[ http://issues.apache.org/jira/browse/JELLY-236?page=all ]
dion gillard moved JEXL-18 to JELLY-236:
----------------------------------------
Project: Commons Jelly (was: Commons JEXL)
Key: JELLY-236 (was: JEXL-18)
> Whitespace normalization in Jelly is wrong
> ------------------------------------------
>
> Key: JELLY-236
> URL: http://issues.apache.org/jira/browse/JELLY-236
> Project: Commons Jelly
> Issue Type: Bug
> Reporter: Kohsuke Kawaguchi
>
> In XML, the convention is to only remove "ignorable whitespaces". Ignorable
> whitespaces are defined as a text block that entirely consist of whitespaces,
> surrounded by tags. So the following text are ignorable whitespaces:
> <foo> <bar> // text between two start tags
> <foo> </foo> // text between start and end tag
> (Technically speaking, they are ignorable only when DTD says so, but those
> are nevertheless people usually consider them pseudo-ignorable even if
> there's no DTD.)
> But the following text are never ignorable whitespaces:
> <foo> x <bar>
> <foo> y </foo>
> Jelly agressively trims off whitespaces, even if they are not ignorable. So
> in the above cases, it becomes:
> <foo>x<bar>
> <foo>y</foo>
> Such mode of whitespace normalization is not seen anywhere else, and IMHO it
> is confusing.
> It is sometimes even harmful, for example because the following text:
> <p> some text <b>here</b></p>
> ... becomes:
> <p>some text<b>here</b></p>
> and you end up losing the significant space character between 'text' and
> 'here'. As an example of proper whitespace stripping, consult XSLT
> (http://www.w3.org/TR/1999/REC-xslt-19991116#strip)
> I do realize that one can control the whitespace stripping behavior by using
> TagSupport.setEscapeText(boolean), but nevertheless I thought I would file a
> bug to see if the development team is willing to consider this change. I also
> do realize that this has some non-trivial compatibility implications.
> If you are willing to fix this, I have already patched Jelly locally, so I'm
> happy to contribute a patch.
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