/*
* call-seq:
* children
*
* Get the list of children for this node as a NodeSet
*/
static VALUE children(VALUE self)
{
xmlNodePtr node;
xmlNodePtr child;
xmlNodeSetPtr set;
VALUE document;
VALUE node_set;
Data_Get_Struct(self, xmlNode, node);
child = node->children;
set = xmlXPathNodeSetCreate(child);
document = DOC_RUBY_OBJECT(node->doc);
if(!child) { return Nokogiri_wrap_xml_node_set(set, document); }
child = child->next;
while(NULL != child) {
xmlXPathNodeSetAddUnique(set, child);
child = child->next;
}
node_set = Nokogiri_wrap_xml_node_set(set, document);
return node_set;
}
/*
* call-seq:
* element_children
*
* Get the list of children for this node as a NodeSet. All nodes will be
* element nodes.
*
* Example:
*
* @doc.root.element_children.all? { |x| x.element? } # => true
*/
static VALUE element_children(VALUE self)
{
xmlNodePtr node;
xmlNodePtr child;
xmlNodeSetPtr set;
VALUE document;
VALUE node_set;
Data_Get_Struct(self, xmlNode, node);
child = xmlFirstElementChild(node);
set = xmlXPathNodeSetCreate(child);
document = DOC_RUBY_OBJECT(node->doc);
if(!child) return Nokogiri_wrap_xml_node_set(set, document);
child = xmlNextElementSibling(child);
while(NULL != child) {
xmlXPathNodeSetAddUnique(set, child);
child = xmlNextElementSibling(child);
}
node_set = Nokogiri_wrap_xml_node_set(set, document);
return node_set;
}
/*
* call-seq:
* dup
*
* Duplicate this node set
*/
static VALUE duplicate(VALUE self)
{
xmlNodeSetPtr node_set;
Data_Get_Struct(self, xmlNodeSet, node_set);
xmlNodeSetPtr dupl = xmlXPathNodeSetMerge(NULL, node_set);
return Nokogiri_wrap_xml_node_set(dupl, rb_iv_get(self, "@document"));
}
/*
* call-seq:
* dup
*
* Duplicate this node set
*/
static VALUE duplicate(VALUE self)
{
nokogiriNodeSetTuple *tuple;
xmlNodeSetPtr dupl;
Data_Get_Struct(self, nokogiriNodeSetTuple, tuple);
dupl = xmlXPathNodeSetMerge(NULL, tuple->node_set);
return Nokogiri_wrap_xml_node_set(dupl, rb_iv_get(self, "@document"));
}
static void ruby_funcall(xmlXPathParserContextPtr ctx, int nargs)
{
VALUE xpath_handler = Qnil;
VALUE result;
VALUE *argv;
VALUE doc;
VALUE node_set = Qnil;
xmlNodeSetPtr xml_node_set = NULL;
xmlXPathObjectPtr obj;
int i;
nokogiriNodeSetTuple *node_set_tuple;
assert(ctx);
assert(ctx->context);
assert(ctx->context->userData);
assert(ctx->context->doc);
assert(DOC_RUBY_OBJECT_TEST(ctx->context->doc));
xpath_handler = (VALUE)(ctx->context->userData);
argv = (VALUE *)calloc((size_t)nargs, sizeof(VALUE));
for (i = 0 ; i < nargs ; ++i) {
rb_gc_register_address(&argv[i]);
}
doc = DOC_RUBY_OBJECT(ctx->context->doc);
if (nargs > 0) {
i = nargs - 1;
do {
obj = valuePop(ctx);
switch(obj->type) {
case XPATH_STRING:
argv[i] = NOKOGIRI_STR_NEW2(obj->stringval);
break;
case XPATH_BOOLEAN:
argv[i] = obj->boolval == 1 ? Qtrue : Qfalse;
break;
case XPATH_NUMBER:
argv[i] = rb_float_new(obj->floatval);
break;
case XPATH_NODESET:
argv[i] = Nokogiri_wrap_xml_node_set(obj->nodesetval, doc);
break;
default:
argv[i] = NOKOGIRI_STR_NEW2(xmlXPathCastToString(obj));
}
xmlXPathFreeNodeSetList(obj);
} while(i-- > 0);
}
result = rb_funcall2(
xpath_handler,
rb_intern((const char *)ctx->context->function),
nargs,
argv
);
for (i = 0 ; i < nargs ; ++i) {
rb_gc_unregister_address(&argv[i]);
}
free(argv);
switch(TYPE(result)) {
case T_FLOAT:
case T_BIGNUM:
case T_FIXNUM:
xmlXPathReturnNumber(ctx, NUM2DBL(result));
break;
case T_STRING:
xmlXPathReturnString(
ctx,
(xmlChar *)xmlXPathWrapCString(StringValuePtr(result))
);
break;
case T_TRUE:
xmlXPathReturnTrue(ctx);
break;
case T_FALSE:
xmlXPathReturnFalse(ctx);
break;
case T_NIL:
break;
case T_ARRAY:
{
VALUE args[2];
args[0] = doc;
args[1] = result;
node_set = rb_class_new_instance(2, args, cNokogiriXmlNodeSet);
Data_Get_Struct(node_set, nokogiriNodeSetTuple, node_set_tuple);
xml_node_set = node_set_tuple->node_set;
xmlXPathReturnNodeSet(ctx, xmlXPathNodeSetMerge(NULL, xml_node_set));
}
break;
case T_DATA:
if(rb_obj_is_kind_of(result, cNokogiriXmlNodeSet)) {
Data_Get_Struct(result, nokogiriNodeSetTuple, node_set_tuple);
xml_node_set = node_set_tuple->node_set;
/* Copy the node set, otherwise it will get GC'd. */
xmlXPathReturnNodeSet(ctx, xmlXPathNodeSetMerge(NULL, xml_node_set));
break;
}
default:
rb_raise(rb_eRuntimeError, "Invalid return type");
}
}
/*
* call-seq:
* evaluate(search_path, handler = nil)
*
* Evaluate the +search_path+ returning an XML::XPath object.
*/
static VALUE evaluate(int argc, VALUE *argv, VALUE self)
{
VALUE search_path, xpath_handler;
VALUE thing = Qnil;
xmlXPathContextPtr ctx;
xmlXPathObjectPtr xpath;
xmlChar *query;
Data_Get_Struct(self, xmlXPathContext, ctx);
if(rb_scan_args(argc, argv, "11", &search_path, &xpath_handler) == 1)
xpath_handler = Qnil;
query = (xmlChar *)StringValuePtr(search_path);
if(Qnil != xpath_handler) {
/* FIXME: not sure if this is the correct place to shove private data. */
ctx->userData = (void *)xpath_handler;
xmlXPathRegisterFuncLookup(ctx, lookup, (void *)xpath_handler);
}
xmlResetLastError();
xmlSetStructuredErrorFunc(NULL, xpath_exception_handler);
/* For some reason, xmlXPathEvalExpression will blow up with a generic error */
/* when there is a non existent function. */
xmlSetGenericErrorFunc(NULL, xpath_generic_exception_handler);
xpath = xmlXPathEvalExpression(query, ctx);
xmlSetStructuredErrorFunc(NULL, NULL);
xmlSetGenericErrorFunc(NULL, NULL);
if(xpath == NULL) {
VALUE xpath = rb_const_get(mNokogiriXml, rb_intern("XPath"));
VALUE klass = rb_const_get(xpath, rb_intern("SyntaxError"));
xmlErrorPtr error = xmlGetLastError();
rb_exc_raise(Nokogiri_wrap_xml_syntax_error(klass, error));
}
assert(ctx->doc);
assert(DOC_RUBY_OBJECT_TEST(ctx->doc));
switch(xpath->type) {
case XPATH_STRING:
thing = NOKOGIRI_STR_NEW2(xpath->stringval);
break;
case XPATH_NODESET:
if(NULL == xpath->nodesetval) {
thing = Nokogiri_wrap_xml_node_set(xmlXPathNodeSetCreate(NULL),
DOC_RUBY_OBJECT(ctx->doc));
} else {
thing = Nokogiri_wrap_xml_node_set(xpath->nodesetval,
DOC_RUBY_OBJECT(ctx->doc));
}
break;
case XPATH_NUMBER:
thing = rb_float_new(xpath->floatval);
break;
case XPATH_BOOLEAN:
thing = xpath->boolval == 1 ? Qtrue : Qfalse;
break;
default:
thing = Nokogiri_wrap_xml_node_set(xmlXPathNodeSetCreate(NULL),
DOC_RUBY_OBJECT(ctx->doc));
}
xmlXPathFreeNodeSetList(xpath);
return thing;
}
static void method_caller(xmlXPathParserContextPtr ctxt, int nargs)
{
const xmlChar * function;
const xmlChar * functionURI;
size_t i, count;
xsltTransformContextPtr transform;
xmlXPathObjectPtr xpath;
VALUE obj;
VALUE *args;
VALUE result;
transform = xsltXPathGetTransformContext(ctxt);
function = ctxt->context->function;
functionURI = ctxt->context->functionURI;
obj = (VALUE)xsltGetExtData(transform, functionURI);
count = (size_t)ctxt->valueNr;
args = calloc(count, sizeof(VALUE *));
for(i = 0; i < count; i++) {
VALUE thing;
xpath = valuePop(ctxt);
switch(xpath->type) {
case XPATH_STRING:
thing = NOKOGIRI_STR_NEW2(xpath->stringval);
break;
case XPATH_NODESET:
if(NULL == xpath->nodesetval) {
thing = Nokogiri_wrap_xml_node_set(
xmlXPathNodeSetCreate(NULL),
DOC_RUBY_OBJECT(ctxt->context->doc));
} else {
thing = Nokogiri_wrap_xml_node_set(xpath->nodesetval,
DOC_RUBY_OBJECT(ctxt->context->doc));
}
break;
default:
rb_raise(rb_eRuntimeError, "do not handle type: %d", xpath->type);
}
args[i] = thing;
xmlFree(xpath);
}
result = rb_funcall3(obj, rb_intern((const char *)function), (int)count, args);
free(args);
switch(TYPE(result)) {
case T_FLOAT:
case T_BIGNUM:
case T_FIXNUM:
xmlXPathReturnNumber(ctxt, NUM2DBL(result));
break;
case T_STRING:
xmlXPathReturnString(
ctxt,
xmlStrdup((xmlChar *)StringValuePtr(result))
);
break;
case T_TRUE:
xmlXPathReturnTrue(ctxt);
break;
case T_FALSE:
xmlXPathReturnFalse(ctxt);
break;
case T_NIL:
break;
default:
rb_raise(rb_eRuntimeError, "Invalid return type");
}
}