texlive[71921] Master/texmf-dist: don't add spaces after LaTeX

[commits+karl at tug.org]

Revision: 71921
          https://tug.org/svn/texlive?view=revision&revision=71921
Author:   karl
Date:     2024-07-28 22:19:38 +0200 (Sun, 28 Jul 2024)
Log Message:
-----------
don't add spaces after LaTeX commands in MathJax, tex4ht r1540

Revision Links:
--------------
    https://tug.org/svn/texlive?view=revision&revision=1540

Modified Paths:
--------------
    trunk/Master/texmf-dist/source/generic/tex4ht/ChangeLog
    trunk/Master/texmf-dist/source/generic/tex4ht/tex4ht-mathjax.tex
    trunk/Master/texmf-dist/tex/generic/tex4ht/mathjax-latex-4ht.4ht

Modified: trunk/Master/texmf-dist/source/generic/tex4ht/ChangeLog
===================================================================
--- trunk/Master/texmf-dist/source/generic/tex4ht/ChangeLog	2024-07-28 20:11:05 UTC (rev 71920)
+++ trunk/Master/texmf-dist/source/generic/tex4ht/ChangeLog	2024-07-28 20:19:38 UTC (rev 71921)
@@ -1,3 +1,8 @@
+2024-07-28  Michal Hoftich  <michal.h21 at gmail.com>
+
+	* tex4ht-mathjax.tex (mathjax-latex-4ht.4ht): don't add spaces after
+	LaTeX commands.
+
 2024-07-26  Michal Hoftich  <michal.h21 at gmail.com>
 
 	* tex4ht-4ht.tex (tagpdf-hooks.4ht, tagpdf-base-hooks.4ht): removed

Modified: trunk/Master/texmf-dist/source/generic/tex4ht/tex4ht-mathjax.tex
===================================================================
--- trunk/Master/texmf-dist/source/generic/tex4ht/tex4ht-mathjax.tex	2024-07-28 20:11:05 UTC (rev 71920)
+++ trunk/Master/texmf-dist/source/generic/tex4ht/tex4ht-mathjax.tex	2024-07-28 20:19:38 UTC (rev 71921)
@@ -1,4 +1,4 @@
-% $Id: tex4ht-mathjax.tex 1474 2024-02-25 16:27:19Z karl $
+% $Id: tex4ht-mathjax.tex 1540 2024-07-28 17:10:17Z michal_h21 $
 % compile: latex tex4ht-mathjax
 %
 % Copyright 2018-2024 TeX Users Group
@@ -37,12 +37,14 @@
 \<required packages\><<<
 >>>
 
-The \verb|\alteqtoks| command saves the used command in HTML. It uses detokenize command
-to insert arguments verbatim. The side effect of this is that detokeize inserts space
+The \verb|\alteqtoks| command prints the used LaTeX math code to the output document in 
+verbatim. 
+
+In the past, we used \verb|\detokenize|. The side effect of this is that detokeize inserts space
 after each control sequence. This is completely valid TeX code, but earlier versions of
 MathJax didn't like that, rendering resulted in error.
 
-Fortunatelly, MathJax 3 supports these spaces, so we can remove regular expressions for space handling.
+Fortunatelly, MathJax 3 supports these spaces, so we could remove regular expressions for space handling.
 The original code was this:
 
 % % convert \ { to \:{ 
@@ -52,14 +54,24 @@
 % % replace \\:{ back to \\ { -- this can be introduced by the previous regex
 % \regex_replace_all:nnN { \x{5C} \x{5C}  \x{3A} \x{7B} } { \x{5C} \x{5C} \x{20} \x{7B} } \l_tmpa_tl
 
+Now (July 2024), when I researched another issue, I've found that it is actually possible to avoid these 
+extra spaces using LaTeX 3 commands. The inspiration comes from 
+\Link[https://tex.stackexchange.com/a/44444/2891]this Bruno Le Foch\EndLink.
+One ongoing issue is that newlines are not presented. But they weren't preserved with \verb|\detokenize|
+either, so it shouldn't be a problem.
 
-We still use regula expressions to escape invalid XML characters to entities, so it works only with LaTeX.
 
+We still use regular expressions to escape invalid XML characters to entities, so it works only with LaTeX.
+
 \<defined commands\><<<
 \ExplSyntaxOn
 \cs_new_protected:Npn \alteqtoks #1
 {
-  \tl_set:Ne \l_tmpa_tl {\detokenize{#1}}
+  % save tokens, but preserve spaces
+  % https://tex.stackexchange.com/a/44444/2891
+  \tl_set:Nn \l_tmpa_tl {#1}
+  \regex_replace_all:nnN { . } { \c{string} \0 } \l_tmpa_tl
+  \tl_set:Nx \l_tmpa_tl { \l_tmpa_tl }
   % % replace < > and & with xml entities
   \regex_replace_all:nnN { \x{26} } { & } \l_tmpa_tl
   \regex_replace_all:nnN { \x{3C} } { < } \l_tmpa_tl 

Modified: trunk/Master/texmf-dist/tex/generic/tex4ht/mathjax-latex-4ht.4ht
===================================================================
--- trunk/Master/texmf-dist/tex/generic/tex4ht/mathjax-latex-4ht.4ht	2024-07-28 20:11:05 UTC (rev 71920)
+++ trunk/Master/texmf-dist/tex/generic/tex4ht/mathjax-latex-4ht.4ht	2024-07-28 20:19:38 UTC (rev 71921)
@@ -1,4 +1,4 @@
-% mathjax-latex-4ht.4ht (2024-02-25-08:28), generated from tex4ht-mathjax.tex
+% mathjax-latex-4ht.4ht (2024-07-28-13:12), generated from tex4ht-mathjax.tex
 % Copyright 2018-2024 TeX Users Group
 %
 % This work may be distributed and/or modified under the
@@ -5,7 +5,7 @@
 % conditions of the LaTeX Project Public License, either
 % version 1.3c of this license or (at your option) any
 % later version. The latest version of this license is in
-%   http://www.latex-project.org/lppl.txt
+%   https://www.latex-project.org/lppl.txt
 % and version 1.3c or later is part of all distributions
 % of LaTeX version 2005/12/01 or later.
 %
@@ -12,17 +12,21 @@
 % This work has the LPPL maintenance status "maintained".
 %
 % The Current Maintainer of this work
-% is the TeX4ht Project <http://tug.org/tex4ht>.
+% is the TeX4ht Project <https://tug.org/tex4ht>.
 %
 % If you modify this program, changing the
 % version identification would be appreciated.
-\immediate\write-1{version 2024-02-25-08:28}
+\immediate\write-1{version 2024-07-28-13:12}
 
 
 \ExplSyntaxOn
 \cs_new_protected:Npn \alteqtoks #1
 {
-  \tl_set:Ne \l_tmpa_tl {\detokenize{#1}}
+  % save tokens, but preserve spaces
+  % https://tex.stackexchange.com/a/44444/2891
+  \tl_set:Nn \l_tmpa_tl {#1}
+  \regex_replace_all:nnN { . } { \c{string} \0 } \l_tmpa_tl
+  \tl_set:Nx \l_tmpa_tl { \l_tmpa_tl }
   % % replace < > and & with xml entities
   \regex_replace_all:nnN { \x{26} } { & } \l_tmpa_tl
   \regex_replace_all:nnN { \x{3C} } { < } \l_tmpa_tl
@@ -217,6 +221,18 @@
 
 
 
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