Highlight a line

A recent article on c.e.x. pointed out that Emacs has a mode that highlights the line containing point, and wondered whether XEmacs had such a thing. The Emacs version uses overlays, and an additional argument to define-minor-mode that we don't have (should we?). I did a quick port to use extents and work around the define-minor-mode deficiency and posted the result to c.e.x. However, it wasn't a full port, because Emacs can specify that an overlay is associated with a particular window. We can't do that with extents, which are always associated to a buffer or string. The result is that the Emacs version can highlight different lines in the same buffer appearing in different windows, but my version can't. I tried to fix that deficiency, because I think this is cool and would like to see it work on XEmacs. I'm attaching my first attempt, which is also my first time using specifiers. It's kind of complex, but the "local" mode seems to work. The "global" mode does not, however. Only the original window gets a highlighted bar; other windows don't. Could you specifier gurus out there check the code and see if I did anything obviously wrong? Thanks, -- Jerry James http://www.ittc.ku.edu/~james/