Re: [Pre-PATCH] Overhaul of the LaTeX preview system

[Jun Inoue <jun.lambda@gmail.com>]

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Hello Timothy, I love what you and Karthink have done here!  Typesetting is
so much faster now!  And the little nuggets like error reporting and
intelligent sizing & coloring is so going to boost my org QoL.  Thank you
so much for your work!

I've been trying this on and off for a few days now, and it works really
well, except for one thing.  I'm using XeLaTeX, and whenever I typeset a
LaTeX fragment containing a letter that sticks below the baseline (g, j, y,
etc), the fragment is typeset too small, almost like subscripts.  It
reproduces when this is the only setting I have:

(use-package org
    :ensure nil
    :custom
    (org-latex-compiler "xelatex") ;; drop this line and the issue goes away
)

Minimal 1-line org file to trigger the bug:
abc $d$ $y$ -- the y is typeset too small compared to abc.  The d is just
the right size.

You mention in a separate email that XeLaTeX is known to cause hassles, but
is this one of them?  I could migrate to PDFLaTeX, but I'd lose the
convenience of editing with unicode-math.

On Sun, Mar 12, 2023 at 9:35 PM Timothy <orgmode@tec.tecosaur.net> wrote:

> Hi All,
>
> After months of work, Karthink and I have prepared a rather large patch-set
> completely overhauling the LaTeX preview system. I hope to have a patch set
> shortly, but in the mean time it would be good to get some more people
> testing
> this.
>
> To test this feature, please check out the `dev' branch of
> <https://git.tecosaur.net/tec/org-mode.git> (it’s the default branch).
> There are
> also some other changes there currently, but I don’t think anything is
> broken.
>
> You can view the almost-ready path set/diff here:
> <https://git.tecosaur.net/tec/org-mode/compare/c8401d2f..6d60738>, see the
> ORG-NEWS and org-manual entries to get a bit more of an idea of what’s
> changed.
> The short version is that now:
> • Previews are generated in bulk, and hundreds of LaTeX fragments can be
> processed per second.
> • Images are placed continuously as they are generated.
> • Preview generation is asynchronous and will not block Emacs.
> • Inline previews are aligned and scaled to match the font baseline and
> size.
> • Previews scale along with text when the text scale is changed.
> • Previews are coloured to match surrounding text and the active theme.
> • SVG previews automatically change colors when the active theme changes.
> • Error encountered when compiling LaTeX fragments can be accessed by
> mousing over preview images.
> • Preview overlays can hide and show themselves dynamically based on
> cursor position.
> • Org mode can auto-generate LaTeX previews as you type or edit the text
> of existing ones.
> • Org mode can keep equation numbering consistent by regenerating previews
> as needed.
>
> If you do come across any issues, please let me know either in a reply
> here or
> the org-mode matrix room. If you could also run
> <https://gist.github.com/karthink/0ac48411a81459c0f3fd7557c4e817db> and
> share the
> diagnostic info, that would be quite helpful.
>
> Lastly, Karthink has prepared a video giving an overview of the new
> capabilities, you can give it a watch here:
> <https://www.youtube.com/watch?v=n-AfvuV-bYo>
>
> All the best,
> Timothy
>
> --
> Timothy (‘tecosaur’/‘TEC’), Org mode contributor.
> Learn more about Org mode at <https://orgmode.org/>.
> Support Org development at <https://liberapay.com/org-mode>,
> or support my work at <https://liberapay.com/tec>.
>


-- 
Jun Inoue

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