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/*************************************************************************
** XMLNode.cpp **
** **
** This file is part of dvisvgm -- the DVI to SVG converter **
** Copyright (C) 2005-2011 Martin Gieseking <martin.gieseking@uos.de> **
** **
** This program is free software; you can redistribute it and/or **
** modify it under the terms of the GNU General Public License as **
** published by the Free Software Foundation; either version 3 of **
** the License, or (at your option) any later version. **
** **
** This program is distributed in the hope that it will be useful, but **
** WITHOUT ANY WARRANTY; without even the implied warranty of **
** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the **
** GNU General Public License for more details. **
** **
** You should have received a copy of the GNU General Public License **
** along with this program; if not, see <http://www.gnu.org/licenses/>. **
*************************************************************************/
#include "macros.h"
#include "XMLNode.h"
#include "XMLString.h"
using namespace std;
bool XMLNode::emit (ostream &os, XMLNode *stopNode) {
if (this == stopNode)
return false;
write(os);
return true;
}
XMLElementNode::XMLElementNode (const string &n) : _name(n), _emitted(false) {
}
XMLElementNode::~XMLElementNode () {
FORALL(_children, ChildList::iterator, i)
delete *i;
}
void XMLElementNode::addAttribute (const string &name, const string &value) {
_attributes[name] = value;
}
void XMLElementNode::addAttribute (const string &name, double value) {
_attributes[name] = XMLString(value);
}
void XMLElementNode::append (XMLNode *child) {
if (!child)
return;
XMLTextNode *textNode1 = dynamic_cast<XMLTextNode*>(child);
if (!textNode1 || _children.empty())
_children.push_back(child);
else {
if (XMLTextNode *textNode2 = dynamic_cast<XMLTextNode*>(_children.back()))
textNode2->append(textNode1); // merge two consecutive text nodes
else
_children.push_back(child);
}
}
void XMLElementNode::append (const string &str) {
if (_children.empty() || !dynamic_cast<XMLTextNode*>(_children.back()))
_children.push_back(new XMLTextNode(str));
else
static_cast<XMLTextNode*>(_children.back())->append(str);
}
void XMLElementNode::prepend (XMLNode *child) {
if (!child)
return;
XMLTextNode *textNode1 = dynamic_cast<XMLTextNode*>(child);
if (!textNode1 || _children.empty())
_children.push_front(child);
else {
if (XMLTextNode *textNode2 = dynamic_cast<XMLTextNode*>(_children.back()))
textNode2->prepend(textNode1); // merge two consecutive text nodes
else
_children.push_front(child);
}
}
/** Inserts a new child node before a given child node already present. The latter
* will be the following sibling of the node to be inserted. If there's no such
* node present, nothing is inserted.
* @param[in] child node to be inserted
* @param[in] sibling following sibling of 'child'
* @return true on success */
bool XMLElementNode::insertBefore (XMLNode *child, XMLNode *sibling) {
ChildList::iterator it = _children.begin();
while (it != _children.end() && *it != sibling)
++it;
if (it != _children.end()) {
_children.insert(it, child);
return true;
}
return false;
}
/** Inserts a new child node after a given child node already present. The latter
* will be the preceding sibling of the node to be inserted. If there's no such
* node present, nothing is inserted.
* @param[in] child node to be inserted
* @param[in] sibling preceding sibling of 'child'
* @return true on success */
bool XMLElementNode::insertAfter (XMLNode *child, XMLNode *sibling) {
ChildList::iterator it = _children.begin();
while (it != _children.end() && *it != sibling)
++it;
if (it != _children.end()) {
_children.insert(++it, child);
return true;
}
return false;
}
ostream& XMLElementNode::write (ostream &os) const {
os << '<' << _name;
FORALL(_attributes, AttribMap::const_iterator, i)
os << ' ' << i->first << "='" << i->second << '\'';
if (_children.empty())
os << "/>\n";
else {
os << '>';
if (dynamic_cast<XMLElementNode*>(_children.front()))
os << '\n';
FORALL(_children, ChildList::const_iterator, i)
(*i)->write(os);
os << "</" << _name << ">\n";
}
return os;
}
/** Writes a part of the XML tree to the given output stream and removes
* the completely written nodes. The output stops when a stop node is reached
* (this node won't be printed at all). If a node was only partly emitted, i.e.
* its child was the stop node, a further call of emit will continue the output.
* @param[in] os stream to which the output is sent to
* @param[in] stopElement node where emitting stops (if 0 the whole tree will be emitted)
* @return true if node was emitted completely */
bool XMLElementNode::emit (ostream &os, XMLNode *stopNode) {
if (this == stopNode)
return false;
if (!_emitted) {
os << '<' << _name;
FORALL(_attributes, AttribMap::iterator, i)
os << ' ' << i->first << "='" << i->second << '\'';
if (_children.empty())
os << "/>\n";
else {
os << '>';
if (dynamic_cast<XMLElementNode*>(_children.front()))
os << '\n';
}
_emitted = true;
}
if (!_children.empty()) {
FORALL(_children, ChildList::iterator, i) {
if ((*i)->emit(os, stopNode)) {
ChildList::iterator it = i++; // prevent i from being invalidated...
_children.erase(it); // ... by erase
--i; // @@ what happens if i points to first child?
}
else
return false;
}
os << "</" << _name << ">\n";
}
return true;
}
/** Returns true if this element has an attribute of given name. */
bool XMLElementNode::hasAttribute (const string &name) const {
return _attributes.find(name) != _attributes.end();
}
//////////////////////
void XMLTextNode::append (XMLNode *node) {
if (XMLTextNode *tn = dynamic_cast<XMLTextNode*>(node))
append(tn);
else
delete node;
}
void XMLTextNode::append (XMLTextNode *node) {
if (node)
_text += node->_text;
delete node;
}
void XMLTextNode::append (const string &str) {
_text += str;
}
void XMLTextNode::prepend (XMLNode *node) {
if (XMLTextNode *tn = dynamic_cast<XMLTextNode*>(node))
prepend(tn);
else
delete node;
}
//////////////////////
XMLDeclarationNode::XMLDeclarationNode (const string &n, const string &p)
: _name(n), _params(p), _emitted(false)
{
}
XMLDeclarationNode::~XMLDeclarationNode () {
FORALL(_children, list<XMLDeclarationNode*>::iterator, i)
delete *i;
}
void XMLDeclarationNode::append (XMLDeclarationNode *child) {
if (child)
_children.push_back(child);
}
ostream& XMLDeclarationNode::write (ostream &os) const {
os << "<!" << _name << ' ' << _params;
if (_children.empty())
os << ">\n";
else {
os << "[\n";
FORALL(_children, list<XMLDeclarationNode*>::const_iterator, i)
(*i)->write(os);
os << "]>\n";
}
return os;
}
bool XMLDeclarationNode::emit (ostream &os, XMLNode *stopNode) {
if (this == stopNode)
return false;
if (!_emitted) {
os << "<!" << _name << ' ' << _params;
if (_children.empty())
os << ">\n";
else
os << "[\n";
_emitted = true;
}
if (!_children.empty()) {
FORALL(_children, list<XMLDeclarationNode*>::iterator, i) {
if ((*i)->emit(os, stopNode)) {
list<XMLDeclarationNode*>::iterator it = i++; // prevent i from being invalidated...
_children.erase(it); // ... by erase
--i; // @@ what happens if i points to first child?
}
else
return false;
}
os << "]>\n";
}
return true;
}
//////////////////////
ostream& XMLCDataNode::write (ostream &os) const {
os << "<![CDATA[\n"
<< _data
<< "]]>\n";
return os;
}
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