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From: Thangalin via ntg-context <ntg-context@ntg.nl>
To: Mailing list for ConTeXt users <ntg-context@ntg.nl>
Cc: Thangalin <thangalin@gmail.com>
Subject: Re: Typesetting unicode characters
Date: Thu, 31 Mar 2022 01:06:27 -0700	[thread overview]
Message-ID: <CAANrE7rQGFeOqZN7dkX3TPbaYGQSWo=+Wb7gef8wFhwhj7t+Bg@mail.gmail.com> (raw)
In-Reply-To: <YkQLQ1t5oQa9/HSy@phare.normalesup.org>


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On the rare chance that someone else stumbles across this problem ...

By default, Java's Xalan transformer for creating XML documents does not
correctly encode emojis. Instead of &#x1F44D; for the thumbs up emoji,
Xalan encodes it as &#55357;&#56397;. As Arthur pointed out, this is not a
valid entity encoding.

One solution is to use Saxonica's Saxon 11 transformer, which produces the
expected output:

  <html>
    <head><meta charset="utf8"/></head>
    <body>
      <p id="caret">the 👍 emoji</p>
    </body>
  </html>

In Java, switching to Saxon entails installing the Jar files for Saxonica
and its resolvers. Then set the system property before invoking the XML
transformer: System.setProperty( "javax.xml.transform.TransformerFactory",
"net.sf.saxon.TransformerFactoryImpl" );

ConTeXt handles the emoji from the transformed XML file without any issues.

Thank you, Arthur.

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      reply	other threads:[~2022-03-31  8:06 UTC|newest]

Thread overview: 3+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2022-03-30  7:32 Thangalin via ntg-context
2022-03-30  7:48 ` Arthur Rosendahl via ntg-context
2022-03-31  8:06   ` Thangalin via ntg-context [this message]

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