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/**************************************************************************
* *
* Regina - A Normal Surface Theory Calculator *
* Computational Engine *
* *
* Copyright (c) 1999-2009, Ben Burton *
* For further details contact Ben Burton (bab@debian.org). *
* *
* 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 2 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, write to the Free *
* Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, *
* MA 02110-1301, USA. *
* *
**************************************************************************/
/* end stub */
#include "packet/nxmlpacketreaders.h"
#include "utilities/base64.h"
#include <cctype>
#include <string>
namespace regina {
/**
* A unique namespace containing various task-specific packet readers.
*/
namespace {
/**
* Reads a single script variable and its value.
*/
class NScriptVarReader : public NXMLElementReader {
private:
std::string name, value;
public:
virtual void startElement(const std::string& /* tagName */,
const regina::xml::XMLPropertyDict& props,
NXMLElementReader*) {
name = props.lookup("name");
value = props.lookup("value");
}
const std::string& getName() {
return name;
}
const std::string& getValue() {
return value;
}
};
}
NXMLElementReader* NXMLPDFReader::startContentSubElement(
const std::string& subTagName, const regina::xml::XMLPropertyDict&) {
if (subTagName == "pdf")
return new NXMLCharsReader();
else
return new NXMLElementReader();
}
void NXMLPDFReader::endContentSubElement(const std::string& subTagName,
NXMLElementReader* subReader) {
if (subTagName == "pdf") {
std::string base64 = dynamic_cast<NXMLCharsReader*>(subReader)->
getChars();
// Strip out whitespace.
std::string::iterator in = base64.begin();
std::string::iterator out = base64.begin();
while (in != base64.end()) {
if (::isspace(*in))
++in;
else {
if (in == out) {
++in;
++out;
} else
*out++ = *in++;
}
}
// Is there any data at all?
if (out == base64.begin()) {
pdf->reset();
return;
}
// Convert from base64.
char* data;
size_t dataLen;
if (base64Decode(base64.c_str(), out - base64.begin(), &data, &dataLen))
pdf->reset(data, dataLen, NPDF::OWN_NEW);
else
pdf->reset();
}
}
NXMLElementReader* NXMLScriptReader::startContentSubElement(
const std::string& subTagName,
const regina::xml::XMLPropertyDict&) {
if (subTagName == "line")
return new NXMLCharsReader();
else if (subTagName == "var")
return new NScriptVarReader();
else
return new NXMLElementReader();
}
void NXMLScriptReader::endContentSubElement(const std::string& subTagName,
NXMLElementReader* subReader) {
if (subTagName == "line")
script->addLast(dynamic_cast<NXMLCharsReader*>(subReader)->getChars());
else if (subTagName == "var") {
NScriptVarReader* var = dynamic_cast<NScriptVarReader*>(subReader);
if (! var->getName().empty())
script->addVariable(var->getName(), var->getValue());
}
}
NXMLPacketReader* NContainer::getXMLReader(NPacket*) {
return new NXMLContainerReader();
}
NXMLPacketReader* NPDF::getXMLReader(NPacket*) {
return new NXMLPDFReader();
}
NXMLPacketReader* NScript::getXMLReader(NPacket*) {
return new NXMLScriptReader();
}
NXMLPacketReader* NText::getXMLReader(NPacket*) {
return new NXMLTextReader();
}
} // namespace regina
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