Re: [xml] registering a extension module in libxslt (solved)

[Stefan Kost <kost imn htwk-leipzig de>]

irks, found it myself. Need to add 'xsl:extension-element-prefixes'

<xsl:stylesheet version="1.0"
				xmlns:xsl="http://www.w3.org/1999/XSL/Transform";
				xmlns:i18n="<URI>"
				xmlns="http://gitk.sourceforge.net/";
				xsl:extension-element-prefixes="i18n"

I am not sure why not all extension do need it? Hava look at
libxslt-1.1.4/tests/extensions/ list.xsl and module.xsl

ciao
  Stefan

Stefan Kost wrote:
> hi all,
> 
> below is a code snippet, when executing it and loading the stylesheet the
> extension module initialisation gets not triggered and later I get:
> 
> libxslt-error: xsltValueOf: text copy failed
> [gitk-core:gitkerrors.c:95] : libxml-error: xmlXPathCompOpEval: function gettext
> not found
> [gitk-core:gitkerrors.c:95] : libxml-error: Unregistered function
> 
> The URI does definitely match (it uses the same constant definition).
> I had a look at the libxslt source, but e.g. things like
> xsltRegisterExtFunction() are not called verbatim anymore (params come from hashes).
> 
> @daniel could you please extend the example at
> http://xmlsoft.org/XSLT/extensions.html
> with example calls to xsltRegisterExtModule() and xsltRegisterExtFunction() and
> a xslt snipped that is using the extension?
> 
> Many thanks
>   Stefan
> 
> --------------
> 
> ...
> if(xsltRegisterExtModule(I18N_NS_URL,xsltExtInit_i18n,xsltExtShutdown_i18n)) {
>   gitk_err("failed to register extension modules (i18n)");
>   result=FALSE;
> }
> ...
> if(!(xsl_i18n=xsltParseStylesheetFile(XSL_PATH"i18n.xsl"))) {
>   gitk_err("failed to load stylesheet (i18n.xsl)");
>   result=FALSE;
> }
> ...
> 
> void *xsltExtInit_i18n(xsltTransformContextPtr ctxt, const xmlChar *URI) {
>   gitk_log_intro();
>   gitk_log1(">>>>>>>>>> URI=\"%s\"",URI);
>   if(xsltRegisterExtFunction(
>     ctxt,"gettext",URI,xmlXPathEvalFunc_i18n_gettext)
>   ) {
>     gitk_err("failed to register extension function (i18n)");
>   }
>   gitk_log_outro();
>   return(NULL);
> }
> 
> void xsltExtShutdown_i18n(xsltTransformContextPtr ctxt,const xmlChar *URI,void
> *data) {
> }
> 
> void xmlXPathEvalFunc_i18n_gettext(xmlXPathParserContextPtr ctxt, int nargs) {
>   gitk_log_intro();
>   gitk_log1(">>>>>>>>>> nargs=%d",nargs);
>   gitk_log_outro();
> }
> 
> -----------------
> 
> <xsl:stylesheet version="1.0"
>   xmlns:xsl="http://www.w3.org/1999/XSL/Transform";
>   xmlns:giml="http://gitk.sourceforge.net/";
>   xmlns:i18n="<I18N_NS_URL>"
>   xmlns="http://gitk.sourceforge.net/";
>   exclude-result-prefixes="giml">
> 
> <xsl:output method="xml" doctype-system="http://gitk.sourceforge.net/giml.dtd"/>
> 
> <xsl:template match="i18n:text">
>   <xsl:value-of select="i18n:gettext(.)"/>
> </xsl:template>
> ...
> 

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