1 files changed, 7 insertions, 0 deletions
diff --git a/FL/Fl_Screen_Driver.H b/FL/Fl_Screen_Driver.H
index 55824a014..cd847684e 100644
--- a/FL/Fl_Screen_Driver.H
+++ b/FL/Fl_Screen_Driver.H
@@ -91,6 +91,13 @@ public:
   virtual void remove_timeout(Fl_Timeout_Handler cb, void *argp) = 0;
 
   static int secret_input_character;
+  /* Implement to indicate whether complex text input may involve marked text.
+   When it does, has_marked_text returns non zero and reset_marked_text() and
+   insertion_point_location() must also be implemented.
+   */
+  virtual int has_marked_text() { return 0; }
+  virtual void reset_marked_text() {}
+  virtual void insertion_point_location(int x, int y, int height) {}
 };