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From: Wolfgang Schuster via ntg-context <ntg-context@ntg.nl>
Newsgroups: gmane.comp.tex.context
Subject: Re: XML, dealing with whitespace
Date: Sat, 15 Jan 2022 20:28:00 +0100
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Denis Maier via ntg-context schrieb am 15.01.2022 um 13:04:
>
> Hi all,
>
> I have sources that look like this:
>
> %%%%%%%%%%%%%%%%%%%%%
>
> <?xml version="1.0" encoding="UTF-8"?>
>
> <article>
>
>    <p>Bla Bla Bla</p>
>
> <p>
>
>       <underline>
>
>          <italic>Bla</italic>
>
>       </underline>, Bla Bla.</p>
>
> </article>
>
> %%%%%%%%%%%%%%%%%%%%%
>
> Typesetting this with context gives me a spurious space after the 
> underlined Bla in italics.
>

There is no spurious space, the line break is just converted to a space 
and I see no reason why this shouldn't happen. To remove space before or 
after certain parts of text within a paragraph you can use the 
\removeunwantedspace and \ignorespaces commands.

%%%% begin example
\starttexdefinition RemovePreceding #1
     \removeunwantedspaces
     #1
\stoptexdefinition

\starttexdefinition RemoveFollowing #1
     #1
     \ignorespaces
\stoptexdefinition

\starttext

Bla \RemovePreceding{Bla} Bla

Bla \RemoveFollowing{Bla} Bla

\stoptext
%%%% end example

When only  following spaces are a problem a better alternative to 
\ignorespace is \autoinsertnextspace which checks the following token 
which ensures there is space when the next character is punctuation.

%%%% begin example
\starttexdefinition Italic #1
     \emphasized{#1}
     \autoinsertnextspace
\stoptexdefinition

\starttexdefinition Underbar #1
     \underbar{#1}
\stoptexdefinition

\starttext

Bla Bla Bla

\Underbar{\Italic{Bla} , Bla Bla.}

\stoptext
%%%% end example

Wolfgang


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<html theme="default-light" iconset="color"><head>
<meta http-equiv="Content-Type" content="text/html; 
charset=windows-1252">
</head><body text="#000000"><span>Denis Maier via ntg-context schrieb am
 15.01.2022 um 13:04:</span><br>
<blockquote type="cite" 
cite="mid:02468648b859479c9f5bbcce7001e88b@unibe.ch" 
style="word-wrap:break-word">
  <meta http-equiv="Content-Type" content="text/html; 
charset=windows-1252">

  <meta name="Generator" content="Microsoft Word 15 (filtered medium)">

  <style><!--
/* Font Definitions */
@font-face
	{font-family:"Cambria Math";
	panose-1:2 4 5 3 5 4 6 3 2 4;}
@font-face
	{font-family:Calibri;
	panose-1:2 15 5 2 2 2 4 3 2 4;}
/* Style Definitions */
p.MsoNormal, li.MsoNormal, div.MsoNormal
	{margin:0cm;
	font-size:11.0pt;
	font-family:"Calibri",sans-serif;
	mso-fareast-language:EN-US;}
a:link, span.MsoHyperlink
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	color:#0563C1;
	text-decoration:underline;}
.MsoChpDefault
	{mso-style-type:export-only;
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	margin:70.85pt 70.85pt 2.0cm 70.85pt;}
div.WordSection1
	{page:WordSection1;}
--></style><!--[if gte mso 9]><xml>
<o:shapedefaults v:ext="edit" spidmax="1026" />
</xml><![endif]--><!--[if gte mso 9]><xml>
<o:shapelayout v:ext="edit">
<o:idmap v:ext="edit" data="1" />
</o:shapelayout></xml><![endif]-->


  <div class="WordSection1">
<p class="MsoNormal">Hi all,<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><span lang="FR-CH">I have sources that look like 
this:<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="FR-CH"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="FR-CH">%%%%%%%%%%%%%%%%%%%%%<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="FR-CH">&lt;?xml version="1.0" 
encoding="UTF-8"?&gt;<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="FR-CH">&lt;article&gt;<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="FR-CH">   &lt;p&gt;Bla Bla 
Bla&lt;/p&gt;<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="FR-CH">   </span>&lt;p&gt;<o:p></o:p></p>
<p class="MsoNormal">      &lt;underline&gt;<o:p></o:p></p>
<p class="MsoNormal">         &lt;italic&gt;Bla&lt;/italic&gt;<o:p></o:p></p>
<p class="MsoNormal">      &lt;/underline&gt;, Bla Bla.&lt;/p&gt;<o:p></o:p></p>
<p class="MsoNormal"><span lang="FR-CH">&lt;/article&gt;<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="FR-CH">%%%%%%%%%%%%%%%%%%%%%<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="FR-CH"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="FR-CH">Typesetting this with context 
gives me a spurious space after the underlined Bla in italics.<o:p></o:p></span></p></div>
</blockquote>
<br>
There is no spurious space, the line break is just converted to a space 
and I see no reason why this shouldn't happen. To remove space before or
 after certain parts of text within a paragraph you can use the 
\removeunwantedspace and \ignorespaces commands.<br>
<br>
%%%% begin example<br>
\starttexdefinition RemovePreceding #1<br>
    \removeunwantedspaces<br>
    #1<br>
\stoptexdefinition<br>
<br>
\starttexdefinition RemoveFollowing #1<br>
    #1<br>
    \ignorespaces<br>
\stoptexdefinition<br>
<br>
\starttext<br>
<br>
Bla \RemovePreceding{Bla} Bla<br>
<br>
Bla \RemoveFollowing{Bla} Bla<br>
<br>
\stoptext<br>
%%%% end example<br>
<br>
When only  following spaces are a problem a better alternative to 
\ignorespace is \autoinsertnextspace which checks the following token 
which ensures there is space when the next character is punctuation.<br>
<br>
%%%% begin example<br>
\starttexdefinition Italic #1<br>
    \emphasized{#1}<br>
    \autoinsertnextspace<br>
\stoptexdefinition<br>
<br>
\starttexdefinition Underbar #1<br>
    \underbar{#1}<br>
\stoptexdefinition<br>
<br>
\starttext<br>
<br>
Bla Bla Bla<br>
<br>
\Underbar{\Italic{Bla} , Bla Bla.}<br>
<br>
\stoptext<br>
%%%% end example<br>
<br>
Wolfgang<br>
<br>
</body></html>

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