Re: From mode-line-format to string?

[Kevin Rodgers]

Kai Großjohann wrote:

> I have the need for a variable with some of the features from
> mode-line-format.  In particular, I'd like the concatenation features
> and the list-with-first-element-being-variable feature.
>
> So processing the value ("a" "b") should result in the string "ab".
> (That's concatenation.)
>
> And processing the value ((foo "valfoo") (bar "valbar")) should
> result in "valfoovalbar" if both variables foo and bar are non-nil.
> Else if bar is nil and foo is non-nil, "valfoo" should result, else if
> foo is nil and bar is non-nil, "valbar" should result.
>
> Is there a Lisp function or library that does this?


Sure:


http://groups.google.com/groups?selm=3CB48625.14978022%40ihs.com


;;; Description:
;;;
;;; Emacs doesn't provide distinct functions for (1) generating a string
;;; from `mode-line-format' and (2) displaying it in the mode line.  In
;;; src/xdisp.c, display_mode_element() does both, and it doesn't have a
;;; Lisp binding.  apply-mode-line-format.el defines an eponymous Lisp
;;; function that returns any `mode-line-format' template as a string.

--
Kevin Rodgers <kevinr@ihs.com>