File indexing completed on 2024-04-28 17:01:01

 // clang-format off
 /*
  *  This file is part of KDiff3.
  *
  * SPDX-FileCopyrightText: 2002-2011 Joachim Eibl, joachim.eibl at gmx.de
  * SPDX-FileCopyrightText: 2018-2020 Michael Reeves reeves.87@gmail.com
  * SPDX-License-Identifier: GPL-2.0-or-later
 */
 // clang-format on
 
 #include "kdiff3_shell.h"
 #include "TypeUtils.h"
 #include "version.h"
 
 #include <stdio.h>  // for fileno, stderr
 #include <stdlib.h> // for exit
 
 #ifndef Q_OS_WIN
 #include <unistd.h>
 #endif
 
 #include <KAboutData>
 #include <KCrash>
 #include <KLocalizedString>
 #include <KMessageBox>
 
 #include <QApplication>
 #include <QCommandLineOption>
 #include <QCommandLineParser>
 #include <QFile>
 #include <QScopedPointer>
 #include <QStandardPaths>
 #include <QStringList>
 #include <QTextStream>
 
 void initialiseCmdLineArgs(QCommandLineParser* cmdLineParser)
 {
     const QString configFileName = QStandardPaths::locate(QStandardPaths::GenericConfigLocation, "kdiff3rc");
     QFile configFile(configFileName);
     QString ignorableOptionsLine = "-u;-query;-html;-abort";
     if(configFile.open(QIODevice::ReadOnly))
     {
         QTextStream ts(&configFile);
         while(!ts.atEnd())
         {
             const QString line = ts.readLine();
             if(line.startsWith(u8"IgnorableCmdLineOptions="))
             {
                 const QtSizeType pos = line.indexOf('=');
                 if(pos >= 0)
                 {
                     ignorableOptionsLine = line.mid(pos + 1);
                 }
                 break;
             }
         }
     }
 
     const QStringList ignorableOptions = ignorableOptionsLine.split(';');
 
     for(QString ignorableOption: ignorableOptions)
     {
         ignorableOption.remove('-');
         if(!ignorableOption.isEmpty())
         {
             if(ignorableOption.length() == 1)
             {
                 cmdLineParser->addOption(QCommandLineOption({ignorableOption, u8"ignore"}, i18n("Ignored. (User defined.)")));
             }
             else
             {
                 cmdLineParser->addOption(QCommandLineOption(ignorableOption, i18n("Ignored. (User defined.)")));
             }
         }
     }
 }
 
 qint32 main(qint32 argc, char* argv[])
 {
     constexpr QLatin1String appName("kdiff3", sizeof("kdiff3") - 1);
     //Syncronize qt HDPI behavoir on all versions/platforms
     QCoreApplication::setAttribute(Qt::AA_UseHighDpiPixmaps);
     QCoreApplication::setAttribute(Qt::AA_EnableHighDpiScaling);
     QGuiApplication::setHighDpiScaleFactorRoundingPolicy(Qt::HighDpiScaleFactorRoundingPolicy::PassThrough);
 
     QApplication app(argc, argv); // KAboutData and QCommandLineParser depend on this being setup.
     KLocalizedString::setApplicationDomain(appName.data());
 
     KCrash::initialize();
 
     const QString i18nName = i18n("KDiff3");
     QString appVersion(KDIFF3_VERSION_STRING);
 
     appVersion += i18nc("Program version info.", " (64 bit)");
 
     const QString description = i18n("Tool for Comparison and Merge of Files and Folders");
     const QString copyright = i18n("(c) 2002-2014 Joachim Eibl, (c) 2017 Michael Reeves KF5/Qt5 port");
     const QString homePage = QStringLiteral("https://kde.org/applications/development/kdiff3");
 
     KAboutData aboutData(appName, i18nName,
                          appVersion, description, KAboutLicense::GPL_V2, copyright, QString(),
                          homePage);
 
     KAboutData::setApplicationData(aboutData);
 
     /*
         The QCommandLineParser is a static scoped unique ptr. This is safe given that.
         As the distuctor will not be fired until main exits.
     */
     QCommandLineParser* cmdLineParser = KDiff3Shell::getParser().get();
     cmdLineParser->setApplicationDescription(aboutData.shortDescription());
 
     aboutData.setupCommandLine(cmdLineParser);
 
     initialiseCmdLineArgs(cmdLineParser);
     // ignorable command options
     cmdLineParser->addOption(QCommandLineOption({u8"m", u8"merge"}, i18n("Merge the input.")));
     cmdLineParser->addOption(QCommandLineOption({u8"b", u8"base"}, i18n("Explicit base file. For compatibility with certain tools."), u8"file"));
     cmdLineParser->addOption(QCommandLineOption({u8"o", u8"output"}, i18n("Output file. Implies -m. E.g.: -o newfile.txt"), u8"file"));
     cmdLineParser->addOption(QCommandLineOption(u8"out", i18n("Output file, again. (For compatibility with certain tools.)"), u8"file"));
 #ifdef ENABLE_AUTO
     cmdLineParser->addOption(QCommandLineOption(u8"auto", i18n("No GUI if all conflicts are auto-solvable. (Needs -o file)")));
     cmdLineParser->addOption(QCommandLineOption(u8"noauto", i18n("Ignore --auto and always show GUI.")));
 #else
     cmdLineParser->addOption(QCommandLineOption(u8"noauto", i18n("Ignored.")));
     cmdLineParser->addOption(QCommandLineOption(u8"auto", i18n("Ignored.")));
 #endif
     cmdLineParser->addOption(QCommandLineOption(u8"L1", i18n("Visible name replacement for input file 1 (base)."), u8"alias1"));
     cmdLineParser->addOption(QCommandLineOption(u8"L2", i18n("Visible name replacement for input file 2."), u8"alias2"));
     cmdLineParser->addOption(QCommandLineOption(u8"L3", i18n("Visible name replacement for input file 3."), u8"alias3"));
     cmdLineParser->addOption(QCommandLineOption({u8"L", u8"fname"}, i18n("Alternative visible name replacement. Supply this once for every input."), u8"alias"));
     cmdLineParser->addOption(QCommandLineOption(u8"cs", i18n("Override a config setting. Use once for every setting. E.g.: --cs \"AutoAdvance=1\""), u8"string"));
     cmdLineParser->addOption(QCommandLineOption(u8"confighelp", i18n("Show list of config settings and current values.")));
     cmdLineParser->addOption(QCommandLineOption(u8"config", i18n("Use a different config file."), u8"file"));
 
     // other command options
     cmdLineParser->addPositionalArgument(u8"[File1]", i18n("file1 to open (base, if not specified via --base)"));
     cmdLineParser->addPositionalArgument(u8"[File2]", i18n("file2 to open"));
     cmdLineParser->addPositionalArgument(u8"[File3]", i18n("file3 to open"));
 
     bool isAtty = true;
 
 #ifndef Q_OS_WIN
     isAtty = isatty(fileno(stderr)) == 1;//will be true for redirected output as well
 #endif
     /*
         QCommandLineParser::process does what is expected on windows or when running from a commandline.
         However, it only accounts for a lack of terminal output on windows.
     */
     if(isAtty)
     {
         cmdLineParser->process(QCoreApplication::arguments());
     }
     else
     {
         /*
             There is no terminal connected so don't just exit mysteriously on error.
         */
         if(!cmdLineParser->parse(QCoreApplication::arguments()))
         {
             const QString errorMessage = cmdLineParser->errorText();
 
             KMessageBox::error(nullptr, "<html><head/><body><h2>" + errorMessage + "</h2><pre>" + i18n("See kdiff3 --help for supported options.") + "</pre></body></html>", aboutData.displayName());
             exit(1);
         }
 
         if(cmdLineParser->isSet(QStringLiteral("version")))
         {
             KMessageBox::information(nullptr,
                                     aboutData.displayName() + ' ' + aboutData.version(), aboutData.displayName());
             exit(0);
         }
         if(cmdLineParser->isSet(QStringLiteral("help")))
         {
             KMessageBox::information(nullptr, "<html><head/><body><pre>" + cmdLineParser->helpText() + "</pre></body></html>", aboutData.displayName());
 
             exit(0);
         }
     }
 
     aboutData.processCommandLine(cmdLineParser);
 
     /*
         This short segment is wrapped in a lambda to delay KDiff3Shell construction until
         after the main event loop starts. Thus allowing us to avoid std::exit as much as
         possiable. Makes for a cleaner exit.
     */
     QPointer<KDiff3Shell> p;
     QMetaObject::invokeMethod(
         qApp, [&p] {
             /*
               Do not attempt to call show here that will be done later.
               This variable exists solely to insure the KDiff3Shell is deleted on exit.
             */
             p = new KDiff3Shell();
         },
         Qt::QueuedConnection);
     qint32 retVal = QApplication::exec();
     delete p;
     return retVal;
 }