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/**************************************************************************
* *
* Regina - A Normal Surface Theory Calculator *
* Computational Engine *
* *
* Copyright (c) 1999-2025, 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. *
* *
* As an exception, when this program is distributed through (i) the *
* App Store by Apple Inc.; (ii) the Mac App Store by Apple Inc.; or *
* (iii) Google Play by Google Inc., then that store may impose any *
* digital rights management, device limits and/or redistribution *
* restrictions that are required by its terms of service. *
* *
* 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 <https://www.gnu.org/licenses/>. *
* *
**************************************************************************/
/*! \file hypersurface/xmlhypersurfacereader.h
* \brief Deals with parsing XML data for normal hypersurface lists.
*/
#ifndef __REGINA_XMLHYPERSURFACEREADER_H
#ifndef __DOXYGEN
#define __REGINA_XMLHYPERSURFACEREADER_H
#endif
#include <optional>
#include "regina-core.h"
#include "hypersurface/normalhypersurfaces.h"
#include "file/xml/xmlpacketreader.h"
namespace regina {
/**
* An XML element reader that reads a single normal hypersurface in a
* 4-manifold triangulation.
*
* \nopython
*/
class XMLNormalHypersurfaceReader : public XMLElementReader {
private:
std::optional<NormalHypersurface> surface_;
/**< The normal hypersurface currently being read. */
SnapshotRef<Triangulation<4>> tri_;
/**< The triangulation in which this hypersurface lives. */
HyperCoords coords_;
/**< The coordinate system used by this hypersurface. */
int vecEnc_;
/**< The integer encoding used for the normal hypersurface
vector, or 0 if this is unknown. */
long vecLen_;
/**< The length of the normal hypersurface vector, or -1 if
this is unknown (since 0 is a valid vector length). */
std::string name_;
/**< The optional name associated with this normal hypersurface. */
public:
/**
* Creates a new normal hypersurface reader.
*
* \param tri the triangulation in which this normal hypersurface lives.
* \param coords the coordinate system used by this normal hypersurface.
*/
XMLNormalHypersurfaceReader(const SnapshotRef<Triangulation<4>>& tri,
HyperCoords coords);
/**
* Returns a reference to the normal hypersurface that has been read.
*
* \return the normal hypersurface, or \nullopt if an error occurred.
*/
std::optional<NormalHypersurface>& hypersurface();
void startElement(const std::string& tagName,
const regina::xml::XMLPropertyDict& tagProps,
XMLElementReader* parentReader) override;
void initialChars(const std::string& chars) override;
XMLElementReader* startSubElement(const std::string& subTagName,
const regina::xml::XMLPropertyDict& subTagProps) override;
};
/**
* An XML packet reader that reads a single normal hypersurface list.
*
* \nopython
*/
class XMLNormalHypersurfacesReader : public XMLPacketReader {
private:
std::shared_ptr<PacketOf<NormalHypersurfaces>> list_;
/**< The normal hypersurface list currently being read. */
const Triangulation<4>* tri_;
/**< The triangulation in which these normal hypersurfaces live. */
public:
/**
* Creates a new normal hypersurface list reader.
*
* All parameters not explained here are the same as for the
* parent class XMLPacketReader.
*
* \param props the attributes of the \c hypersurfaces XML element.
*/
XMLNormalHypersurfacesReader(XMLTreeResolver& resolver,
std::shared_ptr<Packet> parent, bool anon, std::string label,
std::string id, const regina::xml::XMLPropertyDict& props);
std::shared_ptr<Packet> packetToCommit() override;
XMLElementReader* startContentSubElement(const std::string& subTagName,
const regina::xml::XMLPropertyDict& subTagProps) override;
void endContentSubElement(const std::string& subTagName,
XMLElementReader* subReader) override;
};
/**
* An XML packet reader that reads a single normal hypersurface list
* using the older second-generation file format.
*
* \nopython
*/
class XMLLegacyNormalHypersurfacesReader : public XMLPacketReader {
private:
std::shared_ptr<PacketOf<NormalHypersurfaces>> list_;
/**< The normal hypersurface list currently being read. */
const Triangulation<4>& tri_;
/**< The triangulation in which these normal hypersurfaces live. */
public:
/**
* Creates a new normal hypersurface list reader.
*
* All parameters not explained here are the same as for the
* parent class XMLPacketReader.
*
* \param tri the triangulation in which these normal hypersurfaces
* live.
*/
XMLLegacyNormalHypersurfacesReader(XMLTreeResolver& resolver,
std::shared_ptr<Packet> parent, bool anon, std::string label,
std::string id, const Triangulation<4>& tri);
std::shared_ptr<Packet> packetToCommit() override;
XMLElementReader* startContentSubElement(const std::string& subTagName,
const regina::xml::XMLPropertyDict& subTagProps) override;
void endContentSubElement(const std::string& subTagName,
XMLElementReader* subReader) override;
};
// Inline functions for XMLNormalHypersurfaceReader
inline XMLNormalHypersurfaceReader::XMLNormalHypersurfaceReader(
const SnapshotRef<Triangulation<4>>& tri, HyperCoords coords) :
tri_(tri), coords_(coords), vecLen_(-1), vecEnc_(0) {
}
inline std::optional<NormalHypersurface>&
XMLNormalHypersurfaceReader::hypersurface() {
return surface_;
}
// Inline functions for XMLNormalHypersurfacesReader
inline std::shared_ptr<Packet> XMLNormalHypersurfacesReader::packetToCommit() {
return list_;
}
// Inline functions for XMLLegacyNormalHypersurfacesReader
inline XMLLegacyNormalHypersurfacesReader::XMLLegacyNormalHypersurfacesReader(
XMLTreeResolver& res, std::shared_ptr<Packet> parent, bool anon,
std::string label, std::string id, const Triangulation<4>& tri) :
XMLPacketReader(res, std::move(parent), anon, std::move(label),
std::move(id)),
list_(nullptr), tri_(tri) {
}
inline std::shared_ptr<Packet>
XMLLegacyNormalHypersurfacesReader::packetToCommit() {
return list_;
}
} // namespace regina
#endif
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