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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/>. *
* *
**************************************************************************/
#include <list>
#include "file/xml/xmlfilterreader.h"
#include "utilities/stringutils.h"
namespace regina {
XMLElementReader* XMLLegacyFilterReader::startContentSubElement(
const std::string& subTagName,
const regina::xml::XMLPropertyDict& props) {
if (! filter_)
if (subTagName == "filter") {
int type;
// Run through all the filter types that the file format supports.
if (valueOf(props.lookup("typeid"), type)) {
switch (static_cast<SurfaceFilterType>(type)) {
case SurfaceFilterType::LegacyDefault:
return dataReader_ =
new XMLPlainFilterReader(resolver_,
parent_, anon_, label_, id_);
case SurfaceFilterType::Properties:
return dataReader_ =
new XMLLegacyPropertiesFilterReader(resolver_,
parent_, anon_, label_, id_);
case SurfaceFilterType::Combination:
return dataReader_ =
new XMLLegacyCombinationFilterReader(resolver_,
parent_, anon_, label_, id_);
default:
return new XMLPacketReader(resolver_,
parent_, anon_, label_, id_);
}
}
}
return new XMLElementReader();
}
void XMLLegacyFilterReader::endContentSubElement(const std::string&, XMLElementReader*) {
if (dataReader_)
filter_ = dataReader_->packetToCommit();
}
XMLCombinationFilterReader::XMLCombinationFilterReader(
XMLTreeResolver& res, std::shared_ptr<Packet> parent, bool anon,
std::string label, std::string id,
const regina::xml::XMLPropertyDict& props) :
XMLPacketReader(res, std::move(parent), anon, std::move(label), std::move(id)),
filter_(nullptr) {
std::string type = props.lookup("op");
if (type == "and") {
filter_ = std::make_shared<SurfaceFilterCombination>();
filter_->setUsesAnd(true);
} else if (type == "or") {
filter_ = std::make_shared<SurfaceFilterCombination>();
filter_->setUsesAnd(false);
}
}
XMLElementReader* XMLLegacyCombinationFilterReader::startContentSubElement(
const std::string& subTagName,
const regina::xml::XMLPropertyDict& props) {
if (! filter_)
if (subTagName == "op") {
std::string type = props.lookup("type");
if (type == "and") {
filter_ = std::make_shared<SurfaceFilterCombination>();
filter_->setUsesAnd(true);
} else if (type == "or") {
filter_ = std::make_shared<SurfaceFilterCombination>();
filter_->setUsesAnd(false);
}
}
return new XMLElementReader();
}
XMLPropertiesFilterReader::XMLPropertiesFilterReader(
XMLTreeResolver& res, std::shared_ptr<Packet> parent, bool anon,
std::string label, std::string id,
const regina::xml::XMLPropertyDict& props) :
XMLPacketReader(res, std::move(parent), anon, std::move(label), std::move(id)),
filter_(nullptr) {
BoolSet orbl, compact, realbdry;
auto prop = props.find("orbl");
if (prop != props.end()) {
if (! valueOf(prop->second, orbl))
return;
} else
orbl.fill();
prop = props.find("compact");
if (prop != props.end()) {
if (! valueOf(prop->second, compact))
return;
} else
compact.fill();
prop = props.find("realbdry");
if (prop != props.end()) {
if (! valueOf(prop->second, realbdry))
return;
} else
realbdry.fill();
// We have successfully parsed the BoolSet attributes.
filter_ = std::make_shared<SurfaceFilterProperties>();
filter_->setOrientability(orbl);
filter_->setCompactness(compact);
filter_->setRealBoundary(realbdry);
std::string euler = props.lookup("euler");
if (! euler.empty()) {
std::istringstream str(euler);
std::string val;
try {
while (std::getline(str, val, ','))
filter_->addEulerChar(LargeInteger(val));
} catch (const regina::InvalidArgument&) {
// We cannot parse the list of Euler characteristics. Abort.
filter_.reset();
}
}
}
XMLElementReader* XMLLegacyPropertiesFilterReader::startContentSubElement(
const std::string& subTagName,
const regina::xml::XMLPropertyDict& props) {
if (subTagName == "euler") {
return new XMLCharsReader();
} else if (subTagName == "orbl") {
BoolSet b;
if (valueOf(props.lookup("value"), b))
filter_->setOrientability(b);
} else if (subTagName == "compact") {
BoolSet b;
if (valueOf(props.lookup("value"), b))
filter_->setCompactness(b);
} else if (subTagName == "realbdry") {
BoolSet b;
if (valueOf(props.lookup("value"), b))
filter_->setRealBoundary(b);
}
return new XMLElementReader();
}
void XMLLegacyPropertiesFilterReader::endContentSubElement(
const std::string& subTagName, XMLElementReader* subReader) {
if (subTagName == "euler") {
std::vector<std::string> tokens = basicTokenise(
static_cast<XMLCharsReader*>(subReader)->chars());
for (const auto& t : tokens) {
try {
filter_->addEulerChar(LargeInteger(t));
} catch (const regina::InvalidArgument&) {
// Silently fail with this token, but move on and try the next.
// Note that this behaviour changes with the second-generation
// file format, where an unparseable Euler characteristic
// will result in the entire filter being dropped.
}
}
}
}
} // namespace regina
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