File indexing completed on 2024-05-19 04:56:01

 /**
  * \file externalprocess.cpp
  * Handler for external process.
  *
  * \b Project: Kid3
  * \author Urs Fleisch
  * \date 22 Feb 2007
  *
  * Copyright (C) 2007-2018  Urs Fleisch
  *
  * This file is part of Kid3.
  *
  * Kid3 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.
  *
  * Kid3 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, see <http://www.gnu.org/licenses/>.
  */
 
 #include "externalprocess.h"
 #include <QProcess>
 #include <QString>
 #include <QStringList>
 #include "taggedfile.h"
 #include "iusercommandprocessor.h"
 #include "kid3application.h"
 
 /**
  * Destructor.
  */
 ExternalProcess::IOutputViewer::~IOutputViewer()
 {
 }
 
 
 /**
  * Constructor.
  *
  * @param app application context
  * @param parent parent object
  */
 ExternalProcess::ExternalProcess(Kid3Application* app, QObject* parent)
   : QObject(parent),
     m_app(app), m_process(nullptr), m_outputViewer(nullptr)
 {
   setObjectName(QLatin1String("ExternalProcess"));
   const auto userCommandProcessors = m_app->getUserCommandProcessors();
   for (IUserCommandProcessor* userCommandProcessor : userCommandProcessors) {
     userCommandProcessor->initialize(m_app);
     connect(userCommandProcessor->qobject(), SIGNAL(commandOutput(QString)), // clazy:exclude=old-style-connect
             this, SLOT(showOutputLine(QString)));
   }
 }
 
 /**
  * Destructor.
  */
 ExternalProcess::~ExternalProcess()
 {
   const auto userCommandProcessors = m_app->getUserCommandProcessors();
   for (IUserCommandProcessor* userCommandProcessor : userCommandProcessors) {
     userCommandProcessor->cleanup();
   }
 }
 
 /**
  * Launch a command.
  *
  * @param name       display name
  * @param args       command and arguments
  * @param showOutput true to show output of process
  * @return false if process could not be executed.
  */
 bool ExternalProcess::launchCommand(const QString& name, const QStringList& args,
                                     bool showOutput)
 {
   if (args.isEmpty())
     return true;
 
   if (!m_process) {
     m_process = new QProcess(parent());
   }
   if (m_process->state() != QProcess::NotRunning) {
     m_process = new QProcess(parent());
   }
   connect(m_process, static_cast<void (QProcess::*)(int, QProcess::ExitStatus)>(
             &QProcess::finished),
           this, &ExternalProcess::finished, Qt::UniqueConnection);
 
   if (showOutput && m_outputViewer) {
     m_process->setProcessChannelMode(QProcess::MergedChannels);
     connect(m_process, &QProcess::readyReadStandardOutput,
             this, &ExternalProcess::readFromStdout);
     m_outputViewer->setCaption(name);
     m_outputViewer->scrollToBottom();
   } else {
     disconnect(m_process, &QProcess::readyReadStandardOutput,
                this, &ExternalProcess::readFromStdout);
   }
 
   QStringList arguments = args;
   QString program = arguments.takeFirst();
   if (program.startsWith(QLatin1Char('@'))) {
     program = program.mid(1);
     const auto userCommandProcessors = m_app->getUserCommandProcessors();
     for (IUserCommandProcessor* userCommandProcessor : userCommandProcessors) {
       if (userCommandProcessor->userCommandKeys().contains(program)) {
         connect(userCommandProcessor->qobject(), SIGNAL(finished(int)),
                 this, SIGNAL(finished(int)), Qt::UniqueConnection);
         if (userCommandProcessor->startUserCommand(program, arguments,
                                                    showOutput)) {
           return true;
         }
       }
     }
   }
   m_process->start(program, arguments);
   if (!m_process->waitForStarted(10000)) {
     return false;
   }
   return true;
 }
 
 /**
  * Read data from standard output and display it in the output viewer.
  */
 void ExternalProcess::readFromStdout()
 {
   if (m_outputViewer) {
     m_outputViewer->append(QString::fromLocal8Bit(
                              m_process->readAllStandardOutput()));
   }
 }
 
 /**
  * Show a line in the output viewer.
  * @param msg message to be displayed
  */
 void ExternalProcess::showOutputLine(const QString& msg)
 {
   if (m_outputViewer) {
     m_outputViewer->append(msg + QLatin1Char('\n'));
   }
 }