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https://issues.apache.org/jira/browse/PDFBOX-2252?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14910177#comment-14910177
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Maruan Sahyoun commented on PDFBOX-2252:
----------------------------------------
thx - but the credit goes to you. I was only enhancing it a little using the
Bidi classes. I've committed the code as is - some further refinements are
needed.
{quote}
Furthermore it would be nice to know your opinion about document layout
analysis programs. Is something planned in that direction?
{quote}
If the input file has article information then this will be respected
(optional). If there is no such information there are currently no plans for
something like document layout analysis. I came across some projects in the
past which are doing this on a PDF basis. Might be usable as a starting point.
> 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, IsMirroredDeviations.txt,
> PDFTextStripper-201709271718.patch, PDFTextStripper-201709272018.patch,
> PDFTextStripper.java.patch, PDFTextStripper.java.patch, atest.pdf,
> bugzilla867751.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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