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/**************************************************************************
* *
* Regina - A Normal Surface Theory Calculator *
* Qt User Interface *
* *
* Copyright (c) 1999-2025, Ben Burton *
* For further details contact Ben Burton (bab@debian.org). *
* *
* This file is modified from the KDE syntax-highlighting framework, *
* which is copyright (C) 2016 Volker Krause <vkrause@kde.org> *
* and is distributed under the GNU Library 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 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 "syntax/contextswitch.h"
#include "syntax/definition.h"
#include "syntax/definition_p.h"
#include "syntax/repository.h"
#include "utilities/stringutils.h"
#include <iostream>
namespace regina::syntax {
ContextSwitch::ContextSwitch() :
m_context(nullptr),
m_popCount(0)
{
}
ContextSwitch::~ContextSwitch()
{
}
bool ContextSwitch::isStay() const
{
return m_popCount == 0 && !m_context && m_contextName.empty() && m_defName.empty();
}
int ContextSwitch::popCount() const
{
return m_popCount;
}
Context* ContextSwitch::context() const
{
return m_context;
}
void ContextSwitch::parse(const std::string& contextInstr)
{
if (contextInstr.empty() || contextInstr == "#stay")
return;
if (regina::startsWith(contextInstr, "#pop!")) {
++m_popCount;
m_contextName = contextInstr.substr(5);
return;
}
if (regina::startsWith(contextInstr, "#pop")) {
++m_popCount;
parse(contextInstr.substr(4));
return;
}
auto idx = contextInstr.find("##");
if (idx != std::string::npos) {
m_contextName = contextInstr.substr(0, idx);
m_defName = contextInstr.substr(idx + 2);
} else {
m_contextName = contextInstr;
}
}
void ContextSwitch::resolve(const Definition &def)
{
auto d = def;
if (!m_defName.empty()) {
d = DefinitionData::get(def)->repo->definitionForName(m_defName);
auto data = DefinitionData::get(d);
data->load();
if (m_contextName.empty())
m_context = data->initialContext();
}
if (!m_contextName.empty()) {
m_context = DefinitionData::get(d)->contextByName(m_contextName);
if (!m_context)
std::cerr << "cannot find context " << m_contextName << " in " << def.name() << std::endl;
}
}
} // namespace regina::syntax
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