emacs-orgmode@gnu.org archives
 help / color / mirror / code / Atom feed
From: Matt Huszagh <huszaghmatt@gmail.com>
To: "emacs-orgmode@gnu.org" <emacs-orgmode@gnu.org>
Subject: Re: Patch to align baseline of latex fragments and surrounding text
Date: Sun, 10 Oct 2021 16:29:28 -0700	[thread overview]
Message-ID: <871r4sxxuv.fsf@gmail.com> (raw)
In-Reply-To: <874k9oxy48.fsf@gmail.com>

Matt Huszagh <huszaghmatt@gmail.com> writes:

> I've created a patch to align the baseline of latex image fragments to
> the surrounding text. The patch consists of several parts. First, it
> adds a customizable variable that can be set to a user supplied function
> to compute the value of :ascent passed to `overlay-put'. It can also be
> set to a symbol (e.g., 'center, which is the current setting and still
> the default), or an integer (:ascent can take an integer
> percentage). The patch also modifies `org--make-preview-overlay' to use
> this new variable.
>
> The other part of the patch is a new function that computes the correct
> value for :ascent from an SVG file.
>
> Unfortunately, this isn't a general-purpose solution to baseline text
> alignment. It currently only works with SVG images and requires that
> these SVG images encode the text baseline in the viewBox attribute (I've
> explained in the function documentation how to achieve this).
>
> I was not initially planning to include the function because it only
> works in certain special cases (though if you setup your SVG image
> generation as I've described in the documentation it should work
> correctly for all of your LaTeX fragments). However, I ultimately
> decided it was beneficial to include it for several reasons: (1) it
> would not be obvious for many users how to write this function on their
> own, (2) by including it, others can improve upon it, and (3) I tried to
> minimize corner cases by leaving the default value as 'center and having
> the function return 'center whenever it detects an incorrect :ascent
> value.

I should also mention that I've tested this for different image scaling
factors (`:image-size-adjust' in `org-preview-latex-process-alist') and
it works regardless of the scale factor. That is, the baseline will be
correctly aligned irrespective of the scale factor you set (though
obviously the text median
(https://en.wikipedia.org/wiki/Baseline_(typography))) will only match
the surrounding text for the correct scaling factor.

Matt


  reply	other threads:[~2021-10-10 23:30 UTC|newest]

Thread overview: 8+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-10-10 23:23 Matt Huszagh
2021-10-10 23:29 ` Matt Huszagh [this message]
2021-12-03  2:32   ` Matt Huszagh
2021-12-09 20:59     ` Sébastien Miquel
2021-12-09 22:18       ` Matt Huszagh
2021-12-10 15:49         ` Sébastien Miquel
2021-12-11  4:53           ` [Patch] Align " Matt Huszagh
2022-07-30  9:55             ` Ihor Radchenko

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

  List information: https://www.orgmode.org/

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=871r4sxxuv.fsf@gmail.com \
    --to=huszaghmatt@gmail.com \
    --cc=emacs-orgmode@gnu.org \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body.
Code repositories for project(s) associated with this public inbox

	https://git.savannah.gnu.org/cgit/emacs/org-mode.git

This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for read-only IMAP folder(s) and NNTP newsgroup(s).