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diff --git a/nx-X11/lib/Xt/Hooks.c b/nx-X11/lib/Xt/Hooks.c
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+/* $Xorg: Hooks.c,v 1.4 2001/02/09 02:03:55 xorgcvs Exp $ */
+
+/*
+
+Copyright 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/Hooks.c,v 1.3 2001/12/14 19:56:18 dawes Exp $ */
+
+/*LINTLIBRARY*/
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+#include "IntrinsicI.h"
+#include "CreateI.h"
+
+static void FreeBlockHookList(
+ Widget widget, /* unused (and invalid) */
+ XtPointer closure, /* ActionHook* */
+ XtPointer call_data) /* unused */
+{
+ BlockHook list = *(BlockHook*)closure;
+ while (list != NULL) {
+ BlockHook next = list->next;
+ XtFree( (XtPointer)list );
+ list = next;
+ }
+}
+
+
+XtBlockHookId XtAppAddBlockHook(
+ XtAppContext app,
+ XtBlockHookProc proc,
+ XtPointer closure)
+{
+ BlockHook hook = XtNew(BlockHookRec);
+ LOCK_APP(app);
+ hook->next = app->block_hook_list;
+ hook->app = app;
+ hook->proc = proc;
+ hook->closure = closure;
+ if (app->block_hook_list == NULL) {
+ _XtAddCallback( &app->destroy_callbacks,
+ FreeBlockHookList,
+ (XtPointer)&app->block_hook_list
+ );
+ }
+ app->block_hook_list = hook;
+ UNLOCK_APP(app);
+ return (XtBlockHookId)hook;
+}
+
+
+void XtRemoveBlockHook(
+ XtBlockHookId id)
+{
+ BlockHook *p, hook = (BlockHook)id;
+ XtAppContext app = hook->app;
+ LOCK_APP(app);
+ for (p = &app->block_hook_list; p != NULL && *p != hook; p = &(*p)->next);
+ if (p == NULL) {
+#ifdef DEBUG
+ XtAppWarningMsg(app, "badId", "xtRemoveBlockHook", XtCXtToolkitError,
+ "XtRemoveBlockHook called with bad or old hook id",
+ (String*)NULL, (Cardinal*)NULL);
+#endif /*DEBUG*/
+ UNLOCK_APP(app);
+ return;
+ }
+ *p = hook->next;
+ XtFree( (XtPointer)hook );
+ UNLOCK_APP(app);
+}
+
+static void DeleteShellFromHookObj(
+ Widget shell,
+ XtPointer closure,
+ XtPointer call_data)
+{
+ /* app_con is locked when this function is called */
+ Cardinal ii, jj;
+ HookObject ho = (HookObject) closure;
+
+ for (ii = 0; ii < ho->hooks.num_shells; ii++)
+ if (ho->hooks.shells[ii] == shell) {
+ /* collapse the list */
+ for (jj = ii; jj < ho->hooks.num_shells; jj++) {
+ if ((jj+1) < ho->hooks.num_shells)
+ ho->hooks.shells[jj] = ho->hooks.shells[jj+1];
+ }
+ break;
+ }
+ ho->hooks.num_shells--;
+}
+
+#define SHELL_INCR 4
+
+void _XtAddShellToHookObj(
+ Widget shell)
+{
+ /* app_con is locked when this function is called */
+ HookObject ho = (HookObject) XtHooksOfDisplay(XtDisplay(shell));
+
+ if (ho->hooks.num_shells == ho->hooks.max_shells) {
+ ho->hooks.max_shells += SHELL_INCR;
+ ho->hooks.shells =
+ (WidgetList)XtRealloc((char*)ho->hooks.shells,
+ ho->hooks.max_shells * sizeof (Widget));
+ }
+ ho->hooks.shells[ho->hooks.num_shells++] = shell;
+
+ XtAddCallback(shell, XtNdestroyCallback, DeleteShellFromHookObj,
+ (XtPointer)ho);
+}
+
+Boolean _XtIsHookObject(
+ Widget widget)
+{
+ return (widget->core.widget_class == hookObjectClass);
+}
+
+Widget XtHooksOfDisplay(
+ Display* dpy)
+{
+ Widget retval;
+ XtPerDisplay pd;
+ DPY_TO_APPCON(dpy);
+
+ LOCK_APP(app);
+ pd = _XtGetPerDisplay(dpy);
+ if (pd->hook_object == NULL)
+ pd->hook_object =
+ _XtCreateHookObj((Screen*)DefaultScreenOfDisplay(dpy));
+ retval = pd->hook_object;
+ UNLOCK_APP(app);
+ return retval;
+}