Re: Face of wrap-prefix in adaptive-wrap

[Eli Zaretskii <eliz@gnu.org>]

> From: Frank Fischer <frank.fischer@mathematik.tu-chemnitz.de>
> Date: Wed, 21 Aug 2013 09:06:03 +0200
> 
> I often use visual-line-mode together with adaptive-wrap-mode when
> writing certain kinds of text (in particular LaTeX). However, It seems
> as if the prefix-text in the wrapped lines does not share the face of
> the original prefix in the first visual line: screenshot [1] shows an
> emacs-lisp buffer with a wrapped comment. The (comment) prefix of the
> successive lines is black instead of red.
> 
> The problem becomes more apparent when used in conjunction with
> variable-width fonts, which I use with LaTeX files [2]. The first
> wrapped line has again a comment prefix, but the successive lines seem
> to use the wrong (fixed width) font. The second wrapped line has only a
> whitespace prefix, but again the wrap-prefix seems to use the wrong font
> (with "larger" spaces) causing a too large indentation of the successive
> lines (I would expect the successive lines to have exactly the same
> indentation as the first visual line). This problem gets
> worse as the indentation of the first line is increased.
> 
> IIRC the problem did not exist in Emacs 23 (the examples are all with
> Emacs 24.2.1), where the wrap-prefix always had the same font as the
> original prefix (but I may be wrong).
> 
> Is there a way to make the wrap-prefix have the same font/face as the
> original prefix?

I suggest to create a simple test case, starting with "emacs -Q", and
report it as a bug with "M-x report-emacs-bug RET".  Then the Emacs
maintainers could see if this indeed worked in previous versions, and
what will it take to do what you want.