--- /data/zzz/gtk-2.6/gtk+-2.6.10/gtk/gtktextview.c	2005-08-18 22:10:59.000000000 +0800
+++ gtk/gtktextview.c	2006-07-03 15:34:19.880257250 +0800
@@ -3855,6 +3855,22 @@ gtk_text_view_key_press_event (GtkWidget
 
   insert = gtk_text_buffer_get_insert (get_buffer (text_view));
   gtk_text_buffer_get_iter_at_mark (get_buffer (text_view), &iter, insert);
+
+  int lineCount = gtk_text_buffer_get_line_count (get_buffer (text_view));
+  int curLine = gtk_text_iter_get_line (&iter);
+  if (curLine == 0 && (event->keyval == GDK_Up || event->keyval == GDK_KP_Up)
+      && (!gtk_widget_keynav_failed (GTK_WIDGET(text_view), GTK_DIR_UP)))
+  {
+    gtk_text_view_move_focus (text_view,GTK_DIR_TAB_BACKWARD);
+    return TRUE;
+  }
+  else if (curLine == (lineCount - 1) && (event->keyval == GDK_Down || event->keyval == GDK_KP_Down) 
+           && (!gtk_widget_keynav_failed (GTK_WIDGET(text_view), GTK_DIR_DOWN)))
+  {
+    gtk_text_view_move_focus (text_view,GTK_DIR_TAB_FORWARD);
+    return TRUE;
+  }
+
   can_insert = gtk_text_iter_can_insert (&iter, text_view->editable);
   if (can_insert &&
       gtk_im_context_filter_keypress (text_view->im_context, event))