Chris@149: /* -*- c-basic-offset: 4 indent-tabs-mode: nil -*-  vi:set ts=8 sts=4 sw=4: */
Chris@149: 
Chris@149: /*
Chris@149:     Sonic Visualiser
Chris@149:     An audio file viewer and annotation editor.
Chris@149:     Centre for Digital Music, Queen Mary, University of London.
Chris@149:     This file copyright 2006 Chris Cannam.
Chris@149:     
Chris@149:     This program is free software; you can redistribute it and/or
Chris@149:     modify it under the terms of the GNU General Public License as
Chris@149:     published by the Free Software Foundation; either version 2 of the
Chris@149:     License, or (at your option) any later version.  See the file
Chris@149:     COPYING included with this distribution for more information.
Chris@149: */
Chris@149: 
Chris@149: #include "ConfigFile.h"
Chris@149: 
Chris@150: #include "Exceptions.h"
Chris@149: 
Chris@149: #include <iostream>
Chris@149: 
Chris@149: #include <QFile>
Chris@149: #include <QMutexLocker>
Chris@149: #include <QTextStream>
Chris@149: #include <QStringList>
Chris@149: 
Chris@149: ConfigFile::ConfigFile(QString filename) :
Chris@149:     m_filename(filename),
Chris@149:     m_loaded(false),
Chris@149:     m_modified(false)
Chris@149: {
Chris@149: }
Chris@149: 
Chris@149: ConfigFile::~ConfigFile()
Chris@149: {
Chris@149:     try {
Chris@149:         commit();
Chris@149:     } catch (FileOperationFailed f) {
Chris@149:         std::cerr << "WARNING: ConfigFile::~ConfigFile: Commit failed for "
Chris@149:                   << m_filename.toStdString() << std::endl;
Chris@149:     }
Chris@149: }
Chris@149: 
Chris@149: QString
Chris@149: ConfigFile::get(QString key, QString deft)
Chris@149: {
Chris@149:     if (!m_loaded) load();
Chris@149:         
Chris@149:     QMutexLocker locker(&m_mutex);
Chris@149: 
Chris@149:     if (m_data.find(key) == m_data.end()) return deft;
Chris@149:     return m_data[key];
Chris@149: }
Chris@149: 
Chris@149: int
Chris@149: ConfigFile::getInt(QString key, int deft)
Chris@149: {
Chris@149:     return get(key, QString("%1").arg(deft)).toInt();
Chris@149: }
Chris@149: 
Chris@149: bool
Chris@149: ConfigFile::getBool(QString key, bool deft)
Chris@149: {
Chris@149:     QString value = get(key, deft ? "true" : "false").trimmed().toLower();
Chris@149:     return (value == "true" || value == "yes" || value == "on" || value == "1");
Chris@149: }
Chris@149:  
Chris@149: float
Chris@149: ConfigFile::getFloat(QString key, float deft)
Chris@149: {
Chris@149:     return get(key, QString("%1").arg(deft)).toFloat();
Chris@149: }
Chris@149: 
Chris@149: QStringList
Chris@149: ConfigFile::getStringList(QString key)
Chris@149: {
Chris@149:     return get(key).split('|');
Chris@149: }
Chris@149: 
Chris@149: void
Chris@149: ConfigFile::set(QString key, QString value)
Chris@149: {
Chris@149:     if (!m_loaded) load();
Chris@149:         
Chris@149:     QMutexLocker locker(&m_mutex);
Chris@149: 
Chris@149:     m_data[key] = value;
Chris@149: 
Chris@149:     m_modified = true;
Chris@149: }
Chris@149: 
Chris@149: void
Chris@149: ConfigFile::set(QString key, int value)
Chris@149: {
Chris@149:     set(key, QString("%1").arg(value));
Chris@149: }
Chris@149: 
Chris@149: void
Chris@149: ConfigFile::set(QString key, bool value)
Chris@149: {
Chris@149:     set(key, value ? QString("true") : QString("false"));
Chris@149: }
Chris@149: 
Chris@149: void
Chris@149: ConfigFile::set(QString key, float value)
Chris@149: {
Chris@149:     set(key, QString("%1").arg(value));
Chris@149: }
Chris@149: 
Chris@149: void
Chris@149: ConfigFile::set(QString key, const QStringList &values)
Chris@149: {
Chris@149:     set(key, values.join("|"));
Chris@149: }
Chris@149: 
Chris@149: void
Chris@149: ConfigFile::commit()
Chris@149: {
Chris@149:     QMutexLocker locker(&m_mutex);
Chris@149: 
Chris@149:     if (!m_modified) return;
Chris@149: 
Chris@149:     // Really we should write to another file and then move to the
Chris@149:     // intended target, but I don't think we're all that particular
Chris@149:     // about reliability here at the moment
Chris@149: 
Chris@149:     QFile file(m_filename);
Chris@149: 
Chris@149:     if (!file.open(QFile::WriteOnly | QFile::Text)) {
Chris@149:         throw FileOperationFailed(m_filename, "open for writing");
Chris@149:     }
Chris@149:     
Chris@149:     QTextStream out(&file);
Chris@149: 
Chris@149:     for (DataMap::const_iterator i = m_data.begin(); i != m_data.end(); ++i) {
Chris@149:         out << i->first << "=" << i->second << endl;
Chris@149:     }
Chris@149: 
Chris@149:     m_modified = false;
Chris@149: }
Chris@149: 
Chris@149: bool
Chris@149: ConfigFile::load()
Chris@149: {
Chris@149:     QMutexLocker locker(&m_mutex);
Chris@149: 
Chris@149:     if (m_loaded) return true;
Chris@149: 
Chris@149:     QFile file(m_filename);
Chris@149: 
Chris@149:     if (!file.open(QFile::ReadOnly | QFile::Text)) {
Chris@149:         return false;
Chris@149:     }
Chris@149: 
Chris@149:     QTextStream in(&file);
Chris@149: 
Chris@149:     m_data.clear();
Chris@149: 
Chris@149:     while (!in.atEnd()) {
Chris@149:         
Chris@149:         QString line = in.readLine(2048);
Chris@149:         QString key = line.section('=', 0, 0);
Chris@149:         QString value = line.section('=', 1, -1);
Chris@149:         if (key == "") continue;
Chris@149: 
Chris@149:         m_data[key] = value;
Chris@149:     }
Chris@149:     
Chris@149:     m_loaded = true;
Chris@149:     m_modified = false;
Chris@149:     return true;
Chris@149: }
Chris@149: 
Chris@149: void
Chris@149: ConfigFile::reset()
Chris@149: {
Chris@149:     QMutexLocker locker(&m_mutex);
Chris@149:     m_loaded = false;
Chris@149:     m_modified = false;
Chris@149: }
Chris@149: