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From "Itai Shaked (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (PDFBOX-4402) Write RTL text in reversed order
Date Tue, 11 Dec 2018 09:09:00 GMT

    [ https://issues.apache.org/jira/browse/PDFBOX-4402?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16716600#comment-16716600
] 

Itai Shaked commented on PDFBOX-4402:
-------------------------------------

I have not tried it, although in theory it should work but only for the most simple cases
(i.e. a single RTL language with no hyphenation and other languages mixed in).   

For more complex cases there is probably no alternative to using an implementation of the
Unicode BiDi algorithm, which is quite complicated but works well (or at least - is consistent
with most current software). You can try using [ICU4J|http://icu-project.org/apiref/icu4j/com/ibm/icu/text/Bidi.html] assuming
you want a Java solution. 

 

Even with such solutions existing it may be beneficial to (at some point in the future) support
RTL internally in PDFBox, as strings in files thus created will be reversed, so users opening
the PDF in a viewer will have to search for the string םולש whenever they want to find
שלום etc. 

> Write RTL text in reversed order
> --------------------------------
>
>                 Key: PDFBOX-4402
>                 URL: https://issues.apache.org/jira/browse/PDFBOX-4402
>             Project: PDFBox
>          Issue Type: Bug
>    Affects Versions: 2.0.13
>            Reporter: steve neo
>            Priority: Major
>              Labels: RTL
>         Attachments: Screen Shot 2018-12-10 at 2.03.46 pm.png
>
>
> I use PDPageContentStream.showText() to write string to PDF.  It doesn't work for RTL
text, for example Hebrew, all text are written in reversed order.  See attached example screenshot. 



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