On Jun 3, 2008, at 10:57, Martin Edge wrote:
I don't half wonder whether the Intermediate parser is a little
dodgey?
I'm pretty sure I'm not doing anything silly, but I get the
intermediate file I generate, process that to PCL, I can see it fine.
I simply open the .AT file, paste into Visual Studio which formats
it, and paste it back, and the PCL no longer generates properly.
Perhaps white spaces are a problem?
Yep. If spaces are encountered in the input FO, then this will result
in <space> nodes in the area tree. Linefeeds would lead to the
generation of a new <lineArea>. The <word> nodes are expected to not
contain any space or linefeed characters themselves.
The org.apache.fop.area.AreaTreeParser does not compensate for
spaces, linefeeds and/or carriage-returns being added due to
intermediate reformatting. This is generally not a problem, unless
the area tree is serialized to a file and treated in an editor (which
is not really good practice). Reformatting should really only be used
to make the XML human-readable for debugging. Once the XML needs to
be fed back into any consuming application, be sure to undo the
pretty-printing if you expect identical results. In this case, the
white-space should obviously be ignored, but from a more abstract
point-of-view, there are no criteria for the consuming application to
decide whether the additional white-space is significant or not.
That said, AFAICT there is indeed something buggy in the handling of
the SAX characters() event in AreaTreeParser. The characters are
appended to a StringBuffer, but this StringBuffer is only reset in
endElement() events.
IIC, this means that the AreaTreeParser.content StringBuffer for the
first <word> node will get to contain all the accumulated leading
white-space characters of its ancestor nodes.
How do you "debug" in Java? :)
Same as most other programming languages: using an IDE with
integrated debugging facilities. ;-)
For help on setting up FOP in an IDE, see http://wiki.apache.org/
xmlgraphics-fop/FOPIDESetupGuide. Note that some of the info is
outdated, so the steps may vary slightly for more recent versions of
the IDEs. Updates to the Wiki are always welcome.
HTH!
Cheers
Andreas
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