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/* $Id: ruby_xml_xpath_context.c,v 1.2 2006/02/27 12:55:32 roscopeco Exp $ */
/* Please see the LICENSE file for copyright and distribution information */
#include "libxml.h"
#include "ruby_xml_xpath_context.h"
VALUE cXMLXPathContext;
/*
* call-seq:
* context.doc => document
*
* Obtain the XML::Document associated with this XPath.
*/
VALUE
ruby_xml_xpath_context_doc_get(VALUE self) {
ruby_xml_xpath_context *rxxpc;
Data_Get_Struct(self, ruby_xml_xpath_context, rxxpc);
return(rxxpc->xd);
}
void
ruby_xml_xpath_context_free(ruby_xml_xpath_context *rxxpc) {
if (rxxpc->ctxt != NULL) {
xmlXPathFreeContext(rxxpc->ctxt);
rxxpc->ctxt = NULL;
}
free(rxxpc);
}
void
ruby_xml_xpath_context_mark(ruby_xml_xpath_context *rxxpc) {
if (rxxpc == NULL) return;
if (!NIL_P(rxxpc->xd)) rb_gc_mark(rxxpc->xd);
}
VALUE
ruby_xml_xpath_context_new(VALUE class, VALUE xd,
xmlXPathContextPtr xxpc) {
ruby_xml_xpath_context *rxxpc;
rxxpc = ALLOC(ruby_xml_xpath_context);
rxxpc->ctxt = xxpc;
rxxpc->xd = xd;
return(Data_Wrap_Struct(class, ruby_xml_xpath_context_mark,
ruby_xml_xpath_context_free, rxxpc));
}
VALUE
ruby_xml_xpath_context_new2(VALUE xd, xmlXPathContextPtr xxpc) {
return(ruby_xml_xpath_context_new(cXMLXPathContext, xd, xxpc));
}
VALUE
ruby_xml_xpath_context_new3(VALUE xd) {
ruby_xml_document *rxd;
xmlXPathContextPtr ctxt;
Data_Get_Struct(xd, ruby_xml_document, rxd);
if (rxd->doc == NULL)
return(Qnil);
ctxt = xmlXPathNewContext(rxd->doc);
if (ctxt == NULL)
return(Qnil);
return(ruby_xml_xpath_context_new2(xd, ctxt));
}
VALUE
ruby_xml_xpath_context_new4(VALUE rnode) {
ruby_xml_node *node;
Data_Get_Struct(rnode, ruby_xml_node, node);
return(ruby_xml_xpath_context_new3(node->xd));
}
/*
* call-seq:
* context.register_namespace(prefix, uri) => (true|false)
*
* Register the specified namespace URI with the specified prefix
* in this context.
*/
VALUE
ruby_xml_xpath_context_register_namespace(VALUE self, VALUE prefix, VALUE uri) {
ruby_xml_xpath_context *rxxpc;
Data_Get_Struct(self, ruby_xml_xpath_context, rxxpc);
if (xmlXPathRegisterNs(rxxpc->ctxt,
(xmlChar*)StringValuePtr(prefix),
(xmlChar*)StringValuePtr(uri))
== 0) {
return(Qtrue);
} else {
/* Should raise an exception, IMHO */
return(Qfalse);
}
}
// Rdoc needs to know
#ifdef RDOC_NEVER_DEFINED
mXML = rb_define_module("XML");
cXMLXPath = rb_define_class_under(mXML, "XPath", rb_cObject);
#endif
void
ruby_init_xml_xpath_context(void) {
cXMLXPathContext = rb_define_class_under(cXMLXPath, "Context", rb_cObject);
rb_define_method(cXMLXPathContext, "register_namespace",
ruby_xml_xpath_context_register_namespace, 2);
rb_define_method(cXMLXPathContext, "doc",
ruby_xml_xpath_context_doc_get, 0);
}
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