Re: Removing horizontal space in latex fragments

[Matt Huszagh <huszaghmatt@gmail.com>]

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Nicolas Goaziou <mail@nicolasgoaziou.fr> writes:

> So, has anyone settled on which one to apply?

My vote goes for keeping the newlines to improve readability in the
generated tex file. But, again, I'm more than happy to be overuled.

> Minor nitpick:
>
>   (if (string-suffix-p string "\n") ...)
>
> is slightly less low-level.

Appreciate the nitpick; your version is better!

I've attached an updated patch.

Best,
Matt


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From bdb93a13a43d90ad6e66449797111e836a67a219 Mon Sep 17 00:00:00 2001
From: Matt Huszagh <huszaghmatt@gmail.com>
Date: Thu, 5 Dec 2019 23:25:32 -0800
Subject: [PATCH] org.el: Remove leading/trailing whitespace from latex
 fragment

* lisp/org.el (org-create-formula-image): Ensure user input ends
with a % character to remove trailing whitespace. Also, add %
characters between macros and newlines purely visual.
---
 lisp/org.el | 11 ++++++++---
 1 file changed, 8 insertions(+), 3 deletions(-)

diff --git a/lisp/org.el b/lisp/org.el
index 9b84592ba..ae686e330 100644
--- a/lisp/org.el
+++ b/lisp/org.el
@@ -16554,12 +16554,17 @@ a HTML file."
 	(setq bg (org-latex-color :background))
       (setq bg (org-latex-color-format
 		(if (string= bg "Transparent") "white" bg))))
+    ;; remove tex \par at end of snippet to avoid trailing
+    ;; whitespace
+    (if (string-suffix-p string "\n")
+        (aset string (- (length string) 1) ?%)
+      (setq string (concat string "%")))
     (with-temp-file texfile
       (insert latex-header)
       (insert "\n\\begin{document}\n"
-	      "\\definecolor{fg}{rgb}{" fg "}\n"
-	      "\\definecolor{bg}{rgb}{" bg "}\n"
-	      "\n\\pagecolor{bg}\n"
+	      "\\definecolor{fg}{rgb}{" fg "}%\n"
+	      "\\definecolor{bg}{rgb}{" bg "}%\n"
+	      "\n\\pagecolor{bg}%\n"
 	      "\n{\\color{fg}\n"
 	      string
 	      "\n}\n"
--
2.24.0