PrismLauncher/logic/minecraft/MinecraftInstance.cpp

#include "MinecraftInstance.h"
#include <settings/Setting.h>
#include "settings/SettingsObject.h"
#include <pathutils.h>
#include "Env.h"
#include "minecraft/MinecraftVersionList.h"
#include <MMCStrings.h>

#define IBUS "@im=ibus"

// all of this because keeping things compatible with deprecated old settings
// if either of the settings {a, b} is true, this also resolves to true
class OrSetting : public Setting
{
	Q_OBJECT
public:
	OrSetting(QString id, std::shared_ptr<Setting> a, std::shared_ptr<Setting> b)
	:Setting({id}, false), m_a(a), m_b(b)
	{
	}
	virtual QVariant get() const
	{
		bool a = m_a->get().toBool();
		bool b = m_b->get().toBool();
		return a || b;
	}
	virtual void reset() {}
	virtual void set(QVariant value) {}
private:
	std::shared_ptr<Setting> m_a;
	std::shared_ptr<Setting> m_b;
};

MinecraftInstance::MinecraftInstance(SettingsObjectPtr globalSettings, SettingsObjectPtr settings, const QString &rootDir)
	: BaseInstance(globalSettings, settings, rootDir)
{
	// Java Settings
	auto javaOverride = m_settings->registerSetting("OverrideJava", false);
	auto locationOverride = m_settings->registerSetting("OverrideJavaLocation", false);
	auto javaOrLocation = std::make_shared<OrSetting>("JavaOrLocationOverride", javaOverride, locationOverride);
	m_settings->registerSetting("OverrideJavaArgs", false);
	m_settings->registerOverride(globalSettings->getSetting("JavaPath"));
	m_settings->registerOverride(globalSettings->getSetting("JvmArgs"));

	// special!
	m_settings->registerPassthrough(globalSettings->getSetting("JavaTimestamp"), javaOrLocation);
	m_settings->registerPassthrough(globalSettings->getSetting("JavaVersion"), javaOrLocation);

	// Window Size
	m_settings->registerSetting("OverrideWindow", false);
	m_settings->registerOverride(globalSettings->getSetting("LaunchMaximized"));
	m_settings->registerOverride(globalSettings->getSetting("MinecraftWinWidth"));
	m_settings->registerOverride(globalSettings->getSetting("MinecraftWinHeight"));

	// Memory
	m_settings->registerSetting("OverrideMemory", false);
	m_settings->registerOverride(globalSettings->getSetting("MinMemAlloc"));
	m_settings->registerOverride(globalSettings->getSetting("MaxMemAlloc"));
	m_settings->registerOverride(globalSettings->getSetting("PermGen"));
}

QString MinecraftInstance::minecraftRoot() const
{
	QFileInfo mcDir(PathCombine(instanceRoot(), "minecraft"));
	QFileInfo dotMCDir(PathCombine(instanceRoot(), ".minecraft"));

	if (dotMCDir.exists() && !mcDir.exists())
		return dotMCDir.filePath();
	else
		return mcDir.filePath();
}

std::shared_ptr< BaseVersionList > MinecraftInstance::versionList() const
{
	return ENV.getVersionList("net.minecraft");
}

QStringList MinecraftInstance::javaArguments() const
{
	QStringList args;

	// custom args go first. we want to override them if we have our own here.
	args.append(extraArguments());

	// OSX dock icon and name
#ifdef Q_OS_MAC
	args << "-Xdock:icon=icon.png";
	args << QString("-Xdock:name=\"%1\"").arg(windowTitle());
#endif

	// HACK: Stupid hack for Intel drivers. See: https://mojang.atlassian.net/browse/MCL-767
#ifdef Q_OS_WIN32
	args << QString("-XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_"
					"minecraft.exe.heapdump");
#endif

	args << QString("-Xms%1m").arg(settings()->get("MinMemAlloc").toInt());
	args << QString("-Xmx%1m").arg(settings()->get("MaxMemAlloc").toInt());

	// No PermGen in newer java.
	auto javaVersion = settings()->get("JavaVersion");
	if(Strings::naturalCompare(javaVersion.toString(), "1.8.0", Qt::CaseInsensitive) < 0)
	{
		auto permgen = settings()->get("PermGen").toInt();
		if (permgen != 64)
		{
			args << QString("-XX:PermSize=%1m").arg(permgen);
		}
	}

	args << "-Duser.language=en";
	args << "-jar" << PathCombine(QCoreApplication::applicationDirPath(), "jars", "NewLaunch.jar");

	return args;
}

QMap<QString, QString> MinecraftInstance::getVariables() const
{
	QMap<QString, QString> out;
	out.insert("INST_NAME", name());
	out.insert("INST_ID", id());
	out.insert("INST_DIR", QDir(instanceRoot()).absolutePath());
	out.insert("INST_MC_DIR", QDir(minecraftRoot()).absolutePath());
	out.insert("INST_JAVA", settings()->get("JavaPath").toString());
	out.insert("INST_JAVA_ARGS", javaArguments().join(' '));
	return out;
}

QProcessEnvironment MinecraftInstance::createEnvironment()
{
	// prepare the process environment
	QProcessEnvironment rawenv = QProcessEnvironment::systemEnvironment();
	QProcessEnvironment env;

	QStringList ignored =
	{
		"JAVA_ARGS",
		"CLASSPATH",
		"CONFIGPATH",
		"JAVA_HOME",
		"JRE_HOME",
		"_JAVA_OPTIONS",
		"JAVA_OPTIONS",
		"JAVA_TOOL_OPTIONS"
	};
	for(auto key: rawenv.keys())
	{
		auto value = rawenv.value(key);
		// filter out dangerous java crap
		if(ignored.contains(key))
		{
			qDebug() << "Env: ignoring" << key << value;
			continue;
		}
		// filter MultiMC-related things
		if(key.startsWith("QT_"))
		{
			qDebug() << "Env: ignoring" << key << value;
			continue;
		}
#ifdef Q_OS_LINUX
		// Do not pass LD_* variables to java. They were intended for MultiMC
		if(key.startsWith("LD_"))
		{
			qDebug() << "Env: ignoring" << key << value;
			continue;
		}
		// Strip IBus
		// IBus is a Linux IME framework. For some reason, it breaks MC?
		if (key == "XMODIFIERS" && value.contains(IBUS))
		{
			QString save = value;
			value.replace(IBUS, "");
			qDebug() << "Env: stripped" << IBUS << "from" << save << ":" << value;
		}
		if(key == "GAME_PRELOAD")
		{
			env.insert("LD_PRELOAD", value);
			continue;
		}
		if(key == "GAME_LIBRARY_PATH")
		{
			env.insert("LD_LIBRARY_PATH", value);
			continue;
		}
#endif
		qDebug() << "Env: " << key << value;
		env.insert(key, value);
	}
#ifdef Q_OS_LINUX
	// HACK: Workaround for QTBUG42500
	if(!env.contains("LD_LIBRARY_PATH"))
	{
		env.insert("LD_LIBRARY_PATH", "");
	}
#endif

	// export some infos
	auto variables = getVariables();
	for (auto it = variables.begin(); it != variables.end(); ++it)
	{
		env.insert(it.key(), it.value());
	}
	return env;
}

#include "MinecraftInstance.moc"