qmlengine.cpp 33.1 KB
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/**************************************************************************
**
** This file is part of Qt Creator
**
** Copyright (c) 2009 Nokia Corporation and/or its subsidiary(-ies).
**
** Contact: Nokia Corporation (qt-info@nokia.com)
**
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** No Commercial Usage
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**
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** This file contains pre-release code and may not be distributed.
** You may use this file in accordance with the terms and conditions
** contained in the Technology Preview License Agreement accompanying
** this package.
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**
** GNU Lesser General Public License Usage
**
** Alternatively, this file may be used under the terms of the GNU Lesser
** 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
** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
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** In addition, as a special exception, Nokia gives you certain additional
** rights.  These rights are described in the Nokia Qt LGPL Exception
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
**
** If you have questions regarding the use of this file, please contact
** Nokia at qt-info@nokia.com.
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**
**************************************************************************/

#include "qmlengine.h"
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#include "qmladapter.h"
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#include "debuggerstartparameters.h"
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#include "debuggeractions.h"
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#include "debuggerconstants.h"
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#include "debuggercore.h"
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#include "debuggerdialogs.h"
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#include "debuggermainwindow.h"
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#include "debuggerrunner.h"
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#include "debuggerstringutils.h"
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#include "debuggertooltipmanager.h"
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#include "breakhandler.h"
#include "moduleshandler.h"
#include "registerhandler.h"
#include "stackhandler.h"
#include "watchhandler.h"
#include "watchutils.h"

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#include <extensionsystem/pluginmanager.h>
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#include <projectexplorer/applicationlauncher.h>
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#include <utils/environment.h>
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#include <utils/abstractprocess.h>
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#include <utils/qtcassert.h>
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#include <utils/fileinprojectfinder.h>
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#include <coreplugin/icore.h>
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#include <coreplugin/helpmanager.h>

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#include <QtCore/QDateTime>
#include <QtCore/QDebug>
#include <QtCore/QDir>
#include <QtCore/QFileInfo>
#include <QtCore/QTimer>

#include <QtGui/QAction>
#include <QtGui/QApplication>
#include <QtGui/QMainWindow>
#include <QtGui/QMessageBox>
#include <QtGui/QToolTip>
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#include <QtGui/QTextDocument>
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#include <QtNetwork/QTcpSocket>
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#include <QtNetwork/QHostAddress>

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#define DEBUG_QML 1
#if DEBUG_QML
#   define SDEBUG(s) qDebug() << s
#else
#   define SDEBUG(s)
#endif
# define XSDEBUG(s) qDebug() << s

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using namespace ProjectExplorer;

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namespace Debugger {
namespace Internal {

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struct JSAgentBreakpointData
{
    QByteArray functionName;
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    QByteArray fileUrl;
    qint32 lineNumber;
};

struct JSAgentStackData
{
    QByteArray functionName;
    QByteArray fileUrl;
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    qint32 lineNumber;
};

uint qHash(const JSAgentBreakpointData &b)
{
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    return b.lineNumber ^ qHash(b.fileUrl);
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}

QDataStream &operator<<(QDataStream &s, const JSAgentBreakpointData &data)
{
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    return s << data.functionName << data.fileUrl << data.lineNumber;
}

QDataStream &operator<<(QDataStream &s, const JSAgentStackData &data)
{
    return s << data.functionName << data.fileUrl << data.lineNumber;
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}

QDataStream &operator>>(QDataStream &s, JSAgentBreakpointData &data)
{
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    return s >> data.functionName >> data.fileUrl >> data.lineNumber;
}

QDataStream &operator>>(QDataStream &s, JSAgentStackData &data)
{
    return s >> data.functionName >> data.fileUrl >> data.lineNumber;
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}

bool operator==(const JSAgentBreakpointData &b1, const JSAgentBreakpointData &b2)
{
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    return b1.lineNumber == b2.lineNumber && b1.fileUrl == b2.fileUrl;
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}

typedef QSet<JSAgentBreakpointData> JSAgentBreakpoints;
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typedef QList<JSAgentStackData> JSAgentStackFrames;
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static QDataStream &operator>>(QDataStream &s, WatchData &data)
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{
    data = WatchData();
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    QByteArray name;
    QByteArray value;
    QByteArray type;
    bool hasChildren = false;
    s >> data.exp >> name >> value >> type >> hasChildren >> data.id;
    data.name = QString::fromUtf8(name);
    data.setType(type, false);
    data.setValue(QString::fromUtf8(value));
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    data.setHasChildren(hasChildren);
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    data.setAllUnneeded();
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    return s;
}

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class QmlEnginePrivate
{
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public:
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    explicit QmlEnginePrivate(QmlEngine *q);

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private:
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    friend class QmlEngine;
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    int m_ping;
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    QmlAdapter m_adapter;
    ApplicationLauncher m_applicationLauncher;
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    Utils::FileInProjectFinder fileFinder;
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};

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QmlEnginePrivate::QmlEnginePrivate(QmlEngine *q)
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    : m_ping(0), m_adapter(q)
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{}

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///////////////////////////////////////////////////////////////////////
//
// QmlEngine
//
///////////////////////////////////////////////////////////////////////

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QmlEngine::QmlEngine(const DebuggerStartParameters &startParameters,
        DebuggerEngine *masterEngine)
  : DebuggerEngine(startParameters, masterEngine),
    d(new QmlEnginePrivate(this))
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{
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    setObjectName(QLatin1String("QmlEngine"));
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}

QmlEngine::~QmlEngine()
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{}
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void QmlEngine::setupInferior()
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{
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    QTC_ASSERT(state() == InferiorSetupRequested, qDebug() << state());
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    if (startParameters().startMode == AttachToRemote) {
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        emit requestRemoteSetup();
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    } else {
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        connect(&d->m_applicationLauncher,
            SIGNAL(processExited(int)),
            SLOT(disconnected()));
        connect(&d->m_applicationLauncher,
            SIGNAL(appendMessage(QString,ProjectExplorer::OutputFormat)),
            SLOT(appendMessage(QString,ProjectExplorer::OutputFormat)));
        connect(&d->m_applicationLauncher,
            SIGNAL(bringToForegroundRequested(qint64)),
            runControl(),
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            SLOT(bringApplicationToForeground(qint64)));
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        d->m_applicationLauncher.setEnvironment(startParameters().environment);
        d->m_applicationLauncher.setWorkingDirectory(startParameters().workingDirectory);

        notifyInferiorSetupOk();
    }
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}
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void QmlEngine::appendMessage(const QString &msg, OutputFormat /* format */)
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{
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    showMessage(msg, AppOutput); // FIXME: Redirect to RunControl
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}

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void QmlEngine::connectionEstablished()
{
    attemptBreakpointSynchronization();

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    ExtensionSystem::PluginManager *pluginManager =
        ExtensionSystem::PluginManager::instance();
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    pluginManager->addObject(&d->m_adapter);
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    pluginManager->addObject(this);
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    showMessage(tr("QML Debugger connected."), StatusBar);
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    synchronizeWatchers();

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    notifyEngineRunAndInferiorRunOk();
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}

void QmlEngine::connectionStartupFailed()
{
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    Core::ICore * const core = Core::ICore::instance();
    QMessageBox *infoBox = new QMessageBox(core->mainWindow());
    infoBox->setIcon(QMessageBox::Critical);
    infoBox->setWindowTitle(tr("Qt Creator"));
    infoBox->setText(tr("Could not connect to the in-process QML debugger.\n"
                        "Do you want to retry?"));
    infoBox->setStandardButtons(QMessageBox::Retry | QMessageBox::Cancel | QMessageBox::Help);
    infoBox->setDefaultButton(QMessageBox::Retry);
    infoBox->setModal(true);

    connect(infoBox, SIGNAL(finished(int)),
            this, SLOT(retryMessageBoxFinished(int)));

    infoBox->show();
}

void QmlEngine::retryMessageBoxFinished(int result)
{
    switch (result) {
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    case QMessageBox::Retry: {
        d->m_adapter.beginConnection();
        break;
    }
    case QMessageBox::Help: {
        Core::HelpManager *helpManager = Core::HelpManager::instance();
        helpManager->handleHelpRequest("qthelp://com.nokia.qtcreator/doc/creator-debugging-qml.html");
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        // fall through
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    }
    default:
        notifyEngineRunFailed();
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        break;
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    }
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}

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void QmlEngine::connectionError(QAbstractSocket::SocketError socketError)
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{
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    if (socketError == QAbstractSocket::RemoteHostClosedError)
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        showMessage(tr("QML Debugger: Remote host closed connection."), StatusBar);
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}

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void QmlEngine::serviceConnectionError(const QString &serviceName)
{
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    showMessage(tr("QML Debugger: Could not connect to service '%1'.")
        .arg(serviceName), StatusBar);
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}

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bool QmlEngine::canDisplayTooltip() const
{
    return state() == InferiorRunOk || state() == InferiorStopOk;
}

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void QmlEngine::filterApplicationMessage(const QString &msg, int /*channel*/)
{
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    static const QString qddserver = QLatin1String("QDeclarativeDebugServer: ");
    static const QString cannotRetrieveDebuggingOutput = Utils::AbstractProcess::msgWinCannotRetrieveDebuggingOutput();
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    const int index = msg.indexOf(qddserver);
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    if (index != -1) {
        QString status = msg;
        status.remove(0, index + qddserver.length()); // chop of 'QDeclarativeDebugServer: '

        static QString waitingForConnection = QLatin1String("Waiting for connection on port");
        static QString unableToListen = QLatin1String("Unable to listen on port");
        static QString debuggingNotEnabled = QLatin1String("Ignoring \"-qmljsdebugger=port:");
        static QString connectionEstablished = QLatin1String("Connection established");

        QString errorMessage;
        if (status.startsWith(waitingForConnection)) {
            d->m_adapter.beginConnection();
        } else if (status.startsWith(unableToListen)) {
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            //: Error message shown after 'Could not connect ... debugger:"
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            errorMessage = tr("The port seems to be in use.");
        } else if (status.startsWith(debuggingNotEnabled)) {
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            //: Error message shown after 'Could not connect ... debugger:"
            errorMessage = tr("The application is not set up for QML/JS debugging.");
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        } else if (status.startsWith(connectionEstablished)) {
            // nothing to do
        } else {
            qWarning() << "Unknown QDeclarativeDebugServer status message: " << status;
        }

        if (!errorMessage.isEmpty()) {
            notifyEngineRunFailed();

            Core::ICore * const core = Core::ICore::instance();
            QMessageBox *infoBox = new QMessageBox(core->mainWindow());
            infoBox->setIcon(QMessageBox::Critical);
            infoBox->setWindowTitle(tr("Qt Creator"));
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            //: %1 is detailed error message
            infoBox->setText(tr("Could not connect to the in-process QML debugger:\n%1")
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                             .arg(errorMessage));
            infoBox->setStandardButtons(QMessageBox::Ok | QMessageBox::Help);
            infoBox->setDefaultButton(QMessageBox::Ok);
            infoBox->setModal(true);

            connect(infoBox, SIGNAL(finished(int)),
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                    this, SLOT(wrongSetupMessageBoxFinished(int)));
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            infoBox->show();
        }
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    } else if (msg.contains(cannotRetrieveDebuggingOutput)) {
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        // we won't get debugging output, so just try to connect ...
        d->m_adapter.beginConnection();
    }
}

void QmlEngine::showMessage(const QString &msg, int channel, int timeout) const
{
    if (channel == AppOutput || channel == AppError) {
        const_cast<QmlEngine*>(this)->filterApplicationMessage(msg, channel);
    }
    DebuggerEngine::showMessage(msg, channel, timeout);
}

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bool QmlEngine::acceptsWatchesWhileRunning() const
{
    return true;
}

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void QmlEngine::closeConnection()
{
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    disconnect(&d->m_adapter, SIGNAL(connectionStartupFailed()),
        this, SLOT(connectionStartupFailed()));
    d->m_adapter.closeConnection();

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    ExtensionSystem::PluginManager *pluginManager =
        ExtensionSystem::PluginManager::instance();
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    if (pluginManager->allObjects().contains(this)) {
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        pluginManager->removeObject(&d->m_adapter);
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        pluginManager->removeObject(this);
    }
}

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void QmlEngine::runEngine()
{
    QTC_ASSERT(state() == EngineRunRequested, qDebug() << state());
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    if (!isSlaveEngine())
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        startApplicationLauncher();
}

void QmlEngine::startApplicationLauncher()
{
    if (!d->m_applicationLauncher.isRunning()) {
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        appendMessage(tr("Starting %1 %2").arg(
                          QDir::toNativeSeparators(startParameters().executable),
                          startParameters().processArgs)
                      + QLatin1Char('\n')
                     , NormalMessageFormat);
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        d->m_applicationLauncher.start(ApplicationLauncher::Gui,
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                                    startParameters().executable,
                                    startParameters().processArgs);
    }
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}
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void QmlEngine::stopApplicationLauncher()
{
    if (d->m_applicationLauncher.isRunning()) {
        disconnect(&d->m_applicationLauncher, SIGNAL(processExited(int)), this, SLOT(disconnected()));
        d->m_applicationLauncher.stop();
    }
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}

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void QmlEngine::handleRemoteSetupDone(int gdbServerPort, int qmlPort)
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{
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    Q_UNUSED(gdbServerPort);
    if (qmlPort != -1)
        startParameters().qmlServerPort = qmlPort;
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    notifyInferiorSetupOk();
}

void QmlEngine::handleRemoteSetupFailed(const QString &message)
{
    QMessageBox::critical(0,tr("Failed to start application"),
        tr("Application startup failed: %1").arg(message));
    notifyInferiorSetupFailed();
}

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void QmlEngine::shutdownInferior()
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{
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    if (isSlaveEngine()) {
        resetLocation();
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    }
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    stopApplicationLauncher();
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    notifyInferiorShutdownOk();
}

void QmlEngine::shutdownEngine()
{
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    closeConnection();
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    // double check (ill engine?):
    stopApplicationLauncher();
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    notifyEngineShutdownOk();
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    if (!isSlaveEngine())
        showMessage(QString(), StatusBar);
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}

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void QmlEngine::setupEngine()
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{
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    d->m_ping = 0;
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    connect(&d->m_adapter, SIGNAL(connectionError(QAbstractSocket::SocketError)),
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        SLOT(connectionError(QAbstractSocket::SocketError)));
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    connect(&d->m_adapter, SIGNAL(serviceConnectionError(QString)),
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        SLOT(serviceConnectionError(QString)));
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    connect(&d->m_adapter, SIGNAL(connected()),
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        SLOT(connectionEstablished()));
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    connect(&d->m_adapter, SIGNAL(connectionStartupFailed()),
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        SLOT(connectionStartupFailed()));
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    notifyEngineSetupOk();
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}

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void QmlEngine::continueInferior()
{
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    QTC_ASSERT(state() == InferiorStopOk, qDebug() << state());
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    QByteArray reply;
    QDataStream rs(&reply, QIODevice::WriteOnly);
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    QByteArray cmd = "CONTINUE";
    rs << cmd;
    logMessage(LogSend, cmd);
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    sendMessage(reply);
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    resetLocation();
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    notifyInferiorRunRequested();
    notifyInferiorRunOk();
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}

void QmlEngine::interruptInferior()
{
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    QByteArray reply;
    QDataStream rs(&reply, QIODevice::WriteOnly);
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    QByteArray cmd = "INTERRUPT";
    rs << cmd;
    logMessage(LogSend, cmd);
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    sendMessage(reply);
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    notifyInferiorStopOk();
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}

void QmlEngine::executeStep()
{
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    QByteArray reply;
    QDataStream rs(&reply, QIODevice::WriteOnly);
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    QByteArray cmd = "STEPINTO";
    rs << cmd;
    logMessage(LogSend, cmd);
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    sendMessage(reply);
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    notifyInferiorRunRequested();
    notifyInferiorRunOk();
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}

void QmlEngine::executeStepI()
{
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    QByteArray reply;
    QDataStream rs(&reply, QIODevice::WriteOnly);
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    QByteArray cmd = "STEPINTO";
    rs << cmd;
    logMessage(LogSend, cmd);
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    sendMessage(reply);
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    notifyInferiorRunRequested();
    notifyInferiorRunOk();
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}

void QmlEngine::executeStepOut()
{
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    QByteArray reply;
    QDataStream rs(&reply, QIODevice::WriteOnly);
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    QByteArray cmd = "STEPOUT";
    rs << cmd;
    logMessage(LogSend, cmd);
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    sendMessage(reply);
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    notifyInferiorRunRequested();
    notifyInferiorRunOk();
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}

void QmlEngine::executeNext()
{
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    QByteArray reply;
    QDataStream rs(&reply, QIODevice::WriteOnly);
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    QByteArray cmd = "STEPOVER";
    rs << cmd;
    logMessage(LogSend, cmd);
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    sendMessage(reply);
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    notifyInferiorRunRequested();
    notifyInferiorRunOk();
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}

void QmlEngine::executeNextI()
{
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    SDEBUG("QmlEngine::executeNextI()");
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}

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void QmlEngine::executeRunToLine(const ContextData &data)
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{
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    Q_UNUSED(data)
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    SDEBUG("FIXME:  QmlEngine::executeRunToLine()");
}

void QmlEngine::executeRunToFunction(const QString &functionName)
{
    Q_UNUSED(functionName)
    XSDEBUG("FIXME:  QmlEngine::executeRunToFunction()");
}

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void QmlEngine::executeJumpToLine(const ContextData &data)
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{
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    Q_UNUSED(data)
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    XSDEBUG("FIXME:  QmlEngine::executeJumpToLine()");
}

void QmlEngine::activateFrame(int index)
{
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    QByteArray reply;
    QDataStream rs(&reply, QIODevice::WriteOnly);
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    QByteArray cmd = "ACTIVATE_FRAME";
    rs << cmd
       << index;
    logMessage(LogSend, QString("%1 %2").arg(QString(cmd), QString::number(index)));
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    sendMessage(reply);
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    gotoLocation(stackHandler()->frames().value(index));
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}

void QmlEngine::selectThread(int index)
{
    Q_UNUSED(index)
}

void QmlEngine::attemptBreakpointSynchronization()
{
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    BreakHandler *handler = breakHandler();
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    foreach (BreakpointId id, handler->unclaimedBreakpointIds()) {
        // Take ownership of the breakpoint. Requests insertion.
        if (acceptsBreakpoint(id))
            handler->setEngine(id, this);
    }

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    JSAgentBreakpoints breakpoints;
    foreach (BreakpointId id, handler->engineBreakpointIds(this)) {
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        if (handler->state(id) == BreakpointRemoveRequested) {
            handler->notifyBreakpointRemoveProceeding(id);
            handler->notifyBreakpointRemoveOk(id);
        } else {
            if (handler->state(id) == BreakpointInsertRequested) {
                handler->notifyBreakpointInsertProceeding(id);
            }
            JSAgentBreakpointData bp;
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            bp.fileUrl = QUrl::fromLocalFile(handler->fileName(id)).toString().toUtf8();
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            bp.lineNumber = handler->lineNumber(id);
            bp.functionName = handler->functionName(id).toUtf8();
            breakpoints.insert(bp);
            if (handler->state(id) == BreakpointInsertProceeding) {
                handler->notifyBreakpointInsertOk(id);
            }
        }
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    }

    QByteArray reply;
    QDataStream rs(&reply, QIODevice::WriteOnly);
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    QByteArray cmd = "BREAKPOINTS";
    rs << cmd
       << breakpoints;

    QStringList breakPointsStr;
    foreach (const JSAgentBreakpointData &bp, breakpoints) {
        breakPointsStr << QString("('%1' '%2' %3)").arg(QString(bp.functionName),
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                                  QString(bp.fileUrl), QString::number(bp.lineNumber));
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    }
    logMessage(LogSend, QString("%1 [%2]").arg(QString(cmd), breakPointsStr.join(", ")));

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    sendMessage(reply);
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}

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bool QmlEngine::acceptsBreakpoint(BreakpointId id) const
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{
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    return !DebuggerEngine::isCppBreakpoint(breakHandler()->breakpointData(id));
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}

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void QmlEngine::loadSymbols(const QString &moduleName)
{
    Q_UNUSED(moduleName)
}

void QmlEngine::loadAllSymbols()
{
}

void QmlEngine::reloadModules()
{
}

void QmlEngine::requestModuleSymbols(const QString &moduleName)
{
    Q_UNUSED(moduleName)
}

//////////////////////////////////////////////////////////////////////
//
// Tooltip specific stuff
//
//////////////////////////////////////////////////////////////////////

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bool QmlEngine::setToolTipExpression(const QPoint &mousePos,
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    TextEditor::ITextEditor *editor, const DebuggerToolTipContext &ctx)
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{
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    // This is processed by QML inspector, which has dependencies to 
    // the qml js editor. Makes life easier.
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    emit tooltipRequested(mousePos, editor, ctx.position);
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    return true;
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}

//////////////////////////////////////////////////////////////////////
//
// Watch specific stuff
//
//////////////////////////////////////////////////////////////////////

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void QmlEngine::assignValueInDebugger(const WatchData *,
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    const QString &expression, const QVariant &valueV)
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{
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    QRegExp inObject("@([0-9a-fA-F]+)->(.+)");
    if (inObject.exactMatch(expression)) {
        bool ok = false;
        quint64 objectId = inObject.cap(1).toULongLong(&ok, 16);
        QString property = inObject.cap(2);
        if (ok && objectId > 0 && !property.isEmpty()) {
            QByteArray reply;
            QDataStream rs(&reply, QIODevice::WriteOnly);
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            QByteArray cmd = "SET_PROPERTY";
            rs << cmd;
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            rs << expression.toUtf8() << objectId << property << valueV.toString();
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            logMessage(LogSend, QString("%1 %2 %3 %4 %5").arg(
                                 QString(cmd), QString::number(objectId), QString(property),
                                 valueV.toString()));
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            sendMessage(reply);
        }
    }
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}

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void QmlEngine::updateWatchData(const WatchData &data,
    const WatchUpdateFlags &)
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{
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//    qDebug() << "UPDATE WATCH DATA" << data.toString();
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    //watchHandler()->rebuildModel();
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    showStatusMessage(tr("Stopped."), 5000);
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    if (!data.name.isEmpty() && data.isValueNeeded()) {
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        QByteArray reply;
        QDataStream rs(&reply, QIODevice::WriteOnly);
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        QByteArray cmd = "EXEC";
        rs << cmd;
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        rs << data.iname << data.name;
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        logMessage(LogSend, QString("%1 %2 %3").arg(QString(cmd), QString(data.iname),
                                                          QString(data.name)));
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        sendMessage(reply);
    }

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    if (!data.name.isEmpty() && data.isChildrenNeeded()
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            && watchHandler()->isExpandedIName(data.iname)) {
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        expandObject(data.iname, data.id);
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    }

    synchronizeWatchers();
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    if (!data.isSomethingNeeded())
        watchHandler()->insertData(data);
}

void QmlEngine::synchronizeWatchers()
{
    if (!watchHandler()->watcherNames().isEmpty()) {
        // send watchers list
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        QByteArray reply;
        QDataStream rs(&reply, QIODevice::WriteOnly);
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        QByteArray cmd = "WATCH_EXPRESSIONS";
        rs << cmd;
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        rs << watchHandler()->watchedExpressions();
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        logMessage(LogSend, QString("%1 %2").arg(
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                       QString(cmd), watchHandler()->watchedExpressions().join(", ")));
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        sendMessage(reply);
    }
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}

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void QmlEngine::expandObject(const QByteArray &iname, quint64 objectId)
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{
    QByteArray reply;
    QDataStream rs(&reply, QIODevice::WriteOnly);
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    QByteArray cmd = "EXPAND";
    rs << cmd;
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    rs << iname << objectId;
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    logMessage(LogSend, QString("%1 %2 %3").arg(QString(cmd), QString(iname),
                                                      QString::number(objectId)));
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    sendMessage(reply);
}

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void QmlEngine::sendPing()
{
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    d->m_ping++;
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    QByteArray reply;
    QDataStream rs(&reply, QIODevice::WriteOnly);
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    QByteArray cmd = "PING";
    rs << cmd;
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    rs << d->m_ping;
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    logMessage(LogSend, QString("%1 %2").arg(QString(cmd), QString::number(d->m_ping)));
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    sendMessage(reply);
}

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unsigned QmlEngine::debuggerCapabilities() const
{
    return AddWatcherCapability;
    /*ReverseSteppingCapability | SnapshotCapability
        | AutoDerefPointersCapability | DisassemblerCapability
        | RegisterCapability | ShowMemoryCapability
        | JumpToLineCapability | ReloadModuleCapability
        | ReloadModuleSymbolsCapability | BreakOnThrowAndCatchCapability
        | ReturnFromFunctionCapability
        | CreateFullBacktraceCapability
        | WatchpointCapability
        | AddWatcherCapability;*/
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}

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QString QmlEngine::toFileInProject(const QString &fileUrl)
{
    if (fileUrl.isEmpty())
        return fileUrl;

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    const QString path = QUrl(fileUrl).toLocalFile();
    if (path.isEmpty())
        return fileUrl;
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    // Try to find shadow-build file in source dir first
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    if (isShadowBuildProject()) {
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        const QString sourcePath = fromShadowBuildFilename(path);
        if (QFileInfo(sourcePath).exists())
            return sourcePath;
    }

    // Try whether file is absolute & exists
    if (QFileInfo(path).isAbsolute()
            && QFileInfo(path).exists()) {
        return path;
    }

    if (d->fileFinder.projectDirectory().isEmpty())
        d->fileFinder.setProjectDirectory(startParameters().projectDir);

    // Try to find file with biggest common path in source directory
    bool fileFound = false;
    QString fileInProject = d->fileFinder.findFile(path, &fileFound);
    if (fileFound)
        return fileInProject;
    return fileUrl;
}

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void QmlEngine::messageReceived(const QByteArray &message)
{
    QByteArray rwData = message;
    QDataStream stream(&rwData, QIODevice::ReadOnly);

    QByteArray command;
    stream >> command;

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    if (command == "STOPPED") {
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        //qDebug() << command << this << state();
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        if (state() == InferiorRunOk)
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            notifyInferiorSpontaneousStop();
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        QString logString = QString::fromLatin1(command);
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        JSAgentStackFrames stackFrames;
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        QList<WatchData> watches;
        QList<WatchData> locals;
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        stream >> stackFrames >> watches >> locals;
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        logString += QString::fromLatin1(" (%1 stack frames) (%2 watches)  (%3 locals)").
                     arg(stackFrames.size()).arg(watches.size()).arg(locals.size());
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        StackFrames ideStackFrames;
        for (int i = 0; i != stackFrames.size(); ++i) {
            StackFrame frame;
            frame.line = stackFrames.at(i).lineNumber;
            frame.function = stackFrames.at(i).functionName;
            frame.file = toFileInProject(stackFrames.at(i).fileUrl);
            frame.usable = QFileInfo(frame.file).isReadable();
            frame.level = i + 1;
            ideStackFrames << frame;
        }
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        if (ideStackFrames.size() && ideStackFrames.back().function == "<global>")
            ideStackFrames.takeLast();
        stackHandler()->setFrames(ideStackFrames);
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        watchHandler()->beginCycle();
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        bool needPing = false;
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        foreach (WatchData data, watches) {
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            data.iname = watchHandler()->watcherName(data.exp);
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            watchHandler()->insertData(data);
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            if (watchHandler()->expandedINames().contains(data.iname)) {
                needPing = true;
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                expandObject(data.iname, data.id);
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            }
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        }

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        foreach (WatchData data, locals) {
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            data.iname = "local." + data.exp;
            watchHandler()->insertData(data);
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            if (watchHandler()->expandedINames().contains(data.iname)) {
                needPing = true;
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                expandObject(data.iname, data.id);
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            }
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        }

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        if (needPing) {
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            sendPing();
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        } else {
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            watchHandler()->endCycle();
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        }
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        bool becauseOfException;
        stream >> becauseOfException;
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        logString += becauseOfException ? " exception" : " no_exception";

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        if (becauseOfException) {
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            QString error;
            stream >> error;

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            logString += QLatin1Char(' ');
            logString += error;
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            logMessage(LogReceive, logString);

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            QString msg = stackFrames.isEmpty()
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                ? tr("<p>An uncaught exception occurred:</p><p>%1</p>")
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                    .arg(Qt::escape(error))
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                : tr("<p>An uncaught exception occurred in <i>%1</i>:</p><p>%2</p>")
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                    .arg(stackFrames.value(0).fileUrl, Qt::escape(error));
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            showMessageBox(QMessageBox::Information, tr("Uncaught Exception"), msg);
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        } else {
            //
            // Make breakpoint non-pending
            //
            QString file;
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            QString function;
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            int line = -1;

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            if (!ideStackFrames.isEmpty()) {
                file = ideStackFrames.at(0).file;
                line = ideStackFrames.at(0).line;
                function = ideStackFrames.at(0).function;
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            }