In a form I'm working on, I'd like to apply a stylesheet located in a
document instance (instance('filter') to an input document located in
another instance (instance('userdoc')).
It doesn't seem to be working, and I wonder if anyone here can see
what I'm doing wrong.
I've studied the code for the existing transform() function, which accepts
a node set and a URI and then calls XsltForms_browser.transformText
with that same node set, that same URI, and a flag to signal that the
second argument is a URI and not a literal string containing an angle-bracket
encoding of a stylesheet.
If I understand the code for the underlying transformText function
correctly (not guaranteed!), it can accept either a URI or a stylesheet
in string form in its second argument, and its third argument tells the
system which case applies.
- If the third argument is true, the second argument is passed to
a parser and a DOM object is returned.
- If the third argument is false, the second argument is used to
load an external document, and the resulting DOM is returned.
(At least, I assume the results are DOM objects.)
Other calls to transformText() seem to use strings successfully in
the second argument.
So I wrote an extension function that looks like this:
function bmt_applyxslt_ns_s(nsXML, sXSLT) {
if (arguments.length !== 2) {
throw
XsltForms_xpathFunctionExceptions.transformInvalidArgumentsNumber;
}
return nsXML.length === 0? "" :
XsltForms_browser.transformText(XsltForms_browser.saveXML(nsXML[0]), sXSLT,
true);
}
This is almost verbatim the same as the source code for transform(),
except for the argument names and 'true' instead of 'false' in the
third argument. (I notice now that I ought to change the name of
the exception, perhaps, too.)
I register the function with XSLTforms in the usual way.
<xf:setvalue
ref="instance('userout')/self::data"
value="bmt:s_applyxslt_ns_s(instance('userdoc'),
serialize(instance('filter')))"/>
The form loads as expected and the function seems to be called
without incident and without error messages (and alert messages
confirm that the arguments look pretty much as I expect them to look).
But the result is consistently not the output I expect from the stylesheet,
but a document which reads in its entirety:
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd";><html
xmlns="http://www.w3.org/1999/xhtml";>
<head><title></title></head>
<body>
<pre></pre>
</body>
</html>
Anyone have a clue? Anyone have a better (or just different) way to go about
this?
Thanks!
Michael Sperberg-McQueen
--
****************************************************************
* C. M. Sperberg-McQueen, Black Mesa Technologies LLC
* http://www.blackmesatech.com
* http://cmsmcq.com/mib
* http://balisage.net
****************************************************************
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