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#include "xmpmeta/xml/utils.h"
#include "android-base/logging.h"
#include "base/port.h"
#include "xmpmeta/xml/const.h"
#include "xmpmeta/xml/search.h"
namespace photos_editing_formats {
namespace xml {
xmlNodePtr GetFirstDescriptionElement(const xmlDocPtr parent) {
return DepthFirstSearch(parent, XmlConst::RdfDescription());
}
xmlNodePtr GetFirstSeqElement(xmlDocPtr parent) {
// DepthFirstSearch will perform the null check.
return DepthFirstSearch(parent, XmlConst::RdfSeq());
}
// Returns the first rdf:Seq element found in the given node.
xmlNodePtr GetFirstSeqElement(xmlNodePtr parent) {
// DepthFirstSearch will perform the null check.
return DepthFirstSearch(parent, XmlConst::RdfSeq());
}
// Returns the ith (zero-indexed) element in the given node.
// {@code parent} is an rdf:Seq node.
xmlNodePtr GetElementAt(xmlNodePtr node, int index) {
if (node == nullptr || index < 0) {
LOG(ERROR) << "Node was null or index was negative";
return nullptr;
}
const string node_name = FromXmlChar(node->name);
if (strcmp(node_name.c_str(), XmlConst::RdfSeq())) {
LOG(ERROR) << "Node is not an rdf:Seq node, was " << node_name;
return nullptr;
}
int i = 0;
for (xmlNodePtr child = node->children; child != nullptr && i <= index;
child = child->next) {
if (strcmp(FromXmlChar(child->name), XmlConst::RdfLi())) {
// This is not an rdf:li node. This can occur because the node's content
// is also treated as a node, and these should be ignored.
continue;
}
if (i == index) {
return child;
}
i++;
}
return nullptr;
}
const string GetLiNodeContent(xmlNodePtr node) {
string value;
if (node == nullptr || strcmp(FromXmlChar(node->name), XmlConst::RdfLi())) {
LOG(ERROR) << "Node is null or is not an rdf:li node";
return value;
}
xmlChar* node_content = xmlNodeGetContent(node);
value = FromXmlChar(node_content);
free(node_content);
return value;
}
const string XmlDocToString(const xmlDocPtr doc) {
xmlChar* xml_doc_contents;
int doc_size = 0;
xmlDocDumpFormatMemoryEnc(doc, &xml_doc_contents, &doc_size,
XmlConst::EncodingStr(), 1);
const string xml_doc_string(FromXmlChar(xml_doc_contents));
xmlFree(xml_doc_contents);
return xml_doc_string;
}
} // namespace xml
} // namespace photos_editing_formats
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