[XeTeX] Fake italics for some characters only

[BPJ]

@Zdenek, the point is that other characters inside `\textit` should be real
italics. I at least have tried it using a macro around the "culprit"
characters and I think it looks better than fake italics throughout, which
looks really bad (shades of low-budget publications from the early
eighties! :-). Anyway I'm working on a solution in my head which I'll try
when I get back to my desktop. I think I'll try to use a boolean which I
set/unset at the start/end of my "`\mytextit` and a single macro for the
active characters which checks this boolean. I have no idea yet if it will
work, but it seems the semantically cleanest way to do it to my mind.

/bpj

ons 5 dec. 2018 kl. 10:53 skrev Zdenek Wagner <zdenek.wagner at gmail.com>:

> Hi,
>
> I am afraid that I do not understand why to make only 4 FakeSlant
> characters instead of a FakeSlant font. Does it mean that other
> characters will remain upright inside \textit?
>
> Anyway, making a few characters active for \textit is quite simple.
> Let's suppose that A and B should be active. You then define:
>
> \def\mytextit{\begingroup \catcode`\A=13 \catcode`\B=13 \dotextit}
> \def\dotextit#1{\textit{#1}\endgroup}
>
> You will then call \mytextit{Test of A and B}
>
> Zdeněk Wagner
> http://ttsm.icpf.cas.cz/team/wagner.shtml
> http://icebearsoft.euweb.cz
>
> st 5. 12. 2018 v 5:51 odesílatel Alan Munn <amunn at gmx.com> napsal:
> >
> > Can you provide a bit more detail? Maybe a small example document?
> >
> > Alan
> >
> >
> > Benct Philip Jonsson wrote:
> > > I have a somewhat unusual problem. In a document produced using
> > > XeLaTeX I need to use four Unicode letters with scarce font support in
> > > italicized words and passages but the font which I have to use
> > > supports these characters only in roman. The obvious solution is to
> > > use the FakeSlant feature of fontspec but I don’t want to enclose
> > > these characters in a command argument, in the hope that a future
> > > version of the document can use an italic font which supports these
> > > characters, but neither do I (perhaps needless to say) want to use
> > > fake italics except for these four characters. In other words I would
> > > like to perform some kind of “keyhole surgery” in the preamble and use
> > > these characters normally in the body of the document, which I guess
> > > means having to make them active and somehow detect when they are
> > > inside the argument of `\textit`. (Note: it is appropriate to use
> > > `\textit` rather than `\emph` here because the purpose of the
> > > italicization is to mark text as being in an object language in a
> > > linguistic text.) Is that at all possible? I guess I could wrap
> > > `\textit` in a macro which locally redefines the active characters,
> > > but I’m not sure how to do that, nor how to access the glyphs
> > > corresponding to the characters once the characters are active. I am a
> > > user who isn’t afraid of using and making the most of various packages
> > > or of writing an occasional custom command to wrap up some repeatedly
> > > needed operation, but I am no expert. I am aware of all the arguments
> > > against fake italics — that is why I want to limit the damage as much
> > > as possible! — but I have no choice here. Waiting for the/an
> > > appropriate font to include italic versions of these characters is not
> > > an option at the moment.
> > >
> > > /Benct
> > >
> > >
> > >
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