Re: Underline fontification

[Hendrik Rommeswinkel]

Hi all,

Looking through some old emacs bugreports I just found out about the variable 
overline-margin. If set to 0 instead of 2, overlines actually look great. They 
are exactly symmetric to underlines with this setting. So one could add 
overline fontification by adding an overline font and setting overline-margin 
to 0 in auctex buffers.

Bests,
Hendrik


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------- Original Message -------
On Sunday, June 19th, 2022 at 11:24 PM, Hendrik Rommeswinkel 
<rommeswi@proton.me> wrote:


> Hi Arash,
> 

> Underlining text might be ugly but overlining in mathematics / formal logic 
> is quite common so it is a pity that the overline cannot be configured in 
> emacs to actually be useful.
> 

> The changes in the ulem.el file are quite straightforward (changing 'textual 
> to 'underline-command for the relevant functions) but writing a new soul.el 
> is currently beyond me. I presume most of the code in ulem.el is actually 
> doing package-relevant stuff and cannot just be copied?
> 

> modified style/ulem.el
> @@ -69,14 +69,15 @@
> ;; Tell font-lock about the update.
> (font-latex-add-keywords '(("useunder" "{{{"))
> 'function)
> + (font-latex-add-keywords '(("sout" "{")
> + ("xout" "{"))
> + 'textual)
> (font-latex-add-keywords '(("uline" "{")
> ("uuline" "{")
> ("uwave" "{")
> - ("sout" "{")
> - ("xout" "{")
> ("dashuline" "{")
> ("dotuline" "{"))
> - 'textual)))
> + 'underline-command)))
> TeX-dialect)
> 

> Bests,
> Hendrik
> 

> 

> Sent with Proton Mail secure email.
> ------- Original Message -------
> On Tuesday, June 14th, 2022 at 7:45 PM, Arash Esbati arash@gnu.org wrote:
> 

> 

> 

> > Hi Hendrik,
> > 

> > Hendrik Rommeswinkel via Discussion list for AUCTeX developers 
> > auctex-devel@gnu.org writes:
> > 

> > > I would like to suggest introducing fontification of the \underline
> > > command and variations thereof from the ulem and soul packages.
> > 

> > Thanks for your suggestion and the patch. In general, I think this is a
> > good addition while underlinig text in general is not ;-)
> > 

> > I have a minor comment below, though.
> > 

> > What do others think about this change? I also think this change is
> > small enough that we don't need to go through FSF paperwork.
> > 

> > > git diff origin/master master
> > > diff --git a/font-latex.el b/font-latex.el
> > > index 92b6047a..93ae9bb0 100644
> > > --- a/font-latex.el
> > > +++ b/font-latex.el
> > > @@ -431,6 +431,10 @@ variable `font-latex-fontify-sectioning'." ',num)
> > > ("italic-command"
> > > (("emph" "{") ("textit" "{") ("textsl" "{") ("mathit" "{"))
> > > font-latex-italic-face 1 command)
> > > + ("underline-command"
> > > + (("underline" "{") ("ul" "{") ("uuline" "{") ("uwave" "{") ("dotuline" 
> > > "{")
> > > + ("dashuline" "{"))
> > 

> > In font-latex, we only add keywords provided by vanilla LaTeX. Keywords
> > provided by packages go into the corresponding AUCTeX style file, in
> > this case style/ulem.el and style/soul.el (which has to written).
> > Hence, this becomes
> > 

> > (("underline" "{"))
> > 

> > Best, Arash

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