view base/UnitDatabase.cpp @ 1376:d9511f9e04d7 dev/refactor-piper-related

Introduce some POD structs for describing an external server application and the desired libraries to load from it, and disambiguating between empty list request and invalid list request. This allows for overriding PiperVampPluginFactory behaviour for using a PluginScan to populate the list request.

/* -*- c-basic-offset: 4 indent-tabs-mode: nil -*-  vi:set ts=8 sts=4 sw=4: */

/*
    Sonic Visualiser
    An audio file viewer and annotation editor.
    Centre for Digital Music, Queen Mary, University of London.
    This file copyright 2006 Chris Cannam.
    
    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.  See the file
    COPYING included with this distribution for more information.
*/

#include "UnitDatabase.h"

UnitDatabase
UnitDatabase::m_instance;

UnitDatabase *
UnitDatabase::getInstance()
{
    return &m_instance;
}

UnitDatabase::UnitDatabase() :
    m_nextId(0)
{
}

QStringList
UnitDatabase::getKnownUnits() const
{
    QStringList list;
    for (UnitMap::const_iterator i = m_units.begin(); i != m_units.end(); ++i) {
        list.push_back(i->first);
    }
    return list;
}

void
UnitDatabase::registerUnit(QString unit)
{
    if (m_units.find(unit) == m_units.end()) {
        m_units[unit] = m_nextId++;
        emit unitDatabaseChanged();
    }
}

int
UnitDatabase::getUnitId(QString unit, bool registerNew)
{
    if (m_units.find(unit) == m_units.end()) {
        if (registerNew) registerUnit(unit);
        else return -1;
    }
    return m_units[unit];
}

QString
UnitDatabase::getUnitById(int id)
{
    for (UnitMap::const_iterator i = m_units.begin(); i != m_units.end(); ++i) {
        if (i->second == id) return i->first;
    }
    return "";
}