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/*
* Copyright (C) 2015-2018 Olzhas Rakhimov
*
* 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 3 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, see <http://www.gnu.org/licenses/>.
*/
/// @file
/// The main entrance to the SCRAM GUI.
#include <exception>
#include <iostream>
#include <string>
#include <vector>
#include <QApplication>
#include <QCoreApplication>
#include <QIcon>
#include <QLibraryInfo>
#include <QMessageBox>
#include <QSettings>
#include <QString>
#include <QTranslator>
#include <boost/exception/diagnostic_information.hpp>
#include <boost/program_options.hpp>
#include "language.h"
#include "mainwindow.h"
#include "src/error.h"
#include "src/version.h"
namespace po = boost::program_options;
namespace {
/// Parses the command-line arguments.
///
/// @param[in] argc Count of arguments.
/// @param[in] argv Values of arguments.
/// @param[out] vm Variables map of program options.
///
/// @returns 0 for success.
/// @returns 1 for errored state.
/// @returns -1 for information only state like help and version.
int parseArguments(int argc, char *argv[], po::variables_map *vm) noexcept
{
const char *usage = "Usage: scram-gui [options] [input-files]...";
po::options_description desc("Options");
// clang-format off
desc.add_options()
("help", "Display this help message")
("config-file", po::value<std::string>()->value_name("path"),
"Project configuration file");
// clang-format on
try {
po::store(po::parse_command_line(argc, argv, desc), *vm);
} catch (const std::exception &err) {
std::cerr << "Option error: " << err.what() << "\n\n"
<< usage << "\n\n"
<< desc << "\n";
return 1;
}
po::notify(*vm);
// Process command-line arguments.
if (vm->count("help")) {
std::cout << usage << "\n\n" << desc << "\n";
return -1;
}
desc.add_options()("input-files", po::value<std::vector<std::string>>());
po::positional_options_description p;
p.add("input-files", -1);
po::store(
po::command_line_parser(argc, argv).options(desc).positional(p).run(),
*vm);
po::notify(*vm);
return 0;
}
/// Produces critical notification dialog
/// for errors that are not expected to crash the application.
void notifyError(const QString &title, const QString &text,
const QString &detail = {}) noexcept
{
QMessageBox message(QMessageBox::Critical, title, text, QMessageBox::Ok);
message.setDetailedText(detail);
message.exec();
}
/// Guards the application from crashes on escaped internal exceptions.
class GuardedApplication : public QApplication
{
public:
using QApplication::QApplication;
bool notify(QObject *receiver, QEvent *event) override
{
try {
return QApplication::notify(receiver, event);
} catch (const scram::Error &err) {
std::string message = boost::diagnostic_information(err);
qCritical("%s", message.c_str());
notifyError(QStringLiteral("Internal SCRAM Error"),
QStringLiteral("Uncaught exception."),
QString::fromStdString(message));
} catch (const std::exception &err) {
qCritical("%s", err.what());
notifyError(QStringLiteral("Internal Exception Error"),
QStringLiteral("Uncaught foreign exception."),
QString::fromUtf8(err.what()));
} catch (...) {
qCritical("Unknown exception type.");
notifyError(QStringLiteral("Internal Exception Error"),
QStringLiteral("Unknown exception type."));
}
return false;
}
};
/// Installs translators to the main application.
///
/// @param[in,out] app The application to register translators.
///
/// @pre No application window has been created.
void installTranslators(GuardedApplication *app)
{
QString language = QSettings().value(QStringLiteral("language")).toString();
if (language.isEmpty())
language = QLocale::system().name();
if (language.startsWith(QStringLiteral("en")))
return; // The default language.
auto loadTs = [&app, &language](const char *domain, const QString &tsPath) {
auto *translator = new QTranslator(app);
if (translator->load(QStringLiteral("%1_%2").arg(
QString::fromLatin1(domain), language),
tsPath)) {
app->installTranslator(translator);
return true;
}
delete translator;
qCritical("Missing translations: %s_%s", domain,
language.toStdString().data());
return false;
};
auto scramTsPath = QString::fromStdString(scram::gui::translationsPath());
if (!loadTs("scramgui", scramTsPath))
return; // The language is not available or installed.
QString qtTsPath = QLibraryInfo::location(QLibraryInfo::TranslationsPath);
loadTs("qtbase", qtTsPath);
loadTs("qt", qtTsPath);
}
} // namespace
/// Command-line SCRAM GUI entrance.
///
/// @param[in] argc Argument count.
/// @param[in] argv Argument vector (including Qt args).
///
/// @returns 0 for success.
///
/// @note There are implicit Qt-specific options
/// (e.g., -style, -stylesheet, -platform, -widgetcount, -reverse).
/// These options are not listed in the help/usage of SCRAM GUI,
/// but they can be invoked for debugging or advanced GUI customization.
int main(int argc, char *argv[])
{
// Keep the following commented code!
// In some static build configurations,
// the resources may fail to load.
// However, the most distributions are expected to be shared builds,
// so the explicit load should not be used, but it is kept for debugging.
/* Q_INIT_RESOURCE(res); */
GuardedApplication app(argc, argv);
QCoreApplication::setOrganizationName(QStringLiteral("scram"));
QCoreApplication::setOrganizationDomain(QStringLiteral("scram-pra.org"));
QCoreApplication::setApplicationName(QStringLiteral("scram"));
QCoreApplication::setApplicationVersion(
QString::fromLatin1(scram::version::core()));
if (QIcon::themeName().isEmpty())
QIcon::setThemeName(QStringLiteral("tango"));
installTranslators(&app);
scram::gui::MainWindow w;
w.show();
if (argc > 1) {
po::variables_map vm;
int ret = parseArguments(argc, argv, &vm);
if (ret == 1)
return 1;
if (ret == -1)
return 0;
std::vector<std::string> inputFiles;
try {
if (vm.count("input-files"))
inputFiles = vm["input-files"].as<std::vector<std::string>>();
if (vm.count("config-file")) {
w.setConfig(vm["config-file"].as<std::string>(), inputFiles);
} else {
w.addInputFiles(inputFiles);
}
} catch (const boost::exception &) {
assert(false);
}
}
return app.exec();
}
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