configuration_variable.cc

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/*
    Copyright (C) 1999-2009 Paul Davis

    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., 675 Mass Ave, Cambridge, MA 02139, USA.

*/

#include <iostream>

#include "pbd/compose.h"
#include "pbd/configuration_variable.h"
#include "pbd/debug.h"

using namespace std;
using namespace PBD;

void
ConfigVariableBase::add_to_node (XMLNode& node)
{
        const std::string v = get_as_string ();
        DEBUG_TRACE (DEBUG::Configuration, string_compose ("Config variable %1 stored as [%2]\n", _name, v));
        XMLNode* child = new XMLNode ("Option");
        child->add_property ("name", _name);
        child->add_property ("value", v);
        node.add_child_nocopy (*child);
}

bool
ConfigVariableBase::set_from_node (XMLNode const & node)
{
        if (node.name() == "Config" || node.name() == "Canvas" || node.name() == "UI") {

                /* ardour.rc */

                const XMLProperty* prop;
                XMLNodeList nlist;
                XMLNodeConstIterator niter;
                XMLNode* child;

                nlist = node.children();

                for (niter = nlist.begin(); niter != nlist.end(); ++niter) {

                        child = *niter;

                        if (child->name() == "Option") {
                                if ((prop = child->property ("name")) != 0) {
                                        if (prop->value() == _name) {
                                                if ((prop = child->property ("value")) != 0) {
                                                        set_from_string (prop->value());
                                                        return true;
                                                }
                                        }
                                }
                        }
                }

        } else if (node.name() == "Options") {

                /* session file */

                XMLNodeList olist;
                XMLNodeConstIterator oiter;
                XMLNode* option;
                const XMLProperty* opt_prop;

                olist = node.children();

                for (oiter = olist.begin(); oiter != olist.end(); ++oiter) {

                        option = *oiter;

                        if (option->name() == _name) {
                                if ((opt_prop = option->property ("val")) != 0) {
                                        set_from_string (opt_prop->value());
                                        return true;
                                }
                        }
                }
        }

        return false;
}

void
ConfigVariableBase::notify ()
{
        // placeholder for any debugging desired when a config variable is modified
}

void
ConfigVariableBase::miss ()
{
        // placeholder for any debugging desired when a config variable
        // is set but to the same value as it already has
}