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/*
* Copyright (C) 2014 Aaron Seigo <aseigo@kde.org>
*
* 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.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#include "repl.h"
#include <QDir>
#include <QFile>
#include <QFinalState>
#include <QStandardPaths>
#include <QTextStream>
#include "replStates.h"
#include "syntaxtree.h"
#include "linenoise.hpp"
Repl::Repl(QObject *parent)
: QStateMachine(parent)
{
linenoise::LoadHistory(commandHistoryPath().toLocal8Bit());
// create all states
ReadState *read = new ReadState(this);
UnfinishedReadState *unfinishedRead = new UnfinishedReadState(this);
EvalState *eval = new EvalState(this);
PrintState *print = new PrintState(this);
QFinalState *final = new QFinalState(this);
// connect the transitions
read->addTransition(read, SIGNAL(command(QString)), eval);
read->addTransition(read, SIGNAL(exitRequested()), final);
unfinishedRead->addTransition(unfinishedRead, SIGNAL(command(QString)), eval);
unfinishedRead->addTransition(unfinishedRead, SIGNAL(exitRequested()), final);
eval->addTransition(eval, SIGNAL(completed()), read);
eval->addTransition(eval, SIGNAL(continueInput()), unfinishedRead);
eval->addTransition(eval, SIGNAL(output(QString)), print);
print->addTransition(print, SIGNAL(completed()), eval);
setInitialState(read);
printWelcomeBanner();
start();
}
Repl::~Repl()
{
linenoise::SaveHistory(commandHistoryPath().toLocal8Bit());
}
void Repl::printWelcomeBanner()
{
QTextStream out(stdout);
out << QObject::tr("Welcome to the Sink interative shell!\n");
out << QObject::tr("Type `help` for information on the available commands.\n");
out.flush();
}
QString Repl::commandHistoryPath()
{
const QString path = QStandardPaths::writableLocation(QStandardPaths::DataLocation);
if (!QFile::exists(path)) {
QDir dir;
dir.mkpath(path);
}
return path + "/repl_history";
}
#include "moc_repl.cpp"
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