File indexing completed on 2024-11-24 04:52:45

 /*
  * 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 "commandline.h"
 
 Repl::Repl(QObject *parent)
     : QStateMachine(parent)
 {
     Commandline::loadHistory(commandHistoryPath());
 
     // 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()
 {
     Commandline::saveHistory(commandHistoryPath());
 }
 
 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"