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livetrax/libs/pbd3/xml++.cc

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/* xml++.cc
* libxml++ and this file are copyright (C) 2000 by Ari Johnson, and
* are covered by the GNU Lesser General Public License, which should be
* included with libxml++ as the file COPYING.
*/
#include <pbd/xml++.h>
#include <libxml/debugXML.h>
static XMLNode *readnode(xmlNodePtr);
static void writenode(xmlDocPtr, XMLNode *, xmlNodePtr, int);
XMLTree::XMLTree()
: _filename(),
_root(),
_compression(0),
_initialized(false)
{
}
XMLTree::XMLTree(const string &fn)
: _filename(fn),
_root(0),
_compression(0),
_initialized(false)
{
read();
}
XMLTree::XMLTree(const XMLTree * from)
{
_filename = from->filename();
_root = new XMLNode(*from->root());
_compression = from->compression();
_initialized = true;
}
XMLTree::~XMLTree()
{
if (_initialized && _root)
delete _root;
}
int
XMLTree::set_compression(int c)
{
if (c > 9)
c = 9;
if (c < 0)
c = 0;
_compression = c;
return _compression;
}
bool
XMLTree::read(void)
{
xmlDocPtr doc;
if (_root) {
delete _root;
_root = 0;
}
xmlKeepBlanksDefault(0);
doc = xmlParseFile(_filename.c_str());
if (!doc) {
_initialized = false;
return false;
}
_root = readnode(xmlDocGetRootElement(doc));
xmlFreeDoc(doc);
_initialized = true;
return true;
}
bool
XMLTree::read_buffer(const string & buffer)
{
xmlDocPtr doc;
_filename = "";
if (_root) {
delete _root;
_root = 0;
}
doc = xmlParseMemory((char *) buffer.c_str(), buffer.length());
if (!doc) {
_initialized = false;
return false;
}
_root = readnode(xmlDocGetRootElement(doc));
xmlFreeDoc(doc);
_initialized = true;
return true;
}
bool
XMLTree::write(void) const
{
xmlDocPtr doc;
XMLNodeList children;
int result;
xmlKeepBlanksDefault(0);
doc = xmlNewDoc((xmlChar *) "1.0");
xmlSetDocCompressMode(doc, _compression);
writenode(doc, _root, doc->children, 1);
result = xmlSaveFormatFile(_filename.c_str(), doc, 1);
xmlFreeDoc(doc);
if (result == -1)
return false;
return true;
}
void
XMLTree::debug(FILE* out) const
{
xmlDocPtr doc;
XMLNodeList children;
xmlKeepBlanksDefault(0);
doc = xmlNewDoc((xmlChar *) "1.0");
xmlSetDocCompressMode(doc, _compression);
writenode(doc, _root, doc->children, 1);
xmlDebugDumpDocument (out, doc);
xmlFreeDoc(doc);
}
const string &
XMLTree::write_buffer(void) const
{
static string retval;
char *ptr;
int len;
xmlDocPtr doc;
XMLNodeList children;
xmlKeepBlanksDefault(0);
doc = xmlNewDoc((xmlChar *) "1.0");
xmlSetDocCompressMode(doc, _compression);
writenode(doc, _root, doc->children, 1);
xmlDocDumpMemory(doc, (xmlChar **) & ptr, &len);
xmlFreeDoc(doc);
retval = ptr;
free(ptr);
return retval;
}
XMLNode::XMLNode(const string & n)
: _name(n), _is_content(false), _content(string())
{
if (_name.empty())
_initialized = false;
else
_initialized = true;
}
XMLNode::XMLNode(const string & n, const string & c)
:_name(string()), _is_content(true), _content(c)
{
_initialized = true;
}
XMLNode::XMLNode(const XMLNode& from)
: _initialized(false)
{
XMLPropertyList props;
XMLPropertyIterator curprop;
XMLNodeList nodes;
XMLNodeIterator curnode;
_name = from.name();
set_content(from.content());
props = from.properties();
for (curprop = props.begin(); curprop != props.end(); curprop++)
add_property((*curprop)->name(), (*curprop)->value());
nodes = from.children();
for (curnode = nodes.begin(); curnode != nodes.end(); curnode++)
add_child_copy(**curnode);
}
XMLNode::~XMLNode()
{
XMLNodeIterator curchild;
XMLPropertyIterator curprop;
for (curchild = _children.begin(); curchild != _children.end();
curchild++)
delete *curchild;
for (curprop = _proplist.begin(); curprop != _proplist.end();
curprop++)
delete *curprop;
}
const string &
XMLNode::set_content(const string & c)
{
if (c.empty())
_is_content = false;
else
_is_content = true;
_content = c;
return _content;
}
const XMLNodeList &
XMLNode::children(const string & n) const
{
static XMLNodeList retval;
XMLNodeConstIterator cur;
if (n.length() == 0)
return _children;
retval.erase(retval.begin(), retval.end());
for (cur = _children.begin(); cur != _children.end(); cur++)
if ((*cur)->name() == n)
retval.insert(retval.end(), *cur);
return retval;
}
XMLNode *
XMLNode::add_child(const string & n)
{
return add_child_copy(XMLNode (n));
}
void
XMLNode::add_child_nocopy (XMLNode& n)
{
_children.insert(_children.end(), &n);
}
XMLNode *
XMLNode::add_child_copy(const XMLNode& n)
{
XMLNode *copy = new XMLNode (n);
_children.insert(_children.end(), copy);
return copy;
}
XMLNode *
XMLNode::add_content(const string & c)
{
return add_child_copy(XMLNode (string(), c));
}
XMLProperty *
XMLNode::property(const string & n)
{
if (_propmap.find(n) == _propmap.end())
return 0;
return _propmap[n];
}
XMLProperty *
XMLNode::add_property(const string & n, const string & v)
{
if(_propmap.find(n) != _propmap.end()){
remove_property(n);
}
XMLProperty *tmp = new XMLProperty(n, v);
if (!tmp)
return 0;
_propmap[tmp->name()] = tmp;
_proplist.insert(_proplist.end(), tmp);
return tmp;
}
void
XMLNode::remove_property(const string & n)
{
if (_propmap.find(n) != _propmap.end()) {
_proplist.remove(_propmap[n]);
_propmap.erase(n);
}
}
void
XMLNode::remove_nodes(const string & n)
{
XMLNodeIterator i = _children.begin();
XMLNodeIterator tmp;
while (i != _children.end()) {
tmp = i;
++tmp;
if ((*i)->name() == n) {
_children.erase (i);
}
i = tmp;
}
}
void
XMLNode::remove_nodes_and_delete(const string & n)
{
XMLNodeIterator i = _children.begin();
XMLNodeIterator tmp;
while (i != _children.end()) {
tmp = i;
++tmp;
if ((*i)->name() == n) {
delete *i;
_children.erase (i);
}
i = tmp;
}
}
XMLProperty::XMLProperty(const string &n, const string &v)
: _name(n),
_value(v)
{
}
XMLProperty::~XMLProperty()
{
}
static XMLNode *
readnode(xmlNodePtr node)
{
string name, content;
xmlNodePtr child;
XMLNode *tmp;
xmlAttrPtr attr;
if (node->name)
name = (char *) node->name;
else
name = string();
tmp = new XMLNode(name);
for (attr = node->properties; attr; attr = attr->next) {
name = (char *) attr->name;
content = "";
if (attr->children)
content = (char *) attr->children->content;
tmp->add_property(name, content);
}
if (node->content)
tmp->set_content((char *) node->content);
else
tmp->set_content(string());
for (child = node->children; child; child = child->next)
tmp->add_child_nocopy (*readnode(child));
return tmp;
}
static void
writenode(xmlDocPtr doc, XMLNode * n, xmlNodePtr p, int root =
0)
{
XMLPropertyList props;
XMLPropertyIterator curprop;
XMLNodeList children;
XMLNodeIterator curchild;
xmlNodePtr node;
if (root)
node = doc->children =
xmlNewDocNode(doc, 0, (xmlChar *) n->name().c_str(), 0);
else
node = xmlNewChild(p, 0, (xmlChar *) n->name().c_str(), 0);
if (n->is_content()) {
node->type = XML_TEXT_NODE;
xmlNodeSetContentLen(node, (const xmlChar *) n->content().c_str(),
n->content().length());
}
props = n->properties();
for (curprop = props.begin(); curprop != props.end(); curprop++)
xmlSetProp(node, (xmlChar *) (*curprop)->name().c_str(),
(xmlChar *) (*curprop)->value().c_str());
children = n->children();
for (curchild = children.begin(); curchild != children.end();
curchild++)
writenode(doc, *curchild, node);
}