Re: ;;; tooltip-at-point.el --- library for displaying tooltips at (point)

[Richard Stallman]

    ;; It is also impossible to calculate the cursor position based on frame 
width,
    ;; position and window sizes due to the fact that Emacs can use dynamic 
fonts on
    ;; Emacs 21.

This is one of the tasks in the task list.  It would be really great
if someone would decide to implement primitives to do these
calculations.