diff -r 56cd8111b7f7 -r 41300fa6a67c src/gui/text/qtextdocument.h
--- a/src/gui/text/qtextdocument.h	Tue Jan 26 12:42:25 2010 +0200
+++ b/src/gui/text/qtextdocument.h	Tue Feb 02 00:43:10 2010 +0200
@@ -142,6 +142,9 @@
     bool isUndoAvailable() const;
     bool isRedoAvailable() const;
 
+    int availableUndoSteps() const;
+    int availableRedoSteps() const;
+
     int revision() const;
 
     void setDocumentLayout(QAbstractTextDocumentLayout *layout);