initialstate.cxx

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/*
 * SPDX-FileName: initialstate.cxx
 * SPDX-FileComment: setup initial state of the aircraft
 * SPDX-FileCopyrightText: Copyright (C) 2016 James Turner <zakalawe@mac.com>
 * SPDX-License-Identifier: GPL-2.0-or-later
 */
 
#include "config.h"
 
#include <algorithm>
 
#include <simgear/debug/logstream.hxx>
#include <simgear/props/props_io.hxx>
 
#include <GUI/MessageBox.hxx>
#include <Main/fg_props.hxx>
 
#include "initialstate.hxx"
 
using namespace simgear;
 
 
namespace {
 
class NodeValue
{
public:
    explicit NodeValue(const std::string& s) : v(s) {}
    bool operator()(const SGPropertyNode_ptr n) const
    {
        return (v == n->getStringValue());
    }
 
private:
    std::string v;
};
 
SGPropertyNode_ptr nodeForState(const std::string& nm)
{
    SGPropertyNode_ptr sim = fgGetNode("/sim");
    const PropertyList& states = sim->getChildren("state");
    PropertyList::const_iterator it;
    for (it = states.begin(); it != states.end(); ++it) {
        const PropertyList& names = (*it)->getChildren("name");
        if (std::find_if(names.begin(), names.end(), NodeValue(nm)) != names.end()) {
            return *it;
        }
    }
 
    return SGPropertyNode_ptr();
}
 
} // namespace
 
namespace flightgear {
 
bool isInitialStateName(const std::string& name)
{
    SGPropertyNode_ptr n = nodeForState(name);
    return n.valid();
}
 
void applyInitialState()
{
    std::string nm = fgGetString("/sim/aircraft-state");
    if (nm.empty()) {
        return;
    }
 
    SGPropertyNode_ptr stateNode = nodeForState(nm);
    if (!stateNode) {
        SG_LOG(SG_AIRCRAFT, SG_WARN, "missing state node for:" << nm);
        std::string aircraft = fgGetString("/sim/aircraft");
        modalMessageBox("Unknown aircraft state",
                        "The selected aircraft (" + aircraft + ") does not have a state '" + nm + "'");
 
        return;
    }
 
    SG_LOG(SG_AIRCRAFT, SG_INFO, "Applying aircraft state:" << nm);
 
    // copy all overlay properties to the tree
    copyProperties(stateNode->getChild("overlay"), globals->get_props());
}
 
} // namespace flightgear