Re: pandoc correctly translates U+2024 thin space to '\,' but the spaces in PDF created by Xelatex are full-width

[John MacFarlane <jgm-TVLZxgkOlNX2fBVCVOL8/A@public.gmane.org>]

The conditionals just mean that babel is used with pdflatex
and polyglossia with xelatex and lualatex.

maybe there's an option we could/should be passing to
polyglossia?  Check the documentation?

Chris Jones <cjns1989-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> writes:

> I replaced these lines in the intermediate latex file generated by pandoc:
>
> `\ifnum 0\ifxetex 1\fi\ifluatex 1\fi=0 % if pdftex
>   \usepackage[shorthands=off,
> main=french]{babel}
> \else
>   % load polyglossia as late as possible as it *could* call bidi if RTL 
> lang (e.g. Hebrew or Arabic)
>   \usepackage{polyglossia}
>   \setmainlanguage[]{french}
> \fi`
>
> by…
>
> `\usepackage[french]{babel}`
>
> … and that took care of the problem.
>
> So it looks like it's either a bug in the panglossia package or misuse 
> thereof by pandoc?
>
> Not sure where to go from there since I don't understand what the if/else & 
> conditionals are meant to do.
>
> Thanks,
>
> CJ
>
> On Saturday, February 1, 2020 at 2:18:30 PM UTC-5, Chris Jones wrote:
>>
>> Searched online for similar cases and didn't find anything relevant.
>>
>> The context is that I recently was made aware that the French insist that 
>> a *thin space* be inserted immediately before some punctuation characters 
>> *',:!?»%*' etc.… So in dialogs for instance e.g. … the .md source has: « 
>> · bonjour mademoiselle · » where the middle dots represent a single U+202f 
>> non-breaking space.
>>
>> When I take a look at the intermediate .tex file that pandoc generates the 
>> thin spaces are correctly converted to '\,' which I believe is the *latex 
>> way *of coding thin spaces. But when I run xelatex on the latex file and 
>> look at the resulting PDF I can see that the thin spaces have become 
>> regular-width spaces. 
>>
>> I compared the PDF output to another PDF I had created using plain latex 
>> rather than pandoc and the U+202F's that I typed in my .tex source clearly 
>> materialize as thin spaces in the PDF.  
>>
>> What I suspect at this point is that one of the latex packages that pandoc 
>> sticks in the generated latex file (or the way it is invoked? perhaps a 
>> combination of packages? …?) is causing this.
>>
>> As to an *MWE*… I'm not sure it's really appropriate in this particular 
>> case…
>>
>> *Just in case… here's what I get from a minimal .md input file:*
>>
>> `\PassOptionsToPackage{unicode=true}{hyperref} % options for packages 
>> loaded elsewhere
>> \PassOptionsToPackage{hyphens}{url}
>> %
>> \documentclass[oneside,10pt,french,]{extbook} % cjns1989 - 27112019 - 
>> added the oneside option: so that the text doesn't jump left & right when 
>> reading on a tablet/ereader
>> \usepackage{lmodern}
>> \usepackage{amssymb,amsmath}
>> \usepackage{ifxetex,ifluatex}
>> \usepackage{fixltx2e} % provides \textsubscript
>> \ifnum 0\ifxetex 1\fi\ifluatex 1\fi=0 % if pdftex
>>   \usepackage[T1]{fontenc}
>>   \usepackage[utf8]{inputenc}
>>   \usepackage{textcomp} % provides euro and other symbols
>> \else % if luatex or xelatex
>>   \usepackage{unicode-math}
>>   \defaultfontfeatures{Ligatures=TeX,Scale=MatchLowercase}
>> %   \setmainfont[]{EBGaramond-Regular}
>>     \setmainfont[Numbers={OldStyle,Proportional}]{EBGaramond-Regular}      
>> % cjns1989 - 20191129 - old style numbers 
>> \fi
>> % use upquote if available, for straight quotes in verbatim environments
>> \IfFileExists{upquote.sty}{\usepackage{upquote}}{}
>> % use microtype if available
>> \IfFileExists{microtype.sty}{%
>> \usepackage[]{microtype}
>> \UseMicrotypeSet[protrusion]{basicmath} % disable protrusion for tt fonts
>> }{}
>> \usepackage{hyperref}
>> \hypersetup{
>>             pdftitle={WME},
>>             pdfborder={0 0 0},
>>             breaklinks=true}
>> \urlstyle{same}  % don't use monospace font for urls
>> \usepackage[papersize={3.75 in, 6.0 in},left=.3 in,right=.3 in]{geometry}
>> \setlength{\emergencystretch}{3em}  % prevent overfull lines
>> \providecommand{\tightlist}{%
>>   \setlength{\itemsep}{0pt}\setlength{\parskip}{0pt}}
>> \setcounter{secnumdepth}{0}
>> % Redefines (sub)paragraphs to behave more like sections
>> \ifx\paragraph\undefined\else
>> \let\oldparagraph\paragraph
>> \renewcommand{\paragraph}[1]{\oldparagraph{#1}\mbox{}}
>> \fi
>> \ifx\subparagraph\undefined\else
>> \let\oldsubparagraph\subparagraph
>> \renewcommand{\subparagraph}[1]{\oldsubparagraph{#1}\mbox{}}
>> \fi
>> % set default figure placement to htbp
>> \makeatletter
>> \def\fps@figure{htbp}
>> \makeatother
>>
>> \ifnum 0\ifxetex 1\fi\ifluatex 1\fi=0 % if pdftex
>>   \usepackage[shorthands=off,main=french]{babel}
>> \else
>>   % load polyglossia as late as possible as it *could* call bidi if RTL 
>> lang (e.g. Hebrew or Arabic)
>>   \usepackage{polyglossia}
>>   \setmainlanguage[]{french}
>> \fi
>>
>> \title{WME}
>> \date{}
>>
>> \begin{document}
>> \maketitle
>>
>> \$ ECM
>>
>> \hypertarget{wme-title}{%
>> \chapter{WME (title)}\label{wme-title}}
>>
>> en lettres capitales, soigneusement imprimées au pochoir\,:
>>
>> --- «\,Crétins\,!\,» murmura-t-il.
>>
>> \end{document}`
>>
>> *Customization* is minimal: old style numbers (proportional) and 
>> one-sided since the document is not destined for hard-copy printing…
>>
>> What I have in mind at this point to try and figure out what is happening 
>> is to work with a one line .md source that has some U+202F's and remove 
>> default packages until the problem goes away but before I do this I thought 
>> maybe someone has run into something similar or might suggest a better 
>> approach than plain trial and error to help determine the cause of the 
>> problem.
>>
>> Thoughts?
>>
>> Thanks,
>>
>> CJ
>>
>>
>
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