1 files changed, 6 insertions, 0 deletions
diff --git a/fpdfsdk/pwl/cpwl_wnd.h b/fpdfsdk/pwl/cpwl_wnd.h
index 9c790eb5b8..a24635fa1f 100644
--- a/fpdfsdk/pwl/cpwl_wnd.h
+++ b/fpdfsdk/pwl/cpwl_wnd.h
@@ -184,6 +184,12 @@ class CPWL_Wnd : public CPWL_TimerHandler, public Observable<CPWL_Wnd> {
   virtual WideString GetText();
   virtual WideString GetSelectedText();
   virtual void ReplaceSelection(const WideString& text);
+
+  virtual bool CanUndo();
+  virtual bool CanRedo();
+  virtual bool Undo();
+  virtual bool Redo();
+
   virtual CFX_FloatRect GetFocusRect() const;
   virtual CFX_FloatRect GetClientRect() const;