qmlengine.cpp 27.9 KB
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/**************************************************************************
**
** This file is part of Qt Creator
**
** Copyright (c) 2009 Nokia Corporation and/or its subsidiary(-ies).
**
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** Contact: Nokia Corporation (qt-info@nokia.com)
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**
**
** GNU Lesser General Public License Usage
**
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** 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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**
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** In addition, as a special exception, Nokia gives you certain additional
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** rights. These rights are described in the Nokia Qt LGPL Exception
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** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
**
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** Other Usage
**
** Alternatively, this file may be used in accordance with the terms and
** conditions contained in a signed written agreement between you and Nokia.
**
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** If you have questions regarding the use of this file, please contact
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** 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 "debuggerinternalconstants.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"
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#include "sourcefileshandler.h"
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#include "watchutils.h"

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#include <extensionsystem/pluginmanager.h>
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#include <projectexplorer/applicationlauncher.h>
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#include <qmljsdebugclient/qdeclarativeoutputparser.h>
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#include <qmljseditor/qmljseditorconstants.h>
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#include <utils/environment.h>
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#include <utils/qtcassert.h>
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#include <utils/fileinprojectfinder.h>
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#include <coreplugin/coreconstants.h>
#include <coreplugin/editormanager/editormanager.h>
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#include <coreplugin/helpmanager.h>
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#include <coreplugin/icore.h>

#include <texteditor/itexteditor.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>
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#include <QtGui/QPlainTextEdit>
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#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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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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    QmlAdapter m_adapter;
    ApplicationLauncher m_applicationLauncher;
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    Utils::FileInProjectFinder fileFinder;
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    QTimer m_noDebugOutputTimer;
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    QmlJsDebugClient::QDeclarativeOutputParser m_outputParser;
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    QHash<QString, QTextDocument*> m_sourceDocuments;
    QHash<QString, QWeakPointer<TextEditor::ITextEditor> > m_sourceEditors;
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};

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QmlEnginePrivate::QmlEnginePrivate(QmlEngine *q)
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    : m_adapter(q)
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{}

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

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QmlEngine::QmlEngine(const DebuggerStartParameters &startParameters,
        DebuggerEngine *masterEngine)
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  : DebuggerEngine(startParameters, QmlLanguage, masterEngine),
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    d(new QmlEnginePrivate(this))
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{
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    setObjectName(QLatin1String("QmlEngine"));
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    ExtensionSystem::PluginManager *pluginManager =
        ExtensionSystem::PluginManager::instance();
    pluginManager->addObject(this);

    connect(&d->m_adapter, SIGNAL(connectionError(QAbstractSocket::SocketError)),
        SLOT(connectionError(QAbstractSocket::SocketError)));
    connect(&d->m_adapter, SIGNAL(serviceConnectionError(QString)),
        SLOT(serviceConnectionError(QString)));
    connect(&d->m_adapter, SIGNAL(connected()),
        SLOT(connectionEstablished()));
    connect(&d->m_adapter, SIGNAL(connectionStartupFailed()),
        SLOT(connectionStartupFailed()));

    connect(&d->m_applicationLauncher,
        SIGNAL(processExited(int)),
        SLOT(disconnected()));
    connect(&d->m_applicationLauncher,
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        SIGNAL(appendMessage(QString, Utils::OutputFormat)),
        SLOT(appendMessage(QString, Utils::OutputFormat)));
    connect(&d->m_applicationLauncher,
            SIGNAL(processStarted()),
            &d->m_noDebugOutputTimer,
            SLOT(start()));
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    d->m_outputParser.setNoOutputText(ApplicationLauncher::msgWinCannotRetrieveDebuggingOutput());
    connect(&d->m_outputParser, SIGNAL(waitingForConnectionMessage()),
            this, SLOT(beginConnection()));
    connect(&d->m_outputParser, SIGNAL(noOutputMessage()),
            this, SLOT(beginConnection()));
    connect(&d->m_outputParser, SIGNAL(errorMessage(QString)),
            this, SLOT(wrongSetupMessageBox(QString)));

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    // Only wait 8 seconds for the 'Waiting for connection' on application ouput, then just try to connect
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    // (application output might be redirected / blocked)
    d->m_noDebugOutputTimer.setSingleShot(true);
    d->m_noDebugOutputTimer.setInterval(8000);
    connect(&d->m_noDebugOutputTimer, SIGNAL(timeout()), this, SLOT(beginConnection()));
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}

QmlEngine::~QmlEngine()
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{
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    ExtensionSystem::PluginManager *pluginManager =
        ExtensionSystem::PluginManager::instance();

    if (pluginManager->allObjects().contains(this)) {
        pluginManager->removeObject(this);
    }
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    QList<Core::IEditor *> editorsToClose;

    QHash<QString, QWeakPointer<TextEditor::ITextEditor> >::iterator iter;
    for (iter = d->m_sourceEditors.begin(); iter != d->m_sourceEditors.end(); ++iter) {
        QWeakPointer<TextEditor::ITextEditor> textEditPtr = iter.value();
        if (textEditPtr)
            editorsToClose << textEditPtr.data();
    }
    Core::EditorManager::instance()->closeEditors(editorsToClose);

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    delete d;
}
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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 == AttachToRemoteServer) {
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        emit requestRemoteSetup();
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        if (startParameters().qmlServerPort != quint16(-1))
            notifyInferiorSetupOk();
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    } if (startParameters().startMode == AttachToQmlPort) {
            notifyInferiorSetupOk();

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    } else {
        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, Utils::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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    if (!watchHandler()->watcherNames().isEmpty()) {
        synchronizeWatchers();
    }
    connect(watchersModel(),SIGNAL(layoutChanged()),this,SLOT(synchronizeWatchers()));
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    if (state() == EngineRunRequested)
        notifyEngineRunAndInferiorRunOk();
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}
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void QmlEngine::beginConnection()
{
    d->m_noDebugOutputTimer.stop();
    d->m_adapter.beginConnection();
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}

void QmlEngine::connectionStartupFailed()
{
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    if (isSlaveEngine()) {
        if (masterEngine()->state() != InferiorRunOk) {
            // we're right now debugging C++, just try longer ...
            beginConnection();
            return;
        }
    }

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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: {
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        beginConnection();
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        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:
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        if (state() == InferiorRunOk) {
            notifyInferiorSpontaneousStop();
            notifyInferiorIll();
        } else {
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        notifyEngineRunFailed();
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        }
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        break;
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    }
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}

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void QmlEngine::wrongSetupMessageBox(const QString &errorMessage)
{
    d->m_noDebugOutputTimer.stop();
    notifyEngineRunFailed();

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

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

    infoBox->show();
}

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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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    if (!isSlaveEngine()) { // normal flow for slave engine when gdb exits
        notifyInferiorSpontaneousStop();
        notifyInferiorIll();
    }
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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 &output, int /*channel*/)
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{
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    d->m_outputParser.processOutput(output);
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}

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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void QmlEngine::gotoLocation(const Location &location)
{
    const QString fileName = location.fileName();
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    // TODO: QUrl::isLocalFile() once we depend on Qt 4.8
    if (QUrl(fileName).scheme().compare(QLatin1String("file"), Qt::CaseInsensitive) == 0) {
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        // internal file from source files -> show generated .js
        QString fileName = location.fileName();
        QTC_ASSERT(d->m_sourceDocuments.contains(fileName), return);
        const QString jsSource = d->m_sourceDocuments.value(fileName)->toPlainText();

        Core::IEditor *editor = 0;

        Core::EditorManager *editorManager = Core::EditorManager::instance();
        QList<Core::IEditor *> editors = editorManager->editorsForFileName(location.fileName());
        if (editors.isEmpty()) {
            QString titlePattern = tr("JS Source for %1").arg(fileName);
            editor = editorManager->openEditorWithContents(QmlJSEditor::Constants::C_QMLJSEDITOR_ID,
                                                           &titlePattern);
            if (editor) {
                editor->setProperty(Constants::OPENED_BY_DEBUGGER, true);
            }
        } else {
            editor = editors.back();
        }

        TextEditor::ITextEditor *textEditor = qobject_cast<TextEditor::ITextEditor*>(editor);
        if (!textEditor)
            return;

        QPlainTextEdit *plainTextEdit =
                qobject_cast<QPlainTextEdit *>(editor->widget());
        if (!plainTextEdit)
            return;
        plainTextEdit->setPlainText(jsSource);
        plainTextEdit->setReadOnly(true);
        editorManager->activateEditor(editor);
    } else {
        DebuggerEngine::gotoLocation(location);
    }
}

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void QmlEngine::closeConnection()
{
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    disconnect(watchersModel(),SIGNAL(layoutChanged()),this,SLOT(synchronizeWatchers()));
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    d->m_adapter.closeConnection();
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}

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void QmlEngine::runEngine()
{
    QTC_ASSERT(state() == EngineRunRequested, qDebug() << state());
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    if (!isSlaveEngine() && startParameters().startMode != AttachToRemoteServer
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            && startParameters().startMode != AttachToQmlPort)
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        startApplicationLauncher();
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    if (startParameters().startMode == AttachToQmlPort)
        beginConnection();
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}

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')
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                     , Utils::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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    d->m_noDebugOutputTimer.stop();

    if (d->m_adapter.activeDebuggerClient())
        d->m_adapter.activeDebuggerClient()->endSession();
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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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    connect(&d->m_applicationLauncher, SIGNAL(bringToForegroundRequested(qint64)),
            runControl(), SLOT(bringApplicationToForeground(qint64)),
            Qt::UniqueConnection);
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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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    if (d->m_adapter.activeDebuggerClient()) {
        d->m_adapter.activeDebuggerClient()->continueInferior();
    }
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    resetLocation();
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    notifyInferiorRunRequested();
    notifyInferiorRunOk();
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}

void QmlEngine::interruptInferior()
{
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    if (d->m_adapter.activeDebuggerClient()) {
        d->m_adapter.activeDebuggerClient()->interruptInferior();
    }
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    notifyInferiorStopOk();
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}

void QmlEngine::executeStep()
{
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    if (d->m_adapter.activeDebuggerClient()) {
        d->m_adapter.activeDebuggerClient()->executeStep();
    }
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    notifyInferiorRunRequested();
    notifyInferiorRunOk();
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}

void QmlEngine::executeStepI()
{
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    if (d->m_adapter.activeDebuggerClient()) {
        d->m_adapter.activeDebuggerClient()->executeStepI();
    }
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    notifyInferiorRunRequested();
    notifyInferiorRunOk();
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}

void QmlEngine::executeStepOut()
{
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    if (d->m_adapter.activeDebuggerClient()) {
        d->m_adapter.activeDebuggerClient()->executeStepOut();
    }
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    notifyInferiorRunRequested();
    notifyInferiorRunOk();
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}

void QmlEngine::executeNext()
{
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    if (d->m_adapter.activeDebuggerClient()) {
        d->m_adapter.activeDebuggerClient()->executeNext();
    }
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    notifyInferiorRunRequested();
    notifyInferiorRunOk();
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}

void QmlEngine::executeNextI()
{
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    executeNext();
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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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    if (state() != InferiorStopOk && state() != InferiorUnrunnable)
        return;

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    if (d->m_adapter.activeDebuggerClient()) {
        d->m_adapter.activeDebuggerClient()->activateFrame(index);
    }
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    gotoLocation(stackHandler()->frames().value(index));
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}

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

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void QmlEngine::insertBreakpoint(BreakpointModelId id)
{
    BreakHandler *handler = breakHandler();
    BreakpointState state = handler->state(id);
    QTC_ASSERT(state == BreakpointInsertRequested, qDebug() << id << this << state);
    handler->notifyBreakpointInsertProceeding(id);

    if (d->m_adapter.activeDebuggerClient()) {
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        d->m_adapter.activeDebuggerClient()->insertBreakpoint(id);
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    } else {
        foreach (QmlDebuggerClient *client, d->m_adapter.debuggerClients()) {
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            client->insertBreakpoint(id);
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        }
    }
}

void QmlEngine::removeBreakpoint(BreakpointModelId id)
{
    BreakHandler *handler = breakHandler();
    BreakpointState state = handler->state(id);
    QTC_ASSERT(state == BreakpointRemoveRequested, qDebug() << id << this << state);
    handler->notifyBreakpointRemoveProceeding(id);

    if (d->m_adapter.activeDebuggerClient()) {
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        d->m_adapter.activeDebuggerClient()->removeBreakpoint(id);
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    } else {
        foreach (QmlDebuggerClient *client, d->m_adapter.debuggerClients()) {
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            client->removeBreakpoint(id);
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        }
    }

    if (handler->state(id) == BreakpointRemoveProceeding) {
        handler->notifyBreakpointRemoveOk(id);
    }
}

void QmlEngine::changeBreakpoint(BreakpointModelId id)
{
    BreakHandler *handler = breakHandler();
    BreakpointState state = handler->state(id);
    QTC_ASSERT(state == BreakpointChangeRequested, qDebug() << id << this << state);
    handler->notifyBreakpointChangeProceeding(id);

    if (d->m_adapter.activeDebuggerClient()) {
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        d->m_adapter.activeDebuggerClient()->changeBreakpoint(id);
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    } else {
        foreach (QmlDebuggerClient *client, d->m_adapter.debuggerClients()) {
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            client->changeBreakpoint(id);
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        }
    }

    if (handler->state(id) == BreakpointChangeProceeding) {
        handler->notifyBreakpointChangeOk(id);
    }
}

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void QmlEngine::attemptBreakpointSynchronization()
{
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    if (!stateAcceptsBreakpointChanges()) {
        showMessage(_("BREAKPOINT SYNCHRONIZATION NOT POSSIBLE IN CURRENT STATE"));
        return;
    }

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

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    foreach (BreakpointModelId id, handler->engineBreakpointIds(this)) {
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        switch (handler->state(id)) {
        case BreakpointNew:
            // Should not happen once claimed.
            QTC_CHECK(false);
            continue;
        case BreakpointInsertRequested:
            insertBreakpoint(id);
            continue;
        case BreakpointChangeRequested:
            changeBreakpoint(id);
            continue;
        case BreakpointRemoveRequested:
            removeBreakpoint(id);
            continue;
        case BreakpointChangeProceeding:
        case BreakpointInsertProceeding:
        case BreakpointRemoveProceeding:
        case BreakpointInserted:
        case BreakpointDead:
            continue;
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        }
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        QTC_ASSERT(false, qDebug() << "UNKNOWN STATE"  << id << state());
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    }

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    DebuggerEngine::attemptBreakpointSynchronization();
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    if (d->m_adapter.activeDebuggerClient()) {
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        d->m_adapter.activeDebuggerClient()->synchronizeBreakpoints();
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    } else {
        foreach (QmlDebuggerClient *client, d->m_adapter.debuggerClients()) {
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            client->synchronizeBreakpoints();
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        }
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    }
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}

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bool QmlEngine::acceptsBreakpoint(BreakpointModelId id) const
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{
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    if (!DebuggerEngine::isCppBreakpoint(breakHandler()->breakpointData(id)))
            return true;

    //If it is a Cpp Breakpoint query if the type can be also handled by the debugger client
    //TODO: enable setting of breakpoints before start of debug session
    //For now, the event breakpoint can be set after the activeDebuggerClient is known
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    //This is because the older client does not support BreakpointOnQmlSignalHandler
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    bool acceptBreakpoint = false;
    if (d->m_adapter.activeDebuggerClient()) {
        acceptBreakpoint = d->m_adapter.activeDebuggerClient()->acceptsBreakpoint(id);
    }
    return acceptBreakpoint;
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}

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

void QmlEngine::loadAllSymbols()
{
}

void QmlEngine::reloadModules()
{
}

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void QmlEngine::reloadSourceFiles()
{
    if (d->m_adapter.activeDebuggerClient()) {
        d->m_adapter.activeDebuggerClient()->getSourceFiles();
    }
}

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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
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    // 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 *data,
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    const QString &expression, const QVariant &valueV)
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{
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    quint64 objectId =  data->id;
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    if (objectId > 0 && !expression.isEmpty() && d->m_adapter.activeDebuggerClient()) {
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        d->m_adapter.activeDebuggerClient()->assignValueInDebugger(expression.toUtf8(), objectId, expression, valueV.toString());
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    }
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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() && d->m_adapter.activeDebuggerClient()) {
        if (data.isValueNeeded()) {
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            d->m_adapter.activeDebuggerClient()->updateWatchData(data);
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        }
        if (data.isChildrenNeeded()
                && watchHandler()->isExpandedIName(data.iname)) {
            d->m_adapter.activeDebuggerClient()->expandObject(data.iname, data.id);
        }
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    }

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

void QmlEngine::synchronizeWatchers()
{
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    QStringList watchedExpressions = watchHandler()->watchedExpressions();
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    // send watchers list
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    if (d->m_adapter.activeDebuggerClient()) {
        d->m_adapter.activeDebuggerClient()->synchronizeWatchers(watchedExpressions);
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    } else {
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        foreach (QmlDebuggerClient *client, d->m_adapter.debuggerClients())
            client->synchronizeWatchers(watchedExpressions);
    }
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}

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unsigned QmlEngine::debuggerCapabilities() const
{
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    return AddWatcherCapability|AddWatcherWhileRunningCapability;
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    /*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 QUrl &fileUrl)
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{
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    // make sure file finder is properly initialized
    d->fileFinder.setProjectDirectory(startParameters().projectSourceDirectory);
    d->fileFinder.setProjectFiles(startParameters().projectSourceFiles);
    d->fileFinder.setSysroot(startParameters().sysroot);
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    return d->fileFinder.findFile(fileUrl);
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}

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void QmlEngine::inferiorSpontaneousStop()
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{
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    if (state() == InferiorRunOk)
        notifyInferiorSpontaneousStop();
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}

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void QmlEngine::disconnected()
{
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    showMessage(tr("QML Debugger disconnected."), StatusBar);
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    notifyInferiorExited();
}

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void QmlEngine::wrongSetupMessageBoxFinished(int result)
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{
    if (result == QMessageBox::Help) {
        Core::HelpManager *helpManager = Core::HelpManager::instance();
        helpManager->handleHelpRequest(
                    QLatin1String("qthelp://com.nokia.qtcreator/doc/creator-debugging-qml.html"));
    }
}

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void QmlEngine::executeDebuggerCommand(const QString& command)
{
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    if (d->m_adapter.activeDebuggerClient()) {
        d->m_adapter.activeDebuggerClient()->executeDebuggerCommand(command);
    }
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}

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QString QmlEngine::qmlImportPath() const
{
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    return startParameters().environment.value("QML_IMPORT_PATH");
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}

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void QmlEngine::logMessage(const QString &service, LogDirection direction, const QString &message)
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{
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    QString msg = service;
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    if (direction == LogSend) {
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        msg += ": sending ";
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    } else {
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        msg += ": receiving ";
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    }
    msg += message;
    showMessage(msg, LogDebug);
}

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void QmlEngine::setSourceFiles(const QStringList &fileNames)
{
    QMap<QString,QString> files;
    foreach (const QString &file, fileNames) {
        QString shortName = file;
        QString fullName = d->fileFinder.findFile(file);
        files.insert(shortName, fullName);
    }

    sourceFilesHandler()->setSourceFiles(files);
}

void QmlEngine::updateScriptSource(const QString &fileName, int lineOffset, int columnOffset,
                                   const QString &source)
{
    QTextDocument *document = 0;
    if (d->m_sourceDocuments.contains(fileName)) {
        document = d->m_sourceDocuments.value(fileName);
    } else {
        document = new QTextDocument(this);
        d->m_sourceDocuments.insert(fileName, document);
    }

    // We're getting an unordered set of snippets that can even interleave
    // Therefore we've to carefully update the existing document

    QTextCursor cursor(document);
    for (int i = 0; i < lineOffset; ++i) {
        if (!cursor.movePosition(QTextCursor::NextBlock))
            cursor.insertBlock();
    }
    QTC_CHECK(cursor.blockNumber() == lineOffset);

    for (int i = 0; i < columnOffset; ++i) {
        if (!cursor.movePosition(QTextCursor::NextCharacter))
            cursor.insertText(QLatin1String(" "));
    }
    QTC_CHECK(cursor.positionInBlock() == columnOffset);

    QStringList lines = source.split(QLatin1Char('\n'));
    foreach (QString line, lines) {
        if (line.endsWith(QLatin1Char('\r')))
            line.remove(line.size() -1, 1);

        // line already there?
        QTextCursor existingCursor(cursor);
        existingCursor.movePosition(QTextCursor::EndOfBlock, QTextCursor::KeepAnchor);
        if (existingCursor.selectedText() != line)
            cursor.insertText(line);

        if (!cursor.movePosition(QTextCursor::NextBlock))
            cursor.insertBlock();
    }
}

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QmlAdapter *QmlEngine::adapter() const
{
    return &d->m_adapter;
}

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QmlEngine *createQmlEngine(const DebuggerStartParameters &sp,
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    DebuggerEngine *masterEngine)
{
    return new QmlEngine(sp, masterEngine);
}

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} // namespace Internal
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} // namespace Debugger
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