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https://issues.apache.org/jira/browse/PDFBOX-2252?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14906440#comment-14906440
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Maruan Sahyoun commented on PDFBOX-2252:
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[~AndreasMeier] sorry for all the question given the fact you already put so
much effort into the patch. Would it be possible to
- generate a set of sample files and unit test to confirm the current issue
- verify how that has been resolved by the patch
I would like to put in some time to verify if the java classes could be used as
a replacement of some of the custom code. E.g. {{Character.isMirrored()}} might
be used instead of the custom code/pattern (we'd still need to use the
BidiMirroring properties as there is no method to get the corresponding char in
the standard classes). That might be done in a second step but there the unit
tests are important in order to make sure nothing breaks.
> PDFTextStripper has problem with documents with mixed language directions
> -------------------------------------------------------------------------
>
> Key: PDFBOX-2252
> URL: https://issues.apache.org/jira/browse/PDFBOX-2252
> Project: PDFBox
> Issue Type: Bug
> Components: Text extraction
> Affects Versions: 1.8.6, 2.0.0
> Reporter: Amir
> Assignee: Maruan Sahyoun
> Priority: Critical
> Fix For: 2.1.0
>
> Attachments: BidiMirroring.txt, PDFTextStripper.java.patch,
> PDFTextStripper.java.patch, atest.pdf, overlap.jpg, test.pdf,
> wikipedia_dl_lyric_test.pdf
>
>
> When the input document of PDFTextStripper is a combination of right-to-left
> and left-to-right languages, the output characters of one language is
> reversed.
> A sample bilingual pdf document is attached.
> PDFTextStripper has a variable "isRtlDominant" in "writePage" function, which
> is defined as follows: boolean isRtlDominant = rtlCount > ltrCount;
> This class clearly count the number of rtl characters and decide if the whole
> content should be revered or not. It's not true, it must operate on each
> word, not the whole document.
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