Re: How to use "smart kerning" font features in Emacs using composition-function-table

[Yuan Fu]

On 11/28/23 6:20 AM, Eli Zaretskii wrote:
> > Date: Mon, 27 Nov 2023 21:18:18 -0800
> > From: Yuan Fu <casouri@gmail.com>
> >
> >
> >
> > On 11/27/23 4:03 AM, Eli Zaretskii wrote:
> > > > From: Steve Molitor <stevemolitor@gmail.com>
> > > > Date: Sun, 26 Nov 2023 14:42:36 -0600
> > > > Cc: emacs-devel@gnu.org
> > > >
> > > > For ligature support, I do need something like this for Commit Mono:
> > > >
> > > >       (set-char-table-range
> > > >        composition-function-table
> > > >        t
> > > >        `([" [,-.:;A-Z_a-z><=!&|+-?/\\]+" 0 font-shape-gstring]))
> > > Beware: composition-function-table is global, so the above will ligate
> > > characters on the mode line as well, which might not be what you want.
> > Is there any way to make it local? If I make composition-function-table
> > buffer-local and set the buffer-local variable, would it work?
> It will work to affect compositions when the buffer is the current
> one, but it will not work to avoid compositions on the mode line of
> the window(s) which display(s) that buffer.
Cool!
> > The use-case I'm thinking about is using Commit Mono for Info
> > buffers and help buffers, which have large bodies of monospaced
> > text. The improved readability would help a lot there.
> I think if you like these features enough, you should want it in any
> major mode that displays human-readable text.  But that's me.

I tend to you variable width fonts for human-readable text whenever 
possible. But for Info and help buffers, very often the content relies 
on monospacing for text layout. So I can't use variables-width font for 
those.

Yuan