSelectionCallbackProc callback,
+    XtPointer closure,
+    Time time,
+    Boolean incremental,
+    Atom property)
+{
+    Select ctx;
+    CallBackInfo info;
+    Atom properties[1];
+
+    properties[0] = property;
+
+    ctx = FindCtx(XtDisplay(widget), selection);
+    if (ctx->widget && !ctx->was_disowned) {
+	RequestRec req;
+	ctx->req = &req;
+	req.ctx = ctx;
+	req.event.time = time;
+	ctx->ref_count++;
+	DoLocalTransfer(&req, selection, target, widget,
+			callback, closure, incremental, property);
+	if (--ctx->ref_count == 0 && ctx->free_when_done)
+	    XtFree((char*)ctx);
+	else
+	    ctx->req = NULL;
+    }
+    else {
+	info = MakeInfo(ctx, &callback, &closure, 1, widget,
+			time, &incremental, properties);
+	info->target = (Atom *)__XtMalloc((unsigned) sizeof(Atom));
+	 *(info->target) = target;
+	RequestSelectionValue(info, selection, target);
+    }
+}
+
+
+void XtGetSelectionValue(
+    Widget widget,
+    Atom selection,
+    Atom target,
+    XtSelectionCallbackProc callback,
+    XtPointer closure,
+    Time time)
+{
+    Atom property;
+    Boolean incr = False;
+    WIDGET_TO_APPCON(widget);
+
+    LOCK_APP(app);
+    property = GetParamInfo(widget, selection);
+    RemoveParamInfo(widget, selection);
+
+    if (IsGatheringRequest(widget, selection)) {
+      AddSelectionRequests(widget, selection, 1, &target, &callback, 1,
+			   &closure, &incr, &property);
+    } else {
+      GetSelectionValue(widget, selection, target, callback,
+			closure, time, FALSE, property);
+    }
+    UNLOCK_APP(app);
+}
+
+
+void XtGetSelectionValueIncremental(
+    Widget widget,
+    Atom selection,
+    Atom target,
+    XtSelectionCallbackProc callback,
+    XtPointer closure,
+    Time time)
+{
+    Atom property;
+    Boolean incr = TRUE;
+    WIDGET_TO_APPCON(widget);
+
+    LOCK_APP(app);
+    property = GetParamInfo(widget, selection);
+    RemoveParamInfo(widget, selection);
+
+    if (IsGatheringRequest(widget, selection)) {
+      AddSelectionRequests(widget, selection, 1, &target, &callback, 1,
+			   &closure, &incr, &property);
+    } else {
+      GetSelectionValue(widget, selection, target, callback,
+			closure, time, TRUE, property);
+    }
+
+    UNLOCK_APP(app);
+}
+
+
+static void GetSelectionValues(
+    Widget widget,
+    Atom selection,
+    Atom *targets,
+    int count,
+    XtSelectionCallbackProc *callbacks,
+    int num_callbacks,
+    XtPointer *closures,
+    Time time,
+    Boolean *incremental,
+    Atom *properties)
+{
+    Select ctx;
+    CallBackInfo info;
+    IndirectPair *pairs, *p;
+    Atom *t;
+
+    if (count == 0) return;
+    ctx = FindCtx(XtDisplay(widget), selection);
+    if (ctx->widget && !ctx->was_disowned) {
+        int j, i;
+	RequestRec req;
+	ctx->req = &req;
+	req.ctx = ctx;
+	req.event.time = time;
+	ctx->ref_count++;
+	for (i = 0, j = 0; count; count--, i++, j++ ) {
+	  if (j >= num_callbacks) j = 0;
+
+	  DoLocalTransfer(&req, selection, targets[i], widget,
+			  callbacks[j], closures[i], incremental[i],
+			  properties ? properties[i] : None);
+
+	}
+	if (--ctx->ref_count == 0 && ctx->free_when_done)
+	    XtFree((char*)ctx);
+	else
+	    ctx->req = NULL;
+    } else {
+        XtSelectionCallbackProc *passed_callbacks;
+	XtSelectionCallbackProc stack_cbs[32];
+        int i = 0, j = 0;
+
+	passed_callbacks = (XtSelectionCallbackProc *)
+	  XtStackAlloc(sizeof(XtSelectionCallbackProc) * count, stack_cbs);
+
+	/* To deal with the old calls from XtGetSelectionValues* we
+	   will repeat however many callbacks have been passed into
+	   the array */
+	for(i = 0; i < count; i++) {
+	  if (j >= num_callbacks) j = 0;
+	  passed_callbacks[i] = callbacks[j];
+	  j++;
+	}
+	info = MakeInfo(ctx, passed_callbacks, closures, count, widget,
+			time, incremental, properties);
+	XtStackFree((XtPointer) passed_callbacks, stack_cbs);
+
+	info->target = (Atom *)__XtMalloc((unsigned) ((count+1) * sizeof(Atom)));
+        (*info->target) = ctx->prop_list->indirect_atom;
+	(void) memmove((char *) info->target+sizeof(Atom), (char *) targets,
+		       count * sizeof(Atom));
+	pairs = (IndirectPair*)__XtMalloc((unsigned)(count*sizeof(IndirectPair)));
+	for (p = &pairs[count-1], t = &targets[count-1], i = count - 1;
+	     p >= pairs;  p--, t--, i--) {
+	   p->target = *t;
+	   if (properties == NULL || properties[i] == None) {
+	     p->property = GetSelectionProperty(XtDisplay(widget));
+	     XDeleteProperty(XtDisplay(widget), XtWindow(widget),
+			     p->property);
+	   } else {
+	     p->property = properties[i];
+	   }
+	}
+	XChangeProperty(XtDisplay(widget), XtWindow(widget),
+			info->property, info->property,
+			32, PropModeReplace, (unsigned char *) pairs,
+			count * IndirectPairWordSize);
+	XtFree((char*)pairs);
+	RequestSelectionValue(info, selection, ctx->prop_list->indirect_atom);
+    }
+}
+
+
+void XtGetSelectionValues(
+    Widget widget,
+    Atom selection,
+    Atom *targets,
+    int count,
+    XtSelectionCallbackProc callback,
+    XtPointer *closures,
+    Time time)
+{
+    Boolean incremental_values[32];
+    Boolean *incremental;
+    int i;
+    WIDGET_TO_APPCON(widget);
+
+    LOCK_APP(app);
+    incremental = XtStackAlloc(count * sizeof(Boolean), incremental_values);
+    for(i = 0; i < count; i++) incremental[i] = FALSE;
+    if (IsGatheringRequest(widget, selection)) {
+      AddSelectionRequests(widget, selection, count, targets, &callback,
+			   1, closures, incremental, NULL);
+    } else {
+      GetSelectionValues(widget, selection, targets, count, &callback, 1,
+			 closures, time, incremental, NULL);
+    }
+    XtStackFree((XtPointer) incremental, incremental_values);
+    UNLOCK_APP(app);
+}
+
+
+void XtGetSelectionValuesIncremental(
+    Widget widget,
+    Atom selection,
+    Atom *targets,
+    int count,
+    XtSelectionCallbackProc callback,
+    XtPointer *closures,
+    Time time)
+{
+    Boolean incremental_values[32];
+    Boolean *incremental;
+    int i;
+    WIDGET_TO_APPCON(widget);
+
+    LOCK_APP(app);
+    incremental = XtStackAlloc(count * sizeof(Boolean), incremental_values);
+    for(i = 0; i < count; i++) incremental[i] = TRUE;
+    if (IsGatheringRequest(widget, selection)) {
+      AddSelectionRequests(widget, selection, count, targets, &callback,
+			   1, closures, incremental, NULL);
+    } else {
+      GetSelectionValues(widget, selection, targets, count,
+			 &callback, 1, closures, time, incremental, NULL);
+    }
+    XtStackFree((XtPointer) incremental, incremental_values);
+    UNLOCK_APP(app);
+}
+
+
+static Request GetRequestRecord(
+    Widget widget,
+    Atom selection,
+    XtRequestId id)
+{
+    Request req = (Request)id;
+    Select ctx = NULL;
+
+    if (   (req == NULL
+	    && ((ctx = FindCtx( XtDisplay(widget), selection )) == NULL
+		|| ctx->req == NULL
+		|| ctx->selection != selection
+		|| ctx->widget == NULL))
+	|| (req != NULL
+	    && (req->ctx == NULL
+		|| req->ctx->selection != selection
+		|| req->ctx->widget != widget)))
+    {
+	String params = XtName(widget);
+	Cardinal num_params = 1;
+	XtAppWarningMsg(XtWidgetToApplicationContext(widget),
+			 "notInConvertSelection", "xtGetSelectionRequest",
+			 XtCXtToolkitError,
+			 "XtGetSelectionRequest or XtGetSelectionParameters called for widget \"%s\" outside of ConvertSelection proc",
+			 &params, &num_params
+		       );
+	return NULL;
+    }
+
+    if (req == NULL) {
+	/* non-incremental owner; only one request can be
+	 * outstanding at a time, so it's safe to keep ptr in ctx */
+	req = ctx->req;
+    }
+    return req;
+}
+
+XSelectionRequestEvent *XtGetSelectionRequest(
+    Widget widget,
+    Atom selection,
+    XtRequestId id)
+{
+    Request req = (Request)id;
+    WIDGET_TO_APPCON(widget);
+
+    LOCK_APP(app);
+
+    req = GetRequestRecord(widget, selection, id);
+
+    if (! req) {
+	UNLOCK_APP(app);
+	return (XSelectionRequestEvent*) NULL;
+    }
+
+    if (req->event.type == 0) {
+	/* owner is local; construct the remainder of the event */
+	req->event.type = SelectionRequest;
+	req->event.serial = LastKnownRequestProcessed(XtDisplay(widget));
+	req->event.send_event = True;
+	req->event.display = XtDisplay(widget);
+	req->event.owner = XtWindow(req->ctx->widget);
+	req->event.selection = selection;
+    }
+    UNLOCK_APP(app);
+    return &req->event;
+}
+
+/* Property atom access */
+Atom XtReservePropertyAtom(
+     Widget w)
+{
+  return(GetSelectionProperty(XtDisplay(w)));
+}
+
+void XtReleasePropertyAtom(
+     Widget w,
+     Atom atom)
+{
+  FreeSelectionProperty(XtDisplay(w), atom);
+}
+
+
+/* Multiple utilities */
+
+/* All requests are put in a single list per widget.  It is
+   very unlikely anyone will be gathering multiple MULTIPLE
+   requests at the same time,  so the loss in efficiency for
+   this case is acceptable */
+
+/* Queue one or more requests to the one we're gathering */
+static void AddSelectionRequests(
+     Widget wid,
+     Atom sel,
+     int count,
+     Atom *targets,
+     XtSelectionCallbackProc *callbacks,
+     int num_cb,
+     XtPointer *closures,
+     Boolean *incrementals,
+     Atom *properties)
+{
+  QueuedRequestInfo qi;
+  Window window = XtWindow(wid);
+  Display *dpy = XtDisplay(wid);
+
+  LOCK_PROCESS;
+  if (multipleContext == 0) multipleContext = XUniqueContext();
+
+  qi = NULL;
+  (void) XFindContext(dpy, window, multipleContext, (XPointer*) &qi);
+
+  if (qi != NULL) {
+    QueuedRequest *req = qi->requests;
+    int start = qi->count;
+    int i = 0;
+    int j = 0;
+
+    qi->count += count;
+    req = (QueuedRequest*) XtRealloc((char*) req,
+				     (start + count) *
+				     sizeof(QueuedRequest));
+    while(i < count) {
+      QueuedRequest newreq = (QueuedRequest)
+	__XtMalloc(sizeof(QueuedRequestRec));
+      newreq->selection = sel;
+      newreq->target = targets[i];
+      if (properties != NULL)
+	newreq->param = properties[i];
+      else {
+	newreq->param = GetSelectionProperty(dpy);
+	XDeleteProperty(dpy, window, newreq->param);
+      }
+      newreq->callback = callbacks[j];
+      newreq->closure = closures[i];
+      newreq->incremental = incrementals[i];
+
+      req[start] = newreq;
+      start++;
+      i++;
+      j++;
+      if (j > num_cb) j = 0;
+    }
+
+    qi->requests = req;
+  } else {
+    /* Impossible */
+  }
+
+  UNLOCK_PROCESS;
+}
+
+/* Only call IsGatheringRequest when we have a lock already */
+
+static Boolean IsGatheringRequest(
+     Widget wid,
+     Atom sel)
+{
+  QueuedRequestInfo qi;
+  Window window = XtWindow(wid);
+  Display *dpy = XtDisplay(wid);
+  Boolean found = False;
+  int i;
+
+  if (multipleContext == 0) multipleContext = XUniqueContext();
+
+  qi = NULL;
+  (void) XFindContext(dpy, window, multipleContext, (XPointer*) &qi);
+
+  if (qi != NULL) {
+    i = 0;
+    while(qi->selections[i] != None) {
+      if (qi->selections[i] == sel) {
+	found = True;
+	break;
+      }
+      i++;
+    }
+  }
+
+  return(found);
+}
+
+/* Cleanup request scans the request queue and releases any
+   properties queued, and removes any requests queued */
+static void CleanupRequest(
+     Display *dpy,
+     QueuedRequestInfo qi,
+     Atom sel)
+{
+  int i, j, n;
+
+  i = 0;
+
+  /* Remove this selection from the list */
+  n = 0;
+  while(qi->selections[n] != sel &&
+	qi->selections[n] != None) n++;
+  if (qi->selections[n] == sel) {
+    while(qi->selections[n] != None) {
+      qi->selections[n] = qi->selections[n + 1];
+      n++;
+    }
+  }
+
+  while(i < qi->count) {
+    QueuedRequest req = qi->requests[i];
+
+    if (req->selection == sel) {
+      /* Match */
+      if (req->param != None)
+	FreeSelectionProperty(dpy, req->param);
+      qi->count--;
+
+      for(j = i; j < qi->count; j++)
+	qi->requests[j] = qi->requests[j + 1];
+
+      XtFree((char*) req);
+    } else {
+      i++;
+    }
+  }
+}
+
+void XtCreateSelectionRequest(
+    Widget widget,
+    Atom selection)
+{
+  QueuedRequestInfo queueInfo;
+  Window window = XtWindow(widget);
+  Display *dpy = XtDisplay(widget);
+  int n;
+
+  LOCK_PROCESS;
+  if (multipleContext == 0) multipleContext = XUniqueContext();
+
+  queueInfo = NULL;
+  (void) XFindContext(dpy, window, multipleContext, (XPointer*) &queueInfo);
+
+  /* If there is one,  then cancel it */
+  if (queueInfo != NULL)
+    CleanupRequest(dpy, queueInfo, selection);
+  else {
+    /* Create it */
+    queueInfo = (QueuedRequestInfo) __XtMalloc(sizeof(QueuedRequestInfoRec));
+    queueInfo->count = 0;
+    queueInfo->selections = (Atom*) __XtMalloc(sizeof(Atom) * 2);
+    queueInfo->selections[0] = None;
+    queueInfo->requests = (QueuedRequest *)
+      __XtMalloc(sizeof(QueuedRequest));
+  }
+
+  /* Append this selection to list */
+  n = 0;
+  while(queueInfo->selections[n] != None) n++;
+  queueInfo->selections =
+    (Atom*) XtRealloc((char*) queueInfo->selections,
+		      (n + 2) * sizeof(Atom));
+  queueInfo->selections[n] = selection;
+  queueInfo->selections[n + 1] = None;
+
+  (void) XSaveContext(dpy, window, multipleContext, (char*) queueInfo);
+  UNLOCK_PROCESS;
+}
+
+void XtSendSelectionRequest(
+    Widget widget,
+    Atom selection,
+    Time time)
+{
+  QueuedRequestInfo queueInfo;
+  Window window = XtWindow(widget);
+  Display *dpy = XtDisplay(widget);
+
+  LOCK_PROCESS;
+  if (multipleContext == 0) multipleContext = XUniqueContext();
+
+  queueInfo = NULL;
+  (void) XFindContext(dpy, window, multipleContext, (XPointer*) &queueInfo);
+  if (queueInfo != NULL) {
+    int count = 0;
+    int i;
+    QueuedRequest *req = queueInfo->requests;
+
+    /* Construct the requests and send it using
+       GetSelectionValues */
+    for(i = 0; i < queueInfo->count; i++)
+      if (req[i]->selection == selection) count++;
+
+    if (count > 0) {
+      if (count == 1) {
+	for(i = 0; i < queueInfo->count; i++)
+	  if (req[i]->selection == selection) break;
+
+	/* special case a multiple which isn't needed */
+	GetSelectionValue(widget, selection, req[i]->target,
+			  req[i]->callback, req[i]->closure, time,
+			  req[i]->incremental, req[i]->param);
+      } else {
+	Atom *targets;
+	Atom t[PREALLOCED];
+	XtSelectionCallbackProc *cbs;
+	XtSelectionCallbackProc c[PREALLOCED];
+	XtPointer *closures;
+	XtPointer cs[PREALLOCED];
+	Boolean *incrs;
+	Boolean ins[PREALLOCED];
+	Atom *props;
+	Atom p[PREALLOCED];
+	int i = 0;
+	int j = 0;
+
+	/* Allocate */
+	targets = (Atom *) XtStackAlloc(count * sizeof(Atom), t);
+	cbs = (XtSelectionCallbackProc *)
+	  XtStackAlloc(count * sizeof(XtSelectionCallbackProc), c);
+	closures = (XtPointer *) XtStackAlloc(count * sizeof(XtPointer), cs);
+	incrs = (Boolean *) XtStackAlloc(count * sizeof(Boolean), ins);
+	props = (Atom *) XtStackAlloc(count * sizeof(Atom), p);
+
+	/* Copy */
+	for(i = 0; i < queueInfo->count; i++) {
+	  if (req[i]->selection == selection) {
+	    targets[j] = req[i]->target;
+	    cbs[j] = req[i]->callback;
+	    closures[j] = req[i]->closure;
+	    incrs[j] = req[i]->incremental;
+	    props[j] = req[i]->param;
+	    j++;
+	  }
+	}
+
+	/* Make the request */
+	GetSelectionValues(widget, selection, targets, count,
+			   cbs, count, closures, time, incrs, props);
+
+	/* Free */
+	XtStackFree((XtPointer) targets, t);
+	XtStackFree((XtPointer) cbs, c);
+	XtStackFree((XtPointer) closures, cs);
+	XtStackFree((XtPointer) incrs, ins);
+	XtStackFree((XtPointer) props, p);
+      }
+    }
+  }
+
+  CleanupRequest(dpy, queueInfo, selection);
+  UNLOCK_PROCESS;
+}
+
+void XtCancelSelectionRequest(
+    Widget widget,
+    Atom selection)
+{
+  QueuedRequestInfo queueInfo;
+  Window window = XtWindow(widget);
+  Display *dpy = XtDisplay(widget);
+
+  LOCK_PROCESS;
+  if (multipleContext == 0) multipleContext = XUniqueContext();
+
+  queueInfo = NULL;
+  (void) XFindContext(dpy, window, multipleContext, (XPointer*) &queueInfo);
+  /* If there is one,  then cancel it */
+  if (queueInfo != NULL)
+    CleanupRequest(dpy, queueInfo, selection);
+  UNLOCK_PROCESS;
+}
+
+/* Parameter utilities */
+
+/* Parameters on a selection request */
+/* Places data on allocated parameter atom,  then records the
+   parameter atom data for use in the next call to one of
+   the XtGetSelectionValue functions. */
+void XtSetSelectionParameters(
+    Widget requestor,
+    Atom selection,
+    Atom type,
+    XtPointer value,
+    unsigned long length,
+    int format)
+{
+  Display *dpy = XtDisplay(requestor);
+  Window window = XtWindow(requestor);
+  Atom property = GetParamInfo(requestor, selection);
+
+  if (property == None) {
+    property = GetSelectionProperty(dpy);
+    AddParamInfo(requestor, selection, property);
+  }
+
+  XChangeProperty(dpy, window, property,
+		  type, format, PropModeReplace,
+		  (unsigned char *) value, length);
+}
+
+/* Retrieves data passed in a parameter. Data for this is stored
+   on the originator's window */
+void XtGetSelectionParameters(
+    Widget owner,
+    Atom selection,
+    XtRequestId request_id,
+    Atom* type_return,
+    XtPointer* value_return,
+    unsigned long* length_return,
+    int* format_return)
+{
+    Request req;
+    Display *dpy = XtDisplay(owner);
+    WIDGET_TO_APPCON(owner);
+
+    *value_return = NULL;
+    *length_return = *format_return = 0;
+    *type_return = None;
+
+    LOCK_APP(app);
+
+    req = GetRequestRecord(owner, selection, request_id);
+
+    if (req && req->property) {
+	unsigned long bytes_after;	/* unused */
+	StartProtectedSection(dpy, req->requestor);
+	XGetWindowProperty(dpy, req->requestor, req->property, 0L, 10000000,
+			   False, AnyPropertyType, type_return, format_return,
+			   length_return, &bytes_after,
+			   (unsigned char**) value_return);
+	EndProtectedSection(dpy);
+#ifdef XT_COPY_SELECTION
+	if (*value_return) {
+	    int size = BYTELENGTH(*length_return, *format_return) + 1;
+	    char *tmp = __XtMalloc((Cardinal) size);
+	    (void) memmove(tmp, *value_return, size);
+	    XFree(*value_return);
+	    *value_return = tmp;
+	}
+#endif
+    }
+    UNLOCK_APP(app);
+}
+
+/*  Parameters are temporarily stashed in an XContext.  A list is used because
+ *  there may be more than one selection request in progress.  The context
+ *  data is deleted when the list is empty.  In the future, the parameter
+ *  context could be merged with other contexts used during selections.
+ */
+
+static void AddParamInfo(
+    Widget w,
+    Atom selection,
+    Atom param_atom)
+{
+    int n;
+    Param p;
+    ParamInfo pinfo;
+
+    LOCK_PROCESS;
+    if (paramPropertyContext == 0)
+	paramPropertyContext = XUniqueContext();
+
+    if (XFindContext(XtDisplay(w), XtWindow(w), paramPropertyContext,
+		     (XPointer *) &pinfo)) {
+	pinfo = (ParamInfo) __XtMalloc(sizeof(ParamInfoRec));
+	pinfo->count = 1;
+	pinfo->paramlist = XtNew(ParamRec);
+	p = pinfo->paramlist;
+	(void) XSaveContext(XtDisplay(w), XtWindow(w), paramPropertyContext,
+			    (char *)pinfo);
+    }
+    else {
+	for (n = pinfo->count, p = pinfo->paramlist; n; n--, p++) {
+	    if (p->selection == None || p->selection == selection)
+		break;
+	}
+	if (n == 0) {
+	    pinfo->count++;
+	    pinfo->paramlist = (Param)
+		XtRealloc((char*) pinfo->paramlist,
+			  pinfo->count * sizeof(ParamRec));
+	    p = &pinfo->paramlist[pinfo->count - 1];
+	    (void) XSaveContext(XtDisplay(w), XtWindow(w),
+				paramPropertyContext, (char *)pinfo);
+	}
+    }
+    p->selection = selection;
+    p->param = param_atom;
+    UNLOCK_PROCESS;
+}
+
+static void RemoveParamInfo(
+    Widget w,
+    Atom selection)
+{
+    int n;
+    Param p;
+    ParamInfo pinfo;
+    Boolean retain = False;
+
+    LOCK_PROCESS;
+    if (paramPropertyContext
+	&& (XFindContext(XtDisplay(w), XtWindow(w), paramPropertyContext,
+			 (XPointer *) &pinfo) == 0)) {
+
+	/* Find and invalidate the parameter data. */
+	for (n = pinfo->count, p = pinfo->paramlist; n; n--, p++) {
+	    if (p->selection != None) {
+		if (p->selection == selection)
+		    p->selection = None;
+		else
+		    retain = True;
+	    }
+	}
+	/* If there's no valid data remaining, release the context entry. */
+	if (! retain) {
+	    XtFree((char*) pinfo->paramlist);
+	    XtFree((char*) pinfo);
+	    XDeleteContext(XtDisplay(w), XtWindow(w), paramPropertyContext);
+	}
+    }
+    UNLOCK_PROCESS;
+}
+
+static Atom GetParamInfo(
+    Widget w,
+    Atom selection)
+{
+    int n;
+    Param p;
+    ParamInfo pinfo;
+    Atom atom = None;
+
+    LOCK_PROCESS;
+    if (paramPropertyContext
+	&& (XFindContext(XtDisplay(w), XtWindow(w), paramPropertyContext,
+			 (XPointer *) &pinfo) == 0)) {
+
+	for (n = pinfo->count, p = pinfo->paramlist; n; n--, p++)
+	    if (p->selection == selection) {
+		atom = p->param;
+		break;
+	    }
+    }
+    UNLOCK_PROCESS;
+    return atom;
+}