Re: [PATCH] ox-latex.el: Fix the case of latex-caption-above t

[Mads Bach Villadsen]

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My message seems to have been HTML-ified by mistake, so I'm 
sending it again.

The documentation for `org-latex-caption-above’ seems to imply 
that it can be set to a non-nil value to always place captions at 
the start of environments, instead of the end. However, with a 
non-nil value which is not a sequence, exporting something like 
the following from org causes an error:
\begin{align*}
x
\end{align*}

The issue is that in `org-latex-latex-environment’, in the 
expression
  (memq type (append (plist-get info :latex-caption-above) 
  ’(math)))))
the first argument to `append’ gets expanded to the value of 
`org-latex-caption-above’ (at least for this example), which may 
not be a sequence.

I think the attached patch fixes this, but I don’t write much 
lisp, so maybe there’s a better way to handle this.

Best,
Mads


>From f28da9e3c80f03d70a9a6eced5029e12fc75ab99 Mon Sep 17 00:00:00 
2001
From: Mads Bach Villadsen <mbvilladsen@pm.me>
Date: Mon, 15 Jan 2024 15:37:29 -0500
Subject: [PATCH] ox-latex.el: Fix the case of latex-caption-above 
t

* lisp/ox-latex.el: (org-latex-latex-environment): Check whether 
  the property
`:latex-caption-above' is a sequence or not, and handle them 
separately.

Correctly handle the case where org-latex-caption-above is non-nil 
and
not a list of symbols. The documentation of 
org-latex-caption-above
implies that it can be set to a non-nil value to place captions at 
the
beginning of all environments.

TINYCHANGE
---
 lisp/ox-latex.el | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/lisp/ox-latex.el b/lisp/ox-latex.el
index b36c46f13..4f2a94a20 100644
--- a/lisp/ox-latex.el
+++ b/lisp/ox-latex.el
@@ -2682,7 +2682,9 @@ CONTENTS is nil.  INFO is a plist holding 
contextual information."
                        (org-latex--label latex-environment info nil t)
                      (org-latex--caption/label-string latex-environment 
 info)))
           (caption-above-p
-           (memq type (append (plist-get info :latex-caption-above) 
         '(math)))))
+            (let ((latex-caption-above (plist-get info 
:latex-caption-above)))
+              (if (sequencep latex-caption-above) (memq type 
(append latex-caption-above '(math)))
+                latex-caption-above))))
       (if (not (or (org-element-property :name latex-environment)
                   (org-element-property :caption latex-environment)))
          value
--
2.39.3 (Apple Git-145)



--citation follows this line (read-only)--
Mads Bach Villadsen <mbvilladsen@pm.me> writes:

Hi,

The documentation for `org-latex-caption-above’ seems to imply 
that it can be set to a non-nil value to always place captions at 
the start of
environments, instead of the end. However, with a non-nil value 
which is not a sequence, exporting something like the following 
from org causes
an error:

latexpCfhTz_350451aa2511e1a6f5ea1cf164b4329f062726cb.png

The issue is that in `org-latex-latex-environment’, in the 
expression (memq type (append (plist-get info 
:latex-caption-above) ’(math))))) the first
argument to `append’ gets expanded to the value of 
`org-latex-caption-above’ (at least for this example), which may 
not be a sequence.

I think the attached patch fixes this, but I don’t write much 
lisp, so maybe there’s a better way to handle this.

Best, Mads

>From f28da9e3c80f03d70a9a6eced5029e12fc75ab99 Mon Sep 17 00:00:00 
2001 From: Mads Bach Villadsen <mbvilladsen@pm.me> Date: Mon,
15 Jan 2024 15:37:29 -0500 Subject: [PATCH] ox-latex.el: Fix the 
case of latex-caption-above t

lisp/ox-latex.el: (org-latex-latex-environment): Check whether the 
property

`:latex-caption-above’ is a sequence or not, and handle them 
separately.

Correctly handle the case where org-latex-caption-above is non-nil 
and not a list of symbols. The documentation of 
org-latex-caption-above implies
that it can be set to a non-nil value to place captions at the 
beginning of all environments.

TINYCHANGE — lisp/ox-latex.el | 4 +- 1 file changed, 3 
insertions(+), 1 deletion(-)

diff –git a/lisp/ox-latex.el b/lisp/ox-latex.el index 
b36c46f13..4f2a94a20 100644 — a/lisp/ox-latex.el + 
b/lisp/ox-latex.el @@ -2682,7 +2682,9 @@
CONTENTS is nil. INFO is a plist holding contextual information.“ 
(org-latex–label latex-environment info nil t) 
(org-latex–caption/label-string
latex-environment info))) (caption-above-p

,* (memq type (append (plist-get info :latex-caption-above) 
’(math)))))
,* (let ((latex-caption-above (plist-get info 
:latex-caption-above)))
,* (if (sequencep latex-caption-above) (memq type (append 
latex-caption-above ’(math)))
,* latex-caption-above)))) (if (not (or (org-element-property 
:name latex-environment) (org-element-property :caption 
latex-environment))) value

– 2.39.3 (Apple Git-145)