////  ScriptEngineQtScript.cpp//  libraries/script-engine/src/qtscript////  Created by Brad Hefta-Gaub on 12/14/13.//  Copyright 2013 High Fidelity, Inc.////  Distributed under the Apache License, Version 2.0.//  See the accompanying file LICENSE or http://www.apache.org/licenses/LICENSE-2.0.html// #include "ScriptEngineQtScript.h" #include <chrono>#include <thread> #include <QtCore/QCoreApplication>#include <QtCore/QEventLoop>#include <QtCore/QFileInfo>#include <QtCore/QTimer>#include <QtCore/QThread>#include <QtCore/QRegularExpression> #include <QtCore/QFuture>#include <QtConcurrent/QtConcurrentRun> #include <QtWidgets/QMainWindow>#include <QtWidgets/QApplication>#include <QtWidgets/QMenuBar>#include <QtWidgets/QMenu> #include <QtNetwork/QNetworkRequest>#include <QtNetwork/QNetworkReply> #include <QtScript/QScriptContextInfo>#include <QtScript/QScriptValue>#include <QtScript/QScriptValueIterator> #include <QtScriptTools/QScriptEngineDebugger> #include <shared/LocalFileAccessGate.h>#include <shared/QtHelpers.h>#include <shared/AbstractLoggerInterface.h> #include <Profile.h> #include "../ScriptEngineLogging.h"#include "../ScriptProgram.h"#include "../ScriptValue.h" #include "ScriptContextQtWrapper.h"#include "ScriptProgramQtWrapper.h"#include "ScriptValueQtWrapper.h" static const int MAX_MODULE_ID_LENGTH { 4096 };static const int MAX_DEBUG_VALUE_LENGTH { 80 }; static const QScriptEngine::QObjectWrapOptions DEFAULT_QOBJECT_WRAP_OPTIONS =                QScriptEngine::ExcludeDeleteLater | QScriptEngine::ExcludeChildObjects;static const QScriptValue::PropertyFlags READONLY_PROP_FLAGS { QScriptValue::ReadOnly | QScriptValue::Undeletable };static const QScriptValue::PropertyFlags READONLY_HIDDEN_PROP_FLAGS { READONLY_PROP_FLAGS | QScriptValue::SkipInEnumeration }; static const bool HIFI_AUTOREFRESH_FILE_SCRIPTS { true }; Q_DECLARE_METATYPE(QScriptEngine::FunctionSignature)int qfunctionSignatureMetaID = qRegisterMetaType<QScriptEngine::FunctionSignature>(); int scriptEnginePointerMetaID = qRegisterMetaType<ScriptEngineQtScriptPointer>(); bool ScriptEngineQtScript::IS_THREADSAFE_INVOCATION(const QThread* thread, const QString& method) {    if (QThread::currentThread() == thread) {        return true;    }    qCCritical(scriptengine) << QString("Scripting::%1 @ %2 -- ignoring thread-unsafe call from %3")                              .arg(method)                              .arg(thread ? thread->objectName() : "(!thread)")                              .arg(QThread::currentThread()->objectName());    qCDebug(scriptengine) << "(please resolve on the calling side by using invokeMethod, executeOnScriptThread, etc.)";    Q_ASSERT(false);    return false;} // engine-aware JS Error copier and factoryQScriptValue ScriptEngineQtScript::makeError(const QScriptValue& _other, const QString& type) {    if (!IS_THREADSAFE_INVOCATION(thread(), __FUNCTION__)) {        return QScriptEngine::nullValue();    }    auto other = _other;    if (other.isString()) {        other = QScriptEngine::newObject();        other.setProperty("message", _other.toString());    }    auto proto = QScriptEngine::globalObject().property(type);    if (!proto.isFunction()) {        proto = QScriptEngine::globalObject().property(other.prototype().property("constructor").property("name").toString());    }    if (!proto.isFunction()) {#ifdef DEBUG_JS_EXCEPTIONS        qCDebug(shared) << "BaseScriptEngine::makeError -- couldn't find constructor for" << type << " -- using Error instead";#endif        proto = QScriptEngine::globalObject().property("Error");    }    if (other.engine() != this) {        // JS Objects are parented to a specific script engine instance        // -- this effectively ~clones it locally by routing through a QVariant and back        other = QScriptEngine::toScriptValue(other.toVariant());    }    // ~ var err = new Error(other.message)    auto err = proto.construct(QScriptValueList({ other.property("message") }));     // transfer over any existing properties    QScriptValueIterator it(other);    while (it.hasNext()) {        it.next();        err.setProperty(it.name(), it.value());    }    return err;} ScriptValuePointer ScriptEngineQtScript::makeError(const ScriptValuePointer& _other, const QString& type) {    if (!IS_THREADSAFE_INVOCATION(thread(), __FUNCTION__)) {        return nullValue();    }    ScriptValueQtWrapper* unwrapped = ScriptValueQtWrapper::unwrap(_other);    QScriptValue other;    if (_other->isString()) {        other = QScriptEngine::newObject();        other.setProperty("message", _other->toString());    } else if (unwrapped) {        other = unwrapped->toQtValue();    } else {        other = QScriptEngine::newVariant(_other->toVariant());    }    QScriptValue result = makeError(other, type);    return ScriptValuePointer(new ScriptValueQtWrapper(this, std::move(result)));} // check syntax and when there are issues returns an actual "SyntaxError" with the detailsScriptValuePointer ScriptEngineQtScript::lintScript(const QString& sourceCode, const QString& fileName, const int lineNumber) {    if (!IS_THREADSAFE_INVOCATION(thread(), __FUNCTION__)) {        return nullValue();    }    const auto syntaxCheck = checkSyntax(sourceCode);    if (syntaxCheck.state() != QScriptSyntaxCheckResult::Valid) {        auto err = QScriptEngine::globalObject().property("SyntaxError").construct(QScriptValueList({ syntaxCheck.errorMessage() }));        err.setProperty("fileName", fileName);        err.setProperty("lineNumber", syntaxCheck.errorLineNumber());        err.setProperty("expressionBeginOffset", syntaxCheck.errorColumnNumber());        err.setProperty("stack", currentContext()->backtrace().join(ScriptManager::SCRIPT_BACKTRACE_SEP));        {            const auto error = syntaxCheck.errorMessage();            const auto line = QString::number(syntaxCheck.errorLineNumber());            const auto column = QString::number(syntaxCheck.errorColumnNumber());            // for compatibility with legacy reporting            const auto message = QString("[SyntaxError] %1 in %2:%3(%4)").arg(error, fileName, line, column);            err.setProperty("formatted", message);        }        return ScriptValuePointer(new ScriptValueQtWrapper(this, std::move(err)));    }    return undefinedValue();} // this pulls from the best available information to create a detailed snapshot of the current exceptionScriptValuePointer ScriptEngineQtScript::cloneUncaughtException(const QString& extraDetail) {    if (!IS_THREADSAFE_INVOCATION(thread(), __FUNCTION__)) {        return nullValue();    }    if (!hasUncaughtException()) {        return nullValue();    }    auto exception = uncaughtException();    // ensure the error object is engine-local    auto err = makeError(exception);     // not sure why Qt does't offer uncaughtExceptionFileName -- but the line number    // on its own is often useless/wrong if arbitrarily married to a filename.    // when the error object already has this info, it seems to be the most reliable    auto fileName = exception->property("fileName")->toString();    auto lineNumber = exception->property("lineNumber")->toInt32();     // the backtrace, on the other hand, seems most reliable taken from uncaughtExceptionBacktrace    auto backtrace = uncaughtExceptionBacktrace();    if (backtrace.isEmpty()) {        // fallback to the error object        backtrace = exception->property("stack")->toString().split(ScriptManager::SCRIPT_BACKTRACE_SEP);    }    // the ad hoc "detail" property can be used now to embed additional clues    auto detail = exception->property("detail")->toString();    if (detail.isEmpty()) {        detail = extraDetail;    } else if (!extraDetail.isEmpty()) {        detail += "(" + extraDetail + ")";    }    if (lineNumber <= 0) {        lineNumber = uncaughtExceptionLineNumber();    }    if (fileName.isEmpty()) {        // climb the stack frames looking for something useful to display        for (auto c = QScriptEngine::currentContext(); c && fileName.isEmpty(); c = c->parentContext()) {            QScriptContextInfo info{ c };            if (!info.fileName().isEmpty()) {                // take fileName:lineNumber as a pair                fileName = info.fileName();                lineNumber = info.lineNumber();                if (backtrace.isEmpty()) {                    backtrace = c->backtrace();                }                break;            }        }    }    err->setProperty("fileName", fileName);    err->setProperty("lineNumber", lineNumber);    err->setProperty("detail", detail);    err->setProperty("stack", backtrace.join(ScriptManager::SCRIPT_BACKTRACE_SEP)); #ifdef DEBUG_JS_EXCEPTIONS    err->setProperty("_fileName", exception.property("fileName").toString());    err->setProperty("_stack", uncaughtExceptionBacktrace().join(SCRIPT_BACKTRACE_SEP));    err->setProperty("_lineNumber", uncaughtExceptionLineNumber());#endif    return err;} bool ScriptEngineQtScript::raiseException(const QScriptValue& exception) {    if (!IS_THREADSAFE_INVOCATION(thread(), __FUNCTION__)) {        return false;    }    if (QScriptEngine::currentContext()) {        // we have an active context / JS stack frame so throw the exception per usual        QScriptEngine::currentContext()->throwValue(makeError(exception));        return true;    } else if(_manager) {        // we are within a pure C++ stack frame (ie: being called directly by other C++ code)        // in this case no context information is available so just emit the exception for reporting        QScriptValue thrown = makeError(exception);        emit _manager->unhandledException(ScriptValuePointer(new ScriptValueQtWrapper(this, std::move(thrown))));    }    return false;} bool ScriptEngineQtScript::maybeEmitUncaughtException(const QString& debugHint) {    if (!IS_THREADSAFE_INVOCATION(thread(), __FUNCTION__)) {        return false;    }    if (!isEvaluating() && hasUncaughtException() && _manager) {        emit _manager->unhandledException(cloneUncaughtException(debugHint));        clearExceptions();        return true;    }    return false;} // LambdaQScriptValue ScriptEngineQtScript::newLambdaFunction(std::function<QScriptValue(QScriptContext*, ScriptEngineQtScript*)> operation,                                                 const QScriptValue& data,                                                 const QScriptEngine::ValueOwnership& ownership) {    auto lambda = new Lambda(this, operation, data);    auto object = QScriptEngine::newQObject(lambda, ownership);    auto call = object.property("call");    call.setPrototype(object);  // context->callee().prototype() === Lambda QObject    call.setData(data);         // context->callee().data() will === data param    return call;}QString Lambda::toString() const {    return QString("[Lambda%1]").arg(data.isValid() ? " " + data.toString() : data.toString());} Lambda::~Lambda() {#ifdef DEBUG_JS_LAMBDA_FUNCS    qDebug() << "~Lambda"             << "this" << this;#endif} Lambda::Lambda(ScriptEngineQtScript* engine,               std::function<QScriptValue(QScriptContext*, ScriptEngineQtScript*)> operation,               QScriptValue data) :    engine(engine),    operation(operation), data(data) {#ifdef DEBUG_JS_LAMBDA_FUNCS    qDebug() << "Lambda" << data.toString();#endif}QScriptValue Lambda::call() {    if (!engine->IS_THREADSAFE_INVOCATION(__FUNCTION__)) {        return static_cast<QScriptEngine*>(engine)->nullValue();    }    return operation(static_cast<QScriptEngine*>(engine)->currentContext(), engine);} #ifdef DEBUG_JSvoid ScriptEngineQtScript::_debugDump(const QString& header, const QScriptValue& object, const QString& footer) {    if (!IS_THREADSAFE_INVOCATION(thread(), __FUNCTION__)) {        return;    }    if (!header.isEmpty()) {        qCDebug(shared) << header;    }    if (!object.isObject()) {        qCDebug(shared) << "(!isObject)" << object.toVariant().toString() << object.toString();        return;    }    QScriptValueIterator it(object);    while (it.hasNext()) {        it.next();        qCDebug(shared) << it.name() << ":" << it.value().toString();    }    if (!footer.isEmpty()) {        qCDebug(shared) << footer;    }}#endif static QScriptValue debugPrint(QScriptContext* context, QScriptEngine* engine) {    // assemble the message by concatenating our arguments    QString message = "";    for (int i = 0; i < context->argumentCount(); i++) {        if (i > 0) {            message += " ";        }        message += context->argument(i).toString();    }     // was this generated by a script engine? If we don't recognize it then send the message and exit    ScriptEngineQtScript* scriptEngine = qobject_cast<ScriptEngineQtScript*>(engine);    if (!scriptEngine) {        qCDebug(scriptengine_script, "%s", qUtf8Printable(message));        return QScriptValue();    }     QString filename;    auto scriptManager = scriptEngine->manager();    if (scriptManager) {        filename = scriptManager->getFilename();    }     // This message was sent by one of our script engines, let's try to see if we can find the source.    // Note that the first entry in the backtrace should be "print" and is somewhat useless to us    AbstractLoggerInterface* loggerInterface = AbstractLoggerInterface::get();    if (loggerInterface && loggerInterface->showSourceDebugging()) {        QScriptContext* userContext = context;        while (userContext && QScriptContextInfo(userContext).functionType() == QScriptContextInfo::NativeFunction) {            userContext = userContext->parentContext();        }        QString location;        if (userContext) {            QScriptContextInfo contextInfo(userContext);            QString fileName = contextInfo.fileName();            int lineNumber = contextInfo.lineNumber();            QString functionName = contextInfo.functionName();                location = functionName;            if (!fileName.isEmpty()) {                if (location.isEmpty()) {                    location = fileName;                } else {                    location = QString("%1 at %2").arg(location).arg(fileName);                }            }            if (lineNumber != -1) {                location = QString("%1:%2").arg(location).arg(lineNumber);            }        }        if (location.isEmpty()) {            location = filename;        }            // give the script engine a chance to notify the system about this message        scriptEngine->print(message);            // send the message to debug log        qCDebug(scriptengine_script, "[%s] %s", qUtf8Printable(location), qUtf8Printable(message));    } else {        scriptEngine->print(message);        // prefix the script engine name to help disambiguate messages in the main debug log        qCDebug(scriptengine_script, "[%s] %s", qUtf8Printable(filename), qUtf8Printable(message));    }     return QScriptValue();} ScriptEngineQtScript::ScriptEngineQtScript(ScriptManager* scriptManager) :    QScriptEngine(),    _manager(scriptManager),    _arrayBufferClass(new ArrayBufferClass(this)){    if (_manager) {        connect(this, &QScriptEngine::signalHandlerException, this, [this](const QScriptValue& exception) {            if (hasUncaughtException()) {                // the engine's uncaughtException() seems to produce much better stack traces here                emit _manager->unhandledException(cloneUncaughtException("signalHandlerException"));                clearExceptions();            } else {                // ... but may not always be available -- so if needed we fallback to the passed exception                QScriptValue thrown = makeError(exception);                emit _manager->unhandledException(ScriptValuePointer(new ScriptValueQtWrapper(this, std::move(thrown))));            }        }, Qt::DirectConnection);    }     QScriptValue null = QScriptEngine::nullValue();    _nullValue = ScriptValuePointer(new ScriptValueQtWrapper(const_cast<ScriptEngineQtScript*>(this), std::move(null)));     QScriptValue undefined = QScriptEngine::undefinedValue();    _undefinedValue = ScriptValuePointer(new ScriptValueQtWrapper(const_cast<ScriptEngineQtScript*>(this), std::move(undefined)));     QScriptEngine::setProcessEventsInterval(MSECS_PER_SECOND);} bool ScriptEngineQtScript::isDebugMode() const {#if defined(DEBUG)    return true;#else    return false;#endif} ScriptEngineQtScript::~ScriptEngineQtScript() {} void ScriptEngineQtScript::disconnectNonEssentialSignals() {    disconnect();    QThread* workerThread;    // Ensure the thread should be running, and does exist    if (_isRunning && _isThreaded && (workerThread = QScriptEngine::thread())) {        connect(this, &QObject::destroyed, workerThread, &QThread::quit);        connect(workerThread, &QThread::finished, workerThread, &QObject::deleteLater);    }} void ScriptEngineQtScript::executeOnScriptThread(std::function<void()> function, const Qt::ConnectionType& type ) {    if (QThread::currentThread() != QScriptEngine::thread()) {        QMetaObject::invokeMethod(this, "executeOnScriptThread", type, Q_ARG(std::function<void()>, function));        return;    }     function();} void ScriptEngineQtScript::registerEnum(const QString& enumName, QMetaEnum newEnum) {    if (!newEnum.isValid()) {        qCCritical(scriptengine) << "registerEnum called on invalid enum with name " << enumName;        return;    }     for (int i = 0; i < newEnum.keyCount(); i++) {        const char* keyName = newEnum.key(i);        QString fullName = enumName + "." + keyName;        registerValue(fullName, newEnum.keyToValue(keyName));    }} void ScriptEngineQtScript::registerValue(const QString& valueName, QScriptValue value) {    if (QThread::currentThread() != QScriptEngine::thread()) {#ifdef THREAD_DEBUGGING        qCDebug(scriptengine) << "*** WARNING *** ScriptEngineQtScript::registerValue() called on wrong thread [" << QThread::currentThread() << "], invoking on correct thread [" << thread() << "]";#endif        QMetaObject::invokeMethod(this, "registerValue",                                  Q_ARG(const QString&, valueName),                                  Q_ARG(QScriptValue, value));        return;    }     QStringList pathToValue = valueName.split(".");    int partsToGo = pathToValue.length();    QScriptValue partObject = globalObject();     for (const auto& pathPart : pathToValue) {        partsToGo--;        if (!partObject.property(pathPart).isValid()) {            if (partsToGo > 0) {                //QObject *object = new QObject;                QScriptValue partValue = newArray(); //newQObject(object, QScriptEngine::ScriptOwnership);                partObject.setProperty(pathPart, partValue);            } else {                partObject.setProperty(pathPart, value);            }        }        partObject = partObject.property(pathPart);    }} void ScriptEngineQtScript::registerGlobalObject(const QString& name, QObject* object) {    if (QThread::currentThread() != QScriptEngine::thread()) {#ifdef THREAD_DEBUGGING        qCDebug(scriptengine) << "*** WARNING *** ScriptEngineQtScript::registerGlobalObject() called on wrong thread [" << QThread::currentThread() << "], invoking on correct thread [" << thread() << "]  name:" << name;#endif        QMetaObject::invokeMethod(this, "registerGlobalObject",                                  Q_ARG(const QString&, name),                                  Q_ARG(QObject*, object));        return;    }#ifdef THREAD_DEBUGGING    qCDebug(scriptengine) << "ScriptEngineQtScript::registerGlobalObject() called on thread [" << QThread::currentThread() << "] name:" << name;#endif     if (!QScriptEngine::globalObject().property(name).isValid()) {        if (object) {            QScriptValue value = QScriptEngine::newQObject(object, QScriptEngine::QtOwnership, DEFAULT_QOBJECT_WRAP_OPTIONS);            QScriptEngine::globalObject().setProperty(name, value);

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