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**
** This file is part of the QtQml module of the Qt Toolkit.
**
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** General Public License version 2.1 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL included in the
** packaging of this file.  Please review the following information to
** ensure the GNU Lesser General Public License version 2.1 requirements
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** Alternatively, this file may be used under the terms of the GNU
** General Public License version 3.0 as published by the Free Software
** Foundation and appearing in the file LICENSE.GPL included in the
** packaging of this file.  Please review the following information to
** ensure the GNU General Public License version 3.0 requirements will be
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****************************************************************************/

#include "qv4debugging_p.h"
#include "qv4object_p.h"
#include "qv4functionobject_p.h"
#include "qv4function_p.h"
#include "qv4instr_moth_p.h"
#include "qv4runtime_p.h"
#include <iostream>

#include <algorithm>

using namespace QV4;
using namespace QV4::Debugging;

namespace {
class EvalJob: public Debugger::Job
{
    QV4::ExecutionEngine *engine;
    const QString &script;

public:
    EvalJob(QV4::ExecutionEngine *engine, const QString &script)
        : engine(engine)
        , script(script)
    {}

    ~EvalJob() {}

    void run()
    {
        // TODO
        qDebug() << "Evaluating script:" << script;
        Q_UNUSED(engine);
    }

    bool resultAsBoolean() const
    {
        return true;
    }
};

class GatherSourcesJob: public Debugger::Job
{
    QV4::ExecutionEngine *engine;
    const int seq;

public:
    GatherSourcesJob(QV4::ExecutionEngine *engine, int seq)
        : engine(engine)
        , seq(seq)
    {}

    ~GatherSourcesJob() {}

    void run()
    {
        QStringList sources;

        foreach (QV4::CompiledData::CompilationUnit *unit, engine->compilationUnits) {
            QString fileName = unit->fileName();
            if (!fileName.isEmpty())
                sources.append(fileName);
        }

        Debugger *debugger = engine->debugger;
        QMetaObject::invokeMethod(debugger->agent(), "sourcesCollected", Qt::QueuedConnection,
                                  Q_ARG(QV4::Debugging::Debugger*, debugger),
                                  Q_ARG(QStringList, sources),
                                  Q_ARG(int, seq));
    }
};
}

Debugger::Debugger(QV4::ExecutionEngine *engine)
    : m_engine(engine)
    , m_agent(0)
    , m_state(Running)
    , m_pauseRequested(false)
    , m_gatherSources(0)
    , m_havePendingBreakPoints(false)
    , m_currentInstructionPointer(0)
    , m_stepping(NotStepping)
    , m_stopForStepping(false)
    , m_returnedValue(Primitive::undefinedValue())
    , m_breakOnThrow(false)
    , m_runningJob(0)
{
    qMetaTypeId<Debugger*>();
    qMetaTypeId<PauseReason>();
}

Debugger::~Debugger()
{
    detachFromAgent();
}

void Debugger::attachToAgent(DebuggerAgent *agent)
{
    Q_ASSERT(!m_agent);
    m_agent = agent;
}

void Debugger::detachFromAgent()
{
    DebuggerAgent *agent = 0;
    {
        QMutexLocker locker(&m_lock);
        agent = m_agent;
        m_agent = 0;
    }
    if (agent)
        agent->removeDebugger(this);
}

void Debugger::gatherSources(int requestSequenceNr)
{
    QMutexLocker locker(&m_lock);

    m_gatherSources = new GatherSourcesJob(m_engine, requestSequenceNr);
    if (m_state == Paused) {
        runInEngine_havingLock(m_gatherSources);
        delete m_gatherSources;
        m_gatherSources = 0;
    }
}

void Debugger::pause()
{
    QMutexLocker locker(&m_lock);
    if (m_state == Paused)
        return;
    m_pauseRequested = true;
}

void Debugger::resume(Speed speed)
{
    QMutexLocker locker(&m_lock);
    if (m_state != Paused)
        return;

    if (!m_returnedValue.isUndefined())
        m_returnedValue = Primitive::undefinedValue();

    clearTemporaryBreakPoints();
    if (speed == StepOver)
        setTemporaryBreakPointOnNextLine();
    if (speed == StepOut)
        m_temporaryBreakPoints = TemporaryBreakPoint(getFunction(), m_engine->currentContext());

    m_stepping = speed;
    m_runningCondition.wakeAll();
}

void Debugger::addBreakPoint(const QString &fileName, int lineNumber, const QString &condition)
{
    QMutexLocker locker(&m_lock);
    if (!m_pendingBreakPointsToRemove.remove(fileName, lineNumber))
        m_pendingBreakPointsToAdd.add(fileName, lineNumber);
    m_havePendingBreakPoints = !m_pendingBreakPointsToAdd.isEmpty() || !m_pendingBreakPointsToRemove.isEmpty();
    if (!condition.isEmpty())
        m_breakPointConditions.add(fileName, lineNumber, condition);
}

void Debugger::removeBreakPoint(const QString &fileName, int lineNumber)
{
    QMutexLocker locker(&m_lock);
    if (!m_pendingBreakPointsToAdd.remove(fileName, lineNumber))
        m_pendingBreakPointsToRemove.add(fileName, lineNumber);
    m_havePendingBreakPoints = !m_pendingBreakPointsToAdd.isEmpty() || !m_pendingBreakPointsToRemove.isEmpty();
    m_breakPointConditions.remove(fileName, lineNumber);
}

void Debugger::setBreakOnThrow(bool onoff)
{
    QMutexLocker locker(&m_lock);

    m_breakOnThrow = onoff;
}

Debugger::ExecutionState Debugger::currentExecutionState(const uchar *code) const
{
    if (!code)
        code = m_currentInstructionPointer;
    // ### Locking
    ExecutionState state;

    state.function = getFunction();
    state.fileName = state.function->sourceFile();

    qptrdiff relativeProgramCounter = code - state.function->codeData;
    state.lineNumber = state.function->lineNumberForProgramCounter(relativeProgramCounter);

    return state;
}

void Debugger::setPendingBreakpoints(Function *function)
{
    m_pendingBreakPointsToAddToFutureCode.applyToFunction(function, /*removeBreakPoints*/ false);
}

QVector<StackFrame> Debugger::stackTrace(int frameLimit) const
{
    return m_engine->stackTrace(frameLimit);
}

static inline CallContext *findContext(ExecutionContext *ctxt, int frame)
{
    while (ctxt) {
        CallContext *cCtxt = ctxt->asCallContext();
        if (cCtxt && cCtxt->function) {
            if (frame < 1)
                return cCtxt;
            --frame;
        }
        ctxt = ctxt->parent;
    }

    return 0;
}

static inline CallContext *findScope(ExecutionContext *ctxt, int scope)
{
    for (; scope > 0 && ctxt; --scope)
        ctxt = ctxt->outer;

    return ctxt ? ctxt->asCallContext() : 0;
}

void Debugger::collectArgumentsInContext(Collector *collector, int frameNr, int scopeNr)
{
    if (state() != Paused)
        return;

    class ArgumentCollectJob: public Job
    {
        QV4::ExecutionEngine *engine;
        Collector *collector;
        int frameNr;
        int scopeNr;

    public:
        ArgumentCollectJob(QV4::ExecutionEngine *engine, Collector *collector, int frameNr, int scopeNr)
            : engine(engine)
            , collector(collector)
            , frameNr(frameNr)
            , scopeNr(scopeNr)
        {}

        ~ArgumentCollectJob() {}

        void run()
        {
            if (frameNr < 0)
                return;

            CallContext *ctxt = findScope(findContext(engine->currentContext(), frameNr), scopeNr);
            if (!ctxt)
                return;

            Scope scope(engine);
            ScopedValue v(scope);
            int nFormals = ctxt->formalCount();
            for (unsigned i = 0, ei = nFormals; i != ei; ++i) {
                QString qName;
                if (String *name = ctxt->formals()[nFormals - i - 1])
                    qName = name->toQString();
                v = ctxt->argument(i);
                collector->collect(qName, v);
            }
        }
    };

    ArgumentCollectJob job(m_engine, collector, frameNr, scopeNr);
    runInEngine(&job);
}

/// Same as \c retrieveArgumentsFromContext, but now for locals.
void Debugger::collectLocalsInContext(Collector *collector, int frameNr, int scopeNr)
{
    if (state() != Paused)
        return;

    class LocalCollectJob: public Job
    {
        QV4::ExecutionEngine *engine;
        Collector *collector;
        int frameNr;
        int scopeNr;

    public:
        LocalCollectJob(QV4::ExecutionEngine *engine, Collector *collector, int frameNr, int scopeNr)
            : engine(engine)
            , collector(collector)
            , frameNr(frameNr)
            , scopeNr(scopeNr)
        {}

        void run()
        {
            if (frameNr < 0)
                return;

            CallContext *ctxt = findScope(findContext(engine->currentContext(), frameNr), scopeNr);
            if (!ctxt)
                return;

            Scope scope(engine);
            ScopedValue v(scope);
            for (unsigned i = 0, ei = ctxt->variableCount(); i != ei; ++i) {
                QString qName;
                if (String *name = ctxt->variables()[i])
                    qName = name->toQString();
                v = ctxt->locals[i];
                collector->collect(qName, v);
            }
        }
    };

    LocalCollectJob job(m_engine, collector, frameNr, scopeNr);
    runInEngine(&job);
}

bool Debugger::collectThisInContext(Debugger::Collector *collector, int frame)
{
    if (state() != Paused)
        return false;

    class ThisCollectJob: public Job
    {
        QV4::ExecutionEngine *engine;
        Collector *collector;
        int frameNr;
        bool *foundThis;

    public:
        ThisCollectJob(QV4::ExecutionEngine *engine, Collector *collector, int frameNr, bool *foundThis)
            : engine(engine)
            , collector(collector)
            , frameNr(frameNr)
            , foundThis(foundThis)
        {}

        void run()
        {
            *foundThis = myRun();
        }

        bool myRun()
        {
            ExecutionContext *ctxt = findContext(engine->currentContext(), frameNr);
            while (ctxt) {
                if (CallContext *cCtxt = ctxt->asCallContext())
                    if (cCtxt->activation)
                        break;
                ctxt = ctxt->outer;
            }

            if (!ctxt)
                return false;

            Scope scope(engine);
            ScopedObject o(scope, ctxt->asCallContext()->activation);
            collector->collect(o);
            return true;
        }
    };

    bool foundThis = false;
    ThisCollectJob job(m_engine, collector, frame, &foundThis);
    runInEngine(&job);
    return foundThis;
}

void Debugger::collectThrownValue(Collector *collector)
{
    if (state() != Paused || !m_engine->hasException)
        return;

    class ThisCollectJob: public Job
    {
        QV4::ExecutionEngine *engine;
        Collector *collector;

    public:
        ThisCollectJob(QV4::ExecutionEngine *engine, Collector *collector)
            : engine(engine)
            , collector(collector)
        {}

        void run()
        {
            Scope scope(engine);
            ScopedValue v(scope, engine->exceptionValue);
            collector->collect(QStringLiteral("exception"), v);
        }
    };

    ThisCollectJob job(m_engine, collector);
    runInEngine(&job);
}

void Debugger::collectReturnedValue(Collector *collector) const
{
    if (state() != Paused)
        return;

    Scope scope(m_engine);
    ScopedObject o(scope, m_returnedValue);
    collector->collect(o);
}

QVector<ExecutionContext::ContextType> Debugger::getScopeTypes(int frame) const
{
    QVector<ExecutionContext::ContextType> types;

    if (state() != Paused)
        return types;

    CallContext *sctxt = findContext(m_engine->currentContext(), frame);
    if (!sctxt || sctxt->type < ExecutionContext::Type_SimpleCallContext)
        return types;
    CallContext *ctxt = static_cast<CallContext *>(sctxt);

    for (ExecutionContext *it = ctxt; it; it = it->outer)
        types.append(it->type);

    return types;
}

void Debugger::maybeBreakAtInstruction(const uchar *code, bool breakPointHit)
{
    if (m_runningJob) // do not re-enter when we're doing a job for the debugger.
        return;

    QMutexLocker locker(&m_lock);
    m_currentInstructionPointer = code;

    ExecutionState state = currentExecutionState();

    // Do debugger internal work
    if (m_havePendingBreakPoints) {
        if (breakPointHit)
            breakPointHit = !m_pendingBreakPointsToRemove.contains(state.fileName, state.lineNumber);

        applyPendingBreakPoints();
    }

    if (m_gatherSources) {
        m_gatherSources->run();
        delete m_gatherSources;
        m_gatherSources = 0;
    }

    if (m_stopForStepping) {
        clearTemporaryBreakPoints();
        m_stopForStepping = false;
        m_pauseRequested = false;
        pauseAndWait(Step);
    } else if (m_pauseRequested) { // Serve debugging requests from the agent
        m_pauseRequested = false;
        pauseAndWait(PauseRequest);
    } else if (breakPointHit) {
        if (m_stepping == StepOver && m_temporaryBreakPoints.context == m_engine->currentContext())
            pauseAndWait(Step);
        else if (reallyHitTheBreakPoint(state.fileName, state.lineNumber))
            pauseAndWait(BreakPoint);
    }

    if (!m_pendingBreakPointsToAdd.isEmpty() || !m_pendingBreakPointsToRemove.isEmpty())
        applyPendingBreakPoints();
}

void Debugger::enteringFunction()
{
    QMutexLocker locker(&m_lock);

    if (m_stepping == StepIn) {
        m_stepping = NotStepping;
        m_stopForStepping = true;
        m_pauseRequested = true;
    }
}

void Debugger::leavingFunction(const ReturnedValue &retVal)
{
    Q_UNUSED(retVal); // TODO

    QMutexLocker locker(&m_lock);

    if ((m_stepping == StepOut || m_stepping == StepOver)
            && temporaryBreakPointInFunction(m_engine->currentContext())) {
        clearTemporaryBreakPoints();
        m_stepping = NotStepping;
        m_stopForStepping = true;
        m_pauseRequested = true;
        m_returnedValue = retVal;
    }
}

void Debugger::aboutToThrow()
{
    if (!m_breakOnThrow)
        return;

    if (m_runningJob) // do not re-enter when we're doing a job for the debugger.
        return;

    QMutexLocker locker(&m_lock);
    clearTemporaryBreakPoints();
    pauseAndWait(Throwing);
}

Function *Debugger::getFunction() const
{
    ExecutionContext *context = m_engine->currentContext();
    if (CallContext *callCtx = context->asCallContext())
        return callCtx->function->function;
    else {
        Q_ASSERT(context->type == QV4::ExecutionContext::Type_GlobalContext);
        return context->engine->globalCode;
    }
}

void Debugger::pauseAndWait(PauseReason reason)
{
    if (m_runningJob)
        return;

    m_state = Paused;
    QMetaObject::invokeMethod(m_agent, "debuggerPaused", Qt::QueuedConnection,
                              Q_ARG(QV4::Debugging::Debugger*, this),
                              Q_ARG(QV4::Debugging::PauseReason, reason));

    while (true) {
        m_runningCondition.wait(&m_lock);
        if (m_runningJob) {
            m_runningJob->run();
            m_jobIsRunning.wakeAll();
        } else {
            break;
        }
    }

    m_state = Running;
}

void Debugger::setTemporaryBreakPointOnNextLine()
{
    ExecutionState state = currentExecutionState();
    Function *function = state.function;
    if (!function)
        return;

    QList<qptrdiff> pcs = function->programCountersForAllLines();
    if (pcs.isEmpty())
        return;

    m_temporaryBreakPoints = TemporaryBreakPoint(function, m_engine->currentContext());
    m_temporaryBreakPoints.codeOffsets.reserve(pcs.size());
    for (QList<qptrdiff>::const_iterator i = pcs.begin(), ei = pcs.end(); i != ei; ++i) {
        // note: we do set a breakpoint on the current line, because there could be a loop where
        // a step-over would be jump back to the first instruction making up the current line.
        qptrdiff offset = *i;

        if (hasBreakOnInstruction(function, offset))
            continue; // do not set a temporary breakpoint if there already is a breakpoint set by the user

        setBreakOnInstruction(function, offset, true);
        m_temporaryBreakPoints.codeOffsets.append(offset);
    }
}

void Debugger::clearTemporaryBreakPoints()
{
    if (m_temporaryBreakPoints.function) {
        foreach (quintptr offset, m_temporaryBreakPoints.codeOffsets)
            setBreakOnInstruction(m_temporaryBreakPoints.function, offset, false);
        m_temporaryBreakPoints = TemporaryBreakPoint();
    }
}

bool Debugger::temporaryBreakPointInFunction(ExecutionContext *context) const
{
    return m_temporaryBreakPoints.function == getFunction()
            && m_temporaryBreakPoints.context == context;
}

void Debugger::applyPendingBreakPoints()
{
    foreach (QV4::CompiledData::CompilationUnit *unit, m_engine->compilationUnits) {
        foreach (Function *function, unit->runtimeFunctions) {
            m_pendingBreakPointsToAdd.applyToFunction(function, /*removeBreakPoints*/false);
            m_pendingBreakPointsToRemove.applyToFunction(function, /*removeBreakPoints*/true);
        }
    }

    for (BreakPoints::ConstIterator it = m_pendingBreakPointsToAdd.constBegin(),
         end = m_pendingBreakPointsToAdd.constEnd(); it != end; ++it) {
        foreach (int lineNumber, it.value())
            m_pendingBreakPointsToAddToFutureCode.add(it.key(), lineNumber);
    }

    m_pendingBreakPointsToAdd.clear();
    m_pendingBreakPointsToRemove.clear();
    m_havePendingBreakPoints = false;
}

void Debugger::setBreakOnInstruction(Function *function, qptrdiff codeOffset, bool onoff)
{
    uchar *codePtr = const_cast<uchar *>(function->codeData) + codeOffset;
    QQmlJS::Moth::Instr *instruction = reinterpret_cast<QQmlJS::Moth::Instr*>(codePtr);
    instruction->common.breakPoint = onoff;
}

bool Debugger::hasBreakOnInstruction(Function *function, qptrdiff codeOffset)
{
    uchar *codePtr = const_cast<uchar *>(function->codeData) + codeOffset;
    QQmlJS::Moth::Instr *instruction = reinterpret_cast<QQmlJS::Moth::Instr*>(codePtr);
    return instruction->common.breakPoint;
}

bool Debugger::reallyHitTheBreakPoint(const QString &filename, int linenr)
{
    QString condition = m_breakPointConditions.condition(filename, linenr);
    if (condition.isEmpty())
        return true;

    Q_ASSERT(m_runningJob == 0);
    EvalJob evilJob(m_engine, condition);
    m_runningJob = &evilJob;
    m_runningJob->run();

    return evilJob.resultAsBoolean();
}

void Debugger::runInEngine(Debugger::Job *job)
{
    QMutexLocker locker(&m_lock);
    runInEngine_havingLock(job);
}

void Debugger::runInEngine_havingLock(Debugger::Job *job)
{
    Q_ASSERT(job);
    Q_ASSERT(m_runningJob == 0);

    m_runningJob = job;
    m_runningCondition.wakeAll();
    m_jobIsRunning.wait(&m_lock);
    m_runningJob = 0;
}

void DebuggerAgent::addDebugger(Debugger *debugger)
{
    Q_ASSERT(!m_debuggers.contains(debugger));
    m_debuggers << debugger;
    debugger->attachToAgent(this);

    debugger->setBreakOnThrow(m_breakOnThrow);

    foreach (const BreakPoint &breakPoint, m_breakPoints.values())
        if (breakPoint.enabled)
            debugger->addBreakPoint(breakPoint.fileName, breakPoint.lineNr, breakPoint.condition);
}

void DebuggerAgent::removeDebugger(Debugger *debugger)
{
    m_debuggers.removeAll(debugger);
    debugger->detachFromAgent();
}

void DebuggerAgent::pause(Debugger *debugger) const
{
    debugger->pause();
}

void DebuggerAgent::pauseAll() const
{
    foreach (Debugger *debugger, m_debuggers)
        pause(debugger);
}

void DebuggerAgent::resumeAll() const
{
    foreach (Debugger *debugger, m_debuggers)
        if (debugger->state() == Debugger::Paused)
            debugger->resume(Debugger::FullThrottle);
}

int DebuggerAgent::addBreakPoint(const QString &fileName, int lineNumber, bool enabled, const QString &condition)
{
    if (enabled)
        foreach (Debugger *debugger, m_debuggers)
            debugger->addBreakPoint(fileName, lineNumber, condition);

    int id = m_breakPoints.size();
    m_breakPoints.insert(id, BreakPoint(fileName, lineNumber, enabled, condition));
    return id;
}

void DebuggerAgent::removeBreakPoint(int id)
{
    BreakPoint breakPoint = m_breakPoints.value(id);
    if (!breakPoint.isValid())
        return;

    m_breakPoints.remove(id);

    if (breakPoint.enabled)
        foreach (Debugger *debugger, m_debuggers)
            debugger->removeBreakPoint(breakPoint.fileName, breakPoint.lineNr);
}

void DebuggerAgent::removeAllBreakPoints()
{
    QList<int> ids = m_breakPoints.keys();
    foreach (int id, ids)
        removeBreakPoint(id);
}

void DebuggerAgent::enableBreakPoint(int id, bool onoff)
{
    BreakPoint &breakPoint = m_breakPoints[id];
    if (!breakPoint.isValid() || breakPoint.enabled == onoff)
        return;
    breakPoint.enabled = onoff;

    foreach (Debugger *debugger, m_debuggers) {
        if (onoff)
            debugger->addBreakPoint(breakPoint.fileName, breakPoint.lineNr, breakPoint.condition);
        else
            debugger->removeBreakPoint(breakPoint.fileName, breakPoint.lineNr);
    }
}

QList<int> DebuggerAgent::breakPointIds(const QString &fileName, int lineNumber) const
{
    QList<int> ids;

    for (QHash<int, BreakPoint>::const_iterator i = m_breakPoints.begin(), ei = m_breakPoints.end(); i != ei; ++i)
        if (i->lineNr == lineNumber && fileName.endsWith(i->fileName))
            ids.push_back(i.key());

    return ids;
}

void DebuggerAgent::setBreakOnThrow(bool onoff)
{
    if (onoff != m_breakOnThrow) {
        m_breakOnThrow = onoff;
        foreach (Debugger *debugger, m_debuggers)
            debugger->setBreakOnThrow(onoff);
    }
}

DebuggerAgent::~DebuggerAgent()
{
    Q_ASSERT(m_debuggers.isEmpty());
}

void Debugger::BreakPoints::add(const QString &fileName, int lineNumber)
{
    QList<int> &lines = (*this)[fileName];
    if (!lines.contains(lineNumber)) {
        lines.append(lineNumber);
        std::sort(lines.begin(), lines.end());
    }
}

bool Debugger::BreakPoints::remove(const QString &fileName, int lineNumber)
{
    Iterator breakPoints = find(fileName);
    if (breakPoints == constEnd())
        return false;
    return breakPoints->removeAll(lineNumber) > 0;
}

bool Debugger::BreakPoints::contains(const QString &fileName, int lineNumber) const
{
    ConstIterator breakPoints = find(fileName);
    if (breakPoints == constEnd())
        return false;
    return breakPoints->contains(lineNumber);
}

void Debugger::BreakPoints::applyToFunction(Function *function, bool removeBreakPoints)
{
    Iterator breakPointsForFile = begin();

    while (breakPointsForFile != end()) {
        if (!function->sourceFile().endsWith(breakPointsForFile.key())) {
            ++breakPointsForFile;
            continue;
        }

        QList<int>::Iterator breakPoint = breakPointsForFile->begin();
        while (breakPoint != breakPointsForFile->end()) {
            bool breakPointFound = false;
            const quint32 *lineNumberMappings = function->compiledFunction->lineNumberMapping();
            for (quint32 i = 0; i < function->compiledFunction->nLineNumberMappingEntries; ++i) {
                const int codeOffset = lineNumberMappings[i * 2];
                const int lineNumber = lineNumberMappings[i * 2 + 1];
                if (lineNumber == *breakPoint) {
                    setBreakOnInstruction(function, codeOffset, !removeBreakPoints);
                    // Continue setting the next break point.
                    breakPointFound = true;
                    break;
                }
            }
            if (breakPointFound)
                breakPoint = breakPointsForFile->erase(breakPoint);
            else
                ++breakPoint;
        }

        if (breakPointsForFile->isEmpty())
            breakPointsForFile = erase(breakPointsForFile);
        else
            ++breakPointsForFile;
    }
}


Debugger::Collector::~Collector()
{
}

void Debugger::Collector::collect(const QString &name, const ScopedValue &value)
{
    switch (value->type()) {
    case Value::Empty_Type:
        Q_ASSERT(!"empty Value encountered");
        break;
    case Value::Undefined_Type:
        addUndefined(name);
        break;
    case Value::Null_Type:
        addNull(name);
        break;
    case Value::Boolean_Type:
        addBoolean(name, value->booleanValue());
        break;
    case Value::Managed_Type:
        if (String *s = value->asString())
            addString(name, s->toQString());
        else
            addObject(name, value);
        break;
    case Value::Integer_Type:
        addInteger(name, value->int_32);
        break;
    default: // double
        addDouble(name, value->doubleValue());
        break;
    }
}

void Debugger::Collector::collect(const ObjectRef object)
{
    bool property = true;
    qSwap(property, m_isProperty);

    Scope scope(m_engine);
    ObjectIterator it(scope, object, ObjectIterator::EnumerableOnly);
    ScopedValue name(scope);
    ScopedValue value(scope);
    while (true) {
        Value v;
        name = it.nextPropertyNameAsString(&v);
        if (name->isNull())
            break;
        QString key = name->toQStringNoThrow();
        value = v;
        collect(key, value);
    }

    qSwap(property, m_isProperty);
}


Debugger::Job::~Job()
{
}