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https://issues.apache.org/jira/browse/PDFBOX-2377?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14228889#comment-14228889
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Andreas Lehmkühler commented on PDFBOX-2377:
--------------------------------------------
I guess I've found a solution for the 1.8-branch. First of all I've reverted my
former changes.
The problem is that the pdf doesn't provide any mapping (neither an encoding
nor a toUnicode mapping) so that we have to decide where to get a suitable
mapping ourselves. The former code uses the internal font encoding in such
cases as fallback solution. But that doesn't work in every case (see
PDFBOX-2247). It looks like it depends on the existence of a charset within the
font descriptor. We can rely on the internal mapping if a charset is defined,
otherwise we just map the byte(s) to a string.
IMHO we have to adapt that solution for the trunk as well.
> Apparent regression in character mapping in a few files from govdocs1
> ---------------------------------------------------------------------
>
> Key: PDFBOX-2377
> URL: https://issues.apache.org/jira/browse/PDFBOX-2377
> Project: PDFBox
> Issue Type: Bug
> Components: Text extraction
> Affects Versions: 1.8.7, 2.0.0
> Reporter: Tim Allison
> Assignee: Andreas Lehmkühler
> Priority: Minor
> Labels: regression
> Fix For: 1.8.8, 2.0.0
>
> Attachments: 290991-6.txt, 290991-7.txt, 290991-8.txt, 290991.pdf,
> 312888.pdf, 357094-1.8.6.txt, 357094-1.8.8.txt, 357094.pdf, 764929.pdf,
> PDFBOX2247-701542.pdf
>
>
> On a small number of test files in a 50k sample of pdfs from govdocs1, it
> appears that some characters are no longer being extracted correctly in 1.8.7
> when compared to 1.8.6. I ran pdfbox's app.jar with ExtractText
> {noformat}
> 764929.pdf
> 1.8.6: Lang, Astrophysical Data: Planets and Stars
> 1.8.7: Lang, AefdaphyeiUSl DSfS: PlSnefe Snd EfSde,
> {noformat}
> and
> {noformat}
> 312888.pdf
> 1.8.6: Self-Assessment \u0026 Capability Description
> 1.8.7: Seff-Ammemmmehn \u0026 Cajabcfcns Demclcjncih
> {noformat}
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