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https://issues.apache.org/jira/browse/BATIK-953?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13963741#comment-13963741
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James Burton commented on BATIK-953:
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We have figured this bug out. It has to do with a bug in
sun.font.StandardGlyphVector.getGlyphMetrics(). If you ask for the metrics for
a character that has no glyphs (like a space) and it's not the first character
in the text chunk, then it calculates the bounds.x value wrong. This is
compounded by Batik caching glyph geometry. I'll attach two svg files with
this comment that shows the issue.
> Trailing whitespace in tspan elements breaks text-anchor alignment (only on
> Windows?)
> -------------------------------------------------------------------------------------
>
> Key: BATIK-953
> URL: https://issues.apache.org/jira/browse/BATIK-953
> Project: Batik
> Issue Type: Bug
> Components: GVT Text
> Affects Versions: 1.8
> Environment: Operating System: Windows Vista
> Platform: PC
> URL:
> http://mail-archives.apache.org/mod_mbox/xmlgraphics-batik-users/201008.mbox/browser#msg-1
> Reporter: Helder Magalhães
> Assignee: Batik Developer's Mailing list
> Attachments: Batik-Bug49736-Testcase.svg
>
>
> Trailing whitespace seems to trigger a weird issue where text contents are
> thrown right a lot more than expected. It's as if "text-anchor" inheritance
> was no longer honored in these cases (and reset to "start", the lacuna value).
> Bug's URL points to a thread ("JSVGCanvas Problems - Rendering and Writing")
> which contains the original test case and a modified test case which doesn't
> reproduce the issue (basically, with trailing whitespace trimmed).
> According to the thread, the issue doesn't seem to reproduce on Linux. Can
> anyone else confirm and provide information for MacOS as well?
> BATIK-689 seems tightly related, although the issue is not quite the same (it
> refers to a MacOS-specific issue). Also, thread "tspans fail to line up" [1]
> seems related as well. I wonder if all these are the same...?
> A possible workaround is to make sure tspan elements don't contain trailing
> whitespace.
> [1]
> http://mail-archives.apache.org/mod_mbox/xmlgraphics-batik-users/200701.mbox/browser#msg-19
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