Hiding Emacs' Mouse Pointer

Greetings folks. Another afternoon spent shaving yaks.

Out of the box Emacs is configured to hide the mouse pointer when the keyboard is used, a sane default if you ask me, with only a small detail in its current implementation: the pointer is hidden only when is typed a self-inserting-character. In other words, moving the cursor with the keyboard doesn't hide the mouse pointer.

And in my case, the mouse pointer always lands where I want to read.

I've checked the available documentation and I can't find anything that can help me, so it seems that I need to hack the sources. So the other day I've tried to modify the move_point¹ function in cmds.c with a tentative patch:

diff -u emacs-25.3/src/cmds.c emacs-25.3-mod/src/cmds.c
--- emacs-25.3/src/cmds.c
+++ emacs-25.3-mod/src/cmds.c
@@ -71,6 +71,8 @@
       xsignal0 (Qend_of_buffer);
     }

+  frame_make_pointer_invisible (SELECTED_FRAME ());
+
   SET_PT (new_point);
   return Qnil;
 }

Yay! It worked after the first attempt.

Well, it's not the cleanest solution as I've introduced at least one side effect: when used in combination with Gnome's windows sloppy focus mode² the window focus event hide the pointer without touching the keyboard. For the moment it doesn't bother me and it's good enough, probably I need to put a condition to not hide the pointer if it's an X focus event.